Hand bike

Abstract

The present invention relates to a hand bike which can be driven by a driver and a passenger in a cargo portion by respectively rotating pedals. The present invention comprises: a bike portion comprising a frame portion, a saddle portion provided on the frame portion so that a driver can be seated thereon, a main wheel portion which is rotatably provided on the lower portion of the frame portion and is driven, and a main pedal portion which is rotatably provided on the frame portion and is connected to the main wheel portion to rotate a main wheel; a cargo portion which is rotatably connected to the bike portion and comprises an accommodation space formed therein, a door portion installed to be opened / closed, auxiliary wheel portions provided on both sides of the cargo portion, and a handle portion for adjusting a driving direction; and a hand crank assembly which is detachably installed on the cargo portion and connected to the auxiliary wheel portions to drive the auxiliary wheel portions.

Description

hand bike

[0001] The present invention relates to a hand bike, and more particularly, to a hand bike that can be driven by a bike rider and a cargo passenger each turning pedals.

[0002]

[0003] Typically, a bicycle is installed with the front and rear wheels connected between horizontal and vertical supports, and the rear wheel and the rotating shaft connected to the chain are symmetrically installed with pedal links that can be turned by stepping on them, and the steering handle, the user's saddle, and, if necessary, an auxiliary saddle, a luggage rack, etc. are installed.

[0004] However, bicycles developed so far have been for normal people who pedal with their legs and steer by turning the handlebars with their hands.

[0005] Therefore, when people with disabilities, especially those with leg impairments, want to ride these bicycles, they have difficulty maintaining balance, making riding difficult. In addition, if they ride too forcefully, the risk of safety accidents increases.

[0006] Korean Patent Publication No. 10-2009-0014429 describes a conventional wheelchair-mounted tricycle.

[0007] However, the conventional technology had the problem that it was difficult to use when going up steep slopes or driving on unpaved roads because the rider had to pedal by hand, which required a lot of strength and quickly exhausted the rider's stamina.

[0008] In addition, there was a problem that it was difficult for people with physical or developmental disabilities or those with mental or physical disabilities to drive the vehicle by themselves when a motor was installed on the driving wheel.

[0009]

[0010] In order to solve the above-described problem, a cargo bike is proposed in Korean Patent Publication No. 10-2023-0086472 in which a rider, including a disabled person, sits on the cargo section and rotates the pedal section while the driver sits on the saddle and pedals with his or her feet.

[0011] However, there was a problem that the sub-pedal section, which generates power by the rider rotating the pedal section, was formed independently on each side of the cargo section, requiring a lot of force from the rider, such as the disabled, and that when the bike moves backward, the sub-pedal section connected to the wheel section could rotate in reverse, causing the rider's face to hit the sub-pedal section, which could result in a safety accident.

[0012] In addition, there was a problem that it was difficult to load a wheelchair into the cargo compartment through the gate when the cargo compartment gate was opened because the height between the cargo compartment floor and the ground was considerable.

[0013] Accordingly, there is a demand for a bike that can easily accommodate a wheelchair in the cargo compartment and prevent safety accidents for cargo passengers.

[0014]

[0015] [Prior Art Literature]

[0016] [Patent Document]

[0017] (Patent Document 1) Republic of Korea Publication No. 10-2009-0014429

[0018] (Patent Document 2) Republic of Korea Publication No. 10-2023-0086472

[0019]

[0020] The present invention is intended to solve the above-mentioned problems, and aims to provide a hand bike in which a driver and a cargo passenger can independently generate power and ride using pedals.

[0021] And, the present invention aims to provide a hand bike in which a hand crank assembly that is connected to an auxiliary wheel of a cargo section and generates power is detachably installed in the cargo section, the auxiliary wheel and the hand crank assembly are releasably connected, so that a wheelchair can be easily loaded into the cargo section, and the front door of the cargo section is double-folded so that a gentle slope can be formed between the floor surface of the cargo section and the ground.

[0022] In addition, the technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0023]

[0024] In order to achieve the above-described object, the present invention provides a hand bike comprising: a bike part including a frame part, a saddle part provided on an upper portion of the frame part for a rider to sit on, a main wheel part rotatably provided on a lower portion of the frame part for driving, and a main pedal part rotatably provided on the frame part and connected to the main wheel part to rotate the main wheel; a cargo part rotatably connected to the bike part, including a storage space provided inside, a door part installed so as to be openable and closable, auxiliary wheels provided on both sides, and a handle part for adjusting the driving direction; and a hand crank assembly detachably installed on the cargo part, connected to the auxiliary wheels, and driving the auxiliary wheels.

[0025] In one embodiment, a hand crank assembly may include a hand crank unit that provides power to a cargo unit, including a drive shaft unit, a hand chain wheel rotatably installed on the inside of the drive shaft unit along the same axis, and handle pedals that are respectively connected to both sides of the hand chain wheel and rotate the hand chain wheel; a drive unit that transmits power from the hand crank unit to an auxiliary wheel unit, including a differential device, a first drive chain wheel that is rotatably connected to one side of the differential device along the same axis and is rotatably connected to the hand chain wheel by a first drive chain, a drive shaft that is respectively connected to both sides of the differential device and rotates in conjunction with the first drive chain wheel, and a second drive chain wheel that is detachably provided at an end of each drive shaft in a direction opposite to the differential device; and a connecting support unit that connects the hand crank unit and the drive unit, the connecting support unit including a support shaft that has one end connected to a lower end of the drive shaft unit of the hand crank unit, and a support frame that is installed at the other end of the support shaft.

[0026] In another embodiment, the drive shaft includes a first rotation shaft that moves toward the differential and rotates in conjunction with the first drive chain, a second rotation shaft that is provided at a predetermined distance from the first rotation shaft, and a connecting shaft that is provided at opposite ends of the first rotation shaft and the second rotation shaft and that is interlocked, and a stepped portion is formed at a predetermined portion of the opposite ends of the first rotation shaft and the second rotation shaft so as to be smaller in diameter than the remaining portion, and a moving shaft is provided at a portion of the first rotation shaft having a smaller diameter, and the moving shaft is disposed between the stepped portion of the first rotation shaft and the connecting shaft, and a moving groove is formed in the longitudinal direction of the second rotation shaft on an outer periphery of a portion of the second rotation shaft having a smaller diameter, and a moving pin that is movable on the moving groove is protruded on an inner periphery of the connecting shaft, and the connecting shaft can be fixedly connected to the portion of the first rotation shaft having a smaller diameter by a pin.

[0027] In a specific embodiment, the drive shaft may further include a link member for establishing or releasing a connection between the first rotating shaft and the differential, wherein the support shaft includes a vertical slot formed in the longitudinal direction and a link pin movably protruding from the vertical slot, and the link member may include a first link member having one end connected to the link pin, a second link member symmetrically arranged with respect to the first link member and having one end connected to the link pin, a third link member having one end connected to the other end of the first link member and the other end connected to a moving pin of one drive shaft, a fourth link member having one end connected to the other end of the second link member and the other end connected to a moving pin of another drive shaft, and a fifth link member connecting the centers of the third link member and the fourth link member.

[0028] In one embodiment, each drive shaft further includes a flange protrudingly formed on an outer periphery of an end opposite to the differential, and the cargo section further includes a hand crank connection assembly for detachably installing the flange on the outer sides of both sides, the flange including a plurality of fixing holes formed circumferentially at regular intervals on the edge side, and fixing pieces protrudingly formed on each of the two sides adjacent to the fixing holes, and the hand crank connection assembly may include a connection body installed on the outer sides of both sides of the cargo section, a flange groove formed in the center of the upper side of the connection body in the driving direction of the cargo section, into which the flange is inserted and rotatably installed, and a fixing groove formed on the outer side of the flange groove, wherein an inlet is formed on one side, and a stepped portion is formed toward the center of the remaining portion excluding the inlet, into which the fixing piece is inserted and rotatably fixed.

[0029]

[0030] As described above, the present invention having the above configuration has the effect of ensuring sufficient power required for driving even if the weight increases compared to a regular bicycle, as the driver and cargo passenger can each independently generate power.

[0031] In addition, the hand crank assembly that is connected to the auxiliary wheels of the cargo compartment and generates power is detachably installed on the cargo compartment, making it easy to load a wheelchair onto the cargo compartment, and enabling safe and stable movement while carrying a passenger and a wheelchair on the cargo compartment.

[0032] In addition, the connection between the auxiliary wheel and the hand crank assembly is made detachable, thereby preventing a safety accident that may occur to the passenger due to the rotation of the handle pedal by the operation of the hand crank assembly when moving backward, and the front door of the cargo compartment is double-folded, thereby forming a gentle slope between the cargo compartment floor and the ground, thereby making it easy to board a wheelchair inside the cargo compartment.

[0033] In addition, the effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0034]

[0035] Figure 1 is a perspective view showing a hand bike according to the present invention.

[0036] Figure 2 is an exploded perspective view showing the hand crank assembly separated from the cargo section of the hand bike according to the present invention.

[0037] FIG. 3 is an enlarged perspective view of a hand crank assembly of a hand bike according to the present invention.

[0038] Figures 4 and 5 are drawings showing a door section and an appearance of the door section being opened in the cargo section of a hand bike according to the present invention.

[0039] FIG. 6 and FIG. 7 are drawings showing the process of coupling and decoupling the drive shaft of the drive unit and the differential device in the hand crank assembly of the hand bike according to the present invention.

[0040] FIG. 8 and FIG. 9 are drawings showing the process of coupling and decoupling the drive shaft of the drive unit and the differential device by the link member in the hand crank assembly of the hand bike according to the present invention.

[0041] Fig. 10 is a drawing showing the hand crank assembly of a hand bike according to the present invention and the hand crank connection assembly of a cargo section being combined.

[0042] Fig. 11 is an exploded perspective view showing the first fixing lever of the hand crank connection assembly of a hand bike according to the present invention.

[0043] Fig. 12 is a drawing showing a drive shaft and a second drive chain wheel in a drive unit of a hand crank assembly according to the present invention.

[0044] FIG. 13 is a drawing showing a state in which a second drive chain wheel separated from a drive shaft is stored in a drive unit of a hand crank assembly according to the present invention.

[0045]

[0046] [Explanation of symbols]

[0047] 1: Hand bike

[0048] 3: Wheelchair 100: Bike

[0049] 110: Frame 120: Saddle

[0050] 130: Main wheel section 131: Main wheel

[0051] 133: Main gear wheel 140: Main pedal section

[0052] 141: Main chain wheel 141a: Main chain

[0053] 143: Main pedal 150: Handlebar

[0054] 160: Auxiliary power unit 300: Cargo unit

[0055] 301: Reception space 303: Perimeter

[0056] 310: Door section 311: First door

[0057] 311a, 311b: Door plate 312: First hinge

[0058] 313: Second door 313a, 313b: Door plate

[0059] 314: Second Hinge 315 Connection

[0060] 316: Support frame 316a: Connecting rod

[0061] 316b: Support bar 320: Handle

[0062] 330: Connecting frame 350: Auxiliary wheel part

[0063] 351: Auxiliary wheel 353: Auxiliary gear wheel

[0064] 360: Locking part 361: Fixed pin

[0065] 363: Locking device 363a: Locking bracket

[0066] 363b: Locking ring 370: Storage compartment

[0067] 371: Fixing pin 380: Lighting unit

[0068] 500: Hand crank assembly 510: Hand crank section

[0069] 511: Drive shaft 513: Hand chain wheel

[0070] 515: Handle pedal 517: Mid-motor

[0071] 530: Drive unit 531: Differential device

[0072] 531a: Fastening groove 532: First drive chain wheel

[0073] 532a: First drive chain 533: Drive shaft

[0074] 533a: First rotating shaft 533b: Second rotating shaft

[0075] 533b1: Moving Home 533b2: Installation Home

[0076] 533c: Connecting shaft 533c1: Connecting hole

[0077] 533c2: Pin 533c3: Moving

[0078] 533d: Moving shaft 533d1: Moving pin

[0079] 533e: Movement slot 534: Step section

[0080] 535: Second drive chain wheel 535a: Installation hole

[0081] 535b: Cover 535b1: Storage

[0082] 535b2: Storage pin 535b3: Storage groove

[0083] 537: Second drive chain 538: Flange

[0084] 538a: Fixed hole 538b: Fixed piece

[0085] 550: Connecting support 551: Support shaft

[0086] 551a: Vertical slot 551b: Link pin

[0087] 553: Support frame 553a: Horizontal support

[0088] 533b: Vertical support 533b1: Through hole

[0089] 560: Hand crank connection assembly 561: Connection body

[0090] 563: Flange groove 565: Fixed groove

[0091] 565a: Entrance 565b: Step

[0092] 570: Link member 571: First link member

[0093] 573: Second link member 575: Third link member

[0094] 577: 4th link member 579: 5th link member

[0095] 580: First fixed lever 581: First lever body

[0096] 581a: Moving hole 581b: Cutting part

[0097] 583: First lever pin 585: Pin handle

[0098] 587: Pressurizing member 590: Second fixing lever

[0099] 591: Second lever body 593: Second lever pin

[0100] 597: Pull ring

[0101]

[0102] The present invention provides a hand bike including a bike part including a frame part, a saddle part provided on an upper portion of the frame part for a rider to sit on, a main wheel part provided rotatably on a lower portion of the frame part for driving, and a main pedal part rotatably provided on the frame part and connected to the main wheel part to rotate the main wheel; a cargo part including a storage space provided inside, a door part installed so as to be openable and closable, auxiliary wheels provided on each side, and a handle part for adjusting a driving direction; and a hand crank assembly detachably installed on the cargo part and connected to the auxiliary wheels to drive the auxiliary wheels.

[0103]

[0104] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Furthermore, these embodiments are not intended to limit the scope of the present invention, but rather are presented merely as examples. Various modifications are possible without departing from the technical scope thereof.

[0105] The present invention can have various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail.

[0106] However, this is not intended to limit the present invention to a specific embodiment, and it should be understood that all modifications, equivalents, and alternatives included within the spirit and technical scope of the present invention are included. Similar reference numerals have been used to designate similar components throughout the description of each drawing.

[0107] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0108] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0109] Since the driving structure of the hand bike according to the present invention is the same as that of a conventional bicycle or bike, the gears, chain, and driving structure will be briefly described below.

[0110] FIG. 1 is a perspective view showing a hand bike according to the present invention. FIG. 2 is an exploded perspective view showing a hand crank assembly separated from a cargo section of a hand bike according to the present invention. FIG. 3 is an enlarged perspective view showing a hand crank assembly of a hand bike according to the present invention. FIG. 4 and FIG. 5 are views showing a door section and an opening section of a cargo section of a hand bike according to the present invention. FIG. 6 and FIG. 7 are views showing a process of coupling and decoupling a drive shaft of a drive unit and a differential device in a hand crank assembly of a hand bike according to the present invention. FIG. 8 and FIG. 9 are views showing a process of coupling and decoupling a drive shaft of a drive unit and a differential device by a link member in a hand crank assembly of a hand bike according to the present invention. FIG. 10 is a view showing a process of coupling a hand crank assembly of a hand bike according to the present invention and a hand crank connection assembly of a cargo section. FIG. 11 is an exploded perspective view showing a first fixing lever of a hand crank connection assembly of a hand bike according to the present invention. Fig. 12 is a drawing showing a drive shaft and a second drive chain wheel in the drive section of a hand crank assembly according to the present invention. Fig. 13 is a drawing showing a second drive chain wheel separated from the drive shaft being stored in the drive section of a hand crank assembly according to the present invention.

[0111] As shown in the drawing, the hand bike (1) according to the present invention can be configured to include a bike section (100), a cargo section (300), and a hand crank assembly (500).

[0112] The above bike part (100) is for a driver to ride and ride a hand bike (1), and may be configured to include a frame part (110), a saddle part (120), a main wheel part (130), and a main pedal part (140).

[0113] The above frame part (110) forms the skeleton of the hand bike (1) according to the present invention, and can connect the saddle part (120), the main wheel part (130), and the main pedal part (150) to each other.

[0114] The above saddle part (120) is provided on the upper part of the frame part (110) so that the driver can sit on it.

[0115] The above saddle (120) may be formed of a metal, wood, or plastic material, or may be provided with a cushion for the driver by installing a rubber, sponge, silicone, or synthetic resin material on top of a metal, wood, or plastic material.

[0116] The above frame portion (110) may further include an auxiliary saddle (not shown) at the rear of the saddle portion (120).

[0117] The above main wheel part (130) is provided at the lower part of the frame part (110) and can be configured to drive the bike part (100) by the driver's operation.

[0118] For this purpose, the main wheel part (130) may include a main wheel (131) and a main gear wheel (133) installed on the main wheel (131).

[0119] The above main gear wheel (133) may include a plurality of gear assemblies (not shown).

[0120] The above main pedal part (140) may include a main chain wheel (141), and a pair of main pedals (143) that extend in opposite directions from the center of both sides of the main chain wheel (141) and are formed symmetrically with respect to the main chain wheel (141).

[0121] The above pair of main pedals (143) can have their ends bent to opposite sides.

[0122] Here, the outer periphery of the main chain wheel (141) and the main gear wheel (133) can be formed in a gear shape, and the main chain wheel (141) of the main pedal unit (140) can be connected to the main gear wheel (133) of the main wheel unit (130) and the main chain (141a).

[0123] Accordingly, when the driver rotates a pair of main pedals (143) to apply rotational force to the main chain wheel (141), the rotational force of the main chain wheel (141) is transmitted to the main gear wheel (133) through the main chain (141a), and the main gear wheel (133) transmits rotational force to the gear-engaged main wheel (131), so that the hand bike (1) can run.

[0124] Meanwhile, the main wheel unit (140) may further include an auxiliary power unit (160) for transmitting power to the main wheel unit (140).

[0125] The above auxiliary power unit (160) may be an electric motor, a hub motor, or a mid drive. When the auxiliary power unit (160) is an electric motor, a hub motor, or a mid drive, the main wheel unit (140) can be rotated and driven only by the power of the auxiliary power unit (160) through the driver's operation.

[0126] Here, the auxiliary power unit (160) may be a PAS (Pedal Assist System), and when the auxiliary power unit (160) is a PAS, when the driver rotates the main pedal unit (140) with less force, the PAS generates power to rotate the main wheel unit (140) with a force greater than that of the driver, thereby driving the hand bike (1).

[0127] The above cargo section (300) is intended to be used to load a wheelchair for the disabled (3) etc. inside, and can be formed in a box shape with an open top.

[0128] The cargo section (300) includes a bottom surface (not shown) and a peripheral section (303) that stands vertically from the edge of the bottom surface and wraps around the circumference, and an upper open receiving space (301) can be formed inside the bottom surface and the peripheral section (303) so as to wrap around it.

[0129] Here, the periphery (303) of the cargo section (300) can be formed in a form in which the height gradually increases from the side section to the rear section, and preferably, the height of the rear section of the cargo section (300) can be formed higher than the height of the side section of the cargo section (300).

[0130] Accordingly, the cargo compartment (300) can accommodate passengers, such as a wheelchair (3) and a disabled person riding the wheelchair (3), in the accommodation space (301), and the upper body of the passenger can be exposed to the outside through the open top of the accommodation space (301).

[0131] The above cargo section (300) may include a door section (310) for entering and exiting a wheelchair (3) on the front side facing the driving direction, a handle section (320) for adjusting the driving direction of a hand bike (1), a connecting frame (330) for connecting the cargo section (300) and the bike section (100) on the bottom surface of the rear side opposite to the door section (310), and auxiliary wheel sections (350) provided on the outer sides of both sides of the circumference section (303).

[0132] The above door section (310) can open and close the front of the cargo section (300).

[0133] Accordingly, when the door part (310) is opened, the wheelchair (3) can be brought in and out of the receiving space (301) inside the cargo part (300), and when the wheelchair (3) is brought in and out, the door part (310) can be closed, so that when the hand bike (1) according to the present invention is shaken by an obstacle or the like while driving, a safety accident such as the wheelchair (3) mounted in the receiving space (301) of the cargo part (300) being detached to the outside of the cargo part (300) or being thrown out can be blocked and prevented.

[0134] Here, the door part (310) may be installed to be inclined to the front of the cargo part (300). Specifically, the door part (310) may be formed in a shape in which, when closed, the lower part is inclined toward the driving direction of the hand bike (1), and the upper part is inclined toward the bike part (100) provided at the rear part of the cargo part (300) in the opposite direction to the driving direction.

[0135] That is, by installing the door part (310) at an angle to the front of the cargo part (300) to minimize air resistance generated in the direction facing while driving, air or wind flows from the bottom to the top along the door part (310) that is installed at an angle, and by providing an effect of the door part (310) of the cargo part (300) being laid down toward the driving direction of the hand bike (1) by the flow of air or wind, the driving speed of the hand bike (1) can be increased.

[0136] Meanwhile, referring to FIGS. 4 and 5, the door section (310) may include a first door (311) that is rotatably connected at one end to the front bottom surface of the cargo section (300) by a first hinge (312), and a second door (313) that is rotatably connected at the other end of the first door (311) by a second hinge (314).

[0137] The first door (311) and the second door (313) are provided so as to be rotatable about their respective hinges (312, 314), but the first door (311) and the second door (313) can be foldable.

[0138] In addition, the first door (311) and the second door (313) may include a pair of door plates (311a, 311b, 313a, 313b) spaced apart at a certain distance in the width direction of the cargo section (300) so that the wheels of the wheelchair (3) can easily move, and at least one connecting piece (315) provided between the door plates.

[0139] Each of the above door plates (311a, 311b, 313a, 313b) can form an inclined surface for the wheels of the wheelchair (3) to move when the door part (310) is opened.

[0140] Accordingly, when the door part (310) is open at the front of the cargo part (300), the first door (311) connected to the bottom part of the cargo part (300) by the first hinge (312) is turned toward the driving direction of the cargo part (300) to form an inclined surface at a certain angle, and then the wheelchair (3) can be moved along the inclined surface to be loaded into the receiving space (301) of the cargo part (300).

[0141] If the space between the cargo compartment (300) and the wheelchair (3) is narrow, it is preferable to form a slope for the wheelchair (3) to move by turning only the first door (311), but this is not limited thereto.

[0142] In addition, by rotating the first door (311) connected to the bottom of the cargo section (300) by the first hinge (312) toward the direction of travel of the cargo section (300), an inclined surface having a certain angle can be formed, and by rotating the second door (313) connected to the first door (311) by the second hinge (314) toward the direction of travel of the cargo section (300), an inclined surface having a gentler angle of inclination than an inclined surface formed by rotating only the first door (311) can be formed.

[0143] In this way, the first door (311) and the second door (313) can serve as a support for the wheelchair (3) to move when opened to load the wheelchair (3) into the receiving space (301) of the cargo compartment (300).

[0144] Accordingly, the wheelchair (3) can be moved to the receiving space (301) of the cargo section (300) by utilizing the inclined surface of the first door (311) in a state where the first door (311) and the second door (313) are folded, or the wheelchair (3) can be moved to the receiving space (301) of the cargo section (300) by utilizing the inclined surfaces of the first door (311) and the second door (313) in a state where both the first door (311) and the second door (313) are rotated and unfolded.

[0145] Here, the first door (311) may have at least one support frame (316) protrudingly formed on one side that is positioned close to the ground when opened.

[0146] Preferably, the support frame (316) can be placed on the front and rear sides of one side of the first door (311) with respect to the driving direction.

[0147] Specifically, the support frame (316) may be formed in an approximately “U” shape by integrally forming connecting rods (316a) connected to both sides of one side of the first door (311) and support rods (316b) connecting the connecting rods (316a).

[0148] At this time, the length of the connecting rod (316a) of the supporting frame (316) formed on one side of the first door (311) that is close to the lower part of the front part of the cargo part (300) may be formed longer than the length of the connecting rod (316a) of the supporting frame (316) that is located farther from the lower part of the front part of the cargo part (300).

[0149] Accordingly, the first door (311) can form a slope that is inclined at a certain angle with respect to the ground when opened by each of the above support frames.

[0150] Meanwhile, it is preferable that at least one protrusion (not shown) made of synthetic resin material be formed protrudingly on one side of the support bar (316b) that comes into contact with the ground when opened to prevent slipping and movement of the door part (310) when in contact with the ground, but this is not limited thereto.

[0151] Accordingly, by utilizing the slope of the door section (310), the wheelchair (3) can be safely and easily brought into the receiving space (301) of the cargo section (300), or the wheelchair (3) loaded in the receiving space (301) of the cargo section (300) can be safely and easily taken out of the cargo section (300).

[0152] In addition, by closing the door (310), movement of the wheelchair (3) and detachment of the loaded wheelchair (3) can be prevented, thereby preventing safety accidents.

[0153] Here, a locking part (360) may be included to secure the door part (310) to the cargo part (300) while the door part (310) installed on the front of the cargo part (300) is closed to close the receiving space (301).

[0154] Specifically, the locking part (360) may include a fixing pin (361) that protrudes outward on each side of the first door (311) and a locking device (363) that is installed on the outer side of each side of the cargo part (300).

[0155] The above locking device (363) may include a locking bracket (363a) formed in a roughly “ㄷ” shape, a locking ring (363b) formed in a hook shape and rotatably formed on the locking bracket (363a), and a tension member (not shown) that presses the locking ring (363b).

[0156] Accordingly, when closing and locking the door part (310), the driver applies force to the lock ring (363b) to rotate it, opens the entrance side of the lock bracket (363a), inserts the fixing pins (361) that are protruded on both sides of the first door (311) into the entrance side of the lock bracket (363a), and after insertion, releases the force applied to the lock ring (363b), so that the lock ring (363b) rotates by the tension member to close the entrance side of the lock bracket (363a), thereby fixing the door part (310) to the cargo part (300).

[0157] Meanwhile, a pressure piece (not shown) in the form of a handle may be protruded from the lock ring (363b) to open the entrance side of the lock bracket (363a) by the driver turning the lock ring (363b) by hand.

[0158] The above handle part (320) is installed at the upper center of the circumference part (303) formed at the rear part of the circumference part (303) of the cargo part (300) so that the driver can adjust the driving direction.

[0159] The handle part (320) can be turned left and right by the driver's hand, and the driving direction of the hand bike (1) can be controlled by turning and adjusting the cargo part (300) on which the handle part (320) is fixedly installed.

[0160] At this time, the handle portion (320) may be formed with a grip portion (not shown) extended to both sides so that the driver can hold it with his hand and turn it left and right to adjust it.

[0161] The above connecting frame (330) is for connecting the cargo section (300) and the bike section (100), and one end is connected to the bottom surface of the rear section opposite the front section of the cargo section (300), and the other end can be connected to the frame section (110) of the bike section (100).

[0162] Here, the cargo section (300) can be connected to the end of the connecting frame (330) by a rotating shaft (not shown) so that it can rotate in both directions.

[0163] Accordingly, when the driver holds the handle (320) with his hand and turns it left and right, the cargo part (300) turns and can take charge of steering the hand bike (1).

[0164] The above auxiliary wheel part (350) can be used for driving the cargo part (300) to assist driving the hand bike (1).

[0165] Specifically, the auxiliary wheel unit (350) may include a pair of auxiliary wheels (351) each provided on the outer side of both sides of the periphery (303) of the cargo unit (300) and an auxiliary gear wheel (353) installed on the same axis at the center of each auxiliary wheel (351).

[0166] Here, the pair of auxiliary wheels (351) can be driven by the operation of a passenger riding in the cargo section (300), and for this purpose, the auxiliary wheel section (350) can be connected to a hand crank assembly (500).

[0167] Meanwhile, the cargo section (300) may further include at least one lighting section (380) for irradiating light to the outer side of both sides of the periphery section (303).

[0168] The lighting unit (380) may be an electric lighting device, etc., and irradiates light in the direction of travel when the hand bike (1) is being driven, so that the hand bike can be driven while securing visibility even in dark situations without light or situations where visibility is difficult to secure due to fog, etc.

[0169] The above hand crank assembly (500) is for providing power to the auxiliary wheel section (350) of the cargo section (300) by using the hands of a passenger of a wheelchair (3) mounted in the receiving space (301) of the cargo section (300).

[0170] To this end, the hand crank assembly (500) is connected to a pair of auxiliary wheels (351) provided on both sides of the cargo section (300) and can drive each of the pair of auxiliary wheels (351).

[0171] Specifically, the hand crank assembly (500) may include a hand crank part (510) to which a passenger provides power, a driving part (530) that transmits the power of the hand crank part (510) to an auxiliary wheel part (350) of a cargo part (300), and a connecting support part (550) that connects the hand crank part (510) and the driving part (530).

[0172] The above hand crank part (510) is for driving the cargo part (300) by the operation of a passenger who rides with a wheelchair (3) in the receiving space (301) of the cargo part (300), and may include a drive shaft part (511), a hand chain wheel (513) rotatably installed on the inside of the drive shaft part (511), and a handle pedal (515) that is connected to each of both sides of the hand chain wheel (513) and rotates the hand chain wheel (513).

[0173] Here, the handle pedals (515) are arranged as a pair at the center of both sides of the hand chain wheel (513), and may be formed to be bent to rotate the hand chain wheel (513). Accordingly, the hand chain wheel (513) can be operated by rotating a pair of handle pedals (515) simultaneously, or by rotating one of the handle pedals (515).

[0174] The above driving unit (530) may include a differential device (531), a first driving chain wheel (532) that is connected to one side of the differential device (531) on the same axis but is rotatably connected to a hand chain wheel (513) of a hand crank unit (510) by a first driving chain (532a), a driving shaft (533) that is connected to each of both sides of the differential device (531) and rotates in conjunction with the first driving chain wheel (532), and a second driving chain wheel (535) that is detachably provided at the end of each driving shaft (533) in the direction opposite to the differential device (531).

[0175] Each of the above drive shafts (533) is a cylindrical body and can be installed symmetrically on both sides of the differential device (531).

[0176] Each drive shaft (533) may include a first rotation shaft (533a) that is provided inside the drive shaft (533) and moves horizontally toward the differential device (531) and rotates in conjunction with the first drive chain (532a), a second rotation shaft (533b) that is provided at a predetermined distance from the first rotation shaft (533a), and a connecting shaft (533c) that is installed at both ends where the first rotation shaft (533a) and the second rotation shaft (533b) face each other and connects the first rotation shaft (533a) and the second rotation shaft (533b).

[0177] Here, a fastening groove (531a) for fastening a first rotation shaft (533a) may be formed at the center of both sides of the differential device (531), and the inner circumference of the fastening groove (531a) and the outer circumference of the end of the first rotation shaft (533a) to be fastened to the fastening groove (531a) may be formed in the form of a screw or a tooth.

[0178] In one embodiment of the present invention, a screw portion is formed on the outer periphery of the end of the first rotary shaft (533a) and the inner periphery of the fastening groove (531a) of the differential device (531) or is formed in a sawtooth shape so that the first rotary shaft (533a) is fastened to the fastening groove (531a). However, as long as the first rotary shaft (533a) can be easily coupled and decoupled from the fastening groove (531a) of the differential device (531), the present invention is not limited thereto and can be variously modified.

[0179] The first rotation shaft (533a) and the second rotation shaft (533b) may have a stepped portion (534) formed so that a certain portion of the facing ends is smaller in diameter than the remaining portion.

[0180] Meanwhile, the inner diameter of the connecting shaft (533c) may be the same as the diameter of a portion having a small diameter in the first rotating shaft (533a) and the second rotating shaft (533b), and the outer diameter of the connecting shaft (533c) may be the same as the diameter of a portion having a large diameter in the first rotating shaft (533a) and the second rotating shaft (533b).

[0181] Accordingly, the above connecting shaft (533c) can be combined in a form that surrounds the small diameter portion of the first rotation shaft (533a) and the second rotation shaft (533b).

[0182] To this end, the connecting shaft (533c) may have a connecting hole (533c1) formed in the center, and a small-diameter portion of the first rotation shaft (533a) may be coupled to one side of the connecting hole (533c1), and a small-diameter portion of the second rotation shaft (533b) may be coupled to the other side.

[0183] In another embodiment, the connecting shaft (533c) may have connecting grooves (not shown) formed at the center of both sides, and a small-diameter portion of the first rotation shaft (533a) may be coupled to one of the connecting grooves, and a small-diameter portion of the second rotation shaft (533b) may be coupled to the other connecting groove.

[0184] Here, the connecting shaft (533c) can be fixedly connected to a small diameter portion of the first rotary shaft (533a) with a pin (533c2).

[0185] Meanwhile, when the hand bike (1) moves backward, a safety accident may occur, such as the rider's face hitting the handle pedal (515) due to the reverse rotation of the handle pedal (515) connected to the auxiliary wheel (351).

[0186] Accordingly, the power supplied to the first drive chain wheel (532) through the drive shaft (533) according to the rotation of the auxiliary wheel (351) should be blocked to prevent a safety accident that may occur due to the reverse rotation of the handle pedal (515) when the hand bike (1) moves backward.

[0187] To this end, the connection of the first rotating shaft (533a) connected to the differential device (531) and the first drive chain wheel (532) connected to the differential device (531) to rotate and transmit power to the auxiliary wheel (351) must be disconnected.

[0188] Specifically, referring to FIGS. 6 and 7, a moving shaft (533d) may be provided on a portion having a small diameter of the first rotating shaft (533a), and a moving pin (533d1) may be formed protrudingly on the outer periphery of the moving shaft (533d).

[0189] Here, the inner diameter of the moving shaft (533d) can be formed to correspond to a portion having a smaller diameter in the first rotating shaft (533a).

[0190] At this time, the moving shaft (533d) can be arranged so that its side is in contact with the step portion (534) formed on the first rotation shaft (533a), and when the moving shaft (533d) moves according to the movement of the moving pin (533d1), the side of the moving shaft (533d) presses the step portion (534) of the first rotation shaft (533a), so that the first rotation shaft (533a) can move toward the differential device (531) and the first drive chain wheel (532).

[0191] Meanwhile, a long moving groove (533b1) may be formed in the longitudinal direction of the second rotating shaft (533b) on the outer circumference of the small diameter portion of the second rotating shaft (533b), and a moving piece (533c3) that can move within the moving groove (533b1) may be protruded and formed on the inner circumference of the connecting shaft (533c).

[0192] In this way, when the moving pin (533d1) moves in the direction toward the differential device (531), the first rotation shaft (533a) and the moving shaft (533d) move toward the differential device (531), and the moving piece (533c3) moves on the moving groove (533b1), so that the distance between the end of the first rotation shaft (533a) and the end of the second rotation shaft (533b) can increase.

[0193] That is, as the moving pin (533d1) moves horizontally toward the differential device (531), the moving shaft (533d) on which the moving pin (533d1) is installed moves horizontally, and when the moving shaft (533d) moves horizontally toward the differential device (531), one side of the moving shaft (533d) comes into contact with the step (534) and pushes, causing the first rotation shaft (533a) and the connecting shaft (533c) to move toward the fastening groove (531a) of the differential device (531), and as the part with a smaller diameter of the first rotation shaft (533a) moves away from the part with a smaller diameter of the second rotation shaft (533b), the end of the first rotation shaft (533a) can be coupled to the fastening groove (531a) of the differential device (531).

[0194] And, when the moving pin (533d1) moves away from the differential device (531), the first rotation shaft (533a) and the moving shaft (533d) move away from the differential device (531), and the moving piece (533c3) moves on the moving groove (533b1), so that the distance between the end of the first rotation shaft (533a) and the end of the second rotation shaft (533b) can become closer.

[0195] That is, as the moving pin (533d1) moves horizontally away from the differential device (531), the moving shaft (533d) on which the moving pin (533d1) is installed moves horizontally, and when the moving shaft (533d) moves horizontally away from the differential device (531), the other side of the moving shaft (533d) comes into contact with the side of the connecting shaft (533c) and pushes, causing the first rotation shaft (533a) and the connecting shaft (533c) to move away from the differential device (531), and as the part with a smaller diameter in the first rotation shaft (533a) moves closer to the part with a smaller diameter in the second rotation shaft (533b), the end of the first rotation shaft (533a) can be separated from the fastening groove (531a) of the differential device (531).

[0196] At this time, when the connecting shaft (533c) moves, the moving piece (533c3) of the connecting shaft (533c) can move on the moving groove (533b1) of the second rotary shaft (533b).

[0197] Accordingly, according to the present invention, the hand crank assembly (50) of the hand bike (1) is formed with a structure in which a first rotation shaft (533a) connected to a differential device (531) and a first drive chain wheel (532) to transmit power to an auxiliary wheel (351) moves relative to the differential device (531), so that when moving backward, the first rotation shaft (533a) can move to disengage the differential device (531).

[0198] Meanwhile, the moving pin (533d1) may protrude to a certain extent outside the drive shaft (533) so that the passenger or driver of the cargo section (300) can easily operate it. To this end, a moving slot (533e) may be formed longitudinally through one outer periphery of the drive shaft (533) where the moving pin (533d1) is located, and the moving pin (533d1) may move in the longitudinal direction of the moving slot (533e) while being coupled to the moving slot (533e).

[0199] Accordingly, when moving backwards of the hand bike (1) to change the direction of parking and driving, etc., each moving pin (533d1) is moved in the direction toward the differential device (531) to disconnect the connection between the first drive chain wheel (532) and the first rotation shaft (533a), thereby preventing reverse rotation of the handle pedal (515).

[0200] In one embodiment of the present invention, the first rotation shaft (533a) of the drive shaft (533) is configured to be movable so as to be connected and disconnected from the differential device (531) and the first drive chain wheel (532) that is linked to the differential device (531), but it is also possible for the second rotation shaft (533b) of the drive shaft (533) to move in conjunction with the first rotation shaft (533a), thereby connecting and disconnecting the second rotation shaft (533b) and the second drive chain wheel (535) to block the power of the auxiliary wheel unit (350) from being transmitted to the handle chain wheel (513).

[0201] In addition, the second rotation shaft (533b) of the drive shaft (533) is made movable like the first rotation shaft (533a), and a separate link member (not shown) is further included in the second rotation shaft (533b), so that the second rotation shaft (533b) and the second drive chain wheel (535) can be connected and disconnected by movement of only the second rotation shaft (533b), thereby blocking the power of the auxiliary wheel unit (350) from being transmitted to the handle chain wheel (513). If it is easy to block the power of the auxiliary wheel unit (350) from being transmitted to the handle chain wheel (513), the present invention is not limited thereto and can be variously modified.

[0202] The above-mentioned connecting support member (550) is for connecting the hand crank member (510) and the driving member (530), and may include a support shaft (551) having one end connected to the lower portion of the driving shaft member (511) of the hand crank member (510) and a support frame (553) installed at the other end of the support shaft (551).

[0203] The above support frame (553) may include a horizontal support (553a) to which the other end of the support shaft (551) is connected and each vertical support (553b) that is integrally formed to extend orthogonally to both longitudinal ends of the horizontal support (553a).

[0204] A differential device (531) and a first drive chain wheel (532) connected to the differential device (531) may be arranged between each of the vertical supports (553b), and a through hole (553b1) corresponding to the diameter of each drive shaft (533) may be formed in each of the vertical supports (553b) so that each drive shaft (533) may be installed through it.

[0205] In one embodiment, auxiliary support shafts (not shown) are further provided on both sides of the horizontal support (553a) of the support frame (553) and the outer periphery of the support shaft (551), thereby firmly fixing the support frame (553) and the support shaft (551).

[0206] Meanwhile, a link member (570) may be further included that allows a passenger or driver to adjust each moving pin (533d1) installed to be exposed to the outside on each drive shaft (533) in one motion to establish or release the connection between the first rotation shaft (533a) and the differential device (531).

[0207] To this end, referring to FIGS. 8 and 9, a vertical slot (551a) may be formed long in the longitudinal direction of the support shaft (551) on the other side of the support shaft (551) close to the support frame (553), and a link pin (551b) may be formed to protrude and move in the vertical slot (551a).

[0208] The above link member (570) may include a first link member (571) having one end connected to a link pin (551b), a second link member (573) arranged symmetrically with the first link member (571) and having one end connected to the link pin (551b), a third link member (575) having one end connected to the other end of the first link member (571) and the other end connected to a moving pin (533d1) of one drive shaft (533), a fourth link member (577) having one end connected to the other end of the second link member (573) and the other end connected to a moving pin (533d1) of another drive shaft (533), and a fifth link member (579) connecting the centers of the third link member (575) and the fourth link member (577).

[0209] Here, the above link members (571, 573, 575, 577, 579) can be rotatably connected to each other by fastening members (not shown in the drawing) such as bolts.

[0210] Accordingly, when the passenger or driver moves the link pin (551b) upward in the longitudinal direction of the support shaft (551), each end of the first link member (571) and the second link member (573) moves upward in response to the movement direction of the link pin (551b), each end of the third link member (575) and the fourth link member (577) connected to the other ends of the first link member (571) and the second link member (573) rotates in a direction toward the support frame (553), and each end of the third link member (575) and the fourth link member (577) rotates away from the support frame (553) so as to move away from each other with respect to the connection portion connected to the fifth link member (579), and each moving pin (533d1) connected to each other end of the third link member (575) and the fourth link member (577) The coupling between the differential device (531) and the first rotary shaft (533a) can be disengaged by moving horizontally away from the differential device (531).

[0211] Meanwhile, when the passenger or driver moves the link pin (551b) downward in the longitudinal direction of the support shaft (551), each end of the first link member (571) and the second link member (573) moves downward in response to the movement direction of the link pin (551b), each end of the third link member (575) and the fourth link member (577) connected to the other ends of the first link member (571) and the second link member (573) rotates in a direction away from the support frame (553), and each end of the third link member (575) and the fourth link member (577) rotates in a direction toward the support frame (553) so that they come closer to each other with respect to the connection portion connected to the fifth link member (579), and the moving pin (533d1) connected to each end of the third link member (575) and the fourth link member (577) The differential device (531) and the first rotary shaft (533a) can be coupled while moving horizontally closer to the differential device (531).

[0212] The above second drive chain wheel (535) is connected to the auxiliary wheel part (350) of the cargo part (300) and can transmit the rotational power of the hand crank part (510) to a pair of auxiliary wheels (351).

[0213] Specifically, the second drive chain wheel (535) is provided at the end of the second rotation shaft (533b) installed in each drive shaft (533) in the direction opposite to the differential device (531), and can be rotatably connected to each auxiliary wheel (351) and the second drive chain (537).

[0214] Accordingly, when a rider rotates the handle pedal (515), the first drive chain wheel (532) connected to the hand chain wheel (513) via the first drive chain (532a) rotates, and each drive shaft (533) connected to the first drive chain wheel (532) rotates according to the rotation of each first drive chain wheel (532), and each second drive chain wheel (535) connected to the end of the drive shaft (533) rotates according to the rotation of each drive shaft (533), and each auxiliary wheel (351) connected to each second drive chain wheel (535) via the second drive chain (537) rotates, thereby allowing the bike unit (100) to operate.

[0215] Meanwhile, the hand crank unit (510) may further include a mid-motor (517) on one side of the drive shaft unit (511).

[0216] The above mid-motor (517) is for transmitting power to a hand chain wheel (513) connected to a drive shaft (511), and may be an electric motor, a hub motor, or a mid-drive. When the mid-motor (517) is an electric motor, a hub motor, or a mid-drive, the auxiliary wheel (350) can be rotated and driven only by the power of the mid-motor (517).

[0217] Even at this time, the mid-motor (517) may be a PAS (Pedal Assist System), and if the mid-motor (517) is a PAS, when the rider rotates the handle pedal (515) with little force, the PAS generates power to rotate the auxiliary wheel (350) with a force greater than that of the rider, thereby driving the hand bike (1).

[0218] Meanwhile, since the hand crank assembly (500) is installed on the upper front side of the cargo section (300), when loading a wheelchair (3) into the receiving space (301) of the cargo section (300) or unloading a wheelchair (3) loaded on the receiving space (301), the wheelchair (3) must be separated from the cargo section (300) before loading and unloading.

[0219] Accordingly, the hand crank assembly (500) according to the present invention can be detachably installed in the cargo section (300).

[0220] Specifically, referring to FIG. 10, it may include a flange (538) integrally formed by protruding from the end side of each drive shaft (533) in the direction opposite to the differential device (531) and a hand crank connection assembly (560) provided on the outer surface of both sides of the periphery (303) of the cargo section (300) so that the flange (538) can be detachably installed.

[0221] The flange (538) is for detachably connecting the hand crank assembly (500) to the cargo section (300), and may be formed as a plate body in the shape of a roughly fan-shaped plate that protrudes to one side from the outer periphery of the end of each drive shaft (533), but is formed so that both sides are inclined in a shape that increases in the direction away from the outer periphery.

[0222] The flange (538) may have a plurality of fixing holes (538a) spaced at regular intervals along the edge side and formed to penetrate in the circumferential direction.

[0223] The flange (538) may have fixed pieces (538b) protrudingly formed on both sides adjacent to the fixed hole (538a), and each of the fixed pieces (538b) may be formed in a cylindrical shape.

[0224] The hand crank connection assembly (560) may be provided on each side of the cargo section (300) to drive each auxiliary wheel (351) by receiving power from the hand crank section (510) and power from the driving section (530) connected to the hand crank section (510) while the flange (538) is coupled.

[0225] Specifically, the hand crank connection assembly (560) may include a connection body (561) installed on the outer sides of both sides of the cargo section (300), a flange groove (563) formed in the center of the upper side of the connection body (561) in the direction of travel of the cargo section (300), and a fixing groove (565) formed in the center of the upper side of the connection body (561) in the direction of travel of the cargo section (300), but formed on the outer side of the flange groove (563).

[0226] The connecting body (561) is arranged obliquely on the outer side of both sides of the cargo section (300), and can be installed on the outer side of both sides of the cargo section (300) through fastening members such as bolts.

[0227] The flange home (563) can be formed with a width corresponding to the width of the flange (538).

[0228] The flange groove (563) can be formed in a fan shape corresponding to the outer periphery of the flange (538) so that the flange (538) can be rotated and joined after being inserted.

[0229] The fixed groove (565) is formed to extend from both sides of the width direction of the flange groove (563), and can be formed with a width corresponding to the sum of the width of the flange (538) and the length of the fixed piece (538b).

[0230] The fixed groove (565) may have an inlet (565a) formed on one side, and a step portion (565b) formed on the inner surface of the remaining portion excluding the inlet (565a) up to the width of the flange groove (563). That is, the fixed groove (565) may have an inlet (565a) formed on one side, and a step portion (565b) formed toward the center of each inner surface of the remaining portion excluding the inlet (565a), and the space between each step portion (565b) may be formed to correspond to the width of the flange groove (563).

[0231] In this way, an inlet (565a) is formed only on one side of the fixed groove (565), and the remaining part of the fixed groove (565) except for the inlet (565a) is closed by a step portion (565b), so that each fixed piece (538b) of the flange (538) introduced and inserted into the interior of the fixed groove (565) through the inlet (565a) of the fixed groove (565) can be rotated along the fixed groove (565) and then caught by each step portion (565b) so as not to be detached or separated to the outside.

[0232] Accordingly, the outer periphery of the fixed piece (538b) of the flange (538) introduced and inserted into the inlet (565a) of the fixed groove (565) comes into contact with each step portion (565b) of the fixed groove (565) and moves on the fixed groove (565), and the fixed piece (538b) is fixed by being caught on the step portion (565b) and thus does not come off to the outside.

[0233] By the structure described above, the flange (538) formed by protruding from one side of the outer circumference of the fixed shaft is partially inserted into the flange groove (563) and then rotated so that the flange (538) is rotated and inserted into the inside of the flange groove (563), and the fixed pieces (538b) formed by protruding from both sides of the flange (538) are inserted along the entrances (565a) of the fixed grooves (565) formed on both sides of the flange groove (563), and then move while the outer circumference comes into contact with the step portion (565b) of the fixed groove (565), but the fixed pieces (538b) are caught by the step portion (565b) and do not come off or separate to the outside, so that the hand crank assembly (500) can be installed in the hand crank connection assembly (560).

[0234] In addition, when separating the hand crank assembly (500) from the hand crank connection assembly (560), the fixed shaft is rotated in a direction opposite to the direction in which it is coupled to the connecting body (561) so that the fixed piece (538b) of the flange (538) is positioned at the inlet (565a) of the fixed groove (565), and each fixed piece (538b) is pulled out through the inlet (565a), thereby separating the hand crank assembly (500) from the hand crank connection assembly (560).

[0235] Meanwhile, the hand crank connection assembly (560) may include a first fixing lever (580) for fixing the installed hand crank assembly (500).

[0236] That is, the first fixing lever (580) can fix the hand crank assembly (500) to the hand crank connection assembly (560) after connecting the flange (538) of the hand crank assembly (500) to the flange groove (563) of the hand crank connection assembly (560), and then set the rotation angle of the hand crank assembly (500) to a position where it is easy for the passenger to rotate the handle.

[0237] The first fixing lever (580) can be installed on one side of the connecting body (561) to fix the hand crank assembly (500) to the hand crank connecting assembly (560).

[0238] Here, the first fixing lever (580) may be installed on one side of the connecting body (561) closer to the passenger so that the passenger, who is riding in the receiving space (301) of the cargo section (300), can easily fix the hand crank assembly (500) to the hand crank connection assembly (560) after positioning the handle pedal (515) of the hand crank assembly (500) in a position where it is easy to hold it by hand.

[0239] Specifically, referring to FIG. 11, the first fixed lever (580) may include a first lever body (581) installed on one side of the connecting body (561), a first lever pin (583) that is configured to be movable in the longitudinal direction within the first lever body (581), a pin handle (585) provided at an end of the first lever pin (583) to rotate the first lever pin (583), and a pressing member (587) provided inside the first lever body (581) to press the first lever pin (583).

[0240] Here, a hole (not shown in the drawing) having a diameter corresponding to the diameter of the first lever body (581) may be formed in the connecting body (561) so that the first lever body (581) of the first fixed lever (580) may be inserted and installed, and the hole may be formed to penetrate the flange groove (563).

[0241] A screw portion may be formed on a portion of the inner circumference of the hole and the outer circumference of the first lever body (581) so as to be mutually coupled.

[0242] The first fixed lever (580) may have an end of the first lever pin (583) partially exposed on one side of the first lever body (581) coupled to the connecting body (561), and a pin handle (585) may be provided on the end of the first lever pin (583) facing away from the connecting body (561).

[0243] The first lever body (581) has a moving hole (581a) formed through the inside for the first lever pin (583) to move, and one end of the first lever body (581) where the pin handle (585) is placed can have a cut portion (581b) formed so that the heights are different along the circumferential direction.

[0244] A stopper (not shown) is formed protrudingly on the outer periphery of the first lever pin (583), and a pressure member (587) is formed in a coil shape and can be installed to press the stopper of the first lever pin (583).

[0245] Accordingly, when the pin handle (585) is rotated in one direction, the lower surface of the pin handle (585) moves along the upper surface of the cut-out (581b) of the first lever body (581) toward the first lever body (581), and accordingly, the first lever pin (583) connected to the pin handle (585) moves toward the connecting body (561) and can be inserted into one of the fixing holes (538a) selected from among the fixing holes (538a) formed in the flange (538).

[0246] In addition, when the pin handle (585) is rotated in the other direction, the lower surface of the pin handle (585) moves away from the first lever body (581) along the upper surface of the cutout (581b) of the first lever body (581), and accordingly, the first lever pin (583) connected to the pin handle (585) moves away from the connecting body (561) and can be separated from the fixing hole (538a).

[0247] At this time, the pressure member (587) can move the first lever pin (583) by contracting and expanding and returning to the initial position.

[0248] Meanwhile, in order to separate the hand crank assembly (500) from the cargo section (300) for entry and exit of the wheelchair (3) into the cargo section (300), or to install the hand crank assembly (500) in the cargo section (300) for driving after loading the wheelchair (3), the second drive chain wheel (535) of the hand crank assembly (500) must also be installed so as to be able to be coupled to and separated from the drive shaft (533).

[0249] Referring to FIG. 12, the second drive chain wheel (535) has an installation hole (535a) formed through the center thereof for installing a second rotation shaft (533b), and the second rotation shaft (533b) can be detachably coupled to the installation hole (535a).

[0250] Additionally, a cover body (535b) may be provided on one side of the center of the second drive chain wheel (535). The cover body (535b) may be in the form of a cover having a space formed inside so that an end of the second rotation shaft (533b) can be placed.

[0251] And, in order for the second drive chain wheel (535) to rotate in accordance with the rotation of the second rotation shaft (533b), the outer circumference of the end of the second rotation shaft (533b) and the inner circumference of the through hole (553b1) where the end of the second rotation shaft (533b) is joined can mesh with each other in the form of a gear.

[0252] Here, the cover body (535b) is provided with a second fixed lever (590), and an installation groove (533b2) may be formed along the circumferential direction on the outer periphery of the end of the second rotary shaft (533b) located inside the cover body (535b).

[0253] Specifically, referring to FIG. 13, the second fixed lever (590) may include a second lever body (591) that is coupled and installed on the outer periphery of the cover body (535b), a second lever pin (593) that is installed through the center of the second lever body (591) and is configured to move in the longitudinal direction of the second lever body (591), and a coil-shaped pressing member (not shown) that presses the second lever pin (593) and is installed in a form that surrounds the outside of the fixed pin.

[0254] In addition, the second lever pin (593) installed in the second lever body (591) can be configured to move toward an installation groove (533b2) arranged inside the cover body (535b), and the pressing member can press the second lever pin (593) so that the second lever pin (593) is inserted and positioned in the installation groove (533b2).

[0255] Here, a pulling ring (597) may be provided at the end of the second lever pin (593) that is away from the second lever body (591).

[0256] Accordingly, the passenger or driver of the cargo compartment (300) can pull the pull ring (597) to release the second lever pin (593) inserted into the installation groove (533b2) from the installation groove (533b2), and then separate the second drive chain wheel (535) from the second rotary shaft (533b).

[0257] In addition, when a passenger or driver of the cargo unit (300) pulls the pull ring (597) and connects the separated second drive chain wheel (535) to the second rotary shaft (533b) and then places it on the pull ring (597), the second lever pin (593) is inserted and connected to the installation groove (533b2), so that the second drive chain wheel (535) can be connected and maintained in a connected state with the second rotary shaft (533b).

[0258] Meanwhile, the cargo section (300) may further include a storage section (370) for storing the second drive chain wheel (535) separated from the second rotary shaft (533b).

[0259] Specifically, the storage unit (370) may include at least one fixing pin (371) that is formed protrudingly on the outer side of both sides of the circumference (303) of the cargo unit (300), a storage piece (535b1) that is formed long in the center of one side of the cover body (535b), and at least one storage pin (353b2) that is formed protrudingly on the side of the storage piece (535b1) that faces the fixing pin (371).

[0260] The above storage pin (353b2) may have a storage groove (353b3) formed in the center for inserting a fixing pin (371).

[0261] For this purpose, the diameter of the fixing pin (371) can be formed to correspond to the diameter of the storage groove (353b3).

[0262] By the structure as described above, the second drive chain wheel (535) separated from the second rotation shaft (533b) can be stored by inserting the fixing pin (371) provided on the outer side of both sides of the circumference (303) of the cargo section (300) into the storage groove (353b3) of the storage pin (353b2) of the second drive chain wheel (535) separated from the second rotation shaft (533b).

[0263]

[0264] Hereinafter, the process of loading a wheelchair into the cargo section of a hand bike according to the present invention will be briefly described.

[0265] First, in order to load a wheelchair (3) with a passenger on board into the cargo compartment (300), the hand crank assembly (500) installed in the cargo compartment (300) is separated.

[0266] Specifically, by pulling the pull ring (597) of each second fixed lever (590), the second lever pin (593) inserted into the installation groove (533b2) of the second rotary shaft (533b) is separated from the installation groove (533b2), and the second drive chain wheel (535) coupled to the second rotary shaft (533b) is separated, and the storage pin (353b2) of the separated second drive chain wheel (535) is inserted into the fixing pins (371) formed on both sides of the circumference (303) of the cargo section (300) to store the second drive chain wheel (535) for a certain period of time.

[0267] In this way, the second drive chain wheel (535) separated from the second rotation shaft (533b) is connected to the fixing pins (371) protruding on both sides of the cargo section (300) and stored, so that when the hand crank assembly (500) is separated from the hand crank connection assembly (560), the second drive chain wheel (535) separated from the second rotation shaft (533b) can be positioned on the floor or ground to prevent the surroundings from being disturbed or foreign substances from being attached to the gears or chain.

[0268] Next, by rotating the pin handle (585) of the first fixed lever (580), the first lever pin (583) inserted into the fixed hole (538a) of the flange (538) is separated, and then the hand crank assembly (500) is rotated so that the fixed pieces (538b) protruding on both sides of the flange (538) are positioned at the entrance (565a) of the fixed groove (565), and then the hand crank assembly (500) is separated from the hand crank connection assembly (560).

[0269] Then, the door part (310) formed on the front part of the cargo part (300) is opened, spread out on the floor to form a slope, and then the wheelchair (3) is moved along the slope to be loaded into the storage space (301) of the cargo part (300).

[0270] At this time, the first door (311) of the door section (310) is turned in the direction of travel of the cargo section (300) to form a slope of a certain angle, and then the wheelchair (3) is moved along the slope to be loaded into the receiving space (301) of the cargo section (300), or the first door (311) and the second door (313) are turned in the direction of travel of the cargo section (300) to form a slope having a gentler slope angle than the slope formed by turning only the first door (311), and then the wheelchair (3) is loaded into the receiving space (301) of the cargo section (300).

[0271] After loading the wheelchair (3) into the receiving space (301) of the cargo compartment (300), the hand crank assembly (500) is installed again into the hand crank connection assembly (560).

[0272] That is, after inserting the flange (538) of the hand crank connection assembly (560) into the flange groove (563) of the hand crank connection assembly (560), the hand crank assembly (500) is rotated while the flange (538) is inserted into the flange groove (563) so that the handle pedal (515) is positioned in a position where it is easy for a passenger riding in the cargo section (300) to rotate it.

[0273] At this time, the fixed piece (538b) protruding on both sides of the flange (538) is inserted into the fixed groove (565) through the entrance (565a) of the fixed groove (565) and rotates, and the hand crank assembly (500) rotated by the step portion (565b) formed in the fixed groove (565) does not come off or separate from the hand crank connection assembly (560).

[0274] Here, when the passenger on the cargo section (300) rotates the handle pedal (515) by rotating the hand crank assembly (500), the first fixing lever (580) is pulled outward from the connecting body (561) to release the connection between the first lever pin (583) of the first fixing lever (580) and the fixing hole (538a), and when the passenger is positioned at a position where it is easy to rotate the handle pedal (515), the force pulling the first fixing lever (580) is released to connect the first lever pin (583) of the first fixing lever (580) and the fixing hole (538a), thereby fixing the hand crank assembly (500) to the hand crank connection assembly (560).

[0275] Next, after separating the storage pin (353b2) from the fixing pin (371), the second drive chain wheel (535) is coupled to the end of the second rotation shaft (533b), and then the fixing pin of the second fixing lever (590) provided on the cover body (535b) is positioned on the installation groove (533b2) to connect the second rotation shaft (533b) and the second drive chain wheel (535).

[0276] In this way, after the hand crank assembly (500) is installed in the hand crank connection assembly (560), the driver sitting on the saddle (120) can drive by stepping on the main pedal with his / her feet to rotate the main wheel (130), and the passenger sitting on the wheelchair (3) mounted in the storage space (301) of the cargo section (300) can assist driving through the auxiliary wheel (350) by rotating the handle pedal (515) with his / her hands.

[0277]

[0278] Hereinafter, a process of moving backwards by a hand bike according to the present invention for parking or changing the driving direction is briefly described.

[0279] First, when moving the hand bike (1) backwards for parking, changing the driving direction, etc., the reverse rotation of the handle pedal (515) must be prevented to prevent injury to the face of the rider that may occur due to the rotation of the handle pedal (515).

[0280] Therefore, the second drive chain wheel (535) that rotates when moving backwards and the hand crank assembly (500) must be disengaged.

[0281] To this end, the link pin (551b) of the link member (570) is moved to the upper side in the longitudinal direction of the support shaft (551).

[0282] Accordingly, each end of the first link member (571) and the second link member (573) moves upward, each end of the third link member (575) and the fourth link member (577) connected to the other end of the first link member (571) and the second link member (573) rotates in a direction toward the support frame (553), each end of the third link member (575) and the fourth link member (577) rotates in a direction away from the support frame (553), and each moving pin (533d1) connected to each end of the third link member (575) and the fourth link member (577) moves in a direction away from the differential device (531), thereby releasing the coupling between the differential device (531) and the first rotation shaft (533a).

[0283] At this time, when each moving pin (533d1) moves in a direction away from the differential device (531), the other side of the moving shaft (533d) to which the moving pin (533d1) is connected presses one side of the connecting shaft (533c), so that the moving pin (533d1) moves on the moving groove (533b1), and the first rotating shaft (533a) connected to the connecting shaft (533c) by the pin (533c2) moves in a direction away from the differential device (531), thereby releasing the coupling.

[0284] Meanwhile, when linking the second drive chain wheel (535) and the hand crank assembly (500) to drive the hand bike (1) again, the link pin (551b) of the link member (570) is moved to the longitudinal lower side of the support shaft (551).

[0285] Accordingly, each end of the first link member (571) and the second link member (573) moves downward, each end of the third link member (575) and the fourth link member (577) connected to the other ends of the first link member (571) and the second link member (573) rotates away from the support frame (553), each end of the third link member (575) and the fourth link member (577) rotates toward the support frame (553), and each moving pin (533d1) connected to the other ends of the third link member (575) and the fourth link member (577) moves toward the differential device (531), thereby engaging the differential device (531) and the first rotary shaft (533a).

[0286] At this time, when each moving pin (533d1) moves in the direction toward the differential device (531), one side of the moving shaft (533d) presses the step portion (565b) of the first rotation shaft (533a), so that the first rotation shaft (533a) moves toward the differential device (531), and as the moving pin (533d1) moves on the moving groove (533b1), the connecting shaft (533c) connected to the first rotation shaft (533a) by the pin (533c2) moves, so that the first rotation shaft (533a) can be coupled to the differential device (531) and linked.

[0287]

[0288] While the present invention has been illustrated and described with reference to specific embodiments thereof, it will be readily apparent to those skilled in the art that various modifications and variations may be made therein without departing from the spirit and scope of the invention as set forth in the appended claims.

Claims

1. A bike part including a frame part, a saddle part provided on the upper part of the frame part for a driver to sit on, a main wheel part provided rotatably on the lower part of the frame part for driving, and a main pedal part provided rotatably on the frame part and connected to the main wheel part to rotate the main wheel; A cargo section that is rotatably connected to the bike section and includes a storage space provided inside, a door section that is installed so as to be opened and closed, auxiliary wheels provided on each side, and a handle section for adjusting the driving direction; and A hand crank assembly that is detachably installed in the cargo section and is connected to the auxiliary wheel section to drive the auxiliary wheel section; A hand bike characterized by including:

2. In claim 1, The above hand crank assembly, A hand crank section that provides power to a cargo section, including a drive shaft section, a hand chain wheel that is installed on the inside of the drive shaft section so as to be rotatable along the same axis, and handle pedals that are connected to each side of the hand chain wheel and rotate the hand chain wheel; A driving unit that transmits power from a hand crank unit to an auxiliary wheel unit, including a differential unit, a first drive chain wheel that is rotatably connected to the hand chain wheel by a first drive chain while being connected to one side of the differential unit in the same axial line, a drive shaft that is connected to each side of the differential unit and rotates in conjunction with the first drive chain wheel, and a second drive chain wheel that is detachably provided at the end of each drive shaft in the opposite direction to the differential unit; and A connecting support unit that connects the hand crank unit and the driving unit, the connecting support unit including a support shaft having one end connected to the lower end of the driving shaft unit of the hand crank unit, and a support frame installed at the other end of the support shaft; A hand bike characterized by including:

3. In claim 2, The above drive shaft, A first rotation shaft that moves toward a differential device and rotates in conjunction with a first drive chain, a second rotation shaft that is provided at a predetermined distance from the first rotation shaft, and a connecting shaft that is installed at opposite ends of the first rotation shaft and the second rotation shaft and is interlocked, A step is formed at a certain portion of the opposite ends where the first and second rotation shafts face each other so that the diameter is smaller than that of the remaining portions, and a moving shaft is provided at a portion of the first rotation shaft with a smaller diameter, and the moving shaft is arranged between the step portion of the first rotation shaft and the connecting shaft. A hand bike characterized in that a movable groove is formed in the longitudinal direction of the second rotary shaft on the outer circumference of a portion having a small diameter of the second rotary shaft, a movable pin protrudingly formed on the inner circumference of the connecting shaft and the connecting shaft is fixedly connected to the portion having a small diameter of the first rotary shaft by a pin.

4. In claim 3, The above drive shaft, Further comprising a link member for establishing or releasing the connection between the first rotary shaft and the differential device, The above support shaft includes a vertical slot formed in the longitudinal direction, and a link pin formed to protrude movably from the vertical slot, A hand bike characterized in that the link member includes a first link member having one end connected to the link pin, a second link member symmetrically arranged to the first link member and having one end connected to the link pin, a third link member having one end connected to the other end of the first link member and the other end connected to a moving pin of one drive shaft, a fourth link member having one end connected to the other end of the second link member and the other end connected to a moving pin of another drive shaft, and a fifth link member connecting the centers of the third link member and the fourth link member.

5. In claim 2, Each of the above drive shafts further includes a flange formed protruding on the outer periphery of the end opposite to the differential device, The above cargo section further includes a hand crank connection assembly for detachably installing the flange on the outer sides of both sides, The above flange includes a plurality of fixing holes formed in a circumferential direction at regular intervals on the edge side, and fixing pieces formed protruding on each of the two sides adjacent to the fixing holes. The hand bike is characterized in that the hand crank connection assembly includes a connection body installed on the outer sides of both sides of the cargo section, a flange groove formed in the center of the upper side of the connection body in the direction of travel of the cargo section and into which a flange is inserted and rotatably installed, and a fixing groove formed on the outer side of the flange groove, wherein an inlet is formed on one side, and a step portion is formed toward the center of the remaining portion excluding the inlet, and the fixing piece is inserted and rotatably fixed.

Images