CN115251526A

CN115251526A - Shoe size quick adjustment device and racing shoes with same

Info

Publication number: CN115251526A
Application number: CN202210869554.XA
Authority: CN
Inventors: 余文良; 余亭宏; 余权洪; 邱瑞霞
Original assignee: Guangzhou Yongyuan Sporting Goods Technology Co ltd
Current assignee: Guangzhou Yongyuan Sporting Goods Technology Co ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-11-01
Anticipated expiration: 2042-07-22
Also published as: CN115251526B

Abstract

The invention discloses a shoe size quick adjusting device and a racing shoe with the same, wherein the shoe size quick adjusting device comprises a shoe bottom part and a shoe head part capable of moving back and forth on the shoe bottom part, positioning holes are arranged on the bottom surface of the shoe head part, and fixing latch teeth are correspondingly arranged on one side of each positioning hole; an elastic member disposed between the shoe bottom and the toe cap; a locking mechanism capable of locking the position of the toe cap relative to the sole; the invention provides a shoe size adjusting mechanism capable of resisting one side of a fixed latch, and aims to provide a scheme that a telescopic spring is arranged between a shoe bottom and a shoe head to push the shoe head to slide forwards on the shoe bottom, a row of positioning holes are formed in the bottom surface of the shoe head, a mandril capable of moving up and down is movably accommodated in the shoe bottom, and the locking wrench on the bottom surface of the shoe bottom is used for overturning and driving the mandril to move out of or insert into the positioning holes, so that the effect of locking after the shoe size is adjusted quickly can be achieved.

Description

Shoe size quick adjustment device and racing shoes with same

Technical Field

The invention relates to the field of racing sports equipment, in particular to a shoe size quick adjusting device and a racing shoe with the same.

Background

With the increasing life of people, skating and roller skating, which require sports finished by means of special racing shoes, are gradually developed from adult sports to national sports which participate in all ages.

In the existing market racing shoes, most of users with different ages and foot sizes can only buy shoes with different sizes correspondingly aiming at the feet with different ages and different sizes, and for the crowds such as young children, the foot sizes can also change rapidly due to the fast growth speed, so that the users need to continuously change and buy the shoes with the proper sizes. At this point, racing footwear that can adjust shoe size begins to appear.

However, the conventional racing shoes capable of adjusting shoe sizes are complex to operate and slow to adjust, and users cannot intuitively know whether the adjusted length is appropriate or not when adjusting the racing shoes, and only can continuously repeat the same operation to try, so that the time is consumed.

Disclosure of Invention

The invention aims to provide a shoe size quick adjusting device and a racing shoe with the same.

In order to achieve the purpose, the invention adopts the following scheme: a shoe size quick adjusting device comprises:

the shoe comprises a shoe bottom, a shoe head part capable of moving back and forth on the shoe bottom is arranged on the shoe bottom in a sliding mode, a plurality of positioning holes are sequentially arranged on the bottom surface of the shoe head part at intervals, and fixing clamping teeth corresponding to the positioning holes are arranged on one side of each positioning hole;

the elastic piece is arranged between the shoe bottom and the shoe head and can drive the shoe head to move forwards relative to the shoe bottom;

the locking mechanism can be inserted into the positioning hole in a vertically movable mode and locks the position of the toe cap relative to the shoe bottom, and the locking mechanism is arranged on the shoe bottom;

the shoe size adjusting mechanism can be abutted against one side of the advancing direction of the fixed clamping teeth, is arranged on the shoe bottom part on one side of the locking mechanism, and can be driven to leave the fixed clamping teeth after the locking mechanism moves downwards to leave the positioning hole;

the reset piece is arranged on one side of the shoe size adjusting mechanism and used for resetting and blocking on the next fixed latch after the shoe size adjusting mechanism leaves the blocked fixed latch.

As a further scheme of the invention, a concave accommodating cavity is arranged on the top surface of the shoe bottom part corresponding to the positioning hole and the fixed latch, and the shoe size adjusting mechanism, the reset piece and the adjusting mechanism are arranged in the accommodating cavity.

As a further scheme of the invention, the shoe size adjusting mechanism comprises a main latch which is hinged in the accommodating cavity and the end part of which can be mutually abutted with one side of the advancing direction of the fixed latch, an auxiliary latch which is coaxial with the main latch is hinged on one side of the main latch, a synchronous rod which can be movably clamped and pressed on the main latch is arranged on the auxiliary latch, after the locking mechanism moves downwards to leave the positioning hole, the auxiliary latch is extruded to drive the main latch to synchronously turn downwards, and the resetting pieces are respectively arranged on the main latch and the auxiliary latch.

As a preferable scheme of the present invention, a main shaft rod is disposed in the accommodating cavity, and shaft holes capable of being sleeved on the main shaft rod are respectively disposed on the main latch and the auxiliary latch.

As a further aspect of the present invention, the reset member includes a first torsion spring sleeved on the spindle rod on the side of the main latch and capable of keeping the main latch in an upward-turned state, and a second torsion spring sleeved on the spindle rod on the side of the secondary latch and capable of keeping the secondary latch in a downward-turned state, one end of the first torsion spring is anchored at the bottom of the main latch, the other end of the first torsion spring is anchored in the accommodating cavity, one end of the second torsion spring is anchored at the secondary latch, and the other end of the second torsion spring is anchored in the accommodating cavity.

As a further scheme of the invention, the locking mechanism comprises a mandril which is vertically and movably arranged in the accommodating cavity, the top end of the mandril can be inserted into the positioning hole, the lower end of the mandril passes through the bottom of the accommodating cavity and extends out of the lower part of the bottom surface of the shoe bottom, a locking wrench which can be turned over is arranged on the bottom surface of the shoe bottom, the locking wrench is hinged to the bottom of the mandril and can pull the mandril to move downwards, and a return spring which can be sleeved on the mandril and can drive the mandril to move upwards again to reset after the mandril moves downwards is arranged in the accommodating cavity; and a stirring piece which can stir the auxiliary latch to turn downwards after the ejector rod moves downwards to leave the positioning hole is arranged on the ejector rod.

Preferably, the tooth top of the main latch is provided with a notch, the synchronization rod is embedded in the notch when the auxiliary latch turns downwards, and the synchronization rod leaves the notch when the auxiliary latch turns upwards.

As a preferable scheme of the invention, the elastic element comprises an expansion spring arranged at the tail end of the toe cap part, a convex block is arranged on the top surface of the sole part, a guide post extends backwards from the tail end of the toe cap part, a through hole capable of allowing the guide post to pass through is arranged on the convex block, the expansion spring is sleeved on the guide post, and the tail end of the expansion spring is abutted against the convex block.

As a preferable scheme of the present invention, the cross section of the fixed latch is a right triangle, the end of the main latch abuts against the right-angled edge of the fixed latch, and the top surface of the main latch near the front end is arc-shaped.

The invention also provides a pair of racing shoes, which comprises the shoe size quick adjusting device, wherein a guide groove is formed in the bottom surface of the toe part, and a guide block which is upwards protruded and can move back and forth in the guide groove is fixedly arranged on the sole part.

In summary, compared with the prior art, the invention has the beneficial effects that: in addition, the shoe size adjusting mechanism with a simple structure is more convenient and faster in the operation of adjusting the shoe size, the shoe size can be adjusted to the required shoe size without repeatedly repeating the same action, and particularly, the shoe size adjusting mechanism is more convenient and faster for users who do not fit feet under the condition of wearing protective equipment outdoors or sliding and need to operate the shoe size adjustment.

Drawings

FIG. 1 is a perspective view of one of the racing shoes of the present invention.

FIG. 2 is a second perspective view of the racing shoe of the present invention.

FIG. 3 is one of the cross-sectional views of the racing shoe of the present invention, and an enlarged view of the shoe size adjustment mechanism shown partially in a locked condition.

Fig. 4 is a second cross-sectional view of the racing shoe of the present invention, and an enlarged view of the shoe size adjustment mechanism shown partially in an open state.

FIG. 5 is a third cross-sectional view of the racing shoe of the present invention, and an enlarged view of the shoe size adjustment mechanism portion of the shoe size adjustment mechanism in the closed process position.

Fig. 6 is one of the exploded views of the present invention.

FIG. 7 is a second exploded view of the present invention, and an enlarged view of a portion of the area in the figure.

FIG. 8 is a third exploded view of the present invention and an enlarged view of a portion of the area in the third exploded view.

Fig. 9 is a schematic perspective view of the primary latch and the secondary latch according to the present invention.

Detailed Description

The following detailed description provides many different embodiments or examples for implementing the invention. Of course, these are merely embodiments or examples and are not intended to be limiting. In addition, repeated reference numbers, such as repeated numbers and/or letters, may be used in various embodiments. These iterations are provided for simplicity and clarity of the description of the invention and are not intended to suggest any particular relationship between the various embodiments and/or configurations discussed.

Furthermore, spatial relationships, such as "below," "lower," "inside-out," "above," "upper" and the like, may be used to facilitate describing the relationship of one element or feature to another element or feature in the drawings, including different orientations of the device in use or operation and the orientation depicted in the drawings. The devices may be rotated 90 degrees or other orientations from different orientations and the spatially relative descriptors used therein should be interpreted as such and are not to be construed as limiting the invention, and the terms "first" and "second" are used for descriptive purposes only and are not intended to indicate or imply relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The invention will be further described with reference to the following description and embodiments in conjunction with the accompanying drawings: as shown in fig. 1 to 4, a shoe size quick adjustment device comprises a shoe bottom 1, a shoe head 2 capable of moving back and forth on the shoe bottom 1 is slidably arranged on the shoe bottom 1, a plurality of positioning holes 21 are sequentially arranged on the bottom surface of the shoe head 2 at intervals, and a fixing latch 22 corresponding to the positioning holes 21 is respectively arranged on one side of each positioning hole 21; the elastic piece 3 is arranged between the shoe bottom 1 and the shoe head 2 and can drive the shoe head 2 to move forwards relative to the shoe bottom 1, the elastic piece 3 comprises an expansion spring 31 arranged at the tail end of the shoe head 2, a convex block 32 is arranged on the top surface of the shoe bottom 1, a guide post 33 extends backwards from the tail end of the shoe head 2, a through hole 34 capable of allowing the guide post 33 to pass through is arranged on the convex block 32, the expansion spring 31 is sleeved on the guide post 33, and the tail end of the expansion spring is propped against the convex block 32; the locking mechanism 4 can be inserted into the positioning hole 21 up and down movably and locks the position of the toe cap part 2 relative to the shoe bottom part 1, and the locking mechanism 4 is arranged on the shoe bottom part 1. Specifically, the method comprises the following steps: a concave accommodating cavity 11 is arranged on the top surface of the shoe bottom 1 corresponding to the positioning hole 21 and the fixing latch 22, and the locking mechanism 4 is arranged in the accommodating cavity 11.

In order to lock the position of the toe cap part 2 after moving relative to the shoe bottom part 1 and further realize the adjustment to the required number, in the embodiment, the opening position of the accommodating cavity 11 is expanded to one side to form an accommodating space 111 which is also recessed downward and formed on the top surface of the shoe bottom part 1, that is, the accommodating cavity 11 itself is composed of a recessed accommodating space 111 and an accommodating groove 112 recessed again in the middle thereof, the locking mechanism 4 is arranged in the accommodating groove 112 recessed again in the middle of the accommodating space 111, the accommodating space 111 on one side of the accommodating groove 112 is provided with the shoe size adjusting mechanism 5 which can resist one side of the advancing direction of the fixed latch 22, and after the locking mechanism 4 moves downward and leaves the positioning hole 21, the shoe size adjusting mechanism 5 can be driven to leave the fixed latch 22; when the locking mechanism 4 needs to be separated from the shoe size adjusting mechanism 5, the resetting piece 6 arranged on one side of the shoe size adjusting mechanism 5 enables the shoe size adjusting mechanism 5 to be reset again and abut against the next fixed latch 22 which is moved after being separated from the abutted fixed latch 22.

As shown in fig. 3 to 9, the shoe size adjusting mechanism 5 includes a main shaft rod 12 disposed in the accommodating space 111 on one side of the accommodating groove 112, and a main latch 51 hinged to the main shaft rod 12 and having an end portion capable of abutting against one side of the fixed latch 22 in the advancing direction, a sub latch 52 coaxial with the main latch 51 is hinged to one side of the main latch 51, shaft holes 54 are respectively disposed on the main latch 51 and the sub latch 52 so as to be sleeved on the main shaft rod 12, a synchronizing rod 53 capable of being movably clamped on the main latch 51 is disposed on the sub latch 52, a notch 511 is disposed at the top of the main latch 51, the synchronizing rod 53 is embedded in the notch 511 when the sub latch 52 turns downward, the synchronizing rod 53 leaves the notch 511 when the sub latch 52 turns upward, and the locking mechanism 4 moves downward and leaves the positioning hole 21, the auxiliary latch 52 is pressed to drive the main latch 51 to synchronously turn downwards through the synchronous rod 53, in addition, the reset piece 6 is respectively arranged on the main latch 51 and the auxiliary latch 52, specifically, the reset piece 6 comprises a first torsion spring 61 which is sleeved on the main shaft rod 12 on one side of the main latch 51 and can keep the main latch 51 in a state of turning upwards, and a second torsion spring 62 which is sleeved on the main shaft rod 12 on one side of the auxiliary latch 52 and can keep the auxiliary latch 52 in a state of turning downwards, one end of the first torsion spring 61 is anchored at the bottom of the main latch 51, the other end of the first torsion spring is anchored in the accommodating space 111, one end of the second torsion spring 62 is anchored on the auxiliary latch 52, the other end of the second torsion spring is anchored in the accommodating space 111, the torsion force of the first torsion spring 61 is greater than the torsion force of the second torsion spring 62, and the torsion force of the first torsion spring 61 is greater than the elastic force of the expansion spring 31, so that the main latch 51 can be constantly kept in the raised state against the main latch 51 without being subjected to the force of external manual intervention. It should be noted that the cross-section of the fixed latch 22 is a right triangle, the right-angle side of the fixed latch 22 faces the forward direction of the toe cap 2, the end of the main latch 51 abuts against the right-angle side of the fixed latch 22, and the side of the main latch 51 facing away from the forward direction is a hypotenuse, so that the design is that when the toe cap 2 needs to move backward, the main latch 51 does not need to be operated, the toe cap 2 can be easily pushed to move towards the heel direction of the sole 1, meanwhile, the top surface of the main latch 51 close to the front end is arc-shaped, so that when the main latch 61 turns downward, the bottom tip part of the fixed latch 22 can be better and more smoothly passed over.

As shown in fig. 3 to 8, the locking mechanism 4 includes a push rod 41 vertically and movably disposed in a receiving groove 112 formed by re-recessing the middle of the receiving space 111, and the top end of the push rod 41 can be inserted into the positioning hole 21, the lower end of the push rod 41 passes through the bottom of the receiving cavity 11 and extends out of the bottom surface of the sole 1, a reversible locking wrench 42 is disposed on the bottom surface of the sole 1, the locking wrench 42 is hinged to the bottom of the push rod 41, one end of the locking wrench 42 extends out of a pressing portion 421, when the locking wrench 42 is turned downward, the push rod 41 can be pulled downward by the pressing portion 421 to further pull the end of the push rod 41 out of the positioning hole 21, and a return spring 43 capable of being sleeved on the push rod 41 and driving the push rod 41 to move upward again to reset after the push rod 41 moves downward is disposed in the receiving cavity 11; the push rod 41 is provided with a toggle member 7 which can toggle the secondary latch 52 to turn down after the push rod 41 moves down and leaves the positioning hole 21, and toggle the secondary latch 52 to turn up when the push rod 41 moves up, in this embodiment, the toggle member 7 is fixed in a disc shape at a position close to the top end of the push rod 41, and the toggle member 7 and the push rod 41 are coaxial, as can be seen from the figure, the top surface of the toggle member 7 and the bottom surface of the secondary latch 52 are both inclined surfaces, and the bottom surface of the toggle member 7 and the top surface of the secondary latch 52 are both flat surfaces, so that when the toggle member 7 moves down along with the push rod 41, the edge of the toggle member 7 can stably clamp the top surface of the secondary latch 52 to force the secondary latch 52 to turn down, because the trajectory of the end movement of the secondary latch 52 is arc-shaped when the secondary latch 52 turns over, after the secondary latch 52 carries the primary latch 51 to turn over for a certain distance, the toggle member 7 can be separated from the secondary latch 52, and under the torsional force of the first torsion spring 61, the primary latch 51 can push against the synchronizing rod 53 to drive the secondary latch 52 to move up, and the primary latch 51 to quickly move down, and the torsion spring 22 can also provide a better control concept that the first spring 22 can move forward, and the first telescopic spring 22 can be more quickly: a damping rubber ring is provided in a through hole 34 of the protrusion 32, and the guide post 33 is inserted into the damping rubber ring, so that when the extension spring 31 pushes the toe cap 2 forward, the toe cap moves forward slowly, and the main latch has enough time to lift up against the next fixed latch 22 moving forward. When the ejector rod 41 needs to be inserted into the positioning hole 21 again, the locking wrench 42 turns upwards, the top end of the return spring 43 presses below the shifting member 7, the bottom end of the return spring 43 presses on the bottom surface of the inner cavity of the accommodating cavity 11, the elastic force of the return spring 43 drives the shifting member 7 to move upwards along with the ejector rod 41 and press against the secondary latch 52 to turn upwards, at this time, the inclined surfaces on the shifting member 7 and the secondary latch 52 can slide conveniently, the secondary latch 52 turns upwards independently, the primary latch 51 is not affected, when the secondary latch 52 turns upwards for a certain distance, the secondary latch 52 is separated from the top surface of the shifting member 7 and turns downwards again under the action force of the second torsion spring 62 to reset, and after the locking wrench 42 turns horizontally, the locking wrench 42 and the pressing portion 421 at the front end thereof are attached to the bottom surface of the sole portion in a horizontal plane, and the hinged position of the locking wrench 42 and the ejector rod 41 is located between the locking wrench 42 and the pressing portion 421 at the front end thereof, and the locking wrench 42 is fixed at the bottom surface of the wrench 1 by the upward pressing force of the return spring 43.

In the above embodiment, when the distance between the toe cap parts 2 that the sole parts 1 move relatively needs to be adjusted to lengthen or shorten the shoe size, the locking wrench 42 is turned downwards until the main latch 51 is separated from the fixed latch 22, and the shifting member 7 is not separated from the auxiliary latch 52, and then the toe cap part 2 is moved forwards until reaching the required size, the locking wrench 42 is continuously turned to be upright to separate the shifting member 7 from the auxiliary latch 52, and the main latch 51 tilts upwards to prop against the fixed latch 22; or the locking wrench is directly turned upwards, so that the ejector rod 41 moves upwards to be inserted into the positioning hole 21, and shoe size adjustment is completed.

In addition, as shown in fig. 1 to 8, the racing shoe provided by the present invention is clearly seen from the drawings, and comprises the shoe size quick adjustment device, wherein a guide groove 20 is arranged on the bottom surface of the toe cap part 2, a guide block 13 which protrudes upwards and can move back and forth in the guide groove 20 is fixedly arranged on the sole part 1, and size scales and indication marks capable of indicating the size are respectively arranged on the toe cap part 2 and the sole part 1, so that a user can more intuitively and clearly see the shoe size in the current state.

While there have been shown and described the fundamental principles and principal features of the invention and advantages thereof, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are given by way of illustration of the principles of the invention, but is susceptible to various changes and modifications without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A shoe size quick adjustment device is characterized by comprising:

the shoe comprises a shoe bottom (1), a toe cap part (2) capable of moving back and forth on the shoe bottom (1) is arranged on the shoe bottom (1) in a sliding mode, a plurality of positioning holes (21) are sequentially arranged on the bottom surface of the toe cap part (2) at intervals, and fixing clamping teeth (22) corresponding to the positioning holes (21) are arranged on one side of each positioning hole (21);

the elastic piece (3) is arranged between the shoe bottom (1) and the shoe head part (2) and can drive the shoe head part (2) to move forwards relative to the shoe bottom (1);

the locking mechanism (4) can be inserted into the positioning hole (21) up and down movably and locks the position of the toe cap part (2) relative to the shoe bottom part (1), and the locking mechanism (4) is arranged on the shoe bottom part (1);

the shoe size adjusting mechanism (5) can resist one side of the fixed latch (22) in the advancing direction, the shoe size adjusting mechanism (5) is arranged on the shoe bottom (1) on one side of the locking mechanism (4), and when the locking mechanism (4) moves downwards to leave the positioning hole (21), the shoe size adjusting mechanism (5) can be driven to leave the fixed latch (22);

the resetting piece (6) is arranged on one side of the shoe size adjusting mechanism (5), and is used for resetting and blocking on the next fixed latch (22) again after the shoe size adjusting mechanism (5) leaves the blocked fixed latch (22).

2. The shoe size quick adjusting device according to claim 1, characterized in that a concave receiving cavity (11) is formed on the top surface of the shoe bottom (1) corresponding to the positioning hole (21) and the fixing latch (22), and the shoe size adjusting mechanism (5), the reset piece (6) and the locking mechanism (4) are arranged in the receiving cavity (11).

3. The shoe size quick adjusting device according to claim 2, wherein the shoe size adjusting mechanism (5) comprises a main latch (51) hinged in the accommodating chamber (11) and having an end portion capable of abutting against one side of the fixed latch (22) in the advancing direction, one side of the main latch (51) is hinged with a secondary latch (52) coaxial with the main latch (51), a synchronizing rod (53) capable of being movably clamped and pressed on the main latch (51) is arranged on the secondary latch (52), the secondary latch (52) is squeezed to drive the main latch (51) to synchronously turn downwards after the locking mechanism (4) moves downwards to leave the positioning hole (21), and the reset member (6) is respectively arranged on the main latch (51) and the secondary latch (52).

4. The device for quickly adjusting shoe size according to claim 3, wherein a main shaft rod (12) is disposed in the accommodating cavity (11), and the main latch (51) and the auxiliary latch (52) are respectively provided with a shaft hole (54) capable of being sleeved on the main shaft rod (12).

5. The quick shoe size adjusting device according to claim 4, wherein the reset member (6) comprises a first torsion spring (61) which is sleeved on a spindle rod (12) on one side of the main latch (51) and can keep the main latch (51) in an upward-overturning state, and a second torsion spring (62) which is sleeved on the spindle rod (12) on one side of the auxiliary latch (52) and can keep the auxiliary latch (52) in a downward-overturning state, wherein one end of the first torsion spring (61) is anchored at the bottom of the main latch (51), the other end of the first torsion spring is anchored in the accommodating cavity (11), one end of the second torsion spring (62) is anchored on the auxiliary latch (52), and the other end of the second torsion spring is anchored in the accommodating cavity (11).

6. The shoe size quick adjusting device according to claim 3, wherein the locking mechanism (4) comprises a top rod (41) which is vertically and movably arranged in the accommodating cavity (11) and the top end of which can be inserted into the positioning hole (21), the lower end of the top rod (41) passes through the bottom of the accommodating cavity (11) and extends out of the lower part of the bottom surface of the shoe bottom part (1), a reversible locking wrench (42) is arranged on the bottom surface of the shoe bottom part (1), the locking wrench (42) is hinged to the bottom of the top rod (41) and can pull the top rod (41) to move downwards, and a return spring (43) which can be sleeved on the top rod (41) and can drive the top rod (41) to move upwards again after moving downwards is arranged in the accommodating cavity (11); the ejector rod (41) is provided with a toggle piece (7) which can toggle the auxiliary latch (52) to turn down after the ejector rod (41) moves down to leave the positioning hole (21), the top end of the return spring (43) is pressed against the lower part of the toggle piece (7), and the bottom end of the return spring (43) is pressed against the bottom surface of the inner cavity of the accommodating cavity (11).

7. The device for quickly adjusting shoe size according to claim 6, characterized in that a notch (511) is formed at the top of the main latch (51), the synchronization rod (53) is embedded in the notch (511) when the auxiliary latch (52) turns downwards, and the synchronization rod (53) leaves the notch (511) when the auxiliary latch (52) turns upwards.

8. The shoe size quick adjusting device according to claim 1, wherein the elastic member (3) comprises a telescopic spring (31) disposed at the tail end of the toe cap portion (2), a protrusion (32) is disposed on the top surface of the sole portion (1), a guide post (33) extends rearward from the tail end of the toe cap portion (2), a through hole (34) through which the guide post (33) can pass is disposed on the protrusion (32), the telescopic spring (31) is sleeved on the guide post (33), and the tail end of the telescopic spring abuts against the protrusion (32).

9. The quick shoe size adjusting device according to any one of claims 3 to 7, wherein the section of the fixed latch (22) is a right triangle, the end of the main latch (51) abuts against the right edge of the fixed latch (22), and the top surface of the main latch (51) near the front end is arc-shaped.

10. A racing shoe, characterized in that, comprises the shoe size quick adjusting device of any one of claims 1 to 10, a guide groove (20) is arranged on the bottom surface of the toe part (2), a guide block (13) which protrudes upwards and can move back and forth in the guide groove (20) is fixedly arranged on the shoe bottom part (1).