A hand-cranked pulse generator for magnetic flux lines

Abstract

The present invention relates to the technical field of pulse generators, and in particular to a hand-cranked pulse generator of magnetic flux lines, comprising a handwheel, wherein the handwheel is rotatably arranged on a mounting shell, a protective mechanism is slidably arranged on the mounting shell, the protective mechanism comprises a protective shell slidably arranged on the mounting shell, a fixed baffle is fixedly connected to the mounting shell, a mobile baffle is fixedly connected to one end of the protective shell away from the fixed baffle, and the end of the protective shell away from the mobile baffle abuts against the fixed baffle; the beneficial effects of the present invention are as follows: through the arrangement of the protective mechanism, the protective shell, the fixed baffle and the mobile baffle together constitute a protective layer, which protects the handwheel installed on the mounting shell, reduces dust and oil in the external environment from entering the interior of the pulse generator, improves the service life of the pulse generator and protects the accuracy of the use of the pulse generator.

Description

Technical Field

[0001] The invention relates to the technical field of pulse generators, and in particular to a hand-cranked pulse generator of magnetic flux lines. Background Art

[0002] A hand-cranked pulse generator is a mechanical device that generates an electrical signal (usually in the form of pulses) by manual rotation. This device is often used for teaching demonstrations, experimental research, or signal generation without power.

[0003] The basic working principle of a hand crank pulse generator is to use the law of electromagnetic induction. When the hand crank handle is turned, it drives the internal rotor to rotate. The rotor may have permanent magnets or coils, which rotate next to the fixed coils in the stator, thereby changing the magnetic field. This changing magnetic field induces voltage in the fixed coils, which in turn generates current. If it is designed to generate a pulse output, then a pulse signal will be generated every time it rotates or reaches a specific angular position.

[0004] This type of device can be used to simulate the working conditions of encoders, counters or other electronic devices that require pulse input. In addition, in some industrial environments, hand-cranked pulse generators can also be used as a manual operation method in emergency situations, such as manual feed control for CNC machine tools.

[0005] Manual pulse generators are easily contaminated by oil or wear in their operating environment. Traditional manual pulse generators have a housing, handwheel mounting base, and handwheel that are manufactured independently and then assembled together. However, dust and oil are easily generated in the working environment, which can cause damage to the manual pulse generator or reduce its performance, affecting the accuracy of the production process.

[0006] Therefore, a hand-cranked pulse generator of magnetic flux lines is needed to solve the above problems. Summary of the invention

[0007] In order to solve the above problem, that is, to solve the problem that dust and oil easily enter the existing hand-cranked pulse generator during use, which affects the service life and accuracy of the hand-cranked pulse generator, the present invention provides a hand-cranked pulse generator with magnetic flux lines.

[0008] A hand-cranked pulse generator of magnetic flux lines, including processing 100 gear tooth grooves on a metal main frame to improve the feel of rotation and the texture of the clicking sound, installing a permanent magnet on the gear to make the entire gear magnetic, and moving the 100 evenly distributed corresponding gears on the metal frame. The tooth grooves are magnetic and self-resetting needle rollers are processed on the gear tooth grooves and the main frame using the NS magnetic principle. The 100 magnetic self-resetting needle rollers generate magnetic flux lines on each other, which can accurately control the rotation accuracy of the gear spindle during rotation and the positioning accuracy after stopping in order to provide better position accuracy for circuit hardware. The inner end face of the gear spindle is connected to a coaxial rotatable coaxial magnet with NS. When the spindle gear rotates, the coaxial magnet will rotate synchronously with the spindle gear. The corresponding PCB board is composed of a Hall chip, an MCU and other electronic components. Through the principle of the change of the NS pole position of a coaxial magnet, the Hall chip will sense the change of the position angle of the magnet rotation, and the Hall element will output a position digital signal (SPI). This position digital signal is processed and shaped by the MCU software into a standard voltage signal output to realize the AB orthogonal pulse signal. It also optimizes the inconsistent and non-standard duty cycle and phase difference of the orthogonal waveform, and improves the final problem by providing higher precision positioning of the spindle when it rotates and stops through the 100 self-resetting needle rollers in the mechanical structure.

[0009] The present invention discloses a hand-cranked pulse generator of magnetic flux lines, comprising a hand wheel, wherein the hand wheel is rotatably arranged on a mounting shell, a protection mechanism is slidably arranged on the mounting shell, the protection mechanism comprises a protection shell slidably arranged on the mounting shell, a fixed baffle is fixedly connected to the mounting shell, a movable baffle is fixedly connected to one end of the protection shell away from the fixed baffle, and one end of the protection shell away from the movable baffle abuts against the fixed baffle.

[0010] Specifically, when in use, the end of the protective shell abuts against the fixed baffle, and the fixed baffle, the protective shell, the movable baffle and the mounting shell together constitute a protective layer to protect the handwheel installed on the mounting shell and reduce the dust and oil in the external environment from entering the interior of the pulse generator; when the handwheel needs to be adjusted, slide the protective shell downward so that the end of the protective shell disengages from the fixed baffle, thereby exposing the handwheel, making it convenient for the user to adjust the handwheel. After the adjustment is completed, slide the protective shell again so that the end of the protective shell abuts against the fixed baffle to protect the handwheel.

[0011] By setting up the protection mechanism, the protection shell, the fixed baffle and the movable baffle together form a protective layer to protect the handwheel installed on the mounting shell, reduce the dust and oil in the external environment from entering the pulse generator, improve the service life of the pulse generator and protect the accuracy of the use of the pulse generator.

[0012] Preferably, the protection mechanism further comprises an auxiliary component, which comprises a semicircular lower closed ring fixedly connected to the movable baffle, an upper closed ring is elastically slidably provided on the mounting shell, and the lower closed ring is magnetically attracted to the end of the upper closed ring.

[0013] Specifically, during use, when the protective shell abuts against the fixed baffle, the lower closed ring absorbs the upper closed ring through magnetic action, so that the lower closed ring and the upper closed ring form a circular ring, closing the gap between the handwheel and the mounting shell, and further preventing external dirt from entering the pulse generator; when the protective shell moves away from the fixed baffle, the lower closed ring leaves the gap between the handwheel and the mounting shell, and at the same time, the upper closed ring is reset under the action of elastic force, so that the upper closed ring leaves the gap between the handwheel and the mounting shell, facilitating the subsequent adjustment and rotation of the handwheel.

[0014] By setting the auxiliary parts, the upper closed ring and the lower closed ring can form a circular ring, closing the gap between the handwheel and the mounting shell, further preventing external dirt from entering the pulse generator, and improving the service life of the hand-cranked pulse generator. At the same time, through the elastic sliding setting of the upper closed ring, when the protective shell is opened, that is, when the handwheel needs to be adjusted, the upper closed ring and the lower closed ring can leave the gap between the handwheel and the mounting shell, so that the upper closed ring and the lower closed ring do not affect the subsequent adjustment action of the handwheel.

[0015] Preferably, the upper closed ring is connected to the mounting shell via an elastic sliding member, the elastic sliding member comprises two sliding grooves symmetrically opened on the mounting shell, each of the sliding grooves is slidably connected with a sliding block, each of the sliding blocks is connected to the sliding groove with a first spring, and each of the sliding blocks is fixedly connected to the upper closed ring via a connecting rod.

[0016] Specifically, during use, when the upper closed ring and the lower closed ring are magnetically attracted to each other, the upper closed ring drives the sliding block to slide in the sliding groove through the connecting rod, and the sliding block stretches the first spring at the same time; when the lower closed ring moves away, the sliding block moves in the direction away from the handwheel under the elastic force of the first spring, and the sliding block drives the upper closed ring to move through the connecting rod.

[0017] By setting the elastic sliding part, the upper closing ring can cooperate with the lower closing ring to close the gap between the hand wheel and the mounting shell, and after the protective shell is opened, the rotation of the hand wheel is not affected.

[0018] Furthermore, the inner ring surfaces of the upper closed ring and the lower closed ring are both provided with a pad layer, and the pad layer is made of rubber material.

[0019] By providing the rubber layer, the upper sealing ring and the lower sealing ring can seal the gap between the hand wheel and the mounting shell more tightly.

[0020] Furthermore, the protective shell is made of transparent material.

[0021] By providing that the protective shell is made of transparent material, the position of the hand wheel can be easily observed.

[0022] Preferably, a processing piece is provided on the inner wall of the protective shell on one side close to the handwheel, and the processing piece includes a fixed block fixedly connected to the protective shell, a pull rod is slidably connected in the fixed block, a wiper rod is fixedly connected to one end of the pull rod close to the movable baffle, the wiper rod is in contact with the inner wall of the protective shell, a second spring is connected between the fixed block and the wiper rod, the second spring is sleeved on the pull rod, a through hole is opened on the fixed baffle, and the pull rod passes through the through hole.

[0023] Specifically, during use, when it is necessary to observe the position of the hand wheel, if the visibility of the protective shell is poor, pull the pull rod to move it away from the movable baffle, and the pull rod drives the wiper rod to move, and the wiper rod wipes the inside of the protective shell while compressing the second spring. After wiping is completed, release the pull rod, and the wiper rod resets under the action of the second spring.

[0024] By setting the processing part, the scraping rod can be moved by pulling the pull rod to scrape the inner wall of the protective shell, thereby improving the visibility of the protective shell and making it convenient for the user to observe the scale on the hand wheel.

[0025] Preferably, the protective shell is connected to the mounting shell through a sliding part, and the sliding part includes two sliding rails symmetrically fixedly connected to the two side surfaces of the mounting shell, and each of the sliding rails is slidably connected with a slider, and the two sliders are respectively fixedly connected to the two sides of the protective shell, and the two ends of the sliding rails are respectively fixedly connected with magnetic blocks, and the magnetic blocks can be magnetically attracted to the sliders.

[0026] Specifically, during use, when the protective shell abuts against the fixed baffle, the slider is magnetically attracted to the magnet at the upper end of the slide rail, so that the protective shell remains in contact with the fixed baffle; when the protective shell is opened, the slider is magnetically attracted to the magnet at the lower end of the slide rail, so that the protective shell remains in an open state; when the protective shell slides, the protective shell drives the slider to slide in the slide rail.

[0027] By setting the sliding member, the protective shell can slide on the mounting shell, and the closed and open states of the protective shell can be maintained through the magnetic attraction between the sliding block and the magnetic block.

[0028] Preferably, the mounting shell includes a shell, the hand wheel is rotatably arranged on the shell, a pulse generating mechanism is arranged inside the shell, the hand wheel is electrically connected to the pulse generating mechanism, and a handle is arranged at the upper end of the shell.

[0029] The beneficial effects of the present invention are:

[0030] 1. Through the setting of the protection mechanism, the protection shell, the fixed baffle and the movable baffle together form a protection layer to protect the handwheel installed on the mounting shell, reduce the dust and oil in the external environment from entering the pulse generator, improve the service life of the pulse generator and protect the accuracy of the use of the pulse generator.

[0031] 2. Through the setting of auxiliary parts, the upper closed ring and the lower closed ring can form a circular ring, closing the gap between the handwheel and the mounting shell, further preventing external dirt from entering the pulse generator, and improving the service life of the hand-cranked pulse generator. At the same time, through the elastic sliding setting of the upper closed ring, when the protective shell is opened, that is, when the handwheel needs to be adjusted, the upper closed ring and the lower closed ring can leave the gap between the handwheel and the mounting shell, so that the upper closed ring and the lower closed ring do not affect the subsequent adjustment action of the handwheel.

[0032] 3. Through the setting of the elastic sliding part, the upper closing ring can cooperate with the lower closing ring to close the gap between the hand wheel and the mounting shell, and after the protective shell is opened, it does not affect the rotation of the hand wheel. Through the setting of the rubber layer, the upper closing ring and the lower closing ring can more tightly close the gap between the hand wheel and the mounting shell.

[0033] 4. Through the setting of the processing part, the scraping rod can be moved by pulling the pull rod to scrape the inner wall of the protective shell, thereby improving the visibility of the protective shell and making it convenient for the user to observe the scale on the hand wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the hand wheel in the present invention;

[0035] Figure 2 It is a schematic diagram of the internal structure of the hand wheel in the present invention;

[0036] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention;

[0037] Figure 4 It is a front view of the present invention;

[0038] Figure 5 For the present invention Figure 4 Isometric section view at AA;

[0039] Figure 6 For the present invention Figure 3 A partial enlarged view of point B in the middle;

[0040] Figure 7 It is a right side view of the present invention;

[0041] Figure 8 For the present invention Figure 7 Isometric section view at mid-CC;

[0042] Fig. 9 For the present invention Figure 7 Isometric section view at mid DD;

[0043] Fig.10 For the present invention Fig. 9 A partial enlarged view of point E in the middle.

[0044] In the figure:

[0045] 1. Hand wheel; 2. Mounting shell;

[0046] 3. Protection mechanism; 31. Protection shell; 32. Fixed baffle; 33. Movable baffle; 34. Auxiliary part; 341. Lower closing ring; 342. Upper closing ring; 35. Elastic sliding part; 351. Slide groove; 352. Sliding block; 353. First spring; 354. Connecting rod; 36. Processing part; 361. Fixed block; 362. Pull rod; 363. Wiping rod; 364. Second spring; 365. Through hole; 37. Sliding part; 371. Slide rail; 372. Sliding block. DETAILED DESCRIPTION

[0047] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0048] In order to improve the feel of rotation and the texture of the clicking sound, 100 gear teeth are processed on the metal main frame, and permanent magnets are installed on the gears to make the entire gear magnetic. The 100 corresponding gears on the metal frame are evenly distributed. The gear teeth are magnetic on the self-resetting needle rollers. The NS magnetic principle is used to make the gear teeth and the main frame. The 100 magnetic self-resetting needle rollers generate magnetic flux lines to each other. The rotation accuracy of the gear spindle and the positioning accuracy after stopping can be accurately controlled during rotation in order to provide better position accuracy for the circuit hardware. The inner end face of the gear spindle is connected to a coaxial rotatable coaxial magnet with NS. When the spindle gear rotates, the coaxial magnet will rotate synchronously with the spindle gear. The corresponding PCB board is composed of a Hall chip, MCU and other electronic components. Through the principle of the change of the NS pole position of a coaxial magnet, the Hall chip will sense the change of the position angle of the magnet rotation, and the Hall element will output a position digital signal (SPI). This position digital signal is processed and shaped by the MCU software into a standard voltage signal output to achieve an AB orthogonal pulse signal. It also optimizes the inconsistent and non-standard duty cycle and phase difference of the orthogonal waveform, and improves the final problem by providing higher precision positioning of the spindle when it rotates and stops through the 100 self-resetting needle rollers in the mechanical structure.

[0049] like Figure 1 , 3 As shown in Figure 5, an embodiment of the present invention discloses a hand-cranked pulse generator of magnetic flux lines, including a handwheel 1, which is rotatably set on a mounting shell 2, and a protection mechanism 3 is slidably set on the mounting shell 2. The protection mechanism 3 includes a protection shell 31 slidably set on the mounting shell 2, and a fixed baffle 32 is fixedly connected to the mounting shell 2. An end of the protection shell 31 away from the fixed baffle 32 is fixedly connected to a movable baffle 33, and an end of the protection shell 31 away from the movable baffle 33 abuts against the fixed baffle 32.

[0050] Specifically, when in use, the end of the protective shell 31 abuts against the fixed baffle 32, and the fixed baffle 32, the protective shell 31, the movable baffle 33 and the mounting shell 2 together constitute a protective layer to protect the handwheel 1 installed on the mounting shell 2 and reduce the dust and oil in the external environment from entering the interior of the pulse generator; when the handwheel 1 needs to be adjusted, the protective shell 31 is slid downward so that the end of the protective shell 31 is disengaged from the fixed baffle 32, thereby exposing the handwheel 1, which is convenient for the user to adjust the handwheel 1. After the adjustment is completed, the protective shell 31 is slid again so that the end of the protective shell 31 abuts against the fixed baffle 32 to protect the handwheel 1.

[0051] By setting the protection mechanism 3, the protection shell 31, the fixed baffle 32 and the movable baffle 33 together form a protective layer to protect the handwheel 1 installed on the mounting shell 2, reduce the dust and oil in the external environment from entering the pulse generator, improve the service life of the pulse generator and protect the accuracy of the use of the pulse generator.

[0052] like Fig. 9 As shown, the protection mechanism 3 also includes an auxiliary part 34, which includes a semicircular lower closed ring 341 fixedly connected to the movable baffle 33, and an upper closed ring 342 is elastically slidably provided on the mounting shell 2, and the lower closed ring 341 is magnetically attracted to the end of the upper closed ring 342.

[0053] Specifically, during use, when the protective shell 31 abuts against the fixed baffle 32, the lower closed ring 341 absorbs the upper closed ring 342 through the magnetic effect, so that the lower closed ring 341 and the upper closed ring 342 form a circular ring, closing the gap between the handwheel 1 and the mounting shell 2, further preventing external dirt from entering the pulse generator; when the protective shell 31 moves away from the fixed baffle 32, the lower closed ring 341 leaves the gap between the handwheel 1 and the mounting shell 2, and the upper closed ring 342 is reset under the action of elastic force, so that the upper closed ring 342 leaves the gap between the handwheel 1 and the mounting shell 2, facilitating the subsequent adjustment and rotation of the handwheel 1.

[0054] By setting the auxiliary part 34, the upper closed ring 342 and the lower closed ring 341 can form a circular ring to close the gap between the handwheel 1 and the mounting shell 2, further preventing external dirt from entering the pulse generator and improving the service life of the hand-cranked pulse generator. At the same time, through the elastic sliding setting of the upper closed ring 342, when the protective shell 31 is opened, that is, when the handwheel 1 needs to be adjusted, the upper closed ring 342 and the lower closed ring 341 can leave the gap between the handwheel 1 and the mounting shell 2, so that the upper closed ring 342 and the lower closed ring 341 do not affect the subsequent adjustment action of the handwheel 1.

[0055] like Fig. 9 , 10 As shown, the upper closed ring 342 is connected to the mounting shell 2 via an elastic sliding member 35, and the elastic sliding member 35 includes two sliding grooves 351 symmetrically opened on the mounting shell 2, each of the sliding grooves 351 is slidably connected with a sliding block 352, and a first spring 353 is connected between each sliding block 352 and the sliding groove 351, and each sliding block 352 is fixedly connected to the upper closed ring 342 via a connecting rod 354.

[0056] Specifically, during use, when the upper closed ring 342 and the lower closed ring 341 are magnetically attracted to each other, the upper closed ring 342 drives the sliding block 352 to slide in the sliding groove 351 through the connecting rod 354, and the sliding block 352 stretches the first spring 353; when the lower closed ring 341 moves away, the sliding block 352 moves in the direction away from the hand wheel 1 under the action of the elastic force of the first spring 353, and the sliding block 352 drives the upper closed ring 341 to move through the connecting rod 354.

[0057] By setting the elastic sliding member 35, the upper closing ring 342 can cooperate with the lower closing ring 341 to close the gap between the hand wheel 1 and the mounting shell 2, and after the protective shell 31 is opened, the rotation of the hand wheel 1 is not affected.

[0058] Furthermore, the inner ring surfaces of the upper closed ring 342 and the lower closed ring 341 are both provided with a pad layer, and the pad layer is made of rubber material.

[0059] By providing the rubber layer, the upper sealing ring 342 and the lower sealing ring 341 can seal the gap between the hand wheel 1 and the mounting shell 2 more tightly.

[0060] Furthermore, the protective shell 31 is made of transparent material.

[0061] The protective shell 31 is made of a transparent material, so that the position of the hand wheel 1 can be observed easily.

[0062] like Figure 5 , 8 As shown, a processing part 36 is provided on the inner wall of one side of the protective shell 31 close to the hand wheel 1, and the processing part 36 includes a fixed block 361 fixedly connected to the protective shell 31, and a pull rod 362 is slidably connected in the fixed block 361, and a wiping rod 363 is fixedly connected to one end of the pull rod 362 close to the movable baffle 33, and the wiping rod 363 contacts the inner wall of the protective shell 31, and a second spring 364 is connected between the fixed block 361 and the wiping rod 363, and the second spring 364 is sleeved on the pull rod 362, and a through hole 365 is opened on the fixed baffle 32, and the pull rod 362 passes through the through hole 365.

[0063] Specifically, during use, when it is necessary to observe the position of the hand wheel 1, if the visibility of the protective shell 31 is poor, pull the pull rod 362 to move the pull rod 362 away from the movable baffle 33, and the pull rod 362 drives the wiper rod 363 to move. The wiper rod 363 wipes the inside of the protective shell 31 and compresses the second spring 364 at the same time. After wiping is completed, release the pull rod 362, and the wiper rod 363 is reset under the action of the second spring 364.

[0064] By setting the processing member 36 , the pulling rod 362 can be pulled to move the scraping rod 363 to scrape the inner wall of the protective shell 31 , thereby improving the visibility of the protective shell 31 and making it convenient for the user to observe the scale on the hand wheel 1 .

[0065] like Figure 5 , 6 As shown, the protective shell 31 is connected to the mounting shell 2 through a sliding member 37. The sliding member 37 includes two sliding rails 371 symmetrically fixedly connected to the two side surfaces of the mounting shell 2. A slider 372 is slidably connected in each of the sliding rails 371. The two sliders 372 are respectively fixedly connected to the two sides of the protective shell 31. The two ends of the sliding rails 371 are respectively fixedly connected with magnetic blocks, and the magnetic blocks can be magnetically attracted to the sliders 372.

[0066] Specifically, during use, when the protective shell 31 abuts against the fixed baffle 32, the slider 372 is magnetically attracted to the magnetic block at the upper end of the slide rail 371, so that the protective shell 31 remains in contact with the fixed baffle 32; when the protective shell 31 is opened, the slider 372 is magnetically attracted to the magnetic block at the lower end of the slide rail 371, so that the protective shell 31 remains in an open state; when the protective shell 31 slides, the protective shell 31 drives the slider 372 to slide in the slide rail 371.

[0067] By setting the sliding member 37, the protective shell 31 can slide on the mounting shell 2, and the closed and open states of the protective shell 31 can be maintained through the magnetic attraction between the slider 372 and the magnetic block.

[0068] like Figure 3 As shown, the mounting shell 2 includes a shell, the hand wheel 1 is rotatably arranged on the shell, a pulse generating mechanism is arranged inside the shell, the hand wheel 1 is electrically connected to the pulse generating mechanism, and a handle is arranged at the upper end of the shell.

[0069] Furthermore, the pulse generating mechanism and the hand wheel 1 are prior art and will not be described in detail.

[0070] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0071] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0073] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A hand-cranked pulse generator of magnetic flux lines, characterized in that: The invention comprises a hand wheel (1), the hand wheel (1) being rotatably arranged on a mounting shell (2), a protective mechanism (3) being slidably arranged on the mounting shell (2), the protective mechanism (3) comprising a protective shell (31) being slidably arranged on the mounting shell (2), a fixed baffle (32) being fixedly connected to the mounting shell (2), a movable baffle (33) being fixedly connected to one end of the protective shell (31) away from the fixed baffle (32), and an end of the protective shell (31) away from the movable baffle (33) being in contact with the fixed baffle (32).

2. A hand-cranked pulse generator of magnetic flux lines according to claim 1, characterized in that: The protection mechanism (3) further comprises an auxiliary component (34), the auxiliary component (34) comprising a semicircular lower closed ring (341) fixedly connected to the movable baffle (33), an upper closed ring (342) elastically slidably provided on the mounting shell (2), and the ends of the lower closed ring (341) and the upper closed ring (342) are magnetically attracted to each other.

3. A hand-cranked pulse generator of magnetic flux lines according to claim 2, characterized in that: The upper closed ring (342) is connected to the mounting shell (2) via an elastic sliding member (35), and the elastic sliding member (35) includes two sliding grooves (351) symmetrically arranged on the mounting shell (2), each of the sliding grooves (351) is slidably connected with a sliding block (352), and a first spring (353) is connected between each of the sliding blocks (352) and the sliding groove (351), and each of the sliding blocks (352) is fixedly connected to the upper closed ring (342) via a connecting rod (354).

4. A hand-cranked pulse generator of magnetic flux lines according to claim 3, characterized in that: The inner ring surfaces of the upper closed ring (342) and the lower closed ring (341) are both provided with a pad layer, and the pad layer is made of rubber material.

5. A hand-cranked pulse generator of magnetic flux lines according to claim 4, characterized in that: The protective shell (31) is made of a transparent material.

6. A hand-cranked pulse generator of magnetic flux lines according to claim 5, characterized in that: A processing part (36) is provided on the inner wall of one side of the protective shell (31) close to the hand wheel (1), and the processing part (36) includes a fixed block (361) fixedly connected to the protective shell (31), a pull rod (362) is slidably connected in the fixed block (361), and a wiping rod (363) is fixedly connected to one end of the pull rod (362) close to the movable baffle (33), and the wiping rod (363) contacts the inner wall of the protective shell (31), and a second spring (364) is connected between the fixed block (361) and the wiping rod (363), and the second spring (364) is sleeved on the pull rod (362), and a through hole (365) is opened on the fixed baffle (32), and the pull rod (362) passes through the through hole (365).

7. A hand-cranked pulse generator of magnetic flux lines according to claim 6, characterized in that: The protective shell (31) is connected to the mounting shell (2) via a sliding member (37); the sliding member (37) comprises two sliding rails (371) symmetrically fixedly connected to two side surfaces of the mounting shell (2); a slider (372) is slidably connected to each of the sliding rails (371); the two sliders (372) are respectively fixedly connected to two sides of the protective shell (31); and magnetic blocks are respectively fixedly connected to both ends of the sliding rails (371); the magnetic blocks are capable of magnetic attraction to the sliders (372).

8. A hand-cranked pulse generator of magnetic flux lines according to claim 7, characterized in that: The mounting shell (2) comprises a shell, the hand wheel (1) is rotatably mounted on the shell, a pulse generating mechanism is arranged inside the shell, the hand wheel (1) is electrically connected to the pulse generating mechanism, and a handle is arranged at the upper end of the shell.

Images