Training device for targeted development of chest and / or back muscles

Abstract

The invention relates to a training device for the targeted development of the chest and / or back muscles of a user by means of a force resistance, wherein the force resistance for muscle training is realized by means of a respective restoring force of a spring or several springs, comprising a housing, a traction mechanism system, a transmission system and a force introduction system, wherein the traction mechanism system has at least one spring for generating the force resistance and is mechanically connected to the force introduction system via the transmission system in a geometrically guided manner, wherein the user, during use, engages with a first limb on a first lever arm of the force introduction system, which lever arm is rotatable about a first lever axis, and when the first lever arm is moved by a first lever angle about the lever axis, the force resistance is experienced on the first limb and the traction mechanism system,the transmission system and the force introduction system are arranged on or in the housing, wherein the transmission system has a first force transmission ratio that can be changed depending on the first lever angle, wherein the amount of the respective force resistance for the respective current first lever angle can be adjusted by means of a force profile of the variable first force transmission ratio that depends on the respective current first lever angle.

Description

The invention relates to a training device for the targeted build-up of the chest and / or back muscles of a user according to the preamble of claim 1.Previous training devices usually use weights in order to build up a counter pressure on operating elements for a user. In this case, the basic setting of the weights is usually possible by means of a plug connection, so that a specific number of weights can be preselected for the user. One disadvantage here is, among other things, that the weight is constant in each case via training, as a result of which a restoring force for the user is also constant in each case. This constant weight offers disadvantages in training, since in particular no natural muscle stress can be simulated.The object of the invention is to improve the prior art.The object is achieved by an exercise device for the targeted build-up of the chest and / or back muscles of a user by means of a force resistance according to claim 1.It is a core idea of the invention that a transmission system of the training device has a first force transmission ratio that can be changed depending on a respective lever angle, so that, for example, a corresponding individual force transmission ratio is present at a respective position of the lever arm along the lever angle. For this purpose, a force profile dependent on the current first lever angle is used in order to configure a respective amount of the respective force resistance to be adjustable.In particular, the force introduction system is equipped with a second lever arm, so that in particular a symmetrical training for the chest and / or back muscles is made possible by means of two lever arms. In this case, the corresponding force introduction system can be equipped with a respective force transmission ratio for the respective lever arm, wherein corresponding force transmission ratios can also be configured identically.In particular, the training device has a synchronizing mechanism which synchronizes corresponding lever arms. For example, such a synchronizing mechanism is implemented by means of a crossed belt and associated deflection pulleys.The variable power transmission ratio can be defined in particular by means of a respective variable effective radius of a respective belt pulley. Furthermore, the transmission system can have a spring lever connected to a spring or a plurality of spring levers operatively connected to a plurality of springs, wherein the respective variable force transmission ratio can be fixed during a movement by means of a respective, in particular adjustable, articulation radius and / or by means of a specifically fixed articulation point on the belt pulley and a variable articulation radius resulting therefrom.It is a further core idea of the invention that the first lever axis and / or the second lever axis is or are arranged vertically, wherein the respective lever arm is or are then arranged rotatably in a horizontal plane. In particular, respective axes of rotation of, for example, a corresponding belt pulley for setting the power transmission ratio can be arranged horizontally.The respective belt drive can be formed by means of a V-belt, by means of a cable and / or by means of a wire cable.In order to be able to set a basic level of a force resistance for the user, the respective prestress of the spring or springs for setting the force resistance can be adjustable. In particular, this is effected by means of a mechanical prestressing of the respective spring by means of a thread.In a further embodiment, an adapted training possibility can be created by means of a respective spring adapted to a specific training request, for example by means of a progressively or degressively wound helical spring or a progressive or degressive spring pack.It should be mentioned that the invention can be embodied in the respective embodiments in a significantly more compact, smaller and also lighter manner compared to known training devices, such that training with emulated natural, in particular progressive, load is possible with a low overall weight of the arrangement. Thus, the device according to the invention can be used in small spaces, on low-load ceilings and / or also in mobile devices, vehicles or aircraft, without exceeding permissible weights, for example.The invention is explained in more detail below with reference to exemplary embodiments. They show FIG. 1 shows a functional unit of a training device in an isometric overview illustration, FIG. 2 shows a schematic sectional illustration of the training device of FIG. 1 in a front view, FIG. 3 shows a schematic view in phantom of the training device of FIGS. 1 and 2 in an isometric view from the front, FIG. 4 is a schematic, rear isometric view of the training device of FIGS. 1 to 3; and FIG. 5 shows an overview of the training device of FIGS. 1 to 4 with the functional unit and an additional unit in an isometric view.A training device 101 is used for training the chest and / or back muscles of a person. Furthermore, the training apparatus with additional devices (not shown in the figures) can be used for extended back and arm training. The training device has a functional unit 173 in an upper region and an additional unit 175 in a lower region.Within a housing 103 with a downwardly directed base 105 the essential functional parts of the training device 101 are accommodated. At an upper side of the housing 103, two symmetrically disposed levers 121 having respective bent handles 123 serve for grasping by a person. The training device 101 is placed on the floor or suspended attached to a wall, wherein additional holders or a frame can also be used.Each lever 121 is fixed on a shaft 125 with a wing nut 127. Within the housing 103, the respective shaft 125 is connected in a rotationally fixed manner to a belt pulley 131 and to a belt pulley 133 lying beneath it. The respective pulleys 133 serve with a crossed tension belt 143 for synchronizing both levers 121, in that the synchronous belt 141 is wound in a crossed manner around the respective pulleys 131 and thus causes an opposing synchronous movement of the two levers 121.The pulleys 133 located below the pulleys 131 are wrapped around by a respective tension belt 143. Here, a rotation axis 191 of the respective shafts 125 is perpendicular so that the respective pulleys 131 and 133 are arranged horizontally.The respective pull belt 143 is directed by roller guides 135 onto a respective crescent 151. The respective crescent 151 is received on an axis 153, wherein the axes 153 are arranged on a rotation axis 193 horizontally and orthogonally to the rotation axis 191. It should be mentioned in this regard that the radius of the crescent 151 can each vary, but is substantially constant in the example of the figures shown. Substantially 180° with respect to a starting point of the tension belt 143 on the crescent 151 a holding point 155 is arranged on the respective crescent 151. At this holding point 155, a vertically arranged tension spring 157 is arranged in each case, which is fixed at a respective fixed point 159 on a coupling bridge 161 on the opposite side. If a respective lever 121 is now operated by the operator, the respective belt pulley 131 is rotated, so that synchronization takes place by means of the timing belt 141. Further, the respective pulley 133 is synchronously moved, so that the tension belt 143 is pulled and tensioned with respect to the crescent 151, respectively. Then, the respective crescent 151 is forcibly rotated about the axis 153, thus eventually biasing the spring 157. By selecting a corresponding local radius of the crescent 151 and / or the arrangement of the holding point 155 on the crescent 151 for the respective design, a variable transmission ratio can thus be set, and in particular the variable transmission ratio can be set by a respective instantaneous angle of the respective lever 121 about the axis of rotation 191.The coupling bridge 161 can be prestressed in the height direction by means of a set screw 163, in that an operator can set the corresponding position of the coupling bridge 161 with respect to the crescent panes 151 by means of a threaded rod on a cross grip 165. Consequently, by rotating the cross grip 165, the basic prestress of the system and thus the respective force level can be adjusted for the training.A weight 177 is accommodated within the add-on unit 175 arranged at the bottom, which weight can be loaded with an additional spring 179. The spring is fixed at a fixed point 183 in the lower region of the training device 101 and engages the weight 177. The weight in turn is connected to a stop point 181. The weight is guided in a supporting body 169 and loads a pulley block (concealed by the supporting body 169 in FIG. 5 ) which acts on a fastening ring 167. A tension arrangement consisting of ropes and rollers can be attached to the fastening ring 167 by means of a carabiner or a shackle, so that the resistances applied by means of the weight 177 and the spring 179 and translated by means of the pulley block can be applied to the tension arrangement. For this purpose, it should be mentioned that the spring 179 and also remaining springs within the overall arrangement can be wound progressively or degressively, so that a path-dependent application of force is made possible.The mentioned pulling arrangement can then be deflected into arbitrary planes by means of deflection rollers, so that, for example, overhead exercises are also made possible with, for example, pulling handles or pull rods for gripping.List of reference characters101 Exercise machine 103 Housing 105 Base 121 Lever 123 Handle 125 Shaft 127 Wing nut 131 Pulley 133 Pulley 135 Roller guide 141 Synchronous belt 143 Tension belt 151 Crescent pulley 153 Axis 155 Holding point 157 Spring 159 Fixed point 161 Coupling bridge 163 Adjusting screw 165 Cross handle 167 Fastening ring 169 Supporting body 173 Functional unit 175 Additional unit 177 Weight 179 Spring 181 Stop point 183 Fixed point 191 Axis of rotation 193 Axis of rotation

Claims

Training device for the targeted construction of the chest and / or back muscles of a user by means of a force resistance, wherein the force resistance for muscle training is realized by means of a respective restoring force of a spring or a plurality of springs, having a housing, a traction mechanism system, a transmission system and a force introduction system, wherein the traction mechanism system has at least one spring for generating the force resistance and is mechanically operatively connected to the force introduction system in a geometrically guided manner via the transmission system, wherein the user acts with a first limb during use on a first lever arm of the force introduction system, which lever arm is rotatable about a first lever axis, and experiences the force resistance on the first limb when the first lever arm is moved about the lever axis by a first lever angle, and the traction mechanism system, the transmission system and the force introduction system are arranged on or in the housing, characterized in that, the transmission system has a first power transmission ratio variable depending on the first lever angle, wherein the amount of the respective power resistance for the respective current first lever angle can be adjusted by means of a power profile of the variable first power transmission ratio dependent on the respective current first lever angle.Training device according to claim 1, characterised in that the force introduction system has a second lever arm rotatable about a second lever axis, wherein the user acts on the second lever arm of the force introduction system with a second limb during use and experiences the force resistance on the second limb when the second lever arm is moved about the second lever axis by a second lever angle, wherein the transmission system has a second force transmission ratio variable depending on the second lever angle, wherein the amount of the respective force resistance for the respective current second lever angle can be adjusted by means of a force profile of the variable second force transmission ratio dependent on the respective current second lever angle, wherein in particular the first lever arm and the second lever arm are coupled synchronously movably by means of a synchronizing mechanism and / or wherein in particular the first force transmission ratio and the second force transmission ratio are configured identically.Training device according to claim 2, characterised in that the synchronizing mechanism is formed by means of a respective deflection pulley accommodated axially parallel to the respective lever axis and a belt drive guided around the deflection pulleys in a crossed manner.Training device according to one of the preceding claims, characterized in that the transmission system has a belt pulley which is mechanically operatively connected to the first lever arm and / or to the second lever arm, wherein the respective variable force transmission ratio is fixed by means of a respective active radius of the respective belt pulley, which active radius is variable in particular via a rotational angle.Training device according to one of the preceding claims, characterized in that the transmission system has a spring lever connected to the spring or a plurality of spring levers operatively connected to a plurality of springs, wherein the respective variable force transmission ratio can be adjusted by means of an in particular adjustable articulation radius and / or by means of an in particular adjustable angle of application of the respective spring with respect to a spring lever rotation axis.Training device according to one of the preceding claims, characterized in that the first lever axis and / or the second lever axis is or are arranged vertically, wherein the first lever arm and / or the second lever arm is or are arranged rotatably in a horizontal plane.Training device according to one of the preceding claims 3 to 6, characterized in that a respective belt drive is formed by means of a V-belt, by means of a cable and / or by means of a cable.Training device according to one of the preceding claims, characterized in that a respective prestress of the spring or springs for setting the force resistance can be set, in particular by means of a mechanical prestress of the respective spring by means of a thread.

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