JP2017131582A - Sensor unit, nursing bed, mounting method of radio wave sensor, and manufacturing method of nursing bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sensor unit comprising a radio wave sensor having high detection accuracy.SOLUTION: A sensor unit 10 installed in a nursing bed 300 comprising a bottom 310 including a penetration part 310h comprises: a radio wave sensor 100 for transmitting and receiving radio waves for detecting a body condition of a care receiver on the nursing bed 300; and a fixing tool 500 for fixing the radio wave sensor 100 to the bottom 310 of the nursing bed 300. The fixing tool 500 fixes the radio wave sensor 100 to the bottom 310 while at least a portion of one of the radio wave sensor 100 and the fixing tool 500 is housed in the penetration part 310h.SELECTED DRAWING: Figure 5B

Description

  The present invention relates to a sensor unit provided with a radio wave sensor for detecting the body condition of a cared person, a care bed provided with the sensor unit, a radio wave sensor attaching method for attaching the radio wave sensor to the care bed, and radio waves The present invention relates to a method for manufacturing a nursing bed provided with a sensor.

  In the field of welfare or care, a system for detecting the physical condition of a caregiver or care recipient such as an elderly person or a sick person lying on a bed has been proposed (for example, see Patent Document 1).

  In such a system, using a Doppler sensor, which is a radio wave sensor installed on the ceiling or wall of the room where the care bed is placed, the state of breathing or body movement of the care recipient in the care bed Is detected.

JP 2012-5745 A

  However, the above system has a problem that the body condition of the care recipient cannot be detected with high accuracy.

  Accordingly, an object of the present invention is to provide a sensor unit including a radio wave sensor with high detection accuracy.

  In order to achieve the above object, one aspect of a sensor unit according to the present invention is a sensor unit installed on a nursing bed having a bottom having a through-hole that is a hole or a fixed gap, A radio wave sensor that transmits and receives radio waves to detect the physical condition of the care recipient on the bed; and a fixture that fixes the radio wave sensor to the bottom of the care bed. The radio wave sensor is fixed to the bottom in a state where at least a part of any one of the radio wave sensor and the fixture is housed in the penetrating portion.

  Moreover, the one aspect | mode of the bed for care which concerns on this invention is equipped with the said sensor unit, the said bottom, and the flame | frame which supports the said bottom.

  In addition, one aspect of the method for attaching the radio wave sensor according to the present invention is to transmit radio waves in order to detect the body condition of a cared person on a care bed provided with a bottom having a through-hole that is a hole or a fixed gap. And a radio wave sensor that performs reception to the care bed, and includes a fixing step of fixing the radio wave sensor to the bottom of the care bed using a fixing tool, The radio wave sensor is fixed to the nursing bed by fixing the radio wave sensor to the bottom in a state in which at least a part of any one of the radio wave sensor and the fixture is housed in the penetration portion. Install.

  Moreover, one aspect of the method for manufacturing a care bed according to the present invention is a method for manufacturing a care bed comprising a bottom having a through-hole that is a hole or a fixed gap, and the care bed on the care bed is provided. A mounting step of attaching a radio wave sensor for transmitting and receiving radio waves to detect a person's physical condition to the care bed using a fixture, wherein the mounting step includes at least the radio wave sensor and the fixture. The radio wave sensor is attached to the nursing bed by fixing the radio wave sensor to the bottom in a state in which any one of them is housed in the penetration portion.

  ADVANTAGE OF THE INVENTION According to this invention, the detection accuracy of a cared person's physical condition can be improved.

FIG. 1 is a configuration diagram of a watching system according to an embodiment. FIG. 2 is a diagram illustrating an example of an attachment position of the radio wave sensor in the embodiment. FIG. 3 is a diagram illustrating a mounting position of the radio wave sensor when the care bed is viewed from above and below in the embodiment. FIG. 4A is a diagram illustrating a configuration of a sensor unit in the embodiment. FIG. 4B is a cross-sectional view of the fixture according to the embodiment. FIG. 5A is a diagram illustrating a state in which the radio wave sensor is attached to the bottom with an elastic pressing type fixing device in the embodiment. 5B is a cross-sectional view taken along the line II of FIG. 5A. FIG. 6A is a diagram illustrating a state in which the radio wave sensor is attached to the bottom with an expansion / contraction pressing type fixing tool in the embodiment. 6B is a cross-sectional view taken along line II-II in FIG. 6A. FIG. 7A is a diagram illustrating another example of a state in which the radio wave sensor is attached to the bottom with an expansion and contraction pressing type fixing device in the embodiment. 7B is a cross-sectional view taken along line III-III in FIG. 7A. FIG. 8A is a diagram illustrating a state in which the radio wave sensor is attached to the bottom with a holding-type fixture in the embodiment. 8B is a cross-sectional view taken along line IV-IV in FIG. 8A. FIG. 9A is a diagram illustrating another example of a state in which the radio wave sensor is attached to the bottom with a holding-type fixture in the embodiment. 9B is a cross-sectional view taken along line VV in FIG. 9A. FIG. 10A is a diagram illustrating a state in which the radio wave sensor is attached to the bottom with an inner surface mounting type fixing tool in the embodiment. 10B is a cross-sectional view taken along line VI-VI in FIG. 10A. FIG. 11A is a diagram illustrating another example of a state in which the radio wave sensor is attached to the bottom with an inner surface attachment type fixing device in the embodiment. 11B is a cross-sectional view taken along line VII-VII in FIG. 11A. FIG. 12A is a diagram illustrating a state in which the radio wave sensor is attached to the bottom with an inner surface mounting type fixing tool including a magnet in the embodiment. 12B is a cross-sectional view taken along line VIII-VIII in FIG. 12A. FIG. 13A is a diagram illustrating a state in which the composite type fixture in the embodiment is attached to the bottom. 13B is a cross-sectional view taken along line IX-IX in FIG. 13A. FIG. 14 is a diagram showing variations in the mounting position of the radio wave sensor in the vertical direction according to the embodiment. FIG. 15 is a flowchart illustrating a method for attaching the radio wave sensor according to the embodiment. FIG. 16A is a diagram illustrating a schematic configuration of the radio wave sensor according to the embodiment. FIG. 16B is a diagram illustrating a functional schematic configuration of the radio wave sensor according to the embodiment. FIG. 17 is a cross-sectional view of the case of the radio wave sensor according to the embodiment. FIG. 18 is a cross-sectional view of a case made of a single material of the radio wave sensor according to the embodiment. FIG. 19 is a cross-sectional view of a case having an absorber of the radio wave sensor according to the embodiment. FIG. 20 is a cross-sectional view of a case having a reflector of the radio wave sensor according to the embodiment. FIG. 21 is a cross-sectional view of a case having an inclined side wall of the radio wave sensor according to the embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention will be described as optional constituent elements that constitute a more preferable embodiment.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment)
<System>
FIG. 1 is a configuration diagram of a watching system according to the present embodiment.

  The monitoring system 1 in the present embodiment is installed in a facility where a plurality of care beds 300 are placed, such as a hospital or a care facility. Specifically, the watching system 1 includes a plurality of radio wave sensors 100 that respectively detect the cared person's physical condition, and a processing device 200 that performs processing related to the cared person's physical condition detected by the radio wave sensor 100. Is provided. The care recipient is an elderly person, a sick person, or a care recipient who uses the care bed 300 in the facility, but is not limited thereto, and may be a living body. In addition, the cared person's physical condition refers to the movement of the cared person, for example, a body movement such as heartbeat, pulse, breathing, or turning over. In the present embodiment, the monitoring system 1 installed in a facility where a plurality of nursing beds 300 are placed will be described as an example. This monitoring system 1 includes a single nursing bed 300. It may be a system installed in the house where it is placed.

  The radio wave sensor 100 is attached to the nursing bed 300 in the facility, and detects the body condition of the cared person on the nursing bed 300 by transmitting and receiving radio waves such as microwaves. The radio wave sensor 100 issues an alarm to the processing device 200 by transmitting an alert signal if there is an abnormality in the detected physical condition of the cared person. For example, the radio wave sensor 100 issues an alarm to the processing device 200 when a state in which no care recipient has a heartbeat continues for a predetermined period. Furthermore, the radio wave sensor 100 transmits biometric information indicating the detected physical state of the care receiver to the processing device 200 in response to a command from the processing device 200.

  The processing device 200 is installed, for example, in a care station of a care facility, and communicates with each of the radio wave sensors 100 via power line carrier communication (hereinafter referred to as PLC: Power Line Communication). Accordingly, when the processing device 200 receives an alert signal from the radio wave sensor 100 via the PLC, the processing device 200 issues an alarm to the care staff. In addition, when the processing apparatus 200 instructs the radio wave sensor 100 via the PCL and receives biological information from the radio wave sensor 100, the processing apparatus 200 displays the body state of the care recipient indicated by the biological information.

  Note that the processing apparatus 200 may communicate with the radio wave sensor 100 by wireless communication such as WiFi (registered trademark) or Bluetooth (registered trademark), or may communicate with the radio wave sensor 100 via a wire.

<Radio sensor mounting position>
FIG. 2A is a diagram illustrating an example of an attachment position of the radio wave sensor 100.

  As shown in FIG. 2A, the care bed 300 has a bottom 310 on which the mattress 400 is placed, a metal frame 320 that supports the bottom 310, and an adjustment that adjusts the posture, inclination, and height of the bottom 310. Mechanism 330. The care recipient lies on the mattress 400 of the care bed 300 or takes an end-sitting posture.

  In the following, in this specification, “up, upward or upward” refers to the upward, upward or upward direction in the vertical direction, and the orientation of the mattress 400 of the care bed 300 and the mattress 400 in the arrangement direction of the bottom 310. is there. Further, “downward, downward, or downward” is downward, downward, or downward in the vertical direction, and is an orientation of the mattress 400 of the care bed 300 and the bottom 310 in the arrangement direction of the bottom 310. The vertical direction is the Z-axis direction, the upper side is the plus side, and the lower side is the minus side. Further, the length direction (that is, the longitudinal direction) of the care bed 300 is the X-axis direction, the caregiver's foot side (back side) lying on the care bed 300 is the plus side, and the head side (front side) is the minus side. . Furthermore, the width direction (that is, the short direction) of the care bed 300 is the Y-axis direction, the left side of the caregiver lying on the care bed 300 is the plus side, and the right side is the minus side.

  The radio wave sensor 100 is attached to such a nursing bed 300. Specifically, the radio wave sensor 100 is attached to the care bed 300 so as to be embedded in a hole or a gap of the bottom 310, for example. That is, the radio wave sensor 100 is attached to a portion of the care bed 300 that is below the upper surface of the mattress 400 and above the frame 320. A fixture 500 is used for this attachment. Details of the fixture 500 will be described later.

  The radio wave sensor 100 transmits a radio wave from the portion attached in this way toward the upper surface side (that is, the upper side) of the mattress 400 and receives a reflected wave of the radio wave. The radio wave sensor 100 detects the cared person's physical condition on the mattress 400 based on the reflected wave. Specifically, the radio wave sensor 100 determines or detects the body condition of the cared person based on the Doppler waveform obtained from the reflected wave that is Doppler shifted according to the movement of the reflector. Note that the determination or detection of such a physical state may be performed by the processing device 200. That is, the radio wave sensor 100 outputs information on the transmitted radio wave and the received reflected wave to the processing device 200, and the processing device 200 determines or detects the physical condition of the care receiver based on the output. .

  In the present embodiment, the sensor unit 10 includes the radio wave sensor 100 and the fixture 500. In other words, the sensor unit 10 in the present embodiment includes the radio wave sensor 100 and the fixture 500. The fixing tool 500 fixes the radio wave sensor 100 at a position below the upper surface of the mattress 400 placed on the care bed 300 in the care bed 300.

  FIG. 3 is a diagram illustrating a mounting position of the radio wave sensor 100 when the care bed 300 is viewed from the up and down direction. 3A is a view of the nursing bed 300 from which the mattress 400 has been removed as viewed from above, and FIG. 3B is a view of the nursing bed 300 as viewed from below. is there.

  The bottom 310 includes a substantially flat plate-like back bottom 311, a waist bottom 312, a knee bottom 313, and a foot bottom 314, respectively. The back bottom 311, the waist bottom 312, the knee bottom 313, and the foot bottom 314 are arranged along the longitudinal direction of the care bed 300, and are respectively rotatably connected to the adjacent bottoms. Further, the bottom 310 is formed with a plurality of holes or gaps 310h penetrating in the vertical direction. These through portions 310h are formed for the purpose of ventilation or weight reduction, for example.

  The frame 320 includes a plurality of beams 321. For example, each of the plurality of beams 321 has a longitudinal direction (X-axis direction) in a state along a direction (Y-axis direction) perpendicular to the longitudinal direction of the care bed 300 on a plane parallel to the bottom 310. Arranged in position.

  As shown in FIG. 3, the radio wave sensor 100 is attached to, for example, the back bottom 311 in the bottom 310. More specifically, the radio wave sensor 100 is attached to a portion of the back bottom 311 that is closest to the cared person's chest when the cared person lies on the care bed 300. For example, the radio wave sensor 100 is housed in the through-hole 310h of the back bottom 311 and is fixed by the fixing tool 500 described above.

  Further, the adjusting mechanism 330 described above includes, for example, a plurality of arms, and the heights and inclinations of the back bottom 311, the waist bottom 312, the knee bottom 313, and the foot bottom 314 are changed by the plurality of arms.

  As described above, the care bed 300 according to the present embodiment includes the sensor unit 10 described above, the bottom 310 on which the mattress 400 is placed, and the frame 320 that supports the bottom 310. The watching system 1 according to the present embodiment includes a radio wave sensor 100 and a processing device 200 that processes an output from the radio wave sensor 100. And the processing apparatus 200 is a process (for example, a process of a display, an alarm, etc.) regarding the cared person's body detected based on the Doppler waveform obtained from the above-mentioned reflected wave shifted by the Doppler shift according to the motion of the reflector. I do.

<Sensor unit>
As described above, the sensor unit 10 in the present embodiment includes the radio wave sensor 100 and the fixture 500. The fixing device 500 according to the present embodiment is configured such that at least a part of either the radio wave sensor 100 or the fixing device 500 is stored in a through-hole 310h formed in the bottom 310. The sensor 100 is fixed to the bottom 310.

  Further, in the following description, at least a part of either one of the radio wave sensor 100 and the fixture 500 will be described as an example stored in a through-hole 310h formed as a hole in the bottom 310. The through portion 310h is not limited to the hole. For example, if a gap fixed to any one of the back bottom 311, the waist bottom 312, the knee bottom 313, and the foot bottom 314 constituting the bottom 310 is formed, at least the radio wave sensor 100 and the fixation thereof are formed in the gap. A part of any one of the tools 500 may be stored. That is, any one of the back bottom 311, the waist bottom 312, the knee bottom 313, and the foot bottom 314 is a state in which a plurality of long plates are arranged with gaps along the short side direction (so-called snowboards). The above-mentioned part may be stored in the gap. Such a gap is not a variable gap like the gaps of the back bottom 311, the waist bottom 312, the knee bottom 313, and the foot bottom 314, but is fixed. Such a fixed gap can be handled as the through-hole 310h in the same manner as the above-described hole. Hereinafter, in the present embodiment, description will be given by taking the through portion 310h formed as a hole as an example, but the through portion 310h may be the above-described fixed gap.

  Hereinafter, the sensor unit in the present embodiment will be described in detail.

<Fix the radio wave sensor by pressing>
FIG. 4A is a diagram showing a configuration of a sensor unit in the present embodiment. FIG. 4B is a cross-sectional view of the fixture 500.

  The sensor unit 10 according to the present embodiment includes a radio wave sensor 100 and a pressing type fixture 500 that fixes the radio wave sensor 100 to the bottom 310 by pressing.

  The pressing-type fixing device 500 includes a base plate 501 having a substantially rectangular flat plate shape, two plate-like pressing portions 502 that are erected on the base plate 501 and face each other, and the two pressing portions 502 and the base plate 501. Two walls 504 facing each other and outer claws 503 provided at the respective tips of the two pressing portions 502. The two pressing portions 502 and the two walls 504 are erected on the base plate 501 so as to surround a central portion of the lower surface (the negative side surface in the Z-axis direction) of the base plate 501. The two pressing portions 502 and the two walls 504 each have elasticity. Further, the outer claw 503 protrudes from the tip of the pressing portion 502 to the opposite side to the other pressing portion 502 side. Further, as shown in FIG. 4B, an inner claw 505 that protrudes toward the other pressing portion 520 is formed at the tip of the pressing portion 502. Similarly, an inner claw that protrudes toward the other wall 504 is also formed at the tip of the wall 504.

  Further, in the arrangement direction (X-axis direction) of the two pressing portions 502, the distance L1 between the pressing portions, which is the distance from the outside of one pressing portion 502 to the outside of the other pressing portion 502, is the width of the through portion 310h. Longer than. 4B, the radio wave sensor 100 is disposed in a space 504a between the two pressing portions 502 and the two walls 504. For example, the radio wave sensor 100 is pushed into the space 504a while bending the two pressing portions 502 and the two walls 504. As a result, the radio wave sensor 100 is held by the two pressing portions 502 and the two walls 504, the inner claws 505, and the lower surface of the base plate 501.

  Such a fixing device 500 is made of, for example, silicon, and is a pressing type fixing device (hereinafter referred to as an elastic pressing type) that fixes the radio wave sensor 100 to the bottom 310 by pressing the elastic force of the pressing portion 502.

  FIG. 5A and FIG. 5B are diagrams showing a state in which the radio wave sensor 100 is attached to the bottom 310 by an elastic pressing type fixture 500. 5A is a view of the bottom 310 as viewed from above, and FIG. 5B is a cross-sectional view of the bottom 310 as viewed from the side surface (Y-axis direction), which is a cross-sectional view taken along the line II in FIG. 5A. .

  When the radio wave sensor 100 is attached to the care bed 300 with such an elastic pressing type fixing device 500, the radio wave sensor 100 is inserted into the space 504a of the fixing device 500 and the radio wave sensor 100 is inserted into the inner claw 505 or the like. Lock. Then, the two pressing portions 502 of the fixture 500 are inserted into the through portion 310 h of the bottom 310 from above the bottom 310.

  At this time, as described above, since the distance L1 between the pressing portions is longer than the width L2 of the through portion 310h, each of the two pressing portions 502 is pressed inside the through portion 310h by the inner surface of the through portion 310h of the bottom 310. The When the two pressing portions 502 are inserted until the base plate 501 comes into contact with the upper surface of the bottom 310, the outer claw 503 is engaged with the lower surface of the bottom 310.

  As described above, the two pressing parts 502 and the radio wave sensor 100 are inserted into the penetration part 310h in a state where the radio wave sensor 100 is disposed between the two pressing parts 502. In such a case, each of the two pressing portions 502 causes the radio wave sensor 100 and its inner surface to move by elastic force generated by being sandwiched between the inner surface of the through-hole 310h and the radio wave sensor 100 in the bottom 310. Press.

  As a result, the fixture 500 fixes the radio wave sensor 100 to the bottom 310.

  That is, the sensor unit 10 in the present embodiment is a sensor unit that is installed on the care bed 300 having the bottom 310, and transmits radio waves to detect the body condition of the care recipient on the care bed 300. And a radio wave sensor 100 that performs reception, and a fixture 500 that fixes the radio wave sensor 100 to the bottom 310 of the care bed 300. The fixing device 500 fixes the radio wave sensor 100 to the bottom 310 in a state where at least a part of either the radio wave sensor 100 or the fixing device 500 is accommodated in the through-hole 310h formed in the bottom 310. To do.

  As described above, in the present embodiment, at least a part of at least one of the radio wave sensor 100 and the fixture 500 is accommodated in the through-hole 310 h formed in the bottom 310. Therefore, the space of the penetration part 310h can be used effectively, and it can be suppressed that the sensor unit 10 becomes an obstacle to the movement of the movable part of the care bed 300.

  In the example shown in FIGS. 4A to 5B, the radio wave sensor 100 and a part of the fixture 500 are accommodated in the through-hole 310h. A part of the fixture 500 is disposed between the radio wave sensor 100 and the inner surface of the through-hole 310 h in the bottom 310, and presses the radio wave sensor 100 and the inner surface thereof so that the radio wave sensor 100 is moved to the bottom 310. Secure to.

  Thereby, the radio wave sensor 100 can be firmly fixed to the bottom 310.

  In the example shown in FIGS. 4A to 5B, the fixture 500 has elasticity, and includes two pressing portions 502 that are inserted into the penetrating portion 310 h as part of the above-described fixture 500. When the radio wave sensor 100 is disposed between the two pressing portions 502 and the two pressing portions 502 and the radio wave sensor 100 are inserted into the through-hole 310h, the two pressing portions 502 are respectively The radio wave sensor 100 and its inner surface are pressed by an elastic force generated by being sandwiched and deformed between the inner surface of the through-hole 310h in the bottom 310 and the radio wave sensor 100.

  Thereby, the radio wave sensor 100 can be firmly fixed to the bottom 310. In the example shown in FIGS. 4A to 5B, the fixture 500 is made of silicon, so that it can perform a waterproof function for the radio wave sensor 100.

<Fix the radio wave sensor by stretching>
Here, the fixing tool may be an expansion / contraction pressing type fixing tool that is pressed by expansion / contraction, instead of the elastic pressing type fixing tool 500 that is pressed by elasticity, as shown in FIGS. 4A to 5B.

  6A and 6B are views showing a state in which the radio wave sensor 100 is attached to the bottom 310 with a telescopic pressing type fixing tool. 6A is a view of the bottom 310 as seen from above, and FIG. 6B is a cross-sectional view of the bottom 310 as seen from the back (plus side in the X-axis direction). FIG.

  The telescopic pressing type fixing device 500 a includes two air bags 506. These air bags 506 expand and contract by expanding or contracting depending on the amount of air enclosed inside.

  When the radio wave sensor 100 is attached to the care bed 300 by using such a stretchable pressing type fixing device 500, first, the radio wave sensor 100 and the two air bags 506 are inserted into the through portion 310h of the bottom 310. At this time, air bags 506 are disposed at both ends of the radio wave sensor 100. Then, air is injected into the air bag 506 and inflated. As a result, the two air bags 506 expand in the width direction (Y-axis direction) of the bottom 310 by being inflated. The two air bags 506 press the radio wave sensor 100 and the inner surface of the through portion 310h in the bottom 310 by such extension. Thereby, the radio wave sensor 100 is fixed to the bottom 310.

  In addition, the expansion / contraction pressing type fixing device may be a fixing device that expands and contracts by a spring instead of the fixing device 500a including the two air bags 506.

  FIGS. 7A and 7B are diagrams illustrating another example of a state in which the radio wave sensor 100 is attached to the bottom 310 with an expansion / contraction pressing type fixing tool. 7A is a view of the bottom 310 as viewed from above, and FIG. 7B is a cross-sectional view of the bottom 310 as viewed from the back (plus side in the X-axis direction). FIG.

  The telescopic pressing type fixing device 500 b includes two spring mechanisms 507.

  The spring mechanism 507 includes a spring 513, a shaft core 514 inserted into the center of the spring 513, and a support portion 511 that has a recess into which the base end of the shaft core 514 is inserted and supports the base end.

  When the radio wave sensor 100 is attached to the care bed 300 by using such a stretchable pressing type fixture 500b, first, the support portions 511 of the two spring mechanisms 507 are hooked on the peripheral portion of the through portion 310h in the bottom 310. Then, the tips of the shaft cores 514 of the two spring mechanisms 507 are brought into contact with the radio wave sensor 100. At this time, the respective springs 513 of the two spring mechanisms 507 are pressed and contracted by the radio wave sensor 100 and the support portion 511 and are urged. The two spring mechanisms 507 press the radio wave sensor 100 and the inner surface of the through portion 310h in the bottom 310 by such biasing. Thereby, the radio wave sensor 100 is fixed to the bottom 310.

  As described above, in the example illustrated in FIGS. 6A to 7B, the radio wave sensor 100 and the fixture 500a or 500b are accommodated in the penetration part 310h. And the fixture 500a or 500b is comprised so that expansion-contraction is possible. Such a fixture 500a or 500b is disposed between the radio wave sensor 100 and the inner surface of the through-hole 310h in the bottom 310 and extends to press the radio wave sensor 100 and the inner surface thereof.

  Thereby, the radio wave sensor 100 can be firmly fixed to the bottom 310.

  Further, unlike the above-described elastic pressing type and expansion / contraction pressing type, the fixing tool may be a holding type fixing tool that holds the radio wave sensor 100 using the upper surface of the bottom 310.

<Holding the radio wave sensor using a hook>
8A and 8B are views showing a state in which the radio wave sensor 100 is attached to the bottom 310 with a holding-type fixture. 8A is a view of the bottom 310 as viewed from above, and FIG. 8B is a cross-sectional view of the bottom 310 as viewed from the side, taken along the line IV-IV in FIG. 8A.

  The holding-type fixture 500c includes two hooks 521 and a substantially flat holding member 522 that holds the two hooks 521 in a slidable manner.

  When the radio wave sensor 100 is attached to the care bed 300 using such a holding-type fixture 500c, first, the radio wave sensor 100 is attached to a substantially central portion of the holding member 522.

  Then, with the two hooks 521 pulled out from the holding member 522, the holding member 522 is mounted on the upper surface of the bottom 310 so that the radio wave sensor 100 attached to the holding member 522 is inserted from above into the through portion 310h. Put. At this time, each of the two hooks 521 pulled out is inserted from above into different through portions 310h on both sides of the through portion 310h into which the radio wave sensor 100 is inserted. Then, each of the two hooks 521 is slid so as to approach the holding member 522 side and hooked on the peripheral edge portion of the through portion 310 h in the bottom 310.

  Since the holding member 522 is in contact with or locked to the peripheral portion of the through portion 310h on the upper surface of the bottom 310 by such attachment, the radio wave sensor 100 does not fall from the through portion 310h of the bottom 310. Retained. Further, since the hook 521 is hooked on the peripheral edge of the through portion 310 h in the bottom 310, the radio wave sensor 100 is held so as not to move along the upper surface of the bottom 310. Therefore, the radio wave sensor 100 is fixed to the bottom 310 in a state where it is suspended from the holding member 522.

  8A and 8B, the fixture 500c includes the holding member 522 that is placed on the upper surface of the bottom 310 so as to close at least a part of the through portion 310h. The holding member 522 fixes the radio wave sensor 100 to the bottom 310 by holding a portion on the upper surface side of the bottom 310 in the radio wave sensor 100 housed in the penetration part 310h.

  Thereby, the radio wave sensor 100 can be firmly fixed to the bottom 310 in the vertical direction.

  8A and 8B, the fixture 500c includes a hook 521 that is slidably attached to the holding member 522. By sliding, the hook 521 is hooked on the periphery of the other through-hole 310 h formed at a position different from the through-hole 310 h in which the radio wave sensor 100 is housed in the bottom 310.

  Thereby, the radio wave sensor 100 can be firmly fixed to the bottom 310 in the direction along the top surface of the bottom 310.

<Holds radio wave sensor with adhesive>
In addition, the holding-type fixture may use an adhesive instead of the hook 521.

  9A and 9B are diagrams showing another example of the state in which the radio wave sensor 100 is attached to the bottom 310 with a holding-type fixture. 9A is a view of the bottom 310 as viewed from above, and FIG. 9B is a cross-sectional view of the bottom 310 as viewed from the side, which is a cross-sectional view taken along the line VV in FIG. 9A.

  A holding-type fixture 500d shown in FIGS. 9A and 9B includes a holding member 523 formed in a substantially flat plate shape, and an adhesive 531 applied to the holding member 523.

  When the radio wave sensor 100 is attached to the care bed 300 using such a holding-type fixture 500d, first, the radio wave sensor 100 is attached to a substantially central portion of the holding member 523.

  Then, the holding member 523 is placed on the upper surface of the bottom 310 so that the radio wave sensor 100 is inserted into the penetration part 310h from above. At this time, a part of the lower surface of the holding member 523 and the peripheral portion of the through portion 310 h on the upper surface of the bottom 310 are adhered by the adhesive 531.

  Since the holding member 523 is in contact with or locked to the peripheral portion of the through portion 310h on the upper surface of the bottom 310 by such attachment, the radio wave sensor 100 does not fall from the through portion 310h of the bottom 310. Retained. Further, since the holding member 523 and the upper surface of the bottom 310 are adhered by the adhesive 531, the radio wave sensor 100 is held so as not to move along the upper surface of the bottom 310. Therefore, the radio wave sensor 100 is fixed to the bottom 310 in a state of being hung from the holding member 523, similarly to the example shown in FIGS. 8A and 8B.

  As described above, in the example illustrated in FIGS. 9A and 9B, the holding member 523 is attached to the upper surface of the bottom 310 by the adhesive 531. Therefore, the radio wave sensor 100 can be firmly fixed to the bottom 310 in the direction along the top surface of the bottom 310.

<Fix the radio wave sensor to the inner surface of the penetrating part>
The fixture may be an inner surface mounting type fixture that attaches the radio wave sensor 100 to the inner surface of the through portion 310h in the bottom 310.

  FIGS. 10A and 10B are views showing a state in which the radio wave sensor 100 is attached to the bottom 310 with an inner surface mounting type fixing tool. 10A is a view of the bottom 310 as viewed from above, and FIG. 10B is a cross-sectional view of the bottom 310 as viewed from the side, which is a cross-sectional view taken along line VI-VI in FIG. 10A.

  The inner surface mounting type fixture 500e is configured as a seal in which an adhesive is applied to both surfaces.

  When the radio wave sensor 100 is attached to the care bed 300 using such a holding-type fixture 500e, first, the fixture 500e is attached to the inner surface of the through-hole 310h in the bottom 310. Next, the radio wave sensor 100 is pressed against the fixture 500e so that the fixture 500e is sandwiched between the radio wave sensor 100 and the inner surface thereof. Thereby, the radio wave sensor 100 is fixed to the bottom 310 by the adhesive of the fixture 500e. Note that the fixture 500e may be a liquid or gel adhesive instead of a seal.

  FIG. 11A and FIG. 11B are diagrams showing another example of a state in which the radio wave sensor 100 is attached to the bottom 310 with an inner surface attachment type fixing tool. 11A is a view of the bottom 310 as viewed from above, and FIG. 11B is a cross-sectional view of the bottom 310 as viewed from the side, which is a cross-sectional view taken along line VII-VII in FIG. 11A.

  In the example shown in FIGS. 11A and 11B, the inner surface mounting type fixing device 500f is formed of a sandwiched object configured like a vise. Such a fixture 500f has two caps 533a. The fixture 500f is configured such that the width between the caps 533a can be adjusted in a state where the two caps 533a face each other.

  When the radio wave sensor 100 is attached to the care bed 300 using such an inner surface mounting type fixture 500f, the radio wave sensor 100 is first attached to the fixture 500f. Next, the fixture 500f to which the radio wave sensor 100 is attached is inserted into the through portion 310h of the bottom 310. Then, by fitting the peripheral portion of the through portion 310h in the bottom 310 between the two caps 533a of the fixture 500f and narrowing the width between the two caps 533a, the bottom 310 is held between the fixtures 500f. Let Thereby, the radio wave sensor 100 is fixed to the bottom 310 by holding the fixture 500f.

  In the fixing tool 500f, the width between the two caps 533a can be adjusted. However, a holding object whose width cannot be adjusted may be used as the fixing tool. In this case, the width between the two caps is slightly shorter than the thickness of the bottom 310, and these caps have elasticity. When the radio wave sensor 100 is attached to the care bed 300 with such a fixture, the penetration portion 310h of the bottom 310 is interposed between the two bases while bending them so that the width between the two bases is widened. Fit the periphery. Thereby, the radio wave sensor 100 is fixed to the bottom 310 by holding the fixture.

  Further, a magnet may be used to attach the radio wave sensor 100 to the fixture 500f. That is, the fixture may include a magnet.

  FIG. 12A and FIG. 12B are diagrams illustrating an example of a state in which the radio wave sensor 100 is attached to the bottom 310 by an inner surface mounting type fixing tool including a magnet. 12A is a view of the bottom 310 as viewed from above, and FIG. 12B is a cross-sectional view of the bottom 310 as viewed from the side, which is a cross-sectional view taken along line VIII-VIII in FIG. 12A.

  The inner surface mounting type fixing device 500 g includes a sandwiching object 533 and a magnet 534. The sandwiched object 533 is made of, for example, a ferromagnetic metal material, and has the same configuration as the above-described fixture 500f. The case of the radio wave sensor 100 attached by the fixture 500g is also made of a ferromagnetic metal material.

  When the radio wave sensor 100 is attached to the care bed 300 using such an inner surface mounting type fixture 500g, first, the radio wave sensor 100 is attached to the holding object 533 by the magnetic force of the magnet 534. Next, the holding object 533 to which the radio wave sensor 100 is attached is inserted into the through part 310 h of the bottom 310. Then, the bottom 310 is sandwiched between the two holding bases 533 by fitting the peripheral part of the through-hole 310h in the bottom 310 between the two bases 533a of the sandwiching part 533 and narrowing the width between the two bases 533a. Let Thereby, the radio wave sensor 100 is fixed to the bottom 310 by the holding of the holding object 533 and the magnetic force of the magnet 534.

  Note that, in the sandwiched object 533, the width between the two caps 533a can be adjusted, but the width may not be adjustable in the same manner as the above-described fixture 500f. Further, when the magnet 534 is used as described above, the radio wave of the radio wave sensor 100 may be affected by the magnet 534. However, if the magnet 534 is arranged in a direction opposite to the direction of the main detection target (for example, the cared person's chest) as viewed from the radio wave sensor 100, the influence can be reduced.

  As described above, in the example illustrated in FIGS. 10A to 12B, the fixture fixes the radio wave sensor 100 to the inner surface of the through portion 310 h in the bottom 310. Thereby, the radio wave sensor 100 can be easily attached without depending on the shape of the through-hole 310h. Moreover, since the structure of the fixture is simple, the fixture can be manufactured at low cost.

<Composite type>
The fixture may have a composite configuration including the above-described air bag and magnet.

  FIGS. 13A and 13B are diagrams illustrating an example of a state in which the radio wave sensor 100 is attached to the bottom 310 by a fixture having a composite configuration. 13A is a view of the bottom 310 as viewed from above, and FIG. 13B is a cross-sectional view of the bottom 310 as viewed from the side, which is a cross-sectional view taken along line IX-IX in FIG. 13A.

  The composite fixture 500h is made of a ferromagnetic metal material, and includes a support plate 541 having a recess 541a, a magnet 534, and an air bag 506. The case of the radio wave sensor 100 attached by the fixture 500h is also made of a ferromagnetic metal material.

  When the radio wave sensor 100 is attached to the care bed 300 by the fixture 500h having such a composite configuration, first, the radio wave sensor 100 is attached to the bottom surface of the concave portion 541a of the support plate 541 by the magnetic force of the magnet 534. Then, an air bag 506 is inserted between each of the two inner side surfaces of the recess 541 a in the support plate 541 and the radio wave sensor 100. Then, air is injected into those air bags 506 to inflate the air bags 506. As a result, the air bladder 506 presses the radio wave sensor 100 and the inner surface of the recess 541a in the support plate 541. Therefore, the radio wave sensor 100 is fixed so as not to move in the recess 541 a not only by the magnetic force of the magnet 534 described above but also by pressing by the air bladder 506. Then, the support plate 541 is placed on the upper surface of the bottom 310 in a state where the radio wave sensor 100 and the air bag 506 are housed in the recess 541a. At this time, the radio wave sensor 100 housed in the concave portion 541a of the support plate 541 is inserted into the through portion 310h of the bottom 310 until the side portion 541b around the concave portion 541a of the support plate 541 contacts the upper surface of the bottom 310. Is done.

  Accordingly, the vertical shift or movement of the radio wave sensor 100 can be suppressed by the support by the support plate 541 and the magnetic force of the magnet 534. Further, the displacement or movement of the radio wave sensor 100 in the direction along the upper surface of the bottom 310 can be suppressed by the pressing of the air bladder 506 and the magnetic force of the magnet 534. Therefore, the radio wave sensor 100 can be firmly fixed to the bottom 310.

(Summary)
As described above, the sensor unit in the present embodiment is the sensor unit 10 installed in the care bed 300 including the bottom 310 having the through portion 310h which is a hole or a fixed gap. This sensor unit 10 fixes a radio wave sensor 100 that transmits and receives radio waves to detect the physical condition of the care recipient on the care bed 300, and the radio wave sensor 100 to the bottom 310 of the care bed 300. Fixing device (500, 500a to 500g), and the fixing device includes the radio wave sensor 100 in a state where at least a part of either the radio wave sensor 100 or the fixing device is housed in the through-hole 310h. Fix to the bottom 310.

  Thereby, the radio wave sensor 100 is fixed to the bottom 310. Therefore, even if the care bed 300 is gaged up or down, or the angle of the bottom 310 is adjusted, the positional relationship between the radio wave sensor 100 and the care receiver on the care bed 300 can be kept constant. . As a result, the detection accuracy of the body condition of the cared person by the radio wave sensor 100 can be increased.

  Further, the bottom 310 in which the through portion 310h is formed is often made of a resin material. Therefore, by fixing the radio wave sensor 100 to the bottom 310 made of such a resin material, it is possible to suppress the influence on the detection accuracy of the radio wave sensor 100 by the metal member of the care bed 300. Further, when the radio wave sensor 100 is housed in the through-hole 310h of the bottom 310 made of such a resin material, the peripheral portion of the bottom 310 around the through-hole 310h suppresses the spread of radio waves. Therefore, the directivity of the radio wave of the radio wave sensor 100 can be reduced to the care receiver side on the care bed 300. Even if the radio wave sensor 100 is not housed in the penetration part 310h, if the radio wave sensor 100 is directly under the penetration part 310h, the directivity of the radio wave of the radio wave sensor 100 can be set on the care bed 300. Can be narrowed down to the side of the elderly Therefore, the detection accuracy of the body condition of the cared person by the radio wave sensor 100 can be further increased.

  Furthermore, since at least a part of the radio wave sensor 100 and the fixtures 500 or 500a to 500g is housed in the through-hole 310h, physical interference with the constituent members of the care bed 300 is suppressed. be able to. That is, even when the nursing bed 300 moves, when the gadging up or down of the nursing bed 300 or the angle adjustment of the bottom 310 is performed, the sensor unit 10 can be prevented from obstructing the movement. it can.

  Further, the radio wave sensor 100 and at least a part of the fixture 500 may be housed in the through-hole 310h. At least a part of the fixture 500 is disposed between the radio wave sensor 100 and the inner surface of the through-hole 310h in the bottom 310, and presses the radio wave sensor 100 and the inner surface thereof, thereby lowering the radio wave sensor 100 to the bottom. You may fix to 310.

  Thereby, the radio wave sensor 100 can be firmly fixed inside the through-hole 310h.

  Further, for example, as shown in FIGS. 4A to 5B, the fixture 500 has elasticity, and each of the fixtures 500 may include two pressing portions 502 inserted into the through portions 310 h as at least a part of the fixture 500. Good. When the radio wave sensor 100 is disposed between the two pressing portions 502 and the two pressing portions 502 and the radio wave sensor 100 are inserted into the through-hole 310h, the two pressing portions 502 are respectively You may press the radio | wireless sensor 100 and its inner surface with the elastic force which arises by being pinched | interposed into the inner surface of the penetration part 310h in the bottom 310, and the radio wave sensor 100, and deform | transforming.

  Thereby, the radio wave sensor 100 can be easily fixed to the bottom 310 in a state where the radio wave sensor 100 is housed in the through-hole 310h.

  For example, as shown in FIGS. 6A to 7B, the radio wave sensor 100 and the fixtures (500a, 500b) may be housed in the through-hole 310h. The fixture is configured to be freely extendable and disposed between the radio wave sensor 100 and the inner surface of the through portion 310h in the bottom 310, and may be extended to press the radio wave sensor 100 and the inner surface thereof. .

  Thereby, the radio wave sensor 100 can be firmly fixed inside the through-hole 310h. In addition, since the fixing device 500a or 500b presses the radio wave sensor 100 and the inner surface of the penetration part 310h by extending, the fixture 500a or 500b does not depend on the shape of the penetration part 310h, and the radio wave sensor 100 is housed in the penetration part 310h. It can be fixed to the bottom 310.

  Further, for example, as shown in FIGS. 8A to 9B, the fixtures (500c, 500d) are mounted on the upper surface of the bottom 310 (522, 523) so as to block at least a part of the opening of the through portion 310h. ) May be provided. The holding member may fix the radio wave sensor 100 to the bottom 310 by holding the upper surface side portion of the bottom 310 in the radio wave sensor 100 housed in the through portion 310h.

  Thereby, the radio wave sensor 100 can be easily fixed to the bottom 310 in a state where the radio wave sensor 100 is housed in the through-hole 310h. Further, the configuration of the fixture 500c or 500d can be simplified, and as a result, the cost can be reduced.

  8A and 8B, the fixing device 500c further includes a hook 521 that is slidably attached to the holding member 522, and the hook 521 slides at the bottom 310, as shown in FIG. You may be hooked on the periphery of the other penetration part 310h formed in the position different from the penetration part 310h in which the electromagnetic wave sensor 100 is accommodated.

  Thereby, the shift | offset | difference of the radio wave sensor 100 of the direction along the upper surface of the bottom 310 can be suppressed, and the detection accuracy of the radio wave sensor 100 can be improved.

  9A and 9B, the holding member 523 may be attached to the upper surface of the bottom 310 with an adhesive 531.

  Thereby, the shift | offset | difference of the radio wave sensor 100 of the direction along the upper surface of the bottom 310 can be suppressed, and the detection accuracy of the radio wave sensor 100 can be improved.

  Moreover, as shown to FIG. 10A-FIG. 12B, the fixture (500e-500g) may fix the electromagnetic wave sensor 100 to the inner surface of the penetration part 310h in the bottom 310. FIG.

  Accordingly, the radio wave sensor 100 can be easily fixed to the bottom 310 in a state where the radio wave sensor 100 is housed in the through part 310h without depending on the shape of the through part 310h. Moreover, the structure of the fixtures 500e-500g can be simplified, As a result, cost reduction can be aimed at.

  Further, in the present embodiment, all of the radio wave sensor 100 is accommodated in the penetration part 310h, but not all of the radio wave sensor 100 may be accommodated.

  FIG. 14 is a diagram illustrating variations in the mounting position of the radio wave sensor 100 in the vertical direction.

  As shown in FIG. 14A, the radio wave sensor 100 may be fixed to the bottom 310 so as to be positioned directly below the penetrating portion 310h by, for example, a fixing tool including the support plate 541 shown in FIG. 13B. . Further, as shown in FIG. 14B, the radio wave sensor 100 is fixed to the bottom 310 by the fixture made of the support plate 541 while only the upper part of the radio wave sensor 100 is housed in the through-hole 310h. May be.

  The care bed 300 in the present embodiment includes the sensor unit 10, the bottom 310, and the frame 320 that supports the bottom 310.

  Thereby, the body condition of the care receiver on the care bed 300 can be detected with high sensitivity. In addition, since the radio wave sensor 100 is fixed as described above, the body condition can be detected without making the cared person on the care bed 300 aware of the radio wave sensor 100.

  FIG. 15 is a flowchart showing a method of attaching the radio wave sensor 100 in the present embodiment.

  The attachment method of the radio wave sensor 100 in the present embodiment is a method in which the radio wave sensor 100 that transmits and receives radio waves to detect the body condition of the care recipient on the care bed 300 is attached to the care bed 300. is there. Such an attachment method includes a fixing step S <b> 11 for fixing the radio wave sensor 100 to the bottom 310 of the care bed 300 using the fixing tool 500 or 500 a to 500 g. In the fixing step S <b> 11, the radio wave sensor 100 is placed in a state where at least a part of either the radio wave sensor 100 and the fixtures 500 or 500 a to 500 g is accommodated in the through-hole 310 h formed in the bottom 310. The radio wave sensor 100 is attached to the care bed 300 by being fixed to the bottom 310.

  Thereby, the detection accuracy of the radio wave sensor 100 can be increased.

  Moreover, the manufacturing method of the care bed 300 in this Embodiment is a manufacturing method of the care bed 300 provided with the bottom 310 which has the penetration part 310h which is a hole or the fixed clearance gap. In this manufacturing method, the radio wave sensor 100 that transmits and receives radio waves to detect the body condition of the cared person on the care bed 300 is used by using a fixture (500, 500a to 500g) and the care bed. An attachment step for attaching to 300. In this attachment step, the radio wave sensor 100 is cared for by fixing the radio wave sensor 100 to the bottom 310 in a state where at least a part of either the radio wave sensor 100 or the fixture is housed in the through-hole 310h. Attach to the bed 300.

  That is, the method for manufacturing the care bed 300 includes the fixing step S11 shown in FIG. 15 as an attachment step. Thereby, the bed 300 for nursing care provided with the radio wave sensor 100 with high detection accuracy can be manufactured.

<Radio sensor case>
In the present embodiment, the radio wave sensor 100 is attached below the upper surface of the mattress 400 in the care bed 300, so that a change in sensitivity due to gadging up or down of the care bed 300 can be suppressed. For example, in order to obtain waterproofness, the radio wave sensor 100 may be configured by covering a sensor body that transmits and receives radio waves such as microwaves with a case. Moreover, when such a radio wave sensor 100 is attached under the nursing bed 300, the directivity of the radio wave is adjusted by the peripheral part of the through part 310h of the bottom 310 as described above. The radio wave sensor 100 may include a case capable of further narrowing the directivity toward the care recipient. Hereinafter, variations of the radio wave sensor 100 in the present embodiment will be described in detail.

  16A and 16B are diagrams showing a schematic configuration of the radio wave sensor 100 according to the present embodiment.

  The radio wave sensor 100 includes a sensor main body 110 made of a circuit board or the like, and a case 120 that covers the sensor main body 110. The sensor main body 110 includes a radio wave transmission unit 110a that transmits radio waves, and a radio wave reception unit 110b that receives reflected waves of the radio waves transmitted from the radio wave transmission unit 110a.

  FIG. 17 is a cross-sectional view of the case 120 in the radio wave sensor 100.

  The case 120 is formed in, for example, a substantially rectangular parallelepiped shape, and includes an upper wall 120a and a bottom wall 120c facing each other, and side walls 120b in contact with the peripheral edges of the upper wall 120a and the bottom wall 120c. The sensor main body 110 is placed on the bottom wall 120c in the case 120 so that the front surfaces of the radio wave transmitting unit 110a and the radio wave receiving unit 110b face the inner surface of the upper wall 120a. The front surface of the radio wave transmitting unit 110a is a surface where, for example, the strongest radio wave is transmitted in the radio wave transmitting unit 110a, and the front surface of the radio wave receiving unit 110b is, for example, a radio wave receiving sensitivity in the radio wave receiving unit 110b. The highest aspect.

  Here, the radio wave transmittance of the upper wall 120a of the case 120 in the present embodiment is transmissivity = T1, and the transmissivity of the side wall 120b and the bottom wall 120c is transmissivity = T2 (<T1). is there. For example, the upper wall 120a is made of a resin material, and the side wall 120b and the bottom wall 120c are made of a metal material.

  As described above, radio wave sensor 100 according to the present embodiment includes radio wave transmitter 110a that transmits radio waves, radio wave receiver 110b that receives reflected waves of radio waves transmitted from radio wave transmitter 110a, and radio wave transmitter 110a. And a case 120 that houses the radio wave receiving unit 110b.

  In the example illustrated in FIG. 17, the case 120 includes a first part configured as the upper wall 120 a of the case 120 and a second part configured as the side wall 120 b and the bottom wall 120 c. The radio wave transmittance at the first part is higher than the radio wave transmittance at the second part. In addition, the first part is located at a position facing the front of each of the radio wave transmitting unit 110a and the radio wave receiving unit 110b in the case 120.

  Thereby, the directivity of the radio wave transmitted from the radio wave sensor 100 and the received radio wave can be limited. That is, the directivity of the radio wave can be narrowed down to the direction perpendicular to the front surfaces of the radio wave transmitting unit 110a and the radio wave receiving unit 110b and toward the upper wall 120a when viewed from the sensor body 110. Therefore, by attaching such a radio wave sensor 100 to the position shown in FIG. 2 of the care bed 300 with the upper wall 120a side of the case 120 facing upward, it is possible to make it less susceptible to noise. . Specifically, the range of radio waves transmitted from the radio wave sensor 100 can be limited to the range of the care recipient on the care bed 300. As a result, radio waves are transmitted toward a person or an animal away from the nursing bed 300 or a metal structure of the nursing bed 300, and a reflected wave of the transmitted radio waves is received. Can be suppressed. Therefore, the detection accuracy of the cared person's physical condition can be improved.

  Moreover, in the upper wall 120a shown in FIG. 17, the transmittance | permeability of all the parts in the upper wall 120a is higher than the transmittance | permeability of the side wall 120b and the bottom wall 120c. However, only the transmittance of a part of the upper wall may be higher than the transmittance of the side wall 120b and the bottom wall 120c.

  Further, the case 120 of the radio wave sensor 100 may be made of a single material.

  FIG. 18 is a cross-sectional view of the case 120 made of a single material in the radio wave sensor 100.

  The case 120 is formed in, for example, a substantially rectangular parallelepiped shape, and includes an upper wall 120d and a bottom wall 120c facing each other, and side walls 120b in contact with the peripheral edges of the upper wall 120d and the bottom wall 120c. Here, the side wall 120b, the bottom wall 120c, and the upper wall 120d are made of the same material. For example, these walls are made of a resin material. The thickness of the upper wall 120d is thinner than the thickness of the side wall 120b and the bottom wall 120c.

  That is, in the example shown in FIG. 18, the second part configured as the side wall 120b and the bottom wall 120c is thicker than the first part configured as the upper wall 120d. Therefore, the radio wave transmittance at the first part is higher than the radio wave transmittance at the second part.

  Thereby, the directivity of the radio wave transmitted from the radio wave sensor 100 and the received radio wave can be limited.

  The case 120 of the radio wave sensor 100 may have a radio wave absorber.

  FIG. 19 is a cross-sectional view of case 120 having an absorbent material in radio wave sensor 100.

  The case 120 is formed, for example, in a substantially rectangular parallelepiped shape, and includes an upper wall 120d and a bottom wall 120c that face each other, and a side wall 122 that contacts each peripheral edge of the upper wall 120d and the bottom wall 120c. Here, the side wall 122 is made of an absorbing material that absorbs radio waves. The absorbent material is, for example, ceramics. More specifically, the absorber is made of a conductive material such as carbon, a magnetic material such as ferrite, or a dielectric material such as SiC ceramics. Moreover, TiO2 (titanium oxide (IV), titanium dioxide, titania) may be sufficient as an absorber.

  That is, in the example illustrated in FIG. 19, the second portion configured as the side wall 122 includes an absorbent material that absorbs the transmitted radio wave. Therefore, the radio wave transmittance of the first part configured as the upper wall 120d is higher than the radio wave transmittance of the second part configured as the side wall 122.

  Thereby, the directivity of the radio wave transmitted from the radio wave sensor 100 and the received radio wave can be limited.

  Moreover, only a part of the side wall may be made of an absorbent material. For example, an absorption sheet made of an absorbing material that absorbs radio waves may be attached to a side wall made of a resin material.

  The case 120 of the radio wave sensor 100 may have a radio wave reflecting material.

  FIG. 20 is a cross-sectional view of case 120 having a reflective material in radio wave sensor 100.

  The case 120 is formed in, for example, a substantially rectangular parallelepiped shape, and includes an upper wall 120d and a bottom wall 120c facing each other, and side walls 124 that are in contact with the peripheral edges of the upper wall 120d and the bottom wall 120c. Here, the side wall 124 is made of a reflective material that reflects radio waves. The reflective material is, for example, a metal member. The upper wall 120d and the bottom wall 120c are made of a resin material or the like.

  That is, in the example illustrated in FIG. 20, the second portion configured as the side wall 124 includes a reflective material that reflects the transmitted radio wave. Therefore, the radio wave transmittance in the first part configured as the upper wall 120d is higher than the radio wave transmittance in the second part configured as the side wall 124.

  Thereby, the directivity of the radio wave transmitted from the radio wave sensor 100 and the received radio wave can be limited.

  Moreover, only a part of the side wall may be made of a reflective material. For example, a reflective sheet made of a reflective material that reflects radio waves may be attached to a side wall made of a resin material.

  In addition, the structure which covers all the inner surfaces of a side wall like a metal plate or metal foil may be sufficient as a reflective sheet, and the structure which covers the inner surface partially may be sufficient as it. The reflection sheet that partially covers the inner surface is a metal plate in which a plurality of holes are formed, or a metal plate or metal coating formed in a mesh shape.

  Further, the side wall of the case 120 may be inclined.

  FIG. 21 is a cross-sectional view of case 120 having an inclined side wall in radio wave sensor 100.

  Similar to the case 120 shown in FIG. 20, the case 120 has an upper wall 120d and a bottom wall 120c facing each other, and side walls 124 that are in contact with the peripheral edges of the upper wall 120d and the bottom wall 120c. Here, in the example shown in FIG. 21, the upper wall 120d is wider than the bottom wall 120c, and the side wall 124 is inclined so as to fall to the outside of the case 120 toward the upper wall 120d side. In other words, the case 120 is formed so that the cross-sectional shape thereof is a shape composed of four sides of an inverted isosceles trapezoid.

  That is, in the example shown in FIG. 21, the case 120 is disposed between the upper wall 120d that constitutes the first portion and the upper wall 120d that face the front surfaces of the radio wave transmission unit 110a and the radio wave reception unit 110b. Provided between the bottom wall 120c and the upper wall 120d so as to surround the radio wave transmitting unit 110a and the radio wave receiving unit 110b, and the bottom wall 120c facing the upper wall 120d so as to sandwich the radio wave transmitting unit 110a and the radio wave receiving unit 110b. And a side wall 124 constituting the second portion. The side wall 124 is inclined so that the region surrounded by the peripheral edge in contact with the upper wall 120d on the side wall 124 is wider than the region surrounded by the peripheral edge in contact with the bottom wall 120c on the side wall 124.

  Thereby, the radio wave transmitted from the radio wave sensor 100 toward the side wall 124 can be reflected on the side wall 124 and transmitted to the upper side of the care bed 300 via the upper wall 120d. Furthermore, even if the reflected wave from the care receiver on the care bed 300 is separated from the radio wave receiving unit 110b, the reflected wave can be reflected on the side wall 124 and received by the radio wave receiving unit 110b.

  Thereby, the directivity of the transmitted radio wave can be limited and the reception sensitivity of the reflected wave can be improved.

  Further, only a part of the inclined side wall may be constituted by the reflecting material.

  As described above, the sensor unit, the care bed, the radio wave sensor mounting method, and the care bed manufacturing method of the present invention have been described based on the embodiments. However, the present invention is not limited to the embodiments. . Without departing from the gist of the present invention, various modifications conceived by those skilled in the art have been made in this embodiment, and other forms constructed by arbitrarily combining some components in the embodiments and modifications are also possible. Are included within the scope of the present invention.

  For example, the shape of the case 120 in the embodiment is not limited to a substantially rectangular parallelepiped, and may be any shape. For example, the shape of the case 120 may be a cylindrical shape. In addition, the method of detecting or determining the physical state using the radio wave sensor 100 is not limited to the method using the Doppler waveform. Moreover, the bed 300 for care of embodiment may be equipped with the radio wave sensor 100 of the structure shown to FIG. 16A-21, and may be equipped with the radio wave sensor different from the structure. Furthermore, in the embodiment, the care bed 300 has been described as an example. However, the radio wave sensor 100 may be attached to a general bed without being limited to care.

  In addition, it is realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, or a form obtained by subjecting each embodiment to various modifications conceived by those skilled in the art. Forms are also included in the present invention.

DESCRIPTION OF SYMBOLS 10 Sensor unit 100 Radio wave sensor 310h Penetration part 320 Frame 500, 500a-500g Fixture 502 Press part 521 Hook 522, 523 Holding member 531 Adhesive

Claims (11)

A sensor unit installed in a nursing bed comprising a bottom having a through-hole that is a hole or a fixed gap,
A radio wave sensor for transmitting and receiving radio waves to detect the physical condition of the care recipient on the care bed;
A fixture for fixing the radio wave sensor to the bottom of the care bed,
The fixing device is a sensor unit that fixes the radio wave sensor to the bottom in a state in which at least a part of either the radio wave sensor or the fixture is housed in the penetration portion. The radio wave sensor and at least a part of the fixture are housed in the penetrating portion,
At least a portion of the fixture is
The sensor according to claim 1, wherein the sensor is disposed between the radio wave sensor and an inner surface of the penetrating portion at the bottom, and presses the radio wave sensor and the inner surface to fix the radio wave sensor to the bottom. unit. The fixture is
Each having elasticity, and having two pressing portions inserted into the penetrating portion, respectively, as at least a part of the fixture,
When the two pressing portions and the radio wave sensor are inserted into the penetration portion in a state where the radio wave sensor is disposed between the two pressing portions, each of the two pressing portions is the bottom The sensor unit according to claim 2, wherein the radio wave sensor and the inner surface are pressed by elastic force generated by being deformed by being sandwiched between the inner surface of the penetrating portion and the radio wave sensor. The radio wave sensor and the fixture are housed in the penetrating portion,
The fixture is
It is configured to be stretchable,
The sensor unit according to claim 2, wherein the sensor unit is disposed between the radio wave sensor and the inner surface of the penetrating portion at the bottom, and presses the radio wave sensor and the inner surface by extending. The fixture is
A holding member placed on the upper surface of the bottom so as to block at least a part of the opening of the penetrating portion;
The sensor unit according to claim 1, wherein the holding member fixes the radio wave sensor to the bottom by holding a portion on the upper surface side of the bottom in the radio wave sensor housed in the penetration portion. The fixture further includes a hook slidably attached to the holding member,
The sensor unit according to claim 5, wherein the hook is hooked to a peripheral portion of another through portion formed at a position different from the through portion in which the radio wave sensor is accommodated at the bottom. The sensor unit according to claim 5, wherein the holding member is attached to the upper surface of the bottom with an adhesive. The sensor unit according to claim 1, wherein the fixing device fixes the radio wave sensor to an inner surface of the penetrating portion in the bottom. A nursing bed,
The sensor unit according to any one of claims 1 to 8,
The bottom;
A frame that supports the bottom;
A nursing bed comprising A method of attaching a radio wave sensor for transmitting and receiving radio waves to detect the body condition of a cared person on a care bed provided with a bottom having a through-hole that is a hole or a fixed gap to the care bed Because
Using a fixture, including a fixing step of fixing the radio wave sensor to the bottom of the care bed,
In the fixing step,
The radio wave sensor is fixed to the nursing bed by fixing the radio wave sensor to the bottom in a state in which at least a part of any one of the radio wave sensor and the fixture is housed in the penetration portion. Installation How to install the radio wave sensor. A care bed manufacturing method comprising a bottom having a through-hole that is a hole or a fixed gap,
An attachment step of attaching a radio wave sensor for transmitting and receiving radio waves to detect the physical condition of the care recipient on the care bed to the care bed using a fixture;
In the attaching step,
The radio wave sensor is fixed to the nursing bed by fixing the radio wave sensor to the bottom in a state in which at least a part of any one of the radio wave sensor and the fixture is housed in the penetration portion. A method of manufacturing a nursing bed to be attached.

Images