CN111167065B

CN111167065B - Skipping rope with adjustable length

Info

Publication number: CN111167065B
Application number: CN202010057676.XA
Authority: CN
Inventors: 黄好语
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2021-04-09
Anticipated expiration: 2040-01-19
Also published as: CN111167065A

Abstract

The invention provides a skipping rope with adjustable length, and belongs to the technical field of sports equipment. It has solved the current problem that the skipping rope length adjustment is inconvenient, poor stability. It includes rope and two handles, be equipped with the column cavity in at least one handle, wear to be equipped with the axis of rotation in the column cavity, the rear end of handle is equipped with adjusting part, be equipped with locking Assembly between adjusting part and the handle, the outer spiral groove has in the axis of rotation, the rope penetrates and twines in outer spiral groove by the front end of column cavity, the end and the axis of rotation of rope link firmly, constitute the threaded rod by axis of rotation and spiral winding rope above that, circumference location has the cover to establish the wire rope body that sets up on this threaded rod and with the threaded rod cooperation in the column cavity, be equipped with the inner spiral groove that sets up with the rope cooperation of spiral winding in outer spiral groove in the wire rope body, still be equipped with on the handle and just work when the axis of rotation rotates along self. The invention has the advantages of convenient adjustment, good stability and the like.

Description

Skipping rope with adjustable length

Technical Field

The invention belongs to the technical field of sports equipment, and relates to a skipping rope with adjustable length.

Background

The rope skipping sports are gradually favored by various sports enthusiasts as sports with lower cost and higher exercise efficiency. The traditional skipping rope comprises a rope and handles fixed at two ends of the rope, most of the skipping rope does not have the length adjusting function, and the skipping rope cannot be well suitable for people with different heights. Therefore, some skipping ropes with adjustable lengths are mentioned in the prior art, and most of the skipping ropes are wound by rotating shafts or gears, and the rotating shafts or the gears are not provided with pressing devices in the winding process, so that the ropes are loosely wound and are irregular.

Therefore, the Chinese patent discloses a skipping rope with adjustable length [ No. CN209848208U of authority bulletin ], which comprises a rope and handles at two ends of the rope, wherein an end cover at the top of each handle is rotatably arranged on the upper part of each handle, a lead screw is fixedly connected to the bottom of each end cover, an inner hole of each handle is a hexagonal hole column, a hexagonal nut is sleeved on each lead screw and matched with the inner hole of each handle, the rope penetrates through a rope penetrating hole, the rope is wound on the lead screw above the hexagonal nut, the end part of the rope penetrates through the rope penetrating hole in the hexagonal nut, and the end part of the rope.

Although it can wind the rope tightly, the following problems still exist: 1. because the locking mechanism is not arranged, the rope bears axial force during rope skipping, the lead screw is easy to rotate under the tension of the rope, and the effective length of the rope is lengthened; 2. the rope has the flexibility, and the rope can not be initiatively worn out from the wire rope handling hole when the lead screw rotates, needs external force to pull, operates inconveniently.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a skipping rope with adjustable length, which is convenient to adjust and good in stability.

The purpose of the invention can be realized by the following technical scheme:

a skipping rope with adjustable length comprises a solid rope and two handles which are respectively arranged at two ends of the rope, wherein at least one handle is internally provided with a cylindrical cavity which extends along the length direction of the handle, a rotating shaft which is coaxial with the handle is arranged in the cylindrical cavity in a penetrating way, the rear end of the handle is provided with an adjusting component which is used for driving the rotating shaft to rotate along the self central axis, a locking component is arranged between the adjusting component and the handle, the rotating shaft is provided with an outer spiral groove, the rope penetrates through the front end of the cylindrical cavity and is wound in the outer spiral groove, the tail end of the rope is fixedly connected with the rotating shaft, the rope wound on the rotating shaft and the spiral groove forms a threaded rod, a rope guide body which is sleeved on the threaded rod and is matched with the threaded rod is circumferentially positioned in the cylindrical cavity, and the rope guide body is internally provided with an inner spiral groove which is matched with the rope wound in the outer, the handle is also provided with a traction assembly which works when the rotating shaft rotates along the central axis of the rotating shaft.

The inner spiral groove is spirally extended to the rear end of the rope guide body from the front end of the rope guide body, the length of the rope guide body is smaller than that of the rotating shaft, the length of the rope guide body is about 1/6-1/3 of the length of the rotating shaft, and the tail end of the rope is fixedly connected with the rotating shaft. When length needs to be lengthened, the locking assembly is loosened, the rotating shaft is driven to rotate in the forward direction through the adjusting assembly, and the rotating process is that the rope guide body can only move axially along the rotating shaft from front to back due to the fact that the rope guide body is circumferentially positioned and the rotating shaft is axially positioned, the rope located at the front end of the rope guide body is gradually separated from the outer spiral groove, the rope stretches out from the front end of the handle under the action of the traction assembly, the length of the whole skipping rope is lengthened, and the adjusting assembly is locked through the locking assembly after the adjusting assembly is in place. When the length needs to be shortened, the rotating shaft is driven to rotate reversely through the adjusting component, the rope is synchronously pulled into the cylindrical cavity under the action of the pulling component, the rope is wound into the outer spiral groove by matching with the rope guiding body through axial movement from back to front, the purpose of shortening the length of the skipping rope is achieved, and the adjusting component is locked through the locking component after the adjusting is in place.

In order to realize linking firmly the rope end, the radial hole that aperture and rope external diameter equal is seted up to the rearmost end of helicla flute outward, inserts the end of rope radial hole and through glue, screw etc. fixed, guarantees that the rope can not drop. Wherein, the section of the outer spiral groove is semicircular, and the radius of the outer spiral groove is equal to that of the rope; the section of the inner spiral groove is semicircular, and the radius of the inner spiral groove is equal to that of the rope.

In the skipping rope with the adjustable length, the front end of the columnar cavity is provided with the front cover plate, the front cover plate is provided with a first rope threading hole communicated with the columnar cavity, the front part of the front cover plate is provided with the front cover cap, the traction assembly is arranged in the front cover cap, the middle part of the front end of the front cover cap is provided with a second rope threading hole, and the rope is sequentially penetrated through the second rope threading hole and the first rope threading hole and then is wound in the outer spiral groove. The front cover plate plays a role in axial limiting and supporting the rotating shaft, and the first rope threading hole is eccentrically arranged relative to the front cover plate and cannot conflict with the rotating shaft. The front cover can protect the traction assembly, the front cover can be connected to the handle in a threaded mode, the front cover and the handle can be integrally formed, and stability is good.

In the skipping rope with the adjustable length, a first penetrating hole is formed in the middle of the front cover plate, the front end of the rotating shaft penetrates through the first penetrating hole and extends into the front cover, a first supporting seat and a second supporting seat which are positioned in the front cover and arranged oppositely are fixed on the front cover plate, and a third supporting seat and a fourth supporting seat which are parallel to the first supporting seat and the second supporting seat are fixed on the front cover plate; the traction assembly comprises a worm wheel coaxially fixed on the rotating shaft, a worm which is arranged on the first supporting seat and the second supporting seat in a penetrating mode and can rotate along the central axis of the worm, a gear coaxially fixedly connected to the worm, and a driving roller and a driven roller which are arranged between the third supporting seat and the fourth supporting seat in a penetrating mode respectively, the worm is matched with the worm wheel to be arranged, the driving roller is parallel to the driven roller, the distance between the driving roller and the driven roller is slightly smaller than the diameter of a rope, and the driving roller is provided with a meshing tooth part which is arranged in a meshing mode with the gear.

The rope penetrates through the rope penetrating hole II, penetrates through the driving roller and the driven roller, penetrates through the rope penetrating hole I and then is wound in the outer spiral groove. When the rotating shaft rotates forwards, the worm wheel is driven to rotate forwards, the worm wheel is matched with the worm to drive the worm to rotate, the gear is coaxially fixed on the worm, the gear is driven to rotate, the gear is meshed with the meshing tooth part, the driving roller is driven to rotate, and the distance between the driving roller and the driven roller is slightly smaller than the diameter of the rope. The driving roller and the driven roller can rotate along the central axis of the driving roller and the driven roller, small bearings are arranged between the rotating shaft and the front cover plate for flexible rotation, the small bearings are arranged between the worm and the first supporting seat and the second supporting seat, and the small bearings are arranged between the driving roller and the third supporting seat and between the driven roller and the fourth supporting seat. When the rotating shaft rotates reversely, the driving roller and the driven roller extrude the rope, and the rope moves backwards under the action of friction force. Enough space is reserved in the front cover, so that the rope is prevented from interfering with a worm wheel, a worm, a gear and the like in the moving process, and the smooth movement of the rope is guaranteed.

In the skipping rope with the adjustable length, the front end of the rotating shaft is provided with a first connecting shaft which is coaxially arranged with the rotating shaft, the first connecting shaft penetrates through the first penetrating hole, and the worm wheel is coaxially and fixedly connected to the first connecting shaft. The outer diameter of the first connecting shaft is smaller than that of the rotating shaft, a small bearing is conveniently arranged between the first connecting shaft and the front cover plate, and the outer diameter of the first connecting shaft is smaller than that of the rotating shaft, so that the rotating shaft can be conveniently axially positioned.

In the skipping rope with the adjustable length, the rear end of the columnar cavity is provided with the rear cover plate, the middle of the rear cover plate is provided with a second penetrating hole, the rear end of the rotating shaft penetrates out of the second penetrating hole, the adjusting assembly comprises a hand wheel arranged at the rear end of the rotating shaft, and the locking assembly is arranged between the hand wheel and the rear cover plate.

In the skipping rope with the adjustable length, the rear end of the rotating shaft is provided with a second connecting shaft which is coaxial with the rotating shaft, the second connecting shaft penetrates through the second penetrating hole, and the hand wheel is arranged on the second connecting shaft. The outer diameter of the second connecting shaft is smaller than that of the rotating shaft, a small bearing is conveniently arranged between the second connecting shaft and the rear cover plate, and the outer diameter of the second connecting shaft is smaller than that of the rotating shaft, so that the rotating shaft can be conveniently axially positioned.

In foretell jump rope with adjustable length, the rear portion of back shroud has the back shroud, connecting axle two stretch into the back shroud, the middle part of back shroud has the hole three of wearing with the coaxial setting of connecting axle two, the hand wheel be located the rear portion of back shroud and have the portion of wearing to establish of wearing to wear to establish in the hole three on the hand wheel, locking component locate and wear to establish between portion and the back shroud, wear to establish and be equipped with anti-disengaging structure between portion and the back shroud.

In foretell skipping rope with adjustable length, the cross-section of connecting axle two is regular polygon, wear out hole three and be regular polygon, the cross-section of wearing to establish the portion is circular and tangent with the internal surface of wearing to establish hole three, locking Assembly including locate wear to establish in the portion with the spacing hole of connecting axle two cooperation settings, locate wear to establish the portion with wear to establish spacing portion and the cover that three cooperations of hole set up establish the elastic component on connecting axle two, the front end of elastic component supports and leans on the back shroud, its rear end supports and leans on in wearing to establish the portion the effect of elastic component down spacing portion with wear three cooperations in the hole.

The elastic piece is a spring, the limiting part is matched with the third penetrating hole under the action of the elastic force of the spring, and the hand wheel cannot rotate at the moment. The cross section of the limiting hole is a regular polygon, and the cross section of the limiting part is a regular polygon. The hand wheel is pushed forwards, the spring is compressed, the limiting part is separated from the through hole III, the hand wheel can rotate freely at the moment, and when the hand wheel rotates, the rotating shaft can be driven to rotate around the central axis of the hand wheel due to the matching effect of the limiting hole and the connecting shaft II. After the axial force acting on the hand wheel is loosened, the penetrating part can reset under the action of the elastic part, and self-locking is realized.

In the skipping rope with the adjustable length, the anti-falling structure comprises an annular step arranged on the penetrating part, and the annular step is abutted against the rear cover under the action of the elastic part. The rear cover cap protects the locking assembly, can be connected to the handle in a threaded manner, and can also be integrally formed with the handle.

In the skipping rope with the adjustable length, the side wall of the cylindrical cavity is provided with a limit groove extending axially, and the rope guide body is provided with a limit bulge extending into the limit groove. Can restrict the circumferential direction of the conductor rope body through spacing groove and spacing arch, can set up a plurality ofly with the spacing groove, spacing bellied quantity equals with the quantity of spacing groove on the conductor rope body.

Compared with the prior art, this skipping rope with adjustable length has following advantage: due to the traction assembly, when the rotating shaft rotates, the traction assembly can realize the traction action of the rope, the rope can be more easily wound and unwound, and the operation is convenient; due to the fact that the locking assembly is arranged, the rotating shaft can be effectively and automatically locked, and the stability of the rope in the using state is improved.

Drawings

FIG. 1 is a partial cross-sectional view of a handle in accordance with a preferred embodiment of the present invention.

Fig. 2 is a full sectional view of the handle in the preferred embodiment provided by the present invention.

Fig. 3 is another state of use view of the handle of fig. 1 provided by the present invention.

Fig. 4 is a cross-sectional view of a rotatable shaft provided by the present invention in engagement with a cord guide.

Fig. 5 is an exploded view of the rotating shaft and the rope guide provided by the present invention.

Fig. 6 is a cross-sectional view a-a of fig. 1 in accordance with the present invention.

Fig. 7 is a cross-sectional view at B-B of fig. 1 in accordance with the present invention.

In the figure, 1, a rope; 2. a handle; 3. a columnar cavity; 4. a rotating shaft; 5. an outer spiral groove; 6. a rope guide body; 7. an inner spiral groove; 8. a front cover plate; 9. a first stringing hole; 10. a front cover; 11. a second stringing hole; 12. a first supporting seat; 13. a second supporting seat; 14. a third supporting seat; 15. a fourth supporting seat; 16. a worm gear; 17. a worm; 18. a gear; 19. a drive roll; 20. a driven roller; 21. meshing the tooth parts; 22. a first connecting shaft; 23. a rear cover plate; 24. a hand wheel; 25. a second connecting shaft; 26. a rear cover; 27. a penetration part; 28. a limiting hole; 29. a limiting part; 30. an elastic member; 31. an annular step; 32. a limiting groove; 33. a limiting bulge; 34. a radial bore.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

The skipping rope with adjustable length comprises a solid rope 1 and two handles 2 respectively arranged at two ends of the rope 1, as shown in figures 1 and 2, a columnar cavity 3 extending along the length direction is arranged in one handle 2, a rotating shaft 4 coaxially arranged with the handle 2 is arranged in the columnar cavity 3 in a penetrating manner, an adjusting component for driving the rotating shaft 4 to rotate along the self central axis is arranged at the rear end of the handle 2, a locking component is arranged between the adjusting component and the handle 2, as shown in figure 3, an outer spiral groove 5 is arranged on the rotating shaft 4, the rope 1 penetrates through the front end of the columnar cavity 3 and is wound in the outer spiral groove 5, the tail end of the rope 1 is fixedly connected with the rotating shaft 4, a threaded rod is formed by the rotating shaft 4 and the rope 1 spirally wound on the threaded rod, a rope guide body 6 sleeved on the threaded rod in a positioning manner in the inner circumferential direction of the columnar cavity 3 and matched with the threaded rod, an inner spiral groove 7 matched with the rope 1 spirally wound in the outer spiral groove, the handle 2 is also provided with a traction component which works when the rotating shaft 4 rotates along the central axis of the rotating shaft.

As shown in fig. 5, the inner spiral groove 7 spirally extends from the front end of the rope guide 6 to the rear end of the rope guide 6, the length of the rope guide 6 is smaller than the length of the rotating shaft 4, and the length of the rope guide 6 is 1/6 of the length of the rotating shaft 4. In order to realize linking firmly the end of rope 1, as shown in fig. 4 and 5, the radial hole 34 that aperture and 1 external diameter of rope equal is seted up at the rearmost end of outer helicla flute 5, inserts radial hole 34 with the end of rope 1 and fixes through glue, screw etc. and guarantee that rope 1 can not drop. Wherein, the section of the outer spiral groove 5 is semicircular, and the radius of the outer spiral groove is equal to that of the rope 1; the inner spiral groove 7 has a semicircular cross section, and the radius thereof is equal to that of the rope 1.

Because the end of the rope 1 is fixedly connected with the rotating shaft 4, after the rope guide body 6 is connected, the rope 1 which is positioned between the rope guide body 6 and the end of the rope 1 and is wound in the outer spiral groove 5 is fixed through the rope guide body 6. When length needs to be lengthened, the locking assembly is loosened, the rotating shaft is driven to rotate in the forward direction by the adjusting assembly, the rotating process is realized through the circumferential positioning of the rope guide body 6 and the axial positioning of the rotating shaft 4, the rope guide body 6 can only move axially along the rotating shaft 4 from front to back, the rope 1 at the front end of the rope guide body 6 gradually deviates from the outer spiral groove 5, the rope 1 stretches out from the front end of the handle 2 under the action of the traction assembly, the length of the whole skipping rope is lengthened, and the adjusting assembly is locked by the locking assembly after the adjustment is in place. When the length needs to be shortened, the rotating shaft 4 is driven to rotate reversely by the adjusting component, the rope 1 is synchronously pulled into the cylindrical cavity 3 under the action of the pulling component, the rope 1 is wound into the outer spiral groove 5 by the axial movement of the guide rope body 6 from back to front, the purpose of shortening the length of the skipping rope is achieved, and the adjusting component is locked by the locking component after the adjusting is in place.

As shown in fig. 1-3, the front end of the cylindrical cavity 3 has a front cover plate 8, the front cover plate 8 has a first rope threading hole 9 communicated with the cylindrical cavity 3, the front part of the front cover plate 8 has a front cover cap 10, the traction assembly is arranged in the front cover cap 10, the middle part of the front end of the front cover cap 10 has a second rope threading hole 11, and the rope 1 is threaded through the second rope threading hole 11 and the first rope threading hole 9 in sequence and then wound in the outer spiral groove 5. The front cover plate 8 plays a role in axial limiting and supporting the rotating shaft 4, and the first rope threading hole 9 is eccentrically arranged relative to the front cover plate 8 and cannot conflict with the rotating shaft 4. The front cover 10 can protect the traction assembly, the front cover 10 can be connected to the handle 2 in a threaded mode, the front cover 10 and the handle 2 can be integrally formed, and stability is good.

The middle part of the front cover plate 8 is provided with a first penetrating hole, the front end of the rotating shaft 4 penetrates through the first penetrating hole and extends into the front cover 10, as shown in fig. 6, a first supporting seat 12 and a second supporting seat 13 which are positioned in the front cover 10 and are oppositely arranged are fixed on the front cover plate 8, and as shown in fig. 1-3, a third supporting seat 14 and a fourth supporting seat 15 which are parallel to the first supporting seat 12 and the second supporting seat 13 are fixed on the front cover 10. As shown in fig. 1-3 and 6-7, the traction assembly includes a worm wheel 16 coaxially fixed on the rotating shaft 4, a worm 17 coaxially disposed on the first support seat 12 and the second support seat 13 and capable of rotating along the central axis thereof, a gear 18 coaxially fixed on the worm 17, and a driving roller 19 and a driven roller 20 respectively disposed between the third support seat 14 and the fourth support seat 15, the worm 17 and the worm wheel 16 are cooperatively disposed, the driving roller 19 is parallel to the driven roller 20, and the distance between the driving roller 19 and the driven roller 20 is slightly smaller than the diameter of the rope 1, in this embodiment, the distance between the driving roller 19 and the driven roller 20 is smaller than the diameter of the rope skipping by 1mm, and the driving roller 19 has an engaging tooth portion 21 engaged with the gear 18.

As shown in fig. 1 to 3, the rope 1 is threaded through the second threading hole 11, passes through the driving roller 19 and the driven roller 20, is then threaded through the first threading hole 9, and is wound in the outer spiral groove 5. When the rotating shaft 4 rotates forwards, the worm wheel 16 is driven to rotate forwards, the worm wheel 16 is matched with the worm 17 to drive the worm 17 to rotate, the gear 18 is coaxially fixed on the worm 17, the gear 18 rotates, the gear 18 is meshed with the meshing tooth part 21 to drive the driving roller 19 to rotate, the distance between the driving roller 19 and the driven roller 20 is slightly smaller than the diameter of the rope 1, and when the driving roller 19 rotates, the rope 1 is driven to move forwards through the friction force between the driving roller 19 and the rope 1, so that the purpose of traction is achieved. The driving roller 19 and the driven roller 20 can rotate along the central axis of the driving roller and the driven roller, the small bearings are arranged between the rotating shaft 4 and the front cover plate 8, the small bearings are arranged between the worm 17 and the first supporting seat 12 and the second supporting seat 13, and the small bearings are arranged between the driving roller 19 and the driven roller 20 and the third supporting seat 14 and the fourth supporting seat 15 for flexible rotation. When the rotation shaft 4 rotates in the reverse direction, the driving roller 19 and the driven roller 20 press the rope 1, and the rope 1 moves backward by the friction force. Enough space is reserved in the front cover 10, so that the rope 1 is prevented from interfering with the worm wheel 16, the worm 17, the gear 18 and the like in the moving process, and the rope 1 is guaranteed to move smoothly.

As shown in fig. 4 and 5, the front end of the rotating shaft 4 is provided with a first connecting shaft 22 coaxially arranged with the rotating shaft 4, the first connecting shaft 22 is inserted into the first through hole, and the worm wheel 16 is coaxially and fixedly connected to the first connecting shaft 22. The outer diameter of the first connecting shaft 22 is smaller than that of the rotating shaft 4, so that a small bearing is conveniently arranged between the first connecting shaft 22 and the front cover plate 8, and the outer diameter of the first connecting shaft 22 is smaller than that of the rotating shaft 4, so that the rotating shaft 4 can be conveniently axially positioned.

As shown in fig. 1-3, the rear end of the cylindrical cavity 3 has a rear cover plate 23, the middle portion of the rear cover plate 23 has a second through hole, the rear end of the rotating shaft 4 passes through the second through hole, the adjusting assembly includes a hand wheel 24 disposed on the rear end of the rotating shaft 4, and the locking assembly is disposed between the hand wheel 24 and the rear cover plate 23.

As shown in fig. 4 and 5, the rear end of the rotating shaft 4 is provided with a second connecting shaft 25 coaxially arranged with the rotating shaft 4, the second connecting shaft 25 is inserted into the second insertion hole, and the hand wheel 24 is arranged on the second connecting shaft 25. The outer diameter of the second connecting shaft 25 is smaller than that of the rotating shaft 4, so that a small bearing is conveniently arranged between the second connecting shaft 25 and the rear cover plate 23, and the outer diameter of the second connecting shaft 25 is smaller than that of the rotating shaft 4, so that the rotating shaft 4 can be conveniently axially positioned.

As shown in fig. 1 to 3, a rear cover 26 is provided at the rear portion of the rear cover plate 23, the second connecting shaft 25 extends into the rear cover 26, a third through hole coaxially provided with the second connecting shaft 25 is provided at the middle portion of the rear cover 26, the hand wheel 24 is located at the rear portion of the rear cover 26, a through portion 27 penetrating the third through hole is provided on the hand wheel 24, the locking assembly is provided between the through portion 27 and the rear cover plate 23, and an anti-disengaging structure is provided between the through portion 27 and the rear cover 26. In this embodiment, the cross section of the second connecting shaft 25 is a regular polygon, the third through hole is a regular polygon, and the cross section of the penetrating portion 27 is circular and tangent to the inner surface of the third through hole. As shown in fig. 4, the locking assembly includes a limiting hole 28 disposed in the penetrating portion 27 and configured to cooperate with the second connecting shaft 25, a limiting portion 29 disposed on the penetrating portion 27 and configured to cooperate with the third penetrating hole, and an elastic member 30 sleeved on the second connecting shaft 25, a front end of the elastic member 30 abuts against the rear cover plate 23, a rear end of the elastic member abuts against the penetrating portion 27, and the limiting portion 29 cooperates with the third penetrating hole under the action of the elastic member 30.

In this embodiment, the elastic member 30 is a spring, and the limiting portion 29 is engaged with the third through hole under the action of the elastic force of the spring, so that the hand wheel 24 cannot rotate at this time. The cross section of the stopper hole 28 is a regular polygon, and the cross section of the stopper portion 29 is a regular polygon. The hand wheel 24 is pushed forwards, the spring is compressed, the limiting part 29 is separated from the third penetrating hole, the hand wheel 24 can rotate freely at the moment, and when the hand wheel 24 rotates, the rotating shaft 4 can be driven to rotate around the central axis of the hand wheel due to the matching effect of the limiting hole 28 and the connecting shaft II 25. After the axial force acting on the hand wheel 24 is released, the penetrating part 27 can reset under the action of the elastic part 30, and self-locking is realized.

As shown in fig. 4, the retaining structure includes an annular step 31 provided on the through portion 27, and the annular step 31 abuts against the rear cover 26 under the action of the elastic member 30. The rear cover 26 protects the locking assembly, the rear cover 26 may be threadably attached to the handle 2, or the rear cover 26 may be integrally formed with the handle 2.

As shown in fig. 1 to 3, the sidewall of the cylindrical cavity 3 has an axially extending limiting groove 32, and the rope guiding body 6 has a limiting protrusion 33 extending into the limiting groove 32. Can restrict the circumferential direction of the conductor rope body 6 through spacing groove 32 and spacing arch 33, can set up a plurality ofly with spacing groove 32, the quantity of spacing arch 33 equals with the quantity of spacing groove 32 on the conductor rope body 6.

Example two

The structure principle of the embodiment is basically the same as that of the embodiment I, and the difference lies in that the skipping rope with the adjustable length comprises a solid rope 1 and two handles 2 respectively arranged at two ends of the rope 1, columnar cavities 3 extending along the length direction of the two handles 2 are respectively arranged in the two handles 2, a rotating shaft 4 coaxially arranged with the handles 2 is arranged in the columnar cavities 3 in a penetrating way, an adjusting component for driving the rotating shaft 4 to rotate along the self central axis is arranged at the rear end of the handle 2, a locking component is arranged between the adjusting component and the handles 2, an outer spiral groove 5 is arranged on the rotating shaft 4, the rope 1 penetrates through the front end of the columnar cavity 3 and is wound in the outer spiral groove 5, the tail end of the rope 1 is fixedly connected with the rotating shaft 4, a threaded rod is formed by the rotating shaft 4 and the rope 1 spirally wound thereon, a rope guide 6 sleeved on the threaded rod and matched with the threaded rod is positioned, an inner spiral groove 7 matched with the rope 1 spirally wound in the outer spiral groove 5 is arranged in the rope guide body 6, and a traction assembly which works when the rotating shaft 4 rotates along the central axis of the handle 2 is also arranged on the handle.

During the regulation, can select to operate one of them handle 2, also can all operate two handles 2, make the adjustment range maximize of skipping rope.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The utility model provides a skipping rope with adjustable length, includes solid rope (1) and two handle (2) of locating rope (1) both ends respectively, at least one handle (2) in be equipped with column cavity (3) that extend along its length direction, column cavity (3) in wear to be equipped with axis of rotation (4) with the coaxial setting of handle (2), the rear end of handle (2) is equipped with and is used for driving axis of rotation (4) along self axis pivoted adjusting part, adjusting part and handle (2) between be equipped with locking Assembly, its characterized in that, axis of rotation (4) on have outer spiral groove (5), rope (1) penetrate and twine in outer spiral groove (5) by the front end of column cavity (3), the end and axis of rotation (4) of rope (1) link firmly, constitute by axis of rotation (4) and spiral rope (1) on it, a rope guide body (6) which is sleeved on the threaded rod and is matched with the threaded rod is positioned in the cylindrical cavity (3) in the circumferential direction, an inner spiral groove (7) which is matched with the rope (1) spirally wound in the outer spiral groove (5) is arranged in the rope guide body (6), and a traction assembly which works when the rotating shaft (4) rotates along the central axis of the handle (2) is further arranged on the handle; the front end of the columnar cavity (3) is provided with a front cover plate (8), the front cover plate (8) is provided with a first rope threading hole (9) communicated with the columnar cavity (3), the front part of the front cover plate (8) is provided with a front cover cap (10), the traction assembly is arranged in the front cover cap (10), the middle part of the front end of the front cover cap (10) is provided with a second rope threading hole (11), and the rope (1) is sequentially penetrated through the second rope threading hole (11) and the first rope threading hole (9) and then wound in the outer spiral groove (5); a first through hole is formed in the middle of the front cover plate (8), the front end of the rotating shaft (4) penetrates through the first through hole and extends into the front cover (10), a first supporting seat (12) and a second supporting seat (13) which are positioned in the front cover (10) and arranged oppositely are fixed on the front cover plate (8), and a third supporting seat (14) and a fourth supporting seat (15) which are parallel to the first supporting seat (12) and the second supporting seat (13) are fixed on the front cover (10); traction assembly including coaxial fixation worm wheel (16) on axis of rotation (4), wear to establish can follow self axis pivoted worm (17), coaxial gear (18) of linking firmly on worm (17) on supporting seat one (12) and supporting seat two (13) and wear to establish drive roll (19) and driven voller (20) between supporting seat three (14) and supporting seat four (15) respectively, worm (17) and worm wheel (16) cooperation set up, drive roll (19) be parallel with driven voller (20), and the distance between drive roll (19) and driven voller (20) slightly is less than the diameter of rope (1), drive roll (19) on have meshing tooth portion (21) that set up with gear (18) meshing.

2. The skipping rope with adjustable length as claimed in claim 1, wherein the front end of the rotating shaft (4) is provided with a first connecting shaft (22) coaxially arranged with the rotating shaft (4), the first connecting shaft (22) is inserted into the first through hole, and the worm wheel (16) is coaxially connected to the first connecting shaft (22).

3. The skipping rope with the adjustable length as claimed in claim 1 or 2, wherein the rear end of the cylindrical cavity (3) is provided with a rear cover plate (23), the middle part of the rear cover plate (23) is provided with a second through hole, the rear end of the rotating shaft (4) penetrates out of the second through hole, the adjusting component comprises a hand wheel (24) arranged on the rear end of the rotating shaft (4), and the locking component is arranged between the hand wheel (24) and the rear cover plate (23).

4. The skipping rope with adjustable length as claimed in claim 3, wherein the rear end of the rotating shaft (4) is provided with a second connecting shaft (25) coaxially arranged with the rotating shaft (4), the second connecting shaft (25) is inserted into the second through hole, and the hand wheel (24) is arranged on the second connecting shaft (25).

5. The skipping rope with the adjustable length according to claim 4, wherein the rear portion of the rear cover plate (23) is provided with a rear cover (26), the connecting shaft II (25) extends into the rear cover (26), the middle portion of the rear cover (26) is provided with a third penetrating hole coaxially arranged with the connecting shaft II (25), the hand wheel (24) is positioned at the rear portion of the rear cover (26) and the hand wheel (24) is provided with a penetrating portion (27) penetrating through the third penetrating hole, the locking assembly is arranged between the penetrating portion (27) and the rear cover plate (23), and an anti-falling structure is arranged between the penetrating portion (27) and the rear cover (26).

6. The skipping rope with the adjustable length according to claim 5, wherein the cross section of the second connecting shaft (25) is a regular polygon, the third penetrating hole is a regular polygon, the cross section of the penetrating portion (27) is circular and tangent to the inner surface of the third penetrating hole, the locking assembly comprises a limiting hole (28) which is arranged in the penetrating portion (27) and matched with the second connecting shaft (25), a limiting portion (29) which is arranged on the penetrating portion (27) and matched with the third penetrating hole, and an elastic member (30) which is sleeved on the second connecting shaft (25), the front end of the elastic member (30) abuts against the rear cover plate (23), the rear end of the elastic member abuts against the penetrating portion (27), and the limiting portion (29) is matched with the third penetrating hole under the action of the elastic member (30).

7. A length-adjustable skipping rope according to claim 6 wherein the anti-slip structure comprises an annular step (31) on the through-going portion (27), the annular step (31) abuts against the rear cover (26) under the action of the elastic member (30).

8. A length adjustable skipping rope as claimed in claim 1 wherein the side wall of the cylindrical cavity (3) has an axially extending limiting groove (32) and the rope guide body (6) has a limiting protrusion (33) extending into the limiting groove (32).