1. Field of the Invention
The present invention relates to the structure of a pull-up fitness exercise machine, and more particularly to the pull-up fitness exercise machine having a support plate always situated at a low static position during the beginning and the end of the use of the pull-up fitness exercise machine to facilitate users to step on to get on or step down to get off a support plate and carry out the expected exercise conveniently and safely.
2. Description of the Prior Art
Basically, a pull-up fitness exercise machine is an indoor exercise apparatus that simulates “High Bar” or “Rings”. Of course, the pull-up fitness exercise machine may also be sued for various different types of limb exercises such as stretching the upper limbs or body building squats for the lower limbs, depending on the user's familiarity with the use of the machine and the user's personal exercise needs. Obviously, the pull-up fitness exercise machine is an excellent diversified indoor fitness apparatus; and most of the pull-up fitness exercise machines adopts the gravitational force of the whole of the user's body weight as the source of the load for the exercise, so that the design of the pull-up fitness exercise machines generally have an assisted pushing member (such as a spring pneumatic cylinder) installed at a position under the support plate to assist the user to apply forces, so as to avoid the situation that the user's physical strength is unable to bear the load of the user's body weight repeatedly. In other words, when we pull a pull ring unit installed at a top cantilever downwardly by both hands to lift the support plate situated at the bottom, the assisted pushing member will always provide an appropriately set upward pushing force to assist the user to apply forces in order to lift the user's body more easily.
Since the assisted pushing member always pushes the support plate, the support plate is generally situated at a position with a specific height (depending on the pushing length of the assisted pushing member) when the pull-up fitness exercise machine is not in use. When the user wants to use the pull-up fitness exercise machine, it is relatively inconvenient for the user to step on the support plate or the user is afraid of stepping on the support plate with a specific height from the ground. Of course, some of the conventional pull-up fitness exercise machines provide a stepwise platform disposed next to the lifted support plate to facilitate users to step on the support plate. However, such arrangement also makes the users psychologically scared of the expected ascending speed of the support plate, and to resist the use of such pull-up fitness exercise machine. Obviously, such mechanical design is hardly acceptable to users.
In addition, after the users finish with the exercise and want to leave the support plate, the users also have the same hesitation and fear, because once the user (with a body weight) leaves the support plate, the support plate will be pushed and lifted by the assisted pushing member immediately, so that the user have to be very careful while leaving the support plate. Occasionally, accidents or injuries caused by falling from exercise equipments of this sort occur, and the design of the conventional pull-up fitness exercise machines has a safety issue and definitely requires improvements.
It is a primary object of the present invention to provide a pull-up fitness exercise machine in which a top and down relation between a cantilever at the top and a support plate at the bottom together with a latch effect among a linking rope, a rotary latching plate, an elastic member and a linking hook lever are provided, and the support plate are always situated at a low static position at the beginning and at the end of the use of the fitness exercise machine, so that users may step up to get on or step down to get off the support plate easily to ensure the safety of use.
It is another object of the present invention to provide a pull-up fitness exercise machine having a height adjusting device installed at a top cantilever, an angle adjusting device installed at an angular crotch of a pull ring, and a pushing force adjusting device installed to an assisted pushing unit to fit users of different body types and physical strengths, so as to meet the using requirements and improve the overall practicality and convenience of the pull-up fitness exercise machine.
According to the invention, a pull-up fitness exercise machine comprises a base for securing all components, an upright column fixed to the rear of the base, a top cantilever pivotally coupled to the top of upright column, a linking rope coupled to an end of the cantilever, and an elastic member driven by the other end of the linking rope for constantly pulling a rotary latching plate to rotate appropriately. A pull ring unit is installed at the other end of the cantilever and operated together with a pull string and a plurality of pulleys to provide an up and down displacement stroke for pulling the support plate. Moreover, a rotating rod assembly is pivotally coupled to the bottom of the upright column, and the other end of the rotating rod assembly is pivotally coupled to the support plate. An assisted pushing unit is interposed between the rotating rod assembly and the base and has an adjustable pushing force to provide an appropriate upward pushing force to the support plate. In addition, a linking hook lever is coaxially coupled to a first pivot point of the rotating rod assembly and configured to be corresponsive to a hook post of the rotary latching plate for constantly locking the rotating rod assembly and maintaining the support plate at a low static position. In this way, the pull ring unit can be pulled to perform an expected motion when the support plate bears a gravitational force, the cantilever is pulled downwardly, and the linking hook lever is released from a locked status relative to the rotary latching plate. When the external force of the pull ring unit disappears, the support plate is descended by the gravitational force to resume its original position and locked to a low static position automatically.
The technical measures and characteristics of the present invention will become clearer in light of the following detailed description of an illustrative embodiment of this invention described in connection with the drawings.
With reference to
In other words, after a user (not shown in the figure) finishes the exercise with the pull-up fitness exercise machine, and before the user leaves the support plate 50, the user's body weight naturally drives the support plate 50 to descend slowly. Since the user has released the force applied to the pull ring unit 40, therefore the elastic member 32 will pull the rotary latching plate 33 to its original latch position, and a latch opening 521 of the linking hook lever 52 is aligned precisely to the hook post 331. Now, the user may leave the support plate 50 at ease without worrying an accidental lift (that resumes the original latch position automatically as shown in
In
In
In
From the aforementioned design, the cantilever 30 is limited by the space of the hollow section 21, so that the cantilever 30 just may use the shaft connecting element 201 as a rotating axis and can be rotated within a limited angle, and such limited rotating angle can turn the rotary latching plate 33 to reach an unlocked status of the whole mechanism.
In
The pull ring unit 40 includes a pull string 41, four pulleys 42 and two pull rings 43, wherein two sets of pulleys 42 are pivotally coupled to an end of the branching section 3091 of the two angular crotches 309, and the other two sets of pulleys 42 are respectively and pivotally coupled to both sides of the rear of the support plate 50, and the pull ring 43 is fixed to both ends of the pull string 41, so that when the support plate 50 is released, a user may pull any one of the pull rings 43 or both of the two pull rings 43 in order to pull the support plate 50 to move up and down.
In
In
For simplicity, the key elements are represented by respective numerals in the drawings and provided for illustrating the technical characteristics of the present invention but not intended for limiting the scope of the invention.
In summation of the description above, the present invention complies with the patent application requirements, and thus is duly filed for patent application.
Many changes and modifications in the above-described embodiments of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of the appended claims.
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