Dumbbell weight selection structure

• US 7,704,197 B2
• Filed: 11/08/2007
• Issued: 04/27/2010
• Est. Priority Date: 11/08/2007
• Status: Expired due to Fees

• Current Assignee: Yu-Chen Yu
• Original Assignee: Yu-Chen Yu
• Inventors: Yu, Yu-Chen
• Primary Examiner(s): Thanh; Loan H
• Assistant Examiner(s): GINSBERG, OREN ISAAC
• Application Number:
  US11/936,841
• Publication Number:
  US 20090124470A1
• Time in Patent Office: 901 Days
• Field of Search: 482 92- 94, 482/98, 482/104, 482106-109, 482/908, 482/99
• US Class Current: 482/108
• CPC Class Codes: A63B 21/00065 by increasing or reducing the number of resistance units
• CPC Class Codes: A63B 21/063 Weight selecting means
• CPC Class Codes: A63B 21/075 with variable weights , e.g. weight systems with weight selecting means for bar-bells or dumb-bells

Abstract

A dumbbell weight selection structure includes an extension rod disposed at any end of a handle unit. The extension rod is disposed with a selection unit, which contains a selection mechanism and multiple weight plates are disposed thereon. The selection mechanism includes a slide plate linked to drive the selection plate set to travel. A locking hole to insert by the selection plate set is disposed at where appropriately on each weight plate. The slide plate is moved to change connection of the selection plate set corresponding to the locking holes of multiple weight plates to select quantity of weight plates to be attached to the dumbbell as desired for achieving discretional adjustment of the overall weight of the dumbbell.

Claims

1. A dumbbell weight selection structure comprising a portable handle unit comprising an extension rod extending from two opposite ends thereof, a selection unit comprising a selection mechanism respectively fixed on the extension rods, and a plurality of weight plates, wherein the selection mechanism comprises a movable selection plate set;

and each weight plate comprises an opening and a locking opening, and wherein the opening and the locking opening comprise a common receiving opening to receive the extension rod and the selection mechanism, and when the selection plate set of the selection mechanism is moved and inserted into the locking opening, the weight plates are locked onto the selection mechanism and the handle unit, and when the selection plate set is released from the locking opening, the weight plates are released from the selection mechanism and the handle unit, wherein the selection plate set is comprised of multiple selection plates, wherein each selection plate of the selection plate set is pivotally attached to the selection plate set.

2. The dumbbell weight selection structure as claimed in claim 1, wherein the selection unit includes a casing;

a chute is disposed on the casing; and

the selection mechanism is disposed on the chute.

3. The dumbbell weight selection structure as claimed in claim 2, wherein a guide plate is further disposed on the selection mechanism;

two rails are respectively disposed on both sides of the guide plate;

a slip-on clip is externally disposed on the rails;

a slide plate is connected to the slip-on clip; and

the slip-on clip is further connected to a connection cord and the selection plate set.

4. The dumbbell weight selection structure as claimed in claim 1, wherein an axis is disposed among each selection plate.

5. The dumbbell weight selection structure as claimed in claim 3, wherein the slide plate, the slip-on clip, the connection cord, and the selection plate set are linked to each other.

6. The dumbbell weight selection structure as claimed in claim 3, wherein a locating slot is disposed on the slide plate;

and the locating slot is externally inserted onto a locating plate.

7. The dumbbell weight selection structure as claimed in claim 1, wherein the extension rod and the selection plate set form a loop.

8. The dumbbell weight selection structure as claimed in claim 3, wherein the slide plate is exposed out of the chute.

9. The dumbbell weight selection structure as claimed in claim 8, wherein multiple ribs are disposed on the chute.

10. The dumbbell weight selection structure as claimed in claim 3, wherein a gap is disposed on the guide plate, and the gap accommodates and secures the connection cord in position.

11. The dumbbell weight selection structure as claimed in claim 1, wherein a number of selection plates correspond to a number of the weight plates to be locked onto the selection set.

12. The dumbbell weight selection structure as claimed in claim 11, wherein a number of the selection plates can be adjusted.