Helmet

Abstract

To provide a wearable device that makes a wearable device washable with water, possible to prevent a sensor from deteriorating a detection accuracy due to odor and dirt of the wearable device and sweat, and possible to absorb sweat by a covering material.SOLUTION: A helmet 6 includes a biological information acquisition unit 21 which is a sensor for detecting a state of a user, and a covering material 11 for covering a detection unit of the sensor. The sensor is provided on the covering material 11 and detects the state of the user through the covering material 11, and the covering material 11 is provided detachably from the helmet 6.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a Helmet equipped with a sensor.

Background Art

[0002] Conventionally, an information management system has been proposed in which wearable devices (portable devices) such as helmets equipped with various sensors are connected via a network (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Patent Document 1 described above discloses a technique of attaching a biometric information sensor for detecting a user's body temperature or the like to the headband of a helmet. However, in this method, since the sensor is attached to the headband in a non-detachable manner, the headband cannot be washed with water. This has caused odors and dirt on the headband and has also been a factor in the deterioration of the detection accuracy of the sensor due to sweat. In addition, since the headband is always in contact with the forehead, there has been a problem of stuffiness due to sweat.

[0005] The present invention has been made in view of the above problems, Helmet and by making the sensor detachable via a coating material with respect to Helmet it is possible to wash it with water, Helmet prevent odors and dirt on Helmet and deterioration of the detection accuracy of the sensor due to sweat, and also absorb sweat with the coating material,

Means for Solving the Problems

[0006] In order to solve the above problems, the present invention comprises the following Helmet .

[0007] (1) A Head worn and used by a user Helmet comprising a sensor for detecting the state of the user, a covering material for covering the detection part of the sensor, and a Helmet fixed to the Head of the user Headband , wherein the covering material is detachably provided with respect to the Front part of the headband and A cloth-like member, the sensor is provided on the covering material and detects the Frontal skin temperature of the user through the covering material, The detection part of the sensor is detachably attached to the surface of the covering material on the side opposite to the surface exposed to the user side, and the covering material is wound around the front part of the headband so that the surface provided with the detection part faces inward, and at least a part of the end of the covering material and the other part of the covering material are opposed to each other and engaged or disengaged from each other, so that it is detachably attached to the front part of the headband. Helmet .

[0008] (2) The Headband has a tightening mechanism. The helmet according to (1) .

[0009] (3) The covering material is made of a conductive material such as mesh fabric, foamed polyurethane, or silver fiber a breathable material. (1) or (2) as described in Helmet .

[0010] (4) The covering material is a mesh fabric, and the sensor detects the body temperature of the user. Any one of (1) to (3) as described in Helmet .

[0011] (5) Judging the risk of heat stroke of the user from the detection result by the sensor. Any one of (1) to (4) as described in Helmet .

[0012] (6) The sensor is detachably provided with respect to the covering material. Any one of (1) to (5) as described in Helmet .

Advantages of the Invention

[0013] According to the Helmet of the present invention,Helmet By making the sensor detachable via a covering material with respect to Helmet , Helmet it can be washed with water, Helmet it is possible to prevent the smell, dirt of Helmet , and the deterioration of the detection accuracy of the sensor due to sweat, and it is possible to absorb sweat with the covering material.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0015] Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In each figure, components with the same reference numerals are shown to be the same components, and the description thereof will be omitted. FIG. 1 is a block diagram showing the configuration of the mutual monitoring system 1 in which a helmet 6 which is an example of the wearable device according to the present embodiment is used, FIG. 2 is a block diagram showing the specific configuration of the detection unit 2 etc., and FIG. 3 is a side view showing the helmet 6 worn by a user (hereinafter simply referred to as "user") of the mutual monitoring system 1.

[0016] As shown in FIG. 1, the mutual monitoring system 1 is composed of monitoring units U carried by a plurality of users respectively. When an abnormality (in this embodiment, an increase in the risk of heatstroke) occurs to any of the users, the mutual monitoring system 1 is configured to notify the users of the mutual monitoring system 1 of the occurrence of the abnormality and the user in whom the abnormality has occurred. Note that the abnormality of the user detected by the mutual monitoring system 1 is not limited to an increase in the risk of heatstroke, and it is also possible to configure it to detect other physical discomfort or the like.

[0017] In FIG. 1, monitoring units U1 to U4 carried by four users are shown. In the mutual monitoring system 1, it is sufficient that there are a plurality of users and monitoring units U, and the number thereof is not limited. The monitoring unit U in this embodiment is configured as a helmet 6 which is an example of a wearable device worn by the user, as shown in FIG. 3. Since each monitoring unit U has the same configuration and function, hereinafter, the monitoring unit U1 will be described, and detailed descriptions of the other monitoring units U2 to U4 will be omitted.

[0018] As shown in FIG. 1, the helmet 6 constituting the monitoring unit U1 includes a detection unit 2, a communication unit 4, a notification lamp 7 which is a first notification unit, and a specific lamp 8 which is a second notification unit. The detection unit 2 and the communication unit 4 are housed inside a case C provided in the helmet 6 as shown in FIGS. 3 to 5. The detection unit 2 detects an abnormality of the user carrying the monitoring unit U1. The communication unit 4 transmits and receives abnormality occurrence information indicating that an abnormality has occurred to any of the users via a communication line 10 or the like. The notification lamp 7 which is a first notification unit notifies the user carrying the monitoring unit U1 that an abnormality has occurred to any of the users. The specific lamp 8 which is a second notification unit notifies the surrounding people that an abnormality has occurred to the user carrying the monitoring unit U1 and identifies the person in whom the abnormality has occurred.

[0019] As shown in FIGS. 1 and 2, the detection unit 2 includes a biological information acquisition unit 21, an environmental information acquisition unit 22, and a monitoring control unit 3. The biological information acquisition unit 21 and the environmental information acquisition unit 22 are various sensors provided in the helmet 6 and configured to detect data related to the user's biological information and environmental information. The biological information acquisition unit 21 is provided with a wiring 21a as shown in FIGS. 3 to 6, and is connected to the detection unit 2 in the case C via this wiring 21a. The case C is detachable from the helmet 6. The monitoring control unit 3 is a control unit in which an application program (heat stroke risk calculation program) is installed. The heat stroke risk calculation program is stored in a storage unit included in each component of the monitoring control unit 3.

[0020] As shown in FIG. 3, the biological information acquisition unit 21 and the environmental information acquisition unit 22 are provided in a helmet 6 worn on the head of a user, such as a worker working in a factory, a construction site, or a mountain forest. Note that, as a wearable device, it is also possible to adopt other articles different from the helmet 6 (for example, a hat, a wristband, a watch, glasses, a necklace, a belt, a bag, shoes, clothing, underwear, a diaper, etc.) worn by the user. In a situation where a large amount of sweat is produced under high temperature conditions, it is preferable to adopt the helmet 6, which has a problem of stuffiness, as a wearable device.

[0021] As shown in FIGS. 3 to 5 in the present embodiment, the biological information acquisition unit 21 is provided in a covering material 11 attached to the front part of the headband 61 of the helmet 6. The biological information acquisition unit 21 acquires the user's biological information at predetermined measurement times. The biological information acquisition unit 21 in the present embodiment is a skin surface temperature sensor that measures the forehead skin temperature of the user, and acquires biological information related to the user's forehead skin temperature every minute.

[0022] In addition, in the biological information acquisition unit 21, it is also possible to use, as biological information, the temperature such as the skin contact temperature or the body temperature at locations other than the forehead of the user, acquire various other information such as the pulse wave (heartbeat), brain wave, or blood flow of the user, or combine these. However, from the perspective of the high correlation with the risk of heat stroke, a configuration in which the body temperature of the user is acquired using a temperature sensor as biological information is preferable. Further, from the viewpoints of safety, which does not require the user to insert an instrument into the body, and ease of measurement, for an operator performing dangerous work, a configuration in which a skin surface temperature sensor is provided on a wearable device worn by the user to acquire the body temperature of the user is more preferable. In addition, from the perspective of measuring biological information at a location close to the brain, where the influence of heat stroke is greatest, a configuration in which a contact temperature sensor is provided at the forehead portion of the helmet 6 to measure the skin contact temperature is more preferable for the body temperature of the user. Further, the measurement function in the biological information acquisition unit 21 can also be configured to be used not only for measuring the heat stroke risk level of the operator but also for measuring the performance of athletes or for monitoring the physical condition of the elderly and infants in a hospital. The biological information acquisition unit 21 can also be configured using an infrared sensor or an ultrasonic sensor.

[0023] In the present embodiment, the environmental information acquisition unit 22 is housed inside the case C provided in the helmet 6, and acquires environmental information around the user at every predetermined measurement time. The environmental information acquisition unit 22 in the present embodiment is composed of a temperature sensor that acquires the outside air temperature every minute, a humidity sensor that acquires the outside humidity every minute, and the like.

[0024] The environmental information acquisition unit 22 calculates, every minute, an approximation of the WBGT index (wet-bulb globe temperature), which is known as the heat stress index, from the acquired outside air temperature and outside humidity (hereinafter simply referred to as "WBGT"). The WBGT index is an index that quantifies the magnitude of heat stress on the human body considering air temperature, humidity, wind speed, and radiant heat. When this value is large, it is desirable to suspend work or sports. In addition to the outside air temperature and outside humidity, the environmental information acquisition unit 22 can also acquire solar radiation intensity, weather, illuminance, etc., and various information such as time and position information, or use them in combination as environmental information. However, from the perspective of measurement simplicity, it is preferable to calculate the environmental information based on the air temperature and humidity around the user.

[0025] As shown in FIG. 2, the monitoring control unit 3 includes a user score calculation unit 31, a determination score calculation unit 32, and a determination unit 33, and each unit includes a storage unit (such as a memory) and an arithmetic unit (such as a CPU) not shown in the figure. Hereinafter, each unit will be specifically described.

[0026] The user score calculation unit 31 calculates the user score every measurement time (1 minute) based on the biological information of the user (the forehead skin temperature of the user in this embodiment) acquired by the biological information acquisition unit 21 and the environmental information (the WBGT around the user in this embodiment) acquired by the environmental information acquisition unit 22.

[0027] Specifically, in the storage unit of the user score calculation unit 31, scores (hereinafter referred to as "biological scores") preset corresponding to the biological information data (the forehead skin temperature of the user) acquired by the biological information acquisition unit 21 are stored. Also, in the storage unit of the user score calculation unit 31, scores (hereinafter referred to as "environmental scores") preset corresponding to the environmental information data (WBGT) acquired by the environmental information acquisition unit 22 are stored. Then, in the arithmetic unit of the user score calculation unit 31, the biological score corresponding to the received biological information data and the environmental score corresponding to the received environmental information data are added together to calculate the user score for each measurement time.

[0028] The determination score calculation unit 32 calculates the determination score for each measurement time by accumulating the values calculated from the user score calculated by the user score calculation unit 31 and the time coefficient set for each elapsed time retrogressing from the present to the past.

[0029] The determination unit 33 determines whether the determination score calculated by the determination score calculation unit 32 exceeds a preset threshold value. Specifically, if the determination score is less than the threshold value, it is determined as "safe", and if the determination score is equal to or greater than the threshold value, it is determined as "dangerous". When the determination unit 33 determines "dangerous", the detection unit 2 transmits abnormality occurrence information indicating that an abnormality has occurred to the user to the communication unit 4.

[0030] As shown in FIG. 1, the communication unit 4 in the monitoring unit U has a two-way communication function for exchanging data with the communication unit 4 in another monitoring unit U via the communication line 10. In the mutual monitoring system 1, one-to-many wide-area wireless communication is adopted for the communication between the communication units 4. Specifically, Bluetooth (registered trademark) is adopted as the communication method between the communication units 4. The communication method between the communication units 4 can also adopt Wi-Fi (registered trademark), wireless LAN, ZigBee (registered trademark), NFC, etc. From the viewpoint that the communication method between the communication units 4 can communicate within 400 m and can perform broadcast communication, Bluetooth is preferable.

[0031] In addition, the communication unit 4 has a transmission function for transmitting the abnormality occurrence information to the notification lamp 7 and the specific lamp 8. One-to-one short-range wireless communication is adopted for the communication between the communication unit 4 and the notification lamp 7 and the specific lamp 8. Specifically, Bluetooth is adopted as the communication method between the communication unit 4 and the notification lamp 7 and the specific lamp 8, the same as the communication between the communication units 4. The communication between the communication unit 4 and the notification lamp 7 and the specific lamp 8 can communicate within 30 m, and it is also possible to adopt ANT from the viewpoint of power saving in the range of several meters. In the present embodiment, by making the communication between the communication unit 4 and the notification lamp 7 and the specific lamp 8 wireless, it is possible to prevent the wiring from getting in the way when using the monitoring unit U.

[0032] The notification lamp 7, which is the first notification unit, and the specific lamp 8, which is the second notification unit, are light-emitting members using LEDs. As the first notification unit and the second notification unit, in addition to light-emitting members, sound-emitting members such as buzzers, oscillating members such as vibrators, heat-generating members, display members such as displays, odor-generating members, etc. can be adopted singly or in combination. Also, the notification methods of the first notification unit and the second notification unit may be different. In the present embodiment, as the first notification unit and the second notification unit, the notification lamp 7 and the specific lamp 8, which are light-emitting members that can be recognized even at a work site with a lot of noise and vibration, are adopted.

[0033] As shown in FIGS. 3 to 5, the notification lamp 7 is fixed at a position where the user wearing the helmet 6 can visually recognize it (in this embodiment, the lower surface portion of the visor of the helmet 6). Also, the specific lamp 8 is fixed at a position on the helmet 6 where other users can easily visually recognize it (in this embodiment, the rear portion of the helmet 6).

[0034] The notification lamp 7 can also be fixed to clothing other than the helmet 6 as long as it is a position where the user himself / herself can visually recognize it. Also, the specific lamp 8 can be fixed to clothing other than the helmet 6 as long as it is a position where other users can easily visually recognize it. The notification lamp 7 and the specific lamp 8 can also be fixed to clothing other than the helmet 6. The fixing means for the notification lamp 7 and the specific lamp 8 can be anything such as a clip, a screw, a hook-and-loop fastener, a magnet, double-sided tape, a snap pin, etc., but it is preferable to adopt a clip that is easy to attach and detach.

[0035] The sizes of the notification lamp 7 and the specific lamp 8 are preferably small (20 mm to 50 mm × 20 mm to 60 mm) because they are excellent in portability and wearability. Also, the shapes of the notification lamp 7 and the specific lamp 8 can be anything such as round or polygonal, and a round shape is particularly preferable for reasons such as light distribution, waterproofness, and minimization.

[0036] In this embodiment, when the determination unit 33 determines "safe", the determination unit 33 determines that no abnormality (increase in the risk of heat stroke) has occurred to the user and does not transmit abnormality occurrence information. In this case, in any of the monitoring units U1 to U4, the notification lamp 7 and the specific lamp 8 do not emit light.

[0037] On the other hand, when the determination unit 33 determines "dangerous", the determination unit 33 determines that an abnormality (increase in the risk of heat stroke) has occurred to the user and transmits the abnormality occurrence information to the communication unit 4. The communication unit 4 that has received the abnormality occurrence information from the detection unit 2 in the same monitoring unit U transmits the abnormality occurrence information to the notification lamp 7 and the specific lamp 8 in the monitoring unit U1 and the communication units 4 in the other monitoring units U2 to U4.

[0038] The notification lamp 7 and the specific lamp 8 that have received the abnormality occurrence information in the monitoring unit U1 emit light to notify that the risk of heat stroke of the user has increased. The user of the monitoring unit U1 visually recognizes that the notification lamp 7 and the specific lamp 8 of the monitoring unit U1 he / she is carrying are emitting light, and thus recognizes that his / her risk of heat stroke is high.

[0039] In the other monitoring units U2 to U4, the communication unit 4 that has received the abnormality occurrence information from the communication unit 4 in the monitoring unit U1 transmits the abnormality occurrence information to the notification lamp 7. That is, when the communication unit 4 receives the abnormality occurrence information from the communication unit 4 in the other monitoring unit U via the communication line 10, the communication unit 4 transmits the abnormality occurrence information only to the notification lamp 7. Then, the notification lamp 7 in the other monitoring units U2 to U4 emits light to notify that the risk of heat stroke of any user has increased.

[0040] The users of the monitoring units U2 to U4 recognize that the risk of heat stroke has increased in users other than themselves by visually confirming that their own notification lamp 7 is lit and that their own specific lamp 8 is not lit. Then, the users of the monitoring units U2 to U4 identify a person at high risk of heat stroke and recognize that the risk of heat stroke for that user has increased by visually confirming that the specific lamp 8 of the user of the monitoring unit U1 is lit.

[0041] As described above, according to the mutual monitoring system 1 according to the present embodiment, for the people around a person at risk of heat stroke (the user of the monitoring unit U1), the presence of the person at risk of heat stroke and the location where that person is located are notified. In other words, in the mutual monitoring system 1, abnormal occurrence information is transmitted to the communication units 4 of the other monitoring units U2 to U4 located at positions (near the person at risk of heat stroke) that can communicate with the communication unit 4 in the monitoring unit U1. This encourages rescue by the surrounding people and enables prompt and appropriate rescue activities to be carried out when the risk of heat stroke increases.

[0042] As described above, the helmet 6, which is an example of a wearable device used by a user by wearing it on the body in the mutual monitoring system 1, includes a biological information acquisition unit 21, which is a sensor for detecting the state of the user, and a covering material 11 that covers the detection unit of the biological information acquisition unit 21. The biological information acquisition unit 21 is provided on the covering material 11 and detects the state of the user through the covering material 11.

[0043] As shown in FIGS. 4 to 7, the covering material 11 is a substantially rectangular cloth-like member. As shown in FIG. 6, on one surface of the covering material 11 (the inner peripheral surface when the covering material 11 is wound around the headband 61), four hook-and-loop fasteners are provided as engaging members 12. Note that the engaging method by the engaging member 12 is not limited to the hook-and-loop fastener, and other engaging methods such as clips and buttons can also be adopted. Further, on one surface of the covering material 11, cylindrical storage portions 13·13 are assembled along the longitudinal direction at an intermediate portion in the short-side direction. As shown in FIGS. 5 and 6, the gap between the storage portions 13·13 is disposed at the central portion of the covering material 11.

[0044] In the helmet 6, the covering material 11 may be a material with high flexibility. For example, it is possible to adopt a conductive material such as a mesh fabric, Gore-Tex (registered trademark), foamed polyurethane, or silver fiber. When the helmet 6 is used in the mutual monitoring system 1 for measuring the risk of heat stroke as in the present embodiment, from the viewpoint of enhancing the cooling effect of the skin contact surface and improving the touch and softness, it is preferable to adopt a laminate of a breathable mesh fabric and foamed polyurethane as the covering material 11. Further, by adopting foamed polyurethane, the thickness of the detection portion and the wiring 21a can be relaxed, and it becomes possible to eliminate the discomfort felt when wearing the helmet 6.

[0045] In the present embodiment, the biological information acquisition unit 21 and the covering material 11 are detachably provided with respect to the helmet 6. Specifically, as shown in FIGS. 5 to 7, when attaching the covering material 11 to the helmet 6, the biological information acquisition unit 21 and the wiring 21a are inserted into one storage portion 13 (the right storage portion 13 in FIGS. 5 and 6), and the detection portion of the biological information acquisition unit 21 is exposed from the gap between the storage portions 13·13. Then, as shown in FIG. 7, the covering material 11 is wound around the front portion of the headband 61 of the helmet 6 such that the surface on which the biological information acquisition unit 21 is exposed faces inward, and the opposing engaging members 12·12 are engaged. Thereby, the covering material 11 is attached to the helmet 6 together with the biological information acquisition unit 21. Conversely, by releasing the engagement of the engaging members 12·12 in the covering material 11, the covering material 11 can be removed from the helmet 6 together with the biological information acquisition unit 21.

[0046] As described above, the helmet 6 enables the covering material 11 provided with the biological information acquisition unit 21 to be removed from the headband 61. Therefore, after using the helmet 6, the covering material 11 and the biological information acquisition unit 21 can be removed from the headband 61, and the headband 61 can be washed with water. That is, it is possible to suppress the odor and dirt of the headband 61, and prevent the detection accuracy of the biological information acquisition unit 21 from decreasing due to sweat.

[0047] Also, in this embodiment, since the covering material 11 is attached to the headband 61, it is possible to absorb sweat with the covering material 11 and make it less stuffy. Furthermore, by removing the case C from the helmet 6, the biological information acquisition unit 21 can be removed from the helmet 6. As a result, it is also possible to wash the entire helmet 6 with water. In addition, since the covering material 11 is inserted between the headband 61 and the forehead, it is possible to absorb sweat with the covering material 11 and make it less stuffy. Also, when the headband has a tightening mechanism, by strongly tightening the headband, the covering material 11 adheres more closely to the forehead, so the effect of the covering material 11 absorbing sweat is enhanced, and the detection accuracy in the detection unit is also improved.

[0048] Also, in the helmet 6, the detection unit in the biological information acquisition unit 21 is detachably attached to the surface on the side opposite to the surface exposed to the user in the covering material 11 (the outer peripheral surface when the covering material 11 is wound around the headband 61) (similarly, the inner peripheral surface). As a result, the covering material 11 is inserted between the detection unit and the forehead, and the covering material 11 can absorb sweat, so it is possible to further prevent the detection accuracy of the biological information acquisition unit 21 from decreasing due to sweat. Also, by removing the biological information acquisition unit 21 from the covering material 11, it is possible to replace the covering material 11 with a new one, or wash the dirty covering material 11 and reuse it.

[0049] In addition, in the helmet 6, storage portions 13·13 are provided on the inner peripheral surface when the covering material 11 is wound around the headband 61. And a configuration is adopted in which a wiring 21a, which is a part of the biological information acquisition unit 21, is accommodated in the storage portion 13. Thereby, since the biological information acquisition unit 21 can be provided on the covering material 11 simply by inserting it into the storage portion 13, it becomes possible to easily attach and detach the biological information acquisition unit 21 with respect to the covering material 11. Note that it is also possible to adopt a configuration in which the entire biological information acquisition unit 21 including the detection unit is stored in the storage portion 13.

[0050] In addition, in the present embodiment, in a state where the biological information acquisition unit 21 is provided on the covering material 11, a configuration is adopted in which the detection unit and the covering material 11 are in direct contact. That is, only the covering material 11 is arranged between the skin of the user and the detection unit, and since the distance between the skin and the detection unit does not increase, it is possible to prevent the detection accuracy by the biological information acquisition unit 21 from decreasing.

[0051] In addition, in the present embodiment, when exposing the detection unit of the biological information acquisition unit 21, the detection unit can be fixed to the covering material 11 by attaching a seal coated with an adhesive to one side or both sides of the detection unit. Thereby, it becomes possible to prevent the detection unit from being displaced. When fixing the detection unit with a seal coated with an adhesive on one side, the seal is attached to the covering material 11 in a state of covering all or a part of the detection unit. When fixing the detection unit with a seal coated with an adhesive on both sides, one adhesive surface of the seal is attached to the covering material 11, and the detection unit is attached and fixed to the other adhesive surface of the seal. Note that as long as the detection unit can be fixed, the size and shape of an arbitrary seal can be selected regardless of the size and shape of the detection unit.

[0052] The base material of the seal can adopt urethane non-woven fabric, vinyl chloride, stretchable cotton cloth, sponge sheet, urethane film, olefin film, etc. From the viewpoints of waterproofness, moisture permeability, air permeability, etc., it is preferable to adopt urethane non-woven fabric or urethane film as the base material of the seal. Also, for the purpose of ensuring air permeability, the seal can be used with mesh-shaped holes opened. As the adhesive, acrylic resin, natural rubber, synthetic rubber, silicone resin, etc. can be adopted and can be selected according to the purposes such as moisture permeability, cold resistance, heat resistance, chemical resistance, etc. The adhesive of the seal preferably has an adhesive strength that can be peeled off when the covering material 11 is replaced or washed.

[0053] Also, in this embodiment, the covering material 11 is formed of a breathable material. Thereby, the cooling effect of the skin contact surface is enhanced to improve the comfort of the user. Furthermore, it is preferable that the covering material 11 is formed of mesh fabric and the biological information acquisition unit 21 is configured to detect the body temperature of the user. Thereby, since the air permeability of the covering material 11 is improved and the temperature near the detection unit drops, it is possible to hardly cause an error during body temperature measurement.

Explanation of Reference Numerals

[0054] 1 Mutual Monitoring System 2 Detection Unit 3 Monitoring Control Unit 4 Communication Unit 6 Helmet (Wearable Device) 7 Notification Lamp 8 Specific Lamp 10 Communication Line 11 Covering Material 12 Engagement Member 13 Storage Unit 21 Biological Information Acquisition Unit 21a Wiring 22 Environmental Information Acquisition Unit 31 User Score Calculation Unit 32 Judgment Score Calculation Unit 33 Judgment Unit 61 Headband U Monitoring Unit

Claims

1. A helmet that a user wears on the head for use, comprising: a sensor for detecting the state of the user, a covering material covering the detection part of the sensor, and a headband for fixing the helmet to the user's head; the covering material is a cloth-like member detachably provided with respect to the front part of the headband, the sensor is provided on the covering material and detects the forehead skin temperature of the user through the covering material, the detection part of the sensor is detachably attached to the surface of the covering material on the side opposite to the surface exposed to the user side, the covering material is wound around the front part of the headband in a state where the surface provided with the detection part faces inward, and at least a part of the end of the covering material and the other part of the covering material are opposed to each other and engaged or disengaged from each other, whereby the helmet is detachably attached to the front part of the headband.

2. The helmet according to claim 1, wherein the headband has a tightening mechanism.

3. The helmet according to claim 1 or claim 2, wherein the covering material is a breathable material made of a mesh fabric, a foamed polyurethane, or a conductive material of silver fiber.

4. The helmet according to any one of claims 1 to 3, wherein the covering material is a mesh fabric and the sensor detects the body temperature of the user.

5. The helmet according to any one of claims 1 to 4, which determines the risk of heat stroke of the user from the detection result by the sensor.

6. The helmet according to any one of claims 1 to 5, wherein the sensor is detachably provided with respect to the covering material.

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