Simulated organ models

Abstract

To provide means which can replicate complicated motions of such organs as a heart.SOLUTION: A simulated organ model 1 includes an outer shell 2 and a vibration unit 3 for vibrating the outer shell 2. The vibration unit 3 is driven by an AC signal based on vibrations of an organ. The simulated organ model 1 further includes an amplifier 4 to drive the vibration unit 3 by an AC signal based on vibrations of an organ. The vibration unit 3 includes: a movable unit including a voice coil 3b; and a driving unit including a magnetic circuit 3a and driving the movable unit. The movable unit and the driving unit of the vibration unit 3 are fixed to the inner side of the outer shell 2.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD

[0001] The present invention relates to a simulated organ model that imitates an organ.

BACKGROUND ART

[0002] Simulated organ models that imitate organs such as the heart are used, for example, as learning materials for understanding the mechanisms of living organisms, and for surgical operation training. For simulated organ models, methods have been proposed to reproduce the behavior of organs accurately with a simple structure. For example, the invention described in Patent Document 1 uses an eccentric motor to reproduce periodic repetitive motions, and slides the surface of the eccentric motor against a soft organ model formed from an animal organ or an elastic material, thereby attempting to reproduce motions close to those of a real object.

[0003] For example, in the case of a heart model, the rotation control of an eccentric motor can simulate motions to approximate the heartbeat frequency by controlling the drive voltage, but this is ultimately no more than the reproduction of a single periodic pulse. However, when observing the motion of the heart, the actual heartbeat is a waveform with the first heart sound and the second heart sound as one cycle, which is an alternating vibration containing multiple frequencies representing complex motions caused by contraction and expansion respectively. In addition, when there is an abnormality in the heart, noise components are superimposed. When attempting to accurately reproduce these motions for medical learning, it is not possible solely through voltage control of an eccentric motor.

PRIOR ART DOCUMENTS

PATENT DOCUMENTS

[0004]

PATENT DOCUMENT 1

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0005] As described above, the conventional art has a problem that it cannot reproduce the complex motions of organs such as the heart.

[0006] The object of the present invention is to provide a means capable of reproducing the complex movements of organs such as the heart. [Means for solving the problem]

[0007] The simulated organ model of the first invention comprises an outer shell and a vibrator for vibrating the outer shell, wherein the vibrator is driven by an AC signal based on the vibration of the organ.

[0008] In this invention, the vibrator for vibrating the outer shell is driven by an AC signal based on the vibration of an organ. As a result, the vibrator imparts complex movements to the outer shell, making it possible to reproduce the complex movements of organs such as the heart.

[0009] The simulated organ model of the second invention is characterized in that, in the simulated organ model of the first invention, it further comprises an amplifier for driving the vibrator with an AC signal based on the vibration of the organ.

[0010] The simulated organ model of the third invention is characterized in that, in the simulated organ model of the first invention, the outer shell is formed of an elastic material.

[0011] The simulated organ model of the fourth invention is characterized in that, in the simulated organ model of the first invention, the vibrator has a movable part including a voice coil and a drive part including a magnetic circuit that drives the movable part, and the movable part and the drive part of the vibrator are fixed to the inside of the outer shell.

[0012] The simulated organ model of the fifth invention is characterized in that, in the simulated organ model of the fourth invention, the movable part and the drive part of the vibrator unit are exposed to the outside.

[0013] The simulated organ model of the sixth invention is characterized in that, in the simulated organ model of the fourth invention, the outer shell has a first outer shell and a second outer shell which are divided into two parts, one of the movable part and the drive part of the vibrator is fixed to the inside of the first outer shell, and the other of the movable part and the drive part of the vibrator is fixed to the inside of the second outer shell.

[0014] The simulated organ model of the seventh invention is characterized in that, in the simulated organ model of the sixth invention, the outer surface of the first outer shell is modeled after the external shape of one surface of the organ, and the outer surface of the second outer shell is modeled after the external shape of the other surface of the organ.

[0015] The simulated organ model of the eighth invention is characterized in that, in the simulated organ model of the first invention, it further comprises a base on which the model is placed, the outer edge of the outer shell is fixed to the outer edge of the base, the vibrator has a movable part including a voice coil and a drive part including a magnetic circuit that drives the movable part, one of the movable part and the drive part of the vibrator is fixed to the inside of the outer shell, and the other of the movable part and the drive part of the vibrator is fixed to the inside of the base.

[0016] The simulated organ model of the ninth invention is characterized in that, in the simulated organ model of the first invention, it further comprises a base on which the model is placed, the outer shell and the base are separate, the vibrator has a movable part including a voice coil and a drive part including a magnetic circuit that drives the movable part, one of the movable part and the drive part of the vibrator is fixed to the inside of the outer shell, and the other of the movable part and the drive part of the vibrator is fixed to the inside of the base.

[0017] The simulated organ model of the tenth invention is characterized in that, in the simulated organ model of the first invention, the outer shell is modeled after the external shape of a heart, the exciters are plurality, the first exciter of the plurality of exciters is provided at a position corresponding to the position where the apex of the heart of the outer shell is modeled, and the second exciter of the plurality of exciters is provided at a position corresponding to the position where the base of the heart of the outer shell is modeled.

[0018] In this invention, the first of the multiple vibrators is positioned at a location corresponding to the apex of the heart's outer shell, which is simulated. The second of the multiple vibrators is positioned at a location corresponding to the base of the heart's outer shell, which is simulated. Therefore, by activating the vibrators based on vibrations collected at each location (apex and base), it is possible to reproduce behavior that is more in line with reality.

[0019] The 11th invention is characterized in that, in the 10th invention, the third vibrator among the plurality of vibrators is located at a position corresponding to the center of the outer shell which is modeled after the heart.

[0020] In this invention, the third vibrator among the multiple vibrators is positioned in a location corresponding to the center of the outer shell, which is modeled after the heart. The valves are concentrated in the center of the heart. Therefore, by placing the vibrator in this area, it is possible to reproduce behavior that is more in line with reality.

[0021] The simulated organ model of the twelfth invention is characterized in that, in the simulated organ model of the tenth invention, the first vibrator is excited based on vibrations collected at the apex of the heart, and the second vibrator is excited based on vibrations collected at the base of the heart.

[0022] The simulated organ model of the 13th invention is characterized in that, in the simulated organ model of the 10th invention, the first vibrator and the second vibrator are vibrated with a predetermined time difference.

[0023] The simulated organ model according to the fourteenth invention is the simulated organ model according to the tenth invention, characterized in that the first vibrator and the second vibrator are vibrated with the time difference between the first heart sound and the second heart sound.

[0024] The simulated organ model according to the fifteenth invention is the simulated organ model according to the eleventh invention, characterized in that the third vibrator is vibrated based on vibration collected at the center of the heart.

[0025] The simulated organ model according to the sixteenth invention is the simulated organ model according to the first invention, characterized in that the vibrator is provided inside the outer shell.

[0026] The simulated organ model according to the seventeenth invention is the simulated organ model according to the first invention, characterized in that the outer shell imitates the outer shape of an organ.

[0027] The simulated organ model according to the eighteenth invention is the simulated organ model according to the first invention, characterized in that the AC signal based on the vibration of the organ is an AC signal proportional to the vibration of the organ. Effects of the Invention

[0028] According to the present invention, complex movements of organs such as the heart can be reproduced. Brief Description of the Drawings

[0029] [Figure 1] (a) is a plan view showing the simulated organ model according to the first embodiment of the present invention. (b) is a cross-sectional view showing the simulated organ model according to the first embodiment of the present invention. [Figure 2] It is a cross-sectional view showing a vibrator. [Figure 3] This is a diagram in which an amplifier is added to Fig. 1(a). [Figure 4] It is a diagram for explaining the arrangement of a plurality of vibrators. [Figure 5] It is a diagram showing the relationship between the vibrators and the amplifiers in Fig. 4. . [Figure 6]This is a diagram illustrating the arrangement of multiple vibrators. [Figure 7] (a) is a plan view showing a simulated organ model according to a second embodiment of the present invention. (b) is a cross-sectional view showing a simulated organ model according to a second embodiment of the present invention. [Figure 8] (a) is a plan view showing a simulated organ model according to the third embodiment of the present invention. (b) is a cross-sectional view showing a simulated organ model according to the third embodiment of the present invention. [Figure 9] This is a cross-sectional view showing a modified example of the third embodiment, specifically a simulated organ model 301. [Modes for carrying out the invention]

[0030] Embodiments of the present invention will be described below.

[0031] (First Embodiment) Figure 1(a) is a plan view showing a simulated organ model 1 according to the first embodiment of the present invention. Figure 1(b) is a cross-sectional view showing a simulated organ model 1 according to the second embodiment of the present invention. As shown in Figure 1, the simulated organ model 1 comprises an outer shell 2, a vibrator 3, and the like.

[0032] The outer shell 2 has an upper shell 2a (first outer shell) and a lower shell 2b (second outer shell), which are divided into two parts. The outer shell 2 is formed of an elastic material. As the elastic material, for example, a highly flexible material such as a silicone elastomer or a urethane elastomer can be used. The outer shell 2 is modeled after the external shape of an organ. For example, the outer surface of the upper shell 2a is modeled after the external shape of one surface of the organ. Also, the outer surface of the lower shell 2b is modeled after the external shape of the other surface of the organ. In this embodiment, the external shape of the heart is modeled as the organ. If the face side of the human body is considered the front, the outer surface of the upper shell 2a is modeled after the external shape of the front side of the heart. The outer surface of the lower shell 2b is modeled after the external shape of the back side of the heart. In this embodiment, the organ modeled is the heart, but it is not limited to this, and may be, for example, the lungs, small intestine, large intestine, etc. Also, the outer shell 2 does not have to be formed of an elastic material.

[0033] An exciter 3 is provided inside the outer shell 2. Figure 2 is a cross-sectional view showing the exciter 3. The exciter 3 is an electrodynamic exciter equipped with an internal magnetic circuit 3a. The internal magnetic circuit 3a consists of a yoke 3aa, a magnet 3ab, and a plate 3ac. The magnetic circuit 3 has a magnetic air gap in which a voice coil 3b is positioned to convert the input electrical audio signal into vibration. The annular magnetic air gap is defined between the outer circumferential end face of the annular pole 3ac and the concave yoke 3aa, and a strong DC magnetic field is generated by the magnetic force from the magnet 3ab. The direction of vibration of the exciter 3 is the vertical direction in the figure.

[0034] In the vibrator 3 alone, the movable part including the voice coil 3b and the drive part including the magnetic circuit 3a are exposed to the outside. In other words, the movable part and the drive part have an exposed, open structure. The drive part drives the movable part. As shown in Figure 1, the movable part and the drive part of the vibrator 3 are fixed inside the outer shell 2. Specifically, the plate material 3c of the movable part is fixed inside the upper shell 2a. Also, the yoke 3aa of the drive part is fixed inside the lower shell 2b.

[0035] The vibrator 3 is driven by an AC signal based on the vibration of an organ. Specifically, the vibrator 3 is driven by an AC signal proportional to the vibration of the organ. For this reason, as shown in Figure 2, the simulated organ model 1 further includes an amplifier 4 for driving the vibrator 3 with an AC signal proportional to the vibration of the organ. In this embodiment, the amplifier 4 drives the vibrator 3 with an AC signal proportional to the vibration of the heart, which is the organ. The amplifier 4 may be located inside the outer shell 2 or outside the outer shell 2.

[0036] Amplifier 4 drives the vibrator 3 with an AC signal proportional to the vibration (movement) of a pre-recorded heart (organ), or an electrical signal amplified from a real-time AC signal obtained from a sensing device such as a digital stethoscope for the heart (organ). As a result, the upper shell 2a, which is the outer shell on the front side, vibrates faithfully to the AC signal, making it possible to accurately simulate the movement of the heart (organ). Similarly, the lower shell 2b, which is the outer shell on the back side, also vibrates due to the vibration caused by the reaction of the vibrator 3.

[0037] By holding the simulated organ model 1 in the palm of their hand, users can experience the movement of the heart (organ) through vibrations caused by the reaction of the vibrator 3 transmitted to the lower shell 2b, which is the outer shell 2 on the back of the simulated organ model 1. In addition, the movement of the upper shell 2a, which is the outer shell 2 on the front, allows users to visually perceive the movement of the heart (organ), enabling them to gain a deeper understanding of the workings of living organisms than with conventional methods.

[0038] In the first embodiment, the upper shell 2a and lower shell 2b of the outer shell 2 are molded to represent the front and back shapes of a heart (organ), and the simulated organ model 1 moves as the elastic body (outer shell 2) expands and contracts in response to the vibration of the voice coil 3b.

[0039] In this embodiment, multiple vibrators 3 are provided. Figure 4 is a diagram illustrating the arrangement of the multiple vibrators 3. As described above, the outer shell 2 is modeled after the external shape of a heart. One of the multiple vibrators 3 (hereinafter referred to as the "first vibrator") is located at a position corresponding to the position on the outer shell 2 (upper shell 2a) where the apex of the heart is modeled, that is, below the position where the apex is modeled. Another of the multiple vibrators 3 (hereinafter referred to as the "second vibrator") is located at a position corresponding to the position on the outer shell 2 (upper shell 2a) where the base of the heart is modeled, that is, below the position where the base of the heart is modeled. In other words, the two vibrators 3 are arranged in a sequence in a direction that allows changes in myocardial movement to be transmitted sequentially.

[0040] The first vibrator 3, positioned to correspond to the apex of the heart, is excited based on vibrations collected at the apex of the heart. Similarly, the second vibrator 3, positioned to correspond to the base of the heart, is excited based on vibrations collected at the base of the heart. Figure 5 shows the relationship between the vibrators 3 and amplifiers 4 in Figure 4. As shown in Figure 5, the two vibrators 3 are each driven by two amplifiers 4.

[0041] The first exciter 3 and the second exciter 3 are excited with a predetermined time difference. The first exciter 3 is excited at the timing of the first tonic, and the second exciter 3 is excited at the timing of the second tonic. Therefore, the first exciter 3 and the second exciter 3 are excited with a time difference between the first and second tonics. In a normal heart, the first tonic is heard louder at the apex, and the second tonic is heard louder at the base. Therefore, heart sounds are heard in the order from the apex to the base. Accordingly, by arranging the exciters in the order of the first exciter 3 and then the second exciter 3, it is possible to reproduce the operation that is closer to that of an actual heart. For more information on heart sounds, especially the timing of the first and second tonics, please refer to the website of Igaku-Shoin Co., Ltd. (https: / / www.igaku-shoin.co.jp / paper / archive / old / old_article / n2000dir / n2392dir / n2392_11.htm#p01).

[0042] In Figure 4, two vibrators 3 are positioned to correspond to the apex and base of the heart, respectively. In addition, in Figure 6, one of the multiple vibrators 3 (hereinafter referred to as the "third vibrator") is positioned to correspond to the center of the heart modeled on the outer shell 2 (upper shell 2a), that is, below the center of the heart model. The third vibrator 3 is excited based on vibrations collected at the center of the heart.

[0043] The heart's valves are concentrated in the center. The third vibrator 3, positioned to correspond to the area around the valves (the center of the heart), can be made to simulate disease conditions. By using a vibrator with excellent high-frequency characteristics, the reproducibility can be further improved. Note that there may be only one vibrator 3, rather than multiple.

[0044] (Second Embodiment) Figure 7(a) is a plan view showing the simulated organ model 101 according to the second embodiment of the present invention. Figure 7(b) is a cross-sectional view showing the simulated organ model 101 according to the second embodiment of the present invention. The simulated organ model 101 according to the second embodiment differs from the simulated organ model 1 according to the first embodiment in that it includes a base 105. The following description will mainly focus on the differences between the simulated organ model 101 and the simulated organ model 1. Therefore, unless otherwise specified, the simulated organ model 101 has the same configuration as the simulated organ model 1.

[0045] As shown in Figure 7, the simulated organ model 101 comprises an outer shell 102, a vibrator 103, a base 105, etc. The outer shell 102 is composed of a portion corresponding to the upper shell 2a in the first embodiment. The outer surface of the outer shell 102 is modeled after the external shape of one surface of an organ. In this embodiment, the external shape of a heart is modeled as the organ. If the face of the human body is considered the front, the outer surface of the upper shell 102 is modeled after the external shape of the front side of the heart.

[0046] The base 105 is for supporting the simulated organ model 101. Therefore, the bottom surface of the base 105 is flat, and the external shape of the organ is not simulated. The base 104, for example, has a trapezoidal shape in cross-section. The outer edge of the outer shell 102 is fixed to the outer edge of the base 105.

[0047] The vibrator 103 has the same configuration as the vibrator 3. The vibrator 103 is installed inside the outer shell 102 and the base 105. The movable part of the vibrator 103 is fixed to the inside of the outer shell 102. The drive unit of the vibrator 103 is fixed to the inside of the base 105.

[0048] In the second embodiment, the outer shell 102 is molded to resemble the shape of the front side of a heart (organ), and the outer edge of the outer shell 102 is fixed to the base 105 on the back side. The base 105 allows the simulated organ model 101 to be placed stably on a desk. Also, similar to the first embodiment, the simulated organ model 101 moves due to the expansion and contraction of the outer shell 102, which is an elastic body on the front side.

[0049] (Third embodiment) Figure 8(a) is a plan view showing the simulated organ model 201 according to the third embodiment of the present invention. Figure 8(b) is a cross-sectional view showing the simulated organ model 201 according to the third embodiment of the present invention. The simulated organ model 201 according to the third embodiment differs from the simulated organ model 101 according to the second embodiment in the configuration of the outer shell and base. The following description will mainly focus on the differences between the simulated organ model 201 and the simulated organ model 101. Therefore, unless otherwise specified, the simulated organ model 201 has the same configuration as the simulated organ model 101.

[0050] As shown in Figure 8, the simulated organ model 201 comprises an outer shell 202, a vibrator 203, a base 205, etc. The outer shell 202 corresponds to the outer shell 102 in the second embodiment. The outer surface of the outer shell 202 is modeled after the external shape of one surface of the organ. In this embodiment, the external shape of the heart is modeled as the organ. If the face of the human body is considered the front, the outer surface of the upper shell 202 is modeled after the external shape of the front side of the heart.

[0051] The base 205 is for supporting the simulated organ model 201. Therefore, the bottom surface of the base 205 is flat, and the external shape of the organ is not simulated. The base 205 has, for example, a trapezoidal shape in cross-section. In the second embodiment, the outer edge of the outer shell 102 is fixed to the outer edge of the base 105, but in this embodiment, the outer shell 202 and the base 205 are separate. That is, the outer edge of the outer shell 202 is not fixed to the outer edge of the base 205.

[0052] The vibrator 203 has the same configuration as the vibrator 103. The vibrator 203 is installed inside the outer shell 202 and the base 205. The movable part of the vibrator 203 is fixed to the inside of the outer shell 202. The drive unit of the vibrator 203 is fixed to the inside of the base 205.

[0053] In the third embodiment, the outer shell 202 is molded to resemble the front surface of a heart (organ), and the outer shell 202 is separate from the base 205 on the back side, without being connected. The movement of the voice coil of the vibrator 203 is directly reflected in the movement of the simulated organ model 203.

[0054] As described above, in this embodiment, the vibrator 3 for vibrating the outer shell 2 is driven by an AC signal based on the vibration of an organ. As a result, the vibrator 3 imparts complex movements to the outer shell 2, making it possible to reproduce the complex movements of organs such as the heart.

[0055] Furthermore, in this embodiment, the first vibrator 3 among the multiple vibrators 3 is positioned at a location corresponding to the position of the apex of the heart on the outer shell 2. The second vibrator 3 among the multiple vibrators 3 is positioned at a location corresponding to the position of the base of the heart on the outer shell 2. Therefore, by activating the vibrators 3 based on vibrations collected at each part (apex and base), it is possible to reproduce behavior that is more in line with reality.

[0056] Furthermore, in this embodiment, the third vibrator 3 among the multiple vibrators 3 is positioned in a location corresponding to the center of the outer shell 2, which is modeled after the heart. The valves are concentrated in the center of the heart. Therefore, by placing the vibrator 3 in this area, it is possible to reproduce behavior that is more in line with reality.

[0057] Although embodiments of the present invention have been described above, the embodiments to which the present invention can be applied are not limited to those described above, and modifications can be made as appropriate without departing from the spirit of the invention, as illustrated below.

[0058] Figure 9 is a cross-sectional view showing a modified example of the third embodiment of a simulated organ model 301. In the third embodiment described above, as shown in Figure 8(b), the movable part of the vibrator 203 is fixed inside the outer shell 202, and the drive unit is fixed inside the base 205. However, as shown in Figure 9, the drive unit may be fixed inside the outer shell 302 and the movable part may be fixed inside the base 305. In other words, the vibrator 303 may be arranged in the opposite way to Figure 8(b), with the drive unit on top and the movable part on the bottom.

[0059] Similarly, in the first embodiment, the drive unit of the vibrator 3 may be fixed inside the upper shell 2a, and the movable part may be fixed inside the lower shell 2b. In the second embodiment, the drive unit of the vibrator 103 may be fixed inside the outer shell 102, and the movable part may be fixed inside the base 105.

[0060] In electrodynamic vibrators, there is a difference in whether or not the self-weight acts on the heavy magnetic circuit depending on whether it is positioned upward (movable part at the top) or downward (movable part at the bottom), resulting in different resonant frequencies. As shown in the modified example, positioning the movable part at the bottom and lowering the resonant frequency allows for a larger amplitude in the heartbeat signal, resulting in more dynamic movement of the simulated organ model. Therefore, the optimal usage varies depending on the weight of the upper shell and the specifications of the vibrator, and in some cases, a configuration like the modified example may be suitable. [Industrial applicability]

[0061] The present invention can be suitably used in simulated organ models that mimic organs. [Explanation of Symbols]

[0062] 1, 101, 201, 301 Simulated Organ Models 2, 102, 202, 302 outer shell 2a Upper shell (first outer shell) 2b Lower shell (second outer shell) 3, 103, 203, 303 Vibrators 4 Amplifier 105, 205, 305 base

Claims

1. Outer shell and, The system comprises an exciter for vibrating the outer shell, The aforementioned vibrator is The movable part including the voice coil, It includes a magnetic circuit and a drive unit that drives the movable part, A simulated organ model characterized by being driven by an AC signal based on the vibration of the organ.

2. The simulated organ model according to claim 1, further comprising an amplifier for driving the vibrator with an AC signal based on the vibration of the organ.

3. The simulated organ model according to claim 1, characterized in that the outer shell is formed of an elastic material.

4. The simulated organ model according to claim 1, characterized in that the movable part and the drive part of the vibrator are fixed to the inside of the outer shell.

5. The simulated organ model according to claim 1, characterized in that the movable part and the drive part of the vibrator unit are exposed to the outside.

6. The outer shell has a first outer shell and a second outer shell which are divided into two parts. One of the movable part and the drive part of the vibrator is fixed to the inside of the first outer shell. The simulated organ model according to claim 1, characterized in that the other of the movable part and the drive part of the vibrator is fixed to the inside of the second outer shell.

7. The outer surface of the first outer shell is modeled after the external shape of one surface of an organ. The simulated organ model according to claim 6, characterized in that the outer surface of the second outer shell is modeled after the external shape of the other surface of the organ.

8. It also includes a base for placing your own model, The outer edge of the outer shell is fixed to the outer edge of the base, One of the movable part and the drive part of the vibrator is fixed to the inside of the outer shell. The simulated organ model according to claim 1, characterized in that the other of the movable part and the drive part of the vibrator is fixed to the inside of the base.

9. It also includes a base for placing your own model, The outer shell and the base are separate. One of the movable part and the drive part of the vibrator is fixed to the inside of the outer shell. The simulated organ model according to claim 1, characterized in that the other of the movable part and the drive part of the vibrator is fixed to the inside of the base.

10. Outer shell and, The system comprises an exciter for vibrating the outer shell, The vibrator is driven by an AC signal based on the vibration of the organs. The outer shell is modeled after the external shape of a heart. The aforementioned vibrator is a plurality of, The first of the multiple vibrators is positioned at a location corresponding to the position of the outer shell that mimics the apex of the heart. A simulated organ model characterized in that the second vibrator among the plurality of vibrators is provided at a position corresponding to the position where the base of the heart of the outer shell is simulated.

11. The simulated organ model according to claim 10, characterized in that the third vibrator among the plurality of vibrators is provided at a position corresponding to the center of the outer shell which is modeled after a heart.

12. The first vibrator is excited based on vibrations collected at the apex of the heart. The simulated organ model according to claim 10, characterized in that the second vibrator is vibrated based on vibrations taken at the base of the heart.

13. The simulated organ model according to claim 10, characterized in that the first vibrator and the second vibrator are vibrated with a predetermined time difference.

14. The simulated organ model according to claim 10, characterized in that the first vibrator and the second vibrator are vibrated with a time difference between the first and second sounds of the heart.

15. The simulated organ model according to claim 11, characterized in that the third vibrator is vibrated based on vibrations taken from the center of the heart.

16. The simulated organ model according to claim 1, characterized in that the vibrator is provided inside the outer shell.

17. The simulated organ model according to claim 1, characterized in that the outer shell is modeled after the external shape of an organ.

18. The simulated organ model according to claim 1, characterized in that the AC signal based on the vibration of the organ is an AC signal proportional to the vibration of the organ.

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