An easy-to-operate simple heel replacement mechanism

Abstract

The present application relates to a kind of easy-to-operate simple heel replacement mechanism, including locking mechanism, the fixed pin that can be locked with locking mechanism;The upper portion of fixed pin is equipped with at least one axial locking groove with arc-shaped structure section;Locking mechanism includes the shell with internal accommodating cavity, the inner shell with recess being movably arranged in accommodating cavity and being movably arranged in accommodating cavity, the plurality of solid balls that can be matched with axial locking groove and are engaged, the compression spring being arranged in recess, the section of accommodating cavity is inverted trapezoidal structure, the bottom of shell is equipped with first through-hole, the second through-hole is arranged in the groove bottom of recess in inner shell;Fixed pin can be sequentially inserted into compression spring from down to up, through first through-hole, the space formed by the plurality of solid balls, second through-hole, inner shell is also equipped with adjusting rod.The present application is beneficial to operation, can realize replacement of heel without the aid of external tool, structure is more firm, and service life is longer.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of changing heel shoes, in particular to an easy-to-operate simple heel changing mechanism. BACKGROUND

[0002] High-heeled shoes are essential for women, but in some situations, it is not appropriate to wear high-heeled shoes, such as when driving, and also, long-term wearing of high-heeled shoes can cause discomfort to the feet, at which time it is necessary to change the shoes to low-heeled or flat shoes to relieve the discomfort of the feet, and for shoe changing or heel changing, it is extremely inconvenient to change shoes when going out, because people do not carry multiple pairs of shoes with them, and changing heels is simple and easy, and people only need to carry different heights of shoe heels with them. The existing heel changing shoes have a complex and unstable heel changing structure, and some need to use external tools to change the heel, which inevitably needs to carry the tool for changing the heel, and is not convenient to use. SUMMARY

[0003] In view of the existing deficiencies, the present application provides an easy-to-operate simple heel changing mechanism.

[0004] The technical scheme adopted by the present application to solve its technical problems is: an easy-to-operate simple heel replacement mechanism, comprising a locking mechanism for being mounted at the bottom of the shoe sole corresponding to the heel position, and a fixing pin for being mounted in the heel and capable of being locked with the locking mechanism; the upper part of the fixing pin is provided with at least one axial locking groove with an arc-shaped cross section; the locking mechanism comprises a housing provided with a receiving cavity and mounted in the interior of the shoe sole, an inner housing movably arranged in the receiving cavity and provided with a recess at the top, a plurality of solid balls movably arranged in the receiving cavity below the inner housing and capable of being matched and clamped with the axial locking groove and movably abutting against the inner housing, and two compression springs arranged in the recess and having two ends corresponding to the top of the receiving cavity and the bottom of the recess, wherein the cross section of the receiving cavity is in an inverted trapezoidal structure, the housing is provided with a first through hole at the bottom of the receiving cavity, and the inner housing is provided with a second through hole coaxial with the first through hole at the bottom of the recess; the fixing pin can be inserted into the compression spring by sequentially passing through the first through hole, the space surrounded by the plurality of solid balls, and the second through hole from bottom to top; the inner housing is further provided with an adjusting rod capable of being exposed outside the housing and capable of being moved relative to the housing; the mechanism further comprises a heel, the top of the heel is provided with a heel recess matched with the locking mechanism, and the fixing pin is vertically mounted at the bottom of the heel recess; the end of the adjusting rod away from the inner housing is connected with an adjusting knob for being mounted on the shoe sole or the heel; the sidewall of the heel is provided with a heel sliding groove in the vertical direction, the adjusting knob is slidably arranged in the heel sliding groove, the top of the adjusting knob is provided with an adjusting knob sliding groove, the end of the adjusting rod is slidably arranged in the adjusting knob sliding groove, the top of the heel is provided with a heel through hole communicating with the heel sliding groove at a position corresponding to the adjusting knob sliding groove, the adjusting rod passes through the heel through hole and is inserted into the adjusting knob sliding groove to be slidably connected with the adjusting knob; the housing comprises a housing bottom shell and a housing upper cover which are connected to form the receiving cavity, the first through hole is arranged at the bottom of the housing bottom shell, and the upper end of the compression spring is connected to the bottom surface of the housing upper cover.

[0005] Preferably, the inner housing and the housing have the same shape, the sidewall of the inner housing is provided with a plurality of inner housing through holes corresponding to the plurality of solid balls and communicating the receiving cavity and the recess, the solid balls are movably arranged in the receiving cavity and the recess through the inner housing through holes, the groove wall of the recess extends radially inwardly to have an extension arm above the solid balls, and the lower end of the compression spring abuts against the extension arm.

[0006] Preferably, the inner housing is provided with a first slit communicating with the second through hole at the bottom of the recess corresponding to the inner housing through hole, and the first slit is arranged circumferentially on the inner housing with one or a plurality of equal intervals.

[0007] Preferably, the solid balls are provided with three, the extension arms are provided with three and arranged circumferentially on the recess with equal intervals and an interval distance less than the diameter of the solid balls.

[0008] As preferred, the side wall of the inner shell is provided with a second slit along the axial direction thereof, and the second slit is arranged above any one of the through holes of the inner shell.

[0009] As preferred, the mounting block is mounted at the heel of the sole, the side wall of the outer shell is provided with a step away from the axis of the accommodating cavity around the side wall thereof, the top of the mounting block is provided with a mounting block through hole with a T-shaped cross section, and the outer shell is mounted on the mounting block through the mounting block through hole and the bottom of the step is pressed against the hole wall of the mounting block through hole.

[0010] The present application has the advantages of simple structure, fixing pin mounted on the heel, locking mechanism mounted on the midsole of the shoe corresponding to the heel, then locked by the engagement between the limiting movable solid ball and the axial locking groove, no complex structure is needed in the heel, the structure is simplified, the stability of the heel structure is maintained, and the heel is durable. When the heel needs to be replaced, the adjusting rod exposed outside the outer shell is adjusted, the solid ball is slid out of the axial locking groove to realize unlocking, the operation is convenient, and the heel can be replaced without external tools. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a structure schematic diagram of the embodiment of the present application;

[0012] Figure 2 is a structure schematic diagram of the embodiment of the present application;

[0013] Figure 3 is a structure schematic diagram of the embodiment of the present application;

[0014] Figure 4 is a structure schematic diagram of the inner shell of the embodiment of the present application;

[0015] Figure 5 is a structure schematic diagram of the bottom shell of the shell of the embodiment of the present application;

[0016] Figure 6 is a structure schematic diagram of the fixing pin of the embodiment of the present application;

[0017] Figure 7 is a structure schematic diagram of the connecting structure of the adjusting rod and the adjusting knob of the embodiment of the present application;

[0018] Figure 8 is a structure schematic diagram of the combination of the embodiment of the present application and the heel and the mounting block;

[0019] Figure 9 is a structure schematic diagram of the heel of the embodiment of the present application

[0020] Part name and serial number in the figure: 1-fixing pin 10-axial locking groove 2-outer shell 20-housing cavity 21-step 22-shell bottom 23-shell upper cover 200-first through hole 3-inner shell 30-groove 31-inner shell through hole 32-second slit 300-second through hole 301-extension arm 302-first slit 4-solid ball 5-compression spring 6-adjusting rod 7-heel 70-heel groove 71-heel sliding groove 72-heel through hole 8-mounting block 80-mounting block through hole 9-adjusting knob 90-adjusting knob sliding groove. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the purpose, technical scheme and advantages of the embodiments of the present application, the present application will be further described below with reference to the drawings and embodiments, and a clear and complete description will be made. Obviously, the described embodiments are part of the embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application. In addition, the direction terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inner", "outer" and the like, are only the direction of the attached drawings, and the direction terms are used for better and clearer illustration and understanding of the present application, not indicating or implying the orientation which the present application must have, therefore cannot be understood as a limitation of the present application.

[0022] The embodiments of the present application, for example Figures 1 to 9The utility model discloses a simple and easy heel replacement mechanism, which is easy to operate and comprises a locking mechanism arranged on the bottom of a shoe sole and corresponding to the position of a heel, a fixed pin 1 arranged in a shoe heel 7 and capable of being locked with the locking mechanism, i.e., the locking mechanism is fixedly connected to the shoe sole, i.e., the midsole of the shoe, and corresponds to the position of the heel, the fixed pin 1 is a rigid pin, and the lower part of the fixed pin 1 is connected to the shoe heel 7, which can be fixedly connected or detachably connected, preferably detachably connected, and the detachable connection is preferably a threaded connection, so that only a threaded hole or a threaded column for threaded connection with the fixed pin 1 needs to be arranged in the shoe heel 7 of different heights, thereby avoiding the arrangement of the fixed pin 1 in each shoe heel 7 and saving materials, when in use, the fixed pin 1 and the locking mechanism are unlocked, the shoe heel 7 is replaced, then the fixed pin 1 is detached from the shoe heel 7, the fixed pin 1 is arranged on the shoe heel 7 to be replaced, and finally the fixed pin 1 and the locking mechanism are locked, thereby realizing the replacement of the heel, the upper part of the fixed pin 1 is provided with at least one axial locking groove 10 with an arc-shaped cross section, i.e., the axial locking groove 10 has an arc-shaped cross section, each axial locking groove 10 is circumferentially arranged around the outer wall of the fixed pin 1, and when a plurality of axial locking grooves 10 are arranged, the axial locking grooves 10 are arranged in parallel and spaced apart along the axial direction, and the plurality of axial locking grooves 10 can be matched and locked with shoe heels of different heights, the locking mechanism comprises an outer shell 2 arranged on the shoe sole and provided with a receiving cavity 20, an inner shell 3 movably arranged in the receiving cavity 20 and provided with a recess 30 at the top, a plurality of solid balls 4 movably arranged in the receiving cavity 20 below the inner shell 3 and capable of being abutted with the inner shell 3 and matched and locked with the axial locking groove 10, and compression springs 5 arranged in the recess 30 and connected to the top of the receiving cavity 20 and the bottom of the recess 30, i.e., the outer shell 2 is arranged on the midsole of the shoe, the receiving cavity 20 on the outer shell 2 is closed, the inner shell 3 is movably arranged in the receiving cavity 20, i.e., the distance between the bottom of the inner shell 3 and the bottom surface of the receiving cavity 20 changes with the movement of the inner shell 3, the solid balls 4 are arranged below the inner shell 3, the inner shell 3 moves upward to increase the distance between the inner shell 3 and the bottom surface of the receiving cavity 20, thereby increasing the movement space of the solid balls 4, the solid balls 4 can slide out of the axial locking groove 10, the inner shell 3 moves downward and abuts against the solid balls 4 to reduce the movement space of the solid balls 4 until the solid balls 4 are pushed back into the axial locking groove 10 and fixed, the compression springs 5 are compressed when the inner shell 3 moves upward, and then the inner shell 3 can move downward under the elastic force of the compression springs 5 to return to the initial state, the solid balls 4 are preferably steel balls, the matching and locking of the solid balls 4 and the axial locking groove 10 is that part of the solid balls 4 is arranged in the axial locking groove 10, after part of the solid balls 4 is arranged in the axial locking groove 10, the cavity wall of the receiving cavity 20 and the axial locking groove 10 limit the solid balls 4, so that the solid balls 4 cannot slide out of the groove to realize the locking, and preferably, more than half of the solid balls 4 is arranged in the axial locking groove 10, the solid balls 4 are surrounded to form a space,As two solid spheres 4 form a clamping structure, three solid spheres 4 form a hollow triangular structure, four form a hollow quadrilateral structure, etc., the cross section of the accommodating cavity 20 is in an inverted trapezoidal structure, which means that the accommodating cavity 20 is large at the top and small at the bottom. During the upward movement of the inner shell 3, the distance between the bottom and the cavity wall of the accommodating cavity 20 increases, which increases the vertical movement space of the solid spheres 4 and also increases the horizontal movement space of the solid spheres 4, thereby facilitating the sliding out of the axial locking groove 10 to achieve unlocking. When moving downward, the movement space of the solid spheres 4 is reduced, and the solid spheres 4 cannot be separated from the axial locking groove 10, which ensures the stability of the clamping structure. The shape of the inner shell 3 can match the shape of the accommodating cavity 20. The outer shell 2 is provided with a first through hole 200 at the bottom of the accommodating cavity 20, and the inner shell 3 is provided with a second through hole 300 coaxial with the first through hole 200 at the bottom of the groove 30. The hole centers of the first through hole 200 and the second through hole 300 are parallelly arranged and on the same axis, which facilitates the passage of the fixing pin 1. The hole diameter is slightly larger than the size of the fixing pin 1, which avoids the problem of the fixing pin 1 shaking in the hole due to the hole diameter being too large, and the problem of the fixing pin 1 being unable to be inserted due to the hole diameter being too small. The fixing pin 1 can pass through the first through hole 200, the space surrounded by the plurality of solid spheres 4, and the second through hole 300 in sequence from bottom to top and be inserted into the compression spring 5. In this way, the fixing pin 1 connects the inner shell 3, the outer shell 2, and the compression spring 5 in series, and the plurality of solid spheres 4 are arranged along the circumference of the outer wall of the fixing pin 1, which can smoothly engage with the axial locking groove 10. The inner shell 3 is further provided with an adjusting rod 6 that can pass through the outer shell 2 and be exposed outside the sole and can move relative to the outer shell 2. The two ends of the adjusting rod 6, one end being connected to the inner shell 3 and the other end being exposed outside the sole, mean that the outer shell 2 is provided with a through hole for the adjusting rod 6 to pass through. The through hole is a long hole that has a movement space for the adjusting rod 6. The movement of the adjusting rod 6 relative to the outer shell 2 avoids the outer shell 2 hindering the movement of the adjusting rod 6. The outer end of the adjusting rod 6 facilitates the adjustment of its position, thereby adjusting the upward and downward movement of the inner shell 3 to achieve unlocking or locking. The inner end is connected to the inner wall or the outer wall of the inner shell 3 according to different situations, and is preferably connected to the outer wall. At this time, the inner end can be set as a circular ring and then be sleeved on the outer wall of the inner shell 3, so that the force applied to the inner shell 3 during the movement of the inner shell 3 is evenly distributed, ensuring smooth movement. The inner end and the outer end form an L-shaped structure, that is, the adjusting rod 6 forms an L-shaped structure. According to different needs, the outer end can be set upward or downward, and then the lifting of the inner shell 3 is adjusted by moving the adjusting rod 6 up and down. Of course, a sliding groove can also be provided on the outer wall of the inner shell 3 and extend upward along the circumference of the inner shell 3. Then the inner end of the adjusting rod 6 is slidably arranged in the sliding groove. At this time, the outer end of the adjusting rod 6 can be set to rotate horizontally, thereby adjusting the lifting of the inner shell 3.First, the fixing pin 1 is installed on the heel 7, becoming an integral part of the heel 7. The locking mechanism is installed on the midsole of the shoe, becoming an integral part of the sole. Then, the fixing pin 1 passes through the lower part of the outer shell 2, sequentially through the first through hole 200, into the space formed by multiple solid spheres 4, and into the second through hole 300. The fixing pin 1 continues to be inserted upwards, and the movable solid spheres 4 are locked in the axial locking groove 10. Under the elastic force of the compression spring 5, the inner shell 3 vertically limits the solid spheres 4 within the accommodating cavity 20. Horizontally, the cavity wall of the accommodating cavity 20 restricts the horizontal movement of the solid spheres 4, thus fixing the position of the solid spheres 4. In this way, the solid spheres 4 are limited in the axial locking groove 10. In the fixed groove 10, the solid ball 4 cannot move, and the fixing pin 1 cannot move up and down to achieve locking, thus connecting the sole and the heel 7 together. When the fixing pin 1 is pulled down, the solid ball 4 is subjected to downward and horizontal forces, but since its position is fixed, neither of these forces can cause it to move, thus locking the fixing pin 1 and the locking mechanism. The installation of the fixing pin 1 in the heel 7 does not require a complex structure, maintaining the stability of the heel structure and ensuring durability. When the heel needs to be replaced, the inner shell 3 is adjusted upward by adjusting the adjusting rod 6, which in turn adjusts the movement space of the solid ball 4. The solid ball 4 can then disengage from the locking groove 10, thus unlocking the locking mechanism. This structure is simple. The fixing pin 1 is installed on the heel 7, and the locking mechanism is installed on the midsole of the shoe corresponding to the heel position. The two are locked together by the engagement between the movable solid ball 4 and the axial locking groove 10. No complex structure is needed in the heel 7, simplifying the design, maintaining the stability of the heel structure, and ensuring durability. When the heel needs to be replaced, it is adjusted by the adjusting rod 6, which protrudes from the outer shell 2 and is exposed outside the sole. The solid ball 4 slides out of the axial locking groove 10 to unlock the heel. It is convenient to operate and easy to use, allowing for heel replacement without the need for external tools.

[0023] Further improvements, such as Figures 1 to 5As shown, the inner shell 3 and the outer shell 2 have the same shape, which means that the sizes of the inner bottom surfaces of the inner shell 3 and the outer shell 2 are matched. Their identical shapes prevent the distance between the inner shell 3 and the cavity wall of the accommodating cavity 20 from increasing when the inner shell 3 moves upward, thus avoiding the solid sphere 4 falling out between them. The side wall of the inner shell 3 is provided with multiple inner shell through holes 31 corresponding to the multiple solid spheres 4, connecting the accommodating cavity 20 and the groove 30. The solid sphere 4 passes through the inner shell through holes 31 in the accommodating cavity 20. The inner shell 3 moves within the groove 30, and the groove wall of the groove 30 extends radially inward with an extension arm 301 located above the solid sphere 4. The lower end of the compression spring 5 presses against the extension arm 301. The inner shell 3 moves downward so that its bottom surface can abut against the inner bottom surface of the outer shell 2. After the two abut against each other, the solid sphere 4 is completely confined within the inner shell 3. When locked in use, the fixing pin 1 is inserted between multiple solid spheres 4, which will apply an upward and horizontal force to the solid spheres 4, and in turn apply an upward force to the inner shell 3. The compression spring 5 is compressed, and simultaneously a downward force is applied to the solid sphere 4. The solid sphere 4 moves horizontally due to the horizontal force acting on it. When the inner shell 3 is not moving upwards, the space for the solid sphere 4 to move horizontally is limited by the cavity wall of the accommodating cavity 20 and the axial locking groove 10, preventing it from moving. As the fixing pin 1 continues to be inserted upwards, the inner shell 3 also moves upwards, expanding the space for the solid sphere 4 to move horizontally. The solid sphere 4 moves outwards from the inner shell 3, and the fixing pin 1 moves downwards... When pulled, the solid ball 4 has less space to move outward from the inner shell 3. When it aligns with the axial locking groove 10, it slides into the axial locking groove 10 and engages with the fixing pin 1, thus locking the two together. During unlocking, the inner shell 3 moves upward by adjusting the adjusting rod 6, increasing the horizontal movement space of the solid ball 4, allowing it to slide out of the inner shell 3 and disengage from the axial locking groove 10. This causes the fixing pin 1 to disengage from the locking mechanism, unlocking the shoe and allowing for easy and quick replacement of the heel. To prevent damage to the inner shell 3 during horizontal movement of the solid ball 4, a second slit 32 along the axial direction is provided on the side wall of the inner shell 3. The second slit 32 is positioned above any one of the inner shell through holes 31, buffering the radial force on the inner shell 3 and ensuring the structural integrity of the inner shell 3. After the solid sphere 4 is subjected to the force of the fixing pin 1, the solid sphere 4 moves. After the solid sphere 4 touches the extension arm 301, it applies a force to the extension arm 301, that is, to the inner shell 3. The inner shell 3 moves and applies a force to the compression spring 5, forming a force transmission process. The distance from the bottom of the extension arm 301 to the inner bottom surface of the inner shell 3 matches the diameter of the solid sphere 4. That is, there is a gap between the bottom of the extension arm 301 and the top of the solid sphere 4, which ensures that the solid sphere 4 can smoothly engage or disengage from the axial locking groove 10. The distance from the bottom of the extension arm 301 to the inner bottom surface of the inner shell 3 is greater than the diameter of the solid sphere 4.Preferably, three solid spheres 4 are provided, forming a stable triangular structure to ensure a secure lock. Three extension arms 301 are provided and are equally spaced along the circumference of the inner shell 3, with the distance between them being less than the diameter of the solid spheres 4. This confines the solid spheres 4 to the inner bottom surface of the extension arms 301, preventing them from falling out of the gaps between the extension arms 301.

[0024] Further improvements, such as Figure 1 , Figure 3 and Figure 4 As shown, the inner shell 3 has a first slit 302 at the bottom of the groove 30 corresponding to the inner shell through hole 31, which is connected to the second through hole 200. The first slit 302 is provided with one or multiple slits at equal intervals along the circumference of the inner shell 3. The slits can be used to buffer the force on the bottom of the groove 30, so as to maintain the stability and durability of the inner shell 3 structure.

[0025] Further improvements, such as Figure 8 and Figure 9 As shown, it also includes a heel 7, the top of which is provided with a heel groove 70 into which a matching locking mechanism is inserted. The fixing pin 1 is vertically installed at the bottom of the groove 70, so that the fixing pin 1 and the heel 7 can be combined together for easy use and to prevent the fixing pin 1 from being lost. When in use, the locking mechanism is installed on the sole of the shoe, and then inserted into the heel groove 70 to lock with the fixing pin 1. The heels 7 are set to heels of different heights, and they can all be carried with them for easy replacement. It also includes a mounting block 8 installed at the heel of the shoe sole. The mounting block 8 increases the contact area with the sole, reduces the pressure on the locking mechanism during use, and maintains the structural integrity. The mounting block 8 is designed with a shape similar to that of the heel, which can provide good support for the heel. The side wall of the outer shell 2 is provided with a step 21 that is away from the axis of the accommodating cavity 20 around its side wall. The top of the mounting block 8 is provided with a mounting block through hole 80 with a T-shaped cross-section for mounting the outer shell 2. The outer shell 2 passes through the mounting block through hole 80 and is installed on the mounting block 8, with the bottom of the step 21 pressing against the hole wall of the mounting block through hole 80. In this way, the structure of the outer shell 2 is similar to that of the mounting block through hole 80, which facilitates the installation of the outer shell 2. After installation, the step 21 of the outer shell 2 presses against the horizontal side wall of the upper part of the mounting block through hole 80, making the installation structure firm and stable, thus preventing the outer shell 2 from falling off.

[0026] Further improvements, such as Figure 7As shown, the end of the adjusting rod 6 furthest from the inner shell 3 is connected to an adjusting button 9 for mounting on the sole or heel. That is, the adjusting button 9 is located on the outer end of the adjusting rod 6 for easy adjustment. Preferably, the side wall of the heel 7 has a heel groove 71 in the vertical direction. The adjusting button 9 slides within the heel groove 71, moving up and down within it. This movement of the adjusting button 9 drives the movement of the adjusting rod 6, thereby causing the inner shell 3 to move up and down. To prevent accidental activation of the adjusting button 9 by external debris during normal wear, the heel groove 71 is located on the front surface of the heel 7, near the toe. The top of the adjusting button 9 has an adjusting button groove 90. The end of rod 6 slides within the adjusting knob groove 90. The adjusting knob groove 90 is located at the top of the adjusting knob 9, meaning it is horizontal. The outer end of the adjusting rod 6 also slides within the adjusting knob groove 90. When the adjusting knob 9 rises, it pushes the adjusting rod 6 to slide. At this point, the adjusting rod 6 slides at an angle within the adjusting knob groove 90, facilitating its sliding and preventing the problem that, when the adjusting knob 9 slides upwards, the force applied to the adjusting rod 6 is also upwards, resulting in no horizontal force and preventing it from sliding. Figure 8 and Figure 9 As shown, the top of the heel 7 is provided with a heel through hole 72 at the position corresponding to the adjustment button slide groove 90, which is connected to the heel slide groove 71. The adjustment rod 6 passes through the heel through hole 72 and is inserted into the adjustment button slide groove 90 to slide and connect with the adjustment button 9. At this time, the heel through hole 72 is through which the adjustment rod 6 passes, and it is set to the same state as the tilt angle of the adjustment rod 6, so as to facilitate the up and down movement of the adjustment rod 6.

[0027] Further improvements, such as Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the outer shell 2 includes a bottom shell 22 and a top shell 23 that cover and connect to form an accommodating cavity 20. The first through hole 200 is located at the bottom of the bottom shell 22. The upper end of the compression spring 5 is connected to the bottom surface of the top shell 23, which facilitates the installation of the inner shell 3 and the various components located in the groove 30 of the inner shell 3. After being installed on the heel 7, multiple stress points are formed, such as the top of the heel and the top of the top shell, which maintains sufficient structural strength and extends service life.

[0028] 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. An easy to operate simple heel changing mechanism characterized in that: The application relates to a locking mechanism for mounting on the bottom of a shoe sole corresponding to the position of a heel, a fixing pin for mounting in the heel, and an upper part of the fixing pin being lockable with the locking mechanism; the upper part of the fixing pin is provided with at least one axial locking groove with an arc-shaped cross section; the locking mechanism comprises a shell provided with a containing cavity for mounting on the inside of the shoe sole, an inner shell movably arranged in the containing cavity and provided with a recess on the top, a plurality of solid spherical balls movably arranged in the containing cavity below the inner shell and capable of being matched and clamped with the axial locking groove, and two compression springs arranged in the recess and corresponding to the top of the containing cavity and the bottom of the recess; the cross section of the containing cavity is in an inverted trapezoidal structure; the shell is provided with a first through hole at the bottom of the containing cavity; the inner shell is provided with a second through hole coaxial with the first through hole at the bottom of the recess; the fixing pin can be inserted into the compression spring from bottom to top through the first through hole, a space surrounded by the plurality of solid spherical balls and the second through hole; the inner shell is further provided with an adjusting rod capable of being exposed outside the shell and capable of being moved relative to the shell; the top of the heel is provided with a heel recess matched with the locking mechanism; the fixing pin is vertically mounted on the bottom of the heel recess; the end of the adjusting rod away from the inner shell is connected with an adjusting knob for mounting on the shoe sole or the heel; the sidewall of the heel is provided with a heel sliding groove in the vertical direction; the adjusting knob is slidably arranged in the heel sliding groove; the top of the adjusting knob is provided with an adjusting knob sliding groove; the end of the adjusting rod is slidably arranged in the adjusting knob sliding groove; the top of the heel is provided with a heel through hole in communication with the heel sliding groove at the position corresponding to the adjusting knob sliding groove; the adjusting rod passes through the heel through hole and is connected with the adjusting knob in sliding mode; the shell comprises a shell bottom and a shell upper cover which are connected to form the containing cavity; the first through hole is arranged at the bottom of the shell bottom; the upper end of the compression spring is connected to the bottom surface of the shell upper cover.

2. The easy-to-operate simple heel replacement mechanism according to claim 1, characterized in that The shapes of the inner shell and the outer shell are the same; the sidewall of the inner shell is provided with a plurality of inner shell through holes corresponding to the plurality of solid spherical balls and in communication with the containing cavity and the recess; the solid spherical balls are movably arranged in the containing cavity and the recess through the inner shell through holes; the groove wall of the recess extends radially inwardly and has an extension arm above the solid spherical ball; the lower end of the compression spring abuts against the extension arm.

3. The easy-to-operate simple heel replacement mechanism according to claim 2, characterized in that The inner shell is provided with a first slit in communication with the second through hole at the position corresponding to the inner shell through hole at the bottom of the recess; the first slit is arranged along the circumferential direction of the inner shell and has one or a plurality of equal intervals.

4. The easy-to-operate simple heel-replacing mechanism according to claim 2, characterized in that The solid spherical ball is provided with three extension arms which are arranged along the circumferential direction of the recess at equal intervals and have a spacing distance smaller than the diameter of the solid spherical ball.

5. The easy-to-operate simple heel-replacing mechanism according to claim 2, characterized in that The sidewall of the inner shell is provided with a second slit along the axial direction of the inner shell; the second slit is arranged above any one of the inner shell through holes.

6. The easy-to-operate simple heel-replacing mechanism according to claim 1, characterized in that It also comprises a mounting block installed at the heel of the shoe sole, a step is arranged on the side wall of the shell around the side wall of the shell away from the axis of the accommodating cavity, the top of the mounting block is provided with a mounting block through hole with T-shaped cross section, and the shell is installed on the mounting block through the mounting block through hole and the bottom of the step is pressed on the hole wall of the mounting block through hole.

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