CN216319739U

CN216319739U - Adjustable dumbbell

Info

Publication number: CN216319739U
Application number: CN202122843109.XU
Authority: CN
Inventors: 吴世权; 黄京爱
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-04-19
Anticipated expiration: 2031-11-19
Also published as: US20230173328A1

Abstract

The utility model relates to an adjustable dumbbell, which comprises a dumbbell main body and dumbbell pieces accumulatively attached at two ends of the dumbbell main body, the dumbbell main body comprises a holding rod, mounting parts which are arranged at two ends of the holding rod and used for connecting dumbbell sheets, and a first telescopic rod and a second telescopic rod which are used for hanging the dumbbell sheets, the first telescopic rod and the second telescopic rod penetrate and extend in the holding rod, the two ends of the holding rod are respectively and fixedly connected with a spiral transmission piece, the first telescopic rod and the second telescopic rod are respectively connected with the spiral transmission pieces at the two ends of the holding rod through spiral pairs with opposite rotation directions, the spiral transmission piece is fixedly connected with the two ends of the holding rod through the independent spiral transmission piece to be connected with the first telescopic rod and the second telescopic rod through the spiral pairs, therefore, threads do not need to be formed in the inner cavity of the holding rod, the process difficulty is reduced, and the production efficiency is improved.

Description

Adjustable dumbbell

Technical Field

The utility model relates to the field of fitness equipment, in particular to a dumbbell capable of adjusting the number of dumbbell pieces, and particularly relates to an improvement on a telescopic structure of a telescopic rod.

Background

The dumbbell is a commonly used body-building apparatus, and an existing adjustable dumbbell, such as that proposed in patent publication No. CN111450475, is provided with two telescopic shafts which are arranged in a handle of the dumbbell in a penetrating manner, and the number of dumbbell pieces hung on the telescopic shafts is controlled by extending or retracting the telescopic shafts in different directions from two ends of the handle of the dumbbell, so that the weight of the dumbbell is adjusted. In the structure, a plurality of circles of internal threads are formed inside the dumbbell handle (or called a holding rod) to be matched with the thread groove on the telescopic shaft to realize the telescopic shaft, but the process difficulty is higher, the manufacturing process is more time-consuming, the yield is low, and the production efficiency of products is limited because the plurality of circles of internal threads are formed in the inner cavity of the dumbbell handle.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to solve the above problems, the present invention provides an adjustable dumbbell with an optimized telescopic structure.

The utility model is realized by adopting the following technical scheme:

the utility model provides an adjustable dumbbell, which comprises a dumbbell main body and dumbbell pieces which are accumulatively attached to two ends of the dumbbell main body, wherein the dumbbell main body comprises a holding rod and mounting parts which are arranged at two ends of the holding rod and used for connecting the dumbbell pieces, and further comprises a first telescopic rod and a second telescopic rod, the first telescopic rod and the second telescopic rod penetrate into the holding rod, the first telescopic rod and the second telescopic rod are driven by rotating the holding rod to extend out of or retract into the dumbbell main body in a back-to-back mode so as to hang the dumbbell pieces, the number of the dumbbell pieces at two ends of the dumbbell main body is adjusted, two ends of the holding rod are respectively and fixedly connected with a spiral transmission piece, the first telescopic rod and the second telescopic rod are respectively connected with the spiral transmission pieces at two ends of the holding rod through spiral pairs with opposite rotation directions, and therefore when the holding rod is positively rotated or reversely rotated, the first telescopic rod and the second telescopic rod are driven by the spiral transmission piece to extend out of or retract into the first telescopic rod and the second telescopic rod in a back-to-back mode The dumbbell main body.

Preferably, the spiral transmission member is of a circular ring structure, and the spiral transmission member is inserted and fixed in the holding rod from the outer side of the axial direction of the holding rod.

Wherein, preferably, be equipped with first location step in the holding rod, screw drive spare one end butt is in on the first location step, the holding rod periphery still is equipped with the jump ring groove, still fixed being equipped with on the screw drive spare along its axial extension's second location step, a jump ring joint is fixed jump ring groove is last and butt in second location step, thereby realize screw drive spare's axial positioning.

Preferably, the end of the holding rod is provided with a positioning groove extending along the axial direction of the holding rod, the spiral transmission member is fixedly provided with a third positioning step extending along the radial direction of the spiral transmission member, and the third positioning step is matched with the positioning groove to realize circumferential positioning of the spiral transmission member.

Preferably, the second positioning step and the third positioning step are integrally formed on the outer peripheral surface of the spiral transmission member to form a two-section step.

Preferably, the first telescopic rod and the second telescopic rod are provided with thread grooves, and the spiral transmission part is provided with internal threads matched with the thread grooves.

Preferably, the circumferential surfaces of the first telescopic rod and the second telescopic rod are provided with chutes which are formed along the axial direction of the first telescopic rod and the second telescopic rod, the installation part is provided with telescopic rod exposure holes for the first telescopic rod or the second telescopic rod to extend out, the telescopic rod exposure holes are fixedly provided with limit blocks matched with the appearance of the chutes, and the first telescopic rod and the second telescopic rod can extend and retract along the axial direction of the first telescopic rod and the second telescopic rod by matching the limit blocks in the chutes.

The utility model has the following beneficial effects: according to the utility model, the independent spiral transmission part is additionally arranged, and the spiral transmission part is fixedly connected to the two ends of the holding rod and is in spiral pair connection with the first telescopic rod and the second telescopic rod, so that threads are not required to be formed in the inner cavity of the holding rod, the process difficulty is reduced, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic perspective view of an adjustable dumbbell according to an embodiment;

FIG. 2 is a schematic perspective view of the dumbbell body in the example;

FIG. 3 is a cross-sectional view of the dumbbell body in the example embodiment;

FIG. 4 is an exploded view of the structure of the dumbbell body in the example;

FIG. 5 is an assembly view of the grip and the screw drive of the embodiment;

FIG. 6 is a schematic perspective view of a screw drive according to an embodiment;

FIG. 7 is a perspective view of the grip of the embodiment.

Detailed Description

To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The utility model will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 7, as a preferred embodiment of the present invention, an adjustable dumbbell is provided, which includes a dumbbell main body 10 having an "I" shape and a plurality of dumbbell pieces 20 installed at two ends of the dumbbell main body 10, wherein a first dumbbell piece 20 at two ends of the dumbbell main body 10 is fixedly connected to the dumbbell main body 10, and the remaining dumbbell pieces 20 are accumulatively installed on the first dumbbell piece 20 at two ends of the dumbbell main body 10, and the left and right end faces of each dumbbell piece are symmetrically provided with dovetail joints and dovetail grooves at 180 °, so that the accumulation of the dumbbell pieces is realized by the matching connection of the dovetail joints and the dovetail grooves on the adjacent dumbbell pieces.

Dumbbell main body 10 includes holding rod 1, fixed connection at the installation department 2 at 1 both ends of holding rod and wears to stretch at dumbbell main body 10 inside telescopic link 3, and wherein holding rod 1 is used for gripping the dumbbell to the accessible rotates the flexible of holding rod 1 realization telescopic link 3, and installation department 2 then is used for fixed dumbbell piece. The telescopic rod 3 specifically comprises a first telescopic rod 31 and a second telescopic rod 32, when the holding rod 1 is rotated, the first telescopic rod 31 and the second telescopic rod 32 synchronously extend or retract in different directions to hang the dumbbell pieces, and the adjustment of the number of the dumbbell pieces at two ends of the dumbbell main body 10 is realized.

The two ends of the holding rod 1 are respectively fixedly connected with a spiral transmission piece 4, the first telescopic rod 31 and the second telescopic rod 32 are respectively connected with the spiral transmission pieces 4 at the two ends of the holding rod 1 through spiral pairs in opposite directions, and when the holding rod 1 rotates forwards or backwards, the spiral transmission pieces 4 are matched with the first telescopic rod 31 and the second telescopic rod 32 to drive the first telescopic rod 31 and the second telescopic rod 32 to extend out or retract into the dumbbell main body 10 in a back-to-back mode.

This embodiment carries out the screw pair with screw drive spare 4 fixed connection at 1 both ends of holding rod and first telescopic link 31 and second telescopic link 32 and is connected through additionally setting up an independent screw drive spare 4 to needn't form out the screw in 1 inner chamber of holding rod, reduced the technology degree of difficulty, improved production efficiency.

The screw transmission member 4 at one end is exemplified below, the screw transmission member 4 is in a circular ring structure, and the screw transmission member 4 is inserted and fixed in the inner cavity of the holding rod 1 from the outer side of the holding rod 1 in the axial direction. Be equipped with first location step 11 in the

holding rod

1, 4 one end butt of screw drive spare is on first location step 11, and holding rod 1 periphery still is equipped with jump ring groove 13, still fixedly is equipped with along its axially extended second location step 42 on the screw drive spare 4, and 5 joint of a jump ring are fixed on jump ring groove 13 and are leaned on second location step 42 to realize screw drive spare 4's axial positioning. The end of the holding rod 1 is provided with a positioning groove 12 extending along the axial direction, the screw driving member 4 is fixedly provided with a third positioning step 41 extending along the radial direction, and the third positioning step 41 is matched in the positioning groove 12 to realize the circumferential positioning of the screw driving member 4.

In the embodiment, the spiral transmission element 4 is inserted and sleeved in the inner cavity of the holding rod 1 from the outer side of the axial direction of the holding rod 1, so that the space occupation of the spiral transmission element 4 in the axial direction of the holding rod 1 is reduced, and the appearance volume of the dumbbell is reduced. In other embodiments, the screw driver 4 may be coaxially fixed to the end of the grip 1.

The embodiment adopts the location mode of foretell location step, jump ring and constant head tank, and its advantage lies in that the assembling process is simpler, and efficiency is higher. In addition to the positioning structures shown in the present example, the screw drives 4 can also be provided in other embodiments with the usual axial and circumferential positioning structures, such as collars, end caps, key connections, etc. In addition, the screw driving member 4 and the grip 1 may be directly fixed by a fixing connection method such as screwing, bonding, etc.

In this embodiment, the second positioning step 42 and the third positioning step 41 are integrally formed on the outer peripheral surface of the spiral transmission member 4 to form a two-stage step, so that the manufacturability of casting and forming the spiral transmission member 4 is improved, and the production is facilitated.

In consideration of the ease of production and assembly, it is preferable that the first and second

telescopic rods

31 and 32 are provided with screw grooves, and the screw transmission member 4 is provided with an internal thread engaged with the screw grooves. Of course, in other embodiments, the screw drive 4 may be provided with a threaded groove and the first telescopic rod 31 and the second telescopic rod 32 may be provided with an external thread.

In addition, the circumferential surfaces of the first telescopic rod 31 and the second telescopic rod 32 are further provided with sliding grooves (such as the sliding grooves 321 of the second telescopic rod 32) which are formed along the axial direction of the first telescopic rod and the second telescopic rod, the mounting part 2 is provided with a telescopic rod exposing hole 21 for the first telescopic rod or the second telescopic rod to extend out, a limiting block 22 matched with the appearance of the sliding grooves is fixedly arranged in the telescopic rod exposing hole 21, and the limiting block 22 is matched in the sliding grooves, so that the first telescopic rod 31 and the second telescopic rod 32 can extend and retract along the axial direction of the first telescopic rod and the second telescopic rod in a linear motion mode.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. Dumbbell with adjustable, including dumbbell main body and the dumbbell piece of accumulatively attaching at dumbbell main body both ends, dumbbell main body includes the holding rod and sets up the installation department that is used for connecting the dumbbell piece at the holding rod both ends, still includes first telescopic link and second telescopic link, and first telescopic link and second telescopic link are worn and are stretched inside the holding rod, through rotating first telescopic link of holding rod drive and second telescopic link are liftoff mutually and are stretched out or retract the dumbbell main body is in order to hang the dumbbell piece to adjust the quantity of the dumbbell piece at dumbbell main body both ends, its characterized in that: the two ends of the holding rod are respectively and fixedly connected with a spiral transmission part, the first telescopic rod and the second telescopic rod are respectively connected with the spiral transmission parts at the two ends of the holding rod through spiral pairs with opposite rotation directions, so that when the holding rod is positively rotated or reversely rotated, the spiral transmission parts are matched with the first telescopic rod and the second telescopic rod to drive the first telescopic rod and the second telescopic rod to oppositely extend out of or retract into the dumbbell main body.

2. The adjustable dumbbell of claim 1, wherein: the spiral transmission part is of a circular ring-shaped structure, and the spiral transmission part is inserted and sleeved in the holding rod from the outer side of the axial direction of the holding rod.

3. The adjustable dumbbell of claim 2, wherein: be equipped with first location step in the holding rod, spiral drive spare one end butt is in on the first location step, the holding rod periphery still is equipped with the jump ring groove, still fixedly on the spiral drive spare be equipped with along its axially extended second location step, a jump ring joint is fixed jump ring groove is last and the butt in second location step realizes spiral drive spare's axial positioning.

4. The adjustable dumbbell of claim 2, wherein: the holding rod end is provided with a positioning groove extending along the axial direction of the holding rod, a third positioning step extending along the radial direction of the spiral transmission piece is fixedly arranged on the spiral transmission piece, and the third positioning step is matched in the positioning groove to realize circumferential positioning of the spiral transmission piece.

5. The adjustable dumbbell of claim 2, wherein: a first positioning step is arranged in the holding rod, one end of the spiral transmission part abuts against the first positioning step, a clamp spring groove is further formed in the periphery of the holding rod, a second positioning step extending along the axial direction of the spiral transmission part is further fixedly arranged on the spiral transmission part, and a clamp spring is clamped and fixed on the clamp spring groove and abuts against the second positioning step, so that the axial positioning of the spiral transmission part is realized; the end part of the holding rod is provided with a positioning groove extending along the axial direction of the holding rod, a third positioning step extending along the radial direction of the spiral transmission piece is fixedly arranged on the spiral transmission piece, and the third positioning step is matched in the positioning groove to realize the circumferential positioning of the spiral transmission piece; the second positioning step and the third positioning step are integrally formed on the outer peripheral surface of the spiral transmission piece to form a two-section step.

6. The adjustable dumbbell of claim 1, wherein: the first telescopic rod and the second telescopic rod are provided with thread grooves, and the spiral transmission part is provided with internal threads matched with the thread grooves.

7. The adjustable dumbbell of claim 1, wherein: the telescopic rod exposure hole is internally and fixedly provided with a limiting block matched with the appearance of the chute, and the limiting block is matched with the inside of the chute to ensure that the first telescopic rod and the second telescopic rod can stretch out and retract along the axial direction.