JP7089651B2 - Vibration detector and holder - Google Patents

Description

The present invention relates to a vibration detection device and a holding unit.

In Patent Document 1, as shown in FIG. 1 and the like, a sound collecting unit, a sound emitting unit, and a sound collecting unit and a sound emitting unit are connected, and an audio signal is supplied from the sound collecting unit to the sound emitting unit. A sound collecting device with a cable is disclosed. The sound collecting unit has a microphone arranged on the microphone surface, and collects sound (vibration) from the sound collecting target with the microphone surface directed toward the sound collecting target.

Japanese Unexamined Patent Publication No. 2009-188617

The above-mentioned sound collecting device collects the sound (vibration) from the sound collecting target with the microphone surface facing the sound collecting target so as not to collect the sound other than the sound from the sound collecting target at the time of collecting the sound. Make a sound.
However, in the above-mentioned sound collecting device, if the cable vibrates for some reason during sound picking, the vibration of the cable is transmitted to the sound picking section, and there is a possibility that the sound is picked up by the sound picking section.

One example of the problem to be solved by the present invention is to reduce the amount of vibration generated by the cable in the vibration sensor.

The invention according to claim 1 is
Vibration sensor and
A signal receiving unit that receives the detection signal of the vibration sensor,
A cable that is connected to the vibration sensor on one end side, connected to the signal receiving unit on the other end side, and transmits the detection signal to the signal receiving unit.
A holding portion attached to the cable or the housing of the vibration sensor, integrally formed with the cable or the housing, and holding the cable in a bent shape at at least one position of the cable.
It is a vibration detection device.

The above-mentioned objectives and other objectives, features and advantages are further clarified by the preferred embodiments described below and the accompanying drawings below.

It is a schematic diagram of the vibration detection apparatus of 1st Embodiment. It is a perspective view of the holding part provided with the vibration detection apparatus of 1st Embodiment. It is a top view of the holding part provided with the vibration detection apparatus of 1st Embodiment. It is a graph which compared the measurement result of the vibration sound of a cable by the vibration detection apparatus of 1st Embodiment, and the measurement result of 1st comparison embodiment. It is a graph which compared the measurement result of the vibration sound of a cable by the vibration detection apparatus of 1st Embodiment, the measurement result of 1st comparison form, and the measurement result of 2nd comparison form. It is a top view of the holding part provided with the vibration detection apparatus of 2nd Embodiment. It is a graph which compared the measurement result of the vibration sound of a cable by the vibration detection apparatus of 2nd Embodiment, and the measurement result of 1st comparison embodiment. It is a top view of the holding part provided with the vibration detection apparatus of 3rd Embodiment. It is a graph which compared the measurement result of the vibration sound of a cable by the vibration detection apparatus of 3rd Embodiment, and the measurement result of 1st comparison embodiment. It is a top view of the 1st sample (the number of times of bending 1 times) of the test of 1st Example (the test of the relationship between the number of times of bending and the vibration sound). It is a top view of the 2nd sample (the number of times of bending 2 times) of the test of 1st Example (the test of the relationship between the number of times of bending and the vibration sound). It is a top view of the 3rd sample (the number of times of bending 3 times) of the test of 1st Example (the test of the relationship between the number of times of bending and the vibration sound). It is a graph which compared the measurement result of the vibration sound of a cable by the vibration detection device of 1st Example, and the measurement result of a comparative example. It is a graph showing the result of the test of the second example (the test of the relationship between the bending angle and the vibration sound), the measurement result of the vibration sound of the cable by the vibration detection device of the second example, and the measurement of the comparative example. It is a graph comparing with the result. It is a top view of the holding part provided with the vibration detection device of the 1st modification. It is a top view of the holding part provided in the vibration detection device of the 2nd modification.

≪Overview≫
Hereinafter, the first to third embodiments, the first and second embodiments, which are examples of the present invention, and a plurality of modifications will be described with reference to the drawings. In all the drawings to be referred to, components having the same function are designated by the same reference numerals, and the description thereof will be omitted as appropriate in the specification.

<< First Embodiment >>
Hereinafter, the first embodiment will be described with reference to the drawings. First, the functions and configurations of the vibration detection device 10 (see FIG. 1) of the present embodiment will be described. Next, the vibration detection operation of the vibration detection device 10 of the present embodiment will be described. Next, the effect of this embodiment will be described.

<Functions and Configuration of Vibration Detection Device of First Embodiment>
FIG. 1 is a schematic view of the vibration detection device 10 of the present embodiment. The vibration detection device 10 has a function of detecting a vibration sound. As an example, the vibration detection device 10 of the present embodiment includes a vibration sensor 20, a signal receiving unit 30, a cable 40, and a holding unit 50. The vibration sound detected by the vibration detection device 10 is, for example, a biological sound of a living body (not shown). The vibration detection device 10 detects a biological sound (breathing sound or heartbeat as an example) with a vibration sensor 20 attached to the chest of the living body, and receives a signal receiving unit of the breathing sound detected by the vibration sensor 20 via the cable 40. It is designed to transmit to 30. That is, the vibration detection device 10 is, for example, a device for acquiring a biological sound (biological sound acquisition device).

[Vibration sensor]
The vibration sensor 20 is attached to a living body and has a function of detecting a living body sound. Further, the vibration sensor 20 has a function of converting the detected biological sound into a detection signal. The vibration sensor 20 is, for example, a capacitance type sensor.
The vibration sensor 20 has a vibration detection unit (not shown), a connection unit (not shown), and a housing 22.
The vibration detection unit has a columnar shape as an example, and detects a biological sound and converts it into a detection signal. The connection portion is a rod-shaped member, one end of which is connected to a connection terminal (not shown) on the outer periphery of the vibration detection portion, and the other end of which is connected to the cable 40.
As shown in FIG. 1, the housing 22 has a hat-shaped main body portion 22A and a protruding portion 22B protruding radially from the main body portion 22A. The main body 22A is formed with a recess (not shown) that opens on the flange 22A1 side of the main body 22A. The protruding portion 22B is formed with a through hole (not shown) along the protruding direction. The housing 22 accommodates the vibration detection portion in the recess of the main body portion 22A, and accommodates the connection portion in the through hole of the protrusion 22B. The vibration sensor 20 is attached to the living body by bringing the back surface of the collar 22A1 (a plane formed on the side opposite to the protruding portion 22B side of the collar 22A1) into contact with the living body.

[Signal receiver]
The signal receiving unit 30 has a function of receiving the detection signal converted by the vibration sensor 20. Further, the signal receiving unit 30 has a function of generating electric power for operating the vibration sensor 20. The signal receiving unit 30 includes an amplifier (not shown), a converter (not shown), and a power supply (not shown). The amplifier has a function of amplifying the detection signal received via the cable 40. The converter has a function of converting the amplified signal amplified by the amplifier into data that can be analyzed by the application software of an external device (PC as an example). The power supply has a function of generating electric power for operating the vibration sensor 20.

〔cable〕
The cable 40 has a function of transmitting the detection signal converted by the vibration sensor 20 from the vibration sensor 20 to the signal receiving unit 30. Further, the cable 40 has a function of supplying the electric power generated by the power source of the signal receiving unit 30 to the vibration detection unit of the vibration sensor 20.
As shown in FIG. 1, the cable 40 is connected to the connection terminal of the vibration sensor 20 on one end side and to the signal receiving unit 30 on the other end side. The cable 40 is a flexible member having a plurality of conductors (not shown) and an insulating tube 42 that covers the plurality of conductors.

[Holding part]
As shown in FIG. 1, the holding portion 50 is attached to the cable 40 and has a function of holding the cable 40 in a state where a bent shape is formed at at least one position of the cable 40. As an example, the holding portion 50 of the present embodiment holds the cable 40 in a state where bent shapes are formed at four (plural) locations of the cable 40. In other words, the holding portion 50 of the present embodiment holds the cable 40 in a state where the cable 40 is formed with the portions BP1, BP2, BP3, and BP4 bent at four places (multiple places). There is.
In addition, the "bending shape" in the present specification means that two linear portions intersect with each other, such as the shape of a bent portion (in FIG. 1, the bent portions BP1, BP2, BP3, BP4). It means the shape of a portion having a curvature connected so as to have an arrangement relationship, or the shape of a portion having an equivalent radius of curvature.

FIG. 2A is a perspective view of the holding portion 50, and FIG. 2B is a plan view of the holding portion 50. The holding portion 50 has a base 52 (an example of a plate-shaped body) and a fitting groove 54 (an example of a groove portion). As an example, the holding portion 50 is a rubber member in which the base 52 and the fitting groove 54 are integrally formed. That is, the holding portion 50 is an integral piece made of rubber. Specifically, the rubber of the present embodiment is, as an example, silicon rubber. Although a part of the cable 40 in FIG. 1 is omitted, the holding portion 50 is attached to the cable 40 at one end side (vibration sensor 20 side) of the cable 40 in the length direction as an example. It is attached.

When viewed from the plate thickness direction, the base 52 has a rectangular shape in which four corners are chamfered, and has a width X of 50 mm and a height Y of 50 mm.
The fitting groove 54 is provided so as to project from one surface of the base 52, and is used as a groove for fitting a cable 40 composed of two walls facing each other. As an example, the fitting groove 54 extends from one end to the other end of the base 52 in the lateral width direction. The fitting groove 54 has four curved portions CP1, CP2, CP3, CP4 and five linear portions LP1, LP2, LP3, LP4, and LP5. The partial LP1, the partial CP1, the partial LP2, the partial CP2, the partial LP3, the partial CP3, the partial LP4, the partial CP4 and the partial LP5 are connected from one end to the other end in the width direction of the base 52 in the order described thereof. ..

Here, the linear portion LP2 is arranged along a direction different from the linear portion LP1 by about 135 °. That is, the curved portion CP1 connecting the linear portion LP1 and the linear portion LP2 is a bent portion such that the linear portion LP2 intersects and connects the linear portion LP1 at about 135 °. It has become. The bent portion CP2 is a bent portion such that the linear portion LP3 intersects and connects with the linear portion LP2 at about 165 ° (in the direction opposite to the bending direction of the bent portion CP1). There is. The bent portion CP3 is a bent portion such that the linear portion LP4 intersects and connects the linear portion LP3 at about 165 ° (in the same direction as the bending direction of the bent portion CP1) with respect to the linear portion LP3. There is. The bent portion CP4 is a bent portion such that the linear portion LP5 intersects and connects with the linear portion LP4 at about 135 ° (in the direction opposite to the bending direction of the bent portion CP1). There is. The linear portion LP1 and the linear portion LP5 have a relationship that is substantially parallel to each other (so that the crossing direction of the other is within ± 5 ° with respect to one). Further, the bent portions CP2 and CP4 have a shape bent in the opposite direction to the bent portion CP1.

With the above configuration, the holding portion 50 fits a part of the cable 40 into the fitting groove 54, and the bent portions CP1, CP2, CP3, and CP4 are bent into the cable 40, respectively, and the portions BP1, BP2, and BP3 are bent. , BP4 is formed. Along with this, the bent portions BP1, BP2, BP3, and BP4 of the cable 40 held in the holding portion 50 are each about 135 °, and about 165 ° in the direction opposite to the bending direction of the bent portion BP1. , About 165 °, the bent portion BP1 can be bent at about 135 ° in the direction opposite to the bending direction. That is, the bent shapes of at least two of the bent portions BP1, BP2, BP3, and BP4 at the plurality of positions are formed to be bent in opposite directions to each other. Further, the bending angle of the bending shape of the bent portions BP1, BP2, BP3, and BP4 at a plurality of locations is set to 45 ° or more and 180 ° or less.

The above is a description of the functions and configurations of the vibration detection device 10 of the present embodiment.

<Vibration detection operation of the first embodiment>
Next, the vibration detection operation by the vibration detection device 10 of the present embodiment will be described with reference to the drawings.
First, the measurer brings the plurality of vibration sensors 20 into contact with the neck, chest, and the like of the living body of the subject lying on his back on the bed (not shown). Further, the measurer arranges the holding portion 50 attached to the cable 40 on the abdomen of the living body. In this case, the holding portion 50 is arranged so as to come into contact with the abdomen of the living body on the back surface of the base 52 (the surface opposite to the surface on which the fitting groove 54 is formed).
The measurer then covers the subject with sheets (not shown) on the abdomen.
Next, the measurer activates the signal receiving unit 30 and the external device connected to the signal receiving unit 30, and starts the operation of detecting the biological sound of the subject. Along with this, the power supply of the signal receiving unit 30 generates electric power for operating the vibration sensor 20, and the generated electric power is supplied to the vibration detection unit of the vibration sensor 20 via the cable 30. In addition, the vibration detection unit converts the detected biological sound (respiratory sound) into a sequential detection signal. The converted detection signal is transmitted to the amplifier of the signal receiving unit 30 via the cable 30. The amplifier amplifies the received detection signal and converts it into data that can be analyzed by the application software. The converted data is transmitted to an external device connected to the signal receiving unit 30 and analyzed by the application software.
Then, when the predetermined detection operation time elapses, the external device notifies the measurer that the biological sound detection operation is completed by the application software, and the vibration detection operation by the vibration detection device 10 of the present embodiment is completed. do.
The analysis result of the biological sound analyzed by the application software is output as the relationship of the acceleration (dB) with respect to the frequency (Hz) (see FIG. 3). Here, the acceleration (dB) is a physical quantity corresponding to the sound pressure. That is, the larger the acceleration (dB) value, the larger the sound pressure value.

The above is a description of the vibration detection operation of the vibration detection device 10 of the present embodiment.

<Effect of the first embodiment>
Next, the effects of the present embodiment (first to fifth effects) will be described with reference to the drawings. Hereinafter, this embodiment will be described in comparison with each comparative embodiment (not shown) described later. When the same components as those of the first embodiment are used among the components of each comparison form described later, each comparison form will be described using the same names, reference numerals, and the like as the components of the first embodiment.

[First effect]
FIG. 3 is a graph comparing the measurement result of the vibration sound of the cable 40 by the vibration detection device 10 of the present embodiment and the measurement result of the first comparative embodiment described later. Here, the vibration detection device of the first comparative embodiment is different from the vibration detection device 10 of the present embodiment only in that the holding unit 50 is not provided. In the test based on this graph, the vibration sensor 20 was measured by rubbing (vibrating) a part of the cable 40 without attaching the vibration sensor 20 to the chest of the living body.
In the case of the first comparative mode, the acceleration (dB) is large with respect to the reference background noise, especially at a frequency of 60 (Hz) or higher. That is, the difference between the spectrum of the first comparative form and the spectrum of background noise in the graph of FIG. 3 can be said to be the detected amount of vibration generated by the cable 40.
On the other hand, in the case of the present embodiment, the acceleration (dB) is almost the same at all the measured frequencies with respect to the background noise as a whole. In the case of this embodiment, the vibration applied to the cable 40 is a portion between the holding portion 50 and the signal receiving portion 30 in the cable 40.
In the case of the present embodiment, it is considered that the vibration generated in the cable 40 is absorbed by the bent portions BP1, BP2, BP3, and BP4 of the cable 40.
Therefore, the vibration detection device 10 of the present embodiment includes a holding portion 50 that holds the cable 40 in a state where a bent shape is formed at at least one position of the cable 40, so that the cable 40 in the vibration sensor 20 can be used. The amount of detected vibration can be reduced. Further, the holding portion 50 of the present embodiment is generated in the cable 40 by forming the bent portions BP1, BP2, BP3, and BP4 in the bent portions CP1, CP2, CP3, and CP4, respectively. It can absorb vibrations.

[Second effect]
As described in the explanation of the first effect, a part or all of the vibration generated on one side of the holding portion 50 in the cable 40 is absorbed by the holding portion 50 and is not propagated to the other side. In the present embodiment in which the holding portion 50 is attached to the cable 40 at one end side (vibration sensor 20 side) of the center of the cable 40 in the length direction, the holding portion 50 is located at the center or the center of the cable 40 in the length direction. The distance between the holding portion 50 and the vibration sensor 20 in the cable 40 is shorter than that in the comparative form attached to the cable 40 on the other end side (signal receiving portion 30 side) (see FIG. 1). For example, in the case of an example of the present embodiment in which the holding portion 50 is attached to the cable 40 at a position shifted by 20 cm from the center in the length direction of the cable 40 to one end side (vibration sensor 20 side), it is compared with the above comparative embodiment. Therefore, the distance between the holding portion 50 and the vibration sensor 20 in the cable 40 is as short as at least 20 cm.
Therefore, the vibration detection device 10 of the present embodiment is more difficult to detect the vibration generated by the cable 40 than the above comparative embodiment.
This effect is more preferable when the mounting position of the holding portion 50 on the cable 40 is closer to the vibration sensor 20 in the length direction of the cable 40. Therefore, the holding portion 50 may be attached to the end portion of the cable 40 on the vibration sensor 20 side, or the holding portion 50 may be integrally configured with the housing 22 of the vibration sensor 20.
In addition, in explaining this effect, the said comparative form which was made into a comparison target includes the holding part 50 which exerts the first effect. Therefore, it can be said that the above comparative form belongs to the technical scope of the present invention.

[Third effect]
Further, the holding portion 50 of the present embodiment has a shape in which at least two of the bent portions CP1, CP2, CP3, and CP4 are bent in opposite directions to each other (FIGS. 2A and 2A). See 2B). Therefore, at least two of the bent portions BP1, BP2, BP3, and BP4 of the cable 40 of the present embodiment are bent in opposite directions (see FIG. 1). Specifically, the bent portions BP2 and BP4 are bent in the opposite direction with respect to the portions BP1 and BP3 bent in the same direction. As a result, one end and the other end of the portion of the cable 40 held by the holding portion 50 face in substantially opposite directions to each other (see FIG. 1).
Therefore, according to the present embodiment, the vibration sensor 20 is arranged on the opposite side of the signal receiving portion 30 with the holding portion 50 sandwiched between the holding portions 50 without bending the portion other than the portion held by the holding portion 50 of the cable 40. easy.

[Fourth effect]
The holding portion 50 of the present embodiment has a base 52 and a fitting groove 54 provided on one surface side of the base 52. Then, when detecting the biological sound of the subject, the holding portion 50 is arranged in a state where the back surface of the base 52 is in contact with, for example, the abdomen.
Therefore, the holding portion 50 of the present embodiment can be stably arranged easily during the vibration detection operation.

[Fifth effect]
FIG. 4 is a graph comparing the measurement result of the vibration sound of the cable 40 by the vibration detection device 10 of the present embodiment, the measurement result of the first comparative form, and the measurement result of the second comparative form described later. Here, the vibration detection device (not shown) of the second comparative embodiment is different from the vibration detection device 10 of the present embodiment only in that the holding portion 50 is made of a hard resin (plastic). The method of the test based on this graph is the same as that of the graph of FIG.
In the case of the second comparative form, the acceleration (dB) was smaller at all the measured frequencies than in the case of the first comparative form. On the other hand, in the case of the present embodiment, the acceleration (dB) is smaller at all the measured frequencies than in the second comparative embodiment. That is, in the case of the present embodiment, the vibration generated in the cable 40 is more easily absorbed by the holding portion 50 than in the case of the second comparative embodiment.
The reason for this is that the holding portion 50 of the present embodiment is made of rubber and the holding portion 50 of the second comparative embodiment is made of a hard resin. Therefore, the holding portion 50 of the present embodiment is the holding portion of the second comparative embodiment. It is considered that this is because it is easier to absorb vibration than 50.
Therefore, the holding portion 50 of the present embodiment made of rubber is more likely to absorb the vibration generated in the cable 40 than the holding portion 50 which is a hard member such as a hard resin. Along with this, the vibration detection device 10 of the present embodiment can reduce the amount of vibration detected by the cable 40 in the vibration sensor 20.
In explaining this effect, the second comparative form as the comparative form has a cable 40 as compared with the first comparative form used as the comparative form in the explanation of the first effect, as shown in the graph of FIG. The amount of vibration generated in is small. Therefore, since the second comparative form is a form that exhibits the first effect, it can be said that the second comparative form belongs to the technical scope of the present invention.
Further, the holding portion 50 of the present embodiment is compared with the second comparative embodiment when the base 52 is arranged in a state where the back surface of the base 52 is in contact with the abdomen when detecting the biological sound of the subject. Therefore, it can be said that it is also effective in that it is easy to secure contact stability.

The above is the description of the effect of this embodiment. Further, the above is the description of the first embodiment.

<< Second Embodiment >>
Next, the second embodiment will be described with reference to FIG. Hereinafter, when the same components as those of the first embodiment are used among the components of the present embodiment described later, the present embodiment will be described using the same names, codes, and the like as the components of the first embodiment.

<Functions and configurations of the vibration detection device of the second embodiment and vibration detection operation>
In the vibration detection device (not shown) of the present embodiment, the holding portion 50A is a saw blade-shaped wire 54A and a tape (not shown) for fixing the wire 54A to the cable 40.
The saw blade-shaped wire 54A has four curved portions CP1, CP2, CP3, CP4 and five linear portions LP1, LP2, LP3, LP4, and LP5. Partial LP1, Partial CP1, Partial LP2, Partial CP2, Partial LP3, Partial CP3, Partial LP4, Partial CP4 and Partial LP5 are connected in the order described above. Here, the bending angle of the partial CP1 and the partial CP3 is set to about 90 °, and the bending angle of the partial CP2 and the partial CP4 is set to about 90 ° in the direction opposite to the bending angle of the partial CP1.
With the above configuration, when the wire 54A is taped to a part of the cable 40 with a part of the cable 40 along the saw blade-shaped wire 54A, the bent part CP1 is attached to the part of the cable 40. , CP2, CP3, CP4, the bent portions BP1, BP2, BP3, BP4 are formed.
The above is a difference from the first embodiment of the present embodiment. Further, the vibration detection operation of this embodiment is the same as that of the first embodiment.

<Effect of the second embodiment>
Next, the effect of this embodiment will be described with reference to FIG. The graph of FIG. 6 is a graph comparing the measurement result of the vibration sound of the cable 40 by the vibration detection device of the present embodiment and the measurement result of the first comparative embodiment. The method of the test based on this graph is the same as that of the graph of FIG.
In the case of the present embodiment, the acceleration (dB) is smaller at all the measured frequencies than in the case of the first comparative embodiment. That is, the holding portion 50A of the present embodiment exerts the first effect of the first embodiment. Further, it can be said that the present embodiment exhibits the second effect and the third effect of the first embodiment.
In the case of this embodiment, the wire 54A constituting the holding portion 50A is deformable. Therefore, in the case of the present embodiment, the bending angles of the bent portions CP1, CP2, CP3, and CP4 can be easily changed by deforming the wire 54A. In this respect, the holding portion 50A of the present embodiment is superior to the holding portion 50 of the first embodiment.

The above is the description of the effect of this embodiment. Further, the above is the description of the second embodiment.

<< Third Embodiment >>
Next, the third embodiment will be described with reference to FIG. 7. Hereinafter, when the same components as those of the first embodiment are used among the components of the present embodiment described later, the present embodiment will be described using the same names, codes, and the like as the components of the first embodiment.

<Functions and configurations of the vibration detection device of the third embodiment and vibration detection operation>
The vibration detection device (not shown) of the present embodiment has a portion CP1, CP2, CP3, CP4, CP5, CP6 bent in a part of the insulating tube 42B constituting the cable 40B, and a linear portion LP1, LP2, LP3. And are formed. Part CP1, Part CP2, Part LP1, Part CP3, Part LP2, Part CP4, Part LP3, Part CP5, Part CP6 are connected in the order described above. Here, in the present embodiment, the combination of the partial CP1, the partial CP2, the partial LP1, the partial CP3, the partial LP2, the partial CP4, the partial LP3, the partial CP5, and the partial CP6 is referred to as the holding portion 50B. Further, in the present embodiment, a plurality of conductors covered with the insulating tube 42B of the cable 40B are taken as an example of the cable.
Here, the bending angle of the partial CP1 is about 47 °, and the bending angle of the partial CP6 is about 47 ° in the direction opposite to the bending angle of the partial CP1. The bending angle of the partial CP2 is about 135 °, and the bending angle of the partial CP5 is about 135 ° in the direction opposite to the bending angle of the partial CP2. The bending angle of the partial CP3 is about 165 °, and the bending angle of the partial CP4 is about 165 ° in the direction opposite to the bending angle of the partial CP3.
With the above configuration, the plurality of conductors covered with the holding portion 50B have bent portions corresponding to the bent portions CP1, CP2, CP3, CP4, CP5, and CP6, respectively. ing.
The above is a difference from the first embodiment of the present embodiment. Further, the vibration detection operation of this embodiment is the same as that of the first embodiment.

In the above description, the holding portion 50B is assumed to be a separate member from the plurality of conducting wires which are examples of the cable. However, the holding portion 50B is not limited to a separate member, and may be integrally formed with the cable 40B.

<Effect of the third embodiment>
Next, the effect of this embodiment will be described with reference to FIG. The graph of FIG. 8 is a graph comparing the measurement result of the vibration sound of the cable 40B by the vibration detection device of the present embodiment and the measurement result of the first comparative embodiment. The method of the test based on this graph is the same as that of the graph of FIG.
In the case of the present embodiment, the acceleration (dB) is smaller at all the measured frequencies than in the case of the first comparative embodiment. That is, the holding portion 50B of the present embodiment exerts the first effect of the first embodiment. Further, it can be said that the present embodiment exhibits the second effect and the third effect of the first embodiment.

The above is the description of the effect of this embodiment. Further, the above is the description of the third embodiment.

<< Example >>
Next, each embodiment (first embodiment and second embodiment) will be described with reference to the drawings. Hereinafter, when the same components as those of the first embodiment are used among the components of each embodiment described later, the present embodiment will be described using the same names, reference numerals, and the like as the components of the first embodiment.

<First Example>
In the first embodiment, regarding the relationship between the number of bendings of the cable 40 (the number of portions where the bending shape is formed) and the vibration sound, the cable 40 having the number of bendings of 1 to 3 times (first to third samples). And the first comparative form without bending shape were tested.
Here, FIG. 9A is a plan view of the first sample (number of bends once) of the test of the first embodiment. FIG. 9B is a plan view of the second sample (twice the number of bends) of the test of the first embodiment. FIG. 9C is a plan view of a third sample (number of bends of 3 times) of the test of the first embodiment. The cable 40 of each sample was bent by the number of bending times and fixed to the test table (not shown) with tape.
FIG. 9D is a graph comparing the measurement result of the vibration sound of the cable 40 by the vibration detection device 10 of the first embodiment and the measurement result of the comparative example (first comparative embodiment). The method of the test based on this graph is the same as that of the graph of FIG.

As shown in the graph of FIG. 9D, it was found that the larger the number of bends, the smaller the amount of vibration generated by the cable 40 detected by the vibration sensor 20. In particular, since the amount of vibration detected by the vibration sensor 20 is almost the same as the background noise when the number of bendings is 3 or more, it has been found that the number of bendings is preferably 3 or more.

The above is the description of the first embodiment.

<Second Example>
In the second embodiment, regarding the relationship between the bending angle of the cable 40 and the vibration sound, the first to fourth samples having bending angles of 45 °, 90 °, 135 ° and 180 ° have no bending shape (bending angle). Was tested with the first comparative form (of 0 °).
Here, FIG. 10 is a graph showing the results of the test of the second embodiment, and is a measurement result of the vibration sound of the cable 40 by the vibration detection device 10 of the second embodiment and a comparative example (second comparative embodiment). It is a graph comparing with the measurement result of. The method of the test based on this graph is the same as that of the graph of FIG.

As shown in the graph of FIG. 10, it was found that in the first to fourth samples, the amount of vibration generated by the cable 40 detected by the vibration sensor 20 was reduced as compared with the first comparative form. That is, it was found that when the bending angle is 45 ° or more and 180 ° or less, there is an effect of reducing the detection amount of the vibration generated in the cable 40 by the vibration sensor 20 as compared with the case where there is no bending shape.

The above is the description of the second embodiment. Further, the above is the description of the embodiment.

As described above, the present invention has been described with reference to the first to third embodiments, the first to third samples of the first embodiment, and the first to fourth samples of the second embodiment as examples. It is not limited to the form. The technical scope of the present invention also includes, for example, the following forms (modifications).

For example, the vibration detection device 10 of each embodiment is assumed to be a biological sound acquisition device for detecting biological sound as an example. However, if the detection target is sound (vibration), the detection target of the vibration detection device 10 of each embodiment does not have to be a biological sound. For example, it may be a device or other detection device that detects sound from a machine having a vibration source (not shown).

Further, the vibration sensor 20 of each embodiment has been described as being a capacitance type sensor. However, the method of the vibration sensor 20 does not have to be the capacitance method as long as the sound to be detected can be detected. For example, a piezoelectric method, an eddy current method, or another method may be used.

Further, the holding portion 50 of the first embodiment has a base 52 and a fitting groove 54, which have been described as being an integral body (see FIGS. 2A and 2B). However, the base 52 and the fitting groove 54 may be separate members, and the holding portion 50 may be an assembly thereof.

Further, the holding portion 50 of the first embodiment has been described as having a base 52 and a fitting groove 54 provided so as to project from one surface side of the base 52 (see FIGS. 2A and 2B). However, if the fitting groove 54 can fit a part of the cable 40 and form a curved shape in a part of the cable 40, the fitting groove 54 may be a recess (notch) formed in the base 52. good. In the case of this modification, the structure can be made simpler (can be reduced in cost) as compared with the holding portion 50 of the first embodiment.

Further, the holding portion 50 of the first embodiment has been described as being made of silicon rubber. However, it may be made of rubber other than silicon rubber. For example, the holding portion 50 may be made of urethane or other rubber.

Further, the holding portion 50 of the first embodiment has been described as having a base 52 (see FIGS. 2A and 2B). However, the base 52 may be omitted as long as the curved shape can be maintained in a part of the cable 40. For example, it may be a U-shaped groove wall in which a bent portion is formed, as in the holding portion 50C of the first modification of FIG. 11A. Further, as in the holding portion 50D of the second modification of FIG. 11B, it is composed of two linear groove walls 50D1 and a connecting rod 50D2 capable of holding the two groove walls 50D1 at a predetermined crossing angle. It may be a member to be used.

This application claims priority on the basis of Japanese application Japanese Patent Application No. 2018-226299 filed on 3 December 2018 and incorporates all of its disclosures herein.

10 Vibration detection device 20 Vibration sensor 30 Signal receiver 40 Cable 50 Holding 52 Base (example of plate-shaped body)
54 Fitting groove (example of groove)
BP1 Bent part BP2 Bent part BP3 Bent part BP4 Bent part CP1 Bent part CP2 Bent part CP3 Bent part CP4 Bent part LP1 Bent part LP2 Straight part LP2 Straight part LP3 Part LP4 Linear part LP5 Linear part

Claims (7)

Vibration sensor and
A signal receiving unit that receives the detection signal of the vibration sensor,
A cable that is connected to the vibration sensor on one end side and connected to the signal receiving unit on the other end side to transmit the detection signal to the signal receiving unit.
A holding portion attached to the cable or the housing of the vibration sensor, integrally formed with the cable or the housing, and holding the cable in a bent shape at at least one position of the cable.
Equipped with
The holding portion has a plate-shaped body and a bent-shaped groove portion formed or provided on one surface side of the plate-shaped body, and a part of the cable is fitted into the groove portion and attached to the cable. Vibration detector. The holding portion is attached to the cable or integrally formed with the cable at one end side of the center in the length direction of the cable.
The vibration detection device according to claim 1. The bending angle of the bending shape is 45 ° or more and 180 ° or less.
The vibration detection device according to claim 1 or 2. The holding portion holds the cable in a state where the bent shape is formed at a plurality of positions of the cable.
The vibration detection device according to any one of claims 1 to 3. The bent shapes at least two of the plurality of places are bent in opposite directions to each other.
The vibration detection device according to claim 4. The plate-shaped body and the groove portion are made of rubber and are integrated.
The vibration detection device according to any one of claims 1 to 5 . It is attached to a cable that transmits the detection signal of the vibration sensor connected to one end side to the signal receiving unit connected to the other end side, and is integrally formed with the cable or integrally with the vibration sensor and the cable. Being done
It has a plate-shaped body and a bent-shaped groove formed or provided on one side of the plate-shaped body, and a part of the cable is fitted into the groove and attached to the cable.
The cable is held in a state where a bent shape is formed at at least one place of the cable.
Holding part.

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