electronic machinery

Abstract

To provide a means for attaching elements with a simple structure. [Solution] The stethoscope 1 comprises a piezoelectric element 4 and a holder 3 that holds the piezoelectric element 4 by sandwiching it from its outer circumference. The holder 3 has a base 3a and a holding portion 3b that is bent inward from the outer circumference of the base 3a. The holder 3 holds the piezoelectric element 4 by sandwiching its outer circumference, with the outer circumference of the piezoelectric element 4 fitted into the space between the base 3a and the holding portion 3b. The housing 2 has an opening corresponding to the outer shape of the base 3a of the holder 3, and the engaging claws 3c of the holder 3 engage with the opening end.

Description

[Technical Field]

[0001] The present invention relates to an electronic device. [Background Art]

[0002] Among stethoscopes, there is a type called so-called electronic stethoscope, which electronically collects sounds such as heart sounds with a sensor such as a microphone, amplifies the collected sounds, and allows a doctor or the like to listen to the amplified sounds. In the stethoscope described in Patent Document 1, a piezo (piezoelectric) element is used to collect sounds. FIG. 17 is a perspective view showing a conventional stethoscope. In FIG. 17, a cover covering a piezo element 102 and the like is removed from the stethoscope 101. As illustrated, the piezo element 102 is mechanically fixed to a holder 103 with a screw 104. [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2024-027219 [Summary of the Invention] [Problems to be Solved by the Invention]

[0004] In conventional stethoscopes, since the piezo element is fixed to the holder with a screw, a space for the screw is required. In addition, since the screw creates unevenness on the planar surface, the cover covering the piezo element also has unevenness, which affects sound collection. Furthermore, during manufacturing, it is necessary to control the tightening strength of the screw, making assembly management difficult. That is, conventional stethoscopes have a complicated structure that uses screws for attaching the piezo element, which has caused various problems. is provided.

[0005] An object of the present invention is to provide means capable of attaching an element with a simple structure. [Means for Solving the Problems]

[0006] The electronic device of the first invention is characterized by comprising an element and a holder that holds the element by sandwiching it from the outer circumference.

[0007] In this invention, the element is held by being sandwiched between holders. This allows the element to be attached to an electronic device with a simple structure without the need for screws or the like.

[0008] The electronic device of the second invention is characterized in that, in the electronic device of the first invention, the holder has a base and a holding portion that is bent inward from the outer circumference of the base.

[0009] The electronic device of the third invention is characterized in that, in the electronic device of the second invention, the holder holds the outer circumference of the element by sandwiching it, with the outer circumference of the element fitted into the space between the base and the holding portion.

[0010] The electronic device of the fourth invention is characterized in that, in the electronic device of the second invention, the base of the holder becomes a contact surface with the object from which sound is collected when sound is collected by the element.

[0011] The electronic device of the fifth invention comprises an element and a holder for holding the element, wherein the holder has an engaging claw that engages with a housing.

[0012] In this invention, the holder for holding the element has engaging claws that engage with the housing. As a result, the holder for holding the element is attached to the housing of the electronic device by the engaging claws, and the element can be attached to the electronic device with a simple structure without using screws or the like.

[0013] The electronic device of the sixth invention is characterized in that, in the electronic device of the fifth invention, the holder has a base and an engaging claw protruding outward from the base.

[0014] The electronic device of the seventh invention is characterized in that, in the electronic device of the sixth invention, the housing has an opening corresponding to the outer shape of the base of the holder, and the engaging claw of the holder engages with the opening end.

[0015] The electronic device of the eighth invention comprises an element, a holder for holding the element, and a housing to which the holder is attached, wherein the holder has a base, a holding portion bent inward from the outer circumference of the base, and an engaging claw protruding outward from the outer circumference of the base.

[0016] In this invention, the holder for holding the element has a holding portion that is bent inward from the outer circumference of the base. Therefore, the element is held in the holder by being fitted into the space between the holding portion and the base. The holder also has engaging claws that protrude outward from the outer circumference of the base. Therefore, the holder for holding the element is attached to the housing by the engaging claws. As a result, in this invention, the element can be attached to the electronic device with a simple structure without using screws or the like.

[0017] The electronic device of the ninth invention comprises an element, a holder for holding the element, and a housing to which the holder is attached, wherein the holder is exposed from an opening in the housing, and the housing has tapers extending from the opening toward one and the other in the longitudinal direction of the housing.

[0018] The holder exposed through the opening of the housing becomes the contact surface with the object from which sound is being collected when the element is collecting sound. In this invention, the housing has a taper extending from the opening in one direction and the other in the longitudinal direction of the housing. Therefore, even if the object from which sound is being collected has an uneven surface when using the electronic device, the contact surface can easily be brought into contact with the object.

[0019] The electronic device of the tenth invention is characterized in that, in the electronic device of the first, fifth, eighth, or ninth invention, the holder is elastic.

[0020] An electronic device according to an 11th invention is characterized in that, in the electronic device according to any one of the 1st, 5th, 8th or 9th inventions, the element is a piezo element.

[0021] An electronic device according to a 12th invention is characterized in that, in the electronic device according to any one of the 1st, 5th, 8th or 9th inventions, the element has a substantially circular shape with a predetermined thickness.

[0022] An electronic device according to a 13th invention is characterized in that, in the electronic device according to any one of the 1st, 5th, 8th or 9th inventions, the electronic device is a stethoscope.

[0023] An electronic device according to a 14th invention is characterized in that, in the electronic device according to the 1st invention, the electronic device further comprises a housing having an opening corresponding to the holder, a stopper, and a fastening member, an outer periphery of the holder is in contact with an end portion of the opening, the stopper and the end portion of the opening sandwich the holder, and the fastening member is fastened to the housing via the stopper.

[0024] In the present invention, the housing has an opening corresponding to the holder. The outer periphery of the holder is in contact with the end portion of the opening, the stopper and the end portion of the opening sandwich the holder, and the fastening member is fastened to the housing via the stopper. This eliminates the gap between the holder and the housing in a state where the holder is attached to the housing. [Advantageous Effects of Invention]

[0025] According to the present invention, the element can be attached to the electronic device with a simple structure. [Brief Description of Drawings]

[0026] [Figure 1] It is a perspective view showing the stethoscope according to the embodiment of the present invention. [Figure 2] It is a perspective view showing the stethoscope according to the embodiment of the present invention. [Figure 3] It is a front view showing the stethoscope according to the embodiment of the present invention. [Figure 4] This is a rear view showing a stethoscope according to an embodiment of the present invention. [Figure 5] This is a plan view showing a stethoscope according to an embodiment of the present invention. [Figure 6] This is a bottom view showing a stethoscope according to an embodiment of the present invention. [Figure 7] This is a right side view showing a stethoscope according to an embodiment of the present invention. [Figure 8] This is a left side view showing a stethoscope according to an embodiment of the present invention. [Figure 9] This is a cross-sectional view of the stethoscope in a direction perpendicular to its longitudinal direction. [Figure 10] Figure 9 is an enlarged view of the main part. [Figure 11] This is a perspective view showing the earth plate. [Figure 12] This is a cross-sectional view of the stethoscope in a direction perpendicular to its longitudinal direction. [Figure 13] Figure 12 is an enlarged view of the main part. [Figure 14] This is a perspective view showing a stethoscope with a transparent interior. [Figure 15] This is a schematic diagram showing a piezoelectric element and a circuit board connected by a two-core shielded wire. [Figure 16] This diagram illustrates the difference in sensitivity due to differences in the size of the piezoelectric element. [Figure 17] This is a perspective view showing a conventional stethoscope. [Figure 18] This is a perspective view showing a conventional stethoscope. [Figure 19] This is a cross-sectional view of a modified stethoscope in a direction perpendicular to the longitudinal direction. [Figure 20] This is a perspective view showing the holder. [Figure 21] This is a perspective view showing the stopper. [Modes for carrying out the invention]

[0027] Embodiments of the present invention will be described below. Figures 1 and 2 are perspective views showing a stethoscope 1 (electronic device) according to an embodiment of the present invention. Figure 3 is a front view showing a stethoscope 1 according to an embodiment of the present invention. Figure 4 is a rear view showing a stethoscope 1 according to an embodiment of the present invention. Figure 5 is a top view showing a stethoscope 1 according to an embodiment of the present invention. Figure 6 is a bottom view showing a stethoscope 1 according to an embodiment of the present invention. Figure 7 is a right side view showing a stethoscope 1 according to an embodiment of the present invention. Figure 8 is a left side view showing a stethoscope 1 according to an embodiment of the present invention.

[0028] Stethoscope 1 is used to collect heart sounds, lung sounds, etc. for auscultation. The user of stethoscope 1 holds it with their hand from the flat side and places the bottom side of stethoscope 1 against the object to be auscultated. A piezoelectric element 4 is provided inside stethoscope 1 on its bottom side.

[0029] The stethoscope 1 comprises a housing 2, a holder 3, a piezoelectric element 4, an earth plate 5, etc. The housing 2 (stethoscope 1) is roughly rectangular in plan view, with chamfered corners, and both sides perpendicular to the longitudinal direction of the housing 2 are recessed inward. The housing 2 houses a circuit board 10, etc. The housing 2 is composed of an upper housing 2a and a lower housing 2b. The upper housing 2a and the lower housing 2b are fastened together by four screws 9. The screws 9 are inserted from the bottom side of the lower housing 2b to the upper housing 2a side, fastening the upper housing 2a and the lower housing 2b together. In the lower housing 2b, an opening is provided on the bottom side for the holder 3 to be installed. The holder 3 is exposed from the opening in the housing 2. The housing 2 has a taper from the opening toward one side (front) and the other side (rear) in the longitudinal direction of the housing 2. In other words, the housing 2 is tapered from the opening towards the front and tapered from the opening towards the rear.

[0030] On the flat side of the stethoscope 1, there is a battery meter 6 that indicates the remaining battery level and a level meter 7 that indicates the level of the sound collected. On the back side of the stethoscope 1, there is a USB port 13 and an earphone jack 14.

[0031] Figure 9 is a cross-sectional view of the stethoscope 1 in a direction perpendicular to the longitudinal direction. Figure 10 is an enlarged view of the main part in Figure 9. The holder 3 is for holding the piezoelectric element 4. The holder 3 is made of, for example, elastic rubber. In plan view, the holder 3 is circular. The holder 3 has a base 3a, a holding part 3b, and an engaging claw 3c. The base 3a is a circular part having a predetermined thickness. The holding part 3b is the part that holds the piezoelectric element 4. The holding part 3b is bent inward from the outer circumference. There is a space between the base 3a and the holding part 3b. The piezoelectric element 4 is fitted into the holding part 3b, so the outer circumference of the piezoelectric element 4 is held by the holding part 3b. That is, the holder 3 holds the outer circumference of the piezoelectric element 4 by sandwiching it, with the outer circumference of the piezoelectric element 4 fitted into the space between the base 3a and the holding part 3b. The engaging claws 3c are for engaging the holder 3 with the lower housing 2b (housing 2). The engaging claws 3c engage with the open end of housing 2. The holder 3 is attached to the lower housing 2b by the engaging claws 3c. In plan view, the engaging claws 3b are provided at six equally spaced locations in the circumferential direction on the circular holder 3.

[0032] The piezoelectric element 4 is a flat, roughly disc-shaped element. The piezoelectric element 4 has a predetermined thickness. The piezoelectric element 4 is attached to the holder 3. In this embodiment, the holder 4 is the contact surface that comes into contact with the human body (object). The piezoelectric element 4 converts sound (vibration) from the body into voltage via the holder 3.

[0033] Figure 11 is a perspective view showing the ground plate 5. Figure 12 is a cross-sectional view of the stethoscope 1 in a direction perpendicular to the longitudinal direction. Figure 13 is an enlarged view of the main part in Figure 12. Figure 14 is a perspective view showing the stethoscope 1 in a state where the interior is visible. The ground plate 5 is provided in two places on both sides in a direction perpendicular to the longitudinal direction of the housing 2 (stethoscope 1). The ground plate 5 is provided in recessed parts on both sides perpendicular to the longitudinal direction of the housing 2. The ground plate 5 is exposed to the outside from the housing 2. In plan view, the ground plate 5 is approximately pentagonal in shape. The ground plate 5 has a base 5a and two arms 5b. The protruding part 5b protrudes perpendicularly from the extending direction of the base 5a. Screw holes 5c are provided at the tips of the arms 5b. The arms 5b extend approximately parallel to the direction in which the substrate 10 extends. That is, the arms 5b and the substrate 10 are in an approximately parallel relationship. The earth plate 5 is fixed to the base plate 10 by screws 11 inserted through screw holes 5c. In other words, the arm 5b and the base plate 10, which are in a substantially parallel relationship, are fastened together by screws 11 (fastening members) that extend in a direction perpendicular to the arm 5b and the base plate 10.

[0034] Furthermore, the piezoelectric element 4 is connected to the earth (ground) on the substrate 10 by a two-core shielded wire, as schematically shown in Figure 15.

[0035] The circuit board 10 is equipped with a circuit including an amplifier for amplifying the sound collected by the piezoelectric element 4.

[0036] Figure 16 illustrates the difference in sensitivity due to differences in the size of the piezoelectric element. (a) shows the level of a 41 mm diameter piezoelectric element, and (b) shows the level of a 27 mm diameter piezoelectric element. Here, a weight is placed on top of the piezoelectric element placed on the ground, and the vibration of the ground is measured by the piezoelectric element. As shown in the figure, the level of the 41 mm diameter piezoelectric element is higher than that of the 27 mm diameter piezoelectric element. From this, it can be seen that larger diameter piezoelectric elements have higher sensitivity than smaller ones.

[0037] Conventionally, as shown in Figure 17, the piezoelectric element 102 was mechanically fixed to the holder 103 by a screw 104, requiring space for the screw 104 on the outer circumference of the piezoelectric element 102. Furthermore, the use of the screw 104 created irregularities around the piezoelectric element 102, as did the cover enclosing the piezoelectric element 102. Additionally, fixing with a screw 104 required controlling the tightening strength of the screw 104, making assembly management difficult.

[0038] As described above, the holder 3 has a holding portion 3b that bends inward from the outer circumference of the base 3a. The outer circumference of the piezoelectric element 4 is held by this holding portion 3b, and the bottom surface of the piezoelectric element 4 is covered by the holder 3, preventing it from falling off the stethoscope 1. In this embodiment, no screws are used to attach the piezoelectric element 4 to the holder 3, eliminating the need for this space and thus saving space. This allows the use of a highly sensitive, large-diameter piezoelectric element. Furthermore, because there are no irregularities around the piezoelectric element 4, there are no irregularities on the surface of the holder 3 that covers the piezoelectric element 4, allowing for good sound collection when the stethoscope 1 is brought into contact with the body being auscultated. In addition, since no screws are used, there is no need to control the tightening strength of screws, improving ease of assembly.

[0039] Furthermore, the holder 3 has an engaging claw 3c that protrudes from the outer circumference of the base 3a. This engaging claw 3c engages with the open end of the housing 2 (lower housing 2b), thereby attaching the piezoelectric element 4 held in the holder 3 to the housing 2 (lower housing 2b). In addition, for sound collection, it is important for the piezoelectric element 4 (holder 3) to be in contact with the body being auscultated. Due to the space-saving design, the holder 3 (piezoelectric element 4) can be easily conformed to the contours of the body being auscultated, and can be made to fit snugly against the body. In addition, since no screws are used to attach the holder 3 to the housing 2, the number of parts is reduced, improving the ease of assembly of the stethoscope 1.

[0040] Conventionally, as shown in Figure 18, the stethoscope 201 had an earth plate 203 that was exposed from the housing 202. The wiring to the earth plate was connected by soldering the wires to the inside of a sheet metal component and then connecting the wires to an internal circuit board. With this structure, when assembling the stethoscope, the wires may break or get pinched, which can impair the ease of assembly. In addition, the use of sheet metal limits the design options.

[0041] In this embodiment, the ground plate 5 is in direct contact with the substrate 10 by the arm 5b and is securely fixed to the substrate 10 by the screw 11, thus ensuring reliable grounding. Furthermore, since the ground plate 5 is provided on both sides of the housing 2 in a direction perpendicular to the longitudinal direction and in the recessed portions on the inside, the user's hand naturally comes into contact with the ground plate 5 when using the stethoscope 1, ensuring reliable grounding. In addition, the recessed portion is easy for the user to hold.

[0042] Furthermore, conventional wiring of piezoelectric elements required careful consideration of the wiring path, as it could easily pick up noise due to its loop-like shape, similar to an antenna. Additionally, because the wiring has high impedance, exposed wiring could lead to superimposed noise due to electrical coupling.

[0043] In this embodiment, the piezoelectric element 4 is connected to the earth (ground) on the substrate 10 by a two-core shielded wire. This prevents the intrusion of external noise.

[0044] As described above, in this embodiment, the piezoelectric element 4 is held by being sandwiched between the holder 3. This allows the piezoelectric element 4 to be attached to the stethoscope 1 with a simple structure without the need for screws or the like.

[0045] Furthermore, in this embodiment, the holder 3 that holds the piezoelectric element 4 has an engaging claw 3c that engages with the housing 2. As a result, the holder 3 that holds the piezoelectric element 4 is attached to the housing 2 of the stethoscope 1 by the engaging claw 3c, and the piezoelectric element 4 can be attached to the stethoscope 1 with a simple structure without using screws or the like.

[0046] Furthermore, in this embodiment, the holder 3 that holds the piezoelectric element 4 has a holding portion 3b that is bent inward from the outer circumference of the base 3a. Therefore, the piezoelectric element 4 is held in the holder 3 by being fitted into the space between the holding portion 3b and the base 3a. The holder 3 also has an engaging claw 3c that protrudes outward from the outer circumference of the base 3a. Therefore, the holder 3 that holds the piezoelectric element 4 is attached to the housing 2 by the engaging claw 3c. As a result, in this embodiment, the piezoelectric element 4 can be attached to the stethoscope 1 with a simple structure without using screws or the like.

[0047] The holder 3, exposed through the opening of the housing, becomes the contact surface with the object from which sound is being collected by the piezoelectric element 4. In this embodiment, the housing 2 has a taper extending from the opening to one side (front) and the other side (rear) in the longitudinal direction of the housing 2. Therefore, when using the stethoscope 1, even if the object from which sound is being collected has irregularities, the contact surface can easily be brought into contact with the object.

[0048] Furthermore, in this embodiment, the circuit board 10 and the ground plate 5 are fastened together by screws 11. Unlike the conventional invention, the circuit board and the ground plate are not connected by wiring, so grounding can be achieved with a simple structure, and the intrusion of hum noise can be prevented. Note that "ground plate" refers to a plate for "grounding," but the concept also includes "ground (GND) plate" for "ground (GND)."

[0049] Furthermore, in this embodiment, both sides perpendicular to the longitudinal direction of the housing are recessed inward. This makes it easier for users of the electronic device to grasp and use the recessed parts of the side walls.

[0050] Because piezoelectric elements have high impedance, they are prone to hum noise interference. In this embodiment, the stethoscope 1 is equipped with a piezoelectric element 4, but the ground plate 5 can prevent hum noise interference.

[0051] Because amplifiers have high impedance, they are prone to hum noise. In this embodiment, the stethoscope 1 is equipped with an amplifier, but the ground plate 5 can prevent hum noise from being introduced.

[0052] Furthermore, in this embodiment, the ground on the circuit board and the piezoelectric element are connected by a two-core shielded wire. This prevents the intrusion of hum noise.

[0053] The modified stethoscope will now be described. Figure 19 is a cross-sectional view of the modified stethoscope 301 in a direction perpendicular to its longitudinal direction. The modified stethoscope 301, like stethoscope 1, is equipped with a holder 303, but the form of the holder 303 differs from that of the holder 3 of stethoscope 1. Components similar to those of stethoscope 1 are denoted by the same reference numerals, and their descriptions for stethoscope 301 are omitted.

[0054] Figure 20 is a perspective view showing the holder 303. The holder 303 is for holding the piezoelectric element 4. The holder 303 is made of, for example, elastic rubber. In plan view, the holder 303 is circular. The holder 303 has a base 303a and a holding portion 303b. However, unlike the holder 3, the holder 303 does not have engaging claws. The base 303a is a circular portion having a predetermined thickness. The holding portion 303b is the portion that holds the piezoelectric element 4. The holding portion 303b is bent inward from the outer circumference. There is a space between the base 303a and the holding portion 303b. The piezoelectric element 4 is fitted into the holding portion 303b, and the outer circumference of the piezoelectric element 4 is held by the holding portion 303b. In other words, the holder 303 holds the piezoelectric element 4 by sandwiching its outer circumference, with the outer circumference of the piezoelectric element 4 fitted into the space between the base 303a and the holding portion 303b. In the holder 303, the holding portion 303b is provided with slits 303d at predetermined equal intervals. These slits 303d make it easier to assemble the piezoelectric element 4 into the holder 303. They also make it easier to release the rubber mold.

[0055] In stethoscope 1, the holder 3 was attached to the housing 2 (lower housing 2b) by an engaging claw 3c, but in stethoscope 303, the holder 303 is attached to the housing 2 (lower housing 2b) by a stopper 306 and a screw 307 (fastening member).

[0056] Figure 21 is a perspective view showing the stopper 306. The stopper 306 has a roughly annular base 306a and a roughly plus-shaped base 306b. The stopper 306 is made of, for example, stainless steel. However, the stopper 306 may be made of other materials. The base 306a has four screw holes 306c at 90-degree intervals on the extension of the base 306b. A limiting plate 306d is provided approximately in the center of the base 306b.

[0057] When the holder 303 that holds the piezoelectric element 4 is attached to the lower housing 2b (housing 2), first, the holder 303 is placed on the lower housing 2b so that its outer circumference abuts against the opening end of the lower housing 2b. Next, the stopper 306 is placed on the piezoelectric element 4 with the limitation plate 306d facing the piezoelectric element 4, sandwiching the piezoelectric element 4 between the opening of the lower housing 2b. Then, the screw 307 is inserted from the inside of the housing 2 through the screw hole 306c of the stopper 306 and screwed to the lower housing 2b. In this way, the holder 303 is attached to the lower housing 2b by being sandwiched between the stopper 306 and the lower housing 2b.

[0058] As mentioned above, the stopper 306 is provided with a limitation plate 306d. A predetermined gap is provided between the piezoelectric element 4 and the limitation plate 306d. The limitation plate 306 is provided to prevent deformation when a large load is applied to the piezoelectric element 4, but it is not required to be provided.

[0059] In the modified example, the housing 2 (lower housing 2b) has an opening corresponding to the holder 303. The outer circumference of the holder 303 abuts against the end of the opening, and the stopper 306 and the end of the opening sandwich the holder 303, with the screw 307 (fastening member) fastened to the housing 2 (lower housing 2b) via the stopper 306. This eliminates the gap between the holder 303 and the housing 2 when the holder 303 is attached to the housing 2.

[0060] Although embodiments of the present invention have been described above, the applicable forms of the present invention are not limited to those described above, and modifications can be made as appropriate without departing from the spirit of the invention. [Industrial applicability]

[0061] This invention can be suitably adopted in electronic devices. [Explanation of Symbols]

[0062] 1.301 Stethoscope (electronic device) 2 cabinets 2a Upper enclosure 2b Lower enclosure 3,303 holder 3a, 303a base 3b, 303b holding part 3c Engagement claw 303d Slit 4 Piezo elements 5. Earth Plate 5a Base 5b Arm 5c screw hole 306 Stopper 306a, 306b base 306c screw hole 306d Limitation Plate 307 Screw (fastening component) 10 substrate 11. Screws (fastening components)

Claims

1. Element and, A holder that holds the element by sandwiching it from the outer circumference of the element, An electronic device characterized by having the following features.

2. The aforementioned holder is The electronic device according to claim 1, characterized by having a base and a holding portion that is bent inward from the outer circumference of the base.

3. The electronic device according to claim 2, characterized in that the holder holds the outer circumference of the element by sandwiching it, with the outer circumference of the element fitted into the space between the base and the holding portion.

4. The electronic device according to claim 2, characterized in that the base of the holder becomes a contact surface with the object from which sound is collected when sound is collected by the element.

5. Element and, The system comprises a holder for holding the element, The holder is an electronic device characterized by having engaging claws that engage with the housing.

6. The aforementioned holder is The electronic device according to claim 5, characterized by having a base and the engaging claws protruding outward from the base.

7. The housing has an opening that corresponds to the outer shape of the base of the holder, The electronic device according to claim 6, characterized in that the engaging claw of the holder engages with the open end.

8. Element and, A holder for holding the element, The housing to which the holder is attached comprises, The aforementioned holder is An electronic device characterized by having a base, a holding portion bent inward from the outer circumference of the base, and an engaging claw protruding outward from the outer circumference of the base.

9. Element and, A holder for holding the element, The housing to which the holder is attached comprises, The holder is exposed from the opening of the housing, The electronic device is characterized in that the housing has tapers extending from the opening toward one and the other in the longitudinal direction of the housing.

10. The electronic device according to claim 1, 5, 8, or 9, characterized in that the holder is elastic.

11. The electronic device according to claim 1, 5, 8, or 9, characterized in that the element is a piezoelectric element.

12. The electronic device according to claim 1, 5, 8, or 9, characterized in that the element has a substantially circular shape with a predetermined thickness.

13. The electronic device according to claim 1, 5, 8, or 9, characterized in that the electronic device is a stethoscope.

14. A housing having an opening corresponding to the holder, Stopper and The fastening member is further provided, The electronic device according to claim 1, characterized in that the outer circumference of the holder abuts against the end of the opening, the fastening member is fastened to the housing via the stopper, with the stopper and the end of the opening sandwiching the holder.

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