Electrocardiogram teaching equipment

Abstract

The present invention relates to the technical field of teaching tools, in particular to an electrocardiogram teaching tool, comprising a support frame, wherein a display frame and a projector are fixedly installed at both ends of the support frame respectively, a projection screen is fixedly connected to a side of the display frame close to the projector, a connecting roller is arranged below the display frame, a plurality of limit strips are arranged on the surface of the connecting roller along the circumferential direction, and a transparent display board is arranged on a side of the limit strip away from the connecting roller; the present invention projects a projection image of the projector through the transparent display board onto the projection screen, so that after the electrocardiogram patterns on the projection screen and the transparent display board are in contact and attached, the same positions and different positions of the two electrocardiogram patterns are observed, thereby enhancing the differentiated display between the two electrocardiogram patterns, and improving the teaching effect of electrocardiogram teaching by comparative learning.

Description

Technical Field

[0001] The invention relates to the technical field of teaching tools, in particular to an electrocardiogram teaching tool. Background Art

[0002] Electrocardiogram is a technology that uses an electrocardiograph to record the changes in electrical activity generated by the heart during each cardiac cycle from the body surface. The heart is a three-dimensional structure composed of countless myocardial cells. The heart will generate many electric dipole vectors in different directions during depolarization and repolarization. The electric dipole vectors in different directions are integrated into one vector to form the comprehensive electrocardiogram vector of the entire heart.

[0003] The patent document with publication number CN116741021A discloses an electrocardiogram teaching device, including a first support plate, universal wheels are evenly fixedly connected to the four sides of the bottom end of the first support plate, a box is fixedly connected to the center position of the upper surface of the first support plate, a lifting device is arranged inside the box, a second support plate is fixedly connected to the top of the lifting device, a positioning block is fixedly connected to the left end of the upper surface of the second support plate, a rotating rod is rotatably connected to the right end of the outer surface of the positioning block, and an angle adjustment device for driving the rotating rod to rotate is arranged at the right end of the outer surface of the second support plate.

[0004] In the prior art, when teaching electrocardiograms, a display board is usually used to display and teach the band graphs of the electrocardiogram. The electrocardiogram graphs of different types of patients differ in the composition of each wave and band. Conventional electrocardiogram teaching instruments are difficult to distinguish and compare the differences between the electrocardiogram graphs, thereby affecting the differentiated display between the electrocardiogram graphs and reducing the teaching effect of the electrocardiogram teaching. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an electrocardiogram teaching device.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: an electrocardiogram teaching device, comprising a support frame, a display frame and a projector are fixedly installed at both ends of the support frame, a projection screen is fixedly connected to a side of the display frame close to the projector, a connecting roller is arranged below the display frame, a plurality of limit strips are arranged on the surface of the connecting roller along the circumferential direction, a transparent display board is arranged on the side of the limit strip away from the connecting roller, and a plurality of the transparent display boards respectively have different types of electrocardiogram graphs, and a positioning mechanism is connected between the limit strip and the corresponding transparent display board;

[0007] The support frame is fixedly connected to a mounting bracket, the connecting roller is located inside the mounting bracket, a synchronous rotation mechanism is connected between the connecting roller and the limiting strip, and a driving lifting mechanism is connected to the mounting bracket, through which the transparent display board on the top of the connecting roller is driven to rise vertically and contact and fit with the projection screen.

[0008] Preferably, the synchronous rotation mechanism includes a rotating shaft, which is rotatably connected to the inside of the mounting bracket, the connecting roller is fixedly connected to the rotating shaft, a plurality of strip grooves are provided on the surface of the connecting roller, one side of the limit strips are located inside the corresponding strip grooves, one end of the connecting roller is fixedly connected to a retaining ring, one end of a plurality of the limit strips are in contact with the retaining ring, the other end of the connecting roller is provided with a limit ring, the limit ring is fixedly connected to the mounting bracket, the other ends of the plurality of limit strips are slidably connected to the limit ring, and the rotating shaft is connected to a driving rotation mechanism.

[0009] Preferably, the driving rotation mechanism includes a first motor, which is fixedly mounted on the mounting bracket. The output shaft of the first motor passes through the mounting bracket and extends to the interior of the mounting bracket and is fixedly connected to a driving gear. A matching gear is fixedly connected to the rotating shaft, and the driving gear and the matching gear are meshed with each other.

[0010] Preferably, the driving lifting mechanism includes a bar frame, which is fixedly connected to the mounting bracket, and a movable notch is opened on the top of the limiting ring, and an arc-shaped matching strip is arranged inside the movable notch, and one end of the limiting strip located on the top surface of the connecting roller is slidably connected to the arc-shaped matching strip, and a lifting strip is slidably connected inside the bar frame, and the arc-shaped matching strip is fixedly connected to the lifting strip, and two fixing plates are fixedly connected to one side of the bar frame, and a lead screw is rotatably connected between the two fixing plates, and a connecting ring is fixedly connected to the lifting strip, and the connecting ring is threadedly connected to the lead screw, and a second motor is fixedly installed on the fixing plate located above, and an output shaft of the second motor is fixedly connected to the top end of the lead screw, and a vertical limiting mechanism is connected to the bar frame.

[0011] Preferably, the vertical limiting mechanism includes a vertical bar, which is arranged on a side of the bar frame close to the connecting roller, and the upper and lower ends of the vertical bar are fixedly connected to fixed bars, and the fixed bars are fixedly connected to two first limiting pins, and the first limiting pins are slidably inserted on the bar frame, and the arc-shaped matching bar is provided with a first limiting groove, and the limit bar is provided with a second limiting groove at one end close to the vertical bar, the lifting bar is fixedly connected with a circular pin, and the vertical bar is provided with a guide groove, the guide groove includes a vertical section and an inclined section, the inclined section is located at the bottom of the vertical section, the circular pin is located at the inner bottom of the inclined section, and the circular pin is slidably connected to the inside of the guide groove.

[0012] Preferably, two contact rollers are rotatably connected inside the second limiting groove.

[0013] Preferably, the positioning mechanism includes an installation groove, which is opened on a side of the limit bar close to the transparent display plate, and one side of the transparent display plate is located inside the installation groove. Two limit bolts are arranged on the side of the limit bar, and one end of the limit bolt passes through the limit bar and the transparent display plate and is threadedly connected with a nut.

[0014] Preferably, the transparent display board and the projection screen have the same length, and the transparent display board is made of acrylic board.

[0015] Preferably, a cleaning frame is provided below the projection screen, the cleaning frame is fixedly connected to the supporting frame, and wiping cotton strips are fixedly connected to both sides of the cleaning frame.

[0016] Preferably, guide abutment plates are provided at both ends of the display frame close to the projection screen, and plug-in strips are fixedly connected to both ends of the display frame. Two second limit pins are fixedly connected to the guide abutment plates, and the second limit pins are slidably inserted on the corresponding plug-in strips. A spring is sleeved on the second limit pin, and the spring is fixedly connected between the corresponding plug-in strip and one end of the second limit pin away from the guide abutment plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the projection screen and the corresponding transparent display board are in contact and fit, the same position of the electrocardiogram graph projected on the projection screen and the electrocardiogram graph on the transparent display board overlaps, and the different positions of the electrocardiogram graph are projected onto the projection screen through the transparent display board through the projection image of the projector. Therefore, after the electrocardiogram graphs on the projection screen and the transparent display board are in contact and fit, the same positions and different positions of the two electrocardiogram graphs can be observed, which enhances the differentiated display between the two electrocardiogram graphs and improves the teaching effect of electrocardiogram teaching through comparative learning.

[0019] 2. The output shaft of the second motor drives the lead screw to rotate, and through the threaded connection between the lead screw and the connecting ring, the connecting ring drives the lifting bar to move vertically upward along the sliding connection of the strip frame, thereby driving the arc-shaped matching bar to move vertically upward, and the limit bar that is rotationally limited on the arc-shaped matching bar moves upward, so that the corresponding transparent display board on the limit bar rises synchronously. When the arc-shaped matching bar drives the corresponding limit bar to rise, the rise of the limit bar is vertically limited by the vertical limit mechanism.

[0020] 3. After the circular pin moves from the inclined section to the vertical section, one side of the limit bar disengages from the corresponding strip groove on the surface of the connecting roller, thereby ensuring that the limit bar is always vertically limited. When the lifting bar moves downward along the sliding connection of the strip frame and returns to the initial position, the arc-shaped matching bar moves back to the inside of the movable notch. Under the guidance of the inclined section, the vertical bar disengages from the inside of the first limit groove and the second limit groove, thereby releasing the vertical limit of the vertical bar on one end of the limit bar, ensuring that the limit bar can continue to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a first structural schematic diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0023] Figure 3 For the present invention Figure 1 A schematic diagram of the structure at B in FIG.

[0024] Figure 4 It is a second structural schematic diagram of the present invention;

[0025] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at position C in FIG.

[0026] Figure 6 It is a schematic diagram of the matching structure of the limiting strip, the limiting ring and the arc-shaped matching strip of the present invention;

[0027] Figure 7 For the present invention Figure 6 A schematic diagram of the structure at D in FIG.

[0028] Figure 8 It is a schematic diagram of the matching structure of the limit ring, the strip frame and the arc-shaped matching strip of the present invention;

[0029] Fig. 9 For the present invention Figure 8 A schematic diagram of the structure at position E in FIG.

[0030] Fig.10 It is a schematic diagram of the matching structure of the limit strip and the transparent display board of the present invention;

[0031] Fig.11 For the present invention Fig.10 A magnified schematic diagram of the structure at F in FIG.

[0032] Fig.12 For the present invention Fig.10 A schematic diagram of the structure at G in FIG.

[0033] Fig.13 It is a schematic diagram of the limit ring structure in the present invention.

[0034] In the figure: 1, support frame; 2, display frame; 3, projector; 4, projection screen; 5, connecting roller; 6, limit strip; 7, transparent display board; 8, mounting bracket; 9, rotating shaft; 10, strip groove; 11, retaining ring; 12, limit ring; 1201, movable gap; 13, first motor; 14, driving gear; 15, matching gear; 16, strip frame; 1601, fixing plate; 17, arc matching strip; 18, lifting strip; 19, lead screw; 20, connecting Connecting ring; 21. second motor; 22. vertical bar; 23. fixing bar; 24. first limiting pin; 25. first limiting groove; 26. second limiting groove; 27. round pin; 28. guide groove; 2801. vertical section; 2802. inclined section; 29. ​​contact roller; 30. mounting groove; 31. limiting bolt; 32. nut; 33. cleaning frame; 34. wiping cotton strip; 35. guide plate; 36. plug-in strip; 37. second limiting pin; 38. spring. DETAILED DESCRIPTION

[0035] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0036] like Figures 1 to 13The electrocardiogram teaching apparatus shown comprises a support frame 1, a display frame 2 and a projector 3 are fixedly mounted on both ends of the support frame 1, a projection screen 4 is fixedly connected to a side of the display frame 2 close to the projector 3, a connecting roller 5 is arranged below the display frame 2, a plurality of limiting strips 6 are arranged on the surface of the connecting roller 5 along the circumferential direction, a transparent display board 7 is arranged on the side of the limiting strip 6 away from the connecting roller 5, and different types of electrocardiogram patterns are respectively arranged on the plurality of transparent display boards 7, and a positioning mechanism is connected between the limiting strip 6 and the corresponding transparent display board 7;

[0037] A mounting bracket 8 is fixedly connected to the support frame 1, and a connecting roller 5 is located inside the mounting bracket 8. A synchronous rotation mechanism is connected between the connecting roller 5 and the limiting strip 6. A driving and ascending mechanism is connected to the mounting bracket 8. The transparent display board 7 on the top of the connecting roller 5 is driven to rise vertically through the driving and ascending mechanism, and is in contact with the projection screen 4. When working, the prior art usually uses a display board to display and teach the band graph of the electrocardiogram when conducting electrocardiogram teaching. The electrocardiogram graphs of different types of patients have differences in the composition of each wave and band. It is difficult for conventional electrocardiogram teaching instruments to distinguish and compare the differences between the electrocardiogram graphs, thereby affecting the differentiated display between the electrocardiogram graphs and reducing the teaching effect of the electrocardiogram teaching. The technical solution can solve the above problems. The specific working method is as follows: a normal electrocardiogram graph and the electrocardiogram graphs of various common types of patients are displayed through multiple transparent display boards 7. During the electrocardiogram teaching process, the electrocardiogram graph that needs to be learned is projected onto the display frame 2 through the projector 3. The teaching explanation is carried out on the projection screen 4 on the side, and the connecting roller 5 and the plurality of limit bars 6 are synchronously rotated by the action of the synchronous rotation mechanism, so that the transparent display board 7 on the side of the limit bar 6 is rotated, so that the transparent display board 7 that needs to be raised is rotated to the top of the connecting roller 5 and is located below one side of the projection screen 4, and then the transparent display board 7 is moved upward by driving the lifting mechanism, and is in contact and overlapped with one side of the projection screen 4. When the projection screen 4 and the corresponding transparent display board 7 are in contact and fit, the same position of the electrocardiogram graph projected on the projection screen 4 and the electrocardiogram graph on the transparent display board 7 are overlapped, and the different positions of the electrocardiogram graph are projected on the projection screen 4 through the transparent display board 7 through the projection image of the projector 3. Therefore, after the electrocardiogram graphs on the projection screen 4 and the transparent display board 7 are in contact and fit, the same position and the different position of the two electrocardiogram graphs are observed, thereby enhancing the differentiated display between the two electrocardiogram graphs, and improving the teaching effect of electrocardiogram teaching through comparative learning.

[0038] As a further embodiment of the present invention, the synchronous rotation mechanism includes a rotating shaft 9, which is rotatably connected to the inside of the mounting bracket 8, and the connecting roller 5 is fixedly connected to the rotating shaft 9. A plurality of strip grooves 10 are provided on the surface of the connecting roller 5, and one side of the limiting strip 6 is located inside the corresponding strip groove 10. A retaining ring 11 is fixedly connected to one end of the connecting roller 5, and one end of the plurality of limiting strips 6 is in contact with the retaining ring 11. A limiting ring 12 (such as Figure 5 As shown in FIG. 1 ), the limiting ring 12 is fixedly connected to the mounting bracket 8, and the other ends of the plurality of limiting strips 6 are slidably connected to the limiting ring 12 (as shown in FIG. 1 ). Figure 7 and Fig.12 As shown in the figure, a driving rotation mechanism is connected to the rotating shaft 9; when working, the rotating shaft 9 is rotated by the driving rotation mechanism, and the connecting roller 5 is driven to rotate synchronously through the fixed connection between the rotating shaft 9 and the connecting roller 5, and the blocking ring 11 and the limiting ring 12 block and limit the two ends of the limiting strip 6 during the rotation of the connecting roller 5. One side of the limiting strip 6 is located inside the strip groove 10, and drives the limiting strip 6 to rotate synchronously during the rotation of the connecting roller 5, so that the transparent display board 7 rotates synchronously, and the limiting strip 6 is rotationally limited by the sliding limit of the limiting ring 12 and the limiting strip 6 to prevent the limiting strip 6 from escaping from the strip groove 10.

[0039] As a further embodiment of the present invention, the driving rotation mechanism includes a first motor 13, which is fixedly mounted on the mounting bracket 8. The output shaft of the first motor 13 passes through the mounting bracket 8 and extends to the inside of the mounting bracket 8, after which a driving gear 14 is fixedly connected thereto. A matching gear 15 is fixedly connected to the rotating shaft 9, and the driving gear 14 and the matching gear 15 are meshed with each other. During operation, the driving gear 14 is driven to rotate by the output shaft of the first motor 13, and the matching gear 15 is meshed with each other through the meshing action of the driving gear 14 and the matching gear 15, so that the matching gear 15 is rotated in coordination, thereby driving the rotating shaft 9 to rotate in coordination at the rotating connection of the mounting bracket 8, and driving the connecting roller 5 to rotate synchronously, thereby driving the rotation of the limit strip 6 and the transparent display board 7.

[0040] As a further embodiment of the present invention, the driving mechanism comprises a strip frame 16, the strip frame 16 is fixedly connected to the mounting bracket 8, and a movable notch 1201 (such as Fig. 9 As shown in FIG. 1 ), an arc-shaped matching strip 17 is disposed inside the movable notch 1201, and one end of the limit strip 6 located on the top surface of the connecting roller 5 is slidably connected to the arc-shaped matching strip 17 (as shown in FIG. 1 ). Figure 7As shown, the interior of the strip frame 16 is slidably connected with a lifting strip 18, the arc-shaped matching strip 17 is fixedly connected to the lifting strip 18, one side of the strip frame 16 is fixedly connected to two fixing plates 1601, a lead screw 19 is rotatably connected between the two fixing plates 1601, a connecting ring 20 is fixedly connected to the lifting strip 18, and the connecting ring 20 is threadedly connected to the lead screw 19, and a second motor 21 (as shown) is fixedly installed on the fixing plate 1601 located above Figure 8 As shown in the figure, the output shaft of the second motor 21 is fixedly connected to the top of the lead screw 19, and a vertical limiting mechanism is connected to the strip frame 16; when working, when the rotating shaft 9 drives the connecting roller 5 to rotate, one side of the limiting strip 6 is located inside the corresponding strip groove 10 and rotates synchronously with the connecting roller 5, and one end of the limiting strip 6 is rotationally limited by the limiting ring 12. When the limiting strip 6 rotates to the top of the connecting roller 5, one end of the limiting strip 6 moves along the sliding connection of the limiting ring 12 to the active notch 1201, and continues to be limited by the arc-shaped matching strip 17, and then The lead screw 19 is driven to rotate by the output shaft of the second motor 21, and through the threaded connection between the lead screw 19 and the connecting ring 20, the connecting ring 20 drives the lifting bar 18 to move vertically upward along the sliding connection of the strip frame 16, thereby driving the arc-shaped matching bar 17 to move vertically upward, and the limit bar 6 that is rotationally limited on the arc-shaped matching bar 17 moves upward, so that the corresponding transparent display board 7 on the limit bar 6 rises synchronously. When the arc-shaped matching bar 17 drives the corresponding limit bar 6 to rise, the rise of the limit bar 6 is vertically limited by the vertical limiting mechanism.

[0041] As a further embodiment of the present invention, the vertical limiting mechanism includes a vertical bar 22, which is arranged on one side of the strip frame 16 close to the connecting roller 5, and the upper and lower ends of the vertical bar 22 are fixedly connected to the fixing bar 23, and the fixing bar 23 is fixedly connected to two first limiting pins 24, and the first limiting pins 24 are slidably inserted on the strip frame 16, and the arc-shaped matching bar 17 is provided with a first limiting groove 25, and the limiting bar 6 is provided with a second limiting groove 26 (combined with the vertical bar 22) at one end thereof. Fig. 9 and Fig.12), a circular pin 27 is fixedly connected to the lifting bar 18, and a guide groove 28 is provided on the vertical bar 22, the guide groove 28 includes a vertical section 2801 and an inclined section 2802, the inclined section 2802 is located at the bottom of the vertical section 2801, the circular pin 27 is located at the inner bottom of the inclined section 2802, and the circular pin 27 is slidably connected to the inside of the guide groove 28; when working, the lifting bar 18 drives the arc-shaped matching bar 17 to move vertically upward, so that the limit bar 6 rotatably connected to the arc-shaped matching bar 17 moves upward, and the lifting bar 18 drives the circular pin 27 to move upward synchronously, so that the circular pin 27 moves along the inside of the inclined section 2802, and through the guiding effect of the inclined section 2802, the vertical bar 22 moves toward the arc-shaped matching bar 17 and the corresponding limit bar 6, and enters the inside of the first limit groove 25 and the second limit groove 26, and moves along the sliding insertion of the strip frame 16 through the first limit pin 24 on the fixed bar 23, so as to move the vertical bar 22 When the lifting bar 18 moves downward along the sliding connection of the strip frame 16 and returns to the initial position, the arc-shaped matching strip 17 moves back to the movable notch 1201, and the vertical bar 22 is disengaged from the first limiting groove 25 and the second limiting groove 26 under the guidance of the inclined section 2802, thereby releasing the vertical limit of the vertical bar 22 on one end of the limiting bar 6, and ensuring that the limiting bar 6 can continue to rotate.

[0042] As a further embodiment of the present invention, the second limiting groove 26 is internally rotatably connected with two contact rollers 29 (such as Figure 7 As shown); during operation, when the vertical bar 22 enters the second limiting groove 26, one side of the vertical bar 22 comes into contact with the contact roller 29, and in the process of the limiting bar 6 moving upward, the contact roller 29 and the vertical bar 22 roll through the contact friction force, thereby reducing the friction resistance and ensuring the smoothness of the limiting bar 6 when it rises.

[0043] As a further embodiment of the present invention, the positioning mechanism includes a mounting slot 30 (such as Fig.11As shown in the figure, the mounting groove 30 is provided on the side of the limiting strip 6 close to the transparent display board 7, one side of the transparent display board 7 is located inside the mounting groove 30, and two limiting bolts 31 are arranged on the side of the limiting strip 6, one end of the limiting bolt 31 passes through the limiting strip 6 and the transparent display board 7 and is threadedly connected with a nut 32; when working, one side of the transparent display board 7 is positioned inside the mounting groove 30 through the threaded fixation between the limiting bolt 31 and the nut 32, so that the transparent display board 7 is positioned and installed, and the transparent display board 7 inside the mounting groove 30 is replaced by removing the limiting bolt 31 and the nut 32, thereby improving the convenience of replacing the transparent display board 7.

[0044] As a further implementation scheme of the present invention, the transparent display board 7 and the projection screen 4 have the same length, and the transparent display board 7 is made of an acrylic board. When working, the use of an acrylic board as the material of the transparent display board 7 can effectively reduce the possibility of the transparent display board 7 being broken during use, thereby improving the safety of electrocardiogram teaching.

[0045] As a further embodiment of the present invention, a cleaning frame 33 is provided below the projection screen 4, and the cleaning frame 33 is fixedly connected to the support frame 1 (such as Figure 3 As shown in the figure, wiping cotton strips 34 are fixedly connected to both sides of the interior of the cleaning frame 33; during operation, when the limiting strips 6 and the corresponding transparent display plate 7 rise vertically, the transparent display plate 7 enters the interior of the cleaning frame 33 from the bottom of the cleaning frame 33, and the surface of the transparent display plate 7 is wiped by the wiping cotton strips 34 on both sides of the interior of the cleaning frame 33, thereby improving the cleanliness of the surface of the transparent display plate 7 and facilitating comparative observation of the ECG pattern.

[0046] As a further embodiment of the present invention, guide plates 35 are provided at both ends of the display frame 2 near the projection screen 4, plug strips 36 are fixedly connected at both ends of the display frame 2, two second limit pins 37 are fixedly connected to the guide plates 35, the second limit pins 37 are slidably inserted on the corresponding plug strips 36, and a spring 38 is sleeved on the second limit pin 37, which is fixedly connected between the corresponding plug strips 36 and the end of the second limit pin 37 away from the guide plates 35; when working, when the limit strip 6 and the corresponding transparent display board 7 rise vertically, the transparent display board 7 moves upward from the inclined surface at the bottom of the two guide plates 35, and the movement of the guide plates 35 makes way for the second limit pins 37 to move, so that the springs 38 are compressed and deformed, so that the guide plates 35 are elastically pressed on the transparent display board 7 through the elastic action of the springs 38, so as to prevent the transparent display board 7 and the projection screen 4 from having a gap, thereby improving the fit between the projection screen 4 and the transparent display board 7.

[0047] Working principle of the present invention:

[0048] Normal electrocardiogram patterns and electrocardiogram patterns of various common types of patients are displayed through multiple transparent display boards 7. During the electrocardiogram teaching process, the electrocardiogram patterns that need to be learned are projected onto the projection screen 4 on one side of the display frame 2 by the projector 3 for teaching and explanation, and the connecting roller 5 and the multiple limit bars 6 are rotated synchronously by the action of the synchronous rotation mechanism, so that the transparent display board 7 on the side of the limit bar 6 is rotated, so that the transparent display board 7 that needs to be raised is rotated to the top of the connecting roller 5 and is located below one side of the projection screen 4, and then the transparent display board 7 is moved upward by driving the lifting mechanism, and One side of the projection screen 4 is in contact and overlapped. When the projection screen 4 and the corresponding transparent display board 7 are in contact and fit, the same position of the electrocardiogram graph projected on the projection screen 4 and the electrocardiogram graph on the transparent display board 7 overlaps, and the different positions of the electrocardiogram graph are projected onto the projection screen 4 through the transparent display board 7 via the projection image of the projector 3. Therefore, after the electrocardiogram graphs on the projection screen 4 and the transparent display board 7 are in contact and fit, the same position and the different position of the two electrocardiogram graphs can be observed, thereby enhancing the differentiated display between the two electrocardiogram graphs and improving the teaching effect of electrocardiogram teaching through comparative learning.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An electrocardiogram teaching device, comprising a support frame (1), characterized in that: A display frame (2) and a projector (3) are fixedly mounted on both ends of the support frame (1), a projection screen (4) is fixedly connected to a side of the display frame (2) close to the projector (3), a connecting roller (5) is arranged below the display frame (2), a plurality of limit strips (6) are arranged on the surface of the connecting roller (5) along the circumferential direction, a transparent display board (7) is arranged on a side of the limit strip (6) away from the connecting roller (5), a plurality of the transparent display boards (7) respectively have different types of electrocardiogram patterns, and a positioning mechanism is connected between the limit strip (6) and the corresponding transparent display board (7); The support frame (1) is fixedly connected to a mounting bracket (8), the connecting roller (5) is located inside the mounting bracket (8), a synchronous rotation mechanism is connected between the connecting roller (5) and the limiting strip (6), and a driving lifting mechanism is connected to the mounting bracket (8), and the transparent display board (7) on the top of the connecting roller (5) is driven to rise vertically through the action of the driving lifting mechanism, and is brought into contact with the projection screen (4); The synchronous rotation mechanism comprises a rotating shaft (9), the rotating shaft (9) is rotatably connected to the inside of the mounting bracket (8), the connecting roller (5) is fixedly connected to the rotating shaft (9), a plurality of strip grooves (10) are provided on the surface of the connecting roller (5), one side of the limiting strips (6) are all located inside the corresponding strip grooves (10), one end of the connecting roller (5) is fixedly connected to a retaining ring (11), one end of the plurality of limiting strips (6) are all in contact with the retaining ring (11), the other end of the connecting roller (5) is provided with a retaining ring (12), the retaining ring (12) is fixedly connected to the mounting bracket (8), the other ends of the plurality of limiting strips (6) are all slidably connected to the retaining ring (12), and the rotating shaft (9) is connected to a driving rotation mechanism; The driving rotation mechanism comprises a first motor (13), the first motor (13) being fixedly mounted on the mounting bracket (8), the output shaft of the first motor (13) passing through the mounting bracket (8) and extending to the inside of the mounting bracket (8) and then being fixedly connected to a driving gear (14), the rotating shaft (9) being fixedly connected to a matching gear (15), the driving gear (14) and the matching gear (15) being meshed with each other; The driving lifting mechanism comprises a strip frame (16), the strip frame (16) being fixedly connected to the mounting bracket (8), a movable notch (1201) being provided at the top of the limiting ring (12), an arc-shaped matching strip (17) being provided inside the movable notch (1201), one end of the limiting strip (6) located on the top surface of the connecting roller (5) being slidably connected to the arc-shaped matching strip (17), a lifting strip (18) being slidably connected inside the strip frame (16), and the arc-shaped matching strip (17) being fixedly connected to the lifting strip (18) ), one side of the strip frame (16) is fixedly connected to two fixing plates (1601), a lead screw (19) is rotatably connected between the two fixing plates (1601), a connecting ring (20) is fixedly connected to the lifting strip (18), the connecting ring (20) is threadedly connected to the lead screw (19), a second motor (21) is fixedly mounted on the fixing plate (1601) located above, an output shaft of the second motor (21) is fixedly connected to the top of the lead screw (19), and a vertical limiting mechanism is connected to the strip frame (16); The vertical limiting mechanism comprises a vertical bar (22), the vertical bar (22) being arranged on a side of the bar frame (16) close to the connecting roller (5), the upper and lower ends of the vertical bar (22) being fixedly connected to fixing bars (23), the fixing bars (23) being fixedly connected to two first limiting pins (24), the first limiting pins (24) being slidably inserted on the bar frame (16), the arc-shaped matching bar (17) being provided with a first limiting groove (25), the limiting bar (6) being close to the vertical bar (16), and the first limiting groove (25) being provided on the arc-shaped matching bar (17). A second limiting groove (26) is provided at one end of the straight bar (22); a circular pin (27) is fixedly connected to the lifting bar (18); a guide groove (28) is provided on the vertical bar (22); the guide groove (28) comprises a vertical section (2801) and an inclined section (2802); the inclined section (2802) is located at the bottom of the vertical section (2801); the circular pin (27) is located at the inner bottom of the inclined section (2802); and the circular pin (27) is slidably connected inside the guide groove (28).

2. The electrocardiogram teaching device according to claim 1, characterized in that: Two contact rollers (29) are rotatably connected inside the second limiting groove (26).

3. The electrocardiogram teaching device according to claim 1, characterized in that: The positioning mechanism comprises a mounting groove (30), the mounting groove (30) being formed on a side of the limiting strip (6) close to the transparent display plate (7), one side of the transparent display plate (7) being located inside the mounting groove (30), two limiting bolts (31) being arranged on the side of the limiting strip (6), one end of the limiting bolt (31) passing through the limiting strip (6) and the transparent display plate (7) and then being threadedly connected to a nut (32).

4. The electrocardiogram teaching device according to claim 3, characterized in that: The transparent display board (7) and the projection screen (4) have the same length, and the transparent display board (7) is made of an acrylic board.

5. The electrocardiogram teaching device according to claim 1, characterized in that: A cleaning frame (33) is provided below the projection screen (4), the cleaning frame (33) being fixedly connected to the support frame (1), and wiping cotton strips (34) are fixedly connected to both sides of the cleaning frame (33).

6. The electrocardiogram teaching device according to claim 1, characterized in that: Guide plates (35) are provided at both ends of the display frame (2) on a side close to the projection screen (4), plug strips (36) are fixedly connected to both ends of the display frame (2), two second limit pins (37) are fixedly connected to the guide plates (35), the second limit pins (37) are slidably inserted on the corresponding plug strips (36), a spring (38) is sleeved on the second limit pins (37), and the spring (38) is fixedly connected between the corresponding plug strips (36) and one end of the second limit pin (37) away from the guide plates (35).

Images