Conveniently put on and taken off work shoes

CN224924643UActive Publication Date: 2026-11-03ZHEJIANG LUOCHI TECH CO LTD
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Patent Information

Application Number
CN202522775264.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-12-29
Publication Date
2026-11-03
Estimated Expiration
2035-12-29

AI Technical Summary

Technical Problem

Traditional work shoes with lace-up closures are cumbersome to put on and take off. Existing quick-release designs such as Velcro, zippers, or knobs are insufficient in terms of reliability and protection, making it difficult to achieve quick and reliable putting on and taking off.

Method used

The shoelace locking and releasing mechanism, controlled by a flip cover, combines a ratchet and tooth mechanism to achieve one-way self-locking of the shoelaces. It uses a permanent magnet to provide magnetic attraction and mechanical transmission, and is built into the fixing seat at the shoe tongue, simplifying the operation process.

Benefits of technology

It enables quick on and off of safety shoes, ensures secure fastening, avoids damage from external hooks, and retains the versatility and stability of traditional shoelace systems.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a work shoe technical field especially, is particularly related to a kind of work shoes of convenient putting on and taking off, including shoe sole, fixed base, disc, steering limiting component, adsorption component, flap and locking mechanism, shoe upper is set on shoe sole, tongue and shoelace are on shoe upper;Fixed base is set for rope groove and two round grooves A;Disc is set in round groove A and sets round groove C and anti-skid block;Steering limiting component is used to make disc only one-way rotation;Adsorption component is used to provide the magnetic attraction that makes anti-skid block retract to disc axle direction;Flap is rotatably set on fixed base, push component for pushing anti-skid block along the radial direction of disc outward and locking mechanism for making flap and fixed base keep closed state are set on flap.The utility model is through a flap type module integrated with magnetic attraction reset, inclined plane pushing and ratchet one-way limiting mechanism, realizes the intelligent management of " cover synchronous compression and one-way locking, cover instantaneous release" to traditional shoelace.
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Description

Technical Field

[0001] This utility model relates to the field of safety shoes technology, and in particular to a safety shoe that is easy to put on and take off. Background Technology

[0002] Safety shoes, as important personal protective equipment, are widely used in many work scenarios. Traditional safety shoes mostly use a lace-up closure, which is secure, but the process of putting them on and taking them off is cumbersome, requiring repeated tightening and loosening of the laces. This is not only time-consuming and laborious, but also particularly inconvenient in emergency situations or situations that require frequent putting on and taking off (such as changing shifts or temporarily entering and exiting specific areas).

[0003] To address this issue, some quick-on and off designs have emerged on the market, such as Velcro, side zippers, or simple elastic collars. However, Velcro is prone to aging and loss of adhesion, and its protective properties are generally weaker than lacing systems; zippered shoes may fail when the upper is subjected to lateral impacts or becomes clogged with dirt, and they are not conducive to flexible adjustment and tightening of the foot and ankle joints. Some designs attempt to use knob-type or lever-type locking systems to tighten shoelaces, but these structures often protrude significantly, making them susceptible to snagging or damage in complex work environments, and the adjustment process remains relatively complicated, failing to achieve a truly "one-click" operation.

[0004] Therefore, there is an urgent need for a work shoe structure that retains the good fit and protection of traditional lace-up shoes while enabling quick and reliable on and off. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a work shoe that is easy to put on and take off.

[0006] The technical solution of this utility model is: a pair of work shoes that are easy to put on and take off, including a sole, a matching upper on the sole, an opening on the upper at the instep, a tongue on the upper for closing the opening from the inside, and a shoelace inserted through the opening on the upper. The fixing seat is set on the outer end face of the shoe tongue. The fixing seat is provided with a rope groove for the shoelace to pass through, and two circular grooves A are provided at intervals along the length of the rope groove on the fixing seat. The circular grooves A cut into the rope groove. The disk includes two disks, which are coaxially arranged in corresponding grooves A. The outer arc surface of the disk and the inner wall of the groove A are provided with an annular gap. The disk is provided with a coaxial groove C. Several anti-slip blocks are arranged in a ring array around the axis on the arc surface of the disk. The ends of the anti-slip blocks that are close to each other are inserted into the groove C. A steering limit assembly is mounted on a fixed base to restrict the disc to rotate freely only in the direction of shoelace tightening. The adsorption component is set in the circular groove C and is used to provide a magnetic attraction force to the anti-slip block, causing it to retract towards the axis of the disk. The flip cover is rotatably mounted on the fixed base. A pushing component is provided on the flip cover. When the flip cover and the fixed base are closed, the pushing component pushes the anti-slip block radially outward into the annular gap along the disc. And a locking mechanism, which is installed on the flip cover, to keep the flip cover in a closed state with the fixed base.

[0007] Preferably, the heel area of ​​the shoe upper is equipped with a pull strap.

[0008] Preferably, anti-slip blocks are provided on both sides of the opening of the rope groove to prevent the shoelaces from coming off from the inside. The anti-slip blocks are flexible wedge-shaped blocks.

[0009] Preferably, the bottom surface of the circular groove A is provided with a circular groove B coaxial with it, the inner diameter of the circular groove B is smaller than the inner diameter of the circular groove A, and the disc is inserted into the circular groove B and rotated coaxially with it.

[0010] Preferably, the steering limiting assembly includes a fixed shaft, a ratchet, and ratchet teeth. The fixed shaft is coaxially disposed on the bottom surface of the circular groove B. The ratchet is coaxial with and fixedly connected to the fixed shaft. A spring rod is disposed on the disc. The ratchet teeth are connected to the movable end of the spring rod and engage with the ratchet in one direction. The steering limiting assembly is configured such that when the shoelaces are pulled in the direction of tightening the shoelaces, the disc drives the ratchet teeth to overcome the elastic force of the spring rod, disengage from the ratchet, and rotate freely.

[0011] Preferably, the adsorption component includes permanent magnets A and B. A frustum is coaxially arranged on the bottom surface of the circular groove C. Several permanent magnets A are arranged in a ring array on the arc surface of the frustum. Each permanent magnet B is connected to one end of the anti-slip block inserted into the circular groove C on the corresponding side. The permanent magnets A and B are aligned one-to-one. At the same time, the magnetic poles of the adjacent ends of each pair of permanent magnets A and B are opposite.

[0012] Preferably, the pushing assembly includes wedge-shaped guide plates and extrusion heads. The number of wedge-shaped guide plates is the same as the number of anti-slip blocks. Each wedge-shaped guide plate is connected to one end of an anti-slip block inserted into a circular groove C. The wedge-shaped guide plates are located above the frustum. The extrusion heads are connected to the flip cover, and each extrusion head is coaxial with the corresponding side of the circular groove C. When the flip cover is closed, the extrusion heads are inserted into the circular groove C and extrude the inclined surface of the wedge-shaped guide plates.

[0013] Preferably, the locking mechanism includes a slot on a fixed base, a wedge-shaped block slidably mounted on a flip cover, and a tensioning assembly. A limiting groove is provided on the flip cover, and a slider is provided in the limiting groove. One end of the wedge-shaped block is inserted into the limiting groove and connected to the slider, while the other end is used to engage with the slot. The tensioning assembly includes two permanent magnets C, which are respectively connected to the inner wall of the limiting groove and the end of the slider away from the wedge-shaped block. The magnetic poles of the two permanent magnets C are the same at their proximal ends to provide a repulsive force that makes the wedge-shaped block tend to engage with the slot.

[0014] Preferably, a dust cover is provided at the opening of the limiting groove, a limiting hole is provided on the dust cover, a lever is provided on the slider, the lever passes through the limiting hole and extends outward, and the slider always closes the limiting hole while the lever slides in the limiting hole.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: The shoelaces can be locked and released with a single button by opening and closing the flip-top, eliminating the tedious steps of traditional shoelace tying and untying, and enabling quick on and off. The ratchet and tooth mechanism achieves one-way self-locking of the shoelaces to prevent accidental loosening during work and ensure a secure fit. The logic of opening the flip-top to loosen and closing it to lock is intuitive and requires no complicated learning. The flip-top automatically locks when closed to prevent accidental opening. The main mechanism is built into the fixing seat at the tongue, without protruding outwards, avoiding external hooking and bumping. The combination of magnetic reset and mechanical transmission ensures good stability and long service life. The traditional shoelace system is retained, making it compatible with various standard work shoes and offering good versatility. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 A schematic diagram of the connection structure between the shoelaces and the mounting bracket; Figure 3 This is a schematic diagram of the connection structure of the components on the mounting base; Figure 4 This is a schematic diagram of the connection structure between the disk and the fixed base; Figure 5 This is a schematic diagram of the connection structure of the various components on the disk. Figure 6 This is a schematic diagram of the connection structure of the various components on the flip cover.

[0017] Reference numerals: 1. Sole; 2. Upper; 201. Opening; 3. Tongue; 4. Lace; 5. Fixing base; 51. Rope groove; 52. Circular groove A; 53. Circular groove B; 54. Slot; 6. Anti-slip block; 7. Fixing shaft; 8. Ratchet; 9. Disc; 91. Circular groove C; 92. Slide groove; 10. Spring rod; 11. Ratchet; 12. Frustum; 13. Permanent magnet A; 14. Anti-slip block; 15. Permanent magnet B; 16. Wedge-shaped guide plate; 17. Flip cover; 18. Extrusion column head; 19. Slider; 20. Wedge-shaped block; 21. Paddle plate; 22. Permanent magnet C; 23. Dust cover; 24. Limiting hole. Detailed Implementation

[0018] Example 1, as Figures 1-6 As shown, this utility model proposes a convenient work shoe, including a sole 1, a fixing base 5, a disc 9, a steering limiting component, an adsorption component, a flip cover 17, and a locking mechanism. The sole 1 has a matching upper 2, and the upper 2 has a pull strap at the heel. The upper 2 has an opening 201 at the instep, and a tongue 3 for closing the opening 201 from the inside. A shoelace 4 is inserted through the opening 201 on the upper 2. The fixing base 5 is located on the outer end face of the tongue 3, and has a rope groove 51 for the shoelace 4 to pass through. Two circular grooves A52 are spaced apart along the length of the rope groove 51 on the fixing base 5, and the circular grooves A52 are cut into the rope groove 51. A circular groove B53 is coaxially arranged on the bottom surface of the circular groove A52, and the inner diameter of the circular groove B53 is smaller than the inner diameter of the circular groove A52. The disc 9 is inserted into the circular groove B53 and rotatably connected to it coaxially. An annular gap is provided between the outer arc surface of the disk 9 and the inner wall of the circular groove A52. A circular groove C91 coaxial with it is provided on the disk 9. Several sliding grooves 92 are arranged in a circular array around its axis on the arc surface of the disk 9. Anti-slip blocks 14 that slide radially along the disk 9 are provided in the sliding grooves. The near ends of the anti-slip blocks 14 are all inserted into the circular grooves C91.

[0019] The steering limit assembly is mounted on the fixed base 5. The steering limit assembly includes a fixed shaft 7, a ratchet 8, and a ratchet 11. The fixed shaft 7 is coaxially mounted on the bottom surface of the circular groove B53. The ratchet 8 is coaxial with the fixed shaft 7 and fixedly connected. A spring rod 10 is mounted on the disc 9. The ratchet 11 is connected to the movable end of the spring rod 10 and engages with the ratchet 8 in one direction. The steering limit assembly is configured such that when the shoelace 4 is pulled in the direction of tightening the shoelace 4, the disc 9 drives the ratchet 11 to overcome the elastic force of the spring rod 10 and disengage from the ratchet 8 to rotate freely.

[0020] The adsorption assembly is set in the circular groove C91. The adsorption assembly includes permanent magnets A13 and B15. A frustum 12 is coaxially arranged on the bottom surface of the circular groove C91. Several permanent magnets A13 are arranged in a ring array on the arc surface of the frustum 12. Each permanent magnet B15 is connected to one end of the anti-slip block 14 on the corresponding side of the circular groove C91. The permanent magnets A13 and B15 are aligned one-to-one. At the same time, the magnetic poles of the adjacent ends of each pair of permanent magnets A13 and B15 are opposite.

[0021] The flip cover 17 is rotatably mounted on the fixed base 5. A pushing assembly is provided on the flip cover 17. When the flip cover 17 and the fixed base 5 are closed, the pushing assembly pushes the anti-slip block 14 radially outward into the annular gap along the disc 9. The pushing assembly includes wedge-shaped guide plates 16 and extrusion heads 18. The number of wedge-shaped guide plates 16 is the same as the number of anti-slip blocks 14. Each wedge-shaped guide plate 16 is connected to one end of an anti-slip block 14 inserted into a circular groove C91. The wedge-shaped guide plates 16 are located above the frustum 12. The extrusion heads 18 are connected to the flip cover 17, and each extrusion head 18 is coaxial with the corresponding side of the circular groove C91. When the flip cover 17 is closed, the extrusion heads 18 insert into the circular groove C91 and extrude the inclined surface of the wedge-shaped guide plates 16.

[0022] A locking mechanism is provided on the flip cover 17 to keep the flip cover 17 in a closed state with the fixed base 5. The locking mechanism includes a slot 54 provided on the fixed base 5, a wedge-shaped block 20 slidably provided on the flip cover 17, and a tensioning assembly. A limiting groove is provided on the flip cover 17, and a slider 19 is provided in the limiting groove. One end of the wedge-shaped block 20 is inserted into the limiting groove and connected to the slider 19, and the other end is used to engage with the slot 54. The tensioning assembly includes two permanent magnets C22. The two permanent magnets C22 are respectively connected to the inner wall of the limiting groove and the end of the slider 19 away from the wedge-shaped block 20. The magnetic poles of the two permanent magnets C22 are the same at the adjacent ends to provide a repulsive force that makes the wedge-shaped block 20 tend to engage with the slot 54.

[0023] In this embodiment, before putting on the shoes, the user first slides the lever 21 on the flip cover 17, causing the slider 19 to disengage the wedge-shaped locking block 20 from the locking groove 54 of the fixing seat 5, thereby opening the flip cover 17. After the flip cover 17 is opened, the pressing head 18 connected to it exits from the circular groove C91 of the disc 9. At this time, the adsorption component in the circular groove C91 begins to function: the permanent magnet A13 set on the frustum 12 and the permanent magnet B15 set at the inner end of the anti-slip locking block 14 generate a magnetic force that attracts each other due to their opposite magnetic poles. Under the action of this magnetic attraction, all the anti-slip locking blocks 14 retract synchronously towards the axial direction of the disc 9 (i.e., inward), so that their outer ends are completely retracted into the sliding groove 92 of the disc 9, no longer protruding from the outer arc surface of the disc 9. In this state, the anti-slip locking blocks 14 do not obstruct the space in the rope groove 51. The user can easily press the two ends of the shoelace 4 into the rope groove 51 of the fixing seat 5 in an alternating manner (one up and one down).

[0024] After the strapping is completed, the flip cover 17 is closed. When the flip cover 17 is fastened to the fixed seat 5, under the action of the tensioning component (the repulsive force generated by the two permanent magnets C22 with the same magnetic poles), the slider 19 will automatically push the wedge-shaped locking block 20 into the slot 54 of the fixed seat 5, realizing the automatic locking of the flip cover 17 and ensuring the stability of the mechanism in the working state. At the same time, the pressing head 18 on the inner side of the flip cover 17 is inserted into the circular groove C91. The end of the pressing head 18 presses against the inclined surface of the wedge-shaped guide plate 16 connected to the inner end of the anti-slip locking block 14. Under the guidance of the inclined surface, the wedge-shaped guide plate 16 drives the anti-slip locking block 14 to overcome the magnetic attraction between the permanent magnet A13 and the permanent magnet B15, and slide outward synchronously along the radial direction of the disk 9 until its outer end extends out and is embedded in the annular gap formed by the outer arc surface of the disk 9 and the inner wall of the circular groove A52. At this time, the extended anti-slip block 14 will forcefully squeeze the shoelace 4 located in the rope groove 51 from the side, increasing the friction between the shoelace 4 and the inner wall of the rope groove 51.

[0025] At this point, the user can pull on both ends of the shoelace 4 to tighten the shoe upper. Since the direction of rotation of the two discs 9 is constrained by the steering limit assembly to allow only unidirectional free rotation, the working process is as follows: When the shoelace 4 is pulled in the tightening direction (i.e., pulling the end of the shoelace 4 from the end that passes through the cord groove 51 to the other end in the diagram), the shoelace 4 drives the discs 9 to rotate. The ratchet teeth 11 on the discs 9 rotate with the discs 9 and overcome the elasticity of the spring rod 10, sliding over the tooth surface of the fixed ratchet 8 that meshes with it ("slipping"). Therefore, the rotation of the discs 9 is unimpeded, and the shoelace 4 can be tightened smoothly. Once pulling stops or the shoelace 4 attempts to loosen in the opposite direction due to foot movement, the shoelace 4 will drive the discs 9 to attempt to rotate in the opposite direction. At this time, the spring rod 10 pushes the ratchet teeth 11 into and locks them in the tooth groove of the fixed ratchet 8, forming a reverse stop. The engagement of ratchet 8 and ratchet 11 transmits the reverse torque through disc 9 to the shoelace 4, which is pressed by anti-slip block 14, thus firmly locking the shoelace 4 and preventing it from slipping back and loosening, achieving the one-way self-locking function of the shoelace. The shoelace 4 can only be further tightened and cannot loosen on its own, ensuring the stability of the work shoes during wear.

[0026] When it is time to remove the shoes, the user slides the lever 21 again to overcome the repulsive force between the two permanent magnets C22, causing the wedge-shaped locking block 20 to disengage from the slot 54, thus opening the flip cover 17. After the flip cover 17 is opened, the squeezing pin 18 disengages from the circular groove C91, and the anti-slip locking block 14 immediately retracts inward under the magnetic attraction of the adsorption component, releasing the pressure on the shoelaces 4. At this time, the shoelaces 4 are in a completely relaxed and free state within the rope groove 51, no longer constrained by the disc 9 mechanism, allowing the shoelaces 4 to slide freely in both directions. The shoe upper opening 201 quickly loosens, and combined with the pull strap at the heel of the shoe upper 2, the foot can be easily pulled out of the shoe, achieving quick shoe removal.

[0027] Example 2, as follows Figures 2-4 As shown, the present invention proposes a pair of work shoes that are easy to put on and take off. Compared with the first embodiment, the rope groove 51 has anti-slip blocks 6 on both sides of the opening to prevent the shoelaces 4 from coming off from the inside. The anti-slip blocks 6 are flexible wedge-shaped blocks.

[0028] In this embodiment, the anti-detachment block 6 can prevent the shoelace 4 from coming off directly from the rope groove 51 when the flip cover 17 is opened, thereby avoiding the need to re-insert the shoelace 4 into the rope groove 51 every time you put on the shoes.

[0029] Example 3, such as Figure 2 and Figure 6 As shown, the present invention proposes a pair of work shoes that are easy to put on and take off. Compared with the first embodiment, a dust cover 23 is provided at the opening of the limiting groove. A limiting hole 24 is provided on the dust cover 23. A lever 21 is provided on the slider 19. The lever 21 passes through the limiting hole 24 and extends outward. When the lever 21 slides in the limiting hole 24, the slider 19 always closes the limiting hole 24.

[0030] In this embodiment, a dust cover 23 is provided to effectively prevent external mud and sand from entering the limiting groove, thereby avoiding obstruction of the sliding of the slider 19.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A type of work shoe that is easy to put on and take off, characterized in that, include: The sole (1) is provided with a matching upper (2), the upper (2) has an opening (201) at the instep, the upper (2) has a tongue (3) for closing the opening (201) from the inside, and a shoelace (4) is inserted into the opening (201) on the upper (2). Fixing seat (5) is set on the outer end face of the shoe tongue (3). The fixing seat (5) is provided with a rope groove (51) for the shoelace (4) to pass through. Two circular grooves A (52) are provided on the fixing seat (5) at intervals along the length direction of the rope groove (51). The circular grooves A (52) cut into the rope groove (51). The disk (9) includes two circular grooves A (52) that are coaxially arranged on the corresponding sides. The outer arc surface of the disk (9) and the inner wall of the circular groove A (52) are provided with an annular gap. The disk (9) is provided with a circular groove C (91) that is coaxial with it. Several anti-slip blocks (14) are arranged in a circular array around its axis on the arc surface of the disk (9). The ends of the anti-slip blocks (14) that are close to each other are inserted into the circular groove C (91). A steering limit assembly is provided on a fixed base (5) to limit the disc (9) to rotate freely only in the direction of the tightening of the shoelace (4); The adsorption component is disposed in the circular groove C (91) and is used to provide a magnetic attraction force to the anti-slip block (14) to retract it toward the axis of the disk (9); The flip cover (17) is rotatably mounted on the fixed base (5). A pushing component is provided on the flip cover (17). When the flip cover (17) and the fixed base (5) are closed, the pushing component pushes the anti-slip block (14) outward along the radial direction of the disc (9) into the annular gap. And a locking mechanism, which is provided on the flip cover (17) to keep the flip cover (17) and the fixed seat (5) in a closed state.

2. The work shoes that are easy to put on and take off according to claim 1, characterized in that, The heel of the shoe upper (2) is equipped with a lifting strap.

3. The work shoes that are easy to put on and take off according to claim 1, characterized in that, The opening of the rope groove (51) is provided with anti-slip blocks (6) on both sides to prevent the shoelaces (4) from coming off from the inside. The anti-slip blocks (6) are flexible wedge-shaped blocks.

4. The work shoes that are easy to put on and take off according to claim 1, characterized in that, The bottom surface of the circular groove A (52) is provided with a circular groove B (53) coaxial with it. The inner diameter of the circular groove B (53) is smaller than the inner diameter of the circular groove A (52). The disc (9) is inserted into the circular groove B (53) and rotates coaxially with it.

5. The work shoes that are easy to put on and take off according to claim 4, characterized in that, The steering limit assembly includes a fixed shaft (7), a ratchet (8), and a ratchet tooth (11). The fixed shaft (7) is coaxially disposed on the bottom surface of the circular groove B (53). The ratchet tooth (8) is coaxial with the fixed shaft (7) and fixedly connected. A spring rod (10) is disposed on the disc (9). The ratchet tooth (11) is connected to the movable end of the spring rod (10) and engages with the ratchet tooth (8) in one direction. The steering limit assembly is configured such that when the shoelace (4) is pulled in the direction of tightening the shoelace (4), the disc (9) drives the ratchet tooth (11) to overcome the elastic force of the spring rod (10), disengage from the ratchet tooth (8), and rotate freely.

6. The work shoes that are easy to put on and take off according to claim 1, characterized in that, The adsorption assembly includes permanent magnet A (13) and permanent magnet B (15). A frustum (12) is coaxially arranged on the bottom surface of the circular groove C (91). Several permanent magnets A (13) are arranged in a ring array on the arc surface of the frustum (12). Each permanent magnet B (15) is connected to one end of the circular groove C (91) by the anti-slip block (14) on the corresponding side. The permanent magnets A (13) and B (15) are aligned one-to-one. At the same time, the magnetic poles of the adjacent ends of each pair of permanent magnets A (13) and B (15) are opposite.

7. The work shoes that are easy to put on and take off according to claim 6, characterized in that, The pushing assembly includes a wedge guide plate (16) and an extrusion head (18). The number of wedge guide plates (16) is the same as the number of anti-slip blocks (14). Each wedge guide plate (16) is connected to one end of one of the anti-slip blocks (14) inserted into the circular groove C (91). The wedge guide plate (16) is located above the frustum (12). The extrusion head (18) is connected to the flip cover (17), and each extrusion head (18) is coaxial with the circular groove C (91) on the corresponding side. When the flip cover (17) is closed, the extrusion head (18) is inserted into the circular groove C (91) and extrudes the inclined surface of the wedge guide plate (16).

8. The work shoes that are easy to put on and take off according to claim 1, characterized in that, The locking mechanism includes a slot (54) on the fixed base (5), a wedge-shaped block (20) slidably disposed on the flip cover (17), and a tensioning assembly. A limiting groove is provided on the flip cover (17), and a slider (19) is provided in the limiting groove. One end of the wedge-shaped block (20) is inserted into the limiting groove and connected to the slider (19), and the other end is used to be inserted into the slot (54). The tensioning assembly includes two permanent magnets C (22). The two permanent magnets C (22) are respectively connected to the inner wall of the limiting groove and the end of the slider (19) away from the wedge-shaped block (20). The magnetic poles of the two permanent magnets C (22) are the same at the close ends to provide a repulsive force that makes the wedge-shaped block (20) tend to be inserted into the slot (54).

9. A pair of work shoes that are easy to put on and take off according to claim 8, characterized in that, A dust cover (23) is provided at the opening of the limiting groove. A limiting hole (24) is provided on the dust cover (23). A lever (21) is provided on the slider (19). The lever (21) passes through the limiting hole (24) and extends outward. While the lever (21) slides within the limiting hole (24), the slider (19) always closes the limiting hole (24).