Jumping exercise equipment

Abstract

The present invention relates to a jumping exercise device, and more particularly to a jumping exercise device that allows for elasticity adjustment of a leaf spring and uses a coil spring to supplement the spring reserve generated by a user's jumping motion. By providing an elastic reserve spring reserve complement part at the bottom of the leaf spring, a jumping exercise device that can supplement the spring reserve generated by a user's jumping motion can be provided. In addition, the noise and impact generated during jumping motion can be minimized, and by providing a fixing lever that can stop the rotation of a rotatable footboard, a desired exercise can be selectively provided between jumping motion and hip rotation motion. At the same time, by providing an elastic footboard part, the impact generated during jumping motion can be primarily buffered, thereby mitigating the impact applied to the user.

Description

[Technical field]

[0001] The present invention relates to a jumping exercise machine, and more particularly to a jumping exercise machine in which the elasticity of a leaf spring can be adjusted and an extra spring force complementing part is used to complement the extra spring force generated by a user's jumping motion. [Background technology]

[0002] Generally, jumping exercise equipment such as trampolines requires a large surface area because it operates by suspending multiple coil springs from an iron frame, and has the disadvantages of being unable to adjust the elasticity or attach / detach the coil springs.

[0003] In addition, because trampolines are made of cloth, it is difficult for users to maintain their balance, and due to the nature of trampolines, it is difficult to attach handles to them, which poses the risk of injury to users when using them. In addition, there is the problem that loud friction noises are generated by the operation of multiple coil springs.

[0004] In order to solve these problems, Patent Document 1: Korean Patent Publication No. 10-2006-0003127 discloses a jumping machine that includes an ignition device that is activated by a jumping device, a main body 12 equipped with a spring that acts as a cushion, and upper and lower stepping plates 14 and 16 that are connected to the main body 12 so as to transmit pressure under the weight of the user to operate the jumping device.

[0005] In addition, Patent Document 2: Korean Patent Publication No. 10-2013-0043421 discloses a jumping and rotating motion machine, in which an elevating shaft 20 inserted inside a support tube 11 mounted vertically in the center of a base 10 is supported by a first bearing 11b and a first spring 11a to rise and fall, a platform 21 fixed to the upper part of the elevating shaft 20 is elastically supported by a second spring 22a to rise and fall, a rotating shaft 30 is inclined and attached to a boss 22 of the platform 21 and supported by a second bearing 22b, and an inclined footboard 31 is attached to the upper part of the rotating shaft 30 so that the footboard 31 can rotate and rise and fall.

[0006] Patent Document 3 (Korean Patent No. 10-1180510) discloses a jumping machine for strengthening lower limb joints and muscles, which includes a base plate 10 with a handle 11, a step plate section 30 with one end axially fixed on the base plate 10, and an elastic member 50 that applies elasticity to the step plate section 30, and the step plate section 30 is composed of a connecting member 310 axially fixed on the base plate 10 and a step plate 330 axially fixed to the other end of the connecting member 310 so as to be rotatable in the left and right directions. The jumping machine is equipped with a rotation angle measuring unit 70 that measures the left and right rotation angle of the step plate 330 and an acceleration measuring unit 90 that measures the up and down acceleration of the step plate 330, and a rod cell 40 that is provided on the base plate 10 where the lower part of the connecting member 310 of the step plate section 30 hits when a user jumps, and measures the pressure of the step plate section 30.

[0007] However, the prior art has problems such as excessive noise and friction due to the structural and mechanical characteristics of the device, and the device has a high spring force even after the user jumps off the device's footboard, causing the entire device, including the fixed plate, to shake. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Korean Patent Publication No. 10-2006-0003127 [Patent Document 2] Korean Patent Publication No. 10-2013-0043421 [Patent Document 3] Korean Patent No. 10-1180510 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention is made to solve the problems of the prior art, and has an object to provide a jumping exercise device that allows the elasticity of the leaf spring to be adjusted and uses a spring reserve complementing part to complement the spring reserve generated by the user's jumping exercise. Another object of the present invention is to provide a jumping exercise machine that is easy and safe for a user to use and that minimizes noise and friction. At the same time, the present invention aims to use a polymeric plastic material for the elastic support part, thereby improving properties such as strength, impact resistance, abrasion resistance, hardness, durability, ozone resistance, and corrosion resistance, thereby ensuring stable use of the jumping exercise equipment for a long period of time. [Means for solving the problem]

[0010] In order to achieve the above object, the present invention provides a jumping exercise device comprising a fixed plate 100 forming a base thereof; A step 200 that moves up and down on the upper part of the fixed plate 100 and on which the user steps: a step-plate connecting movable part 300, one side of which is rotatably connected to the fixed plate 100 and the other side of which is rotatably connected to the step plate 200, and which keeps the step plate 200 horizontal; An elastic part 400 including a leaf spring 410 provided on the fixed plate 100 and providing an elastic force to the step plate connecting movable part 300 in response to a change in the angle between the step plate connecting movable part 300 and the fixed plate 100; and The spring pressing part 500 is connected to the stepping board connecting movable part 300 and contacts one end of the leaf spring 410 to serve as a point of application. The step board 200 includes a step board elastic part 220 that is provided between the step board 200 and the step board connecting movable part 300 and has elasticity. The step plate elastic part 220 includes a coil spring made of carbon steel, one side of which is connected to the step plate connecting movable part 300; and an elastic support part made of polymer plastic material, which is connected to an end of the coil spring and contacts a part of the step plate 200. The elastic part 400 further includes a leaf spring support part 420 provided under the leaf spring 410 and movable in the longitudinal direction of the leaf spring 410; an elastic force supplement part 430 provided on the leaf spring support part 420, contacting a part of the leaf spring 410 to serve as a reference point, and adjusting the elastic force provided by the leaf spring 410 to the platform connecting movable part 300 and supplementing the elastic force including an elastic member; and an elasticity adjustment part 440 connected to the leaf spring support part 420 and adjusting the position of the leaf spring support part 420. The elastic reserve force complement part 430 includes a coil spring 431 made of carbon steel, one side of which is connected to the leaf spring support part 420, and an elastic support part 432 made of polymer plastic material, which is connected to an end of the coil spring 431, contacts a part of the leaf spring 410, and has a disk-shaped upper surface.

[0011] In one embodiment of the present invention, the elastic support part made of a polymer plastic material of the tread elastic part 220 and the elastic support part made of a polymer plastic material of the elastic force complement part 430 are characterized by being made of a composition including thermoplastic resin; thermoplastic rubber; glass fiber; lubricant; acrylic emulsion; copolymer of an acrylate group-containing silane coupling agent and 2-hydroxyethyl acrylate (HEA); and copolymer of an acrylate group-containing silane coupling agent, an acrylic acid monomer, and 2-hydroxyethyl acrylate (HEA).

[0012] In an embodiment of the present invention, the step plate connecting movable part 300 is characterized by including a main link arm 310 that connects the fixed plate 100 and the step plate 200, and an auxiliary link arm that connects the fixed plate 100 and the step plate 200 below the main link arm 310 so as to be horizontal to the main link arm 310.

[0013] In one embodiment of the present invention, the elastic part 400 is connected to the leaf spring support part 420 and is externally observable, and therefore includes a reference point position confirmation part 450 that allows the position of the leaf spring support part 420 to be confirmed.

[0014] In one embodiment of the present invention, the elastic part 400 includes a leaf spring locking device 460 formed at the other end of the leaf spring 410 opposite to the contact point with which the leaf spring pressing part 500 contacts, and fixes the leaf spring 410. In one embodiment of the present invention, the leaf spring pressing part 500 includes an action part 510 that contacts one end of the leaf spring 410 and serves as a point of application; and a reference angle adjusting part 520 that connects the step board connecting movable part 300 and the action part 510 and adjusts the initial angle that the step board connecting movable part 300 makes with the fixed plate 100. The action part 510 is characterized by being composed of a housing 511 located at the outermost position and in contact with the leaf spring 410, an outer ring 512 formed inside the housing 511, a bearing 513 formed inside the outer ring 512, an inner ring 514 formed inside the bearing 513, a tube 515 formed inside the inner ring 514, and an action shaft 516 formed as a rotation axis inside the tube 515.

[0015] In one embodiment of the present invention, the reference angle adjustment unit 520 is characterized by including an angle adjustment shaft 521 which is a rotation shaft, an angle adjustment handle 522 for rotating the angle adjustment shaft 521, a shaft coupling part 523 which is coupled to a selected part of the angle adjustment shaft 521, a bolt-shaped angle adjustment unit end 524 which is coupled to a lower end of the angle adjustment shaft 521, and a ball bearing 525 which is coupled to the lower part of the angle adjustment unit end 524.

[0016] In one embodiment of the present invention, the leaf spring 410 is configured in a tapered jeans shape with one side having a different thickness from the other side. Effect of the Invention

[0017] The present invention provides a jumping exercise device that can supplement the excess spring force generated by the user's jumping exercise by providing an elastic excess spring force complementing portion at the bottom of the leaf spring.

[0018] In addition, the present invention can minimize noise and impacts generated during jumping exercise, and by providing a fixing lever that can stop the rotation of the rotatable stepping board, it is possible to selectively provide a desired exercise between jumping exercise and hip rotation exercise.

[0019] In addition, the present invention is provided with a stepping elastic portion, which can primarily cushion the impact generated during jumping exercise, thereby reducing the impact given to the user.

[0020] In addition, the present invention uses a polymeric plastic material as the material for the elastic support part, thereby improving properties such as impact resistance, abrasion resistance, hardness, durability, ozone resistance, and corrosion resistance, thereby allowing the jumping exercise equipment to be used stably for a long period of time.

[0021] In addition, the present invention has the effect of ensuring stability of movement by always keeping the angle that the main link arm and auxiliary link arm make with the footboard constant, and by separately installing the coil spring and elastic support part, it has the effect of reducing the excess spring force generated in the leaf spring while making it easier to move the part corresponding to the point of action of the leaf spring.

[0022] In addition, by providing a reference point position confirmation unit, it is possible to intuitively confirm the position of the part of the leaf spring that corresponds to the point of action, and by separately installing the action unit and the reference angle adjustment unit and forming the part that corresponds to the point of action with a rolling bearing, it is possible to increase the durability of the leaf spring.

[0023] In addition, the present invention has an effect of supporting a person to safely stand on the step board for jumping exercise by providing a pillar on which the step board is formed. [Brief description of the drawings]

[0024] [Figure 1] 1 is a perspective view of a jumping exercise apparatus according to an embodiment of the present invention; [Diagram 2] Side view of Figure 1. [Diagram 3] Inside view of Figure 2. [Figure 4] An enlarged view of part A in Figure 3. [Diagram 5] An enlarged view of part B in Figure 3. [Figure 6] An enlarged view of part C in Figure 3. [Figure 7] 1 shows an example of an action portion of the present invention. [Figure 8] 4 shows an embodiment of a reference angle adjustment unit of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] The present invention will be described in detail with reference to the following examples. The terms and examples used in the present invention are merely illustrative for explaining the present invention in more detail and for facilitating understanding by those skilled in the art, and are not to be construed as limiting the scope of the present invention. Unless otherwise defined, technical and scientific terms used herein have the meaning commonly understood by one of ordinary skill in the art to which this invention belongs.

[0026] FIG. 1 is an oblique view of a jumping exercise apparatus according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is an internal view of FIG. 2, FIG. 4 is an enlarged view of part A of FIG. 3, FIG. 5 is an enlarged view of part B of FIG. 3, FIG. 6 is an enlarged view of part C of FIG. 3, FIG. 7 is an embodiment of the operating part, and FIG. 8 is an embodiment of the reference angle adjustment part.

[0027] The jumping exerciser according to an embodiment of the present invention is an exerciser that a user can ride on and jump on, does not take up space, minimizes noise and impacts generated during exercise, and can be used indoors.

[0028] As shown in Figures 1 to 3, the jumping exercise equipment according to an embodiment of the present invention includes a fixed plate 100, a stepping board 200, a stepping board connecting movable part 300, an elastic part 400 and a leaf spring pressing part 500, and the elastic part 400 includes a leaf spring 410, a leaf spring supporting part 420, a spring reserve complement part 430 and an elasticity adjusting part 440.

[0029] The fixed plate 100 forms the base of the jumping exerciser. The fixed plate 100 is the part where the jumping exerciser according to an embodiment of the present invention touches the ground and serves as a base for supporting the jumping exerciser according to an embodiment of the present invention.

[0030] Here, the term "plate" is used for the fixed plate 100, but this is not intended to limit the fixed plate 100 to a plate shape, and it is of course possible for the fixed plate 100 to be embodied in various shapes as it is the basic part of the jumping exercise equipment according to one embodiment of the present invention.

[0031] The step plate 200 moves up and down above the fixed plate 100 and is the part on which the user steps. That is, the step board 200 serves as a platform for the user to stand on and perform jumping exercise. Therefore, the step board 200 can move up and down. One side of the step board connecting movable part 300 is rotatably connected to the fixed plate 100, and the other side is rotatably connected to the step board 200, thereby maintaining the step board 200 horizontally.

[0032] That is, the step board connecting movable part 300 reciprocates (rotates within a certain angle range) around the point where it is connected to the fixed plate 100, and the step board 200 connected to the step board connecting movable part 300 moves up and down according to the angle that the step board connecting movable part 300 makes with the fixed plate 100. Here, the up and down movement does not mean a precise vertical movement, but can be a reciprocating movement along an arc.

[0033] At this time, one side of the step board connecting movable part 300 is rotatably and axially fixed to the fixed plate 100, and the other side of the step board connecting movable part 300 is rotatably and axially fixed to the step board 200. Here, the axial fixing may be performed by a hinge connection.

[0034] The elastic part 400 is provided on the fixed plate 100, and serves to transmit an elastic force to the step board connecting movable part 300. The elastic part 400 is installed on the fixed plate 100 so that the fixed plate 100 is used as the reference. The leaf spring 410 provides an elastic force to the step board connecting movable part 300 in response to a change in the angle that the step board connecting movable part 300 makes with the fixed plate 100 . The leaf spring 410 has one side fixed, and the fixed part corresponds to the force point. The leaf spring support 420 is provided on the lower part of the leaf spring 410 and is movable in the longitudinal direction of the leaf spring 410 .

[0035] The elastic force supplement part 430 is provided on the leaf spring support part 420 and contacts a part of the leaf spring 410 to act as a reference point and adjust the elastic force provided by the leaf spring 410 to the step plate connecting movable part 300 .

[0036] In other words, by moving the leaf spring support part 420, the position where the elastic force supplement part 430 contacts the leaf spring 410 can be changed, and this allows the elastic force of the part corresponding to the action point to be adjusted by changing the position corresponding to the reference point of the leaf spring 410. At this time, the elastic force supplementing part 430 supplements the elastic force including the elastic member. The elasticity adjusting part 440 is connected to the leaf spring support part 420 and adjusts the position of the leaf spring support part 420 .

[0037] That is, the elasticity adjusting part 440 moves the position of the leaf spring support part 420 to adjust the part where the elastic force supplement part 430 contacts the leaf spring 410 (the position corresponding to the reference point).

[0038] At this time, the part where the handles necessary for operating the elasticity adjustment part 440 are located can display (strong, weak, etc.) how to operate (in which direction to rotate, etc.) to adjust the elasticity.

[0039] As shown in Figs. 3, 4, 7 and 8, a leaf spring pressing part 500 is connected to the step board connecting movable part 300 and contacts one end of the leaf spring 400 to serve as a point of application. That is, the leaf spring pressing part 500 serves as a point of action for transmitting elastic force to the step board connecting movable part 300 .

[0040] The leaf spring pressing part 500 may include an action part 510 that contacts one end of the leaf spring 410 and serves as a point of action; and a reference angle adjusting part 520 that connects the leaf spring connecting movable part 300 and the action part 510 and adjusts the initial angle that the leaf spring connecting movable part 300 makes with the fixed plate 100.

[0041] The action part 510 is composed of a housing 511 located at the outermost position and in contact with the leaf spring 410, an outer ring 512 formed inside the housing 511, a bearing 513 formed inside the outer ring 512, an inner ring formed inside the bearing 513, a tube 515 formed inside the inner ring 514, and an action shaft 516 formed as a rotation axis inside the tube 515.

[0042] That is, as shown in FIG. 7, when the lever action is instantly released at the maximum point of the lever compression due to the characteristics of the device, compression and release occur simultaneously and instantly, and the rolling direction of the bearing must be instantly reversed due to the straightening action of the bent leaf spring 410.

[0043] However, with the existing structure, it is difficult to change the direction of the bearing instantly, and the applied load can cause the fastening structure to loosen, resulting in reduced durability and generating noise.

[0044] In the present invention, by using an operating part 510 consisting of a housing 511, an outer ring 512, a bearing 513, an inner ring 514, a tube 515 and an operating shaft 516, the bearing can be instantly turned, the loosening phenomenon of the fastening structure is prevented, durability is improved, and the problem of noise generation can be prevented.

[0045] In other words, by configuring it with a structure that combines an operating shaft, a cylindrical tube, an inner ring, a cylindrical bearing, and an outer ring, the drive direction can be freely changed even when the bearing changes direction instantly due to the action and reaction of the tool, and it can operate without friction or load.

[0046] In this case, the reference angle adjustment part 520 may include an angle adjustment shaft 521 which is a rotation shaft, an angle adjustment handle 522 for rotating the angle adjustment shaft 521, a shaft coupling part 523 which is coupled to a selected part of the angle adjustment shaft 521, a bolt-shaped angle adjustment part end 524 which is coupled to a lower end of the angle adjustment shaft 521, and a ball bearing 525 which is coupled to the lower part of the angle adjustment part end 524.

[0047] The angle adjustment shaft 521 rotates by rotating the angle adjustment handle 522, and the angle between the stepping board connecting movable part 300 and the elastic part 400 is adjusted. At this time, the shaft coupling part 523 fixes the swing of the angle adjustment shaft 521, so that the angle adjustment shaft 521 does not come off even when an impact occurs when using the equipment.

[0048] The ball bearing 525 disperses a vertical impact of the angle adjustment shaft 521, thereby dispersing the impact of the reference angle adjustment part 520, which was easily damaged when an impact was applied to a conventional device, and thereby improving durability.

[0049] As shown in FIG. 3, the stepping board 200 of the jumping exercise apparatus according to an embodiment of the present invention is characterized by being rotatable, and may further include a locking lever 210 for locking the stepping board 200 so that it does not rotate. A ball bearing may be installed under the footboard 200 for rotation of the footboard 200 (see FIG. 6).

[0050] This is to allow the user to select the desired exercise between jumping and hip rotation. Since the rotation of the step board 200 during jumping can be dangerous for the exerciser, it is preferable to provide a locking lever 210 that prevents the rotation of the step board 200 when performing a jumping exercise.

[0051] As shown in FIG. 3, the stepping board 200 of the jumping exercise apparatus according to an embodiment of the present invention may further include a stepping board elastic part 220 provided between the stepping board 200 and a stepping board connecting movable part 300 and having elasticity.

[0052] The stepping board elastic part 220 is provided under the stepping board 200 and serves to primarily cushion the impact generated during jumping, that is, to reduce the impact applied to the user's feet, thereby supporting a soft jumping motion (see FIG. 6).

[0053] The step plate elastic part 220 may include a coil spring connected at one side to the step plate connecting movable part 300 and an elastic support part connected to an end of the coil spring and in contact with a part of the step plate 200 . The coil spring may be made of a carbon steel material, and the elastic support part may be made of a polymer plastic material.

[0054] As shown in FIG. 3, the stepping board connecting movable part 300 of the jumping exercise apparatus according to one embodiment of the present invention may include a main link arm 310 connecting the fixed plate 100 and the stepping board 200, and an auxiliary link arm 320 connecting the fixed plate 100 and the stepping board 200 below the main link arm 210 so as to be horizontal to the main link arm 210.

[0055] In this case, it is preferable that the distance between the connecting shaft connected to the fixed plate 100 of the main link arm 310 and the connecting shaft connected to the footboard 200 is the same as the distance between the connecting shaft connected to the fixed plate 100 of the auxiliary link arm 320 and the connecting shaft connected to the footboard 200.

[0056] This is because, if the extension line of the connecting shaft connected to the fixed plate 100 of the main link arm 310 and the connecting shaft connected to the fixed plate 100 of the auxiliary link arm 320 is parallel to the extension line of the connecting shaft connected to the footboard 200 of the main link arm 310 and the connecting shaft connected to the footboard 200 of the auxiliary link arm 320, the angle between the footboard and the ground is always maintained constant (refer to a parallelogram).

[0057] As shown in Figures 3 and 5, the elastic reserve force supplement part 430 of the jumping exercise device according to one embodiment of the present invention may include a coil spring 431 connected at one side to the leaf spring support part 420, and an elastic support part 432 connected to an end of the coil spring 431 and in contact with a portion of the leaf spring 410 to serve as a reference point.

[0058] In order to complement (reduce) the excess spring force generated in the leaf spring 410, the elastic force complementing part 430 must also transmit an elastic force to the part in contact with the leaf spring 410, and must also reduce the frictional force of the part in contact with the leaf spring 410 in order to move the part in contact with the leaf spring 410. For this, the coil spring 431 may be made of a carbon steel material, and the elastic supporting part 432 may be made of a polymer plastic material.

[0059] In addition, as shown in FIG. 5, the elastic part 400 may be configured to include a leaf spring locking device 460 formed at the other end of the leaf spring 410 opposite the contact point with which the leaf spring pressing part 500 contacts, and for fixing the leaf spring 410.

[0060] By firmly fixing the leaf spring 410 to the elastic part 400 through the leaf spring locking device 460, loosening of the leaf spring 410 caused by shock or vibration caused during use of the device can be prevented, durability can be improved by firmly fixing the leaf spring 410, and injury to a user that may occur when the fixing of the leaf spring 410 is released can be prevented in advance. In this case, the leaf spring locking device 460 can be composed of a bolt and a nut.

[0061] The elastic support part made of a polymer plastic material of the tread elastic part 220 and the elastic support part made of a polymer plastic material of the elastic force complement part 430 may be made of a composition including a thermoplastic resin, a thermoplastic rubber, a glass fiber, a lubricant, an acrylic emulsion, a copolymer of an acrylate group-containing silane coupling agent and 2-hydroxyethyl acrylate (HEA), and a copolymer of an acrylate group-containing silane coupling agent, an acrylic acid monomer and 2-hydroxyethyl acrylate (HEA).

[0062] The elastic support part is made of a polymeric plastic material, which improves properties such as strength, impact resistance, abrasion resistance, hardness, durability, ozone resistance, and corrosion resistance, thereby allowing the jumping exercise equipment to be used stably for a long period of time.

[0063] The composition may contain, relative to 100 parts by weight of thermoplastic resin, 10 to 20 parts by weight of thermoplastic rubber, 1 to 10 parts by weight of glass fiber, 1 to 10 parts by weight of lubricant, 1 to 10 parts by weight of acrylic emulsion, 1 to 10 parts by weight of a copolymer of an acrylate group-containing silane coupling agent and 2-hydroxyethyl acrylate (HEA), and 1 to 10 parts by weight of a copolymer of an acrylate group-containing silane coupling agent, an acrylic acid monomer, and 2-hydroxyethyl acrylate (HEA).

[0064] As the thermoplastic resin, polyolefin, polyester, nylon, polyvinyl chloride, polyurethane, acrylic resin, ABS (acrylonitrile-butadiene-styrene copolymer), polycarbonate, acetal resin, etc. can be used without any limitation.

[0065] The thermoplastic rubber is used to impart elasticity, weather resistance, and ozone resistance, and may be, without limitation, a styrene-based thermoplastic rubber, an olefin-based thermoplastic rubber, a urethane-based thermoplastic rubber, an amide-based thermoplastic rubber, an ester-based thermoplastic rubber, or the like.

[0066] In particular, it is preferable to use olefin-based thermoplastic rubbers in which olefin-based resins such as polyethylene, polypropylene, and polystyrene are dynamically crosslinked or mixed with rubbers such as EPDM (ethylene-propylene-diene rubber), natural rubber, and SBR (styrene-butadiene rubber).

[0067] The thermoplastic rubber is preferably used in an amount of 10 to 20 parts by weight per 100 parts by weight of the thermoplastic resin. If the content of the thermoplastic rubber is less than 10 parts by weight, the effect of adding the thermoplastic rubber is negligible, and if it exceeds 20 parts by weight, the strength and heat resistance of the elastic support part are reduced.

[0068] The glass fiber is used to impart strength and heat resistance, and is preferably used in an amount of 1 to 10 parts by weight per 100 parts by weight of the thermoplastic resin. If the content of the glass fiber is less than 1 part by weight, the effect of the addition is insignificant, and if it exceeds 10 parts by weight, the interfacial properties, strength and heat resistance of the elastic supporting part are deteriorated.

[0069] The lubricant serves to improve wear resistance, and may be paraffinic oil, naphthenic oil, animal and vegetable oil, synthetic oil, grease, graphite, or the like.

[0070] The content of the lubricant is preferably 1 to 10 parts by weight based on 100 parts by weight of the thermoplastic resin. If the content is less than 1 part by weight, the effect of the addition is insignificant, and if the content exceeds 10 parts by weight, the mechanical and thermal properties of the manufactured elastic support part are deteriorated.

[0071] The acrylic emulsion is used to impart adhesiveness and elasticity, and examples of the acrylic resins used include polymethyl methacrylate, polyethyl methacrylate, polymethyl acrylate, polyethyl acrylate, and acrylic copolymers.

[0072] The content of the acrylic emulsion is preferably 1 to 10 parts by weight based on 100 parts by weight of the thermoplastic resin. If the content is less than 1 part by weight, the adhesiveness and elasticity are not sufficiently exhibited, and if the content exceeds 10 parts by weight, the strength is reduced.

[0073] The copolymer of the acrylate group-containing silane coupling agent and 2-hydroxyethyl acrylate (HEA) can improve the adhesion of the components in the composition, and can improve durability, flame retardancy, heat resistance, and the like.

[0074] Examples of the acrylate group-containing silane coupling agent include 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-acryloxypropyltrimethoxysilane, and methacryloxymethyltriethoxysilane.

[0075] The weight ratio of the acrylate group-containing silane coupling agent and 2-hydroxyethyl acrylate is preferably 20-40:60-80, and within this range, the durability, heat resistance, etc. of the composition can be maximized.

[0076] The content of the copolymer is preferably 1 to 10 parts by weight based on 100 parts by weight of the thermoplastic resin. If the content is less than 1 part by weight, the effect of the addition is insignificant, and if the content exceeds 10 parts by weight, the strength is reduced.

[0077] The copolymer of the acrylate group-containing silane coupling agent, acrylic acid monomer and 2-hydroxyethyl acrylate (HEA) can improve the adhesion of the components in the composition, and can improve durability, flame retardancy, heat resistance, etc.

[0078] The acrylic acid monomers include acrylic acid, methacrylic acid, methyl acrylic acid, ethyl acrylic acid, butyl acrylic acid, 2-ethylhexyl acrylic acid, decyl acrylic acid, methyl methacrylic acid, ethyl methacrylic acid, butyl methacrylic acid, 2-ethylhexyl methacrylic acid, decyl methacrylic acid, and the like.

[0079] The weight ratio of the acrylate group-containing silane coupling agent, the acrylic acid monomer, and the 2-hydroxyethyl acrylate is preferably 2-10:100:20-50, and within this range, the durability, heat resistance, etc. of the composition can be maximized.

[0080] The content of the copolymer is preferably 1 to 10 parts by weight based on 100 parts by weight of the thermoplastic resin. If the content is less than 1 part by weight, the effect of the addition is insignificant, and if the content exceeds 10 parts by weight, the strength is reduced.

[0081] The composition may further include an epoxy compound prepared by mixing bisphenol A (BPA), trimethylolpropane triglycidyl ether (TMPTGE), 1,6-hexanediol diglycidyl ether (HDGE), and butyl glycidyl ether (BGE).

[0082] In this case, the mixture may contain 5 to 30 parts by weight of trimethylolpropane triglycidyl ether, 5 to 20 parts by weight of 1,6-hexanediol diglycidyl ether, and 5 to 20 parts by weight of butyl glycidyl ether, relative to 100 parts by weight of bisphenol A.

[0083] The content of the epoxy compound is preferably 1 to 10 parts by weight based on 100 parts by weight of the thermoplastic resin. If the content is less than 1 part by weight, the effect of the addition is negligible, and if the content exceeds 10 parts by weight, the strength is reduced.

[0084] As shown in FIG. 1, the elastic part 400 of the jumping exercise device according to the embodiment of the present invention is connected to the leaf spring support part 420 and can be observed from the outside. The elastic part 400 can include a reference point position confirmation part 450 that can confirm the position of the leaf spring support part 420.

[0085] The reference point position confirmation unit 450 is necessary for adjusting the intensity of the jumping exercise, and allows one to confirm the current elastic force set in the jumping exercise apparatus according to one embodiment of the present invention. It is preferable that the current position of the elastic reserve complement unit 430 can be confirmed so that this can be intuitively confirmed.

[0086] To this end, a protrusion is formed on the side of the leaf spring support portion 420 corresponding to the position of the elastic reserve force complement portion 430, and the protrusion protrudes outward to form a movable guide groove, and the protrusion protrudes out of the guide groove, so that the position of the protrusion can be confirmed to confirm the position of the elastic reserve force complement portion 430 (see FIG. 1).

[0087] As shown in FIG. 3, the leaf spring pressing unit 500 of the jumping exercise apparatus according to one embodiment of the present invention may include an action unit 510 that contacts one end of the leaf spring 410 and serves as a point of action, and a reference angle adjusting unit 520 that connects the stepping board connecting movable unit 300 and the action unit 510 and adjusts the initial angle that the stepping board connecting movable unit 300 makes with the fixed plate 100.

[0088] The reference angle adjusting unit 520 is for adjusting the angle between the part corresponding to the action point of the action unit 510 and the step board connecting movable part 300, centering on the part where the step board connecting movable part 300 is connected to the fixed plate. For example, it may be configured so that the angle between the plate serving as the reference for the action part 510 and the step board connecting movable part 300 can be adjusted by turning a handle.

[0089] For this purpose, various mechanical connecting members such as various bolts, nuts, connecting shafts, fixing pins, bearings, etc. may be used. The leaf spring 410 may be formed to have the same thickness or to have a shape in which the thickness becomes thinner from one side to the other side.

[0090] The exercise machine of the present invention is configured to utilize the elasticity of the leaf spring as the main elasticity, and the coil spring as a buffer member. In this case, the elastic force of the leaf spring is determined by the cross-sectional area, and the elastic force of the coil spring is determined by the material and structure. Therefore, the exercise machine can be configured to exert elastic force by reinforcing or relaxing these two forces, and to adjust the elastic response speed.

[0091] The leaf spring 410 is formed in a tapered jeans shape, that is, in a shape in which the thickness becomes thinner from one side to the other side, so that the elastic strength and flexibility can be adjusted to provide optimal elasticity.

[0092] As shown in FIG. 1, the jumping exercise apparatus according to one embodiment of the present invention may include a pillar 600 connected to the fixed plate 100 in the vertical upper direction of the fixed plate 100, and a platform 700 connected to the pillar 600 and capable of moving and being fixed along the pillar 600.

[0093] The pillars 600 are for a person to hold on to and safely jump, and the platform 700 serves as an auxiliary stepping board that supports the person to safely stand on the stepping board 200 for jumping.

[0094] In addition, the jumping exercise device of the present invention may further include an elastic mat and suction rubber feet attached to the lower end of the fixed plate 100, although not shown.

[0095] The exercise equipment generates interfloor noise due to impact from weight and shaking of the equipment, which can be a cause of disputes. In the case of the jumping exercise equipment of the present invention, interfloor noise due to impact is prevented by providing a buffer between the floor and the equipment through an elastic mat, and interfloor noise that may be generated due to shaking can be prevented by fixing the equipment to the floor through suction rubber feet. Therefore, even when exercising using the equipment, no interfloor noise is generated, and disputes can be prevented in advance.

[0096] In addition, a bolt mounting hole for mounting a wheel for transportation is formed at the lower end of the fixed plate 100, and the wheels are usually detached to use the device, and when transportation is required for moving or changing the location, the wheels can be mounted by connecting the bolt of the wheel to the bolt mounting hole, making transportation more convenient.

[0097] The present invention will be described in detail with reference to the following examples and comparative examples. The following examples are merely illustrative for carrying out the present invention, and the content of the present invention is not limited to the following examples. Example 1

[0098] A polyurethane composition was produced by mixing 100 parts by weight of polyurethane, 15 parts by weight of thermoplastic rubber blended with 70 parts by weight of polyethylene and 30 parts by weight of styrene-butadiene rubber, 5 parts by weight of glass fiber, 5 parts by weight of paraffin oil, 5 parts by weight of polymethyl methacrylate emulsion, 5 parts by weight of a copolymer of 3-methacryloxypropyltrimethoxysilane and 2-hydroxyethyl acrylate (HEA), and 5 parts by weight of a copolymer of 3-methacryloxypropyltrimethoxysilane, acrylic acid, and 2-hydroxyethyl acrylate (HEA). The mixture was then extruded to produce a polyurethane composition. Example 2

[0099] A polyurethane composition was prepared in the same manner as in Example 1, except that 5 parts by weight of an epoxy compound prepared by mixing bisphenol A (BPA), trimethylolpropane triglycidyl ether (TMPTGE), 1,6-hexanediol diglycidyl ether (HDGE) and butyl glycidyl ether (BGE) was further used. Comparative Example 1

[0100] A polyurethane composition was prepared in the same manner as in Example 1, except that the copolymer of 3-methacryloxypropyltrimethoxysilane and 2-hydroxyethyl acrylate (HEA) was not used. Comparative Example 2

[0101] A polyurethane composition was prepared in the same manner as in Example 1, except that no polymethyl methacrylate emulsion was used. The tensile strength, heat resistance, friction coefficient and acid resistance of the polyurethane compositions prepared in the above examples and comparative examples were measured, and the results are shown in Table 1 below.

[0102] The tensile strength was measured according to ASTM D 638, and the heat resistance was measured by heating the composition for 3 hours in a hot air circulating oven maintained at 100°C, and then observing the yellowing of the composition with the naked eye and rating it as excellent, good, average, or poor. The coefficient of friction was calculated by measuring the normal load and the tangential friction force generated during rotation at room temperature using a roller-and-disk testing machine. The acid resistance was evaluated by immersing the composition in 10% by weight sulfuric acid at room temperature for 5 days, and then observing the state of the composition and rating it as excellent, good, fair, or poor.

[0103] [Table 1]

[0104] From the results in Table 1, it can be seen that Examples 1 and 2 are excellent in tensile strength, heat resistance, abrasion resistance and acid resistance. On the other hand, it is seen that Comparative Examples 1 and 2 are inferior to the Examples in the above characteristics. [Explanation of symbols]

[0105] 100: Fixed plate 200:Treadboard 210: Fixed lever 220: Elastic part of tread 300: Tread plate connection movable part 310: Main link arm 320: Auxiliary link arm 400: Elastic part 410: Leaf spring 420: Leaf spring support 430: Spring reserve force supplement section 431: Coil spring 432: Elastic support part 440: Elastic adjustment part 450: Reference point position confirmation section 460: Leaf spring locking device 500: Leaf spring pressing part 510: Action part 511: Housing 512: Outer ring 513: Bearings 514: Insider 515: Tube 516:Axis of action 520: Reference angle adjustment section 521: Angle adjustment axis 522: Angle adjustment handle 523: Shaft joint 524:Angle adjustment part end 525: Ball bearings 600: Pillar 700:Treadboard

Claims

[Claim 1] A fixed plate 100 forming the base of the jumping exercise apparatus; A step 200 that moves up and down above the fixed plate 100 and on which the user steps; a step-plate connecting movable part 300, one side of which is rotatably connected to the fixed plate 100 and the other side of which is rotatably connected to the step plate 200, for maintaining the step plate 200 horizontal; An elastic part 400 including a leaf spring 410 provided on the fixed plate 100 and providing an elastic force to the step board connecting movable part 300 in response to a change in an angle between the step board connecting movable part 300 and the fixed plate 100; and The jumping exercise machine includes a leaf spring pressing part 500 connected to the stepping board connecting movable part 300 and contacting one end of the leaf spring 410 to serve as a point of application, The step 200 is The stepping board elastic part 220 is provided between the stepping board 200 and the stepping board connecting movable part 300 and has elasticity. The tread elastic portion 220 is A coil spring made of carbon steel, one side of which is connected to the step connecting movable part 300; The elastic support part is connected to an end of the coil spring and is made of a polymer plastic material and is in contact with a part of the footboard 200. The elastic portion 400 is a leaf spring support part 420 provided at a lower part of the leaf spring 410 and movable in a longitudinal direction of the leaf spring 410; a spring reserve complementing part 430 which is provided on the leaf spring support part 420, contacts a part of the leaf spring 410 to serve as a reference point, adjusts the elastic force provided by the leaf spring 410 to the step connecting movable part 300, and includes an elastic member to complement the spring reserve; an elastic adjustment part 440 connected to the leaf spring support part 420 and adjusting the position of the leaf spring support part 420; a reference point position confirmation unit 450 connected to the leaf spring support unit 420 and externally observable, thereby enabling confirmation of the position of the leaf spring support unit 420; and The plate spring locking device 460 is formed at the other end of the plate spring 410 opposite to the contact point where the plate spring pressing part 500 contacts, and fixes the plate spring 410. The elastic force supplement unit 430 is a coil spring 431 made of carbon steel, one side of which is connected to the leaf spring support 420; and an elastic support 432 made of polymer plastic material and having a disk-shaped upper surface, which is connected to an end of the coil spring 431 and contacts a part of the leaf spring 410. The leaf spring pressing portion 500 is an action part 510 which contacts one end of the leaf spring 410 and serves as a point of action; and a reference angle adjustment part 520 which connects the step board connecting movable part 300 and the action part 510 and adjusts an initial angle between the step board connecting movable part 300 and the fixed plate 100, The action portion 510 is The spring 510 is made up of a housing 511 located at the outermost position and in contact with the leaf spring 410, an outer ring 512 formed inside the housing 511, a bearing 513 formed inside the outer ring 512, an inner ring 514 formed inside the bearing 513, a tube 515 formed inside the inner ring 514, and an operating shaft 516 formed as a rotation axis inside the tube 515. By using the operating part 510 consisting of the housing 511, the outer ring 512, the bearing 513, the inner ring 514, the tube 515 and the operating shaft 516, the bearing can be instantly turned, the loosening phenomenon of the fastening structure is prevented, durability is improved, and the problem of noise generation is prevented. The reference angle adjusting unit 520 is The angle adjustment shaft 521 is a rotation shaft, an angle adjustment handle 522 for rotating the angle adjustment shaft 521, a shaft coupling part 523 coupled to a selected part of the angle adjustment shaft 521, a bolt-shaped angle adjustment part end 524 coupled to a lower end of the angle adjustment shaft 521, and a ball bearing 525 coupled to a lower part of the angle adjustment part end 524. The angle adjustment shaft 521 rotates by rotating the angle adjustment handle 522, and the angle between the step connecting movable part 300 and the elastic part 400 is adjusted. The shaft coupling portion 523 is The angle adjustment shaft 521 is fixed so that it does not come off even when subjected to shocks generated during use of the device. The ball bearing 525 disperses impacts in the vertical direction of the angle adjustment shaft 521 to improve the durability of the reference angle adjustment part 520. A jumping exercise apparatus characterized by the above.

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