CN219071963U - Barbell and dumbbell connecting structure and locking mechanism - Google Patents

Abstract

The present disclosure relates to a connection structure of barbell and dumbbell, comprising: barbell bar, dumbbell bar and latch mechanism. The dumbbell comprises a dumbbell rod, wherein a groove extending along the circumferential direction of the dumbbell rod is formed in the outer wall of the dumbbell rod, and a locking mechanism is configured to lock the barbell rod and the dumbbell rod together. The locking mechanism comprises a locking body and a movable part hinged on the locking body, wherein the locking body is provided with a hollow cavity sleeved on the barbell bar and the dumbbell bar, the movable part is configured to move between a locking position and an unlocking position relative to the locking body, and when the locking mechanism is positioned at the locking position, a flange arranged on the inner wall of the movable part is configured to be clamped with the groove; when in the unlocked position, the flange provided on the inner wall of the movable portion is configured to disengage from the groove. The connection structure can rapidly finish the switching of the dumbbell and the barbell.

Description

Barbell and dumbbell connecting structure and locking mechanism

Technical Field

The present disclosure relates to the technical field of sports apparatuses, and in particular, to a connection structure of a barbell and a dumbbell; the present disclosure also relates to a latch mechanism.

Background

With the improvement of living standard, more and more people begin to exercise. The body building not only can strengthen physique, but also can shape the body building. The common body-building equipment comprises a barbell and a dumbbell, and the two body-building equipment is used for core training, so that muscle strength can be enhanced, and coordination of a body can be promoted. In order to meet the training requirements of different stages, the balance weight is required to be continuously adjusted to perform stage training in the training process, and a dumbbell and a barbell are required to be used in a switching mode.

However, the traditional dumbbell and barbell have the problem that the balance weight adjustment is inconvenient, the two can not be mutually converted, two fitness equipment must be purchased to meet the use requirement, and the problems of high purchase cost, unfavorable storage and the like exist.

Disclosure of Invention

The utility model provides a connection structure and latch mechanism of barbell, dumbbell in order to solve the problem that exists among the prior art.

According to a first aspect of the present disclosure, there is provided a connection structure of a barbell and a dumbbell, including:

a barbell bar;

the dumbbell comprises a dumbbell rod, wherein a groove extending along the circumferential direction of the dumbbell rod is formed in the outer wall of the dumbbell rod;

a latch mechanism configured to latch the barbell bar and dumbbell bar together; the locking mechanism comprises a locking body and a movable part hinged on the locking body; the lock catch body is provided with a hollow cavity which is sleeved on the barbell bar and the dumbbell bar; the movable portion is configured to move between a locked position and an unlocked position relative to the latch body;

when the locking position is located, the flange arranged on the inner wall of the movable part is clamped with the groove;

when in the unlocked position, the flange provided on the inner wall of the movable portion is configured to disengage from the groove.

In one embodiment of the disclosure, the outer wall of the lock catch body is provided with a slot penetrating through the cavity, and the movable part is hinged in the slot of the lock catch body.

In one embodiment of the present disclosure, the movable portion is configured to engage with the slot when in the locked position, and the movable portion has a profile that is adapted to the latch body.

In one embodiment of the disclosure, the movable part comprises a first locking piece and a second locking piece which are respectively hinged in the slot of the lock catch body; the first locking block and the second locking block are configured to be distributed in the circumferential direction of the lock catch body; the movable part also comprises a connecting locking piece which is positioned between the first locking piece and the second locking piece and is respectively hinged with the first locking piece and the second locking piece;

when being located the closure position, the articulated axis of first locking piece and hasp body, the articulated axis of connection locking piece and first locking piece, the articulated axis of second locking piece and hasp body, the articulated axis of connection locking piece and second locking piece distributes in proper order in the circumference direction of hasp body.

In one embodiment of the present disclosure, the inner wall of the first locking block is configured to compress against the outer wall of the dumbbell bar when in the locked position.

In one embodiment of the disclosure, a handle groove is disposed on the latch body at a position corresponding to the free end of the second locking piece.

In one embodiment of the present disclosure, the flange is provided at least on an inner wall of the first lock block.

In one embodiment of the present disclosure, the groove is configured as an annular groove around the entire circumferential direction of the dumbbell bar.

In one embodiment of the present disclosure, the plurality of grooves are provided, and the plurality of grooves are distributed at intervals in the axial direction of the dumbbell rod.

In one embodiment of the present disclosure, the barbell bar is configured to be secured within a hollow cavity of the latch body; the flange is configured to correspond to the location of the recess when the dumbbell rod is mated with the hollow cavity.

In one embodiment of the present disclosure, the flanges are configured to correspond to the locations of the grooves on the dumbbell bar when the dumbbell bar is threaded into the hollow cavity to mate the dumbbell pieces with the end faces of the latch body.

In one embodiment of the present disclosure, the outer wall of the dumbbell rod is provided with an axial slot extending in the axial direction of the dumbbell rod, the axial slot being configured for guided engagement with the protrusions provided in the dumbbell sheet through holes.

In one embodiment of the present disclosure, a quick release mechanism for securing to the dumbbell bar is further included, the quick release mechanism configured to limit axial displacement of the dumbbell sheet on the dumbbell bar.

In one embodiment of the disclosure, the quick release mechanism comprises a non-closed annular clamp body and a connecting rod mechanism hinged at two end positions of the clamp body, wherein the connecting rod mechanism is configured to lock the clamp body when rotated to a first position; and when the clamp rotates to the second position, the clamp body is loosened.

According to a second aspect of the present disclosure, there is also provided a latch mechanism including a latch body and a movable portion hinged to the latch body; the lock catch body is provided with a hollow cavity which is sleeved on the first rod piece and the second rod piece; the movable portion is configured to move between a locked position and an unlocked position relative to the latch body;

when the locking position is located, the flange arranged on the inner wall of the movable part is clamped with the groove which is arranged on the second rod piece and extends along the circumferential direction of the second rod piece;

when in the unlocked position, the flange provided on the inner wall of the movable portion is configured to disengage from the groove.

The dumbbell and the barbell can be flexibly switched. The user only needs to connect or disconnect the barbell bar and the dumbbell bar through the locking mechanism, so that the barbell and the dumbbell can be flexibly switched and used, and various exercise effects are realized. In addition, two dumbbell can be assembled together to form the barbell through one barbell bar, so that a user does not need to purchase additional barbells any more, and the cost of purchasing equipment and the space for accommodating various equipment can be saved.

Other features of the present disclosure and its advantages will become apparent from the following detailed description of exemplary embodiments of the disclosure, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic structural view of a connection structure of a barbell and dumbbell of the present disclosure;

FIG. 2 is a cross-sectional view of the connection structure of the barbell, dumbbell of the present disclosure;

FIG. 3 is a schematic structural view of a latch structure of the present disclosure;

FIG. 4 is a schematic structural view of a latch body of the present disclosure;

FIG. 5 is a schematic view of the structure of the movable part of the present disclosure;

FIG. 6 is a schematic structural view of a dumbbell portion of this disclosure;

FIG. 7 is a schematic view of the structure of a dumbbell sheet of this disclosure;

fig. 8 is a schematic structural view of the quick release mechanism of the present disclosure.

The one-to-one correspondence between the component names and the reference numerals in fig. 1 to 8 is as follows:

1. barbell bar, 2. Dumbbell bar, 21. Recess, 22. Axial slot, 23. Hand-held portion, 3. Latch mechanism, 31. Latch body, 311. Hollow cavity, 312. Slot, 32. Movable portion, 321. First locking block, 322. Second locking block, 3221. Handle slot, 323. Connecting locking block, 324. Flange, 4. Dumbbell plate, 41. Protrusion, 5. Quick release mechanism, 51. Clamp body, 52. Link mechanism

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used merely to indicate relative positional relationships between the relevant portions, and do not limit the absolute positions of the relevant portions.

Herein, "first", "second", etc. are used only for distinguishing one another, and do not denote any order or importance, but rather denote a prerequisite of presence.

The dumbbell and the barbell are common fitness equipment, so that a user needs to continuously adjust the balance weight to perform staged training in order to adapt to training requirements of different stages, and the dumbbell and the barbell are required to be used in a switching mode. The traditional dumbbell and barbell can not be mutually converted, and a user must purchase two fitness equipment to meet the use requirement. Therefore, the existing dumbbell and barbell have the problems of high purchase cost, unfavorable storage and the like.

For this reason, this disclosure provides a connection structure of barbell, dumbbell, including barbell pole, dumbbell pole and latch mechanism. The dumbbell comprises a dumbbell rod, wherein a groove extending along the circumferential direction of the dumbbell rod is formed in the outer wall of the dumbbell rod, and a locking mechanism is configured to lock the barbell rod and the dumbbell rod together. The latch mechanism comprises a latch body and a movable part hinged on the latch body, wherein the latch body is provided with a hollow cavity which is sleeved on the barbell bar and the dumbbell bar, a slot which penetrates through the hollow cavity is formed in the outer wall of the latch body, and the movable part is connected in the slot and is provided with a profile which is matched with the latch body. The movable part is configured to move between a locking position and an unlocking position relative to the lock catch body, and when the movable part is positioned at the locking position, a flange arranged on the inner wall of the movable part is configured to be clamped with the groove; when in the unlocked position, the flange provided on the inner wall of the movable portion is configured to disengage from the groove.

In the training process, when a user needs to use the barbell, one end of the dumbbell rod is inserted into the hollow cavity of the locking mechanism at the unlocking position, after the dumbbell rod is matched in place, the movable part is driven to move to the locking position, the flange arranged on the inner wall of the movable part is clamped with the groove arranged on the dumbbell rod, and therefore the dumbbell rod and the barbell rod are locked together through the locking mechanism. Obviously, the two ends of the barbell are symmetrical structures, and one barbell rod is matched with the two dumbbell rods, so that the dumbbell can be converted into the barbell by repeating the operation for the other dumbbell rod once and locking the other dumbbell rod to the other side of the barbell rod. On the contrary, when a user needs to use the dumbbell, the movable part is driven to move to the unlocking position, and the two dumbbell rods are respectively pulled out of the hollow cavities of the locking mechanisms fixed at the two ends of the barbell rods, so that the barbell can be converted into the dumbbell.

According to the connecting structure of the barbell and the dumbbell, the dumbbell rod is locked on the barbell rod through the locking mechanism, so that the dumbbell can be converted into the barbell, or the locking mechanism is driven to unlock so as to separate the dumbbell rod from the barbell rod, so that the dumbbell can be converted into the dumbbell. That is, the latch mechanism is configured to latch or disengage the barbell bar from the dumbbell bar to complete the transition between barbell and dumbbell.

Therefore, a user only needs to purchase a set of barbell and a set of connecting structure of the dumbbell, the dumbbell or the barbell can be replaced according to the self training requirement, and the set can be placed in a smaller space, so that the purchase cost and the storage difficulty of the dumbbell and the barbell are reduced.

In one embodiment of the present disclosure, the grooves on the dumbbell rod are configured as a plurality of annular grooves spaced apart in the axial direction of the dumbbell rod, and the outer wall of the dumbbell rod is further provided with axial grooves extending along the axial direction of the dumbbell rod, and the axial grooves are configured for guiding engagement with the protrusions disposed in the through holes of the dumbbell piece. The annular groove is arranged, so that the locking mechanism does not need to be aligned in the circumferential direction of the dumbbell rod when being locked, and the locking process is simpler and more convenient; the arrangement of the annular grooves which are distributed at intervals can be better suitable for dumbbell pieces with different numbers; the arrangement of the axial grooves and the protrusions enables the installation of the dumbbell piece to be guided, the dumbbell piece is very simple and convenient, the dumbbell piece after installation is limited to rotate by the axial grooves, and stability and safety are enhanced.

In one embodiment of the present disclosure, the dumbbell rod is further fixed with a quick release mechanism, which includes a clamp body and a link mechanism. The quick release mechanism is configured to limit axial displacement of the dumbbell sheet on the dumbbell bar. When the connecting rod mechanism loosens the clamp body, the quick-release mechanism is separated from the dumbbell rod, so that the dumbbell piece can be freely dismounted; when the connecting rod mechanism locks the clamp body, the quick-release mechanism can be tightly held on the dumbbell rod to prop against the dumbbell piece at the outermost end, so that the dumbbell piece is prevented from falling off. The arrangement of the quick-release mechanism enhances the stability and the safety.

The utility model discloses a connection structure of barbell, dumbbell through latch mechanism and the recess of setting on the dumbbell pole rather than complex mode, makes the user can change barbell and dumbbell in a flexible way according to self demand to the acquisition cost and the accomodating degree of difficulty of dumbbell and barbell have been reduced.

Specific embodiments of the present disclosure are described below with reference to fig. 1 through 8 of the drawings.

As shown in fig. 1 and 2, the connection structure of a barbell and a dumbbell provided by the present disclosure includes a barbell bar 1, a dumbbell bar 2 and a latch mechanism 3. The dumbbell bar 2 can be locked on the barbell bar 1 through the locking mechanism 3, so that the barbell can be assembled for use. Of course, for those skilled in the art, the dumbbell is usually provided with two dumbbell pieces, and two ends of the barbell are symmetrical, so that two ends of the barbell bar 1 are locked with the barbell bar 1 through the locking mechanism 3 respectively. The opposite structure of the barbell bar 1 is identical, and only the connection structure of one end thereof will be described herein.

The dumbbell bar 2 of the present disclosure may be a dumbbell bar 2 of a conventional dumbbell mechanism, with dumbbell sheets 4 provided on opposite sides of the dumbbell bar 2. The middle part of the dumbbell bar 2 is provided with a holding part 23, the surface of the holding part 23 is provided with an anti-slip texture, and a user can hold the holding part 23 to lift the dumbbell for exercise. Wherein a groove 21 is provided on the dumbbell bar 2. Wherein the grooves 21 are provided on the dumbbell bar 2 at positions outside the dumbbell pieces 4, which are configured on the outer wall of the dumbbell bar 2, extending in the circumferential direction of the dumbbell bar 2.

Referring to fig. 1 to 4, a latch mechanism 3 is used to latch barbell bar 1 and dumbbell bar 2 together. The latch mechanism 3 includes: a latch body 31 and a movable portion 32 hinged to the latch body 31. The movable portion 32 is configured to move relative to the latch body 31 between a latched position and an unlatched position. When the movable part 32 rotates to a locking position relative to the lock catch body 31, the dumbbell rod 2 is locked; when the movable part 32 rotates to the unlocking position relative to the latch body 31, the dumbbell rod 2 can be separated from the latch body 31.

In detail, the latch body 31 may have a cylindrical shape as a whole, with a hollow cavity 311 for being sleeved on the barbell bar 1 and the dumbbell bar 2. The hollow cavity 311 penetrates opposite ends of the latch body 31. In this embodiment, the inner diameter of the hollow cavity 311 is set to be slightly larger than the outer diameters of the barbell bar 1 and the dumbbell bar 2, so that the barbell bar 1 and the dumbbell bar 2 can extend into the hollow cavity 311 of the latch body 31, and the hollow cavity 311 can tightly sleeve the two bars together.

The outer wall of the latch body 31 is provided with a slot 312, the slot 312 is penetrated to the hollow cavity 311 from the outer wall of the latch body 31, and the movable portion 32 is hinged in the slot 312, so that the movable portion 32 can rotate in the slot 312 to a locking position and an unlocking position relative to the latch body 31.

Referring to fig. 2 and 5, a flange 324 is provided on the inner wall of the movable portion 32. The flange 324 is configured to fit into the recess 21 and to be snapped together. When the dumbbell rod 2 is inserted into the hollow cavity 311 with a proper depth and the movable part 32 moves to the locking position relative to the lock catch body 31, the flange 324 extends into the hollow cavity 311 of the lock catch body 31 and is clamped with the groove 21, so that the dumbbell rod 2 is tightly connected with the lock catch mechanism 3; when the movable part 32 moves to the unlocking position relative to the latch body 31, the flange 324 is separated from the groove 21, so that the dumbbell rod 2 can be pulled out of the hollow cavity 311, and the dumbbell rod 2 is separated from the latch body 31.

That is, by driving the movable portion 32 to perform position switching, locking and separation between the dumbbell bar 2 and the latch mechanism 3 are achieved. Further, because the barbell bar 1 and the locking mechanism 3 are locked together, the dumbbell bar 2 is switched in position by driving the movable part 32, so that the dumbbell bar 2 and the barbell bar 1 are connected and separated.

In one embodiment of the present disclosure, the barbell bar 1 of the present disclosure extends into the hollow cavity 311 of the latch body 31 and is fixedly coupled with the latch body 31 in a manner well known to those skilled in the art. The connection may be made, for example, by means of threads, or the two may be permanently fixed together by means of welding. When the dumbbell is assembled, the dumbbell rod 2 and the locking mechanism 3 are locked together, so that the barbell is assembled, and a user can exercise by holding the barbell by hand. After removing the dumbbell bar 2 from the latch mechanism 3, the user can exercise through the dumbbell. The locking mechanism 3 is fixed on the barbell bar 1, so that the locking mechanism 3 can be prevented from being lost.

The movable part 32 of the present disclosure can rotate to a locking position in the slot 312, and when the movable part 32 is located at the locking position, the movable part 32 rotates to the slot 312 and is clamped in the slot 312 and cannot be separated from the clamping slot 312, so that the flange 324 on the inner wall of the movable part 32 can be clamped with the groove 21 on the dumbbell rod 2 and cannot be separated from the groove 21. When the movable part 32 rotates to the unlocking position, the movable part 32 rotates to leave the slot 312, so that the flange 324 on the movable part 32 is separated from the groove 21 on the dumbbell rod 2, and the dumbbell rod 2 can be pulled out of the hollow cavity 311 of the lock catch body 31, and the dumbbell rod 2 is separated from the lock catch mechanism 3 and the barbell rod 1.

The movable portion 32 may be an integral body or may be composed of multiple sections, and when the movable portion 32 rotates to the unlocking position, the movable portion 32 has a profile that is adapted to the latch body 31. That is, the latch body 31 of the present disclosure has a hollow cylindrical structure, and the movable portion 32 is entirely configured in an arc shape having the same or similar curvature as the latch body 31. When the movable portion 32 is rotated into the slot 312, the movable portion 32 has the same or similar outer and/or inner profile as the latch body 31, which allows the movable portion 32 to fit together with the latch body 31.

In one embodiment of the present disclosure, as shown in fig. 5, the movable portion 32 includes a first locking piece 321, a second locking piece 322, and a connection locking piece 323. In this embodiment, the first locking piece 321 and the second locking piece 322 are both hinged on the lock catch body 31, and the two are distributed in the circumferential direction of the lock catch body 31. The connecting locking piece 323 is hinged between the first locking piece 321 and the second locking piece 322, and the three locking pieces together form a contour shape adapted to the slot 312.

Specifically, the first locking piece 321 and the second locking piece 322 are respectively hinged in the slot 312 of the lock catch body 31, and the first locking piece 321 and the second locking piece 322 are distributed in the circumferential direction of the lock catch body 31. Wherein, one end of the first locking piece 321 far away from the second locking piece 322 is hinged on the side walls of the two opposite sides of the slot 312 through a hinge shaft; the second locking piece 322 is hinged to the side walls of the opposite sides of the slot 312 by another hinge shaft adjacent to one end of the first locking piece 321. The connecting locking piece 323 is located between the first locking piece 321 and the second locking piece 322, wherein one end of the connecting locking piece 323 is hinged with the first locking piece 321 through a hinge shaft, and the other end of the connecting locking piece 323 is hinged with the second locking piece 322 through the hinge shaft. This makes when opening the movable portion 32, the user can hold the second locking piece 322 to rotate in a direction away from the slot 312, so that the connecting locking piece 323 can be driven to move, and the connecting locking piece 323 drives the first locking piece 321 to move in a direction away from the slot 312, so that the three locking pieces move to the unlocking position. When the lock is closed, the second locking piece 322 is driven to move into the slot 312, so that the connecting locking piece 323 can be driven, and the connecting locking piece 323 drives the first locking piece 321 to move into the slot 312, so that the three locking pieces move to the locking position.

The locking and unlocking are realized through the linkage of the three locking pieces 322, so that the operation is simple, and the movable part 32 can be tightly matched with the slot 312 when being positioned at the locking position, so that accidental unlocking is avoided. Of course, according to one embodiment of the present disclosure, the movable portion 32 may also have a different number of locking pieces, different shapes, and different connection manners, which is not limited by the present disclosure.

In one embodiment of the present disclosure, when the movable portion 32 is located at the locking position, the hinge axis of the first locking piece 321 and the locking body 31, the hinge axis of the connecting locking piece 323 and the first locking piece 321, the hinge axis of the second locking piece 322 and the locking body 31, and the hinge axis of the connecting locking piece 323 and the second locking piece 322 are sequentially distributed in the circumferential direction of the locking body. By adopting the arrangement mode, a self-locking mechanism is formed among the first locking piece 321, the connecting locking piece 323 and the second locking piece 322, so that the connecting locking piece 323 can be pressed on the second locking piece 322 when in a locking position, and the second locking piece 322 can be prevented from being opened accidentally. When the user opens the second locking piece 322, since the hinge axis connecting the locking piece 323 and the second locking piece 322 is located outside the hinge axis of the second locking piece 322 and the latch body 31, the second locking piece 322 first overcomes the pressing force applied thereto by the connecting locking piece 323. When unlocking, the movement amplitude of the second locking piece 322 is maximum, the locking piece 323 is connected for a plurality of times, and the movement amplitude of the first locking piece 321 is minimum.

The flange 324 of the present disclosure may be provided on the inner wall of the first locking piece 321 because the movement amplitude of the first locking piece 321 is minimum, and the pressing force provided by the first locking piece 321 is maximum when it is in the locking position, preventing the dumbbell bar 2 from jacking up the first locking piece 321. Of course, it will be apparent to those skilled in the art from this disclosure that a flange 324 may be provided on the inner wall of the connecting lock piece 323 and/or the second lock piece 322. Alternatively, the flange 324 may extend from the first locking piece 321 to the connecting locking piece 323, or through the connecting locking piece 323 to the second locking piece 322, which is not specifically described in this disclosure.

In one embodiment of the present disclosure, the inner wall of the first locking piece 321 is configured to press against the outer wall of the dumbbell bar 2 when in the locked position, which enables the flange 324 on the first locking piece 321 to not only be clamped in the groove 21 of the dumbbell bar 2, but also enable the first locking piece 321 to apply a certain pressing force to the dumbbell bar 2, so as to avoid the dumbbell bar 2 from shaking relative to the barbell bar 1 or the latch mechanism 3 during exercise.

In one embodiment of the present disclosure, a catch groove 3221 is provided on the latch body 31 at a position corresponding to the free end of the second lock piece 322. The catch groove 3221 may facilitate a user to disengage the second lock piece 322. During specific operation, a finger of a user can extend into the handle groove 3221 and toggle the free end of the second locking piece 322 in a direction away from the groove 312, and the second locking piece 322 is lifted by taking the hinge axis of the second locking piece 322 and the lock catch body 31 as an axis; the connection locking piece 323 follows the movement of the second locking piece 322 through the hinge shaft with the second locking piece 322, and further transmits the movement to the first locking piece 321 through the hinge shaft with the first locking piece 321; the first locking piece 321 rotates with the hinge axis of the first locking piece 321 and the lock catch body 31 as a shaft, and lifts up in a direction away from the rod body. The movable portion 32 thus far achieves a movement from the locked position to the unlocked position. Similarly, to move from the unlock position to the lock position, only the second lock piece 322 needs to be pushed in the direction of the slot 312, and the second lock piece 322 drives the connecting lock piece 323 and the first lock piece 321 to hold the lock catch body 31 tightly, so as to achieve locking.

In one embodiment of the present disclosure, as shown in fig. 1 and 2, the groove 21 is configured as an annular groove around the entire circumferential direction of the dumbbell bar 2. The provision of the annular grooves makes the alignment and engagement of the flanges 324 easier, and the flanges 324 can be found and can be engaged into the grooves 21 no matter what angle the dumbbell rod 2 is inserted into the hollow cavity 311.

In one embodiment of the present disclosure, as shown in fig. 1 and 2, a plurality of grooves 21 are provided on the dumbbell rod 2, and the plurality of grooves 21 are distributed at intervals in the axial direction of the dumbbell rod 2, so that the latch mechanism 3 can be matched with different grooves 21, and thus the assembly of the dumbbell piece 4 becomes more flexible, and the flange 324 can be matched with and clamped with the groove 21 with proper position no matter how many dumbbell pieces 4 are assembled. By changing the number of dumbbell plates 4, different training weights can be adjusted to meet different training requirements.

In one embodiment of the present disclosure, barbell bar 1 is configured to be secured within hollow cavity 311 of latch body 31; when dumbbell bar 2 is mated with hollow cavity 311 in place, flange 324 on movable portion 32 is allowed to correspond to the position of recess 21. That is, the hollow cavity 311 has a limiting mechanism, and when the dumbbell rod 2 is inserted into the slot to stop with the limiting mechanism, the slot 21 on the dumbbell rod 2 is just corresponding to the flange 324 on the movable portion 32, so that the flange 324 can move to match with the slot 21 in the locking position.

In one embodiment of the present disclosure, as shown in fig. 1 and 2, flange 324 is configured to correspond to the location of recess 21 when dumbbell rod 2 is threaded into hollow cavity 311 to mate dumbbell piece 4 with the end surface of latch body 31. The arrangement ensures that a user does not need to probe the depth of the dumbbell rod 2 inserted into the hollow cavity 311 and can just engage the flange 324 with the groove 21 just by directly penetrating to the depth of the dumbbell piece 4 propped against the end face of the lock catch body 31. The mounting process of the dumbbell to the barbell is thus made easier. This requires the design of the position of the groove 21 on the dumbbell bar 2 and the thickness of the dumbbell piece 4, and no matter how many dumbbell pieces 4 are assembled on the dumbbell bar 2, as long as the dumbbell bar 2 is threaded into the hollow cavity 311 until the outermost dumbbell piece 4 is engaged with the end face of the latch body 31, a certain groove 21 on the dumbbell bar 2 will be engaged with the flange 324 on the movable portion 32. In addition, with the structure, the dumbbell piece 4 is prevented from being fixed on the dumbbell rod 2 by the additional fixing mechanism, and the dumbbell piece 4 is prevented from shaking or moving on the dumbbell rod 2.

In one embodiment of the present disclosure, as shown in fig. 6 and 7, a protrusion 41 is provided on the dumbbell piece 4, a through hole is provided at the center of the dumbbell piece 4, and the protrusion 41 is provided on the inner wall of the through hole. The protrusions 41 correspond in shape to the axial slots 22 provided on the dumbbell bar 2, enabling a guided engagement. The axial grooves 22 extend along the axial direction of the outer wall of the dumbbell bar 2, and the protrusions 41 limit the angle and direction of the dumbbell bar 4 to the dumbbell bar 2 when the dumbbell bar 4 is assembled, so that the dumbbell bar 4 can be assembled on the dumbbell bar 2 only at a fixed angle. After the dumbbell piece 4 is assembled, the dumbbell piece 4 is limited to rotate relative to the dumbbell rod 2 due to the clamping of the protrusions 41 and the axial grooves 22, so that potential safety hazards caused by rotation of the dumbbell piece 4 are eliminated. It can be seen that the guide structure formed by the protrusions 41 and the axial slots 22 facilitates the assembly of the dumbbell piece 4 and also makes the use of the dumbbell or barbell safer.

In one embodiment of the present disclosure, as shown in fig. 1, 2 and 8, further comprising a quick release mechanism 5 secured to dumbbell bar 2, quick release mechanism 5 being configured to limit axial displacement of dumbbell sheet 4 on dumbbell bar 2. Specifically, the quick release mechanism 5 includes: a clamp body 51 and a link mechanism 52 hinged to the clamp body 51. The link mechanism 52 is configured to lock the clamp body 51 when rotated to the first position; and when rotated to the second position, unclamping the clamp body 15.

In this embodiment, the clamp body 51 is in a non-closed ring structure, and the link mechanism 52 is hinged to two end positions of the clamp body 51. When the link mechanism 52 rotates to the first position, the free ends of the link mechanism 52 are tightly attached to the clamp body 51, and the two free ends of the clamp body 51 are close to each other under the drive of the link mechanism 52, namely, the clamp body 51 is locked, so that the dumbbell rod 2 is tightly held, and the dumbbell rod 4 is propped against the dumbbell piece 4 at the outermost side, and the dumbbell piece 4 is prevented from falling off from the dumbbell rod 2. When the link mechanism 52 rotates to the second position, the free ends of the link mechanism 52 are far away from the clamp body 51, so that the two free ends of the clamp body 51 are far away from each other under the elastic restoring force of the two free ends, namely, the clamp body 51 can be loosened, so that the dumbbell bar 2 can be separated, the dumbbell piece 4 is not fixed, and the dumbbell piece 4 can be freely disassembled and assembled. Of course, according to one embodiment of the present disclosure, the quick release mechanism 5 may also have different structures and movement modes, which is not limited by the present disclosure.

In one embodiment of the present disclosure, there is also provided a latch mechanism including a latch body and a movable portion hinged to the latch body; the lock catch body is provided with a hollow cavity which is sleeved on the first rod piece and the second rod piece; the movable part is configured to move between a locking position and an unlocking position relative to the lock catch body; when the movable part is positioned at the locking position, the flange arranged on the inner wall of the movable part is clamped with the groove which is arranged on the second rod piece and extends along the circumferential direction of the second rod piece; when in the unlocked position, the flange provided on the inner wall of the movable portion is configured to disengage from the groove.

The latch mechanism of the present disclosure has exactly the same structure and principle of action as the latch mechanism described in the above embodiments. The first lever in this embodiment may be a barbell lever in the above embodiment, and the second lever may be a dumbbell lever in the above embodiment. The locking mechanism of the present disclosure not only can be applied to the connection structure of the barbell and dumbbell, but also can be applied to other structures which need to be unlocked and locked quickly, including but not limited to connection of a clothes-horse, connection of a long bar, etc., and the disclosure is not limited herein.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims (15)

1. A connection structure of barbell, dumbbell, characterized by comprising:

a barbell bar (1);

the dumbbell comprises a dumbbell rod (2), wherein a groove (21) extending along the circumferential direction of the dumbbell rod (2) is formed in the outer wall of the dumbbell rod (2);

a locking mechanism (3), wherein the locking mechanism (3) is configured to lock the barbell bar (1) and the dumbbell bar (2) together; the locking mechanism (3) comprises a locking body (31) and a movable part (32) hinged on the locking body (31); the lock catch body (31) is provided with a hollow cavity (311) which is sleeved on the barbell bar (1) and the dumbbell bar (2); the movable part (32) is configured to move between a locking position and an unlocking position relative to the lock catch body (31);

when the movable part is positioned at the locking position, a flange (324) arranged on the inner wall of the movable part (32) is configured to be clamped with the groove (21);

when in the unlocked position, a flange (324) provided on the inner wall of the movable portion (32) is configured to disengage from the groove (21).

2. The connecting structure according to claim 1, wherein the outer wall of the latch body (31) is provided with a slot (312) penetrating into the cavity (311), and the movable part (32) is hinged in the slot (312) of the latch body (31).

3. The connecting structure according to claim 2, characterized in that the movable part (32) is configured to engage with the slot (312) when in the locked position, and the movable part (32) has a profile adapted to the latch body (31).

4. The connecting structure according to claim 2, wherein the movable portion (32) comprises a first locking piece (321) and a second locking piece (322) hinged in the latch body slot (312), respectively; the first locking piece (321) and the second locking piece (322) are configured to be distributed in the circumferential direction of the lock catch body (31); the movable part (32) further comprises a connecting locking piece (323) which is positioned between the first locking piece (321) and the second locking piece (322) and is respectively hinged with the first locking piece (321) and the second locking piece (322);

when the locking mechanism is positioned at the locking position, the hinge axis of the first locking piece (321) and the locking body (31), the hinge axis of the connecting locking piece (323) and the first locking piece (321), the hinge axis of the second locking piece (322) and the locking body (31) and the hinge axis of the connecting locking piece (323) and the second locking piece (322) are sequentially distributed in the circumferential direction of the locking body (31).

5. The connecting structure according to claim 4, characterized in that the inner wall of the first locking piece (321) is configured to press against the outer wall of the dumbbell bar (2) in the locked position.

6. The connecting structure according to claim 4, wherein a catch groove (3221) is provided on the latch body (31) at a position corresponding to the free end of the second lock piece (322).

7. The connection according to claim 5, characterized in that the flange (324) is provided at least on the inner wall of the first locking piece (321).

8. The connection according to claim 7, characterized in that the recess (21) is configured as an annular groove around the entire circumference of the dumbbell rod (2).

9. The connecting structure according to claim 8, wherein a plurality of grooves (21) are provided, and a plurality of the grooves (21) are spaced apart in the axial direction of the dumbbell bar (2).

10. The connection structure according to claim 8, characterized in that the barbell bar (1) is configured to be fixed inside a hollow cavity (311) of the latch body (31); the flange (324) is configured to correspond to the position of the recess (21) when the dumbbell rod (2) is mated with the hollow cavity (311) in place.

11. The connection structure according to claim 8, characterized in that the flange (324) is configured to correspond to the position of the groove (21) on the dumbbell bar (2) when the dumbbell bar (2) is threaded into the hollow cavity (311) to mate the dumbbell sheet (4) with the end face of the latch body (31).

12. The connection according to claim 1, characterized in that the outer wall of the dumbbell bar (2) is provided with an axial groove (22) extending in the axial direction of the dumbbell bar (2), which axial groove (22) is configured for guiding engagement with a protrusion (41) provided in a through hole of a dumbbell piece (4).

13. The connection according to claim 1, further comprising a quick release mechanism (5) for securing to the dumbbell bar (2), the quick release mechanism (5) being configured to limit axial displacement of the dumbbell sheet (4) on the dumbbell bar (2).

14. The connection according to claim 13, characterized in that the quick release mechanism (5) comprises a clamp body (51) having a non-closed ring shape, and a link mechanism (52) hinged at two end positions of the clamp body (51), the link mechanism (52) being configured to lock the clamp body (51) when rotated to the first position; and releasing the clamp body (51) when rotated to the second position.

15. A latch mechanism (3), characterized in that the latch mechanism (3) comprises a latch body (31) and a movable part (32) hinged on the latch body; the lock catch body (31) is provided with a hollow cavity (311) which is sleeved on the first rod piece and the second rod piece; the movable part (32) is configured to move between a locking position and an unlocking position relative to the lock catch body (31);

when the movable part is positioned at the locking position, a flange (324) arranged on the inner wall of the movable part (32) is configured to be clamped with a groove (21) arranged on the second rod piece and extending along the circumferential direction of the second rod piece;

when in the unlocked position, a flange (324) provided on the inner wall of the movable portion (32) is configured to disengage from the groove (21).

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