JP5508967B2 - Care receiver motion detection device - Google Patents

Description

  The present invention relates to a care receiver operation detection device for detecting a bed removal operation of a cared person who often lies on a bed and preventing a fall accident or wrinkle.

  For example, a cared person who often lies in bed due to dementia may fall while trying to get out of bed despite difficulty in walking, or get out of bed without the care of a caregiver such as a nurse. There is a possibility of encountering an accident. Therefore, conventionally, when a detection device equipped with a pyroelectric infrared sensor is installed in the vicinity of the bed and the cared person gets up on the bed and tries to leave the bed, the weak infrared light emitted from the cared person is detected. Thus, there has been proposed a care receiver motion detection device that can determine whether or not there is a bed preparation operation (see, for example, Patent Document 1).

  In such a conventional care receiver operation detection device, a pyroelectric infrared sensor is fixed at a height where it can detect weak infrared rays emitted from the neck and head of the care receiver who has raised his upper body on the bed. The signal detected by this pyroelectric infrared sensor is input to a CPU (Central Processing Unit). And when this CPU judges the operation of the care recipient by analyzing the output signal (output waveform) of the pyroelectric infrared sensor in relation to the threshold value, and determines that it is a bed preparation operation, wireless communication It is possible to notify the nearest caregiver via a communication line.

JP 2009-77908 A

  However, the above-described conventional care receiver motion detection device is easily noticeable because it is installed in the vicinity of the care receiver's bed and slightly higher than the total height of the bed, and thus the detection device is used as a monitoring camera for the care receiver. Or suspicious objects. In such a case, the care receiver motion detection device may cause discomfort, and the care receiver motion detection device may worsen the medical condition. In addition, the care receiver may get angry and damage the detection device. It is quite possible to try. There is also a risk that the cared person will put the detection device in his / her mouth.

  In addition, such a conventional care receiver motion detection device detects weak infrared rays emitted from a care receiver at a predetermined height on the bed, and analyzes the output waveform of the detection signal, thereby analyzing the care receiver's motion. Since the operation is determined, there is a problem that a complicated determination processing circuit is required and it takes some time to output the determination result. That is, since the response (responsiveness) is slightly slow, when the caregiver's getting-off preparation operation is detected, there is a possibility that a notification to the caregiver is delayed and a fall accident or the like cannot be prevented.

  In addition, in such a conventional care receiver motion detection device, the installation location of the sensor unit must be carefully selected because of the complicated determination processing based on the output waveform of the sensor unit (pyroelectric infrared sensor) as described above. However, the environment around the care recipient's bed varies, and the sensor unit may not be installed at a desired position. In addition, when the position of the care recipient's bed is changed, complicated work is required to re-install the sensor unit at a new position. Therefore, such a conventional care receiver motion detection device has a user-friendliness that it is difficult to deal with various environments in a care site.

  The present invention has been made in view of such a state of the art, and an object of the present invention is to promptly notify the care recipient of getting out of bed and to easily arrange the sensor unit at a desired position. It is another object of the present invention to provide a care receiver motion detection device that can be installed inconspicuously and is less likely to cause trouble.

  In order to achieve the above object, a care receiver motion detection device of the present invention includes a mounting base attached to a head side frame of a cared person's bed, a sensor housing attached to the mounting base, A distance sensor capable of outputting a signal corresponding to the distance to the detected object that is housed in the sensor housing and is present in a predetermined direction, and the care recipient is in preparation for getting out of bed based on the output signal of the distance sensor Determination guide means for determining whether or not there is, and outputting a notification signal when it is determined that the preparation for getting out of bed is being performed, and a guide portion extending along the width direction of the bed is provided on the mounting base. The sensor storage body is supported by the guide portion in an engaged state in which the sensor storage body is slidable in the extending direction, and a stopper that prevents the slide movement of the sensor storage body is provided on the mounting base. Attached Was the configuration that is has.

  The care receiver motion detection device configured as described above detects a care receiver's getting-off preparation operation performed at a specific place on the bed based on the output signal of the distance sensor. That is, the side guard for fall prevention is normally attached to the both sides of a care receiver's bed, and the place where a care receiver can get off the bed is limited. In fact, there are very many attempts to get out of only one side of the bed due to the arrangement of the bed and the habit of the care recipient. Therefore, when the cared person gets up on the bed and starts the bed preparation operation, the upper body of the cared person is present at a specific place on the bed where the detected object does not normally exist. Therefore, if the presence / absence of the object to be detected in this specific place is detected by the distance sensor, it is possible to detect the caregiver's getting-off preparation operation, and thus the judgment reporting means can detect the object without performing complicated analysis processing. Whether or not the caregiver is in preparation for getting out of bed can be determined instantaneously, and notification to the nearest caregiver can be made quickly.

  In addition, the care receiver motion detection device has a mounting base fixed to the head frame of the bed and a sensor storage body storing a distance sensor is mounted on the mounting base. It is easy to install the detection device so as to be inconspicuous, for example, by forming the storage body into an appearance that looks like a part of a bed or a decoration. It is not impossible to use the detection device fixed to the foot frame of the bed, but since there are many futons piled up on the foot side of the care recipient's bed, the distance sensor The possibility of the front view being blocked is extremely high, which is not preferable.

  Further, the care receiver motion detection device is configured such that the sensor storage body storing the distance sensor is supported by the guide portion of the mounting base in an engaged state in which the sensor storage body is slidable along the width direction of the bed. It is easy for a person to place a distance sensor at a desired position corresponding to a specific place where the person is to prepare for getting out of the bed, and the sensor housing can be easily fixed by a stopper, which is convenient. In addition, since the detection device is directly attached to the bed, it is not easily restricted by the environment around the bed, and even when the position of the bed is changed, there is no need to newly attach the detection device.

  In the above configuration, when the distance sensor is a PSD sensor including a light source and a semiconductor position detection element (PSD element), a specific place on the bed is obtained by a small distance sensor that has a very fast response, a high resolution, and a small size. This makes it possible to detect the presence / absence of an object to be detected, which is preferable because it can improve detection accuracy and speed of notification. In this case, the sensor storage body is configured by combining a main body portion that can store and position the PSD sensor and a holding portion that is fitted in the main body portion and can hold the PSD sensor, and the main body portion includes the PSD sensor. A through-hole is formed to project the light source and the semiconductor position detecting element, and a part of the holding part protruding outward from the main body part is slidably engaged with the guide part of the mounting base. In this case, a sensor housing body having a simple structure that can be housed and held without impairing the function of the PSD sensor and can smoothly slide along the guide portion can be easily realized.

  In the above configuration, when the guide portion is formed as a dovetail-shaped guide groove and the leg portion slidably fitted to the guide groove projects from the sensor housing, the sensor housing This is preferable because the body can be slid along the extending direction of the guide groove without fear of dropping off. In this case, if the stopper is configured to be crimped to the guide groove by its own elasticity, when the sensor housing is fixed at a predetermined position, the stopper only needs to be crimped to the guide groove at a position adjacent to the leg portion. Therefore, the operation of arranging the distance sensor at a desired position can be performed very easily. However, the guide portion of the mounting base is not limited to the guide groove. For example, the sensor housing is slidably engaged with a guide rail or a guide shaft provided on the mounting base as a guide portion. Is also possible.

  According to the care receiver operation detection device of the present invention, the determination notification means detects the care receiver's getting-off preparation operation performed at a specific place on the bed based on the output signal of a distance sensor such as a PSD sensor. Therefore, it is possible to instantly determine whether or not the care recipient is in the bed leaving operation without performing complicated analysis processing, and it is possible to promptly notify the nearest caregiver. In other words, since this care receiver operation detection device has a fast response (responsiveness), when the care receiver starts the bed preparation operation, the care worker can rush before it is too late and has high practical value. In addition, the care receiver motion detection device has a mounting base fixed to the head frame of the bed and a sensor storage body storing a distance sensor is mounted on the mounting base. It is easy to install the storage body so as to be inconspicuous, for example, by forming the storage body into an appearance that looks like a part of a bed or a decoration, and therefore it is difficult to cause trouble. In addition, since this care receiver motion detection device is supported by the guide portion of the mounting base in an engaged state in which the sensor housing is slidable along the width direction of the bed, the care receiver performs the bed leaving preparation operation. The distance sensor can be easily arranged at a desired position according to a specific place to be performed, and the sensor housing can be easily fixed by the stopper, so that it is easy to use. In addition, since this care receiver motion detection device is directly attached to the bed and is not easily restricted by the environment around the bed, it is easy to cope with various environments in the care site, and this is convenient.

It is explanatory drawing which shows the usage example of the care receiver operation | movement detection apparatus which concerns on the embodiment of this invention. It is a principal part enlarged view of FIG. It is a side view which shows the whole structure of this detection apparatus. It is a top view of the detection device. It is a bottom view of the detection device. It is an external view which shows the sensor storage body of this detection apparatus. It is sectional drawing of this sensor storage body which accommodated the distance sensor. It is a side view of this sensor storage body. It is a principal part bottom view which shows the state which removed the holding | maintenance part from this sensor storage body, and exposed the distance sensor. It is a principal part bottom view which shows the state which removed the distance sensor in FIG. It is a principal part front view of this sensor storage object which omitted illustration of a distance sensor. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is a top view of the fastener used in order to fix this sensor container. It is a side view of this stopper. It is a front view of this stopper. It is a flowchart for demonstrating the detection operation of this detection apparatus. It is an external view which shows the modification of this sensor storage body.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 5, the care receiver motion detection device 1 according to this embodiment is used by being attached to the head side frame 21 of the bed 20 of the care receiver 15. This detection device 1 is for detecting in advance a bed removal operation of a cared person 15 who often lies on a bed 20 due to dementia or the like, thereby preventing a fall accident or wrinkle.

  First, the overall configuration of the care receiver motion detection device 1 will be described. This detection device 1 has a mounting base 3 (see FIG. 3) fixed to the head-side frame 21 of the bed 20 using the mounting bracket 2 and a holding portion 4 that engages with the guide groove 3 a of the mounting base 3. A sensor housing 6 (see FIG. 6) assembled by being fitted into the columnar body 5, a PSD (Position Sensitive Detector) sensor 7 (see FIG. 7) housed in the sensor housing 6, and a guide groove A stopper 8 (see FIG. 4) that is crimped to 3a to prevent the sensor housing 6 from sliding, and a controller 9 (see FIG. 3) that is electrically connected to the PSD sensor 7 via the cable 10. It is mainly composed by.

  The mounting base 3 is firmly attached to the frame 21 by tightening the mounting bracket 2 from the back side after loosely inserting the head-side frame (headboard) 21 of the bed 20 into the recess 3b and covering the frame 21. It is attached. The mounting pedestal 3 is formed by processing wood in the same manner as the head-side frame 21, and the longitudinal direction of the mounting pedestal 3 is the width direction of the bed 20 in a state of being covered with the frame 21, and the mounting pedestal 3 The longitudinal dimension is set substantially equal to the width dimension of the bed 20. Therefore, when the mounting base 3 is attached to the head-side frame 21, it has an appearance like a cover of the frame 21. In addition, a guide groove 3 a that extends linearly along the longitudinal direction is formed on the upper surface of the mounting base 3. As shown in FIG. 2, since the cross-sectional shape of the guide groove 3a is a trapezoid whose lower side is longer than the upper side and the back side is widened, the guide groove 3a is a so-called dovetail.

  The main body portion 5 and the holding portion 4 constituting the sensor housing 6 are also formed by processing wood, and in this embodiment, the appearance of the sensor housing 6 is similar to a toy train. Yes. As shown in FIGS. 6 to 13, a storage chamber 5 a into which the PSD sensor 7 is incorporated is provided at the center of the main body 5 of the sensor storage 6, and the front side of the main body 5 (on the bed 20). A pair of through holes 5b are provided in the wall portion on the side facing the light source (LED) 7a of the PSD sensor 7 and the semiconductor position detecting element (PSD element) 7b. Further, the holding portion 4 is formed with a plate-like portion 4a that is fitted into a part of the storage chamber 5a and a leg portion 4b having a trapezoidal cross-sectional view that protrudes downward from the plate-like portion 4a. The plate-like portion 4a holds the PSD sensor 7 in the storage chamber 5a, and the leg portion 4b is slidably fitted to the guide groove 3a.

  When incorporating the PSD sensor 7 into the storage chamber 5a of the main body 5, first, the main body 5 is turned upside down, and the PSD sensor 7 is installed along the inner wall surface 5c (see FIG. 10) facing the through hole 5b. After the PSD sensor 7 is slid in the direction away from the inner wall surface 5c after being inserted into the innermost part of the storage chamber 5a, the ear portion 7c of the sensor 7 is positioned in the positioning portion 5d of the storage chamber 5a as shown in FIG. Press against. As a result, the PSD sensor 7 is positioned in the front-rear direction and the lateral direction in the storage chamber 5a, so that the light source 7a and the semiconductor position detecting element 7b can be exposed to the corresponding through holes 5b. After that, by inserting the plate-like portion 4a of the holding portion 4 into the space along the inner wall surface 5c of the storage chamber 5a and fitting it, the PSD sensor 7 is also positioned in the vertical direction as shown in FIG. The sensor 7 is held at a predetermined position, and the holding portion 4 and the main body portion 5 are integrated, so that the assembly of the sensor housing 6 is also completed. Since the sensor housing 6 is formed to imitate a train, a plurality of blind holes 5e resembling the through holes 5b are formed in a row on the front and rear wall surfaces of the main body 5 in a row. These blind holes 5e, including the through holes 5b, play a role of visually imagining the train window, but the blind holes 5e themselves are unrelated to the detection mechanism of the detection device 1. Since the wooden sensor housing 6 imitating a toy train is mounted on the mounting base 3 in this way, the sensor housing 6 has an appearance like a decoration on the head-side frame 21 of the bed 20.

  Since the plurality of leg portions 4b projecting to the lower surface side of the sensor housing 6 are slidably fitted to the guide groove 3a of the mounting base 3 as described above, the sensor housing 6 extends along the guide groove 3a. Can be slid smoothly. Further, since the upward movement of the leg 4b is restricted by the guide groove 3a, the sensor housing 6 is prevented from being pulled upward. However, since the sensor housing 6 needs to be fixed on the mounting base 3 when the detection device 1 is used, the guide grooves 3a are formed on the left and right sides of the sensor housing 6 as shown in FIG. The stopper 8 is crimped to prevent the sensor housing 6 from sliding. That is, among the plurality of leg portions 4b of the sensor storage body 6, the stoppers 8 are arranged on the right side of the rightmost leg portion 4b and the left side of the leftmost leg portion 4b, respectively. By pressing the tool 8 against the guide groove 3a by its own elasticity, the leg portion 4b is prevented from sliding along the guide groove 3a.

  As shown in FIGS. 14 to 16, the stopper 8 is a trapezoidal bar-like body having a slit 8 a into which an elastic member 8 b such as rubber is fitted. The slit 8a is cut about half of the entire length of the stopper 8, and the interval between the forked thin-walled portions 8c and 8d across the slit 8a can be slightly narrowed by pressing and compressing the elastic member 8b. However, since the bifurcated thin portions 8c and 8d are pushed and spread on the elastic member 8b in the no-load state, the height of the stopper 8 is larger at the end on the slit 8a side than at the other end. In comparison with the height dimension of the guide groove 3a, the height dimension of the other end of the stopper 8 is set slightly smaller than the guide groove 3a, but the slit 8a side of the stopper 8 in the unloaded state. The height of the end is slightly larger than the guide groove 3a. Therefore, when the stopper 8 is attached to the guide groove 3a, after the stopper 8 is moved to a predetermined position of the guide groove 3a in a state where the elastic member 8b is pressed and compressed with a finger or the like, The applied pressure may be removed. By doing so, the compressed elastic member 8b swells and pushes the bifurcated thin-walled portions 8c, 8d, so that the stopper 8 can be pressed against the inner wall of the guide groove 3a by its own elasticity.

  The PSD sensor 7 is a known distance sensor that can measure the distance to the detected object by the triangulation method by detecting the light emitted from the light source 7a and reflected by the detected object by the semiconductor position detecting element 7b. It is. The PSD sensor 7 detects the presence / absence of an object to be detected at a specific location on the bed 20. In general, the cared person moves the upper body to a specific place on the bed and then gets out of the bed, so the head, upper body and legs are taken from the physical characteristics (data) measured at the time of entry such as the height and sitting height of the cared person. Appropriately tailored to the individual cared person by determining the area of the movable part necessary for getting up, such as the head and lower body, and arbitrarily setting a specific place in consideration of this area and the habits of the cared person Motion detection can be performed. For example, as shown in FIG. 1, the total length from the head side frame (head board) 21 to the foot side frame (foot board) 22 of the bed 20 to be used is 1800 mm, and side guards having a length of 600 mm on both the left and right sides. When two are attached at intervals of 600 mm, the cared person 15 uses a space sandwiched between two side guards 23 arranged on the right side of the bed 20 as a standard case. Therefore, the specific place in this case is a space having a length of 600 mm sandwiched between the two side guards 23. In this standard case, the PSD sensor 7 is disposed on the right side of the mounting base 3 fixed to the head side frame 21, and the detection range that can be covered by the PSD sensor 7 is 600 to 1200 mm from the head side frame 21. Preferably, it is 700 to 1100 mm, and the cancel range that cannot be detected by the PSD sensor 7 may be 600 mm behind the head-side frame 21 and 600 mm before the foot-side frame 22. Further, as a special case, when the cared person has a habit of taking out an object from a chase (not shown) arranged near the side guard 23 near the head-side frame 21, detection that can be covered by the PSD sensor 7 While extending the range from the head side frame 21 to 1200 mm, the cancel range that cannot be detected by the PSD sensor 7 may be 600 mm before the foot side frame 22. Alternatively, when the cared person has a habit of getting over the side guard 23 near the foot side frame 22, the detection range that can be covered by the PSD sensor 7 is extended from the head side frame 21 to 600 to 1800 mm, and the PSD sensor 7 The cancel range that cannot be detected may be 600 mm behind the head-side frame 21. In this way, if a specific place is arbitrarily set in accordance with the circumstances of the individual cared person to be detected, and the PSD sensor 7 is arranged so as to detect the presence or absence of the detected object in this specific place. Good. That is, in a normal time when the care receiver 15 is not going to leave the bed 20, there is no object to be detected that reflects the light of the light source 7a at the specific location, so the semiconductor position detecting element 7b places the object to be detected at the specific location. When detected, it can be determined that the detected body is the upper body of the cared person 15 during the bed leaving preparation operation. In the present embodiment, the sensor housing 6 that houses the PSD sensor 7 is arranged at the center in the longitudinal direction of the mounting base 3. In such a case, the detection accuracy can be improved by mounting the sensor housing 6 at a position near one end in the longitudinal direction of the mounting base 3 corresponding to the one side. Further, the mounting height of the mounting base 3 is preferably fixed to the vertical position by a mounting bracket in the range of 1/3 to 1/2 of the sitting height of the cared person 15, and set to such mounting height. Can improve the accuracy of motion detection.

  As shown in FIG. 3, the controller 9 is attached to a place that is not visible, such as the bottom of the bed 20. The output signal of the semiconductor position detecting element 7b of the PSD sensor 7 is input to the controller 9 via the cable 10, and the controller 9 determines whether or not the care receiver 15 is preparing for getting out of bed based on this output signal. It is supposed to be. Further, the controller 9 can output a notification signal, and when it is determined that the care receiver 15 is in the preparation for getting out of bed, the controller 9 can communicate with the nearest caregiver via a nurse call communication line or wireless communication. A notification signal can be sent to a nurse center or the like where there is.

  That is, the detection operation of the care receiver operation detection device 1 according to the present embodiment is as follows. First, in step S1, the PSD sensor 7 detects the object to be detected in a specific place on the bed 20, as shown in the flowchart of FIG. The presence or absence is detected, and a signal indicating the presence or absence of detection is output to the controller 9. In step S <b> 2, the controller 9 determines whether or not the care receiver 15 is performing the bed preparation operation based on the output signal from the PSD sensor 7. When the determination result of the controller 9 is “NO”, the process returns to step S1, but when the determination result is “YES”, the process proceeds to step S3, and a notification signal is reported from the controller 9 to the outside (for example, a nurse center).

  As described above, in the care receiver motion detection device 1 according to the present embodiment, whether or not the care receiver 15 is performing the bed leaving operation on the bed 20 is determined based on the output signal of the PSD sensor 7. 9 is judged. As described above, since the cared person generally moves the upper body to a specific place on the bed and then gets out of the bed, when the cared person 15 gets up on the bed 20 and starts the bed leaving operation, the cared person is usually covered. The upper body of the care receiver 15 is present at a specific location on the bed 20 where no detection object exists. Therefore, if the PSD sensor 7 detects the presence / absence of an object to be detected in this specific place, it is possible to detect the bed preparation operation of the care receiver 15. As a result, the controller 9 can instantly determine whether or not the care receiver 15 is preparing to get out of bed without performing complicated analysis processing, and to the nearest caregiver (nurse center or the like). Can be promptly notified.

  Further, in this care receiver motion detection device 1, the mounting base 3 is fixed to the head-side frame 21 of the bed 20, and the sensor housing 6 that houses the PSD sensor 7 is mounted on the mounting base 3. . And since these mounting base 3 and the sensor storage body 6 are formed in the appearance considered as a part or decoration of the bed 20, even if this detection apparatus 1 is newly installed in the existing bed 20, it does not stand out. There is no risk of being at least recognized as a surveillance camera or a suspicious object. Therefore, there is no possibility of causing discomfort or trouble to the cared person 15, and the carer can take care of the cared person 15 with a natural feeling when the cared person 15 returns to the bed 20.

  In addition, the care receiver motion detection device 1 is supported by the guide groove 3a of the mounting base 3 in an engaged state in which the sensor housing 6 housing the PSD sensor 7 is slidable along the width direction of the bed 20. When the PSD sensor 7 is placed at a desired position according to a specific place where the care receiver 15 performs the bed leaving operation, the leg 4b can be slid along the dovetail guide groove 3a. It is sufficient that the sensor housing 6 does not fall off. Moreover, the sensor housing 6 can be easily fixed by simply pressing the stopper 8 against the guide groove 3a by its own elasticity. Therefore, the detection apparatus 1 can perform the operation of arranging the PSD sensor 7 at a desired position very easily and is easy to use. Moreover, since this detection apparatus 1 is directly attached to the bed 20, it is difficult to be restricted by the environment around the bed 20, and even if the position of the bed 20 is changed, there is no need to newly attach it. The detection device 1 is easy to use.

  Further, in this care receiver motion detection device 1, since the response (responsiveness) is very fast and the high resolution and small PSD sensor 7 can detect the presence or absence of a detection object in a specific place on the bed 20, Accuracy and speed of notification can be improved. Moreover, since the PSD sensor 7 is a distance sensor, the detection range can be appropriately set according to the distance to a specific place on the bed 20 where the bed leaving operation is performed. Therefore, it is also possible to detect the caregiver's bed leaving preparation operation on the bed installed next to the bed 20 to which the detection device 1 is attached.

  Further, in this care receiver motion detection device 1, the sensor housing 6 accommodates the PSD sensor 7 and can position the main body 5, and the holding portion that can be fitted into the main body 5 and can hold the PSD sensor 7. 4, a through hole 5 b for projecting the light source 7 a of the PSD sensor 7 and the semiconductor position detecting element 7 b is formed in the main body 5, and a holding part that protrudes downward from the main body 5 The four leg portions 4b are engaged with the guide grooves 3a of the mounting base 3 so as to be slidable. Therefore, the sensor housing 6 having a simple structure that can be housed and held without impairing the function of the PSD sensor 7 and can smoothly slide along the guide groove 3a can be easily realized.

  The guide groove 3a is for guiding the sensor housing 6 along the width direction of the bed 20, but the same function may be realized by another guide means. For example, the sensor storage body 6 can be slidably engaged with a guide rail or a guide shaft provided on the mounting base 3.

  In the above embodiment, the main body 5 of the sensor housing 6 is formed to imitate a train, and a housing 5a for a PSD sensor (distance sensor) is provided only at the center. The storage chambers 5a may be provided at a plurality of locations to store a plurality of PSD sensors, or the sensor storage body 6 processed into an external shape other than the train. Further, as shown in the modification of FIG. 18, the sensor storage body 6 may be shortened by omitting the dummy portion where the storage chamber for the PSD sensor is not provided.

DESCRIPTION OF SYMBOLS 1 Care receiver movement detection apparatus 2 Mounting bracket 3 Mounting base 3a Guide groove (guide part)
DESCRIPTION OF SYMBOLS 4 Holding part 4a Plate-shaped part 4b Leg part 5 Main body part 5a Storage chamber 5b Through-hole 5d Positioning part 5e Blind hole 6 Sensor accommodating body 7 PSD sensor (distance sensor)
7a Light source (LED)
7b Semiconductor position detection element (PSD element)
8 Stopper 8a Slit 8b Elastic member 9 Controller (determination reporting means)
15 Care recipient 20 Bed 21 Head side frame 22 Foot side frame 23 Side guard

Claims (5)

The mounting base attached to the head side frame of the cared person's bed, the sensor storage body mounted on the mounting base, and the distance to the detected body housed in the sensor storage body and existing in a predetermined direction A distance sensor capable of outputting a signal corresponding to the distance sensor, and determining whether or not the care receiver is in the bed preparation operation based on the output signal of the distance sensor, and a notification signal when it is determined that the bed preparation operation is in progress A determination notification means for outputting,
The mounting base is provided with a guide portion extending along the width direction of the bed, and the sensor storage body is supported by the guide portion in an engaged state in which the sensor storage body is slidable in the extending direction. And a care receiver motion detecting device, wherein a stopper for preventing the sliding movement of the sensor housing is attached to the mounting base.   The care receiver motion detection device according to claim 1, wherein the distance sensor is a PSD sensor including a light source and a semiconductor position detection element.   The sensor storage body according to claim 2, wherein the sensor storage body is configured by combining a main body portion that can store and position the PSD sensor and a holding portion that is fitted in the main body portion and can hold the PSD sensor. A through-hole for allowing the light source and the semiconductor position detecting element to protrude from the main body is formed, and a part of the holding portion protruding outward from the main body can slide to the guide. The care receiver motion detection device characterized by being engaged with the device.   The guide part according to any one of claims 1 to 3, wherein the guide part is formed as a dovetail-shaped guide groove, and a leg part slidably fitted to the guide groove is provided in the sensor housing. A care receiver motion detection device, characterized in that it is protruded.   5. The care receiver motion detection device according to claim 4, wherein the stopper is crimped to the guide groove by its own elasticity.

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