A financial teaching display device capable of automatically displaying teaching materials for easy comparison

Abstract

The present invention is applicable to the technical field of financial teaching devices, and provides a financial teaching display device capable of automatically displaying teaching materials for convenient comparison, including a display unit. The display unit includes a mounting base, a mounting shaft, a mounting column, a first telescopic rod, a mounting plate and a suction cup. The mounting base is mounted on the frame, and a side-by-side display assembly is mounted on the front side of the frame. The side-by-side display assembly includes a sliding seat, a flexible belt and a flexible connecting piece. The financial teaching display device capable of automatically displaying teaching materials for convenient comparison provided by the present invention can drive the mounting column to rotate through a power assembly by setting the mounting base, the mounting shaft, the mounting column, the first telescopic rod, the mounting plate and the suction cup. The mounting column drives the next teaching template to rotate to the teaching position. By synchronously extending or shortening multiple first telescopic rods, the distance between adjacent two mounting plates can be adjusted, teaching templates with different width dimensions can be installed, the adaptability can be improved, and various teaching modes can be carried out, and the teaching effect is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of financial teaching devices, and particularly relates to a financial teaching display device that can automatically display teaching materials for convenient comparison. Background Art

[0002] Financial teaching is specifically for the education and learning of financial majors. When teaching financial majors, teaching devices are needed.

[0003] After retrieval, Chinese invention patent CN113903222B discloses a financial teaching display device that can automatically display teaching materials for convenient comparison, including a display board, which is the main teaching display body for financial teaching. A column is fixedly arranged at the bottom of the display board; a twist pressing rod passes through the outer surface of the display board, and a support spring is fixedly connected to the end of the pressing rod, and the end of the support spring is fixedly arranged inside the display board.

[0004] In the above-mentioned prior art, multiple teaching templates are stacked and then displayed one by one. However, there are also some problems: when the width of different teaching templates becomes larger, the device cannot make adaptive adjustments, and it can only be displayed one by one according to the stacking order, and the teaching templates cannot be selected. Summary of the Invention

[0005] The present invention provides a financial teaching display device that can automatically display teaching materials for convenient comparison, aiming to solve the above problems.

[0006] The present invention is implemented as follows. A financial teaching display device that can automatically display teaching materials for convenient comparison includes a display unit, and the display unit includes:

[0007] A mounting base;

[0008] A vertical mounting shaft rotatably mounted on the mounting base. An installation column is fixed at the top of the mounting shaft, and a power assembly for driving the mounting shaft to rotate is mounted on the mounting base;

[0009] Multiple first telescopic rods circumferentially and equally spaced and fixed on the installation column, and the telescopic direction of the first telescopic rods is along the radial direction of the installation column;

[0010] A mounting plate fixed to the end of the first telescopic rod away from the installation column. Multiple suction cups are respectively mounted on both sides of the first telescopic rod on the outer side of the mounting plate for adsorbing and fixing teaching templates.

[0011] Preferably, the suction cups on the adjacent ends of adjacent two mounting plates are all connected to a vacuum pump through a flexible air pipe, and the vacuum pump is fixedly mounted on the outer side wall of the installation column.

[0012] Preferably, the power assembly includes:

[0013] The first friction wheel fixed on the mounting shaft;

[0014] The third stepping motor fixed on the mounting base and located on one side of the mounting shaft. A second friction wheel is fixed on the output shaft of the third stepping motor, and the second friction wheel is arranged at an interval from the first friction wheel;

[0015] The driving friction wheel arranged between the first friction wheel and the second friction wheel, and the driving friction wheel can form friction pairs with both the first friction wheel and the second friction wheel.

[0016] Preferably, the mounting base is mounted on the frame, and a side-by-side display assembly is mounted on the front side of the frame. The side-by-side display assembly includes:

[0017] The sliding seats mounted on both side walls of the frame;

[0018] Two flexible belts connected between the top and bottom ends of the sliding seats. Flexible connectors are fixedly arranged on the inner sides of the flexible belts, and the flexible connectors on the two flexible belts are respectively connected and matched with the fittings fixed at the top and bottom ends of the teaching template.

[0019] Preferably, a tension sensor is connected between the flexible belt and the sliding seat, and the tension sensor is electrically connected to the second stepping motor.

[0020] Preferably, the side-by-side display assembly further includes:

[0021] The second lead screw arranged longitudinally and rotatably mounted on both side walls of the frame. The second lead screw penetrates through the sliding seat and is threadedly connected therewith, and the sliding seat is slidably connected to the frame;

[0022] The second stepping motor fixedly connected to one end of the second lead screw. The second stepping motor is fixed on the frame, and the tension sensor is electrically connected to the second stepping motor.

[0023] Preferably, the mounting base is horizontally slidably mounted on the bottom of the frame, and a driving assembly for driving the mounting base to slide horizontally is mounted on the frame.

[0024] Preferably, the driving assembly includes:

[0025] The first lead screw arranged horizontally and rotatably mounted on the bottom of the frame. The first lead screw penetrates through the mounting base and is threadedly connected therewith;

[0026] The first stepping motor fixed on the frame for driving the first lead screw to rotate. The output shaft of the first stepping motor can be fixedly connected to the first lead screw through a coupling.

[0027] Preferably, an installation rod is rotatably installed on the installation shaft, the transmission friction wheel is rotatably installed at one end of the installation rod, a second telescopic rod is provided at the other end of the installation rod, one end of the second telescopic rod is hinged to the upper surface of the installation seat, and the other end is hinged to the other end of the installation rod. A friction strip is provided on one side of the transmission friction wheel opposite to the first friction wheel. The friction strip is horizontally arranged and both ends are fixedly connected to the two side walls of the frame. When the transmission friction wheel forms a friction pair with the first friction wheel and the second friction wheel respectively, the transmission friction wheel is separated from the friction strip. When the transmission friction wheel forms a friction pair with the first friction wheel and the friction strip respectively, the transmission friction wheel is separated from the second friction wheel.

[0028] Preferably, a fixed rod is coaxially arranged in the installation column. The fixed rod is rotatably connected to the top end of the installation column. The top end of the fixed rod is fixedly connected to the slider. The slider is horizontally slidably connected to the top of the frame. An infrared emitter is fixed at the middle position of the front side wall of the fixed rod. A plurality of infrared receivers are circumferentially and equally spaced and fixedly arranged on the inner cavity side wall of the installation column. The number of infrared receivers is equal to that of the vacuum pumps and they are electrically connected in one-to-one correspondence. The tension sensor is electrically connected to the infrared emitter.

[0029] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0030] The financial teaching display device provided by the present invention that can automatically display teaching materials for easy comparison is provided with an installation seat, an installation shaft, an installation column, a first telescopic rod, an installation plate and a suction cup. By driving the installation column to rotate through the power assembly, the installation column drives the next teaching template to rotate to the teaching position. By synchronously extending or shortening multiple first telescopic rods, the distance between adjacent two installation plates can be adjusted, and teaching templates with different width dimensions can be installed, improving adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is the front view of a financial teaching display device provided by the present invention that can automatically display teaching materials for easy comparison;

[0032] Figure 2 is the top view of a financial teaching display device provided by the present invention that can automatically display teaching materials for easy comparison;

[0033] Figure 3 is the top view of the display unit in a financial teaching display device provided by the present invention that can automatically display teaching materials for easy comparison;

[0034] Figure 4 is Figure 1 the partial enlarged view in;

[0035] Figure 5It is a state change diagram of the first friction wheel, the second friction wheel, the driving friction wheel, and the friction strip in a financial teaching display device provided by the present invention that can automatically display teaching materials for convenient comparison.

[0036] Annotation of reference numerals: 1. First telescopic rod; 2. Mounting plate; 3. Suction cup; 4. Air pipe; 5. Vacuum pump; 6. Mounting column; 7. Teaching template; 8. Fixed rod; 9. Infrared receiver; 10. Infrared emitter; 11. First lead screw; 12. First stepping motor; 13. Second stepping motor; 14. Second lead screw; 15. Slide seat; 16. Tensile sensor; 17. Flexible connecting piece; 18. Flexible belt; 19. Frame; 20. Friction strip; 21. Slide block; 22. Mounting seat; 23. Third stepping motor; 24. First friction wheel; 25. Second friction wheel; 26. Second telescopic rod; 27. Mounting rod; 28. Driving friction wheel. Detailed implementation manners

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the description of this application in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and are not used to describe a specific order.

[0038] Referring to "embodiments" herein means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0039] An embodiment of the present invention provides a financial teaching display device that can automatically display teaching materials for convenient comparison, as Figures 1 - 5 shown, including a display unit, and the display unit includes:

[0040] Mounting seat 22;

[0041] A vertical mounting shaft rotatably mounted on the mounting seat 22, with a mounting column 6 fixed to the top of the mounting shaft, which can be fixed by welding, and a power assembly for driving the mounting shaft to rotate is mounted on the mounting seat 22;

[0042] A plurality of first telescopic rods 1 circumferentially and equally spaced and fixed to the mounting column 6 can be electric push rods or hydraulic rods, and the telescopic direction of the first telescopic rods 1 is along the radial direction of the mounting column 6;

[0043] The mounting plate 2 fixed to one end of the first telescopic rod 1 away from the mounting column 6, and a plurality of suction cups 3 are respectively installed on both sides of the first telescopic rod 1 on the outer side of the mounting plate 2 for adsorbing and fixing the teaching template 7.

[0044] During teaching, a teaching template 7 is installed between the adjacent ends of each group of adjacent two mounting plates 2 through the suction cups 3. After explaining one teaching template 7, the mounting column 6 is driven to rotate by the power assembly, and the mounting column 6 drives the next teaching template 7 to rotate to the teaching position. The adjacent two mounting plates 2 can be adjusted in distance by synchronously extending or shortening the plurality of first telescopic rods 1, so that teaching templates 7 with different width dimensions can be installed, improving adaptability.

[0045] Among them, the suction cups 3 on the adjacent ends of the two adjacent mounting plates 2 are all connected to a vacuum pump 5 through a flexible air pipe 4, and the vacuum pump 5 is fixedly installed on the outer side wall of the mounting column 6 and can be fixed by screws. When installing the teaching template 7, the vacuum pump 5 works to generate a vacuum, and cooperates with the suction cups 3 to adsorb and fix the teaching template 7. When the teaching template 7 needs to be removed, the suction cups 3 lose vacuum.

[0046] In this embodiment, the power assembly includes:

[0047] The first friction wheel 24 fixed to the mounting shaft can be fixed by screws;

[0048] The third stepping motor 23 fixed to the mounting seat 22 and located on one side of the mounting shaft can be fixed by bolts. A second friction wheel 25 is fixed to the output shaft of the third stepping motor 23, and the second friction wheel 25 and the first friction wheel 24 are arranged at intervals;

[0049] The driving friction wheel 28 arranged between the first friction wheel 24 and the second friction wheel 25 can form a friction pair with both the first friction wheel 24 and the second friction wheel 25. When the third stepping motor 23 is started, the third stepping motor 23 drives the second friction wheel 25 to rotate, and the second friction wheel 25 drives the first friction wheel 24 to rotate through the driving friction wheel 28. The first friction wheel 24 drives the mounting column 6 to rotate through the mounting shaft. Rubber rings can be arranged on the circumferential walls of the first friction wheel 24, the second friction wheel 25 and the third friction wheel to increase the friction force, and anti-slip patterns or anti-slip points are arranged on the surface of the rubber rings.

[0050] In a specific implementation, the mounting seat 22 is installed on the frame 19, and a side-by-side display assembly is installed on the front side of the frame 19. The side-by-side display assembly includes:

[0051] Sliding seats 15 installed on both side walls of the frame 19;

[0052] Two flexible belts 18 connected between the top and bottom of the sliding seat 15. Flexible connectors 17, such as flexible magnetic stickers or Velcro, are fixedly arranged on the inner side surfaces of the flexible belts 18. The flexible connectors 17 on the two flexible belts 18 are respectively connected and matched with the fittings fixed at the top and bottom of the teaching template 7;

[0053] Multiple teaching templates 7 can be installed side by side between the two flexible belts 18, facilitating the comparative teaching mode.

[0054] Furthermore, a tension sensor 16 is connected between the flexible belt 18 and the sliding seat 15, and the tension sensor 16 can be fixedly connected to the flexible belt 18 and the sliding seat 15 respectively by screws.

[0055] Even further, the side-by-side display assembly further includes:

[0056] A second lead screw 14 longitudinally arranged and rotatably installed on both side walls of the frame 19. It can be rotatably installed through bearings and bearing seats. The second lead screw 14 passes through the sliding seat 15 and is threadedly connected thereto. The sliding seat 15 is slidably connected to the frame 19;

[0057] A second stepping motor 13 fixedly connected to one end of the second lead screw 14. The second stepping motor 13 is fixed on the frame 19 and can be fixed by bolts. The tension sensor 16 is electrically connected to the second stepping motor 13. The output shaft of the second stepping motor 13 can be fixedly connected to one end of the second lead screw 14 through a coupling;

[0058] By driving the second lead screw 14 to rotate through the second stepping motor 13, the second lead screw 14 drives the sliding seat 15 to move, and the sliding seat 15 drives the flexible belt 18 to move, enabling the position of the flexible belt 18 to be adjusted.

[0059] Preferably, the mounting seat 22 is horizontally slidably installed at the bottom of the frame 19, and a driving assembly for driving the mounting seat 22 to slide horizontally is installed on the frame 19.

[0060] In this embodiment, the driving assembly includes:

[0061] A first lead screw 11 horizontally arranged and rotatably installed at the bottom of the frame 19. It can be rotatably installed through a bearing. The first lead screw 11 passes through the mounting seat 22 and is threadedly connected thereto;

[0062] A first stepping motor 12 fixed on the frame 19 for driving the first lead screw 11 to rotate. It can be fixed by bolts. The output shaft of the first stepping motor 12 can be fixedly connected to the first lead screw 11 through a coupling.

[0063] Start the first stepping motor 12. The first stepping motor 12 drives the first lead screw 11 to rotate, and the first lead screw 11 drives the mounting seat 22 to move.

[0064] Further, an installation rod 27 is rotatably installed on the installation shaft. The driving friction wheel 28 is rotatably installed at one end of the installation rod 27. A second telescopic rod 26 is provided at the other end of the installation rod 27. One end of the second telescopic rod 26 is hinged to the upper surface of the mounting seat 22, and the other end is hinged to the other end of the installation rod 27. A friction strip 20 is provided on one side of the driving friction wheel 28 opposite to the first friction wheel 24. The friction strip 20 is horizontally arranged and its two ends are respectively fixedly connected to the two side walls of the frame 19. When the driving friction wheel 28 forms a friction pair with the first friction wheel 24 and the second friction wheel 25 respectively, the driving friction wheel 28 is separated from the friction strip 20. When the driving friction wheel 28 forms a friction pair with the first friction wheel 24 and the friction strip 20 respectively, the driving friction wheel 28 is separated from the second friction wheel 25.

[0065] In this embodiment, a fixing rod 8 is coaxially arranged in the mounting column 6. The fixing rod 8 is rotatably connected to the top end of the mounting column 6, and can be rotatably connected through a bearing. The top end of the fixing rod 8 is fixedly connected to the slider 21. The slider 21 is horizontally slidably connected to the top of the frame 19. An infrared emitter 10 is fixedly installed at the middle position of the front side wall of the fixing rod 8. A plurality of infrared receivers 9 are circumferentially and equally spaced and fixedly installed on the inner cavity side wall of the mounting column 6, and can be fixed by screws. The number of the infrared receivers 9 is equal to that of the vacuum pumps 5 and they are electrically connected in one-to-one correspondence. The tension sensor 16 is electrically connected to the infrared emitter 10.

[0066] When the comparative teaching mode is required, the second stepping motor 13 drives the second lead screw 14 to rotate. The second lead screw 14 drives the slide seat 15 to move, and the slide seat 15 drives the two flexible belts 18 to approach and press against the teaching template 7. When the value of the tension sensor 16 exceeds the set value, the second stepping motor 13 stops and the infrared emitter 10 is turned on. Then, the second telescopic rod 26 extends, and the second telescopic rod 26 drives the mounting rod 27 to rotate. The mounting rod 27 drives the driving friction wheel 28 to move to form friction pairs with the first friction wheel 24 and the friction strip 20 respectively. Then, the first stepping motor 12 drives the first lead screw 11 to rotate, and the first lead screw 11 drives the mounting seat 22 to move. The mounting seat 22 drives the mounting column 6 and the driving friction wheel 28 to move. The relative movement between the driving friction wheel 28 and the friction strip 20 causes the driving friction wheel 28 to rotate. The driving friction wheel 28 drives the first friction wheel 24 to rotate, the first friction wheel 24 drives the mounting column 6 to rotate, and the mounting column 6 drives the teaching template 7 to move. Thus, the teaching templates 7 are automatically installed on the two flexible belts 18 one by one through the flexible connectors 17, facilitating comparative teaching. When an infrared receiver 9 is directly opposite to the infrared emitter 10, the vacuum pump 5 corresponding to the infrared receiver 9 is communicated with the atmosphere, and the suction cup 3 loses vacuum and releases the teaching template 7. A two-way two-position solenoid valve and a three-way joint can be installed in front of the air inlet of the vacuum pump 5. When the bypass is shut off, the vacuum pump 5 sucks air from the suction cup 3. When the bypass is communicated with the atmosphere, the atmosphere enters the suction cup 3, and the suction cup 3 loses vacuum. Initially, it is preferably that the mounting column 6 is located at one end of the frame 19 and moves from one end to the other end.

[0067] In summary, the present invention provides a financial teaching display device that can automatically display teaching materials for easy comparison, which has two working modes, specifically:

[0068] Single-piece teaching mode: A teaching template 7 is installed between the adjacent ends of each group of adjacent mounting plates 2 through the suction cup 3. After explaining one teaching template 7, the driving component drives the mounting column 6 to rotate, and the mounting column 6 drives the next teaching template 7 to rotate to the teaching position.

[0069] Comparison teaching mode: The second lead screw 14 is driven to rotate by the second stepping motor 13. The second lead screw 14 drives the slide block 15 to move. The slide block 15 drives the two flexible belts 18 to approach the teaching template 7 and press against it. When the value of the tension sensor 16 exceeds the set value, the second stepping motor 13 stops and the infrared emitter 10 is turned on. Then, the second telescopic rod 26 extends. The second telescopic rod 26 drives the mounting rod 27 to rotate. The mounting rod 27 drives the transmission friction wheels 28 to move to form friction pairs with the first friction wheel 24 and the friction strip 20 respectively. Then, the first stepping motor 12 drives the first lead screw 11 to rotate. The first lead screw 11 drives the mounting seat 22 to move. The mounting seat 22 drives the mounting column 6 and the transmission friction wheels 28 to move. The relative movement between the transmission friction wheel 28 and the friction strip 20 causes the transmission friction wheel 28 to rotate. The transmission friction wheel 28 drives the first friction wheel 24 to rotate. The first friction wheel 24 drives the mounting column 6 to rotate. The mounting column 6 drives the teaching template 7 to move. Thus, the teaching template 7 is automatically installed on the two flexible belts 18 one by one through the flexible connector 17.

[0070] It should be noted that for the foregoing embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0071] In the embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0072] The units described as separate components above may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the invention. Obviously, the described embodiments are only partial embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict and without creative efforts, combine, add or delete the features in the embodiments of the present invention according to the circumstances or make other adjustments, so as to obtain different technical solutions that essentially do not deviate from the concept of the present invention, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A financial teaching display device capable of automatically displaying teaching materials for easy comparison, including a display unit, characterized in that, The display unit includes: A mounting base; A vertical mounting shaft rotatably mounted on the mounting base. An installation column is fixed to the top end of the mounting shaft. A power component for driving the mounting shaft to rotate is mounted on the mounting base; A plurality of first telescopic rods circumferentially and equally spaced and fixed on the installation column. The telescopic direction of the first telescopic rod is along the radial direction of the installation column; A mounting plate fixed to the end of the first telescopic rod away from the installation column. A plurality of suction cups are respectively mounted on both sides of the first telescopic rod on the outer side of the mounting plate for adsorbing and fixing the teaching template; The power component includes: A first friction wheel fixed to the mounting shaft; A third stepping motor fixed to the mounting base and located on one side of the mounting shaft. A second friction wheel is fixed to the output shaft of the third stepping motor; A transmission friction wheel disposed between the first friction wheel and the second friction wheel. The transmission friction wheel can form a friction pair with both the first friction wheel and the second friction wheel; The mounting base is horizontally slidably mounted on the bottom of the frame. A side-by-side display component is mounted on the front side of the frame, which includes: Sliding seats slidably mounted on both side walls of the frame; Two flexible belts connected between the top end and the bottom end of the sliding seat. Flexible connectors are fixed on the inner side surface of the flexible belt; Second lead screws longitudinally arranged and rotatably mounted on both side walls of the frame. The second lead screws penetrate through the sliding seats and are threadedly connected thereto; A driving component for driving the mounting base to slide horizontally is mounted on the frame, which includes a first lead screw horizontally arranged and rotatably mounted on the bottom of the frame. The first lead screw penetrates through the mounting base and is threadedly connected thereto; A mounting rod is rotatably mounted on the mounting shaft. The transmission friction wheel is rotatably mounted at one end of the mounting rod. A second telescopic rod is provided at the other end of the mounting rod. One end of the second telescopic rod is hinged to the upper surface of the mounting base, and the other end is hinged to the other end of the mounting rod. A friction strip is fixed on the side of the transmission friction wheel opposite to the first friction wheel.

2. The financial teaching display device capable of automatically displaying teaching materials for easy comparison according to claim 1, characterized in that, The suction cups on the adjacent ends of adjacent two mounting plates are all connected to a vacuum pump through a flexible air pipe. The vacuum pump is fixedly mounted on the outer side wall of the installation column.

3. The financial teaching display device capable of automatically displaying teaching materials for easy comparison as described in claim 1, wherein A tension sensor is connected between the flexible belt and the sliding seat. The tension sensor is electrically connected to the second stepping motor.

4. The financial teaching display device capable of automatically displaying teaching materials for easy comparison according to claim 3, characterized in that, A fixed rod is coaxially arranged inside the installation column. The fixed rod is rotatably connected to the top end of the installation column. The top end of the fixed rod is fixedly connected to a slider. The slider is horizontally slidably connected to the top of the frame. An infrared emitter is fixed at the middle position of the front side wall of the fixed rod. A plurality of infrared receivers are circumferentially and equally spaced and fixed on the inner cavity side wall of the installation column. The number of the infrared receivers is equal to that of the vacuum pumps and they are electrically connected in one-to-one correspondence. The tension sensor is electrically connected to the infrared emitter.

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