CN111973216A

CN111973216A - Stethoscope head matching structure

Info

Publication number: CN111973216A
Application number: CN201910806251.1A
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuxi Kaishun Medical Equipment Manufacturing Co Ltd
Current assignee: Wuxi Kaishun Medical Equipment Manufacturing Co Ltd
Priority date: 2019-05-21
Filing date: 2019-08-29
Publication date: 2020-11-24
Anticipated expiration: 2039-08-29
Also published as: CN111973216B; CN111973214B; CN211094224U; CN211094225U; CN111973214A

Abstract

The invention relates to a stethoscope head matching structure, in particular to a stethoscope head matching structure capable of improving the sound definition of organ listening and improving the listening effect. The invention relates to a stethoscope head matching structure, which comprises a stethoscope head body, a vibrating membrane and a fixing piece, wherein the stethoscope head body is provided with a sound tube; the listening head body is provided with a sound guide hole; the fixing piece is provided with an axial through hole, a fixing piece side wall used for being matched and fixed with the auditory head body and a film pressing part used for enabling the vibrating film to be tightly matched with the auditory head body; the vibrating diaphragm is arranged between the diaphragm pressing part and the auditory head body, the vibrating diaphragm is provided with an upper surface and a lower surface, a sound amplifying ring is arranged between the vibrating diaphragm and the auditory head body and/or between the vibrating diaphragm and the diaphragm pressing part, and at least part of the sound amplifying ring is positioned on the outer side of the through hole of the fixing part. The invention has the advantages of improving the sound conduction capability and improving the volume and definition of listening to the visceral organ audio.

Description

Stethoscope head matching structure

Technical Field

The invention relates to a stethoscope head matching structure, in particular to a stethoscope head matching structure which can improve the sound definition of visceral organs and improve the listening effect by virtue of the macroscopic brightness.

Background

The existing stethoscope head matching structure comprises a stethoscope head body, a vibrating membrane and a fixing piece, wherein the vibrating membrane is fixed on the stethoscope head body through the fixing piece.

The prior art takes place obvious bending through making the vibrating diaphragm, improve the listening effect like the evagination height and the tension that increase the vibrating diaphragm, though the vibrating diaphragm is favorable to the collection of audio frequency with the contact surface of listening department when having increased the auscultation behind the vibrating diaphragm evagination, the structure makes the vibrating diaphragm surface form the arch that the holding power is extremely strong, and the vibrating diaphragm outer fringe is fixed by the fixture, the vibration amplitude reduces by a wide margin when the sound wave of internal organs vibration is accepted to the arched outward appearance of vibrating diaphragm, cause the audio frequency macroscale of receiving to reduce by a wide margin and influence listening effect.

As shown in fig. 1, an annular protrusion 13 is provided on the sound collecting surface 11 of the auditory head body 1, the lower surface 22 of the diaphragm 2 is tightly attached to the annular protrusion 13, the edge 23 of the diaphragm 2 is tightly pressed on the fixing surface 15 of the auditory head body 1 by the diaphragm 2 through the pressing part 32 of the C-shaped fixing member 3, the edge 23 of the diaphragm 2 tightly pressed by the pressing part 32 of the fixing member 3 is lower than the central part 24 of the diaphragm 2 tightly attached to the annular protrusion 13, the central part 24 of the diaphragm 2 is outwardly protruded with respect to the sound collecting surface 11 of the auditory head body 1, and the central part 24 of the diaphragm 2 is outwardly protruded to bend the diaphragm 2 into an arch shape.

Because the outer edge 23 of the vibrating diaphragm 2 is fixed, the central part 24 of the vibrating diaphragm 2 protrudes outwards, the middle of the lower surface 22 of the vibrating diaphragm 2 is pressed by the annular bulge 13, the edge 23 of the vibrating diaphragm 2 is pressed downwards, the upper surface 21 of the vibrating diaphragm 2 is changed into an arch shape, the shape of the vibrating diaphragm 2 is changed, and the performance of the vibrating diaphragm 2 is changed after the vibrating diaphragm 2 is changed from a flat diaphragm to the arch-shaped diaphragm, so that the original sound transmission performance of the vibrating diaphragm 2 is damaged, and the volume and the definition of audio frequency are obviously reduced.

Secondly, the diaphragm 2 is restricted in vibration due to the edge 23 of the diaphragm 2 being pressed, and the sound transmission capability is also weakened due to the restriction of the vibration of the diaphragm due to the sound being transmitted by the vibration.

On the other hand, the prior art listens to different audio frequencies, and changes the effective maximum diameter of sound collection of the sound collection surface on the premise of not changing the depth of the sound collection cavity. Generally, when the diameter of the sound collection surface is between 38mm and 41mm, the sound collection effect is best, and in the prior art, when different audio frequencies are heard, the diameter of the sound collection surface is reduced, but the sound volume of the heard sound is low due to the reduction of the diameter of the sound collection surface, and particularly when tiny sounds are heard, misjudgment of a user is easily caused.

As shown in fig. 2 and 3, in the stethoscope tip fitting structure, the diaphragm 2 is fixed to the tip body 1 by the L-shaped fixing member 3, and when the outer diameter D1 of the tip body 1 is the same, the edge 23 of the diaphragm 2 needs to be fixed to the fixing surface 15 by the fixing member 3, so that the maximum diameter D2 of the sound collecting surface is small and the sound collecting cavity 51 is small.

Therefore, how to provide a stethoscope head matching structure capable of improving sound conduction capability and increasing the volume and definition of listening to visceral organ audio has become a technical problem to be solved urgently in the industry.

Disclosure of Invention

The invention aims to:

1) the method effectively improves the sound conduction capability and improves the volume and definition of listening to the visceral organ audio.

2) The auditory head matching structure for listening to different audio frequencies is realized by changing the vibration performance of the vibrating membrane without changing the effective maximum diameter of the sound collecting surface.

One of the objects of the invention is achieved by:

a stethoscope head matching structure comprises a stethoscope head body, a vibrating membrane, a fixing piece and a sound amplifying ring. The sound collecting surface is arranged on the auditory head body and used for collecting audio frequency emitted by human organs, and the fixing piece is provided with an axial through hole, a fixing piece side wall used for being matched and fixed with the auditory head body and a membrane pressing part used for enabling the vibration membrane to be tightly matched with the auditory head body; the fixing piece side wall and the film pressing part are integrated. The through hole is arranged on the film pressing part, and the inner side wall of the fixing part on the side wall of the fixing part is provided with a thread or a clamping groove matched with the auditory head body. The diaphragm is provided with an upper surface and a lower surface, and is arranged between the fixing piece and the auditory head body through the fixing piece.

The listening head body comprises a listening head body upper surface facing one side of the vibrating membrane, a sound guide hole for conducting audio and a sound collecting surface. The sound collection surface includes: the sound collecting side surface is connected with the sound guide hole and the upper surface of the listening head body; or the sound collecting side surface, the sound guide hole wall and the bottom surface of the sound guide hole are connected with the sound guide hole and the upper surface of the listening head body.

The vibrating membrane is as follows: 1) the outer edge of the vibrating membrane is preferably provided with no coating, and the outer edge of the vibrating membrane is provided with no coating (the outer edge of the vibrating membrane and the upper surface and the lower surface of the edge of the vibrating membrane are provided with elastic coatings; or elastic coating objects are arranged on the upper surface and the lower surface of the edge of the vibrating membrane; or the outer edge of the vibrating membrane and the upper surface of the edge of the vibrating membrane are provided with elastic coatings; or the outer edge of the vibrating membrane and the upper surface of the edge of the vibrating membrane are provided with elastic coatings; ).

2) The diaphragm is preferably a flat diaphragm, and the flat diaphragm refers to: the vibrating membrane is made of a single material, such as a resin fiber sheet or a PC sheet, and the thickness between the upper surface and the lower surface of the vibrating membrane is uniform; the thickness of the diaphragm is preferably between 0.2mm and 0.3 mm.

3) The diaphragm may be a plane on the lower surface of the diaphragm; or the part of the corresponding vibrating membrane right below the membrane pressing part of the fixing part is flat, and the upper surfaces of the rest vibrating membrane parts can be flat, convex or concave-convex.

The shape of the diaphragm is not limited, and may be circular, elliptical, regular hexagonal, or other irregular shapes.

The diaphragm preferably adopts a resin fiber sheet or a PC sheet with the same thickness between the upper surface and the lower surface, and the diaphragm has high definition due to the fact that the resin fiber sheet or the PC sheet made of a single material and with the same thickness has strong amplitude and small attenuation when sound is transmitted.

The diaphragm is preferably a resin fiber sheet or a PC sheet having a uniform thickness between the upper surface and the lower surface and having the upper surface parallel to the lower surface.

And a sound increasing ring is arranged between the vibrating diaphragm and the auditory head body and/or between the vibrating diaphragm and the diaphragm pressing part, the sound increasing ring is connected or combined with the upper surface or the lower surface of the vibrating diaphragm to form a joint part, and at least part of the joint part is positioned between the axial extension surface of the side wall of the through hole and the axial extension surface of the side wall of the fixing part or the axial extension surface of the side wall of the fixing part. After the vibrating membrane is fixed with the fixing piece, the vibrating membrane is not bent obviously. Namely, after the vibrating membrane is fixed with the fixing piece, the vibrating membrane is basically kept in a flat state.

In the above aspect, the engaging portion may form a contact closed loop with 360 degrees closed on the upper surface or the lower surface, may be a C-shaped ring with an opening, may be composed of a plurality of connecting segments, and may have a plurality of openings between the plurality of connecting segments. The shape enclosed by the contact closed loop can be circular, oval, triangular, hexagonal and the like.

The sound increasing ring can be fixed on one side of the edge of the sound collecting surface of the auditory head body or on the lower surface of the film pressing part of the fixing piece; the ring may be fixed to the diaphragm by bonding or heat fusion.

After the sound amplifying ring is contacted with or connected and fixed with the upper surface or the lower surface of the vibrating membrane, the width of a joint part formed on the upper surface or the lower surface of the vibrating membrane is not too wide, the width is preferably between 0.5mm and 1.5mm, when the sound amplifying ring is an elastic body, the hardness is preferably between 35 degrees and 60 degrees (Shore), and the joint part of the sound amplifying ring and the vibrating membrane is positioned right below the membrane pressing part and inside the edge of the vibrating membrane. The engaging portion forms a connecting closed loop or open loop on the upper surface or the lower surface.

One side of the vibrating membrane facing the sound collecting surface is the lower surface of the vibrating membrane, and one side of the vibrating membrane, which is used for contacting the sound source, is the upper surface of the vibrating membrane.

The squeeze film part of the fixing piece faces one side of the sound collecting surface and contacts one side of the vibrating membrane to form the lower surface of the squeeze film part.

In the above scheme, when one said amplifying ring is provided;

one) may be that a sound increasing ring is arranged between the lower surface of the diaphragm and the auditory head body, and the sound increasing ring is close to one side of the outer edge of the auditory head body.

The sound increasing ring can be directly fixed on the listening head body on one side of the sound collecting surface of the listening head body, and can also be fixed in a ring groove arranged on one side of the sound collecting surface of the listening head body, and the width of the ring groove is preferably larger than that of the sound increasing ring.

The ring that increases voice with the vibrating diaphragm is in the cooperation back, works as in the ring that increases voice ring is fixed in the annular of seting up on listening head body collection sound face one side, and when the width of annular was greater than the ring width, the deformation of ring that increases voice when being favorable to the vibrating diaphragm vibrations improves the vibrating diaphragm amplitude. The ring groove is formed in one side of the sound collecting surface of the auditory head body, the depth of the ring groove is preferably 55% -75% of the thickness of the sound increasing ring, namely, after the sound increasing ring is arranged in the ring groove, 25% -45% of the thickness of the sound increasing ring is axially positioned outside the ring groove. The sound increasing ring can also be directly fixed on the lower surface of the vibrating membrane through bonding or hot melting.

In the above scheme, the sound increasing ring and the vibrating membrane can be separated or integrated. Preferably, the sound-amplifying ring and the diaphragm are separate bodies.

The sound increasing ring is in contact with the lower surface of the vibrating membrane to form a joint part; or the sound amplifying ring is fixed on the lower surface of the vibrating membrane to form the joint part, the joint part can be a closed contact closed ring or a fixed closed ring, and can also form an open (such as a C-shaped ring) contact ring or a fixed ring, after the lower surface of the vibrating membrane is connected or jointed or combined with the sound amplifying ring, the lower surface of the vibrating membrane and the sound amplifying ring (can be in contact fit with the lower surface, and can also be in fixed fit with the lower surface) and the sound collecting surface of the auditory head body and the like form a sound collecting cavity together.

The joint part of the sound increasing ring and the vibrating membrane is positioned right below the membrane pressing part, and the contact surface of the lower surface of the fixing piece and the vibrating membrane is arranged in parallel at the moment, so that the force acting on the surface of the vibrating membrane is not staggered up and down, and the vibrating membrane is ensured not to be bent after being fixed.

And secondly), a sound intensifying ring can be arranged between the upper surface of the vibrating membrane and the fixing piece.

The sound increasing ring can be directly fixed on the lower surface of the film pressing part, can also be fixed in a ring groove A arranged on the lower surface of the film pressing part, and can also be integrated with the film pressing part of the fixing part and made of the same material.

The sound increasing ring is in contact with the upper surface of the vibrating membrane or is connected or combined or jointed with the upper surface of the vibrating membrane through adhesion or hot melting, a joint is formed at the connection or combination or joint of the sound increasing ring and the vibrating membrane, and the joint can be a closed loop. The closed loop may be a contact closed loop formed by the sound-adding ring contacting the upper surface of the diaphragm. At this time, the lower surface of the diaphragm and the sound collecting surface of the auditory head body form a sound collecting cavity together.

The joint of the sound amplifying ring and the vibration membrane is positioned right below the membrane pressing part.

After the film pressing part of the fixing part presses the vibrating membrane, the force acting on the upper surface of the vibrating membrane is balanced with the force acting on the lower surface of the vibrating membrane, so that the vibrating membrane is not bent after being fixed.

In the above scheme, when two said amplifying rings are provided;

one sound amplifying ring is arranged between the lower surface of the vibrating diaphragm and the auditory head body, and the other sound amplifying ring is arranged between the upper surface of the vibrating diaphragm and the film pressing part of the fixing piece.

A sound increasing ring located above the diaphragm is connected with the upper surface of the diaphragm to form a joint. The joint may be formed by a sound-increasing ring located above the diaphragm and contacting the upper surface of the diaphragm, or may be formed by bonding or fusing a sound-increasing ring and the upper surface of the diaphragm, and the joint located on the upper surface of the diaphragm may be a closed ring or an open ring. The joint part of the sound increasing ring below the vibrating membrane and the lower surface of the vibrating membrane, which is in contact with or adhered to or formed by heat fusion, can be a closed ring or an open ring.

The sound increasing ring between the lower surface of the vibrating membrane and the listening head body can be directly fixed on the listening head body on one side of the sound collecting surface of the listening head body, can also be fixed in a ring groove formed on the listening head body on one side of the sound collecting surface of the listening head body, and can also be directly fixed on the lower surface of the vibrating membrane.

The sound increasing ring between the upper surface of the vibrating diaphragm and the fixing piece can be directly fixed on the lower surface of the film pressing part and also can be fixed in a ring groove A arranged on the lower surface of the film pressing part of the fixing piece.

The lower surface of the vibrating membrane is in contact fit with the sound increasing ring and the sound collecting surface of the auditory head body to form a sound collecting cavity together. The sound collection surface includes: the sound collecting side surface is connected with the sound guide hole and the upper surface of the listening head body; or the sound collecting side surface, the sound guide hole wall and the bottom surface of the sound guide hole are connected with the sound guide hole and the upper surface of the listening head body.

The contact position of the sound increasing ring above the upper surface and the upper surface is opposite to the contact position of the sound increasing ring below the lower surface and the lower surface. Namely, the contact closed loop above the vibrating diaphragm is vertically opposite to the contact closed loop below the vibrating diaphragm, and the vibrating diaphragm is fixed on the auditory head body through the fixing piece and is not bent obviously.

In the above scheme, the sound amplifying ring is pressed against the surface of the vibrating membrane, and the film pressing part of the fixing piece is pressed tightly on the vibrating membrane, so that the vibrating membrane is not bent obviously to form an arch. That is, the center of the upper surface of the diaphragm does not protrude outward significantly, and the slight deformation caused by the fixing of the diaphragm by the pressing film portion of the fixing member is negligible, that is, the edge portion of the diaphragm is not significantly lower than the center of the diaphragm.

After the film pressing part of the fixing part compresses the vibrating membrane, the upper surface and the lower surface of the vibrating membrane are stressed in a balanced manner, and the vibrating membrane is not bent obviously. In the above-mentioned scheme, after the vibrating diaphragm with the mounting reaches the ring cooperation is fixed, the ring with the mounting inside wall of mounting lateral wall between the lower surface of vibrating diaphragm with the upper surface of the auditory head body outside the joint portion does not contact, promptly the edge of vibrating diaphragm is located the vibrating diaphragm lower surface outside the joint portion not fixed in on the auditory head body. Namely, a gap is arranged between the lower surface of the vibrating membrane positioned at the outer side of the sound amplifying ring and the upper surface of the auditory head body, namely, the lower surface of the vibrating membrane between the sound amplifying ring and the inner side wall of the fixing piece of the side wall of the fixing piece is suspended. Or be located the ring of increasing the voice with the diaphragm surface junction outside the upper surface of diaphragm with be equipped with the space between the mounting pressure membrane portion, or be located the ring of increasing the voice with the diaphragm surface junction outside, at the vibrating diaphragm the lower surface with be equipped with the space between the listening head body, the vibrating diaphragm edge is not fixed promptly, and the vibrating diaphragm edge is unsettled to be favorable to the vibrating diaphragm vibration, ensures the vibration intensity.

In the above solution, the side surface of the diaphragm (for connecting the upper surface of the diaphragm and the lower surface of the diaphragm) is not in contact with the inner side wall of the fixing piece of the side wall of the fixing piece; there may be a gap between the side surface of the diaphragm and the inner side wall of the fixing member.

In the above scheme, the sound amplifying ring is made of an elastomer, preferably silica gel, and the sound amplifying ring with elasticity can effectively enhance the vibration strength of the vibrating membrane.

In the above scheme, the material of the sound increasing ring is different from or the same as that of the diaphragm.

In the above-mentioned scheme, the material of the sound amplifying ring is the same as or different from the material of the sound collecting surface of the auditory head body or the material of the fixing piece, the arrangement of the sound amplifying ring structure increases the diameter of the sound cavity, and a gap is formed between the fixing piece film pressing part or the auditory head body at the outer side of the upper surface or the lower surface joint part of the sound amplifying ring and the vibrating membrane, namely the edge of the vibrating membrane is not fixed, and the arrangement of the gap effectively improves the vibration strength of the vibrating membrane.

In the above scheme, the cross section of the fixing piece can be in an L shape or a C shape. The fixing piece fixes the vibrating membrane in the fixing piece through the film pressing part.

In the above scheme, the longitudinal section of the sound increasing ring is triangular. The longitudinal section is similar to a triangle, one bottom edge of the amplifying ring is fixed on the auditory head body, and one corner of the triangle is used for being in contact with the vibrating membrane to reduce the contact surface of the amplifying ring and the vibrating membrane, so that the original excellent sound transmission characteristic of the vibrating membrane is ensured, and the vibration amplitude of the vibrating membrane can be enhanced.

In the above-mentioned scheme, be equipped with the annular on the upper surface of listening head body, the ring of increasing the voice is arranged in the annular, and at least in the axial direction the part of ring of increasing the voice is located the annular is outside, the vibrating diaphragm can with the direct back that supports of upper end of ring of increasing the voice, be located it is inboard to increase the voice ring the lower surface of vibrating diaphragm is not contradicted the sound collecting surface, is located the ring of increasing the voice outside the lower surface of vibrating diaphragm also can not contradict listening head body upper surface.

In the above-mentioned scheme, the mounting is fixed back with vibrating diaphragm and listening head body, and the ring that increases voice and the contact of vibrating diaphragm lower surface, the ring that increases voice support the vibrating diaphragm forms ascending holding power to the vibrating diaphragm, and pressing membrane portion and vibrating diaphragm upper surface contact compress tightly the vibrating diaphragm downwards, form the decurrent holding power to the vibrating diaphragm, the holding power with holding power formation equilibrium force or ring and vibrating diaphragm lower surface joint and vibrating diaphragm upper surface and pressing membrane joint dislocation from top to bottom, or ring and vibrating diaphragm lower surface joint are located vibrating diaphragm upper surface and pressing membrane joint under.

In the scheme, in the process that the vibration membrane is fixed by the voice amplifying ring and the fixing piece, the vibration of the vibration membrane is improved by reducing the limitation on the vibration of the vibration membrane as much as possible, and the purpose that the voice amplifying ring is beneficial to or strengthens the vibration of the vibration membrane is achieved.

In the above-described aspect, the joint between the sound-amplifying ring and the diaphragm may be a contact line or a contact surface in cross-section, and a loop formed by the contact line and the contact surface may be closed or may have an opening or a notch.

Another object of the invention is achieved in that way

In the above-mentioned scheme, a convex column is arranged on the listening head body at the inner side of the through hole of the fixing part, and the highest point of the convex column is located below the lower surface of the vibrating membrane. Not in contact with the lower surface of the diaphragm.

It does not have the sound amplifying ring between listening head body upper surface and the fixed part pressure membrane portion, does not have the sound amplifying ring promptly, only is solitary be in the fixed part be equipped with the projection on the listening head body of perforating hole inboard, the peak of projection is located the vibrating diaphragm the lower surface below, with vibrating diaphragm lower surface contactless, when the vibrating diaphragm upper surface receives pressure, obtain the high frequency sound when vibrating diaphragm lower surface contradicts with the projection upper surface.

The auditory head body on the inner side of the through hole of the fixing piece is provided with a convex column, and the highest point of the convex column is positioned below the lower surface of the vibrating membrane.

Furthermore, a convex column hole is arranged on the sound collecting surface, and the lower part of the convex column is matched and fixed with the convex column hole. The lower part of the convex column and the convex column hole can be in interference fit, can be bonded or can be in threaded fit. When the convex column is matched through threads, internal threads are arranged in the convex column hole, and external threads are arranged at the lower part of the convex column.

Or a plurality of convex columns are integrally arranged on the upper surface of the annular body, the annular body can be an annular cylinder, an annular groove is arranged on the sound collecting surface of the auditory head body, and the lower surface of the annular body with the convex columns is arranged in the groove and is matched and fixed with the annular groove.

In the above scheme, the bottom surface of the sound guide hole is provided with the convex column. The lower part of the convex column is matched and fixed with the convex column hole. The lower part of the convex column and the convex column hole can be in interference fit, can be bonded or can be in threaded fit. When the convex column is matched through threads, internal threads are arranged in the convex column hole, and external threads are arranged at the lower part of the convex column.

In the above solution, the number of the convex pillars may be 1, 2, 3, 4, 5, 6, etc., but is not limited thereto. The convex column and the auditory head body can be integrated or separated. The convex column and the listening head body can be in interference fit, bonded and can also be fixedly matched through threads.

Convex column holes can be arranged on the sound collecting surface or the bottom surface of the sound guide hole, and the lower ends of the convex columns can be matched with the convex column holes through interference fit, adhesion or threads. When the threads are matched, the outer surface of the lower end of the convex column is provided with external threads, and the hole of the convex column is internally provided with internal threads.

The upper surface (the surface contacting with the lower surface of the vibrating membrane) of the convex column can be provided with an elastic body.

When the number of the convex columns is 2 or more than 2, the convex columns are uniformly distributed outside the sound guide holes; or not uniformly distributed; the highest positions of the upper end surfaces of the convex columns are located at the same height.

In the above solution, a joint portion of the sound reinforcement ring located above the upper surface and a joint portion of the sound reinforcement ring located below the lower surface and the lower surface are aligned along an axial direction of the diaphragm, or a joint portion of the sound reinforcement ring located above the upper surface and a joint portion of the sound reinforcement ring located below the lower surface and the joint portion of the lower surface are not aligned along the axial direction of the diaphragm, and projections thereof overlap.

In the above-mentioned scheme, be equipped with limit structure on the listening head body, the mounting is fixed with listening head body, can ensure the ring of increasing voice is in the state of assisting the best vibration of trembler.

The invention has the advantages that:

1) under the condition that the outer diameters of the listening head bodies are the same, in the prior art, in order to ensure that a sound collecting cavity formed by the vibrating membrane and the sound collecting surface of the listening head body is sealed, a fixing part needs to tightly press the edge of the vibrating membrane on the listening head body, so that a 2mm-3mm annular plane is arranged on the listening head body on one side of the sound collecting surface of the listening head body, and the maximum diameter of the sound collecting surface of the sound collecting cavity is reduced by the 2mm-3mm annular plane; the invention does not need an annular plane with the width of 2mm-3mm on the sound collecting surface of the auditory head body to be used for the fixing piece to seal and fix the vibrating membrane and the auditory head body, thereby effectively improving the maximum diameter of the sound collecting cavity and further improving the sound wave collecting surface and collecting quantity.

2) The invention changes the sealing mode between the vibrating membrane and the listening head body, realizes the sealing performance between the vibrating membrane and the listening head body through the sound increasing ring, and enhances the vibration amplitude and the sensitivity of the vibrating membrane because the sound increasing ring has elasticity.

3) After the diaphragm is tightly pressed by the diaphragm pressing part of the fixing part, only one stress part is arranged on the upper surface and the lower surface of the diaphragm, and the up-down acting force at the stress part is not staggered, so that the diaphragm is not bent, the supporting force caused by the bending of the surface of the diaphragm is not generated, the vibration amplitude of the diaphragm is ensured when the diaphragm receives the vibration of a sound source, and the sound transmission intensity is ensured.

4) The structure of the invention is provided with the gap at least one position of the edge of the upper plane or the lower plane of the vibrating membrane, and the design improves the strength of the vibrating membrane during vibration.

4) After the sound amplifying ring is adopted, the sheet-shaped vibrating membrane is not deformed basically in the process of fixing the vibrating membrane by the fixing piece, the vibrating membrane does not bulge upwards, no extra supporting force is generated, the original vibration performance of the vibrating membrane is kept, the sound intensity can be effectively enhanced, the definition is not influenced, and the sound is not distorted.

5) The fixing part and the auditory head body are fixed by threads, so that the tightness between the joint part of the sound amplifying ring and the upper surface or the lower surface of the vibrating diaphragm can be ensured to be consistent for a long time, and the sensitivity of the vibrating diaphragm is ensured.

6) When fatigue and aging occur after the ring is used for a period of time, only the ring needs to be replaced, and the whole vibrating membrane does not need to be replaced. The vibration film is durable and not easy to fatigue, the service cycle of the vibration film is 2-3 times of that of the sound increasing ring (elastic body), and the use cost can be effectively reduced.

7) The center of the vibrating membrane can be depressed by applying smaller pressure, so that the lower surface of the vibrating membrane is pressed against the convex column, the wavelength received by the vibrating membrane is changed, and simultaneously, the tightness of the vibrating membrane is improved, the tension of the vibrating membrane is changed, the wavelength is changed, and the audio frequency is changed. In the prior art, different audios are listened by changing the size of the sound collecting cavity, but the invention realizes the effect of listening to different audios by changing the vibration performance of the vibrating membrane without changing the size of the sound collecting cavity, and the vibrating membrane with the structure is made of a single material and has clear and bright sound transmission and low manufacturing cost. The price of the vibrating diaphragm of the invention is 5% of the cost of the diaphragm with the elastic moving part.

8) The sound collecting surface is not reduced when the second audio frequency is obtained after pressing, and the full brightness of the volume is ensured

9) The vibrating diaphragm is the slice single material, need not to be used for the vibrating diaphragm to reciprocate the elastomer that obtains the high-frequency sound on the outer fringe of slice vibrating diaphragm in the cladding, and this cooperation structure has saved the elasticity moving member, and the sound listening is clear and surging, because of single material, does not have different material junctures and produces sound wave scattering and diffraction condition.

10) The single-material vibrating membrane has clear tone quality level, and surly and clearly-sounding

11) Can hear more clear and bright high-frequency sound without preparing a high-frequency sound collecting ring on the sound collecting surface

12) When the convex column is in the sound hole, the sound wave can generate spiral resonance on the outer side of the convex column to enhance the sound volume.

13) The vibrating diaphragm is the slice single material, need not to be used for the vibrating diaphragm to reciprocate the elastomer that obtains the high-frequency sound on the outer fringe of slice vibrating diaphragm in the cladding, and this cooperation structure has saved the elastic moving member, and tone quality level is clear, and the listening is clear surrender.

Drawings

FIG. 1 is a schematic view of a fitting structure of a stethoscope head in the prior art-1

FIG. 2 is a schematic view of a fitting structure of the stethoscope head of the prior art-2

FIG. 3 is a schematic view of the fitting structure of the stethoscope head and the diaphragm in the prior art

FIG. 4 is a schematic view of the stethoscope head matching structure of the present invention-1

FIG. 5 is a schematic view of the stethoscope head matching structure of the present invention-2

FIG. 6 is a schematic view of the stethoscope head matching structure of the present invention-3

FIG. 7 is a schematic view of the stethoscope head fitting structure of the present invention-4

Fig. 8 is a schematic view of the fitting structure of the stethoscope head with two sound amplifying rings according to the present invention.

FIG. 9 is a schematic view of the fitting structure of the stethoscope head with two sound-amplifying rings and one sound-amplifying ring integrated with the fixing member.

FIG. 10 is a schematic view of the fitting structure of the stethoscope head with two sound-amplifying rings according to the present invention.

Fig. 11 is a schematic perspective cross-sectional view of the stethoscope head fitting structure with two sound-amplifying rings according to the present invention.

Fig. 12 is a schematic cross-sectional view of fig. 11.

Fig. 13 is a right-side view of fig. 12.

Fig. 14 is an enlarged view of a portion of the mating structure of fig. 4.

In the figure:

1, a listening head body, 11 sound collecting surfaces, 12 ring grooves, 13 annular bulges, 14 upper surfaces, 15 fixing surfaces, 16 sound guide holes and 161 through hole side walls; 162 sound guide hole bottom surface, 17 limit structure, 18 convex column holes,

2 diaphragm, 21 upper surface, 22 lower surface, 23 edge, 231 lower surface of diaphragm edge, 232 upper surface of diaphragm edge, 24 center, 25 side,

3, a fixing piece, 31, a fixing piece side wall, 311, a fixing piece inner side wall, 32, 321, a film pressing part lower surface, 33, 331 and a through hole side wall; 34 the ring grooves are arranged on the outer side of the ring groove,

4 sound increasing rings, 41 upper end, 4a sound increasing ring, 4b sound increasing ring, 41a upper end,

5 gaps, 5a gaps, 5b gaps, 5c gaps, 51 sound-collecting cavities,

6 convex columns, the highest point of 61,

71 joint, 71a joint, 71b joint, 72a joint

8 the rotating shaft is arranged on the rotating shaft,

d1 outside diameter of the stethoscope head body, and D2 maximum diameter of the sound collecting surface.

Detailed Description

The present invention is further described with reference to the following drawings, which are preferred embodiments only, and are not intended to limit the scope of the present invention, but rather, are intended to cover various modifications and equivalent arrangements included within the scope of the claims of the present invention.

Example 1: the present invention is further explained with reference to FIG. 4

A stethoscope head matching structure comprises a stethoscope head body 1, a vibrating membrane 2, a fixing piece 3 and a sound amplifying ring 4.

The sound collecting surface 11 is arranged on the listening head body 1, the sound guide hole 16 is used for transmitting sound to the rotating shaft, and the annular groove 12 is used for fixing the sound increasing ring 4;

the fixture 3 is L-shaped and includes a fixture sidewall 31 for connecting with the auditory head body 1, and a diaphragm portion 32 and a through hole 33 for pressing the diaphragm 2. The through hole 33 is located on the pressing film portion 32. The fixing piece inner side wall 311 of the fixing piece side wall 31 is provided with a thread matched with the auditory head body 1.

The diaphragm 2 includes an upper surface 21 and a lower surface 22.

An annular sound increasing ring 4 is arranged between the lower surface 22 of the vibrating diaphragm 2 and the auditory head body 1, the sound increasing ring 4 is arranged in the annular groove 12 of the auditory head body 1, and the upper end part 41 of the sound increasing ring 4 is positioned outside the annular groove 12.

The diaphragm 2 is placed between the mount 3 and the auditory head body 1 through the L-shaped mount 3. The lower surface 22 of the diaphragm 2, the ring 4 and the sound collection surface 11 together form a sound collection chamber 51.

The height of the ring groove 12 is 0.6 MM; the width of the ring groove 12 is 1.2 MM; the maximum diameter of the ring 4 is 1.0 MM.

The joint 71 between the damper ring 4 and the diaphragm 2 is located directly below the diaphragm pressing portion 32. The joint 71 between the sound-increasing ring 4 and the lower surface 22 of the diaphragm 2 vertically corresponds to the joint 72 between the upper surface 21 of the diaphragm 2 and the diaphragm 32. The sound-increasing ring 4 is partially located outside the through hole 33 of the fixing member 3. The joint portion 71 is located between an axially extending surface of the through-hole side wall 331 and an axially extending surface of the fastener inner side wall 311.

A gap 5 is provided below the lower surface 231 of the diaphragm edge between the outer side of the damper ring 4 (the outer side of the joint 71 between the damper ring 4 and the diaphragm 2) and the fixture inner wall 311 of the fixture side wall 31, that is, the lower surface 231 of the diaphragm edge outside the joint 71 is not fixed, that is, the gap 5 is provided between the lower surface 231 of the diaphragm edge of the edge 23 of the diaphragm 2 and the fixing surface 15.

The joint 71 between the upper end 41 of the ring 4 and the diaphragm 2 is always located below the diaphragm pressing portion 32 of the fixture 3, i.e. the upper end 41 of the ring 4 contacts with the lower surface of the diaphragm pressing portion, and the surface of the diaphragm pressing portion contacting with the diaphragm is the lower surface of the diaphragm pressing portion.

After the diaphragm 2 directly contacts the upper end 41 of the ring 4, the lower surface 22 of the diaphragm 2 located inside the ring 4 does not contact the sound collecting surface 11, and the lower surface 231 of the diaphragm edge located outside the ring 4 does not contact the upper surface 14 of the hearing head body 1.

The sound increasing ring 4 is arranged in the ring groove 12 of the auditory head body 1, and after the vibrating membrane 2 is fixed between the sound increasing ring 4 and the fixing piece 3, the vibrating membrane 2 still keeps a flat state and is not bent.

As shown in fig. 8, there may also be 2 rings.

The sound increasing ring 4a is positioned between the lower surface 22 of the vibrating diaphragm 2 and the upper surface 14 of the auditory head body 1, the sound increasing ring 4a is arranged in a ring groove 12 formed on the upper surface 14 of the auditory head body 1, and the upper end part 41 of the sound increasing ring 4a is positioned outside the ring groove 12.

The joint 71a is formed at the contact portion between the ring 4a and the lower surface 22 of the diaphragm 2, and the joint 71a is in the form of a closed loop.

A gap 5a is provided between the lower surface 231 of the diaphragm edge located outside the joint portion 71a and the upper surface 14 of the auditory head body 1.

The sound-intensifying ring 4b is located between the upper surface 21 of the diaphragm 2 and the diaphragm portion lower surface 321 of the fixing member 3.

The lower surface 321 of the diaphragm portion is provided with a ring groove 34, the sound-increasing ring 4b is fixed in the ring groove 34, and the upper end 41a of the sound-increasing ring 4b is located outside the ring groove 34.

The height of the ring groove 12 is 0.7 mm; the width of the ring groove 12 is 1.1 mm; the maximum diameter of the ring 4 is 1.0 mm.

The ring 4b is in contact with the upper surface 21 of the diaphragm 2, a joint 72a is formed at the contact portion of the ring 4b with the upper surface 21 of the diaphragm 2, and the joint 72a is in a closed ring shape.

A gap 5b is provided between the upper surface of the diaphragm 2 located outside the joint portion 72a and the diaphragm portion lower surface 321.

A gap 5c is provided between the side surface 25 of the diaphragm 2 and the mount inner wall 311 of the mount side wall 31.

The joint 71a of the sound increasing ring 4a and the lower surface 22 of the diaphragm 2 and the joint 72a of the sound increasing ring 4b and the upper surface 21 of the diaphragm 2 are vertically opposite, and the joint 71a and the joint 72a are both located right below the pressing portion 32 of the fixing member 3 (within the horizontal projection range of the lower surface left side of the pressing portion).

The ring 4a \ 4b can also be of other forms, either continuous or intermittent. The shape is also not limited.

As can be seen from figures 11, 12 and 13,

the sound-adding ring 4b is a continuous closed loop, and has a circular cross section (or may be a semicircle, a triangle, a quadrangle, etc., without being limited thereto). The sound-increasing ring 4b is located outside the through-hole 33, and the sound-increasing ring 4b is located outside the through-hole side wall 331.

The ring 4a is discontinuous; the cross section of the ring 4b is a quadrangle (or a semicircle, a triangle, a trapezoid, a square, etc., without being limited thereto). The joint portion 71a may have a point-like, linear, or planar cross section. The part of the sound increasing ring 4a is located outside the through hole 33, that is, the part of the sound increasing ring 4b is located inside the through hole sidewall 331, and the part of the sound increasing ring 4b is located outside the through hole sidewall 331.

4 convex columns 6 are arranged on the fundamental tone surface 11, the convex columns 6 are positioned in the sound collection cavity 51, and the highest points 61 of the convex columns 6 are positioned below the lower surface 22 of the vibrating membrane 2.

The pitch surface 11 is provided with 4 convex column holes 18, and the lower parts of the 4 convex columns 6 are fixed in the convex column holes 18 through bonding. 4 convex columns 6 are uniformly distributed around the outer side of the sound guide hole 16. The convex column 6 is closely adjacent to the sound guide hole 16 on the sound collection surface, and the highest points 61 of the 4 convex columns are positioned at the same height.

Gaps are arranged between the highest point 61 of the upper end surfaces of the convex columns 6 and the lower surface 22 of the vibrating membrane 2, the gaps between the highest points 61 of the upper end surfaces of the four convex columns 6 and the lower surface 22 of the vibrating membrane 2 are consistent, and the gap value is 0.4mm

The diameter of the convex column 6 is 2mm, the height of the convex column 6 is 1.2mm, the distance from the central axis of the convex column 6 to the central axis of the sound guide hole 16 is 6.5mm, the distance from the central axis of the convex column 6 to the outer edge of the sound collecting surface is 15mm, and the adjacent convex columns 6 are distributed at equal intervals.

Example 2: the present invention will be further described with reference to FIGS. 5 to 7

The listening head body 1 is provided with a sound collecting surface 11 and a sound guide hole 16 for transmitting sound to the rotating shaft, and the upper surface 14 of the listening head body 1 is provided with a ring groove 12 for fixing the sound increasing ring 4; the sound collection surface 11 is provided with 4 convex columns 6. The highest point 61 of the stud 6 is located below the diaphragm 2 and lower than the joint 71 of the sound-intensifying ring 4 and the diaphragm 2.

The fixing piece 3 is L-shaped and comprises a fixing piece side wall 31 connected with the auditory head body 1, and the fixing piece inner side wall 311 of the fixing piece side wall 31 is provided with a thread matched with the auditory head body 1; and a diaphragm pressing portion 32 and a through hole 33 for pressing the diaphragm 2. The through hole 33 is located on the pressing film portion 32.

The diaphragm 2 includes an upper surface 21 and a lower surface 22.

The diaphragm 2 is placed between the mount 3 and the auditory head body 1 through the L-shaped mount 3. The lower surface 22 of the diaphragm 2 and the sound collection surface 11 together constitute a sound collection chamber 51.

An annular sound increasing ring 4 is arranged between the lower surface 22 of the vibrating diaphragm 2 and the upper surface 14 of the auditory head body 1, the sound increasing ring 4 is arranged in the annular groove 12 of the auditory head body 1, and the upper end part 41 of the sound increasing ring 4 is positioned outside the annular groove 12.

The joint 71 of the sound-increasing ring 4 and the lower surface 22 of the diaphragm 2 is located right below the diaphragm pressing portion 32 (i.e., within the range of the left horizontal projection of the diaphragm pressing portion 32). The joint 71 between the sound-increasing ring 4 and the lower surface 22 of the diaphragm 2 vertically corresponds to the joint 72 between the upper surface 21 of the diaphragm 2 and the diaphragm 32.

When listening to low-frequency sounds, the diaphragm 2 is brought into contact with the sound source, and the moving sounds of the organs are transmitted to the sound collecting chamber 51 through the diaphragm 2, then transmitted through the sound guide hole 16, and then transmitted through the rotation shaft.

When listening to high-frequency sound, the listening head body 1 is pressed to enable the lower surface 22 of the vibrating membrane 2 to abut against the highest point 61 of the convex column 6, so that the listening to the high-frequency sound is realized by changing the vibration characteristic of the vibrating membrane 2.

Example 3: the invention is further described with reference to fig. 9

A stethoscope head matching structure comprises a stethoscope head body 1, a vibrating membrane 2 and a fixing piece 3.

The sound collecting surface 11, the sound guide hole 16 for transmitting sound to the rotating shaft, the ring groove 12 for fixing the sound increasing ring 4a, and the upper surface 14 are arranged on the listening head body 1.

The fixture 3 is L-shaped and includes a fixture sidewall 31 for connecting with the auditory head body 1, and a diaphragm portion 32 and a through hole 33 for pressing the diaphragm 2. The through hole 33 is located on the pressing film portion 32. The fixing piece inner side wall 311 of the fixing piece side wall 31 is provided with a thread matched with the auditory head body 1. The diaphragm pressing portion 32 has a diaphragm pressing portion lower surface 321 provided with a sound increasing ring 4b, and the sound increasing ring 4b and the diaphragm pressing portion 32 are made of the same material and are integrated.

The diaphragm 2 includes an upper surface 21 and a lower surface 22.

The diaphragm 2 is placed between the mount 3 and the auditory head body 1 through the L-shaped mount 3. The diaphragm 2 is located between the sound increasing ring 4a and the sound increasing ring 4b, the lower surface 22 of the diaphragm 2 is in contact with the upper end of the sound increasing ring 4a, and the upper surface 21 of the diaphragm 2 is in contact with the lower end of the sound increasing ring 4 b.

The lower surface 22 of the diaphragm 2, the sound-increasing ring 4a, the upper surface 14, the sound-collecting surface 11, the through-hole side wall 161, and the through-hole bottom surface 162 together constitute a sound-collecting cavity 51.

An annular sound increasing ring 4a is arranged between the lower surface 22 of the vibrating diaphragm 2 and the auditory head body 1, the sound increasing ring 4a is arranged in the annular groove 12 of the auditory head body 1, and the upper end part 41 of the sound increasing ring 4a is positioned outside the annular groove 12.

The height of the ring groove 12 is 0.75 mm; the width of the ring groove 12 is 1.1 mm; the maximum diameter of the ring 4 is 1.0 mm.

The joint 71 between the damper ring 4a and the diaphragm 2 is located directly below the diaphragm pressing portion 32. The joint 71 between the sound-increasing ring 4a and the lower surface 22 of the diaphragm 2 and the joint 72 between the upper surface 21 of the diaphragm 2 and the sound-increasing ring 4b and the upper surface 21 of the diaphragm 2 are vertically opposed to each other in the axial direction of the diaphragm 2.

The sound-increasing

rings

4a and 4b are located outside the through-hole side wall 331 of the fixing member 3. The engaging

portions

71 and 72 are located between the axially extending surface of the through-hole side wall 331 and the axially extending surface of the fastener inner side wall 311.

A gap 5 is formed below the lower surface 231 of the diaphragm edge between the outer side of the sound-increasing ring 4a (the outer side of the joint portion 71 between the sound-increasing ring 4a and the diaphragm 2) and the fixture inner wall 311 of the fixture side wall 31, that is, the lower surface 231 of the diaphragm edge outside the joint portion 71 is not fixed, that is, the gap 5 is formed between the lower surface 231 of the diaphragm edge of the edge 23 of the diaphragm 2 and the fixing surface 15.

A gap 5 is formed above the upper surface 232 of the diaphragm edge between the joint portion 72 of the diaphragm 2 and the fixture inner wall 311 of the fixture side wall 31 and the lower end portion of the ring 4b, that is, the upper surface 232 of the diaphragm edge outside the joint portion 72

Is not fixed, i.e. a gap 5 is provided between the upper surface 232 of the diaphragm edge of the edge 23 of the diaphragm 2 and the diaphragm portion lower surface 321.

After the diaphragm 2 directly contacts the upper end 41 of the sound increasing ring 4a, the lower surface 22 of the diaphragm 2 located inside the sound increasing ring 4 does not contact the sound collecting surface 11, and the lower surface 231 of the diaphragm edge located outside the sound increasing ring 4a does not contact the upper surface 14 of the hearing head body 1.

The sound increasing ring 4a is arranged in the ring groove 12 of the auditory head body 1, and after the vibration membrane 2 is fixed between the sound increasing ring 4a and the sound increasing ring 4b of the fixing piece 3, the vibration membrane 2 still keeps flat and does not bend.

The sound guide hole bottom surface 162 of the through hole 16 is provided with a convex column hole 18.

The lower end of the convex column 6 is matched and fixed with the convex column hole 18. The convex column 6 is in interference fit with the convex column hole 18, or can be bonded, or an internal thread is arranged in the convex column hole 18, an external thread is arranged at the lower end of the convex column 6, and the convex column 6 can be fixed with the convex column hole 18 through thread fit.

A gap is arranged between the highest point 61 of the upper end surface of the convex column 6 and the lower surface 22 of the vibrating membrane 2, and the gap value is 0.4 mm; the convex column 6 is columnar, the diameter of the columnar convex column 6 is 2mm, the height of the convex column 6 is 7.5mm, the diameter of the sound guide hole 16 is 6mm, the depth of the sound guide hole is 6.3mm, and the distance from the central axis of the convex column 6 to the outer edge of the sound collecting surface is 21 mm.

When a user needs to listen to multiple audio frequencies, the user presses the listening head body 1 to enable the lower surface 22 of the vibrating membrane 2 to abut against the highest point 61 of the convex column 6. The diameter of the maximum effective sound collection surface of sound collection surface 11 does not change regardless of whether different audio frequencies are switched to be listened to.

In the above embodiment, the sound increasing ring 4b and the fixing member 3 may be of a separate fitting structure (as shown in fig. 10). The lower surface 321 of the film pressing part of the fixing part 3 is provided with a ring groove 34, and the sound increasing ring 4b is arranged in the ring groove 34.

In the above embodiment, when the upper surface 21 of the diaphragm 2 is pressed, the diaphragm 2 deforms downward, the lower surface 22 of the diaphragm 2 collides with the highest point 61 of the upper surface of the boss 6, and the amplitude of the diaphragm 2 changes after the collision, so that different audio frequencies (high frequencies) are obtained.

Comparative example:

the test method for the sound transmission performance of the stethoscope comprises the following steps:

wherein, the stethoscope adopted in the prior art is produced by Kacisn medical instrument manufacturing Limited company in Wuxi city

The sound collecting cavity is a cavity formed by fixing the diaphragm on the sound collecting surface of the auditory head body.

The method comprises the following steps:

1) the sound collecting cavity of the stethoscope head is placed on the sealing connecting piece on the sound source, so that the sound collecting plane of the stethoscope head, namely the stethoscope vibration film, is opposite to the sound outlet of the sound source, and the joint of the vibration film and the sound outlet is in a sealing state, namely the vertical distance between the sound outlet of the sound source and the sound collecting plane of the stethoscope head is 8-10 mm.

2) A sound guide tube with the diameter of 10mm, the aperture of 4m and the length of 40cm is connected with the head of the stethoscope

The other end of the connector is connected with an audio receiver

3) The source generator and the audio receiver are turned on and the receiver value is recorded.

4) Each structure was tested in 10 separate pieces, each piece was tested in 3 replicates and the average was taken.

5) The sound guide tube and the stethoscope head are connected by an ear hook, and the sound listening definition of the product is judged by directly auscultating heart sounds and breath sounds one by one for multiple times by human ears.

Comparison and verification test: (1)

test control group:

the structure of the invention is as follows: and a sound amplifying ring is arranged between the upper plane of the auditory head body and the lower plane of the vibrating diaphragm, the joint part of the sound amplifying ring and the vibrating diaphragm is positioned under the diaphragm pressing part, and the sound amplifying ring is made of an elastic material.

The existing product model is as follows: KS-230G Kacisn medical instruments manufacturing Co., Ltd

The structure is as follows: the sound collecting surface of the auditory head body is provided with a bulge, the fixing piece film pressing part is positioned on the outer side of the bulge, a gap is reserved between the inner side of the film pressing part and the outer side of the bulge, the fixing piece film pressing part presses the edge of the upper plane of the vibrating membrane, and the bulge is made of elastic material.

Comparison and verification test: (2)

test control group:

the structure of the invention is as follows: and a sound amplifying ring is arranged between the upper plane of the auditory head body and the lower plane of the vibrating diaphragm, the joint part of the sound amplifying ring and the vibrating diaphragm is positioned under the diaphragm pressing part, and the sound amplifying ring is made of alloy aluminum as the same as the auditory head body.

And (4) conclusion: compared with the prior art, the stethoscope head has the advantages that 1) the diameter of the sound cavity is obviously larger than that of the prior art on the premise that the outer diameter of the stethoscope head body is the same and the depth and the shape of the sound collecting surface are the same; 2) The received sound decibel value is obviously higher than that of the prior art; 3) The sound listening definition of the invention is obviously superior to that of the prior art.

Claims

1. A stethoscope head matching structure comprises a stethoscope head body, a vibrating membrane and a fixing piece; the listening head body is provided with a sound guide hole; the fixing piece is provided with an axial through hole, a fixing piece side wall used for being matched and fixed with the auditory head body and a film pressing part used for enabling the vibrating film to be tightly matched with the auditory head body; the vibrating diaphragm is arranged between the diaphragm pressing part and the auditory head body, and the vibrating diaphragm is provided with an upper surface and a lower surface, and is characterized in that: and a sound increasing ring is arranged between the vibrating membrane and the auditory head body and/or between the vibrating membrane and the membrane pressing part, and at least part of the sound increasing ring is positioned outside the through hole of the fixing part.

2. The stethoscope head engagement structure of claim 1, wherein: the sound increasing ring is connected or jointed with the upper surface or the lower surface of the vibrating membrane to form a joint part, and at least part of the joint part is positioned between the axial extension surface of the side wall of the through hole and the axial extension surface of the side wall of the fixing piece or the inner side wall of the fixing piece.

3. The stethoscope head engagement structure of claim 2, wherein: the engaging portion forms a closed loop of contact on the upper surface or the lower surface.

4. The stethoscope head engagement structure of claim 3, wherein: the sound amplifying ring is in contact with the lower surface to form a contact closed loop, and the lower surface is in contact fit with the lower surface, the sound amplifying ring and the sound collecting surface of the auditory head body form a sound collecting cavity together.

5. The stethoscope head engagement structure of claim 1, wherein: the lower surface of the vibrating membrane between the sound increasing ring and the inner side wall of the fixing piece is suspended or a gap is arranged between the upper surface of the vibrating membrane and the lower surface of the film pressing part.

6. The stethoscope head engagement structure of claim 1, wherein: the upper surface of the auditory head body is provided with an annular groove, the sound increasing ring is arranged in the annular groove, and at least the part of the sound increasing ring is positioned outside the annular groove.

7. The stethoscope head engagement structure of claim 1, wherein: the auditory head body on the inner side of the through hole of the fixing piece is provided with a convex column, and the highest point of the convex column is positioned below the lower surface of the vibrating membrane.

8. The stethoscope head engagement structure of claim 7, wherein: and a convex column is arranged on the sound collecting surface at the inner side of the through hole of the fixed part.

9. The stethoscope head engagement structure of claim 7, wherein: and the bottom surface of the sound guide hole is provided with a convex column.

10. The stethoscope head engagement structure of any one of claims 1 to 9, wherein: the joint of the sound increasing ring above the upper surface and the joint of the sound increasing ring below the lower surface and the lower surface are aligned along the axial direction of the vibrating membrane, or the joint of the sound increasing ring above the upper surface and the joint of the sound increasing ring below the lower surface and the joint of the lower surface are not aligned along the axial direction of the vibrating membrane, and the projections of the joint and the joints are overlapped.