Dumbbell

Abstract

The dumbbell comprises a holding part, a connecting part and a supporting part, the holding part and the supporting part are connected through the connecting part, the supporting part is arranged corresponding to the outer side of the forearm of the human body, the holding part is used for being held by the hand of the human body, and the supporting part stops rotation of the back of the hand of the human body towards the outer side of the forearm. The gravity center of the dumbbell is connected with the supporting part through the connecting part, and when the wrist joint rotates reversely, supporting force is provided to share the weight of the dumbbell, so that injury caused by further excessive reverse rotation of the wrist joint is prevented, and meanwhile, the problem that the wrist is easy to turn over when the dumbbell is held in the conventional use process is solved, for example, the wrist is turned over. A user can adjust the device to a correct holding posture by himself, and the device has the advantages of being high in safety, stable in holding and good in comfort.

Description

Technical Field

[0001] The utility model relates to a sports device, in particular to a dumbbell. Background Art

[0002] Dumbbells are an auxiliary equipment for weightlifting and fitness exercises. Its main material is cast iron, and some are covered with a layer of rubber. The main use of dumbbells is for muscle strength training and muscle compound movement training. There are many different ways to exercise with dumbbells, which can exercise muscles in all parts of the body. For example, dumbbell biceps curls can exercise the biceps, seated dumbbell front raises can exercise the anterior deltoids, and seated bent-over lateral raises can exercise the posterior deltoids.

[0003] Dumbbells can be divided into two types: fixed weight dumbbells and adjustable weight dumbbells. Fixed weight dumbbells are usually made of cast iron, with an iron rod in the middle and solid balls at both ends. Adjustable dumbbells are similar to smaller barbells, with round iron plates of varying weights on both ends of the short iron rod, so that the weight can be increased or decreased as needed.

[0004] 1. The dumbbells in the prior art may cause the human wrist joint to rotate in the opposite direction during use. In particular, when the trainer is doing horizontal raises, flying birds and other similar movements, the weight of the dumbbells exerts a downward shear force on the human wrist joint, which may cause excessive pressure on the wrist, or insufficient control of the trainer's forearm and wrist joint strength.

[0005] 2. When doing lifting movements, such as standing press, supine chest press, etc., it is also difficult to consciously control the wrist to maintain a neutral position. This often causes the wrist joint to rotate in the opposite direction, leading to injuries. Therefore, the wrist pressure in the use of dumbbells in the prior art is too high, and the wrist is easily turned over, and it is impossible to ensure that the standard posture is maintained during the holding process. In the long run, this will increase the risk of wrist injury. Utility Model Content

[0006] In order to solve the above technical problems existing in the prior art, the utility model provides a dumbbell.

[0007] The utility model provides a dumbbell, and the specific technical solution is as follows:

[0008] A dumbbell comprises a gripping part, a connecting part and a supporting part, wherein the gripping part and the supporting part are connected via the connecting part, the supporting part is arranged corresponding to the outer side of a human forearm, the gripping part is used for grasping by a human hand, and the supporting part stops the rotation of the back of a human hand toward the outer side of the forearm.

[0009] Furthermore, the connecting portion is symmetrically arranged with the line connecting the midpoint of the gripping portion and the midpoint of the supporting portion as the axis, and the connecting portion includes a first end and a second end, and a connecting arm between the first end and the second end, the first end is connected to the gripping portion, and the second end is connected to the supporting portion.

[0010] Furthermore, the width of the first end of the connecting part is the first width, the width of the second end is the second width, the first width is greater than the second width, and the width of the connecting arm gradually shortens from the first width to the second width, so that the center of gravity is offset in the direction from the midpoint of the gripping part to the midpoint of the supporting part.

[0011] Furthermore, the connecting part is a columnar structure, so that the center of gravity of the dumbbell is close to the center of the overall structure.

[0012] Furthermore, the first end is configured as a hemispherical structure, the center of the sphere is close to two ends of the gripping portion, and the side away from the gripping portion is a hemispherical surface.

[0013] Furthermore, the length of the gripping portion is a first length, the length of the supporting portion is a second length, and the first length is greater than the second length, so that the second end of the connecting portion is close to a human forearm.

[0014] Furthermore, the connecting portion is configured to be arc-shaped, and the second end is connected to the supporting portion to form a U-shaped structure.

[0015] Furthermore, the position where the support portion contacts the outer side of a human forearm is a first area, and the first area is configured as an arc surface to increase its contact area with the outer side of a human forearm.

[0016] Furthermore, two ends of the first region extend along the direction from the support portion to the grip portion to the connecting portion to form a fitting surface, and the fitting surface is arranged corresponding to the outer side of a human forearm.

[0017] Furthermore, the dumbbell is an integrally molded structure.

[0018] The dumbbell of the utility model has the following advantages:

[0019] 1. Compared with the dumbbells in the prior art, the dumbbell provided by the utility model includes a gripping portion, a connecting portion and a supporting portion. The gripping portion is used for human grasping, and the supporting portion is arranged corresponding to the outer side of the human forearm. The two ends of the connecting portion are respectively connected to the gripping portion and the supporting portion. At the same time, the connecting portion provides the main weight of the dumbbell for exercise. A connection relationship is established between the center of gravity of the dumbbell and the outer side of the forearm through the connecting portion, that is, the dumbbell supporting portion contacts the human forearm, and the forearm plays a supporting role, which reduces the force on the wrist joint, thereby preventing injuries caused by further excessive reversal of the wrist joint.

[0020] 2. It solves the problem that the wrist may easily turn over when holding the dumbbells during normal use. If the wrist turns over, the user can adjust to the correct holding posture by himself. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of a dumbbell of the utility model.

[0022] Figure 2It is the use state of the dumbbell of the utility model Figure 1 .

[0023] Figure 3 It is the use state of the dumbbell of the utility model Figure 2 .

[0024] Figure 4 This is a schematic diagram of the first embodiment of the dumbbell of the utility model. Figure 1 .

[0025] Figure 5 It is a top view of the first embodiment of the dumbbell of the present utility model.

[0026] Figure 6 It is a bottom view of the first embodiment of the dumbbell of the present utility model.

[0027] Figure 7 This is a schematic diagram of the first embodiment of the dumbbell of the utility model. Figure 2 .

[0028] Figure 8 It is a schematic diagram of the second embodiment of the dumbbell of the present utility model. DETAILED DESCRIPTION

[0029] In order to better understand the purpose, structure and function of the present invention, the dumbbell of the present invention is described in detail below in conjunction with the accompanying drawings.

[0030] like Figure 1 The dumbbell provided by the utility model shown in the figure comprises a gripping portion 1, a connecting portion 2 and a supporting portion 3. The gripping portion 1 is used for human grasping, and the supporting portion 3 is arranged corresponding to the outer side of the human forearm. The two ends of the connecting portion 2 are respectively connected to the gripping portion 1 and the supporting portion 3. At the same time, the connecting portion 2 provides the main weight of the dumbbell for exercise. The connecting portion 2 establishes a connection relationship between the center of gravity of the dumbbell and the outer side of the forearm, that is, an interaction force is generated between the dumbbell and the outer side of the human forearm, and when the wrist joint rotates in the opposite direction, a supporting force is provided to share the weight of the dumbbell, thereby preventing injuries caused by further excessive reversal of the wrist joint;

[0031] like Figure 2 and Figure 3 As shown, when in use, the back of the human hand is opposite to the inner side of the support part 3 and passes through the support part 3. After grasping the grip part 1, the forearm is kept vertical to the ground. At this time, the inner side of the support part 3 is in vertical contact with the outer side of the human forearm. Then, by controlling the forearm to move back and forth in a direction perpendicular to the ground, the dumbbell is lifted and lowered for exercise.

[0032] Generally, when doing dumbbell press or similar movements, the standard action is to keep the line connecting the palm of the fist and the wrist joint as vertical as possible to the ground after grasping the dumbbell. The support part 3 of the dumbbell has been in contact with the outside of the forearm and intersected at the support point before the exercise starts, so that the three position points of the dumbbell center of gravity (close to the palm of the fist), the wrist joint and the support point form a relatively stable triangular support structure.

[0033] When the center of gravity of the dumbbell approaches the outside of the forearm with the human wrist joint as the center, the movement path of the grip 1 is a first arc with the human wrist joint as the center, that is, the center of gravity of the dumbbell is displaced along the first arc under the action of the vertical downward gravity G and the oblique upward supporting force F1 provided by the hand, wherein the supporting force F1 can be decomposed into a vertical upward component force F11 opposite to the direction of the gravity G and a horizontal component force F12 pointing from the outside of the forearm to the outside and parallel to the ground. Compared with the dumbbell structure in the prior art, when the weight G cannot be offset by the upward component force F11 of the hand alone, the dumbbell continues to move downward along the first arc, thereby causing injury due to excessive reverse twisting of the wrist joint.

[0034] Since the connecting portion 2 between the grip portion 1 and the supporting portion 3 of the dumbbell also provides an oblique upward supporting force F2, the supporting force F2 can also be decomposed into a vertical upward component force F21 opposite to the direction of gravity G and a horizontal component force F22 directed from the outside of the forearm to the outside and parallel to the ground. The component force F22 and the component force F21 are both vertical upward components. The two form an interaction force with the gravity G so that the center of gravity of the dumbbell no longer moves along the first arc direction, thereby reducing the supporting force F1, that is, reducing the pressure of the dumbbell's center of gravity offset on the wrist joint, preventing the wrist joint from further reverse rotation, and ensuring the safety of the human wrist joint during exercise.

[0035] In order to further understand the purpose, structure and function of the utility model, the dumbbell of the utility model is further described in detail below in conjunction with the embodiments.

[0036] like Figure 4 In the first embodiment of the utility model shown, the dumbbell includes a gripping portion 1, a connecting portion 2 and a supporting portion 3. The gripping portion 1 is used for grasping by a human hand, and the supporting portion 3 is arranged corresponding to the outer side of a human forearm. The gripping portion 1 and the supporting portion 3 are connected by two oppositely arranged connecting portions 2. The supporting portion 3 contacts the outer side of a human forearm to stop the back of a human hand from rotating toward the outer side of the forearm.

[0037] The connecting portion 2 is symmetrically arranged with the line connecting the midpoint of the gripping portion 1 and the midpoint of the supporting portion 3 as the axis, and the connecting portion 2 includes a first end 21 and a second end 22 on both sides, and a connecting arm 23 between the first end 21 and the second end 22, the first end 21 is connected to the gripping portion 1, and the second end 22 is connected to the supporting portion 3. As shown in the figure, the width of the first end 21 is the first width, and the width of the second end 22 is the second width, the first width is greater than the second width, and the width of the connecting arm 23 is gradually shortened from the wider first end 21 to the narrower second end 22, and the connecting arm 2 The side surface of the connecting portion 3 is a funnel-shaped structure. Compared with the prior art in which the center of gravity of the dumbbell is located at the midpoint of the gripping portion 1, the width setting of the connecting portion 2 lowers the overall center of gravity of the dumbbell and is located between the center point of the gripping portion 1 and the human wrist joint, thereby ensuring that the center of gravity of the dumbbell is located above the human wrist joint and reducing the distance between the center of gravity of the dumbbell and the human wrist joint, which is equivalent to shortening the torque between the fulcrum and the center of gravity of the dumbbell with the human wrist joint as the fulcrum, thereby reducing the upward force required to be provided by the hand wrist joint, thereby achieving the effect of relieving the pressure on the human wrist joint.

[0038] Furthermore, the first end 21 is configured as a hemispherical structure, with the center of the sphere close to the two ends of the grip portion 1, and the side away from the grip portion 1 is a hemispherical surface. The spherical surface structure increases the area in contact with the human body, avoiding bumps or squeezing injuries caused by accidental collisions with the human body during use.

[0039] Preferably, the length of the gripping portion 1 is a first length, and the length of the supporting portion 3 is a second length, and the first length is greater than the second length. Since the width of a human palm is generally greater than the width of a forearm near the wrist joint, by reducing the second length, the two connection points between the second end 22 of the connecting portion 2 and the supporting portion 3 are close to the outer sides of the ulna and radius of the human forearm, so that the second end 22 of the connecting portion 2 contacts the left and right sides of the forearm, thereby assisting the supporting portion 3 in providing support and alleviating the pressure on the outer side of the human forearm.

[0040] Further, such as Figure 5 As shown, the connecting portion 2 is arranged in an arc shape and connected with the supporting portion 3 to form a U-shaped structure, so that the pressure applied by the dumbbell to the outer side of the forearm is transmitted in the tangent direction of the arc, thereby reducing the stress concentration generated when the supporting portion 3 contacts the forearm.

[0041] Preferably, Figure 6 and Figure 7 As shown, the position below the support part 3 that contacts the outer side of the human forearm is the first area 31. When the dumbbell grip 1 is held, the first area 31 fits against the outer side of the human forearm. By setting the first area 31 as an arc surface, the contact area between the support part 3 and the outer side of the human forearm is increased and the ergonomic design improves the fit between the two.

[0042] Specifically, when the center of gravity of the dumbbell moves away from the outside of the forearm, a downward oblique pressure F3 is generated on the first area 31 through the connecting part 2, and the pressure F3 can be decomposed into a vertically downward component F31 and a horizontal component F32 pointing to the outside of the forearm. According to the pressure calculation formula P=F / S, where P represents pressure, F represents vertical force (pressure), and S represents the force area, when the pressure F remains unchanged, the pressure P decreases with the increase of the force area S, that is, the contact area between the first area 31 and the outside of the human forearm increases, and the pressure on the outside of the human forearm caused by the weight of the dumbbell decreases, thereby reducing the pressure on the outside of the human forearm, avoiding scratches on the skin or injuries to the forearm, and improving the safety and comfort of exercise.

[0043] Furthermore, both ends of the first area 31 extend along the direction of the support portion 3 pointing to the grip portion 1 to the connecting portion 2 to form a fitting surface, and the fitting surface is arranged corresponding to the outer side of the human forearm, that is, both ends of the arcuate first area 31 of the support portion 3 extend toward the connecting portions 2 on both sides, and extend to the connecting arm 23 through the second end 22, forming a crescent-shaped fitting surface with the first area 31. By making the fitting surface contact with the outer side of the human forearm, the contact area between the dumbbell and the outer side of the human forearm is increased, and the fit between the support portion 3 and the connecting portion 2 connected thereto and the outer side of the human forearm is increased, thereby sharing the pressure acting on the first area 31. At the same time, the fitting surface is closer to the outer sides of the ulna and radius of the human forearm, which can also improve the stability of the forearm in the horizontal direction during exercise.

[0044] Furthermore, the dumbbell can be set with multiple weight parameters, such as 2kg, 4kg, 6kg, 8kg or 10kg, etc. The distance between the center point of the grip portion 1 and the center point of the support portion 3 is the first distance, which is set in a positive correlation with the weight of the dumbbell. As the weight of the dumbbell increases, the pressure transmitted to the outside of the forearm increases when the human wrist joint is reversed, and the first distance increases accordingly, that is, the angle between the connecting portion 2 and the forearm is reduced, so that the component of the pressure acting vertically on the forearm is reduced, thereby improving the comfort of the forearm and reducing the risk of injury. Preferably, the first distance is set to 126mm to 153mm.

[0045] Preferably, the length of the grip portion 1 is set to 90 mm to 110 mm, and the diameter of the grip portion 1 is set to 27 mm to 27.5 mm, so as to conform to the palm width of the general public and be easy to grasp.

[0046] Preferably, the above structure adopts an integrated molding structure to improve the continuity of dumbbell weight transfer and enhance the fit between the human hand and arm and the dumbbell, thereby improving safety and comfort.

[0047] like Figure 8In the second embodiment of the utility model shown, the dumbbell includes a gripping portion 1, a connecting portion 2 and a supporting portion 3. The gripping portion 1 is used for grasping by a human hand, the supporting portion 3 is arranged corresponding to the outer side of a human forearm, and the gripping portion 1 and the supporting portion 3 are connected by two connecting portions 2 arranged opposite to each other.

[0048] The structure of the second embodiment is similar to that of the first embodiment, but the difference is that the connecting portion 2 in the second embodiment is an overall square columnar structure, and the first end 21 and the second end 22 have the same width, that is, the overall center of gravity of the dumbbell is closer to the center of the overall structure, and then when the human body pushes the dumbbell, the center of gravity of the dumbbell is lowered and closer to the top of the human wrist joint, thereby further reducing the distance between the center of gravity of the dumbbell and the wrist joint, that is, reducing the torque between the fulcrum and the center of gravity of the dumbbell with the human wrist joint as the fulcrum, so that the upward force required to be provided by the wrist joint of the hand is reduced, thereby achieving the effect of alleviating the pressure on the human wrist joint.

[0049] Of course, in some other embodiments, the connecting portion 2 can also be set to other cylindrical structures with circular, triangular or polygonal cross-sections. That is, as long as the center of gravity of the dumbbell can be offset in the direction from the midpoint of the grip portion 1 to the midpoint of the support portion 3 and does not exceed the midpoint of the first distance, the effect of reducing the pressure on the human wrist joint can be achieved.

[0050] In addition, in the above two embodiments, two connecting parts 2 are symmetrically arranged. In some other embodiments, it can also be adjusted to one or more connecting parts 2, that is, as long as the two ends of the connecting part 2 are respectively connected to the gripping part 1 and the supporting part 3, when the human body grasps the gripping part 1, the three positions of the dumbbell center of gravity, the human wrist joint and the supporting part 3 (the contact position with the outer side of the human forearm) can form a relatively stable structural state, thereby achieving the effect of preventing the human wrist joint from rotating in the opposite direction and being injured.

[0051] The utility model is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be understood as limiting the essence and scope of the utility model. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the utility model. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the various possible combinations of the embodiments of the utility model will not be described separately.

[0052] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

Claims

1. A dumbbell, characterized in that: It includes a gripping part, a connecting part and a supporting part, wherein the gripping part and the supporting part are connected via the connecting part, the supporting part is arranged corresponding to the outer side of a human forearm, the gripping part is used for grasping by a human hand, and the supporting part stops the rotation of the back of a human hand toward the outer side of the forearm.

2. A dumbbell according to claim 1, characterized in that: The connecting portion is symmetrically arranged with the line connecting the midpoint of the gripping portion and the midpoint of the supporting portion as the axis, and includes a first end and a second end, and a connecting arm between the first end and the second end, the first end is connected to the gripping portion, and the second end is connected to the supporting portion.

3. A dumbbell according to claim 2, characterized in that: The width of the first end of the connecting part is the first width, and the width of the second end is the second width. The first width is greater than the second width. The width of the connecting arm gradually shortens from the first width to the second width, so that the center of gravity is offset in the direction from the midpoint of the gripping part to the midpoint of the supporting part.

4. A dumbbell according to claim 2, characterized in that: The connecting part is a columnar structure, so that the center of gravity of the dumbbell is close to the center position of the overall structure.

5. A dumbbell according to claim 3, characterized in that: The first end is configured as a hemispherical structure, the center of the sphere is close to two ends of the gripping portion, and the side away from the gripping portion is a hemispherical surface.

6. A dumbbell according to any one of claims 2 to 4, characterized in that: The length of the gripping portion is a first length, the length of the supporting portion is a second length, the first length is greater than the second length, and the second end of the connecting portion is close to the forearm of a human body.

7. A dumbbell according to claim 2, characterized in that: The connecting portion is configured to be arc-shaped, and the second end is connected to the supporting portion to form a U-shaped structure.

8. A dumbbell according to claim 1, characterized in that: The position where the support part contacts the outer side of the human forearm is the first area, and the first area is set as an arc surface to increase its contact area with the outer side of the human forearm.

9. A dumbbell according to claim 8, characterized in that: Two ends of the first region extend to the connecting portion along the direction from the supporting portion to the holding portion to form a fitting surface, and the fitting surface is arranged corresponding to the outer side of the human forearm.

10. The dumbbell according to any one of claims 1 to 5, characterized in that The dumbbells are a one-piece structure.

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