A spring segmented force adjustment mechanism, arm exerciser and exercise machine

Abstract

The utility model discloses a spring segmented type strength adjusting mechanism, arm strength device and sports equipment, the adjusting mechanism includes axle rod, multistage spring subassembly and a plurality of between adjacent spring unit's gear block, be equipped with the locking mechanism with locking and unlocking state on every gear block, can make one or more spring unit combination participate in stress through selective locking or unlocking gear block, thereby forms different grades's combined spring body, realizes wide range, discrete grading and more accurate resistance adjustment, and the sliding part is arranged at one end of axle rod, is used for transmitting external force to spring subassembly, and the fixed part is arranged at the other end, is used for preventing the component from falling off, and the mechanism compact structure, the adjusting mode is intuitive, need not to replace spring to realize multistage resistance selection, is suitable for arm strength device, tensile device, leg training device and a variety of sports equipment, makes the training process stable, safe and adapts to the exercise demand of different people, has good practicality and popularization value.

Description

Technical Field

[0001] This utility model relates to a sports exercise device, and more particularly to a spring-loaded segmented force adjustment mechanism, which is applied in the field of fitness equipment. Background Technology

[0002] In the field of exercise equipment, adjustable resistance mechanisms are typically required to accommodate the needs of users with different strength levels or training stages. These mechanisms offer multiple resistance levels, allowing users to choose the appropriate training intensity based on their own circumstances, thereby achieving progressive training and improving exercise results.

[0003] For example, patent document CN217526260U discloses a leg exercise device whose force adjustment mechanism mainly includes a screw, a spring sleeved on the screw, and an adjustment knob threaded to the lower end of the screw. In this structure, the upper end of the spring is limited by a U-shaped base, and the lower end is supported by the adjustment knob. By rotating the adjustment knob, the user can change its axial position on the screw, thereby adjusting the initial compression of the spring to adjust the initial tension of the exercise device. During use, the user clamps the two legs together, and the connecting rod assembly drives the screw to move upward, further compressing the spring and generating the resistance required for exercise.

[0004] However, this structure has certain limitations in practical applications: its force adjustment range is mainly limited by the spring's compression stroke and the screw's effective thread length, resulting in a relatively limited adjustable force range, making it difficult to meet the needs of some users for a larger force range or more precise adjustment. Furthermore, when providing high resistance, the single-spring linear compression structure may experience a decrease in adjustment accuracy or an increase in structural size due to spring stiffness limitations, affecting the flexibility of use and the compactness of the instrument. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical defects and provide a new type of force adjustment mechanism. Its core lies in solving the technical problem of how to achieve a wider range, more levels and higher precision resistance adjustment without replacing the spring.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is: a spring segmented force adjustment mechanism, comprising: A shaft; a multi-segment spring assembly mounted on the shaft, the multi-segment spring assembly comprising multiple spring units arranged sequentially along the axial direction of the shaft; Multiple gear blocks, each gear block being sleeved on the shaft and located between two adjacent spring units; A sliding part is provided at one end of the shaft; A fixing part is provided at the other end of the shaft; Each of the gear shift blocks is provided with a locking mechanism, which has a locked state and an unlocked state; When the locking mechanism is in the locked state, the relative position of the stop block and the shaft is fixed; When the locking mechanism is in the unlocked state, the stop block can slide along the shaft, so that the spring units separated by it can work together when subjected to force to form a combined spring body.

[0007] A further preferred embodiment of this utility model is: the locking mechanism includes: A radial locking groove is provided on the surface of the shaft; A locking part is provided on the gear block, and the locking part can move in a direction perpendicular to the radial direction of the shaft; When the locking part is engaged in the axial locking groove, the locking mechanism is in a locked state; When the locking part disengages from the axial locking groove, the locking mechanism is in the unlocked state.

[0008] A further preferred embodiment of this utility model is: a lever is integrally connected to the locking part, and the lever extends to the outside of the gear block to facilitate manual operation of the movement of the locking part.

[0009] A further preferred embodiment of this utility model is that the fixing part is a pin that is vertically inserted through the end of the shaft.

[0010] A further preferred embodiment of this utility model is that the sliding part is a slider or sleeve that can slide along the shaft, used to transmit external force to the multi-segment spring assembly.

[0011] A further preferred embodiment of this invention is that different spring units have different spring stiffness coefficients and / or free lengths.

[0012] A further preferred embodiment of this utility model is: the locking part is located on the lower side of the gear block, and the gear block is provided with a slot for the paddle to pass through. It also includes an upper clamp and a lower clamp, which fix the circumferential position of the locking part and the stop block.

[0013] Another topic: A hand-strengthening device, comprising: a fixed block; The first handle and the second handle are rotatably mounted on the fixed block at their ends via a pivot structure; And the aforementioned spring-segmented force adjustment mechanism; The first end of the shaft of the force adjustment mechanism is fixedly connected to the fixed block; The inner sides of the first handle and the second handle are respectively provided with a squeezing part; The sliding part has inclined guide surfaces on both sides that cooperate with the pressing part; When the first handle and the second handle are gripped in opposite directions, the squeezing part slides along the inclined guide surface, converting the gripping force of the handle into the axial displacement of the sliding part, thereby compressing the multi-segment spring assembly.

[0014] Another topic: A hand-strengthening device, comprising: a fixed block; The first handle and the second handle are rotatably mounted on the fixed block at their ends via a pivot structure; And the aforementioned spring-segmented force adjustment mechanism; The first end of the shaft of the force adjustment mechanism is fixedly connected to the fixed block; The inner sides of the first handle and the second handle are respectively provided with a squeezing part; The sliding part has inclined guide surfaces on both sides that cooperate with the pressing part; When the first handle and the second handle are gripped in opposite directions, the squeezing part slides along the inclined guide surface, converting the gripping force of the handle into the axial displacement of the sliding part, thereby compressing the multi-segment spring assembly; The extrusion part is a roller that is rotatably mounted on the handle.

[0015] Another preferred technical subject: a sports apparatus, comprising: One shaft; A multi-segment spring assembly mounted on the shaft, the multi-segment spring assembly comprising a plurality of spring units arranged sequentially along the axial direction of the shaft; Multiple gear blocks, each gear block being sleeved on the shaft and located between two adjacent spring units; A sliding part is provided at one end of the shaft; A fixing part is provided at the other end of the shaft; Each of the gear shift blocks is provided with a locking mechanism, which has a locked state and an unlocked state; When the locking mechanism is in the locked state, the relative position of the stop block and the shaft is fixed; When the locking mechanism is in the unlocked state, the stop block can slide along the shaft, so that the spring units separated by it can work together when subjected to force to form a combined spring body.

[0016] Compared with the prior art, the advantages of this utility model are: by setting multiple independent spring units and located between them The lockable gear block allows users to flexibly combine one or more spring units into a "combined spring body" by operating the locking mechanism. This is equivalent to integrating multiple springs of different stiffnesses into a single device, thus providing multiple discrete and precise preset force levels and completely overcoming the drawback of the limited adjustment range of a single spring.

[0017] By combining different spring units (such as those with different stiffness and length) in series, it is possible to generate compressive force far exceeding the limits of a single spring, or to achieve a gentler starting force than even the softest single spring. This greatly expands the applicable population and training scenarios for the equipment, covering everything from rehabilitation training to strength training.

[0018] All spring units, shift blocks, and locking mechanisms are integrated onto a single shaft, resulting in a highly compact structure that eliminates the need for complex parallel installation spaces for multiple springs. Users can switch gears with a simple toggle operation, without disassembling or replacing any parts, providing a smooth and efficient experience.

[0019] This utility model, as a universal core adjustment module, can be widely used in various sports equipment such as arm strength trainers, leg exercisers, and resistance bands, enabling these devices to possess high-end, professional adjustable resistance functions. Users can precisely select the matching intensity according to their own abilities, achieving progressive and scientific training, greatly improving training effects and product experience. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram showing the usage state of the arm strength device of this utility model; Figure 2 This is a schematic diagram of the arm strength device of this utility model in its unfolded state; Figure 3 This is a schematic diagram of the arm strength device of this utility model in the closed state; Figure 4 This is a disassembly diagram of the arm strength device structure of this utility model; Figure 5 This is a schematic diagram of the overall structure of the gear shift block of this utility model; Figure 6 This is a structural disassembly diagram of the gear shift block of this utility model; Figure 7 This is a schematic diagram of the shaft and locking part of this utility model. Detailed Implementation

[0022] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0023] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it will not be further defined and explained in subsequent figures.

[0024] like Figures 1 to 3 As shown, the exercise equipment in this embodiment includes various exercise equipment such as arm strength trainers, resistance bands, and leg trainers. This embodiment preferably uses an arm strength trainer 100 for detailed description. The arm strength trainer 100 includes a fixed block 103, a first handle 101, and a second handle 102. The ends of the two handles are rotatably connected to the fixed block 103 via a pivot structure, allowing the two handles to perform opposing gripping actions around their pivot axis. The inner sides of the first handle 101 and the second handle 102 are respectively provided with a squeezing part 20, preferably a roller structure, which can cooperate with the inclined guide surface s of the sliding part 30 during use, reducing frictional resistance and making the clamping action smoother.

[0025] The arm exerciser 100 has a spring-segmented force adjustment mechanism 104 inside. This mechanism includes a shaft 10 arranged longitudinally along the arm exerciser, with the first end of the shaft 10 fixedly connected to a fixing block 103 to provide a support base for all spring units. Multi-segmented spring assemblies 40 are sequentially sleeved on the shaft 10. The multi-segmented spring assembly 40 consists of multiple spring units 41 arranged axially. Each spring unit 41 can have different spring coefficients and / or free lengths to give the overall resistance a wider distribution range.

[0026] like Figures 4 to 6 As shown, a stop block 50 is sleeved between adjacent spring units 41. Each stop block 50 has a locking mechanism 70, which can selectively lock or release the positioning relationship with the shaft 10. The locking mechanism 70 includes a locking groove 71, a locking part 72, and a paddle 73 integrally formed with the locking part 72. The locking part 72 can move in a direction perpendicular to the radial direction of the shaft 10 and is provided with a locking hole r1 and an unlocking hole r2 that communicate with each other.

[0027] When the locking hole r1 aligns with the locking groove 71, the stop block 50 is reliably restrained on the shaft 10 and cannot move up or down; when the unlocking hole r2 aligns with the shaft 10, the stop block 50 can slide freely along the shaft 10, causing the spring units 41 on both sides to participate in the force. To ensure the positional stability of the locking part 72 in the circumferential direction, the stop block 50 is also provided with an upper clamping piece 01 and a lower clamping piece 02, so that the locking part 72 can maintain accurate positioning even under long-term force.

[0028] Furthermore, a fixing part 60 is installed at the end of the shaft 10 away from the fixing block 103. The fixing part 60 is a pin that passes vertically through the end of the shaft 10 to prevent each spring unit 41 and the stop block 50 from falling off the end of the shaft 10. A sliding part 30 is provided at the end near the fixing block 103. Inclined guide surfaces s are formed on the left and right sides of the sliding part 30, so that the squeezing part 20 can slide smoothly along the guide surface when the user grips it, converting the clamping force of the handle into the axial movement of the sliding part 30, thereby transmitting the external force to the multi-segment spring assembly 40 and compressing the selected spring unit 41.

[0029] This embodiment allows for resistance adjustment according to user needs. Beginners can keep all gear blocks 50 locked, engaging only the topmost spring unit 41 to achieve minimal initial resistance. As training levels improve, users can simply move the corresponding lever 73 to unlock the lower gear blocks 50 sequentially, gradually increasing the number of engaging spring units 41. When all gear blocks 50 are unlocked, all spring units 41 will work together, forming a combined spring body with maximum resistance, suitable for users with a fitness foundation or those seeking high-intensity training.

[0030] It should be noted that the advantage of the multi-segment spring structure lies in its ability to provide multiple distinct resistance levels with continuous resistance logic: only when adjacent stop blocks 50 are unlocked consecutively can the corresponding spring unit 41 continuously provide elastic potential energy; if a stop block 50 in the middle is locked, the spring unit 41 below it will not participate in the force, and therefore the accumulation of elastic potential energy cannot be achieved. This linear and controllable resistance adjustment method makes the training process safer and more controllable.

[0031] In practical use, when the user holds the two handles 101 and 102 with both hands and applies inward force, the squeezing part 20 slides along the inclined guide surface s, causing the sliding part 30 to move towards the fixed part 60, thereby compressing the preset spring combination. When the handles are released, the sliding part 30 automatically returns to its initial position under the elastic force of the spring unit 41. The entire movement process is smooth and the resistance changes are stable, which can meet the different needs of strength training, endurance training and rehabilitation training.

[0032] Preferably, the squeezing part 20 is a roller structure rotatably mounted inside the handle. This roller can rotate freely around its own central axis, effectively reducing frictional resistance when it contacts and moves relative to the inclined guide surfaces s on both sides of the sliding part 30. When the user grips the handle, the roller rolls and slides along the inclined guide surfaces s, making the displacement of the sliding part 30 smoother and more linear, avoiding the jamming or jerking sensation caused by traditional fixed protrusion structures. At high resistance levels, the rolling characteristics of the roller make it easier for the user to apply force, resulting in a better training experience.

[0033] In summary, based on the structure of this embodiment, the arm strength trainer 100 can adapt to training needs of different intensities and frequencies during actual use. Utilizing the structural features of the multi-segment spring assembly 40, users can sequentially shift from light resistance to high resistance by moving the levers 73 on the gear block 50, covering various training scenarios such as strength enhancement, endurance improvement, and rehabilitation training. Thanks to the rolling cooperation between the sliding part 30 and the compression part 20 (roller), the resistance curve throughout the compression stroke is smoother and does not exhibit abrupt changes, allowing users to complete multiple repetitive training sessions under stable force.

[0034] Furthermore, the multi-segment spring assembly 40 undergoes axial linear compression during the force application process, and each spring unit 41 can maintain a stable release of elastic potential energy under selected conditions, preventing structural failure due to eccentric force. Even after repeated locking-unlocking actions, the stop block 50 maintains reliable positioning accuracy through the double-hole structure (locking hole r1 and unlocking hole r2) of the locking part 72, ensuring a safe and reliable training process.

[0035] The structure of this embodiment also possesses excellent durability and ease of maintenance. Since each spring unit 41 can be replaced independently, when a section of spring becomes fatigued due to prolonged use, maintenance can be performed individually without disassembling the entire device, thereby reducing subsequent maintenance costs. Furthermore, users can choose to replace spring units 41 with higher or lower stiffness according to their own training habits, ensuring that this arm strength trainer maintains its targeted and practical nature during long-term use.

[0036] Through the synergistic effect of the above structure and usage, the arm strength trainer 100 provided in this embodiment not only makes the resistance adjustment process more scientific and precise, but also significantly improves the training experience, meeting the needs of a wide range of trainees from beginners to high-intensity trainees, and has good promotion and application value.

[0037] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Similarly, "first" and "second" are only for ease of understanding and have no other directional meaning, and cannot be considered as limitations on this utility model.

[0038] This invention introduces a spring-loaded segmented force adjustment mechanism, arm strength trainer, and exercise equipment. Specific examples are used to illustrate the principle and implementation of this invention. The descriptions of the embodiments are merely for the purpose of helping to understand this invention and its core concepts. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A spring-loaded segmented force adjustment mechanism, characterized in that, include: One shaft; A multi-segment spring assembly mounted on the shaft, the multi-segment spring assembly comprising a plurality of spring units arranged sequentially along the axial direction of the shaft; Multiple gear blocks, each gear block being sleeved on the shaft and located between two adjacent spring units; A sliding part is provided at one end of the shaft; A fixing part is provided at the other end of the shaft; Each of the gear shift blocks is provided with a locking mechanism, which has a locked state and an unlocked state; When the locking mechanism is in the locked state, the relative position of the stop block and the shaft is fixed; When the locking mechanism is in the unlocked state, the shift block can slide along the shaft, so that the spring units separated by it can work together when subjected to force to form a combined spring body.

2. The spring-loaded segmented force adjustment mechanism according to claim 1, characterized in that, The locking mechanism includes: A radial locking groove is provided on the surface of the shaft; A locking part is provided on the gear block, and the locking part can move in a direction perpendicular to the radial direction of the shaft; When the locking part is engaged in the radial locking groove, the locking mechanism is in a locked state; When the locking part disengages from the radial locking groove, the locking mechanism is in the unlocked state.

3. The spring-segmented force adjustment mechanism according to claim 2, characterized in that, The locking part is integrally connected to a lever, which extends to the outside of the gear block to facilitate manual operation of the locking part.

4. The spring-loaded segmented force adjustment mechanism according to claim 1, characterized in that, The fixing part is a pin that passes vertically through the end of the shaft.

5. The spring-segmented force adjustment mechanism according to claim 1, characterized in that, The sliding part is a slider or sleeve that can slide along the shaft, used to transmit external force to the multi-segment spring assembly.

6. The spring-segmented force adjustment mechanism according to claim 1, characterized in that, Different spring units have different spring stiffness coefficients and / or free lengths.

7. The spring-segmented force adjustment mechanism according to claim 3, characterized in that, The locking part is located on the lower side of the gear block, and the gear block is provided with a slot for the paddle to pass through. It also includes an upper clamp and a lower clamp, which fix the circumferential position of the locking part and the stop block.

8. An arm strength trainer, characterized in that, include: Fixed block; The first handle and the second handle are rotatably mounted on the fixed block at their ends via a pivot structure; And a spring-loaded segmented force adjustment mechanism as described in any one of claims 1-7; The first end of the shaft of the force adjustment mechanism is fixedly connected to the fixed block; The inner sides of the first handle and the second handle are respectively provided with a squeezing part; The sliding part has inclined guide surfaces on both sides that cooperate with the pressing part; When the first handle and the second handle are gripped in opposite directions, the squeezing part slides along the inclined guide surface, converting the gripping force of the handle into the axial displacement of the sliding part, thereby compressing the multi-segment spring assembly.

9. An arm strength trainer, characterized in that, include: Fixed block; The first handle and the second handle are rotatably mounted on the fixed block at their ends via a pivot structure; And a spring-loaded segmented force adjustment mechanism as described in any one of claims 1-7; The first end of the shaft of the force adjustment mechanism is fixedly connected to the fixed block; The inner sides of the first handle and the second handle are respectively provided with a squeezing part; The sliding part has inclined guide surfaces on both sides that cooperate with the pressing part; When the first handle and the second handle are gripped in opposite directions, the squeezing part slides along the inclined guide surface, converting the gripping force of the handle into the axial displacement of the sliding part, thereby compressing the multi-segment spring assembly; The extrusion part is a roller that is rotatably mounted on the handle.

10. A type of exercise equipment, characterized in that, include: One shaft; A multi-segment spring assembly mounted on the shaft, the multi-segment spring assembly comprising a plurality of spring units arranged sequentially along the axial direction of the shaft; Multiple gear blocks, each gear block being sleeved on the shaft and located between two adjacent spring units; A sliding part is provided at one end of the shaft; A fixing part is provided at the other end of the shaft; Each of the gear shift blocks is provided with a locking mechanism, which has a locked state and an unlocked state; When the locking mechanism is in the locked state, the relative position of the stop block and the shaft is fixed; When the locking mechanism is in the unlocked state, the shift block can slide along the shaft, so that the spring units separated by it can work together when subjected to force to form a combined spring body.

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