JP2010089557A - Angle adjustment mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an angle adjustment mechanism attaching a frame of a sunshade of a wheelchair and a baby buggy, an armrest of the wheel chair and the like for adjusting the angle, light in weight and easy in attaching/detaching. <P>SOLUTION: The angle adjustment mechanism includes an operation part 21 having an operation lever 21a for turning toward the right and left and a pressing part 21c pressing a locking part 23, a movable part 22 having the locking part 23 and adjusting the angle of a supporting member, and a fixing part 24 mounted with a gear 24a and fixing the angle adjusted by turning the movable part 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an angle adjusting mechanism that is attached to a frame of a wheelchair, a baby carriage or the like together with an awning to adjust an angle of the awning.

  When moving in the strong sunlight during the day with a wheelchair or a baby carriage, an awning that blocks the sun is required. In the case of a baby carriage, a small sunshade is usually attached, but in the case of a wheelchair, there are few things that are installed from the beginning, and there are many things that must be installed after purchase.

  Patent Document 1 is a document related to a windproof / sunshade device for a wheelchair, and its structure is described in paragraph [0010] “A windproof / sunscreen cover 2 attached to a wheelchair 1 is sandwiched by a handle 4 of the wheelchair by a detachable clamp 4. The windproof rain / sun protection cover 2 may be attached to the wheelchair 1 by using known attachment means that can be easily attached and detached, such as a combination of a wing nut and a bolt, in addition to the clamp 4 described above. The sunshade cover 2 is constructed by extending a windproof rain cover 2b made of a transparent resin sheet under the sunshade cover 2a that blocks sunlight, the upper end of the sunshade cover 2a, the joint between the sunshade cover 2a and the windproof rain cover 2b, and Arch type frames 5a, 5b, and 5c are provided at the lower end of the windproof rain cover 2b, and the lower ends of the arch type frames 5a, 5b, and 5c are attached to the frame support 6. It is pivotally attached so that the wind and rain / sun cover 2 can be folded in. The arch frame 5b at the boundary between the sun cover 2a and the wind and rain cover 2b and the arch frame 5c at the lower end of the wind and rain cover 2b are connected to each other. It is connected with the member 5d so that the arch frame 5c at the lower end of the windproof rain cover 2b can be kept folded up to the joint arch frame 5b. "

  Patent Document 2 discloses a cover to be attached to a wheelchair or the like. The structure of the cover is from the fourth line of paragraph [0006], from “the sheet made of a natural material or a synthetic material and the above sheet from one edge thereof. A round bar wound in a roll shape is accommodated in an outer cylinder having a horizontally long cut so as to be rotatable about its axis, and the other edge of the sheet is drawn out from the cut of the outer cylinder. A cylindrical structure in which the outer cylinder and the round bar are connected by an elastic member that is biased by a force that reverses the rotation of the round bar when the round bar rotates around the axis in the outer cylinder. And a fixing bar that is arranged in parallel with the cylindrical structure and fixes the other edge of the sheet.

  Although the above-mentioned patent documents relate to the awning of the wheelchair, the angle adjustment is only in two stages, and the angle cannot be adjusted appropriately by the sun. Furthermore, as a method for adjusting the angle, the following reports are available as literatures on the folding mechanism of a stroller.

  In the claims of Patent Document 3, a protruding piece provided so as to overlap the opposite ends of both the left and right members, and the overlapping protruding piece are pivotally supported and provided by an upper end side push. A support shaft provided so as to descend against a certain return force, a longitudinal groove provided so that at least the upper and lower edge surfaces of the projecting piece overlap with the support shaft insertion hole wall of the projecting piece, Projects from the outer peripheral surface, and is located in the longitudinal groove so as to straddle the upper and lower projecting pieces when the support shaft is in the rising and returning state, and only in the longitudinal groove of the lower projecting piece when the support shaft is lowered. There is disclosed a locking device for a joint portion including a protrusion provided to be positioned.

  In the folding mechanism of the stroller of Patent Document 4, in the paragraph [0017], the passive gear 4g and the driving gear 1g are configured as bevel gears in which a tooth surface inclined at a peripheral edge portion in a disk state is cut. When the gear 1g is rotated about 90 degrees in the left-right direction with respect to the axial direction of the front leg 1 or rear leg 2, the passive gear 4g is about 90 degrees in the circumferential direction of the front leg 1 or rear leg 2. It is described that it is configured to rotate forward or reverse within a range. Thus, the folding mechanism of the stroller of Patent Document 2 is composed of two gears.

  As shown in FIG. 1, paragraphs [0031] to [0034] show the structure of the push bar of the stroller of Patent Document 5, and the push bar 15 of the present embodiment is located above the lock release member 38 and the locking member 42. A pair of side pipes 67 extending inward and a remote operation device 37 provided on a U-shaped pipe 68 disposed between the pair of side pipes 67 are provided. Further, a wire 69 is connected to the remote control device 37, and this wire 69 is connected to a lock release member 38 provided below each side pipe 67. In addition, as shown in FIGS. 1, 7, 8, and 9, the hand barb 15 is provided on each side pipe 67, and has one external gear 71 and one joint 61 having a wire guide 90. The U-shaped pipe 68 is provided with the other external gear 83 and the wire guide path 90, and the other joint 65 that is rotatable relative to the corresponding one joint 61. Among these, between one joint 61 and the other joint 65, there is an internal gear 63 that is detachably engaged with one external gear 71 of one joint 61 and the other external gear 83 of the other joint 65. Is provided. Further, a guide member 64 having a wire guide shaft 74 for guiding the wire 69 is provided between the other joint 65 and the internal gear 63 in the vicinity of the rotation center of the other joint 65.

Since the folding mechanism of the stroller has a large structure to be installed, the folding mechanism is also large and often sturdy. However, a folding mechanism for attaching a sunshade to a wheelchair frame or the like is preferably a light and easy to attach / detach, and the appearance of such a folding mechanism is desired.
JP-A-11-197188 JP 2004-65895 A No. 07-32977 Utility Model Registration No.2542122 JP 2007-98996 A

  The present invention provides a folding mechanism for attaching a sunshade or the like to a frame of a wheelchair or a stroller, etc., and provides a folding mechanism that can be easily removed by measurement.

  As a result of intensive studies to provide an angle adjustment mechanism that can be easily installed on a wheelchair or stroller frame and easy to adjust the angle, a movable part that is inserted along a column and operates along a gear, An angle adjusting mechanism including a locking means for locking the movable portion to the wheelchair or stroller frame is provided.

  The feature of the present invention is that an operating lever that rotates left and right, an operating portion that has a pressing portion that presses the engaging portion, a movable portion that has an engaging portion and adjusts the angle of the support member, and a gear are installed. An angle adjusting mechanism comprising: a fixed portion that fixes an angle adjusted by rotating the movable portion; and when the movable portion is rotated, the locking portion of the movable portion and the fixed portion The angle adjustment mechanism is characterized in that the number of steps of the inclination angle can be discriminated by rubbing noise with the gear. The rubbing sound between the locking portion of the movable portion and the gear of the fixed portion is generated by contact with a convex portion provided on the locking portion. The support member is a awning frame or the like that is attached to a wheelchair or a baby carriage.

  Another feature of the present invention is that the operation lever having an operation lever that rotates to the left and right, the operation portion having a pressing portion that presses the locking portion, and the large and small gears are attached in two stages to support the member and adjust the angle. A movable part, a fixed part for fixing an angle adjusted by rotating the movable part and having a tooth engaging with a large gear around the movable part and an engaging part engaging with the small gear inside the movable part; The angle adjusting mechanism is characterized in that the number of steps of the inclination angle can be determined by the rubbing sound between the small gear and the locking portion. The support member can obtain a comfortable posture by adjusting the angle when used, and can be exemplified by a frame such as an armrest or a headrest attached to a wheelchair or the like.

  Another feature of the present invention is an angle adjustment mechanism that can be fixed with one touch by adjusting the inclination angle of the support member.

  The angle adjusting mechanism of the present invention can be easily attached to an armrest of a wheelchair, a sunshade frame of a wheelchair or a stroller, etc. is doing. Furthermore, it has the effect that it can fix with one touch by adjusting the inclination angle of a support | pillar.

  Hereinafter, the angle adjusting mechanism of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following examples.

  The angle adjustment mechanism 100 of the present invention is attached to a frame such as a wheelchair 10 or a stroller in order to install a cover (A) such as an awning. For example, as shown in FIG. 1, a rear frame 12 having a grip 11 at the top and a main wheel 16 at the lower end, a side frame 13 attached in the middle of the rear frame 12, and a caster 17 at the lower end. The side view which attached the angle adjustment mechanism 100 of this invention to the rear frame 12 of the wheelchair 10 which has the frame comprised from the front frame 14 with which the footrest frame 15 which has the footrest 19 in the front part was installed is shown.

  FIG. 2 is a perspective view in which the angle adjustment mechanism 100 is attached to the frame 12 of the present invention. An operating portion 21 having a display portion 21b indicating whether or not the operating lever 21a is locked is attached to the movable portion 22 so as to be rotatable. A hole 22a for inserting a support member column such as an awning is formed in the side surface of the movable portion 22, and the support member column is inserted into the hole 22a and fixed by tightening with a screw from the upper screw hole 22b. The movable part 22 is screwed to a fixed part 24 having a gear. The angle adjusting mechanism 100 is attached so that the frame 12 is sandwiched between the fixing portion 24 and the holding portion 27.

  FIG. 3 is an exploded perspective view of the angle adjustment mechanism 100 of the present invention. The operation part 21 having a display part 21b indicating whether or not the operation lever 21a is locked and a pressing part 21c that presses the locking part 23 can be rotated by inserting the pressing part 21c into the hole 22c of the movable part 22. It is attached to. A hole 22a for inserting a support member column such as an awning is formed on the side surface of the movable portion 22, and the support member column is inserted into the hole 22a and tightened with a screw from the upper screw hole 22b. To fix. The pressing portion 21c of the operation portion 21 is inserted into the movable portion 22, and the locking portion is inserted into the movable portion 22, and washers 25, 25 are attached to the fixed portion 24 having a gear, and are screwed with screws 26. To do. The recessed portion 24b at the other end 24b of the fixing portion 24 holds the frame 12 together with the recessed portion 27b of the holding portion 27 and fastens the screws 28 and 28 through the screw holes 27a and 27a to be attached to the frame.

FIG. 4 shows an exploded perspective view of the angle adjustment mechanism, and shows an exploded perspective view from the reverse direction of FIG. The pressing portion 21c of the operation portion 21 protrudes from the holes 22c and 22c of the movable portion 22 and presses the convex portions 23a and 23a of the locking portions 23 and 23 inserted into the insertion holes 22d and 22d of the locking portion later. Then, the convex portions 23b and 23b of the locking portion are engaged with the gears, and the movement of the movable portion 22 is pressed and fixed. When the locking part 23 is not pressed, the locking part 23 is in a state of lightly contacting the gear, and when the movable part 22 is rotated, the inclination angle is generated by the frictional noise between the convex parts 23b and 23b of the locking part and the gear. Can be determined.
After the movable portion 22 is rotated to adjust the angle, the operation lever 21a of the operation portion 21 is turned to a locked state.

  FIG. 5 is an exploded perspective view of an angle adjustment mechanism 200 according to another embodiment of the present invention. The angle adjustment mechanism 200 shown in FIG. 5 includes an operation portion 21 having a display portion 21b indicating whether or not the operation lever 21a is locked and a pressing portion 21c that presses the locking portion 23. Insert so that the lid is covered. When the operation lever 21a is turned, the pressing portion 21c rises along the slope provided on the inner surface of the movable portion 22 to the platform 22f, the spring member 22i is contracted, and the large gear 22g outside the movable portion 22 is fixed to the fixed portion 24. The movable portion 22 can rotate freely, and the inner small gear 22h comes into contact with the convex portions 23b and 23b of the locking portion 23 attached to the concave portions 24d and 24d of the fixed portion 24 to generate a rotating sound. . A method of attaching to a frame or the like will be described later.

  The difference between the angle adjusting mechanism 100 shown in FIG. 4 of the present invention and the angle adjusting mechanism 200 of another embodiment is that the mounting position of the gear and the mounting position of the locking portion are changed, and the spring is interposed between the movable portion 22 and the fixed portion 24. The member 22i is inserted so that the movable portion 22 and the fixed portion 24 can be attached and detached, and the large gear 22g of the movable portion 22 and the teeth 24c of the fixed portion 24 are engaged with each other to make the fixed state stronger.

  6 is an exploded perspective view of an angle adjustment mechanism 200 according to another embodiment of the present invention, and shows a perspective view as viewed from the opposite side of FIG. The pressing portion 21c of the operation portion 21 rises from the slope 22 of the movable portion 22 to the top 22f, contracts the spring member 22i, and meshes with the large gear 22g of the movable portion 22 on which the support member is attached and the teeth 24c of the fixed portion 24. Detaches and the movable portion 22 is rotatable, and the angle of the support member can be adjusted. After rotating the movable part 22 and adjusting the angle, when the operating lever 21a of the operating part 21 is released, the spring member 22i is returned to its original state, and the large gear 22g and the teeth 24c of the fixed part 24 mesh. Fixed.

  FIG. 7 is a perspective view in which an angle adjustment mechanism 200 according to another embodiment of the present invention is attached to an armrest of a wheelchair as a support member. A mounting portion 29a of the armrest 29 is screwed with a screw 29b into a screw hole 22j drilled on the movable portion 22 of the angle adjusting mechanism 200, and a screw hole drilled on the back surface of the fixed portion 24 of the angle adjusting mechanism 200 ( The attachment portion 30a of the frame 30 of the armrest is fixed to the armrest with screws 30b (not shown).

  FIG. 8 is a perspective view in which an angle adjustment mechanism 200 according to another embodiment of the present invention is attached to an armrest of a wheelchair as a support member. When the lever 21a of the operating portion 21 of the angle adjusting mechanism 200 is pulled and rotated, the pressing portion 21c contracts the spring member 22i, and the engagement of the large gear 22g of the movable portion 22 and the teeth 24c of the fixed portion 24 is disengaged. The portion 22 can turn freely, and the angle of the armrest 29 can be adjusted. When the operation lever 21a is released, the biased spring member 22i returns to the original state, the large gear 22g of the movable portion 22 meshes with the teeth 24c of the fixed portion 24, and the armrest 29 is fixed at an arbitrary angle. Further, when the operation lever 21a is turned to release the lock and the movable part 22 is held and turned to the left or right, the small gear 22h of the movable part 22 and the recesses 23b and 23b of the lock part of the fixed part 24 come into contact with each other. Thus, a rubbing sound is generated, and the number of steps of the tilt angle can be determined by the rubbing sound.

  The material for producing the angle adjusting mechanism of the present invention is not particularly limited, but a lightweight alloy, hard plastic, or the like is desirable from the purpose of use and the installation position.

FIG. 1 shows a side view of the angle adjustment mechanism of the present invention attached to the rear frame of a wheelchair. FIG. 2 is a perspective view of the operation unit of the angle adjustment mechanism of the present invention. FIG. 3 shows an exploded perspective view of the angle adjustment mechanism of the present invention. 4 is an exploded perspective view of the angle adjustment mechanism of the present invention, and shows a perspective view as viewed from the opposite side of FIG. FIG. 5 is an exploded perspective view of an angle adjustment mechanism according to another embodiment of the present invention. 6 is an exploded perspective view of an angle adjusting mechanism according to another embodiment of the present invention, and shows a perspective view seen from the opposite side of FIG. FIG. 7 is a perspective view in which another angle adjustment mechanism of the present invention is attached to an armrest of a wheelchair. FIG. 8 is a perspective view in which an angle adjustment mechanism according to another embodiment of the present invention is attached to an armrest of a wheelchair.

Explanation of symbols

100: Angle adjustment mechanism 200: Another form of angle adjustment mechanism 10: Wheelchair 11: Grasping part 12: Rear frame 13: Side frame 14: Front frame 15: Footrest frame 16: Main wheel 17: Front caster 18: Brake 19 : Footrest 21: operation part 22: movable part 23: locking part 24: fixed part 25: washer 26: screw 27: clamping part 28: screw 29: armrest 30: frame of armrest

Claims (3)

An operation lever having an operation lever that rotates to the left and right, a pressing portion that presses the locking portion, a movable portion that has a locking portion and adjusts the angle of the support member, and a gear are attached to rotate the movable portion. An angle adjusting mechanism comprising a fixed portion for fixing the adjusted angle by moving, and when the movable portion is rotated, a rubbing sound between the locking portion of the movable portion and the gear of the fixed portion is generated. An angle adjusting mechanism characterized in that the number of inclination angles can be determined. An operation part having an operation lever that rotates left and right and a pressing part that presses the locking part, a large and small gear are attached, a movable part that adjusts the angle of the support member, and a large gear of the movable part mesh An angle adjusting mechanism comprising: a locking portion that engages with a tooth and a small gear; and a fixed portion that fixes an angle adjusted by rotating the movable portion; and the small gear and the locking portion. An angle adjustment mechanism characterized in that the number of steps of the inclination angle can be discriminated by the rubbing noise. The angle adjusting mechanism according to claim 1, wherein the angle of the supporting member can be adjusted by one touch by adjusting the angle.

Images