JP3825535B2 - Silver mosquito - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wheelbarrow, and in particular, an elderly person can use it instead of a cane when taking a walk or the like, and can sit down or store a purchased item as needed, so-called elderly It relates to cars or silver cars.
[0002]
[Prior art]
Various forms of silver cars have been announced and put into wide use. For example, utility model registration No. 18855581, utility model registration No. 2012479, utility model registration No. 2066032, JP-A-7-117673, and the like.
[0003]
[Problems to be solved by the invention]
However, conventional silver cars have been complicated to fold and expand. For example, in some cases, the push rod was folded down by pulling it toward you and pushed it to the vicinity of the floor surface, and when expanding, it was necessary to bend the waist and pull up the push rod near the floor surface. Such an operation would impose a great burden on the elderly user. In yet another case, when folded, the silver car cannot stand on its own, for example it needs to lean against a wall or door, and if there is no such standing part, it can be folded After that, it was often placed on the road or even kept open. However, when placed on the road surface, when using the silver car afterwards, it is necessary to clean the push bar part and the seat part, and if it is further expanded, it will interfere with the person passing the passage, There were various problems. In some cases, the push rod and the rear wheel or front wheel maintain a self-supporting state when folded. However, this type of device has a problem that it lacks stability in an upright state and often falls easily.
[0004]
[Means for Solving the Problems]
In order to solve the above problem, the front leg 14 having the front wheel 12 at the lower end of the present invention, the rear leg 15 connected to the front leg 14 so as to be pivotable and having the rear wheel 13 at the lower end, and the push rod 11 , The push rod 11 and the upper end of the rear leg 15 are pivotally connected to each other by an armrest lever 62, and the pivot rod 74 and one end of the pivot connection lever 88 are connected to the push rod 11. The other end of the pivot lever 74 is pivotally attached to the end of the seat pipe 76, and the end of the pivot coupling lever 88 is pivotally attached to one end of the rear leg folding lever 91. One end of a front leg folding lever 93 is pivotally attached to the other end of the rear leg folding lever 91, the other end of the front leg folding lever 93 is pivotally attached to the front leg 14, and the upper end of the front leg 14 is pivoted on the seat pipe 76. Furthermore, the seat pipe 76 is One end of the lever 85 pull between the pivot position of the pivot position and the pivoting lever 74 of the leg 14 is pivotally mounted, the other end of the pull-in lever 85 is pivotally connected to the rear legs folding lever 91.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1 which shows the side view seen in the position which expanded the silver car 10 concerning this invention, the code | symbol 11 is a push rod, the code | symbol 12 is a front wheel, the code | symbol 13 is a rear wheel, code | symbol 14 Is a front leg having a front wheel 12 at the lower end, and reference numeral 15 is a rear leg having a rear wheel 13 at the lower end. In this type of silver car, the left and right side surfaces are constituted by substantially the same elements, so only the elements on one side will be described below. Therefore, the elements described below are similarly arranged on the left and right side surfaces unless otherwise specified. In this embodiment, as shown in FIG. 3 described later, each front wheel 12 is a double wheel and each rear wheel 13 is a single wheel. However, the present invention is not limited to this, and the front wheel is a single wheel. The rear wheel may be a double wheel, and both the front wheel and the rear wheel may be a double wheel or a single wheel.
[0006]
The push bar 11 receives a pair of left and right lower portions 20 extending in the vertical direction and the upper ends of the pair of lower portions 20 and is generally U-shaped and connects both side portions in the same manner as a push bar of a known silver car. And an upper portion 21 that has a generally inverted U shape as a whole. More specifically, the upper end portion of each linear lower portion 20 is received in a nested manner at the lower end portion of the upper portion 21 having a U-shape. Here, a plurality of (for example, two) holes (not shown) are provided in the upper end portion of the lower portion 20 at intervals in the longitudinal direction. Further, one hole (not shown) is provided in the lower end portion of the upper portion 21. These holes are engaged with stoppers 22 as shown in FIG. The stopper 22 includes a holding portion 23 having a curved surface that matches the outer surface of the upper portion 21, and a pin-like protrusion 24 that protrudes from the central portion of the holding portion 23. That is, for example, the upper hole provided in the lower portion 20 is aligned with the hole provided in the upper portion 21, and then the protrusion 24 of the stopper 22 is engaged with these holes, and thereafter, the outer surface of the stopper 22 is moved to. Then, the holding cylinder 25 that has been previously attached to the upper portion 21 is covered, and the stopper 22 is fixed by the holding cylinder 25. If it is desired to adjust the height position of the push rod 11, the holding cylinder 25 is moved upward, the stopper 22 is removed, the upper portion 21 of the push rod 11 is moved in the vertical direction, the height is adjusted, and the upper portion is adjusted. After aligning the 20 holes with the holes in the lower portion 21, the stopper 22 is again engaged with the aligned holes, and the stopper 22 is fixed by the holding cylinder 25, so that the adjustment can be easily performed. is there.
[0007]
A cover member 26 made of a foam material or other suitable material is wound around the transverse portion of the upper portion 21 of the push rod 11 so that the user of the silver car can easily grasp the portion. In addition, a brake lever 31 for operating a braking device 30 (see FIG. 9) for braking the silver car is mounted on the push bar 11 in the same manner as a known silver car push bar. The brake lever 31 includes a pedestal 32 attached to the upper portion 21 of the push bar 11, a U-shaped operating rod 33 extending over both sides of the silver car, and the pedestal 32 is fixed to the push bar 11 and operated. The pin 34 is pivotally attached to the pedestal 32 and the push rod 11 and a wire (not shown) that is fixed to the operation rod 33 and extends through the pedestal 32. ing. As shown in FIG. 9, the braking device 30 includes an operating piece 35 and a spring 36. The operating piece 35 includes a pair of outwardly extending braking pieces 37 that are in direct contact with the rear wheel 13 during braking, a swinging part 38 attached to the inner ends of these braking pieces 37, and a left and right side swinging piece. And a traversing portion 39 connecting the moving portion 38. One end of the spring 36 is hooked on the operating piece 35 and the other end is held by the rear leg 15, thereby urging the operating piece 35 in one direction, and the braking piece 37 is normally moved from the rear wheel 13. In, it keeps in the free position. In the illustrated example, the lower end of the spring 36 is latched to the position of the braking piece 37 of the operating piece 35, and the upper end is held by the rear leg 15. However, these positions are such that the braking piece 37 is in a normal state and the rear wheel. It can be changed as appropriate so that the spring is biased to a position maintained at a position free from 13. The swinging portions 38 of the operating pieces 35 are pivotally attached to the left and right rear legs 15 by pin means 41 (FIG. 1) through holes 40, respectively. Further, one swinging portion 38 is provided with a hole 42 for fixing the other end of the wire whose one end is fixed to the operation rod 33 of the brake lever 31. Therefore, the wire is fixed to this hole 42 by an appropriate fixing means. Due to such a configuration, the braking device 30 rotates the braking lever 31 around the pin 34 in the clockwise direction, whereby the wire operates, and the operating piece 35 penetrates the hole 40 against the elastic force of the spring 36. It rotates counterclockwise around the pin means 41, and the braking piece 37 contacts the outer surface of the rear wheel 13 to brake the rear wheel.
[0008]
A connecting member 45 having a configuration as shown in FIGS. 4 and 5 is attached to an intermediate portion of the lower portion 20 of the push rod 11. The connecting member 45 is preferably formed integrally with a synthetic resin. The connecting member 45 has a through hole 46 that vertically penetrates at one end thereof, a tubular upward projecting portion 48 having an open hole 47 that opens upward at the other end thereof, and one lateral side. A tubular side protrusion 50 having a side opening hole 49 that opens toward the side, a tubular side protrusion 52 having a pin through hole 51 through which the pin passes toward the other side, have. Of course, it is obvious to those skilled in the art that the connecting member 45 disposed on the other side is configured such that the tubular side protrusion 50 and the tubular side protrusion 52 are symmetrical. The open hole 47 is a blind hole, and the tubular upward projecting portion 48 is provided with a hole 53 penetrating laterally. The side opening hole 49 is a blind hole, and the tubular side protrusion 50 is provided with a hole 54 penetrating in the front-rear direction. Further, the pin through hole 51 extends through the through hole 46 to the side of the connecting member 45.
[0009]
The push rod 11 is inserted into a through hole 46 that penetrates the connection member 45 vertically, and the connection member 45 is fixed to a predetermined position of the push rod 11 by a pin 55 that penetrates the pin through hole 51. The open hole 47 of the upper projecting portion 48 located in front of the hole 46 has a U-shape extending from one side to the other side, that is, from the right (left) side to the left (right) side. One lower end of the back support rod (not shown) is received and fixed by a pin (not shown) through the hole 53. The other lower end portion of the back support bar is received in a hole of a connecting member similarly arranged on the other side, and is similarly fixed by a pin. Further, one end of a transverse member 60 (FIG. 3) is inserted into a side opening hole 49 formed inside the tubular side protrusion 50, and is fixed by a fixing means 61 such as a pin through the hole. . The other end of the traversing member 60 is inserted into a similar hole of a connecting member similarly disposed on the other side of the silver car, and is similarly fixed thereto by fixing means 61 such as a pin (FIG. 3). This prevents lateral movement of the silver car. Further, in the pin through-hole 51 formed inside the tubular side projection 52, the rear end portion of the armrest lever 62 whose front portion is bent downward is provided by the pin 55 via the spacer 63 (FIG. 3). It is pivotally attached. The armrest lever 62 is provided with a cover member 64 made of foam or other cushioning material. The front end portion of the armrest lever 62 is connected to the upper end portion of the rear leg 15. In this embodiment, the front end of the armrest lever 62 and the upper end of the rear leg 15 are connected by a connecting member 65 as shown in FIG. The connecting member 65 includes a box part 67 having an opening 66 and a cylindrical body part 68 extending from one end part of the box part 67. Furthermore, holes 69 and 70 for receiving pins and the like are provided in the box portion 67 and the cylindrical body portion 68 in substantially parallel. The connecting member 65 can be integrally molded with resin, for example. The box portion 67 receives the upper end portion of the rear leg 15, and supports the rear leg 15 and the armrest lever 62 so as to be pivotable by a pin 71 passing through the hole 69. On the other hand, the columnar portion 68 is inserted into the front end portion of the armrest lever 62 formed of a cylindrical member, and the rear leg 15 and the armrest lever 62 are fixedly connected by a pin 72 passing through the hole 70.
[0010]
One end of a relatively short linear pivot lever 74 is pivotally coupled by a coupling means 75 such as a pin, slightly below the portion of the push bar 11 to which the connecting member 45 is fixed. The other end of the pivot lever 74 is connected to the end of a seat pipe 76 bent in a U shape as viewed from above by a connecting means 77 such as a pin. The other end of the U-shaped seat pipe 76 is pivotally attached to the other end of a linear pivot lever that is similarly provided on the other side of the silver car. The U-shaped seat pipe 76 forms a seat that can be seated by the user of the silver car as required, and further provides a frame for storing the shopping bag.
[0011]
As shown in FIG. 7, a holding member 78 obtained by bending a flat plate into a substantially U shape has a hole 79 in the middle portion of the straight portion extending in the front-rear direction of the seat pipe 76 bent into a U shape. It is fixed by fixing means 80 such as a penetrating pin. The upper end of the front leg 14 is pivotally connected to the holding member 78 by a pivoting means 82 such as a pin passing through the hole 81. The front leg 14 and the rear leg 15 are pivotally connected to each other by a pivoting means 84 such as a pin via a spacer 83 (FIG. 3) at their intersection. In addition, as shown in FIG. 3, the upper end part of the said rear leg 15 is expanded a little outward laterally so that it may be easy when sitting. Note that the right half of FIG. 3 is a view of the silver mosquito when the present invention is expanded from the rear, and the left half is a view of the silver mosquito when the present invention is expanded from the front.
[0012]
Between the end portion of the seat pipe 76 where the pivot lever 74 is pivotally attached and the intermediate portion where the holding member 78 is fixed, the upper end portion of the pull-in lever 85 is pivotally attached such as a pin. Connected to the seat pipe 76 by means 86.
[0013]
Further, the push rod 11 is provided with a closing plug 87 (FIG. 2) between a lower end portion thereof fixed by a lock pin 99 described later and a portion where one end portion of the pivot lever 74 is pivotally attached. One end of the dynamic connecting lever 88 is connected by a pivoting means 89 such as a pin. The other end of the pivot connecting lever 88 is opposite to the rear leg 15 at a position between the lower end of the rear leg 15 and the position of the pivot means 84 to which the front leg 14 is pivotally attached. They are connected by a pivoting means 90 such as a pin. One end of a rear leg folding lever 91 is pivotally attached to the pivot attachment means 90. Further, the other end portion of the rear leg folding lever 91 is connected to the other end portion of the front leg folding lever 93 whose one end portion is pivotally attached to the front leg 14 by a pivoting means 92 such as a pin by a pivoting means 94 such as a pin. Has been. Here, a lower end portion of the retracting lever 85 is connected to an intermediate portion of the rear leg folding lever 91 by a pivoting means 95 such as a pin. Further, a hook 96 known per se is pivotally attached to the pivot attachment means 90. The hook 96 is operated by rotating the flange 96 around the pivoting means 90 by operating the flange 97, whereby the lock pin 99 in which the groove 98 of the hook 96 fixes the closing plug 87 at the lower end of the push rod 11. To keep the silver car open.
[0014]
A wheel holder 100 is attached to the lower end of the front leg 14. The wheel holder 100 includes a fixed portion 101 and a rotating portion 102 located below the fixed portion 101. The fixing portion 101 has a side surface shape such as a right angle elbow, and has a protruding portion 103 (FIG. 3) protruding from a part thereof toward the inside of the silver squirrel. As shown in FIG. 1, the front end portion of the front leg 14 bent so as to be substantially parallel to the ground when expanded is inserted into the elbow portion of the fixing portion 101, and fixed to the elbow portion by fixing means 104 such as a pin. Has been. Further, a traversing member 105 is inserted into the protrusion 103 as shown in FIG. 3, and is fixed by appropriate fixing means (not shown). The traversing member 105 prevents the silver mosquito from rolling. Further, a rotating part 102 supporting the front wheel 12 at the lower end is inserted into the other elbow part of the fixed part 101 so as to be rotatable by a known method. Thus, the rotating unit 102 provides a caster effect so as to facilitate the operation of the silver mosquito. A protrusion 106 is provided on the lower portion of the front surface of the fixed portion 101. On the other hand, the rotating part 102 is provided with a hook member 107 so as to be pivotable. By pivoting the hook member 107 upward and engaging the hook member 107 with the protrusion 106, free rotation of the rotating portion 102 is prevented and the caster effect can be limited.
[0015]
This silver car 10 is provided with a silver car stop device 110 in addition to the braking device 30. In the case of a bicycle, the braking device 30 is a brake, and the stopping device 110 is a lock. As shown in FIG. 10, the stopping device 110 includes a swing piece 111 pivotally attached to one rear leg 15, a stepping piece 112, and a swing member 113 pivotally attached to the other rear leg. And a stop rod 114 that connects the stepping piece 112 and the swinging member 113, and a spring 115 that elastically holds the swinging piece 111 in one direction. The swing piece 111 has holes 116 and 117 at the top and bottom, respectively, and a circular long groove 118 in the middle of these holes. The swing piece 111 is pivotally attached to the rear leg 15 on one side by a pivot attachment means 119 such as a pin through a hole 116. The hole 117 holds one end of a spring 115 that elastically holds the swing piece 111 in one direction, and the other end of the spring 115 is held by the lower end of the rear leg 15. The stepping piece 112 includes a long lever 120, a short lever 121, and a connection lever 122 that connects the two. A hole 123 is provided in the middle portion of the long lever 120 and is pivotally attached to the rear leg 15 by the pin means 41 through this hole. The end of the long lever 120 is pivotally connected to the long groove 118 of the swing piece 111 via a pivot means 124 such as a pin. A stop rod 114 passing through the long lever 120 and the short lever 121 extends through the swinging member 113 pivotally attached to the other rear leg through a hole 125 at the end. Both ends of the stop rod 114 can be fitted between a plurality of short projecting pieces (not shown) extending in the radial direction formed at the center of the rear wheel 13. The long lever 120, the short lever 121, and the connection lever 122 form an operation unit that allows a silver squirrel operator to operate the stop device 110 with his / her foot.
[0016]
When maneuvering the silver car, the pivoting means 124 of the stop device 110 is located below the long groove 118, and the stop bar 114 is separated from the protruding piece of the rear wheel. In order to maintain this unlocking position, the spring 115 elastically holds the swing piece 111 of the stopping device 110 so that the pivot means 124 is held at a position below the long groove 118. In this state, the silver mosquito can run freely. If it is desired to completely stop the silverfish, the operation unit of the stop device 110 is stepped down against the elastic force of the spring 115. At this time, when the pivoting means 124 moves upward in the long groove 118, the swinging piece 111 once rotates slightly clockwise, and further moves upward in the long groove 118. , And the pivoting means 124 moves to the upper end of the long groove 118. In this position, the end of the stop rod 114 enters between the protruding pieces of the rear wheel, completely preventing the rotation of the rear wheel and stopping the silver lamp. When releasing the stop state, the end of the stop rod 114 can be easily released from between the protruding pieces of the rear wheel by lifting the operating part upward with the foot, and normal running is possible. Although not shown, the stop device 110 can also be operated by a so-called side lever that extends to the upper side of the silverfish as is well known. Thereby, since the operator of the silver squirrel can operate the stop device 110 while sitting on the seat, it is safe.
[0017]
As described above, in order to provide a caster effect, the left and right front wheels 12 are independent from each other, but the rear wheel 13 extends over both the left and right sides of the silver car and is attached to the lower end of the rear leg 15. Attached to both ends of the axle 130.
[0018]
That is, the silver mosquito of the present invention includes a front leg 14 having a front wheel 12 at the lower end, a rear leg 15 connected to the front leg 14 so as to be pivotable (84) and having a rear wheel 13 at the lower end, and a push rod. 11, and the push rod 11 and the upper end of the rear leg 15 are connected to each other by an armrest lever 62 so as to be pivotable (55, 71). The push rod 11 has a pivot lever 74 and a pivot connection lever 88. One end of the pivot pipe (75, 89) is pivotally attached, the other end of the pivot lever 74 is pivotally attached (77) to the end of the seat pipe 76, and the end of the pivot coupling lever 88 is attached to the rear leg. One end of the folding lever 91 is pivotally attached (90), one end of the front leg folding lever 93 is pivotally attached (94) to the other end of the rear leg folding lever 91, and the other end of the front leg folding lever 93 is connected to the front leg 14. The seat leg pipe 76 is pivotally attached (92), and the front leg 14 The upper end is pivoted (82), and the seat pipe 76 is pivoted with one end of the retracting lever 85 between the pivot (82) position of the front leg 14 and the pivot (77) position of the pivot lever 74. The other end of the retracting lever 85 is pivoted (95) to the rear leg folding lever 91. Further, in the present invention, at least the push bar 11, the armrest lever 62, the rear leg 15, the pivot connecting lever 88, the rear leg 15, the rear leg folding lever 91, the front leg 14, and the front leg folding lever 93 are connected to a four-bar rotation chain. Is formed.
[0019]
The silver car folding operation relating to the present invention will be described. First, when the silver car 10 in the expanded state shown in FIG. 1 is folded, the hook 96 is operated counterclockwise around the pivoting means 90 and the groove 98 of the hook 96 is formed at the lower end of the push bar 11. Pull away from a lock pin 99. Next, the traversing portion of the push bar 11 is held and pushed forward and downward. At this time, since the rear end portion of the armrest lever 62 is connected by the pin 55, it moves downward together with the push bar 11. For this reason, the front end of the armrest lever 62 moves relatively upward, the rear leg 15 connected by the pin 71 is pulled up, and the rear wheel 13 pivots around the pivoting means 84 and moves forward. To do. By the movement of the rear leg 15, the front portion of the seat pipe 76 is pushed upward around the connecting means 77 in the clockwise direction via the pivoting means 84 and 82 and the fixing means 80 of the front leg 14 and the holding member 78. As the pipe 76 moves, the lower part of the front leg 14 rotates around the pivoting means 92 to draw the front wheel 12 toward the rear wheel 13. Furthermore, the pull-in lever 85 pivots around the pivoting means 86 and 95 by the movement of the pipe 76 and pulls the rear portion of the rear leg folding lever 91 upward. As a result, the front part of the rear leg folding lever 91 moves downward around the pivot means 94, thereby moving the rear part of the front leg folding lever 93 downward, and the front part of the front leg folding lever 93 is As the front leg 14 moves around the pivoting means 92, it moves upward.
[0020]
When the push rod 11 is further pushed downward, the rear end portion of the armrest lever 62 moves further downward together with the push rod 11, and at the same time, the front end portion of the armrest lever 62 moves upward, raising the rear leg 15 in a more upright state, In addition, the rear wheel 13 is moved further forward. By the movement of the rear leg 15, the front portion of the seat pipe 76 rises further upward through the front leg 14 and the holding member 78, and the pivot lever 74 in FIG. Rotate clockwise around 75 to push the pipe 76 up further. For this reason, the lower part of the front leg 14 further draws the front wheel 12 toward the rear wheel 13 side. Further, as the pipe 76 moves downward, the retracting lever 85 pulls up the rear portion of the rear leg folding lever 91, and the pivot connecting lever 88 rotates around the pivoting means 89 on the push rod 11 in the clockwise direction. The rear part of the folding lever 91 moves so as to rise further upward. Further, the front portion of the rear leg folding lever 91 moves further downward, thereby pulling the front leg 14 to the rear leg side finally through the front leg folding lever 93 to the position shown in FIG.
[0021]
In this position, the rear wheel 13 is positioned outward in the width direction of the front wheel 12 (see FIG. 3), and the front wheel and the rear wheel slightly overlap in the front-rear direction, so that the silver car 10 is completely self-standing. Form. Since the silver car folded in the position shown in FIG. 2 can stand on its own freely anywhere, its storage is extremely easy. Although not shown in FIG. 2, in the folded position of FIG. 2, a position in which the groove 98 (FIG. 1) of the hook 96 pivoting around the pivoting means 90 engages, for example, a pivot coupling lever 88 or a retracting lever. By providing a lock pin at a predetermined position 85 and engaging the hook and the lock pin, this position can be completely maintained. At this position, the silver mosquito can be moved freely in a folded state.
[0022]
In order to expand the silver car from the folded position shown in FIG. 2 to the expanded position shown in FIG. 1, the push bar 11 is simply pulled upward after the hook is removed from the lock pin. Due to the weight of the wheel or each lever, the silver car easily and quickly defines the expanded position of FIG. Thereafter, the groove 98 of the hook 96 may be hooked on the lock pin 99 provided at the lower end of the push bar 11.
[0023]
【The invention's effect】
According to the present invention, the silverfish can be easily folded and expanded with a single touch. When folded further, the silver car can stand by itself easily and reliably. Further, since the stance leg can be folded into an almost upright state in a stable state by the front wheel and the rear wheel, it is sufficiently possible even in a small space. In addition, at least two sets of four-node rotating chain structure can provide a stable and strong silver mosquito.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a side view of a silver mosquito according to the present invention viewed in an expanded position.
FIG. 2 is a side view of the silver mosquito according to the present invention viewed in an upright position.
FIG. 3 is a part of the silver mosquito according to the present invention as seen from the front in the expanded position, and partly seen from the rear.
FIG. 4 is a perspective view of a connecting member of the silver mosquito of the present invention.
5 is a view of the connection member of FIG. 4 as viewed from above.
FIG. 6 is a perspective view of a connecting member for silver mosquitoes according to the present invention as viewed from below.
FIG. 7 is a perspective view of a silver mosquito holding member of the present invention.
FIG. 8 is a perspective view of a stopper for adjusting the length of the push pin of the silver squirrel of the present invention.
FIG. 9 is a perspective view of a silver mosquito braking device according to the present invention.
FIG. 10 is a perspective view of a silver mosquito stop device according to the present invention.
[Explanation of symbols]
10: Silver mosquito 11: Push rod 12: Front wheel
13: Rear wheel 14: Front leg 15: Rear leg
20: Lower part 21: Upper part 22: Stopper
23: Holding part 24: Protrusion 25: Holding cylinder
26: Cover member 30: Braking device 31: Braking lever
32: Pedestal 33: Control stick 35: Actuating piece
36: Spring 37: Braking piece 38: Swing part
39: Traversing part 40, 42: Hole 45: Connection member
46: Through hole 47: Open hole 48: Upper protrusion
49: Side opening hole 50: Tubular side protrusion 51: Pin through hole
52: Tubular side projection 53, 54: Hole 60: Traversing member
61: Fixing means 62: Armrest lever 64: Cover member
65: connecting member 66: opening 67: box
68: Cylindrical body 69, 70: Hole 74: Pivoting lever
75: Connection means 76: Seat pipe 78: Holding means
79: Hole 80: Fixing means 81: Hole
85: Pull-in lever 87: Closure plug 88: Pivoting connection lever
91: Rear leg folding lever 93: Front leg folding lever 96: Hook
97: Flange 98: Groove 99: Lock pin
100: Wheel holder 101: Fixed part 102: Rotating part
105: Traversing member 106: Projection 107: Hook member
110: Stop device 111: Oscillating piece 112: Depressing piece
113: Oscillating member 114: Stop rod 115: Spring
116, 117: hole 118: long groove 119: pivoting means
120, 121: Lever 122: Connection lever 130: Rear axle

Claims (2)

Silver having a front leg 14 having a front wheel 12 at the lower end, a rear leg 15 connected to the front leg 14 so as to be pivotable (84) and having a rear wheel 13 at the lower end, and a push bar 11. In mosquitoes
The push rod 11 and the upper end of the rear leg 15 are connected to each other by an armrest lever 62 so as to be pivotable (55, 71). One end of a pivot lever 74 and a pivot coupling lever 88 is pivotally attached to the push rod 11 (75, 89). The end of the seat pipe 76 is pivotally attached (77) to the other end of the pivot lever 74, and one end of the rear leg folding lever 91 is pivotally attached to the end of the pivot coupling lever 88 (see FIG. 90), one end of a front leg folding lever 93 is pivoted (94) to the other end of the rear leg folding lever 91, and the other end of the front leg folding lever 93 is pivoted (92) to the front leg 14. The upper end of the front leg 14 is pivotally attached (82) to the part pipe 76, and further, the seat pipe 76 is provided between the pivot (82) position of the front leg 14 and the pivot (77) position of the pivot lever 74. In FIG. 1, one end of the pull-in lever 85 is pivotally attached (86). Silver mosquitoes and the other end of the lever 85 is pivoted to the rear leg fold lever 91 (95). At least the push bar 11, the armrest lever 62, the rear leg 15, the pivot connecting lever 88, the rear leg 15, the rear leg folding lever 91, the front leg 14, and the front leg folding lever 93 form a four-bar rotation chain. The silver mosquito according to claim 1 .

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