Dumbbell mounting bracket for barbells, and barbell shaft equipped with dumbbell mounting bracket
The dumbbell mounting bracket for barbells allows standard dumbbells to be attached to a barbell using a secure bolt and nut system, addressing financial waste and storage issues while enhancing training versatility.
Patent Information
- Application Number
- JP2021084077
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-05-18
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2041-05-18
AI Technical Summary
Conventional barbell systems require modifying dumbbells or barbells to connect them, leading to financial waste and storage issues when users first purchase dumbbells and later need a barbell, as the dumbbells cannot be easily attached to a standard barbell.
A dumbbell mounting bracket that integrates with a barbell shaft, allowing dumbbells to be securely attached using a bolt and nut system or a rotatable mechanism, accommodating various dumbbell shaft thicknesses and enabling connection of standard dumbbells to a barbell.
Enables the connection of standard dumbbells to a barbell without modification, reducing waste and storage needs, and expanding training options by allowing dumbbell exercises with a barbell.
Smart Images
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Abstract
Description
[Technical field]
[0001] The present invention relates to a dumbbell mounting bracket for a barbell, and a barbell shaft equipped with a dumbbell mounting bracket. [Background technology]
[0002] 2. Description of the Related Art Conventionally, there has been known a device that can be used as a barbell by attaching dumbbells to both ends of a shaft (for example, the techniques described in Patent Documents 1, 2 and 3).
[0003] In the above-mentioned prior art barbell, dumbbells are connected to both ends of a central shaft so that the central shaft and the dumbbell shafts are aligned coaxially. The connection method includes a method in which a male threaded shaft extending from at least one weight part of a dumbbell is screwed into a female threaded hole cut into both ends of the central shaft, or the reverse (e.g., Patent Documents 1 and 3), or a method in which a shaft extending from at least one weight part of a dumbbell is inserted into a female hole with a bolt attached to both ends of the central shaft and fixed with a bolt (e.g., Patent Document 2), and the like. [Prior art documents] [Patent documents]
[0004] [Patent Document 1] Utility Model Registration No. 3227363 [Patent Document 2] Japanese Utility Model Application Publication No. 55-67755 [Patent Document 3] Japanese Utility Model Application Publication No. 62-18162 Summary of the Invention [Problem to be solved by the invention]
[0005] In the above-mentioned conventional barbells, it was necessary to extend the shaft from at least one of the weight parts of the dumbbell, or to cut a female screw hole in the weight part. Therefore, it was necessary to provide the barbell shaft and the dumbbell as a set having a structure that allows them to be connected to each other.
[0006] Here, individual exercise enthusiasts generally first purchase easy-to-use dumbbells, and then proceed to purchase full-scale exercise equipment such as barbells. However, if you have already purchased ordinary dumbbells, and then try to purchase a barbell as in the above-mentioned prior art, the dumbbells you purchased earlier cannot be connected, so you end up having to purchase a dedicated dumbbell again, or a general barbell with large circular weights.
[0007] This not only results in financial waste, but also necessitates the need for space to put or store the increased number of dumbbells and round weights, which can be difficult to secure in an average household.
[0008] Therefore, an object of the present invention is to provide a dumbbell mounting bracket for a barbell that can be connected to general dumbbells, and a barbell shaft equipped with a dumbbell mounting bracket. [Means for solving the problem]
[0009] The dumbbell mounting hardware for a barbell according to one embodiment includes a barbell shaft mounting portion that is attached to an end of a barbell shaft, and a dumbbell shaft mounting portion that fixes a shaft of a dumbbell perpendicular to the barbell shaft. 、 an upper part in which an upper portion of the barbell shaft attachment portion and an upper portion of the dumbbell shaft attachment portion are integrally molded; a lower part in which a lower part of the barbell shaft attachment part and a lower part of the dumbbell shaft attachment part are integrally molded; Equipped with After the end of the barbell shaft and the dumbbell shaft are sandwiched between the upper part and the lower part, a bolt screw is passed through a screw through hole formed in each of the upper part and the lower part, and a nut is screwed into one end of the bolt screw and tightened to fix the barbell shaft and the dumbbell shaft. . In addition, the structure for attaching dumbbells to a barbell shaft according to one embodiment of the present invention is as follows: A structure for attaching dumbbells to a barbell shaft, A barbell shaft attachment portion attached to an end portion of the barbell shaft; A dumbbell shaft attachment portion for fixing a dumbbell shaft perpendicular to the barbell shaft; Equipped with a first dumbbell mounting member for a barbell in which a first portion of the dumbbell shaft mounting portion and the barbell shaft mounting portion are integrally formed; a second dumbbell mounting member for a barbell in which a second portion of the dumbbell shaft mounting portion and a barbell shaft clamping portion that clamps the end of the barbell shaft together with the barbell shaft mounting portion are integrally formed; Equipped with The second dumbbell mounting member for a barbell is connected to an end of the first dumbbell mounting member for a barbell so as to be rotatable relative to the first dumbbell mounting member for a barbell; By rotating the second dumbbell mounting member for a barbell relative to the first dumbbell mounting member for a barbell, the shaft of the dumbbell is clamped by the first and second parts of the dumbbell shaft mounting portion and the end of the barbell shaft is clamped between the barbell shaft mounting portion and the barbell shaft clamping portion, and then the second dumbbell mounting member for a barbell is fixed in contact with the barbell shaft and the first dumbbell mounting member for a barbell by a fixing member. Effect of the Invention
[0010] According to the present invention, it is possible to provide a dumbbell mounting bracket for a barbell to which general dumbbells can be connected, and a barbell shaft equipped with a dumbbell mounting bracket. [Brief description of the drawings]
[0011] [Figure 1] FIG. 1 is a perspective view of a first embodiment of a dumbbell mounting bracket for a barbell that can be used as a barbell by attaching dumbbells to both ends of a barbell shaft. [Diagram 2] 1A to 1C are a plan view, a right side view, a front view, and a rear view for explaining a dumbbell mounting bracket for a barbell in a first embodiment. [Diagram 3] 13A and 13B are diagrams showing variations of a barbell shaft equipped with dumbbell mounting brackets. [Figure 4] FIG. 11 is a perspective view of a second embodiment of a barbell shaft with dumbbell mounting brackets for a barbell that can be used as a barbell by attaching dumbbells to both ends. [Diagram 5] FIG. 6 is an explanatory diagram of components of the second embodiment. [Figure 6] 13 is an explanatory diagram of a connection mechanism of a barbell shaft. [Figure 7] 13A to 13C are explanatory diagrams of an example of operation of the mounting bracket for dumbbells for a barbell in the second embodiment. [Figure 8]FIG. 13 is a diagram showing a state in which a dumbbell mounting bracket for a barbell in a second embodiment is attached to a dumbbell. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0012] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. Fig. 1 is a perspective view of a first embodiment of a dumbbell mounting bracket for a barbell 100 that can be used as a barbell by attaching dumbbells 120 to both ends of a barbell shaft 110, and Fig. 2 is an explanatory plan view (Fig. 2(a)), right side view (Fig. 2(b)), front view (Fig. 2(c)), and back view (Fig. 2(d)) of the dumbbell mounting bracket for a barbell 100.
[0013] In the first embodiment, by attaching the dumbbell mounting bracket 100 for a barbell to both ends of a barbell shaft 110, a general dumbbell 120 in which two dumbbell weights 122a and 122b are connected by a dumbbell shaft 121 can be connected to the barbell shaft 110 and used as a barbell. The indication of "5KG" on the two dumbbell weights 122a and 122b indicates that each weight weighs 5 kilograms.
[0014] The barbell dumbbell mounting bracket 100 comprises a barbell shaft mounting portion 102 (a collective term for 102a and 102b) that is attached to the end of a barbell shaft 110. The barbell dumbbell mounting bracket 100 also comprises dumbbell shaft mounting portions 101 (a collective term for 101a and 101b) that sandwich and fix a dumbbell shaft 121 that is perpendicular to the barbell shaft 110 from above and below. This dumbbell shaft mounting portion 101 is molded integrally with the barbell shaft mounting portion 102.
[0015] Specifically, the barbell dumbbell mounting hardware 100 comprises an upper part 102a+101a in which an upper part 102a of the barbell shaft mounting portion 102 and an upper part 101a of the dumbbell shaft mounting portion 101 are integrally molded. The barbell dumbbell mounting hardware 100 also comprises a lower part 102b+101b in which a lower part 102b of the barbell shaft mounting portion 102 and a lower part 101b of the dumbbell shaft mounting portion 101 are integrally molded. When the barbell shaft 110 is mounted, the upper part 102a and the lower part 102b forming the barbell shaft mounting portion 102 form a cylindrical hollow part 203 in the barbell dumbbell mounting hardware 100. In addition, when the barbell shaft 110 is attached, the upper part 101a and the lower part 101b that form the dumbbell shaft attachment portion 101 have one end that is open to form the end of the cylindrical hollow portion 203, and the other end that is closed to form a dovetail joint.
[0016] In the first embodiment, when attaching dumbbell 120 to barbell shaft 110, the user sandwiches barbell shaft 110 and dumbbell shaft 121 between upper parts 102a+101a and lower parts 102b+101b. After that, the user passes bolt screw 104 with a hexagonal socket, for example, through screw through holes 103 formed in upper parts 102a+101a and lower parts 102b+101b. Then, the user screws nut 201 (see FIG. 2(b)) into one end of bolt screw 104, and then tightens it using, for example, a hexagonal wrench, thereby fixing barbell shaft 110 and dumbbell shaft 121. For this reason, the barbell shaft 110 has a screw through hole (not shown) for passing the bolt screw 104. This allows the barbell shaft 110 and the dumbbell shaft 121 to be attached to the dumbbell mounting bracket 100 for a barbell simultaneously and reliably.
[0017] 2(d), the thickness of the barbell shaft 110 inserted into the cylindrical hollow portion 203 formed by the upper portion 102a and the lower portion 102b that form the barbell shaft attachment portion 102 may be, for example, 28 millimeters (hereinafter, referred to as "mm") for a regular shaft. A thicker shaft, for example, a dumbbell attachment bracket 100 for barbells for 50 mm may be prepared.
[0018] 2(b), the thickness of the shaft 121 of the dumbbell 120 sandwiched within the cylindrical hollow portion 202 formed by the upper portion 101a and the lower portion 101b that form the dumbbell shaft attachment part 101 may also be, for example, 28 mm. Since the dumbbell shaft 121 is held by the dumbbell shaft attachment part 101 in a sandwiching manner, it can accommodate thickness variations of up to about 10 mm around 28 mm. Furthermore, taking into consideration the variation in thickness of typical dumbbell shafts 121, dumbbell attachment hardware 100 for barbells that can accommodate different thicknesses may be prepared.
[0019] The dumbbell mounting bracket 100 for a barbell in the first embodiment can be sold as a set of two, or can be sold as a set with the barbell shaft 110.
[0020] Figure 3 shows variations of a barbell shaft 110 equipped with the dumbbell mounting bracket 100 of the first embodiment described in Figures 1 and 2. Figure 3(a) shows a form in which a dumbbell shaft 121 is attached to a long barbell shaft 110 called an Olympic shaft via two dumbbell mounting brackets 100 for barbells into which sleeves 301 at both ends are inserted. FIG. 3(b) shows a form in which a dumbbell shaft 121 is attached to a barbell shaft 110 for general training, known as a standard shaft, via two dumbbell mounting brackets 100 for barbells into which sleeves 301 on both ends are inserted. FIG. 3(c) shows a form in which a dumbbell shaft 121 is attached to an easy-to-hold barbell shaft 110 called an EZ shaft via two dumbbell mounting fixtures 100 for barbells into which sleeves 301 on both ends are inserted. Furthermore, although not specifically shown, a handle-type barbell shaft 110 that is easy to hold, known as a triceps bar, may be used.
[0021] FIG. 4 is a perspective view of a second embodiment of a barbell shaft 410 (#1 and #2) with a dumbbell mounting bracket 400 (#1 and #2) for a barbell that can be used as a barbell by attaching dumbbells 420 (#1 and #2) to both ends. As shown in FIG. 4, two separate barbell shafts 410 (# 1 ) and 410 (# 2 ) can be connected to one another at a connection portion 412 . Dumbbells 420 (#1) and 420 (#2) can be attached to both ends of barbell shafts 410 (#1) and 410 (#2) via dumbbell mounting brackets 400 (#1) and 400 (#2) for barbells. This allows the user to attach their favorite dumbbells 420 (#1) and 420 (#2) to the barbell shafts 410 (#1) and 410 (#2) and use them as a barbell.
[0022] Fig. 5 is an explanatory diagram of components of the second embodiment, and Fig. 6 is an explanatory diagram of a connection mechanism of the barbell shaft. In the second embodiment, as shown in Figs. 5(a) and (b), the barbell shaft 410 is divided into two parts, #1 (Fig. 5(a)) and #2 (Fig. 5(b)). As shown in Fig. 6(a), at one end of the barbell shaft 410(#1), an insertion sleeve shaft 510 is inserted into one end of the barbell shaft 410(#1) and fixed to the barbell shaft 410(#1) by crimping or welding. The insertion sleeve shaft 510 has an outer diameter that fits snugly into the inner diameter of the barbell shaft 410(#2). A fixing protrusion metal fitting 511 that can be pressed in by a finger is attached to the insertion sleeve shaft 510. When the finger is released, the fixing protrusion metal fitting 511 pops out again to the outside of the insertion sleeve shaft 510 due to the repulsive force of a spring installed inside. Meanwhile, a hole 413 is provided at one end of the barbell shaft 410(#2).
[0023] As shown by arrow 601 in FIG. 6(a), the user presses the fixing protrusion fitting 511 with his / her finger so that the fixing protrusion fitting 511 aligns with the position of the hole 413, and then inserts the insertion sleeve shaft 510 at the tip of the barbell shaft 410 (#1) into one end of the other barbell shaft 410 (#2).
[0024] When the fixing protrusion metal fitting 511 reaches the position of the hole 413, the fixing protrusion metal fitting 511 pops out of the hole 413 to the outside of the barbell shaft 410 (#2) due to the repulsive force of the spring, as shown in Fig. 6 (b). This connects the barbell shafts 410 (#1) and 410 (#2).
[0025] When separating barbell shafts 410(#1) and 410(#2) after use, the user presses fixing protrusion metal fitting 511 protruding from hole 413 of barbell shaft 410(#2) with a finger, and pulls barbell shaft 410(#1) out from barbell shaft 410(#2).
[0026] FIG. 7 is an explanatory diagram of an example of operation of the barbell dumbbell mounting hardware 400(#1) and 400(#2) in the second embodiment having the components of FIG. The barbell dumbbell mounting brackets 400(#1) and 400(#2) are respectively composed of upper barbell dumbbell mounting brackets 401a(#1) and 401a(#2) (Fig. 5(c)), lower barbell dumbbell mounting brackets 401b(#1) and 401b(#2) (Figs. 5(a) and (b)), knob bolts 402(#1) and 402(#2) (Fig. 5(d)), and shaft diameter adjustment rubber members 504a(#1), 504a(#2), 504b(#1), and 504b(#2) (Fig. 5(e)).
[0027] As shown in Fig. 5, one end 411(#1) and 411(#2) of each of the barbell shafts 410(#1) and 410(#2) are pressed flat and then welded and fixed to the lower fittings 401b(#1) and 401b(#2) for mounting dumbbells for barbells. Knob bolt through holes 501b(#1) and 501b(#2) are drilled in each welded portion. Although not shown in particular, bolt tightening nuts are welded to the exits of the knob bolt through holes 501b(#1) and 501b(#2) on the back side of the lower fittings 401b(#1) and 401b(#2) for mounting dumbbells for barbells.
[0028] As shown in Fig. 5(a) and (b), the lower fittings 401b(#1) and 401b(#2) for mounting dumbbells for barbells have fitting connection projections 502b(#1) and 502b(#2), respectively. On the other hand, as shown in Fig. 5(c), the upper fittings 401a(#1) and 401a(#2) for mounting dumbbells for barbells have fitting connection slits 502a(#1) and 502a(#2), respectively.
[0029] When attaching the barbell dumbbell mounting brackets 400(#1) and 400(#2) to the dumbbells 420(#1) and 420(#2), respectively, the user performs the operations shown in FIG. Since the same operations are performed for the barbell dumbbell mounting brackets 400(#1) and 400(#2), the suffixes (#1) and (#2) will be omitted in the following explanation.
[0030] First, as shown in FIG. 7(a), the user inserts the fitting connection protrusion 502b of the lower barbell dumbbell mounting fitting 401b into the fitting connection slit 502a of the upper barbell dumbbell mounting fitting 401a as shown by the arrow 701.
[0031] Next, the user places the shaft diameter adjusting rubber members 504a and 504b shown in FIG. 5(e) on the dumbbell shaft fixing portions 503a and 503b of the upper dumbbell mounting metal fitting 401a for a barbell and the lower dumbbell mounting metal fitting 401b for a barbell, respectively. In order to be able to accommodate various shaft diameters of the dumbbell shaft 421, the shaft diameter adjusting rubber members 504a and 504b may be prepared in a plurality of thicknesses.
[0032] In this state, the user performs the operation shown in FIG. 7(b) while clamping the dumbbell shaft 421 of the dumbbell 420 between the shaft diameter adjusting rubber members 504a and 504b of the dumbbell shaft fixing parts 503a and 503b.
[0033] In FIG. 7(b), the user inserts knob bolt 402 into knob bolt through hole 501a of upper fitting 401a for mounting dumbbells for barbells with his / her fingers 702, and while pinching dumbbell shaft 421, presses upper fitting 401a for mounting dumbbells for barbells in the direction of lower fitting 401b for mounting dumbbells for barbells as shown by arrow 703.
[0034] Next, the user inserts the knob bolt 402 passing through the knob bolt through hole 501a into the knob bolt through hole 501b of the lower fitting 401b for mounting a barbell dumbbell.
[0035] Then, the user fits knob bolt 402 into the nut welded to the back side of knob bolt through hole 501b, and while turning the knob of knob bolt 402 clockwise using finger 702, tightens upper barbell dumbbell mounting bracket 401a to lower barbell dumbbell mounting bracket 401b.
[0036] In this manner, as shown in FIG. 8, a user can easily use the knob bolt 402 to firmly and securely fasten the dumbbell shaft 421 to the upper fitting 401a for mounting a barbell dumbbell and the lower fitting 401b for mounting a barbell dumbbell to which one end 411 of the barbell shaft 410 is welded.
[0037] Here, the lower dumbbell mounting bracket for a barbell 401b, in which the welded portion to one end of the barbell shaft 410, which is the barbell shaft mounting portion, and the dumbbell shaft fixing portion 503b, which is the first portion of the dumbbell shaft mounting portion, are integrally molded, functions as the first dumbbell mounting bracket for a barbell. Moreover, the upper fitting 401a for mounting a dumbbell for a barbell, which has a dumbbell shaft fixing portion 503a that is the second portion of the dumbbell shaft mounting portion, functions as a second fitting for mounting a dumbbell for a barbell. The fitting connecting protrusion 502b, fitting connecting slit 502a, knob bolt 402, and knob bolt through holes 501a and 501b shown in FIG. 7 function as a contact fitting for a barbell dumbbell mounting fitting that fixes the barbell shaft 410 and the dumbbell shaft 421 by tightly fixing the barbell dumbbell lower mounting fitting 401b and the barbell dumbbell upper mounting fitting 401a to each other.
[0038] In the above description, in the first embodiment, the barbell shaft 110 is a single shaft that is not divided. In the second embodiment, the barbell shaft 410 is a shaft that is divided into two. In the present invention, the barbell shaft may be of various specifications, such as a single shaft, a two-piece shaft, or a three-piece shaft.
[0039] As for the material of the barbell shaft, various combinations can be used for the inner pipe (e.g., insertion sleeve shaft 510 in FIG. 5) and the outer pipe (e.g., barbell shafts 410 (#1) and 410 (#2) in FIG. 4) that can be separated, such as “iron pipe x aluminum pipe,” “iron pipe x iron pipe,” or “iron pipe x wooden pipe.” Also, if the barbell shaft is not divided, the material may be a round iron bar.
[0040] In the second embodiment, the fixing protrusion metal fittings 511 are used to connect the barbell shafts 410(#1) and 410(#2), but they may be fixed by bolts. In addition, in the second embodiment, one ends 411(#1) and 411(#2) of the barbell shafts 410(#1) and 410(#2) may be left pipe-shaped or cylindrical without being pressed flat, and a slit may be provided in each of the pipe-shaped or cylindrical ends 411(#1) and 411(#2) that penetrates in the diameter direction, opens onto the one end side, and extends in the axial direction, and the barbell dumbbell mounting lower fittings 401b(#1) and 401b(#2) may be inserted into each slit and fixed by welding.
[0041] In addition, the barbell shaft of the first and second embodiments may be adapted to have various attachments attached so that various types of training can be performed using the barbell. For example, a T-bar row attachment or a squat attachment may be attached. This allows the range of training to be expanded.
[0042] As described above, with the dumbbell mounting fittings for barbells according to the first and second embodiments, or a barbell shaft equipped with such fittings on both ends, dumbbells from various manufacturers can be attached to both sides of the barbell shaft, thereby increasing the amount of training available for dumbbell exercises. [Explanation of symbols]
[0043] Dumbbell mounting bracket for 100 and 400 barbells 101 Dumbbell shaft attachment part 101a Dumbbell shaft attachment part (upper side) 101b Dumbbell shaft attachment part (lower side) 102 Barbell shaft attachment part 102a Barbell shaft attachment part (upper side) 102b Barbell shaft attachment part (lower side) 103 Screw through hole 104 Bolts and screws 110, 410(#1), 410(#2) Barbell shaft 120, 420(#1), 420(#2) dumbbells 121, 421 Dumbbell shaft 122a, 122b, 422a(#1), 422a(#2), 422b(#1), 422b(#2) Dumbbell weights 201 Nut 202, 203 Cylindrical cavity 301 Sleeve Dumbbell mounting bracket for 400(#1) and 400(#2) barbells 401a(#1), 401a(#2) Upper bracket for mounting dumbbells on barbells 401b(#1), 401b(#2) Barbell Dumbbell Mounting Bracket 501a(#1), 501b(#2) Knob bolt through hole 502a(#1), 502a(#2) Slits for metal fittings connection 502b(#1), 502b(#2) Metal fitting connection protrusions 503a, 503b Dumbbell shaft fixing part 504a(#1), 504a(#2), 504b(#1), 504b(#2) Rubber material for adjusting shaft diameter
Claims
1. a barbell shaft attachment portion attached to an end of the barbell shaft; A dumbbell shaft attachment portion for fixing a dumbbell shaft perpendicular to the barbell shaft; Equipped with an upper part in which an upper portion of the barbell shaft attachment portion and an upper portion of the dumbbell shaft attachment portion are integrally molded; a lower part in which a lower part of the barbell shaft attachment part and a lower part of the dumbbell shaft attachment part are integrally molded; Equipped with After the end of the barbell shaft and the dumbbell shaft are sandwiched between the upper part and the lower part, a bolt screw is passed through a screw through hole formed in each of the upper part and the lower part, and a nut is screwed into one end of the bolt screw and tightened to fix the barbell shaft and the dumbbell shaft. Dumbbell mounting bracket for barbells.
2. A structure for attaching dumbbells to a barbell shaft, comprising: A barbell shaft attachment portion attached to an end portion of the barbell shaft; A dumbbell shaft attachment portion for fixing a dumbbell shaft perpendicular to the barbell shaft; Equipped with a first dumbbell mounting member for a barbell in which a first portion of the dumbbell shaft mounting portion and the barbell shaft mounting portion are integrally formed; a second dumbbell mounting member for a barbell in which a second portion of the dumbbell shaft mounting portion and a barbell shaft clamping portion that clamps the end of the barbell shaft together with the barbell shaft mounting portion are integrally formed; Equipped with The second dumbbell mounting member for a barbell is connected to an end of the first dumbbell mounting member for a barbell so as to be rotatable relative to the first dumbbell mounting member for a barbell; the second dumbbell mounting member for a barbell is rotated relative to the first dumbbell mounting member for a barbell, thereby sandwiching the shaft of the dumbbell between the first and second parts of the dumbbell shaft mounting portion and sandwiching the end of the barbell shaft between the barbell shaft mounting portion and the barbell shaft clamping portion, and then fixing the second dumbbell mounting member for a barbell in a state of contact with the barbell shaft and the first dumbbell mounting member for a barbell by a fixing member; Structure for attaching dumbbells to a barbell shaft.
3. A barbell shaft having, at both ends, the dumbbell mounting fixture for a barbell according to claim 1 or the structure for mounting dumbbells to a barbell shaft according to claim 2.
4. The barbell shaft according to claim 3 , wherein the barbell shaft is divided into a plurality of sections and can be connected into one.
5. The barbell shaft according to claim 3 , wherein the barbell shaft is any one of an Olympic shaft, a standard shaft, an EZ shaft, and a triceps bar.
6. The barbell shaft according to claim 3 , wherein the barbell shaft is capable of being fitted with a training attachment.
7. The barbell shaft according to claim 3 , wherein the barbell shaft is constructed using wood.
Citation Information
Patent Citations
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