KR101839798B1 - Reel system for tightening wire - Google Patents

Abstract

The present invention relates to a reel system for tightening a wire. The system includes: a housing (10) including a plurality of gates and a single direction protrusion; a spool (20) comprising a winding part including a centric tunnel and first and second eccentric tunnels and a plurality of rotation making protrusions formed on the upper surface of an upper plate; a winder (30) including an axial rotation protrusion combined with or separated from the rotation making protrusions of the spool; a latchet (40) including a latchet protrusion combined with the single direction protrusion; a dial (50) axially rotated in one direction along with the latchet; and a button (60) connected to the winder to be elevated along with the winder. Accordingly, since the system includes the spool winding the wire, the winder combined with or separated from the spool, the dial rotating the spool axially, the latchet rotating the dial axially in a wire tightening direction, and the button making the spool and the winder combined or separated, if the spool and the winder are interlocked with each other through the button, the wire is able to be only tightened, but if the spool and the winder are separated, the wire is able to be unwound, and thus, the system is capable of making the wire smoothly wound and unwound through a simple manipulation of the button as well as enabling components to be assembled without an extra combiner, thereby making wire winding work quick and easy while reducing time for assembly.

Description

REEL SYSTEM FOR TIGHTENING WIRE [0001]

The present invention relates to a reel system for wire harnesses, and more particularly, to a wire reeling reel system which includes a spool for winding wire, a winder for engaging with and spacing apart from the spool, a dial for rotating the spool about one axis, A ratchet for rotating the spool and a button for engaging or separating the spool and the winder. When the spool and the winder are engaged with each other through this button, only the wire can be tightened. If the spool and the winder are separated from each other, And more particularly to a reel system for wire harnesses.

Generally, it is common that a string of a shoe or the like (a wire) is manually bound by a wearer. Recently, there are various reel systems for tying a string by using a dial method because there is a problem that it is inconvenient if it is tied up by such a hand.

For example, the reel system of the prior art will be schematically described as follows.

The reel system of the prior art comprises a housing, a reel including a spool supported by the housing, and a knob supported by the housing, the assembly of which is assembled with a fastener such as a separate small screw, So that the cable is collected in the channel formed in the spool when the spool is rotated in the first direction with respect to the housing and the cable is sufficiently discharged from the spool when the spool is rotated in the second direction with respect to the housing.

However, such a conventional reel system has a problem in that when the cable is rotated, the spool rotates in the first direction, and when the cable is released, the spool rotates in the second direction. The cable is also rotated in the releasing direction of the cable, so that the cable may be loosened by an external force.

Further, in order to unscrew the cable from the spool, the whole knob must be lifted, and in order to wind the knob, it is necessary to press the knob as a whole.

In addition, there is a disadvantage in that the amount of rotation of the spool must be large in order to form a loop structure in which the cable is only closed to one side from the center of the reel assembly,

In addition, since a fastener is used for assembling parts, a separate tool for fastening the fastener is required, which makes it necessary to prepare a tool at the time of assembling parts, and since the fastener has a small size, There is a problem in that a special tool corresponding to the tool is required.

Korean Patent Publication No. 2012-0027105 Korean Patent Publication No. 2013-0040141 Korea Patent Publication No. 2013-0100238 Korean Patent Publication No. 2016-0021431 Korean Patent Publication No. 2013-0103298 Korean Patent Publication No. 2016-0027989 Korean Patent Publication No. 2016-0042081 Japanese Patent Application No. 2015-297 Japanese Patent Application Laid-Open No. 2016-47259

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve these problems, and it is an object of the present invention to provide a spool for winding a wire, a winder for engaging and disengaging the spool, a dial for pivoting the spool, And a button for allowing the spool and the winder to be engaged with or separated from each other. When the spool and the winder are engaged with each other through the button, the wire can be tightened only. When the spool and the winder are separated from each other, It is an object of the present invention to provide a wire reeling reel system which can smoothly wind and unwind a wire by a simple operation of a button and can assemble parts without any fastening parts.

It is also an object of the present invention to provide various types of tightening systems by allowing a cable to form a closed loop structure in one or both directions from the center of the reel assembly.

Another object is to provide a wire reeling reel system that allows the cable to reach a tightened state with only a small amount of rotation of the spool when the cable forms two closed loop structures at the center of the reel assembly.

 Another object of the present invention is to provide a wire reeling reel system which allows the first and second eccentric tunnels of the spool to be vertically spaced so that the wire is wound in two rows in the vertical direction so as not to cause lifting between the wires during winding.

According to an aspect of the present invention, there is provided a wire guiding reel system including a bottom surface and a plurality of gates extending upwardly from the bottom surface and passing through the inside and outside of the outer circumferential surface, A housing having a fence formed therein; A plurality of rotation-inducing protrusions are provided on the upper surface of the upper plate, a plurality of rotation-inducing protrusions are provided on the upper surface of the upper plate, ; A spindle disposed above the spool and being vertically lifted and lowered to be spaced apart from and engaged with the spur protrusion of the spool; A ratchet having a ratchet portion provided with a ratchet protrusion engaging with the unidirectional protrusion of the housing and having an outer connecting body having an inner peripheral surface in a polygonal shape; A through hole having an inner connecting body formed on an outer circumferential surface of the outer connecting body of the ratchet and engaging with and engaging with a polygonal face of the outer connecting body of the ratchet and having a groove and a step continuous along the inner circumferential surface, A dial integrally rotatable unidirectionally with the ratchet in a covered state; And a button provided in the through hole of the dial and connected to the winder and vertically elevated and lowered integrally with the elevation protrusion which is rotated and elevated while being alternately hooked to the step and the groove on the outer circumferential surface.

Further, in the wire-guiding reel system according to an embodiment of the present invention, the housing may further include a fixing plate extending outward from the lower end of the fence to fix the housing to the object.

Further, in the wire reeling method according to an embodiment of the present invention, the rotation inducing protrusions of the spool may be continuous along the upper surface rim of the upper plate of the spool, and have the inclined surfaces and the facing surfaces, respectively.

Further, in the reel system for wire guiding according to an embodiment of the present invention, the lower plate of the spool is provided with a wire portion to be exposed to the outside of the gate when the spool is assembled to the housing in a state where the wire is wound around the winding portion, In order to prevent the wire from being caught, the wire may be provided with an indentation preventing groove recessed inward so as to be positioned inside.

Further, in the wire guiding reel system according to an embodiment of the present invention, the winding unit may be provided with a stopper at the rear end of the wire and the rear end of the first and second eccentric tunnels in the inserting direction, And the rear portion exposed to the outside of the eccentric tunnel is pulled in the same direction as the inserting direction so that the wire and the rear end of each wire are fixed in the eccentric tunnel.

The first and second eccentric tunnels are shifted up and down with respect to the center tunnel, respectively, so that the two diameters of the first and second eccentric tunnels are different from each other, The wire may be formed to have the same height as the vertical height of the winding section so that the wire is wound up by two rows in the vertical direction when the wire is wound on the winding section.

In addition, in the wire rehabilitation reel system according to an embodiment of the present invention, the shaft rotation protrusions of the winder are continuous along the bottom edge of the winder and have inclined surfaces corresponding to the inclined surfaces of the spool, The button may be pivoted in the axial rotation direction during the downward sliding operation so that the button is rotated by a predetermined angle.

Further, in the wire reeling reel system according to an embodiment of the present invention, a spring may be further provided between the spool and the winder such that the winder is elastically lifted and lowered.

Further, in the wire reeling reel system according to the embodiment of the present invention, the engaging groove is provided at the center of the upper surface of the winder so that the winder and the button are integrally joined, and the engaging projection May be formed.

Further, in the wire reeling reel system according to an embodiment of the present invention, in order to prevent the winder and the buttons from being idle, a plurality of engaging jaws And a plurality of engagement protrusions may be provided on the edge of the engagement protrusion of the button corresponding to the engagement protrusion.

In addition, in the wire reaming reel system according to an embodiment of the present invention, the ratchet portion may include a ratchet projection having one end connected to the outer connector and the other end having a free end structure, Lt; / RTI >

In addition, in the wire reeling reel system according to an embodiment of the present invention, a release preventing jaw is provided on the outer circumferential surface of the upper end of the fence of the housing, and in the state of being hooked on the lower end of the inner circumferential surface of the dial, Preventing projection may be formed so as to be rotatable.

As described above, the wire reaming reel system of the present invention comprises a spool for winding a wire, a winder for engaging with and separating from the spool, a dial for rotating the spool about its axis, and a dial for rotating the spool only in one direction And a button for allowing the spool and the winder to be engaged with or separated from each other. When the spool and the winder are engaged with each other through the button, the wire can be tightened only. If the spool and the winder are separated from each other, This makes it possible to smoothly take up and unwind the wire by the simple operation of the button, and also assemble the parts without any fastening parts. As a result, the winding work of the wire is quick and easy, .

Further, since the first and second eccentric tunnels of the spool are vertically spaced apart to allow the wires to be wound in two rows in the vertical direction, lifting is not generated between the wires at the time of winding so that a large amount of wires can be aligned and wound Effect is obtained.

1 is a perspective view illustrating a wire reeling reel system according to an embodiment of the present invention.
2 is an exploded perspective view illustrating a wire reeling reel system according to an embodiment of the present invention.
3 is a bottom exploded perspective view illustrating a wire reeling reel system according to an embodiment of the present invention.
4 is a front exploded view showing a wire reaming reel system according to an embodiment of the present invention.
5 is a cross-sectional view illustrating a wire reeling reel system according to an embodiment of the present invention.
6 is a schematic flowchart showing a button operation process of a reel system for wire guiding according to an embodiment of the present invention.
7 to 10 are schematic flow diagrams showing a method of bundling wires using a wire reeling system according to an embodiment of the present invention.
11 is a perspective view showing application of a rearranging reel system of the present invention to golf shoes.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 to 10, a wire reaming reel system according to an embodiment of the present invention includes a housing 10, a spool 20, a winder 30, a ratchet 40, (50) and a button (60).

The housing 10 includes a bottom surface 11 and a plurality of gates 12a extending upwardly from the bottom surface 11 and penetrating the inside and outside of the outer circumferential surface, and a unidirectional protrusion 12b formed continuously along the top surface A fence 12 having a circular tube shape is provided.

The housing 10 is extended from a lower end of the fence 12 to a fixed plate for fixing the housing 10 in various ways such as adhesion to an object (for example, (13) are provided.

The spool 20 is mounted on the bottom surface 11 of the housing 10 and is surrounded by the fence 12 and has a small diameter structure between the large diameter upper and lower plates 21 and 22, A winding section 23 having first and second eccentric tunnels 23b and 23c is provided and a plurality of rotation inducing protrusions 21a are formed on the upper surface of the upper plate 21. [

The rotation inducing protrusions 21a of the spool 20 are continuous along the upper end edge of the upper plate 21 of the spool 20 and have a sloped surface 21a1 and a facing surface 21a2.

The lower plate 22 of the spool 20 is connected to the wire 12 to be exposed to the outside of the gate 12a when the spool 20 is assembled to the housing 10 in a state that the wire 5 is wound around the take- (22a) is recessed inwardly so that the wire (5) is located inside to prevent the portion of the wire (5) from being caught between the lower plate (22) and the inner circumferential surface of the fence (12) A plurality of them are provided correspondingly.

The winding section 23 is provided with stoppers 23b1 and 23c1 at the rear ends of the wire 5 and rear ends of the first and second eccentric tunnels 23b and 23c in the inserting direction of the wire 5, The rear portion of the wire 5 is pulled in the same direction as the inserting direction and is exposed to the outside of the eccentric tunnel 23b, 23c in a state where the rear end portion of the wire 5 is inserted and stopped by the stoppers 23b1, Line and the rear end are fixed within the eccentric tunnel 23b, 23c.

Here, the first and second eccentric tunnels 23b and 23c are arranged in such a manner that when the wire 5 is pulled in a state in which the wire and the rear end of the wire 5 are caught by the stoppers 23b1 and 23c1 and stopped at a predetermined position, The widening angle between the wire and the rear end of the wire 5 inside the eccentric tunnels 23b and 23c and the rear portion of the wire 5 exposed to the outside is made large so that the bent portion of the wire 5 is inserted into the eccentric tunnels 23b and 23c The wire 5 can be prevented from being released to the outside of the eccentric tunnels 23b and 23c by pulling the wire 5 in a state where the wire 5 is hooked on the right corner corner.

The first and second eccentric tunnels 23b and 23c are vertically shifted with respect to the center tunnel 23a so that the two diameters of the first and second eccentric tunnels 23b and 23c are equal to the length 23 so that when the wire 5 is wound on the winding portion 23, the wire 5 wound in a state of being wound up by two rows in the upper and lower portions of the winding portion 23 So that the state of being released from the tightening state due to collapse, that is, loosening does not occur.

The winder 30 is disposed above the spool 20 and is lifted up and down according to the operation of the button 60 to be spaced apart and engaged with the rotation inducing projections 21a of the spool 20, An axis rotation projection 31 is provided on the bottom surface to rotate the angle shaft.

The shaft rotation protrusion 31 of the winder 30 is provided along the bottom edge of the winder 30 and has an inclined surface 31a corresponding to the inclined surface 21a1 of the spool 20, The button 60 is pivoted by a certain angle while being pushed in the axial rotation direction in a process of sliding downward along the slope 21a1 of the button 60. [

The ratchet 40 includes a ratchet portion 41 having a ratchet projection 41a engaged with the unidirectional protrusion 12b of the housing 10 and a ratchet portion 41 connected to the outer circumferential surface of the ratchet portion 41a, 42 are provided.

Here, the ratchet portion 41 is structured such that one end thereof is connected to the outer connector 42 and the other end thereof is a free-end structure, and the ratchet projection 41a protrudes downward on the bottom surface thereof.

The dial 50 has a polygonal surface 51a formed on the outer circumferential surface of which the polygonal surface 42a of the outer connector 42 of the ratchet 40 is engaged and engages with the inner circumferential surface of the dial 50, A through hole 52 is formed through the center of the inner joint body 51 and the upper end of the inner joint body 51 is connected to the lower end of the housing 50, And is rotated integrally with the ratchet 40 in one direction.

The button 60 is disposed on the through hole 52 of the dial 50 and connected to the winder 30 so that the button 60 is integrally lifted and lowered and the outer circumferential surface is alternately provided with the groove 51b and the step 51c A plurality of lifting and lowering projections 61 are provided which are axially rotated and lifted and lowered while being hooked.

Here, the elevation projection 61 is inserted into the step 51c and the groove 51b in the dial 50 recessed inward and engaged with each other.

A spring 70 is provided between the spool 20 and the winder 30 so that the winder 30 is elastically lifted and lowered.

An engaging groove 32 is formed at the center of the upper surface of the winder 30 so that the winder 30 and the button 60 are integrally coupled to each other. The engaging protrusions 62 protruding from the engaging projections 62 are formed.

In order to prevent the winder 30 and the button 60 from being idle, a plurality of engagement protrusions 33 spaced apart from each other along the rim of the engagement groove 32 of the winder 30 And a plurality of latching protrusions 63 are inserted in the edge of the latching protrusion 62 of the button 60 corresponding to the latching protrusion 62 and inserted between the latching latches 33.

A release bump 14 is provided on an outer circumferential surface of the upper end of the fence 12 of the housing 10 and the dial 13 is hooked on the lower end of the inner circumferential surface of the dial 50, 50 are rotatably formed on the outer circumferential surface thereof. Although not shown, a plurality of gaps may be formed such that the lower end of the dial 50 is elastically spread and gathered to elastically lock the dial 50 to the housing 10.

Hereinafter, the operation of the wire reaming reel system according to the present invention will be described.

7, the distal end portion of the wire 5 is passed through the center tunnel 23a of the spool 20 and then the distal end portion of the wire 5 passing through the center tunnel 23a is inserted into the first The tip end portion of the wire 5 passed through the outside of the first gate 12a1 is passed through from the outside to the inside of the second gate 12a2 after penetrating from the inside to the outside of the gate 12a1, The distal end portion of the wire 5 passed through the inside of the two gates 12a2 is passed through the center tunnel 23a of the spool 20 so as to face the reverse direction of the rear end of the wire 5.

8, the rear end of the wire 5 is rotated by a half turn so that the wire 5 forms a semicircle outside the spool 20, The distal end of the wire 5 is inserted into the first eccentric tunnel 23b and the rear end portion of the wire 5 is inserted into the first eccentric tunnel 23b through the tunnel 23a to face the opposite end of the wire 5, And inserted into the second eccentric tunnel 23c.

9, the wires of the respective wires 5 exposed to the outside via the center tunnel 23a are pulled in the same direction as the insertion direction and the rear portions of the rear ends of the wires 5 are pulled out of the wires 5 And the rear end of the wire 5 is hooked into the eccentric tunnels 23b and 23c so that the wire and the rear end of the wire 5 inserted into the eccentric tunnels 23b and 23c are fixed within the respective eccentric tunnels 23b and 23c Then, the semicircle is formed, and the wire 5 penetrated into the center tunnel 23a is pulled so that the semicircular portion is wound on the winding portion 23 of the spool 20. [

10, the spool 20 is seated on the bottom surface 11 of the housing 10 so that the wire and the rear end of the wire 5 are respectively engaged with the first and second eccentric portions of the spool 20, The remaining wire 5 is fixed to the tunnels 23b and 23c and exposed to the outside of the housing 10 through the first and second gates 12a1 and 12a2 of the fence 12 to form a circular shape .

In order to prevent the portion of the wire 5 to be exposed to the outside of the gate 12a from being caught between the lower plate 22 and the inner circumferential surface of the fence 12 when the spool 20 is assembled to the housing 10, The spool 20 is assembled to the housing 10 in a state where the spool 20 is inserted into the engaging groove 22a (see Figs. 2 and 3).

Thus, the operation of binding the wire 5 through the housing 10 and the spool 20 is completed.

Then, the winder 30, the ratchet 40, the dial 50 and the button 60 assembly are disposed above the spool 20 and assembled with the housing 10.

The ratchet 40 is engaged with the dial 50 and the winder 30 is connected to the button 60 and the button 60 is engaged with the grooves 51b and the step 51c of the dial 50, And as a result, when the dial 50 is rotated, the winder 30 is also rotated at the same time.

The operation of the reel system thus completed is as follows. First, the fixing plate 13 of the housing 10 is fixed to the object (such as a shoe), and the wire 5 is hooked on a hook (not shown) The shaft 60 is pressed downward and the elevation projection 61 is positioned at the step 51c so that the shaft rotation projection 31 of the winder 30 and the rotation projection projection 21a of the spool 20 can be rotated, When the dial 50 is rotated at this time, the spool 20 is rotated while the ratchet projection 41a of the ratchet 40 is rotated in one direction along the unidirectional projection 12b of the housing 10, Are wound on the winding section 23 in two rows in the vertical direction so that the wire 5 is tightened.

Here, even if the wire 5 is pulled in the direction opposite to the reel system, the ratchet projection 41a engages with the unidirectional protrusion 12b and does not rotate in the reverse direction, so that the wire 5 is kept in a tight state without being released .

When the wire 5 is to be unfastened, the button 60 is pressed so that the lifting protrusion 61 is moved from the step 51c to the adjacent groove 51b so that the winder 30 and the spool 20 ).

When the button 60 is pressed downward, the winder 30 is also lowered so that the inclined surface 61b of the shaft rotation protrusion 31 The elevating protrusion 61a is axially rotated as a result of being moved at a predetermined angle in the shaft rotating direction while sliding down the slant surface 21a1 of the spool 20 (see FIG. 6).

When the wire 5 is pulled out from the outside, the spool 20 with which the winder 30 is disengaged is freely rotated, and the wire 5 is loosened while the shaft 5 is rotated.

Although the above description has been made on the case where one loop structure is provided in one direction using the reel system of the present invention, it is also possible to have two loop structures in both directions.

The wire (cable, cord) used in the present invention can be very smoothly reduced with a high coefficient of friction or with a modulus of elasticity and high tensile strength. In some cases, the cable can be multiple strands of interwoven material. Any suitable string may be used, but nylon fibers or strings formed from polyethylene fibers may be used. One example of a suitable string material is sold under the trade name SPECTRA. Polyethylene fibers having a high polymerization degree (long chain extension) at the time of polymerization advantageously have a high strength to weight ratio, excellent durability and very low elasticity. The preferred strap made of this material is woven tightly. A tightly woven string adds rigidity to the finished string. The added stiffness provided in the woven increases the pushing performance and the strap is easily threaded through the strap guide and inserted into the spool or through the guide to form a loop of strap that the user can easily grasp. The string may also be formed of a monofilament polymer spun from a mold.

The string or cable may have a diameter of at least 0.02 inches and / or no more than about 0.04 inches, or at least about 0.025 inches and / or no more than 0.035 inches, and diameters beyond this range may also be used.

 As described above, the wire guiding reel system of the present invention includes a spool for winding a wire, a winder for engaging and disengaging the spool, a dial for pivoting the spool, and a dial for rotating the dial only in one direction The ratchet, the spool, and the winder are engaged or separated. When the spool and the winder are engaged with each other through the button, only the wire can be tightened. When the spool and the winder are separated from each other, The wire can be easily wound and loosened by the simple operation of the button, and the parts can be assembled without any fastening parts. As a result, the winding work of the wire is quick and easy, and the assembly time is shortened.

In addition, the first and second eccentric tunnels of the spool are vertically spaced apart to allow the wires to be wound in two rows in the vertical direction, so that no lifting occurs between the wires at the time of winding, so that a large amount of wires can be aligned and wound.

The reel system of the present invention can be typically used in footwear including ski boots, snow boots, ice skates, horse riding boots, hiking, running shoes, running shoes, specializing, and training shoes, but in many different applications An effective and efficient locking device can be provided. Such applications may include use in locking or ancillary systems and may include backpacks and other similar products, waistlines and / or sleeves of belts, pants and jackets, helmet neck and headband, gloves, water sports , Snow sports, and other extreme sports, or in products and situations such as supports for pulling together two objects.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It should be understood that all of the techniques that can be easily changed and used by those skilled in the art are included in the technical scope of the present invention.

DESCRIPTION OF REFERENCE NUMERALS
5: wire 10: housing
11: bottom surface 12: fence
12a: gate 12b: one-way projection
13: Fixing plate 14:
20: spool 21: top plate
21a: rotation inducing projection 21a1: inclined surface
21a2: facing 22: bottom plate
22a: a jam preventing groove 23: a winding part
23a: center tunnel 23b: first eccentric tunnel
23b1: stopper 23c: second eccentric tunnel
23c1: Stopper 30: Winder
31: shaft rotating projection 31a: inclined surface
32: engaging groove 33: engaging jaw
40: ratchet 41: ratchet part
41a: ratchet projection 42: outer connector
42a: polygon 50: dial
51: Inner connecting body 51a:
51b: a groove 51c: a step
52: Through hole 53: Leaving prevention projection
60: Button 61:
62: engaging projection 63: engaging projection

Claims (5)

A housing having a bottom surface and a plurality of gates extending upwardly from the bottom surface and passing through the inner and outer peripheries of the outer surface, and a fence having unidirectional protrusions formed along the top surface;
A plurality of rotation-inducing protrusions are provided on the upper surface of the upper plate, a plurality of rotation-inducing protrusions are provided on the upper surface of the upper plate, ;
A spindle disposed above the spool and being vertically lifted and lowered to be spaced apart from and engaged with the spur protrusion of the spool;
A ratchet having a ratchet portion provided with a ratchet protrusion engaging with the unidirectional protrusion of the housing and having an outer connecting body having an inner peripheral surface in a polygonal shape;
A through hole having an inner connecting body formed on an outer circumferential surface of the outer connecting body of the ratchet and engaging with and engaging with a polygonal face of the outer connecting body of the ratchet and having a groove and a step continuous along the inner circumferential surface, A dial integrally rotatable unidirectionally with the ratchet in a covered state; And
A button disposed in the through hole of the dial and connected to the winder and vertically elevated and lowered integrally with the elevation protrusion,
The wire reeling system comprising: The method according to claim 1,
Wherein the rotation inducing protrusions of the spool are continuous along the upper surface rim of the upper plate of the spool and have a sloped surface and a facing surface, respectively. 3. The method of claim 2,
The shaft rotating protrusion of the winder is continuous along the bottom edge of the winder and is provided with an inclined surface corresponding to the inclined surface of the spool so that the button is pushed in the shaft rotating direction in the course of downward sliding along the inclined surface of the spool, Wherein said wire reeling system comprises: The method according to claim 1,
And a spring for elastically lifting and lowering the winder between the spool and the winder. The method according to claim 1,
Wherein the ratchet portion is provided with the ratchet projection having one end connected to the outer connector and the other end having a free end structure and protruding downward on the bottom surface thereof.

Images