TWI783634B - Dumbbell bar set - Google Patents

Abstract

The invention is a slidable dumbbell device with a weight adjustment key. The dumbbell machine is equipped with a series of weight plates, which can be selected by pressing and sliding the adjustment button elastically. The number of weight plates can be adjusted safely and reliably with a simple action. The device includes a bracket for storing and unfolding the device, a counterweight plate, and a handle device. The handle device has two spline bolts for supporting the counterweight plate and simultaneously adjusting by means of an adjustment pin. The motion transmission gear moves the spline parts together. The device can be further improved and enhanced with permanent weights and grip options.

Description

Dumbbell Bar Components

The present invention relates to the field of exercise and fitness equipment, in particular equipment for light weight lifting, such as dumbbells, and also equipment suitable for adjustable weights.

Dumbbells are a very popular piece of exercise and fitness equipment. It can provide effective and diverse fitness training. Dumbbells are often used for single-arm lifting, although they are also spread out in pairs so that both arms can be exercised at the same time. Because of the variety of types of exercises that dumbbell workouts can involve, it's helpful to be able to quickly switch from one weight to another to make the most of your workout time. One approach is to use multiple dumbbells of different weights, but this is expensive and creates storage problems.

One method that allows switching from one weight to another without the problems of mass storage is to use adjustable weight dumbbells. Generally, adjustable weight dumbbells include a dumbbell handle, the ends of which are adapted to receive one or more weight plates, and may further include means for locking and securing the weight plates in place for safe use. There are many types of adjustable weight dumbbells on the market.

Please refer to US200405969A for example. This device teaches a device in which adjustment mechanisms are required at each end of the dumbbell handle for bolting the associated weight plates. It is inconvenient and requires extra time to set certain weights since two separate actions are required.

You can refer to US20070184945A, which avoids the above-mentioned defects by using the left and right thread theory. The bolt at the end of the dumbbell can be moved by turning the turntable so that the bolt fixes certain plates of the desired weight.

But because the thread on the threaded rod is a continuous line, the position of the counterweight is inaccurate. Accurate positioning of such dumbbells requires the addition of complex and expensive positioning mechanisms.

There are many dumbbell variants on the market, but none allow precise and balanced weight setting at the same time. This would provide clear advantages. Nothing in the prior art provides an adjustable weight dumbbell that allows and facilitates quick and efficient adjustment of the weight plates and also results in weight changes using the dumbbell device in a balanced and safe manner.

It can be seen that there is a need for an adjustable dumbbell that addresses many of the problems associated with currently available adjustable dumbbells.

The object of the present invention is to provide a weight-adjustable dumbbell with simple structure, convenient use, safety and reliability, which overcomes the shortcomings of the prior art.

The purpose of the present invention is to provide a weight-adjustable dumbbell, which has an adjustment handle, which further enables the user to simply and conveniently select the same amount of weight plates at both ends of the dumbbell bar assembly.

The object of the present invention is to provide a weight-adjustable dumbbell with a weight indicating label on the positioning plate, so that the weight selection is simple and easy.

The object of the present invention is to provide a handle and a positioning plate of a weight-adjustable dumbbell. The handle and the positioning plate have a self-locking function, so the spline bolt body will not move arbitrarily. As a result, the weight stack is securely attached to the dumbbell bar assembly for safe and reliable use and lifting.

The object of the present invention is to provide two spline bolt bodies of a weight-adjustable dumbbell, the two spline bolt bodies can work together through gears, and can be physically extended or shortened by the same amount.

It is an object of the present invention to provide a dumbbell device which provides comfort or safety by enhancing the grip by knurling the grip surface or by providing an alternative material for the grip surface.

The object of the present invention is to provide an adjustable dumbbell device, which can be customized and conveniently used in conjunction with various counterweights.

The object of the present invention is to provide a dumbbell device which can be manufactured by various manufacturing methods.

In order to achieve the above-mentioned purpose, some embodiments of the present invention provide a weight-adjustable dumbbell (comprising a dumbbell handle element, several weight plates and a weight plate base), which achieves the above-mentioned purpose. The dumbbell handle element includes a handle member, two handle brackets, two spline bolt bodies, a positioning gear, an adjusting key and a positioning plate. A plurality of adjustable slots and bolt slots are opened on the handle member. A series of adjustable slots are located on top of one side of the handle member and bolt slots are located on both sides of the handle member. A slide groove is formed on the top of the handle bracket, and guide grooves are formed on both sides of the handle member. Two handle brackets are respectively fixed at both ends of the handle member.

The two splined bolt bodies are respectively inserted into the two ends of the handle component, and are engaged with each other in the handle component through gears. The positioning plate is fixed on the sliding groove of a handle bracket, and the positioning plate is in one of several discrete adjustment positions in the sliding groove, and the number of the several discrete adjustment positions corresponds to the number of weight plates. The adjustment key can pass through the narrow slot of the positioning plate, and the adjustment key can be fixed on the threaded hole of the spline bolt body. There is an oblique opening on each weight plate, and a rectangular slot for accommodating the dumbbell bar assembly is arranged below the oblique opening.

The bevel and the long rectangular slot below the bevel form a "Y" shaped slot. The long rectangular slot has an arc slot for accommodating the spline bolt body. Also have several support grooves on the counterweight plate base.

There is a shaft hole in the above-mentioned handle member. The gear is positioned on the shaft by the shaft hole, rotates around the shaft, and is held in place by a detent. The gears mesh with the teeth inside the body of each spline bolt. The weight stacks are positioned within the base to both ends of the handle member, and the brackets are mated to the brackets of each weight stack. A cover plate is fixed on the sliding groove of the above-mentioned handle bracket by screws.

The above-mentioned adjustable handle includes an adjusting pin, a fixing spring and a positioning seat. By means of the positioning seat, the fixing spring, the limiting groove on the positioning plate, the sliding groove on the handle bracket and the adjustable groove, the adjusting pin is fixed in the threaded hole of an adjusting spline bolt body, so that the two spline bolt bodies can be adjusted at the same time. Move in and out precisely with the same motion. There is a weight indicating label on the above positioning plate. A handle cover is fixed on the above-mentioned positioning seat.

The following detailed description employs the best currently contemplated modes of carrying out exemplary embodiments of the invention. The scope of the present invention is best defined by the scope of the appended patent application. Therefore, the specific embodiments are only intended to illustrate the general principle of the present invention, and are not intended to be limiting.

Broadly speaking, embodiments of the present invention provide a dumbbell apparatus that mates with a series of weight stacks, the number of weight stacks being safely and reliably adjustable with one simple movement. The dumbbell assembly includes a bracket for storing and deploying the dumbbell assembly, a plurality of weight plates, and a handle assembly having two splined bolts supporting the weights and can be adjusted at the same time by means of an adjusting pin which moves the splined bolt body together by moving the transmission gear. The dumbbell set can be further enhanced with permanent weights and grip options.

Referring first to Figures 1 and 2, it can be seen that the main components of the adjustable weight dumbbell 10 according to an exemplary embodiment of the present invention include a dumbbell bar assembly 20, a plurality of weight plates 30 and a base member 40. Figure 1 shows the dumbbell assembly in its standard state, while Figure 2 shows the major components separated from each other so that key features of these major components can be seen. The dumbbell bar assembly 20 is used to accommodate the movable parts of the present invention, so that the weight can be adjusted. Base member 40 is used to store and deploy the entire dumbbell set.

The weight stack 30 can be made of various materials. In some embodiments, the weight plate 30 is made of cast iron. In other embodiments, the weight plate 30 is made of polymer materials such as blown polymer materials. In some embodiments, the blown polymer material can be hollow and filled with a substance to achieve the desired weight. In other embodiments, blowing the polymeric material itself is sufficient to achieve the desired weight.

As shown in FIG. 2 and FIG. 5B , each weight plate 30 has a Y-shaped groove 31 , and the Y-shaped groove 31 includes an upward slope 32 , a long rectangular groove 33 and an arc groove 34 . The arcuate slots 34 allow the dumbbell bar assembly 20 to receive the weight stack 30 and secure the weight stack 30 in place, as will be described more fully herein. The long rectangular slot 33 is used to accommodate the dumbbell bar assembly 20 , and the upper slope 32 acts as a guide to make the dumbbell bar assembly 20 fall into the long rectangular slot 33 . The base member 40 serves to accommodate and position the weight stack 30 . The number of slots is the same as the number of weight plates 30 . The base member 40 also serves to support the dumbbell bar assembly 20 .

Referring now to FIG. 3, in conjunction with FIGS. 4A-4C, 5A-5C, 6A-6C, 7A-7C, the dumbbell bar assembly 20 primarily includes a handle member 21. A plurality of handle brackets 22, an adjusted spline bolt body 23, an adjustable spline bolt body 24, a positioning gear 73, a positioning plate 26, an adjusting pin 27, a cover plate 25 and multiple weight plates 30. A handle bracket 22 is connected to both ends of the handle member 21 . The gripping portion 62 in the middle of the handle member 21 is provided with a knurled surface 61 , which is convenient for the user to hold the gripping portion 62 more safely. A cover plate 25 is arranged on the handle member 21 , and its direction is opposite to that of the positioning plate 26 . The handle bracket 22 also mates with the guide slot 81 to help maintain the alignment of the weight stack 30 . Finally, the handle bracket can be further mated with equal weights 83 at either end to provide permanent stability in use, or simply to provide desired weight resistance.

The handle member 21 is further matched with a hole 71 , the hole 71 can accommodate a pin shaft 72 , and the pin shaft 72 can be further used as a shaft for a positioning gear 73 . The positioning gear 73 passing through the hole 71 is fixed in the handle member 21 by a pin 72 . The spline bolt bodies 23 and 24 are inserted into both ends of the handle member 21 and meshed with each other via a positioning gear 73 . One end of the adjusting spline bolt body 24 has a threaded hole 78 . After the adjustment spline bolt body 24 is fully inserted into the handle member 21, the adjustment pin 27 is positioned in the threaded hole 78 of the adjustment spline bolt body 24 through the sliding groove of the handle bracket 22 and the adjustment groove of the handle member 21, thereby limiting the spline. The key bolt body 24 moves within the functional range.

For example, the cover plate 25 is fixed on the handle bracket 22 by screws 28 . The positioning plate 26 is fixed on the handle bracket 22 by the adjusting pin 27 . The adjustment pin 27 is fixed in the threaded hole 78 of the spline bolt body 24 by the guide groove 81, the coil spring 49, the positioning plate 26, the slide groove and the adjustment groove. Fasten the handle cover over the guide groove 81 (Fig. 5C). A weight body 83 is fixed at each end of the handle member 21 by threads.

The structure of the adjusting spline bolt body 24 is the same as that of the adjusted spline bolt body 23 except for the threaded hole 78 in the adjusting spline bolt body 24. The threaded hole 78 is used to accommodate the threaded set screw portion of the adjusting pin 27. In some embodiments, the structure of the adjusting spline bolt body 24 and the adjusted spline bolt body 23 may be the same, wherein the positioning pin 29 may be inserted into the threaded hole 78 of the adjusted spline bolt body 23 .

The long parts 91 and 92 of each spline bolt body 23 and 24 are extended circumferences, and from each extended circumferential long part 91 and 92 are extended protrusions 93 and 94, and the extended circumferential long parts 91 and 92 can be fitted. Slide in the arc groove 34 of each weight plate 30 . This relationship causes each spline bolt body 23 and 24 to move in and out simultaneously, so that each spline bolt body 23 and 24 extends between the bosses 93 and 94 of the circumferential lengths 91 and 92 and each weight plate 30. The required arc groove 34 cooperates and is promoted together with the weight-adjustable dumbbell 10 .

Each spline bolt body 23 and 24 also has a chipped long portion 95 and 96 with a half chipped circumference. The protrusions 93 and 94 of each notch circumference are placed together for a tight fit within the handle member 21 . The notched long parts 95 and 96 are mated with the meshing teeth 97, and the meshing teeth 97 are mechanically communicated with the positioning gear 73 sandwiched between them through fittings. Thus, as the adjusting spline bolt body 23 moves inward or outward in equal and opposite directions, the adjusting spline bolt body 24 moves inwardly or outwardly following the adjusting pin 27 .

In this way, starting from the weight stack 30 closest to the handle member 21, the protrusions 93 and 94 of each splined bolt body 23 and 24 cooperate with the arcuate slots 34 of the desired weight stack 30 and "select" fit. The heavy sheet 30 is used for the required training activities.

What is currently useful is to show the user how to easily and conveniently make the required adjustments. The required adjustment is accomplished by positioning the base and adjusting pin 27. Referring to Figures 3 and 4A, it can be seen that one of the locating plates 26 is fitted with a series of locating holes 12 interconnecting the narrow passages. An adjustment pin 27 connected to the adjustment spline bolt body 24 is fitted to pass through the channel. When the adjusting pin 27 moves from the inside to the outside or from the outside to the inside, the spline bolt bodies 23 and 24 make the protrusions 93 and 94" of each spline bolt body 23 and 24 selectable by the above-mentioned interaction of the positioning gear 73. "Required number of weight stacks 30.

For ease of selection, the free end of the adjustment pin 27 is provided with a fixed head 47 which accommodates the spring-loaded cover member 42 (see Figure 6A). The spring-loaded cover member 42 further includes an inverted cone member 43 (refer to FIG. 3 ), the inverted cone member 43 is fitted with a hole at the narrow end, and the adjustment pin 27 is closely fitted with the hole.

The adjusting pin 27 has an external thread portion, and the internal thread 46 of the adjusting spline bolt body 24 accommodates the external thread portion. Sufficient distance from the channel to allow the spring-loaded cover member 42 to work.

Therefore, firstly, the adjusting pin 27 can be inserted into the coil spring 49 , then inserted into the wide end of the inverted cone member 43 , and then inserted into the channel, and then the external thread can be screwed into the internal thread 46 of the adjusting spline bolt body 24 .

The diameter of the fixing head 47 is sufficient to hold the coil spring 49 to provide tension when the spring-loaded cover member 42 is pulled up on the fixing head 47 . The spring-loaded cover member 42 can closely fit any one of the required positioning holes 12, 13, 14, 15, 16 through fitting. When the spring-loaded cover member 42 is pulled upward, the adjustment pin 27 is movable.

Press down the adjusting pin 27, and the adjusting pin 27 can move in the positioning plate 26.

Each positioning hole 12, 13, 14, 15, 16 is fitted with movable spline bolt bodies 23 and 24, thereby selecting the required number of weight plates. The tension of the coil spring 49 will keep the adjustment spline bolt body 24 locked in the desired position, thereby "selecting" the correct number of weight stacks 30 .

The positioning plate 26 is marked with the weight of the dumbbell bar assembly corresponding to each position of the adjusting pin 27 .

Note that the knurled grip surface 62 can be eliminated or enhanced by providing some other grip surface such as rubber, plastic, vinyl, cloth, wool or synthetic fibers. Although this substitution is slightly more difficult to manufacture, it makes the device easier and more comfortable to use. The important point here is that variations from the preferred embodiment are likely and it is possible to provide one or more additional features to the dumbbell apparatus while still remaining within the spirit and scope of the invention.

It should also be noted that the spline bolt bodies 23 and 24 are described throughout as having a generally cylindrical configuration along their length, and that the bosses 93 and 94 are referred to throughout as being arcuate in shape, the circle of the rectangular slot 33 of the weight plate. The arc groove 34 cooperates. The spline bolt body can also be made into another cross-sectional shape, such as a rectangle or a polygon, as long as the cross-sectional shape ensures that features such as tight fit, bolted surface and weight plate rectangular groove 33 are used in the handle member 21. The slots 34 cooperate to provide toothed flat surfaces along the flat surfaces of the notched long portions 95 and 96 of each spline bolt body 23 and 24 . without sacrificing Given the user-friendly qualities of the dumbbell device, this choice of cross-sectional shape may facilitate manufacturing.

It should be further noted that the protrusions 93 and 94 do not necessarily have to be arc-shaped, and small part shapes, squares, or any other geometric configurations can be used to replace the arc groove 34 and the rectangular groove 33, so that the protrusions and A stable geometric connection is realized between the receiving parts of the long rectangular slots on each weight plate.

It should be understood, of course, that the foregoing relates to exemplary embodiments of the invention and that changes may be made therein without departing from the spirit and scope of the invention as set forth in the claims below.

10: Weight adjustable dumbbells

12: Positioning hole

13: Positioning hole

14: positioning hole

15: positioning hole

16: positioning hole

20: Dumbbell bar assembly

21: handle component

22: handle bracket

23:Adjusted spline bolt body

24:Adjust the spline bolt body

25: cover plate

26: Positioning plate

27:Adjustment pin

28: screw

29: Locating pin

30: Weight stack

31: Y-shaped groove

32: Upper slope

33: Long rectangular slot

34: arc groove

40: base member

42: Spring-loaded cover member

43: Inverted cone member

46: internal thread

47: fixed head

49: coil spring

61: Knurled surface

62: Grip

71: hole

72:pin shaft

73: positioning gear

78: threaded hole

81: guide groove

83: counterweight body

91: long department

92: long department

93: Raised part

94: Raised part

95: missing corner length

96: long missing corner

97: meshing teeth

Figure 1 is a perspective view of an adjustable dumbbell assembled and used according to an exemplary embodiment of the present invention. Figure 2: depicts the adjustable dumbbell of Figure 1 with the main parts separated in relative positions so that all main parts can be seen. Figure 3: An exploded view of the adjustable dumbbell in Figure 1. Figures 4A to 4C show various cross-sectional views of the adjustable dumbbell bar assembly; among them, Figure 4A: the oblique side sectional view; Figure 4B: the front view of the left bracket member after being cut; Figure 4C: the system Top sectional view. Figures 5A to 5C are diagrams depicting various key features of the adjustment of the dumbbell bar assembly; where, Figure 5A is a front view of the dumbbell bar assembly with the left bracket member cut away and showing the adjustment pen and first position ; Figure 5B: depicts a view of the weight plate showing how it is received by the spline bolt body; Figure 5C: depicts the adjustment key in the first position. Figures 6A to 6C depict various views of the equipment; Figure 6A: the front view when a single weight plate is selected; Figure 6B: the left side sectional view when a weight plate is selected; Figure 6C: the system Top view when selecting a weight plate. Figure 7A to Figure 7C are schematic diagrams of the working principle of the present utility model; Figure 7A: a front view of four counterweights; Figure 7B: a cross-sectional view of the left side of four counterweights; Figure 7C: It is the front cross-sectional view when four weight plates are selected.

10: Weight adjustable dumbbells

20: Dumbbell bar assembly

Claims (9)

A dumbbell bar assembly wherein a desired number of weight plates to be lifted by a user are connected by positioning a single adjustment pin, comprising: a plurality of weight plates each having a slot for connection to the dumbbell bar assembly; one or more base members for positioning the plurality of weight plates relative to the dumbbell bar assembly; two splined bolt bodies with a spline at each end of the dumbbell bar assembly a keyed bolt body engaged with said slot of said weight plate for connecting said weight plate to said dumbbell bar assembly; wherein said number of weights are engaged by said two splined bolt bodies The position of the single adjustment pin controls the required number of weight plates, and is used to adjust the weight plate to be lifted by the user; wherein, the single adjustment pin can be elastically pressed down, and the single adjustment pin can be pressed down after pressing down. The adjustment pin can be moved to one or more positions, thereby selecting the required number of counterweight stacks; wherein, the single adjustment pin is connected to one of the splined bolt bodies, wherein the movement of the single adjustment pin will cause two said spline bolt bodies move simultaneously; and a locating plate is included, said locating plate is engaged with a series of locating holes, said locating holes are interconnected with narrow channels, and are connected to said spline bolt bodies. The adjustment pin can pass through the narrow channel through fitting. The dumbbell bar assembly according to claim 1, wherein the weight plate has a parallel groove and an arc groove, the parallel groove is narrower near the periphery, and the arc groove is between the weight plate Wider near the center. The dumbbell bar assembly as claimed in claim 1, wherein the weight plate is made of blow-molded polymer material. The dumbbell bar assembly according to claim 2, wherein the splined bolt body has a raised portion, the raised portion passes through the parallel groove of the weight plate, and is connected to the weight plate The arc groove joint. The dumbbell bar assembly as claimed in claim 1, wherein said spline bolt body has a plurality of teeth meshing with teeth of a positioning gear. The dumbbell bar assembly as claimed in claim 5, wherein the positioning plate fixes the adjusting pin at a fixed position corresponding to the required number of weight plates. The dumbbell bar assembly as claimed in claim 6, further comprising a spring that elastically orients the adjustment pin away from the base member and keeps the adjustment pin at the fixed position, the spring can be pressed down, The adjusting pin can move after pressing down. The dumbbell bar assembly according to claim 7, wherein the positioning plate is marked with the weight of the dumbbell bar assembly corresponding to each position of the adjustment pin. The dumbbell bar assembly as claimed in claim 8, wherein the dumbbell bar assembly is covered with a material that enhances the user's grip.

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