BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an elasticity adjustment structure of physical training device, particularly one that may adjust its elasticity to meet different needs of users.
2. Description of Prior Arts
Principle of conventional martial training device is: one punching bag (such as speed ball or filler bag), when punched by external force, will swing back and forth utilizing elasticity of elastomer connecting to said punching bag.
The elasticity of elastomer of said physical training device is fixed so elastic strength cannot be adjusted for different needs.
Moreover, there is training device utilizing steel tube to change the elasticity of its elastomer. When the punching bag is impacted with external force, the elasticity curve of the said elastomer which it is connected to is not smooth enough. The stress is concentrated on the intersection point of said steel tube and said elastomer; thus, it is easy for the steel tube and elastomer structures to age and be impaired.
Thus, there are foregoing drawbacks of conventional elastic structure of physical training device in prior art to be improved.
SUMMARY OF THE INVENTION
To overcome the existing problems of prior art, present invention provides an elasticity adjustment structure of physical training device, which may adjust its elasticity in accordance with different needs; and makes the elastic curve more smooth so stress is not over concentrated on certain point, the load of materials is reduced thus also reduces cost. Product safety and reliability are improved as well.
The present invention discloses an elasticity adjustment structure of physical training device, which comprises one elastomer adjustment set; and said elastomer adjustment set further comprises one relatively soft first elastomer and at least one relatively hard second elastomer. By changing the overlapping area of these two elastomers with different softness, the elasticity of the elasticity adjustment structure may be adjusted.
Wherein, said first elastomer is an elastic object further comprises one first junction and at least one second junction; said first junction is located on one end of said first elastomer and connected and fixed to one end of one connecting rod; said second junction is located on the other end of said first elastomer and connected and fixed to another connecting rod or one base. Said second elastomer is an elastic object with higher rigidity than said first elastomer, and can be adjusted to installation positions with different depths of said first elastomer so that the elasticity of said elasticity adjustment structure may be adjusted in accordance with different needs and that the elastic curve is smooth. Said second elastomer further comprises at least one first junction and at least one second junction; said first junction is located on one end of said second elastomer and installed to said first elastomer; said second junction is located on the other end of said second elastomer and fixed to said connecting rod or connected to another connecting rod at different location, so the depth position on said first elastomer which said first junction of second elastomer is installed can be adjusted to change the elasticity of said elasticity adjustment structure.
Preferably, said first elastomer comprises at least one fin-shaped vane section located on the side of said first elastomer. Said second elastomer may be installed inside or outside said first elastomer. When said second elastomer is installed outside said first elastomer, said first elastomer comprises at least one fin-shaped vane section located on the side to support horizontal force. While being impacted by external force, the barycenter will be still inside said elastic structure. Said first junction of second elastomer may be installed on different depth positions of said vane section of first elastomer for adjusting elasticity to meet different demands. When said second elastomer is installed inside said first elastomer, said first junction of second elastomer is installed to different depth positions of said first elastomer for adjusting elasticity of said elastic structure to meet different demands.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a three-dimensional view of embodiment A of present invention.
FIG. 2 is a three-dimensional view of embodiment B of present invention.
FIG. 3 is another three-dimensional view of embodiment B of present invention.
FIG. 4 is a three-dimensional view of embodiment C of present invention.
FIG. 5 is a three-dimensional view of embodiment D of present invention.
FIG. 6 is another three-dimensional view of embodiment D of present invention.
FIG. 7 is a three-dimensional view of embodiment E of present invention.
FIG. 8 is a three-dimensional view of embodiment F of present invention.
FIG. 9 is another three-dimensional view of embodiment F of present invention.
FIG. 10 is a sectional view of embodiment A of present invention.
FIG. 11 is a sectional view of embodiment B of present invention.
FIG. 12 is a sectional view of embodiment C of present invention.
FIG. 13 is a sectional view of embodiment D of present invention.
FIG. 14 is a sectional view of embodiment E of present invention.
FIG. 15 is a sectional view of embodiment F of present invention.
FIG. 16 is a three-dimensional view of embodiment G of present invention.
FIG. 17 is a three-dimensional view of embodiment H of present invention.
FIG. 18 is a sectional view of embodiment G of present invention.
FIG. 19 is a sectional view of embodiment H of present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The presently preferred embodiment and related aspects of the invention will now be described with reference to the accompanied drawings.
Please refer to FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, and 19 for different three-dimensional views and sectional views of different embodiments of elasticity adjustment structure of physical training device; wherein said elasticity adjustment structure comprise one elastomer adjustment set 10.
As shown in FIG. 1, 4, or 7, one end of connecting rod 30 is fixed and connected to one punching bag 40. The other end of said connecting rod 30 is fixed and connected to one end of said elastomer adjustment set 10. The other end of said elastomer adjustment set 10 is fixed and connected to one end of base 20.
As shown in FIG. 2, 3, 5, 6, 8 or 9, one end of connecting rod 30 is fixed and connected to one punching bag 40. The other end of said connecting rod 30 is fixed and connected to one end of said elastomer adjustment set 10. Another connecting rod 30′ is fixed and connected to one base 20 with one end and to the other end of said elastomer adjustment set 10 with the other end.
As shown in FIG. 16 or 17, one end of connecting rod 30 is fixed and connected to one handle 50. The other end of said connecting rod 30 is fixed and connected to one end of said elastomer adjustment set 10. The other connecting rod 30′ is fixed and connected to one handle 50 with one end and to the other end of said elastomer adjustment set 10 with the other end.
Said elastomer adjustment set 10 further comprises one first elastomer 11 and at least one second elastomer 12.
Wherein, said first elastomer 11 is an elastic object and further comprises one first junction 112 and at least one second junction 113; said first junction 112 is located on one end of said first elastomer 11 while said second junction 113 is located on the other end of said first elastomer 11. Said second elastomer 12 is an elastic object with higher rigidity than said first elastomer 11. Said second elastomer 12 further comprises one first junction 121 and at least one second junction 122; said first junction 121 is located on one end of said second elastomer 12 while said second junction 122 is located on the other end of said second elastomer 12.
Said first junction 112 of first elastomer 11 is fixed and connected to the other end of said connecting rod 30; said second junction 113 of said first elastomer 11 is fixed and connected to said connecting rod 30′ (as shown in FIG. 2, 3, 5, 6, 8, 9, 16, or 17) or said base 20 (as shown in FIG. 1, 4, or 7); said first junction 121 of said second elastomer 12 is installed to said first elastomer 11; said second junction 122 of said second elastomer 12 may be fixed and connected to said connecting rod 30 or different position of said connecting rod 30′ in order to adjust the depth position on said first elastomer 11 which said first junction 121 of said second elastomer 12 is installed.
As shown in FIG. 10, said second elastomer 12 may be installed outside said first elastomer. Wherein, said first elastomer 11 has at least one fin-shaped vane section 111 located on the side. Said first junction 121 of said second elastomer 12 is installed on said vane section 111 of first elastomer 11; one end of said connecting rod 30 comes with one first junction 31 and at least one second junction 32. Said first junction 31 of connecting rod 30 is fixed and connected to said first junction 112 of first elastomer 11; said second junction 113 of first elastomer 113 is fixed and connected to said base 20. Said second junction 122 of second elastomer 12 may be fixed and connected to said second junction 32 of connecting rod 30 at different positions so that the said first junction 121 of second elastomer 12 is installed on said vane section 111 of first elastomer 11 at different depth positions. Thus, the elasticity of said elasticity adjustment structure may be adjusted.
As shown in FIG. 11, said second elastomer 12 may be installed outside said first elastomer. Wherein, said first elastomer 11 has at least one fin-shaped vane section 111 located on the side. Said first junction 121 of said second elastomer 12 is installed on said vane section 111 of first elastomer 11; one end of said connecting rod 30 comes with one first junction 31 and at least one second junction 32. Said first junction 31 of connecting rod 30 is fixed and connected to said first junction 112 of first elastomer 11; one end of said connecting rod 30′ comes with one first junction 31′; said second junction 113 of first elastomer 11 is fixed and connected to said first junction 31′ of connecting rod 30′. Said second junction 122 of second elastomer 12 may be fixed and connected to said second junction 32 of connecting rod 30 at different positions so that the said first junction 121 of second elastomer 12 is installed on said vane section 111 of first elastomer 11 at different depth positions. Thus, the elasticity of said elasticity adjustment structure may be adjusted.
As shown in FIG. 12 or 14, said second elastomer 12 may be installed inside first elastomer 11. Wherein, said first junction 121 of second elastomer 12 is installed inside said first elastomer 11; one end of said connecting rod 30 comes with one first junction 31 and at least one second junction 32. Said first junction 31 of connecting rod 30 is fixed and connected to said first junction 112 of first elastomer 11; said second junction 113 of first elastomer 113 is fixed and connected to said base 20. Said second junction 122 of second elastomer 12 may be fixed and connected to said second junction 32 of connecting rod 30 at different positions so that the said first junction 121 of second elastomer 12 is installed inside said first elastomer 11 at different depth positions. Thus, the elasticity of said elasticity adjustment structure may be adjusted.
As shown in FIG. 13, said second elastomer 12 may be installed inside first elastomer 11. Wherein, said first junction 121 of second elastomer 12 is installed inside said first elastomer 11; the end of said connecting rod 30 comes with one first junction 31. Said first junction 31 of connecting rod 30 is fixed and connected to said first junction 112 of first elastomer 11; one end of said connecting rod 30′ comes with one first junction 31′ and one second junction 32′; said second junction 113 of first elastomer 11 is fixed and connected to said first junction 31′ of connecting rod 30′. Said second junction 122 of second elastomer 12 may be fixed and connected to said second junction 32′ of connecting rod 30′ at different positions so that the said first junction 121 of second elastomer 12 is installed inside said first elastomer 11 at different depth positions. Thus, the elasticity of said elasticity adjustment structure may be adjusted.
As shown in FIG. 15, said second elastomer 12 may be installed inside first elastomer 11. Wherein, said first junction 121 of second elastomer 12 is installed inside said first elastomer 11; one end of said connecting rod 30 comes with one first junction 31 and at least one second junction 32. Said first junction 31 of connecting rod 30 is fixed and connected to said first junction 112 of first elastomer 11; one end of said connecting rod 30′ comes with one first junction 31′; said second junction 113 of first elastomer 11 is fixed and connected to said first junction 31′ of connecting rod 30′. Said second junction 122 of second elastomer 12 may be fixed and connected to said second junction 32 of connecting rod 30 at different positions so that the said first junction 121 of second elastomer 12 is installed inside said first elastomer 11 at different depth positions. Thus, the elasticity of said elasticity adjustment structure may be adjusted.
Said first junction 112 of first elastomer 11 is fixed and connected to one end of said connecting rod 30; said second junction 113 of said first elastomer 11 is fixed and connected to said connecting rod 30′ (as shown in FIG. 16, or 17); said first junctions 121 of said second elastomers 12 are installed inside said first elastomer 11; each said second junction 122 of said second elastomers 12 is fixed and connected respectively to different positions of said connecting rod 30 and said connecting rod 30′ in order to adjust the depth positions of said first junctions 121 of said second elastomers 12 installed on said first elastomer 11.
As shown in FIG. 18, each said second elastomer 12 may be installed inside first elastomer 11. Wherein, each said first junction 121 of second elastomers 12 is installed inside said first elastomer 11; one end of said connecting rod 30 comes with one first junction 31 and at least one second junction 32. Said first junction 31 of connecting rod 30 is fixed and connected to said first junction 112 of first elastomer 11; one end of said connecting rod 30′ comes with one first junction 31′ and at least one second junction 32′; said second junction 113 of first elastomer 11 is fixed and connected to said first junction 31′ of connecting rod 30′. Each said second junction 122 of second elastomers 12 is fixed and connected respectively to said second junction 32 of connecting rod 30 and second junction 32′ of connecting rod 30′ at different positions so that the said first junction 121 of second elastomers 12 is installed inside said first elastomer 11 at different depth positions. Thus, the elasticity of said elasticity adjustment structure may be adjusted.
As shown in FIG. 19, each said second elastomer 12 may be installed inside first elastomer 11. Wherein, each said first junction 121 of second elastomers 12 is installed inside said first elastomer 11; one end of said connecting rod 30 comes with one first junction 31 and at least one second junction 32. Said first junction 31 of connecting rod 30 is fixed and connected to said first junction 112 of first elastomer 11; one end of said connecting rod 30′ comes with one first junction 31′ and at least one second junction 32′; said second junction 113 of first elastomer 11 is fixed and connected to said first junction 31′ of connecting rod 30′. Each said second junction 122 of second elastomers 12 is fixed and connected respectively to said second junction 32 of connecting rod 30 and second junction 32′ of connecting rod 30′ at different positions so that the said first junction 121 of second elastomers 12 is installed inside said first elastomer 11 at different depth positions. Thus, the elasticity of said elasticity adjustment structure may be adjusted.
Joining said second elastomer 12 and said first elastomer 11 with different rigidity at different depth positions to create different overlapping area so that the elastomer adjustment set 10 may create a smooth elastic curve and hence elasticity of the said elasticity adjustment structure may be adjusted.
Although the present invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the invention as hereinafter claimed.
Patent Grant
8931767
