Auscultation head of stethoscope

Abstract

The invention relates to an auscultation head of a stethoscope, which comprises an inner layer and an outer layer, the inner layer is completely covered by the outer layer from the upper part, at least one part between the inner layer and the outer layer is provided with a foaming material layer, and the foaming material layer is respectively and tightly attached to the inner layer and the outer layer. The stethoscope head adopting the technical scheme is good in sound insulation effect and low in cost.

Description

Technical Field

[0001] This invention relates to a stethoscope head, and more particularly to a stethoscope head with a double-layer structure. Background Technology

[0002] In existing technologies, mechanical stethoscope heads are generally single-layered, with a small number having double-layered structures. For example, US Patent 6244376B1 includes an inner layer and an outer layer that completely covers the inner layer from above. A gap exists between the inner and outer layers, and to maintain this gap, the inner and outer layers are connected by a suspension device made of an elastomeric material. This minimizes the transmission of noise from the outer layer to the inner layer, improving the clarity of auscultation. While this structure provides good sound insulation, it is complex, costly to manufacture, and has a short lifespan. Another example is Chinese Patent CN112206000A, which includes an inner layer and an outer layer that completely covers the inner layer from above. The outer layer is manufactured using a low-cost process, and at least part of the inner and outer layers are tightly bonded together to achieve a low overall cost. However, its disadvantage is that there is no sound insulation between the inner and outer layers, allowing ambient noise from the outer layer to be transmitted to the inner layer. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects of the prior art and provide a low-cost double-layer stethoscope head that blocks the sound transmission of the inner and outer layers.

[0004] The stethoscope head of the present invention includes an inner layer and an outer layer that completely covers the inner layer from above. The technical solution is that at least a portion of the space between the inner layer and the outer layer is provided with a foam material layer, which is tightly bonded to the inner layer and the outer layer respectively.

[0005] With the above technical solution, sound insulation between the inner and outer layers of the stethoscope head can be achieved without the need for expensive and complex suspension devices, and at a low cost.

[0006] A further technical solution of the present invention is that adhesive layers are provided on both sides of the foamed material layer.

[0007] The above technical solution ensures that the foam material layer adheres tightly to the inner and outer layers without shifting.

[0008] A further technical solution of the present invention is that the foamed material layer is located between the sidewalls of the inner and outer layers that are parallel to the axis.

[0009] A further technical solution of the present invention is that the foamed material layer is located between the top or bottom walls or the intermediate stepped surface of the inner and outer layers that are not parallel to the axis.

[0010] A further technical solution of the present invention is that there are no opposing walls that are not parallel to the axis and close to each other between the inner and outer layers, and there are gaps between them. Attached Figure Description

[0011] The specific content of the present invention will be further explained below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 : A schematic diagram of the structure of this embodiment. Detailed Implementation

[0013] As shown in the figure, this embodiment includes an inner layer and an outer layer that completely covers the inner layer from above. At least a portion of the inner layer and the outer layer is provided with a foam material layer, which is tightly bonded to the inner layer and the outer layer respectively.

[0014] This embodiment includes: The inner layer 1 is hollow, forming an inner cavity 10. The inner cavity 10 includes a first cavity portion 101 that is open on one side and narrows on the other side, and a second cavity portion 102 located on the narrowing side of the first cavity portion 101. The opening of the inner cavity 10 is the inner opening 111. The inner wall of the first cavity portion 101 forms a cone-shaped or bell-shaped sound collection space, and the inner wall of the second cavity portion 102 forms a columnar sound resonance space. A first through hole 14 is provided on the side wall of the second cavity portion 102. The inner layer 1 is made of a first material. The outer layer 2 covers the outside of the inner layer 1 from the side away from the inner layer opening 111 and exposes the inner layer opening 111. The outer layer 2 has a second through hole 24 at the position corresponding to the first through hole 14 on the inner layer 1. The opening of the outer layer 2 is the outer layer opening 211. The outer layer 2 is made of a second material. Connector 3, which is a hollow pipe, is connected to the first through hole 14 of the inner layer 1 through the second through hole 24 of the outer layer 2, so that the pipe space in the middle of the connector 3 is connected to the inner cavity 10. Diaphragm 4, which covers the opening of the outer layer 2; The elastic fixing ring 5 is located on the outer ring of the outer opening 211. The elastic fixing ring 5 is fixed at the outer opening 211 by the cooperation between the annular groove 51 provided on the inner wall of the elastic fixing ring 5 and the circumferentially extending flange 16 provided on the outer wall of the outer opening 211. At the same time, the edge of the diaphragm 4 is fixed at the outer opening 211 by this structure, and the diaphragm 4 closes the outer opening 211. The foam material layer 6 has a spatial shape that matches at least a portion of the outer wall of the inner layer 1 and the inner wall of the outer layer 2. The foam material layer 6 is located in the space between the inner layer 1 and the outer layer 2 with matching shapes. Each side of the foam material layer 6 is provided with an adhesive layer to bond with the inner layer and the outer layer respectively.

[0015] In the above embodiments, the material of the foaming material layer can be EVA foam, PE foam, PU foam, or acrylic foam.

[0016] In the above embodiments, there are two types of surfaces where the outer wall of the inner layer and the inner wall of the outer layer are close to each other and have matching spatial shapes. One type is the side wall parallel to the axis, and the other type is the top or bottom wall or the wall with a stepped middle surface that is not parallel to the axis. Some stethoscope heads may not have a stepped middle surface.

[0017] Because the inner layer is completely covered by the outer layer, the overall shape of the stethoscope head is not altered, allowing for flexible design within assembly limits. Therefore, the shapes of the outer wall of the inner layer and the inner wall of the outer layer do not necessarily match perfectly. Even at locations where the foam material layer is located, the shapes of the outer wall of the inner layer and the inner wall of the outer layer may not perfectly match. The matching of the spatial shapes of the outer wall of the inner layer and the inner wall of the outer layer refers to the compatibility of the spatial form enclosed by their corresponding physical contours, enabling the foam material layer to be accommodated and tightly fitted.

[0018] When a foam material layer is placed between the sidewalls of the inner and outer layers, if adhesive layers are applied to both sides of the foam material layer, relative sliding will occur between the inner and outer layers during assembly. Furthermore, the adhesion of the foam material layer to the inner and outer layers will cause shearing within the foam material layer, potentially damaging it. In this case, eliminating the adhesive layer is a better choice. The foam material layer will then fill the gap between the sidewalls of the inner and outer layers, preventing sound transmission through this gap and resulting in clearer auscultation.

[0019] When the foam material layer is placed between the top wall, bottom wall, or intermediate stepped surface, the adhesive layer can fix the position of the inner and outer layers and quickly connect them, which simplifies the positioning and connection structure of the two compared to the existing technology.

[0020] When the foam material layer is placed between the top and bottom walls, or between intermediate stepped surfaces, the sound insulation reliability can be further improved if the non-parallel walls without a foam material layer do not contact each other. The inner and outer parallel sidewalls can be close together or have a gap; in both cases, the sound insulation effect is better than existing technologies. The optimal solution is to also place a foam material layer between the inner and outer sidewalls, which will further improve the sound insulation effect. Of course, if the non-parallel top and bottom walls, or intermediate stepped surfaces without a foam material layer are close together, the sound insulation effect will be slightly worse than the non-contact solution, but still much better than existing technologies.

Claims

1. A chest piece for a stethoscope comprising an inner layer and an outer layer completely enveloping the inner layer from above, characterized in that: At least a part of the space between the inner layer and the outer layer is provided with a foamed material layer, which is tightly attached to the inner layer and the outer layer respectively.

2. The stethoscope chestpiece of claim 1, wherein: The foamed material layer is provided with adhesive layers on both sides.

3. The stethoscope chestpiece of claim 1, wherein: The foamed material layer is located between the side walls of the inner layer and the outer layer which are parallel to the axis.

4. The stethoscope chestpiece of claim 1, wherein: The foamed material layer is located between the walls of the inner layer and the outer layer which are not parallel to the axis, such as the top wall or the bottom wall or the middle step surface.

5. The stethoscope chestpiece of claim 4, wherein: The walls of the inner layer and the outer layer which are not parallel to the axis and are close to each other are not provided with the foamed material layer, and have a gap between them.

6. The stethoscope chestpiece of claim 1, wherein: The material of the foamed material layer is one of EVA foam, PE foam, PU foam and acrylic foam.

7. A stethoscope head, comprising, an inner layer, the inner layer being hollow, forming an inner layer cavity, wherein The inner layer cavity comprises a first cavity part with one open side and one contracted side, and a second cavity part located on the contracted side of the first cavity part, and the opening of the inner layer cavity is the inner layer opening, the inner wall of the first cavity part forms a conical or bell-shaped sound collecting space, and the inner wall of the second cavity part forms a cylindrical sound resonance space, and the side wall of the second cavity part is provided with a first through hole, and the inner layer is made of a first material; The outer layer is wrapped outside the inner layer from the side away from the inner layer opening and exposes the inner layer opening, and the outer layer is provided with a second through hole corresponding to the position of the first through hole on the inner layer, and the opening of the outer layer is the outer layer opening, and the outer layer is made of a second material; The connecting piece is a hollow pipe, and the connecting piece is coupled with the first through hole of the inner layer through the second through hole of the outer layer from the outside of the outer layer, so that the pipe space in the middle of the connecting piece is in communication with the inner layer cavity; The diaphragm covers the opening of the outer layer; The elastic fixing ring is located outside the outer layer opening, and the elastic fixing ring is fixed at the outer layer opening through the cooperation between the annular groove provided on the inner wall of the elastic fixing ring and the flange protruding outwardly provided on the outer wall of the outer layer opening, and the edge of the diaphragm is fixed at the outer layer opening through the structure, and the diaphragm seals the outer layer opening. The foamed material layer is located in the space between the inner layer and the outer layer which are matched in shape, and the foamed material layer is provided with adhesive layers on both sides, which are respectively adhered to the inner layer and the outer layer.

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