CN216807661U - Winding and unwinding mechanism and winding and unwinding device - Google Patents

Abstract

The utility model provides a winding and unwinding mechanism and a winding and unwinding device, wherein the winding and unwinding mechanism comprises a frame body and a winding and unwinding unit, wherein the winding and unwinding unit is rotatably arranged on the frame body by taking a pivot center as a rotation center, the winding and unwinding mechanism structurally comprises a fixed limiting part and a movable limiting part which are arranged by taking the pivot center as the rotation center, and a support body connected between the fixed limiting part and the movable limiting part, the support body can change the inner diameter of a defined winding piece due to self adjustment, and the movable limiting part is detachably arranged on the support body to limit an accommodating space for accommodating the winding piece together with the fixed limiting part. According to the winding and unwinding mechanism, the winding piece is finally wound on the supporting body, so that the final inner diameter of the winding piece can be changed by adjusting the supporting body, and the applicability of the winding piece and the universality of the winding and unwinding mechanism are improved.

Description

Winding and unwinding mechanism and winding and unwinding device

Technical Field

The utility model relates to the technical field of pipe coiling devices, in particular to a winding and unwinding mechanism and further relates to a winding and unwinding device.

Background

In the production process, a tube coiling machine is usually used for facilitating the coiling and uncoiling of the hose.

The prior pipe coiling machine generally comprises a support frame and a roller which is pivotally arranged on the support frame. Fix the one end of hose on the roller bearing when using, through manpower or mechanical rotation roller bearing for the hose is convoluteed on the roller bearing, in order to realize collecting to the roller bearing.

When the hose needs to be released, the roller is operated to pivot reversely or the hose wound on the roller is pulled to be stretched under the action of external force. Compared with manual pipe coiling, the pipe coiling machine is convenient to operate and use, and can greatly save the labor intensity and working time of workers.

However, the existing tube rolling machine still has the following disadvantages:

when the hose is coiled, if different inner diameters are required to be formed, different types of pipe coiling machines are required, and the cost for purchasing equipment is increased.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a winding and unwinding mechanism, so as to increase the application range of the mechanism.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a receive unwinding mechanism, includes:

a frame body;

the winding and unwinding unit is rotatably arranged on the frame body by a pivoting center; the winding and unwinding unit comprises a fixed limiting part and a movable limiting part which are arranged by taking the pivoting center as a rotating center, and a supporting body connected between the fixed limiting part and the movable limiting part; the support body can change the inner diameter of the defined winding piece due to self adjustment; the movable limiting part is detachably arranged on the supporting body, so that an accommodating space for accommodating the winding piece is limited by the movable limiting part and the fixed limiting part.

Further, the supporting body comprises a plurality of supporting pieces connected between the fixed limiting part and the movable limiting part; a plurality of said supports are spaced about said pivot center; each support member has a radial sliding movement along the pivot center, which causes the inner diameter of the defined winding member to change.

Furthermore, a first sliding part which is arranged along the radial direction of the pivot center in a sliding manner and a first locking part which can lock the first sliding part on the fixed limiting part are arranged on the fixed limiting part; the movable limiting part is provided with a second sliding part which is arranged along the radial direction of the pivot center in a sliding manner, and a second locking part which can lock the second sliding part on the movable limiting part; the second sliding part is arranged corresponding to the first sliding part; at least one of the supporting members is connected between the corresponding first sliding member and the second sliding member.

Furthermore, the fixed limiting part is provided with a plurality of first connecting rods which radially extend along the pivot center, and a first connecting ring which is connected with the plurality of first connecting rods and takes the pivot center as the center; the first sliding part comprises a first sleeve sleeved on the first connecting rod, and the first locking part comprises a first screw penetrating through the side wall of the first sleeve and tightly pushing against the first connecting rod.

Further, the movable limiting part is provided with a plurality of second connecting rods which radially extend along the pivot center, and a second connecting ring which is connected with the plurality of second connecting rods and takes the pivot center as the center; the second sliding part comprises a second sleeve sleeved on the second connecting rod, and the second locking part comprises a second screw penetrating through the side wall of the second sleeve and tightly pushing against the second connecting rod.

Further, a sleeve is arranged on the second sliding part; the supporting piece comprises a supporting rod, one end of the supporting rod is fixedly connected to the first sliding piece, and the other end of the supporting rod penetrates through the third sleeve.

Furthermore, a handle is arranged on the fixed limiting part and/or the movable limiting part.

Further, the handle comprises a rocker parallel to the pivot center, and one end of the rocker is connected to the movable limiting part.

Furthermore, a restraining part is arranged on the fixed limiting part and/or the movable limiting part; the restraining part is configured to restrain one end of the restraining part on the fixed limiting part or the movable limiting part.

Compared with the prior art, the utility model has the following advantages:

(1) according to the winding and unwinding mechanism, the winding unit is rotatably arranged on the frame body, so that the winding unit can rotate around a pivot center, the winding unit comprises the fixed limiting part, the movable limiting part and the supporting body connected between the fixed limiting part and the movable limiting part, and the inner diameter of a winding piece wound on the supporting body can be changed through the adjustment of the supporting body, so that winding pieces with various diameters can be wound, and the winding pieces with different diameters can be unwound, so that the application range of the winding and unwinding mechanism is expanded; in addition, through with the spacing detachable setting of activity on the supporter, the coiling piece of treating unreeling is convenient for install, and is convenient for pull down the coiling piece that the rolling was accomplished from the supporter, can improve the application convenience of receiving unwinding mechanism, and the spacing portion of activity can be injectd the accommodating space who holds the coiling piece with fixed spacing portion, and can be convenient for inject the width of coiling piece.

(2) The support body comprises a plurality of support pieces connected between the fixed limiting part and the movable limiting part, and the support pieces are distributed at intervals around the pivot center, so that the integral arrangement is convenient, the adjusting mode is simple and convenient, and the inner diameter of the defined winding piece can be changed.

(3) The first sliding part slides along the radial direction of the pivot center, so that the distance between one end of the supporting part, which is connected with the fixed limiting part, and the pivot center can be conveniently adjusted; the support piece of at least one of the first sliding piece and the second sliding piece is connected between the corresponding first sliding piece and the second sliding piece, the fixed limiting part and the movable limiting part are connected through the support piece, the fixed limiting part, the movable limiting part and the support body can rotate together, and when the plurality of support pieces are connected with the fixed limiting part and the movable limiting part, the connection reliability of the fixed limiting part and the movable limiting part can be well improved, and the anti-torsion performance is good.

(4) The fixed limiting part is arranged and comprises a first connecting rod, the first sliding part comprises a first sleeve, the first sleeve is sleeved on the first connecting rod, the first sliding part can slide conveniently, the first sliding part can be locked and unlocked conveniently by arranging a first screw, and the sliding device is simple in structure and convenient to use.

(5) The movable limiting part comprises a second connecting rod, the second sliding part comprises a second sleeve, the second sleeve is sleeved on the second connecting rod, the second sliding part can slide conveniently, the second sliding part can be locked and unlocked conveniently by arranging a second screw, and the movable limiting part is simple in structure and convenient to use.

(6) The third sleeve is arranged on the second sliding part, so that the support rod can be conveniently connected between the fixed limiting part and the movable limiting part.

(7) Through setting up the handle, and the handle is the rocker, the coiling of coiling piece can be convenient for, and simple structure, convenient to use.

(8) The limiting part is arranged, so that the top end of the winding piece can be fixed on the winding and unwinding unit conveniently, and the winding piece can be wound conveniently.

The utility model also provides a winding and unwinding device, which comprises an unwinding unit and a winding unit, wherein at least one of the unwinding unit and the winding unit adopts the winding and unwinding mechanism.

The unwinding mechanism is adopted by at least one of the unwinding unit and the winding unit in the winding and unwinding device, so that the winding part can be conveniently released and wound into a smaller winding part, and the winding and unwinding device is simple in structure and convenient to use.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a winding and unwinding mechanism according to a first embodiment of the present invention at a viewing angle;

fig. 2 is a schematic structural diagram of the winding and unwinding mechanism from another view angle according to the first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a winding and unwinding device according to a second embodiment of the present invention;

description of reference numerals:

1. a winding and unwinding unit; 2. a frame body; 3. unreeling unit

101. Fixing the limiting part; 1011. a first slider; 1012. a first locking member; 1013. a first connecting ring; 1014. a first connecting rod; 102. a movable limiting part; 1021. a second slider; 10211. a second sleeve; 10212. a third sleeve; 1022. a second lock; 1023. a second connection ring; 1024. a second connecting rod; 103. a support body; 104. a handle; 105. a restraint section;

201. a first cross bar; 202. a second cross bar; 203. a first vertical bar; 2031. a first diagonal member; 204. a second vertical bar; 2041. a second diagonal member; 205. a fixing member; 206. a bearing; 207. a first pivot shaft; 208. a third cross bar;

301. a base; 302. a support pillar; 3021. a lap joint rod; 3022. a fixing member; 303. a fixing plate; 3031. Fixing a column; 304. a sliding plate; 305. a second pivot axis.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The embodiment relates to a winding and unwinding mechanism, which comprises a frame body 2 and a winding and unwinding unit 1. The winding and unwinding unit 1 is rotatably disposed on the frame body 2 with a pivot center, and includes a fixed limiting portion 101 and a movable limiting portion 102 disposed with the pivot center as the pivot center, and a support body 103 connected between the fixed limiting portion 101 and the movable limiting portion 102.

The support body 103 can change the inner diameter of the defined winding piece due to self adjustment, and the movable limiting part 102 is detachably arranged on the support body 103 to define an accommodating space for accommodating the winding piece with the fixed limiting part 101. By setting the support body 103 to be adjustable, the final inner diameter of the winding piece can be changed, and the applicability of the winding piece is improved.

Based on the above design concept, an exemplary structure of the winding and unwinding mechanism of the embodiment is as shown in fig. 1 and fig. 2, the support includes a first cross rod 201 and a second cross rod 202 which are spaced up and down and spaced left and right, a first vertical rod 203 and a second vertical rod 204 are arranged between the first cross rod 201 and the second cross rod 202 in parallel, and two ends of the first vertical rod 203 and the second vertical rod 204 are respectively formed on the first cross rod 201 and the second cross rod 202.

A first inclined rod 2031 is formed on the first vertical rod 203, the first inclined rod 2031 is obliquely arranged, the first inclined rod 2031 is opposite to the first vertical rod 203 in oblique direction, a second inclined rod 2041 is formed on the second vertical rod 204, the second inclined rod 2041 is obliquely arranged, the second inclined rod 2041 is opposite to the second vertical rod 204 in oblique direction, the first inclined rod 2031 and the second inclined rod 2041 are arranged in parallel, and a third cross rod 208 is connected to the bottom ends of the first inclined rod 2031 and the second inclined rod 2041. Second rail 202 and third rail 208 rest on the ground so that the stand rests smoothly.

The first vertical rod 203 and the second vertical rod 204 are both screwed with fixing pieces 205, each fixing piece 205 is connected with a bearing 206, and the central lines of the two bearings 206 are the same.

In addition, the fixed stopper 101 has four first connecting rods 1014 arranged to extend radially along the pivot center, the four first connecting rods 1014 are arranged in a cross shape, and a first pivot hole is formed at the pivot center, the first pivot hole being arranged centering on the pivot center. The first connecting rings 1013 are arranged centering on the pivot center, and the first connecting rings 1013 are welded at the positions near the distal ends of the first connecting rods 1014, respectively.

The movable limiting portion 102 has four second connecting rods 1024 radially extending along the pivot center, and the four second connecting rods 1024 are arranged in a cross shape, and a second pivot hole is formed at the pivot center, and the second pivot hole is arranged with the pivot center as the center. The second connection rings 1023 are arranged centering on the pivot center, and the second connection rings 1023 are welded at positions near the distal ends of the respective second connection rods 1024, respectively.

Of course, the number of the first connecting rods 1014 and the second connecting rods 1024 is not limited to four, and may be three, five, six, or other suitable numbers.

The left end of the first pivot shaft 207 is fixed in the bearing 206 on the first vertical rod 203, and penetrates through and is connected to the bearing 206 of the second vertical rod 204, and the first pivot shaft 207 penetrates through the first pivot hole and the second pivot hole respectively, so that the fixed limiting portion 101 and the movable limiting portion 102 can rotate around the first pivot shaft 207, and the difference is that the first pivot shaft 207 is welded in the first pivot hole and screwed in the second pivot hole, so that the movable limiting portion 102 can be detachably arranged on the first pivot shaft 207. The winding part to be unwound can be conveniently installed, the winding part after winding is conveniently detached from the support body 103, the application convenience of the winding and unwinding mechanism can be improved, meanwhile, the movable limiting part 102 and the fixed limiting part 102 can limit the accommodating space for accommodating the winding part, the width of the winding part after winding is conveniently limited, the width of the winding part is limited to the width of the accommodating space, and the distance between two opposite surfaces of the fixed limiting part 101 and the movable limiting part 102 is also the distance between two opposite surfaces of the fixed limiting part 101 and the movable limiting part 102.

In order to facilitate the arrangement of the supporting body 103, the fixed limiting portion 101 is provided with a first sliding member 1011 arranged to slide radially along the pivot center, and a first locking member 1012 for locking the first sliding member 1011 to the fixed limiting portion 101.

Specifically, in the present embodiment, the first sliding member 1011 includes a first sleeve, the first sleeve has a first threaded hole, and the first sleeve is sleeved on the first connecting rod 1014. The first locking member 1012 comprises a first screw, the first screw is screwed into the first threaded hole, and the first screw is pressed against the first connecting rod 1014, so that the first sleeve is locked on the first connecting rod 1014; the first screw is released from the first link 1014, causing the first sleeve to be unlocked from the first link 1014.

Meanwhile, the movable limiting part 102 is provided with a second slider 1021 arranged to slide along the radial direction of the pivot center, and a second locking piece 1022 capable of locking the second slider 1021 on the movable limiting part 102.

Specifically, in this embodiment, the second slider 1021 includes a second sleeve 10211, the second sleeve 10211 has a second threaded hole, and the second sleeve 10211 is disposed on the second connecting rod 1024. The second locking member 1022 includes a second screw, the second screw is screwed into the second threaded hole, and the second screw is tightly pressed against the second connecting rod 1024, so that the second sleeve 10211 is locked on the second connecting rod 1024; the second screw releases the tightening on the second connecting rod 1024 so that the second bushing 10211 releases the locking on the second connecting rod 1024.

The support body 103 includes a plurality of support members connected between the fixed position-limiting portion 101 and the movable position-limiting portion 102, the plurality of support members being spaced around the pivot center, each support member having a radial sliding movement along the pivot center to vary the inner diameter of the defined winding member. Specifically, a third sleeve 10212 is formed on the second slider 1021, and the second slider 1021 is disposed corresponding to the first slider 1011. The support member includes a support rod, one end of the support rod is welded and fixed to the first sliding member 1011, and the other end of the support rod is inserted into the third sleeve 10212.

Of course, the number of the first slider 1011 and the second slider 1021 may be different, so that a portion of the support rods may be arranged as described above, and another portion of the support rods may have one end welded to the first slider 1011 and the other end directly overlapping one side of the second connecting rod 1024. At least one second sliding part 1021 is provided, so that the fixed limiting part 101 and the movable limiting part 102 are relatively fixed, and when one part pivots, the other part pivots along with the other part. When the plurality of supporting pieces are connected with the fixed limiting part 101 and the movable limiting part 102, the connection reliability of the fixed limiting part 101 and the movable limiting part 102 can be better improved, and the anti-torsion performance is better.

In summary, the first sliding member 1011 and the first locking member 1012 are disposed on the fixed limiting portion, and the first sliding member 1011 slides along the radial direction of the pivot center, so as to facilitate adjustment of the distance from the pivot center to the end of the supporting member connected to the fixed limiting portion 101. The second slider 1021 and the second locking member 1022 are disposed on the movable limiting portion 102, and the second slider 1021 slides along the radial direction of the pivot center, so as to facilitate the adjustment of the distance from the pivot center to the end of the supporting member connected with the movable limiting portion 102. Since the winding member is wound on the support member after the winding is completed, the inner diameter of the winding member is 2 times the distance from the outer side of the side wall of the support member to the pivot center, and thus the distance from the support member to the pivot center, that is, the inner diameter of the winding member is changed.

In order to facilitate the pivoting of the winding and unwinding unit 1, to wind the hose into a winding member, the fixed limiting portion 101 is provided with a handle 104, or the movable limiting portion 102 is provided with a handle 104, or both the movable limiting portion 102 and the fixed limiting portion 101 are provided with handles 104. Preferably, the handle 104 includes a rocker parallel to the pivot center, and one end of the rocker is connected to the second connecting rod 1024 of the motion-limiting portion 102.

Finally, the fixed position-limiting portion 101 is provided with a restraining portion 105, or the movable position-limiting portion 102 is provided with a restraining portion 105, or both the fixed position-limiting portion 101 and the movable position-limiting portion 102 are provided with a restraining portion 105. The restraint portion 105 is configured to be able to restrain one end of the restraint member in a fixed state. Specifically, in the embodiment, the constraint portion 105 is disposed in a C shape, a second threaded hole is formed in the constraint portion 105, and a bolt passes through the second threaded hole and is screwed to the first connecting rod 1014, so that the constraint portion 105 is fixed on the fixed limiting portion 101.

According to the winding and unwinding mechanism, the support body 103 is arranged to be adjustable, so that the final inner diameter of the winding piece can be changed, the obtained winding piece can be used on different devices, and the applicability of the winding piece and the universality of the winding and unwinding mechanism are improved.

Example two

The embodiment relates to a winding and unwinding device, which comprises an unwinding unit 3 and a winding unit as shown in fig. 3, wherein the winding and unwinding mechanism in the first embodiment is adopted in the winding unit.

The unwinding unit 3 includes a base 301 and a pivoting member. The base 301 is plate-shaped, four supporting pillars 302 are formed on the base 301, and the supporting pillars 302 are arranged in parallel. The support posts 302 include two first support posts formed at a position near the rear end of the base 301 and two second support posts formed at a position near the front end of the base 301. A lapping rod 3021 is formed between the two first support columns, a lapping rod 3021 is formed between the two second support columns, and the two lapping rods 3021 are arranged in parallel. A lapping groove is formed in the middle of the lapping rod 3021, and the cross section of the lapping groove is fan-shaped.

Connecting holes are formed in two sides of the lap joint groove, and two ends of the arc-shaped fixing piece 3022 are penetrated through by bolts and are in threaded connection in the fixing holes, so that the fixing holes with circular cross sections are formed by enclosing the side walls of the fixing piece 3022 and the lap joint groove.

The pivoting member includes a fixed plate 303, a sliding plate 304, and a second pivoting shaft 305. The second pivot axis 305 is fixed at the center of the fixed plate 303, and two ends of the second pivot axis 305 are respectively disposed at two sides of the fixed plate 303. A plurality of fixing posts 3031 are formed on the fixing plate 303, the fixing posts 3031 are uniformly arranged around the axis of the second pivot 305, and threads are formed at the top ends of the fixing posts 3031.

A first jack is formed at the center of the sliding plate 304, and a plurality of second jacks are formed around the first jack. The diameter of the first insertion hole is the same as that of the second pivot shaft 305, the diameter of the second insertion hole is the same as that of the fixed column 3031, and each second insertion hole corresponds to each fixed column 3031 one to one.

When the unwinding unit is used, firstly, a winding piece to be unwound is sleeved on each fixed column 3031, then the second pivot shaft 305 is inserted into the first jack, and each fixed shaft is inserted into the corresponding second jack, at this time, the fixed plate 303 and the sliding plate 304 clamp the winding piece to be unwound in the middle, and the nut is screwed on each fixed column 3031, so that the nut is abutted against the sliding plate 304, and the sliding plate 304 can be fixed. Both ends of the second pivot shaft 305 are respectively inserted into the fixing holes. And finally, one end of the winding piece is led out and fixed on the winding unit through the constraint part. In this case, the large-roll winding member may be divided into a plurality of small-roll winding members, and the small-roll winding members may have different inner diameters.

Or the unwinding unit 3 adopts the unwinding and winding mechanism in the first embodiment, and the winding unit adopts the structure of the unwinding unit in the foregoing scheme, so that the winding members of large rolls with different inner diameters can be divided into a plurality of winding members of small rolls, but the inner diameters of the winding members of the small rolls are the same, but the unwinding mechanism can load the winding members of large rolls with different inner diameters.

Or, the winding unit and the unwinding unit 3 adopt the winding and unwinding mechanism in the first embodiment, at this time, the winding member of the large roll can be divided into a plurality of winding members of the small rolls, the inner diameters of the winding members of the small rolls can be different, and meanwhile, the unwinding unit can be provided with the winding members of the large rolls with different inner diameters.

According to the winding and unwinding device, at least one of the unwinding unit and the winding unit in the winding and unwinding device adopts the winding and unwinding mechanism, so that the winding part can be conveniently released and wound into the winding part with a smaller diameter, and the winding and unwinding device is simple in structure, easy to operate and convenient to use.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The utility model provides a receive unwinding mechanism which characterized in that includes:

a frame body (2);

the winding and unwinding unit (1) is rotatably arranged on the frame body (2) by a pivoting center; the winding and unwinding unit (1) comprises a fixed limiting part (101), a movable limiting part (102) and a support body (103), wherein the fixed limiting part (101) and the movable limiting part (102) are arranged by taking the pivoting center as a rotating center, and the support body is connected between the fixed limiting part (101) and the movable limiting part (102); the support (103) can change the inner diameter of the defined winding element due to self adjustment; the movable limiting part (102) is detachably arranged on the support body (103) to define an accommodating space for accommodating the winding piece with the fixed limiting part (101).

2. The winding and unwinding mechanism of claim 1, wherein:

the supporting body (103) comprises a plurality of supporting pieces connected between the fixed limiting part (101) and the movable limiting part (102); a plurality of said supports are spaced about said pivot center;

each support member has a radial sliding movement along the pivot center, which causes the inner diameter of the defined winding member to change.

3. The winding and unwinding mechanism of claim 2, wherein:

a first sliding part (1011) arranged in a sliding manner along the radial direction of the pivot center is arranged on the fixed limiting part (101), and a first locking part (1012) capable of locking the first sliding part (1011) on the fixed limiting part (101);

a second sliding piece (1021) which is arranged along the radial direction of the pivoting center in a sliding manner and a second locking piece (1022) which can lock the second sliding piece (1021) on the movable limiting part (102) are arranged on the movable limiting part (102); the second slider (1021) is arranged in correspondence with the first slider (1011);

at least one of said supports is connected between said corresponding first slider (1011) and said second slider (1021).

4. The winding and unwinding mechanism of claim 3, wherein:

the fixed limiting part (101) is provided with a plurality of first connecting rods (1014) which extend along the radial direction of the pivoting center, and a first connecting ring (1013) which is connected with the plurality of first connecting rods (1014) and takes the pivoting center as the center;

the first sliding part (1011) comprises a first sleeve sleeved on the first connecting rod (1014), and the first locking part (1012) comprises a first screw penetrating through the side wall of the first sleeve and tightly pushing against the first connecting rod (1014).

5. The winding and unwinding mechanism of claim 3, wherein:

the movable limiting part (102) is provided with a plurality of second connecting rods (1024) which extend along the radial direction of the pivoting center, and a second connecting ring (1023) which is connected with the second connecting rods (1024) and takes the pivoting center as the center;

the second slider (1021) comprises a second sleeve (10211) sleeved on the second connecting rod (1024), and the second locking piece (1022) comprises a second screw passing through the side wall of the second sleeve (10211) and tightly pushing against the second connecting rod (1024).

6. The winding and unwinding mechanism of claim 3, wherein:

a third sleeve (10212) is arranged on the second sliding piece (1021);

the supporting piece comprises a supporting rod, one end of the supporting rod is fixedly connected to the first sliding piece (1011), and the other end of the supporting rod penetrates through the third sleeve (10212).

7. The winding and unwinding mechanism of claim 1, wherein:

the fixed limiting part (101) and/or the movable limiting part (102) are/is provided with a handle (104).

8. The winding and unwinding mechanism of claim 7, wherein:

the handle (104) comprises a rocker parallel to the pivot center, and one end of the rocker is connected to the movable limiting part (102).

9. The winding and unwinding mechanism of any one of claims 1 to 8, wherein:

the fixed limiting part (101) and/or the movable limiting part (102) is/are provided with a restraining part (105); the restraining part (105) is configured to restrain one end of the winding member on the fixed restraining part (101) or the movable restraining part (102).

10. The utility model provides a receive unwinding device which characterized in that:

the winding and unwinding mechanism comprises an unwinding unit and a winding unit, wherein at least one of the unwinding unit and the winding unit adopts the winding and unwinding mechanism as claimed in any one of claims 1 to 9.

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