A kind of height-reducing and speed-increasing roller skates

Abstract

A height-reducing and speed-increasing roller skate. Currently, the internal structure of shoes that can be transformed between ordinary shoes and roller skates is complex, the wheel ejection method is single, and because the wheels are located inside the shoe and the height is fixed, the shoe height is significantly higher than that of ordinary shoes, which is uncomfortable to wear, and the sliding performance of foldable roller skates is also poor. In the present invention, the bottom of the shoe body is processed with a mounting groove, and the deformable wheel assembly includes two support rods and four pulleys. The two support rods are arranged in the mounting groove along the length direction of the shoe body, and the upper end of each support rod is hinged in the mounting groove. Two pulleys are arranged in parallel at the lower end of each support rod. An angle α is formed between the axis connecting the two pulleys on the same support rod and the central axis of the length direction of the support rod. When the pulley is in the mounting groove, the axial direction of the pulley is in the same direction as the height direction of the shoe body. When the pulley is in a sliding state, the axial direction of the pulley is in the same direction as the width direction of the shoe body.

Description

Technical field:

[0001] The invention relates to a height-reducing and speed-increasing roller skate, belonging to the technical field of sports goods. Background technology:

[0002] With the widespread popularity of roller skating, there are more and more places where roller skating can be performed. Many people can be seen skating on roller skates in parks and squares. With the widespread use of roller skates, problems in their use are also prominent, mainly manifested in the inconvenience of replacing roller skates. Users need to bring two sets of shoes for replacement. There is an urgent need for the emergence of multi-purpose roller skates. However, the internal structure of the shoes that can be converted between ordinary shoes and roller skates is complex and prone to failure. In addition, the wheel output method is single, and the height of the wheel is in the same direction as the shoe height, so that when the wheel is inside the shoe, the direction is fixed and the height cannot be ignored. In order to take into account the height of the wheel, the total height of the shoe is significantly higher than that of the ordinary shoe. During normal walking, a "walking on stilts" walking method is formed, which is uncomfortable to wear and is even more unfavorable for stable walking. In addition, the wheel height is limited, the sliding speed is not high, the distance between the front and rear wheels is not large, and the sliding stability is poor. At the same time, the sliding performance of the shoes that can be converted between ordinary shoes and roller skates is poor. Summary of the invention:

[0003] In order to solve the problems mentioned in the above background technology, the object of the present invention is to provide a height-reducing and speed-increasing roller skate.

[0004] A height-reducing and speed-increasing roller skate comprises a shoe body and a deformable wheel assembly. A mounting groove is processed on the bottom of the shoe body. The deformable wheel assembly comprises two support rods and four pulleys. The two support rods are arranged in the mounting groove along the length direction of the shoe body. The upper end of each support rod is hinged in the mounting groove. Two pulleys are arranged in parallel at the lower end of each support rod. An angle α is formed between the axis connecting the two pulleys on the same support rod and the central axis in the length direction of the support rod. When the pulley is in the mounting groove, the axial direction of the pulley is in the same direction as the height direction of the shoe body. When the pulley is in a sliding state, the axial direction of the pulley is in the same direction as the width direction of the shoe body.

[0005] As a preferred solution: the value range of the angle α is 60° to 75°.

[0006] As a preferred solution: when the four pulleys are in a sliding state, the angle between the central axis of the support rod in the length direction and the height direction of the shoe body is β, and the sum of the angle β and the angle α is equal to 90°.

[0007] As a preferred solution: the support rod among the two support rods close to the toe of the shoe body is the front support rod, and the support rod among the two support rods close to the tail of the shoe body is the rear support rod. When the four pulleys are all in a sliding state, the pulley at the lower end of the front support rod close to the toe of the shoe body is the first pulley, and the pulley at the lower end of the rear support rod close to the tail of the shoe body is the tail pulley. The distance between the axis of the first wheel and the axis of the tail wheel is L.

[0008] As a preferred solution: the support rod includes an outer cover body, a rotating shaft, an inner plug, an insert block, a limit plate, a connecting piece and a spring. The inner plug is arranged in the outer cover body, the rotating shaft is passed through the inner plug, both ends of the rotating shaft pass through the side walls of the outer cover body and are hinged to the side walls of the mounting groove respectively, a socket is processed at the lower end of the inner plug, a limit plate is fixedly mounted on the insert block, the upper end of the insert block is detachably connected to the socket, the lower end of the insert block passes through the outer cover body and is integrally connected to the upper end of the connecting piece, the spring is mounted on the insert block and is between the limit plate and the bottom surface of the outer cover body, and two pulleys are hinged at the lower end of the connecting piece.

[0009] As a preferred solution: the plug block is a special-shaped block, and the plug block includes a square column and a round column, and the square column and the round column are fixedly connected in sequence from top to bottom to form a whole.

[0010] As a preferred solution: the ratio of the length of the square cylinder to the length of the circular cylinder is 1:3.

[0011] As a preferred solution: the bottom end of the connecting piece is processed with a connecting part that matches the pulley one by one, the longitudinal cross-section shape of the connecting piece along its length direction is an oblique triangle, and the two end corners of the bottom of the connecting piece are two connecting parts.

[0012] As a preferred solution: the upper end of each support rod is hinged to the inner wall of the end of the installation groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention is a shoe body that can be flexibly converted between walking shoes and roller skates. The support rod and the pulley in the deformable wheel assembly cooperate with each other to realize the pulley to expand and retract under the drive of the support rod, directly reducing the height of the walking shoe to the height of an ordinary shoe. The operation steps of changing shoes are omitted, and the converted roller skates can have the same gliding performance as existing single-function roller skates after the walking shoe is converted into roller skates.

[0015] Second, the support rod cooperates with the pulley to realize two rotation actions in sequence. One rotation action is a rotation process with the sum of the angle of 90 degrees and angle β as the total rotation angle, that is, the support rod is rotated from a state parallel to the bottom of the shoe body to a state perpendicular to the bottom of the shoe body. The other rotation action is a 90-degree rotation action under the cooperation between the outer cover, the rotating shaft, the inner plug, the plug block, the limit plate, the connecting piece and the spring, thereby driving the pulley to realize a 90-degree rotation process after unfolding or before folding, thereby directly reducing the problem of the total height being difficult to overcome when taking into account the shoe when the pulley's own height is fixed and cannot be changed, making the structure of the mutual cooperation between the roller skates and ordinary shoes more reasonable and simple, and the deformation operation is stable and reliable.

[0016] 3. The present invention realizes continuous changes of multiple actions of the pulley through a simple structure formed by a support rod, and the operation is fast and the position is stable after deformation. Description of the drawings:

[0017] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0018] Figure 1 It is a bottom view structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the main structure of the present invention when used as a walking shoe;

[0020] Figure 3 This is a schematic diagram of the main structure of the present invention when used as a roller skate;

[0021] Figure 4 It is a schematic diagram of the main structure of the connection relationship between the support rod and the pulley;

[0022] Figure 5 A schematic diagram of the main structural section showing the connection relationship between the support rod and the pulley;

[0023] Figure 6 A side structural cross-sectional schematic diagram of the connection relationship between the support rod and the pulley;

[0024] Figure 7 It is a side structural schematic diagram of the present invention.

[0025] In the figure, 1-shoe body; 2-deformation wheel assembly; 3-installation slot; 6-support rod; 6-1-outer cover; 6-2-rotating shaft; 6-3-inner plug; 6-4-plug block; 6-4-1-square cylinder; 6-4-2-round cylinder; 6-5-limiting plate; 6-6-connector; 6-7-spring; 6-8-jack; 6-9-reinforcement rib; 7-pulley; 8-connecting part; 9-elastic leg guard cloth cover. Specific implementation method:

[0026] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0027] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0028] Specific implementation method 1: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, this specific embodiment adopts the following technical scheme, which includes a shoe body 1 and a deformable wheel assembly 2. The bottom of the shoe body 1 is processed with a mounting groove 3. The deformable wheel assembly 2 includes two support rods 6 and four pulleys 7. The two support rods 6 are arranged in the mounting groove 3 along the length direction of the shoe body 1. The upper end of each support rod 6 is hinged in the mounting groove 3. Two pulleys 7 are arranged in parallel at the lower end of each support rod 6. An angle α is formed between the axial line between the two pulleys 7 on the same support rod 6 and the central axis of the length direction of the support rod 6. When the pulley 7 is in the mounting groove 3, the axial direction of the pulley 7 is in the same direction as the height direction of the shoe body 1. When the pulley 7 is in a sliding state, the axial direction of the pulley 7 is in the same direction as the width direction of the shoe body 1.

[0029] In this embodiment, the shape of the mounting groove 3 is matched with the shapes of the two support rods 6 and the four pulleys 7. The mounting groove 3 includes a strip groove, a plurality of first arc grooves and a plurality of second arc grooves. The length direction of the strip groove is in the same direction as the length of the shoe body 1, and the central axis of the length direction of the strip groove coincides with the central axis of the length direction of the shoe body 1. The plurality of first arc grooves are arranged on one side of the strip groove along the length direction of the strip groove, and the plurality of second arc grooves are arranged on the other side of the strip groove along the length direction of the strip groove. The plurality of first arc grooves and the plurality of second arc grooves are both semicircular groove bodies, and the first arc grooves and the second arc grooves are arranged one by one. The angle between the line between the centers of the first arc grooves and the second arc grooves and the central axis of the length direction of the strip groove is equal to the angle α.

[0030] In this embodiment, an elastic leg guard 9 is provided at the inlet and outlet of the shoe body 1. The elastic leg guard 9 can not only protect the ankle joint, but also help to improve the followability of the shoe body 1 and the foot.

[0031] In this embodiment, the shape of the mounting groove 3 matches the shape of the deformable wheel assembly 2 .

[0032] Furthermore, the mounting groove 3 includes a plurality of single grooves 3-1, and the single grooves 3-1 are arranged one-to-one corresponding to the support rods 6. Each single groove 3-1 is detachably connected to its corresponding support rod 6, and the shape of each single groove 3-1 matches the shape of the structure composed of its corresponding support rod 6 and the pulley 7 on the support rod 6.

[0033] In the present embodiment, when the deformable wheel assembly 2 is in the folded state, that is, the two support rods 6 and the four pulleys 7 are all stored in the installation groove 3, the use performance of the shoe body 1 at this time is the use performance of an ordinary walking shoe.

[0034] Furthermore, when the deformable wheel assembly 2 is in the unfolded state, that is, the two support rods 6 and the four pulleys 7 are all unfolded and located below the mounting groove 3, the performance of the shoe body 1 at this time is the performance of roller skates.

[0035] Specific embodiment 2: This embodiment is a further limitation of specific embodiment 1, and the value range of angle α is 60° to 75°. This setting is to make full use of the bottom surface area of ​​the shoe body 1, increase the diameter of the pulley 7 as much as possible, and effectively prevent the pulley 7 from interfering with the bottom surface of the shoe body 1 when sliding.

[0036] Specific implementation method three: This implementation method is a further limitation of specific implementation method one or two. When the four pulleys 7 are in a sliding state, the angle between the central axis of the support rod 6 in the length direction and the height direction of the shoe body 1 is β. This setting is to ensure that the axis line of the two pulleys 7 on the same support rod 6 is parallel to the bottom surface of the shoe body 1.

[0037] Furthermore, the sum of the angle β and the angle α is equal to 90°.

[0038] Specific implementation mode four: This implementation mode is a further limitation of specific implementation modes one, two or three. One of the two support rods 6, which is close to the toe of the shoe body 1, is a front support rod, and the other of the two support rods 6, which is close to the heel of the shoe body 1, is a rear support rod. When the four pulleys 7 are all in a sliding state, the pulley 7 at the lower end of the front support rod, which is close to the toe of the shoe body 1, is the first pulley, and the pulley 7 at the lower end of the rear support rod, which is close to the heel of the shoe body 1, is the tail pulley, and the distance between the axis center of the first wheel and the axis center of the tail wheel is L.

[0039] Since the angle α formed between the axis line between the two pulleys 7 on the same support rod 6 and the central axis in the length direction of the support rod 6 is less than 90 degrees, the length of the axis line between the two pulleys 7 is increased, that is, the diameter of the pulley 7 is increased, which makes the gliding speed of the roller skates faster at the same rotation speed. At the same time, the distance L between the axis of the first wheel and the axis of the tail wheel is also increased, making the roller skates more stable when standing and gliding, ensuring durable stability.

[0040] Combination Figure 1 and Figure 4 The relationship between the diameter of the pulley 7, the distance L between the axis of the first wheel and the axis of the tail wheel, and the angle α is as follows:

[0041] The shoe width of the shoe body 1 is b, the length of the line connecting the centers of each support rod 6 and the two corresponding pulleys 7 is h, the gap between the two pulleys 7 on the same support rod 6 is x, the distance between the pulley 7 and one side of the shoe body 1 is c, and the distance between the two rotating shafts 6-2 in the two support rods 6 is d;

[0042] The diameter of the pulley 7 is Φ, and the calculation formula of Φ is:

[0043] Φ = [(b-2c) / sinα-x] / 2;

[0044] The calculation formula for the distance L between the first wheel axis and the tail wheel axis is:

[0045] L=d+Φ+x+hsinβ=d+[(b-2c) / sinα+x] / 2+hcosα.

[0046] Assume that the gap x between the two pulleys 7 and the distance c between the pulley 7 and one side of the shoe body 1 are ignored, that is, x=0, c=0. Then:

[0047] Φ=b / (2sinα), L=d+b / (2sinα)+hcosα;

[0048] Thus, the dimensional relationship between the diameter Φ of the pulley 7, the distance L between the axis of the first wheel and the axis of the tail wheel and the angle α is obtained. This dimensional relationship shows that Φ and L become larger as the angle α decreases, which can ensure that the roller skates have a faster gliding speed at the same speed, and the roller skates are more stable when standing and gliding, ensuring durable stability. Limited by the structural size, 60°≤α≤75° is the optimal angle range.

[0049] Specific implementation mode five: This implementation mode is a further limitation of specific implementation modes one, two, three or four. The support rod 6 includes an outer cover body 6-1, a rotating shaft 6-2, an inner plug 6-3, an insert block 6-4, a stopper 6-5, a connector 6-6 and a spring 6-7. The inner plug 6-3 is arranged in the outer cover body 6-1, and the rotating shaft 6-2 is passed through the inner plug 6-3. The two ends of the rotating shaft 6-2 respectively pass through the side wall of the outer cover body 6-1 and the side wall of the installation groove 3. The walls are hinged, a socket 6-8 is processed at the lower end of the inner plug 6-3, a limit plate 6-5 is fixedly mounted on the plug block 6-4, the upper end of the plug block 6-4 is detachably connected to the socket 6-8, the lower end of the plug block 6-4 passes through the outer cover body 6-1 and is integrally connected to the upper end of the connecting piece 6-6, a spring 6-7 is mounted on the plug block 6-4 and is between the limit plate 6-5 and the bottom surface of the outer cover body 6-1, and at least one pulley 7 is hinged at the lower end of the connecting piece 6-6.

[0050] In this embodiment, the interior of the outer cover 6-1 provides accommodation space for the rotating shaft 6-2, the inner plug 6-3, the plug block 6-4, the limit plate 6-5 and the spring 6-7, and can also ensure that the longitudinal space of the spring 6-7 is effectively limited when the plug block 6-4 rotates, and can also provide a spatial position for the lateral torsional action of the spring 6-7, so that the plug block 6-4 can make a rotation action greater than 90 degrees while driving the pulley 7 to make a synchronous action through the connecting member 6-6, so that the pulley 7 can be turned from a parallel state to a vertical state relative to the bottom surface of the shoe body 1, thereby completing the conversion of the pulley 7 from a stored state to an open state.

[0051] Furthermore, when the plug block 6 - 4 rotates more than 90 degrees, the rotation angle is the sum of 90 degrees and the angle β.

[0052] In this embodiment, the spring 6-7 is in a primary compression state before twisting, and during the 90-degree twisting process, the spring 6-7 is compressed for a second time on the basis of the primary compression state. After ensuring that the top of the plug 6-4 is completely out of the socket 6-8, the plug 6-4 is rotated horizontally at an angle of 90 degrees. After rotating 90 degrees, the plug 6-4 is released, and the spring 6-7 is converted from the secondary compression state to the primary compression state. The plug 6-4 is inserted into the socket 6-8 for the second time, completing the 90-degree rotation process of the plug 6-4. The rotation of the plug 6-4 drives the pulley 7 to make a synchronous rotation through the connecting member 6-6.

[0053] Specific implementation method six: This implementation method is a further limitation of specific implementation methods one, two, three, four or five. The plug block 6-4 is a special-shaped block. The plug block 6-4 includes a square column 6-4-1 and a circular column 6-4-2. The square column 6-4-1 and the circular column 6-4-2 are fixedly connected in sequence from top to bottom as a whole.

[0054] In this embodiment, the plug block 6-4 is a special-shaped block, specifically a structure composed of a square column 6-4-1 and a round column 6-4-2, which is an upper and lower round structure. The shape of the square column 6-4-1 is to match the shape of the socket 6-8 in the inner plug 6-3, so that the two can be plugged in quickly and smoothly.

[0055] Furthermore, the shape of the circular cylinder 6-4-2 is designed to cooperate with the spring 6-7, so that the transition of the spring 6-7 from the first compression to the second compression is smooth and unobstructed.

[0056] Furthermore, the transverse cross-section of the square column 6-4-1 is a square, that is, the corresponding shape of the plug hole 6-8 is a square hole.

[0057] Specific implementation method seven: This implementation method is a further limitation of specific implementation methods one, two, three, four, five or six, and the ratio of the length of the square cylinder 6-4-1 to the length of the circular cylinder 6-4-2 is 1:3.

[0058] This ratio is the optimal length ratio determined during the design and development process, which is conducive to providing sufficient space for the twisting operation of the support rod 6 and can also ensure the basic height of the roller skates.

[0059] Specific embodiment eight: This embodiment is a further limitation of specific embodiments one, two, three, four, five, six or seven. The bottom end of the connecting member 6-6 is processed with a connecting portion 8 that matches the pulley 7 one by one. The longitudinal cross-section shape of the connecting member 6-6 along its length direction is a triangle, and the two end corners at the bottom of the connecting member 6-6 are two connecting portions 8.

[0060] Specific embodiment 9: This embodiment is a further limitation of specific embodiments 1, 2, 3, 4, 5, 6, 7 or 8, and the upper end of each support rod 6 is hinged to the inner wall of the end of the mounting groove 3. Such a setting can ensure the opening direction of the support rod 6, facilitate the opening action during wearing, and reduce the difficulty of operation.

[0061] Specific embodiment ten: This embodiment is a further limitation of specific embodiments one, two, three, four, five, six, seven, eight or nine. At least one protrusion is processed on the outer wall of the outer cover body 6-1, and a slot matching the protrusion is processed on the side wall of the mounting groove 3. The protrusion and the slot are snap-fitted to achieve a locking effect of fixing the deformable wheel assembly 2 when the shoe body 1 is in the storage state.

[0062] Furthermore, the protrusion is an elastic protrusion made of existing rubber or plastic.

[0063] Furthermore, the two support rods 6 are arranged one in front of the other in the length direction of the shoe body 1, and the operation order of the two support rods 6 is not limited, and the front support rod 6 can be operated first, and then the rear support rod 6. Alternatively, the rear support rod 6 can be operated first, and then the front support rod 6 can be operated.

[0064] Furthermore, the shoe body 1 can be an existing shoe body, and there is no need to perform any additional structural processing to increase the height of the shoe body 1 .

[0065] Specific embodiment eleven: This embodiment is a further limitation of specific embodiments one, two, three, four, five, six, seven, eight, nine or ten. The connector 6-6 has two connecting parts 8, and the connector 6-6 is provided with reinforcing ribs 6-9 for reinforcing the compression and tensile strength of the connector 6-6. The shape of the reinforcing ribs 6-9 matches the edge shape of the connector 6-6. The reinforcing ribs 6-9 are preferably in the shape of arc strips.

[0066] Working process:

[0067] The operation process of converting ordinary walking shoes into roller skates of the present invention is divided into a 90+β degree turning operation of the deformable wheel assembly 2 and a 90 degree turning operation of the pulley 7.

[0068] The 90+β degree turning operation of the deformable wheel assembly 2 is as follows:

[0069] Grasp the support rod 6 with your hand, and apply force to rotate the support rod 6 from the horizontal position parallel to the bottom of the mounting groove 3 to the vertical position through the mounting groove 3 at the bottom of the shoe body 1, that is, the connecting member 6-6 rotates 90+β degrees driven by the rotating shaft 6-2, thereby driving the pulley 7 to make a synchronous rotation movement. After the above process is completed, the axial direction of the pulley 7 is in the same direction as the length direction of the shoe body 1.

[0070] Then the pulley 7 is further turned 90 degrees:

[0071] Since the spring 6-7 is in a primary compression state before twisting, the connecting piece 6-6 is pulled down to move the plug 6-4 downward in the outer cover 6-1, and the compression spring 6-7 is in a secondary compression state. Until the top of the plug 6-4 is completely out of the socket 6-8, the plug 6-4 is rotated horizontally, and the rotation angle is 90 degrees. The degree of rotation is to ensure that the axis connection line of the two pulleys 7 on the same support rod 6 is parallel to the bottom surface of the shoe body 1 and the rotation can be stopped. After rotating 90 degrees, the plug 6-4 is released, and the spring 6-7 is converted from the secondary compression state to the primary compression state. The plug 6-4 is inserted into the socket 6-8 for the second time, and the 90-degree rotation process of the plug 6-4 is completed. That is, the pulley 7 is driven to make a synchronous rotation action through the rotation of the plug 6-4 through the connecting piece 6-6, so that each pulley 7 is on the same parallel line, reaching the use state, that is, the height direction of the pulley 7 is in the same direction as the height direction of the shoe body 1.

[0072] The operation process of converting roller skates into common walking shoes is the reverse operation of the above process.

[0073] The following embodiments are described in conjunction with the beneficial effects of the present invention:

[0074] Embodiment 1: In this embodiment, taking a size 42 shoe as an example, b=100 mm, h=100 mm, d=200 mm.

[0075] When the two pulleys 7 on the same support rod 6 are not tilted, α=90°.

[0076] Φ=b / (2sinα)=b / 2=50mm, L=d+Φ+hcosα=d+b / 2=250mm.

[0077] When the two pulleys 7 on the same support rod 6 are tilted to the maximum, α=60°,

[0078] Φ=b / (2sinα)=57.74mm, L=d+Φ+hcosα=307.74mm.

[0079] By comparison, when the two pulleys 7 are tilted at α=60°, the diameter Φ of the pulley 7 increases by 7.74 mm, which is 15.48% higher than when the two pulleys 7 are not tilted. The distance L between the axis of the first wheel and the axis of the tail wheel increases by 57.74 mm, which is 23.09% higher than when the two pulleys 7 are not tilted. Therefore, after the two pulleys 7 are tilted, the gliding speed is faster and the stability is better at the same speed.

[0080] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A height-reducing and speed-increasing roller skate, characterized in that: The shoe body (1) comprises a shoe body and a deformable wheel assembly (2). The bottom of the shoe body (1) is processed with a mounting groove (3). The deformable wheel assembly (2) comprises two support rods (6) and four pulleys (7). The two support rods (6) are arranged in the mounting groove (3) along the length direction of the shoe body (1). The upper end of each support rod (6) is hinged in the mounting groove (3). The lower end of each support rod (6) is provided with two pulleys (7) in parallel. An angle α is formed between the axis connecting the two pulleys (7) on the same support rod (6) and the central axis of the length direction of the support rod (6). When the pulley (7) is in the mounting groove (3), the axial direction of the pulley (7) is in the same direction as the height direction of the shoe body (1). When the pulley (7) is in a sliding state, the axial direction of the pulley (7) is in the same direction as the width direction of the shoe body (1). The value range of the angle α is 60°~75°; When the four pulleys (7) are all in a sliding state, the angle between the central axis of the support rod (6) in the length direction and the height direction of the shoe body (1) is β, and the sum of the angle β and the angle α is equal to 90°; One of the two support rods (6) close to the toe of the shoe body (1) is a front support rod, and the other of the two support rods (6) close to the heel of the shoe body (1) is a rear support rod. When the four pulleys (7) are all in a sliding state, the pulley (7) at the lower end of the front support rod close to the toe of the shoe body (1) is a first pulley, and the pulley (7) at the lower end of the rear support rod close to the heel of the shoe body (1) is a tail pulley. The distance between the axis of the first pulley and the axis of the tail pulley is L. The support rod (6) comprises an outer cover (6-1), a rotating shaft (6-2), an inner plug (6-3), an insert block (6-4), a limiting plate (6-5), a connecting piece (6-6) and a spring (6-7). The inner plug (6-3) is arranged in the outer cover (6-1). The rotating shaft (6-2) is passed through the inner plug (6-3). Both ends of the rotating shaft (6-2) pass through the side walls of the outer cover (6-1) and are hingedly connected to the side walls of the installation groove (3). The lower end of the inner plug (6-3) is A plug hole (6-8) is processed, a limit plate (6-5) is fixedly mounted on the plug block (6-4), the upper end of the plug block (6-4) is detachably connected to the plug hole (6-8), the lower end of the plug block (6-4) passes through the outer cover (6-1) and is integrally connected to the upper end of the connecting piece (6-6), the spring (6-7) is mounted on the plug block (6-4) and is located between the limit plate (6-5) and the bottom surface of the outer cover (6-1), and the lower end of the connecting piece (6-6) is hinged with two pulleys (7); The insert block (6-4) is a special-shaped block, and the insert block (6-4) comprises a square column (6-4-1) and a round column (6-4-2), and the square column (6-4-1) and the round column (6-4-2) are fixedly connected in sequence from top to bottom to form a whole; The bottom end of the connecting piece (6-6) is processed with a connecting portion (8) that matches the pulley (7) one by one. The longitudinal cross-section of the connecting piece (6-6) along its length direction is an oblique triangle. The two end corners of the bottom of the connecting piece (6-6) are two connecting portions (8).

2. The height-reducing and speed-increasing roller skates according to claim 1, characterized in that: The ratio of the length of the square cylinder (6-4-1) to the length of the circular cylinder (6-4-2) is 1:

3.

3. The height-reducing and speed-increasing roller skates according to claim 1, characterized in that: The upper end of each support rod (6) is hinged to the inner wall of the end of the mounting groove (3).

Images