KR101707484B1 - apparatus for fastening wire - Google Patents

Abstract

The present invention provides an apparatus for fastening a wire, capable of improving productivity and durability through simple assembling properties in a simple structure. According to the present invention, the apparatus includes a winding base part, a cam base part, a cam driving part, a lifting cam part, and a cover part. The winding base part includes a bottom portion having an upper surface with a receiving groove, a reel part allowing the wire to be selectively wound therearound when the wire is inserted into the receiving groove to be rotated, a housing part having a lower end fixed into the receiving groove and having a ratchet-type gear formed along the inner circumferential surface thereof. The cam base part is provided in opposition to the ratchet-type gear, and inserted into the housing part, and has a through hole on a central portion thereof. The cam driving part is mounted on the upper end of the housing part, and coupled to the cam base part at a preset angle such that the cam driving part is rotatably separated from the cam base part. The cam driving part has a slide protrusion inclined downward in one direction along an inner circumferential surface of the lifting hole formed in the central portion thereof corresponding to the communication hole. The lifting cam part includes a lifting body part and an elastic blade part. The lifting body part is provided in the lifting hole and has a lifting protrusion to slide along the slide protrusion to be lifted. When the lifting body part is moved down, the lifting body part passes through the communication hole and is coupled to the reel part such that the lifting body part is rotated together with the reel part. The elastic blade part is provided at an end portion thereof with a ratchet engagement part, so that one-directional rotation of the elastic blade part is restricted by the ratchet-type gear. The cover part is rotatably coupled to the upper end of the housing part and rotated together with the cam driving part.

Description

[0001] Apparatus for fastening wire [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire tightening apparatus, and more particularly, to a wire tightening apparatus which is improved in productivity and durability by simple structure and easy assembly.

In general, shoes such as athletic shoes are provided so that the shoelace is connected in a zigzag fashion so as to be in close contact with the user's foot size. By tightening the shoelace by pulling it, the adhesion between the shoe and the user's foot is enhanced to enable comfortable walking.

However, in the case of young children or elderly people who are in the lower grades of elementary school or elementary school, loosening their shoelaces is not easy, and in the case of athletes such as climbing and cycling, If the knot or the knot is loosened by an intense movement or by an external object, the loosening of the shoelace must be absolutely prevented, since undesirable results such as recording degradation and occurrence of safety accidents are caused.

In addition, when resting during a workout, the shoe strap can be easily restored only when the tightened shoelace can be easily loosened. Most preferably, the shoelace can be easily tightened and the shoe strap can be tightly maintained. .

In order to facilitate the tightening and loosening of the shoelaces which are contradictory to each other, many devices have been developed which can easily tighten the shoelace.

1 is an exploded perspective view of a conventional shoelace tightening device.

1, a conventional shoelace tightening device 1 includes a housing portion 7, a reel portion 6, a gear portion 5, a cam portion 4, a cam driving portion 3, a cover portion 2, .

The housing part 7 houses a reel part 6 on which a shoelace is wound and the gear part 5 is coupled to the upper end of the housing part 7 so as to be constrained in one direction. The cam portion 4 is disposed in the hollow interior of the gear portion 5 and the cam driving portion 3 is disposed at the upper end portion of the gear portion 5.

At this time, a drive projection inserted into the cam portion 4 is provided on the lower surface of the cam driving portion 3, and the cover portion 2 is coupled to the upper end of the cam driving portion 3.

The cam portion 4 is lifted and lowered in the hollow portion in accordance with the rotation direction of the cover portion 2 and the reel portion 6 and the cam portion 4 are integrally rotated when the cam portion 4 is lowered, The reel unit 6 can freely rotate independently of the cam unit 4 during the rise of the cam 4.

At this time, when the cover part 2 is rotated in the other direction in a state where the reel part 6 and the cam part 4 are integrally rotated, the wire is wound on the reel part 6, The wire wound on the wire 6 can be pulled out.

However, in order to raise and lower the cam portion 4 in accordance with the rotation direction of the cover portion 2, the driving protrusion of the cam portion 4 and the cam protrusion of the cam portion 4, And a helical protrusion such as an inner hollow of the gear portion 5 coupled thereto and a spiral groove portion corresponding thereto are required.

As a result, an expensive mold is required for injection of each component, and a separate cutting process is added to the product. This increases the production cost of the product and deteriorates the productivity of the product.

Korean Patent No. 10-0715441

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a wire tightening device which is improved in productivity and durability by simple structure and easy assembly.

According to an aspect of the present invention, there is provided a connector comprising: a bottom portion having a receiving groove formed in a top surface thereof; a reel portion rotatably inserted in the receiving groove to selectively wind the wire upon rotation; A winding base portion including a housing portion having a ratchet type gear formed along its inner periphery; A cam base portion inserted into the housing portion so as to be opposed to the ratchet gear and having a communication hole formed at a central portion thereof; And a cam protrusion which is seated on an upper end portion of the housing portion and is detachably coupled to the cam base portion at a predetermined clearance angle so as to be slidable downwardly in one direction on an inner circumference of an elevation hole formed at a central portion thereof corresponding to the communication hole, ; A lifting body portion which is disposed in the lifting hole and slides along the slide projection on the outer periphery and which is lifted and lowered and is coupled to the lifting body through the communication hole to be rotated integrally with the reel when lifted; An elevating cam portion including an elastic wing portion to which rotation of the ratchet gear is restricted in one-directional rotation; And a cover portion rotatably coupled to an upper end portion of the housing portion and rotated integrally with the cam driving portion.

Here, the lifting body and the elastic wing are connected by elastic pieces so that the lifting body is lifted in a state where the elastic wing is fixed, and a wing support protrusion supporting the upper surface of the elastic wing is attached to the lower surface of the cover And the cam base portion is provided with a support hole into which a support protrusion protruding from the lower surface of the elastic wing portion is inserted. A guide bar for guiding the guide protrusion protruding from the outer circumference of the lift body is formed on the rim of the communication hole. .

Further, the lower surface of the cover portion and the upper surface of the lifting body portion are engaged with each other when the lifting body portion is lifted up, and are slid upwardly in the other direction so as to be mutually slid when the cover portion is rotated in the other direction, Are preferably provided in multiple stages along the circumferential direction.

The cam driving unit is provided with a temporary groove at a radially outer side of the slide projection, and a rim of the cam base unit is inserted into the temporary fixed groove and fixed to the rim of the cam base, It is preferable that the permanent wing portion is detached from the tongue groove so as to be restrained in the other direction rotation and is elastically deformed radially outwardly.

A hook protrusion extending in the circumferential direction is formed on the outer circumference of the housing part so that the first hook protrusion protruding from the side wall part of the cover part is hooked and rotated, and a lower end part of the housing part is hooked to the receiving groove, A hook protrusion may be formed on the upper surface of the cam driving unit and a hook engaging wing portion protruding from the upper surface of the cam base may be hooked to the upper surface of the cam driving unit.

Through the above solution, the present invention provides the following effects.

First, since the assembling process of the product can be completed only by a simple hook joining process in which the adjacent two components are pressed in the vertical direction, a separate fastening means such as a screw is unnecessary, Breakage of the resin component can be prevented, and the durability of the product can be improved.

Second, unlike the prior art in which a complicated processing step or an expensive mold is required using a spiral groove / protrusion structure, the structure for interlocking up and down movement of the lifting body during rotation of the cover part includes a slide projection and a lift projection, Since the gears are simplified in the form of gears such as a slide gear groove and a slide gear, the manufacturing cost can be reduced and productivity of the product can be improved.

Third, since a guide bar for guiding the guide protrusion is provided in the cam base portion whose one-directional rotation is restricted by the elastic wing portion, the elevating body portion is vertically raised and lowered based on the fixed position through the elastic wing portion, And the torsional rotation between the elastic wings can be prevented, so that breakage of the elastic pieces can be minimized and the durability of the product can be improved.

Fourth, since the lowering state of the lifting body is fixed as the temporary wing portion of the cam base is elastically inserted into the fixed groove of the cam driving portion, malfunction such as lifting of the lifting body due to vibration and impact is prevented, And safety accidents caused thereby can be prevented and the safety of the product can be improved.

1 is an exploded perspective view of a conventional shoelace tightening device.
FIG. 2A and FIG. 2B are exploded perspective views showing a wire fastening apparatus according to an embodiment of the present invention;
3 is a cross-sectional view illustrating a wire fastening apparatus according to an embodiment of the present invention.
4A and 4B are sectional views of a wire fastening device according to an embodiment of the present invention, with reference to the positions of slide protrusions and lift protrusions.
FIG. 5 is an exemplary view showing a state in which a slide gear protrusion and a slide gear groove are engaged when a lifting body of a wire lifting body is lifted in a wire tightening apparatus according to an embodiment of the present invention; FIG.

Hereinafter, a wire tightening apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view illustrating a wire fastening apparatus according to an embodiment of the present invention. FIGS. 4A and 4B are cross-sectional views illustrating a wire fastening apparatus according to an embodiment of the present invention. FIG. 5 is a cross-sectional view of a wire fastening device according to an embodiment of the present invention, in which the slide fastener and the slide fastener of FIG. And Fig.

2A to 5, the wire fastening apparatus 100 includes a winding base unit 10, a cam base unit 40, a cam driving unit 50, an elevating cam unit 60, and a cover unit 70, .

Here, the winding base 10 includes a bottom portion 10c, a reel portion 10b, and a housing portion 10a. The winding base portion 10 is a base assembly fixed on a sock of a shoe to wind a wire.

In detail, the bottom portion 10c is preferably made of a resin material such as reinforced plastic, which is a light and elastic material having a certain strength or more.

At this time, the bottom portion 10c is provided with a hearth support portion 17b having an additional rounded shape so as to be adhered to the sulphone or the like of the shoe, and a receiving groove 17a at one side of the upper surface portion of the hearth support portion 17b And a watertight partition wall portion 17d protruded to be formed.

A through-hole 17e is formed in the receiving partition wall 17d so as to communicate with the inside of the receiving groove 17a.

2A to 3, the reel unit 10b is preferably made of a resin material such as reinforced plastic. The reel unit 10b is provided to have an outer diameter smaller than the inner diameter of the accommodation partition wall 17d, ).

At this time, the rotation support protrusion 17c protruding from the center of the bottom surface of the receiving groove 17a is inserted into the protrusion receiving groove 16c formed at the center of the lower surface of the reel unit 10b, (17c) can be accurately rotated by the rotation axis.

A ring-shaped wire retracting groove 16a recessed radially inward is formed on a peripheral surface of the reel unit 10b and a wire fixing hole 16b is provided in the wire retracting groove 16a.

In detail, the wires may be drawn through the wire through holes 17e of the housing partition wall 17d and connected to the objects to be fastened such as shoes, while the wires are fixed to the wire fixing holes 16b.

At this time, when the reel unit 10b is rotated in the other direction (CR), the wire can be wound around the wire winding groove 16a. When the reel unit 10b is rotated in one direction (R) And can be released from the groove 16a.

Of course, the direction in which the wire is wound and unwound can be easily changed by reversing the shape of each component to be described below.

When the reel part 10b is inserted into the receiving groove 17a of the bottom part 10c and the wire is fixed to the reel part 10b, the housing part 10a is formed on the upper part of the receiving groove 17a .

It is preferable that the housing part 10a is made of a resin such as reinforced plastic and the side wall part of the housing part 10a has an outer diameter smaller than the inner diameter of the accommodation partitions 17d, ) Having an inner diameter exceeding the outer diameter of the cylinder.

The lower end of the side wall of the housing part 10a is inserted into the space between the reel part 10b and the accommodation wall part 17d and fixed to the receiving groove 17a.

At this time, a second hook projection 12a is formed on the outer periphery of the lower end portion of the side wall of the housing portion 10a, and a coupling groove portion 12b recessed radially outward is formed on the inner surface of the accommodation partition wall portion 17d.

Here, the second hook protrusion 12a and the coupling groove 12b may be formed in pairs corresponding to each other. That is, the second hook protrusion 12a and the coupling groove 12b may be formed so as to be opposed to each other on both sides of the housing portion 10a and the accommodation partition wall portion 17d.

At this time, elastic force imparting grooves 12c are formed on both sides of at least one of the second hook protrusions 12a, and a side wall portion 12d of the housing portion 10a corresponding to the elastic force imparting grooves 12c has a radius The second hook protrusion 12a can be smoothly inserted into the interior of the accommodation wall portion 17d.

Specifically, the lower end of the second hook projection 12a is inclined upward toward the radially outward side so that the side wall portion 12d of the housing portion 10a is elastically deformed radially inward when the housing portion 10a contacts the housing partition wall 17d .

The second hook protrusion 12a is inserted into the coupling groove 12b so that the second hook protrusion 12a is engaged with the upper end of the coupling groove 12b when the side wall 12d of the housing 10a is elastically restored radially outwardly. And the upper end is provided flat.

An assembly guide portion 13a is formed on the outer circumference of the side wall portion of the housing portion 10a to be inserted into and detained from the assembly guide groove 13b formed in the inner circumferential upper end portion of the accommodation partition wall portion 17d. Accordingly, the hooked housing portion 10a can be stably fixed to the inside of the receiving groove 17a without flowing in the circumferential direction.

A ratchet type gear 15 is formed along the circumferential direction on the inner periphery of the upper portion of the sidewall of the housing part 10a. At this time, the ratchet type gear 15 is provided with a plurality of gyri in which the end in the other direction (CR, clockwise in FIG. 2A) is provided as a vertical surface and the end in one direction (R, counterclockwise in FIG. .

The cam base 40 is made of a resin material such as reinforced plastic. The cam base 40 has an outer diameter corresponding to the inner diameter of the radially inner end of the ratchet gear 15, and a communication hole 40a is formed at the center thereof And it is preferably provided as a disc-shaped member.

At this time, a support step 14 is formed on the inner circumference of the housing part 10a so as to have an inner diameter less than the outer diameter of the cam base part 40 along the lower end of the ratchet gear 15, 40 may be seated on the upper end of the support step 14 and inserted into the housing part 10a so as to be opposed to the ratchet gear 15. [

The central portion of the top surface of the reel unit 10b may face the bottom surface of the lift cam portion 60 disposed on the upper portion of the cam base portion 40 through the communication hole 40a.

The upper surface of the cam base 40 is provided with hook engagement wings 43 for elastically deforming radially inwardly and outwardly along the outer circumference of the upper surface of the cam base 40, The third hook projection 43a projects.

The cam driving unit 50 is provided with a lift hole 50a corresponding to the communication hole 40a at a central portion thereof and an inner peripheral portion of the lift hole 50a is expanded radially outwardly, 50b, and is made of a resin material such as reinforced plastic.

The outer diameter of the cam driving part 50 is larger than the inner diameter of the housing part 10a but less than the inner diameter of the side wall part 70a of the cover part 70 and seated on the upper end of the housing part 10a .

At this time, the upper surface of the cam driving part 50 on the side of the wing penetration part 50b is preferably formed with a recessed hook groove part 53 to which the third hook protrusion 43a is hooked.

In detail, when the cam base portion 40 is inserted into the housing portion 10a and mounted on the support step 14, the cam driving portion 50 is seated on the upper end of the housing portion 10a.

At this time, the hook coupling wing portion 43 may protrude from the upper surface portion of the cam base portion 40 to a length exceeding the upper end of the housing portion 10a, and may be inserted into the wing penetrating portion 50b have.

The third hook projection 43a projects radially outward from the outer surface of the hook coupling wing 43 so as to extend beyond the inner periphery of the wing penetration portion 50b side of the cam driving portion 50. [

The upper end of the third hook projection 43a is inclined upward toward the radially inward direction so that when the hook engaging wing portion 43 contacts the inner circumference of the wing penetrating portion 50b side of the cam driving portion 50, It can be elastically deformed inward in the direction.

When the third hook protrusion 43a is inserted into the clearance hook groove portion 53, the hook coupling wing portion 43 is elastically restored to the outside in the radial direction, and the flat bottom surface portion of the third hook protrusion 43a And is engaged with the clearance hook groove portion 53.

At this time, the clearance hook groove portion 53 is formed to be larger than the circumferential width of the third hook projection 43a, and is separated in different directions in a state where the cam driving portion 50 and the cam base portion 40 are engaged Can be rotated.

That is, the cam base unit 40 and the cam driving unit 50 are preferably arranged to be separated and rotated at a predetermined clearance angle of about 28 degrees, and the clearance hook groove unit 53 is provided at the third hook protrusion 43a In the circumferential direction from the circumferential width corresponding to the clearance angle.

A slide protrusion 51 is formed on the inner circumference of the lifting hole 50a so as to be inclined downward in one direction R.

That is, the slide protrusion 51 is protruded radially inwardly from the inner periphery of the lift hole 50a, and the one end R of the slide protrusion 51 is inclined downward toward the one direction R.

At this time, the slide protrusions 51 may be formed in a shape of a right triangle having an acute angle formed in a lower end portion in one direction (R) in a direction of a radial direction outwardly viewed from the radial direction.

Meanwhile, the elevating cam portion 60 is preferably made of a resin material such as reinforced plastic, and includes an elevating body portion 60a and an elastic wing portion 60b.

Here, the lifting body 60a is a block having a circular cross section having an outer diameter less than the inner diameter corresponding to the radially inner end of the slide protrusion 51 protruding from the inner circumference of the lifting hole 50a and having a predetermined thickness And can be disposed in the lift hole 50a.

An elevating protrusion 61, which slopes upwards in the other direction CR, protrudes from the outer periphery of the lifting body 60a.

That is, the elevation protrusion 61 is formed on the outer periphery of the elevation body 60a so as to have a rotation locus overlapping the slide projection 51 in a state where the elevation body 60a is inserted into the elevation hole 50a And the end of the other side CR is inclined upwards toward the other side CR.

At this time, the elevation protrusion 61 may have a shape of a right triangle in which a cross section in a radially outwardly inward direction is formed with an acute angle in an upper end portion in the other direction (CR).

In addition, it is preferable that the slide protrusion 51 is provided with the auxiliary slide protrusion 51a in one direction (R).

A space corresponding to the elevation protrusion 61 is formed between the auxiliary slide protrusion 51a and the slide protrusion 51. The elevation protrusion 61a is formed by the elevation protrusion 61, The upper portion of the cam driving unit 50 may be inserted into the lift hole 50a.

The other side (CR) side end of the auxiliary slide protrusion 51a and the one-direction (R) side end of the elevation projection 61 are preferably flat in the vertical direction.

Accordingly, when the cam driving unit 50 rotates in the other direction R, the other side CR side end of the auxiliary slide projection 51a presses the one end R side end of the elevation projection 61, The lifting body portion 60a may be rotated together with the cam driving portion 50 in the other direction CR.

At this time, an auxiliary lifting protrusion 61a having the same shape as that of the lifting and descending protrusion 61 may be provided in one direction R of the lifting protrusion 61, and the one-direction (R) side end of the auxiliary sliding protrusion 51a It is preferable that the auxiliary lifting projection 61 is rounded so that the slant surface on the other side CR is slidable.

The lifting protrusion 61 and the auxiliary lifting protrusion 61a may be disposed to face each other on one side and the other side of the lifting body 60a. It is preferable that the guide rails 51a are arranged to be opposed to one side and the other side of the inner circumference of the lift hole 50a so as to correspond to the lift projection 61 and the auxiliary lift projection 61a.

At this time, when the cam driving part 50 is rotated in one direction R from the lifting body 60a, the slant surface on the one-direction (R) end side of the slide projection 51 and the slant surface on the other side And the elevation protrusion 61 can be slid along the slope of the slide projection 51 to be elevated.

Further, it is preferable that a gear fitting portion 68 is provided on a lower surface of the lifting body portion 60a.

The gear fitting portion 68 is provided with a plurality of teeth inclined upwards in a direction toward the one direction R of the end portion in the one direction R, 10b are provided with a gear engagement portion 18 of a staggered shape which is formed with the gear engagement portion 68.

In detail, when the lifting body portion 60a is lowered, the gear fitting portion 68 penetrates through the communication hole 40a and is engaged with the gear engaging portion 18.

At this time, the vertical side of the gear fitting portion 68 in the other direction (CR) is in contact with the vertical side in the one direction (R) end side of the gear engagement portion 18, And can be transmitted to the reel unit 10b, and the lifting body 60a and the reel unit 10b can be integrally rotated in the other direction (CR).

The lowered state of the lifting body portion 60a is engaged with the gear fitting portion 68 and the gear engaging portion 18 so that the lifting protrusion 61 and the slide protrusion 51 interfere with each other It is preferable to understand that the term " a "

When the lifting body 60a is lifted, the gear fitting portion 68 and the gear engaging portion 18 are separated and the reel 10b can be separated from the lifting body 60a and freely rotated .

On the other hand, an S-shaped elastic piece 60c is provided on the outer periphery of the lifting body 60a and is extended in one direction R and rounded in the other direction CR and extended in one direction R again.

At this time, the elastic wings 60b are connected to the ends of the elastic pieces 60c and disposed radially outward of the lifting body 60a, and are arranged to be inclined radially outwardly in the one direction R.

The elastic wing portion 60b is disposed to face the ratchet gear 15 through the wing penetration portion 50b and to be engaged with the ratchet gear 15 at the one- A ratchet-shaped latching portion 65 is provided.

At this time, in a state where the elastic wing portion 60b is elastically supported radially outward by the elastic piece 60c, the vertical cross section of the ratchet engaging portion 65 and the ratchet gear 15 is engaged, One-direction (R) rotation of the portion 60b can be restrained.

When the elastic wing portion 60b is rotated in the other direction (CR), the inclined surfaces of the ratchet engaging portion 65 and the ratchet gear 15 slide in contact with each other and the elastic wing portion 60b is radially inwardly and outwardly The ratchet engagement portion 65 can be slid in the other direction CR along the ratchet type gear 15 in a state in which a clicking feeling is imparted.

Here, the elastic wings 60b and the wing penetrations 50b may be formed of at least one pair corresponding to each other. The elastic wings 60b and the elastic wings 60b may be formed on one side and the other side of the vertical portion 60a, And a wing penetration part 50b may be formed on one side and the other side of the lift hole 50a.

A support protrusion 66 is formed on the bottom surface of the elastic wing portion 60b on the other side in the direction R to be inserted into the support hole 46 formed in the cam base portion 40. [

At this time, the elastic wings 60b are urged by the elastic piece 60c connected to the other end in the direction of the other side R so that the ratchet engaging portion 65 at the one- And can be elastically rotated radially inward and outward.

Thus, the engaging and restraining between the ratchet-shaped engagement portion 65 and the ratchet-type gear 15 and the shift of the slide movement state can be accurately performed.

It is preferable that a guide protrusion 62 is formed on the outer circumference of the lifting body 60a at a portion of the lifting protrusion 61 to the connection portion of the elastic piece 60c on the side of the lifting body 60a.

The guide protrusions 62 are protruded radially outwardly from the outer circumferential surface of the lifting body 60a so that the guide protrusions 62 are formed to have flat ends in the one direction R and the other direction CR, , It is preferable that the cross section in the direction from the radially outer side to the inner side is provided in a rectangular shape.

A pair of guide bars 42 spaced from each other in the circumferential direction of the guide protrusions 62 are formed on the rim of the communication hole 40a in the cam base 40. The guide protrusions 62 Is inserted into the space between the guide bars 42.

Meanwhile, the cover 70 is preferably made of a resin material such as reinforced plastic, and is rotatably coupled to the upper end of the housing part 10a. At this time, the cover part 70 may be provided in a container shape enclosing the upper outer surface of the housing part 10a, and may be rotated by the user in one direction (R) and another direction (CR).

A first hook protrusion 71 protrudes from the inner circumference of the side wall 70a of the cover 70 and a first hook protrusion 71 engages with the outer circumference of the side wall of the housing 10a. It is preferable that the jaw 11 is formed.

At this time, the first hook protrusion 71 is provided with an upward inclination as the lower end is radially inward, and the upper end is flat. The hook protrusion 11 is inclined downward toward the outer side in the radial direction, .

That is, when the cover 70 is downwardly pressed to cover the upper end of the housing part 10a, the lower end of the first hook projection 71 slides in contact with the upper end of the hooking step 11, 70 are elastically deformed outward in the radial direction.

When the first hook protrusion 71 passes the hooking protrusion 11, the side wall portion 70a of the cover portion 70 is elastically restored radially inwardly, and the upper end of the first hook protrusion 71 The cover portion 70 and the housing portion 10a can be hooked to each other by engaging with the lower end of the latching jaw 11.

The first hook protrusion 71 is provided on the inner surface of the side wall portion 70a of the cover portion 70 along the same height range. The hook protrusion 11 is provided in the circumferential direction of the housing portion 10a And the cover 70 can be rotated in a state that the cover 70 is hooked to the housing 10a.

Since the component parts such as the bottom part 10c, the housing part 10a, and the cover part 70 are assembled through a simple hook joining process of vertically pressing two adjacent parts, the productivity of the product can be improved have.

Furthermore, since all the components can be assembled without a separate metallic fixing means such as a screw, the damage of the resin component due to the metallic parts used as the fixing means during the operation through the external force can be prevented from the original, Can be improved.

A restraining protrusion 72 protrudes from the inner circumferential upper end of the side wall 70a corresponding to the first hook protrusion 71 of the cover 70. Preferably, the cam driving portion 50 has a recessed recessed portion 52 recessed radially inwardly to correspond to the recessed protrusion 72.

The cover portion 70 is coupled to the upper end of the housing portion 10a while the cam driving portion 50 is seated and the first hook projection 71 passes through the restraining groove portion 52 And can be hooked to the latching jaw (11).

At this time, the upper surface of the cam driving part 50 is supported by the bottom edge of the cover part 70, and when the locking protrusion 72 is inserted into the locking groove part 52, the cover part 70 And the cam driving unit 50 may be integrally rotated.

The lower portion of the cover portion 70 is engaged with the lower portion of the cover portion 70 and the upper surface portion of the elastic wing portion 50b in the hooked state of the cover portion 70 and the housing portion 10a, The wing support protrusion 74 protrudes in a length corresponding to the interval between the wing support protrusions.

At this time, the elastic wing portion 50b is supported by the wing support protrusions 74 so that the elastic protrusion 66 can be stably maintained in the elastic rotation state through the support hole 46. [

2A to 4A, when the lifting body 60a is lowered, the lifting protrusion 61 is inserted into the space between the slide protrusion 51 and the auxiliary slide protrusion 51a.

At this time, the vertical surface on the one-direction (R) end side of the lifting projection 61 is in contact with the vertical surface on the side of the other side (CR) of the auxiliary slide protrusion 51a, (R) end side of the slide projection (51).

When the cover portion 70 is rotated in the other direction (CR), the cam driving portion 50, the elevating cam portion 60, the cam base portion 40 and the reel portion 10b are integrally rotated, .

In detail, the rotational force of the cover CR in the other direction is transmitted to the cam driving part 50 through the restricting protrusion 72 and the restricting recess part 52, and the auxiliary slide protrusion 51a and the elevating protrusion 61 To the elevating cam portion 60 through the opening /

At this time, since the gear fitting portion 68 of the lifting body portion 60a and the gear engaging portion 18 of the reel portion 10b are engaged with each other, the reel portion 10b is rotated in the other direction (CR) .

Here, the elastic wings 60b may slide along the ratchet gear 15 and be rotated in the other direction CR together with the lifting body 60a.

Since the ratchet engaging portion 65 and the ratchet type gear 15 are engaged with each other, rotation of the up / down cam portion 60 in one direction (R) can be restricted, and the reel portion 10b can be rotated in one direction R) rotation is applied, unidirectional rotation of the reel unit 10b is limited by the elevation cam portion 60 in which the one-directional (R) rotation is restrained, so that the wire is not loosened.

The elevating cam portion 60 is rotated integrally with the cam base portion 40 through the guide protrusion 62, the guide bar 42, the support protrusion 66, and the cam support hole 46.

Referring to FIGS. 2A and 2B, it is preferable that a temporary wing portion 49 is provided on the rim of the cam base portion 40.

More specifically, the cam base portion 40 is formed with a temporary fixed blade groove 49b recessed radially inwardly along one side of the rim, and the fixed blade portion 49 is integrally formed with one side of the temporary fixed blade groove 49b (CR) side from the end surface of the second substrate (R).

At this time, the end portion on the other side (CR) side of the temporary fixed blade portion (49) can elastically flow radially inward and outward with respect to the one side (R) side end portion of the temporary fixed blade portion (49) The inner side surface of the end portion in the direction (CR) is provided so as to protrude radially inward.

The cam driving portion 50 is formed with a temporary fixing groove 59 at the radially outer portion of the slide projection 51 at which the inner side projection of the end portion of the temporary fixing blade 49 in the other direction CR is inserted .

That is, the lifting body 60a is lowered so that the one end R of the lifting protrusion 61 and the other end CR of the auxiliary slide protrusion 51a are in contact with each other, The other end CR side end portion of the temporary fixing blade 49 is inserted into the temporary fixing groove 59 in a state where the other end CR and the one end R of the slide projection 51 are in contact with each other .

At this time, the end of the temporary fixing blade 49 on the other side CR is elastically hooked on the side crest 59a of the temporary fixing groove 59 and the cam driving part 50 (R) rotation through the elastic wing portion 60b can be fixed to the cam base portion 40 to which the rotation is restrained.

That is, when a unidirectional (R) rotational force less than the elastic force of the permanent wing portion 49 is applied to the cover portion 70 and the cam driving portion 50, the temporary wing portion (R) rotation of the cover portion (70) to the cam driving portion (50) is restricted by the cam portion (49).

When a one-directional (R) rotational force greater than the elastic force of the stationary blade portion 49 is applied to the cover portion 70, the end portion of the stationary blade portion 49 in the other direction (CR) And the cam driving portion 50 can be rotated in the one direction (R) from the cam base portion 40.

3 to 4B, when the cover unit 70 is rotated in the one direction R in a state where the lifting body 60a is lowered, the cam driving unit 50 moves the lifting body 60a (R).

Since the elevating body portion 60a is in a state in which the one direction R is confined by the cam base portion 40 and the elastic wing portion 60b, The slide protrusion 51 is inserted.

Accordingly, the slanting surface on the side of the other end CR of the slanting projection 61 slides along the slanting surface on the side of the one end R of the slide protrusion 51 so that the slanting body 60a can be lifted up .

In detail, the elastic wing portion 60b is supported downward by the wing support protrusions 74 so that the elastic wing portion 60b can be stably restrained to the ratchet type gear 15 without upward and downward flows.

In the upper surface of the elastic blade portion 60b, a bending protrusion 64 inclined radially inward toward the one direction R is formed.

At this time, when the cover portion 70 is rotated in one direction (R), the inner surface of the engagement protrusion 64 is pressed by the wing support protrusion 74 so that the elastic wing portion 60b is supported radially outward And the restraining force against the ratchet type gear 15 can be further increased.

The lifting body portion 60a is connected to the elastic wing portion 60b by an elastic piece 60c so that the elastic wing portion 60b can be deformed in a state where the elastic wing portion 60b is fixed, Lt; / RTI >

At this time, the cam base portion 40 is limited in the one-directional (R) rotation by the elastic wings 60b and can guide the lifting and lowering direction of the guide protrusion 62 through the space between the guide bars 42 have.

It is preferable that the guide bar 42 is extended to cover the height range of the lifting body 60a in which the gear engaging portion 18 is separated from the gear engaging portion 68 and the freely rotatable reel 10b is rotatable.

That is, as the guide protrusion 62 is guided and moved along the space between the guide bars 42 of the cam base portion 40 limited in one-directional (R) rotation, the lifting body portion 60a is guided by the elastic wings And can be vertically raised with respect to the fixed position through the opening 60b.

Accordingly, since the twist rotation between the lifting body 60a and the elastic wing 60b is prevented, damage due to excessive deformation of the elastic piece 60c can be minimized.

2B and 5, the upper surface portion of the lifting body portion 60a and the lower surface portion of the cover portion 70 are provided with a slide gear groove (not shown) (67) and a slide gear projection (77) are provided in multiple stages.

The slide gear groove 67 may be formed on one of the upper surface of the lifting body 60a and the lower surface of the cover 70 and the slide gear protrusion 77 may be provided on the other side .

That is, it is preferable that the slide gear groove 67 is formed on the upper face portion of the ascending / descending body portion 60a having a predetermined thickness and the slide gear projection 77 is stuck on the lower face portion of the cover portion 70, The projections can also be reversed.

More specifically, the slide gear groove 67 and the slide gear protrusion 77 are provided with a vertical section in which the opposed portions of the cover portion 70 facing each other when the cover portion 70 is rotated in one direction (R) CR), it is preferable that the opposite facing portions are inclined upwards toward the other direction CR.

That is, the slide gear groove 67 is formed as an inclined surface which is inclined upward as the inner surface of the other side CR is tilted toward the other direction CR and the inner surface of the one direction R is a vertical surface, 77 are formed such that their end portions in the other direction CR are inclined upward toward the other direction and the end portions in the one direction R are provided flat in the vertical direction.

At this time, when the cover portion 70 is rotated in one direction and the lifting body portion 60a is raised, the upper surface portion of the lifting body portion 60a is close to the bottom portion of the cover portion 70, The slide gear protrusion 77 is engaged with the inside of the gear groove 67.

When the lifting body 60a is lifted up to a freely rotatable height, the flat end of the slide gear protrusion 77 abuts against the vertical surface of the slide gear groove 67 so that the cover 70 Is restricted in one direction (R) rotation.

It is preferable that the height of the guide protrusion 51 and the slide protrusion 61 exceeds the engagement height of the gear engaging portion 68 and the gear engaging portion 18, And the width of the slide gear protrusion 77 may correspond to the width of the guide protrusion 51 and the slide protrusion 61.

That is, when the cam driving portion 50 or the cover portion 70 is rotated in the one direction (R) at the widthwise angle from the elevating body portion 60a, the elevating body portion 60a is raised, R, the lifting body 60a may be lowered when the rotated cam driving unit 50 or the cover unit 70 is further rotated in the other direction CR by a widthwise angle.

At this time, the disengaged state and the engaged state between the gear fitting portion 68 of the lifting body portion 60a and the gear engaging portion 18 of the reel portion 10b can be switched, and the width angle is less than the clearance angle .

When the lifting body portion 60a is lifted to a height at which the engagement between the gear fitting portion 68 and the gear engagement portion 18 is released, the slide gear groove 67 and the slide gear projection 77 (R) rotation of the cover portion (70) to the cam driving portion (50) is restricted.

Accordingly, the state in which the reel unit 10b can freely rotate can be easily detected through the one-direction (R) rotation restriction of the cover unit 70. [

When the lower end face of the slide protrusion 61 is seated on the upper face of the guide protrusion 51 so that the engagement between the gear fitting portion 68 and the gear engaging portion 18 is released, The lower end face of the slide protrusion 61 is not completely separated from the upper end face of the guide protrusion 51 and the downward movement of the lifting body portion 60a due to the rotation of the cover portion 70 in the other direction Can be achieved smoothly.

At this time, when the cover portion 70 is rotated in one direction R so that the lifting body portion 60a is lifted up, the stepped portion 59a of the cam driving portion 50 is moved to the inner side surface of the temporary fixed blade portion 49 So that the cover 70 can be rotated in one direction (R), and the wire can be easily pulled out in a state where the reel unit 10b freely rotates.

When the step portion 59a of the cam driving portion 50 is disposed on the inner side surface of the temporary fixed wing portion 49, the temporary fixed wing portion 49 elastically flows outward in the radial direction, The other end CR of the wing portion 49 is urged toward the ratchet gear 15 and the other rotation of the cam base 40 is released by the ratchet gear 15 .

When the cover unit 70 is subjected to a rotational force in the opposite direction (CR) beyond the elastic force of the temporary fixed blade unit 49, the cam base unit 40 rotates in the other direction of the lifting body 60a CR), the cover portion 70 can be rotated in the other direction (CR) from the lifting body portion 60a.

At this time, the slant surface of the slide gear protrusion 77 on the other side CR presses the slant surface on the other side CR side of the slide gear groove 67, and the lift body 60a can be lowered.

The lifting body portion 60a is lowered to a height at which the cover portion 70 and the cam driving portion 50 are rotated in the other direction CR to engage with the gear fitting portion 68 and the gear engaging portion 18 The inner surface side projection of the end portion of the stationary blade portion 49 in the other direction (CR) is inserted into the temporary fixed groove (59).

At this time, the temporary fixed blade portion 49 is elastically restored radially inwardly to be spaced apart from the ratchet gear 15, and the rotation restriction of the other direction (CR) of the cam base portion 40 is released, 70 and the cam driving portion 50, the elevating cam portion 60 and the cam base portion 40 are integrally rotated in the other direction (CR) so that the wire can be wound.

In this way, the cover 70 can be rotated in the other direction to tighten the wire. If the cover 70 is rotated in one direction at a predetermined angle, the lifting body 60a is lifted, The usability of the product can be improved.

Unlike the prior art in which a complicated processing step or an expensive mold is required using a spiral groove / projecting structure component, the structure for the up / down movement of the lifting body portion 60a during the rotation of the cover portion 70 is inclined The slide protrusions 51 and the lift protrusions 61 and the slide gear recesses 67 and the slide gear protrusions 77. The productivity of the product can be improved by reducing the process cost.

The descending state of the ascending / descending body 60a is determined by the fact that as the temporary fixed wing portion 49 provided in the cam base 40 is inserted into the fixed groove 59 of the cam driving portion 50, So that malfunctioning of the lifting body 60a due to a motion shock rather than a direct operation by a user is prevented. Therefore, unexpected wire loosening and safety accidents due to this are prevented, and safety of the product can be improved.

At the same time, due to the slide movement through the inclined surface contact between the gear-shaped members such as the slide gear groove 67 and the slide gear protrusion 77, the slide protrusion 51 and the lift protrusion 61, So that the durability of the product can be improved since the malfunction due to the lowering of the elasticity can be prevented unlike the conventional method using the elastic force of the elastic member.

Of course, the wire fastening apparatus 100 according to the present invention is not limited to being used only for shoes, but may be applied to a plurality of apparatuses for tightening other straps and may be used for other apparatuses to which the technical idea of the present invention is applied And the scope of the present invention is also covered by the scope of the present invention.

As described above, the present invention is not limited to the above-described embodiments, and variations and modifications may be made by those skilled in the art without departing from the scope of the present invention. And such modifications are within the scope of the present invention.

100: wire fastening device 10: winding base part
40: cam base part 50: cam driving part
60: lift cam portion 70: cover portion

Claims (5)

And a housing portion having a lower end portion fixed to the receiving groove and having a ratchet gear formed along the inner periphery thereof, A winding base portion;
A cam base portion inserted into the housing portion so as to be opposed to the ratchet gear and having a communication hole formed at a central portion thereof;
And a cam protrusion which is seated on an upper end portion of the housing portion and is detachably coupled to the cam base portion at a predetermined clearance angle so as to be slidable downwardly in one direction on an inner circumference of an elevation hole formed at a central portion thereof corresponding to the communication hole, ;
A lifting body portion which is disposed in the lifting hole and slides along the slide projection on the outer periphery and which is lifted and lowered and is coupled to the lifting body through the communication hole to be rotated integrally with the reel when lifted; An elevating cam portion including an elastic wing portion to which rotation of the ratchet gear is restricted in one direction; And
And a cover portion rotatably coupled to an upper end portion of the housing portion and rotated integrally with the cam driving portion. The method according to claim 1,
The elevating body portion and the elastic wing portion are connected by an elastic piece so that the elevating body portion is raised in a state where the elastic wing portion is fixed,
A wing support protrusion for supporting an upper surface portion of the elastic wing portion protrudes from the lower surface of the cover portion,
A guide hole for guiding the elevation of the guide protrusion protruding from the outer periphery of the lifting body is provided at the rim of the communication hole, Wire tightening device. The method according to claim 1,
The slide protrusions and the slide gear grooves are inclined upwardly in the other direction so that the cover portions are slidably engaged with each other when the cover portion is rotated in the other direction, Wherein the plurality of wires are provided along the direction of the wire. The method according to claim 1,
A cam groove is formed in a radially outer portion of the slide projection in the cam driving portion,
The cam base portion is detached from the tongue groove so as to be rotatable in the other direction on the ratchet gear when the cam driving portion is rotated in one direction, and the tongue is deformed radially outwardly Wherein the fastening portion is provided with a stationary wing portion. The method according to claim 1,
A locking protrusion extending in the circumferential direction is formed on the outer circumference of the housing part so that the first hook protrusion protruding from the side wall part of the cover part is hooked and rotated,
A second hook protrusion hooked to the receiving groove is formed at a lower end of the housing portion,
Wherein the upper surface portion of the cam driving portion is formed with a hooking hook portion extending in the circumferential direction so as to correspond to the opening angle of the hook coupling wing portion protruding from the upper surface portion of the cam base portion.

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