Waist iron capable of changing curvature, sole for heel-changing shoes, and heel-changing shoes

Abstract

The present invention relates to a heel iron capable of changing its curvature, a sole for heel-changing shoes, and a heel-changing shoe. The heel iron comprises a front section, a middle section, and a rear section of the heel iron, arranged sequentially from front to rear. The middle section of the heel iron is curved, and the two ends of the middle section are movably connected to the upper surfaces of the front and rear sections of the heel iron. A sliding member is slidably provided on the bottom surface of the middle section of the heel iron. The sliding member is an arc-shaped slider having the same curvature as the middle section of the heel iron and a length not less than that of the middle section of the heel iron. A locking mechanism is provided on the bottom surface of the sliding member. Also disclosed are a sole for heel-changing shoes and a heel-changing shoe using the heel iron. The invention can conveniently change the curvature of the heel iron according to the height of the heel, providing better wearing stability and comfort.

Description

Technical Field

[0001] The invention relates to the field of shoemaking, in particular to a waist iron capable of changing the curvature, a sole for a heel-changing shoe and a heel-changing shoe. Background Art

[0002] The shank, commonly known as the "lumbar iron," is an essential component of certain types of leather shoes, such as mid- and high-heeled shoes. It serves as the shoe's backbone, installed between the outsole and midsole, or sandwiched between the insole and the midsole, at the arch of the foot. It maintains the shoe's curvature and stabilizes the heel. The shank, a large beam connecting the heel and forefoot, is the shoe's "backbone" and one of its primary load-bearing components. In existing high-heeled shoes, the shank's curvature is fixed; a corresponding heel height is matched to maintain stability and comfort. Especially for the currently available interchangeable heel shoes, the interchangeable heels are designed to meet the wearing needs of women in different occasions. However, the curvature of the waist iron in the existing interchangeable heel shoes is fixed and is only adapted to a certain height of heels. After the heel is replaced, the force point of the foot will change. Since the waist iron is installed inside the sole, the curvature of the waist iron cannot be changed as the heel height is changed, and the support point of the waist iron will not change, resulting in discomfort and instability when wearing the leather shoes. Summary of the Invention

[0003] In view of the existing deficiencies, the present invention provides a waist iron capable of changing the curvature, a sole for heel-changing shoes and a heel-changing shoe.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a waist iron with variable curvature, comprising a waist iron front section, a waist iron middle section and a waist iron rear section arranged in sequence from front to back, the waist iron middle section forming an arc-shaped structure, and the two ends of the waist iron middle section correspondingly and movably overlapping the upper surfaces of the waist iron front section and the waist iron rear section; a sliding member is slidably provided on the bottom surface of the waist iron middle section, the sliding member is an arc-shaped slider having the same curvature as the waist iron middle section and a length not less than that of the waist iron middle section, and a lock mechanism is provided on the bottom surface of the sliding member; The bottom surface of the middle section of the waist iron is provided with a first slide groove running through the front and rear ends of the middle section of the waist iron, the bottom surface of the front section of the waist iron is provided with a second slide groove in the front-to-back direction, and the bottom surface of the rear section of the waist iron is provided with a third slide groove in the front-to-back direction; the second slide groove and the third slide groove are both connected to the first slide groove, the middle part of the sliding member is located in the first slide groove and its front and tail are correspondingly located in the second slide groove and the third slide groove; the lock and mechanism include a connecting column fixedly provided on the bottom surface of the sliding member, and a lock and member pivotally connected to the end of the connecting column away from the sliding member.

[0005] Preferably, the bottom surface of the waist iron middle section is provided with a downward first step surface corresponding to the front and rear ends of the first slide groove; the rear part of the top surface of the waist iron front section is provided with an upward second step surface, and the front part of the top surface of the waist iron rear section is provided with an upward third step surface; the first step surfaces at the front and rear ends of the waist iron middle section are correspondingly overlapped on the second step surface and the third step surface, the length of the first step surface at the front end of the waist iron middle section is less than the length of the second step surface, and the length of the first step surface at the rear end of the waist iron middle section is less than the length of the third step surface.

[0006] Preferably, the front section of the waist iron is provided with a first stopper in the second chute, and the rear section of the waist iron is provided with a second stopper in the third chute.

[0007] Preferably, the first chute, the second chute and the third chute are chute with the same width arranged in parallel.

[0008] Preferably, the front end of the waist iron front section is an upwardly curved structure.

[0009] Preferably, the lengths of the front section and the rear section of the waist iron are not greater than the length of the middle section of the waist iron.

[0010] A sole for a shoe with a changeable heel, the sole comprising a waist iron capable of changing the curvature as described in any of the preceding items, the bottom surface of the sole being provided with a sole through hole into which a locking mechanism is inserted and moves, and the sole being provided with a locking fitting capable of locking with the locking mechanism.

[0011] A heel-changing shoe comprises the above-mentioned sole for heel-changing shoes.

[0012] The beneficial effects of the present invention are as follows: the waist iron of the invention adopts a multi-section split and overlapped structure, and a sliding part is provided on it. After the heel height is changed, the support point of the waist iron is changed by sliding the sliding part, forming a stable support and improving the wearing comfort. The position of the sliding part is locked by the buckle on the sole, thereby ensuring that the waist iron can remain in a stable state after the curvature of the waist iron is changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of a waist iron according to an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the bottom structure of the waist iron after decomposition according to an embodiment of the present invention;

[0015] Figure 3 A schematic structural diagram of a heel-changing shoe according to an embodiment of the present invention;

[0016] Figure 4 This is an embodiment of the present invention Figure 3 Schematic diagram of the enlarged structure of A in the middle;

[0017] Names and serial numbers of parts in the figure: 1-front section of waist iron 10-second slide 11-second step surface 12-first stopper 2-middle section of waist iron 20-first slide 21-first step surface 3-rear section of waist iron 30-third slide 31-third step surface 32-second stopper 4-sliding part 5-locking part 50-connecting column 6-sole 60-sole through hole 61-locking and matching part 7-heel-changing shoe. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with embodiment, and is described clearly and completely, and it should be understood that these embodiments are for illustrating the present invention and are not limited to the scope of limiting the present invention. The implementation conditions adopted in the embodiment can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not indicated are generally the conditions in routine experiments. In addition, the directional terms mentioned in the present invention, for example, "up", "down", "front", "back", "left", "right", "inside", "outside" etc., are only with reference to the directions of the attached diagrams, and the directional terms used are in order to better and more clearly illustrate and understand the present invention, rather than to indicate or allude to the orientation that the present invention must have, and therefore can not be construed as limitations of the present invention.

[0019] The present invention is implemented as follows Figure 1 and Figure 2As shown in the figure, a waist iron capable of changing the curvature includes a waist iron front section 1, a waist iron middle section 2 and a waist iron rear section 3 arranged in sequence from front to back. The front-to-back direction corresponds to the direction from the toe to the heel. The three parts are all made of cold-rolled steel bars. The waist iron middle section 2 is an arc-shaped structure, and the waist iron front section 1 and the waist iron rear section 3 are a straight structure. At the same time, the front end of the waist iron front section 1 is set to an upward curved structure, so that when it is installed in the sole, the installation structure is more stable and prevents it from loosening in the sole. In addition, the lengths of the waist iron front section 1 and the waist iron rear section 3 are not greater than the length of the waist iron middle section 2. In this way, it can be ensured that the sole has a sufficient curvature after the waist iron is installed in the sole, and the sliding member 4 can slide better to adjust The curvature of the waist iron, the two ends of the waist iron middle section 2 are movably overlapped on the upper surfaces of the waist iron front section 1 and the waist iron rear section 3, that is, the front end of the waist iron middle section 2 is overlapped on the rear part of the waist iron front section 1, and the rear end of the waist iron middle section 2 is overlapped on the front part of the waist iron rear section 3. At the same time, the waist iron middle section 2 and the waist iron front section 1 and the waist iron rear section 3 are not fixed at the overlap and can be relatively movable. That is to say, when the front part of the waist iron middle section 2 is subjected to a downward force, the waist iron middle section 2 will press the rear part of the waist iron front section 1 downward, and the rear part of the waist iron front section 1 will form an angle with the surface where the waist iron middle section 2 overlaps; similarly, when the rear part of the waist iron middle section 2 is subjected to a downward force, the waist iron middle section 2 will press the front part of the waist iron rear section 3 downward. The front part of the waist iron rear section 3 forms an angle with the surface of the waist iron middle section 2 overlapping, thereby changing the force point of the entire waist iron; a sliding member 4 is slidably provided on the bottom surface of the waist iron middle section 2. The sliding member 4 is an arc-shaped slider with the same curvature as the waist iron middle section 2 and a length not less than the length of the waist iron middle section 2. That is to say, part of the front part of the sliding member 4 slides on the bottom surface of the waist iron front section 1, and part of the rear part of the sliding member 4 slides on the bottom surface of the waist iron rear section 3. At the same time, the length of the sliding member 4 is less than the sum of the lengths of the three waist iron sections. When the sliding member 4 slides forward, the vertex of its arc moves forward, and the vertex of the arc of the sliding member 4 and the waist iron middle section 2 are staggered with each other, so that the arc formed by the entire waist iron The apex of the arc moves forward, thereby changing the curvature of the entire waist iron, and at the same time providing support for the front section 1 of the waist iron that is pressed downward. The force point moves forward to adapt to the needs of high heels, and the part formed by the rear part of the middle section 2 of the waist iron and the rear section 3 of the waist iron is easy to change in the direction of increasing the inclination; the slider 4 slides backward, and the apex of its arc moves backward. The apex of the arc of the slider 4 and the middle section 2 of the waist iron are staggered with each other. The apex of the arc formed by the entire waist iron moves backward, and the force point moves backward to meet the needs of low heels. A lock and mechanism is provided on the bottom surface of the slider 4. The lock and mechanism is used to help the user hold and push the slider 4 to slide on the one hand, and to lock the position of the slider 4 after sliding on the other hand.As for the lock and mechanism, the lock and mechanism includes a connecting column 50 fixedly arranged on the bottom surface of the sliding member 4, a lock and member 5 pivotally connected to the end of the connecting column 50 away from the sliding member 4, and the connecting column 50 is perpendicular to the bottom surface of the sliding member 4. If the lock and member 5 is a buckle, the buckle is an open annular structure, and the connecting column 50 is provided with through holes at both ends of its radial direction. Then, the two ends of the buckle opening are correspondingly installed in the through holes of the connecting column 50, so that the buckle is flipped up and down relative to the connecting column 50; at the same time, it can also be turned up and down when the connecting column 50 is away from the sliding member 4. The outer wall of one end of the sliding member 4 is provided with a connecting column groove or a connecting column protrusion which surrounds the connecting column 50, and then an end cover is provided at the end to be sleeved on the outer wall of the connecting column 50, and an end cover protrusion or an end cover groove which slides in matching with the connecting column groove or the connecting column protrusion is provided on the inner wall of the end cover. The end cover is also provided with through holes at both radial ends, and finally the two ends of the buckle opening are correspondingly installed in the through holes of the end cover, so that the buckle can rotate around the connecting column 50 in the horizontal plane and can be flipped up and down relative to the connecting column 50 to meet different usage requirements.

[0020] In practical applications, such as Figure 3 and Figure 4As shown in the figure, the above-mentioned waist iron capable of changing the curvature is installed in the sole 6 to form a sole for changing heel shoes. At this time, a sole through hole 60 is provided on the bottom surface of the sole 6, in which a lock and mechanism is inserted and moved. That is, the waist iron front section 1, the waist iron middle section 2 and the waist iron rear section 3 are installed between the outsole and the midsole of the shoe according to the front-to-back direction of the sole 6. At the same time, the slider 4 is also installed between the outsole and the midsole of the shoe and can slide therein. The sole through hole 60 is provided on the outsole of the shoe, and the lock and mechanism on the slider 4 is inserted into the sole through hole 60 or passes through the sole through hole 60. At the same time, the lock and mechanism can also move back and forth in the sole through hole 60 to promote the sliding of the slider 4. The sole 6 is provided with a lock and matching member 61 that can cooperate with the lock and mechanism to lock. When the locking member 5 is a buckle, a locking and fitting member 61 that can lock with the buckle is provided on the hole wall of the sole through hole 60 or the bottom surface of the sole 6. The locking and fitting member 61 is used to lock with the buckle to fix the position of the sliding member 4 after sliding. Multiple locking and fitting members 61 can be arranged at intervals to meet the positioning requirements of the sliding member 4 after different sliding distances. When the lock and member 5 has not passed through the sole through hole 60, the lock and matching member 61 is set on the hole wall of the sole through hole 60 to engage with the buckle in the sole through hole 60. When the lock and member 5 passes through the sole through hole 60, the lock and matching member 61 is set on the bottom surface of the sole 6 and around the sole through hole 60 to engage with the buckle outside the sole through hole 60. At this time, the structure of the lock and matching member 61 is like two sole protrusions forming a groove on the bottom surface of the sole 6, and then an elastically deformable groove protrusion is set at a position near the open end of the groove wall of the groove. When the buckle is inserted into the groove, the groove protrusion is first squeezed to cause it to deform, and the buckle is inserted into the groove, and the groove protrusion returns to its initial state, thereby limiting the buckle in the groove, ensuring that the position of the slider 4 can be stable after sliding.

[0021] A heel-changing shoe, such as Figure 3 and Figure 4 As shown in the figure, the heel-changing shoes 7 include the sole 6 for heel-changing shoes as described above. When changing the heels, the curvature of the waist iron is changed by adjusting the sliding of the slider 4, thereby changing the force point of the waist iron to meet the use requirements of heels of different heights.

[0022] Further improvements, such as Figure 2As shown in, the bottom surface of the waist iron middle section 2 is provided with a first slide groove 20 that passes through the front and rear ends of the waist iron middle section 2, the bottom surface of the waist iron front section 1 is provided with a second slide groove 10 in the front-to-back direction, and the bottom surface of the waist iron rear section 3 is provided with a third slide groove 30 in the front-to-back direction; the second slide groove 10 and the third slide groove 30 are both connected with the first slide groove 20, and the middle part of the slider 4 is located in the first slide groove 20 and its front and tail are correspondingly located in the second slide groove 10 and the third slide groove 30, that is, the second slide groove 10, the first slide groove 20 and the third slide groove 30 are connected in sequence from front to back, and the slider 4 slides forward in the first slide groove 20, the front part of the slider 4 slides forward in the second slide groove 10, and the rear part of the slider 4 slides forward in the third slide groove 30, which ensures the sliding direction and smoothness of the slider 4, and avoids the influence of the sole on the sliding of the slider 4 when the waist iron is installed on the sole. The first, second, and third chutes 20, 10, and 30 are arranged in parallel and have the same width, facilitating the sliding of the slider 4. Furthermore, to limit the sliding of the slider 4 and prevent it from slipping out of the second or third chutes 10, 30, the front section 1 of the waist iron is provided with a first stopper 12 within the second chutes 10, and the rear section 3 of the waist iron is provided with a second stopper 32 within the third chutes 30. These stops prevent the slider 4 from sliding forward or backward, ensuring that it remains in the chutes and does not affect the stability of the waist iron structure. As for the overlap between the waist iron middle section 2 and the waist iron front section 1 and the waist iron rear section 3, the bottom surface of the waist iron middle section 2 is provided with a downward first step surface 21 corresponding to the front and rear ends of the first chute 20, that is, the front end of the bottom of the waist iron middle section 2 is provided with a first step surface 21, and the rear end of the bottom surface is also provided with a first step surface 21; the rear part of the top surface of the waist iron front section 1 is provided with an upward second step surface 11, and the front part of the top surface of the waist iron rear section 3 is provided with an upward third step surface 31; the first step surfaces 21 at the front and rear ends of the waist iron middle section 2 correspond to The first step surface 21 at the front end of the waist iron middle section 2 overlaps the second step surface 11, and the first step surface 21 at the rear end of the waist iron middle section 2 overlaps the third step surface 31. The length of the first step surface 21 at the front end of the waist iron middle section 2 is less than the length of the second step surface 11, and the length of the first step surface 21 at the rear end of the waist iron middle section 2 is less than the length of the third step surface 31. In this way, when the first step surface 21 overlaps the second step surface 11 and the third step surface 31, as shown in FIG. Figure 1 As shown in the figure, there is a gap between the front end of the second step surface 11 and the front end of the first step surface 21 of the front end of the waist iron middle section 2, and there is a gap between the rear end of the third step surface 31 and the rear end of the first step surface 21 of the rear end of the waist iron middle section 2. This makes it easier for the waist iron front section 1 and the waist iron rear section 3 to have room to move relative to the waist iron middle section 2 after being subjected to force, thereby realizing the change of the waist iron curvature after the sliding member 4 slides.

[0023] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made based on the present invention. Therefore, such modifications and improvements, which do not depart from the spirit of the present invention, are intended to fall within the scope of protection claimed herein.

Claims

1. A waist iron capable of changing the curvature, characterized in that : It includes a waist iron front section, a waist iron middle section and a waist iron rear section arranged in sequence from front to back, the waist iron middle section is an arc structure, and the two ends of the waist iron middle section are movably overlapped on the upper surfaces of the waist iron front section and the waist iron rear section; a sliding member is slidably provided on the bottom surface of the waist iron middle section, and the sliding member is an arc-shaped slider with the same curvature as the waist iron middle section and a length not less than the length of the waist iron middle section, and the bottom surface of the sliding member is provided with a lock and mechanism; the bottom surface of the waist iron middle section is provided with a first slide groove passing through the front and rear ends of the waist iron middle section, the bottom surface of the waist iron front section is provided with a second slide groove in the front-to-back direction, and the bottom surface of the waist iron rear section is provided with a third slide groove in the front-to-back direction; the second slide groove and the third slide groove are both connected to the first slide groove, the middle part of the sliding member is located in the first slide groove and its front and tail are correspondingly located in the second slide groove and the third slide groove; the lock and mechanism includes a connecting column fixedly arranged on the bottom surface of the sliding member, and a lock and member pivotally connected to the connecting column at one end away from the sliding member.

2. The waist iron capable of changing the curvature according to claim 1, characterized in that The bottom surface of the waist iron middle section is provided with a downward first step surface corresponding to the front and rear ends of the first chute; the rear part of the top surface of the waist iron front section is provided with an upward second step surface, and the front part of the top surface of the waist iron rear section is provided with an upward third step surface; the first step surfaces at the front and rear ends of the waist iron middle section are correspondingly overlapped on the second step surface and the third step surface, the length of the first step surface at the front end of the waist iron middle section is shorter than the length of the second step surface, and the length of the first step surface at the rear end of the waist iron middle section is shorter than the length of the third step surface.

3. The waist iron capable of changing the curvature according to claim 1, characterized in that : The front section of the waist iron is provided with a first stopper in the second chute, and the rear section of the waist iron is provided with a second stopper in the third chute.

4. The waist iron capable of changing the curvature according to claim 1, characterized in that : The first chute, the second chute and the third chute are chute with the same width arranged in parallel.

5. The waist iron capable of changing the curvature according to claim 1, characterized in that The front end of the waist iron front section is an upwardly curved structure.

6. The waist iron capable of changing the curvature according to claim 1, characterized in that : The lengths of the front section and the rear section of the waist iron are not greater than the length of the middle section of the waist iron.

7. A sole for heel-changing shoes, characterized in that :The sole includes the waist iron capable of changing the curvature as described in any one of claims 1 to 6, the bottom surface of the sole is provided with a sole through hole in which a lock and mechanism is inserted and movable, and the sole is provided with a lock and matching piece that can be locked with the lock and mechanism.

8. A heel-changing shoe, characterized in that :The heel-changing shoes include the sole for heel-changing shoes described in claim 7.

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