Locking mechanism applied to pulley device

Abstract

The utility model relates to a locking mechanism applied to a pulley device, which comprises a pulley seat, a containing groove is arranged in the pulley seat, a limiting piece is arranged in the middle of the containing groove, and a sliding block is arranged at the rear end of the containing groove. A U-shaped hole communicated with the containing groove is formed in the rear side wall of the base, a control rod is inserted into the U-shaped hole in a penetrating mode, and a reset spring used for driving the control rod to extend outwards is installed in the U-shaped hole. At least two parallel guide grooves are formed in the top face of the sliding block, an upper cover is arranged on a groove opening of the containing groove, and protruding edges corresponding to the guide grooves in a one-to-one mode are arranged on the bottom face of the upper cover. The two parallel guide grooves are formed in the top face of the sliding block of the locking mechanism, the protruding edges corresponding to the guide grooves in a one-to-one mode are arranged on the bottom face of the upper cover, the sliding block is limited to linearly slide back and forth in the front-back direction of the pulley base through matching of the protruding edges and the guide grooves, the occupied space of accessories is greatly reduced, the height of the pulley device is low, and then the thickness of a shoe sole is reduced; therefore, the sole is lighter and more comfortable to wear.

Description

Technical Field

[0001] This utility model relates to the field of roller shoes, and in particular to a locking mechanism applied to a pulley device. Background Technology

[0002] Heel shoes feature simple wheels on the sole, allowing for both walking and gliding, satisfying the need for exciting and entertaining exercise, making them popular among young people today. Existing Heel shoes incorporate a linkage mechanism for the drive wheel frame and a locking mechanism to control the unfolding or retraction of the wheel frame. Through the cooperation of the linkage and locking mechanisms, the Heel shoes can switch between gliding and walking functions.

[0003] Referring to Chinese invention patent CN110833685B, a folding pulley device is disclosed, including a front wheel frame, a rear wheel frame, a housing, a linkage frame, and a switching mechanism. The switching mechanism further includes a guide seat, a slider, a compression spring, and a trigger rod. The guide seat is fixedly installed in the mounting cavity and has a slide rail arranged along the front-rear direction of the housing. The slider slides in cooperation with the slide rail and has a slot that drives the locking shaft to move up and down along a vertical limiting hole. The compression spring is installed between the front end of the slider and the guide seat. The switching mechanism allows the locking shaft to switch between a folding slot and an unfolding slot, thus maintaining the folded and unfolded states of the folding pulley device. However, the guide seat occupies a large space in this type of pulley device, and the pulley seat requires a large mounting cavity to accommodate it, resulting in an excessively high pulley device, making the sole too thick and heavy. The structural design is unreasonable, and the wearing experience of the shoe is poor. Summary of the Invention

[0004] This invention provides a pulley locking mechanism for roller shoes to overcome the problems of existing pulley devices having a large space occupied by the switch structure, resulting in an overly thick sole and affecting the wearing experience.

[0005] The present invention adopts the following technical solution:

[0006] A pulley locking mechanism for a roller shoe includes a pulley base, with a wheel frame that can swing around an axis mounted at the front and rear ends of the pulley base. A limiting hole is provided on the side wall of the pulley base, through which a locking rod that can move up and down is inserted. The wheel frame has a closing latch and an unfolding latch for engaging the locking rod to lock the wheel frame. A receiving groove is provided within the pulley base, with a limiting member in the middle of the receiving groove. A slider is mounted at the rear end of the receiving groove, and a compression spring is installed between the slider and the limiting member. The slider has a guide hole for driving the locking rod to move up and down along the limiting hole. A U-shaped hole communicating with the receiving groove is provided on the rear side wall of the base, with a control rod inserted through the U-shaped hole. A return spring for driving the control rod to extend outwards is installed in the U-shaped hole. At least two parallel guide grooves are provided on the top surface of the slider, and a top cover is provided at the opening of the receiving groove. The bottom surface of the top cover has protrusions corresponding to the guide grooves.

[0007] In a further improvement, the aforementioned limiting member is provided with a screw hole groove, and the aforementioned upper cover is connected to the aforementioned pulley seat by inserting a screw into the screw hole groove.

[0008] Further improvements include two parallel guide grooves on the top surface of the slider and two parallel ridges on the bottom surface of the top cover.

[0009] In a further improvement, the control lever has an annular protrusion in the middle, and the reset spring is located between the annular protrusion and the inner wall of the U-shaped hole.

[0010] In a further improvement, the rear end of the control lever is provided with a safety ridge extending along its length, which is used to prevent the control lever from being inserted inward.

[0011] As can be seen from the above description of the structure of this utility model, compared with the prior art, this utility model has the following advantages:

[0012] 1. The top surface of the slider of the locking mechanism of this utility model is provided with two parallel guide grooves, and the bottom surface of the upper cover is provided with protrusions that correspond one-to-one with the guide grooves. Through the cooperation of the protrusions and the guide grooves, the slider is restricted to slide back and forth in a straight line along the pulley seat, which greatly reduces the space occupied by the accessories. The pulley device is low in height, thereby reducing the thickness of the sole and making the sole lighter and more comfortable to wear.

[0013] 2. A return spring is fitted on the control rod, which is located between the control rod and the inner wall of the U-shaped hole. When the return spring returns to its original shape, it causes the control rod to extend outward automatically, making it easy for the hand to hold the control rod and push the slider forward again. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the pulley device of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the pulley device of the present invention after the top cover is opened.

[0016] Figure 3 This is an exploded view of the pulley device of the present invention.

[0017] Figure 4 This is a side view of the pulley device of the present invention when it is unfolded.

[0018] Figure 5 This is a side view of the pulley device of the present invention when it is closed.

[0019] Figure 6 This is a top view of the pulley device of the present invention.

[0020] Figure 7 This is a bottom view of the pulley device of the present invention.

[0021] Figure 8 This is a three-dimensional structural diagram of the linkage mechanism and pulley assembly of the present invention.

[0022] Figure 9 The pulley device of the present invention along Figure 6 A schematic diagram of the cross-sectional structure in the DD direction. Detailed Implementation

[0023] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0024] Reference Figure 2 The locking mechanism of the roller 61 of the roller shoes in this application is applied to the roller 61 device. The roller 61 device includes a roller 61 assembly, a linkage mechanism, a locking mechanism and a roller seat 1. The roller seat 1 is provided with a receiving groove 10. The groove opening of the receiving groove 10 is detachably connected to a top cover 11. The top cover 11 is connected to the roller seat 1 by screws, which facilitates the maintenance of the accessories inside the roller seat 1.

[0025] Reference Figure 3 and Figure 9The linkage mechanism includes a front wheel frame 2, a rear wheel frame 3, a tension spring 53, and a linkage frame 5. The linkage frame 5 is installed in the receiving groove 10. The linkage frame 5 consists of a connecting plate 52 and linkage arms 51 arranged parallel to each other at both ends of the connecting plate 52. The connecting plate 52 and the linkage arms 51 are integrally formed in an H-shape. The connecting plate 52 enables the linkage arms 51 to move back and forth synchronously. The linkage frame 5 is installed in the pulley seat 1, which is not easily affected by dust blockage. The front and rear ends of the pulley seat 1 are respectively provided with fixed rotating shafts 12 connecting the front wheel frame 2 and the rear wheel frame 3. The front wheel frame 2 and the rear wheel frame 3 are distributed on the left and right sides of the pulley seat 1. The fixed rotating shafts 12 extend outward from the inside of the pulley seat 1, and the front wheel frame 2 and the rear wheel frame 3 are rotatably connected to the outer end of the fixed rotating shafts 12. The front and rear ends of the linkage arm 51 are respectively provided with a movable shaft 13 connecting the front wheel frame 2 and the rear wheel frame 3. The outer wall of the pulley seat 1 is provided with an arc-shaped hole 102 for restricting the rotation of the movable shaft 13 around the fixed shaft 12. The movable shaft 13 passes through the arc-shaped hole 102, and the front wheel frame 2 and the rear wheel frame 3 are rotatably connected to the outer end of the movable shaft 13. The arc-shaped hole 102 at the front end of the pulley seat 1 is located below its front fixed shaft 12, and the arc-shaped hole 102 at the rear end of the pulley seat 1 is located above its rear fixed shaft 12. When retracted, the front wheel frame 2 swings backward around the fixed shaft 12 at the front end of the pulley seat 1, and the rear wheel frame 3 swings backward around the fixed shaft 12 at the rear end of the pulley seat 1, that is, the front wheel frame 2 and the rear wheel frame 3 swing towards each other. The connecting plate 52 is connected to the fixed rotating shaft 12 at the front end of the pulley seat 1 via a tension spring 53. The connecting plate 52 has a round hole, one end of the tension spring 53 hooks into the round hole, and the other end of the tension spring 53 is connected to the fixed rotating shaft 12. When the tension spring 53 is in a stretched state, the force of the tension spring 53 restoring its deformation drives the front wheel frame 2 to swing forward, and at the same time, the rear wheel frame 3 swings backward, automatically unfolding the front wheel frame 2 and the rear wheel frame 3. The operation is simple and convenient. The bottom of the receiving groove 10 is provided with a strip hole 103 corresponding to the linkage arm 51. Since the front and rear ends of the linkage arm 51 are curved, the strip hole 103 facilitates the sliding of the linkage arm 51 back and forth. At the same time, the strip hole 103 has the function of slide rail guidance, so that the fixed rotating shaft 12 swings more smoothly in the arc hole 102. The bottom of the front wheel frame 2 and the rear wheel frame 3 are connected to the pulley 61 assembly. The pulley 61 assembly consists of a shaft 6 and pulleys 61 rotatably connected to both ends of the shaft 6. The shaft 6 passes through the front wheel frame 2 and the rear wheel frame 3, and the shaft 6 is rotatably connected to the front wheel frame 2 and the rear wheel frame 3.

[0026] The locking mechanism includes a slider 4, a compression spring 42, a locking rod 33, and a control rod 43. A limiting member 15 is provided in the middle of the bottom of the receiving groove 10. A gap is reserved between the limiting member 15 and the inner wall of the receiving groove 10. The linkage arms 51 pass through this gap. The limiting member 15 does not affect the forward and backward sliding of the linkage frame 5. The slider 4 is installed at the rear end of the receiving groove 10. The compression spring 42 is installed between the slider 4 and the limiting member 15. The compression spring 42 is in a compressed state. The force of the compression spring 42 restoring its deformation drives the slider 4 to move backward. The pulley seat 1 is provided with a limiting hole 101 for limiting the lifting and lowering movement of the locking rod 33. The slider 4 is provided with a guide hole 40 for causing the locking rod 33 to lift and lower along the limiting hole 101. The limiting hole 101 is aligned with the guide hole 40. The locking rod 33 simultaneously passes through the limiting hole 101 and the guide hole 40. The guide hole 40 is inclined upward from front to back along the direction of the pulley seat 1. The rear wheel frame 3 has a retractable latch 31 along its side edge that engages with the locking rod 33 to retract the pulley 61 group, and an unfolding latch 32 along its upper edge that engages with the locking rod 33 to unfold the pulley 61 group. A U-shaped hole 104 is provided on the rear side wall of the pulley seat 1. A control rod 43 is inserted into the U-shaped hole 104 until its inner end abuts against the slider 4. The control rod 43 is used to push the slider 4 forward, causing the locking rod 33 to rise along the limiting hole 101, thus releasing the locking rod 33 from engaging the retractable latch 31 or the unfolding latch 32.

[0027] Reference Figure 3 The top of the slider 4 is provided with a guide groove 41 extending in the front-back direction, and the bottom surface of the top cover 11 is provided with a protrusion 111 that fits into the guide groove 41. The cooperation between the protrusion 111 and the guide groove 41 enables the slider 4 to slide in a straight front-back direction, ensuring that the direction of the spring force of the compression spring 42 on the slider 4 does not deviate, thereby driving the locking rod 33 to slide upward along the guide hole 40.

[0028] Reference Figure 5 The lower middle part of the pulley seat 1 is provided with a groove 14. When it is closed, the front wheel frame 2 and the rear wheel frame 3 swing towards each other until the pulley 61 assembly falls into the groove 14, and the locking rod 33 is engaged with the closing slot 31.

[0029] Reference Figure 2 , Figure 3 The rear side wall of the base is provided with a U-shaped hole 104 that connects to the receiving groove 10. A control rod 43 is inserted into the U-shaped hole 104. A return spring 431 for driving the control rod 43 to extend outward is installed in the U-shaped hole 104. The control rod 43 is provided with an annular protrusion in the middle. The return spring 431 is located between the annular protrusion and the inner wall of the U-shaped hole 104.

[0030] Reference Figure 2The aforementioned limiting member 15 is provided with a screw hole groove, and the rear side wall of the pulley seat 1 is also provided with a screw hole groove. The aforementioned upper cover 11 is connected to the pulley seat 1 by inserting screws into the screw hole grooves. The three screw holes form a triangular structure, and the upper cover 11 is firmly and stably connected to the pulley seat 1.

[0031] Reference Figure 7 The bottom of the rear end of the aforementioned accommodating groove 10 is provided with an opening, and a lower cover 16 is installed at the opening. The opening facilitates the inspection and maintenance of the internal components of the pulley seat 1, and the structure is reasonably designed.

[0032] Reference Figure 1 The rear end of the control lever 43 is provided with a safety protrusion extending along its length. The safety protrusion is used to prevent the control lever 43 from being inserted inward. The cross-section of the safety protrusion and the control lever 43 is similar to the shape of the opening of the U-shaped hole 104. When the control lever 43 is rotated until the safety protrusion is offset from the opening of the U-shaped hole 104, it can prevent accidental contact with the control lever 43 from causing the pulley 61 to close, thus ensuring safer sliding.

[0033] Reference Figures 1-9 When the pulley device unfolds the pulley assembly, the hand grasps the control lever 43 and pushes the slider 4 forward. The inclined lower inner wall of the guide hole 40 pushes the locking lever 33 upward, driving the locking lever 33 to rise along the limiting hole 101 until it disengages from the retraction latch 31, releasing the locking lever 33 from locking the rear wheel frame 3. The tension spring 53 restores its deformation and drives the front wheel frame 2 to swing forward. The front wheel frame 2 transmits the rear wheel frame 3 to swing backward through the linkage arm 51. The front wheel frame 2 and the rear wheel frame 3 unfold in opposite directions. The unfolding latch 32 of the rear wheel frame 3 is aligned with the limiting hole 101. The control lever 43 is released, and the return spring 431 causes the control lever 43 to automatically pop outward. The elastic force of the compression spring 42 restores its deformation and causes the slider 4 to slide backward. The inclined upper inner wall of the guide hole 40 presses down the locking lever 33, driving the locking lever 33 to descend along the limiting hole 101 until it engages the unfolding latch 32, ensuring that the rear wheel frame 3 is not easy to swing back. The pulley 61 rolls and slides safely and reliably.

[0034] Or, continue to refer to Figures 1-9When the pulley device retracts the pulley assembly, grasp the control lever 43 and push the slider 4 forward. The inclined lower inner wall of the guide hole 40 pushes the locking lever 33 upward, driving the locking lever 33 to rise along the limiting hole 101 until it disengages from the unfolding latch 32. With the other hand, swing the rear wheel frame 3 forward until the pulley assembly falls into the groove 14. The rear wheel frame 3 drives the front wheel frame 2 to swing backward through the transmission arm until the pulley assembly falls into the groove 14. That is, the front wheel frame 2 and the rear wheel frame 3 swing towards each other. The retraction of the rear wheel frame 3... The bayonet 31 is aligned with the limiting hole 101. When the control lever 43 is released, the return spring 431 causes the control lever 43 to automatically pop outward. The spring force of the compression spring 42 restores its deformation and causes the slider 4 to slide backward. The inclined upper inner wall of the guide hole 40 presses down on the locking lever 33, driving the locking lever 33 to descend along the limiting hole 101 until it engages with the retractable bayonet 31. This ensures that the rear wheel frame 3 is not easy to swing back. The retractable pulley assembly is easy to operate, requires no tools, and can be done anytime and anywhere, bringing convenience to people's travel.

[0035] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A locking mechanism for a pulley device, comprising a pulley seat, a wheel frame that can swing around an axis mounted on the front and rear ends of the pulley seat, a limiting hole provided on the side wall of the pulley seat, a locking rod that can move up and down inserted into the limiting hole, and the wheel frame provided with a closing latch and an unfolding latch for engaging the locking rod to lock the wheel frame, characterized in that: The pulley seat has a receiving groove, a limiting member in the middle of the receiving groove, a slider installed at the rear end of the receiving groove, a compression spring installed between the slider and the limiting member, and a guide hole for driving the locking rod to move up and down along the limiting hole; the rear side wall of the base has a U-shaped hole communicating with the receiving groove, a control rod is inserted in the U-shaped hole, and a return spring for driving the control rod to extend outward is installed in the U-shaped hole; the top surface of the slider has at least two parallel guide grooves, the opening of the receiving groove is provided with a top cover, and the bottom surface of the top cover has protrusions corresponding to the guide grooves one by one.

2. The locking mechanism applied to a pulley device as described in claim 1, characterized in that: The limiting component is provided with a screw hole groove, and the upper cover is connected to the pulley seat by screws inserted into the screw hole groove.

3. A locking mechanism for a pulley device as described in claim 1, characterized in that: The top surface of the slider is provided with two parallel guide grooves, and the bottom surface of the upper cover is provided with two parallel ridges.

4. A locking mechanism for a pulley device as described in claim 1, characterized in that: The control rod has an annular protrusion in the middle, and the reset spring is located between the annular protrusion and the inner wall of the U-shaped hole.

5. A locking mechanism for a pulley device as described in claim 1, characterized in that: The control lever has a safety ridge extending along its length at its rear end, which is used to prevent the control lever from being inserted inward.

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