CN1118244A - Stethoscope - Google Patents
Stethoscope Download PDFInfo
- Publication number
- CN1118244A CN1118244A CN 94116105 CN94116105A CN1118244A CN 1118244 A CN1118244 A CN 1118244A CN 94116105 CN94116105 CN 94116105 CN 94116105 A CN94116105 A CN 94116105A CN 1118244 A CN1118244 A CN 1118244A
- Authority
- CN
- China
- Prior art keywords
- stethoscope
- human body
- speaker
- wave signal
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013078 crystal Substances 0.000 claims abstract description 5
- 210000000038 chest Anatomy 0.000 claims description 14
- 210000000481 breast Anatomy 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 230000003321 amplification Effects 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 230000000747 cardiac effect Effects 0.000 abstract description 2
- 230000005236 sound signal Effects 0.000 abstract 2
- 238000002555 auscultation Methods 0.000 description 11
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 210000002216 heart Anatomy 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000036772 blood pressure Effects 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000004072 lung Anatomy 0.000 description 2
- 230000001575 pathological effect Effects 0.000 description 2
- 210000000779 thoracic wall Anatomy 0.000 description 2
- 235000006369 Emex spinosa Nutrition 0.000 description 1
- 241000719150 Hemicaranx leucurus Species 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 230000003187 abdominal effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000002458 fetal heart Anatomy 0.000 description 1
- 210000003754 fetus Anatomy 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000003601 intercostal effect Effects 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
Images
Landscapes
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The medical stethoscope features that internal audio signals in body may be clearly and correctly listened as they are first converted into electric signals by a structure such as microphone or acousto-electric crystal, then amplified by an IC amplifier circuit and finally converted into audio signals by earphone or speaker. Based on the same principle, a cardiac sound monitor may be made up.
Description
The present invention relates to medical instruments field
After human body was ill, the most frequently used diagnosis medical apparatus and instruments was a stethoscope.During health check-up, need lungs, heart, abdominal viscera, blood vessel etc. to be carried out auscultation, and measure blood pressure and use with it.Existing stethoscope will by air borne, import hearer's in ear through piece for stethoscope,chest into by the various sound that send in the human body, and volume is less.Under many circumstances, make human body pulmonary respiration sound, the dimnition of cardiac sound as physiological, pathologic factor; The ward environment noise is higher; The auscultation fetal heart sound; When measuring severe shock patient blood pressure etc., all can be too little because of the stethoscope volume, influence the auscultation effect, very cause the generation deviation.
The objective of the invention is to, change existing auscultation with stethoscope principle, the loud amplitude of sending in the human body is amplified, thereby improve the accuracy of auscultation.
Purpose of the present invention realizes in the following manner.
Stethoscope of the present invention comprises the breast spare that contacts by with human body; Change acoustic signals the structure of electric wave signal into, as post pole microphone, acoustic-electric crystal etc.; The air conduit that connects chest piece and microphone; The amplifying circuit that electric wave signal is amplified; Electric wave signal is reduced to the structure of acoustic signals, as earphone, speaker etc.; And some leads, power-supply battery, three terminal regulator etc.Its principle is: by the chest piece of the acoustic signals that sends in the human body by contacting with it, import in the air conduit, change acoustic signals into electric wave signal by the post pole microphone in the conduit, by amplifying circuit electric wave signal is amplified significantly again, the electric wave signal that has amplified at last is reduced to acoustic signals by earphone or speaker, import hearer's in ear into, thereby obtain an acoustic signals that has amplified.Stethoscope of the present invention is characterized in that: (1) has a structure that the acoustic signals that sends in the human body can be changed into electric wave signal, as post pole microphone, acoustic-electric crystal etc.(2) amplifying circuit that this electric wave signal can be amplified is arranged, the circuit of forming as integrated circuit or a plurality of audion etc.(3) structure that the electric wave signal after amplifying can be changed into acoustic signals is arranged, as earphone, speaker etc.
Existing piece for stethoscope,chest is divided into cydariform and bell two kinds, and the cydariform chest piece is made up of metal except that a thin vibrating diaphragm entirely.Metallic hard is difficult for being adjacent to the patient of thoracic wall, particularly skeletonize; Metal is smooth, and easily sliding on human body produces adventitious sound; In winter, metal is too cool, often needs every the clothing auscultation.So all influence the auscultation effect.In order to change this shortcoming, the cydariform chest piece part that needs contact with human body can be slightly soft, rubber makes.No matter cydariform or bell shape chest piece in addition, the contact surface of itself and human body can be circle, also can make square, rectangle.
In order to change the shortcoming that existing stethoscope only can single auscultation, can on lead, establish an active coupling structure, can also can hear per capita around making by the dress earphone by the bigger speaker of dress power, be convenient to many people auscultations simultaneously.
In addition, if it is the lead setting between microphone and amplifying circuit is very long, increase supply voltage (as the illumination alternating current), reach the amplifying circuit and the powerful speaker of impedance phase coupling with it, and fixedly chest piece at pareordia, then can monitor patient's hear sounds a long way off, a plurality of patients monitor reason too.
The present invention compares with existing stethoscope, owing to can increase substantially the various sound that send in the human body, thereby to any position of human body, the sound that sends as lungs, heart, blood vessel, heart of fetus, no matter be physiological, still pathologic, all can more clearly hear, improved the auscultation accuracy.Because can be by dress power bigger speaker, thus can many people's while auscultations, and this is particularly suitable when teaching is made the rounds of the wards.Owing to can monitor patient's hear sounds a long way off, monitor instrument so can be made into hear sounds.Because the contact portion of chest piece and human body is made with plastic substance, reduce adventitious sound so more can be close to thoracic wall, and use winter not cool.The chest piece contact surface is square, the easier skeletonize patient intercostal space of putting into.
Below by embodiment and accompanying drawing thereof, the present invention is further described.
Fig. 1 is the floor map in kind of a kind of embodiment.(1) be chest piece, itself and people's contact level (2) are made for soft rubber, link to each other with viscose glue or tongue and groove between (1), (2), (3) be the thin vibrating diaphragm of chest piece, (4) be the air conduit that links to each other with (1), in a post pole microphone (5) is set, air communicates between (3) and (5).(5) link to each other with amplifying circuit box (7) by lead (6), (7) there is the switch turn-knob (8) of a control volume on the surface, (9) for being arranged on an active coupling structure on the lead, include a little jack, by jack with plug (10) thus closely link to each other connect and earphone (12) or speaker (14) between circuit, (11) be fixing (12) elastic support on hearer's head, (12) surface coverage one deck sponge (13).
Fig. 2 is the simple circuit block diagram of embodiment.Wherein (15) are three terminal regulator, to guarantee to spread out of the wave volume of earphone, and not because of the mains voltage variations significant change, thus the stability of assurance earphone sound.(16) being amplifying circuit, is that an integrated package constitutes, and still is provided with a volume potentiometer in the amplifying circuit, the scalable volume.
Realize best way of the present invention, post pole microphone (5) or acoustic-electric crystal want that enough little (5) will be complementary with the impedance parameter of (16) to match with air conduit (4), and be undistorted with the sound that sends in the assurance speaker, so will design an integrated circuit.Volume potentiometer, when regulating volume, its minimal volume preferably is equivalent to existing stethoscope volume, so that the auscultator can adapt to use the present invention gradually.In addition, the volume of power-supply battery, three terminal regulator, volume potentiometer, integrated package, weight are all the smaller the better, so that stethoscope is easy to carry.
Claims (4)
1, a kind of stethoscope includes breast spare; Microphone (or acoustic-electric is not brilliant); By the amplification circuit of electrical signal that power supply, lead, switch, integrated package constituted; And earphone (or speaker).It is characterized in that: (1) has a structure that the acoustic signals that sends in the human body can be changed into electric wave signal, as post pole microphone, acoustic-electric crystal etc.; (2) amplifying circuit that this electric wave signal can be amplified is arranged, the circuit of forming as integrated circuit or a plurality of audion, resistance etc.; (3) structure that the electric wave signal after amplifying can be changed into acoustic signals is arranged, as earphone, speaker etc.
2, stethoscope as claimed in claim 1 is characterized in that the contact surface of its chest piece and human body, can be slightly soft, plastic material such as rubber etc. makes.
3, stethoscope as claimed in claim 1 is characterized in that the contact plane of its chest piece and human body can be made into square or rectangle.
4, stethoscope as claimed in claim 1, it is characterized in that can be by being provided with than long lead, and the increase supply voltage is made hear sounds and is monitored instrument after reaching the amplifying circuit and speaker that impedance phase mates with it, a long way off patient's hear sounds is monitored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94116105 CN1118244A (en) | 1994-09-08 | 1994-09-08 | Stethoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94116105 CN1118244A (en) | 1994-09-08 | 1994-09-08 | Stethoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1118244A true CN1118244A (en) | 1996-03-13 |
Family
ID=5037791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94116105 Pending CN1118244A (en) | 1994-09-08 | 1994-09-08 | Stethoscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1118244A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111685792A (en) * | 2020-04-30 | 2020-09-22 | 北京同乐宇科技开发有限公司 | High-definition electroacoustic stethoscope |
-
1994
- 1994-09-08 CN CN 94116105 patent/CN1118244A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111685792A (en) * | 2020-04-30 | 2020-09-22 | 北京同乐宇科技开发有限公司 | High-definition electroacoustic stethoscope |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |