Cord adjustment wheel

Abstract

A cord adjustment wheel comprising a lower and an upper housing, wherein the upper housing is rotatably mounted on a top surface of the lower housing and a spool is rotatably connected within the lower housing; wherein a ratchet is fixedly connected within the lower housing and a pawl snapped onto the ratchet is fixedly connected within the upper housing; and a pressure cap is slidably connected to a top surface of the upper housing and a pressure adjustment mechanism is disposed between the pressure cap and the spool.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of rotary controls and, more particularly, to a rotary control for cord adjustment. STATE OF THE ART

[0002] A dial is a component that allows the tightness of an item to be adjusted. It is commonly used on clothing, luggage, and sporting equipment. A connected cord or lace can be tightened or loosened by turning a dial to achieve a specific setting.

[0003] Because existing twist locks are relatively complex, they can only release cords or strings slowly rather than quickly during the adjustment process. Otherwise, the internal structures can easily get caught, rendering the twist locks unusable and significantly impairing the user experience. CONTENT OF THIS APPLICATION

[0004] Disclosed is a cord adjustment wheel having a lower and an upper housing. The upper housing is rotatably mounted on the upper housing, a spool is rotatably mounted in the lower housing, a ratchet is fixedly mounted in the lower housing, and a pawl that snaps onto the ratchet is fixedly mounted in the upper housing. A pressure cap is slidably connected to the upper housing, and a pressure adjustment mechanism is located between the pressure cap and the spool. When the cord is released, the spool of the cord adjustment wheel rotates counterclockwise. Only the spool and the second circumferential limiting surfaces at the upper end of the spool rotate; all other components remain stationary. As a result, the cord does not snag but can be released quickly. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a first structural schematic diagram of a cord adjusting wheel according to the present disclosure. Fig. 2 is a first exploded view of a cord adjustment wheel according to the present disclosure. Fig. 3 is a second exploded view of a cord adjustment wheel according to the present disclosure. Fig. 4 is a structural schematic diagram of the first circumferential limiting surfaces of a cord adjusting wheel according to the present disclosure. Fig. 5 is a structural schematic diagram of a serrated inclined surface of a cord adjusting wheel according to the present disclosure. Fig. 6 is a sectional view of a cord adjustment wheel according to the present disclosure. Fig. 7 is a structural schematic diagram of a pressure cap of a cord adjustment wheel according to the present disclosure. Fig. 8 is a structural schematic diagram of an upper housing of a cord adjusting wheel according to the present disclosure.

[0005] Reference numerals in the accompanying drawings: 1. Lower housing; 101. Upper housing; 102. Anti-slip sleeve; 2. Spool; 201. Line outlet; 3. Ratchet; 301. Pawl; 4. Pressure cap; 401. Long groove; 402. Short groove; 403. Toothed inclined surface; 5. Adjusting cylinder; 501. Inclined snap column; 502. First circumferential limiting surface; 6. Second circumferential limiting surface; and 7. Spring. DETAILED DESCRIPTION

[0006] The technical solutions in the embodiments of the present disclosure are described clearly and comprehensively below with reference to the accompanying drawings. It should be understood that the described embodiments constitute only a part of the present disclosure.

[0007] In describing this disclosure, it should be noted that the terms "top," "bottom," "front," "back," "left," "right," "upper," "down," "inside," "outside," etc., indicate azimuthal or positional relationships based on the relationships shown in the drawings, solely for the convenience of describing this disclosure and simplifying the description. They are not intended to state or imply that the referenced device or element must have a particular orientation, be constructed, and be operative in a particular orientation, and thus should not be construed as limiting this disclosure. Embodiment:

[0008] Referring to the Fig. A cord adjustment wheel comprises a lower housing 1 and an upper housing 101. The upper housing 101 is rotatably mounted on the lower housing 1 and is secured by snapping onto the upper housing 1, so that the upper housing can only rotate around the lower housing 1. A spool 2 is rotatably mounted in the lower housing 1 (see Fig. ). The spool 2 can only rotate around its own axis. A cord is wound clockwise around the spool 2 with one end protruding outward. A ratchet 3 is fixedly connected to the lower housing 1, and a pawl 301 snapped onto the ratchet 3 is fixedly connected to the upper housing 101. When the pawl 301 rotates clockwise, it automatically disengages from the ratchet 3 due to its elasticity, and when the pawl 301 rotates counterclockwise, the pawl 301 and the ratchet 3 are directly locked and cannot rotate.

[0009] A pressure cap 4 is slidably connected to a top surface of the upper housing 101, and a protrusion is formed on a bottom surface of the pressure cap 4 so that the pressure cap can only slide in the upper housing 101 and cannot be detached from the top surface; and a pressure adjustment mechanism is arranged between the pressure cap 4 and the spool 2, and the pressure adjustment mechanism is used to adjust the loosening or tightening of the line.

[0010] The pressure adjustment mechanism includes an adjustment cylinder 5 slidably connected to the upper housing 101; long grooves 401 and short grooves 402 are alternately arranged on an inner periphery of the upper housing 101; and inclined snap-lock columns 501 are arranged and distributed on a periphery of a side wall of the adjustment cylinder 5, and the inclined snap-lock columns 501 can be snapped into the long grooves 401 or the short grooves 402.

[0011] The number of inclined snap columns 501 is 4-10, preferably 6, and all are attached to the side wall of the adjusting cylinder 5.

[0012] The number of long grooves 401 and short grooves 402 is the same as that of the inclined snap lock columns 501.

[0013] A bottom surface of the adjusting cylinder 5 is provided with first circumferential limiting surfaces 502, and a top surface of the spool 2 is provided with second circumferential limiting surfaces 6 which cooperate with the first circumferential limiting surfaces, and the first circumferential limiting surfaces 502 and the second circumferential limiting surfaces 6 can be joined together or detached from each other.

[0014] The second circumferential boundary surfaces 6 are attached to the top of the coil 2.

[0015] As in Fig. 4, the number of first circumferential boundary surfaces 502 is equal to the number of second circumferential boundary surfaces 6, and both are distributed over the circumference; and the first circumferential boundary surfaces 502 and the second circumferential boundary surfaces 6 are interlocked, ie, the first circumferential boundary surfaces 502 and the second circumferential boundary surfaces 6 can fit together.

[0016] A bottom surface of the pressure cap 4 is provided with serrated, inclined surfaces 403 that cooperate with the inclined snap columns 501; and when the pressure cap 4 is pressed downward, the serrated, inclined surfaces 403 can come into contact with the inclined surfaces of the underlying inclined snap columns 501.

[0017] The serrated bevels 403 are also distributed over the circumference.

[0018] A spring 7 is connected between the slide 2 and the adjusting cylinder 5.

[0019] A number of the first circumferential limiting surfaces 502 and the second circumferential limiting surfaces 6 is also equal to a number of the inclined snapfitting columns 501. That is, the numbers of the long grooves 401, the short grooves 402, the inclined snapfitting columns 501, the first circumferential limiting surfaces 502, and the second circumferential limiting surfaces 6 are all the same.

[0020] In operation, when the inclined locking columns 501 are engaged in the longitudinal grooves 401, as shown in the Fig. 6 and Fig. 7, the adjusting cylinder 5, under the action of the spring 7, causes a complete disengagement of the first circumferential limiting surfaces 502 from the second circumferential limiting surfaces 6, ie a lowest point of the first circumferential limiting surfaces 502 is higher than a highest point of the second circumferential limiting surfaces 6, so that they can disengage completely and lose their limiting function.

[0021] After the cord is pulled to release it, the spool 2 rotates counterclockwise to pull out the wound cord.

[0022] When the cable is released, the spool 2 rotates counterclockwise. Since the second circumferential limiting surfaces 6 are completely disengaged from the first circumferential limiting surfaces 502, only the spool 2 and the second circumferential limiting surfaces 6 at the top of the spool 2 rotate; all other components remain stationary. This prevents jamming and allows the cable to be released quickly, improving the user experience.

[0023] When the cord needs to be tightened, the pressure cap 4 is pressed down, the serrated inclined surfaces 403 come into contact with the inclined surfaces of the inclined snap-lock columns 501; when the pressure cap is further pressed down, the inclined locking columns 501 disengage from the long groove 401, the adjusting cylinder 5 rotates around its own axis until below the short grooves 402 due to the interaction between the serrated inclined surfaces 403 and the inclined surfaces of the inclined locking columns 501, and after the pressure cap 4 is released, the adjusting cylinder 5 returns upward under the action of the spring 7, and the inclined locking columns 501 engage in the short grooves 402. Since the short grooves 402 are relatively short, the adjusting cylinder 5 does not return to its original height, the first circumferential limiting surfaces 502 do not completely detach from the second circumferential limiting surfaces 6, but are still locked together.

[0024] The upper housing 101 is then rotated clockwise, the upper housing 101 is snapped onto the second circumferential limiting surfaces 6 by the first circumferential limiting surfaces 502 on the underside of the adjusting cylinder 5 and drives the spool 2 to rotate, and the spool 2 rotates clockwise so that the cord is tensioned. When the upper housing 101 rotates clockwise, the pawl 301 also rotates clockwise simultaneously, the pawl 301 is automatically disengaged from the ratchet 3; and when the rotation stops, the pawl 301 can effectively prevents the upper housing 101 from reversing, thereby preventing the cord from loosening.

[0025] When the cord needs to be released again, the pressure cap 4 is pressed down again, the adjusting cylinder 5 continues to rotate and the inclined locking columns 501 then engage in the longitudinal grooves 401.

[0026] Both the first circumferential boundary surfaces 502 and the second circumferential boundary surfaces 6 are inclined surfaces. The design of the inclined surfaces further improves the stability of the snap connection between the first circumferential boundary surfaces 502 and the second circumferential boundary surfaces 6.

[0027] As in the Fig. 1 and Fig. 3, a cable outlet 201 is formed on the lower case 1, and one end of the cable is led out through the cable outlet 201 and extends outward.

[0028] An anti-slip sleeve 102 is connected to a fixing rod on a side wall of the upper case 101, and the design of the anti-slip sleeve 102 helps prevent the hand from slipping when the upper case 101 is rotated to tighten the cord, thereby improving the user experience.

[0029] The above descriptions merely represent preferred specific implementations of the present disclosure and do not limit its scope. Equivalent substitutions or modifications made by a person skilled in the art according to the technical solution of the present disclosure and its inventive concepts within the technical scope set forth in the present disclosure are within the scope of the present disclosure.

Claims

[1] A cord adjustment wheel comprising a lower and an upper housing, the upper housing being rotatably mounted on a top surface of the lower housing and a spool being rotatably connected within the lower housing; a ratchet being fixedly connected within the lower housing and a pawl snapped onto the ratchet being fixedly connected within the upper housing; and a pressure cap being slidably connected to a top surface of the upper housing and a pressure adjustment mechanism being disposed between the pressure cap and the spool. [2] The cord adjustment wheel according to claim 1, wherein the pressure adjustment mechanism comprises an adjustment cylinder and the adjustment cylinder is slidably connected within the upper housing; long and short grooves are arranged alternately on an inner circumference of the upper casing; inclined snap-lock columns are arranged and distributed on a circumference of a side wall of the adjusting cylinder; a bottom side of the adjusting cylinder is provided with first circumferential limiting surfaces and a top side of the spool is provided with second circumferential limiting surfaces that cooperate with the first circumferential limiting surfaces; an underside of the press cap is provided with serrated, inclined surfaces which cooperate with the inclined snap-lock columns; and A spring is connected between the coil and the adjusting cylinder. [3] The cord adjusting wheel according to claim 2, wherein the first circumferential limiting surfaces and the second circumferential limiting surfaces are both inclined surfaces. [4] The cord adjusting wheel according to claim 1, wherein a cord outlet is formed on the lower housing. [5] The cord adjustment wheel according to claim 1, wherein an anti-slip sleeve is connected to a mounting rod on a side wall of the upper housing.

Images