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DE-112022000121-B4 - Adjustable dumbbell

DE112022000121B4DE 112022000121 B4DE112022000121 B4DE 112022000121B4DE-112022000121-B4

Abstract

An adjustable barbell, consisting of a barbell bar (100), a linear adjustment mechanism and a counterweight mechanism (200) at both ends of the barbell bar, characterized in that the barbell bar (100) has a sleeve (1) and two telescopic shafts (2) installed in the sleeve, wherein the two telescopic shafts (2) can slide against each other; wherein the counterweight mechanism (200) is located at both ends of the barbell bar (100) to provide the total weight of the adjustable barbell; wherein the linear adjustment mechanism has a limiting unit (3) and a gear adjusting unit (4); wherein the gear adjusting unit (4) serves to move the two telescopic shafts (2) closer together or further apart and thereby control the overall length of the two telescopic shafts (2); wherein the limiting unit (3) serves to limit the gear adjusting unit (4); wherein a connecting key (5) is installed between the telescopic shafts (2) to connect the two telescopic shafts (2); On one side of the two telescopic shafts (2) there is a linear cut (201), the two linear cuts (201) form an installation space for the connecting key (5), and on the outside of the telescopic shafts (2) are the external threads which extend along the axial direction; wherein the gear adjusting unit (4) has an inner gear plate (6) and a planetary gear structure; the planetary gear structure consists of two planet carriers (401), planet gear teeth (402) and inner rotating teeth (403), wherein the planet gear teeth (402) and the inner rotating teeth (403) are installed between the two planet carriers (401); wherein the inner rotating teeth (403) are arranged on the outside of the telescopic shaft (2) and installed in the center of the planet carrier (401), wherein the inner rotating teeth (403) are screwed to the telescopic shaft (2) to move the telescopic shaft (2) linearly; The planet gear teeth (402) are installed on the planet carrier (401), and the inside of the planet gear teeth (402) mesh with the inner rotating teeth (403) and the outer side meshes with the inner gear plate (6).

Inventors

  • Zhixiong Wang

Assignees

  • QINGDAO KINGDOM HEALTH INDUSTRY CO., LTD.

Dates

Publication Date
20260513
Application Date
20220105
Priority Date
20211209

Claims (6)

  1. An adjustable barbell, consisting of a barbell bar (100), a linear adjustment mechanism, and a counterweight mechanism (200) at both ends of the barbell bar, characterized in that the barbell bar (100) has a sleeve (1) and two telescopic shafts (2) installed in the sleeve, wherein the two telescopic shafts (2) can slide against each other; wherein the counterweight mechanism (200) is located at both ends of the barbell bar (100) to provide the total weight of the adjustable barbell; wherein the linear adjustment mechanism has a limiting unit (3) and a gear adjusting unit (4); wherein the gear adjusting unit (4) serves to move the two telescopic shafts (2) closer together or further apart and thereby control the total length of the two telescopic shafts (2); wherein the limiting unit (3) serves to limit the gear adjusting unit (4); wherein a connecting key (5) is installed between the telescopic shafts (2) to connect the two telescopic shafts (2); on one side of the two telescopic shafts (2) there is a linear cut (201), the two linear cuts (201) form an installation space for the connecting key (5), and on the outside of the telescopic shafts (2) are the external threads extending along the axial direction; wherein the gear adjusting unit (4) has an inner gear plate (6) and a planetary gear structure; the planetary gear structure consists of two planet carriers (401), planet gear teeth (402) and inner rotating teeth (403), wherein the planet gear teeth (402) and the inner rotating teeth (403) are installed between the two planet carriers (401); wherein the inner rotating teeth (403) are arranged on the outside of the telescopic shaft (2) and installed in the center of the planet carrier (401), wherein the inner rotating teeth (403) are screwed to the telescopic shaft (2) to move the telescopic shaft (2) linearly; the planet gear teeth (402) are installed on the planet carrier (401), and the inside of the planet gear teeth (402) mesh with the inner rotating teeth (403) and the outer side meshes with the inner gear plate (6).
  2. The adjustable dumbbell after Claim 1 , characterized in that the heads of the two telescopic shafts (2) are encased with circular guide plates (8), and the guide plates (8) are provided with guide projections (801) which correspond to the linear cut (201).
  3. The adjustable dumbbell after Claim 1 , characterized in that a locking unit (7) is installed between the planet carrier (401) and the internal rotating teeth (403), the locking unit (7) comprising a locking card (701) and a card fastening sleeve (702), the card fastening sleeve (702) being arranged on the sleeve (1), and the card fastening sleeve (702) being connected to the head of the sleeve (1) by a thread; one side of the card fastening sleeve (702) has a notch, and the other side is sheathed with internal rotating teeth (403); one side of the locking card (701) is installed in the notch, and the other side passes through the sleeve (1) to clamp the connecting key (5).
  4. The adjustable dumbbell after Claim 1 , characterized in that the other side is enclosed with the inner rotating teeth (403), and the outside of the sleeve (1) is also enclosed with a drive cylinder (9), wherein the inner gear plate (6) is connected to the drive cylinder (9), wherein the center of the inner gear plate (6) is provided with a plurality of projections (601), and the two ends of the drive cylinder (9) have slots corresponding to the projections (601), wherein the rotation of the drive cylinder (9) causes the inner gear plate (6) to rotate.
  5. The adjustable dumbbell after Claim 1 , characterized in that the counterweight mechanism (200) consists of a plurality of counterweight discs (10), wherein the upper and lower sides of the counterweight discs (10) have a mounting notch, wherein the counterweight discs (10) are connected to each other by a buckle arrangement, and the buckle arrangement is detachably connected to the mounting notch.
  6. The adjustable dumbbell after Claim 1 , characterized in that a barbell seat (11) is still provided for attaching the adjustable barbell.

Description

TECHNICAL AREA The present application concerns the technical field of fitness equipment, in particular adjustable dumbbells. STATE OF THE ART Currently, dumbbells are divided into two types: One type consists of a barbell and weight plates that are a single, integral part, and their weight is not adjustable. As users' demands for strength increase, it becomes necessary to purchase multiple sets of dumbbells with different weights, which is expensive and takes up a lot of space. The other type consists of a barbell and weight plates that are detachably connected by screws. Depending on the user's needs, a corresponding number of weight plates are attached to each end of the barbell. However, adjusting the length of the barbell is quite complicated. The US 2019/0168059 A1 This concerns a weight device with a handle, as well as a first and second bar that are axially movable. The US 2012/0309597 A1 This concerns a weight-adjustable barbell consisting of a barbell handle assembly, a number of weight plates, and a weight plate base. The barbell unit comprises two wedge pin bodies, each of which is movable inwards or outwards. The CN 201 558 453 U This refers to a dumbbell with adjustable weight, in which adjustment mechanisms are operated at both ends of the dumbbell by a rotational movement of a central handle element in order to add or remove weights. The CN 213 884 889 U This refers to a dumbbell where the number of dumbbell sections can be adjusted, as well as a dumbbell set that includes a dumbbell and a dumbbell stand. The CN 212 282 678 U relates to a dumbbell handle having a handle body with an inner cavity in which a planetary gear and a gear shaft are arranged, wherein a rotary movement of the planetary gear causes a rotation of the gear shaft. The US 2021/0146186 A1 This concerns an adjustable barbell with a barbell bar and a housing located at one end, in which a manually sliding locking mechanism is provided that detachably connects weight elements to the barbell bar. Therefore, further research into the state of the art is required. Content of the utility model In view of the shortcomings of the prior art, the present application provides for an adjustable barbell that solves the problem of the cumbersome adjustment of the barbell counterweight described in the background above and can achieve a quick adjustment of the barbell bar. To achieve the aforementioned objectives, the present application proposes the following technical solutions: The adjustable barbell consists of a barbell bar, a linear adjustment mechanism and a counterweight mechanism at both ends of the barbell bar; the so-called barbell bar has a sleeve and two telescopic shafts installed in the sleeve, whereby the two telescopic shafts can slide against each other; The counterweight mechanism is located at both ends of the barbell to provide the total weight of the adjustable barbell; The linear adjustment mechanism has a limiting unit and a gear adjustment unit; wherein The gear adjusting unit is used to move the two telescopic shafts closer together or further apart, thereby controlling the overall length of the two telescopic shafts; the limiting unit is used to limit the gear adjusting unit. The so-called limiting unit has a U-shaped mounting block and a locking pin. One end of the locking pin is a locking pin mounting block that extends through the U-shaped mounting block to the other end. It serves to limit the gear adjusting unit after adjustment. A return spring is inserted between the locking pin mounting block and the U-shaped mounting block to reset the locking pin and thus limit the gear adjusting unit. A connecting key is installed between the so-called telescopic shafts to connect the two telescopic shafts; on one side of the two telescopic shafts there is always a linear cut, the two linear cuts form an installation space for the connecting key, and on the outside of the telescopic shaft are the external threads that extend along the axial direction. The heads of the two telescopic shafts are always encased with circular guide plates, and the guide plates are provided with guide projections that correspond to the linear cut. The so-called gear adjusting unit has an inner gear plate and a planetary gear structure; the so-called planetary gear structure consists of two planet carriers, planet gear teeth, and inner rotating teeth. The planet gear and inner rotating teeth are installed between the two planet carriers. The inner rotating gear sleeve is located on the outside of the telescopic shaft and installed in the center of the planet carrier. The inner rotating teeth are screwed to the telescopic shaft to move the telescopic shaft linearly. The planet gear teeth are installed on the planet carrier, and the inner surfaces of the planet gear teeth mesh with the inner gear teeth, while the outer side meshes with the inner gear plate. A locking unit is installed between the planet carrier and the internal rotating teeth