Gastric cancer implantation metastasis demonstration model

Abstract

The invention relates to the technical field of medical education demonstration models, in particular to a gastric cancer implantation metastasis demonstration model which comprises a base, a demonstration board arranged above the base and used for fixing and supporting the gastric cancer implantation metastasis demonstration model. The demonstration mechanism is arranged on the outer side of the demonstration board and used for demonstrating the gastric cancer implantation metastasis process, the demonstration mechanism comprises an abdominal cavity model, a pelvic cavity model is arranged below the abdominal cavity model, and a stomach model is arranged above the abdominal cavity model. In the gastric cancer implantation metastasis teaching process, the gastric cancer lesion can dynamically demonstrate that the gastric cancer lesion falls off after breaking through the serosa layer through invasive growth from cancer cells and freely floats under the action of intestinal tracts in the abdominal cavity and abdominal cavity liquid, and the gastric cancer implantation metastasis teaching effect is improved through dynamic demonstration of the gastric cancer implantation metastasis process. And students can conveniently understand the characteristics of the implantation metastasis of the gastric cancer through the demonstration model.

Description

Technical Field

[0001] The present invention relates to the technical field of medical education demonstration models, and particularly to a demonstration model for gastric cancer implantation metastasis. Background Art

[0002] Gastric cancer is a malignant tumor that occurs in the gastric mucosa epithelium, and the common type is adenocarcinoma. Gastric cancer can occur in any part of the stomach, and more than half of it occurs in the gastric antrum. The greater curvature, lesser curvature, anterior and posterior walls of the stomach can all be involved; the vast majority of gastric cancers are adenocarcinomas. There are no obvious symptoms in the early stage, or non-specific symptoms such as upper abdominal discomfort and belching may appear, which are often similar to the symptoms of chronic gastric diseases such as gastritis and gastric ulcer, and are easily overlooked. As gastric cancer develops without intervention, there may be a phenomenon of lesion metastasis in the later stage. The process of cancer cells spreading from the primary site to other organs or tissues. Gastric cancer implantation metastasis is one of the common metastasis methods of gastric cancer.

[0003] In the process of medical education, in order to teach the implantation metastasis of gastric cancer and facilitate students' understanding, a demonstration model of gastric cancer is usually used. As shown in the patent application document with the publication number CN102750861A, it demonstrates the process of gastric cancer lesions falling off from the stomach and entering other organs of the body along the set channels.

[0004] However, in the prior art, the demonstration of gastric cancer implantation metastasis usually only shows its metastasis process simply, and cannot dynamically simulate the movement state of gastric cancer lesions in the human body after falling off, as well as the influence of human organ functions on the metastasis of the fallen lesions. This limitation makes it difficult for students to comprehensively and deeply understand the complex characteristics and dynamic mechanisms of gastric cancer implantation metastasis. Therefore, developing a demonstration model that can dynamically simulate the whole process of gastric cancer implantation metastasis has important practical significance and application value. Summary of the Invention

[0005] In view of the above-mentioned drawbacks of the prior art, the present invention provides a demonstration model for gastric cancer implantation metastasis, which can effectively solve the problems raised in the background art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: The present invention provides a demonstration model for gastric cancer implantation metastasis, including: A base, above which a demonstration board is provided for the fixed support of the demonstration model of gastric cancer implantation metastasis; Demonstration mechanism, which is arranged outside the demonstration board and is used for demonstrating the process of gastric cancer implantation metastasis. The demonstration mechanism includes an abdominal cavity model, a pelvic cavity model is arranged below the abdominal cavity model, a gastric model is arranged above the abdominal cavity model, an intestinal model is arranged inside the abdominal cavity model, electromagnetic blocks are arranged irregularly on the intestinal model, abdominal cavity model and pelvic cavity model, and a lesion shedding component is arranged at the bottom of the gastric model; Simulation mechanism, which is arranged at the rear side of the demonstration board and is used for simulating intestinal peristalsis in the abdominal cavity and cooperating with the demonstration mechanism to demonstrate the process of gastric cancer implantation metastasis. The simulation mechanism includes an electric telescopic rod, the electric telescopic rod is fixedly connected to the rear side of the demonstration board, the telescopic end of the electric telescopic rod is fixedly connected with a mounting plate, a stepping motor is fixedly connected to one side of the mounting plate close to the demonstration board, and the stepping motor is fixedly connected with a rotating bar through an output shaft; Transport mechanism, which is arranged at the front side of the demonstration board and is used for re-transporting the demonstration materials after the demonstration to the gastric model. The transport mechanism includes a transport pipe, a spiral blade is arranged inside the transport pipe, and through holes are arranged on the outer side of the spiral blade.

[0007] Further, the lesion shedding component includes an electromagnetic plate, the electromagnetic plate is fixedly connected to the bottom of the gastric model, a densely distributed lesion model is magnetically connected to the bottom of the electromagnetic plate, and iron sheets are arranged at equal intervals on the outer side of the lesion model.

[0008] Further, the lesion shedding component further includes a cover body, the cover body is fixedly connected to the bottom of the gastric model, an arc-shaped slope is arranged at the inner bottom of the cover body, the bottom of the cover body is fixedly connected with a shedding connecting pipe communicated with the inside of the cover body, and the other end of the shedding connecting pipe is communicated with the inside of the abdominal cavity model.

[0009] Further, the top of the pelvic cavity model is fixedly connected to the bottom of the abdominal cavity model, a connecting groove extending into the inside of the pelvic cavity model is opened at the inner bottom of the abdominal cavity model, and a shedding inlet is opened at the top of the abdominal cavity model.

[0010] Further, the simulation mechanism further includes a rectangular rod, the rectangular rod is fixedly connected to the rear side of the demonstration board, a through rectangular hole is opened at the rear side of the mounting plate, the rear end of the rectangular rod passes through and is slidably connected to the inner side of the rectangular hole, and a stop block is fixedly connected to the rear end of the rectangular rod.

[0011] Further, a through groove is opened at the front side of the demonstration board, the rear side of the abdominal cavity model passes through the through groove and is fixedly connected to the inner wall of the through groove.

[0012] Further, the front side of the rotating bar is provided with concavities and convexities, and the rear side of the abdominal cavity model is provided with an airbag shape, which is used to press the rear side of the abdominal cavity model when the rotating bar rotates, simulating the peristalsis of the intestinal model in the abdominal cavity.

[0013] Further, the conveying mechanism further includes a driving motor, the driving motor is fixedly connected to the top of the conveying pipe, the driving motor is provided with an output shaft, the driving motor is fixedly connected to a transmission rod through the output shaft, the bottom end of the transmission rod penetrates through the top of the conveying pipe, and is movably connected to the inner side of the conveying pipe through a bearing, and the spiral blade is fixedly connected to the outer side of the transmission rod.

[0014] Further, the bottom of the pelvic cavity model is fixedly connected with a feed pipe communicating with the inside of the pelvic cavity model, and the other end of the feed pipe penetrates through the outer side of the conveying pipe and communicates with the inside of the conveying pipe.

[0015] Further, a recovery groove is opened on one side of the cover body close to the conveying pipe, a discharge pipe is fixedly connected to the inner side of the recovery groove, and the other end of the discharge pipe penetrates through the outer side of the conveying pipe and is connected to the inside of the conveying pipe.

[0016] The technical solution provided by the present invention has the following beneficial effects compared with the known prior art: 1. Through the setting of the demonstration mechanism, during the teaching process of gastric cancer implantation metastasis, it can dynamically demonstrate that the gastric cancer lesion breaks through the serosa layer after invasive growth of cancer cells and then falls off, enters the abdominal cavity, floats freely under the action of the intestines and abdominal fluid in the abdominal cavity, and finally enters the pelvic cavity at the lower part of the abdominal cavity under the action of gravity, or adheres to the internal organs in the abdominal cavity. By dynamically demonstrating the process of gastric cancer implantation metastasis, it is convenient for students to understand the characteristics of gastric cancer implantation metastasis through the demonstration model.

[0017] 2. Through the setting of the simulation mechanism, during the demonstration process of gastric cancer implantation metastasis by the demonstration mechanism, by pressing the outer wall of the abdominal cavity, the intestinal peristalsis in the human body is simulated by using the intestinal model, and the abdominal fluid in the abdominal cavity is driven to flow by the peristalsis of the intestines, so as to simulate the influence of the work of human organs on the metastasis of gastric cancer exfoliated lesions, so that it is convenient for students to more intuitively see the implantation metastasis of gastric cancer through the demonstration model, and the demonstration effect is more vivid and vivid.

[0018] 3. Through the setting of the conveying mechanism, after the demonstration of the process of gastric cancer implantation metastasis, the spiral blade can re-convey the lesion model after the demonstration to the lower part of the gastric model, and adsorb the lesion model under the action of the electromagnetic plate arranged at the bottom of the gastric model, which is convenient for the next demonstration teaching of gastric cancer implantation metastasis, so that the demonstration model can be used repeatedly, and has good practicability. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of the overall front structure of the demonstration model of the present invention; Figure 2 Schematic diagram of the overall back structure of the demonstration model of the present invention; Figure 3 Schematic diagram of the partial structure of the simulation mechanism of the present invention; Figure 4 Schematic diagram of the structure at the abdominal cavity model of the present invention; Figure 5 Schematic diagram of the structure at the stomach model of the present invention; Figure 6 Schematic diagram of the partial sectional structure at the cover body of the present invention; Figure 7 Schematic diagram of the structure at the lesion model of the present invention; Figure 8 Schematic diagram of the partial sectional structure at the delivery pipe of the present invention.

[0021] The reference numerals in the figure respectively represent: 1. Base; 2. Demonstration board; 3. Delivery mechanism; 301. Delivery pipe; 302. Feed pipe; 303. Recovery tank; 304. Driving motor; 305. Discharge pipe; 306. Transmission rod; 307. Through hole; 308. Spiral blade; 4. Simulation mechanism; 401. Electric telescopic rod; 402. Rotating bar; 403. Rectangular rod; 404. Mounting plate; 405. Stepper motor; 406. Rectangular hole; 407. Block; 408. Through groove; 5. Demonstration mechanism; 501. Abdominal cavity model; 502. Shedding inlet; 503. Intestinal model; 504. Electromagnet; 505. Connection groove; 506. Pelvic cavity model; 507. Stomach model; 508. Cover body; 509. Shedding connecting pipe; 510. Arc slope; 511. Lesion model; 512. Electromagnetic plate; 513. Iron sheet. Detailed implementation manners

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] The present invention will be further described below in conjunction with embodiments. Embodiment 1

[0024] Refer to Figures 1-7 , which is the first embodiment of the present invention, discloses a demonstration model for gastric cancer implantation metastasis, including: A base 1, above which a demonstration board 2 is provided for fixed support of the gastric cancer implantation metastasis demonstration model; A support rod is fixedly connected to the top of the base 1, and the support rod is fixedly connected to the bottom of the demonstration board 2 to support the demonstration board 2.

[0025] A demonstration mechanism 5 is provided outside the demonstration board 2 for demonstrating the process of gastric cancer implantation metastasis. The demonstration mechanism 5 includes an abdominal cavity model 501, below which a pelvic cavity model 506 is provided. Liquids are provided inside both the abdominal cavity model 501 and the pelvic cavity to simulate the abdominal cavity fluid and pelvic cavity fluid in the human body, facilitating the demonstration of the metastasis process of the lesion model 511. Above the abdominal cavity model 501, a gastric model 507 is provided. An intestinal model 503 is provided inside the abdominal cavity model 501. Electromagnetic blocks 504 are arranged irregularly on the intestinal model 503, the abdominal cavity model 501, and the pelvic cavity model 506. A lesion detachment component is provided at the bottom of the gastric model 507.

[0026] A switch for controlling the electromagnetic block 504 is provided at the demonstration model for controlling the power-on of the electromagnetic block 504. The control switch of the electromagnetic block 504 belongs to the prior art and will not be elaborated in detail here.

[0027] Specifically, the lesion detachment component includes an electromagnetic plate 512, which is fixedly connected to the bottom of the gastric model 507. A densely distributed lesion model 511 is magnetically connected to the bottom of the electromagnetic plate 512. Iron sheets 513 are arranged at equal intervals on the outside of the lesion model 511. Under the action of the iron sheets 513, it is convenient for the electromagnetic plate 512 to adsorb the lesion model 511 when the electromagnetic plate 512 is powered on. When the electromagnetic plate 512 is not powered on, the lesion model 511 loses the suction force from the electromagnetic plate 512, simulating the detachment of gastric cancer lesions.

[0028] The overall appearance of the lesion model 511 is set in bright colors for more clearly observing its metastasis and implantation process during the demonstration.

[0029] A switch for controlling the energization of the electromagnetic plate 512 is provided at the electromagnetic plate 512 to control the energization of the electromagnetic plate 512. The control switch of the electromagnetic block 504 belongs to the prior art and will not be elaborated in detail here.

[0030] Specifically, the lesion detachment assembly further includes a cover body 508. The cover body 508 is fixedly connected to the bottom of the gastric model 507. An arc-shaped slope 510 is provided at the inner bottom of the cover body 508. The bottom of the cover body 508 is fixedly connected with a detachment connecting pipe 509 communicating with the inside of the cover body 508. The other end of the detachment connecting pipe 509 communicates with the inside of the abdominal cavity model 501.

[0031] The arc-shaped slope 510 facilitates the lesion model 511 to smoothly enter the detachment connecting pipe 509 after detaching from the gastric model 507, and finally enter the abdominal cavity model 501 through the detachment connecting pipe 509, demonstrating the detachment of the lesion during the process of gastric cancer implantation metastasis. And after the conveying mechanism 3 conveys the demonstrated lesion model 511 into the cover body 508, it rolls under the electromagnetic plate 512, and the energized electromagnetic plate 512 can adsorb the lesion model 511, which is convenient for the next demonstration.

[0032] Specifically, the top of the pelvic model 506 is fixedly connected to the bottom of the abdominal cavity model 501. A connecting groove 505 extending into the inside of the pelvic model 506 is opened at the inner bottom of the abdominal cavity model 501. A detachment inlet 502 is opened at the top of the abdominal cavity model 501.

[0033] During the demonstration process, it is convenient to demonstrate that after the gastric cancer lesion model 511 detaches, it moves downward under the action of gravity, enters the pelvic cavity through the abdominal cavity, and finally implants in the organs inside the pelvic cavity, which is convenient for the intuitive understanding of the trainees. Embodiment 2

[0034] Refer to Figures 1-7 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is: The simulation mechanism 4 is arranged at the rear side of the demonstration board 2 and is used to simulate the intestinal peristalsis in the abdominal cavity, cooperate with the demonstration mechanism 5 to demonstrate the process of gastric cancer implantation metastasis. The simulation mechanism 4 includes an electric telescopic rod 401. The electric telescopic rod 401 is fixedly connected to the rear side of the demonstration board 2 and is used to adjust the position of the stepping motor 405, so as to adjust the intensity of massaging the abdominal cavity, simulate the influence of intestinal peristalsis at different speeds on the metastasis of gastric cancer lesions. The telescopic end of the electric telescopic rod 401 is fixedly connected with a mounting plate 404 for fixing the stepping motor 405. A stepping motor 405 is fixedly connected to the side of the mounting plate 404 close to the demonstration board 2. The stepping motor 405 is fixedly connected with a rotating bar 402 through an output shaft. The stepping motor 405 can drive the rotating bar 402 to rotate through the output shaft. The clockwise rotation of the rotating bar 402 presses the abdominal cavity model 501, and cooperates with the abdominal cavity fluid to simulate intestinal peristalsis.

[0035] Specifically, the simulation mechanism 4 further includes a rectangular rod 403. The rectangular rod 403 is fixedly connected to the rear side of the demonstration board 2. A through rectangular hole 406 is opened on the rear side of the mounting plate 404. The rear end of the rectangular rod 403 penetrates through the rectangular hole 406 and is slidably connected to the inner side of the rectangular hole 406. Under the action of the rectangular hole 406, the mounting plate 404 can slide on the rectangular rod 403, and under the action of the rectangular hole 406 and the rectangular rod 403, the moving track of the mounting plate 404 can be limited so that it cannot rotate, which is used to make the operation of the stepping motor 405 stable. A stop block 407 is fixedly connected to the rear end of the rectangular rod 403. Under the action of the stop block 407, the moving range of the mounting plate 404 is limited.

[0036] Specifically, a through groove 408 is opened on the front side of the demonstration board 2. The rear side of the abdominal cavity model 501 penetrates through the groove 408 and is fixedly connected to the inner wall of the groove 408. The rear side of the abdominal cavity model 501 extends outside the demonstration board 2. The front side of the rotating bar 402 is arranged in a concave-convex shape. The rear side of the abdominal cavity model 501 is arranged in a balloon shape, which is used to press the rear side of the abdominal cavity model 501 when the rotating bar 402 rotates, simulating the peristalsis of the intestinal model 503 in the abdominal cavity.

[0037] The rotating bar 402 with an uneven surface rotates and presses the abdominal cavity model 501 clockwise from the rear side, simulating the pressing of the palm on the abdomen, making the intestinal model 503 in the abdominal cavity model 501 peristalsis. Through the peristalsis of the intestinal model 503, not only can the position of the electromagnetic block 504 on the intestinal model 503 be changed, demonstrating the randomness of the adsorption of the lesion model 511 on the intestinal model 503, but also the randomness of gastric cancer implantation metastasis and implantation can be more intuitively shown.

[0038] The remaining structures are the same as those in Embodiment 1. Embodiment 3

[0039] Refer toFigures 1-8 , which is the third embodiment of the present invention. The difference between this embodiment and the first and second embodiments is as follows: The conveying mechanism 3 is arranged on the front side of the demonstration board 2 and is used to convey the demonstration materials that have completed the demonstration back to the stomach model 507. The conveying mechanism 3 includes a conveying pipe 301. A spiral blade 308 is arranged inside the conveying pipe 301. Through holes 307 are formed on the outer side of the spiral blade 308. The outer side of the spiral blade 308 is in fit with the inner wall of the conveying pipe 301 to prevent the lesion model 511 being conveyed from being worn or jammed.

[0040] The above-mentioned demonstration materials are the lesion models 511.

[0041] The spiral blade 308 is made of non-magnetic materials such as plastics to avoid the adsorption of the lesion model 511 and facilitate the transportation of the lesion model 511.

[0042] The through holes 307 are arranged on the outer side of the spiral blade 308, which facilitates the separation of the liquid in the model from the lesion model 511 when it rotates. After separation, the lesion model 511 rolls under the electromagnetic plate 512, which facilitates the magnetic adsorption of the electromagnetic plate 512 on it.

[0043] Specifically, the conveying mechanism 3 further includes a driving motor 304. The driving motor 304 is fixedly connected to the top of the conveying pipe 301. The driving motor 304 is equipped with an output shaft. The driving motor 304 is fixedly connected to a transmission rod 306 through the output shaft. The bottom end of the transmission rod 306 penetrates through the top of the conveying pipe 301 and is movably connected to the inside of the conveying pipe 301 through a bearing. The spiral blade 308 is fixedly connected to the outer side of the transmission rod 306.

[0044] The driving motor 304 provides power for the operation of the conveying mechanism 3 to ensure that when the lesion model 511 needs to be conveyed, the spiral blade 308 can rotate stably and continuously. Under the action of the transmission rod 306, it can be used for the connection between the spiral blade 308 and the driving motor 304, so that the driving motor 304 can drive the spiral blade 308 to rotate through the transmission rod 306.

[0045] Specifically, a feed pipe 302 communicating with the inside of the pelvic model 506 is fixedly connected to the bottom of the pelvic model 506. The other end of the feed pipe 302 penetrates through the outer side of the conveying pipe 301 and is communicated with the inside of the conveying pipe 301. A recovery groove 303 is formed on one side of the cover body 508 close to the conveying pipe 301. An outlet pipe 305 is fixedly connected to the inside of the recovery groove 303. The other end of the outlet pipe 305 penetrates through the outer side of the conveying pipe 301 and is connected to the inside of the conveying pipe 301.

[0046] After the demonstration, the lesion model 511 deposited inside the pelvic cavity under the action of gravity or the lesion model 511 that falls off from the intestinal model 503, abdominal cavity model 501, and pelvic cavity model 506 after the electromagnetic block 504 is powered on, all gather at the bottom of the pelvic cavity, enter the conveying mechanism 3 through the feed pipe 302, and are discharged from the discharge pipe 305 by the rotation of the spiral blade 308, and then enter below the stomach model 507 again and are adsorbed by the electromagnetic plate 512.

[0047] The remaining structures are the same as those in Embodiment 1 and Embodiment 2.

[0048] The working process of the present invention is as follows: When conducting the teaching demonstration of gastric cancer implantation metastasis, move the demonstration model to the teaching site and complete the relevant preparatory work before teaching; Turn off the power supply of the electromagnetic plate 512. After the electromagnetic plate 512 loses its suction force, the lesion model 511 falls off from the outer wall of the stomach model 507 and rolls downward through the arc slope 510 in the cover body 508, and enters the interior of the abdominal cavity model 501 under the action of the falling connecting pipe 509; After the lesion model 511 enters the abdominal cavity model 501, it floats freely under the action of the abdominal cavity fluid and moves downward under the action of gravity. If it rolls to the electromagnetic block 504 arranged on the inner wall of the abdominal cavity model 501 or the outer side of the intestinal model 503, part of the lesion model 511 is adsorbed under the action of the electromagnetic block 504. The lesion model 511 that fails to be adsorbed continues to move downward under the action of gravity and finally enters the pelvic cavity model 506 through the connecting groove 505 to conduct a dynamic demonstration of the implantation metastasis and implantation of gastric cancer without the influence of organ work; When demonstrating again, the stepping motor 405 can be started. The stepping motor 405 drives the rotating bar 402 to rotate through the output shaft. The rotating bar 402 rotates to press the abdominal cavity model 501 from the rear. By pressing the back of the abdominal cavity model 501, the intestinal model 503 in the abdominal cavity model 501 can be made to peristalsis. Watch the metastasis and implantation of the fallen lesion model 511 under intestinal peristalsis. The position of the rotating bar 402 can be adjusted through the electric telescopic rod 401, so as to adjust the peristalsis speed of the intestinal model 503 and conduct a dynamic demonstration of the implantation metastasis and implantation of gastric cancer under the influence of organ work; After the demonstration, the power supply to the electromagnetic block 504 is turned off, the power supply to the electromagnetic plate 512 is turned on, and at the same time, the drive motor 304 is turned on. The lesion model 511 that has lost the suction force of the electromagnetic block 504 falls off from the intestinal model 503, the inner wall of the abdominal cavity, and the inner wall of the pelvic cavity under the action of gravity, enters the feed pipe 302, and enters the delivery pipe 301 through the feed pipe 302. The drive motor 304 drives the spiral blade 308 to rotate through the transmission rod 306, conveys the lesion model 511 in the delivery pipe 301 until it is discharged through the discharge pipe 305, rolls under the electromagnetic plate 512 under the action of the arc slope 510, and is adsorbed by the electromagnetic plate 512 for the lesion model 511 after the demonstration is completed, facilitating the next teaching demonstration.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gastric cancer implantation metastasis demonstration model, characterized in that: include: A base (1), wherein a demonstration board (2) is arranged above the base (1) and is used for fixing and supporting a gastric cancer implantation metastasis demonstration model; A demonstration mechanism (5), the demonstration mechanism (5) being arranged outside the demonstration board (2) and used for demonstrating the process of gastric cancer implantation metastasis, the demonstration mechanism (5) comprising an abdominal cavity model (501), a pelvic cavity model (506) being arranged below the abdominal cavity model (501), a stomach model (507) being arranged above the abdominal cavity model (501), an intestinal model (503) being arranged inside the abdominal cavity model (501), electromagnetic blocks (504) being arranged irregularly on the intestinal model (503), the abdominal cavity model (501) and the pelvic cavity model (506), and a lesion shedding component being arranged at the bottom of the stomach model (507); A simulation mechanism (4), the simulation mechanism (4) being arranged at the rear side of the demonstration board (2) and being used to simulate intestinal peristalsis in the abdominal cavity and cooperate with the demonstration mechanism (5) to demonstrate the process of gastric cancer implantation metastasis, the simulation mechanism (4) comprising an electric telescopic rod (401), the electric telescopic rod (401) being fixedly connected to the rear side of the demonstration board (2), the telescopic end of the electric telescopic rod (401) being fixedly connected to a mounting plate (404), the mounting plate (404) being fixedly connected to a side close to the demonstration board (2) with a stepping motor (405), the stepping motor (405) being fixedly connected to a rotating bar (402) via an output shaft; A conveying mechanism (3) is arranged on the front side of the demonstration board (2) and is used to convey the demonstration material after the demonstration is completed to the stomach model (507). The conveying mechanism (3) comprises a conveying tube (301). A spiral blade (308) is arranged on the inner side of the conveying tube (301). A through hole (307) is opened on the outer side of the spiral blade (308).

2. The gastric cancer implantation metastasis demonstration model according to claim 1, characterized in that: The lesion shedding component comprises an electromagnetic plate (512), wherein the electromagnetic plate (512) is fixedly connected to the bottom of the stomach model (507), the bottom of the electromagnetic plate (512) is magnetically connected to densely distributed lesion models (511), and iron sheets (513) distributed at equal intervals are arranged outside the lesion models (511).

3. The gastric cancer implantation metastasis demonstration model according to claim 1, characterized in that: The lesion shedding component further comprises a cover body (508), wherein the cover body (508) is fixedly connected to the bottom of the stomach model (507), an arc-shaped slope (510) is arranged at the inner bottom of the cover body (508), and a shedding connection tube (509) communicating with the inside of the cover body (508) is fixedly connected to the bottom of the cover body (508), and the other end of the shedding connection tube (509) is communicated with the inside of the abdominal cavity model (501).

4. The gastric cancer implantation metastasis demonstration model according to claim 1, characterized in that: The top of the pelvic cavity model (506) is fixedly connected to the bottom of the abdominal cavity model (501); the bottom of the abdominal cavity model (501) is provided with a connecting groove (505) extending into the interior of the pelvic cavity model (506); and the top of the abdominal cavity model (501) is provided with a fall-off entrance (502).

5. The gastric cancer implantation metastasis demonstration model according to claim 1, characterized in that: The simulation mechanism (4) further comprises a rectangular rod (403), wherein the rectangular rod (403) is fixedly connected to the rear side of the demonstration board (2), a rectangular hole (406) is provided on the rear side of the mounting plate (404), a rear end of the rectangular rod (403) passes through the rectangular hole (406) and is slidably connected to the inner side of the rectangular hole (406), and a stopper (407) is fixedly connected to the rear end of the rectangular rod (403).

6. The gastric cancer implantation metastasis demonstration model according to claim 1, characterized in that: The demonstration board (2) has a through slot (408) on the front side, and the abdominal cavity model (501) has a rear side that passes through the through slot (408) and is fixedly connected to the inner wall of the through slot (408).

7. The gastric cancer implantation metastasis demonstration model according to claim 1, characterized in that: The front side of the rotating bar (402) is arranged in a concave-convex shape, and the rear side of the abdominal cavity model (501) is arranged in an air bag shape, so as to press the rear side of the abdominal cavity model (501) when the rotating bar (402) rotates, thereby simulating the peristalsis of the intestinal model (503) in the abdominal cavity.

8. The gastric cancer implantation metastasis demonstration model according to claim 1, characterized in that: The conveying mechanism (3) further comprises a driving motor (304), the driving motor (304) being fixedly connected to the top of the conveying pipe (301), the driving motor (304) being provided with an output shaft, the driving motor (304) being fixedly connected to a transmission rod (306) via the output shaft, the bottom end of the transmission rod (306) passing through the top of the conveying pipe (301) and being movably connected to the inner side of the conveying pipe (301) via a bearing, and the spiral blade (308) being fixedly connected to the outer side of the transmission rod (306).

9. The gastric cancer implantation metastasis demonstration model according to claim 1, characterized in that: A feeding pipe (302) communicating with the interior of the pelvic cavity model (506) is fixedly connected to the bottom of the pelvic cavity model (506); the other end of the feeding pipe (302) passes through the outside of the delivery pipe (301) and communicates with the interior of the delivery pipe (301).

10. The gastric cancer implantation metastasis demonstration model according to claim 3, characterized in that: A recovery groove (303) is provided on one side of the cover body (508) close to the conveying pipe (301), a discharge pipe (305) is fixedly connected to the inside of the recovery groove (303), and the other end of the discharge pipe (305) passes through the outside of the conveying pipe (301) and is connected to the inside of the conveying pipe (301).

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