CN110559605B

CN110559605B - Slope-adjustable medical exercise flat plate

Info

Publication number: CN110559605B
Application number: CN201910865210.XA
Authority: CN
Inventors: 吴英乐; 董晓晶
Original assignee: First Affiliated Hospital of Henan University of Science and Technology
Current assignee: First Affiliated Hospital of Henan University of Science and Technology
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-09-15
Anticipated expiration: 2039-09-12
Also published as: CN110559605A

Abstract

The invention relates to the field of medical diagnosis equipment, in particular to a medical sport flat plate with an adjustable gradient. The lifting device is provided with a positioning mechanism used for limiting a plurality of specific gradient positions of the walking platform; the lifting device comprises a first rotating shaft, two cams and two idler wheels, wherein the first rotating shaft is rotatably arranged on the base, the two cams are respectively installed at two ends of the first rotating shaft in a matched mode, the two idler wheels are respectively rotatably arranged at two sides of the walking table, the first rotating shaft is distributed along the width direction of the base, the idler wheels on the corresponding sides are in contact with rims of the cams, the idler wheels and the rims of the cams can be in rolling fit, and a worm and gear speed reducer used for driving the first rotating shaft to rotate through a driving hand wheel is further arranged at one end of the first rotating shaft on the. The slope adjustment of the invention is accurate and continuous, so that the condition of the testee can be truly reflected by the testee through a standard exercise scheme.

Description

Slope-adjustable medical exercise flat plate

Technical Field

The invention relates to the field of medical diagnosis equipment, in particular to a medical sport flat plate with an adjustable gradient.

Background

In the examination and diagnosis of coronary heart disease in the department of cardiology, although the maximum reserve capacity of coronary artery dilation has been reduced, coronary artery blood flow can be normally maintained at rest, without myocardial ischemia, and the electrocardiogram can be completely normal. To reveal reduced or relatively fixed coronary blood flow, cardiac ischemia can be clinically diagnosed by loading the heart with exercise or other means, increasing myocardial oxygen consumption, inducing myocardial ischemia. Such a test method in which myocardial ischemia is induced by increasing cardiac load by exercise to thereby cause ischemic electrocardiographic change is called an electrogram exercise test, and the exercise plate test is most commonly used at present. Its advantages are that the change of electrocardiogram can be observed during exercise, and the amount of exercise can be gradually increased according to the target. The electrocardiographic exercise test of the elderly usually adopts a modified Bruce scheme, namely, the speed (2.7-8.0 Km/h) and the gradient (0-18 degrees) of the driving plate are gradually increased by seven stages, so that a testee can easily reach a preset heart rate, and the electrocardiograph can conveniently and accurately measure the heart rate.

In the existing medical instrument market, a special exercise plate is not developed for the electrocardiogram exercise test. The exercise flat plate used in clinic is improved by a household treadmill. The speed regulation function of the motion flat plate can be accurately realized through the speed regulation variable frequency motor, but the slope regulation can not be well matched with an electrocardiogram motion test. This is because the slope adjustment function of the existing treadmill is mainly achieved by a manual adjustment or an automatic adjustment. The manual adjustment mode is realized by matching a positioning pin and a plurality of positioning holes, a testee needs to walk down a walking platform in the process of slope adjustment, then the positioning pin is pulled out from the positioning hole corresponding to a certain slope and inserted into another positioning hole corresponding to the slope, and the testee can walk up the walking platform after the positioning is finished and continue to increase the heart load through walking movement. The continuity is poor, the continuous load increase of the subject cannot be realized, and the condition of the subject cannot be truly reflected. The automatic adjustment mode is realized mostly by depending on the cylinder, although the continuity is better, the slope adjustment can be realized without walking down the walking platform by the testee, but under the continuous trampling of the testee, the telescopic precision of the piston rod of the cylinder is difficult to guarantee, the accurate adjustment of the slope in the electrocardiogram exercise test can not be guaranteed, and the implementation of the heart load increasing scheme is not facilitated.

Disclosure of Invention

The invention aims to provide a medical exercise flat plate with adjustable gradient, which is accurate and continuous in gradient adjustment so that a subject can truly reflect the condition of the subject through a standard exercise scheme.

In order to solve the technical problems, the invention adopts the technical scheme that: a medical motion flat plate with adjustable gradient comprises a walking platform and a base correspondingly arranged below the walking platform, wherein the front end of the walking platform is hinged to the base, a lifting device is arranged between the rear end of the walking platform and the base and can control the lifting of the rear end of the walking platform to realize the gradient adjustment of the walking platform, and a positioning mechanism used for limiting a plurality of specific gradient positions of the walking platform is arranged in the lifting device;

the lifting device comprises a first rotating shaft, two cams and two rolling wheels, wherein the first rotating shaft is rotatably arranged on the base, the two cams are respectively installed at two ends of the first rotating shaft in a matched mode, the two rolling wheels are respectively rotatably arranged at two sides of the walking table, the first rotating shaft is distributed along the width direction of the base, so that the rolling wheels at the corresponding sides and the rims of the cams are mutually contacted and can be matched in a rolling mode, a worm and gear reducer is further arranged at one end of the first rotating shaft on the base, a worm wheel in the worm and gear reducer is coaxially installed with the first rotating shaft in a matched mode, and a driving hand wheel;

the positioning mechanism comprises an electromagnetic clutch arranged between a driving hand wheel and a worm and gear speed reducer, a power supply used for supplying power to the electromagnetic clutch and a plurality of pressure sensors used for controlling the on-off of a power supply circuit between the electromagnetic clutch and the power supply, the pressure sensors are arranged on the rim of the cam at intervals, the signal output ends of the pressure sensors are connected to the same single chip microcomputer, the signal output end of the single chip microcomputer is connected with a relay arranged on the power supply circuit between the power supply and the electromagnetic clutch, the single chip microcomputer is internally provided with a first logic programming, the first logic programming enables the power supply circuit between the power supply and the electromagnetic clutch to be disconnected by the relay after any one pressure sensor is pressed and triggered by a roller, and the relay reconnects the power supply circuit between the power supply and the electromagnetic clutch after the power supply and the electromagnetic clutch are disconnected.

Preferably, the number of the pressure sensors is seven, and the angles between the walking board and the base are 0 °, 5 °, 10 °, 12 °, 14 °, 16 °, and 18 ° respectively in the state that the roller contacts the seven pressure sensors during the relative rolling of the roller and the cam.

Preferably, a rolling groove for the rolling matching of the roller is formed in the rim of the cam along the circumferential direction, mounting holes for the matching mounting of corresponding pressure sensors are formed in the bottom of the rolling groove at intervals, and pressure sensitive elements in the pressure sensors extend out of the mounting holes by 2-3 mm.

Preferably, the signal output end of the single chip microcomputer is further connected with a loudspeaker, the single chip microcomputer is further provided with a second logic program, and the second logic program enables any one pressure sensor to be pressed and triggered by the roller wheel, and then the loudspeaker broadcasts the included angle between the walking table and the base in the corresponding state.

Preferably, the traveling platform comprises a rectangular frame, a traveling roller and a traveling belt, wherein the traveling roller and the traveling belt are arranged in the rectangular frame, and the rectangular frame is further provided with a variable frequency motor for driving the traveling roller to rotate.

Preferably, a first shaft seat for rotating and matching the first rotating shaft is fixedly arranged at the rear end position of the base; and second rotating shafts are fixedly arranged on two sides of the front end of the rectangular frame respectively, and a second shaft seat for the second rotating shafts to be in running fit is arranged at the front end of the base.

Advantageous effects

The front end of the walking platform is hinged to the base, the rear end of the walking platform is supported on the base through the lifting mechanism, torque can be transmitted to the first rotating shaft through the worm gear speed reducer by rotating the driving hand wheel so as to drive the cam to rotate, and therefore the purpose of adjusting the gradient of the walking platform is achieved through relative rolling between the roller and the cam on the walking platform. Due to the torque amplification effect of the worm gear speed reducer, a test subject does not need to walk down to a walking platform in the gradient adjustment process, and the implementation continuity of the experimental scheme is maintained. And due to the self-locking effect of the worm gear speed reducer, the cam can stably support the roller, the walking platform and a subject on the walking platform, maintain each specific gradient in the test process and be beneficial to the accurate implementation of the test scheme.

In the aspect of accurately adjusting the gradient of the walking platform, an electromagnetic clutch is arranged between a driving hand wheel and a worm and gear speed reducer, a plurality of pressure sensors corresponding to a test stage are arranged on a cam at intervals, and the gradient of the walking platform when the pressure sensors are forced to be pressed and triggered by rollers corresponds to a plurality of gradients required by a load motion scheme one by one. When the cam and the roller rotate relatively until the roller presses one pressure sensor, the relay is driven by the single chip microcomputer to disconnect the power supply of the electromagnetic clutch until a period of time, and then the electromagnetic clutch is reconnected, so that the driving hand wheel is disconnected from a torque transmission channel of the worm gear speed reducer, medical personnel obviously sense that the gradient adjustment is in place, and the driving hand wheel stops rotating. The medical staff can be prevented from rotating the inertia of the driving hand wheel or the rotation inertia of the driving hand wheel drives the cam to excessively rotate, so that the roller deviates from the pressure sensor, the adjustment precision of the gradient adjustment between two adjacent stages in the load motion scheme is further highly ensured, and the heart rate activity condition of the testee is more accurately reflected by the load motion scheme. After the slope is accurately adjusted, the quick disconnection between the driving hand wheel and the worm and gear speed reducer enables medical workers to quickly rotate the driving hand wheel in a state where the medical workers are not concerned about, and therefore the slope switching in the load motion scheme is quickly completed.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is a schematic view of the cam and roller of the present invention in cooperation;

FIG. 4 is a schematic diagram of the electrical connections of the positioning mechanism portion of the present invention;

FIG. 5 is a schematic structural diagram of the walking platform in FIG. 1 after the gradient adjustment;

the labels in the figure are: 1. the device comprises a second rotating shaft, 2, a walking platform, 3, a cam, 301, a rolling groove, 4, a roller, 5, a worm and gear speed reducer, 6, a driving hand wheel, 7, an electromagnetic clutch, 8, a first shaft seat, 9, a first rotating shaft, 10, a base, 11, a second shaft seat, 12, a pressure sensor, 1201, a pressure sensitive element, 13, a single chip microcomputer, 14, a relay, 15 and a power supply.

Detailed Description

As shown in fig. 1 and 2, the medical exercise flat plate with adjustable slope of the invention comprises a walking platform 2 and a base 10 correspondingly arranged below the walking platform 2. The base 10 is in a rectangular table shape and horizontally disposed on the ground. The walking platform 2 comprises a rectangular frame, and walking rollers and a walking belt which are arranged in the rectangular frame, wherein one walking roller is a driving roller and is in transmission connection with a variable frequency motor arranged on the rectangular frame. All the walking rollers are driven to rotate through the variable frequency motor, so that the walking belt is driven to rotate, and a subject can carry out load movement through the walking belt. The rotating speed of the walking belt can be accurately adjusted by the variable frequency motor during the load movement. In the embodiment, aiming at the design of the improved Bruce load exercise scheme suitable for the old, the speed of the walking belt is divided into seven gears, the speed is increased progressively from 2.7 m/s to 8.0m/s, and the exercise test of any one gear lasts for three minutes.

Corresponding to the speed up-shift, the gradient of the walking platform 2 is also gradually up-shifted from 0 degrees to 18 degrees so as to match the speed to lift the moving load of the testee. The adjustment of the gradient in the invention is realized by reducing the rear end of the walking platform 2, specifically: the two sides of the front end (right end in fig. 1) of the rectangular frame in the walking table 2 are respectively provided with a second rotating shaft 1, and a second shaft seat 11 for the second rotating shaft 1 to be in running fit is arranged at the corresponding position of the front end of the base 10, so that the walking table 2 can rotate by taking the second rotating shaft 1 as the center. A lifting device is provided between the rear end (left end in fig. 1) of the walking table 2 and the base 10, and when the lifting device lifts the rear end of the walking table 2 to the state shown in fig. 1, the walking table 2 is parallel to the base 10 with a slope of 0 °. When the rear end of the traveling platform 2 is controlled to descend by the elevating device to the state shown in fig. 5, the slope of the traveling platform 2 reaches 18 ° at the maximum. In order to precisely control the adjustment of the slope of the walking board 2, the lifting device is also provided with a positioning mechanism for defining a plurality of specific slope positions of the walking board 2, wherein the specific slopes are 0 degrees at the beginning of the test, 18 degrees at the end of the test and 5 degrees, 10 degrees, 12 degrees, 14 degrees and 16 degrees at the middle section of the test.

The lifting device mainly comprises a first rotating shaft 9 which is rotatably arranged on a base 10, two cams 3 which are respectively matched and arranged at two ends of the first rotating shaft 9, and two rollers 4 which are respectively rotatably arranged at two sides of a walking platform 2. The first rotating shaft 9 is distributed along the width direction of the base 10 and is parallel to the first rotating shaft 9, and a first shaft seat 8 for rotatably matching the first rotating shaft 9 is fixedly arranged on the base 10. Two ends of the first rotating shaft 9 respectively extend out of two sides of the walking platform 2, so that the rims of the rollers 4 on the walking platform 2 respectively fall on the rims of the cams 3 on the corresponding sides, and the rollers 4 and the cams 3 can be in rolling fit in the process that the cams 3 rotate along with the rotating shaft. A worm and gear speed reducer 5 is further arranged on the base 10 and located at one end of the first rotating shaft 9, a worm wheel in the worm and gear speed reducer 5 is coaxially matched with the first rotating shaft 9, and a driving hand wheel 6 is connected to the worm through an electromagnetic clutch 7. Under the rotation that electromagnetic clutch 7 connects the drive hand wheel 6 and the worm of worm gear speed reducer 5, can drive cam 3 through rotating the hand wheel and rotate to promote the rear end of walking platform 2 to rise in order to reduce the slope, or cooperate the action of the gravity of walking platform 2 to make the rear end of walking platform 2 descend in order to increase the slope. Because of the torque amplification effect of the worm gear and worm speed reducer 5, a subject does not need to walk down the walking table 2 in the gradient adjustment process, the implementation continuity of the experimental scheme is maintained, medical workers do not need to exert too much force in the gradient adjustment process of the walking table 2, and the labor intensity is weak. And due to the self-locking effect of the worm gear and worm speed reducer 5, the worm can be driven to rotate by the worm, and the worm cannot be driven by the worm to rotate, so that the cam 3 can stably support the roller 4, the walking table 2 and a subject on the walking table 2, each specific gradient in the test process is maintained, and the accurate implementation of a test scheme is facilitated.

As shown in fig. 3, in the present embodiment, a rolling groove 301 for the roller 4 to roll is formed in the rim of the cam 3 along the circumferential direction, and a range in which the roller 4 rolls along the cam 3 is limited by the right-angled steps at two ends of the rolling groove 301, that is, a section of the left side shown in fig. 3 close to the top of the cam 3, so as to better control the accuracy of the slope adjustment of the walking table 2 through the positioning mechanism.

The positioning mechanism of the present invention includes the above-described electromagnetic clutch 7, a power supply 15 for supplying power to the electromagnetic clutch 7, and seven pressure sensors 12 for controlling on/off of a power supply circuit between the electromagnetic clutch 7 and the power supply 15. As shown in fig. 3, seven pressure sensors 12 are installed in the installation holes opened at the bottom of the rolling groove 301 at intervals, and the arrangement positions of the seven pressure sensors 12 are related to the gradient of the walking board 2 when pressed and triggered by the roller 4, specifically: when the roller 4 rolls to the first pressure sensor 12 on the left side in fig. 3, the gradient of the walking table 2 is 18 °, when the roller rolls to the second pressure sensor 12, the gradient of the walking table 2 is 16 °, and so on, and when the roller 4 rolls to the rightmost pressure sensor 12, the gradient of the walking table 2 is 0 °.

The pressure sensitive elements 1201 of all the pressure sensors 12 extend out of the mounting holes by 2-3mm, so that the roller 4 can press the pressure sensitive elements 1201 to trigger the corresponding pressure sensors 12 when rolling to the corresponding positions along the rolling groove 301. As shown in fig. 4, the signal output terminals of all the pressure sensors 12 are connected to the same one-chip microcomputer 13, and the signal output terminal of the one-chip microcomputer 13 is connected to a relay 14 provided on a power supply circuit between a power supply 15 and the electromagnetic clutch 7. The single chip microcomputer 13 is provided with a first logic program, the relay 14 disconnects the power supply circuit between the power supply 15 and the electromagnetic clutch 7 after any one pressure sensor 12 is pressed and triggered by the roller 4, and the relay 14 reconnects the power supply circuit between the power supply 15 and the electromagnetic clutch 7 after disconnection for 5-10 seconds.

In this embodiment, the RD6 pin of the single chip 13 is connected to a base of a PNP transistor, and directly drives the relay 14 after current amplification by the PNP transistor. The switching on and off of the relay 14 is controlled entirely by the base level of the transistor. When the single chip microcomputer 13RD6 port outputs high level, the PNP type triode is cut off, at the moment, the relay 14 does not work, the electromagnetic clutch 7 is powered off, and the driving hand wheel 6 is separated from the worm gear box speed reducer. When the port 13RD6 of the single chip microcomputer outputs low-level power, the PNP type triode is conducted, the relay 14 is electrified and attracts to work, the electromagnetic clutch 7 is electrified and connected, and the driving hand wheel 6 is connected with the worm gear box speed reducer. The first logic is programmed to switch off the electromagnetic clutch 7 after the single chip microcomputer 13 receives an electric signal that any one of the pressure sensors 12 senses the forced pressure, namely, the high-level current is output through an RD6 port. And the low-level current is continuously output through an RD6 port within 5-10 seconds after the cut-off, so that the electromagnetic clutch 7 is engaged again.

Through the structure and the control mode, the invention can achieve the following technical effects: in the standby state, the electromagnetic clutch 7 is kept in the engaged state, and when the medical staff adjusts the gradient of the walking table 2, the driving hand wheel 6 can be rotated quickly. Once the target gradient is reached, the roller 4 is in contact with the pressure sensor 12 at the corresponding position, the electromagnetic clutch 7 is controlled to be disconnected by the single chip microcomputer 13 for 5-10 seconds, medical staff can obviously sense the disconnection, and accordingly the hand wheel 6 is stopped to be driven by shaking. The inertia of the driving hand wheel 6 rotated by medical staff or the rotation inertia of the driving hand wheel 6 itself to drive the cam 3 to excessively rotate is avoided, the adjusting precision of the slope adjustment between two adjacent stages in the load motion scheme is guaranteed, and the heart rate activity condition of a testee is more accurately reflected by the load motion scheme.

The single chip microcomputer 13 of the present embodiment is further connected to a speaker, the single chip microcomputer 13 further has a second logic program, and the second logic program enables any one of the pressure sensors 12 to be triggered by the roller 4 under pressure, and then the speaker broadcasts the included angle between the walking table 2 and the base 10 in the corresponding state. So that medical personnel can clearly hear the result of corresponding slope adjustment in the slope adjustment process, and the probability of slope adjustment error is reduced.

Claims

1. The utility model provides a slope adjustable medical motion is dull and stereotyped, includes walking platform (2) and corresponds base (10) that set up the walking platform (2) below, its characterized in that: the front end of the walking table (2) is hinged on the base (10), a lifting device is arranged between the rear end of the walking table (2) and the base (10), the lifting device can control the lifting of the rear end of the walking table (2) to realize the adjustment of the gradient of the walking table (2), and the lifting device is internally provided with a positioning mechanism used for limiting a plurality of specific gradient positions of the walking table (2);

the lifting device comprises a first rotating shaft (9) rotatably arranged on a base (10), two cams (3) respectively installed at two ends of the first rotating shaft (9) in a matched mode, and two rollers (4) respectively rotatably arranged at two sides of the walking platform (2), the first rotating shaft (9) is distributed along the width direction of the base (10) so that the rollers (4) at the corresponding sides and the rims of the cams (3) are in contact with each other and can be in rolling fit, a worm gear reducer (5) is further arranged at one end of the first rotating shaft (9) on the base (10), a worm wheel in the worm gear reducer (5) is coaxially installed with the first rotating shaft (9) in a matched mode, and a driving hand wheel (6) is connected to the worm;

the positioning mechanism comprises an electromagnetic clutch (7) arranged between a driving hand wheel (6) and a worm and gear speed reducer (5), a power supply (15) used for supplying power to the electromagnetic clutch (7) and a plurality of pressure sensors (12) used for controlling the on-off of a power supply circuit between the electromagnetic clutch (7) and the power supply (15), the pressure sensors (12) are arranged on the rim of the cam (3) at intervals, the signal output ends of the pressure sensors (12) are connected to the same single chip microcomputer (13), the signal output end of the single chip microcomputer (13) is connected with a relay (14) arranged on the power supply circuit between the power supply (15) and the electromagnetic clutch (7), the single chip microcomputer (13) is internally provided with a first logic program, after any one pressure sensor (12) is pressed and triggered by the roller (4), the power supply circuit between the power supply (15) and the electromagnetic clutch (7) is disconnected by the relay (14), and the power supply circuit between the power source (15) and the electromagnetic clutch (7) is reconnected by the relay (14) after 5-10 seconds of disconnection.

2. The adjustable-gradient medical exercise platform of claim 1, wherein: the number of the pressure sensors (12) is seven, and in the relative rolling process of the roller (4) and the cam (3), under the condition that the roller (4) is in contact with the seven pressure sensors (12), the angles between the walking table (2) and the base (10) are respectively 0 degrees, 5 degrees, 10 degrees, 12 degrees, 14 degrees, 16 degrees and 18 degrees.

3. The adjustable-gradient medical exercise platform of claim 2, wherein: a rolling groove (301) for the rolling matching of the roller (4) is formed in the rim of the cam (3) along the circumferential direction, mounting holes for the matching mounting of corresponding pressure sensors (12) are formed in the bottom of the rolling groove (301) at intervals, and pressure sensitive elements (1201) in the pressure sensors (12) extend out of the mounting holes by 2-3 mm.

4. The adjustable-gradient medical exercise platform of claim 2, wherein: the signal output end of the single chip microcomputer (13) is also connected with a loudspeaker, the single chip microcomputer (13) is also provided with a second logic programming, and the second logic programming enables any one pressure sensor (12) to be pressed and triggered by the roller (4) and then the loudspeaker to broadcast the included angle between the walking table (2) and the base (10) in the corresponding state.

5. The adjustable-gradient medical exercise platform of claim 1, wherein: the walking platform (2) comprises a rectangular frame, a walking roller and a walking belt, wherein the walking roller and the walking belt are arranged in the rectangular frame, and the rectangular frame is also provided with a variable frequency motor used for driving the walking roller to rotate.

6. The adjustable-slope medical exercise platform of claim 5, wherein: a first shaft seat (8) for the rotary matching of the first rotating shaft (9) is fixedly arranged at the rear end position of the base (10); two sides of the front end of the rectangular frame are respectively fixedly provided with a second rotating shaft (1), and the front end of the base (10) is provided with a second shaft seat (11) for the second rotating shaft (1) to be in running fit with.