Arm exerciser

Abstract

This invention relates to an arm strength trainer, comprising a head, two working arms, and at least one gas spring. The upper ends of each of the two working arms are connected to the head via a rotating shaft. The at least one gas spring is connected between the two working arms such that its lower end is rotatably connected to one working arm and its upper end is connected to the upper side of the other working arm. A movable hole is formed on the upper side of each working arm, extending in an arc shape centered on the lower end of the gas spring. The arm strength trainer includes a slider that supports the upper end of the gas spring in a manner movable along the movable hole. The slider includes a limiting portion for fixing the slider.

Description

Technical Field

[0001] This invention relates to arm strength devices, and more specifically, to an arm strength device comprising a pair of working arms and a gas spring, wherein the elastic force provided by the gas spring is adjustable. Background Technology

[0002] Generally speaking, a strength training device is an exercise machine used to train the muscle strength of the arms, shoulders, etc. It includes a head with a spring and a pair of working arms that are connected to the spring in a rotating manner.

[0003] The arm exerciser works by the user gripping the left and right working arms with both hands and applying force to bring the two working arms closer together, thus applying muscle strength to the arms and shoulders. Then, the force is released to allow the working arms to return to their original separated positions, while the muscles in the arms and shoulders relax. This action is repeated to perform the exercise.

[0004] However, previous arm strength trainers had the drawback that users could not easily adjust the intensity according to their own muscle strength. Summary of the Invention

[0005] Technical issues

[0006] The purpose of this invention is to provide an arm strength exerciser that allows users to adjust the elastic force provided by a gas spring during arm exercises, so that they can adjust the intensity according to their own muscle strength and perform arm exercises.

[0007] Technical solution

[0008] To achieve the above objectives, the arm extension device of the present invention includes a head, two working arms, and at least one gas spring. The upper ends of each of the two working arms are connected to the head by means of a rotating shaft, allowing them to move closer to or further away from each other. The at least one gas spring is connected between the two working arms such that its lower end is rotatably connected to one working arm and its upper end is connected to the upper side of the other working arm. A movable hole is formed on the upper side of the working arm to which the upper end of the gas spring is connected, extending in an arc shape centered on the lower end of the gas spring. The arm extension device includes a slider that supports the upper end of the gas spring in a manner that allows it to move along the movable hole. The slider includes a limiting part that engages within the movable hole to fix the upper end of the gas spring in an adjusted position.

[0009] According to an embodiment of the present invention, engaging teeth are formed on the inner side of the movable hole along the length direction, and the limiting part of the slider has engaging teeth that mesh with the engaging teeth. The limiting part can move between an engaging position and a disengaged position. The engaging position is the position where the engaging teeth engage with the engaging teeth to fix the slider at the adjusted position, and the disengaged position is the position where the engaging teeth disengage from the engaging teeth to allow the slider to move.

[0010] According to an embodiment of the present invention, toothed portions are formed on the outer peripheral surface of the upper end of each of the two working arms, and the toothed portions mesh with each other so that the two working arms are rotatably coupled to the head.

[0011] According to an embodiment of the present invention, the gas spring includes two gas springs, which are arranged alternately on the front and rear sides of the two working arms.

[0012] According to an embodiment of the present invention, the slider includes a slider body, the slider body including a first body and a second body disposed on both sides of the working arm and coupled to each other through the moving hole, for engaging with the upper end of the gas spring; the limiting part has an axial shape movably supported between the first body and the second body, and the meshing tooth is formed protruding from the middle part of the axial direction of the limiting part. By means of the limiting part moving along the axial direction intersecting the moving hole, the meshing tooth can be disposed in the moving hole at the engaging position, or disengaged from the moving hole to be disposed in the releasing position.

[0013] According to an embodiment of the present invention, the arm strength device includes a support spring that presses the limiting portion toward the engagement position so that the engaging teeth of the limiting portion remain engaged with the connecting teeth within the moving hole.

[0014] According to an embodiment of the present invention, a receiving groove is formed on the inner side of the first body. The receiving groove is used to receive the engaging teeth of the limiting part to form the release position. When the limiting part is pressed, the limiting part moves axially while compressing the support spring, so that the engaging teeth are received in the receiving groove.

[0015] According to an embodiment of the present invention, the limiting portion extends outward from the second body and has a flange formed at its upper end, and the supporting spring is located between the flange and the second body.

[0016] According to an embodiment of the present invention, the slider body includes a moving guide disposed within the moving hole, and has a smooth surface on the side opposite to the engaging teeth of the moving hole.

[0017] Invention Effects

[0018] According to the present invention, the elastic force provided by the gas spring in the arm strength device can be easily adjusted.

[0019] According to the arm extension device of the present invention, by moving the limiting part of the slider from the engaged position to the disengaged position, the fixation of the upper end of the gas spring relative to the working arm can be easily released, thereby making the position of the upper end easy to adjust. Thus, the elastic force provided by the gas spring can be easily adjusted.

[0020] According to the present invention, the upper position of the gas spring can be adjusted with a relatively simple structure, and the fixing force at the adjusted position can be ensured. Attached Figure Description

[0021] Figure 1 This is a diagram showing the overall shape of the arm strength device of the present invention.

[0022] Figure 2 The partial cross-sectional view of the arm extension device of the present invention shows the connection relationship between the head and the working arm.

[0023] Figure 3 and Figure 4 This is a diagram showing the components and engagement state of the slider in the arm strength device of the present invention.

[0024] Figure 5 It is a partial cross-sectional view used to describe the state of the limiting part in the slider being in the engagement position.

[0025] Figure 6 It is a partial cross-sectional view used to describe the state of the limiting part in the slider moving to the release position. Detailed Implementation

[0026] This invention can be modified in various ways and can have many forms, as will be described in detail in the text. However, this is not to limit the invention to a specific disclosed form, but should be understood as including all modifications, equivalents, and substitutions within the scope of the invention's concept and technology. Similar reference numerals are used for similar constituent elements in the description of the figures.

[0027] The terms used herein are for the purpose of distinguishing one constituent element from another. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. Unless the context clearly indicates otherwise, the singular includes the plural.

[0028] Figure 1 This is a diagram showing the overall shape of the arm strength device of the present invention. Figure 2 The partial cross-sectional view of the arm extension device of the present invention shows the connection relationship between the head and the working arm.

[0029] Reference Figure 1 and Figure 2 The arm strength device 10 of the present invention includes: a head 100; two working arms 200; a gas spring 300 staggered between the two working arms 200; and a slider 400 that can adjust the engagement position of the working arm 200 and the upper end 320 of the gas spring 300.

[0030] The head 100 is located in the upper middle of the arm extension device, and the two working arms 200 are rotatably connected to the head 100 via a rotating shaft 110. The head 100 includes a front plate 101 and a rear plate 102, and the upper ends of the working arms 200 are connected to the mounting space between the front plate 101 and the rear plate 102.

[0031] The two working arms 200 consist of a working arm 201 on one side and a working arm 202 on the other side, which are symmetrically configured relative to the center line of the head 100 and perform actions of approaching and moving away from each other. In this specification, reference numeral 200 typically refers to the working arm, and reference numerals 201 and 202 are used when it is necessary to distinguish the two working arms from each other.

[0032] Gas springs 300 are staggered between two working arms 200. The lower end 310 of the gas spring 300 is attached to one working arm 201 or 202, and the upper end 320 is attached to the other working arm 202 or 201. The gas spring 300 provides a force in the direction that opposes the movement of the two working arms 200 toward each other.

[0033] The upper end 320 of the gas spring 300 is adjustablely attached to the working arm 200.

[0034] A movable hole 250 is formed on the upper side of the working arm 200, which is movably engaged with the upper end 320 of the gas spring 300. The movable hole 250 extends in an arc shape with the lower end 310 of the gas spring, which is rotatably engaged with the working arm 200, as the center.

[0035] A slider 400 is attached to the upper end 320 of the gas spring 300. The engagement position of the upper end 320 of the gas spring 300 is adjusted by moving the slider 400 along the moving hole 250 or fixing it at the adjusted position.

[0036] According to an embodiment of the present invention, two gas springs 300 may be arranged alternately between two working arms 200. In this specification, reference numeral 300 typically refers to a gas spring, and the terms "one side gas spring" and "the other side gas spring" are used when it is necessary to distinguish multiple gas springs from each other, in which case they may be identified as reference numerals 301 and 302.

[0037] like Figure 2As shown, the upper end portion 210 of the working arm 200 is disposed in the mounting space between the front plate 101 and the rear plate 102. The upper end portion 210 of the working arm 200 is rotatably supported by a rotating shaft 110 that passes through the front plate 101 and the rear plate 102 and is fixed therethrough.

[0038] A welding arm 120 is disposed between the front plate 101 and the rear plate 102 along the upper side edge of the head 100. The welding arm 120 supports the mounting space defined between the front plate 101 and the rear plate 102. Furthermore, contact portions 122 are formed at both ends of the welding arm 120 to contact the upper surface 212 of the upper end portion 210 of the working arm 200 and support the working arm 200. The contact portions 122 contact the upper surface 212 of the upper end portion so that the working arm 200 can be held in the starting position. The upper surface 212 of the upper end portion 210 of the working arm 200 has a contour that can contact and restrict the contact portions 122 so that the working arm 200 can rotate beyond the starting position. Grooves corresponding to the contact portions 122 can be formed on the upper surface 212. The welding arm 120 is fixed by fixing bolts that connect the front plate 101, the contact portions 122, and the rear plate 102.

[0039] A hook 150 may be formed in the head 100. The hook 150 may be formed in the form of a hole through the head 100, so that the arm exerciser can be hung on a hook attached to the wall for storage.

[0040] Reference Figure 1 and Figure 2 The upper end 210 of the working arm 200 is formed as a plate-shaped arm that is attached to the head 100 via a rotating shaft 110 and extends downward. A handle 280 for the user to grip is provided on the lower side of the working arm 200. When the user grips the handle 280 and applies force to the working arm 200, the working arm 200 rotates around the rotating shaft 110, and the lower ends move towards each other. If the force is removed, the working arm 200 returns to the starting position by the elastic force of the gas spring 300. In this specification, the position where the two working arms 200 are brought to maximum proximity by applying force is called the approach position, and the position where the two working arms 200 return to their starting position by removing the force is called the starting position.

[0041] On the opposing outer peripheral surfaces of the upper end portion 210 of the working arm 200, which is connected to the head 100 via a rotating shaft 110, meshing toothed portions 220 are formed. The working arm 200 operates with the toothed portions 220 of the upper end portion 210 of one working arm 201 and the upper end portion 210 of the other working arm 202 meshing with each other. Therefore, the movements of one working arm 201 and the other working arm 202 are linked together. Therefore, one working arm 201 and the other working arm 202 move symmetrically about the central axis. Therefore, even if the elastic force applied between one working arm 201 and the other working arm 202 is different, they can operate symmetrically.

[0042] On the underside of the toothed portion 220, a contact surface 230 can be formed that contacts each other when the working arms 200 move to the approach position. When one working arm 201 and the other working arm 202 rotate around the rotation axis 110 and approach each other, the contact surface 230 contacts directly or places the fixing bolts or the like in the middle to make contact, thereby limiting the approach position.

[0043] On the upper part of the toothed portion 220, an upwardly extending protrusion 240 may be formed. The starting position of the working arm 200 can be set by contact with the protrusion 240, and the approach position can be set by contact between the protrusion 240 and the contact portion 122 of the welding arm 120.

[0044] The aforementioned support device, which can support the working arm 200 in the starting position and the approach position, can be used together or selectively, allowing the working arm 200 to operate between the set starting position and the set approach position while preventing it from drifting.

[0045] A movable hole 250 is formed on the upper side of the working arm 200, in which the upper end 320 of the air supply spring 300 is movably engaged.

[0046] A movable hole 250 extends through the surface of the working arm 200 from its upper side and is formed elongated along its length. The movable hole 250 is formed in an arc shape along the rotation path of the upper end 320 of the gas spring 300, centered on the lower end 310 of the gas spring 300. The number of engagement teeth 255 with the movable hole 250 formed determines the adjustment level of the spring force.

[0047] Engaging teeth 255 are formed on the inner surface of the moving hole 250 along its length. The limiting part 450 engages with the engaging teeth 255 within the moving hole 250 by means of the engaging teeth 455 of the limiting part 450 of the slider 400. Therefore, the slider 400 can be fixed within the moving hole 250, and the position of the upper end 320 of the gas spring 300 attached to the slider 400 can be fixed. If the engagement between the limiting part 450 and the engaging teeth 255 is released, the upper end 320 of the gas spring 300 can be guided and moved along the moving hole 250 together with the slider 400.

[0048] The lower end 310 of the gas spring 300 is attached to one working arm 200, and the upper end 320 is attached to the moving hole 250 of another working arm 200 via a slider 400. The lower end 310 of the gas spring 300 extends in a direction intersecting the extending direction of the gas spring 300, including a connecting end that extends through the surface of the working arm 200 and a fixing nut connected to the connecting end to fix the connecting end.

[0049] One embodiment of the present invention includes two gas springs 300, which can be arranged alternately at the front and rear of the arm exerciser 10. For example, at the front of the arm exerciser, the upper end 320 of one gas spring 301 is connected to the moving hole 250 of one working arm 201, and the lower end 310 is rotatably connected to the lower side of the other working arm 202. At the rear of the arm exerciser 10, the upper end 320 of the other gas spring 302 is connected to the moving hole 250 of the other working arm 202, and the lower end 310 is rotatably connected to the lower side of one working arm 201.

[0050] The upper ends 320 of two staggered gas springs 300 are independently connected to the movable hole 250 by means of a slider 400, thus realizing the position adjustment of the upper ends 320 of the gas springs 300 respectively. The strength of the elastic force provided by the two gas springs 300 can be adjusted differently.

[0051] In the arm extension device 10 of the present invention, the upper ends 210 of the working arms 200 mesh and rotate with each other via the toothed portions 220, so that the elastic force applied to the working arms 200 is distributed to the two working arms 200 and performs its function. Therefore, by combining the elastic force adjustment positions of the two gas springs 300, the intensity of the elastic force applied when the working arms 200 move can be adjusted to various positions.

[0052] Figure 3 and Figure 4 This invention illustrates the components and engagement state of the slider in the arm strength device. Figure 5 This shows the slider with the limiting part in the engaged position. Figure 6 This shows the state where the limiting part in the slider has moved to the released position.

[0053] Referring to the accompanying drawings, the slider 400 includes: a slider body 410, the upper end of which is connected to the air spring 300 and movably fixed in the moving hole 250; and a limiting part 450, which is connected to the slider body 410 and moves between an engaged position and a disengaged position.

[0054] The slider body 410 includes a first body 412 disposed on one side surface of the working arm 200 through a moving hole 250 and a second body 422 disposed on the other side surface of the working arm 200. The first body 412 and the second body 422 are joined to each other through the moving hole 250 and are guided to move by the moving hole 250.

[0055] At the upper end 320 of the gas spring 300, a connecting shaft 325 is formed along a direction intersecting the extending direction. The connecting shaft 325 is connected to the slider body 410. The connecting shaft 325 passes through the first body 412, the moving guide 430, and the second body 422 and extends, with a fixing nut 328 connected to its end. The portion of the connecting shaft 325 that connects to the first body 412 has an enlarged diameter portion, so that it can be connected to the first body 412 in a predetermined position.

[0056] According to an embodiment of the present invention, the slider body 410 may include a movement guide 430 disposed within a movement hole 250, guiding the slider body 410 to move along the movement hole 250. The side 432 of the movement guide 430 opposite to the engaging teeth 255 is formed with a smooth, flat surface. Therefore, if the limiting portion 450 moves to the released position, the fixing of the limiting portion 450 to the slider 400 is released, and the slider 400 can be guided to move gently along the movement hole 250.

[0057] The movable guide 430 extends from the first body 412 into the movable hole 250, and a mounting hole 423 is formed on the second body 422 for accommodating the end of the movable guide 430, thereby guiding the assembly of the first body 412 and the second body 422. The fixing member 440 can pass through the movable guide 430 and is used to fix the first body 412 and the second body 422 to each other.

[0058] The limiting portion 450 is shaft-shaped and movably supported between the first body 412 and the second body 422. On the outer peripheral surface of the middle portion of the shaft-shaped portion of the limiting portion 450, a meshing tooth 455 protrudes outwards and engages with the engaging tooth 255 of the moving hole 250. The limiting portion 450, supported between the first body 412 and the second body 422, can move along the axial direction of the limiting portion in a direction intersecting the moving hole 250. Therefore, by means of the axial movement of the limiting portion 450 intersecting the moving hole 250, the meshing tooth 455 can engage with the engaging tooth 255 and be disposed within the moving hole in an engaged position, or disengage from the engaging tooth 255 and be disposed in a disengaged position outside the moving hole 250 upon disengagement from the engaging tooth 255.

[0059] A receiving groove 414 is formed on the slider body 410. When the limiting part 450 moves to the release position, the receiving groove 414 allows the meshing teeth 455 to disengage from the moving hole 250. The receiving groove 414 is formed on the inner side of the first body 412 and accommodates the meshing teeth 455 when the limiting part 450 disengages from the moving hole 250 and moves to the release position. Figure 6 The image shows the state where the limiting part 450 has disengaged from the moving hole 250 and moved to the release position, at which time the engaging tooth 455 is located in the receiving groove 414.

[0060] The limiting portion 450 is elastically supported to maintain the engaged position. The limiting portion 450 extends to the outside of the second body 422 and has a flange 454 formed at its upper end. A support spring 458 is disposed between the flange 454 and the second body 422, and the support spring 458 presses in the direction protruding from the flange 454, that is, presses the limiting portion 450 in the direction of engagement. The support spring 458 may be formed in the form of a coil spring, and a spring groove for inserting one end of the support spring 458 may be formed on the surface of the second body 422.

[0061] Reference Figure 5 With the aid of the support spring 458, the limiting portion 450 is elastically supported so that the engaging teeth 455 are held in the engaged position within the moving hole 250. The limiting portion 450 is held in the engaged position by the elastic force provided by the support spring 458, that is, the engaging teeth 455 and the mating teeth 255 engage and mesh with each other in a tooth-to-tooth manner, thus maintaining a fixed position. If no external force is provided to disengage from the engaged position supported by the support spring 458, for example, if no force is applied to press the support spring 458, the limiting portion 450 remains in the engaged position, while a fixing force is provided to hold the upper ends of the slider 400 and the gas spring 300 in a fixed position.

[0062] Reference Figure 6If the user presses the limiting part 450, the limiting part 450 descends and moves to the release position while the flange 454 compresses the support spring 458. The release position is when the engaging teeth 455 disengage from the moving hole 250 and move into the receiving groove 414. When the limiting part 450 is in the release position, the teeth of the engaging teeth 455 disengage from the engaging teeth 255 of the moving hole 250, thus removing the force that fixes the slider 400 in a specific position in the moving hole 250. Therefore, the user can move the slider 400 to adjust the upper end 320 of the gas spring 300 to the desired position.

[0063] After adjusting the position of the upper end 320 of the gas spring 300, the force pressing the flange 454 of the limiting part 450 is removed. With the help of the elastic force of the support spring 458, the limiting part 450 rises to the engagement position, that is, the engagement tooth 455 rises into the moving hole 250, and at the same time, the engagement tooth 455 and the engagement tooth 255 re-engage. Therefore, the upper end position of the gas spring 300 is fixed in the adjusted state.

[0064] The closer the upper end 320 of the gas spring 300 is to the lower end 252 of the moving hole 250 along its length, the greater the force required to move the working arm 200 to the approach position; conversely, the closer the upper end 320 of the gas spring 300 is to the upper end 251 of the moving hole 250 along its length, the smaller the force required to move the working arm 200 to the approach position. The elasticity of the arm exerciser can be adjusted by changing the fixed position of the upper end 320 of the gas spring 300 using the slider 400. Therefore, the user can adjust the elasticity of the arm exerciser according to their own muscle strength or desired intensity and perform exercises accordingly.

[0065] The above description of the present invention is for illustrative purposes only. Those skilled in the art will understand that other specific forms can be readily derived without altering the technical concept or essential features of the invention. Therefore, the embodiments described above should be understood in all respects as exemplary rather than limiting. The scope of the invention is represented by the following claims, and the meaning and scope of the claims, as well as all modifications or variations derived from their equivalents, should be interpreted as encompassing the scope of the invention.

Claims

1. An arm exerciser, comprising a head, two working arms, and at least one gas spring, wherein the upper ends of each of the two working arms are connected to the head via a rotating shaft, allowing them to move closer to or further away from each other; the at least one gas spring is connected between the two working arms such that its lower end is rotatably connected to one working arm and its upper end is connected to the upper side of the other working arm, characterized in that... On the upper side of the working arm, which is connected to the upper end of the gas spring, a movable hole is formed extending in an arc shape centered on the lower end of the gas spring. Engaging teeth are formed on the inner surface of the movable hole along its length direction. The arm strength device includes a slider that supports the upper end of the gas spring in a manner movable along the movable hole. The slider includes a limiting part that engages within the moving hole to fix the upper end of the gas spring in the adjusted position. The slider includes a slider body, which is connected to the upper end of the gas spring via a connecting shaft. The limiting part has meshing teeth that engage with the slider body and mesh with the engaging teeth. The limiting part can move between an engaged position and a disengaged position. The engaged position is when the meshing teeth engage with the engaging teeth to fix the slider at the adjusted position. The disengaged position is when the meshing teeth disengage from the engaging teeth to allow the slider to move. The slider body includes a moving guide disposed within the moving hole, and has a smooth surface on the side opposite to the engaging teeth of the moving hole.

2. The arm strength trainer according to claim 1, characterized in that, The outer peripheral surface of each of the two working arms has a toothed portion formed thereon, which meshes with each other so that the two working arms are rotatably connected to the head.

3. The arm strength trainer according to claim 1, characterized in that, The gas spring includes two gas springs. The two gas springs are arranged alternately at the front and rear of the two working arms.

4. The arm strength trainer according to claim 1, characterized in that, The slider body includes a first body and a second body disposed on both sides of the working arm and joined together, separated by the moving hole; The limiting part has an axial shape that is movably supported between the first body and the second body. The meshing teeth are formed protruding from the outer peripheral surface of the limiting part. The limiting part moves along an axial direction that intersects with the moving hole. The meshing teeth are arranged in the moving hole at the meshing position or disengaged from the moving hole so that they can be arranged at the disengaged position.

5. The arm strength trainer according to claim 4, characterized in that, The arm strength device includes a support spring that presses the limiting part toward the engagement position so that the engagement teeth of the limiting part remain engaged with the connecting teeth in the moving hole.

6. The arm strength trainer according to claim 5, characterized in that, A receiving groove is formed on the inner surface of the first body, the receiving groove being used to receive the engaging teeth of the limiting portion to form the release position. When the limiting part is pressed, the limiting part moves axially while compressing the support spring, so that the meshing teeth are accommodated in the receiving groove.

7. The arm strength trainer according to claim 5, characterized in that, The limiting portion extends outward from the second body and has a flange at its upper end, with the supporting spring located between the flange and the second body.

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