阅读说明：本技术 一种旋钮式绳带松紧快捷调节扣 (Knob formula fag end elasticity swiftly adjusts knot ) 是由 奉飞华 于 2020-04-20 设计创作，主要内容包括：本发明涉及一种旋钮式绳带松紧快捷调节扣,旋钮、棘爪轮、底座上盖、从动棘轮、底座、星状轮辐、弹性限位支架；从上到下依次设有旋钮、棘爪轮、底座上盖、从动棘轮、底座、星状轮辐、弹性限位支架,所述弹性限位支架位于最底端,且弹性限位支架呈“T”字形,所述棘爪轮、底座上盖、从动棘轮、底座、星状轮辐均为环状,所述弹性限位支架贯穿棘爪轮、底座上盖、从动棘轮、底座、星状轮辐；本装置应用前景广阔,受力强度高,可灵活调整,操作快捷,操作简单。(The invention relates to a knob type cord tightness rapid adjusting buckle, which comprises a knob, a pawl wheel, a base upper cover, a driven ratchet wheel, a base, star-shaped spokes and an elastic limiting bracket, wherein the knob is arranged on the base; the device is characterized in that a knob, a pawl wheel, a base upper cover, a driven ratchet wheel, a base, star-shaped spokes and an elastic limiting support are sequentially arranged from top to bottom, the elastic limiting support is positioned at the bottommost end and is in a T shape, the pawl wheel, the base upper cover, the driven ratchet wheel, the base and the star-shaped spokes are all in a ring shape, and the elastic limiting support penetrates through the pawl wheel, the base upper cover, the driven ratchet wheel, the base and the star-shaped spokes; the device has wide application prospect, high stress intensity, flexible adjustment, quick operation and simple operation.)

1. A knob type cord tightness quick adjusting buckle is characterized in that a knob (1), a pawl wheel (2), a base upper cover (3), a driven ratchet wheel (4), a base (5), star-shaped spokes (6) and an elastic limiting support (8) are arranged on a base; the ratchet wheel mechanism is characterized in that a knob (1), a pawl wheel (2), a base upper cover (3), a driven ratchet wheel (4), a base (5), star-shaped spokes (6) and an elastic limiting support (8) are sequentially arranged from top to bottom, the elastic limiting support (8) is located at the bottommost end, the elastic limiting support (8) is in a T shape, the pawl wheel (2), the base upper cover (3), the driven ratchet wheel (4), the base (5) and the star-shaped spokes (6) are all in a ring shape, and the elastic limiting support (8) penetrates through the pawl wheel (2), the base upper cover (3), the driven ratchet wheel (4), the base (5) and the star-shaped spokes (6);

the knob (1) comprises a knob body (9), a first 7-shaped buckle (10), a support boss (11) and a second 7-shaped buckle (12);

the knob body (9) is a hollow cylindrical part with an opening at one end, 3 second 7-shaped buckles (12) are arranged on the inner side of the edge of the opening end of the cylindrical part, 3 support bosses (11) are arranged in the center of the inner side of the end face of the knob body (9), the support bosses (11) point to the center of the circular end face of the knob body (9), a first 7-shaped buckle (10) is arranged between each interval of the 3 support bosses (11), and the 3 first 7-shaped buckles (10) also point to the center of the circular end face of the knob body (9) and are arranged around the outer ring of the 3 support bosses (11);

the ratchet wheel (2) comprises a first ratchet (13) and a plurality of pawls (14), and the pawls (14) are uniformly distributed on the annular side surface of the ratchet wheel (2); the first ratchet (13) is positioned on the end surface of one side of the pawl wheel (2);

the base upper cover (3) comprises a second ratchet (15), a positioning boss (16), an annular boss (17) and an annular groove (18); the base upper cover (3) is integrally annular, an annular boss (17) is arranged on one end face of the base upper cover (3), and the annular boss (17) is flush with one end face of the base upper cover (3) and protrudes out of the annular side face of the base upper cover (3) to form a boss; the other end face of the base upper cover (3) is an annular end face, a plurality of positioning bosses (16) are arranged on the inner side of the annular end face, an annular groove (18) is arranged on the inner side of the annular end face of the base upper cover (3), one part of each positioning boss (16) is arranged in the annular groove (18), and the other part of each positioning boss is arranged on the annular end face of the base upper cover (3); the opening of the annular groove (18) faces to one side of the base upper cover (3) with an annular end face; a second ratchet (15) is arranged on the inner ring of the base upper cover (3); the driven ratchet wheel (4) comprises third ratchet teeth (19) and involute empty grooves (20), the driven ratchet wheel (4) is annular as a whole, a boss with the inner diameter the same as that of the driven ratchet wheel (4) body and the outer diameter smaller than that of the driven ratchet wheel (4) body is formed by the driven ratchet wheel (4) body and one end face of the driven ratchet wheel (4) body in a protruding mode, a plurality of annularly-arranged third ratchet teeth (19) are arranged on the boss, and a plurality of involute empty grooves (20) are annularly arranged in the driven ratchet wheel (4) body;

the base (5) comprises an intermittent extension boss (21), a threading groove (22), a T-shaped buckle (23) and a star-shaped guide groove (24); one end face of the base (5) is an annular plane, the other end of the base is open, a plurality of arc-shaped side faces are uniformly arranged around the annular plane at one end of the base (5) to form an annular side face with a plurality of intermittent fractures, one end face of each annular side face is positioned on the annular plane at one end of the base (5), the annular side faces are intermittent, intermittent extension bosses (21) are arranged at the other ends of the annular side faces, and the protruding parts of the intermittent extension bosses (21) protrude towards the outer sides of the annular side faces of the base (5) to form the intermittent extension bosses (21); each annular side surface, the discontinuous extension bosses (21) and the V-shaped reinforcing ribs form a plurality of mutually independent hole bodies with fan-shaped cross sections, and each adjacent reinforcing rib forms a star-shaped guide groove (24) which takes the central line of the base (5) as a junction and the interval between the annular side surfaces of the base (5) as a notch; at least one annular side surface of the base (5) is provided with two parallel threading grooves (22); a plurality of T-shaped buckles (23) are arranged on the circumferential edge of the annular plane of the base (5) opposite to the annular side surface; the star-shaped spoke (6) comprises a support bone (25), an arc threading groove (26) and a column-shaped boss (27); arc threading grooves (26) penetrating through the side walls are formed in the side walls of the star-shaped spokes (6), a plurality of rectangular supporting bones (25) are arranged on the inner side walls of the star-shaped spokes (6) towards the central direction, and gaps are formed between the end parts of every two supporting bones (25) close to one end of the central shaft of the star-shaped spokes (6); and a column-shaped boss (27) is arranged on the axial end face of each supporting bone (25) close to one end of the central shaft of the star-shaped spoke (6);

the elastic limiting bracket (8) comprises a wave-shaped elastic cylinder body (28), a third 7-shaped buckle (29) and a fixed beam (30); the elastic limiting support (8) is T-shaped as a whole, two wave-shaped elastic cylinders (28) are oppositely arranged, one end of each wave-shaped elastic cylinder (28) is fixed in the middle of the fixed beam (30), the other end of each wave-shaped elastic cylinder is provided with a wave shape, and each wave shape comprises an upper wave trough (31), a wave crest (32) and a lower wave trough (33); a third 7-shaped buckle (29) is arranged at four corners of the fixed beam (30) towards the direction of the wave-shaped elastic column body (28);

the knob (1) is buckled with the pawl wheel (2) through a first 7-shaped buckle (10) to form a whole; the star-shaped spoke (6) is arranged in a star-shaped guide groove (24) of the base (5), a cylindrical boss (27) faces upwards, the driven ratchet wheel (4) is placed in a top cavity of the base (5), and a ratchet (19) faces upwards;

the driven ratchet wheel (4) and the involute empty groove (20) are respectively sleeved on the corresponding cylindrical bosses (27) of the star-shaped spoke (6);

then, a second 7-shaped buckle (12) of the knob (1) is buckled into an annular boss (17) of the base upper cover (3) to complete the assembly of the whole assembly with the knob (1) and the pawl wheel (2), and the driven ratchet wheel (4) and the star-shaped spoke (6) are fixed in a gap between the base upper cover (3) and the base (5);

the whole assembled by the knob (1) and the pawl wheel (2) can freely move for a certain distance along the axial direction of the base upper cover (3) and is limited by a second 7-shaped buckle (12) of the knob (1);

the elastic limit bracket (8) is inserted from a center hole at the bottom of the base (5), and a third 7-shaped buckle (29) is respectively buckled with the T-shaped buckle (23) of the base (5).

2. A knob type cord tightness quick adjusting buckle according to claim 1, characterized in that the annular outer side surface of said rotating body (09) is provided with a concave anti-slip mark, the concave shape of said concave anti-slip mark is elongated in the axial direction.

Technical Field

The invention belongs to the technical field of rapid tightness adjustment of ropes, and particularly relates to a knob type quick tightness adjusting buckle for ropes.

Background

The existing rope belt tightness adjusting products on the market are limited by the structure and the size of the products, and most of the products are only suitable for specially modified or customized small rope belts, namely, the rope belt tightness adjusting products have poor adaptability to the size of the rope belts.

The parts of the existing rope belt tightness adjusting product on the market for winding the rope belt are all built in, space limitation causes that key stress parts cannot be designed too much, the strength of the adjusting buckle is limited, the bearing force is small, and the rope belt is easy to loosen.

Meanwhile, the tightness of the rope belt can be adjusted only by rotating or rotating for multiple times for multiple circles in the existing rope belt tightness adjusting products on the market, so that the operation is time-consuming and labor-consuming.

Take the shoelace comparatively commonly used in daily life as an example, people are in daily life, because vibrations and impact constantly produce the pulling force to the shoelace, the shoelace can often take place not hard up. On the other hand, the shoe lace is too tight and uncomfortable in the middle, and needs to be adjusted loosely.

For example, when a user rides a bicycle or runs, the user only needs to stretch out a single hand and slightly rotate the knob to tighten the shoelace, and otherwise, the shoelace can be loosened by pulling up the knob without stopping.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a knob type rapid cord tightness adjusting buckle, which comprises a knob, a pawl wheel, a base upper cover, a driven ratchet wheel, a base, star-shaped spokes and an elastic limiting bracket, wherein the knob is arranged on the base; the device is characterized in that a knob, a pawl wheel, a base upper cover, a driven ratchet wheel, a base, star-shaped spokes and an elastic limiting support are sequentially arranged from top to bottom, the elastic limiting support is positioned at the bottommost end and is in a T shape, the pawl wheel, the base upper cover, the driven ratchet wheel, the base and the star-shaped spokes are all in a ring shape, and the elastic limiting support penetrates through the pawl wheel, the base upper cover, the driven ratchet wheel, the base and the star-shaped spokes;

the knob comprises a knob body, a first 7-shaped buckle, a support boss and a second 7-shaped buckle;

the knob body is a hollow cylindrical part with an opening at one end, 3 second 7-shaped buckles are arranged on the inner side of the edge of the opening end of the cylindrical part, 3 supporting bosses are arranged at the center of the inner side of the end face of the knob body and point to the center of the circular end face of the knob body, a first 7-shaped buckle is arranged between each interval of the 3 supporting bosses, and the 3 first 7-shaped buckles also point to the center of the circular end face of the knob body and are arranged around the outer rings of the 3 supporting bosses;

the pawl wheel comprises a first ratchet and a plurality of pawls which are uniformly distributed on the annular side surface of the pawl wheel; the first ratchet is positioned on the end surface of one side of the pawl wheel;

the base upper cover comprises a second ratchet, a positioning boss, an annular boss and an annular groove; the base upper cover is integrally annular, an annular boss is arranged on one end face of the base upper cover, the annular boss is flush with one end face of the base upper cover and protrudes out of the annular side face of the base upper cover to form a boss; the other end surface of the base upper cover is an annular end surface, a plurality of positioning bosses are arranged on the inner side of the annular end surface, annular grooves are arranged on the inner side of the annular end surface of the base upper cover, a part of the positioning bosses are arranged in the annular grooves, and a part of the positioning bosses are arranged on the annular end surface of the base upper cover; the opening of the annular groove faces to one side of the base, which is covered with an annular end face; a second ratchet is arranged on the inner ring of the upper cover of the base;

the driven ratchet wheel comprises third ratchets and involute empty grooves, the driven ratchet wheel is annular as a whole, a boss with the inner diameter the same as that of the driven ratchet wheel body and the outer diameter smaller than that of the driven ratchet wheel body is formed by the driven ratchet wheel body and one end face of the driven ratchet wheel body in a protruding mode, a plurality of annularly arranged third ratchets are arranged on the boss, and a plurality of involute empty grooves are annularly arranged in the driven ratchet wheel body;

the base comprises an intermittent extension boss, a threading groove, a T-shaped buckle and a star-shaped guide groove; one end face of the base is an annular plane, the other end of the base is provided with an opening, a plurality of arc-shaped side faces are uniformly arranged around the annular plane at one end of the base to form an annular side face with a plurality of intermittent fractures, one end face of each annular side face is positioned on the annular plane at one end of the base, each annular side face is discontinuous, an intermittent epitaxial boss is arranged at the other end of each annular side face, and a protruding part of each intermittent epitaxial boss protrudes to the outer side of each annular side face of the base to form an intermittent epitaxial boss; each annular side surface, the discontinuous extension lug bosses and the V-shaped reinforcing ribs form a plurality of mutually independent hole bodies with fan-shaped cross sections, and each adjacent reinforcing rib forms a star-shaped guide groove which takes the central line of the base as a junction and the interval between the annular side surfaces of the base as a notch; at least two parallel threading grooves are arranged on the annular side surface of one of the bases; a plurality of T-shaped buckles are arranged on the circumferential edge of the annular plane of the base, which is opposite to the annular side surface;

the star-shaped spoke comprises a support bone, an arc threading groove and a cylindrical boss; the side wall of the star-shaped spoke is provided with an arc threading groove which penetrates through the side wall, a plurality of cuboid supporting bones are arranged on the inner side wall of the star-shaped spoke towards the center direction, and a gap is arranged between the end parts of every two supporting bones which are close to one end of the central shaft of the star-shaped spoke; and a cylindrical boss is arranged on the axial end face of each supporting bone close to one end of the central shaft of the star-shaped spoke;

the elastic limiting bracket comprises a wave-shaped elastic cylinder, a third 7-shaped buckle and a fixed beam; the elastic limiting support is in a T shape as a whole, two wave-shaped elastic cylinders are oppositely arranged, one end of each wave-shaped elastic cylinder is fixed in the middle of the fixed beam, the other end of each wave-shaped elastic cylinder is provided with a wave shape, and each wave shape comprises an upper wave trough, a wave crest and a lower wave trough; a third 7-shaped buckle is arranged at four corners of the fixed beam towards the direction of the wave-shaped elastic column body;

the knob is buckled with the pawl wheel through a first 7-shaped buckle to form a whole;

the star-shaped spoke is arranged in the star-shaped guide groove of the base, the cylindrical boss faces upwards, the driven ratchet wheel is placed in the cavity at the top of the base, and the third ratchet faces upwards;

the driven ratchet wheel and the involute empty groove are respectively sleeved on the corresponding cylindrical bosses of the star-shaped spoke;

then buckling a second 7-shaped buckle of the knob into an annular boss of the upper cover of the base to complete the assembly of the whole assembly of the knob and the ratchet wheel, wherein the driven ratchet wheel and the star-shaped spoke are fixed in a gap between the upper cover of the base and the base;

the whole assembled by the knob and the pawl wheel can freely move for a certain distance along the axial direction of the upper cover of the base and is limited by a second 7-shaped buckle of the knob;

and the elastic limiting support is inserted from a central hole at the bottom of the base, and the third 7-shaped buckle is buckled with the T-shaped buckle of the base respectively.

Preferably, the annular outer side surface of the rotating body is provided with a concave anti-slip mark, and the concave shape of the concave anti-slip mark is long in the axial direction.

Has the advantages that:

(1) has wide application prospect. Because the parts for winding the rope belt are externally designed, the device is not limited by the shape and size of the rope belt, can be widely applied to the common parts in the market at present, does not need to specially customize the rope belt or specially modify products, and can be widely applied to the occasions or products needing quick tightness adjustment by using the rope or the belt, such as shoes, medical equipment, military equipment, sports equipment and the like;

(2) the stress intensity is high, and the adjustment can be flexible. Because the outward expansion mechanism design is applied, the parts wound by the rope are arranged externally, the problems that the strength and the size of the key parts of similar products on the market are limited due to the size of the internal space are solved, the strength and the size of the key parts can be flexibly adjusted according to the requirements of different application occasions, and the integral structure of the mechanism is not influenced

(3) The operation is quick. The rope belt can be tightened only by slightly turning the knob by one hand; the function that other products can be realized only by rotating for a plurality of circles can be completed only if the rotating amplitude is less than 1/4 circles, otherwise, the cord is pulled up by the knob to be loosened, and the operating efficiency is greatly improved.

(4) The operation is simple. Can be operated by one hand, and can be operated by children, old people and disabled people with only one hand in the driving or riding process without stopping.

Drawings

FIG. 1 is an exploded view of a knob type quick adjusting buckle for tightness of a cord of the present invention;

FIG. 2 is a perspective view of a knob of the quick tightness adjustment buckle of the knob type cord;

FIG. 3 is a front perspective view of a ratchet wheel of a knob-type cord tightness quick adjustment buckle according to the present invention;

FIG. 4 is a rear perspective view of a ratchet wheel of a knob-type cord tightness quick adjustment buckle according to the present invention;

FIG. 5 is a front perspective view of the upper cover of the base of the knob type cord tightness quick adjustment buckle of the present invention;

FIG. 6 is a back perspective view of the upper cover of the base of a knob type cord tightness quick adjustment buckle according to the present invention;

FIG. 7 is a front perspective view of the driven ratchet wheel of the knob type cord tightness quick adjustment buckle of the present invention;

FIG. 8 is a rear perspective view of the driven ratchet of the knob type cord tightness quick adjustment buckle of the present invention;

FIG. 9 is a perspective view of a base of a knob type quick tightness adjustment buckle for a cord;

FIG. 10 is a perspective view of a star-shaped spoke for quick adjustment of the tightness of a knob-type band of the present invention;

FIG. 11 is a perspective view of an elastic limit bracket of a knob type cord tightness quick adjusting buckle of the present invention;

FIG. 12 is a cross-sectional view of the separation of the ratchet wheel and the driven ratchet wheel of the knob type rapid tightness adjustment buckle of the cord of the present invention;

FIG. 13 is a cross-sectional view of a knob type cord tightness quick adjustment buckle pawl wheel of the present invention engaged with a driven ratchet wheel;

in the figure: 1-knob, 2-pawl wheel, 3-base upper cover, 4-driven ratchet wheel, 5-base, 6-star-shaped spoke, 8-elastic limit bracket, 9-knob body, 10-first 7-shaped buckle, 11-support boss, 12-second 7-shaped buckle, 13-first ratchet, 14-pawl, 15-second ratchet, 16-positioning boss, 17-annular boss, 18-annular groove, 19-third ratchet, 20-involute empty groove, 21-discontinuous extension boss, 22-threading groove, 23-T-shaped buckle, 24-star-shaped guide groove, 25-support bone, 26-arc threading groove, 27-column boss, 28-wave-shaped elastic column body, 29-third 7-shaped buckle, 30-fixed beam.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The invention will now be described in further detail with reference to the figures and examples, without in any way limiting the scope of the invention.

With reference to fig. 1-13, a knob type cord tightness degree quick adjusting buckle comprises a knob 1, a pawl wheel 2, a base upper cover 3, a driven ratchet wheel 4, a base 5, a star-shaped spoke 6 and an elastic limit bracket 8; the ratchet wheel device is characterized in that a knob 1, a pawl wheel 2, a base upper cover 3, a driven ratchet wheel 4, a base 5, star-shaped spokes 6 and an elastic limiting support 8 are sequentially arranged from top to bottom, the elastic limiting support 8 is positioned at the bottommost end, the elastic limiting support 8 is in a T shape, the pawl wheel 2, the base upper cover 3, the driven ratchet wheel 4, the base 5 and the star-shaped spokes 6 are all in a ring shape, and the elastic limiting support 8 penetrates through the pawl wheel 2, the base upper cover 3, the driven ratchet wheel 4, the base 5 and the star-shaped spokes 6;

the knob 1 comprises a knob body 9, a first 7-shaped buckle 10, a support boss 11 and a second 7-shaped buckle 12;

the knob body 9 is a hollow cylindrical part with an opening at one end, 3 second 7-shaped buckles 12 are arranged on the inner side of the edge of the opening end of the cylindrical part, 3 support bosses 11 are arranged at the center of the inner side of the end face of the knob body 9, the support bosses 11 point to the center of the circular end face of the knob body 9, a first 7-shaped buckle 10 is respectively arranged between each interval of the 3 support bosses 11, and the 3 first 7-shaped buckles 10 also point to the center of the circular end face of the knob body 9 and are arranged around the outer rings of the 3 support bosses 11;

the ratchet wheel 2 comprises a first ratchet 13 and a plurality of pawls 14, and the pawls 14 are uniformly distributed on the annular side surface of the ratchet wheel 2; the first ratchet 13 is positioned on the end surface of one side of the pawl wheel 2;

the base upper cover 3 comprises a second ratchet 15, a positioning boss 16, an annular boss 17 and an annular groove 18; the base upper cover 3 is annular as a whole, an annular boss 17 is arranged on one end face of the base upper cover 3, and the annular boss 17 is flush with one end face of the base upper cover 3 and protrudes out of the annular side face of the base upper cover 3 to form a boss; the other end face of the base upper cover 3 is an annular end face, a plurality of positioning bosses 16 are arranged on the inner side of the annular end face, an annular groove 18 is arranged on the inner side of the annular end face of the base upper cover 3, a part of the positioning bosses 16 are arranged in the annular groove 18, and a part of the positioning bosses are arranged on the annular end face of the base upper cover 3; the opening of the annular groove 18 faces to one side of the base upper cover 3 with an annular end face; a second ratchet 15 is arranged on the inner ring of the base upper cover 3;

the driven ratchet wheel 4 comprises third ratchets 19 and involute-shaped empty grooves 20, the driven ratchet wheel 4 is annular as a whole, a boss with the inner diameter same as that of the driven ratchet wheel 4 and the outer diameter smaller than that of the driven ratchet wheel 4 is formed by a driven ratchet wheel 4 main body and a bulge on one end face of the driven ratchet wheel 4 main body, the boss is provided with a plurality of annularly-arranged third ratchets 19, and a plurality of involute-shaped empty grooves 20 are annularly arranged in the driven ratchet wheel 4 main body;

the base 5 comprises an intermittent extension boss 21, a threading groove 22, a T-shaped buckle 23 and a star-shaped guide groove 24; one end face of the base 5 is an annular plane, the other end of the base 5 is provided with an opening, a plurality of arc-shaped side faces are uniformly arranged around the annular plane at one end of the base 5 to form an annular side face with a plurality of intermittent fractures, one end face of each annular side face is positioned on the annular plane at one end of the base 5, each annular side face is discontinuous, an intermittent extension boss 21 is arranged at the other end of each annular side face, and a protruding part of each intermittent extension boss 21 protrudes to the outer side of each annular side face of the base 5 to form the intermittent extension boss 21; each annular side surface, the discontinuous extension bosses 21 and the V-shaped reinforcing ribs form a plurality of mutually independent hole bodies with fan-shaped cross sections, and each adjacent reinforcing rib forms a star-shaped guide groove 24 which takes the central line of the base 5 as a junction and the space between each annular side surface of the base 5 as a notch; at least one of the bases 5 is provided with two parallel threading grooves 22 on the annular side surface; a plurality of T-shaped buckles 23 are arranged on the circumferential edge of the annular plane of the base 5 opposite to the annular side surface;

the star-shaped spoke 6 comprises a support bone 25, an arc threading groove 26 and a column-shaped boss 27; the side wall of the star-shaped spoke 6 is provided with an arc threading groove 26 which penetrates through the side wall, a plurality of rectangular supporting bones 25 are arranged on the inner side wall of the star-shaped spoke 6 towards the center direction, and a gap is arranged between the end parts of every two supporting bones 25 at one end close to the central shaft of the star-shaped spoke 6; and a column-shaped boss 27 is arranged on the axial end face of each supporting bone 25 close to one end of the central shaft of the star-shaped spoke 6;

the elastic limiting bracket 8 comprises a wave-shaped elastic cylinder 28, a third 7-shaped buckle 29 and a fixed beam 30; the elastic limiting bracket 8 is in a T shape as a whole, two wave-shaped elastic cylinders 28 are oppositely arranged, one end of each wave-shaped elastic cylinder 28 is fixed in the middle of the fixed beam 30, the other end of each wave-shaped elastic cylinder is provided with a wave shape, and each wave shape comprises an upper wave trough 31, a wave crest 32 and a lower wave trough 33; a third 7-shaped buckle 29 is arranged at four corners of the fixed beam 30 towards the direction of the wave-shaped elastic column body 28;

the knob 1 is buckled with the pawl wheel 2 through a first 7-shaped buckle 10 to form a whole;

the star-shaped spokes (6) are arranged in the star-shaped guide grooves (24) of the base (5), the cylindrical bosses (27) face upwards, the driven ratchet (4) is placed in the top cavity of the base (5), and the third ratchet teeth (19) face upwards;

the driven ratchet wheel 4 and the involute empty groove 20 are respectively sleeved on the corresponding cylindrical bosses 27 of the star-shaped spoke 6;

then, a second 7-shaped buckle 12 of the knob 1 is buckled into an annular boss 17 of the base upper cover 3 to complete the assembly of the whole assembly with the knob 1 and the pawl wheel 2, and the driven ratchet wheel 4 and the star-shaped spoke 6 are fixed in a gap between the base upper cover 3 and the base 5;

the whole assembled by the knob 1 and the pawl wheel 2 can freely move for a certain distance along the axial direction of the base upper cover 3 and is limited by a second 7-shaped buckle 12 of the knob 1;

the elastic limit bracket 8 is inserted from the central hole at the bottom of the base 5, and the third 7-shaped buckle 29 is respectively buckled with the T-shaped buckle 23 of the base 5.

In one embodiment, the annular outer surface of the rotating body 9 is provided with a concave anti-slip mark, and the concave shape of the concave anti-slip mark is elongated in the axial direction.

Working principle and operation explanation:

when the knob 1 is pressed down, the first ratchet 13 of the pawl wheel 2 is meshed with the third ratchet 19 of the driven ratchet 4; the pawl 14 of the pawl wheel 2 is forced to elastically deform from the outside to the center of the circle, and is pressed into the second ratchet 15 of the base upper cover 3 and meshed.

At the moment, the minimum position of the central hole of the ratchet wheel 2 is clamped into the wave trough of the wave-shaped elastic column 28 of the elastic limit bracket 8, and the axial positioning is completed.

A clockwise rotation knob, the driven ratchet wheel 4 is driven by the first ratchet 13 of the pawl wheel 2 to rotate together; the involute empty slot 20 of the driven ratchet wheel 4 drives the star-shaped spoke 6 to expand outwards from the center through the column-shaped boss 27 of the star-shaped spoke 6, and the rope belt is stretched and tightened.

At this time, the pawl 14 of the pawl wheel 2 is meshed with the second ratchet 15 of the base upper cover 3, and the knob is prevented from loosening in the counterclockwise direction.

When the whole assembled by the knob 1 and the pawl wheel 2 is pulled up, the first ratchet 13 of the pawl wheel 2 is separated from the third ratchet 19 of the driven ratchet 4; the pawl 14 of the pawl wheel 2 is separated from the second ratchet 15 of the base upper cover 3, at the moment, the star-shaped spoke 6 and the driven ratchet 4 lose external force and are in a loose state, and at the moment, the rope belt is in a free loose state. When the rope belt loosens in the counterclockwise direction to a proper degree, the knob 1 is pressed down, the knob 1 is rotated clockwise, and the rope belt 07 is locked again.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.