Jumping apparatus

Abstract

The present invention relates to a jumping exercise device, and more particularly, to a jumping exercise device capable of adjusting the elasticity of a leaf spring and compensating for the bounce surplus generated by a user's jumping exercise using a coil spring. The present invention provides a jumping exercise device capable of compensating for the bounce surplus generated by a user's jumping exercise by providing a bounce surplus compensating portion having elasticity at the lower portion of the leaf spring. In addition, the present invention can minimize the noise and impact generated during the jumping exercise, and is provided with a fixing rod that can prevent the rotatable footrest from rotating, thereby selectively providing the desired exercise between the jumping exercise and the waist rotation exercise. Meanwhile, the present invention can also reduce the main impact generated during the jumping exercise by providing a footrest elastic portion, thereby reducing the impact received by the user.

Description

Technical Field

[0001] This invention relates to a jumping motion device, and more specifically, to a jumping motion device capable of adjusting the elasticity of a leaf spring and compensating for the residual force generated during a user's jumping motion using a residual force compensation unit. Background Technology

[0002] Generally speaking, jumping sports equipment such as trampolines are operated by suspending multiple coil springs on a steel frame. Therefore, they occupy a large area and have the disadvantage that the elasticity cannot be adjusted except by disassembling the coil springs.

[0003] In addition, trampolines are made of fabric, making it difficult for users to keep parallel; and due to the nature of trampolines, it is difficult to install handles, posing a risk of injury to users during use; there is also the problem of severe friction noise due to the operation of multiple coil springs.

[0004] To address this issue, Korean Public Patent No. 10-2006-0003127 discloses a jumping exercise device, which includes: a body 12, with a built-in ignition device operated by the jumping device and a spring that acts as a buffer; and an upper jumping board 14 and a lower jumping board 16, which transmit pressure using the user's body weight to operate the jumping device and are connected to the body 12.

[0005] Korean Patent Publication No. 10-2013-0043421 discloses a jumping and rotating exercise device with the following features: a lifting shaft 20 inserted into a support tube 11 vertically installed in the center of a base 10 is supported and raised by a first bearing 11b and a first spring 11a; a bracket 21 fixed to the upper part of the lifting shaft 20 is elastically supported and raised by a second spring 22a; a rotating shaft 30 is obliquely installed on a boss 22 of the bracket 21 and supported by a second bearing 22b; and an oblique foot pedal 31 is installed on the upper part of the rotating shaft 30, allowing the foot pedal 31 to rotate and rise.

[0006] Meanwhile, Korean Patent No. 10-1180510 discloses a jumping exercise device for enhancing lower limb joint and muscle strength, featuring the following characteristics. This jumping exercise device includes a base plate 10 with handles 11, a footplate portion 30 with one end fixed to the base plate 10, and an elastic member 50 providing elastic force to the footplate portion 30. The footplate portion 30 is composed of a connecting member 310 with one end fixed to the base plate 10 and a footplate 330 with an axis fixed to the other end of the connecting member 310 for left-right rotation. The jumping exercise device is equipped with a rotation angle measuring unit 70 for measuring the left-right rotation angle of the footplate 330 and an acceleration measuring unit 90 for measuring the vertical acceleration of the footplate 330. It also includes a load sensor 40 located at the portion of the base plate 10 that collides with the lower part of the connecting member 310 of the footplate 30 when the user jumps, to measure the pressure on the footplate 30.

[0007] However, the prior art has many problems, including: noise and friction sounds are generated due to the structure and mechanical characteristics of the equipment; even after the user bounces off the footplate of the equipment, the remaining force of the bounce still causes the entire equipment, including the fixing plate, to shake.

[0008] Existing technical documents

[0009] Patent documents

[0010] Patent Document 0001: Korean Patent Publication No. 10-2006-0003127

[0011] Patent Document 0002: Korean Patent Publication No. 10-2013-0043421

[0012] Patent Document 0003: Korean Patent No. 10-1180510 Summary of the Invention

[0013] Technical issues

[0014] The present invention aims to solve the problems existing in the prior art. The purpose of the present invention is to provide a jumping exercise device that can adjust the elasticity of the leaf spring and use the bouncing force compensation part to compensate for the bouncing force generated by the user during jumping.

[0015] Furthermore, another object of the present invention is to provide a jumping exercise device that is easy and safe for users to use and has minimal noise and friction.

[0016] Meanwhile, another objective of this invention is to improve the strength, impact resistance, wear resistance, hardness, durability, ozone resistance, and corrosion resistance of jumping sports equipment by using an elastic support part made of polymer plastic material, thereby enabling long-term stable use of the equipment.

[0017] Technical solution

[0018] To achieve the aforementioned objective, the present invention provides a jumping exercise device, comprising a fixed plate 100 forming the base of the jumping exercise device; a footplate 200, which moves up and down on the upper part of the fixed plate 100 for the user to step on; a movable part 300 connecting the footplate, one side of which is rotatably connected to the fixed plate 100, and the other side of which is rotatably connected to the footplate 200 to keep the footplate 200 horizontal; and an elastic part 400 disposed on the fixed plate 100, including a leaf spring 410. 0. Based on the change in the angle formed between the footplate connecting movable part 300 and the fixed plate 100, a spring force is provided to the footplate connecting movable part 300; and a leaf spring pressing part 500, connected to the footplate connecting movable part 300, contacts one end of the leaf spring 410 as the point of action. The footplate 200 includes a footplate elastic part 220 disposed between the footplate 200 and the footplate connecting movable part 300 and having a spring force. The footplate elastic part 220 includes: a coil spring made of carbon steel, one... The footplate is connected to a movable part 300; and an elastic support part, made of polymer plastic, is connected to the end of the coil spring and contacts a portion of the footplate 200. The elastic part 400 further includes: a leaf spring support part 420, disposed at the lower part of the leaf spring 410 and movable in the longitudinal direction of the leaf spring 410; and a spring force compensation part 430, disposed at the leaf spring support part 420 and in contact with a portion of the leaf spring 410 as a reference point, adjusting the force provided by the leaf spring 410 to the footplate. The plate connects to the movable part 300, which has elastic force and includes an elastic member to compensate for the rebound force; and an elastic adjustment part 440, which is connected to the leaf spring support part 420 to adjust the position of the leaf spring support part 420. The rebound force compensation part 430 includes: a coil spring 431, made of carbon steel, connected to the leaf spring adjustment support part 420 on one side; and an elastic support part 432, made of polymer plastic, connected to the end of the coil spring 431 and in contact with a part of the leaf spring 410, with the upper surface being disc-shaped.

[0019] In one embodiment of the present invention, the elastic support portion of the footplate elastic portion 220 made of polymer plastic and the elastic support portion 432 of the bounce compensation portion 430 made of polymer plastic are made of a composition containing the following components: thermoplastic resin; thermoplastic rubber; glass fiber; lubricant; acrylic emulsion; copolymer of silane coupling agent containing acrylate groups and 2-hydroxyethyl acrylate (HEA); and copolymer of silane coupling agent containing acrylate groups, acrylic monomer and 2-hydroxyethyl acrylate (HEA).

[0020] In one embodiment of the present invention, the footplate connecting movable component 300 includes a main connecting arm 310 connecting the fixed plate 100 and the footplate 200; and an auxiliary connecting arm 320 connecting the fixed plate 100 and the footplate 200 so as to be parallel to the main connecting arm 310 in the lower direction.

[0021] In one embodiment of the present invention, the elastic part 400 includes a reference point position confirmation part 450 connected to the leaf spring support part 420 and whose position can be observed and confirmed from the outside.

[0022] In one embodiment of the present invention, the elastic portion 400 includes a leaf spring locking device 460 formed on the other end of the leaf spring 410 opposite to the contact point that contacts the leaf spring pressing portion 500 to fix the leaf spring 410. In one embodiment of the present invention, the leaf spring pressing portion 500 includes: an action portion 510 that contacts one end of the leaf spring 410 and serves as an action point; and a reference angle adjustment portion 520 that connects the footplate connecting movable member 300 and the action portion 510, and adjusts the initial angle formed between the footplate connecting movable member 300 and the fixed plate 100.

[0023] The actuating part 510 includes: a housing 511 located on the outermost side and in contact with the leaf spring 410; an outer wheel 512 formed inside the housing 511; a bearing 513 formed inside the outer wheel 512; an inner wheel 514 formed inside the bearing 513; a tube 515 formed inside the inner wheel 514; and an actuating shaft 516 formed inside the tube 515.

[0024] In one embodiment of the present invention, the reference angle adjustment part 520 includes: an angle adjustment shaft 521 serving as a rotation axis, an angle adjustment handle 522 for rotating the angle adjustment shaft 521, a shaft connection part 523 connected to a selected portion of the angle adjustment shaft 521, a bolt-type angle adjustment part end 524 connected to the lower end of the angle adjustment shaft 521, and a ball bearing 525 connected to the lower part of the angle adjustment part end 524.

[0025] In one embodiment of the invention, the leaf spring 410 is formed in a conical shape, with the thickness of one side being different from that of the other side.

[0026] The effects of the invention

[0027] The present invention provides a jumping exercise device having an elastic bouncing force compensation part located at the lower part of a leaf spring, so as to compensate for the bouncing force generated by the user's jumping movement.

[0028] Furthermore, the present invention can minimize the noise and impact generated during jumping movements and includes a fixed rod to stop the rotation of the rotatable footboard, thereby providing optional exercise programs in jumping and waist rotation movements.

[0029] In addition, the present invention also includes a footplate elastic portion, which can reduce the main impact that occurs during jumping, thereby reducing the impact on the user.

[0030] Furthermore, by using an elastic support part made of polymer plastic, this invention improves the strength, impact resistance, wear resistance, hardness, durability, ozone resistance, and corrosion resistance of jumping sports equipment, thereby enabling long-term stable use.

[0031] Furthermore, by keeping the angle between the main link arm and the auxiliary link arm and the footplate constant, the present invention ensures motion stability. By separately installing the helical spring and the elastic support, it reduces the bounce force generated in the leaf spring while making the point of action of the leaf spring easier to move.

[0032] Furthermore, by setting a reference point position confirmation part, the position of the leaf spring's action point can be visually confirmed. By installing the action part and the reference point position confirmation part separately, and having the action point formed by a rolling bearing, the durability of the leaf spring can be improved.

[0033] Furthermore, by installing a footboard on the support, the present invention helps users to safely stand on the footboard and perform jumping exercises. Attached Figure Description

[0034] Figure 1 This is a perspective view of a jumping exercise device according to an embodiment of the present invention.

[0035] Figure 2 yes Figure 1 Side view.

[0036] Figure 3 yes Figure 2 The internal view.

[0037] Figure 4 yes Figure 3 An enlarged view of part A.

[0038] Figure 5 yes Figure 3 An enlarged view of part B.

[0039] Figure 6 yes Figure 3 An enlarged view of part C.

[0040] Figure 7 This is an embodiment of the functional part of the present invention.

[0041] Figure 8 This is an embodiment of the reference angle adjustment part of the present invention. Detailed Implementation

[0042] The present invention will now be described in detail with reference to embodiments. The terminology, embodiments, etc., used in this invention are merely exemplary to explain the invention in more detail and to help those skilled in the art understand it, and the scope of the invention should not be construed as limited thereto.

[0043] Unless otherwise defined, the technical and scientific terms used in this invention have the meanings commonly understood by one of ordinary skill in the art to which this invention pertains.

[0044] Figure 1 This is a perspective view of a jumping exercise device according to an embodiment of the present invention. Figure 2 yes Figure 1 Side view, Figure 3 yes Figure 2 Internal view Figure 4 yes Figure 3 Enlarged view of part A Figure 5 yes Figure 3 Enlarged view of Part B Figure 6 yes Figure 3 Enlarged view of part C Figure 7 This is an embodiment of the active part. Figure 8 This is an embodiment of the reference angle adjustment unit.

[0045] According to an embodiment of the present invention, the jumping exercise equipment is a type of exercise equipment that allows users to stand and perform jumping exercises while taking up little space, minimizing noise and impact generated during exercise, and can also be used indoors.

[0046] like Figures 1 to 3 As shown, a jumping exercise device according to an embodiment of the present invention includes a fixed plate 100, a footboard 200, a footboard connecting movable part 300, an elastic part 400, and a leaf spring pressing part 500, wherein the elastic part 400 includes a leaf spring 410, a leaf spring support part 420, a jumping residual force compensation part 430, and an elastic adjustment part 440.

[0047] The fixed plate 100 constitutes the base of the jumping exercise device and is the part of the jumping exercise device that contacts the ground according to an embodiment of the present invention. It serves as a base to support the jumping exercise device according to an embodiment of the present invention.

[0048] Although the term "plate" is used in this specification for the fixing plate 100, this does not mean that the fixing plate 100 is limited to the shape of a plate. The fixing plate 100 is a component that forms the base of a jumping exercise device according to an embodiment of the present invention, and can of course be implemented in various shapes.

[0049] The footrest 200 moves up and down on the upper part of the fixed plate 100 and is the part that the user steps on.

[0050] That is, the footrest 200 is a platform for the user to stand and jump. For this purpose, the footrest 200 can move up and down.

[0051] One side of the footplate connecting movable part 300 is rotatably connected to the fixed plate 100, and the other side is rotatably connected to the footplate 200 to keep the footplate 200 horizontal.

[0052] That is, the movable part 300 of the footplate reciprocates (rotates within a certain angle range) around the connection point with the fixed plate 100, and the footplate 200 connected to the movable part 300 moves up and down according to the angle formed by the movable part 300 and the fixed plate 100. This up and down movement does not refer to precise vertical movement, but rather to reciprocating motion along an arc.

[0053] At this time, one side of the footplate connecting the movable part 300 is rotatably fixed to the fixed plate 100 by a pivot, and the other side of the footplate connecting the movable part 300 is rotatably fixed to the footplate 200 by a pivot. Here, a hinge can be used to complete the pivot fixing.

[0054] An elastic part 400 is disposed on the fixed plate 100. The elastic part 400 transmits elastic force to the foot plate connecting movable part 300. The elastic part 400 is mounted on the fixed plate 100 with the fixed plate 100 as a reference.

[0055] The leaf spring 410 provides elastic force to the footplate connecting movable part 300 according to the change of the angle formed between the footplate connecting movable part 300 and the fixed plate 100.

[0056] The leaf spring 410 is fixed on one side, and the fixed part is the stress point.

[0057] The leaf spring support 420 is disposed at the lower part of the leaf spring 410 and can move along the longitudinal direction of the leaf spring 410.

[0058] The spring force compensation part 430 is provided on the leaf spring support part 420. It serves as a reference point by contacting a part of the leaf spring 410 and adjusts the spring force provided by the leaf spring 410 to the footplate connecting movable part 300.

[0059] That is, if the leaf spring support 420 moves, the contact position between the spring force compensation part 430 and the leaf spring 410 can be changed. Thus, by changing the position of the reference point of the leaf spring 410, the elastic force at the point of action can be adjusted.

[0060] At this time, the bouncing force compensation unit 430 includes an elastic member to compensate for the bouncing force.

[0061] The elastic adjustment part 440 is connected to the leaf spring support part 420 to adjust the position of the leaf spring support part 420.

[0062] That is, the elastic adjustment part 440 moves the position of the leaf spring support part 420 and adjusts the part (position of the reference point) in contact with the leaf spring 410 by the bounce surplus force compensation part 430.

[0063] At this time, the part containing the handle or the like required to operate the elastic adjustment part 440 can be marked (strong, weak, etc.) to indicate how to operate (rotate in which direction, etc.) to control the elastic force.

[0064] like Figure 3 , Figure 4 , Figure 7 as well as Figure 8 As shown, the leaf spring pressing part 500 is connected to the foot plate connecting movable part 300 and contacts one end of the elastic part 400 to serve as the point of action.

[0065] That is, the leaf spring pressing part 500 acts as the point of application for transmitting elastic force to the footplate connecting movable part 300.

[0066] The leaf spring pressing part 500 includes: an action part 510 that contacts one end of the leaf spring 410 and serves as an action point; and a reference angle adjustment part 520 that connects the foot plate connecting movable part 300 and the action part 510 and adjusts the initial angle formed by the foot plate connecting movable part 300 and the fixed plate 100.

[0067] The actuating part 510 includes: a housing 511 located on the outermost side and in contact with the leaf spring 410; an outer wheel 512 formed inside the housing 511; a bearing 513 formed inside the outer wheel 512; an inner wheel 514 formed inside the bearing 513; a tube 515 formed inside the inner wheel 514; and an actuating shaft 516 formed inside the tube 515.

[0068] That is, such as Figure 7 As shown, due to the nature of the equipment, when the lever is released instantaneously at the maximum point of lever compression, compression and release occur simultaneously, and due to the straightening effect of the bent leaf spring 410, the rolling direction of the bearing should immediately change to the opposite direction.

[0069] However, in the existing structure, it is difficult to change the bearing direction instantly, and the fastening structure will loosen due to the applied load, which not only reduces durability but also causes noise problems.

[0070] The present invention uses an action part 510 consisting of a housing 511, an outer wheel 512, a bearing 513, an inner wheel 514, a tube 515 and an action shaft 516. The bearing can change direction instantly, preventing the fastening structure from loosening, improving durability and preventing noise problems.

[0071] That is, by using a structure consisting of a mixed-action shaft, cylindrical tube, inner wheel, cylindrical bearing and outer wheel, even if the bearing changes direction instantaneously due to the action and reaction of the equipment, the driving direction can be freely switched so that it operates without friction and load.

[0072] At this time, the reference angle adjustment unit 520 may include an angle adjustment shaft 521 as a rotation axis, an angle adjustment handle 522 for rotating the angle adjustment shaft 521, a shaft connection 523 connected to a selected portion of the angle adjustment shaft 521, a bolt-type angle adjustment unit end 524 connected to the lower end of the angle adjustment shaft 521, and a ball bearing 525 connected to the lower part of the angle adjustment unit end 524.

[0073] By rotating the angle adjustment handle 522, the angle adjustment shaft 521 is rotated, adjusting the angle formed between the footplate connecting movable part 300 and the elastic part 400. At this time, the shaft connecting part 523 can fix the wobbling of the angle adjustment shaft 521, and even under the impact generated when using the equipment, the angle adjustment shaft 521 will not deviate and will remain fixed.

[0074] The ball bearing 525 disperses the impact of the vertical direction of the angle adjustment shaft 521, thereby dispersing the impact of the reference angle adjustment part 520, which is easily damaged by impact in conventional equipment, and improving its durability.

[0075] like Figure 3 As shown, the footboard 200 of the jumping exercise equipment according to an embodiment of the present invention has a rotatable feature, and may also include a fixing rod 210 for fixing the footboard 200 to prevent rotation.

[0076] For the footplate 200 to rotate, a ball bearing can be installed on the lower part of the footplate 200 (see...). Figure 6 ).

[0077] The purpose is to selectively perform the desired movements during jumping and waist rotation. If the footplate 200 rotates during jumping, it may pose a danger to the user. Therefore, a fixing rod 210 is needed to prevent the footplate 200 from rotating during jumping.

[0078] like Figure 3As shown, according to an embodiment of the present invention, the footplate 200 of the jumping exercise equipment is disposed between the footplate 200 and the footplate connecting movable part 300, and may also include an elastic footplate elastic part 220.

[0079] The footplate elastic portion 220 is disposed at the lower part of the footplate 200 to reduce the main impact that occurs during jumping. That is, it reduces the impact on the user's feet. This helps to achieve a smooth jumping motion (see...). Figure 6 ).

[0080] The footplate elastic part 220 may include: a coil spring connected on one side to the footplate connecting movable part 300; and an elastic support part connected to the end of the coil spring and in contact with a part of the footplate 200.

[0081] The helical spring can be made of carbon steel, and the elastic support can be made of polymer plastic.

[0082] like Figure 3 As shown, the movable part 300 of the footboard connection of the jumping exercise equipment according to an embodiment of the present invention may include: a main connecting rod arm 310 connecting the fixed plate 100 and the footboard 300, and an auxiliary connecting rod arm 320 connecting the fixed plate 100 and the footboard 200 so as to be parallel to the main connecting rod arm 310 in the lower direction.

[0083] Preferably, the distance between the connecting shaft connected to the fixing plate 100 of the main connecting rod arm 310 and the connecting shaft connected to the foot plate 200 is the same as the distance between the connecting shaft connected to the fixing plate 100 of the auxiliary connecting rod arm 320 and the connecting shaft connected to the foot plate 200.

[0084] This is because, as long as the extension lines of the connecting shafts connected to the fixing plate 100 of the main connecting rod arm 310 and the connecting shafts connected to the fixing plate 100 of the auxiliary connecting rod arm 320 are parallel to the extension lines of the connecting shafts connected to the foot plate 200 of the main connecting rod arm 310 and the connecting shafts connected to the foot plate 200 of the auxiliary connecting rod arm 320, the angle between the foot plate 200 and the ground will always remain constant (refer to the shape of a parallelogram).

[0085] like Figure 3 as well as Figure 5 As shown, the bouncing force compensation part 430 of the jumping exercise equipment according to an embodiment of the present invention may include: a coil spring 431 connected on one side to the leaf spring support part 420; and an elastic support part 432 connected to the end of the coil spring 431 and in contact with a part of the leaf spring 410 to serve as a reference point.

[0086] The bounce force compensation unit 430 transmits the elastic force to the part in contact with the leaf spring 410 to compensate for (reduce) the bounce force generated by the leaf spring 410, and also reduces the friction of the part in contact with the leaf spring 410 to move the part in contact with the leaf spring 410.

[0087] Therefore, the helical spring 431 can be formed of carbon steel, and the elastic support portion 432 can be formed of polymer plastic.

[0088] like Figure 5 As shown, the elastic part 400 is formed on the end opposite to the contact point where the leaf spring 410 contacts the leaf spring pressing part 500 to fix the leaf spring (410) in a leaf spring locking device 460.

[0089] The leaf spring 410 is securely fixed to the elastic part 400 by the leaf spring locking device 460, preventing the leaf spring 410 from loosening due to impacts or shaking caused by using the equipment. This secure fixation improves the durability of the leaf spring 410 and prevents potential injury to the user should the leaf spring 410 loosen. The leaf spring locking device 460 can be composed of screws and nuts.

[0090] The elastic support part of the footplate elastic part 220 and the elastic support part 432 of the bounce compensation part 430 are made of polymer plastic material and are made of polymer plastic material. They are made of a composition containing the following components: thermoplastic resin; thermoplastic rubber; glass fiber; lubricant; acrylic emulsion; copolymer of silane coupling agent containing acrylate group and 2-hydroxyethyl acrylate (HEA); and copolymer of silane coupling agent containing acrylate group, acrylic monomer and 2-hydroxyethyl acrylate (HEA).

[0091] By using high-molecular plastics as the material for the elastic support, the strength, impact resistance, wear resistance, hardness, durability, ozone resistance, and corrosion resistance are improved, thus enabling the long-term stable use of jumping sports equipment.

[0092] Based on 100 parts by weight of thermoplastic resin, the composition may include 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 copolymer of acrylate-containing silane coupling agent and 2-hydroxyethyl acrylate (HEA), and 1 to 10 parts by weight of copolymer of acrylate-containing silane coupling agent, acrylic monomer and 2-hydroxyethyl acrylate (HEA).

[0093] Thermoplastic resins can include, but are not limited to, polyolefins, polyesters, nylon, polyvinyl chloride, polyurethane, acrylic resins, ABS (acrylonitrile-butadiene-styrene copolymer), polycarbonate, and acetal resins.

[0094] The thermoplastic rubber is used to provide elasticity, weather resistance and ozone resistance, and may include, but is not limited to, styrene-based thermoplastic rubber, olefin-based thermoplastic rubber, polyurethane-based thermoplastic rubber, amide-based thermoplastic rubber, ester-based thermoplastic rubber, etc.

[0095] Olefin-based thermoplastic rubbers are particularly preferred, which are obtained by dynamically crosslinking or mixing olefin resins such as polyethylene, polypropylene, and polystyrene with rubbers such as EPDM (ethylene-propylene-diene rubber), natural rubber, and SBR (styrene-butadiene rubber).

[0096] It is preferable to use 10 to 20 parts by weight of thermoplastic rubber relative to 100 parts by weight. If the content of thermoplastic rubber is less than 10 parts by weight, the effect of adding it is minimal. If it exceeds 20 parts by weight, the strength and heat resistance of the elastic support will actually decrease.

[0097] Glass fiber is used to provide strength and heat resistance, and 1 to 10 parts by weight of glass fiber are preferred per 100 parts by weight of thermoplastic resin. If the glass fiber content is less than 1 part by weight, the effect of adding it is negligible, and if it exceeds 10 parts by weight, the interfacial properties, strength, and heat resistance of the elastic support will actually decrease.

[0098] The lubricant is used to improve wear resistance and can be paraffin oil, naphthenic oil, animal and vegetable oils, synthetic oil, grease, graphite, etc.

[0099] Based on 100 parts by weight of thermoplastic resin, the lubricant content is preferably 1 to 10 parts by weight. If the content is less than 1 part by weight, the effect of adding it is negligible. If it exceeds 10 parts by weight, the mechanical and thermal properties of the manufactured elastic support will actually decrease.

[0100] The acrylic emulsion is used to provide adhesion and elasticity, and the acrylic resins used include polymethyl methacrylate, polyethyl methacrylate, polymethyl methacrylate, polyethyl methacrylate, and acrylic copolymers, etc.

[0101] Based on 100 parts by weight of thermoplastic resin, the content of acrylic emulsion is preferably 1 to 10 parts by weight. If the content is less than 1 part by weight, the adhesion and elasticity cannot be fully utilized, and if the content exceeds 10 parts by weight, the strength will decrease instead.

[0102] The copolymer of silane coupling agent containing the acrylate group and 2-hydroxyethyl acrylate (HEA) can improve the adhesion of the components in the composition and improve durability, flame retardancy, heat resistance, etc.

[0103] Examples of silane coupling agents containing acrylate groups include 3-methacryloyloxypropylmethyldimethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-methacryloyloxypropylmethyldiethoxysilane, 3-methacryloyloxypropyltriethoxysilane, 3-acryloyloxypropyltrimethoxysilane, methacryloyloxymethyltriethoxysilane, and methacryloyloxymethyltrimethoxysilane.

[0104] The preferred weight ratio of the silane coupling agent containing acrylate groups to 2-hydroxyethyl acrylate is 20-40:60-80. Within this range, the durability and heat resistance of the composition can be maximized.

[0105] Based on 100 parts by weight of thermoplastic resin, the content of the copolymer is preferably 1 to 10 parts by weight. If the content is less than 1 part by weight, the effect of adding it is negligible, and if it exceeds 10 parts by weight, the strength will actually decrease.

[0106] The copolymer of the silane coupling agent containing acrylate groups, acrylic monomer, and 2-hydroxyethyl acrylate (HEA) improves the adhesion of the components in the composition and enhances durability, flame retardancy, and heat resistance.

[0107] The acrylic monomers include acrylic acid, methacrylic acid, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, decyl methacrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, decyl methacrylate, etc.

[0108] The preferred weight ratio of the silane coupling agent containing acrylate groups, acrylic monomer, and 2-hydroxyethyl acrylate is 2-10:100:20-50. Within this range, the durability and heat resistance of the composition can be maximized.

[0109] Based on 100 parts by weight of thermoplastic resin, the content of the copolymer is preferably 1 to 10 parts by weight. If the content is less than 1 part by weight, the effect of adding it is negligible, and if it exceeds 10 parts by weight, the strength will actually decrease.

[0110] Additionally, the composition may also contain an epoxy compound prepared by mixing bisphenol A (BPA), trimethylolpropane triglycidyl ether (TMPTGE), 1,6-hexanediol diglycidyl ether (HDGE), and butyl glycidyl ether (BGE).

[0111] At this point, based on 100 parts by weight of bisphenol A, it may include 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.

[0112] Based on 100 parts by weight of thermoplastic resin, the content of the epoxy compound is preferably 1 to 10 parts by weight. If the content is less than 1 part by weight, the effect of adding it is negligible, and if it exceeds 10 parts by weight, the strength will actually decrease.

[0113] like Figure 1 As shown, the elastic part 400 of the jumping exercise equipment according to an embodiment of the present invention may include a reference point position confirmation part 450 connected to the leaf spring support part 420 and whose position can be observed and confirmed from the outside.

[0114] The reference point position confirmation unit 450 is necessary for adjusting the intensity of the jumping exercise. Preferably, it allows the user to check the level to which the elasticity of the jumping exercise equipment according to the embodiment of the present invention is set, and to check the current position of the rebound force compensation unit 430, so as to be able to check intuitively.

[0115] To this end, a protrusion is formed on the side of the leaf spring support 420 corresponding to the position of the bounce force compensation part 430. The protrusion protrudes outward to form a movable guide groove. By making the protrusion protrude beyond the guide groove, the position of the bounce force compensation part 430 can be determined once the position of the protrusion is confirmed (see...). Figure 1 ).

[0116] like Figure 3 As shown, the leaf spring pressing part 500 of the jumping exercise equipment according to an embodiment of the present invention may include: an action part 510 that contacts one end of the leaf spring 410 and serves as the point of action; and a reference angle adjustment part 520 that connects the footplate connecting movable part 300 and the action part 510 and adjusts the initial angle formed by the footplate connecting movable part 300 and the fixed plate 100.

[0117] The reference angle adjustment part 520 is used to adjust the angle formed between the part corresponding to the action point of the action part 510 and the foot plate connecting movable part 300, with the part of the foot plate connecting movable part 300 connected to the fixed plate as the center.

[0118] For example, the angle between the plate that serves as the reference for the actuating part 510 and the movable part 300 connecting the footplate can be adjusted by turning the handle.

[0119] For this purpose, various mechanical connecting components can be used, such as various bolts, nuts, connecting shafts, retaining pins, and bearings.

[0120] The leaf spring 410 may have the same thickness, or it may be formed in a shape where the thickness decreases from one side to the other.

[0121] The sports equipment of this invention uses the elastic force of a leaf spring as the primary elastic force, while a coil spring is constructed to serve as a cushioning component. In this case, the elastic force of the leaf spring is determined by its cross-sectional area, while the elastic force of the coil spring is determined by its material and structure. Therefore, these two forces can be strengthened or weakened to apply elastic force, and the elastic response speed can be controlled.

[0122] The leaf spring 410 is formed in a shape where the thickness decreases from one side to the other, i.e., a tapered shape, which allows for adjustment of elastic strength and flexibility to provide optimal elasticity.

[0123] like Figure 1 As shown, a jumping exercise device according to an embodiment of the present invention may include: a support column 600 connected to the fixed plate 100 in a vertically upward direction; and a pedal 700 connected to the support column 600 and capable of moving and being fixed along the support column 600.

[0124] The purpose of the support column 600 is to allow the user to hold it and safely perform jumping movements. The pedal 700 serves as an auxiliary pedal to help the user safely stand on the footboard 200 to perform jumping movements.

[0125] In addition, although not shown in the figure, the jumping exercise equipment of the present invention may also include an elastic pad and an absorbent rubber foot attached to the lower end of the fixed plate 100.

[0126] The noise generated between floors by the aforementioned exercise equipment due to load impact and equipment shaking can be a cause of controversy. The jumping exercise equipment of the present invention can provide cushioning between the floor and the equipment through an elastic pad to prevent inter-floor noise caused by impact, and fix the equipment to the floor by adhering rubber feet to prevent inter-floor noise caused by shaking.

[0127] In addition, the lower end of the fixing plate 100 is provided with bolt mounting holes for installing the moving wheels. The wheels can be used separately under normal circumstances, but when it is necessary to move or change the position, the wheels are installed by connecting the wheel bolts to the bolt mounting holes, making the movement more convenient.

[0128] The present invention will be described in detail below through embodiments and comparative examples. The following embodiments are for illustrative purposes only, and the scope of the present invention is not limited to these embodiments.

[0129] Example 1

[0130] A polyurethane composition was prepared by mixing 15 parts by weight of a thermoplastic rubber blend of 100 parts by weight of polyurethane, 70% by weight of polyethylene and 30% 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-methacryloyloxypropyltrimethoxysilane and 2-hydroxyethyl acrylate (HEA) and 5 parts by weight of a copolymer of 3-methacryloyloxypropyltrimethoxysilane, acrylic acid and 2-hydroxyethyl acrylate (HEA), and then extruding the mixture.

[0131] Example 2

[0132] Except for an additional 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), a polyurethane composition was prepared in the same manner as in Example 1.

[0133] Comparative Example 1

[0134] The polyurethane composition was prepared in the same manner as in Example 1, except that the copolymer of 3-methacryloyloxypropyltrimethoxysilane and 2-hydroxyethyl acrylate was not used.

[0135] Comparative Example 2

[0136] The polyurethane composition was prepared in the same manner as in Example 1, except that polymethyl methacrylate emulsion was not used.

[0137] The tensile strength, heat resistance, coefficient of friction, and acid resistance of the polyurethane compositions prepared by the examples and comparative examples were measured, and the results are shown in Table 1 below.

[0138] Tensile strength was measured according to ASTM D 638. Heat resistance was evaluated by visually observing the degree of yellowing of the composition after heating it in a hot air circulating furnace at 100°C for 3 hours and marked as excellent, good, fair, or poor.

[0139] The coefficient of friction is calculated by measuring the tangential friction force generated under vertical load and rotation at room temperature using a roller-and-disk testing machine.

[0140] Acid resistance was evaluated by immersing the composition in 10% sulfuric acid at room temperature for 5 days and observing the state of the composition, and was marked as excellent, good, fair, or poor.

[0141] Table 1

[0142]

[0143] As can be seen from the results in Table 1, Examples 1 and 2 all exhibited good tensile strength, heat resistance, abrasion resistance, and acid resistance.

[0144] On the contrary, it can be seen that Comparative Examples 1 and 2 are inferior to the Embodiment in terms of the described characteristics.

[0145] Explanation of reference numerals in the attached figures

[0146] 100: Fixing plate; 200: Footboard

[0147] 210: Fixing rod; 220: Elastic part of footplate

[0148] 300: Footplate connecting movable part; 310: Main connecting rod arm

[0149] 320: Auxiliary link arm; 400: Elastic part

[0150] 410: Leaf spring; 420: Leaf spring support section

[0151] 430: Residual force compensation unit for bounce 431: Coil spring

[0152] 432: Elastic support section; 440: Elastic adjustment section

[0153] 450: Reference point position confirmation unit; 460: Leaf spring locking device

[0154] 500: Leaf spring pressing part; 510: Actuating part

[0155] 511: Casing; 512: Outer wheel

[0156] 513: Bearing; 514: Inner Gear

[0157] 515: Pipe; 516: Actuating shaft

[0158] 520: Reference angle adjustment section; 521: Angle adjustment shaft

[0159] 522: Angle adjustment handle; 523: Shaft connection part

[0160] 524: End of angle adjustment section; 525: Ball bearing.

[0161] 600: Support column; 700: Pedal.

Claims

1. A jumping exercise device, comprising: The fixed plate (100) forms the base of the jumping sports equipment; The footboard (200) moves up and down on the upper part of the fixed plate (100) for the user to step on; The footplate connecting movable part (300) is rotatably connected to the fixed plate (100) on one side and rotatably connected to the footplate (200) on the other side, so that the footplate (200) remains horizontal; An elastic part (400) is provided on the fixed plate (100) and includes a leaf spring (410). The leaf spring (410) provides elastic force to the footplate connecting movable part (300) according to the change of the angle formed between the footplate connecting movable part (300) and the fixed plate (100). as well as The leaf spring pressing part (500) is connected to the movable part (300) of the foot plate, and contacts one end of the leaf spring (410) as the point of action. The jumping exercise equipment is characterized by the following features: The footboard (200) includes: A fixing rod (210) is used to fix the footplate (200) so that it does not rotate; and The footplate elastic part (220) is disposed between the footplate (200) and the footplate connecting movable part (300) and has elasticity. The footplate elastic part (220) includes: A coil spring, made of carbon steel, is connected on one side to the footplate connecting movable part (300); and The elastic support, made of polymer plastic, is connected to the end of the helical spring and contacts a portion of the footplate (200). The elastic part (400) further includes: A leaf spring support (420) is provided at the lower part of the leaf spring (410) and is movable in the longitudinal direction of the leaf spring (410); A spring force compensation part (430) is provided on the leaf spring support part (420) and contacts a part of the leaf spring (410) as a reference point. The leaf spring (410) adjusts the spring force provided by the leaf spring (410) to the foot plate connecting movable part (300), and includes an elastic member to compensate for the spring force. An elastic adjustment part (440) is connected to the leaf spring support part (420) to adjust the position of the leaf spring support part (420); A reference point position confirmation unit (450), connected to the leaf spring support unit (420), is capable of observing and confirming the position of the leaf spring support unit (420) from the outside; and A leaf spring locking device (460) is formed on the opposite end of the leaf spring (410) opposite to the contact point that contacts the leaf spring pressing part (500) to fix the leaf spring (410). The bounce energy compensation unit (430) includes: A helical spring (431), made of carbon steel, is connected on one side to the leaf spring adjusting support (420); and The elastic support (432), made of polymer plastic, is connected to the end of the helical spring (431) and contacts a portion of the leaf spring (410). Its upper surface is disc-shaped. The leaf spring pressing part (500) includes: The actuating part (510) contacts a portion of the leaf spring (410) and serves as the point of application; and The reference angle adjustment unit (520) connects the footplate connecting movable part (300) and the actuating part (510), and adjusts the initial angle formed by the footplate connecting movable part (300) and the fixed plate (100). The functional part (510) includes: The housing (511) is located on the outermost side and is in contact with the leaf spring (410); The outer wheel (512) is formed inside the housing (511); A bearing (513) is formed inside the outer wheel (512); The inner wheel (514) is formed inside the bearing (513); A tube (515) is formed inside the inner wheel (514); and The actuating shaft (516) is formed as a rotating shaft inside the tube (515). The actuating part (510), composed of the housing (511), outer wheel (512), bearing (513), inner wheel (514), tube (515), and actuating shaft (516), can instantly change direction, prevent the fastening structure from loosening, improve durability, and prevent noise problems. Even if the bearing changes direction instantaneously due to the action and reaction of the equipment, the driving direction can be freely switched, making its operation frictionless and load-free. The reference angle adjustment unit (520) includes: Angle adjustment shaft (521) serves as a rotation shaft; An angle adjustment handle (522) is used to rotate the angle adjustment shaft (521); The shaft connection part (523) is connected to a selected portion of the angle adjustment shaft (521); The end of the angle adjustment section (524) is bolted to the lower end of the angle adjustment shaft (521); and A ball bearing (525) is connected to the lower part of the end (524) of the angle adjustment section. By rotating the angle adjustment handle (522), the angle adjustment shaft (521) is rotated, thereby adjusting the angle formed between the footplate connecting movable part (300) and the elastic part (400). The shaft connection (523) fixes the wobbling of the angle adjustment shaft (521), and even under the impact generated when using the equipment, the angle adjustment shaft (521) will not deviate and will remain fixed. The ball bearing (525) disperses the impact of the reference angle adjustment part (520) by dispersing the vertical impact of the angle adjustment shaft (521) and improves durability.

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