CN109745664B - Running machine - Google Patents

Abstract

The invention discloses a treadmill, which comprises a base, an annular running belt, two transmission rollers, a plurality of lifting steps and a plurality of elastic units. On the standing surface, two transmission rollers are parallel to the lifting steps, and are respectively arranged on the front and rear sides of the arrangement direction of several lifting steps. Two elastic units are respectively arranged at both ends of the transmission roller and the lifting step. The elastic unit includes a casing, a piston rod, a spring and an adjusting mechanism. The casing is fixedly connected to the horizontal frame. The casing is provided with an opening, and the piston rod passes through the opening and slides with the casing. Connection, the end of the lifting step is fixedly connected with the end of the piston rod that goes out of the casing, the end of the transmission roller is rotatably connected with the end of the piston rod that goes out of the casing, the spring is connected between the adjusting assembly and the piston rod, and the adjusting mechanism is used for Adjust the spring compression.

Description

a treadmill

technical field

The invention relates to the field of sports equipment, and more particularly to a treadmill.

Background technique

Treadmill is a standing fitness equipment in homes and gyms, and it is the simplest type of home fitness equipment today, and it is the best choice for home fitness equipment. However, the existing treadmill has a single structure, and the experience of using it is far from that of running in nature, and it cannot lead athletes to go out of the city and experience nature.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a treadmill whose endless running belt can simulate hard road, grass, and sand to achieve better exercise effect.

In order to achieve the above purpose, the present invention provides the following technical solutions: a treadmill, comprising a base, an endless running belt, two transmission rollers, a number of lifting steps and a number of elastic units, and the base includes a running The horizontal frame of the active area and the upright column arranged under the horizontal frame, a plurality of the lifting steps are arranged in parallel with each other to form a running standing surface, and the two transmission rollers are parallel to the lifting steps and are respectively arranged on several lifting steps On the front and rear sides of the arrangement direction, the annular running belt is sleeved on the outer peripheral wall of the transmission roller and the outer peripheral walls of several lifting steps, and several of the elastic units are respectively arranged on both ends of the transmission roller and the lifting steps, so The elastic unit comprises a casing, a piston rod, a spring and an adjusting mechanism, the casing is fixedly connected with the horizontal frame, an opening is provided on the side of the casing facing the annular running belt, the piston rod passes through the opening and is slidably connected with the casing, The end of the lifting step is fixedly connected with the end of the piston rod that goes out of the casing, the end of the transmission roller is rotatably connected with the end of the piston rod that goes out of the casing, one end of the spring is connected to the adjusting assembly, and the other end is connected At one end of the piston rod located in the housing, the spring is used to keep the piston rod moving upward, and the adjustment mechanism is used to adjust the compression amount of the spring.

As a further improvement of the present invention, the adjustment assembly includes a screw plug and a passive pulley, the inner wall of the housing is provided with an internal thread, the outer peripheral wall of the screw plug is provided with an external thread, and the screw plug is threadedly connected in the housing , the passive pulley is arranged on the end of the casing facing away from the annular running belt, the passive pulley includes an output shaft, the screw plug is provided with a rectangular limit hole, and one end of the output shaft is connected to the passive pulley. On the shaft center, the other end passes through the casing and the rectangular limit hole. When the driven pulley rotates, the output shaft rotates, and the screw plug moves axially along the inner thread of the casing, pushing the spring to compress and deform.

As a further improvement of the present invention, the adjustment assembly further includes a thrust bearing, the inner ring of the thrust bearing is fixedly connected with the screw plug, and the outer ring of the thrust bearing is fixedly connected with the other end of the spring away from the piston rod.

As a further improvement of the present invention, it also includes a driving mechanism for driving the driven pulley to rotate, the driving mechanism includes a servo motor, a driving pulley, two first belts and several second belts, and the horizontal frame downwards A motor seat is extended, the servo motor is arranged on the side of the motor seat facing the endless running belt, the output end of the servo motor extends downward and passes through the motor seat, and the axle center of the driving pulley is arranged at the end of the output end The outer peripheral wall of the driving pulley and the outer peripheral wall of the passive pulley are respectively provided with two synchronous rails distributed up and down in parallel, a first belt is sleeved on a synchronous rail of the driving pulley and is arranged on one side of the driving pulley. On a synchronous track of the passive pulley at the front end, the other first belt is sleeved on another synchronous track of the active pulley and a synchronous track of the passive pulley arranged at the front end on the other side of the driving pulley. Several The second belt is sequentially sleeved on a synchronous track of the passive pulley and a synchronous track of the adjacent passive pulley.

As a further improvement of the present invention, the two ends of the drive roller are extended with rotating shafts, and the end of the piston rod located at one end of the drive roller close to the drive roller is provided with a bearing seat, the bearing seat is provided with a bearing, and the outer portion of the bearing is provided with a bearing seat. The ring is fixedly connected with the bearing seat, and the inner ring of the bearing is fixedly connected with the rotating shaft of the drive roller.

A control method of a treadmill, comprising the following steps:

S1: start the power supply, turn on;

S2-1: Input and save the user's height, weight, age, and gender parameters;

S2-2: Select the simulated road type. The simulated ground type can be selected as one of hard ground, grass, and sand. After selection, the system calculates the simulated ground type and the parameters of the user's height, weight, age, and gender. And automatically adjust the spring compression;

S2-3; set the movement speed v0;

S3-1: start running, record the current exercise time t,

S3-2: The user judges whether to stop exercising, if so, stop, and display the time spent exercising and the calories consumed, if not, continue exercising;

S4: The user judges whether to adjust the exercise parameters, if so, stop, display the current exercise time and calories consumed, and enter S5; if not, enter S3-1;

S5-1: The user judges whether to adjust the height, weight, age, and gender parameters, if so, return to S2-1; if not, enter S3-1;

S5-2: The user judges whether to adjust the road surface type, if so, go back to S2-2, if not, go to S3-1;

S5-3: The user judges whether to choose to adjust the motion speed v0, if so, go back to S2-3; if not, go to S3-1;

S6: Shut down and reset the system.

In S2, the movement stop time can be controlled by adding step S2-4 or S2-5;

S2-4: Preset exercise time t0, and add S3-3 in S3, the system judges whether the current exercise t matches the preset time t0, if so, it will stop, and display the time used for exercise and calories consumed, if not, return S3-1;

S2-5: Preset calories consumed, and add S3-4 in S3, the system judges whether the current calorie consumption matches the preset calorie consumption; S3-1.

Add adjustment step S5-4 or S5-5 in S5:

S5-4: The user judges whether to adjust the preset time t0, if so, return to S2-4, if not, go to S3-1; S5-5: The user judges whether to adjust the preset calories, if so, return to S2-5, if No, go to S3-1.

Beneficial effects of the present invention: The present invention obtains three springs 23 with different compression amounts through the adjusting mechanism, and utilizes the characteristics of compression and deformation of the springs 23, respectively corresponding to the scenarios of simulating hard ground, grass and sand, with simple structure and easy industrialization The user forms a flexible contact at the moment of stepping, thereby greatly improving the comfort of the user during running exercise, and avoiding the damage to the knee joint and ankle joint that the runner is prone to produce during the exercise process.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is a partial enlarged view of Fig. 1;

3 is a cross-sectional view of an elastic unit;

Figure 4 is an internal exploded view of the elastic unit;

Figure 5 is a bottom view of the present invention;

6 is a partial enlarged view of the bottom of the present invention;

Figure 7 is a schematic diagram of the working state.

Reference numerals: 0, base; 11, endless running belt; 12, transmission roller; 121, rotating shaft; 13, lifting step; 14, column; 15, horizontal frame; 16, motor base; 17, frame; 18 , control panel; 2, elastic unit; 21, shell; 22, piston rod; 23, spring; 24, opening; 25, screw plug; 251, external thread; 252, rectangular limit hole; 26, passive pulley; 261 , output shaft; 211, internal thread; 27, thrust bearing; 41, servo motor; 42, driving pulley; 43, first belt; 44, second belt; 45, synchronous track; 51, bearing seat; 52, bearing .

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. Wherein the same parts are denoted by the same reference numerals.

1 to 7 , a treadmill of this embodiment includes a base 0, an endless running belt 11, two transmission rollers 12, a number of lifting steps 13, and a number of elastic units 2. The base 0 Including a horizontal frame 15 for forming a running activity area and a column 14 arranged below the horizontal frame 15, a plurality of the lifting steps 13 are arranged in parallel to each other to form a running standing surface, and the two transmission rollers 12 are connected to the lifting step. The gears 13 are parallel and are respectively arranged on the front and rear sides of the arrangement direction of the several lifting gears 13. The annular running belt 11 is sleeved on the outer peripheral wall of the transmission roller 12 and the outer peripheral walls of the several lifting gears 13. The elastic force units 2 are respectively arranged on both ends of the transmission roller 12 and the lifting step 13. The elastic force unit 2 includes a casing 21, a piston rod 22, a spring 23 and an adjustment mechanism. The casing 21 is fixedly connected with the horizontal frame 15. The An opening 24 is provided on the side of the casing 21 facing the endless running belt 11 , the piston rod 22 passes through the opening 24 and is slidably connected to the casing 21 , and the end of the lifting step 13 and the end of the piston rod 22 that pass through the casing 21 Fixed connection, the end of the transmission roller 12 is rotatably connected with the end of the piston rod 22 that goes out of the casing 21, one end of the spring 23 is connected to the adjustment assembly, and the other end is connected to the end of the piston rod 22 located in the casing 21, the said The spring 23 is used to keep the piston rod 22 moving upward, and the adjustment mechanism is used to adjust the compression amount of the spring 23 .

In this embodiment, one end of the upright column 14 is connected to the horizontal frame 15, and the other end extends downwards away from the horizontal frame 15. The upright column 14 plays the role of supporting the entire treadmill. The two drive rollers 12 are respectively provided with motors. The motor makes the transmission roller 12 rotate, and drives the endless running belt 11 to rotate, so that the user can run on the endless running belt 11 . In the initial state, the length of the piston rod 22 passing through the casing 21 in the elastic unit 2 is the same, the plurality of piston rods 22 form a running standing surface with a smooth surface, the length of the spring 23 is compressed to the shortest, and when the user steps on the endless running belt 11, The spring 23 is no longer compressed, the piston rod 22 and the lift step 13 do not move, that is, a hard road is simulated; when it is necessary to simulate grass, the compression amount of the spring 23 is reduced, and the length of the spring 23 in the compressed state is increased by the adjustment mechanism. , when the user steps on the endless running belt 11, due to the pressure of the human body on the endless running belt 11 and the lifting step 13, the spring 23 is compressed, the piston rod 22 and the lifting step 13 move downward, and the endless running belt 11 sinks; When sandy ground is required, that is, under the condition of simulating grass, the compression amount of the spring 23 is further reduced, and the length of the spring 23 in the compressed state is further increased through the adjustment mechanism. The pressure of the endless running belt 11 and the lifting step 13 compresses the spring 23; the piston rod 22 and the lifting step 13 move downward, and the endless running belt 11 sags. Compared with the simulated grass, the annular running belt 11 sinks more; when When the user leaves the endless running belt 11, the elastic force of the spring 23 makes the piston rod 22 and the lift step 13 move upward, and the piston rod 22 and the lift step 13 return to the initial state, forming a running standing surface with a smooth surface.

The present invention obtains three springs 23 with different compression amounts through the adjustment mechanism, and utilizes the characteristics of compression and deformation of the springs 23, respectively corresponding to the scenarios of simulating hard ground, grass and sand, with simple structure and easy industrialization; The flexible contact is formed in an instant, thereby greatly improving the user's comfort during running exercise, and avoiding the damage to the knee joint and ankle joint that is easily caused by the runner during the exercise process.

As an improved specific embodiment, the adjustment assembly includes a screw plug 25 and a passive pulley 26, the inner wall of the housing 21 is provided with an internal thread 211, and the outer peripheral wall of the screw plug 25 is provided with an external thread 251, so The screw plug 25 is screwed into the casing 21, the passive pulley 26 is arranged on the end of the casing 21 facing away from the endless running belt 11, the passive pulley 26 includes an output shaft 261, and the screw plug 25 is provided with a A rectangular limit hole 252, one end of the output shaft 261 is connected to the axis of the passive pulley 26, and the other end passes through the casing 21 and the rectangular limit hole 252. When the passive pulley 26 rotates, the output shaft 261 rotates , the screw plug 25 moves axially along the inner thread 211 of the housing 21 to push the spring 23 to compress and deform.

In this embodiment, the cross-sectional shape of the output shaft 261 matches the rectangular limit hole 252 , and the output shaft 261 rotates while driving the screw plug 25 to rotate without slipping. When the compression amount of the spring 23 needs to be changed, the output shaft 261 arranged on the passive pulley 26 is rotated by the rotation of the driven pulley 26, and the screw plug 25 moves axially along the inner thread 211 of the housing 21, pushing the spring 23 to compress and deform, or It is away from the spring 23 to elongate and deform, so that the circular running without the belt can simulate the situation of hard ground, grass and sand.

As an improved specific embodiment, the adjustment assembly further includes a thrust bearing 27 , the inner ring of the thrust bearing 27 is fixedly connected with the screw plug 25 , and the outer ring of the thrust bearing 27 and the spring 23 are away from the piston rod 22 . The other end is fixedly connected.

Through the above technical solution, there are balls between the inner ring and the outer ring of the thrust bearing 27, and the inner ring can rotate relative to the outer ring; When the thread 211 moves axially, the plug 25 rotates with the inner ring of the thrust bearing 27, while the spring 23 is fixedly connected with the outer ring of the thrust bearing 27, and does not rotate with the plug 25, and directly connects with the end of the spring 23 away from the piston rod 22. Compared with the connection of the screw plug 25, the phenomenon of breaking the spring 23 caused by the torsion spring 23 is avoided, the structure is simple, and the implementation is convenient.

As an improved specific embodiment, it also includes a driving mechanism for driving the driven pulley 26 to rotate. The driving mechanism includes a servo motor 41 , a driving pulley 42 , two first belts 43 and several second belts 44 , the horizontal frame 15 extends downward with a motor base 16 , the servo motor 41 is arranged on the side of the motor base 16 facing the endless running belt 11 , and the output end of the servo motor 41 extends downward and passes through the motor base 16 , the axis of the driving pulley 42 is arranged at the end of the output end, the outer peripheral wall of the driving pulley 42 and the outer peripheral wall of the passive pulley 26 are respectively provided with two synchronous rails 45 distributed up and down in parallel, a first belt 43 is sleeved on a synchronous track 45 of the driving pulley 42 and a synchronous track 45 of the passive pulley 26 arranged at the front end on one side of the driving pulley 42, and another first belt 43 is sleeved on the driving pulley 42. The other synchronous track 45 is arranged on a synchronous track 45 of the passive pulley 26 at the front end on the other side of the driving pulley 42 , and a plurality of the second belts 44 are sequentially sleeved on a synchronous track 45 of the passive pulley 26 . On a synchronous track 45 with the adjacent passive pulley 26 .

Through the above technical solution, in this embodiment, the frame 17 and the control panel 18 can be further installed on the base 0, and the opening of the servo motor 41 and the number of turns of the output end can be controlled by the control panel 18. When the servo motor 41 rotates, The driving pulley 42 is rotated, and through the first belt 43, the driven pulleys 26 at the front end of the arrangement on both sides of the driving pulley 42 also rotate at the same time, and through the second belt 44, the driven pulleys 26 arranged at the rear also rotate at the same time. Rotation, thereby changing the compression amount of the spring 23 in the elastic unit 2, the structure is simple and the efficiency is high.

As an improved specific embodiment, a rotating shaft 121 extends from both ends of the drive roller 12 , and a bearing seat 51 is provided on one end of the piston rod 22 at one end of the drive roller 12 close to the drive roller 12 . A bearing 52 is provided, the outer ring of the bearing 52 is fixedly connected with the bearing 52 seat 51 , and the inner ring of the bearing 52 is fixedly connected with the rotating shaft 121 of the transmission roller 12 .

Through the above technical solutions, in this embodiment, there are balls between the outer ring and the inner ring of the bearing 52, and the inner ring can rotate relative to the outer ring. The friction is transformed into rolling friction, increasing efficiency.

A control method of a treadmill, comprising the following steps:

S1: start the power supply, turn on;

S2-1: Input and save the user's height, weight, age, and gender parameters;

S2-2: Select the simulated road type. The simulated ground type can be selected as one of hard ground, grass, and sand. After selection, the system calculates the simulated ground type and the parameters of the user's height, weight, age, and gender. And automatically adjust the spring compression;

S2-3; set the movement speed v0;

S3-1: start running, record the current exercise time t,

S3-2: The user judges whether to stop exercising, if so, stop, and display the time spent exercising and the calories consumed, if not, continue exercising;

S4: The user judges whether to adjust the exercise parameters, if so, stop, display the current exercise time and calories consumed, and enter S5; if not, enter S3-1;

S5-1: The user judges whether to adjust the height, weight, age, and gender parameters, if so, return to S2-1; if not, enter S3-1;

S5-2: The user judges whether to adjust the road surface type, if so, go back to S2-2, if not, go to S3-1;

S5-3: The user judges whether to choose to adjust the motion speed v0, if so, go back to S2-3; if not, go to S3-1;

S6: Shut down and reset the system.

In S2, the movement stop time can be controlled by adding step S2-4 or S2-5;

S2-4: Preset exercise time t0, and add S3-3 in S3, the system judges whether the current exercise t matches the preset time t0, if so, it will stop, and display the time used for exercise and calories consumed, if not, return S3-1;

S2-5: Preset calories consumed, and add S3-4 in S3, the system judges whether the current calorie consumption matches the preset calorie consumption; S3-1.

Add adjustment step S5-4 or S5-5 in S5:

S5-4: The user judges whether to adjust the preset time t0, if so, go back to S2-4, if not, go to S3-1;

S5-5: The user judges whether to adjust the preset calories, if so, returns to S2-5, and if not, goes to S3-1.

When in use, the system will calculate the appropriate spring compression amount according to the height and weight parameters, so that different resilience can be obtained when running to simulate the effect of hard road, grass and sand. It has better functions and better exercise effect than ordinary treadmills; during running, users can actively stop exercising, or automatically stop exercising by reaching a preset running time and preset calorie consumption.

The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims (6)

1. A treadmill, characterized by: including base (0), annular area of running (11), two driving roller (12), a plurality of go up and down to step shelves (13) and a plurality of elasticity unit (2), base (0) is including running activity region horizontal frame (15) that are used for forming and stand (14), a plurality of in horizontal frame (15) below the lift step shelves (13) parallel arrangement each other forms a running standing facade, two driving roller (12) are parallel with lift step shelves (13), set up respectively in the front and back both sides of the array orientation of a plurality of lift step shelves (13), annular area of running (11) cover is established driving roller (12) periphery jade and is gone up and down to step shelves (13) on the periphery jade, a plurality of elasticity unit (2) set up respectively at the both ends of driving roller (12) and lift step shelves (13), elasticity unit (2) include shell (21), Piston rod (22), spring (23) and adjustment mechanism, shell (21) and horizontal frame (15) fixed connection, shell (21) are provided with opening (24) on the one side towards annular running belt (11), opening (24) are passed in piston rod (22), with shell (21) sliding connection, the one end fixed connection that shell (21) were worn out to tip and piston rod (22) of going up and down step shelves (13), the one end rotation connection that shell (21) were worn out to tip and piston rod (22) of driving roller (12), spring (23) one end is connected on adjusting part, and the one end that piston rod (22) were located shell (21) is connected to the other end, spring (23) are used for keeping piston rod (22) rebound, adjustment mechanism is used for adjusting spring (23) compressive capacity, adjusting part includes plug screw (25), Passive band pulley (26), shell (21) inner wall is provided with internal thread (211), be provided with external screw thread (251) on the periphery wall of plug screw (25), plug screw (25) threaded connection is in shell (21), passive band pulley (26) set up in shell (21) one end of annular running belt (11) dorsad, passive band pulley (26) include output shaft (261), be provided with rectangle spacing hole (252) on plug screw (25), output shaft (261) one end is connected on the axle center of passive band pulley (26), and the other end passes shell (21) and rectangle spacing hole (252), and when passive band pulley (26) rotated, output shaft (261) rotated, plug screw (25) along shell (21) internal thread (211) axial motion, promote spring (23) compression deformation, still include the actuating mechanism who is used for driving passive band pulley (26) pivoted, the driving mechanism comprises a servo motor (41), a driving belt wheel (42), two first belts (43) and a plurality of second belts (44), a motor base (16) is arranged on the horizontal frame (15) in a downward extending mode, the servo motor (41) is arranged on one surface of the motor base (16) facing to the annular running belt (11), the output end of the servo motor (41) extends downwards and penetrates through the motor base (16), the axis of the driving belt wheel (42) is arranged at the end part of the output end, two vertical parallel synchronous rails (45) are respectively arranged on the outer peripheral wall of the driving belt wheel (42) and the outer peripheral wall of the driven belt wheel (26), one first belt (43) is sleeved on one synchronous rail (45) of the driving belt wheel (42) and one synchronous rail (45) of the driven belt wheel (26) arranged at the front end on one side of the driving belt wheel (42), the other first belt (43) is sleeved on the other synchronous track (45) of the driving belt wheel (42) and one synchronous track (45) of the driven belt wheel (26) which is arranged at the front end and is positioned at the other side of the driving belt wheel (42), and the plurality of second belts (44) are sequentially sleeved on one synchronous track (45) of the driven belt wheel (26) and one synchronous track (45) of the adjacent driven belt wheel (26).

2. A treadmill as recited in claim 1, wherein: the adjusting assembly further comprises a thrust bearing (27), an inner ring of the thrust bearing (27) is fixedly connected with the screw plug (25), and an outer ring of the thrust bearing (27) is fixedly connected with the other end, far away from the piston rod (22), of the spring (23).

3. A treadmill as recited in claim 1, wherein: drive roller (12) both ends are extended there is axis of rotation (121), and one of piston rod (22) that are located drive roller (12) one end is close to drive roller (12) is served and is provided with bearing frame (51), be provided with bearing (52) in bearing frame (51), the outer lane and bearing frame (51) fixed connection of bearing (52), the inner circle of bearing (52) and axis of rotation (121) fixed connection of drive roller (12).

4. A method of controlling a treadmill as recited in claim 1, further comprising: the method comprises the following steps:

s1: starting a power supply and starting up;

s2-1: inputting and storing parameters of height, weight, age and sex of a user;

s2-2: selecting a simulated road surface type, wherein the simulated ground type can be one of a hard ground, a grassland and a sand ground, and after the selection is finished, the system calculates and automatically adjusts the compression amount of the spring according to the simulated ground type and parameters of height, weight, age and sex of a user;

s2-3; setting the speed of movement v₀；

S3-1: starting, recording the current movement time t,

s3-2: the user judges whether to stop the exercise, if so, the exercise is stopped, the time used by the exercise and the consumed calories are displayed, and if not, the exercise is continued;

s4: the user judges whether to adjust the exercise parameters, if so, the exercise is stopped, the current exercise time and the consumed calories are displayed, and the step goes to S5, and if not, the step goes to S3-1;

s5-1: the user judges whether to adjust the height, weight, age and sex parameters, if so, the step returns to S2-1; if not, entering S3-1;

s5-2: the user judges whether the road surface type is adjusted, if so, the step returns to S2-2, and if not, the step goes to S3-1;

s5-3: the user judges whether to select to adjust the movement speed v0, if so, the S2-3 is returned; if not, entering S3-1;

s6: and shutting down and resetting the system.

5. The method of controlling a treadmill of claim 4, wherein; the motion stop time may be controlled by adding step S2-4 or S2-5 in S2;

s2-4: preset movement time t₀And increasing S3-3 in S3, the system determines whether the current movement t is equal to the preset time t₀Matching, if yes, stopping, displaying the time for exercise and the consumed calories, and if not, returning to S3-1;

s2-5: preset calorie consumption and increased in S3-4 in S3, the system judges whether the current calorie consumption matches the preset calorie consumption, if so, stops, displays the time taken for exercise and the consumed calorie, and if not, returns to S3-1.

6. The method of controlling a treadmill of claim 5, wherein: in S5, add adjustment step S5-4 or S5-5:

s5-4: the user judges whether to adjust the preset time t₀If yes, returning to S2-4, otherwise, entering S3-1;

s5-5: the user judges whether to adjust the preset calorie, if so, returns to S2-5, otherwise, enters S3-1.

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