JPH0717320Y2 - Dumbbell barbell weight stop - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a dumbbell or barbell weight stopper.

(Prior Art) Conventionally, dumbbells and barbells with which weights can be changed according to the type of exercise, the physical strength of the user, and the like have been sold and known. Such dumbbells and barbells are composed of a shaft, a weight, and a weight stopper, and a user who wants to change the weight removes the weight stopper fixing the weight from the shaft and inserts and removes the weight body. After adjusting the weight, the weight stopper is fixed to the shaft again.

In such an operation, the method of fixing the weight stopper is to fix it from the side surface of the stopper with a screw or screw it into the shaft. In this method, removing and fixing the weight stopper is troublesome, and it takes time to replace the weight. It was a thing. In particular, after exercising with a dumbbell or barbell, it was not easy to change the weight due to muscle fatigue, and it was not easy to exchange weights.

Therefore, a weight stopper such as Japanese Utility Model Publication No. Sho 49-38031 has been devised, but it has the drawback of being complicated in structure and operation and expensive in price.

(Problems to be solved by the invention) Therefore, there has been a demand for a dumbbell or barbell which has a simple structure for the weight stopper of the dumbbell or barbell and is not only easy to remove but also capable of securely fixing the weight. .

(Means for Solving the Problems) In order to solve such problems, the present invention is directed to
A plurality of grooves are provided in the circumferential direction of the shaft of the barbell, and the longitudinal cross-sectional shape of the grooves has at least a portion having the same diameter as the outer diameter of the shaft.
There are more than one portion, and the portion other than the portion having the same diameter is formed so as to gradually become a deep groove from the portion having the same diameter with respect to the circumference of the shaft. Is provided at a position symmetrical to the same diameter portion, a stopper incorporating a tip body, a spring, and a spring stopper is provided in the through hole, and the tip body of the stopper protrudes from the inner circumference of the weight stopper. The protrusion is fitted into and removed from the groove by the expansion and contraction action of the spring, and the weight is fixed and released by the weight stopper.

(Operation) Since the present invention has the above-described structure, the tip of the stopper that protrudes from the inner circumference of the weight stopper and fits into and disengages from the groove provided in the circumferential direction of the shaft is moved to the depth of the groove by the tension of the spring. Adapt and fix the weight and the weight stop.

First, in order to replace the weight, the weight stopper can be removed from the shaft by rotating the weight stopper in the circumferential direction of the shaft.
The spring of the stopper provided on the stopper is compressed and the tip body moves in the groove. Then, when the tip body moves to the same diameter portion as the outer diameter of the shaft, the tip body separates from the groove of the shaft. Thus, the weight stopper can move in the longitudinal direction of the shaft, and the weight stopper and the weight can be pulled out from the shaft.

Next, after replacing the weight, to fix the weight with the weight stopper, push the weight stopper into the shaft, the spring of the stopper provided in the weight stopper is compressed and the tip body can be retracted and inserted, When pushed further, at the first groove of the grooves formed on the shaft, the tip body is fitted into the groove by the extension action of the spring. further,
If you rotate the weight stopper in the circumferential direction of the shaft,
The spring of the stopper expands and contracts, the tip body moves in the groove, and when the tip body rotates to the same diameter portion as the outer diameter of the shaft, the tip body comes out of the groove. Then, after pushing the weight stopper until the weight is fixed, when the weight stopper is rotated again, the tip body of the stopper is fitted into the groove by the extension of the spring by the same action as described above, and the weight stopper is fixed. .

In this way, the weight stopper can be easily removed from the shaft or inserted into the shaft to fix the weight by the structure of the groove provided on the shaft and the stopper of the weight stopper.

(Embodiment) The drawings show an embodiment of the present invention in which a plurality of grooves 1 are provided in a shaft A, and a fixed stopper D is attached so that the weight C does not move toward the grip portion of the shaft A. The tip end 2a of the protruding stopper 2 attached to the weight stopper B is naturally retracted toward the outer periphery 8 so that the weight stopper B can be easily inserted.

FIG. 2 is a sectional view taken along the line AA of FIG. 1, and its cross-sectional shape is a substantially triangular shape. Each apex portion has the same diameter portion 1a as the outer diameter of the shaft A, and each apex portion has a flat portion 1b. To form a deep groove 1c, and a small recess 1d is provided at the center of each flat surface 1b. Small recess 1d
Is provided, when the weight stopper B is rotated,
The tip body 2a of the stopper 2 attached to this is housed in the small recess 1d, and the weight stopper B is stopped. Therefore, since the tip end body 2a of the stopper 2 is always fitted and stopped at the deepest position of the groove 1, the weight stopper B can be fixed securely.

FIG. 3 shows a weight stopper B to be inserted into the shaft A. The weight stopper B has a through hole 6 extending from the outer circumference 8 to the inner circumference 7.
3 are provided at approximately equal intervals so as to be symmetrical with the same diameter portion 1a. Then, the through hole 6 has a tip body 2a, a spring 2b, and a spring stopper.
A stopper 2 incorporating 2c is provided, and a tip body 2a of the stopper 2 is formed so as to project 3 from an inner circumference 7 of the weight stopper B. The through hole 6 has a step 11 and the tip body 2a has a brim.
12 is provided to prevent the tip body 2a of the stopper 2 from coming off. It is also possible to prevent the tip 2a of the stopper 2 from coming off by making the through hole 6 and the stopper 2 shown in the drawing tapered so that the diameter becomes smaller toward the inner circumference 7. The spring stopper 2c is fixed by a method such as screwing or fitting.

In the drawing, in the longitudinal cross-sectional shape of the groove provided on the shaft, the outer diameter of the shaft A and the same diameter portion 1a are three, and the number of the stoppers 2 symmetrical to this is three, but each is one.
The number of stoppers 2 may be smaller than the number of the same diameter portions 1a. Further, in the plurality of grooves 1 provided, if the same diameter portion as the outer diameter of the shaft A is provided so as to be continuous in the length direction of the shaft A, the weight stopper B can be easily pulled out from the shaft A.

FIG. 4 is an explanatory diagram showing the weight stopper B being inserted into the shaft A.

(Effect of the Invention) Since the present invention has the above-described structure, in order to replace the weight C, when the weight stopper B is rotated in the circumferential direction of the shaft A, the weight stopper B is fitted into the groove 1 of the shaft A. The tip 2a of the stopper 2 has a portion having the same diameter as the outer diameter of the shaft A.
The weight stopper B and the weight C can be pulled out from the shaft A by being pulled toward the outer periphery 8 side by the 1a and coming out of the groove 1.

After replacing the weight C, in order to fix the weight C again with the weight stopper B, push the weight to the fixed stopper D, rotate the weight stopper B, and rotate the tip body 2a of the stopper 2 into the deep groove 1c of the groove 1. The weight C and the weight stopper B can be fixed on the shaft A by moving the weight C to the shaft A.

Thus, removing the weight stopper B from the shaft A or inserting the weight stopper B into the shaft A to fix the weight C can be performed by a simple operation of rotating and moving the weight stopper B. The weight C can be easily replaced even during muscle fatigue after exercise using a dumbbell or barbell.

Further, the weight stopper of the present invention is not so complicated in structure as the conventional one, so that it is easy to manufacture and inexpensive.

[Brief description of drawings]

FIG. 1 is a side view of the shaft portion, and FIG. 2 is AA of FIG.
FIG. 3 is a partially cutaway enlarged front view of the weight stopper, and FIG. 4 is an explanatory view showing a state in which the weight stopper is inserted into the shaft. 1: groove, 1a: same diameter part, 1b: flat surface part, 1c: deep groove, 1d: small recessed part, 2:
Stopper, 2a: Tip body, 2b: Spring, 2c: Spring stopper, 3:
Projection, 6: Through hole, 7: Inner circumference, 8: Outer circumference, A: Shaft, B: Weight stopper, C: Weight, D: Fixed stopper.

Claims (1)

[Scope of utility model registration request] 1. A plurality of grooves are provided in a circumferential direction of a shaft of a dumbbell / barbell, and the groove has at least one portion having the same diameter as the outer diameter of the shaft. The weight stopper is formed so as to be gradually deeper from the same diameter portion to the circumference of the shaft, and a separate weight stopper is provided with through holes extending from the outer circumference to the inner circumference at positions symmetrical to the same diameter portion. A stopper incorporating a tip body, a spring, and a spring stopper is provided in the through hole, and the tip body of the stopper is projected from the inner circumference of the weight stopper, and the tip body is fitted into the deep groove portion of the groove. A dumbbell and barbell weight stopper characterized in that the weight is fixed.