A heel conversion mechanism

Abstract

The present application relates to a kind of conversion mechanism of shoe heel, including fixed pin, for being installed in the connecting piece of corresponding heel position of shoe sole, it can be locked with fixed pin, the upper portion of fixed pin is provided with the axial locking groove of arc-shaped structure section, connecting piece is provided with the connecting piece through hole of matching fixed pin insertion on the upper and lower surfaces of connecting piece, at least two positioning beads that can be dynamically matched with axial locking groove clamping are set on the circumference of connecting piece through hole on connecting piece.Equipped with the clamping of positioning bead and axial locking groove, the locking of fixed pin and connecting piece is realized, and the structure is simpler, more convenient for production and use.

Description

Technical Field

[0001] This invention relates to the field of heel-changing shoes, and in particular to a heel conversion mechanism. Background Technology

[0002] High heels are an essential footwear item for modern women. Most high heels have a fixed heel height, but they are unsuitable for certain occasions, such as when driving. In these situations, it's necessary to switch to flat shoes or shoes with lower heels. To meet this need for heel height changes, interchangeable heel shoes have emerged. These shoes allow for the replacement of heels with different heights. Existing interchangeable heel shoes have relatively complex heel-changing structures. For example, in patent CN113693342A, the locking structure that engages with the fixing pin includes a locking top cover and a locking bottom shell forming a cavity. A ferromagnetic movable component is placed within the cavity, along with steel balls, springs, and other parts. The numerous components and structural features of each part make the manufacturing process complex and cumbersome, hindering production. In practical applications, a magnet is required for unlocking, which is inconvenient and requires management. Summary of the Invention

[0003] To address the shortcomings of existing methods, this invention provides a shoe heel conversion mechanism.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: a shoe heel conversion mechanism, including a fixing pin and a connector for installation on the sole corresponding to the heel position, capable of locking and fixing with the fixing pin. The upper part of the fixing pin is provided with an axial locking groove with an arc-shaped cross-section. The connector is provided with a connecting through hole that matches the insertion of the fixing pin and penetrates the upper and lower surfaces of the connector. At least two positioning beads are equally spaced along the circumference of the connecting through hole on the connector, capable of dynamically matching and engaging with the axial locking groove. The top of the connector is provided with a connecting groove, the connecting through hole is located at the bottom of the groove, and two positioning beads are provided on two opposite groove walls of the groove. The two positioning beads are located at both ends of the same radial line of the connecting through hole, and this radial line is perpendicular to the groove wall of the connecting groove. A cover plate is provided on the connecting groove. The top of the fixing pin is a pin head with a spherical crown structure. The fixing pin is positioned near the bottom surface of the pin head along the radial direction of the fixing pin. The device has a recessed portion for fixing the pin that is recessed inwards and surrounds the pin circumference. The axial locking groove is located on the side of the recessed portion away from the pin head. A limiting member is slidably fitted inside the groove of the connector. The limiting member has a through hole that passes through the upper and lower surfaces of the limiting member. The through hole includes a wide portion and a narrow portion in its sliding direction. The width of the wide portion is greater than the diameter of the bottom surface of the pin head, and the width of the narrow portion is less than the diameter of the bottom surface of the pin head but greater than the diameter of the recessed portion of the fixing pin. The pin head passes through the through hole of the connector and the through hole of the limiting member in sequence and is movably engaged with the limiting member for limitation. An adjusting handle extends from the wall of the groove of the connector. The wall of the groove of the connector has an installation groove that communicates with the groove of the connector for installing a positioning bead. A pressure block located on top of the positioning bead is fitted inside the installation groove. An extension arm extends downward from the bottom surface of the cover plate at the position corresponding to the installation groove. The bottom end of the extension arm has an arc-shaped clearance notch to avoid the positioning bead.

[0005] Preferably, the outer wall of the limiting member extends a guide rod in the same direction as its sliding. The groove wall of the connecting member groove is provided with a guide groove that matches the sliding of the guide rod and communicates with the groove of the connecting member. The guide rod is fitted with a telescopic spring with its two ends corresponding to the guide rod and the groove wall of the guide groove. The groove wall of the connecting member groove is also provided with an adjustment through hole through which the adjustment handle passes and moves.

[0006] Preferably, the limiting member has multiple limiting slots with arc-shaped cross-sections on its sidewalls in the sliding direction, the axis of which is perpendicular to the upper surface of the limiting member, and the groove wall of the connecting member is provided with an elastic engaging member that can engage with the limiting slots for limiting.

[0007] Preferably, the shoe also includes a heel, with the retaining pin mounted on the top of the heel.

[0008] Preferably, the top of the heel is provided with a heel groove, and the bottom of the connector extends with a connector protrusion that matches and engages with the heel groove, and the connector through hole is located at the center of the connector protrusion.

[0009] Preferably, a support rod is connected to the lower part of the fixing pin, and the support rod is disposed inside the heel.

[0010] Preferably, the connector is provided with a positioning hole, and the heel is provided with a positioning post that matches and engages with the positioning hole.

[0011] The beneficial effects of this invention are as follows: This invention achieves the locking of the fixing pin and the connecting piece by engaging the positioning bead and the axial locking groove on the fixing pin. The installation of the positioning bead does not require a special structure, which means that the connecting piece does not require a special structure to install the positioning bead, making the structure of the entire conversion mechanism simpler and easier to manufacture. At the same time, the engagement of the positioning bead and the axial locking groove can be achieved by plugging and unplugging, eliminating the need to carry tools and making it easier to use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention without the cover plate;

[0013] Figure 2 This is an exploded structural diagram of an embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the structure of an embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of the structure of the fixing pin in an embodiment of the present invention;

[0016] Figure 5 This is a schematic diagram of the top structure of the connector according to an embodiment of the present invention;

[0017] Figure 6 This is a schematic diagram of the bottom structure of the connector according to an embodiment of the present invention;

[0018] Figure 7 This is a schematic diagram of the structure of the limiting member according to an embodiment of the present invention;

[0019] Figure 8 This is a schematic diagram of the cover plate in an embodiment of the present invention;

[0020] Parts and their numbers in the diagram: 1-Fixing pin; 10-Axial locking groove; 11-Pin head; 12-Fixing pin recess; 2-Connector; 20-Connector through hole; 21-Connector groove; 22-Connector protrusion; 23-Positioning hole; 210-Guide groove; 211-Adjusting through hole; 212-Elastic locking part; 213-Mounting groove; 3-Positioning bead; 30-Pressure block; 4-Cover plate; 40-Extension arm; 41-Arc-shaped clearance notch; 5-Limiting part; 50-Limiting part through hole; 51-Adjusting handle; 52-Guide rod; 53-Limiting slot; 500-Wide part of through hole; 501-Narrow part of through hole; 6-Telescopic spring; 7-Heel; 70-Heel groove; 71-Positioning post; 8-Support rod. Detailed Implementation

[0021] To more clearly illustrate the purpose, technical solutions, and advantages of the embodiments of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments, providing a clear and complete description. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. Furthermore, directional terms mentioned in the present invention, such as "up," "down," "front," "back," "left," "right," "inner," and "outer," are merely for reference to the directions shown in the accompanying drawings. The use of directional terms is for better and clearer explanation and understanding of the present invention, and is not intended to indicate or imply any necessary orientation of the present invention; therefore, it should not be construed as a limitation of the present invention.

[0022] Examples of embodiments of the present invention Figures 1 to 8As shown, a shoe heel conversion mechanism includes a fixing pin 1 and a connector 2 for installation on the sole corresponding to the heel position, capable of locking and fixing with the fixing pin 1. The fixing pin 1 is used to install it inside the heel 7, employing a rigid pin. Installation within the heel 7 can be a fixed installation where the heel 7 is integrally formed during manufacturing, or a detachable installation using a threaded connection. The threaded connection involves an internal thread on the heel 7 and an external thread on the lower outer wall of the fixing pin 1. The connector 2 is used to install on the sole corresponding to the heel position, that is, connecting the connector 2 to the heel of the shoe midsole. The fixing pin 1 and the heel 7 form an integral unit, and the connector 2 and the shoe sole and upper form a whole. The fixing pin 1 and the connector 2 are connected together. The locking mechanism of part 2 connects the sole and heel to form a complete shoe. When the heel needs to be replaced, the connector and fixing pin can be unlocked. The upper part of the fixing pin 1 has an axial locking groove 10 with an arc-shaped cross-section, meaning the axial locking groove 1 has an arc-shaped cross-section and circumferentially surrounds the outer wall of the fixing pin 1 in the radial direction. The connector 2 has a connecting through hole 20 that mates with the insertion of the fixing pin 1, penetrating the upper and lower surfaces of the connector 2. At least two positioning beads 3 are evenly spaced along the circumference of the connecting through hole 20, capable of dynamically engaging with the axial locking groove 10. Dynamic engagement means that after the fixing pin 1 is inserted into the connecting through hole 20, the axial locking groove 10 on the fixing pin 1 engages with the positioning beads 3. When the fixing pin 1 is pulled out of the through hole 20 of the connector, the axial locking groove 10 on the fixing pin 1 separates from the positioning bead 3. At this time, the positioning bead 3 is evenly spaced around the circumference of the connector 2, so that the interaction force between the connector 2 and the positioning bead 3 can be more evenly distributed, facilitating the insertion and removal of the fixing pin 1 in the through hole 20 of the connector. In use, the fixing pin 1 is inserted into the through hole 20 of the connector from the lower end. When the fixing pin 1 touches the positioning bead 3, the lower part of the ball on the positioning bead 3 is subjected to a squeezing force, and the ball retracts into the shell of the positioning bead 3. Then the fixing pin 1 continues to be inserted. After the positioning bead 3 is aligned with the axial locking groove 10 on the fixing pin 1, the force applied to the ball on the positioning bead 3 disappears, and the ball on the positioning bead 3... Once the ball is in the positioning bead 3, it returns to its initial position and engages with the axial locking groove 10, thereby locking the fixing pin 1. To unlock the fixing pin 1 and the connector 2, force is applied to the fixing pin 1 to pull it out of the connector through hole 20. The upper part of the ball on the positioning bead 3 is compressed, causing the ball to retract into the housing of the positioning bead 3, thus pulling the fixing pin 1 out of the connector through hole 29. The positioning bead 3 is an existing product, and its installation does not require a special structure. This means that the connector 2 does not require a special structure to install the positioning bead 3; it can be installed in a mounting hole on the wall of the connector through hole 20. After the positioning bead 3 is installed in the mounting hole, the head of the ball of the positioning bead 3 is inside the connector through hole 20.Alternatively, a mounting groove for the positioning bead 3 can be provided on the connector 2 at the position corresponding to the upper end of the connector through hole 20. In this structure, after the positioning bead 3 is installed in the mounting groove, the head of the positioning bead 3 is within the area covered by the axial vertical projection of the connector through hole 20. After the fixing pin 1 is inserted and its head passes through the connector through hole 20, the positioning bead 3 and the axial locking groove 10 can engage and lock. The structure of the hole and groove is simple and easy to process, making the entire conversion mechanism simpler and easier to manufacture. Furthermore, the engagement of the positioning bead 3 and the axial locking groove 10 can be achieved by simply inserting and removing the bead, eliminating the need to carry tools and making it easier to use.

[0023] Further improvements, such as Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, to facilitate the installation of the positioning beads 3 on the connector 2, the top of the connector 2 is provided with a connector groove 21, and the connector through hole 20 is provided at the bottom of the connector groove 21. Two positioning beads 3 are provided and are provided on two opposite groove walls of the connector groove 21. The two positioning beads 3 are located at both ends of the same radial line of the connector through hole 20, and this radial line is perpendicular to the groove wall of the connector groove 21. That is to say, the connector through hole 20 is located on the axis of the connector groove 21 in the front-back direction. The position in the front-back direction, whether it is near the rear end, near the front end, or in the middle, is set according to the needs. It is preferred to set it in the middle position. At this time, the positioning beads 3 are provided on the left and right groove walls of the connector groove 21, and the axis of the two positioning beads 3 and the connector through hole 20 are on the same straight line. This straight line and the axis of the connector through hole 20 are on the same straight line. The center lines of the front and rear directions of the connector groove 21 are perpendicular. When the connector through hole 20 is set in the middle position, the positioning bead 3 is also set in the middle position on the groove wall of the connector groove 21. The engagement of the fixing pin 1 and the connector 2 is more stable. The connector groove 21 is covered with a cover plate 4, which closes the connector groove 21 and maintains the smooth structure of the top of the connector 2. This ensures that the positioning bead 3 set on the connector 2 and the fixing pin 1 inserted into the connector through hole 20 do not protrude from the upper surface of the connector 2, thus ensuring comfort when wearing it. The cover plate 4 is detachably installed on the connector 2 using screws or other engaging structures, and it can also cover the connector groove 21. In order to avoid the head of the fixing pin 1 hitting the cover plate 4 when it is inserted, a hole can be set on the cover plate 4 at the position directly above the connector through hole 20 to avoid it. At this point, for the installation of the positioning bead 3, the groove wall of the connector groove 21 is provided with an installation groove 213 that communicates with the connector groove 21 for installing the positioning bead 3. The positioning bead 3 is matched and engaged in the installation groove 213, and the ball head of the positioning bead 3 extends into the connector groove 21. A pressure block 30 is matched and installed in the installation groove 213, which is set on the top of the positioning bead 3. The pressure block 30 is used to close the installation groove 213. At this time, it is preferable that the pressure block 30 is pressed against the top of the positioning bead 3 to fix the structure of the positioning bead 3 in the installation groove 213. This prevents the positioning bead 3 from becoming loose after being subjected to the force of the fixing pin 1, and prevents the positioning bead 3 from falling out of the installation groove 213, which would lead to instability of the installation structure. Figure 8As shown, the bottom surface of the cover plate 4 extends downward with an extension arm 40 at the position corresponding to the mounting groove 213. The bottom end of the extension arm 40 is provided with an arc-shaped clearance notch 41 to avoid the positioning bead 3. The mounting groove 213 can be easily chiseled out on the groove wall of the connector groove 21, which is convenient for processing and also facilitates the installation of the positioning bead 3 in the mounting groove 213. That is, the bottom surface of the cover plate 4 is provided with an extension arm 40 at the position corresponding to the mounting groove 213. First, the positioning bead 3 is installed in the mounting groove 213, and then the pressure block 30 is installed in the mounting groove 213. The cover plate 4 is then placed on the connector groove 21. At this time, the arc-shaped clearance notch 41 on the extension arm 40 of the cover plate 4 will not block the movement of the ball on the positioning bead 3.

[0024] Further improvements, such as Figure 4 As shown, to ensure the stability of the engagement structure between the fixing pin 1 and the positioning bead 3, and to prevent the two from unlocking when the heel gets stuck on the road surface, and also to make heel replacement easier and less strenuous, the top of the fixing pin 1 is a pin head 11 with a spherical crown structure. The fixing pin 1 has a fixing pin recess 12 that is radially recessed inwards from the bottom surface of the pin head 11, encircling the fixing pin 1. The axial locking groove 10 is located on the side of the fixing pin recess 12 away from the pin head 11. Therefore, the structure of the fixing pin 1 consists of four parts, from top to bottom: the pin head 11, the positioning bead 3, the fixing pin 12, the positioning bead 3, the positioning pin 12 ... The diameter of the bottom surface of the pin head 11 and the outer diameter of the pin tail are the same for the fixed pin recess 12, the axial locking groove 10, and the pin tail of the fixing pin 1. These all match the diameter of the through hole 20 of the connector, thus preventing the fixing pin 1 from wobbling within the through hole 20. The outer diameter of the fixed pin recess 12 is smaller than the diameter of the bottom surface of the pin head 11. The space between the axial locking groove 10 and the pin head 11 and the fixed pin recess 12 ensures that when the fixing pin 1 engages with the positioning bead 3, the positioning bead 3 will not touch the pin head 11, thus not affecting the stability of the pin head 11 structure and ensuring its service life. Figure 1 , Figure 2 , Figures 5 to 7As shown, a limiting member 5 is slidably disposed within the connecting member groove 21. The limiting member 5 is located within the connecting member groove 21, and the cover plate 4 is located at the end of the opening of the connecting member groove 21, thus enclosing the limiting member 5 within the connecting member groove 21. The limiting member 5 is provided with a limiting member through hole 50 penetrating the upper and lower surfaces of the limiting member 5. The limiting member through hole 50 includes a wide portion 500 and a narrow portion 501 in its sliding direction. The width of the wide portion 500 is greater than the bottom diameter of the pin head 11, and the width of the narrow portion 501 is less than the bottom diameter of the pin head 11 but greater than the recess of the fixing pin. The diameter of part 12, the pin head 11 passes through the connecting through hole 20 and the limiting through hole 50 in sequence and is movably engaged with the limiting member 5 for limitation, that is, the width of the limiting member 5 is equivalent to the width of the connecting groove 21, the length of the limiting member 5 is less than the length of the connecting groove 21, and at the same time, the bottom surface of the limiting member 5 abuts against the bottom of the connecting groove 21, or a step extends into the groove wall of the connecting groove 21 so that the bottom surface of the limiting member 5 abuts against the upper surface of the step to facilitate the sliding of the limiting member 5. Of course, the edge of the limiting member 5 can also be opened on the groove wall of the connecting groove 21 so that it can be engaged and limited. The sliding groove inside is set at a height higher than that of the positioning bead 3. The pin head 11 passes through the connecting through hole 20 and the through hole width 500 in sequence. Under the sliding of the limiting member 5, the fixing pin 1 engages with the limiting member 5 at the through hole narrow 501. During the sliding of the limiting member 5, when the through hole width 500 is directly above the connecting through hole 20, the pin head 11 of the fixing pin 1 can pass through the connecting through hole 20 and the through hole width 500 in sequence. The fixing pin recess 12 is located at the through hole width 500 of the limiting member through hole 50. At this time, the fixing pin 1 can still be in the limiting member through hole 50. The pin moves in and out, and then the sliding limit member 5 makes the narrow part of the through hole 501 directly above the through hole 20 of the connector. The narrow part of the through hole 501 is then fitted over the recessed part 12 of the fixing pin. At this time, the pin head 11 of the fixing pin 1 cannot be pulled out from the narrow part of the through hole 501, which makes the fixing pin 1 and the limit member 5 stuck together. At the same time, the positioning bead 3 locks the fixing pin 1, which enhances the stability of the locking structure between the fixing pin 1 and the connector 2. When it is necessary to change the pin, the sliding limit member 5 makes the wide part of the through hole 500 directly above the through hole 20 of the connector, and then the fixing pin 1 can be pulled out from the through hole 20 of the connector.The limiting member 5 also extends an adjusting handle 51 that protrudes from the groove wall of the connecting member groove 21. The adjusting handle 51 is used to adjust the sliding of the limiting member 5 within the connecting member groove 21. The fact that the adjusting handle 51 protrudes from the groove wall facilitates adjustment. Correspondingly, the connecting member 2 is provided with an adjusting through hole 211 through which the adjusting handle 51 passes. The adjusting handle 51 can move freely within this adjusting through hole 211 to facilitate the sliding of the limiting member 5. In other words, the groove wall of the connecting member groove 21 also has an adjusting through hole 211 through which the adjusting handle 51 passes and moves. This means that the adjusting through hole 211 provides space for the adjusting handle 51 to move, allowing it to not only pass through but also meet the need for the adjusting handle 51 to adjust the sliding of the limiting member 5.

[0025] At this time, for the sliding of the limiting member 5, a guide rod 52 extends from the outer wall of the limiting member 5 in the same direction as its sliding. The guide rod 52 is used to ensure the sliding direction of the limiting member 5. The adjusting handle 51 and the guide rod 52 can be positioned on opposite sides of the limiting member 5 in its sliding direction. For example, the adjusting handle 51 can be positioned at the front end of the limiting member 5, i.e., the end facing the toe, and the guide rod 52 at the rear end of the limiting member 5. This way, the adjusting handle 51, which protrudes from the connecting member 2, can be hidden in the sole of the shoe, without affecting the shoe's aesthetics. A guide groove 210, corresponding to the guide rod 52, is provided on the groove wall of the connecting piece groove 21. This groove is designed to slide smoothly along the guide rod 52 and communicates with the connecting piece groove 21. A telescopic spring 6 is fitted onto the guide rod 52, with both ends connected to the guide rod 52 and the groove wall of the guide groove 210. Specifically, the telescopic spring 6 is fitted onto the guide rod 52 and is located within the guide groove 210 along with the guide rod 52. One end of the telescopic spring 6 is fixedly connected to the guide rod 52, and the other end is fixedly connected to the groove wall of the guide groove 210 opposite to the end of the guide rod 52. When the spring 6 is in its normal state, the narrow portion 501 of the through hole of the limiting member 5 is directly above the through hole 20 of the connecting member, and the fixing pin 1 cannot freely enter or exit the through hole 50 of the limiting member. When the fixing pin 1 and the connecting member 2 need to be locked together, a force is applied to the adjusting handle 51 to make the limiting member 5 slide in the groove 21 of the connecting member, so that the wide portion 500 of the through hole of the limiting member 5 is directly above the through hole 20 of the connecting member. At this time, the spring 6 is compressed by pressure, and then the fixing pin 1 passes through the through hole 20 and the wide portion 500 of the through hole in sequence. After that, the spring 6 is withdrawn. The pressure of the pin on the telescopic spring 6 causes the limiting member 5 to return to its initial position under the elastic force of the telescopic spring 6. That is, the narrow part of the through hole 501 is positioned directly above the through hole 20 of the connector. The narrow part of the through hole 501 fits into the recess of the fixing pin 12, and the positioning bead 3 engages with the axial locking groove 10. The bottom surface of the pin head 11 presses against the upper end of the narrow part of the through hole 501, so the fixing pin 1 cannot move in the axial direction of the through hole 20 of the connector. This enhances the stability of the locking structure between the fixing pin 1 and the connector 2. The same operation is performed to unlock.In order to position the sliding position of the limiting member 5 so as to facilitate the assembly and disassembly of the fixing pin 1 on the connecting member 2, the limiting member 5 is provided with a plurality of limiting grooves 53 with an arc-shaped cross-section and an axis perpendicular to the upper surface of the limiting member 5 on its side wall in the sliding direction. The groove wall of the connecting member groove 21 is provided with an elastic engaging member 212 that can engage with the limiting groove 53 for positioning. When the limiting member 5 slides, it applies a force to the elastic engaging member 212, which deforms under the force to facilitate the sliding of the limiting member 5. When the limiting groove 53 is opposite to the elastic engaging member 212 as the limiting member 5 slides, the elastic engaging member 212 returns to its original shape under the action of elastic force and engages in the limiting groove 53, thereby positioning the sliding of the limiting member 5. The elastic engaging member 212 can be a V-shaped spring with a rounded top corner or a positioning bead.

[0026] Further improvements, such as Figure 1 and Figure 2 As shown, the shoe also includes a heel 7. The fixing pin 1 is installed on the top of the heel 7. The heel 7 uses heels with different heights and thicknesses. The fixing pin 1 is then installed on the top of the heel 7, making the fixing pin 1 and the heel 7 a whole, thus forming a replaceable finished heel for shoes with this type of conversion mechanism, which is convenient to use. In order to make the connection structure between the heel 7 and the connector 2 tighter and stronger, the top of the heel 7 is provided with a heel groove 70. The bottom of the connector 2 extends with a connector protrusion 22 that matches and engages with the heel groove 70. The connector through hole 20 is located at the center of the connector protrusion 22. In this way, after the heel 7 and the connector 2 are connected, not only is there a connection of the fixing pin 1, but also a multi-point large-area connection and fixation formed by the cooperation between the heel groove 70 and the connector protrusion 22. Finally, the structure between the heel 7 and the connector 2 is more stable during the use of the shoe. The lower part of the fixing pin 1 is connected to a support rod 8, which is set inside the heel 7. The support rod 8 and the heel 7 are integrally formed, which enhances the strength of the heel 7 and also enhances the stability and reliability of the fixing pin 1 within the heel 7. The connector 2 is provided with a positioning hole 23, and the heel 7 is provided with a positioning post 71 that matches and engages with the positioning hole 23. The cooperation between the positioning hole 23 and the positioning post 71 further increases the connection between the heel 7 and the connector 2, enhances the stability of the connection structure, and also prevents relative rotation between the two. At this time, multiple positioning holes 23 can be provided as needed, such as four positioning holes 23. The four positioning holes 23 are located at the four corners of the connector 2, so that four positioning posts 71 are correspondingly provided on the heel 7 to cooperate with the positioning holes 23 for positioning.

[0027] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A shoe heel conversion mechanism, characterized in that: The device includes a fixing pin and a connector for mounting on the sole of a shoe at the heel position, capable of locking and securing with the fixing pin. The fixing pin has an axial locking groove with an arc-shaped cross-section on its upper part. The connector has a through hole that aligns with the insertion of the fixing pin, penetrating the upper and lower surfaces of the connector. At least two positioning beads, dynamically engaging with the axial locking groove, are evenly spaced along the circumference of the through hole on the connector. The connector has a connecting groove at its top, with the through hole located at the bottom of the groove. Two positioning beads are positioned on opposite walls of the groove, located at opposite ends of the same radial line perpendicular to the groove wall. A cover plate covers the connecting groove. The fixing pin has a spherical crown-shaped head at its top, and a circumferential groove is recessed around the fixing pin near the bottom of the head. The fixed pin recess has an axial locking groove located on the side of the fixed pin recess away from the pin head. A limiting member is slidably fitted inside the connecting member groove. The limiting member has a through hole penetrating its upper and lower surfaces. The through hole includes a wide portion and a narrow portion in its sliding direction. The width of the wide portion is greater than the diameter of the bottom surface of the pin head, and the width of the narrow portion is less than the diameter of the bottom surface of the pin head but greater than the diameter of the fixed pin recess. The pin head passes through the connecting member through hole and the limiting member through hole in sequence and is movably engaged with the limiting member for limitation. An adjusting handle extends from the wall of the connecting member groove onto the limiting member. The wall of the connecting member groove has an installation groove that communicates with the connecting member groove for installing a positioning bead. A pressure block located on top of the positioning bead is fitted inside the installation groove. An extension arm extends downward from the bottom surface of the cover plate at the position corresponding to the installation groove. The bottom end of the extension arm has an arc-shaped clearance notch to avoid the positioning bead.

2. The heel conversion mechanism according to claim 1, characterized in that: The outer wall of the limiting member extends a guide rod in the same direction as its sliding. The groove wall of the connecting member groove is provided with a guide groove that matches the sliding of the guide rod and is connected to the groove of the connecting member. The guide rod is fitted with a telescopic spring at both ends that are connected to the guide rod and the groove wall of the guide groove. The groove wall of the connecting member groove is also provided with an adjustment through hole through which the adjustment handle passes and moves.

3. The heel conversion mechanism according to claim 1, characterized in that... The limiting member has multiple limiting slots with arc-shaped cross-sections and axes perpendicular to the upper surface of the limiting member on its side wall in the sliding direction. The groove wall of the connecting member is provided with an elastic engaging member that can engage with the limiting slots for limiting.

4. The heel conversion mechanism according to claim 1, characterized in that... It also includes the heel, with the retaining pin mounted on top of the heel.

5. The heel conversion mechanism according to claim 4, characterized in that... The top of the heel is provided with a heel groove, and the bottom of the connector extends with a connector protrusion that matches and engages with the heel groove. The connector through hole is located at the center of the connector protrusion.

6. The heel conversion mechanism according to claim 4, characterized in that... The lower part of the fixing pin is connected to a support rod, which is located inside the heel.

7. The heel conversion mechanism according to claim 4, characterized in that... The connector is provided with a positioning hole, and the heel is provided with a positioning post that matches and engages with the positioning hole.

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