Vibration reduction method and vibration reduction system
A vibration damping system and output shaft technology, which is applied in portable mobile devices, inertial force compensation, manufacturing tools, etc., can solve problems such as numb hands, unfavorable use of users, and harmful user hand health, etc., and achieve the effect of strong practicability.
Active Publication Date: 2014-06-04
POSITEC POWER TOOLS (SUZHOU) CO LTD
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AI-Extracted Technical Summary
Problems solved by technology
[0003] However, when the multi-function machine is working, the shift fork, output shaft and working head move together as a swinging whole. Since the shifting fork and working head have a certain mass, the center of mass of the swinging whole is not on the swinging axis of the output shaft, resulting in The overall eccentric swing of the swing will...
Abstract
The invention provides a vibration reduction method of a multifunctional machine. The vibration reduction method of the multifunctional machine includes the steps of providing a balance module movably connected with an output shaft and synchronously swinging together with the output shaft, obtaining parameters of extrusion conducted on a shaft sleeve through the output shaft in at least two staggered directions, judging whether each extrusion parameter belongs to a preset threshold range or not, if yes, continuing to keep synchronous swinging between the balance module and the output shaft, and if not, changing the relative position of the balance module and the output shaft so as to adjust each extrusion parameter to be within the preset threshold range. According to the vibration reduction method, the relative position of the output shaft and the balance module is adjusted by comparing all the extrusion parameters till all the extrusion parameters belong to the preset threshold range, then synchronous swinging of the balance module and the output shaft is kept and the vibration of the multifunctional machine is the smallest at the moment. The invention further provides a vibration reduction system corresponding to the vibration reduction method.
Application Domain
Inertia force compensationPortable power-driven tools
Technology Topic
Reduction methodsExtrusion +1
Image
Examples
- Experimental program(1)
Example Embodiment
[0042] The present invention will be described in detail below in conjunction with the specific embodiments shown in the drawings. However, these embodiments do not limit the present invention, and the structural, method, or functional changes made by those skilled in the art based on these embodiments are all included in the protection scope of the present invention.
[0043] Participate Figure 1 to Figure 5 As shown, in an embodiment of the present invention, a multifunction machine 100 with a vibration reduction system 30 includes an eccentric member 10, a shift fork 21, an output shaft 22 fixedly connected to the shift fork 21, and a shaft sleeved on the periphery of the output shaft 22 A sleeve 23 and a working head 24 connected to the free end of the output shaft 22. The multifunction machine 100 includes a motor. The motor drives the eccentric member 10 to eccentrically rotate. The eccentric member 10 drives the shift fork 21 and the output shaft 22 to reciprocate, thereby driving the working head 24 to reciprocate.
[0044] Among them, since the shift fork 21 and the working head 24 have a certain quality, the shift fork 21, the output shaft 22 and the working head 24 jointly swing eccentrically. This eccentric swing will inevitably produce large vibrations, and this vibration will always It acts on the output shaft 22 and the sleeve 23 sleeved on the outside of the output shaft 22, and is subsequently transmitted to the user's hand through the sleeve 23, which damages the health of the user's hand.
[0045] Participate Figure 6 to Figure 8 As shown, the vibration reduction method provided by the present invention is used for the vibration reduction of the multifunctional machine 100, which specifically includes:
[0046] S1. Provide a balance module 31, which is movably connected to the output shaft 22 and swings synchronously with it; the balance module 31, the shift fork 21, the output shaft 22, and the working head 24 together form the swing unit 20, and the balance module 31 can still be relative to the output shaft 22 moves to adjust the center of mass of the entire swing 20;
[0047] S2. Obtain the extrusion parameters of at least two staggered directions of the output shaft 22 with respect to the sleeve 23; wherein, the extrusion parameters include the extrusion force, or the rate of change of the extrusion force, or a combination of the foregoing two. The directions of any two extrusion forces are not on the same straight line, so that all extrusion parameters of the output shaft 22 against the sleeve 23 can be accurately obtained, and the center of mass position of the swing body 20 can be judged through all the extrusion parameters;
[0048] S3. Determine whether each extrusion parameter belongs to the preset threshold range. If so, continue to keep the balance module 31 and the output shaft 22 swinging synchronously; if not, change the relative position of the balance module 31 and the output shaft 22 to adjust each extrusion parameter. Pressure parameters to the preset threshold range.
[0049] Among them, when each extrusion parameter falls within the preset threshold range, the extrusion force of the output shaft 22 to the sleeve 23 is the smallest, and the vibration generated by the swing of the swing unit 20 is the smallest. At this time, the center of mass of the swing unit 20 is located on the swing axis. There is no need to adjust the position of the balance module 31. After the subsequent synchronization of the balance module 31 and the output shaft 22 is maintained, the step S2 and the step S3 are returned to perform the self-starting of the vibration damping method, so that the multifunctional machine 100 will always Maintain vibration reduction treatment.
[0050] Correspondingly, when at least one extrusion parameter exceeds the preset threshold range, the position of the balance module 31 relative to the output shaft 22 is adjusted to adjust the center of mass of the swing unit 20 to the swing axis.
[0051] Specifically, the movement mode of the balance module 31 includes: rotation around the output shaft, translation toward or away from the output shaft 22, or a combination of the foregoing two motion modes, and one of the foregoing three motion modes is adopted by judging the current position of the center of mass of the swing body 20 To move the balance module 31.
[0052] In the present invention, the preset threshold range is well known to those of ordinary skill in the art. When all the extrusion parameters fall within the preset threshold range, the vibration of the grip point of the multifunction machine 100 is less than 20m/s2. The vibration of the machine 100 does not cause discomfort to the user, and effectively protects the user's hand health.
[0053] Specifically, the vibration reduction method further includes a step S0: setting a preset threshold range, wherein the step S0 is located before the step S3.
[0054] In the present invention, the steps of implementing the vibration reduction method using the extrusion force value, or the extrusion force change rate, or the combination of the extrusion force value and the extrusion force change rate as the extrusion parameters are the same, so only the extrusion force value As the extrusion parameters, the vibration reduction method is described in detail, and the steps of the vibration reduction method implemented by using the other two parameters will not be repeated here.
[0055] Specific parameters Image 6 As shown, in the first embodiment of the vibration reduction method, the S0 step is before the S1 step.
[0056] In this embodiment, the S3 step specifically includes:
[0057] S31: Determine whether each extrusion force falls within the preset threshold range, and if so, continue to maintain the balance module 31 and the output shaft 22 to swing synchronously;
[0058] S32: In the foregoing step S31, if at least one of the pressing forces exceeds the preset threshold range, obtain the initial position of the balance module 31 relative to the output shaft 22, and compare all the pressing forces to obtain the rotation of the balance module 31 relative to the output shaft 22 The angle to be rotated and the target position after the rotation;
[0059] S33: Calculate the shortest path for the balance module 31 to move from the initial position to the target position;
[0060] S34: Control the balance module 31 to rotate to the target position on the shortest path and then return to perform step S2.
[0061] In this embodiment, after comparing all the pressing forces, it is determined that the balance module 31 only needs to rotate around the output shaft 22 to the target position to achieve the adjustment of the center of mass of the swing body 20, and return to the step S2 after performing step S34 to ensure Automated operation of the vibration reduction method.
[0062] Among them, the rotation mode of the balance module 31 includes spiral movement around the output shaft 22. At this time, the target position does not indicate a point, but a line segment on the outer surface of the output shaft 22. The extension direction of this line segment is parallel to the swing axis. Moving the module 31 to this line segment has the same effect of changing the center of mass of the entire swing 20.
[0063] In step S33, the balance module 31 can rotate from the initial position to the target position in two opposite directions, so it has two different rotation paths, and the shorter path is the shortest path. By making the balance module 31 move on the shortest path, the time for adjusting the position of the balance module 31 is effectively reduced, and the vibration reduction efficiency is improved.
[0064] In step S34, after the balance module 31 moves to the target position, it returns to perform step S2, so that the vibration damping process is automatically performed, and the multifunction machine 100 is always in a vibration damping state.
[0065] Specific parameters Figure 7 As shown, in the second embodiment of the vibration reduction method, the S0 step is before the S1 step.
[0066] In this embodiment, the S3 step specifically includes:
[0067] S31: Determine whether each extrusion force falls within the preset threshold range, and if so, continue to maintain the balance module 31 and the output shaft 22 to swing synchronously;
[0068] S32: In the foregoing step S31, if at least one of the pressing forces exceeds the preset threshold range, compare all the pressing forces to obtain the moving distance that the balance module 31 needs to move toward or away from the output shaft 22;
[0069] S33: Control the balance module 31 to move the vertical swing axis by the distance to be moved and then return to step S2.
[0070] In this embodiment, after comparing all the pressing forces, it is determined that the balance module 31 is translated by the distance to be moved relative to the output shaft 22 to achieve the adjustment of the center of mass of the entire swing 20.
[0071] Preferably, in step S33, the balance module 31 moves perpendicular to the swing axis, so that the distance to be moved is the shortest, and the vibration reduction efficiency is improved.
[0072] Among them, in step S33, the balance module 31 returns to perform step S2 after the translation ends, so that the vibration reduction process is automatically performed, and the multifunction machine 100 is always in the vibration reduction state.
[0073] Specific parameters Figure 8 As shown, in the third embodiment of the vibration reduction method, the S0 step is before the S1 step.
[0074] In this embodiment, the S3 step specifically includes:
[0075] S31: Determine whether each extrusion force falls within the preset threshold range, and if so, continue to maintain the balance module 31 and the output shaft 22 to swing synchronously;
[0076] S32: In the foregoing step S31, if at least one of the pressing forces exceeds the preset threshold range, obtain the initial position of the balance module 31 relative to the output shaft 22, and compare all the pressing forces to obtain the rotation of the balance module 31 relative to the output shaft 22 The to-be-turned angle of, and the target position after the rotation, and the to-be-moved distance of the balance module 31 moving toward or away from the output shaft 22 after moving to the target position;
[0077] S33: Calculate the shortest path for the balance module 31 to rotate from the initial position to the target position;
[0078] S34: Control the balance module 31 to rotate to the target position in the shortest path;
[0079] S35: Control the balance module 31 to move the vertical swing axis by the distance to be moved and then return to step S2.
[0080] In this embodiment, after comparing all the extrusion forces, it is determined that the balance module 31 rotates around the output shaft 22 by an angle to be rotated, and then the balance module 31 is controlled to translate the distance to be moved relative to the output shaft 22 to achieve the adjustment of the center of mass of the entire swing 20.
[0081] In step S33, the balance module 31 can rotate from the initial position to the target position in two opposite directions, so it has two different rotation paths, and the shorter path is the shortest path. Preferably, the balance module 31 is moved along the shortest path, which effectively reduces the time for adjusting the position of the balance module 31 and improves the efficiency of vibration reduction.
[0082] Among them, the rotation mode of the balance module 31 includes spiral movement around the output shaft 22. At this time, the target position does not indicate a point, but a line segment on the outer surface of the output shaft 22. The extension direction of this line segment is parallel to the swing axis. The module 31 has the same effect of changing the center of mass of the entire swing 20 on this line segment.
[0083] In step S35, preferably, the balance module 31 moves perpendicular to the swing axis, so that the distance to be moved is the shortest, and the vibration reduction efficiency is improved.
[0084] Wherein, after the balance module 31 completes the translation, it still returns to perform step S2, so that the vibration damping process is automatically performed, and it is ensured that the multifunction machine 100 is always in a vibration damping state.
[0085] It should be noted that in this embodiment, the sequence of the steps S34 and S35 is not limited to the sequence described above, and the vibration reduction processing can still be achieved by changing the sequence of the two steps, which will not be repeated here.
[0086] In summary, the vibration reduction method provided by the present invention adjusts the relative position of the output shaft 22 and the balance module 31 by comparing all the extrusion parameters of the output shaft 22 to the sleeve 23 until the output shaft 22 is opposite to the sleeve 23 When all the extrusion forces of the machine are within the preset threshold range, the balance module 31 and the output shaft 22 swing synchronously. At this time, the extrusion force of the output shaft 22 to the sleeve 23 is the smallest, that is, the multifunction machine 100 has the smallest vibration and at the same time damping The method can run automatically to ensure continuous vibration reduction of the multifunction machine 100, so that when the multifunction machine 100 adopts different working heads 24, or when the working conditions change, the vibration reduction treatment can be automatically started, which has strong practicability.
[0087] Participate Figure 1 to Figure 5 versus Picture 9 As shown, the present invention also provides a vibration reduction system 30 corresponding to the vibration reduction method, which includes:
[0088] The balance module 31 is movably connected to the output shaft 22 and swings synchronously with the output shaft 22. The balance module 31, the shift fork 21, the output shaft 22 and the working head 24 together form the swing unit 20;
[0089] The driving module 32 drives the balance module 31 to move, thereby adjusting the center of mass of the swing unit 20;
[0090] At least two pressure sensing modules (not shown) are arranged on the inner surface of the sleeve 23 in contact with the output shaft 22, the cross section of the output shaft 22 is circular, and any two pressure sensing modules are not on the same diameter of the cross section , So as to obtain the extrusion force of the output shaft 22 against the sleeve 23 in at least two staggered directions through at least two pressure sensing modules, so as to accurately obtain all the extrusion forces of the output shaft 22 against the sleeve 23. Judge the position of the center of mass of the entire swing 20;
[0091] The control module 33 obtains all the extrusion forces from the pressure sensing module and determines whether each extrusion force falls within the preset threshold range. If so, the control module 33 controls the driving module 32 to keep the balance module 31 and the output shaft 22 swinging synchronously; if No, the control module 33 controls the driving module 32 to change the relative position of the balance module 31 and the output shaft 22 to adjust each pressing force to the preset threshold range.
[0092] In the vibration reduction system 30, when each pressing force falls within the preset threshold range, the pressing force of the output shaft 22 to the sleeve 23 is the smallest, and the vibration generated by the swing of the entire swing 20 is the smallest. At this time, the center of mass of the swing 20 It is located on the swing axis, so there is no need to adjust the position of the balance module 31 to keep the balance module 31 and the output shaft 22 swinging synchronously.
[0093] Correspondingly, when at least one pressing force exceeds the preset threshold range, the driving module 32 adjusts the position of the balance module 31 relative to the output shaft 22, and then adjusts the center of mass of the swing unit 20 to the swing axis.
[0094] During the use of the multifunction machine 100, the pressure sensing module continuously obtains the pressing force. After a single vibration reduction process is completed, the control module 33 continues to obtain the current pressing force from the pressure sensing module and judges the current pressing force. Whether the force belongs to the preset threshold value range, and the balance module 31 is adjusted according to the aforementioned judgment result, so that the vibration damping system 30 can continue to operate, which ensures that the multifunctional machine 100 maintains the vibration damping process during long-term use.
[0095] Specifically, the movement modes of the driving module 32 to drive the balance module 31 include: rotating relative to the output shaft, moving toward or away from the output shaft, or a combination of the foregoing two motion modes, and selecting the foregoing three by judging the current center of mass position of the swing body 20 One of the moving methods to complete the vibration reduction treatment.
[0096] Correspondingly, when the vibration reduction system 30 uses the rate of change of the extrusion force or the combination of the rate of change of the extrusion force and the extrusion force as the extrusion parameters, the pressure sensing module transmits the extrusion force collected in real time to the control module to control The module obtains the rate of change of the extrusion force, and then uses the rate of change of the extrusion force as an extrusion parameter to adjust the position of the balance module 31, and its vibration reduction principle remains unchanged.
[0097] Participate Figure 1 to Figure 3 as well as Picture 9 As shown, in an embodiment of the present invention, in the vibration reduction system 30, the control module 33 sets the preset threshold range, the number of balance modules 31 is set to two, and the two balance modules 31 are interleaved with each other, and each control module 31 Both are connected to a driving module 32, and the two driving modules 32 are jointly connected to a control module 33. The control module 33 controls the two driving modules 32 to drive the two balance modules 31 to move respectively to adjust the center of mass of the swing body 20.
[0098] Wherein, two guiding parts 221 are fixed on the outer side of the output shaft 22, and each balance module 31 is inserted into a guiding part 221 correspondingly and moves inside the guiding part 221. At the same time, the balance module 31 passes through the guiding part 221 Swing synchronously with the output shaft 22.
[0099] In particular, the control module 33 obtains the swing axis of the output shaft 22, and the drive module 32 controls the balance module 31 to move perpendicular to the swing axis, thereby improving the efficiency of vibration reduction.
[0100] In this embodiment, by providing the structure of the guiding portion 221, the balance module 31 is restricted to only be able to translate perpendicularly to the swing axis.
[0101] In this embodiment, the balance module 31 includes an arc-shaped guide slot 311, and the extending direction of the arc-shaped guide slot 311 corresponds to the swing path of the balance module 31, so that the balance module 31 drives when the output shaft 22 swings. The module 32 and the balance module 31 are always in contact, so that the position of the balance module 31 can be adjusted at any time.
[0102] Correspondingly, the driving module 32 includes a resisting rod 321 and a driving motor 322 that drives the resisting rod 321 to translate. A transmission structure is provided between the driving motor 322 and the resisting rod 321 to convert the rotation of the output shaft of the driving motor 322 into the resisting rod. In the translational movement of the 321, a freely rotatable ball (not shown) is provided at the front end of the resisting rod 321. The ball resists the arc-shaped guide groove 311 to drive the balance module 31 to move toward the output shaft 22. At the same time, since the ball can rotate freely, After the translation of the balance module 31 is completed, the driving module 32 will not affect the swing of the entire swing 20.
[0103] In particular, the driving module 32 also includes a return spring (not shown) located inside the guide portion 221. Both ends of the return spring are respectively connected to the guide portion 221 and the balance module 31. The resisting rod 321 resists the balance module 31 toward the output shaft. During the movement of 22, the return spring is stretched. When the balance module 31 needs to move in the reverse direction, the resisting rod 321 moves away from the output shaft 22, and the return spring pulls the balance module 31 to move away from the output shaft 22.
[0104] The driving module 32 drives the two balance modules 31 to move toward or away from the output shaft 22 through the cooperation of the resisting rod 321 and the return spring, so as to realize the arbitrary adjustment of the position of the center of mass of the swing unit 20 to complete the vibration reduction process.
[0105] In particular, the control module 33 compares all the squeezing forces to obtain the moving distance that each balance module 31 needs to move, and the drive module 32 drives each balance module 31 to move its corresponding standby distance, thereby improving the efficiency of vibration reduction.
[0106] It should be noted that after a single vibration reduction process is completed, the control module 33 continues to obtain the pressing force from the pressure sensing module, and determines whether vibration reduction is required according to the current pressing force, so that the vibration reduction system 30 can automatically Start to ensure continuous vibration reduction of the multifunction machine 100.
[0107] In this embodiment, the control module 33 and the drive module 32 are both fixed inside the casing of the multifunction machine 100, thereby ensuring the stable operation of the vibration reduction system 30.
[0108] Participate Figure 4 , Figure 5 versus Picture 9 As shown, in another embodiment of the present invention, the control module 33 sets the preset threshold range, the number of balance modules 31 is set to one, and the balance module 31 is connected to the first drive module 32a, the second drive module 32b, and the control module 33 is connected to the first drive module 32a and the second drive module 32b, and the position of the balance module 31 is adjusted through the first drive module 32a and the second drive module 32b.
[0109] In this embodiment, a guiding portion 221 is provided on the outer side of the output shaft 22, and the guiding portion 221 is threadedly connected with the output shaft 22.
[0110] The balance module 31 is correspondingly inserted into the guide portion 221 and moves inside the guide portion 221. At the same time, the balance module 31 swings synchronously with the output shaft 22 through the guide portion 221.
[0111] In this embodiment, the balance module 31 includes an arc-shaped guide groove 311, and the extending direction of the arc-shaped guide groove 311 is the same as the swing path of the balance module 31, so that the balance module 31 swings along with the output shaft 22. A driving module 32a is always in contact with the arc guide groove 311, which is convenient for adjusting the position of the balance module 31 at any time.
[0112] Specifically, the first driving module 32a includes a first resisting rod 321a and a first driving motor 322a that drives the first resisting rod 321a to translate. A transmission structure is provided between the first driving motor 322a and the first resisting rod 321a. The rotation of the output shaft of the first driving motor 322a is converted into the translational movement of the first resisting rod 321a. The front end of the first resisting rod 321a is provided with a freely rotatable ball (not shown), and the ball resists the arc-shaped guide groove 311 The balance module 31 is driven to move toward the output shaft 22, and the balls can rotate freely, so that after the translation of the balance module 31 ends, the first driving module 32a will not affect the swing of the entire swing 20.
[0113] In particular, the first driving module 32a further includes a first return spring (not shown) located inside the guide portion 221. Two ends of the first return spring are respectively connected to the guide portion 221 and the balance module 31. The first resisting rod 321a When the balance module 31 moves toward the output shaft 22, the first return spring is stretched. When the balance module 31 needs to move in the reverse direction, the first support rod 321a moves away from the output shaft 22, and the first return spring pulls the balance module. 31 moves away from the output shaft 22.
[0114] The first driving module 32a drives the balance module 31 to move toward or away from the output shaft 22 through the cooperation of the first resisting rod 321a and the return spring, thereby completing part of the vibration reduction treatment.
[0115] In particular, the control module 33 compares all the pressing forces to obtain the translation distance of the balance module 31 toward or away from the output shaft 22, and the first driving module 32a drives the balance module 31 to translate the distance to be moved.
[0116] In this embodiment, by providing the structure of the guiding portion 221, the balance module 31 is restricted to only be able to translate perpendicularly to the swing axis.
[0117] The vibration reduction system 30 also includes a second driving module 32b, which also includes a second resisting rod 321b and a second driving motor 322b that drives the second resisting rod 321b to translate. The second driving motor 322b and the second resisting A transmission structure is provided between the holding rods 321b to convert the rotation of the output shaft of the second driving motor 322b into the translational movement of the second holding rod 321b, and the movement direction of the second holding rod 321b is parallel to the output shaft 22, that is, the second The translation direction of the resisting rod 321b is perpendicular to the moving direction of the first resisting rod 321a.
[0118] In particular, a freely rotatable ball (not shown) is provided at the front end of the second resisting rod 321b, and the ball resists the top wall of the balance module 31 to drive the balance module 31 to move along the extension direction of the output shaft 22. The guide portion 221 is threadedly connected to the output shaft 31, and the balance module 31 follows the guide portion 221 to spirally move along the output shaft 22. At the same time, the ball can rotate freely, so that after the spiral movement of the balance module 31 ends, the second drive module 32b will not Affect the swing of the entire swing 20.
[0119] In this embodiment, the top wall of the balance module 31 is a flat wall to prevent the second resisting rod 321b from affecting the balance module 31 to swing.
[0120] The second driving module 32 also includes a second return spring (not shown) located outside the output shaft 22. The second resisting rod 321b and the second return spring are separately placed on both sides of the guide portion 221, and they cooperate to drive The guiding part 221 and the balance module 31 spirally move along the output shaft 22. The two ends of the second return spring are respectively connected to the guiding part 221 and the inside of the multifunction and the casing. The second abutting rod 321b resists the balance module 31 while moving along the output shaft 22. The second return spring is squeezed. During the reverse movement of the balance module 31, the second resisting rod 321b moves back, and the second return spring is reset to push the balance module 31 back.
[0121] The vibration reduction system 30 also includes a position sensing module (not shown). The position sensing module senses the initial position of the balance module 31 relative to the output shaft 22 and transmits it to the control module 33. The control module 33 calculates the shortest path from the initial position to the target position. The second driving module 32b drives the balance module 31 to rotate to the target position along the shortest path.
[0122] The control module 33 controls the movement direction of the second resisting rod 321b according to the shortest path, and cooperates with the second return spring to control the balance module 31 to move along the shortest path.
[0123] After the second driving module 32b controls the balance module 31 to rotate to the target position, the control module 33 determines whether each current extrusion force data belongs to the threshold range. If so, the control module 33 keeps the balance module 31 and the output shaft 22 to swing synchronously; if not , The first drive module 32a and the second drive module 32b jointly change the relative position of the balance module 31 and the output shaft 22.
[0124] In this embodiment, through the cooperation of the first drive module 32a and the second drive module 32b, the balance module 31 can complete rotation around the output shaft 22, or translation toward or away from the output shaft 22, or a combination of the foregoing two movement modes, so that The vibration reduction system 30 quickly completes the vibration reduction requirements and has a high vibration reduction efficiency.
[0125] The control module 33, the first drive module 32a, and the second drive module 32b are all fixed inside the casing of the multifunction machine 100, thereby ensuring the stable operation of the vibration reduction system 30.
[0126] The multi-function machine 100 using the aforementioned vibration reduction system 30 provided by the present invention has minimal vibration during the working process and protects the safety of the user’s hands. At the same time, the multi-function machine 100 adopts different working heads 24 or changes in working conditions. At that time, the damping system 30 is automatically turned on and continues to run, which has strong practicability.
[0127] It should be understood that although this specification is described in accordance with the implementation manners, not each implementation manner only contains an independent technical solution. This narration in the specification is only for clarity, and those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0128] The series of detailed descriptions listed above are only specific descriptions of feasible implementations of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementations or implementations made without departing from the technical spirit of the present invention All changes shall be included in the protection scope of the present invention.
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