A lacing device

Abstract

The present invention discloses a lacing device with fewer spare parts and simple and convenient assembly, which includes a base, a collar, a knob, a tape winding wheel. The collar has a ratchet ring meshing with a ratchet pawl wheel. The front end of the tape winding wheel has a recess, and a gear ring is in the recess. A clutch wheel is located in the recess. The clutch wheel has at least one elastic engaging portion that can engage with or disengage from the gear ring on the tape winding wheel. The ratchet pawl wheel has a guide rail for contracting or releasing the elastic engaging portion. A connecting member is provided on the clutch wheel to connect the knob so that the clutch wheel rotates synchronously with the knob. When the knob rotates in one direction, the elastic engaging portion on the clutch wheel engages with the tooth ring on the tape winding wheel, causing the knob, the ratchet pawl wheel, the clutch wheel, and the tape winding wheel to rotate and stop synchronously. When the knob rotates in the opposite direction, the elastic engaging portion on the clutch wheel disengages from the tooth ring on the tape winding wheel, and the tape winding wheel rotates freely.

Description

Technical Field

[0001] The present application relates to a lacing device for winding and relaxing a cord, such as a shoelace, in clothing, shoes, hats or daily necessities. Background Art

[0002] Lacing devices applied to clothing, shoes, hats or daily necessities are widely welcomed by consumers because they can quickly and conveniently wind and relax a cord, such as a shoelace. Their technical solutions also exist in a large number of patent documents, such as the lacing devices disclosed in CN105982392A, CN106572723A, CN104470394A, CN205585439U, CN205611924U, and CN206413842U. The structure of such lacing devices generally includes a base, a collar connected to the base, a winding wheel for winding the cord in the collar, a ratchet ring on the collar, a ratchet wheel connected to a knob meshing with the ratchet ring to make the knob rotate only in one direction, an axial gear connector between the winding wheel and the knob. When the knob is pressed down, the axial gear connector engages, and the winding wheel and the knob rotate synchronously. When the knob is rotated, the cord is wound in the winding wheel. When the knob is pulled up, the axial gear connector disengages, and the winding wheel can rotate freely, and the cord can be relaxed by pulling the cord. Since the lacing device is small in size, it requires a certain amount of force to pull out or press down the knob, which is not very convenient and sometimes even difficult.

[0003] In addition to the above-mentioned axial gear connector, the engagement method between the winding wheel and the knob also includes a radial gear connector. For example, the one-way non-rotating knob disclosed in CN105159393A has a one-way locking mechanism that installs a locking piece between the side wall of the knob cover and the ratchet sleeve, and controls the locking and unlocking of the counterclockwise rotation of the knob cover by pressing the locking piece. However, the locking piece is too small and difficult to press by hand. The cord retracting device disclosed in CN110921437A has a movable member provided on its rotating member, which is used to engage with the cord winding member when the rotating member rotates in the cord retracting direction, and solves the engagement and disengagement between the rotating member and the cord winding member radially. However, it has many parts, complex part production, cumbersome assembly, and high cost. The automatic shoelace tightening device disclosed in CN205432385U includes an outer cover, a rotating outer ring, a ratchet disc, a winding disc, a tooth ring base sleeved in sequence, and an elastic member provided on the ratchet disc. However, it has many parts, complex part production, cumbersome assembly, and high cost. The rope fast retracting and releasing device disclosed in CN213059713U realizes the engagement and disengagement between the winding wheel and the knob by providing convex teeth on the upper end surface of the winding wheel and clamping the control baffle on both sides of the convex teeth. However, it has many parts, complex part production, cumbersome assembly, and high cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a new lacing device with fewer parts and simple and convenient assembly.

[0005] The lace fastener of the present invention includes a base, a collar connected to the base, the collar having a through hole for threading a lace, and a rotatable knob located on the collar. There is a lace winding wheel for winding the lace in the collar, and a ratchet ring at the front end of the collar. The ratchet wheel meshes with the ratchet ring. It is characterized in that a recess is provided at the front end of the winding wheel, a gear ring is provided in the recess, a clutch wheel is located in the recess, and at least one elastic engaging portion capable of meshing with or disengaging from the gear ring on the winding wheel is provided on the clutch wheel. There is a guide rail on the ratchet wheel for contracting or releasing the elastic engaging portion, and a connecting member on the clutch wheel connects the knob so that the clutch wheel rotates synchronously with the knob. When the knob rotates in one direction, the elastic engaging portion on the clutch wheel meshes with the gear ring on the winding wheel, causing the knob, the ratchet wheel, the clutch wheel, and the winding wheel to rotate and stop synchronously. When the knob rotates in the opposite direction, the elastic engaging portion on the clutch wheel disengages from the gear ring on the winding wheel, and the winding wheel rotates freely.

[0006] Preferably, the elastic engaging portion includes an elastic arm and an engaging portion that meshes with or disengages from the gear ring on the winding wheel. A guide post is provided on the engaging portion, and the guide post is located in the guide rail of the ratchet wheel.

[0007] Preferably, there are limiting steps at the front end and the rear end of the guide rail, and the elastic force generated by the deformation of the elastic arm caused by the guide post located at the front end and the rear end of the guide rail pushes the guide post into the corresponding limiting steps.

[0008] Preferably, the gear ring is an internal gear located around the recess or an external gear protruding from the center of the recess.

[0009] Preferably, the connecting member on the clutch wheel is a cylinder at the center of the clutch wheel. There is a socket cavity in the center of the cylinder. The ratchet wheel has a through hole for the cylinder to pass through. There is a socket post matching the shape of the socket cavity in the middle below the knob, and the socket post is inserted into the socket cavity.

[0010] Preferably, there is at least one driving member on the knob, and there is a step on the ratchet wheel for docking with the driving member. When the knob rotates in the rotation direction of the ratchet wheel, the step on the ratchet wheel docks with the driving member of the ratchet wheel.

[0011] Preferably, the connecting member on the clutch wheel is at least two columnar bodies that are rotationally symmetric. There are socket holes matching the shape and position of the columnar bodies below the knob, and the columnar bodies are inserted into the socket holes. The ratchet wheel has corresponding channels for the columnar bodies to pass through. When the knob rotates in the rotation direction of the ratchet wheel, the columnar bodies abut against the end portions of the channels on the ratchet wheel, providing rotational torque to the ratchet wheel.

[0012] The present invention is convenient to use. When rotating forward, it can quickly wind up the tape. When rotating backward by an angle, the tape can be loosened, avoiding the inconvenience of using fingertips to turn out the knob. Since such products are all made of plastic materials and consume less materials, the manufacturing cost is mainly determined by the number of spare parts and the convenience of assembly. The present invention reduces the number of spare parts. The assembly process can be completed by sequentially sleeving and buckling the base - winding wheel - collar - clutch wheel - ratchet wheel - knob. Therefore, the assembly is simple and convenient, and the cost can be greatly reduced. Brief Description of the Drawings

[0013] Figure 1 It is a part drawing of an embodiment of the present invention.

[0014] Figure 2 It is Figure 1 Another - angle part drawing of

[0015] Figure 3 It is a diagram showing the cooperation state of the guide post and the guide rail when the clutch wheel and the winding wheel are engaged.

[0016] Figure 4 It is a diagram showing the cooperation state of the guide post and the guide rail when the clutch wheel and the winding wheel are disengaged.

[0017] Figure 5 It is a schematic diagram of the engagement state of the clutch wheel and the winding wheel.

[0018] Figure 6 It is a schematic diagram of the disengaged state of the clutch wheel and the winding wheel.

[0019] Figure 7 It is Figure 1 The appearance drawing of the assembled finished product of the embodiment

[0020] Figure 8 It is Figure 7 The central - axial sectional view of

[0021] Figure 9 It is a part drawing of the second embodiment of the present invention.

[0022] Figure 10 It is Figure 7 Another - angle part drawing of

[0023] Figure 11 The diagram showing the cooperation state of the guide post and the guide rail when the clutch wheel and the winding wheel of the second embodiment are engaged.

[0024] Figure 12 The diagram showing the cooperation state of the guide post and the guide rail when the clutch wheel and the winding wheel of the second embodiment are disengaged.

[0025] Reference Signs: 1, 101—base; 11, 12, 111, 112—thread through holes; 2, 102—tape winding wheel; 21, 121—through holes, 22, 122—recesses; 23, 123—gear rings; 3, 103—collar, 31, 32, 131, 132—through holes; 33, 133—thread through ears; 34, 134—ratchet rings; 4, 104—clutch wheel; 41, 141—elastic arms; 42, 142—meshing parts; 43, 143—guide posts; 44—hollow cylinder; 45—plug-in cavity; 144—columnar body; 146—annular body; 5, 105—pawl wheel; 51, 151—pawls; 52, 152—guide rails; 53, 153—limiting steps; 54, 154—limiting steps; 55, 155—through holes; 56, 156—steps; 6, 106—knob; 61—plug-in post; 62—driving part; 163—plug-in hole. Detailed Embodiment

[0026] Figure 1 — Figure 8 An embodiment of the lacing device of the present invention is shown. The lacing device includes a base 1, a tape winding wheel 2, a collar 3, a clutch wheel 4, a pawl wheel 5 and an upper knob 6. The collar 3 is connected to the base 1 through a snap-fit component that matches the base 1. The tape winding wheel 2 is located in the inner cavity of the collar 3 and is used for winding or releasing the tape. The tape winding wheel 2 is an I-shaped wheel, and there is a through hole 21 on its I-shaped wheel surface for passing the tape. There are several through holes 31, 32 on the barrel of the collar 3 for passing the tape. The tape can pass through the through hole 31 into the collar 3, through the through hole 21 of the tape winding wheel 2, and then out through the through hole 32 of the collar 3. Or the two ends of the tape respectively pass through the through hole 31 and the through hole 32 into the collar 3, and then pass through the through hole 21 and are knotted at the tape winding wheel 2. When the tape winding wheel 2 is rotated, the tape can be wound on the I-shaped wheel surface of the tape winding wheel 2, thereby tightening the tape. The base 1 or the collar 3 may also have several thread through ears 33 or thread through holes 11, 12 to facilitate fixing the base 1 of the lacing device on clothing, shoes and hats.

[0027] There is a recess 22 at the upper end of the tape winding wheel 2, and there is a gear ring 23 at the edge of the recess 22. The clutch wheel 4 is located in the recess 22. There are 3 rotationally symmetric elastic arms 41 on the clutch wheel 4. The end of the elastic arm 41 has a meshing part 42 that can mesh with the gear ring 23 on the tape winding wheel 2. There is a guide post 43 at the meshing part 42 of the elastic arm 41. There is a hollow cylinder 44 in the center of the clutch wheel 4. There is a polyhedron plug-in cavity 45 in the center of the cylinder 44. The cylinder 44 passes through the through hole 55 in the middle of the pawl wheel 5. There is a polyhedron plug-in post 61 with a shape matching the plug-in cavity 45 in the middle below the knob 6. The plug-in post 61 is inserted into the plug-in cavity 45, so that the clutch wheel 4 rotates synchronously with the knob 6.

[0028] A ratchet ring 34 is provided on the inner side of the upper end of the collar 3. The ratchet wheel 5 is located above the clutch wheel 4. The ratchet wheel 5 has three rotationally symmetrical ratchets 51 that mesh with the ratchet ring 34 so that the ratchet wheel 5 can rotate clockwise unidirectionally relative to the collar 3. There are three rotationally symmetrical guide rails 52 below the ratchet wheel 5. When the front end of the ratchet wheel 5 is away from the axis so that the guide post 43 is in this position, the meshing portion 42 meshes with the gear ring 23 on the belt winding wheel 2. When the rear end of the ratchet wheel 5 is close to the axis so that the guide post 43 is in this position, the meshing portion 42 is disengaged from the gear ring 23 on the belt winding wheel 2. There is a limiting step 53 ( Figure 3 , Figure 4 As shown in the figure, there is a limit step 54 on both sides of the rear end cavity of the guide rail 52, which is away from the axis. The guide post 43 of the clutch wheel 4 is located in the guide rail 52. When the knob 6 is turned clockwise to drive the clutch wheel 4 to rotate clockwise, the guide post 43 arrives at the front end of the guide rail 52 along the guide rail 52, and the meshing portion 42 meshes with the gear ring 23 of the belt winding wheel 2, so that the clutch wheel 4 and the belt winding wheel 2 are combined and rotated synchronously, and the centripetal elastic force generated by the radial outward bending deformation of the elastic arm 41 pushes the guide post 43 into the limit step 53, so that the ratchet wheel 5 and the clutch wheel 4 are combined and rotated synchronously. Since the guide post 43 needs to overcome the elastic force of the elastic arm 41 to loosen from the limit step 53 in the reverse direction, the combination of the guide post 43 and the limit step 53 can prevent the meshing portion 42 from loosening in the reverse direction, causing the wire belt wound by the belt winding wheel 2 to loosen. When a certain torque is applied counterclockwise to rotate the knob 6, the guide post 43 disengages from the limiting step 53 and moves to the rear end of the guide rail 52, and the meshing portion 42 disengages from the gear ring 23 of the belt winding wheel 2, so that the belt winding wheel 2 can rotate freely. The outward elastic force generated by the radial centripetal bending deformation of the elastic arm 41 pushes the guide post 43 into the limiting step 54. Since the guide post 43 needs to overcome the elastic force of the elastic arm 41 to reversely loosen from the limiting step 54, the combination of the guide post 43 and the limiting step 54 can prevent the meshing portion 42 from rebounding and jamming the gear ring 23, causing the belt winding wheel 2 to get stuck.

[0029] There may be three rotationally symmetrical driving members 62 below the knob 6, and the ratchet wheel 5 has a step 56 that docks with the driving members 62 (see Figure 3 , Figure 4 ). When the knob 6 is rotated clockwise, the driving member 62 abuts against the step 56, and the driving member 62 and the clutch wheel 4 drive the ratchet wheel 5 to rotate clockwise, and the driving member 62 provides an auxiliary rotational torque for the ratchet wheel 5.

[0030] When the knob 6 is rotated clockwise, the guide post 43 on the clutch wheel 4 advances along the guide rail 52 and enters the limit step 53, the clutch wheel 4 is combined with the ratchet wheel 5, and the engaging portion 42 on the clutch wheel 4 meshes with the gear ring 23 on the tape winding wheel 2 to combine the clutch wheel 4 with the tape winding wheel 2. At this time, the tape winding wheel 2, the clutch wheel 4, the ratchet wheel 5 and the knob 6 are combined together to rotate synchronously, and the tape winding wheel 2 winds up the thread tape; when the knob 6 stops rotating, the one-way locking function of the ratchet wheel 5 prevents the tape winding wheel 2 from rotating in the reverse direction, and the wound thread tape will not loosen; when the knob 6 is rotated counterclockwise with a certain force, since the ratchet wheel 5 cannot rotate in the reverse direction, the guide post 43 of the clutch wheel 4 leaves the limit step 53 of the ratchet wheel 5 and retreats along the guide rail 52 to the rear end of the guide rail 52 and enters the limit step 54, and the engaging portion 42 on the clutch wheel 4 disengages from the gear ring 23 on the tape winding wheel 2, and the tape winding wheel 2 can rotate freely, and the thread tape can be loosened by pulling the thread tape from the outside of the lacing device.

[0031] Figure 9 — Figure 12 Fig. shows another embodiment of the lacing device of the present invention, which includes a base 101, a tape winding wheel 102, a collar 103, a clutch wheel 104, a ratchet wheel 105 and an upper knob 106. The collar 103 is connected to the base 101 through a buckling component matching with the base 101. The tape winding wheel 102 is located in the inner cavity of the collar 103 and is used for winding or releasing the thread tape. The tape winding wheel 102 is an I-shaped wheel, and there is a through hole 121 for passing the thread tape on its I-shaped wheel surface. The barrel of the collar 103 has several through holes 131, 132 for passing the thread tape. The thread tape can pass through the through hole 131 into the collar 103, pass through the through hole 121 of the tape winding wheel 102, and then pass out through the through hole 132 of the collar 103, or the two ends of the thread tape respectively pass through the through hole 131 and the through hole 132 into the collar 103, and then pass through the through hole 121 and are knotted at the tape winding wheel 102. When the tape winding wheel 102 is rotated, the thread tape can be wound on the I-shaped wheel surface of the tape winding wheel 102, thereby tightening the thread tape. The base 101 or the collar 103 may also have several threading ears 133 or threading holes 111, 112 to facilitate fixing the base 101 of the lacing device on clothing, shoes and hats.

[0032] At the upper end of the belt pulley 102, there is a recess 122, and in the center of the recess 122, there is a protruding gear ring 123. The clutch wheel 104 is located in the recess 122. The clutch wheel 104 includes an annular body 146 and three rotationally symmetric elastic arms 141 extending towards the center. At the ends of the elastic arms 141, there are engaging portions 142 that can engage with or disengage from the gear ring 123 on the belt pulley 102. At the engaging portions 142 of the elastic arms 141, there are guide posts 143. The annular body 146 has three rotationally symmetric flat cylindrical bodies 144, and the cylindrical bodies 144 pass through the through holes 155 at corresponding positions of the ratchet wheel 105. Below the knob 106, there are three jacks 163 that match the shape and position of the flat cylindrical bodies 144. The flat cylindrical bodies 144 are inserted into the jacks 163, so that the clutch wheel 104 rotates synchronously with the knob 106.

[0033] On the inner side of the upper end of the collar 103, there is a ratchet ring 134. The ratchet wheel 105 is located above the clutch wheel 104. The ratchet wheel 105 has three rotationally symmetric pawls 151 that engage with the ratchet ring 134, enabling the ratchet wheel 105 to rotate unidirectionally clockwise relative to the collar 103. Below the ratchet wheel 105, there are three rotationally symmetric guide rails 152. When the front ends of the guide rails 152 are close to the axis and the guide posts 143 are located at this position, the engaging portions 142 engage with the gear ring 123 on the belt pulley 102. When the rear ends of the guide rails 152 are far from the axis and the guide posts 143 are located at this position, the engaging portions 142 disengage from the gear ring 23 on the belt pulley 2. On one side away from the axis on both sides of the cavity at the front end of the guide rail 152, there are limiting steps 153 ( Figure 11 、 Figure 12As shown, there are limiting steps 154 on the side closer to the axis on both sides of the rear cavity of the guide rail 152. The guide post 143 of the clutch wheel 104 is located in the guide rail 152. When the knob 106 is rotated clockwise to drive the clutch wheel 104 to rotate clockwise, the guide post 143 moves along the guide rail 152 to the front end of the guide rail 152, and the engaging portion 142 engages with the gear ring 123 of the tape winding wheel 102, so that the clutch wheel 104 and the tape winding wheel 102 are combined and rotate synchronously. The outward elastic force generated by the radial centripetal bending deformation of the elastic arm 141 pushes the guide post 143 into the limiting step 153, so that the ratchet wheel 105 and the clutch wheel 104 are combined and rotate synchronously. Since the guide post 143 needs to overcome the elastic force of the elastic arm 141 to loosen reversely from the limiting step 153, the combination of the guide post 143 and the limiting step 153 can prevent the engaging portion 142 from loosening reversely and causing the tape wound by the tape winding wheel 102 to come off. When a certain torsional force is applied counterclockwise to rotate the knob 106, the guide post 143 disengages from the limiting step 153 and moves to the rear end of the guide rail 152. The engaging portion 142 disengages from the gear ring 123 of the tape winding wheel 102, and the tape winding wheel 102 can rotate freely. The centripetal elastic force generated by the radial outward bending deformation of the elastic arm 141 pushes the guide post 143 into the limiting step 154. Since the guide post 143 needs to overcome the elastic force of the elastic arm 141 to loosen reversely from the limiting step 154, the combination of the guide post 143 and the limiting step 154 can prevent the engaging portion 142 from rebounding and jamming the gear ring 123, resulting in the phenomenon that the tape winding wheel 102 is jammed.

[0034] When the knob 106 is rotated clockwise, the guide post 143 on the clutch wheel 104 advances along the guide rail 152 and enters the limiting step 153. The clutch wheel 104 is combined with the ratchet wheel 105. The engaging portion 142 on the clutch wheel 104 engages with the gear ring 123 on the tape winding wheel 102 to combine the clutch wheel 104 and the tape winding wheel 102. At the same time, the flat columnar body 144 abuts against the step 156 of the through hole 155 of the ratchet wheel 105, providing an auxiliary driving torque for the ratchet wheel 105. At this time, the tape winding wheel 102, the clutch wheel 104, the ratchet wheel 105 and the knob 106 are combined and rotate synchronously, and the tape winding wheel 102 winds up the tape; when the knob 106 stops rotating, the one-way locking function of the ratchet wheel 105 makes the tape winding wheel 102 unable to rotate reversely, and the wound tape will not come off; when a certain force is applied to rotate the knob 106 counterclockwise, since the ratchet wheel 105 cannot rotate reversely, the guide post 143 of the clutch wheel 104 leaves the limiting step 153 of the ratchet wheel 105 and retreats along the guide rail 152 to the rear end of the guide rail 152 and enters the limiting step 154. The engaging portion 142 on the clutch wheel 104 disengages from the gear ring 123 on the tape winding wheel 102, and the tape winding wheel 102 can rotate freely. Pulling the tape from the outside of the tape tying device can loosen the tape.

Claims

1. A lacing device, comprising a base, a collar connected to the base, the collar having a through hole for threading a lace, and a rotatable knob located on the collar, the collar having a winding wheel for winding the lace, a ratchet ring at the front end of the collar, and a pawl wheel meshing with the ratchet ring, characterized in that, The front end of the belt winding wheel is provided with a recess, in which a gear ring is disposed, and a clutch wheel is located in the recess. The clutch wheel has at least one elastic meshing portion that can engage with or disengage from the gear ring on the belt winding wheel, and the ratchet wheel has a guide rail that contracts or releases the elastic meshing portion. The clutch wheel has a connecting piece that connects the knob to make the clutch wheel and the knob rotate synchronously. When the knob rotates in one direction, the elastic meshing portion on the clutch wheel engages with the gear ring on the belt winding wheel, so that the knob, the ratchet wheel, the clutch wheel and the belt winding wheel rotate and stop synchronously. When the knob rotates in the opposite direction, the elastic meshing portion on the clutch wheel disengages from the gear ring on the belt winding wheel, and the belt winding wheel rotates freely.

2. The lacing device according to claim 1, wherein, The elastic meshing portion comprises an elastic arm and a meshing portion that meshes with or disengages from the gear ring on the belt winding wheel. The meshing portion is provided with a guide column, which is located in the guide track of the ratchet wheel.

3. The lacing device according to claim 2, wherein The front end and the rear end of the guide rail are respectively provided with limiting steps. The guide posts are located at the front end and the rear end of the guide rail, and the elastic force generated by the deformation of the elastic arms pushes the guide posts into the corresponding limiting steps.

4. The lacing device according to any one of claims 1-3, characterized in that, The gear ring is an internal gear located at the periphery of the recess or an external gear protruding from the center of the recess.

5. The lacing device according to any one of claims 1-3, characterized in that, The connecting piece on the clutch wheel is a cylinder at the center of the clutch wheel, the center of the cylinder has a plug-in cavity, the ratchet wheel has a through hole for the cylinder to pass through, and the middle part below the knob has a plug-in post that matches the shape of the plug-in cavity, and the plug-in post is inserted into the plug-in cavity.

6. The lacing device according to claim 5, wherein The knob has at least one driving member, and the ratchet wheel has a step that interfaces with the driving member. When the knob rotates in the direction of rotation of the ratchet wheel, the step on the ratchet wheel interfaces with the driving member of the ratchet wheel.

7. Any of the lacing devices according to claims 1-3, characterized in that, The connecting piece on the clutch wheel is at least two rotationally symmetrical cylinders, and there is a socket below the knob that matches the shape and position of the cylinder. The cylinder is inserted into the socket, and the ratchet wheel has a corresponding channel for the cylinder to pass through. When the knob is rotated in the direction of rotation of the ratchet wheel, the cylinder contacts the end of the channel on the ratchet wheel, providing rotational torque to the ratchet wheel.

Images