Amplitude-adjustable rhythm machine and sitting and lying tool

Abstract

The amplitude-adjustable rhythm machine comprises a base, a rhythm seat and a rhythm driving mechanism, and the rhythm driving mechanism comprises an eccentric rotor and a deflection sleeve arranged on the eccentric rotor in a sleeving mode; the rhythm machine further comprises an amplitude adjusting mechanism, and the amplitude adjusting mechanism comprises a telescopic push rod which is suitable for outputting telescopic motion; one end part of the adjusting connecting rod is pivotally connected with the deflection sleeve, and the other end part of the adjusting connecting rod is in transmission connection with the telescopic push rod through a buffer device; the buffer device comprises a buffer seat which is fixedly connected to the base; the buffer lever is positioned on the buffer seat, one end part of the buffer lever is pivotally connected with the telescopic push rod, and the other end part of the buffer lever is pivotally connected with the adjusting connecting rod; instantaneous impact force applied to the adjusting connecting rod in the swinging process of the deflection sleeve can be resisted by the buffer seat and the buffer lever, so that impact on the telescopic push rod is reduced. According to the rhythm machine with the adjustable amplitude and the sitting and lying tool, the rhythm amplitude can be accurately, stably and efficiently adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rhythm machines, and more particularly, to a rhythm machine with adjustable amplitude and a sitting and lying device. BACKGROUND

[0002] In the fields of modern furniture, rehabilitation devices and sports equipment, rhythm machines are widely used in products such as massage beds, rehabilitation training platforms and fitness equipment. However, most of the existing rhythm machines lack amplitude adjustment capability. Traditional devices can only provide fixed amplitude rhythm and cannot be flexibly and accurately adjusted according to different physical conditions of users and use requirements (such as rehabilitation stages, massage intensity preferences, etc.), which limits the application range and personalized experience of the device. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a rhythm machine with adjustable amplitude and a sitting and lying device, which can accurately, stably and efficiently adjust the amplitude of the rhythm.

[0004] To achieve the above-mentioned purpose, in a first aspect, the present application provides a rhythm machine with adjustable amplitude, comprising a base, a rhythm seat and a rhythm driving mechanism, the rhythm driving mechanism comprising an eccentric rotor and a swing sleeve sleeved on the eccentric rotor, the swing sleeve being movably connected to the rhythm seat to drive the rhythm seat to reciprocatingly rhythm in a set direction; the rhythm machine further comprises an amplitude adjustment mechanism, the amplitude adjustment mechanism comprising: a telescopic push rod adapted to output telescopic motion; and an adjustment link, one end of which is pivotally connected to the swing sleeve, and the other end of which is drivingly connected to the telescopic push rod through a buffer device; in response to the telescopic motion of the telescopic push rod, the adjustment link can adjust the rhythm amplitude of the rhythm seat by changing the initial angle between the swing sleeve and the set direction; wherein the buffer device comprises: a buffer seat fixed to the base; and a buffer lever positioned on the buffer seat in a pivotable manner around a set axis, one end of the buffer lever being pivotally connected to the telescopic push rod, and the other end of the buffer lever being pivotally connected to the adjustment link; wherein the instantaneous impact force applied to the adjustment link during the swing of the swing sleeve can be resisted by the buffer seat and the buffer lever to reduce the impact on the telescopic push rod.

[0005] Through the above technical solution, the power of the telescopic push rod is converted into the angle adjustment of the swing sleeve by using the lever transmission principle combined with the adjustment link, the linear precise adjustment of the amplitude is realized through the geometric relationship of the mechanical structure, the response speed and precision of the amplitude adjustment are ensured, and the mechanical transmission structure has higher stability and anti-interference ability.

[0006] During the swing movement of the swing sleeve, the end of the swing sleeve connected to the adjusting link will have a movement impact. If the telescopic push rod is directly connected to the adjusting link, the impact of the swing sleeve will be transmitted to the telescopic push rod through the adjusting link, which will cause damage to the telescopic push rod or affect the service life of the telescopic push rod. The buffer device is arranged between the telescopic push rod and the adjusting link, which can adjust the initial deflection angle of the swing sleeve. The fulcrum shaft of the buffer lever can also bear part of the impact of the swing sleeve, reducing the impact of the first end of the buffer lever on the telescopic push rod.

[0007] In combination with the first aspect, in a further technical solution, the initial included angle refers to an included angle between the swing sleeve and a set direction at the start of the swing.

[0008] In combination with the first aspect, in a further technical solution, the set direction is a rhythm direction of the rhythm seat.

[0009] In combination with the first aspect, in a further technical solution, an included angle between the adjusting link and the buffer lever is an acute angle, so that the instantaneous impact force can be resisted by the buffer seat.

[0010] In combination with the first aspect, in a further technical solution, an included angle between the buffer lever and the telescopic push rod is also an acute angle, so as to reduce the impact force of the buffer lever on the telescopic push rod.

[0011] In combination with the first aspect, in a further technical solution, the buffer lever is rotatably positioned on the buffer seat through a pivot shaft, and the instantaneous impact force applied to the buffer lever can be resisted by the pivot shaft.

[0012] In combination with the first aspect, in a further technical solution, both ends of the pivot shaft are positioned on the buffer seat, and the structure is more stable.

[0013] In combination with the first aspect, in a further technical solution, the eccentric rotor is configured as an eccentric wheel fixed to a rotating shaft or an eccentric shaft attached to a rotating shaft.

[0014] In combination with the first aspect, in a further technical solution, the swing sleeve has: a movable fitting part fitted on the eccentric rotor; a swing rod extending from the movable fitting part to the side of the rhythm seat, the swing rod and the rhythm seat being movably hinged; and an actuating part extending from the movable fitting part to the side of the buffer lever, the actuating part and the buffer lever being movably hinged.

[0015] In combination with the first aspect, in a further technical solution, the buffer lever and the adjusting link are configured to rotate the buffer lever around a first pivot axis and the telescopic push rod around a second pivot axis, a distance between the setting axis and the first pivot axis is defined as H1, and a distance between the setting axis and the second pivot axis is defined as H2, where H1≥H2, so as to reduce the impact of the buffer lever on the telescopic push rod.

[0016] In combination with the first aspect, in a further technical solution, the amplitude adjusting mechanism further comprises an amplitude detection assembly, the amplitude detection assembly comprises an optical encoder or a grating sensor, the optical encoder is connected with a hinge shaft at one end of the adjusting link to detect a rotation angle thereof, and the grating sensor is arranged on a stroke path of the hinge shaft at one end of the adjusting link to detect a displacement amount thereof.

[0017] Through the above technical solution, the amplitude detection assembly provides real-time position feedback data, and provides reliable data support for amplitude adjustment. In combination with the controller, a closed-loop control system can be formed to realize a dynamic calibration process of "detection-adjustment-re-detection", solve the amplitude drift problem caused by mechanical wear or load change in open-loop adjustment, and further improve the adjustment accuracy.

[0018] In combination with the first aspect, in a further technical solution, the grating sensor comprises an indicating grating fixedly connected with the adjusting link, a scale grating fixedly connected with the base, a light source and a photoelectric element, the indicating grating is arranged opposite to the scale grating and has a preset included angle with the scale grating, and the photoelectric element outputs displacement data of the adjusting link by detecting a Moire fringe signal generated by relative movement of the indicating grating and the scale grating.

[0019] Through the above technical solution, the grating sensor can accurately detect the displacement amount of the adjusting link by using the Moire fringe principle, has high measurement accuracy and resolution, provides high-precision displacement data for amplitude adjustment, and further improves the performance and reliability of the rhythm machine.

[0020] In combination with the first aspect, in a further technical solution, the optical encoder comprises an amplitude code disc and photoelectric sensors arranged on both sides of the amplitude code disc, the amplitude code disc is fixed on a rotating shaft connected between the adjusting link and the buffer lever, and when the amplitude code disc rotates with the buffer lever, the photoelectric sensors sense and output corresponding pulse signals.

[0021] Through the above technical solution, the optical encoder directly detects the rotation angle of the buffer lever, and through counting and frequency analysis of the pulse signals, the displacement amount and the adjusting speed of the adjusting link can be calculated in real time, real-time dynamic parameters are provided for the control system, and rapid and accurate adjustment of the amplitude is facilitated.

[0022] With the first aspect, further technical solutions, the rhythm driving mechanism comprises a driving member and a position detection assembly electrically connected thereto, the position detection assembly is used to detect the rotation angle of the output shaft of the driving member and generate a feedback signal to the controller.

[0023] Through the above technical solutions, the position detection assembly can monitor the rotation angle of the output shaft of the driving member in real time, and send the feedback signal to the controller, so that the controller can accurately control the driving member according to the actual position information, thereby ensuring the stable operation of the rhythm driving mechanism and the accurate rhythm of the rhythm seat, and improving the control accuracy and reliability of the entire rhythm machine.

[0024] With the first aspect, further technical solutions, the position detection assembly is a rotary encoder, the rotary encoder comprises an angle code disc fixed coaxially with the output shaft of the driving member and a photoelectric sensor, when the angle code disc rotates with the output shaft, the photoelectric sensor determines the absolute angular position of the output shaft according to the feedback signal.

[0025] Through the above technical solutions, the rotary encoder can accurately determine the absolute angular position of the output shaft, avoiding the cumulative error problem of incremental encoder, ensuring the position consistency of the driving member each time it starts, providing a reliable basis for accurate control of the driving member, further improving the operation stability of the rhythm machine and the accuracy of amplitude adjustment, especially suitable for high-frequency rhythm scenes that require repeated positioning.

[0026] With the first aspect, further technical solutions, the force arm length of the output end is 1.5-2.5 times, preferably 2 times, of the force arm length of the actuating part, with the deflection center of the deflection sleeve as the fulcrum, wherein the output end is the connecting end of the deflection sleeve and the rhythm seat, and the actuating part is the connecting end of the deflection sleeve and the adjustment connecting rod.

[0027] Through the above technical solutions, the force arm length ratio of the driving end and the actuating part is reasonably set, so that appropriate force balance and motion conversion effect can be obtained when adjusting the amplitude, which can ensure the convenience and flexibility of the adjustment operation, and also ensure the driving effect of the deflection sleeve on the rhythm seat, thereby improving the adjustment performance and working efficiency of the rhythm machine.

[0028] With the first aspect, further technical solutions, the angle between the force arm of the deflection rod and the force arm of the actuating part is 130°-150°, preferably 140°, with the center of the movable fitting part as the fulcrum.

[0029] By the technical scheme, the specific included angle is arranged to form reasonable force vector decomposition between the pulsation direction of the output end and the force direction of the actuating part, reduce the orthogonal component loss of the force, ensure that the adjusting torque is mainly used for changing the amplitude instead of generating invalid component force, improve the adjusting efficiency, enable the eccentricity sleeve to more effectively transmit the power of the telescopic push rod to the pulsation seat when adjusting the amplitude, and thus more accurate and stable amplitude adjustment is achieved, and the performance and reliability of the pulsation machine are further improved.

[0030] In combination with the first aspect, in a further technical scheme, the eccentric rotor is coaxially fixedly connected with a worm, the eccentricity sleeve is eccentrically connected with a worm wheel, the axes of the worm wheel and the worm are arranged in staggered perpendicularity, and the worm and the worm wheel are in meshing transmission.

[0031] By the technical scheme, the worm and worm wheel transmission has large transmission ratio, self-locking property and low noise characteristics, can convert the high-speed rotation of the driving member into low-speed stable rotation of the eccentric rotor, lock the eccentric position when power is off, prevent the amplitude from being changed accidentally, and improve the safety; meanwhile, the worm and worm wheel transmission has high transmission accuracy and stability, and is beneficial to ensuring the smooth pulsation of the pulsation seat. In addition, the driving shaft and the eccentric rotor axis are arranged in staggered perpendicularity, so that the layout of the entire pulsation driving mechanism is more compact and reasonable, and space is saved.

[0032] In combination with the first aspect, in a further technical scheme, the eccentricity sleeve further comprises a bearing, the bearing is arranged in the circular groove of the swing rod, the bearing is sleeved on the outside of the eccentric wheel, and the eccentric wheel is connected with the side wall of the groove to form a cam pair connection through the bearing.

[0033] By the technical scheme, the arrangement of the bearing reduces the friction resistance between the eccentric wheel and the side wall of the groove, improves the stability and reliability of movement, prolongs the service life of the eccentric rotor and the eccentricity sleeve, and also helps to improve the overall performance and operating efficiency of the pulsation machine.

[0034] In a second aspect, the application provides a sitting and lying tool, comprising the adjustable-amplitude pulsation machine of the first aspect, and the pulsation seat is fixedly connected with a bearing part of the sitting and lying tool to drive the bearing part to reciprocatingly pulsate.

[0035] By the technical scheme, the adjustable-amplitude pulsation machine is integrated into the sitting and lying tool, the pulsation amplitude can be flexibly adjusted according to the body type, health status or use scene (such as rehabilitation training or relaxation massage) of a user, individualized physiotherapy or comfortable experience is achieved, and the application scene of the device is widened.

[0036] In summary, the application has at least one of the following beneficial technical effects: 1. Accurate, stable and efficient adjustment of pulsation amplitude is achieved, individualized needs of different users for the amplitude in various scenes are met, and the use experience and comfort of the user are improved.

[0037] 2、Through the unique amplitude adjustment mechanism design, including the coordinated action of telescopic push rod, buffer lever, adjustment connecting rod and amplitude detection assembly, etc., the accuracy and reliability of amplitude adjustment are ensured, the control precision and automation degree of the whole rhythm machine are improved, the intelligent control is facilitated, and the service life of the telescopic push rod is also improved.

[0038] 3、The rhythm driving mechanism adopts the combination mode of eccentric rotor and eccentric sleeve, and introduces worm and worm gear transmission and the like structure, so that the rhythm of the rhythm seat is more stable and efficient, has a larger amplitude adjustment range, and optimizes the layout and force arm length, included angle and the like parameters of each component, and further improves the performance and operation efficiency of the device.

[0039] 4、The sitting and lying appliance in the application integrates the rhythm machine with adjustable amplitude, can provide a comfortable and dynamic sitting and lying environment for users, helps to relieve fatigue, promote blood circulation and the like, has significant advantages compared with the traditional fixed state sitting and lying appliance, can be widely applied to various fields such as home, office, medical care and the like, and has high practical value and market prospect. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only the embodiments of the application, and for those skilled in the art, without creative labor, can also obtain other drawings according to the provided drawings.

[0041] Figure 1 It is a three-dimensional structure schematic diagram of the adjustable amplitude rhythm machine of the application; Figure 2 It is a top view of the adjustable amplitude rhythm machine of the application; Figure 3 It is an exploded structure schematic diagram of the amplitude detection assembly of the adjustable amplitude rhythm machine of the application; Figure 4 It is a structure schematic diagram of the adjustable amplitude rhythm machine after removing the amplitude detection assembly of the application; Figure 5 It is a top view of the internal connection structure of the adjustable amplitude rhythm machine of the application; Figure 6 It is an exploded structure schematic diagram of the eccentric sleeve of the adjustable amplitude rhythm machine of the application; Figure 7 It is Figure 6 It is an enlarged structure schematic diagram of area A in the application; Figure 8 It is a connection structure schematic diagram of the adjustable amplitude rhythm machine of the application in a small amplitude state; Figure 9 Amplitude position comparison schematic diagram of small amplitude state of the adjustable amplitude pulsator of the present application; Figure 10 Connection structure schematic diagram of large amplitude state of the adjustable amplitude pulsator of the present application; Figure 11 Amplitude position comparison schematic diagram of large amplitude state of the adjustable amplitude pulsator of the present application.

[0042] Reference signs: 1, base; 2, motor; 21, worm gear; 211, drive shaft; 22, output shaft; 23, eccentric wheel; 3, pulsator base; 4, swing sleeve; 41, output end; 42, connecting rod; 43, actuating part; 44, bearing; 45, swing rod; 5, adjusting connecting rod; 51, rotating shaft; 6, buffer lever; 61, pivot; 7, telescopic push rod; 8, amplitude detection assembly; 81, buffer seat; 82, amplitude encoder disc; 83, photoelectric sensor; 84, reinforcing plate; 9, position detection assembly; 91, angle encoder disc; 92, photoelectric sensor; L, pulsation amplitude. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In the description of the present application, it should be understood that the terms "up", "down", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0046] The technical solutions of the present application will be described in detail below in combination with the drawings, and the features in the following embodiments can be combined with each other without conflict.

[0047] Embodiment 1: Please refer to Figures 1-11 The embodiment provides a beat machine with adjustable amplitude, which comprises a base 1, a beat base 3, a beat driving mechanism, an amplitude adjusting mechanism and an amplitude detecting assembly 8.

[0048] The beat driving mechanism comprises a motor 2 and a swing sleeve 4 sleeved on the eccentric wheel 23, and the swing sleeve 4 is movably connected with the beat base 3 to drive the beat base 3 to reciprocatingly beat in a set direction; characterized in that the beat machine further comprises an amplitude adjusting mechanism, the amplitude adjusting mechanism comprises a telescopic push rod 7 and an adjusting connecting rod 5. The telescopic push rod 7 is suitable for outputting telescopic motion, one end of the adjusting connecting rod 5 is pivotally connected with the swing sleeve 4, and the other end of the adjusting connecting rod 5 is drivingly connected with the telescopic push rod 7 through a buffer device and responds to the telescopic motion of the telescopic push rod 7. The adjusting connecting rod 5 can adjust the beat amplitude of the beat base 3 by changing the initial angle between the swing sleeve 4 and the set direction, the set direction is the beat direction of the beat base 3, and the initial angle refers to the angle between the swing sleeve 4 and the set direction at the beginning of swing.

[0049] The buffer device comprises a buffer seat 81 fixed to the base 1 and a buffer lever 6. The buffer lever 6 is pivotally positioned on the buffer seat 81 about a set axis, one end of the buffer lever 6 is pivotally connected with the telescopic push rod 7, and the other end of the buffer lever 6 is pivotally connected with the adjusting connecting rod 5.

[0050] The instantaneous impact force applied to the adjusting connecting rod 5 during the swing of the swing sleeve 4 can be resisted by the buffer seat 81 and the buffer lever 6, so as to reduce the impact on the telescopic push rod 7.

[0051] In the embodiment, preferably, the angle between the adjusting connecting rod 5 and the buffer lever 6 is an acute angle, so that the instantaneous impact force can be resisted by the buffer seat 81. The angle between the buffer lever 6 and the telescopic push rod 7 is also an acute angle, so as to reduce the impact force of the buffer lever 6 on the telescopic push rod 7. The buffer lever 6 is rotatably positioned on the buffer seat 81 through a pivot 61, the instantaneous impact force applied to the buffer lever 6 can be resisted by the pivot 61, and both ends of the pivot 61 are positioned on the buffer seat 81.

[0052] The beat driving mechanism comprises a motor 2 and a swing sleeve 4 sleeved on the motor 2, and the beat output end 41 of the swing sleeve 4 is rotatably connected with the beat base 3 through a connecting rod 42, and the beat base 3 is slidingly connected with the base 1 in the beat direction.

[0053] Please refer to Figure 1 and Figure 2, the amplitude adjusting mechanism comprises a telescopic push rod 7, a buffer lever 6 and an adjusting link 5. The telescopic push rod 7 is an electric push rod, and can also be a linear motor. In the embodiment, the telescopic push rod 7 is an electric push rod. The motor of the electric push rod drives a pair of screw nuts after being decelerated by a gear or a worm gear. The rotating motion of the motor is converted into linear motion, and the linear motion of the push rod is completed by the forward and reverse rotation of the motor. The buffer lever 6 is driven to rotate by the linear motion of the push rod. The middle part of the buffer lever 6 is hinged to the base 1 through a pivot 61. The first end of the buffer lever 6 is in transmission connection with the output shaft 22 of the telescopic push rod 7, and the second end is pivotally connected with one end of the adjusting link 5. The other end of the adjusting link 5 is pivotally connected with the actuating part 43 of the deflection sleeve 4. When the buffer lever 6 rotates, the difference between the rotation angles of the two ends of the adjusting link 5 is less than 5°, and in the embodiment, the difference is controlled to be within 2°. The telescopic push rod 7 can adjust the initial deflection angle of the deflection sleeve 4 through the buffer lever 6 and the adjusting link 5, and further change the amplitude of the rhythm seat 3 in the rhythm direction. Because the telescopic push rod 7 is in linear motion and the buffer lever 6 is in circular motion, the transmission connection between the buffer lever 6 and the output shaft 22 of the telescopic push rod 7 is in shaft connection in the embodiment. The gap between the shaft and the buffer lever 6 or the output shaft 22 of the telescopic push rod 7 is matched, so that relative rotation and small-range relative movement can be realized, thereby reducing the jamming phenomenon in the transmission process. The deflection angle is the included angle between the force arm of the output end 41 and the rhythm direction.

[0054] Please refer to Figure 3 , the amplitude detection assembly 8 comprises a buffer seat 81, a reinforcing plate and a photoelectric encoder. The buffer seat 81 is fixedly connected with the base 1, and the reinforcing plate 84 is fixedly connected with the buffer seat 81. The photoelectric encoder comprises an amplitude code disc 82 and a photoelectric sensor 83. The amplitude code disc 82 is fixed on the rotating shaft 51 connected with the adjusting link 5 and the buffer lever 6. The photoelectric sensor 83 is fixed on the buffer seat 81, and detects the rotation angle in real time and outputs a pulse signal to the controller. The reinforcing plate 84 and the buffer seat 81 are provided with a sliding groove. The rotating shaft 51 passes through the sliding groove and is fixedly connected with the amplitude code disc 82. The curvature of the sliding groove is adapted to the rotation track of the rotating shaft 51, and the rotating shaft 51 can slide in the sliding groove.

[0055] Please refer to Figures 4-6, the middle part of the buffer lever 6 is hinged to the base 1 through a pivot 61, the axis of the pivot 61 is parallel to the rotation axis of the motor 2, the second end (far from the end connected with the telescopic push rod 7) of the buffer lever 6 is hinged to one end of the adjusting connecting rod 5, the other end of the adjusting connecting rod 5 is hinged to the actuating part 43 of the swing sleeve 4, wherein when the telescopic push rod 7 drives the buffer lever 6 to rotate around the pivot 61, the two ends of the adjusting connecting rod 5 rotate synchronously, and the rotation angles are basically the same. In actual design, the rotation angle difference between the two ends of the adjusting connecting rod 5 is as small as possible, and the rotation angle difference between the two ends of the adjusting connecting rod 5 is less than 5° when the buffer lever 6 rotates, and is preferably less than 2°. Therefore, during the working process in the rhythm amplitude adjustment range, the included angle between the buffer lever 6 and the adjusting connecting rod 5 and the included angle between the adjusting connecting rod 5 and the force arm of the actuating part 43 are changed around 90°, and are most preferably 80°-100°.

[0056] Preferably, the buffer lever 6 forms an equal-arm or approximate equal-arm lever structure with the pivot as the fulcrum, so that the motion trajectories of the two ends of the adjusting connecting rod 5 are kept synchronous, the force and torque deviations in the transmission process are reduced, the driving of the telescopic push rod 7 to the buffer lever 6 and the driving of the adjusting connecting rod 5 to the swing sleeve 4 are synchronized, and the angle changes of the buffer lever 6 and the swing sleeve 4 are approximately the same, thereby improving the precision and controllability of the amplitude adjustment.

[0057] Through the size and connection structure design of the buffer lever 6 and the adjusting connecting rod 5, the rotation angle difference between the two ends of the adjusting connecting rod 5 is limited within the design range, the transmission error can be controlled within a very small range, the swing sleeve is prevented from tilting or being stuck due to the angle deviation, the linearity and repeatability of the amplitude adjustment are ensured, and the high-precision adjustment requirement is met.

[0058] Please refer to Figure 6 , the output shaft 22 of the motor 2 is fixedly connected with a worm, the worm is engaged with a worm gear 21, the axes of the worm gear 21 and the worm are arranged in a staggered and perpendicular manner, the worm gear 21 is fixedly connected with a driving shaft 211, and the driving shaft 211 is fixedly connected with an eccentric wheel 23 through a pin. The swing sleeve 4 comprises a bearing 44 and a swing rod 45, the swing rod 45 is provided with a circular groove, the bearing 44 is arranged in the circular groove of the swing rod 45, and the eccentric wheel 23 is located in the bearing 44 and connected with the side wall of the groove to form a cam pair. The bearing 44 can be a sliding bearing or a rolling bearing, the eccentric wheel 23 and the groove of the cam pair adopt a self-lubricating bearing to reduce the friction loss. In actual application, the cam pair can also be directly formed by the eccentric wheel 23 and the side wall of the groove.

[0059] The dotted line inside the bearing 44 is the center of the eccentric sleeve 4, and the dotted line next to it is the rotation axis of the drive shaft 211. The center of the eccentric sleeve 4 is the geometric center of the eccentric sleeve 4, and the shaft of the bearing 44 and the recess fitting part of the eccentric rod 45. The length of the force arm of the eccentric rod 45 is 1.5-2.5 times the length of the force arm of the actuator 43, preferably 2 times, and the angle between the force arm of the eccentric rod 45 and the force arm of the actuator 43 is 130°-150°, preferably 140°. The output end 41 is the connection end of the pivot connection between the eccentric sleeve 4 and the pivot connection between the actuator 43 and the adjustment connecting rod 5.

[0060] In specific implementation, according to different assembly requirements, the worm and worm gear 21 transmission can be replaced by gear transmission, such as bevel gear, helical gear and double curved surface gear transmission. The output shaft 22 of the motor 2 is coaxially fixedly connected with the driving gear, and the eccentric sleeve 4 is eccentrically connected with the driven gear, and the two shafts are arranged in parallel or at an angle.

[0061] Please refer to Figure 6 and Figure 7 , in order to realize the accurate monitoring of the sliding position of the actuator 3, the actuator driving mechanism further comprises a position detection assembly 9, which adopts a rotary encoder. The rotary encoder comprises an angle code disc 91 and a photoelectric sensor 92. The angle code disc 91 is coaxially fixed with the output shaft 22 of the motor 2, and the photoelectric sensor 92 is fixed with the base 1 and is used for detecting the absolute angle position and feeding back to the controller. When the angle code disc 91 rotates with the output shaft 22, the photoelectric sensor 92 determines the absolute angle position of the output shaft 22 according to the feedback signal. The controller can obtain the real-time position of the actuator 3 through the feedback signal, and can better control the actuator, such as controlling the reset of the actuator 3.

[0062] Please refer to Figure 8 and Figure 9 , the telescopic push rod 7 drives the buffer lever 6 to rotate clockwise in the direction shown in the figure, and the buffer lever 6 drives the eccentric rod 45 to rotate counterclockwise through the adjustment connecting rod 5. The angle between the force arm axis of the eccentric rod 45 and the connecting rod 42 increases, and the dotted line in the figure is the force arm axis. When the motor 2 drives the eccentric rod 45 to eccentrically swing, as shown in Figure 9 , the eccentric rod 45 drives the actuator 3 to move in the actuator direction, and the actuator amplitude L of the displacement component is relatively small.

[0063] Please refer to Figure 10 and Figure 11, the telescopic push rod 7 drives the buffer lever 6 to rotate counterclockwise in the direction shown in the figure, the buffer lever 6 drives the deflection lever 45 to rotate clockwise through the adjusting link 5, the included angle between the deflection lever 45 and the force arm axis of the connecting rod 42 decreases, and the dotted line in the figure is the force arm axis. When the motor 2 drives the deflection lever 45 to eccentrically swing, as shown in Figure 11 the deflection lever 45 drives the rhythm seat 3 to have a relatively large rhythm amplitude L of the displacement component in the rhythm direction through the connecting rod 42.

[0064] The initial angle of the deflection sleeve 4 determines the displacement component of the eccentric motion. If the included angle between the deflection lever 45 and the connecting rod 42 increases, the sliding component of the rhythm seat 3 in the rhythm direction when the eccentric wheel 23 rotates decreases. If the included angle between the deflection lever 45 and the connecting rod 42 decreases, the sliding component of the rhythm seat 3 in the rhythm direction when the eccentric wheel 23 rotates increases. The driving amount of the telescopic push rod 7 is controlled by the controller, the telescopic push rod 7 drives the buffer lever 6 and the adjusting link 5 to rotate, and the deflection lever 45 is rotated, so that the change of the rhythm amplitude is realized.

[0065] Working principle: the motor 2 drives the eccentric wheel 23 to rotate through the worm gear mechanism of the worm wheel 21, the eccentric wheel 23 drives the deflection sleeve 4 to swing, and the deflection lever 45 swings and drives the rhythm seat 3 to reciprocally slide relative to the base 1 to realize rhythm through the connecting rod 42. The telescopic push rod 7 drives the buffer lever 6 to rotate around the pivot 61, drives the deflection lever 45 to rotate through the adjusting link 5, changes the initial angle of the deflection lever 45 relative to the rhythm seat 3, and adjusts the sliding amplitude of the rhythm seat 3. The controller dynamically adjusts the output of the telescopic push rod 7 according to the feedback signals of the optical encoder and the rotary encoder, and forms a closed-loop control system.

[0066] Embodiment 2 In this embodiment, the amplitude detection assembly 8 is replaced by a grating sensor based on the embodiment 1. The grating sensor includes an indicating grating fixedly connected with the adjusting link 5, a scale grating fixedly connected with the base 1, a light source, and a photoelectric element. The indicating grating and the scale grating are oppositely arranged and have a preset included angle in the direction of the lines. The lines of the two have an included angle of 5°. The light source emits light through the grating, and the photoelectric element detects the Moire fringe signal. The displacement amount of the adjusting link 5 is calculated through a signal processing circuit, and the resolution can reach 0.1 μm.

[0067] Technical effect: the introduction of the grating sensor improves the amplitude adjustment accuracy to ±0.05 mm, and is suitable for high-precision scenes such as medical rehabilitation equipment.

[0068] Embodiment 3 The embodiment provides a sitting and lying tool integrated with a pulsation machine, in particular, a massage bed or a massage chair. Taking the massage chair as an example, the pulsation seat 3 is fixedly connected with a bearing part (including a chair back, a seat cushion and a leg support) of the massage chair, and the bearing part is driven to reciprocate. The extension push rod 7 of the amplitude adjusting mechanism and the controller are integrated in the massage chair base, the extension push rod 7 is actuated by issuing an instruction through the controller, and the size of the pulsation amplitude is determined through the signal transmitted by the amplitude detection assembly 8, the amplitude range can be set to 5-50 mm, and the amplitude adjusting range in the embodiment is 10-30 mm.

[0069] Application scenario: Rehabilitation training mode: the amplitude is adjusted to 5-15 mm through the controller, the frequency is 10 Hz, the muscle contraction is stimulated to promote blood circulation.

[0070] Relaxation massage mode: the amplitude is adjusted to 20-30 mm, the frequency is 5 Hz, and the swinging action of artificial massage is simulated.

[0071] Zero-gravity mode: the pulsation direction is perpendicular to the direction of the gravity of the human body in combination with the angle adjusting function of the massage chair, and the suspension relaxation effect is realized.

[0072] Closed-loop control: the load change of the bearing part is monitored in real time by adding a pressure sensor. The controller adopts a PID algorithm, the output torque and the rotating speed of the extension push rod 7 are dynamically adjusted according to the displacement feedback of the grating sensor, the angle feedback of the rotary encoder and the load feedback of the pressure sensor, and the amplitude deviation is less than ±2% under different load conditions.

[0073] The adjustable-amplitude pulsation machine provided by the present application is described in detail. The principle and implementation mode of the present application are described by applying specific examples in the present application. The above embodiment is only used for helping to understand the method and the core idea of the present application. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principle of the present application, and the improvements and modifications also fall within the protection scope of the present application.

Claims

1. A rhythm machine with adjustable amplitude, comprising a base, a rhythm seat, and a rhythm drive mechanism, wherein the rhythm drive mechanism comprises an eccentric rotor and a yaw sleeve mounted on the eccentric rotor, the yaw sleeve being movably connected to the rhythm seat to drive the rhythm seat to reciprocate in a set direction; characterized in that: The rhythm machine further includes an amplitude adjustment mechanism, and the amplitude adjustment mechanism includes: a telescopic push rod adapted to output a telescopic motion; and An adjusting link, one end of which is pivotally connected to the deflection sleeve, and the other end of which is transmission-connected to the telescopic push rod via a buffer device; in response to the telescopic movement of the telescopic push rod, the adjusting link can adjust the rhythm amplitude of the rhythm seat by changing the initial angle between the deflection sleeve and the set direction; The buffer device comprises: a buffer seat fixedly connected to the base; and a buffer lever, which is positioned on the buffer seat in a pivotable manner about a set axis, one end of the buffer lever being pivotally connected to the telescopic push rod, and the other end of the buffer lever being pivotally connected to the adjustment link; The instantaneous impact force applied to the adjusting link during the swinging process of the deflection sleeve can be resisted by the buffer seat and the buffer lever, so as to reduce the impact on the telescopic push rod.

2. The rhythm machine according to claim 1, characterized in that The initial angle refers to the angle between the yaw sleeve and the set direction when the yaw sleeve starts to oscillate.

3. The rhythm machine according to claim 1 or 2, characterized in that: The set direction is the rhythm direction of the rhythm seat.

4. The rhythm machine according to claim 1 or 2, characterized in that: The included angle between the adjusting link and the buffer lever is an acute angle, so that the instantaneous impact force can be resisted by the buffer seat.

5. The rhythm machine according to claim 4, characterized in that: The included angle between the buffer lever and the telescopic push rod is also an acute angle, so as to reduce the impact force of the buffer lever on the telescopic push rod.

6. The rhythm machine according to claim 1, characterized in that: The buffer lever is rotatably positioned on the buffer seat via a pivot shaft, and the instantaneous force applied to the buffer lever can be resisted by the pivot shaft.

7. The rhythm machine according to claim 6, characterized in that: Both ends of the pivot shaft are positioned on the buffer seat.

8. The rhythm machine according to claim 1, characterized in that: The eccentric rotor is configured as an eccentric wheel fixed on a rotating shaft, or an eccentric shaft attached to a rotating shaft.

9. The rhythm machine according to claim 1, characterized in that: The deflection sleeve has: A movable fitting portion sleeved on the eccentric rotor; a deflection rod extending from the movable engaging portion toward one side of the rhythm seat, wherein the deflection rod and the rhythm seat are movably hinged; and An actuating portion extends from the movable engaging portion toward one side of the buffer lever, and the actuating portion and the buffer lever are movably hinged.

10. The rhythm machine according to claim 1, characterized in that: The buffer lever and the adjustment link are configured to rotate around a first pivot axis, the buffer lever and the telescopic push rod are configured to rotate around a second pivot axis, the distance between the setting axis and the first pivot axis is defined as H1, and the distance between the setting axis and the second pivot axis is defined as H2, wherein H1≥H2, so as to reduce the impact of the buffer lever on the telescopic push rod.

11. The amplitude-adjustable rhythm machine according to claim 1, characterized in that: The amplitude adjustment mechanism also includes an amplitude detection component, which includes a photoelectric encoder or a grating sensor. The photoelectric encoder is connected to the hinge shaft at one end of the adjustment link to detect its rotation angle, and the grating sensor is arranged on the travel path of the hinge shaft at one end of the adjustment link to detect its displacement.

12. The amplitude-adjustable rhythm machine according to claim 11, characterized in that: The grating sensor includes an indicator grating fixedly connected to the adjustment link, a scale grating fixedly connected to the base, a light source and a photoelectric element. The indicator grating and the scale grating are arranged relative to each other and the directions of the engraved lines form a preset angle. The photoelectric element outputs the displacement data of the adjustment link by detecting the moiré fringe signal generated by the relative movement of the indicator grating and the scale grating.

13. The amplitude-adjustable rhythm machine according to claim 11, characterized in that: The photoelectric encoder includes an amplitude code disk and photoelectric sensors arranged on both sides of the amplitude code disk. The amplitude code disk is fixed on the rotating shaft connecting the adjustment link and the buffer lever. When the amplitude code disk rotates with the buffer lever, the photoelectric sensor senses and outputs a corresponding pulse signal.

14. The amplitude-adjustable rhythm machine according to claim 1 or 2, characterized in that: The rhythmic drive mechanism includes a driving member and a position detection component electrically connected thereto. The position detection component is used to detect the rotation angle of the output shaft of the driving member and generate a feedback signal to a controller.

15. The amplitude-adjustable rhythm machine according to claim 14, characterized in that: The position detection component is a rotary encoder, which includes an angle code disk fixed coaxially with the output shaft of the driving member and a photoelectric sensor. When the angle code disk rotates with the output shaft, the photoelectric sensor determines the absolute angular position of the output shaft based on the feedback signal.

16. The amplitude-adjustable rhythm machine according to claim 1, characterized in that: With the deflection center of the deflection sleeve as the fulcrum, the length of the lever arm of the output end is 1.5-2.5 times the length of the lever arm of the actuating part, wherein the output end is the connecting end between the deflection sleeve and the rhythm seat, and the actuating part is the connecting end between the deflection sleeve and the adjusting connecting rod.

17. The amplitude-adjustable rhythm machine according to claim 9, characterized in that: With the center of the movable engaging portion as a fulcrum, the angle between the lever arm of the deflection lever and the lever arm of the actuating portion is 130°-150°.

18. A sitting or sleeping device, characterized in that: It comprises a rhythm machine with adjustable amplitude as described in any one of claims 1 to 17, wherein the rhythm seat is fixedly connected to the supporting part of the sitting or sleeping equipment to drive the supporting part to reciprocate rhythmically.

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