# US 2024/0189652 A1 · Resistance pulley structure, rowing machine, and rowing high-position pull-down integrated machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0189652 A1 - Document ID: US20240189652A1 - Status: Published application - Kind: A1 - Application number: 18/120,444 - Filed: 2023-03-13 - Published: 2024-06-13 - Earliest claimed: 2022-12-09 - Assignees: Sunny Distributor Inc. - Applicants: Sunny Distributor Inc. - Inventors: Yu Sun - Web page: https://patentgrep.com/patent/US20240189652A1 ## CPC - A63B 21/0051: {using eddy currents induced in moved elements, e.g. by permanent magnets} - A63B 21/154: {using special pulley-assemblies} - A63B 21/00069: {Setting or adjusting the resistance level; Compensating for a preload prior to use, e.g. changing length of resistance or adjusting a valve} - A63B 21/00192: {using resistance provided by magnetic means (A63B21/005 takes precedence)} - A63B 21/153: {wound-up and unwound during exercise, e.g. from a reel} - A63B 21/157: {Ratchet-wheel links; Overrunning clutches; One-way clutches} - A63B 21/225: {with flywheels} - A63B 22/0076: {Rowing machines for conditioning the cardio-vascular system (seats moving during exercise A63B22/0087; training appliances for rowing or sculling on boats A63B69/06)} - A63B 22/0087: {with a seat or torso support moving during the exercise, e.g. reformers (A63B22/0076 takes precedence)} - A63B 2022/0035: {Upper limbs performing together the same movement, e.g. on a single support element} - A63B 2022/0079: {with a pulling cable} - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) ## Abstract The present disclosure discloses a resistance pulley structure, including symmetrical stay cord assemblies, transmission assemblies, resistance assemblies and driving parts. The stay cord assemblies include a stay cord, a first and a second fixed pulley blocks and a movable pulley block. The movable pulley block includes a left and right movable pulleys, and the second fixed pulley block includes a second left fixed pulley and a second right fixed pulley. The rotation direction of the second fixed pulley block is perpendicular to the rotation direction of the first fixed pulley. After the stay cord bypasses the first fixed pulley, two ends bypass the left and right movable pulley respectively, then bypass the second left fixed pulley and the second right fixed pulley respectively, and connected to the driving parts. The present disclosure has the advantages of convenient force bearing, high stability, and the ability to adjust the tensile strength. ## Claims ### Claim 1 A resistance pulley structure, comprising symmetrical stay cord assemblies, transmission assemblies, resistance assemblies and driving parts; wherein the stay cord assemblies comprise a stay cord, a first fixed pulley, a movable pulley block and a second fixed pulley block; the movable pulley block comprises a left movable pulley and a right movable pulley; the second fixed pulley block comprises a second left fixed pulley and a second right fixed pulley; a rotation direction of the second fixed pulley block is perpendicular to a rotation direction of the first fixed pulley; after the stay cord bypasses the first fixed pulley, two ends of the stay cord bypass the left movable pulley and the right movable pulley respectively, then bypass the second left fixed pulley and the second right fixed pulley respectively, the two ends of the stay cord are respectively connected to one driving part after bypassing the second left fixed pulley and the second right fixed pulley; and two driving parts pulls the movable pulley block to rotate and slide through the stay cord, the first fixed pulley and the second fixed pulley; a third fixed pulley is provided between the movable pulley block and the transmission assemblies, and the third fixed pulley is connected to the resistance assemblies through the transmission assemblies. ### Claim 2 (depends on 1) The resistance pulley structure as claimed in claim 1, wherein: the transmission assemblies comprise a main transmission belt, an auxiliary transmission belt and a drive pulley and a driven pulley that are provided parallel to each other; one end of the main transmission belt is fixedly connected to the drive pulley, an other end bypasses the third fixed pulley and is fixedly connected to the movable pulley block, and a transmission shaft of the driven pulley is connected with the drive pulley through the auxiliary transmission belt and is driven by the drive pulley. ### Claim 3 (depends on 1) The resistance pulley structure as claimed in claim 1, wherein: the resistance assemblies comprise a first magnetic part provided on an outer periphery of the driven pulley and a second magnetic part provided outside the first magnetic part; a space is provided between the first magnetic part and the second magnetic part, and the first magnetic part and the second magnetic part cooperate to generate magnetic resistance to limit a rotation speed of the driven pulley. ### Claim 4 (depends on 3) The resistance pulley structure as claimed in claim 3, wherein: the second magnetic part is arc-shaped, two ends of the second magnetic part are respectively a fixed end and a free end; the fixed end is fixed below the first magnetic part, and the free end swings close to or away from the first magnetic part. ### Claim 5 (depends on 3) The resistance pulley structure as claimed in claim 3, further comprising a resistance adjusting assemblies; wherein the resistance adjusting assemblies comprise an adjusting knob, an adjusting tube and an adjusting plate; the adjusting plate is provided on the second magnetic part, the adjusting tube is movably provided on the adjusting plate, and drives the adjusting plate to move up and down; the adjusting plate is further connected with a reset spring; and the adjusting knob drives the second magnetic part to approach or move away from the first magnetic part through the adjusting tube, the adjusting plate and the reset spring. ### Claim 6 (depends on 1) The resistance pulley structure as claimed in claim 1, wherein: a fourth fixed pulley is provided between the driving part and the stay cord; the stay cord is connected to the driving part by bypassing the fourth fixed pulley, the fourth fixed pulley is provided with a rotating part, and the rotating part rotates to drive the driving part to rotate. ### Claim 7 (depends on 1) A rowing machine, comprising the resistance pulley structure according to claim 1 and a seat main frame; wherein the resistance pulley structure comprises symmetrical stay cord assemblies, transmission assemblies, resistance assemblies and driving parts; the driving parts are a paddle group comprising two paddles, the two paddles are respectively provided on both sides of the seat main frame, and bottom ends of the two paddles are universally connected to the seat main frame; the stay cord assemblies comprise a stay cord, a first fixed pulley, a movable pulley block and a second fixed pulley block; the second fixed pulley block is provided above the first fixed pulley, a rotation direction of the second fixed pulley block is perpendicular to a rotation direction of the first fixed pulley; the movable pulley block comprises a left movable pulley and a right movable pulley, the second fixed pulley block comprises a second left fixed pulley and a second right fixed pulley; after the stay cord bypasses the first fixed pulley, two ends of the stay cord extend backwards symmetrically, and bypass the left movable pulley and the right movable pulley respectively, then the two ends are folded and extend forwards to bypass the second left fixed pulley and the second right fixed pulley respectively; the two ends of the stay cord respectively bypass the second left fixed pulley and the second right fixed pulley, and are respectively connected to a top of one paddle or connected to the top of one paddle at a same time; a third fixed pulley is provided between the movable pulley block and the transmission assemblies, and the third fixed pulley is connected to the resistance assemblies through the transmission assemblies. ### Claim 8 (depends on 7) The resistance pulley structure as claimed in claim 7, wherein: the two ends of the stay cord are respectively provided with a pull ring, and two pull rings are respectively connected to one paddle or connected to a same paddle at a same time. ### Claim 9 (depends on 1) A rowing high-position pull-down integrated machine, comprising a base, a support beam, and the resistance pulley structure according to claim 1; wherein the resistance pulley structure comprises symmetrical stay cord assemblies, transmission assemblies, resistance assemblies and driving parts; the base is provided with a first leg supported on a ground, the support beam is longitudinally connected to one side of the base at an angle, the support beam is provided with a second leg and a driving part at an end far away from the base, and the second leg is supported on the ground together with the first leg or lifted off the ground with the support beam relative to the base; the base and the support beam are respectively provided with a first seat part and a second seat part on one side of the angle, the first seat part and the second seat part are for people to sit or lean on; the resistance assemblies are provided inside the base and provided at a back of the first seat part; the driving parts comprise a handle or two handles provided in parallel, the stay cord assemblies comprise a stay cord, a first fixed pulley, a movable pulley block and a second fixed pulley block; the first fixed pulley block, the movable pulley block and the second fixed pulley block are provided inside the support beam, the second fixed pulley block is provided above the first fixed pulley block, and a rotation direction of the second fixed pulley block is perpendicular to a rotation direction of the first fixed pulley; the movable pulley block comprises a left movable pulley and a right movable pulley, the second fixed pulley block comprises a second left fixed pulley and a second right fixed pulley; after the stay cord bypasses the first fixed pulley, two ends of the stay cord bypass the left movable pulley and the right movable pulley respectively, then bypass the second left fixed pulley and the second right fixed pulley respectively, the two ends of the stay cord are respectively connected to one handle respectively or connected to a same handle after bypassing the second left fixed pulley and the second right fixed pulley; a third fixed pulley is provided between the movable pulley block and the transmission assemblies, and the third fixed pulley is connected to the resistance assemblies through the transmission assemblies. ### Claim 10 (depends on 9) The resistance pulley structure as claimed in claim 9, further comprising a swing adjusting mechanism; wherein the base is provided with the swing adjusting mechanism on a side connected to the support beam, and the support beam is rotatably connected on the base by the swing adjusting mechanism, such that the support beam is made to perform swinging motion relative to the base, and the angle between the support beam and the base is adjusted by the swing adjusting mechanism.