Roller skate

Abstract

The embodiment of the invention discloses a roller skate. The roller skate comprises a front wheel carrier and a rear wheel carrier, a front wheel is arranged at one end of the front wheel frame, a driving shaft is fixedly connected to the other end of the front wheel frame, and the front wheel frame is rotationally connected with the rear wheel frame through the driving shaft; a transmission amplification structure is arranged in the rear wheel frame, the input end of the transmission amplification structure is connected with the driving shaft through a one-way structure, and the output end of the transmission amplification structure is connected with a rear wheel; the driving shaft is fixedly connected with a return lock, the rear wheel frame is provided with a limiting portion, the driving shaft is sleeved with a torsional spring, one end of the torsional spring is connected with the front wheel frame, and the other end of the torsional spring is connected with the rear wheel frame. The front wheel frame is provided with an energy charging position and an unfolding position, and during use, the front wheel frame can rotate from the energy charging position to the unfolding position to drive the driving shaft to rotate and drive the rear wheel to rotate; and the torsion spring can enable the front wheel frame to rotate from the unfolding position to the energy charging position.

Description

Technical Field

[0001] The present invention relates to the technical field of sports equipment, in particular to a roller skate. Background Art

[0002] The existing roller skates on the market usually reduce the friction between the shoes and the ground by means of wheels on the shoes. When in use, the user changes his or her center of gravity and pushes the ground backwards, driving the roller skates forward through the reaction force. The distance the roller skates move mainly depends on the force of the user pushing backwards. It is more difficult to skate and the transmission efficiency is relatively low. Summary of the invention

[0003] In view of this, the present invention provides a roller skate, which is used to solve the problem that the roller skate in the prior art is difficult to move and has low transmission efficiency.

[0004] To achieve one or part or all of the above purposes or other purposes, the present application provides a roller skate, including a front wheel frame and a rear wheel frame;

[0005] The front wheel frame is provided with a front wheel at one end and a drive shaft is fixedly connected to the other end, and the front wheel frame is rotatably connected to the rear wheel frame through the drive shaft;

[0006] A transmission amplification structure is provided in the rear wheel frame, the input end of the transmission amplification structure is connected to the drive shaft through a one-way structure, and the output end of the transmission amplification structure is connected to the rear wheel;

[0007] A return lock is fixedly connected to the drive shaft, a limiting portion is provided on the rear wheel frame, a torsion spring is sleeved on the drive shaft, one end of the torsion spring is connected to the front wheel frame, and the other end is connected to the rear wheel frame;

[0008] The front wheel frame has a charging position and an unfolding position. When in use, the front wheel frame can rotate from the charging position to the unfolding position, drive the drive shaft to rotate, and drive the rear wheel to rotate through the transmission amplification structure;

[0009] The torsion spring can enable the front wheel frame to rotate from the deployed position to the charging position, and enable the return lock to rotate to abut against the limiting portion.

[0010] Furthermore, the roller skates also include a shoe frame, and the shoe frame is fixedly connected to the rear wheel frame.

[0011] Furthermore, the transmission amplification structure includes a driving wheel, a driven wheel and an amplification gear set, the amplification gear set includes a transmission shaft, a coaxially arranged small gear and a large gear, the small gear and the large gear are sleeved on the transmission shaft, the driving wheel is meshed with the small gear, and the driven wheel is meshed with the large gear.

[0012] Furthermore, the amplifying gear set is provided with a plurality of sets, and the small gears in each set of the amplifying gear set are meshed with the large gears in the adjacent set of the amplifying gear set.

[0013] Furthermore, the one-way structure is a ratchet, the driving wheel is rotatably connected to the driving shaft, the ratchet is fixedly connected to the driving shaft, a ratchet is provided on one side of the driving wheel, and the ratchet is adapted to the ratchet.

[0014] Furthermore, the return lock includes a connecting ring and a limiting buckle, the connecting ring is sleeved on the driving shaft, and the limiting buckle is fixedly arranged on the outer side wall of the connecting ring.

[0015] Further, the limiting portion is a limiting protrusion, the limiting protrusion is fixedly arranged on the outer side wall of the rear wheel frame, the limiting protrusion is located on one side of the connecting ring, and the limiting protrusion can abut against the limiting buckle.

[0016] Further, the limiting protrusion includes a first inclined surface and a first plane, and the limiting buckle includes a second inclined surface and a second plane;

[0017] When the limiting buckle rotates along the first direction, the second plane can abut against the first plane, and when the limiting buckle rotates along the second direction, the second inclined surface can rotate along the first inclined surface.

[0018] Furthermore, the return lock is located between the front wheel frame and the rear wheel frame, and a spring is sleeved on the drive shaft, one end of the spring abuts against the front wheel frame, and the other end abuts against the connecting ring.

[0019] Furthermore, there are two front wheels, and there are two rear wheels, and the distance between the two front wheels is greater than the distance between the outer side of one rear wheel and the outer side of another rear wheel;

[0020] The front wheel frame also has a folding position, and when the front wheel frame is in the folding position, the two rear wheels are located between the two front wheels;

[0021] After the spring is compressed, the return lock moves away from the limiting portion, and the front wheel frame can drive the return lock to rotate to the folding position.

[0022] Furthermore, a brake block is fixedly provided at one end of the rear wheel frame close to the rear wheel, and the brake block is arranged obliquely to the horizontal plane.

[0023] Implementing the embodiments of the present invention will have the following beneficial effects:

[0024] After the above roller skates are used, when no external force is applied, the front wheel frame is in the charging position. After the user puts on the roller skates, he steps on the front wheel frame to move it from the charging position to the unfolding position. The front wheel frame drives the drive shaft to rotate, and the return lock on the drive shaft rotates together. The front wheel frame rotates a certain angle until the return lock abuts against the limit part on the rear wheel frame. The transmission is amplified by the transmission amplification structure connected to the drive shaft, driving the rear wheel to rotate and driving the roller skates and the user to move forward. When the user lifts his foot, the front wheel frame is acted upon by the torsion spring to rotate back to the charging position from the unfolding position. Since the drive shaft is connected with a one-way structure, the rear wheel will not rotate during this process. The user can drive the roller skates to move forward by repeatedly lifting his foot and stepping down. The movement is labor-saving, the transmission efficiency is high, and a long distance can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] in:

[0027] Figure 1 A schematic diagram of the structure of an embodiment of the roller skates proposed in this application without showing a shoe frame;

[0028] Figure 2 for Figure 1 A magnified view of middle;

[0029] Figure 3 for Figure 1 Enlarged view of middle B;

[0030] Figure 4 This is a schematic diagram of the front wheel frame and other partial structures of an embodiment of the roller skates proposed in this application;

[0031] Figure 5 A schematic diagram of the front wheel frame and the transmission amplification structure and other partial structures of an embodiment of the roller skates proposed in this application;

[0032] Figure 6 This is a schematic diagram of the exploded structure of an embodiment of the roller skates proposed in this application;

[0033] Figure 7 for Figure 6 Enlarged view of middle C;

[0034] Figure 8 A schematic structural diagram of an embodiment of the roller skates proposed in this application;

[0035] Fig. 9 for Figure 8 Cross-sectional view of the middle DD section;

[0036] Fig.10 A schematic structural diagram of a roller skate in an embodiment of the present application, in which the front wheel frame is in an unfolded position;

[0037] Fig.11 A schematic structural diagram of a front wheel frame in a charging position in one embodiment of the roller skates proposed in the present application;

[0038] Fig.12 A schematic structural diagram of an embodiment of the roller skates proposed in the present application, in which the front wheel frame is in a folded position;

[0039] Fig.13 This is a schematic structural diagram of another angle when the front wheel frame of one embodiment of the roller skates proposed in the present application is in a folded position;

[0040] Fig.14 This is a schematic diagram of the structure of a return lock in one embodiment of the roller skates proposed in this application;

[0041] Fig.15 This is a schematic diagram of the structure of the rear wheel frame portion in one embodiment of the roller skates proposed in this application.

[0042] Reference numerals:

[0043] 1. Front wheel frame; 11. Front wheel; 12. Drive shaft; 13. Torsion spring; 14. Ratchet; 15. Spring;

[0044] 2. rear wheel frame; 21. rear wheel; 22. cylindrical gear; 23. left housing; 231. left mounting slot; 24. right housing;

[0045] 3. return lock; 31. connecting ring; 32. limit buckle; 33. second inclined surface; 34. second plane;

[0046] 4. a limiting protrusion; 41. a first inclined surface; 42. a first plane;

[0047] 5. Shoe rack; 51. Fixing plate;

[0048] 61, driving wheel; 611, ratchet; 62, driven wheel; 63, amplifying gear set; 631, transmission shaft; 632, small gear; 633, large gear;

[0049] 7. Brake pads. DETAILED DESCRIPTION

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0051] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0053] Reference Figures 1 to 15 , the present application proposes a roller skate, comprising a front wheel frame 1 and a rear wheel frame 2;

[0054] A front wheel 11 is provided at one end of the front wheel frame 1, and a drive shaft 12 is fixedly connected to the other end. The front wheel frame 1 is rotatably connected to the rear wheel frame 2 through the drive shaft 12; a transmission amplification structure is provided in the rear wheel frame 2, and the input end of the transmission amplification structure is connected to the drive shaft 12 through a one-way structure, and the output end of the transmission amplification structure is connected to the rear wheel 21; when the drive shaft 12 rotates, the transmission amplification structure can amplify the rotation angle and transmit it to the rear wheel 21, so that when the drive shaft 12 rotates a certain angle, the rear wheel 21 can rotate several circles.

[0055] A return lock 3 is fixedly connected to the drive shaft 12, a limit portion is provided on the rear wheel frame 2, a torsion spring 13 is sleeved on the drive shaft 12, one end of the torsion spring 13 is connected to the front wheel frame 1, and the other end is connected to the rear wheel frame 2;

[0056] Reference Figure 10 to Figure 11The front wheel frame 1 has a charging position and an unfolding position. When in use, the front wheel frame 1 can rotate from the charging position to the unfolding position, drive the drive shaft 12 to rotate, and drive the rear wheel 21 to rotate through the transmission amplification structure; the torsion spring 13 can make the front wheel frame 1 rotate from the unfolding position to the charging position, and make the return lock 3 rotate to abut against the limit part. A bearing is provided between the front wheel frame 1 and the drive shaft 12, and the bearing is fixed in the radial direction by a structure such as a retaining spring, which can reduce friction and make the rotation resistance of the front wheel frame 1 smaller.

[0057] Specifically, when the front wheel frame 1 is at the charging position, the return lock 3 abuts against the limiting portion, such as Fig.11 As shown, at this time, the angle between the front wheel frame 1 and the rear wheel frame 2 is less than 180°, and can be set to 130°, 140°, 145°, 155°, etc. Specifically, when the front wheel frame 1 is in the charging position, the return lock 3 abuts against the limit portion, such as Fig.11 As shown, at this time, the angle between the front wheel frame 1 and the rear wheel frame 2 is less than 180°, such as 130°, 140°, 145°, 155°, etc. For example, when the user puts on the roller skates and stands on the ground normally, the front wheel frames 1 corresponding to the roller skates on both feet are in the unfolded position. At this time, the state of the shoes is as follows: Fig.10 As shown in FIG. 1 , when the user lifts one foot, the front wheel frame 1 of the roller skate on the foot moves to the charging position due to the action of the torsion spring 13, as shown in FIG. Fig.11 As shown, the foot is then put down so that the front and rear wheels touch the ground at the same time, and a downward force is applied to press the front wheel frame 1 of the roller skate from the charging position to the unfolding position. During the process of the front wheel frame 1 moving from the charging position to the unfolding position, the drive shaft 12 rotates with the front wheel frame 1, and the rear wheel 21 is driven to rotate through the transmission amplification structure, so that the skate can move. After that, the left and right feet can slide alternately. In the above process, the rotation angle of the front wheel frame 1 is equal to the angle between the return lock 3 and the limit part when it is in the unfolding position.

[0058] When the front wheel frame 1 rotates from the charging position to the unfolding position, the rotation angle is between 10° and 50°.

[0059] For example, when the front wheel frame 1 rotates 30°, since the front wheel frame 1 is fixedly connected to the drive shaft 12, the drive shaft 12 also rotates 30°, and the drive shaft 12 is connected to a transmission amplification structure, which can drive the transmission amplification structure to rotate, and the transmission amplification structure can have a higher transmission ratio and transmit it to the rear wheel. For example, the transmission ratio is 1:120, and the rear wheel 21 connected to the transmission amplification structure can rotate ten times. For example, the circumference of the rear wheel 21 is 15 cm, and the roller skates can move forward 15 meters. In other words, in the above embodiment, when the front wheel frame 1 rotates from the charging position to the unfolding position once, the roller skates can move 15 meters. It can be understood that the above embodiment is only an example, and its specific value can be adjusted according to the user's demand for the speed of the roller skates. The user can adjust the speed of movement by adjusting the speed of stepping on the front wheel frame 1. After the user lifts his foot so that the roller skates are suspended in the air, the front wheel frame 1 rotates in the opposite direction due to the force of the torsion spring 13 and returns to the charging position. The user can move forward quickly by alternately lifting his feet. By adjusting the center of gravity of the body, the forward direction can be adjusted to achieve a turn.

[0060] In addition, refer to Figure 6 The roller skates also include a shoe rack 5, which is fixedly connected to the rear wheel frame 2. An L-shaped fixing plate 51 is also provided at one end of the shoe rack 5 close to the rear wheel 21, so that after the user puts on the roller skates, the roller skates are prevented from being detached from the feet by inertia when the user moves forward. The shoe rack 5 may include a flexible strap, which the user ties to his or her shoes or feet, or a shoe-shaped wearable device made of hard materials. According to conventional size charts, a variety of styles can be made, and the user can directly wear roller skates of suitable size. The shoe rack 5 can also be detachably connected to the rear wheel frame 2 through a buckle or other structure, with the user's comfort as the measurement standard.

[0061] In this embodiment, refer to Figure 5The transmission amplification structure includes a driving wheel 61, a driven wheel 62 and an amplification gear set 63. The amplification gear set 63 includes a transmission shaft 631, a coaxially arranged small gear 632 and a large gear 633. The small gear 632 and the large gear 633 are sleeved on the transmission shaft 631. The driving wheel 61 is meshed with the small gear 632, and the driven wheel 62 is meshed with the large gear 633. The driving wheel 61 is connected to the driving shaft 12 through a bearing. The driving wheel 61 has a large number of teeth and meshes with a small gear 632 with a small number of gears. For example, the tooth ratio of the driving wheel 61 to the small gear 632 is 3:1, and the tooth ratio of the large gear 633 to the driven wheel 62 is 1.5:1. Since the volume of the rear wheel 21 is small, in order to save space, the rear wheel 21 is also connected to a cylindrical gear 22, and the cylindrical gear 22 can rotate synchronously with the rear wheel. The cylindrical gear 22 meshes with the driven wheel 62, and the tooth ratio is 2:1. For example, when only one set of amplifying gear sets 63 is set, the transmission ratio can reach 1:9, that is, when the driving wheel 61 rotates 1 circle, the small gear 632 rotates 3 circles, the driven wheel 62 rotates 4.5 circles, the cylindrical gear rotates 9 circles, and the rear wheel also rotates 9 circles. In different embodiments, the amplifying gear set 63 may be provided with several groups, and the gear ratio of each group of the amplifying gear set 63 may also be different, and the small gear 632 in each group of the amplifying gear set 63 is meshed with the large gear 633 in the adjacent group of the amplifying gear set 63. Still taking the above embodiment as an example, by providing three groups of the amplifying gear sets 63, a transmission ratio of 81:1 can be achieved, and by providing four groups of the amplifying gear sets 63, a transmission ratio of 243:1 can be achieved. The higher the transmission ratio, the greater the speed of the roller skates. In other embodiments, the transmission amplification structure may not be provided with a driven wheel 62, and the amplifying gear set 63 is directly meshed with the cylindrical gear 22 directly connected to the rear wheel 21.

[0062] Since the size of the roller skates is limited, for roller skates with multiple sets of amplifying gear sets 63, in order to minimize the volume of the transmission amplifying structure, the diameters of each large gear are not completely equal. Figure 5Taking the setting of three groups of amplifying gear sets as an example, the pinion of the first group of amplifying gear sets is meshed with the driving wheel 61, and the large gear is located on the left side of the pinion, which is meshed with the pinion in the second group of amplifying gear sets. The large gear in the second group of amplifying gear sets is located on the right side of the pinion in the second group of amplifying gear sets. In order to avoid the pinion of the first group of amplifying gear sets from contacting the large gear in the second group of amplifying gear sets, the diameter of the large gear in the second group of amplifying gear sets can be smaller than the large gear of the first group of amplifying gear sets, and the number of teeth of these two large gears can also be different. Similarly, the small gear in the third group of amplifying gears is meshed with the diameter of the large gear in the second group of amplifying gears. The large gear in the third group of amplifying gears is located on the right side of the small gear in the third group of amplifying gears. The small gear in the third group of amplifying gears is meshed with the driven wheel 62. The diameter of the large gear in the third group of amplifying gears can be equal to the large gear in the first group of amplifying gears, so as to make full use of the space and achieve a higher transmission ratio as much as possible. Therefore, the width of the entire transmission amplification system is narrow and the overall length is short. When the user wears roller skates, the center of gravity mainly falls on the rear wheel frame 2. The length of the rear wheel frame 2 is long, which will affect the user's force on the front wheel frame 1. Reducing the length of the rear wheel frame 2 can make the roller skates more ergonomic.

[0063] In this embodiment, the rear wheel frame 2 includes a left housing 23 and a right housing 24 that are assembled together, and the transmission amplification system is located in a cavity formed by the left housing 23 and the right housing 24. A plurality of left mounting grooves 231 are provided on the inner wall of the left housing 23, and a plurality of right mounting grooves are provided on the inner wall of the right housing 24. One end of the transmission shaft 631 of each amplification gear set 63 is located in a left mounting groove 231, and the other end is located in a right mounting groove. A bearing is provided in each left mounting groove 231 and each right mounting groove. When the left housing 23 and the right housing 24 are assembled together, the transmission shaft 631 is fixed in the axial direction. The bearing can reduce the friction between the transmission shaft 631 and the left housing 23 or the right housing 24, reduce the friction loss, and realize the relative rotation of the transmission shaft 631 and the rear wheel frame 2.

[0064] When the user releases the front wheel frame 1, so that the front wheel frame 1 is reset from the unfolded position to the charging position, the front wheel frame 1 will drive the drive shaft 12 to rotate. In order to prevent the rear wheel 21 from rotating in the opposite direction during this process, a one-way structure is also provided on the drive shaft 12. In this embodiment, the one-way structure is a ratchet 14, the driving wheel 61 is rotatably connected to the drive shaft 12, the ratchet 14 is fixedly connected to the drive shaft 12, and a ratchet 611 is provided on one side of the driving wheel 61, and the ratchet 611 is adapted to the ratchet 14. A toothed structure is provided on the inner ring of the ratchet 14, and a limiting tooth adapted thereto is also provided at a corresponding position of the drive shaft 12, so that the ratchet 14 cannot move relative to the drive shaft 12 in the radial direction. When the drive shaft 12 rotates in the opposite direction, the ratchet 14 rotates together with the drive shaft 12, and the ratchet 14 cannot drive the ratchet 611 on the driving wheel 61 to rotate, and the rear wheel 21 will not rotate during this process.

[0065] In this embodiment, refer to Fig.14 The return lock 3 includes a connecting ring 31 and a limiting buckle 32. The connecting ring 31 is sleeved on the driving shaft 12, and the limiting buckle 32 is fixedly arranged on the outer side wall of the connecting ring 31. The limiting part is a limiting protrusion 4, which is fixedly arranged on the outer side wall of the rear wheel frame 2. The limiting protrusion 4 is located on one side of the connecting ring 31, and the limiting protrusion 4 can abut against the limiting buckle 32.

[0066] In one embodiment, two front wheels 11 are provided, and two rear wheels 21 are also provided, and the distance between the two front wheels 11 is greater than the distance from the outer side of one rear wheel to the outer side of another rear wheel; Fig.12 and Fig.13 The front wheel frame 1 also has a folding position. When the front wheel frame 1 is in the folding position, the two rear wheels 21 are located between the two front wheels 11; preferably, the front wheels 11 and the rear wheels 21 are equal in size. When the front wheel frame 1 is in the folding position, the axes of the two front wheels 11 and the two rear wheels 21 are located on the same horizontal line, which can minimize the size of the roller skates after folding.

[0067] In this embodiment, the two rear wheels 21 are connected by a bearing screw, and the side wall of the bearing screw is provided with round teeth adapted to the cylindrical gear 22, so that after the driven wheel 62 can drive the cylindrical gear to rotate, the rear wheel 21 rotates synchronously. The return lock 3 is located between the front wheel frame 1 and the rear wheel frame 2, and a spring 15 is sleeved on the drive shaft 12, one end of the spring 15 abuts against the front wheel frame 1, and the other end abuts against the connecting ring 31. The torsion spring 13 is located at one end of the drive shaft 12, and the spring 15 is located at the other end of the drive shaft 12. The rear wheel frame 2 is located between the spring 15 and the torsion spring 13, and the spring 15 and the torsion spring 13 can play a role in partially limiting the radial position of the rear wheel frame 2.

[0068] Specifically, when the front wheel frame 1 is in the charging position or the unfolded position, the user wants to fold the roller skates and pull the limit buckle 32 of the return lock 3 away from the rear wheel frame, so that the spring 15 is compressed, the limit protrusion 4 is not on the rotation path of the limit buckle 32, and the return lock 3 is away from the limit protrusion 4. The user can rotate the front wheel frame 1, and the return lock 3 rotates together until the front wheel frame 1 moves to the folded position. Fig.12 The torsion spring 13 drives the front wheel frame 1 to rotate. When the front wheel frame 1 moves past the charging position, the limiting protrusion 4 cannot limit the limiting buckle 32. The torsion spring 13 allows the front wheel frame 1 to continue to rotate until the front wheel frame 1 abuts against the rear wheel frame 2, and the two rear wheels are located between the two front wheels, thus completing the folding of the roller skates.

[0069] When the user needs to wear the roller skates, an external force is applied to the front wheel frame 1 and the roller skates are opened, so that the limit buckle 32 rotates and passes over the limit protrusion 4 until the limit buckle 32 abuts against the limit protrusion 4 under the action of the torsion spring 13. The front wheel frame 1 is in the charging position and can be used.

[0070] Specifically, refer to Fig.14 and Fig.15 The limiting protrusion 4 includes a first inclined surface 41 and a first plane 42, and the limiting buckle 32 includes a second inclined surface 33 and a second plane 34; when the front wheel frame 1 is in the unfolded position, the first plane 42 and the second plane 34 are arranged opposite to each other, and when the front wheel frame 1 is in the folded position, the first inclined surface 41 and the second inclined surface 33 are arranged opposite to each other.

[0071] When the limit buckle 32 rotates along the first direction, the first direction is the rotation direction of the limit buckle 32 when the front wheel frame 1 rotates from the unfolded position to the charging position. When the front wheel frame 1 rotates to the charging position, the second plane 34 can abut against the first plane 42, and the limit projection 4 limits the limit buckle 32. When the limit buckle 32 rotates along the second direction, the second direction is also the rotation direction of the limit buckle 32 when the front wheel frame 1 rotates from the folded position to the unfolded position when the roller skates are opened. In this process, the second inclined surface 33 can rotate along the first inclined surface 41. Specifically, when the user wants to open the folded roller skates, an external force is applied to the front wheel frame 1. Since the second inclined surface 33 can rotate along the first inclined surface 41 when the limit buckle 32 rotates, the user only needs to overcome the force of the torsion spring 13 to open the front wheel frame 1. When the limit buckle 32 passes over the limit protrusion 4, the user releases his hand, and under the action of the torsion spring 13, the front wheel frame 1 will automatically rotate to the charging position, and the limit buckle 32 will be limited by the limit protrusion 4.

[0072] In this embodiment, a brake block 7 is fixedly provided at one end of the rear wheel frame 2 close to the rear wheel 21, and the brake block 7 is arranged obliquely to the horizontal plane. The brake block 7 can be made of rubber, nylon fiber, iron block and other materials, preferably rubber, which has good friction with the ground and is not easy to wear. When the user needs to brake, he only needs to lift the toes and transfer the center of gravity of the body to the heel, so that the brake block 7 contacts the ground to achieve deceleration and braking. The angle of the lowest point of the brake block 7 relative to the horizontal plane can be greater than the angle of rotation of the front wheel frame 1 when it moves from the charging position to the unfolded position, so as to avoid the brake block 7 from contacting the ground when moving forward and affecting the travel speed.

[0073] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A roller skate, characterized in that: Including front wheel frame and rear wheel frame; The front wheel frame is provided with a front wheel at one end and a drive shaft is fixedly connected to the other end, and the front wheel frame is rotatably connected to the rear wheel frame through the drive shaft; A transmission amplification structure is provided in the rear wheel frame, the input end of the transmission amplification structure is connected to the drive shaft through a one-way structure, and the output end of the transmission amplification structure is connected to the rear wheel; A return lock is fixedly connected to the drive shaft, a limiting portion is provided on the rear wheel frame, a torsion spring is sleeved on the drive shaft, one end of the torsion spring is connected to the front wheel frame, and the other end is connected to the rear wheel frame; The front wheel frame has a charging position and an unfolding position. When in use, the front wheel frame can rotate from the charging position to the unfolding position, drive the drive shaft to rotate, and drive the rear wheel to rotate through the transmission amplification structure; The torsion spring can enable the front wheel frame to rotate from the deployed position to the charging position, and enable the return lock to rotate to abut against the limiting portion.

2. The roller skates according to claim 1, characterized in that: The roller skates also include a shoe frame, which is fixedly connected to the rear wheel frame.

3. The roller skates according to claim 1, characterized in that: The transmission amplification structure includes a driving wheel, a driven wheel and an amplification gear set, the amplification gear set includes a transmission shaft, a coaxially arranged small gear and a large gear, the small gear and the large gear are sleeved on the transmission shaft, the driving wheel is meshed with the small gear, and the driven wheel is meshed with the large gear.

4. The roller skates according to claim 3, characterized in that: The amplifying gear set is provided with a plurality of groups, and the small gears in each group of the amplifying gear set are meshed with the large gears in the adjacent group of the amplifying gear set.

5. The roller skates according to claim 3, characterized in that: The one-way structure is a ratchet, the driving wheel is rotatably connected to the driving shaft, the ratchet is fixedly connected to the driving shaft, a ratchet is provided on one side of the driving wheel, and the ratchet is adapted to the ratchet.

6. The roller skates according to claim 1, characterized in that: The return lock comprises a connecting ring and a limiting buckle, wherein the connecting ring is sleeved on the driving shaft, and the limiting buckle is fixedly arranged on the outer side wall of the connecting ring.

7. The roller skates according to claim 6, characterized in that: The limiting portion is a limiting protrusion, the limiting protrusion is fixedly arranged on the outer side wall of the rear wheel frame, the limiting protrusion is located on one side of the connecting ring, and the limiting protrusion can abut against the limiting buckle.

8. The roller skates according to claim 7, characterized in that: The limiting protrusion includes a first inclined surface and a first plane, and the limiting buckle includes a second inclined surface and a second plane; When the limiting buckle rotates along the first direction, the second plane can abut against the first plane, and when the limiting buckle rotates along the second direction, the second inclined surface can rotate along the first inclined surface.

9. The roller skates according to claim 6, characterized in that: The return lock is located between the front wheel frame and the rear wheel frame. A spring is sleeved on the drive shaft. One end of the spring abuts against the front wheel frame, and the other end abuts against the connecting ring.

10. The roller skates according to claim 6, characterized in that: There are two front wheels and two rear wheels, and the distance between the two front wheels is greater than the distance from the outer side of one rear wheel to the outer side of another rear wheel; The front wheel frame also has a folding position, and when the front wheel frame is in the folding position, the two rear wheels are located between the two front wheels; After the spring is compressed, the return lock moves away from the limiting portion, and the front wheel frame can drive the return lock to rotate to the folding position.

11. The roller skates according to claim 1, characterized in that: A brake block is fixedly provided at one end of the rear wheel frame close to the rear wheel, and the brake block is arranged obliquely to the horizontal plane.

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