Shoe, sole and retractable pulley device

Abstract

The utility model relates to a shoe technology field, concretely relates to a shoe, sole and collection and expansion formula pulley device. Including the shell seat of bottom opening, collection and expansion arm and install pulley assembly on the free end of collection and expansion arm, the connecting end of collection and expansion arm is rotatoryly installed in the inside of shell seat through the pin shaft that is arranged on the pin shaft seat, the collection and expansion arm is connected with the locking piece for keeping the locking piece in the folding state and the unfolded state, relative motion between locking piece and collection and expansion arm realizes locking or unlocking of both, the inside of shell seat is equipped with the support, the support has the inclined support surface that is matched with the collection and expansion arm in the unfolded state. The utility model is matched with the inclined support surface in the inside of shell seat in the unfolded state, and the locking piece keeps the locking stable of unfolded state together, effectively disperses the ground reaction force to the shell seat and sole simultaneously, reduces the negative effect to the collection and expansion arm and its junction and locking structure.

Description

Technical Field

[0001] This utility model relates to the field of footwear technology, specifically to a shoe, a shoe sole, and a retractable pulley device. Background Technology

[0002] Roller skates are unique athletic shoes with one or more wheels on the sole, allowing the wearer to skate on the ground with just a few simple steps. Public document (TW499989U) discloses an improved wheel positioning structure for a dual-purpose roller skate. It features a receiving groove on the bottom of the sole, with a rigid sole plate locked in place at the top of the groove using fasteners. A support is then fixed to the rigid sole plate using fasteners. The design incorporates a rotating mounting frame and two pulleys located on the frame. The frame and its pulleys can rotate and retract into the receiving groove or rotate and protrude from the sole, achieving dual-purpose functionality. However, in the extended state, when the frame and its pulleys bear the reaction force from the ground, the force is transmitted to the rotating connection and held in place only by a locking clip, which can easily cause damage to the clip and the rotating connection structure. Utility Model Content

[0003] The purpose of this invention is to provide a shoe, shoe sole, and retractable pulley device that can disperse ground reaction force and reduce the negative effects on the retractable arm, its connection, and the locking structure.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A retractable pulley device includes a housing with an open bottom, a retractable arm, and a pulley assembly mounted on the free end of the retractable arm. The connecting end of the retractable arm is rotatably mounted inside the housing via a pin passing through a pin seat. The retractable arm is connected to a locking member for maintaining the retractable arm in a retracted and extended state. The locking member and the retractable arm move relative to each other to lock or unlock them. The housing contains a support body with an inclined support surface that abuts against the retractable arm in the extended state.

[0005] Preferably, the retractable pulley device further includes a cover, which is detachably fitted at the bottom opening of the housing.

[0006] Preferably, the inclined support surface and the retractable arm are further provided with mutually cooperating protrusions and grooves.

[0007] Preferably, the pulley assembly is a single wheel or a double wheel.

[0008] Preferably, a torsion spring is provided on the pin at the corresponding position of the connecting end of the retractable arm. One torsion arm of the torsion spring abuts against the inner wall of the mounting blind hole, while the other torsion arm is inserted into the top wall of the housing.

[0009] Preferably, the head end of the pin is exposed outside the housing, while the end of the pin is located inside the housing. The pin only undergoes axial displacement relative to the housing. The locking member is fixedly installed at the end of the pin. The locking member has a locking block facing the connecting end of the retractable arm. The connecting end of the retractable arm near the locking member has a locking groove that corresponds to and cooperates with the locking block. The locking block and the locking groove lock each other so that the retractable arm is kept in the retracted or extended state. When the locking block leaves the locking groove, the retractable arm swings around the pin between the retracted and extended states. The locking grooves on the retractable arm are arranged circumferentially along a circle of equal diameter with the pin as the center. The angle difference between the retracted and extended states of the retractable arm is equal to the central angle between two adjacent locking grooves on the retractable arm with the pin as the center.

[0010] Preferably, the pin seat is provided with a guide portion at the position corresponding to the locking block.

[0011] Preferably, a return element is provided between the head end of the pin and the housing to return the locking element on the pin to its original position.

[0012] This utility model also provides a shoe sole, including a midsole and the above-mentioned retractable pulley device. The forefoot and / or heel portion of the bottom of the midsole is provided with a receiving groove, and the retractable pulley device is adapted to be installed and fixed in the receiving groove. A through hole is provided on the side of the midsole corresponding to the position of the pin, and an operating rod acting on the pin is slidably inserted in the through hole.

[0013] The present invention further provides a shoe, including an upper and the aforementioned sole, wherein the upper is fixedly disposed on the sole.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This utility model relates to a retractable pulley device, comprising a housing, a retractable arm rotatably mounted on the housing, and a pulley assembly on the retractable arm. The retractable arm rotates around an axis, causing the pulley assembly to retract into the housing or extend outwards from it. Locking and unlocking of the retractable arm are achieved through the relative movement of a locking element, resulting in two locked states: a retracted state and an extended state. In the extended state, the retractable arm abuts against an inclined support surface within the housing, working in conjunction with the locking element to maintain stable locking in the extended state. Simultaneously, it effectively disperses ground reaction forces to the housing and sole, reducing negative effects on the retractable arm, its connection points, and the locking structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the shoe sole structure of the retractable pulley device of this utility model in the retracted state.

[0016] Figure 2 This is a schematic diagram of the shoe sole structure in the unfolded state of the retractable pulley device of this utility model.

[0017] Figure 3 This is a schematic diagram of the retractable pulley device of this utility model.

[0018] Figure 4 This is a schematic diagram of the housing structure of the retractable pulley device of this utility model.

[0019] Figure 5 This is a schematic diagram of the interior of the housing of the retractable pulley device with operating lever of this utility model in its retracted state.

[0020] Figure 6 This is a schematic diagram of the interior of the housing of the retractable pulley device of this utility model in its retracted state.

[0021] Figure 7 This is a schematic diagram of the external structure of the top of the housing of the retractable pulley device of this utility model.

[0022] Figure 8 This is a schematic diagram of the retractable pulley device of this utility model, showing the retractable arm, pin, and pulley assembly.

[0023] Figure 9 This is a schematic diagram of the retractable arm and pin structure of the retractable pulley device of this utility model.

[0024] Figure 10 This is a schematic diagram of the locking component of this utility model.

[0025] Figure 11 This is a schematic diagram of the housing structure of this utility model.

[0026] Figure 12 This is a schematic diagram of the external structure of the housing of this utility model.

[0027] The markings in the diagram are as follows: 100, sole; 101, operating lever; 200, retractable pulley device; 21, housing; 210, groove; 211, upright plate; 212, locking hole; 213, locking groove; 214, support body; 215, inclined support surface; 216, protrusion; 217, notch; 218, protective seat; 219, insertion hole; 2110, guide part; 22, retractable arm; 221, groove; 222, locking groove; 223, blind mounting hole; 224, clearance seam; 23, pulley assembly; 231, wheel axle; 232, roller; 24, pin; 25, locking element; 251, locking block; 26, torsion spring; 27, housing cover; 271, first locking block; 272, second locking block; 28, process cover; 29, limiting element. Detailed Implementation

[0028] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0029] like Figures 1-12 As shown, this embodiment provides a shoe, including a sole 100 and an upper (not shown in the figure) fixedly disposed on the sole 100. The upper can be a slipper upper or an athletic shoe upper, and is not limited thereto. The method of fixing the upper to the sole 100 is conventional technology and will not be described in detail.

[0030] The sole 100 includes a midsole, an outsole, and a retractable pulley device 200. The forefoot and heel portions of the bottom of the midsole are provided with receiving grooves, in which the retractable pulley device 200 is adapted to be installed and fixed. The retractable pulley device 200 includes a housing 21 with an open bottom, a retractable arm 22, and a pulley assembly 23 installed on the free end of the retractable arm 22. The outsole is hollowed out at the position corresponding to the retractable pulley device 200 so that the pulley assembly 23 of the retractable pulley device 200 can be extended downward to protrude from the outsole and retracted upward to enter the housing 21.

[0031] In this embodiment, the retractable arm 22 has a T-shaped structure, consisting of a horizontal part and a vertical part. The end of the horizontal part is the connecting end of the retractable arm 22, while the end of the vertical part away from the horizontal part is the free end of the retractable arm 22. The connecting end of the retractable arm 22 is rotatably mounted inside the housing 21 via a pin 24 passing through a pin seat. The pin seat can be locked and fixed inside the housing 21 by fasteners, or it can be integrally formed with the housing 21. The pin seat includes two vertical plates 211, forming an installation space between the two vertical plates 211 for rotatably mounting the connecting end of the retractable arm 22. Corresponding vertical plate pin holes are provided on the two vertical plates 211 for the pin 24 to pass through horizontally. The connecting end of the retractable arm 22 is provided with a retractable arm pin hole, and the pin 24 passes through the vertical plate pin holes and the retractable arm pin hole on the two vertical plates 211. The vertical part is basically located at the centerline of the housing 21, parallel to the front-back extension direction of the sole 100.

[0032] In this embodiment, the pulley assembly 23 is a double wheel assembly. Specifically, a wheel axle 231 is horizontally inserted through the free end of the retractable arm 22. Both ends of the wheel axle 231 extend beyond the free end of the retractable arm 22, and rollers 232 are respectively installed at the two ends of the wheel axle 231 extending beyond the retractable arm 22 via ball bearings. The side of the rollers 232 away from the free end of the retractable arm 22 is engaged with the end of the wheel axle 231 by a snap ring. The two rollers 232 are in clearance fit with the inner wall of the housing 21. The clearance is generally controlled between 0.5mm and 1.2mm, so that the pulley assembly 23 can rotate smoothly up and down around the pin 24.

[0033] The retractable pulley device 200 of this embodiment also includes a cover 27, which is detachably fitted at the bottom opening of the housing 21. This allows the pulley assembly 23 to be unfolded downwards and protrude from the housing 21 after the cover 27 is removed, and also allows the cover 27 to be closed after the pulley assembly 23 is retracted upwards and into the housing 21. The connection between the cover 27 and the housing 21 prevents the pulley assembly 23 from being accidentally unfolded.

[0034] As a preferred example of the detachable engagement between the cover 27 and the base 21, this embodiment features a snap-fit ​​engagement between the cover 27 and the base 21. Specifically, the base 21 has two snap-fit ​​holes 212 on one side of its bottom opening, spaced apart on the left and right. The other side of the bottom opening of the base 21 has two snap-fit ​​grooves 213, also spaced apart on the left and right. The snap-fit ​​holes 212 and grooves 213 are located on the front and rear sides of the base 21, respectively, with the grooves 213 being shallower. To facilitate disengagement, the cover 27 has a first locking block 271 on one side that engages with the locking hole 212, and a second locking block 272 on the other side that engages with the locking groove 213. The first locking block 271 and the second locking block 272 each have a hook that engages with the locking hole 212 and the locking groove 213, respectively. When installing the cover 27, first align the first locking block 271 with the locking hole 212 and insert it, then align the second locking block 272 with the locking groove 213 and press it in. To facilitate opening the cover 27, the base 21 has a notch 210 on the bottom surface corresponding to the edge of the cover 27. A fingernail inserted into the notch 210 and slight pressure applied can overcome the locking force between the second locking block 272 and the locking groove 213, allowing the cover 27 to be removed.

[0035] In this embodiment, the retractable arm 22 rotates up and down around the pin 24, having two locking states: a retracted state and an extended state. The retracted state corresponds to the pulley assembly 23 retracting into the housing 21 and not protruding from the bottom opening of the housing 21. The extended state corresponds to the pulley assembly 23 extending out of the housing 21, with the retractable arm 22 at an angle relative to the ground. In this embodiment, the retractable arm 22 of the retractable pulley device 200 at the forefoot of the sole 100 tilts forward from top to bottom, while the retractable arm 22 of the retractable pulley device 200 at the heel of the sole 100 tilts backward from top to bottom. To enhance the load-bearing capacity of the retractable arm 22 in the extended state and reduce its negative impact on the pin 24, a support body 214 is provided inside the housing 21 in this embodiment. The support body 214 has an inclined support surface 215 that abuts against the retractable arm 22 in the extended state, distributing the force transmission of the retractable arm 22 to the support body 214 and the midsole. The width of the inclined support surface 215 is 3mm-10mm.

[0036] The support body 214 is integrally formed with the shell base 21. The outer wall of the shell base 21 has an inwardly recessed notch 217 at the position corresponding to the support body 214. The receiving groove of the midsole has an insert that matches the notch 217 at the position corresponding to the notch 217. The insert and the notch 217 cooperate to enhance the bonding stability between the shell base 21 and the midsole and enhance the pressure resistance in the unfolded state. In addition, there are also mutually cooperating protrusions 216 and grooves 221 between the inclined support surface 215 and the retractable arm 22. The protrusions 216 and grooves 221 can limit the lateral displacement of the retractable arm 22 in the unfolded state and maintain stability.

[0037] The retractable arm 22 is connected to a locking member 25 for keeping the retractable arm 22 in the retracted and extended states. The locking member 25 and the retractable arm 22 move relative to each other to lock or unlock them. Specifically: the head of the pin 24 is exposed outside the housing 21, while the end of the pin 24 is located inside the housing 21. A through hole is provided on the side of the middle bottom corresponding to the position of the pin 24. An operating rod 101 that acts on the pin 24 is slidably inserted into the through hole. The locking member 25 is locked and fixed to the end of the pin 24 by screws and pressure plates. The end of the pin 24 has a screw hole that is threaded to fit the screw. The pin 24 only moves axially relative to the housing 21. When an external force is applied to the head of the pin 24, it can drive the pin 24 and the locking member 25 on it to move axially, so that the locking member 25 is unlocked from the retractable arm 22. When a reverse force is applied to the pin 24, it can drive the pin 24 and the locking member 25 on it to move axially in the opposite direction, so that the locking member 25 is locked from the retractable arm 22.

[0038] The locking member 25 has a locking block 251 facing the connecting end of the retractable arm 22. The connecting end of the retractable arm 22 is provided with a locking groove 222 that corresponds to and cooperates with the locking block 251. The locking grooves 222 on the retractable arm 22 are arranged circumferentially along a circle of equal diameter with the pin 24 as the center. There are 3 locking grooves 222. There are also 3 locking blocks 251 that are evenly arranged around the locking member 25. Since the pin 24 and its locking member 25 only undergo axial displacement relative to the housing 21, during the switching between the retracted and extended states, the retractable arm 22 rotates around the pin 24, causing the locking groove 222 on it to rotate synchronously. The circumferential locking groove 222 will rotate to the original position of the circumferential locking groove 222. In this way, after the locking member 25 returns to its original position, the locking block 251 can engage with the locking groove 222 to lock it. The locking block 251 and the locking groove 222 lock each other to keep the retractable arm 22 in the retracted or extended state. When the locking block 251 leaves the locking groove 222, the retractable arm 22 swings between the retracted and extended states around the pin 24. The angle difference between the retracted and extended states of the retractable arm 22 is equal to the central angle between two adjacent circumferential locking grooves 222 on the retractable arm 22 with the pin 24 as the center.

[0039] In order to ensure that the pin 24 only moves axially relative to the housing 21, a guide portion 2110 is provided on the upright plate 211 near the locking member 25 of the pin seat at the position corresponding to the locking block 251. The guide portion 2110 is specifically a guide hole or a guide groove. The locking block 251 moves axially along the guide portion 2110 and restricts the rotation of the pin 24.

[0040] In order to enable the pin 24 to automatically reset and drive the locking block 251 to automatically lock when facing the locking groove 222, a return member is provided between the head end of the pin 24 and the housing 21 to return the locking member 25 on the pin 24 to its original position. The return member is a compression spring (not shown in the figure). The housing 21 is provided with a protective seat 218 at the position corresponding to the compression spring. The protective seat 218 has a mounting cavity, and the compression spring is located in the mounting cavity. The pin 24 passes through the protective seat 218 and is connected to a limiting member 29 at the head end of the pin 24. The compression spring is sleeved on the outside of the pin 24. One end of the compression spring abuts against the inner wall of the mounting cavity and the other end abuts against the limiting member 29. When sufficient force is applied to the limiting member 29, the compression spring can overcome the axial displacement of the pin 24, thereby causing the locking block 251 on the locking member 25 to leave the locking groove 222 along the guide portion 2110. At this time, the retractable arm 22 can be rotated. After the force is released, the compression spring rebounds, causing the pin 24 and the locking member 25 on it to return to their original positions and re-enter the locking groove 222 to maintain the retracted or extended state.

[0041] The retractable arm 22 has a blind mounting hole 223 at the position corresponding to the pin 24, which communicates with the pin hole of the retractable arm. The pin 24 passes through the pin hole and the blind mounting hole 223. A torsion spring 26 is sleeved on the pin 24 at the connecting end of the retractable arm 22. One torsion arm of the torsion spring 26 abuts against the inner wall of the blind mounting hole 223, while the other torsion arm is inserted into the top wall of the housing 21. The side wall of the blind mounting hole 223 has a clearance slot 224 that cooperates with the torsion arm inserted into the top wall of the housing 21. This clearance slot 224 allows the retractable arm 22 to rotate at a large angle to the unfolded state, where it abuts against the inclined support surface 215 of the support body 214. The driving force of the torsion spring 26 on the retractable arm 22 is insufficient to open the cover 27.

[0042] To accommodate both the forefoot and heel retractable pulley devices 200, the connecting end of the retractable arm 22 has a second locking groove on the side away from the locking member 25, corresponding to the locking block 251. This means both sides of the connecting end of the retractable arm 22 have locking portions that engage with the locking block 251. The sidewall of the mounting blind hole 223 has two clearance slots 224 arranged side-by-side, allowing for easy forward and backward rotation. Furthermore, to accommodate both the forefoot and heel retractable pulley devices 200, the top wall of the housing 21 has two insertion holes 219 arranged side-by-side, engaging with the torsion arm of the torsion spring 26.

[0043] To facilitate the assembly of the locking component 25 and the pin 24, a process hole and a process cover 28 for sealing the process hole are provided on the side wall of the housing 21 near the locking component 25 at the position corresponding to the pin 24. The pin 24 and the locking component 25 pass through the process hole and then through the pin seat, the retractable arm 22 and the opposite side wall of the housing 21. After assembly, the process hole is blocked with the process cover 28. The process cover 28 is the same color and material as the housing 21, so that the interior of the housing 21 can be viewed as an integral whole after the cover 27 is removed.

[0044] In other examples, while keeping other components unchanged, the pulley assembly 23 can also be a single wheel, the only difference being that: the free end of the retractable arm 22 has a U-shaped structure consisting of two columns and a horizontal bar connected to the bottom of the two columns; a single roller is rotatably mounted on an axle via a ball bearing, and the axle is horizontally mounted and locked within the U-shaped structure; two supports are provided, located on the left and right sides inside the housing, respectively; the two columns at the free end of the retractable arm correspond to the two supports front and rear, respectively; each support has an inclined support surface that abuts against the columns on the retractable arm in the extended state; the force transmission of the retractable arm is distributed to the supports and the bottom. The inclined support surface and the columns also have a concave-convex fitting structure.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications may be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. A retractable pulley device, characterized in that: The device includes a housing with an open bottom, a retractable arm, and a pulley assembly mounted on the free end of the retractable arm. The connecting end of the retractable arm is rotatably mounted inside the housing via a pin passing through a pin seat. The retractable arm is connected to a locking member for maintaining the retractable arm in a retracted and extended state. The locking member and the retractable arm move relative to each other to lock or unlock them. The housing contains a support body with an inclined support surface that abuts against the retractable arm in the extended state.

2. The retractable pulley device according to claim 1, characterized in that: The retractable pulley device also includes a cover that is detachably fitted into the bottom opening of the housing.

3. The retractable pulley device according to claim 1, characterized in that: The inclined support surface and the retractable arm are also provided with mutually cooperating protrusions and grooves.

4. The retractable pulley device according to claim 1, characterized in that: The pulley assembly can be a single wheel or a double wheel.

5. The retractable pulley device according to claim 1, characterized in that: A torsion spring is provided on the outer sleeve of the pin at the corresponding position of the connecting end of the retractable arm. One torsion arm of the torsion spring abuts against the inner wall of the mounting blind hole, while the other torsion arm is inserted into the top wall of the housing.

6. The retractable pulley device according to any one of claims 1 to 5, characterized in that: The pin head is exposed outside the housing, while the pin end is located inside the housing. The pin only moves axially relative to the housing. The locking member is fixedly installed at the pin end. The locking member has a locking block facing the connecting end of the retractable arm. The connecting end of the retractable arm near the locking member has a locking groove that corresponds to and engages with the locking block. The locking block and the locking groove lock each other so that the retractable arm is kept in the retracted or extended state. When the locking block leaves the locking groove, the retractable arm swings around the pin between the retracted and extended states. The locking grooves on the retractable arm are arranged circumferentially around a circle of equal diameter with the pin as the center. The angle difference between the retracted and extended states of the retractable arm is equal to the central angle between two adjacent locking grooves on the retractable arm with the pin as the center.

7. The retractable pulley device according to claim 6, characterized in that: The pin seat is provided with a guide at the position corresponding to the locking block.

8. The retractable pulley device according to claim 6, characterized in that: A return element is provided between the head end of the pin and the housing to return the locking element on the pin to its original position.

9. The sole of the shoe, characterized in that: The device includes a midsole and a retractable pulley device as described in any one of claims 6 to 8. The forefoot and / or heel portion of the bottom of the midsole is provided with a receiving groove, in which the retractable pulley device is adapted to be installed and fixed. A through hole is provided on the side of the midsole corresponding to the position of the pin, and an operating rod that acts on the pin is slidably inserted in the through hole.

10. A shoe, characterized by: It includes an upper and a sole as described in claim 9, wherein the upper is fixedly disposed on the sole.

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