JP2018108271A - Human body detection sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a human body detection sensor which can suppress load concentration on a load concentration part and can reduce breakage and line disconnection even when load is added to an external cable which is a wiring system.SOLUTION: A human body detection sensor includes: a pressure electrode capable of switching electric conduction and cutoff by human body pressure; a body part incorporating a signal cable conducting an electric signal from the pressure electrode; a cable exposure part projecting from an opening of the body part in a signal cable; a case connected to the body part at the opening; and an external cable electrically connected to the cable exposure part inside the case. The external cable is engaged with the case at the connection part on an end surface opposite the body part in the case, and stress added to the external cable is scattered both to the external cable and to the case at the connection part.SELECTED DRAWING: Figure 1

Description

  The present invention is a human body detection sensor for detecting a user on a bed, chair, floor, etc. used by a user such as a patient or a care recipient such as a hospital, a nursing facility, an elderly facility, etc. The present invention relates to an enhanced human body detection sensor.

  In recent years, many countries including Japan are aging. As the population ages, the number of inpatients due to illness and injury increases, and the number of people who need care needs to increase due to aging. Inpatients and care recipients are often hospitalized or entered hospitals, nursing homes, elderly facilities, etc., and spend a lot of time in bed depending on their medical condition and care status. Or you may spend a lot of time on a wheelchair or nursing chair.

  The physical exercise ability of patients and care recipients who spend a lot of time in bed and chairs is declining. Due to this decline, there is a danger of falling from the bed or chair. The user may voluntarily get off the bed or chair and move to the next action as necessary. There is no problem with the user getting off the bed or chair voluntarily.

  However, as described above, the physical ability of the user has declined, and the user may fall from the bed or chair. Or the user may have caused a decline in cognitive ability. In this case, the person may get off the bed or chair due to unconsciousness or habitual behavior, not spontaneously or consciously.

  As described above, there is a risk that a user such as a patient or a care recipient may unconsciously get off or fall from the bed or chair. Or, mental instability can cause unpredictable movement on a bed or chair. In this case, a strange operation is performed on the bed or chair, or an operation such as returning from the bed or chair to the floor and returning.

  Such unconscious behavior, falling, and incomprehensible motion cause danger to the body of a user such as a patient or a care recipient. Or, there is a possibility that a third party may cause a problem due to drought or the like.

  In hospitals, care facilities, and elderly facilities, it is necessary to detect such dangers and unpredictable behaviors of patients and care recipients to prevent injuries and accidents. This is because if an injury or accident occurs, it may be a problem of compensation or a decrease in the reliability of a hospital or nursing facility. However, it is not realistic to monitor each patient and care recipient in terms of securing human resources and costs. Of course, it is not realistic for a care worker to monitor a patient or a person to be cared for along with the care work in terms of work efficiency and securing human resources.

  In this way, in the field of medical care and nursing care that is already becoming a huge industry, it is required to predict the risk for patients and care recipients in a balanced manner with human resources and budgets.

  In such a situation, various techniques have been proposed for detecting a sitting or sitting state in a bed or a seat (for example, see Patent Documents 1 to 3). These have proposed a technique for automatically detecting whether or not a person is sitting on a bed or a seat or getting up.

JP-A-6-315424 JP 7-237487 A JP 2006-73522 A

  Patent document 1 arranges a plurality of temperature sensors and humidity sensors on the seat surface of a bed, detects body temperature and humidity of a sleeping person, and blows air inside the bed so as to maintain the comfortable state of the sleeping person. A bed apparatus is disclosed. In other words, the technology disclosed in Patent Document 1 can estimate the comfort / discomfort level of a sleeping person based on the temperature and humidity that can be detected by the bed apparatus, and can provide a comfortable sleeping environment for the sleeping person.

  Patent Document 2 discloses an occupancy detection device that detects whether or not an occupant is seated by a pressure-sensitive element attached to the back of the seat.

  Patent Document 3 discloses a flexible surface switch characterized in that a plurality of holes are provided in an insulator and electrodes of a flexible surface conductor are provided on both surfaces of the insulator. Patent document 3 implement | achieves a surface switch by the combination of the insulator which has a hole, and the electrode which can contact this insulator. Such a surface switch can be applied to a biological sensor that detects a human body by being installed in a bed or a seat. Of course, human bodies (including animals) can be detected not only on beds and seats but also on the floor. In addition, unlike Patent Documents 1 and 2, the surface switch has flexibility, so even when it is installed in a bed or seat, it is easy to cope with the curved surface and movement of the human body, and the current change due to pressure by the human body Easy to detect.

  Patent Documents 1 to 3 each aim to detect whether or not a human body is seated using a sensor.

  Here, the human body detection devices of Patent Documents 1 to 3 need to include a signal line for outputting a signal from a sensor (such as an electrode) provided in a portion in contact with the human body to the detection device or the alarm device. This signal line includes wired and wireless.

  When the signal line is wireless, it is necessary to convert the signal detected by the sensor into a wireless signal and transmit it to a detection device or an alarm device. However, in the case of wireless communication, there is a possibility that an error may occur in transmission of the detected signal or a reception failure may occur. If there is such an error or reception failure, there is a problem that human body detection cannot be performed reliably.

  Corresponding to such a wireless problem, a wired signal line may be used. In this case, the signal cable coming out of the main body part of the human body detection sensor (the part that receives the pressure of the human body with the built-in sensor and electrode) is connected to the external cable through the case.

  FIG. 6 is a front view of a human body detection sensor in the prior art. The human body detection sensor 100 includes a main body portion 110 and a case 120. A sensor and electrodes for detecting the pressure of the human body and a signal cable 130 for outputting detection signals from the sensors and electrodes to the outside are built in the main body 110.

  The signal cable 130 protrudes from the main body portion 110 and is connected to the case 120. In this case 120, the signal cable 130 exists as an exposed cable 131 protruding from the main body portion 110. The exposed cable 131 is connected to the external cable 140 inside or outside the case 120. The external cable 140 is connected to a detection device or an alarm device on the side opposite to the human body detection sensor 100.

  Thus, in the case of the wired system, the signal cable 130 built in the main body portion 110, the exposed cable 131 that is a portion protruding from the main body portion 110 to the case 120, and the exposed cable 131 are connected to the case 120. A configuration for realizing a signal transmission path of the external cable 140 is provided.

  Here, the human body detection sensor 100 is installed in a place that comes into contact with the human body, such as a bed seat, a chair seat, or a floor. In addition, contact and separation with the human body are repeated. Due to the nature of being used in hospitals and nursing care facilities, many related persons go around the human body detection sensor 100. Alternatively, the human body detection sensor 100 is repeatedly moved and replaced.

  For this reason, in the human body detection sensor 100, many loads are easily applied to the connected external cable 140. Since the external cable 140 is a long tube-like object, loads from various directions to various directions are applied.

  Here, there are the following two load concentration portions between the external cable 140 and the signal cable 130.

(1) Connection portion between external cable 140 and exposed cable 131 (2) Portion where signal cable 130 protrudes from main body portion 110

  When various loads are applied to the external cable 140, there is a problem that a large load accumulates in these two load concentrated portions. As the load accumulates, there is a problem that these load concentrated portions are broken or disconnected.

  The human body detection sensor malfunctions due to breakage or disconnection, and the administrator cannot check the state of the patient or the person to be cared for. Damage and disconnection are difficult to understand from the exterior and lead to problems that make it difficult for the administrator to manage the user.

  Alternatively, there is a problem that a repair or replacement is required, which causes a large cost burden on the administrator. In the case of a structure in which the signal cable 130 built in the main body 110 is integrated as an external cable and connected to a detection device so as not to cause a load concentration part, human body detection is performed when a part of the external cable is damaged. There is also a problem that the entire sensor 100 must be replaced.

  As described above, the wired human detection sensor has a problem in that the load applied to the external cable 140 concentrates on the load concentration portion and causes damage or the like. Due to this damage and the like, there has been an error in the management of the user by the human body detection sensor, leading to problems such as an increase in the burden and cost of the administrator.

  In view of the above problems, the present invention provides a human body detection sensor that is a wired system and can reduce damage and disconnection by suppressing load concentration on a load concentration portion even when a load is applied to an external cable. With the goal.

In view of the above problems, the human body detection sensor of the present invention has a pressure electrode that can be switched between energization and cutoff by the pressure of the human body, a main body portion that incorporates a signal cable that conducts an electrical signal from the pressure electrode, and
A cable exposed portion that is a portion protruding from the opening of the main body in the signal cable; and
A case connected to the main body at the opening;
An external cable electrically connected to the cable exposed portion in the case,
The external cable is fitted to the case at the connection part on the end surface opposite to the main body in the case.
The stress applied to the external cable is distributed to both the external cable and the case at the connection portion.

The human body detection sensor of the present invention can output a signal from an electrode built in the main body to an external cable in a wired manner. By using the wired system, signals from the electrodes do not become output errors or reception errors.
Further, it is possible to suppress the concentration of the load on the load concentration portion where the load is concentrated by the load applied to the external cable. Furthermore, even when a load is applied, the ability to cope with the load is high, and damage and wear can be reduced.
As a result, it can be used with high durability over a long period of time. As a result, it is possible to reduce the burden on the manager who manages the sick person and the care recipient.

It is a whole front view of the human body detection sensor in an embodiment of the invention. It is an enlarged view near the case of the human body detection sensor in the embodiment of the present invention. 3 is a schematic diagram of an example of a pressure electrode 21. FIG. It is a front view of the case vicinity in embodiment of this invention. It is a use perspective view of a human body detection sensor in an embodiment of the invention. It is a front view of the human body detection sensor in a prior art.

A human body detection sensor according to a first aspect of the present invention includes a pressure electrode that can be switched between energization and cutoff according to the pressure of the human body, a main body portion that incorporates a signal cable that conducts an electrical signal from the pressure electrode,
A cable exposed portion that is a portion protruding from the opening of the main body in the signal cable; and
A case connected to the main body at the opening;
An external cable electrically connected to the cable exposed portion in the case,
The external cable is fitted to the case at the connection part on the end surface opposite to the main body in the case.
The stress applied to the external cable is distributed to both the external cable and the case at the connection portion.

  With this configuration, it is possible to reduce the concentration of stress on a portion that is difficult to break, such as a connection portion between an external cable and a cable exposed portion.

  In the human body sensor according to the second aspect of the present invention, in addition to the first aspect, the connecting portion serves as a common fulcrum for the external cable and the case, and the external cable is fitted at the common fulcrum with the case.

  With this configuration, the connection is made at a common fulcrum and the load is hard to work.

  In the human body sensor according to the third invention of the present invention, in addition to the first or second invention, the connection portion is a fitting groove provided in the case, and the fitting corresponding portion of the external cable is fitted. The external cable and the case are connected by fitting with the groove.

  With this configuration, the external cable is fixedly connected to the case. By being fixedly connected, the load applied to the external cable can be concentrated on the connecting portion and received by the entire case.

  In the human body sensor according to the fourth aspect of the present invention, in addition to any one of the first to third aspects, the load applied to the external cable is transmitted to the case through the connecting portion.

  With this configuration, stress is dispersed in the case.

  In the human body sensor according to the fifth aspect of the present invention, in addition to the third aspect, the fitting groove is along the width direction of the external cable, and the movement of the portion inside the case can be suppressed in the external cable. .

  With this configuration, the part that accommodates the external cable is fixed inside the case, and an extra load is hardly applied to the external cable and the cable exposed part.

  In the human body sensor according to the sixth aspect of the present invention, in addition to any of the first to fifth aspects of the invention, the case is connected to the main body portion by the side surface of the main body portion and two or more fixing portions. Yes.

  With this configuration, the case is fixed to the main body portion, and is difficult to be damaged at the connection portion with the main body portion due to the movement of the case.

  In the human body sensor according to the seventh aspect of the present invention, in addition to any of the first to sixth aspects, the cable exposed portion and the external cable are detachably connected inside the case.

  With this configuration, the external cable can be removed.

  In the human body sensor according to the eighth aspect of the present invention, in addition to the seventh aspect, the cable exposed portion and the external cable are detachably connected by any of a screw, a crimp terminal, and an uneven connector.

  This configuration makes it easy to attach and detach.

  In the human body sensor according to the ninth aspect of the present invention, in addition to any one of the first to eighth aspects, the case includes a partition located outside the cable exposed portion.

  With this configuration, the connection portion between the external cable and the cable exposed portion is protected. Furthermore, waterproofing and drip-proofing effects are produced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  (Embodiment)

(Overview)
As described in the prior art, in the human body detection sensor, the load applied to the external cable concentrates on (1) the connection portion between the external cable and the exposed cable, and (2) the portion where the signal cable protrudes from the main body portion.

  The overall outline will be described with reference to FIGS. FIG. 1 is an overall front view of a human body detection sensor according to an embodiment of the present invention. FIG. 2 is an enlarged view of the vicinity of the case of the human body detection sensor according to the embodiment of the present invention. FIG. 2 shows the inside of the case as a visible state. In addition, elements included in the main body are shown on the assumption that they are not visible.

  The human body detection sensor 1 detects increase / decrease (pressure state or disappearance state) of the human body by the presence or separation of the human body in various places such as a bed, a chair, a sofa, a floor surface, and the like. Whether the human body is present or not can be detected by the increase or decrease of the human body pressure. The human body detection sensor 1 includes a main body 2. Inside the main body 2, a pressure electrode 21 that can be switched between energization and cutoff by the pressure of the human body and a signal cable 3 that conducts an electric signal from the pressure electrode are incorporated.

  Since the main body 2 is installed on the seat surface of a bed or chair, the human body detection sensor 1 can receive an increase or decrease in pressure of a patient sleeping on the bed, a care recipient or the like. For example, it can be energized when receiving pressure, and a current signal generated by energization can be output via the signal cable 3. By receiving this current signal, it can be confirmed that the patient or the care recipient is sleeping in the bed. Conversely, when a current signal that is not energized but in a cut-off state is obtained, it can be determined that the patient or care recipient is away from the bed.

  Similarly, when the main body 2 is installed on the seat surface of the chair, it is reliable and easy to determine whether the patient or care recipient (of course, other people) is sitting or absent from the chair. Can be determined. Or when the main-body part 2 is installed in the floor surface, it can be determined whether the person passed the floor surface. For example, when the main body 2 is installed beside the bed, it can be determined that a patient or a care recipient who has been in the bed has moved down the bed.

  In this way, the body part 2 has a pressure electrode that can be switched between energization and interruption by the pressure of the human body, so that human body detection can be performed in places and scenes where it is necessary to reliably detect the presence or absence of the human body. Sensor 1 can be used.

  Here, the human body detection sensor 1 includes a main body 2, a pressure electrode 21 built in the main body 2, a signal cable 3, a cable exposed portion 31, a case 4, and an external cable 5.

  The main body 2 is a main body installed in a place where it is necessary to detect the pressure of the human body, and may be formed of a flexible material so that it can be easily installed. For example, it may be formed of a material such as soft resin, polyethylene resin, vinyl, synthetic resin, or synthetic leather. Due to the flexibility and the ease of deformation, even when installed on a bed, a chair, a seating surface of the floor, etc., it is difficult to give discomfort to the human body while appropriately receiving the pressure of the human body.

  The pressure electrode 21 is provided inside the main body 2 and can be switched between energization and interruption in response to the pressure of the human body. For example, when a human body pressure is applied, the pressure electrode 21 is energized, and when the human body pressure decreases or disappears, the pressure electrode 21 is in a cut-off state (insulated state).

  FIG. 3 is a schematic diagram of an example of the pressure electrode 21. The pressure electrode 21 includes a first electrode 201 on one side in the plane of the main body 2, a second electrode 202 on the other side, a region dividing member 204 and a conductor 203 therebetween. In FIG. 3, each member is shown separately for easy viewing, but is actually accommodated with a certain degree of adhesion inside the main body 2. Moreover, these members are on a plane according to the shape of the main body 2 on the plane, and these members are accommodated in a plane in the main body 2 on the plane.

  When a human body pressure is applied to the main body 2, the distance between the first electrode 201 and the second electrode 202 is reduced and the body portion 2 is in close contact. At this time, there is a conductor 203 and a region dividing member 204 between the first electrode 201 and the second electrode 202. The first electrode 201 and the second electrode 202 are conductive, and the conductor 203 is also It is conductive. On the other hand, the region dividing member 204 is a member composed of a conductive gap and an insulating remainder.

  When the respective members are brought into close contact with each other in this configuration, the first electrode 201, the conductor 203, and the second electrode 202 are energized in the gap portion of the region dividing member 204. With this energization state, the energized electrical signal is output to the signal cable 3 connected to the first electrode 201 and the second electrode 202. The signal cable 3 outputs an electrical signal indicating an energized state.

  On the other hand, when the human body pressure is not applied to the main body 2 or only a very small pressure is applied, the conduction of the first electrode 201, the second electrode 202 and the conductor 203 between them is divided into regions. It is blocked by the insulating remainder of the member 204. As a result, the pressure electrode 21 is cut off, and an electric signal indicating the cut off state is output to the signal cable 3.

  The signal cable 3 is built in the main body 2 together with the pressure electrode 21. The signal cable 3 is connected to the pressure electrode 21 as shown in FIG. 3, and the signal cable 3 is built in the main body 2 in various modes according to the shape and form of the pressure electrode 21. The signal cable 3 outputs an electrical signal when the pressure electrode is energized or interrupted (including the middle thereof).

  The signal cable 3 is built in the main body 2, but needs to be exposed from the main body 2 in order to output an electric signal from the pressure electrode 21 to an external device that determines the state of the human body (going outside). There is a need). The main body 2 includes an opening 22, and a part (tip) of the signal cable 3 goes out of the main body 2 from the opening 22. A portion exposed to the outside from the opening 22 is a cable exposed portion 31.

  The case 4 is connected to the main body 2 at the opening 22. The case 4 houses a structure that connects the cable exposed portion 31 and the external cable 5 described above. The connection portion between the cable exposed portion 31 and the external cable 5 is in an electrically exposed state. For this reason, adhesion of moisture is not preferable. Or it is not preferable that a direct impact or contact is applied. The case 4 prevents adhesion of dirt while preventing such adhesion of moisture, direct impact and contact.

  In the case 4, the external cable 5 is electrically connected to the cable exposed portion 31. With this electrical connection, the external cable 5 and the signal cable 3 are electrically connected. In other words, an electrical signal obtained by the signal cable 3 from the pressure electrode 2 is output to the external cable 5.

  The external cable 5 is fitted to the case 4 at the connection portion 7 on the end surface opposite to the main body portion 2 in the case 4. When the external cable 5 is fitted to the case 4 at the connection portion 7, the external cable 5 is fixed to the case 4 with the connection portion 7 as a base point.

  By fixing the external cable 5 to the case 4, the main body 2 to which the case 4 is connected is also properly connected. That is, the external cable 5 does not hang around and is not fixed in the vicinity of the outlet (opening 22) from the main body 2, the connection portion with the cable exposed portion 31, or the outlet portion from the case 4. In other words, it is not in an unstable state.

  As described in the prior art, when the external cable 5 is connected to the signal cable 3 via the cable exposed portion 31, an electric signal is output to the outside, and detection by the human body detection sensor 1 can be determined. At this time, as described in the related art, the external cable 5 is likely to be subjected to loads such as vibration, shaking, and movement. Due to this load, stress was easily applied to (1) the connection portion between the external cable and the exposed cable, and (2) the portion where the signal cable protrudes from the body portion.

  However, in the human body detection sensor 1 in the embodiment, the stress applied to the external cable 5 is distributed to both the external cable 5 and the case 4 at the connection portion 7. In other words, the stress concentrates on the connection portion 7, is transmitted to the case 4, and is dispersed in the case 4. Also distributed to the external cable 5. The concentrated stress is dispersed in the case 4 and the external cable 5 having a high structural force after concentrating on the connection portion 7 that is not a weak portion such as a cable connection portion but a structural body. Hard to occur.

  That is, (1) the connection portion between the external cable and the exposed cable, and (2) it is difficult to concentrate on a physically connected portion such as a portion where the signal cable protrudes from the main body portion or a portion with low durability such as a protruding portion.

  The external cable 5 and the case 4 are structures having a certain size and strength, and can maintain sufficient durability even when stress is concentrated. As a result, it is possible to prevent stress from concentrating on the part that has been a problem in the prior art, and it is easy to prevent disconnection or breakage. As a result, cable replacement, human body sensor replacement, or extensive repairs can be reduced. Of course, malfunctions and detection errors can also be prevented.

(Details of each part)
The connection portion 7 serves as a common fulcrum for the external cable 5 and the case 4. The tip of the arrow A in FIG. 2 indicates the position serving as the fulcrum. The external cable 5 is fitted and connected to a connecting portion 7 provided on the end surface of the case 4. At this time, the connecting portion 7 serves as a common fulcrum for the external cable 5 and the case 4. That is, the external cable 5 is connected to the case 4 at this common fulcrum.

  As a result, the stress caused by the vibration or load applied to the external cable 5 is concentrated on the connection portion 7. It becomes difficult to concentrate on the connection portion between the external cable 5 and the cable exposed portion 31, the connection portion between the case 4 and the main body portion 2, and the like. The stress concentrated on the connection portion 7 is received by the case 4. As a result, the stress applied to the external cable 5 is concentrated on the connection portion 7. The connecting portion 7 is a part of the case 4 and the case 4 receives this concentrated stress.

  Since the case main body 4 is a member having a sufficient size and shape, even if stress is concentrated on these, the case main body 4 is unlikely to be damaged such as disconnection. As a result, conventional problems can be solved.

  Here, the connecting portion 7 is a fitting groove provided in the case 4, and the external cable 5 and the case 4 are connected by fitting the fitting corresponding portion of the external cable 5 into the fitting groove. Is done. The external cable 5 and the case 4 are reliably connected by such fitting by the fitting groove.

  In addition to the connection, it is also fixed.

  Due to the connection by such a fitting groove, the connection fixing force between the external cable 5 and the case 4 is increased, and the connection portion 7 tends to be a stress concentration part. In addition to being easy to become, the concentration degree of stress increases.

  In addition, the relative positional relationship (connected position) between the external cable 5 and the case 4 is difficult to change, and even when a load is applied to the external cable 5, the stress due to the load is concentrated on the connection portion 7. Thus, it is possible to prevent concentration on other portions of the external cable 5, connection portions with the cable exposed portion 31, and the like. The fact that the positional relationship does not change naturally has a high merit in usability.

  When the external cable 5 is fitted and fixedly connected to the case 4 at the connection portion 7, the load applied to the external cable 5 is transmitted to the case 4 through the connection portion 7. Thus, the load applied to the external cable 5 is transmitted to the case 4, so that the case 4 can receive the load applied to the external cable 5 as a whole. As a result, the stress due to vibration or vibration applied to the external cable 5 is less likely to be concentrated on easily damaged parts such as (1) the connection part between the external cable and the exposed cable, and (2) the part where the signal cable protrudes from the main body part. Become.

  (Mating groove)

  The connection portion 7 is preferably provided with a fitting groove. This is because the external cable 5 is securely fixed at the connection portion 7 by fitting with the fitting groove. Further, there is an advantage that it is easy to connect the external cable 5 and the case 4 at the connection portion 7. Since it is a fitting groove, it can also be removed, and if necessary, the external cable 5 can be removed from the fitting groove.

  Here, the fitting groove is also preferably along the width direction of the external cable 5. By being in a state along the width direction, when the external cable 5 is fitted, the external cable 5 is fitted in the width direction. As shown in FIG.

  By fitting and fixing in the width direction, the movement of the external cable 5 inside the case 4 can be suppressed. A part of the external cable 5 is accommodated inside the case 4. The portion accommodated in the case 4 is difficult to move because the external cable 5 is fixed in the width direction. As a result, the movement of a part of the external cable 5 inside the case 4 is suppressed, and the concentration of stress on the connection portion 41 between the external cable 5 and the cable exposed portion 31 can be suppressed.

  (Connection between case and main body)

  The case 4 is connected to the main body 2. At this time, it is preferable that the case 4 is connected to the main body 2 by the side surface of the main body 2 and two or more fixing portions.

  In FIG. 1, a case 4 is connected to the side surface of the main body 2. In particular, it is also suitable to be connected to the side surface of the main body 2 in the longitudinal direction. This is because the stress transmitted from the external cable 5 to the case 4 by being connected to the side surface in the longitudinal direction is received by the wide side surface in the longitudinal direction.

  As shown in FIG. 2, the case 4 is connected to the main body 2 by two fixing portions 42. By being fixed by two or more fixing portions 42, the case 4 is difficult to be separated from the main body portion 2, and the coupling force is increased. Further, since the stress is also dispersed, the problem at the stress concentration portion, which has been a problem in the prior art, hardly occurs.

  Of course, since there are two or more places, the case 4 may be connected to the main body 2 by three or more fixing parts 42.

  The fixing part 42 may be constituted by a screw or an adhesive. Of course, other means may be used.

  (Connection between external cable and exposed cable part)

  In the case 4, the external cable 5 and the cable exposed portion 31 are connected. As described above, the cable exposed portion 31 is a portion where the signal cable 3 accommodated in the main body portion 2 protrudes from the main body portion 2.

  By electrically connecting them, the electric signal output from the signal cable 3 can be output to the determination device or the like through the external cable 5.

  Further, since the external cable 5 and the cable exposed portion 31 are connected inside the case 4, there is an advantage that the electrical connection portion is protected from the outside. Further, since the load applied to the external cable 5 is transmitted to the main body of the case 4, there is an advantage that it is difficult to transmit to the internal cable exposed portion 31. In particular, the connecting portion is a place that is easily damaged by stress, but this can be easily prevented.

  It is also preferable that the external cable 5 and the cable exposed portion 31 are detachably connected. By being detachable, it is possible to cope with a case where the external cable 5 is to be exchanged. Not only the replacement due to the damage of the external cable 5, but also the case where it is desired to change the length and type of the external cable, for example.

  Further, since the external cable 5 can be removed, there is an advantage that the human body detection sensor 1 can be easily carried.

  Here, the external cable 5 and the cable exposed portion 31 are connected to each other by screws, so that they can be detachably connected. Of course, it may be detachably connected by means other than screws. For example, it may be connected by a crimp terminal or a concavo-convex connector other than a screw.

(Partition wall)
It is also preferable that the case 4 is provided with a partition wall 45 located outside the cable exposed portion 31. The partition wall 45 is configured to fit inside the case 4 and shield the outside of the cable exposed portion 31. This aspect is illustrated in FIG.

  Due to the presence of the partition wall 45, the connection portion between the cable exposed portion 31 and the external cable 5 is protected inside the partition wall 45. This form further protects the connection portion.

  In addition, inside the case 4, the inner side of the case 45 becomes the cable exposed portion 31 and the connection portion thereof, and the outer side of the partition wall 45 becomes the external cable 5, and the movement of the external cable 5 affects the connection portion. There are also no merits.

(Usage mode)
The human body detection sensor 1 described above is used as shown in FIGS. FIG. 4 is a front view of the vicinity of the case in the embodiment of the present invention. FIG. 5 is a perspective view of the use of the human body detection sensor according to the embodiment of the present invention.

  The case 4 is closed with a lid as shown in FIG. The inside is sealed by the closed state, and the cable exposed portion 31 and the like inside are sealed. In addition, it can protect against external impact and pressure.

  As shown in FIG. 5, the human body detection sensor 1 is installed on a bed, a seat surface of a chair, a floor surface, or the like, and detects the presence or absence of a human body. By detecting, for example, it is possible to remotely grasp the absence of the patient, or to prevent wrinkles of the care recipient.

  The human body detection sensor described in the embodiment is an example for explaining the gist of the present invention, and includes modifications and alterations without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Human body detection sensor 2 Main part 3 Signal cable 31 Exposed cable part 4 Case 5 External cable 7 Connection part

Claims (9)

A pressure electrode capable of switching between energization and interruption according to the pressure of the human body, and a main body portion incorporating a signal cable for conducting an electrical signal from the pressure electrode;
A cable exposed portion that is a portion protruding from the opening of the main body in the signal cable;
A case connected to the main body at the opening;
An external cable electrically connected to the cable exposed portion in the case, and
The external cable is fitted to the case at the connection portion on the end surface opposite to the main body in the case,
The human body detection sensor in which stress applied to the external cable is distributed to both the external cable and the case at the connection portion.   The human body detection sensor according to claim 1, wherein the connection portion serves as a common fulcrum for the external cable and the case, and the external cable is fitted at a common fulcrum with the case.   The connection part is a fitting groove provided in the case, and the external cable and the case are connected by fitting the fitting corresponding part of the external cable with the fitting groove. The human body detection sensor according to claim 1 or 2.   The human body detection sensor according to claim 1, wherein a load applied to the external cable is transmitted to the case through the connection portion.   The human body detection sensor according to claim 3, wherein the fitting groove is along a width direction of the external cable, and movement of a portion inside the case in the external cable can be suppressed.   The human body detection sensor according to claim 1, wherein the case is connected to the main body by a side surface of the main body and two or more fixing portions.   The human body detection sensor according to claim 1, wherein the cable exposed portion and the external cable are detachably connected inside the case.   The human body detection sensor according to claim 7, wherein the cable exposed portion and the external cable are detachably connected by any one of a screw, a crimp terminal, and an uneven connector.   The human body detection sensor according to claim 1, wherein the case includes a partition wall located outside the exposed portion of the cable.