CN211454412U - Hand crank capable of being stored - Google Patents

Abstract

The utility model provides a hand crank that can accomodate, including the crank body, the lower extreme of crank body is provided with folding mechanism, be provided with locking mechanical system between crank body, the folding mechanism, the crank body includes tubule, well pipe, thick pipe, rotatory handle hexagonal mounting, folding mechanism include first rotatory handle, with first rotatory handle vertically second rotatory handle, be provided with the fixed pin between first rotatory handle and rotatory handle hexagonal mounting, the second rotatory handle, the lower extreme movable mounting of second rotatory handle has the rotatory lid of internal thread, the inside symmetry of first rotatory handle is provided with two spring mounting. A hand crank that can accomodate, hand crank length can be adjusted, is fit for the people of different heights to use, and can increase the length of hand crank, facilitates the use, uses the inside of accomplishing the back with folding mechanism income thick pipe, reduces the space that the hand crank occupy, conveniently carries.

Description

Hand crank capable of being stored

Technical Field

The utility model relates to a hand crank technical field, in particular to hand crank that can accomodate.

Background

The hand crank is mostly divided into a foldable structure and an integral structure, the foldable structure comprises a long rod, two short rods and two rotating shafts, the long rod can be pulled into a straight rod, the hand crank can be folded into a hand crank, and the hand crank is integrally formed by the long rod and the two rotating shafts.

The rotary handle at the bottom of the existing product is foldable, the length of the whole hand crank is increased after the handle is straightened, and the occupied space is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hand crank that can accomodate, hand crank length can be adjusted, is fit for the people of different heights to use, and can increase the length of hand crank, facilitates the use, uses the inside of accomplishing the back with folding mechanism income thick pipe, reduces the space that the hand crank occupy, conveniently carries.

The embodiment of the utility model is realized like this:

the embodiment of the utility model provides a hand crank that can accomodate, including the crank body, the lower extreme of crank body is provided with folding mechanism, be provided with locking mechanical system between crank body, the folding mechanism, the crank body includes tubule, well pipe, thick pipe, rotatory handle hexagonal mounting, folding mechanism include first twist grip, with first twist grip vertically second twist grip, be provided with the fixed pin between first twist grip and rotatory handle hexagonal mounting, the second twist grip, the lower extreme movable mounting of second twist grip has the rotatory lid of internal thread, the inside symmetry of first twist grip is provided with two spring mounting, be connected with expanding spring between two spring mounting of the inside of first twist grip.

Optionally, the bottom outside of crank body is provided with rotary mechanism, rotary mechanism includes the thick tub of axis of rotation of first thick pipe, second, the thick tub of axis of rotation of first thick pipe, the thick tub of axis of rotation of second cover in the outside of thick tub, the internal surface of the thick tub of axis of rotation of first thick pipe, second and the surface swing joint of thick tub, the outside fixed mounting of the thick tub of axis of rotation of first thick pipe, second has the thick tub of rotation of first thick pipe handle, the thick tub of rotation of second handle, the thick tub of rotation of first thick pipe handle, second rotates the central line axis symmetry of handle about the thick tub.

Through adopting above-mentioned technical scheme, can make first thick pipe rotate handle, the thick pipe rotation of second rotate the handle in the outside of thick pipe through first thick pipe axis of rotation, the thick pipe axis of rotation of second, and the thick pipe of being convenient for rotates the rotation of handle, the thick pipe rotation of second when the operation, and it is more convenient to operate.

Optionally, be provided with first adjustment mechanism between tubule, well pipe, first adjustment mechanism includes locking cover, internal thread locking rotating member, the locking cover is the opening, the locking cover is in the outside of tubule, and the upside of locking cover is circular downside for the dodecagonal flower type, locking cover bottom and well pipe internal surface shape looks adaptation, the inside tangent plane of internal thread locking rotating member is trapezoidal, the internal surface of internal thread locking rotating member and the surface connection of locking cover, the screw thread strip has been seted up to the surface of well pipe, and the internal surface of internal thread locking rotating member lower part and the surface on well pipe upper portion pass through threaded connection.

Through adopting above-mentioned technical scheme, with the locking cover in the outside of tubule and inside the well pipe of inserting, with the outside of internal thread locking rotating member cover at locking cover and well pipe, make the bottom of locking cover twist in the upper end of well pipe, and then make tubule, well union coupling, through not hard up internal thread locking rotating member can adjust the height between tubule, the well pipe.

Optionally, be provided with second adjustment mechanism between thick pipe and the well pipe, the lower extreme of well pipe passes through the upper end fixed connection of second adjustment mechanism and thick pipe, the crank body still includes the crank hook, the lower extreme of crank hook and the upper end fixed connection of tubule.

Through adopting above-mentioned technical scheme, can adjust the height between thick pipe and the well pipe through second adjustment mechanism.

Optionally, the inboard of well pipe is provided with tubule hexagonal mounting in the bottom of tubule, and the inboard of the thick pipe in the bottom of well pipe is connected with well pipe hexagonal mounting, the inside tangent plane of well pipe, thick pipe is the dodecagonal flower type, the upper end surface of tubule hexagonal mounting is connected with the lower extreme external fixed surface of tubule, and the upper end surface of well pipe hexagonal mounting is connected with the lower extreme external fixed surface of well pipe.

Through adopting above-mentioned technical scheme, can die the bottom lock of tubule through tubule hexagonal mounting, avoid the tubule to die at well intraduct independent rotation, and can die the bottom lock of well pipe through well pipe hexagonal mounting, avoid well pipe at the inside independent rotation of thick intraduct, fixed more firm, the transmission effect is better.

Optionally, the hexagonal fixing piece of the rotary handle is fixed at the lower end of the thick pipe through a locking mechanism, and the structure of the locking mechanism is the same as that of the first adjusting mechanism.

Through adopting above-mentioned technical scheme, can fix the lower extreme at the thick pipe with rotatory handle hexagonal mounting through locking mechanical system, avoid during operation rotatory handle hexagonal mounting drunkenness from top to bottom, it is fixed firm.

Optionally, the both ends of first rotatory handle are connected with rotatory handle hexagonal mounting, the rotatory handle of second through the fixed pin respectively, expanding spring's both ends and spring mounting fixed connection, expanding spring is located the central point of first rotatory handle and puts, the outside activity of the rotatory handle of second is provided with rotatory handle axle sleeve, and two spring mountings are connected with rotatory handle hexagonal mounting and the rotatory handle of second respectively.

Through adopting above-mentioned technical scheme, insert the round hole at first rotatory handle both ends through the fixed pin and can make rotatory handle hexagonal mounting, the both ends at first rotatory handle are installed to the rotatory handle of second, through expanding spring, the cooperation of spring mounting can be with first rotatory handle, the rotatory handle of second is flare-outed, can increase the length of hand handle, and is convenient to use, can reduce the frictional force between hand and the rotatory handle of second when rotating through rotatory handle axle sleeve, use the inside of receiving the thick pipe with folding mechanism after accomplishing, screw up the locking with the rotatory lid of internal thread, reduce the space that hand handle occupy, conveniently carry.

The utility model discloses beneficial effect includes: the embodiment of the utility model provides a hand crank that can accomodate, with the locking cover outside the tubule and insert the well intraduct, with internal thread locking rotating member cover in the outside of locking cover and well intraductal, make the bottom of locking cover twist in the upper end of well intraductal, because internal thread locking rotating member internal surface slope can make the locking cover lock the outside at the tubule, and then make tubule, well union coupling, can adjust the height between tubule, well intraductal through not hard up internal thread locking rotating member, and the locking cover is the circular downside dodecagonal flower type of upside, the locking cover downside is connected with the flower type inner wall of thick pipe, keep the locking cover can not lead to the fact the pipe to block when flexible and rotate internal thread locking rotating member when rotatory together with internal thread locking rotating member, the height control between tubule, well intraductal is more convenient, the structure between second adjustment mechanism and the first adjustment mechanism is the same, the height between the middle pipe and the thick pipe can be adjusted through the second adjusting mechanism, the outer surface of the thin pipe hexagonal fixing piece is matched with the inner surface of the middle pipe, the outer surface of the middle pipe hexagonal fixing piece is matched with the inner surface of the thick pipe, the bottom of the thin pipe can be locked through the thin pipe hexagonal fixing piece, the thin pipe is prevented from independently rotating inside the middle pipe, the bottom of the middle pipe can be locked through the middle pipe hexagonal fixing piece, the middle pipe is prevented from independently rotating inside the thick pipe, the fixing is firm, the transmission effect is good, the device is suitable for different working scenes, a user can adjust the hand crank according to the height of the user or the installation height of a product, the use comfort level of an operator is improved, the rotary handle hexagonal fixing piece can be fixed at the lower end of the thick pipe through the locking mechanism, and the rotary handle hexagonal fixing piece is, it is fixed firm, insert the fixed pin in the round hole at first rotatory handle both ends, and then make rotatory handle hexagonal mounting, the both ends at first rotatory handle are installed to the rotatory handle of second, through expanding spring, the cooperation of spring mounting can be with first rotatory handle, the rotatory handle of second is flare-outed, can increase the length of hand handle, and is convenient to use, can reduce the frictional force between hand and the rotatory handle of second when rotating through rotatory handle axle sleeve, use the inside of receiving the thick pipe with folding mechanism after accomplishing, screw up the locking with the internal thread rotatory lid, reduce the space that the hand handle occupy, and is convenient to carry, the effect of use is better for traditional mode.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of the overall structure of a length-adjustable crank handle of the present invention;

fig. 2 is a schematic view of a partial structure of a length-adjustable crank handle of the present invention;

fig. 3 is an exploded view of the first adjusting mechanism of the length-adjustable crank handle of the present invention;

FIG. 4 is a structural schematic of the thin tube and thin tube hexagonal fixing member of the length-adjustable crank of the present invention;

fig. 5 is a cutting schematic view of the middle tube and the thin tube hexagonal fixing piece of the manual and electric integrated crank of the utility model;

fig. 6 is a schematic view of the cutting structure of the folding mechanism of the foldable crank handle of the present invention.

Icon: 1. a crank body; 11. a hand crank hook; 12. a thin tube; 13. a middle tube; 14. a first adjustment mechanism; 141. a locking sleeve; 142. an internal thread locking swivel; 15. a thick pipe; 16. a second adjustment mechanism; 17. a thin tube hexagonal fixing piece; 18. a middle tube hexagonal fixing piece; 19. rotating the handle hexagonal fixing piece; 2. a rotation mechanism; 21. a first thick tube rotating shaft; 22. a second thick tube rotating shaft; 23. a first wide tube turning handle; 24. a second wide tube turning handle; 3. a locking mechanism; 4. a folding mechanism; 41. a first rotating handle; 42. a second rotating handle; 43. a tension spring; 44. a spring mount; 45. rotating the handle sleeve; 46. the internal thread rotates the lid.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the utility model provides a hand crank that can accomodate, as shown in fig. 1, including crank body 1, crank body 1's lower extreme is provided with folding mechanism 4, crank body 1, be provided with locking mechanical system 3 between the folding mechanism 4, crank body 1 includes tubule 12, well pipe 13, thick pipe 15, rotatory handle hexagonal mounting 19, folding mechanism 4 includes first rotatory handle 41, with the rotatory handle 42 of first rotatory handle 41 vertically second, first rotatory handle 41 and rotatory handle hexagonal mounting 19, be provided with the fixed pin between the rotatory handle 42 of second, the lower extreme movable mounting of second rotatory handle 42 has internal thread rotatory lid 46, the inside symmetry of first rotatory handle 41 is provided with two spring mounting 44, be connected with expanding spring 43 between two spring mounting 44 of the inside of first rotatory handle 41.

A second adjusting mechanism 16 is arranged between the thick pipe 15 and the middle pipe 13, the lower end of the middle pipe 13 is fixedly connected with the upper end of the thick pipe 15 through the second adjusting mechanism 16, the crank body 1 further comprises a hand crank hook 11, and the lower end of the hand crank hook 11 is fixedly connected with the upper end of the thin pipe 12.

As shown in fig. 1, the hexagonal fixing element 19 of the rotary handle is fixed at the lower end of the thick pipe 15 through the locking mechanism 3, the fixing pin is inserted into the round holes at the two ends of the first rotary handle 41, so that the hexagonal fixing element 19 of the rotary handle and the second rotary handle 42 are installed at the two ends of the first rotary handle 41, the first rotary handle 41 and the second rotary handle 42 can be straightened through the matching of the telescopic spring 43 and the spring fixing element 44, the length of the hand crank can be increased, and the use is facilitated.

Optionally, as shown in fig. 2, a rotating mechanism 2 is arranged on the outer side of the bottom of the crank body 1, the rotating mechanism 2 includes a first thick pipe rotating shaft 21 and a second thick pipe rotating shaft 22, the first thick pipe rotating shaft 21 and the second thick pipe rotating shaft 22 are sleeved on the outer side of the thick pipe 15, the inner surface of the first thick pipe rotating shaft 21 and the inner surface of the second thick pipe rotating shaft 22 are movably connected with the outer surface of the thick pipe 15, a first thick pipe rotating shaft 21 and a first thick pipe rotating handle 23 and a second thick pipe rotating handle 24 are fixedly mounted on the outer sides of the second thick pipe rotating shaft 22, and the first thick pipe rotating handle 23 and the second thick pipe rotating handle 24 are axisymmetric with respect to the central axis of the thick pipe 15.

As shown in fig. 2, the first thick pipe rotating handle 23 and the second thick pipe rotating handle 24 can be rotated outside the thick pipe 15 by the first thick pipe rotating shaft 21 and the second thick pipe rotating shaft 22, so that the first thick pipe rotating handle 23 and the second thick pipe rotating handle 24 can be rotated conveniently during operation, and the operation is convenient.

Optionally, as shown in fig. 3, a first adjusting mechanism 14 is disposed between the tubule 12 and the middle tube 13, the first adjusting mechanism 14 includes a locking sleeve 141 and an internal thread locking rotating member 142, the locking sleeve 141 is an opening, the locking sleeve 141 is disposed outside the tubule 12, an upper side of the locking sleeve 141 is a circular shape, a lower side of the locking sleeve 141 is a dodecagonal shape, a bottom of the locking sleeve 141 is adapted to an inner surface of the middle tube 13 in shape, a section of the inner portion of the internal thread locking rotating member 142 is a trapezoid, an inner surface of the internal thread locking rotating member 142 is connected to an outer surface of the locking sleeve 141, an outer surface of the middle tube 13 is provided with a thread strip, and an inner surface of a lower portion of.

As shown in fig. 3, the locking sleeve 141 is sleeved outside the thin tube 12 and inserted into the middle tube 13, the internal thread locking rotating member 142 is sleeved outside the locking sleeve 141 and the middle tube 13, the bottom of the locking sleeve 141 is screwed on the upper end of the middle tube 13, the locking sleeve 141 can be locked outside the thin tube 12 due to the slope of the inner surface of the internal thread locking rotating member 142, and then the thin tube 12 and the middle tube 13 are connected, the height between the thin tube 12 and the middle tube 13 can be adjusted by loosening the internal thread locking rotating member 142, the locking sleeve 141 is in the shape of a twelve-angle flower with a circular upper side and a circular lower side, the lower side of the locking sleeve 141 is connected with the inner wall of a thick tube flower, the locking sleeve 141 is kept from rotating together with the internal thread locking rotating member 142 to cause the phenomenon that the tube is locked and the internal thread locking rotating member 142 is rotated during expansion and contraction, the height adjustment between, is convenient for people with different heights to use.

Optionally, as shown in fig. 4 and 5, a thin tube hexagonal fixing member 17 is disposed on the inner side of the middle tube 13 at the bottom of the thin tube 12, the inner side of the thick tube 15 at the bottom of the middle tube 13 is connected with the middle tube hexagonal fixing member 18, the internal tangent planes of the middle tube 13 and the thick tube 15 are both in a dodecagonal flower shape, the outer surface of the upper end of the thin tube hexagonal fixing member 17 is fixedly connected with the outer surface of the lower end of the thin tube 12, and the outer surface of the upper end of the middle tube hexagonal fixing member 18 is.

As shown in fig. 4 and 5, the bottom of the thin tube 12 can be locked by the thin tube hexagonal fixing part 17, so that the thin tube 12 is prevented from independently rotating inside the middle tube 13, the bottom of the middle tube 13 can be locked by the middle tube hexagonal fixing part 18, the middle tube 13 is prevented from independently rotating inside the thick tube 15, the fixing is firmer, and the transmission effect is better.

Alternatively, as shown in fig. 6, the hexagonal fixing piece 19 of the knob is fixed to the lower end of the wide tube 15 by the locking mechanism 3, and the structure of the locking mechanism 3 is the same as that of the first adjusting mechanism 14.

The two ends of the first rotating handle 41 are respectively connected with the rotating handle hexagonal fixing piece 19 and the second rotating handle 42 through fixing pins, the two ends of the extension spring 43 are fixedly connected with the spring fixing piece 44, the extension spring 43 is located at the center of the first rotating handle 41, the outer side of the second rotating handle 42 is movably provided with a rotating handle shaft sleeve 45, and the two spring fixing pieces 44 are respectively connected with the rotating handle hexagonal fixing piece 19 and the second rotating handle 42.

As shown in fig. 6, the hexagonal fixing part 19 of the rotary handle can be fixed at the lower end of the thick pipe 15 through the locking mechanism 3, the hexagonal fixing part 19 of the rotary handle is prevented from moving up and down during operation, the fixing is firm, the fixing pin is inserted into the round holes at the two ends of the first rotary handle 41, and then the hexagonal fixing part 19 of the rotary handle is made, the second rotary handle 42 is installed at the two ends of the first rotary handle 41, the first rotary handle 41 and the second rotary handle 42 can be straightened through the cooperation of the spring fixing part 44 and the telescopic spring 43, the length of the hand crank can be increased, the use is convenient, the friction force between the hand and the second rotary handle 42 during rotation can be reduced through the rotary handle shaft sleeve 45, the folding mechanism 4 is taken into the thick pipe 15 after the use is completed, the internal thread rotary cover 46 is screwed and locked, the occupied space of the hand crank is reduced, and the carrying is.

It should be noted that, the utility model relates to a hand crank that can accomodate, the user covers the locking cover 141 outside the tubule 12 and inserts in the well 13 inside, cover the internal thread locking rotating member 142 outside the locking cover 141 and well 13, make the bottom of the locking cover 141 twist on the upper end of well 13, and then make the tubule 12, well 13 connect, can adjust the height between the tubule 12, well 13 through loosening the internal thread locking rotating member 142, the second adjustment mechanism 16 is the same with the structure between the first adjustment mechanism 14, can adjust the height between well 13, thick pipe 15 through the second adjustment mechanism 16, can lock the bottom of the tubule 12 through the tubule hexagonal mounting 17, avoid the tubule 12 independently rotating in well 13 inside, and can lock the bottom of well 13 through well hexagonal mounting 18, avoid well 13 independently rotating in thick pipe 15 inside, fixed relatively firm, can fix rotatory handle hexagonal mounting 19 at the lower extreme of thick pipe 15 through locking mechanical system 3, avoid rotatory handle hexagonal mounting 19 drunkenness from top to bottom of during operation, insert the fixed pin in the round hole at first rotatory handle 41 both ends, and then make rotatory handle hexagonal mounting 19, the both ends at first rotatory handle 41 are installed to second rotatory handle 42, through expanding spring 43, spring mounting 44's cooperation can be with first rotatory handle 41, second rotatory handle 42 is flare-outed, can increase the length of hand handle, facilitate the use, use the inside of folding mechanism 4 income thick pipe 15 after accomplishing, screw up the locking with internal thread rotatory lid 46, reduce the space that hand handle occupy.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A hand crank that can accomodate, includes crank body (1), its characterized in that: a folding mechanism (4) is arranged at the lower end of the crank body (1), a locking mechanism (3) is arranged between the crank body (1) and the folding mechanism (4), the crank body (1) comprises a thin tube (12), a middle tube (13), a thick tube (15) and a hexagonal fixing piece (19) of a rotary handle, the folding mechanism (4) comprises a first rotating handle (41) and a second rotating handle (42) which is vertical to the first rotating handle (41), a fixed pin is arranged between the first rotating handle (41) and the hexagonal fixed part (19) of the rotating handle and between the first rotating handle and the second rotating handle (42), the lower end of the second rotating handle (42) is movably provided with an internal thread rotating cover (46), two spring fixing pieces (44) are symmetrically arranged inside the first rotating handle (41), an extension spring (43) is connected between the two spring fixing pieces (44) in the first rotating handle (41).

2. A stowable hand crank according to claim 1, characterized in that: the bottom outside of crank body (1) is provided with rotary mechanism (2), rotary mechanism (2) include first thick tub of axis of rotation (21), the thick tub of axis of rotation of second (22), the thick tub of axis of rotation of first thick tub of axis of rotation (21), the thick tub of axis of rotation of second (22) cover in the outside of thick tub of (15), the internal surface of the thick tub of axis of rotation of first thick tub of axis of rotation (21), the thick tub of axis of rotation of second (22) and the surface swing joint of thick tub of (15), the outside fixed mounting of the thick tub of axis of rotation of first thick tub of axis of rotation (21), the thick tub of axis of rotation of second (22) has first thick tub of rotation handle (23), the thick tub of rotation of second (24), first thick tub of rotation handle (23), the thick tub of second rotates handle (24) central line axis symmetry about thick tub of (15).

3. A stowable hand crank according to claim 1, characterized in that: be provided with first adjustment mechanism (14) between tubule (12), well pipe (13), first adjustment mechanism (14) are including locking cover (141), internal thread locking rotating member (142), locking cover (141) are the opening, locking cover (141) are in the outside of tubule (12), and the upside of locking cover (141) is circular downside for twelve angular flower type, locking cover (141) bottom and well pipe (13) internal surface shape looks adaptation, the inside tangent plane of internal thread locking rotating member (142) is trapezoidal, the internal surface of internal thread locking rotating member (142) and the surface connection of locking cover (141), the screw thread strip has been seted up to the surface of well pipe (13), and the internal surface of internal thread locking rotating member (142) lower part passes through threaded connection with the surface on well pipe (13) upper portion.

4. A stowable hand crank according to claim 1, characterized in that: be provided with second adjustment mechanism (16) between thick pipe (15) and well pipe (13), the lower extreme of well pipe (13) passes through the upper end fixed connection of second adjustment mechanism (16) and thick pipe (15), crank body (1) still includes hand crank hook (11), the lower extreme of hand crank hook (11) and the upper end fixed connection of tubule (12).

5. A stowable hand crank according to claim 1, characterized in that: the inboard of well pipe (13) in the bottom of tubule (12) is provided with tubule hexagonal mounting (17), and the inboard of the thick pipe of bottom (15) of well pipe (13) is connected with well pipe hexagonal mounting (18), the inside tangent plane of well pipe (13), thick pipe (15) is the dodecagonal flower type, the upper end surface of tubule hexagonal mounting (17) is connected with the lower extreme external fixed surface of tubule (12), and the upper end surface of well pipe hexagonal mounting (18) is connected with the lower extreme external fixed surface of well pipe (13).

6. A stowable hand crank according to claim 2, characterized in that: the hexagonal rotating handle fixing piece (19) is fixed at the lower end of the thick pipe (15) through a locking mechanism (3), and the structure of the locking mechanism (3) is the same as that of the first adjusting mechanism (14).

7. A stowable hand crank according to claim 4, characterized in that: the both ends of first rotatory handle (41) are connected with rotatory handle hexagonal mounting (19), the rotatory handle of second (42) through the fixed pin respectively, the both ends and the spring mounting (44) fixed connection of expanding spring (43), expanding spring (43) are located the central point of first rotatory handle (41) and put, the outside activity of the rotatory handle of second (42) is provided with rotatory handle axle sleeve (45), and two spring mounting (44) are connected with rotatory handle hexagonal mounting (19) and the rotatory handle of second (42) respectively.

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