EP3865187A1 - Weight training device - Google Patents

A weight training device, comprising a holding element, a first counterweight element, and a first fastening element. The holding element has a locking member on one end, and one side of the holding element is provided with at least one first upper positioning member. The first counterweight element has a first locking member and a first position limiting slot on one end, wherein the first locking member is for locking the locking member of the holding element. One end of the first fastening element is position limited in the first position limiting slot in an elastic manner, and another end of the first fastening element has a first stopper for fixing the first upper positioning member to prevent a relative rotation between the holding element and the first counterweight element, so that a stable connection can be formed between the holding element and the first counterweight element for easy use, and the safety use can be ensured.

Field of the invention

• The present invention relates to a weight training device like a dumbbell, kettlebell, or barbell, and more particular to a weight training device that can stably combine two interlocking articles for easy use and the safety use can be ensured.

Background of the invention

• For a common fitness device on the market, such as a bike exercise equipment, arm training device, etc., the purchasing cost is high and the size is huge, and therefore these devices are not suitable for use in an ordinary family. While for a weight training device, such as a dumbbell, kettlebell, or barbell, the size is small, the storage is easy, the purchasing cost is not high, the usage is not space restricted, and multiple body parts can do weight training, so that the body training can be done anytime. Therefore, the weight training device has become one of the commonly used fitness devices for ordinary people.

• Except by iron casting, a general weight training device can also be made in one piece by cement hardening in a blow-molded plastic mold of a specific shape. Whereas, the overall volume and weight are fixed and cannot be replaced according to the personal need. As a result, not only the device cannot be custom-made for achieving adequate effect of sport and exercise, but also it is required to purchase separate device to fit the need at different time, which increases the purchase cost. Currently, there is a weight training device having a structure of at least one counterweight element stacked in series by locking. The number of the counterweight elements can be increased or decreased according to the personal need, and therefore adequate effect of sport and exercise can be achieved and the purchase cost can be saved.

Summary of the invention

• However, in a practical use, the weight training device comprising plural counterweight elements stacked in series by locking has the problem that the locking structure may be loosened. It is not only inconvenient, but also it has the concern of safety use. In view of this, in order to provide a structure different from prior art and to improve the above disadvantages, the inventor has continuously researched to develop the present invention.

• An object of the present invention is to provide a weight training device to solve the problems that the stacked counterweight elements of a conventional weight training device become loose easily during use by providing a fastening element respectively between the interlocking holding element and the first counterweight element and the interlocking first counterweight element and the second counterweight element, so that stable connection can be formed between the neighboring holding element and the first counterweight element and between the neighboring first counterweight element and the second counterweight element for easy use, and the safety use can be ensured.

• In order to achieve the above object, the present invention provides a weight training device, comprising a holding element, a first counterweight element, and a first fastening element. The holding element has a locking member on one end, and one side of the holding element is provided with at least one first upper positioning member. The first counterweight element has a first locking member and a first position limiting slot on one end, wherein the first locking member is for locking the locking member of the holding element. One end of the first fastening element is position limited in the first position limiting slot in an elastic manner, and another end of the first fastening element has a first stopper for fixing the first upper positioning member to prevent a relative rotation between the holding element and the first counterweight element.

• In implementation, a first lower positioning member is provided on one side of the first counterweight element, the first lower positioning member and the first position limiting slot are connected to each other, and the first lower positioning member vertically corresponds to the first upper positioning member for positioning the two sides of the first stopper, respectively.

• In implementation, the first stopper is a ring.

• In implementation, plural first upper positioning members are provided to the holding element, and the plural first upper positioning members are arranged spaced on one side of the holding element.

• In implementation, the first position limiting slot comprises a first slot and a first tunnel, and a first block portion is provided between the first slot and the first tunnel, so that one end of the of the first fastening element is position limited by the first slot and the first stopper on another end of the first fastening element is position limited in the first tunnel.

• In implementation, the weight training device of the present invention further comprises a first cover covering the first slot for limiting the position of one end of the first fastening element.

• In implementation, the first fastening element comprises a stick and a spring; one end of the stick is provided with a head, and another end of the stick connects the first stopper; the spring is put on the stick, and two ends of the spring respectively press against the head and the first block portion, so that one end of the first fastening element is position limited in the first position limiting slot in an elastic manner.

• In implementation, another end of the first counterweight element is provided with a first locking member, and one side of the first counterweight element is provided with at least one second upper positioning member.

• In implementation, the weight training device of the present invention further comprises a second counterweight element and a second fastening element. The second counterweight element has a second locking member and a second position limiting slot on one end, wherein the second locking member is for locking the first locking member of the first counterweight element. One end of the second fastening element is position limited in the second position limiting slot in an elastic manner, and another end of the second fastening element has a second stopper for fixing the second upper positioning member to prevent a relative rotation between the first counterweight element and the second counterweight element.

• In implementation, a second lower positioning member is provided on one side of the second counterweight element, the second lower positioning member and the second position limiting slot are connected to each other, and the second lower positioning member vertically corresponds to the second upper positioning member for positioning the two sides of the second stopper, respectively.

• The present invention will be understood more fully by reference to the drawings and detailed descriptions of the preferred embodiments below.

Brief description of drawings
• FIG. 1 is an exploded view of the preferred embodiment of the present invention.
• FIG. 2 is a perspective view of a preferred embodiment of the present invention.
• FIG. 3 is a cross-sectional view of the assembly of a preferred embodiment of the present invention.
• FIG. 4 is a cross-sectional view of the assembly of an in-use preferred embodiment of the present invention.
• FIG. 5 is a perspective view of an in-use preferred embodiment of the present invention.
Detailed Descriptions of Preferred Embodiments

• The present invention is a weight training device, like a dumbbell, kettlebell, or barbell, mainly comprising a holding element, a first counterweight element, and a first fastening element. The holding element has a locking member on one end, and one side of the holding element is provided with at least one first upper positioning member. The first counterweight element has a first locking member and a first position limiting slot on one end, wherein the first locking member is for locking the locking member of the holding element. One end of the first fastening element is position limited in the first position limiting slot in an elastic manner, and another end of the first fastening element has a first stopper for fixing the first upper positioning member to prevent a relative rotation between the holding element and the first counterweight element.

• Please refer to

  FIGS. 1-5

  , which show preferred embodiments of the

  weight training device

  1 of the present invention. The present embodiment takes the kettlebell as an example, which sequentially comprises, in series, a

  holding element

  2, a

  first counterweight element

  3, a

  second counterweight element

  5, a

  first fastening element

  4 respectively fastening the

  holding element

  2 and the

  first counterweight element

  3, and a

  second fastening element

  6 respectively fastening the

  first counterweight element

  3 and the

  second counterweight element

  5. The upper part of the

  holding element

  2 is provided with a

  handle grip

  21 for a user to hold. The lower part of the

  holding element

  2 is provided with an

  arched convex bump

  22 for connecting with the two ends of the

  handle grip

  21. A depressed inner screw hole is located at the central position of the bottom surface of the

  arched convex bump

  22, and the inner screw hole is as the

  locking member

  23. One side of the periphery of the

  holding element

  2 is provided with three spacedly arranged grooves as the first

  upper positioning members

  24.

• The

  first counterweight element

  3 is a disc, which has a

  top surface

  31 and a

  bottom surface

  32 opposite to the

  top surface

  31. An upwards-protruding screw rod is provided at the central position of the

  top surface

  31 of the

  first counterweight element

  3, and the screw rod is as the

  first locking member

  33 for locking the

  locking member

  23 thereabove on the bottom of the

  holding element

  2. A depressed inner screw hole is located at the central position of the

  bottom surface

  32 of the first counterweight element, and the inner screw hole is as the

  first locking member

  331. Moreover, the

  top surface

  31 of the

  first counterweight element

  3 is provided with a downwards recessed first

  position limiting slot

  34. The first

  position limiting slot

  34 comprises an orthogonally connected

  first slot

  341 and a

  first tunnel

  342. Two bumps horizontally extending toward each other to form a spacer are provided between the

  first slot

  341 and the

  first tunnel

  342. The two bumps together are provided as a

  first block portion

  343. One side of the first counterweight element has a recess, and the recess is as a first

  lower positioning member

  35. Three spacedly arranged grooves are located below the first

  lower positioning member

  35, and the grooves are as the second

  upper positioning members

  351. The first

  lower positioning member

  35 and the

  first tunnel

  342 of the first

  position limiting slot

  34 are vertically connected, and the first

  lower positioning member

  35 corresponds to one of the first

  upper positioning members

  24 thereabove on one side of the periphery of the

  holding element

  2 the. A

  first cover

  36 is a long plate. The

  first cover

  36 locks and connects the

  top surface

  31 of the

  first counterweight element

  3, so that the top face of the

  first cover

  36 and the

  top surface

  31 are on the same plane, and the bottom face of the

  first cover

  36 covers the

  first slot

  34 to form a rectangular receiving space.

• The

  first fastening element

  4 comprises a

  first stopper

  41, a

  stick

  42, a

  head

  43, and a

  spring

  44. The

  first stopper

  41 is a ring. One end of the

  stick

  42 is connected to the

  head

  43, and another end of the

  stick

  42 is connected to the

  first stopper

  41. The

  spring

  44 is put on the

  stick

  42. Two ends of the

  spring

  44 respectively press against the

  head

  43 and one side of the

  first block portion

  343, so that one end of the

  first fastening element

  4 is position limited in the

  first slot

  341 of the first

  position limiting slot

  34 in an elastic manner, and the

  first stopper

  41 is position limited in the

  first tunnel

  342. Thereby, as shown in

  FIGS. 4

  and

  5

  , when pulling the

  first stopper

  41 by finger to draw out the

  first fastening element

  4, the

  first fastening element

  4 can be oriented by 90°, and after the

  first fastening element

  4 bounces back, two sides of the

  first stopper

  41 respectively fix the first

  upper positioning members

  24 of the holding

  element

  2 and the first

  lower positioning member

  35 of the

  first counterweight element

  3 to prevent the relative rotation of the holding

  element

  2 and the

  first counterweight element

  3.

• In implementation, the main structure of the

  second counterweight element

  5 and the

  first counterweight element

  3 are the same, and the main structure of the

  second fastening element

  6 and the

  first fastening element

  4 are the same. The

  second counterweight element

  5 has a

  second locking member

  51 and a second

  position limiting slot

  52 on the

  top surface

  31. The

  second locking member

  51 locks the

  first locking member

  331 of the

  first counterweight element

  3 thereabove. A second

  lower positioning member

  53 is provided on one side of the periphery of the

  second counterweight element

  5. The second

  lower positioning member

  53 and the second

  position limiting slot

  52 are vertically connected to each other, and the second

  lower positioning member

  53 vertically corresponds to one of the second

  upper positioning member

  351 on one side of the periphery of the

  first counterweight element

  3. One end of the

  second fastening element

  6 may be position limited in the second

  position limiting slot

  52 in an elastic manner, and another end of the

  second fastening element

  6 has a

  second stopper

  61 for fixing the second

  upper positioning member

  351 and the second

  lower positioning member

  53 by two sides of the

  second stopper

  61 after being drawn out, rotating, and returning to the original position to prevent a relative rotation between the

  first counterweight element

  3 and the

  second counterweight element

  5.

• Therefore, the present invention has the following advantages:

1. 1. The present invention connects the holding element, the first counterweight element, and the second counterweight element in series by locking. The interlocking holding element and the first counterweight element first fastening element are respectively positioned by the first fastening element provided therebetween, and the interlocking first counterweight element and the second counterweight element are respectively positioned by the second fastening element provided therebetween. Therefore, the holding element, the first counterweight element, and the second counterweight element do not become loose after assembling, which is not only convenient to manipulate, but also can ensure the safety of use.
2. 2. The holding element of the present invention has plural first upper positioning members arranged spaced on one side of the periphery of the holding element, and the first counterweight element has plural second upper positioning members arranged spaced on one side of the periphery of first counterweight element. Therefore, as stacking and locking the holding element, the first counterweight element, and the second counterweight element with each other in series, one of the first upper positioning members or one of second upper positioning members can be chosen for positioning according to the actual locking condition to make the connection more suitable and stable.

• Accordingly, according to the content disclosed above, the present invention can indeed meet its anticipated object of providing a weight training device, which can respectively connect and lock the holding element and every counterweight element stably without being loose, and therefore, it is convenient to manipulate and the safety of use can be ensured.

1. A weight training device, comprising:

   a holding element, having a locking member on one end, and one side of the holding element provided with at least one first upper positioning member;

   a first counterweight element, having a first locking member and a first position limiting slot on one end, wherein the first locking member is for locking the locking member of the holding element; and

   a first fastening element, one end thereof position limited in the first position limiting slot in an elastic manner, and another end thereof having a first stopper for fixing the first upper positioning member to prevent a relative rotation between the holding element and the first counterweight element.

2. The weight training device according to claim 1, wherein a first lower positioning member is provided on one side of the first counterweight element, the first lower positioning member and the first position limiting slot are connected to each other, and the first lower positioning member vertically corresponds to the first upper positioning member for positioning the two sides of the first stopper, respectively.

3. The weight training device according to claim 2, wherein the first stopper is a ring.

4. The weight training device according to claim 1, 2, or 3, wherein plural first upper positioning members are provided to the holding element, and the plural first upper positioning members are arranged spaced on one side of the holding element.

5. The weight training device according to claim 1, wherein the first position limiting slot comprises a first slot and a first tunnel, and a first block portion is provided between the first slot and the first tunnel, so that one end of the of the first fastening element is position limited by the first slot and the first stopper on another end of the first fastening element is position limited in the first tunnel.

6. The weight training device according to claim 5, further comprising a first cover covering the first slot for limiting the position of one end of the first fastening element.

7. The weight training device according to claim 5, wherein the first fastening element comprises a stick and a spring; one end of the stick is provided with a head, and another end of the stick connects the first stopper; the spring is put on the stick, and two ends of the spring respectively press against the head and the first block portion, so that one end of the first fastening element is position limited in the first position limiting slot in an elastic manner.

8. The weight training device according to claim 1, wherein another end of the first counterweight element is provided with a first locking member, and one side of the first counterweight element is provided with at least one second upper positioning member.

9. The weight training device according to claim 8, further comprising a second counterweight element and a second fastening element, the second counterweight element having a second locking member and a second position limiting slot on one end, wherein the second locking member is for locking the first locking member of the first counterweight element, and one end of the second fastening element is position limited in the second position limiting slot in an elastic manner, and another end of the second fastening element has a second stopper for fixing the second upper positioning member to prevent a relative rotation between the first counterweight element and the second counterweight element.

10. The weight training device according to claim 9, wherein a second lower positioning member is provided on one side of the second counterweight element, the second lower positioning member and the second position limiting slot are connected to each other, and the second lower positioning member vertically corresponds to the second upper positioning member for positioning the two sides of the second stopper, respectively.