Exercise assisting device

Abstract

The utility model belongs to the technical field of exercise fitness equipment, and provides an exercise assisting device which comprises a rack, a pair of pressing plates and an adjusting mechanism, the pair of pressing plates are arranged on the rack through hinge seats respectively, and the pair of pressing plates are used for bearing external force to move on the hinge seats; the adjusting mechanism comprises an installation frame, a driving mechanism, a sliding block, a pair of force arms and a pair of springs connected with the pressing plate, the pair of force arms are symmetrically connected to the sliding block, and the extending ends of the pair of force arms are connected with the pair of springs; the driving mechanism is arranged on the mounting frame and can drive the sliding block to move linearly and adjust the stretching length of the pair of springs at the same time. The technical problem that pre-tightening value adjustment of two stress pressing plates on a motion assisting device in the prior art cannot be unified is solved.

Description

Technical Field

[0001] The present application belongs to the technical field of sports and fitness equipment, and in particular, relates to a sports auxiliary device capable of steplessly adjusting the pressure resistance value. Background Art

[0002] Due to economic development, people's work has changed from physical labor to mental labor. With the increase of obesity and lack of exercise, people often exercise at home, such as doing sit-ups and yoga. Many people look at their gradually growing belly, pinch their fat with their hands, and confidently sign a military order, but often they surrender after barely doing one or two sit-ups, thus losing confidence in exercise and letting the fat grow. Therefore, exercise assistive devices that can be used at home are launched on the market, so that users can easily perform the above exercises at home.

[0003] The core structure of common exercise assistive devices generally includes two pressure plates and an adjustment mechanism. The adjustment mechanism is used to adjust the prestress of the two pressure plates to achieve different intensities of exercise. For example, the two pressure plates can simultaneously support the back of a person to achieve exercise movements such as sit-ups; or, the two pressure plates can be used as footrests for people to step on to exercise their legs. In this way, users can exercise their leg muscles while watching TV or playing with their mobile phones, allowing fitness enthusiasts to better achieve their exercise goals and build confidence in exercise.

[0004] In the prior art sports assisting device, the adjustment mechanism generally includes an adjustment knob and an elastic member, and the elastic member includes a structure using a torsion spring or a spring. For the structure using a torsion spring, a torsion spring is used to apply a rebound force to the pressure plate. However, the torsion spring elastic force value is a fixed value, and the rebound force cannot be adjusted according to the needs of consumers, or can only be adjusted in steps and gears.

[0005] For the structure using springs, the pre-tension of the spring can be adjusted by the knob, so as to achieve gear adjustment of different strengths. However, each knob corresponds to a pressure plate for adjustment, so that the pre-tension of the two pressure plates is adjusted separately, and the torque of the knob is large, resulting in the pre-tension value of the two pressure plates cannot be adjusted uniformly. During exercise, the force on the left and right sides will be inconsistent, and after a long time of exercise, the left and right muscles will be unbalanced, affecting the exercise effect.

[0006] Therefore, the existing sports assisting devices still have many defects, which is a research problem that sports and fitness equipment manufacturers urgently need to solve. Summary of the invention

[0007] The purpose of the embodiments of the present application is to provide a motion assisting device to solve the technical problem that the preload values ​​of the two force-bearing pressure plates on the prior art motion assisting devices cannot be adjusted in a unified manner.

[0008] To achieve the above object, the technical solution adopted in this application is: to provide a motion assistance device, including:

[0009] A frame;

[0010] A pair of pressing plates, which are respectively arranged on the frame through hinge seats, and the pair of pressing plates are used to bear external forces and move on the hinge seats;

[0011] An adjustment mechanism, including a mounting bracket, a driving mechanism, a slider, a pair of force arms, and a pair of springs respectively connected to the pressing plates. The pair of force arms are symmetrically connected to the slider, and the extending ends of the pair of force arms are respectively connected to the pair of springs; the driving mechanism is arranged on the mounting bracket and can drive the slider to move linearly, while adjusting the stretching lengths of the pair of springs.

[0012] In this way, the driving mechanism drives the slider to move linearly, and at the same time drives a pair of force arms to stretch the springs respectively, infinitely changing the lengths of the springs, realizing the simultaneous adjustment of the two force arms, making the stretched lengths of the two springs unified, and effectively ensuring the unity of the pre-tightening values of the two force-bearing pressing plates.

[0013] An improvement is made to the adjustment mechanism. The driving mechanism includes a lead screw, which is centrally arranged between the pair of springs and extends parallel to the pair of springs in the same direction; the adjustment mechanism further includes a pair of first fixing plates symmetrically arranged, and the pair of first fixing plates horizontally extend outward from both sides of the mounting bracket; one end of the force arm is movably connected to the slider, the other end of the force arm is connected to the spring, and the extending end of the first fixing plate is rotationally connected to the part between the two ends of the force arm. In this way, the stretched lengths of the two springs are adjusted synchronously, and the pre-tightening values of the force-bearing pressing plates respectively connected by the two springs are unified.

[0014] In one embodiment, symmetrically arranged connecting rings are respectively arranged on both sides of the slider, and insertion shafts for inserting into the connecting rings are arranged at the ends of the force arms, so that the ends of the force arms are movably connected to the slider.

[0015] Another improvement is made to the adjustment mechanism. The driving mechanism includes a lead screw, which is centrally arranged between the pair of springs; the adjustment mechanism further includes second fixing plates extending outward from both sides of the mounting bracket. One end of the force arm is movably connected to the slider, the other end of the force arm is rotationally connected to the extending end on the second fixing plate, and the end of the spring is connected to the part between the two ends of the force arm. In this way, the ends of the two springs are fixedly connected to the middle of the force arm, so that the two springs do not extend onto the force arm in parallel, but the extending ends of the two springs approach each other towards the lead screw, thereby increasing the stretching limit of the two springs, increasing the overall torque, and effectively increasing the adjustment range.

[0016] In one embodiment, the slider is a ring body with internal threads, and the upper connecting shaft and the lower connecting shaft are symmetrically arranged up and down on the slider; first long holes are respectively arranged at the ends of the pair of force arms, and the first long holes are respectively sleeved on the upper connecting shaft; a slide rail is arranged on the mounting bracket below the lead screw, and the lower connecting shaft on the slider is inserted into the slide rail, and the displacement stroke of the slider is limited by the slide rail.

[0017] The present application also provides another motion assistance device, including:

[0018] A frame;

[0019] A pair of pressing plates, which are respectively arranged on the frame through hinge seats, and the pair of pressing plates are used to bear external forces and move on the hinge seats;

[0020] An adjusting mechanism, including a mounting bracket, a driving mechanism, a pair of sliders, a pair of force arms, a pair of springs and a pair of connecting shafts, the slider is movably connected to the part between the two ends of the force arm, and the movable connection point is set as the rotation fulcrum of the force arm;

[0021] Wherein, the pair of pressing plates, the hinge seats thereon, the pair of force arms, the pair of connecting shafts and the pair of springs are connected in a staggered manner, and the relationship of the staggered connection is set as: one of the pair of pressing plates is arranged on one of the hinge seats and is connected to one of the connecting shafts, the other end of the connecting shaft is connected to one of the force arms, the other end of the force arm is connected to one of the springs, and the other end of the spring is connected to the hinge seat on the other one of the pair of pressing plates;

[0022] A pair of stroke grooves for respectively limiting the displacement strokes of the respective sliders are arranged on the mounting bracket, and the pair of sliders are respectively embedded in the stroke grooves corresponding in position;

[0023] The driving mechanism is arranged on the mounting bracket and can drive the pair of sliders to move linearly synchronously, so that the pair of sliders approach or move away from each other, thereby changing the positions of the rotation fulcrums on the pair of force arms at the same time.

[0024] The whole structure utilizes the lever principle to adjust the stretchable lengths of the two springs by changing the rotation fulcrums on the force arms. In the movement of the pressing plate being pressed by an external force, the connecting shaft will pull the force arm to rotate around the rotation fulcrum, so that the force arm swings within the stretchable range of the spring on the other side. Thus, when driving the two sliders to move, only the rotation fulcrums on the force arms are synchronously changed. Therefore, during the whole adjustment process, the force applied by the human hand will not oppose the elastic force of the spring, making the adjustment more labor-saving and easier.

[0025] In one embodiment, the mounting bracket includes a bottom plate, and a pair of the stroke grooves are formed in the bottom plate, and the pair of stroke grooves are arranged on the bottom plate in a staggered manner; each of the pair of force arms is provided with a second long hole corresponding to the position of the stroke groove; the driving mechanism includes a lead screw, and each of the pair of sliders includes a column and a socket ring for sleeving on the lead screw, and the column sequentially passes through the second long hole and the stroke groove, and the adjustable position of the rotation fulcrum is defined by the stroke groove.

[0026] In one embodiment, at least a part of the lead screw is a non-threaded section, and a first threaded section and a second threaded section extend from both ends of the non-threaded section to both ends of the lead screw respectively, and the thread textures of the first threaded section and the second threaded section are arranged in opposite directions, and the pair of sliders are respectively arranged on the first threaded section and the second threaded section. Thus, under the single-direction rotation of the lead screw, the two sliders can approach each other or move away from each other. The non-threaded section is used to define the approaching limit position of the two sliders, and further set the swing range of the two force arms, so as to avoid the two force arms being prone to interference with each other during operation.

[0027] In one embodiment, the pair of force arms are symmetrically arranged on the mounting bracket, and each of the pair of force arms is provided with a bending portion adjacent to the second long hole to increase the swing amplitude of the force arm.

[0028] In one embodiment, the mounting bracket further includes vertical plates on both sides, and each of the vertical plates on both sides is provided with a horizontally arranged avoidance groove; the pair of force arms can respectively extend into the avoidance grooves of the vertical plates on both sides during swinging, thereby increasing the swing amplitude of the force arms, which is beneficial to increasing the stretchable length of the spring.

[0029] The beneficial effect of the motion assistance device provided by the present application is that: compared with the prior art, the motion assistance device of the present application adopts a method of driving the slider to move linearly, and simultaneously drives a pair of force arms connected to the slider to stretch the springs respectively, and steplessly changes the length of the springs, realizing the simultaneous adjustment of the two force arms, making the stretched lengths of the two springs unified, and further making the pre-tension forces of the force-receiving pressure plates respectively connected by the two springs balanced, effectively ensuring the unity of the pre-tightening values of the two force-receiving pressure plates.

[0030] In addition, the motion assistance device of the present application also adjusts the stretchable length of the spring by changing the rotation fulcrum of the force arm, so that the human hand does not need to resist the elastic force of the spring during the adjustment process, making the adjustment more labor-saving and easier, and improving the use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for use in the embodiments or the description of the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0032] Figure 1 Schematic diagram of the three-dimensional structure of the first motion assistance device provided by the embodiment of the present application;

[0033] Figure 2 View of the state where a pressure plate in the first motion assistance device provided by the embodiment of the present application is pressed downward under force;

[0034] Figure 3 View of the state where the spring in the first motion assistance device provided by the embodiment of the present application is stretched;

[0035] Figure 4 View of the state where a pressure plate is pressed downward under force after the spring in the first motion assistance device provided by the embodiment of the present application is stretched;

[0036] Figure 5 Schematic diagram of the three-dimensional structure of the second motion assistance device provided by the embodiment of the present application;

[0037] Figure 6 View of the state where a pressure plate in the second motion assistance device provided by the embodiment of the present application is pressed downward under force;

[0038] Figure 7 View of the spring in the non-stretched state in the second motion assistance device provided by the embodiment of the present application;

[0039] Figure 8 View of the state where a pressure plate is pressed downward under force when the spring in the second motion assistance device provided by the embodiment of the present application is in the non-stretched state;

[0040] Figure 9 Schematic diagram of the three-dimensional structure of the third motion assistance device provided by the embodiment of the present application;

[0041] Figure 10 Top view structure diagram of the third motion assistance device provided by the embodiment of the present application;

[0042] Figure 11 View of the state where a pressure plate in the third motion assistance device provided by the embodiment of the present application is pressed downward under force;

[0043] Figure 12 View of the state where the stretching stroke of the spring is increased after the rotation fulcrum is adjusted in the third motion assistance device provided by the embodiment of the present application;

[0044] Figure 13 Exploded structural schematic diagram of the mounting bracket, lead screw, slider and force arm in the third motion assistance device provided by the embodiment of the present application;

[0045] Figure 14 Top view of the lead screw of the third motion assistance device provided by the embodiment of the present application mounted on the mounting bracket through the slider.

[0046] Among them, the reference numerals in the figure are as follows:

[0047] 1 - frame; 11 - reinforcing frame;

[0048] 2 - pressing plate; 21 - connecting part;

[0049] 3 - hinge seat; 31 - shaft hole;

[0050] 4 - mounting bracket; 41 - first fixing plate; 42 - second fixing plate; 421 - lug; 43 - slide rail; 44 - travel groove; 45 - bottom plate; 46 - vertical plate; 461 - avoidance groove;

[0051] 5 - lead screw; 50 - knob; 51 - non - threaded section; 52 - first threaded section; 53 - second threaded section;

[0052] 6 - slider; 61 - connecting ring; 62 - upper connecting shaft; 63 - lower connecting shaft; 64 - column; 65 - socket ring;

[0053] 7 - force arm; 71 - insertion shaft; 72 - first long hole; 73 - second long hole; 74 - bending part;

[0054] 8 - spring;

[0055] 9 - connecting shaft; 91 - connecting ear; 92 - third long hole. Detailed implementation manners

[0056] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0057] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0058] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0059] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0060] In the related art, some products only apply a resilience force to the pressing plate (or the backrest part) through a simple torsion spring. However, since the elastic force value of the torsion spring is a fixed value, the resilience force cannot be adjusted according to the needs of consumers, or can only be adjusted in grades and positions.

[0061] In another related art, for some products using a spring in the adjustment mechanism, a knob is used to adjust the pre-tightening value of the spring connected to each of the two force-bearing pressing plates in the device. However, since the pre-tightening tensions of the two pressing plates are adjusted separately and the torque of the knob is large, the pre-tightening values of the two pressing plates cannot be adjusted to be the same. Eventually, when the user exercises, the problem of uneven force on the left and right sides is likely to occur, and uneven muscles on the left and right will appear after long-term exercise, affecting the exercise effect.

[0062] Therefore, the embodiment of the present application provides a new type of exercise assistance device, which can achieve stepless adjustment of the pre-tightening force magnitudes of the two force-bearing pressing plates and can simultaneously and evenly adjust the pre-tightening values of the two force-bearing pressing plates, effectively solving the technical problem that the pre-tightening values of the two force-bearing pressing plates on the traditional exercise assistance device cannot be unified. Now, it will be described in detail.

[0063] In the first embodiment provided by the embodiment of the present application

[0064] Please refer to Figure 1 、 Figure 2 and Figure 3 , the exercise assistance device includes a frame 1, a pair of pressing plates 2 and an adjustment mechanism.

[0065] The frame 1 can be set according to the appearance shape of the device. In this embodiment, as Figure 1As shown, the frame 1 is preferably a substrate located at the overall bottom; in other embodiments, the frame 1 can also be a bracket structure capable of supporting the whole (not shown in the figure), and no specific limitation is made here.

[0066] The pair of pressing plates 2 are oppositely arranged on the frame 1 relative to the adjusting mechanism. Specifically, as Figure 1 shown, the adjusting mechanism can be arranged near the front end of the frame 1, and the pair of pressing plates 2 are arranged near the rear end of the frame 1.

[0067] The pair of pressing plates 2 are respectively arranged on the frame 1 through hinge seats 3, and the pair of pressing plates 2 are used to bear external forces and move on the hinge seats 3 respectively. In actual applications, the pair of pressing plates 2 can be used together as a backrest or respectively as footrests according to exercise needs for use during exercise.

[0068] Regarding the installation structure between the pressing plate 2 and the hinge seat 3, in this embodiment, as Figure 2 shown, the hinge seat 3 is arranged on the frame 1, and the hinge seat 3 is provided with a shaft hole 31. The bottom of each pressing plate 2 has a connecting portion 21, and the connecting portion 21 is embedded on the hinge seat 3. A rotating shaft is provided on the connecting portion 21, and the rotating shaft is inserted into the shaft hole 31 of the hinge seat 3 to achieve a rotating shaft connection. In this way, the pressing plate 2 can make a vertical rotation movement on the hinge seat 3.

[0069] Please refer to Figure 1 、 Figure 2 and Figure 3 simultaneously. The adjusting mechanism includes a mounting frame 4, a driving mechanism, a slider 6, a pair of force arms 7, and a pair of springs 8 respectively connected to the pressing plate 2. The driving mechanism includes a lead screw 5 and a knob 50 arranged on the lead screw 5. The slider 6 is arranged on the lead screw 5 and can move along the length direction of the lead screw 5 on the lead screw 5.

[0070] The pair of force arms 7 are symmetrically connected to the slider 6, and the extending ends of the pair of force arms 7 are respectively fixedly connected to the pair of springs 8. Here, it can be understood that the two sides of the slider 6 are respectively connected to the force arms 7, the force arms 7 on the two sides extend outward beyond the two sides, the extending end of each force arm 7 is respectively connected to the end of a spring 8, and the other ends of the two springs 8 are respectively connected to the pressing plate 2, so as to adjust the pre-tightening value when the pressing plate 2 is pressed by force.

[0071] The lead screw 5 is arranged on the mounting frame 4, and the knob 50 is fixedly connected to the lead screw 5. A person can operate the knob 50 to drive the lead screw 5 to rotate, so that the slider 6 can move linearly on the lead screw 5, and simultaneously drive the pair of force arms 7 to adjust the stretching length of the pair of springs 8 at the same time, realizing the adjustment of the pre-tightening value of the two stressed pressing plates 2 at the same time.

[0072] For the specific structure of the driving mechanism, in other embodiments (not shown in the figures), a structure of a gear and a movable shaft may also be adopted. The slider 6 is arranged on the movable shaft, and the knob 50 drives the gear to rotate to drive the movable shaft and the slider 6 thereon to move linearly. Or, any other driving structure that can drive the slider 6 to move linearly is acceptable, and no specific limitation is made here.

[0073] In this embodiment, as Figure 3 shown, the lead screw 5 is centrally arranged between a pair of springs 8 and extends parallel to the pair of springs 8 in the same direction. Among them, the lead screw 5 can preferably be arranged on the central axis S of the frame 1, and the two springs 8 are symmetrically arranged on both sides of the lead screw 5 and extend parallel to the lead screw 5.

[0074] Please refer to Figure 3 , the adjusting mechanism further includes a pair of first fixing plates 41 arranged symmetrically, and the pair of first fixing plates 41 extend horizontally outward from both sides of the mounting bracket 4. In this embodiment, the pair of first fixing plates 41 can be fixed to the mounting bracket 4, bent upward from both sides of the mounting bracket 4, and then extended horizontally outward to lift the two force arms 7 at the same time.

[0075] One end of each of the two force arms 7 is movably connected to the slider 6, and the other end of each of the two force arms 7 is respectively connected to the end of a spring 8. The extending ends of the above-mentioned first fixing plates 41 are connected to the part between the two ends of the force arm 7 through a rotating shaft. Among them, the "part between the two ends of the force arm 7" can be the central part of the overall length of the force arm 7 or on the force arm 7 near any end of the force arm 7, and can be specifically set according to the use requirements, and no specific limitation is made here.

[0076] Compared with the prior art, the motion assistance device provided by the embodiment of the present application uses a driving mechanism to drive the slider 6 to move linearly, and at the same time drives a pair of force arms 7 connected to the slider 6 to stretch the springs respectively, infinitely changing the length of the springs 8, realizing the simultaneous adjustment of the two force arms 7, making the stretched lengths of the two springs 8 unified, and further making the pre-tension of the force-bearing pressing plates 2 respectively connected by the two springs 8 balanced, effectively ensuring the unity of the pre-tightening values of the two force-bearing pressing plates 2.

[0077] For the movable connection structure between the end of the force arm 7 and the slider 6, in this embodiment, please refer to Figure 3 and Figure 4 , the slider 6 can preferably be a ring body with internal threads. The slider 6 is sleeved on the lead screw 5 and can move on the lead screw 5 when the lead screw 5 is driven to rotate. Symmetrically arranged connecting rings 61 are respectively provided on both sides of the slider 6, and insertion shafts 71 for inserting into the connecting rings 61 are provided at the ends of the force arms 7 to realize the movable connection between the ends of the force arms 7 and the slider 6.

[0078] Among them, the connecting ring 61 can preferably be a linear ring body, and a linear hole is formed on the ring body, thereby increasing the moving space of the insertion shaft 71 at the end of the lever arm 7 within the connecting ring 61, which is beneficial to improving the flexibility of the movable connection between the end of the lever arm 7 and the slider 6.

[0079] In the second embodiment provided by the embodiment of the present application

[0080] Please refer to Figure 5 、 Figure 6 and Figure 7 together. The motion assistance device includes a frame 1, a pair of pressing plates 2, and an adjusting mechanism. Different from the above-mentioned first embodiment, the lead screw 5 is disposed in the middle between a pair of springs 8. The lead screw 5 can preferably be disposed on the central axis S of the frame 1, and the two springs 8 are respectively located on both sides of the lead screw 5.

[0081] In this embodiment, as Figure 7 shown, the adjusting mechanism further includes second fixing plates 42 extending outward from both sides of the mounting bracket 4. The two ends of the second fixing plate 42 are preferably provided with lugs 421 respectively for connecting to the ends of the lever arm 7, and the lugs 421 protrude upward to support the lever arm 7.

[0082] One end of the lever arm 7 is movably connected to the slider 6, and the other end of the lever arm 7 is rotationally connected to the lug 421 on the second fixing plate 42. The end portions of the respective springs 8 are respectively connected to a portion between the two ends of the corresponding lever arm 7. The "portion between the two ends of the lever arm 7" here can also be the central part of the overall length of the lever arm 7, or on the lever arm 7 close to any one end of the lever arm 7, and can be set according to the usage requirements.

[0083] Compared with the prior art, the motion assistance device provided by the embodiment of the present application also adopts the method of driving the slider 6 to move by the lead screw 5, while driving a pair of lever arms 7 to respectively stretch the springs 8, infinitely changing the length of the springs 8, realizing the simultaneous adjustment of the two lever arms 7, making the stretched lengths of the two springs 8 unified, and ensuring the unity of the pre-tightening values of the two force-bearing pressing plates 2.

[0084] Different from the above-mentioned first embodiment, the end portions of the two springs 8 are fixedly connected to the middle part of the lever arm 7, so that the two springs 8 do not extend onto the lever arm 7 in parallel, but the extending ends of the two springs 8 approach each other toward the lead screw 5, so that the two springs 8 are arranged in a "V-shaped" manner on the frame 1. In this way, the stretching limit of the two springs 8 is increased, the overall torque is increased, and the adjustment range is effectively enlarged.

[0085] In this embodiment, please refer to Figure 7 and Figure 8, the slider 6 can preferably be an annular body with internal threads. The slider 6 is sleeved on the lead screw 5 and can move on the lead screw 5 when the lead screw 5 is driven to rotate.

[0086] As Figure 8 shown, the slider 6 is provided with an upper connecting shaft 62 and a lower connecting shaft 63 which are symmetrically arranged up and down. The upper connecting shaft 62 extends upward on the slider 6, and the lower connecting shaft 63 extends downward on the slider 6.

[0087] Both ends of the pair of force arms 7 are provided with first long holes 72, and the first long holes 72 are respectively sleeved on the upper connecting shaft 62 of the slider 6. The mounting bracket 4 is also provided with a slide rail 43 below the lead screw 5. The slide rail 43 extends along the length direction of the lead screw 5, and the lower connecting shaft 63 on the slider 6 can be inserted into the slide rail 43.

[0088] In this way, when the lead screw 5 is driven to rotate, the slider 6 moves on the lead screw 5, and the upper connecting shaft 62 is used to synchronously drive the two force arms 7 to swing, adjusting the stretching lengths of the two springs 8. The lower connecting shaft 63 on the slider 6 moves on the slide rail 43. The lower connecting shaft 63 not only plays a role in supporting the slider 6, but also uses the slide rail 43 to limit the displacement stroke of the slider 6.

[0089] In the third embodiment provided by the embodiment of the present application

[0090] For the auxiliary devices for sit-up exercises on the market, the resilience is adjusted by the stretching value of the spring 8 to assist the fitness enthusiasts to sit up. However, since the magnitude of the force to be borne on this product is related to the elastic force value of the spring 8 inside the device, when adjusting to the high gear, the pre-tension of the spring 8 becomes larger, and the torque of the adjusting knob 50 also becomes larger, and more force needs to be applied by hand to adjust. It is not user-friendly for consumers with less strength, and there is a phenomenon that it cannot be adjusted, resulting in a decline in the consumer experience.

[0091] For this reason, please refer to Figure 9 , Figure 10 and Figure 11 , in this embodiment, the movement assistance device includes a frame 1, a pair of pressing plates 2 and an adjusting mechanism.

[0092] A pair of pressing plates 2 are respectively arranged on the frame 1 through hinge seats 3, and the pair of pressing plates 2 are used to bear external forces and move on the hinge seats 3 respectively.

[0093] As Figure 11 shown, the adjusting mechanism includes a mounting bracket 4, a driving mechanism, a pair of sliders 6, a pair of force arms 7, a pair of springs 8 and a pair of connecting shafts 9. The slider 6 is movably connected to the part between the two ends of the force arm 7, and the movable connection point is set as the rotation fulcrum P of the force arm 7.

[0094] Among them, the pair of pressing plates 2, the hinge seats 3 thereon, the pair of force arms 7, the pair of connecting shafts 9, and the pair of springs 8 are connected in a staggered manner, and the relationship of the staggered connection is set as follows: One of the pair of pressing plates 2 is arranged on a hinge seat 3 and connected to a connecting shaft 9. The other end of the connecting shaft 9 is connected to a force arm 7. The other end of the force arm 7 is connected to a spring 8. The other end of the spring 8 is connected to the hinge seat 3 on the other one of the pair of pressing plates 2.

[0095] It can be seen that after the connecting shaft 9 on one side of the pressing plate 2 is connected, the connecting shaft 9 will movably connect a force arm 7, and the force arm 7 is subsequently connected to a spring 8. The spring 8 is then fixedly connected to the hinge seat 3 of the other pressing plate 2, so that the connection relationship of the two groups of components is set in a staggered manner.

[0096] In addition, please refer to Figure 11 and Figure 12 as well. A pair of stroke grooves 44 for respectively restricting the displacement strokes of the respective sliders 6 are provided on the mounting bracket 4. The driving mechanism includes a lead screw 5 and a knob 50 provided on the lead screw 5. The pair of sliders 6 are both arranged on the lead screw 5 and respectively embedded in the stroke grooves 44 corresponding in position. In this embodiment, the two stroke grooves 44 are respectively opened on the mounting bracket 4, the two sliders 6 are both arranged on the lead screw 5, and at least part of the two sliders 6 is embedded in the stroke grooves 44 corresponding in position to them.

[0097] In this embodiment, the lead screw 5 is horizontally arranged on the frame 1. It can be understood here that, as Figure 11 shown, the length direction of the lead screw 5 is perpendicular to the central axis S of the frame 1. The knob 50 is fixedly connected to the lead screw 5, and a person can operate the knob 50 to drive the lead screw 5 to rotate, so that the pair of sliders 6 move simultaneously on the lead screw 5, approaching each other or moving away from each other, thereby simultaneously changing the position of the rotation fulcrum P on the pair of force arms 7.

[0098] Among them, the driving mechanism can also be other driving structures that can simultaneously drive the two sliders 6 to approach each other or separate from each other, and specific limitations are not made here.

[0099] Compared with the prior art, the motion assistance device provided by the embodiment of the present application utilizes the lever principle in the whole structure, and adjusts the stretchable length of the two springs 8 by changing the rotation fulcrum P on the force arm 7. In the movement of the pressing plate 2 being pressed by force, the connecting shaft 9 will pull the force arm 7 to rotate around the rotation fulcrum P, so that the force arm 7 swings within the stretchable range of the spring 8 on the other side. Thus, when a person operates the lead screw 5 through the knob 50 to drive the two sliders 6 to move, only the rotation fulcrum P on the force arm 7 is synchronously changed. Therefore, during the whole adjustment process, the force applied by the person's hand will not oppose the elastic force of the spring 8, making the adjustment more labor-saving and easier, being friendly to people with less strength, and effectively improving the use experience.

[0100] For the specific structure of the lead screw 5, in this embodiment, please refer to Figure 13 and Figure 14 , at least a part of the lead screw 5 is a non-threaded section 51, and a first threaded section 52 and a second threaded section 53 extend from both ends of the non-threaded section 51 towards both ends of the lead screw 5 respectively. The pair of sliders 6 are respectively arranged on the first threaded section 52 and the second threaded section 53.

[0101] Among them, the thread textures of the first threaded section 52 and the second threaded section 53 are arranged in the reverse direction, so that when the lead screw 5 is driven to rotate unidirectionally by the knob 50, the two sliders 6 can move closer to each other or move away from each other.

[0102] Preferably, as shown in Figure 14 , the non-threaded section 51 on the lead screw 5 is located on the midline S between the pair of stroke grooves 44. Since the two sliders 6 cannot move onto the non-threaded section 51 of the lead screw 5, a non-threaded section 51 is provided on the lead screw 5 to further define the approaching limit positions of the two sliders 6, and then the swing ranges of the two force arms 7 are set to avoid the two force arms 7 being prone to interference with each other during operation.

[0103] In this embodiment, please refer to Figure 12 , Figure 13 and Figure 14 , the mounting bracket 4 includes a bottom plate 45 and two side plates 46 erected on the bottom plate 45. Transversely arranged avoidance grooves 461 are provided on both side plates 46. Among them, the avoidance groove 461 can be a linear notch opened on one side of the side plate 46, and the avoidance groove 461 is preferably arranged parallel to the bottom plate 45.

[0104] A pair of force arms 7 can respectively extend into the avoidance grooves 461 of the two side plates 46 during swinging, thereby increasing the swinging amplitude of the force arms 7, which is beneficial to increasing the stretchable length of the spring 8.

[0105] In this way, during the movement of the entire lever principle structure, one end of the force arm 7 can be pulled by the pressing plate 2 on one side through the connecting shaft 9 during movement, and then the force arm 7 swings around the rotation fulcrum P, and the other end of the force arm 7 is pulled by the spring 8 on the other side to provide a pre-tension force.

[0106] For the mounting structure of the slider 6 and the stroke groove 44, in this embodiment, please refer to Figure 12 , Figure 13 and Figure 14 , the bottom plate 45 is provided with the pair of stroke grooves 44, and the pair of stroke grooves 44 are arranged in a staggered manner on the bottom plate 45. In this embodiment, as shown in Figure 14 , the two stroke grooves 44 can be arranged parallel to each other on both sides of the central axis S of the bottom plate 45, so as to form a staggered arrangement on the bottom plate 45.

[0107] Each of a pair of force arms 7 is respectively provided with a second long hole 73 corresponding to the position of the stroke groove 44. As Figure 12 shown, each of the two force arms 7 is provided with a second long hole 73, and the second long hole 73 corresponds to the position of the stroke groove 44 on the bottom plate 45 up and down respectively.

[0108] Please refer to Figure 12 and Figure 13 simultaneously. Each of the pair of sliders 6 includes a column 64 and a socket ring 65 for sleeving on the lead screw 5. The socket ring 65 has internal threads for being arranged on the lead screw 5 and can move on the lead screw 5 when the lead screw 5 rotates.

[0109] The column 64 is sequentially inserted through the second long hole 73 and the stroke groove 44. Among them, the column 64 is inserted through the second long hole 73 for serving as the rotation fulcrum P of the force arm 7. The column 64 is inserted through the stroke groove 44 for using the stroke groove 44 to limit the adjustable position of the rotation fulcrum P.

[0110] Preferably, please refer to Figure 11 , Figure 12 and Figure 13 simultaneously. The pair of force arms 7 are symmetrically arranged on the mounting frame 4, and both of the pair of force arms 7 are provided with bending portions 74 adjacent to the second long hole 73. The force arm 7 is formed into a deflection shaft similar to an L shape, which can not only enable the force arm 7 to be smoothly connected to the end of the spring 8 on the other side after deflection, but also increase the swing amplitude of the force arm 7.

[0111] For the movable connection structure between the connecting shaft 9 and the end of the force arm 7, in this embodiment, please refer to Figure 12 . A connecting ear 91 is provided at the end of the connecting shaft 9 for connecting with the force arm 7, and a third long hole 92 is provided on the connecting ear 91. Preferably, the length direction of the third long hole 92 is perpendicular to the connecting shaft 9.

[0112] An insertion shaft 71 is provided at the end of the force arm 7, and the insertion shaft 71 is inserted into the third long hole 92 of the connecting ear 91 described above, so that the end of the force arm 7 is movably connected to the end of the connecting shaft 9, thereby improving the movement flexibility.

[0113] Optimize the structure of the frame 1 in the above three embodiments

[0114] Please refer to Figure 4 . A reinforcing frame 11 is further provided on the motion assisting device. The reinforcing frame 11 is arranged on the frame 1, and the reinforcing frame 11 is fixedly connected to the hinge seats 3 and the mounting frames 4 mentioned in each embodiment respectively, thereby improving the connection strength of the internal components of the whole device and prolonging the service life of the whole machine.

[0115] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A motion assistance device, characterized in that, Comprising: Frame; A pair of pressing plates, which are respectively arranged on the frame through hinge seats, and the pair of pressing plates are used to bear external forces and move on the hinge seats; Adjusting mechanism, including a mounting frame, a driving mechanism, a slider, a pair of force arms and a pair of springs respectively connected to the pressing plates. The pair of force arms are symmetrically connected to the slider, and the extending ends of the pair of force arms are respectively connected to the pair of springs; The driving mechanism is arranged on the mounting frame and can drive the slider to move linearly while adjusting the stretching length of the pair of springs.

2. The motion assistance device according to claim 1, characterized in that: The driving mechanism includes a lead screw, the lead screw is arranged in the middle between the pair of springs and extends parallel to the pair of springs in the same direction; The adjusting mechanism further includes a pair of first fixing plates arranged symmetrically, and the pair of first fixing plates extend horizontally outward from both sides of the mounting frame; One end of the force arm is movably connected to the slider, the other end of the force arm is connected to the spring, and the extending end of the first fixing plate is rotatably connected to a part between the two ends of the force arm.

3. The motion assistance device according to claim 2, wherein: Symmetrically arranged connecting rings are respectively arranged on both sides of the slider, and inserting shafts for inserting into the connecting rings are arranged at the ends of the force arms.

4. The motion assistance device according to claim 1, wherein: The driving mechanism includes a lead screw, the lead screw is arranged in the middle between the pair of springs; The adjusting mechanism further includes second fixing plates extending outward from both sides of the mounting frame. One end of the force arm is movably connected to the slider, the other end of the force arm is rotatably connected to the extending end on the second fixing plate, and the end of the spring is connected to a part between the two ends of the force arm.

5. The motion assistance device according to claim 4, characterized in that: The slider is a ring body with internal threads, and upper connecting shafts and lower connecting shafts symmetrically arranged up and down are arranged on the slider; First long holes are arranged at the ends of the pair of force arms, and the upper connecting shafts are respectively sleeved on the upper connecting shafts through the first long holes; A slide rail is arranged on the mounting frame below the lead screw, and the lower connecting shaft on the slider is inserted into the slide rail.

6. A motion assistance device, characterized in that, Comprising: Frame; A pair of pressing plates, which are respectively arranged on the frame through hinge seats, and the pair of pressing plates are used to bear external forces and move on the hinge seats; Adjusting mechanism, including a mounting frame, a driving mechanism, a pair of sliders, a pair of force arms, a pair of springs and a pair of connecting shafts. The slider is movably connected to a part between the two ends of the force arm, and the movable connection point is set as the rotation fulcrum of the force arm; Wherein, the pair of pressing plates and the hinge seats thereon, the pair of force arms, the pair of connecting shafts and the pair of springs are connected in a staggered manner, and the relationship of the staggered connection is set as: One of the pair of pressing plates is arranged on one of the hinge seats and is connected to one of the connecting shafts, the other end of the connecting shaft is connected to one of the force arms, the other end of the force arm is connected to one of the springs, and the other end of the spring is connected to the hinge seat on the other of the pair of pressing plates; A pair of stroke grooves for respectively limiting the displacement strokes of the respective sliders are arranged on the mounting frame, and the pair of sliders are respectively embedded in the stroke grooves corresponding in position; The driving mechanism is arranged on the mounting bracket and can drive the pair of sliders to move linearly synchronously, so that the pair of sliders approach or move away from each other, thereby changing the positions of the rotation fulcrums on the pair of force arms simultaneously.

7. The motion assistance device according to claim 6, wherein: The mounting bracket includes a bottom plate, and a pair of the stroke grooves are formed on the bottom plate, and the pair of stroke grooves are arranged on the bottom plate in a staggered manner; each of the pair of force arms has a second long hole corresponding to the position of the stroke groove; the driving mechanism includes a lead screw, and each of the pair of sliders includes a column and a socket ring for sleeving on the lead screw, and the column is sequentially inserted through the second long hole and the stroke groove.

8. The motion assistance device according to claim 7, wherein: At least a part of the lead screw is a non-threaded section, and a first threaded section and a second threaded section extend from both ends of the non-threaded section to both ends of the lead screw respectively, and the thread textures of the first threaded section and the second threaded section are arranged in opposite directions, and the pair of sliders are respectively arranged on the first threaded section and the second threaded section.

9. The exercise assistance device according to claim 7, characterized in that: The pair of force arms are symmetrically arranged on the mounting bracket, and each of the pair of force arms has a bending part adjacent to the second long hole.

10. The motion assistance device according to claim 6, characterized in that: The mounting bracket further includes side vertical plates, and both of the side vertical plates have horizontally arranged avoidance grooves; the pair of force arms can respectively extend into the avoidance grooves of the two side vertical plates during swinging.

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