Stethoscope and preparation method thereof

Abstract

The invention discloses a stethoscope and a preparation method thereof. The stethoscope comprises a sound guide tube and a sound guide assembly. The sound guide tube is formed by injection molding or hot press molding. The sound guide assembly is arranged in the sound guide tube, and the sound guide tube wraps the sound guide assembly in a secondary injection molding or hot press molding mode. According to the stethoscope, the sound guide assembly is arranged in the sound guide tube in advance and is coated in a secondary injection molding mode, so that the stethoscope can be directly manufactured from an injection molding machine, the step of penetrating the sound guide assembly into the hollow sound guide tube for assembly is not needed, the assembly time can be shortened, and the production efficiency can be improved. Meanwhile, according to the sound guide tube, injection molding replaces existing PVC plastic dipping process molding, the hollow sound guide tube is converted into the sound guide tube wrapping the sound guide assembly, and therefore the thickness of the tube wall of the sound guide tube can be conveniently controlled to be consistent, the product quality is improved, and environmental pollution is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a stethoscope and a method for preparing the same. Background Art

[0002] At present, a stethoscope is usually composed of a hollow sound guide tube and a sound guide assembly. When preparing the stethoscope, the hollow sound guide tube is first formed by integrally forming the hollow sound guide tube by polyvinyl chloride dip molding, and then the components of the sound guide assembly are assembled in the hollow sound guide tube.

[0003] In the process of implementing this application, the applicant found that the current stethoscope has at least the following technical problems:

[0004] 1. The assembly time of the hollow sound guide tube and the sound guide assembly is long and the assembly efficiency is low;

[0005] 2. The manufacturing process of the hollow sound guide tube makes it difficult to ensure the uniform thickness of the tube wall, which will seriously affect the appearance and sound quality of the stethoscope. Summary of the invention

[0006] The embodiments of the present application provide a stethoscope and a method for preparing the same, which solve the problems of long assembly time, low assembly efficiency and poor quality of the hollow sound guide tube and the sound guide component of the current stethoscope.

[0007] In order to solve the above technical problems, this application is implemented as follows:

[0008] In a first aspect, a stethoscope is provided, which includes a sound guide tube and a sound guide component. The sound guide tube is formed by injection molding or hot pressing. The sound guide component is arranged in the sound guide tube, wherein the sound guide tube is again formed by injection molding or hot pressing to cover the sound guide component.

[0009] In one embodiment, the sound guide tube includes a main line tube body, a first outlet line tube body and a second outlet line tube body, and one end of the main line tube body is connected to one end of the first outlet line tube body and one end of the second outlet line tube body.

[0010] In one embodiment, the main line tube body, the first outlet tube body and the second outlet tube body form a Y-shaped tube body, and the sound guide tube further includes a connecting arm, one end of the connecting arm is connected to the first outlet tube body, and the other end of the connecting arm is connected to the second outlet tube body.

[0011] In one embodiment, the connecting arm is a solid arm formed by injection molding or thermoforming.

[0012] In one embodiment, the sound guide tube includes a lower tube body and an upper tube body, the lower tube body includes the lower part of the main line tube body, the lower part of the first outlet tube body and the lower part of the second outlet tube body, the lower part of the main line tube body, the lower part of the first outlet tube body and the lower part of the second outlet tube body are injection molded as one piece, the upper tube body includes the upper part of the main line tube body, the upper part of the first outlet tube body and the upper part of the second outlet tube body, the upper part of the main line tube body, the upper part of the first outlet tube body and the upper part of the second outlet tube body are injection molded as one piece.

[0013] In one embodiment, the sound guide component includes a sound guide wire, and the sound guide tube solidly covers the outer surface of the sound guide wire.

[0014] In one embodiment, the sound guide assembly further includes a first wire outlet metal tube and a second wire outlet metal tube, part of the first wire outlet metal tube is embedded in the other end of the first wire outlet tube body, and part of the second wire outlet metal tube is embedded in the other end of the first wire outlet tube body, and one side of the sound guide wire extends out of the sound guide tube through the first wire outlet metal tube and the second wire outlet metal tube respectively.

[0015] In one embodiment, the sound guide assembly further includes a third outlet metal tube, a portion of which is embedded in the other end of the main line tube body, and the other side of the sound guide wire extends out of the sound guide tube through the third outlet metal tube.

[0016] In one of the embodiments, the cross-sectional diameter of the sound guide tube is 2 mm-15 mm.

[0017] In a second aspect, a method for preparing a stethoscope is provided, which comprises the following steps: forming a part of a sound guide tube by injection molding or hot pressing, wherein the sound guide tube has a cavity; burying a sound guide component in the cavity; and forming the sound guide tube by injection molding or hot pressing again to cover the sound guide component.

[0018] In one embodiment, the sound guide tube includes a lower tube body and an upper tube body, and the step of forming a part of the sound guide tube by injection molding or hot pressing includes: forming the lower tube body by injection molding or hot pressing.

[0019] In one embodiment, the step of burying the sound guide component in the cavity includes: burying the sound guide component in the lower tube body, wherein the cavity is the hollow part of the lower tube body.

[0020] In one embodiment, the step of forming the sound guide tube to cover the sound guide component includes: forming the upper tube body of the sound guide tube again by injection molding or hot pressing, and the upper tube body and the lower tube body solidly cover the sound guide component.

[0021] In one embodiment, the sound guide tube includes a main line tube body, a first outlet tube body and a second outlet tube body, the lower tube body includes the lower part of the main line tube body, the lower part of the first outlet tube body and the lower part of the second outlet tube body, the upper tube body includes the upper part of the main line tube body, the upper part of the first outlet tube body and the upper part of the second outlet tube body, and the main line tube body, the first outlet tube body and the second outlet tube body form a Y-shaped tube body.

[0022] In one embodiment, the sound guide tube further includes a connecting arm, the lower tube body includes the lower part of the connecting arm, one end of the lower part of the connecting arm is connected to the lower part of the first outlet tube body, the other end of the lower part of the connecting arm is connected to the lower part of the second outlet tube body, the upper tube body includes the upper part of the connecting arm, one end of the upper part of the connecting arm is connected to the upper part of the first outlet tube body, and the other end of the upper part of the connecting arm is connected to the upper part of the second outlet tube body.

[0023] In the embodiment of the present application, the sound guide component is pre-set in the sound guide tube, and the sound guide component is coated by injection molding or hot pressing again, so that the stethoscope can be directly made from the injection molding machine, without the step of inserting the sound guide component into the hollow sound guide tube for assembly, which can reduce the assembly time and improve production efficiency. At the same time, the sound guide tube of the present application is formed by replacing the current PVC dipping process with injection molding, and the hollow sound guide tube is converted into a sound guide tube coated with the sound guide component, which makes it easy to control the wall thickness of the sound guide tube to be consistent, improve product quality, and reduce environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 is a stereoscopic diagram of the stethoscope of the present application;

[0026] Figure 2 is an exploded view of the stethoscope of the present application;

[0027] Figure 3 It is a flow chart of the steps of the method for preparing the stethoscope of the present application.

[0028] The following are explained in conjunction with the accompanying drawings: 1: stethoscope; 2: sound guide tube; 201: lower tube body; 202: upper tube body; 203: cavity; 21: main line tube body; 211: lower part of main line tube body; 212: upper part of main line tube body; 22: first outlet tube body; 221: lower part of first outlet tube body; 222: upper part of first outlet tube body; 23: second outlet tube body; 231: lower part of second outlet tube body; 232: upper part of second outlet tube body; 24: connecting arm; 241: lower part of connecting arm; 242: upper part of connecting arm; 3: sound guide assembly; 31: sound guide wire; 32: first outlet metal tube; 33: second outlet metal tube; 34: third outlet metal tube. DETAILED DESCRIPTION

[0029] The embodiments of the present invention will be described below with reference to the accompanying drawings. In these drawings, the same reference numerals represent the same or similar components or method flows.

[0030] It must be understood that the words "comprise", "include", etc. used in this specification are configured to indicate the existence of specific technical features, values, method steps, job processing and / or components, but do not exclude the addition of more technical features, values, method steps, job processing, components, or any combination of the above.

[0031] It should be understood that when a component is described as being "connected" or "coupled" to another component, it may be directly connected or coupled to the other component, and intermediate components may be present. Conversely, when a component is described as being "directly connected" or "directly coupled" to another component, there are no intermediate components.

[0032] In addition, although the terms “first”, “second”, . . . , etc. are used herein to describe different elements, such terms are merely used to distinguish elements or operations described with the same technical terms.

[0033] See also Figure 1, which is a stereoscopic diagram of the stethoscope of the present application; as shown in the figure, the stethoscope 1 of the present embodiment is mainly used in electronic stethoscopes to simplify the assembly of electronic stethoscopes. In the present embodiment, the stethoscope 1 includes a sound guide tube 2 and a sound guide component 3. The sound guide tube 2 is formed by injection molding or hot pressing. For example, in the injection molding process, thermosetting rubber or thermoplastic rubber is poured into the sound guide tube mold for injection molding. The sound guide component 3 is arranged in the cavity of the sound guide tube 2. The sound guide tube 2 is coated with the sound guide component 3 by injection molding or hot pressing again. In other words, the sound guide component 3 is pre-placed in the preliminary injection sound guide tube mold, and the sound guide component 3 is coated by injection molding or hot pressing again. There is no space in the cavity between the sound guide tube 2 and the sound guide component 3, that is, the sound guide tube 2 is coated with the sound guide component 3 in a solid manner. In this way, the stethoscope 1 can be directly manufactured from the sound guide tube mold without the need to insert the sound guide component 3 into the hollow sound guide tube 2 for assembly, which can reduce assembly time and improve production efficiency. The sound guide tube 2 of this embodiment is formed by replacing the current PVC dipping process with injection molding or hot pressing molding, and the hollow sound guide tube 2 is transformed into a sound guide tube 2 covering the sound guide component 3, which makes it easy to control the wall thickness of the sound guide tube 2 to be consistent, improve product quality, and reduce environmental pollution.

[0034] The following is a detailed description of the structure of the sound guide tube 2 and the sound guide assembly 3. Figure 1 As shown, the sound guide tube 2 includes a main line tube body 21, a first outlet tube body 22 and a second outlet tube body 23. One end of the main line tube body 21 is connected to one end of the first outlet tube body 22 and one end of the second outlet tube body 23 at the same time, and the main line tube body 21, the first outlet tube body 22 and the second outlet tube body 23 form a Y-shaped tube body. The sound guide component 3 is arranged in the Y-shaped tube body, and one side of the sound guide component 3 extends through the first outlet tube body 22 and the second outlet tube body 23 of the Y-shaped tube body and is connected to the listening part (not shown in the figure), and the listening part is, for example, headphones. The other side of the sound guide component 3 extends through the main line tube body 21 of the Y-shaped tube body and is connected to the sound pickup part (not shown in the figure), and the sound pickup part is, for example, a chest piece.

[0035] As mentioned above, the sound guide tube 2 further includes a connecting arm 24. One end of the connecting arm 24 is connected to the first outlet tube body 22, and the other end of the connecting arm 24 is connected to the second outlet tube body 23. The connecting arm 24 is a solid arm formed by injection molding or hot pressing. In the injection molding process, thermosetting rubber or thermoplastic rubber is poured into the sound guide tube mold for injection molding to form the sound guide tube 2 and the connecting arm 24 is formed at the same time. In the actual application of the stethoscope 1, a certain degree of clamping force is required between the first outlet tube body 22 and the second outlet tube body 23 of the Y-shaped tube body. At present, the stethoscope usually sets a metal clamping component between the two tube bodies, and the metal clamping component provides metal clamping force for the two tube bodies. In this embodiment, a connecting arm 24 is set between the first outlet tube body 22 and the second outlet tube body 23, and the inherent elasticity of the rubber of the connecting arm 24 is used to replace the original metal clamping force, so as to improve the clamping efficiency, simplify the manufacturing process and reduce the production cost.

[0036] See also Figure 1 As shown, the cross-sectional diameter of the sound guide tube 2 is 2mm-15mm. The sound guide tube 2 includes a lower tube body 201 and an upper tube body 202. Please refer to Figure 2 , which is an exploded view of the stethoscope of the present application; as shown in the figure, the lower tube body 201 includes the lower part 211 of the main tube body 21, the lower part 221 of the first outlet tube body 22 and the lower part 231 of the second outlet tube body 23. In this embodiment, the lower part 211 of the main tube body 21 is the lower half of the tube body of the main tube body 21 cut horizontally along the axis, the lower part 221 of the first outlet tube body 22 is the lower half of the tube body of the first outlet tube body 22 cut horizontally along the axis, and the lower part 231 of the second outlet tube body 23 is the lower half of the tube body of the second outlet tube body 23 cut horizontally along the axis. The lower part 211 of the main tube body 21, the lower part 221 of the first outlet tube body 22 and the lower part 231 of the second outlet tube body 23 are integrally formed by injection molding. In the injection molding process, thermosetting rubber or thermoplastic rubber is poured into a corresponding mold for injection molding to form the lower tube body 201. The upper tube body 202 includes an upper portion 212 of the main tube body 21, an upper portion 222 of the first outlet tube body 22, and an upper portion 232 of the second outlet tube body 23. The upper portion 212 of the main tube body 21 is an upper half of the tube body of the main tube body 21 cut horizontally along the axis, the upper portion 222 of the first outlet tube body 22 is an upper half of the tube body of the first outlet tube body 22 cut horizontally along the axis, and the upper portion 232 of the second outlet tube body 23 is an upper half of the tube body of the second outlet tube body 23 cut horizontally along the axis. The upper portion 212 of the main tube body 21, the upper portion 222 of the first outlet tube body 22, and the upper portion 232 of the second outlet tube body 23 are integrally formed by injection molding. In the injection molding process, the sound guide component 3 is placed in the lower tube body 201 in advance, and then the thermosetting rubber or thermoplastic rubber is poured into the corresponding mold for injection molding to form the upper tube body 202. The upper tube body 202 and the lower tube body 201 cover the sound guide component 3.

[0037] See also Figure 1 and Figure 2 As shown, the sound guide component 3 includes a sound guide wire 31. Preferably, the sound guide tube 2 solidly covers the outer surface of the sound guide wire 31, that is, the sound guide wire 31 is solidly covered so that there is no space (or no gap) between the sound guide tube 2 and the sound guide wire 31. The sound guide component 3 further includes a first outlet metal tube 32 and a second outlet metal tube 33. Part of the first outlet metal tube 32 is embedded in the other end of the first outlet tube body 22. Part of the second outlet metal tube 33 is embedded in the other end of the first outlet tube body 22. One side of the sound guide wire 31 extends out of the sound guide tube 2 through the first outlet metal tube 32 and the second outlet metal tube 33 respectively. The sound guide component 3 further includes a third outlet metal tube 34. Part of the third outlet metal tube 34 is embedded in the other end of the main line tube body 21. The other side of the sound guide wire 31 extends out of the sound guide tube 2 through the third outlet metal tube 34. In this embodiment, the sound guide wire 31 is a Y-shaped wire, which corresponds to the Y-shaped tube body. The first outlet tube body 22, the second outlet tube body 23 and the main line tube body 21 cover the outer surface of the Y-shaped wire. One side of the Y-shaped wire extends out of the first outlet tube body 22 and the second outlet tube body 23 through the first outlet metal tube 32 and the second outlet metal tube 33 and connects to the listening part. The other side of the Y-shaped wire extends out of the main line tube body 21 through the third outlet metal tube 34 and connects to the sound pickup part. In addition, the sound guide assembly 3 can also add other components according to needs.

[0038] See also Figure 3 Also see Figure 1 and Figure 2 As shown, Figure 3It is a flow chart of the steps of the preparation method of the stethoscope of the present application; as shown in the figure, the preparation method of the stethoscope of the present embodiment includes the following steps S1 to S3. First, in step S1, a part of the sound guide tube 2 is formed by injection molding or hot pressing, and the sound guide tube 2 has a cavity 203. In the first injection molding process, thermosetting rubber or thermoplastic rubber is poured into an injection molding machine for injection molding to form a sound guide tube 2 with a cavity 203, which can also be achieved by a hot pressing process. Then in step S2, the sound guide component 3 is buried in the cavity 203. Finally, in step S3, the sound guide tube 2 is formed again by injection molding or hot pressing to cover the sound guide component 3. In the second injection molding process, thermosetting rubber or thermoplastic rubber is poured into an injection molding machine for injection molding to form a sound guide tube 2 covering the sound guide component 3, that is, the sound guide component 3 is covered in a solid manner, which can also be achieved by a hot pressing process. In this embodiment, a portion of the sound guide tube 2 is first injected into the appearance of the sound guide tube 2, and the portion of the sound guide tube 2 has a groove as the cavity 203, and then the internal parts (sound guide component 3) are buried in the groove. Then, the final appearance is injected as a whole, and thermoplastic rubber or thermosetting rubber can be used as the injection material. The preparation method can also be made by a hot pressing molding process, first making a portion or half of the product, burying the parts into the mold cavity and the product, and finally injecting thermoplastic rubber or thermosetting rubber. The final appearance can also be made by a hot pressing molding process. The preparation method of the stethoscope in this embodiment uses double injection molding and thermoplastic molding processes to cover the sound guide component 3 in the sound guide tube 2, thereby replacing the current assembly process of the stethoscope and improving product quality and production efficiency.

[0039] See also Figure 1 and Figure 2 As shown, in this embodiment, the sound guide tube 2 includes a lower tube body 201 and an upper tube body 202. The lower tube body 201 is the lower half of the tube body of the sound guide tube 2 cut horizontally along the axis. The sound guide tube 2 includes a main line tube body 21, a first outlet tube body 22 and a second outlet tube body 23, and the main line tube body 21, the first outlet tube body 22 and the second outlet tube body 23 form a Y-shaped tube body. The lower tube body 201 includes a lower portion 211 of the main line tube body 21, a lower portion 221 of the first outlet tube body 22 and a lower portion 231 of the second outlet tube body 23. The sound guide tube 2 further includes a connecting arm 24. The lower tube body 201 includes a lower portion 241 of the connecting arm 24, one end of the lower portion 241 of the connecting arm 24 is connected to the lower portion 221 of the first outlet tube body 22, and the other end of the lower portion 241 of the connecting arm 24 is connected to the lower portion 231 of the second outlet tube body 23. In step S1, the lower tube body 201 is injection molded.

[0040] As mentioned above, in step S2, the sound guide component 3 is buried in the lower tube body 201, wherein the cavity 203 is the hollow part of the lower tube body 201. In step S3, the upper tube body 202 of the sound guide tube 2 is formed again by injection molding or hot pressing, and the upper tube body 202 and the lower tube body 201 solidly cover the sound guide component 3. The upper tube body 202 is the upper half of the sound guide tube 2 cut horizontally along the axis. The upper tube body 202 includes the upper part 212 of the main line tube body 21, the upper part 222 of the first outlet tube body 22, and the upper part 232 of the second outlet tube body 23. The upper tube body 202 further includes an upper portion 242 of the connecting arm 24 , one end of the upper portion 242 of the connecting arm 24 is connected to the upper portion 222 of the first outlet tube body 22 , and the other end of the upper portion 242 of the connecting arm 24 is connected to the upper portion 232 of the second outlet tube body 23 .

[0041] In summary, the present application provides a stethoscope and a method for preparing the same. First, a portion of the sound guide tube is ejected, and the portion of the sound guide tube has a groove as a cavity. Then, the internal parts are embedded in the groove. Finally, the final overall appearance is ejected. Thermoplastic rubber or thermosetting rubber can be used as the ejection material. The preparation method can also be made using a hot pressing molding process. First, a portion or half of the product is made, and the parts are embedded in the mold cavity and the product. Finally, thermoplastic rubber or thermosetting rubber is ejected. The hot pressing molding process can also be used to make the final overall appearance. In this way, the stethoscope can be directly made from the injection molding machine without the need to perform the steps of inserting the sound guide component into the hollow sound guide tube for assembly. This can reduce assembly time and improve production efficiency. At the same time, the sound guide tube of the present application is formed by replacing the current PVC dipping molding process with injection molding, and the hollow sound guide tube is transformed into a sound guide tube that covers the sound guide component. This makes it easy to control the wall thickness of the sound guide tube to be consistent, improve product quality, and reduce environmental pollution.

[0042] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0043] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A stethoscope, characterized in that: include: The sound guide tube is formed by injection molding or hot pressing; The sound guide component is arranged in the sound guide tube, wherein the sound guide tube covers the sound guide component by a second injection molding or hot pressing molding method.

2. The stethoscope according to claim 1, characterized in that: The sound guide tube includes a main line tube body, a first outlet tube body and a second outlet tube body, and one end of the main line tube body is connected to one end of the first outlet tube body and one end of the second outlet tube body at the same time.

3. The stethoscope according to claim 2, characterized in that: The main line tube body, the first outlet tube body and the second outlet tube body form a Y-shaped tube body, and the sound guide tube further includes a connecting arm, one end of the connecting arm is connected to the first outlet tube body, and the other end of the connecting arm is connected to the second outlet tube body.

4. The stethoscope according to claim 3, characterized in that: The connecting arm is a solid arm formed by injection molding or thermoforming.

5. The stethoscope according to claim 2, characterized in that: The sound guide tube includes a lower tube body and an upper tube body, the lower tube body includes the lower part of the main line tube body, the lower part of the first outlet tube body and the lower part of the second outlet tube body, the lower part of the main line tube body, the lower part of the first outlet tube body and the lower part of the second outlet tube body are injection molded as one piece, the upper tube body includes the upper part of the main line tube body, the upper part of the first outlet tube body and the upper part of the second outlet tube body, the upper part of the main line tube body, the upper part of the first outlet tube body and the upper part of the second outlet tube body are injection molded as one piece.

6. The stethoscope according to claim 2, characterized in that: The sound guide component includes a sound guide wire, and the sound guide tube solidly covers the outer surface of the sound guide wire.

7. The stethoscope according to claim 6, characterized in that: The sound guide component further includes a first wire outlet metal tube and a second wire outlet metal tube, part of the first wire outlet metal tube is embedded in the other end of the first wire outlet tube body, and part of the second wire outlet metal tube is embedded in the other end of the first wire outlet tube body, and one side of the sound guide wire extends out of the sound guide tube through the first wire outlet metal tube and the second wire outlet metal tube respectively.

8. The stethoscope according to claim 6, characterized in that: The sound guide assembly further includes a third outlet metal tube, a portion of which is embedded in the other end of the main line tube body, and the other side of the sound guide wire extends out of the sound guide tube through the third outlet metal tube.

9. The stethoscope according to claim 1, characterized in that: The cross-sectional diameter of the sound guide tube is 2mm-15mm.

10. A method for preparing a stethoscope, characterized in that: The following steps are involved: A part of the sound guide tube is formed by injection molding or hot pressing, wherein the sound guide tube has a cavity; burying the sound guide component in the cavity; and The sound guide tube is formed again by injection molding or hot pressing to cover the sound guide component.

11. The method for preparing a stethoscope according to claim 10, characterized in that: The sound guide tube includes a lower tube body and an upper tube body, and the steps of forming a part of the sound guide tube by injection molding or hot pressing molding include: The lower tube body is formed by injection molding or hot pressing molding.

12. The method for preparing a stethoscope according to claim 11, characterized in that: The step of embedding the sound guide component in the cavity comprises: The sound guide assembly is buried in the lower tube body, wherein the cavity is the hollow portion of the lower tube body.

13. The method for preparing a stethoscope according to claim 12, characterized in that: The steps of forming the sound guide tube to cover the sound guide component include: The upper tube body of the sound guide tube is formed again by injection molding or hot pressing molding, and the upper tube body and the lower tube body solidly cover the sound guide component.

14. The method for preparing a stethoscope according to claim 13, characterized in that: The sound guide tube includes a main line tube body, a first outlet tube body and a second outlet tube body, the lower tube body includes the lower part of the main line tube body, the lower part of the first outlet tube body and the lower part of the second outlet tube body, the upper tube body includes the upper part of the main line tube body, the upper part of the first outlet tube body and the upper part of the second outlet tube body, and the main line tube body, the first outlet tube body and the second outlet tube body form a Y-shaped tube body.

15. The method for preparing a stethoscope according to claim 14, characterized in that: The sound guide tube further includes a connecting arm, the lower tube body includes the lower part of the connecting arm, one end of the lower part of the connecting arm is connected to the lower part of the first outlet tube body, the other end of the lower part of the connecting arm is connected to the lower part of the second outlet tube body, the upper tube body includes the upper part of the connecting arm, one end of the upper part of the connecting arm is connected to the upper part of the first outlet tube body, and the other end of the upper part of the connecting arm is connected to the upper part of the second outlet tube body.

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