BELT BUCKLE ASSEMBLY AND WEIGHTLIFTING BELT

The present invention discloses a belt buckle assembly and a weightlifting belt, and belongs to the technical field of belts. The belt buckle assembly according to the present invention comprises a belt buckle base plate, a pin shaft member, a ratchet wheel and a handle ratchet which fit each other, and a swing handle housing, wherein the swing handle housing is rotatably mounted on the belt buckle base plate through the pin shaft member; the handle ratchet is rotatably supported and mounted on the swing handle housing; the ratchet wheel is provided with a center hole and is sleeved on the pin shaft member through the center hole; and the ratchet wheel is provided with an unlocking slot. The belt buckle assembly further comprises a ratchet wheel unlocking mechanism, wherein the ratchet wheel unlocking mechanism comprises an unlocking assembly, which can move axially or radially along the pin shaft member.

TECHNICAL FIELD

The present invention relates to the technical field of belts, and in particular, to a belt buckle assembly and a weightlifting belt.

BACKGROUND

A weightlifting belt, also known as a weightlifting leather belt, is a thick leather belt for protecting waist and back, and is used in squats, standing presses, deadlifts, or the like. It is one of the bodybuilding terms. The weightlifting belt is a protective tool designed to protect waist muscles and soft tissues from injury. Since weightlifting sometimes involves lifting weights heavier than a body weight of a user, the user needs to protect the waist from injury while maximizing a strength potential of the user, so as to use all strength to lift the barbell.

The existing weightlifting belt has a relatively conventional structural design, and is not convenient enough in the tightness adjustment. Therefore, the applicant has proposed Chinese utility model patent with Publication No. CN210076633U on Feb. 18, 2020 and entitled “CONVENIENTLY ADJUSTABLE WEIGHTLIFTING BELT” to solve the above problems. However, the applicant found after development and production that this weightlifting belt has an overly complex structure, low production efficiency, and poor overall appearance; in addition, this weightlifting belt has some defects in the structural design, and consequently, this structure is not ergonomic, and the operation and the adjustment are not convenient enough.

SUMMARY

1. Technical Problems to Be Resolved in the Present Invention

The present invention provides a belt buckle assembly, which aims to solve the problem of inconvenient unlocking and adjustment structure of the existing belt buckle assembly.

The present invention further provides a weightlifting belt, and the tightness adjustment of the weightlifting belt in use can be conveniently performed by using the belt buckle assembly.

2. Technical Solutions

In order to achieve the objective, the present invention provides the following technical solutions.

A belt buckle assembly provided by the present invention comprises a belt buckle base plate, a pin shaft member, a ratchet wheel and a handle ratchet which fit each other, and a swing handle housing, wherein the swing handle housing is rotatably mounted on the belt buckle base plate through the pin shaft member, the handle ratchet is rotatably supported and mounted on the swing handle housing,the ratchet wheel is provided with a center hole and sleeved on the pin shaft member through the center hole, and the ratchet wheel is provided with an unlocking slot;the belt buckle assembly further comprises a ratchet wheel unlocking mechanism; wherein the ratchet wheel unlocking mechanism comprises an unlocking member, and the unlocking member can move radially along the pin shaft member so as to be engaged into or disengaged from the unlocking slot, or the ratchet wheel unlocking mechanism comprises a limiting sleeve, and the limiting sleeve can move axially along the pin shaft member so as to be engaged into or disengaged from the unlocking slot; andthe structure of the ratchet wheel unlocking mechanism is arranged such that when the unlocking assembly is engaged into the unlocking slot of the ratchet wheel, the pin shaft member can rotate together with the ratchet wheel, and when the unlocking assembly is disengaged from the unlocking slot of the ratchet wheel, the pin shaft member can rotate individually.

Furthermore, the ratchet wheel unlocking mechanism uses a button assembly, the button assembly comprising the limiting sleeve; and the limiting sleeve is movably sleeved with the ratchet wheel, and a plurality of convex parts fitting the unlocking slots are distributed at an inner side end of the limiting sleeve.

Furthermore, the button assembly further comprises a button and a button nut, a button stud extends from an inner end of the button, the button stud movably passes through a center hole of an end face of the limiting sleeve and is connected to the button nut in a threaded fit manner, and the convex parts are distributed on an outer circumferential wall of an upper end of the limiting sleeve.

Furthermore, sleeve rib parts are distributed and arranged on an inner wall of the limiting sleeve, and axial guide grooves fitting the sleeve rib parts are distributed and arranged on an outer wall of a short shaft.

Furthermore, a lower end face of the pin shaft member is provided with a button spring groove, a button spring is arranged in the button spring groove, and a lower end of the button spring is connected against an upper end face of the button assembly.

Furthermore, the ratchet wheel unlocking mechanism uses the unlocking member, and the unlocking member is mounted in an unlocking hole formed in a peripheral surface of the pin shaft member and radially moves along the pin shaft member.

Furthermore, the ratchet wheel unlocking mechanism further comprises a button assembly; the pin shaft member is provided with a button hole along an axial direction, and the unlocking hole formed on the peripheral surface of the pin shaft member is communicated with the button hole; and the button assembly is arranged in the button hole and can drive the unlocking member to stretch and retract to complete an unlocking action.

Furthermore, the button assembly comprises a locking part and a releasing part axially arranged in sections; the button assembly axially moves along the button hole, and outer peripheral surfaces of the locking part and the releasing part of the button assembly can be separately in contact fit with the unlocking member; when the outer peripheral surface of the locking part of the button assembly is in contact fit with the unlocking part, the unlocking part protrudes out of a surface of the unlocking hole of the pin shaft part, so that the ratchet wheel is locked; and when the outer peripheral surface of the releasing part of the button assembly is in contact fit with the unlocking member, the unlocking member is completely positioned in the unlocking hole of the pin shaft member, so that the ratchet wheel is unlocked.

Furthermore, a button is mounted at an outer end of the button assembly, and the button protrudes out of an end face of the pin shaft member.

Furthermore, an elastic member that presses an inner end of the unlocking member is arranged in the button hole of the pin shaft member.

Furthermore, the unlocking member has a spherical shape.

Furthermore, the outer peripheral surface of the locking part of the button assembly has an arc-shaped surface matched with a spherical surface of the unlocking member.

Furthermore, a maximum distance that the unlocking member extends out of the unlocking hole is less than a radius of the spherical unlocking member.

Furthermore, the pin shaft member is provided with a plurality of unlocking holes at intervals along an outer peripheral surface, one unlocking member is mounted in each unlocking hole, and the ratchet wheel is provided with an unlocking slot corresponding to the unlocking hole.

Furthermore, a pair of handle lug plate housings that rotatably fit at two ends of the pin shaft member extend from an end part of the swing handle housing, a pair of base lug plate housings extend from a front surface of the belt buckle base plate, and the pin shaft member is rotatably mounted in the base lug plate housing through a shaft sleeve.

Furthermore, a tooth end of the handle ratchet is embedded into a ratchet wheel tooth groove of the ratchet wheel, one side that is of the handle ratchet and that is far away from the ratchet wheel is provided with a handle ratchet spring groove, one end and the other end of the handle ratchet spring abut against the handle ratchet spring groove and an inner wall of the handle lug plate housing respectively, and the handle ratchet spring is rotatably mounted in the handle lug plate housing through a handle ratchet shaft.

Furthermore, the belt buckle assembly further comprises a seat plate ratchet, wherein the seat plate ratchet is rotatably mounted in the base lug plate housing below through a seat plate ratchet shaft.

Furthermore, a tooth end of the seat plate ratchet is also embedded into the ratchet wheel tooth groove of the ratchet wheel, an outer side wall of the seat plate ratchet is provided with a seat plate ratchet spring groove, a seat plate ratchet spring is arranged in the seat plate ratchet spring groove, and the other end of the seat plate ratchet spring is connected against an inner wall of the base lug plate housing.

Furthermore, a base side edge plate for positioning a side edge of the belt extends from a side edge of the belt buckle base plate, and the base side edge plate is provided with a plurality of holes.

Furthermore, one side that is of the belt buckle base plate and that is far away from the swing handle housing is provided with a plurality of seat plate rivet bosses passing through the belt, and rivets for pressing and fixing the belt are mounted on the seat plate rivet bosses in a fitting manner.

Furthermore, one side that is of the swing handle housing and that is close to the belt is provided with a plurality of grooves, and a shape of the grooves is adapted to a shape of human fingers.

The present invention further provides a weightlifting belt, which comprises a belt buckle assembly for winding a connection band, a belt body, a connection band mounting seat and the connection band, wherein the belt buckle assembly is fixed at an end part of the belt body, the connection band mounting seat is fixed at the other end of the belt body, and the connection band is fixedly connected to the connection band mounting seat.

Furthermore, a band seat groove cavity is arranged at a back side of the connection band mounting seat, a plurality of band seat rivet bosses for passing through the belt body are distributed and extended in the band seat groove cavity, rivets for pressing and fixing the belt body are also mounted on the band seat rivet bosses in a fitting manner, a band body through slot communicated with the band seat groove cavity is further provided at a side end of the connection band mounting seat, and an end part of the connection band passes through and is fixed in the band body through slot.

3. Beneficial Effects

Compared with the existing well-known technology, the used technical solutions provided by the present invention have the following beneficial effects.

The present invention has a reasonable structural design, and the structural design of the belt buckle assembly is relatively simple, so that the assembly is more convenient, and the production and manufacturing efficiency is favorably improved; most parts are hidden inside, so that the overall appearance and shape are better; in addition, this structural design is more ergonomic and is more convenient to operate and adjust, and meanwhile, through the radial and axial movement of an unlocking member under the pushing of the button, the ratchet wheel and the pin shaft member can be locked or unlocked conveniently, so that the use is convenient.

The reference numerals in the drawings are indicated as follows:

DETAILED DESCRIPTION OF EMBODIMENTS

The following detailed description of exemplary embodiments of the present invention refers to the accompanying drawings, which form a part of the description. Exemplary embodiments in which the present invention can be implemented are shown by way of example in the accompanying drawings, wherein elements and features of the present invention are identified by reference numerals. The following more detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention as claimed, but is presented for purposes of illustration only and is not limited to the description of the features and characteristics of the present invention, to set forth the best mode of implementing the present invention, and to sufficiently enable those skilled in the art to practice the present invention.

This embodiment provides a weightlifting belt, as shown inFIG.1, which comprises a belt body300, a connection band mounting seat200, a connection band400, and a belt buckle assembly100for winding the connection band400, wherein the connection band mounting seat200is fixedly mounted on an outer wall of a left end of the belt body300, the connection band400is fixedly connected to the connection band mounting seat200, the connection band400provided on the connection band mounting seat200passes through the band body through hole31formed on the pin shaft member3, and the swing handle housing2rotates to tighten and lock the connection band400. According to the weightlifting belt in this embodiment, a user rotates the swing handle housing2to drive the pin shaft member3to rotate, and the connection band400is wound on the pin shaft member3, thereby tightening the belt body300.

Further, with reference toFIG.9, a band seat groove cavity201is arranged at a back side of the connection band mounting seat200, a plurality of band seat rivet bosses202for passing through the belt body300are distributed and extended in the band seat groove cavity201, and rivets for pressing and fixing the belt body300are also mounted on the band seat rivet bosses202in a fitting manner, so that the assembly and manufacture of the connection band mounting seat200and the belt body300are convenient. A band body through slot203communicated with the band seat groove cavity201is further provided at a side end of the connection band mounting seat200, and an end part of the connection band400passes through and is fixed in the band body through slot203. In this embodiment, after the end part of the connection band400passes through the band body through slot203, the end part can be sewn and fixed with the connection band400, or the connection band400can be folded into a folded part with a thickness much larger than a thickness of the band body through slot203, so that the connection band400cannot be pulled out from the band body through slot203.

With reference toFIGS.2to4, this embodiment further provides a belt buckle assembly, which comprises a belt buckle base plate1for fixedly connecting to the end part of the belt body300, a pin shaft member3, a ratchet wheel6, a handle ratchet7, a button assembly5, and a swing handle housing2, wherein a pair of handle lug plate housings21that rotatably fit at two ends of the pin shaft member3extend from an end part of the swing handle housing2, a pair of base lug plate housings12extend from a front surface of the belt buckle base plate1, the pin shaft member3is rotatably mounted in the base lug plate housing12, and a belt body through hole31for an end part of the connection band400to pass through is formed in the pin shaft member3. The belt buckle assembly further comprises a ratchet wheel unlocking mechanism. In this embodiment, the ratchet wheel unlocking mechanism uses a button assembly5comprising a limiting sleeve52, a short shaft32extends from a lower end of the pin shaft member3, the button assembly5is slidably and axially sleeved on the short shaft32, a ratchet wheel6is movably sleeved on the button assembly5, the ratchet wheel6is limited and arranged in the handle lug plate housing21below, a plurality of unlocking slots61are distributed in an inner side end face of the ratchet wheel6, a plurality of convex parts53fitting the unlocking slots61are distributed in an inner side end face of the button assembly5, a button spring groove34is formed in a lower end face of the short shaft32, a button spring is arranged in the button spring groove34, and a lower end of the button spring is connected against an upper end face of the button assembly5. In this embodiment, the button assembly5is movably sleeved in the unlocking slot61of the ratchet wheel6through the limiting sleeve52. The button spring will press against the button assembly5, and the convex part53is engaged into the unlocking slot61of the ratchet wheel6, such that the ratchet wheel6, the button assembly5and the pin shaft member3cannot rotate clockwise.

This embodiment further defines a specific structure of the button assembly5, the button assembly5comprises a button, a limiting sleeve52and a button nut51, a button stud extends from an inner end of the button, the button stud movably passes through a center hole of an end face of the limiting sleeve52and is connected to the button nut51in a threaded fit manner, and the convex parts53are distributed on an outer circumferential wall of an upper end of the limiting sleeve52.

The button nut51in this embodiment only axially limits the limiting sleeve52, and does not lock the limiting sleeve52. Apparently, the limiting sleeve52can rotate relative to the button, when the button is pressed by a finger, the connection band400is pulled, and since the limiting sleeve52can rotate relative to the button, the connection band400can be easily pulled with a small force; if the limiting sleeve52is locked by the button nut51, when the connection band400is pulled, the friction between the pressed button and the finger needs to be overcome, and the connection band400is not convenient to be loosened.

The sleeve rib parts54are distributed and arranged on an inner wall of the limiting sleeve52, and axial guide grooves fitting the sleeve rib parts54are distributed and arranged on an outer wall of a short shaft32. The limiting sleeve52can only slide axially relative to the short shaft32under the fitting of the sleeve rib part54and the axial guide groove.

Apparently, in an alternative solution, the limiting sleeve52and the button in this embodiment may be made as an integrally formed component, and for facilitating the rotation of the limiting sleeve52, a ball may be embedded on an outer end face of the button. When the disassembly is performed to loosen the connection band, the ball can be directly pressed.

The handle ratchet7is rotatably mounted in the handle lug plate housing21below through the handle ratchet shaft72, a tooth end of the handle ratchet7is embedded in the ratchet wheel tooth groove of the ratchet wheel6, a handle ratchet spring groove71is provided on an outer side wall of the handle ratchet7, a handle ratchet spring (not shown in the figure) is arranged in the handle ratchet spring groove71, and the other end of the handle ratchet spring is connected against an inner wall of the handle lug plate housing21. The handle ratchet spring presses against the handle ratchet7, so that the end part of the handle ratchet7is embedded into the ratchet wheel tooth groove of the ratchet wheel6, and the clockwise rotation of the ratchet wheel6can be effectively limited. In this embodiment, each handle lug plate housing21is composed of two lug plates211, the two lug plates211are fixed on the swing handle housing2and extend outward, a gap is provided between the two lug plates211, and a size of the gap is equal to a width of handle ratchet7. By reserving the gap between the two lug plates211, the handle ratchet7can be engaged with the ratchet wheel6through the gap.

When an end part of the connection band400is inserted into the band body through hole31, the swing handle housing2is pulled outward, and the handle ratchet7inside the swing handle housing2will push the ratchet wheel6to rotate counterclockwise; and since the unlocking slot61of the ratchet wheel6is engaged with the convex part53of the button assembly5, the ratchet wheel6will rotate with the button assembly5, and the button assembly5will drive the pin shaft member3to rotate counterclockwise, so that the connection band400is gradually wound around the pin shaft member3.

The base side edge plates11for positioning side edges of the belt body300extend from upper and lower side edges of the belt buckle base plate1. This structural design is reasonable and facilitates preliminary positioning of the end part of the belt body300when wearing the belt body300, which is beneficial to subsequent operations.

The belt buckle assembly100in this embodiment has a relatively simple structural design, so that the assembly is more convenient, and the production and manufacturing efficiency is favorably improved; most parts are hidden inside, so that the overall appearance and shape are better; in addition, this structural design is more ergonomic and is more convenient to operate and adjust.

In a further solution, this embodiment further comprises a seat plate ratchet8, the seat plate ratchet8is rotatably mounted in the base lug plate housing12below through a seat plate ratchet shaft81, a tooth end of the seat plate ratchet8is also embedded into the ratchet wheel tooth groove of the ratchet wheel6, an outer side wall of the seat plate ratchet8is provided with a seat plate ratchet spring groove, a seat plate ratchet spring is arranged in the seat plate ratchet spring groove, and the other end of the seat plate ratchet spring is connected against an inner wall of the base lug plate housing12.

The seat plate ratchet8is provided to further limit the ratchet wheel6, and when the handle lug plate housing21is pulled inward, the handle ratchet7jumps from one ratchet wheel tooth groove of the ratchet wheel6to the next ratchet wheel tooth groove, and if there is no further limitation of the seat plate ratchet8, the friction between the handle ratchet7and the ratchet wheel6may cause the ratchet wheel6to rotate together, thereby possibly unwinding the wound connection band400.

Two ends of the pin shaft member3are sleeved with shaft sleeves33, and the handle lug plate housing21is connected to the shaft sleeve33in a rotating fit manner.

An upper end part of the pin shaft member3is connected to an end part pin4for limiting the handle lug plate housing21in a threaded fit manner. This structure design is reasonable and convenient for disassembly and assembly.

The working principle of this embodiment is as follows: when the belt is used, the belt body300is wrapped around the waist of a human body, a left end of the belt body300is inserted between the two base side edge plates11, one hand is used to press the left end of the belt body300and the belt buckle base plate1, the other hand is used to insert the end part of the connection band400into the band body through hole31, then the swing handle housing2is pulled back and forth, the connection band400can be gradually wound by the pin shaft member3, and along with the tightening of the connection band400, the belt body300can be tightly bound on the waist of the human body.

When the connection band needs to be loosened, the button assembly5is pressed against an elastic force of the button spring, so that the convex part53of the button assembly5is disengaged from the unlocking slot61of the ratchet wheel6. In this case, the button assembly5is no longer locked by the ratchet wheel6, that is, the pin shaft member3can rotate freely; and then, the connection band400is pulled, the connection band400can be gradually unwound until the connection band400is completely disengaged from the pin shaft member3, and the belt body300can be detached.

The belt buckle assembly100in this embodiment has a relatively simple structural design, so that the assembly is more convenient, and the production and manufacturing efficiency is favorably improved; most parts are hidden inside, so that the overall appearance and shape are better; in addition, this structural design is more ergonomic and is more convenient to operate and adjust.

With reference toFIGS.5to7, the belt buckle assembly of this embodiment has substantially the same structure as that of Embodiment 1, except that a ratchet wheel unlocking mechanism for the pin shaft member3and the ratchet wheel6of this embodiment is different from that of Embodiment 1. In this embodiment, the ratchet wheel unlocking mechanism uses an unlocking member35, and the unlocking member35moves radially along the pin shaft member3to lock or unlock the pin shaft member3and the ratchet wheel6.

The pin shaft member3is provided with a button hole along an axial direction, the button assembly5is mounted in the button hole, the button assembly5can drive to stretch and retract to complete the unlocking action, and an unlocking hole formed in a peripheral surface of the pin shaft member3is communicated with the button hole. Specifically, in this embodiment, a short shaft32with a certain length extends outward from one end of the pin shaft member3, the short shaft32is hollow, and a cavity with a closed end and an open end is formed inside the short shaft, and the cavity is a button hole for mounting the button assembly5. The unlocking member35is movably mounted on a side wall of the short shaft32(i.e., a side wall of the button hole), and in this embodiment, the unlocking member35is a ball, but is not limited to a ball, and may also be in other shapes such as a cylinder and a prism, and as long as an unlocking hole for the unlocking member35to move is formed on the side wall of the short shaft32, the unlocking member35may be in any shape.

In this embodiment, the button assembly5comprises a locking part56and a releasing part57axially arranged in sections; the button assembly5axially moves along the button hole, and outer peripheral surfaces of the locking part56and the releasing part57of the button assembly can be separately in contact fit with the unlocking member35; when the outer peripheral surface of the locking part56of the button assembly5is in contact fit with the unlocking member35, the unlocking member35protrudes out of a surface of the unlocking hole of the pin shaft member3, so that the ratchet wheel6is locked; and when the outer peripheral surface of the releasing part57of the button assembly5is in contact fit with the unlocking member35, the unlocking member35is completely positioned in the unlocking hole of the pin shaft member3, so that the ratchet wheel6is unlocked. Specifically, in this embodiment, a thickness of a side wall of the cavity is less than a length of the unlocking member35along a radial direction of an end face of the pin shaft member3, i.e., in this embodiment, the thickness of the side wall of the cavity is less than a diameter of the ball. In this embodiment, the thickness of the side wall of the cavity is less than the diameter of the ball, so that when a part of the unlocking member35is embedded into the unlocking slot61of the ratchet wheel6, another part of the unlocking member is always positioned in the side wall of the button hole, and the pin shaft member3and the ratchet wheel6can be firmly connected without relative rotation. Meanwhile, in this embodiment, the locking part56and the releasing part57are both cylinders and are integrally formed, a diameter of the locking part56is greater than that of the releasing part57, and a transition arc-shaped surface58is arranged between the locking part56and the releasing part57(seeFIG.10). For a better function of the locking part56, a circumferential surface of the locking part abuts against an inner wall of the cavity. In this embodiment, the locking part56is closer to the closed end of the cavity than the releasing part57, and the button assembly5extends out of the pin shaft member3through the connecting part55and is fixedly connected to the button.

The elastic member is arranged between inner ends of the unlocking member35in the button hole of the pin shaft member3. In this embodiment, the button assembly5is arranged in the cavity at an end part of the pin shaft member3, a spring is arranged between the closed end of the cavity and the button assembly5; when locking is needed, the spring ejects the button assembly5outwards, so that the locking part56abuts against the unlocking member35, the unlocking member35is pushed out of the cavity and is embedded into an unlocking slot61on the ratchet wheel6, and the pin shaft member3and the ratchet wheel6are fixed; and when the unblocking is needed, the spring contracts inward, so that the releasing part57is positioned at the unlocking member35, the unlocking member35is retracted into the cavity, the pin shaft member3is disengaged from the ratchet wheel6, and the locking and unlocking can be completed by simply pushing the button assembly5, which is convenient to use. A button is arranged at an outer end of the button assembly5and protrudes out of the end face of the pin shaft member3; and the outer peripheral surface of the locking part56of the button assembly5has an arc-shaped surface fitting a spherical surface of the unlocking member35.

In order to prevent the unlocking member35from being partially positioned in the unlocking slot61under the action of gravity after unlocking, which causes that the pin shaft member3and the ratchet wheel6are still fixed together, in this embodiment, a maximum distance that the unlocking member35extends out of the unlocking hole is less than a radius of a sphere, and therefore when the pin shaft member3and the ratchet wheel6rotate relatively after unlocking, the unlocking member35can naturally retract into the unlocking hole.

In this embodiment, in order to more firmly lock the pin shaft member3and the ratchet wheel6, a plurality of unlocking holes are arranged at intervals along the outer peripheral surface of the pin shaft member3, and one unlocking member35is mounted in each unlocking hole; and the ratchet wheel6is provided with corresponding unlocking slots61corresponding to the unlocking holes, and a limiting protrusion is arranged between every two unlocking slots61. Such an arrangement allows the unlocking member35to be engaged into the unlocking slot61after extending. The limiting protrusions on two sides of the unlocking slot61limit the movement of the unlocking member35to ensure the relative fixation between the ratchet wheel6and the pin shaft member3.

Further, in this embodiment, a pair of base lug plate housings12extend outward from one side surface of the belt buckle base plate1, and the base lug plate housings12are divided into a first portion and a second portion, wherein the first portion has a thickness that is greater than that of the second portion. Specifically, in this embodiment, the base lug plate housings12are respectively arranged close to two sides of the belt buckle base plate1, and a space having a certain length is reserved in the middle, and the length of the space is set according to a length of the connection band400, and is generally set to be equal to or slightly greater than the length of the connection band400. The base lug plate housing12is in a shape of a “7”, the first portion and the second portion are integrally formed, and the first portion has a thickness that is greater than that of the second portion. In this embodiment, the first portion is referred to as a pawl mounting seat121, and the second portion is referred to as a thin wall portion122, hereinafter the same below.

The pin shaft member3is rotatably mounted in the base lug plate housing12, the pin shaft member3is mounted on the thin wall portion122of the base lug plate housing12through a shaft sleeve33, and a length of the pin shaft member3is greater than an interval length between the two base lug plate housings12. Two ends of the pin shaft member3extend outward through the thin wall portion122, and one end is fixed by the end part pin4and the other end is a locking mechanism. In this embodiment, the end part pin4is a bolt. After tightening, the pin shaft member3is fixed. The pin shaft member3can rotate along the end part pin4as an axis.

Further, a band body through hole31for an end part of the connection band400to pass through is formed in the pin shaft member3, and a length of the band body through hole31is the same as that of the connection band400.

In this embodiment, the pin shaft member3is connected to the swing handle housing2through a belt locking mechanism. The belt locking mechanism extends out of the thin wall portion122, and the connection band400is wound and locked through the fitting of the ratchet wheel6and the handle ratchet7with the belt locking mechanism.

Further, the seat plate ratchet8is provided inside the pawl mounting seat121, and the seat plate ratchet8is rotatably mounted on the pawl mounting seat121by the seat plate ratchet shaft81. The specific structure and mounting manner of the seat plate ratchet8are the same as those of the seat plate ratchet8in Embodiment 1.

In this embodiment, a base side edge plate11for positioning a side of the belt body300extends from a side edge of the belt buckle base plate1, and the base side edge plate11is provided with a plurality of holes. In this embodiment, the base side edge plates11for positioning side edges of the belt body300extend from upper and lower side edges of the belt buckle base plate1. This structural design is reasonable and facilitates preliminary positioning of the end part of the belt body300when wearing the belt body300, which is beneficial to subsequent operations. One side that is of the belt buckle base plate1and that is far away from the swing handle housing2is provided with a plurality of seat plate rivet bosses13passing through the belt body300, and rivets for pressing and fixing the belt body300are arranged on the seat plate rivet bosses13in a fitting manner. One side that is of the swing handle housing2and that is close to the belt body300is provided with a plurality of grooves22, and a shape of the grooves22is adapted to a shape of human fingers, so as to facilitate the application of force by the fingers of a user (seeFIG.8).

The working principle of this embodiment is as follows: when the belt is used, the belt body300is wrapped around the waist of a human body, a left end of the belt body300is inserted between the two base side edge plates11, one hand is used to press the left end of the belt body300and the belt buckle base plate1, the other hand is used to insert the end part of the connection band400into the band body through hole31, then the swing handle housing2is pulled back and forth, the connection band400can be gradually wound by the pin shaft member3, and along with the tightening of the connection band400, the belt body300can be tightly bound on the waist of the human body.

When the belt needs to be loosened, an elastic force of the elastic member is overcome, and the button assembly5is pressed, causing the locking part56of the button assembly5to leave the unlocking member35, the releasing part57is displaced to the unlocking member35, and the unlocking member35can be retracted into the cavity; in this case, the pin shaft member3is no longer locked by the ratchet wheel6, that is, the pin shaft member3can rotate freely; and then, the connection band400is pulled, the connection band400can be gradually unwound until the connection band400is completely disengaged from the pin shaft member3, and the belt body300can be detached.

The present invention and embodiments thereof have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, similar structural forms and embodiments to the technical solution, which are designed according to inspiration of the accompanying drawings by those of ordinary skill in the art, without departing from the spirits of the present invention and without creative efforts, shall fall within the protection scope of the present invention.