JP2005232931A - Key mislaying preventive system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a key mislaying preventive system without causing an erroneous report, when any person leaves a room when a plurality of persons stay in the room, and even when inviting a visitor when the visitor comes. <P>SOLUTION: This key mislaying preventive system has a door opening-closing detecting means 4 for detecting opening-closing of a door 3, a holder unit 6 for setting an effective transmission range L2 of a transmission radio wave W1 so as to become shorter than a distance L1 up to a wall Wa opposed to the door 3 and constituted so as to be capable of holding a key 5 of the door 3, an antenna 12 arranged in an area A outside of the effective transmission range L2 when its holder unit 6 is positioned in the vicinity UD of the door 3, a human body detecting sensor 7 for setting the substantial whole of the room R as a detecting range except for the vicinity UD of the door 3 inside of the room R, and a speaker 2 for notifying mislaying of the key 5; and issues a warning by the speaker 2 when the human body is not detected by the human body detecting sensor 7 by receiving the transmission radio wave W1 by the antenna 12 when detecting the opening-closing of the door 3 by the door opening-closing detecting means 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a key misplacement prevention system that prevents a user from being locked out of a room provided with an auto-locking door while the key is misplaced.

  In accommodation facilities such as hotels, an auto-locking door is often used in order to enhance the convenience of the user and the crime prevention effect. However, contrary to these effects, there are some users who leave without staying in the room where they are staying and are locked out of the room. In such a case, the user has to take the key to the front, and in high-rise hotels, it may take a considerable amount of time to go to the front and the locked-out room. For this reason, there have been many requests for a system that can effectively prevent the case where the key is left in the room while maintaining the advantageous aspects of auto-locking.

  As a conventional example of such a system, one disclosed in Japanese Patent Laid-Open No. 4-155080 (Patent Document 1) is known. This system includes at least a weak power transmitter that constantly transmits identification information, a detector that detects that the door has been opened and closed, and a receiver that has an antenna having directivity in the outdoor direction. When it is detected that the terminal is closed and the identification information cannot be received, an alarm is issued to warn of the misplacement of the key. That is, when the transmitter corresponding to the key is left behind in the room, the radio wave including the identification information does not reach the receiver, and this is used to prevent the key from being left behind.

  Japanese Patent Laying-Open No. 2003-132435 (Patent Document 2) discloses a hotel customer service system using a passive tag. One of the functions of this system includes a lock-out prevention function by auto-locking. When the door is closed, a transmission command is output from a tag reader installed in the room or the like, and a reply is received from the key built in the passive tag. In the case of an error, a message indicating that there is a misplacement is output. That is, when a key is left behind in a room, radio waves reach the tag reader from a passive tag built in the key, and this is used to prevent misplacement. As described above, there has been known a prior art that prevents the misplacement of a key with or without radio wave detection.

Japanese Patent Laid-Open No. 4-155080 JP 2003-132435 A

  However, in each of the above-mentioned systems, it is determined whether or not the key has been misplaced based on whether or not the radio wave is detected when the door is closed. When a person leaves the room or when a guest comes in, there is a problem that a false notification is given that the key has been forgotten. In other words, in these cases, since at least one of the persons will continue to be in the room, those who leave the room do not feel the need to leave the room while holding the key. Will be left behind. Nonetheless, each of the above systems only determines the presence or absence of radio wave detection when the door is closed, so that the key may be left in the room, but the key has been misplaced. There was a problem of misrecognition.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to have a plurality of people in a room, and when one of them leaves the room or a guest comes in It is intended to provide a key misplacement prevention system that does not cause false alarms even in the case of failure.

  In order to provide such a system, as means corresponding to claim 1, door opening / closing detection means for detecting that a door provided in a room is opened or closed, and a distance to a wall facing the door And a transmitter configured to be able to hold the door key and an antenna installed outside the effective transmission range when the transmitter is located near the door. The door is opened by the receiver, the human body detection means that covers almost the entire room except the vicinity of the door inside the room, the warning means for notifying that the key is left behind, and the door open / close detection means. Or a control means for instructing a warning means when the reception means can receive the transmission radio wave and the human body detection means has not detected the human body when it is detected that it has been closed. Door is preferable.

  Further, as means corresponding to claim 2, except for a door opening / closing detection means for detecting that a door provided in the room is opened or closed and the vicinity of the door inside the room, almost all of the room is detected. An antenna is installed at a position where the receiver does not receive transmission radio waves when the receiver is located near the door, while having a human body detection means and an effective transmission range shorter than the distance to the wall facing the door. A transmitter that detects whether the door has been opened or closed by the door opening / closing detection means, and transmits a radio wave from the antenna when the human body detection means has not detected a human body; A receiver configured to hold the door key and notifying that the key has been misplaced, and a control means for instructing the warning means when receiving a radio wave from the transmitter Preferably comprises a.

  Further, as means corresponding to claim 3, door opening / closing detection means for detecting that a door provided in the room is opened or closed, and a receiver comprising an antenna installed in the vicinity of the door; The transmitter is configured to receive the transmission radio wave when it is located near the door, and the transmitter is configured to be able to hold the key of the door, except for the vicinity of the door inside the room. When detecting that the door has been opened or closed by the human body detecting means for detecting almost all of the room, the warning means for notifying that the key is left behind, and the door opening / closing detecting means, It is preferable to include a control unit that issues a notification instruction to the warning unit when the transmission radio wave cannot be received and the human body detection unit does not detect the human body.

  Further, as means corresponding to claim 4, the control means of claim 1 or claim 3 is configured such that when the door opening / closing detection means detects that the door is opened or closed, the transmission means receives the transmission. When the radio wave can be received and the human body is not detected by the human body detection means, it is preferable not to automatically lock the door.

  Further, as means corresponding to claim 5, the control means of claim 1 or claim 3 or claim 4 notifies that the key has been misplaced when the remaining transmitter from the room is misplaced. It is also preferable to do so. Further, as means corresponding to claim 6, it is also preferable that a plurality of the warning means is provided for any of the means of claims 1 to 5.

  Thus, according to the means corresponding to claims 1 to 3, there is a case where there are a plurality of persons in the room and any one of them leaves the room or a guest comes in and invites them. However, there is an effect that no false alarm is caused. Further, according to the means corresponding to claim 4, there is an effect that when the key is left behind, it is not locked out of the room by the automatic lock.

  Further, according to the means corresponding to claim 5, a plurality of roommates leave a person having the last transmitter, and take out another transmitter without forgetting, and then a person having the last transmitter Since the warning is given only when the transmitter is forgotten, the warning will not cause a noise and it is possible to reliably prevent the key from being left behind. . Further, according to the means corresponding to the sixth aspect, since the key misplacement is repeatedly notified, it is possible to prevent the misplacement of the key more reliably. .

[First Embodiment]
Next, based on the above solution, a preferred embodiment for carrying out the present invention will be described. This embodiment is an embodiment corresponding to claim 1. First, the outline will be described as follows. As shown in FIG. 1, a radio wave W1 is transmitted from a holder unit 6 to which a key 5 is attached, and the radio wave W1 is received by an antenna 12 installed at a corner of a room R. At this time, the effective transmission range of the radio wave W1 transmitted from the holder unit 6 is set to L2 shorter than the distance L1 to the wall Wa facing the door 3, and the antenna 12 is positioned near the door 3 in the antenna 12. Installed in the area A outside the effective transmission range L2. Thus, when the user tries to leave the room while holding the holder unit 6, the radio wave W1 from the holder unit 6 cannot be received by the antenna 12, as shown in FIG. Therefore, using this, when the door opening / closing detection means 4 detects that the door 3 of the room R has been opened, if the radio wave W1 cannot be received, the key 5 is misplaced. In this case, notification is to be made by the speaker 2 serving as notification means.

  The basic idea so far is substantially the same as the prior art. Here, the present embodiment differs from the prior art in that it has a feature that a human body detection sensor 7 having a detection range in substantially all of the room R except for the door 3 vicinity UD (range L1-L2) inside the room R. As shown in FIG. 2, when it is detected that the door 3 is opened (step S1), the antenna 12 can receive the radio wave W1 of the holder unit 6 (step S2). ) And when no one is present in the room R (step S3), the speaker 2 is notified that the key has been left behind (step S4). In this way, even when the radio wave W1 can be received, if a human body is detected, a notification of forgetting the key placement is not made, so there are a plurality of people in the room, and any one of them is Even when the user leaves the room or invites a guest to come in, false information can be prevented. Although it has been described that it is detected that the door 3 is opened, it is needless to say that the door 3 may be detected to be closed.

  Next, a specific configuration for achieving the above operation will be described in detail with reference to FIGS. FIG. 3 is a block diagram showing the configuration of each part of this embodiment. First, the key misplacement prevention system according to the present embodiment includes an indoor unit 1 for determining whether a key is misplaced, a speaker 2 serving as notification means for notifying key misplacement, and a door open / close detection means 4 for detecting opening / closing of the door 3. The room 5 is attached to the room R except for the holder unit 6 held by the user of the room R and the door 3 near the UD in the room R when the key 5 is used. And a human body detection sensor 7 for detecting a person who is present. Here, when the room R is small, the indoor unit 1 and the speaker 2 may be configured integrally.

  The indoor unit 1 receives power supplied from a commercial power source, and supplies a power circuit 11 that supplies DC power to each part in the unit, and a radio wave W1 (transmitted radio wave) transmitted from the holder unit 6 via an antenna 12. A receiving circuit 13 for receiving, and a function as a receiver. The indoor unit 1 also receives the predetermined signal described above from the signal included in the radio wave W1 from the receiving circuit 13, the opening / closing signal of the door 3 detected by the door opening / closing detection means 4, and the detection signal from the human body detection sensor 7. When the condition is met, the control circuit 14 for notifying the speaker 2 that the key has been left behind is provided, and also has a function as a control means. Here, the power supply circuit 11 is an AC-DC converter that converts AC100V, which is a commercial power supply, into an operating voltage of each circuit.

  The antenna 12 is not particularly limited as long as the antenna 12 is attached to the ceiling or wall surface of the room R or the back side thereof, and can receive the radio wave W1 of the holder unit 6, but is preferably a room. A directional antenna having the entire R as a detection range, for example, a small patch antenna that does not impair aesthetics is used. The antenna 12 is installed in the area A outside the effective transmission range L2 when the holder unit 6 is located in the vicinity of the door 3, and is not only separated from the indoor unit 1 but also integrally formed. It is good. Next, the receiving circuit 13 is a receiving circuit suitable for specific low power radio or weak radio, and amplifies and filters the radio wave W1 received by the antenna 12, and then performs demodulation and transmits from the holder unit 6 It has a function of acquiring the output signal and outputting it to the control circuit 14.

  Here, when the specific low-power wireless standard is adopted, the effective transmission range L2 of the radio wave W1 reaches several tens of meters. Therefore, the gain of the antenna 12 is designed to be small, or the antenna 12 and the receiving circuit 13 By inserting an attenuator (attenuator) between them, or by preventing the receiving circuit 13 from receiving unless the signal strength is a certain value or more, the distance L2 is smaller than the position L1 farthest from the door 3. Adjusted to That is, adjustment is made so that the radio wave W <b> 1 is not received by the antenna 12 when the holder unit 6 is positioned near the door 3. The control circuit 14 is a so-called microcomputer that receives and processes each part in the indoor unit 1, an output to the speaker 2, an opening / closing signal from the door opening / closing detection means 4, and a detection signal from the human body detection sensor 7. In the memory, the individual identification code of the corresponding holder unit 6 is registered in advance.

  Continuing the explanation of each other part, the speaker 2 emits an alarm sound to call attention in accordance with the notification command from the control circuit 14 described above, and “I forgot the key!” By voice synthesis as necessary. For example, it is provided at the center of the ceiling of the room R. The door 3 is a so-called general door, and includes at least a door portion 31. In the case of the present embodiment, a frame portion 32 that surrounds the entire periphery of the door portion 31 is provided. Here, a magnet 41 is provided at the free end of the door portion 31, and the door open / close detection means 4 is configured by a reed switch 42 provided at a corresponding position of the frame portion 32. When the door portion 31 is closed, the magnet 41 comes close to the reed switch 42 and the switch is turned on or off, so that the control circuit 14 can detect the opening / closing of the door 3. Yes. Although the magnet 41 has been described as being provided on the door 31, the magnet 41 may naturally be provided on the frame 32 and the reed switch 42 may be provided on the door 31.

  Next, the holder unit 6 is a so-called key holder configured to be able to hold the key 5, and includes a transmission circuit 62 for outputting the radio wave W <b> 1 via the antenna 61 and the transmission circuit 62. And a control circuit 63 that outputs a transmission signal to the antenna 12 of the indoor unit 1 at predetermined intervals (for example, every several seconds), and a battery 64 that supplies power to the respective units. It has the function as. Here, the antenna 61 is not particularly limited as long as it can transmit the radio wave W1, but since it is unknown in which direction the holder unit 6 is placed, the antenna 61 is directed to the antenna 12 in any direction. It is preferable to employ an omnidirectional antenna so that the radio wave W1 can be transmitted. For example, a monopole antenna or the like is used.

  The transmission circuit 62 is a transmission circuit suitable for a specific low power radio or weak radio corresponding to the reception circuit 13 of the indoor unit 1, and modulates a signal transmitted from the control circuit 63 with a carrier wave and transmits After the power is amplified, the antenna 61 has a function of transmitting the radio wave W1. The control circuit 63 creates a signal including an individual identification code stored in its own memory as a transmission signal to the transmission circuit 63 described above in accordance with a format described later as an example. The battery 64 is not particularly limited as long as it supplies power to each part, but is preferably a rechargeable battery, for example, a nickel metal hydride battery. The battery 64 is installed at a front desk when it is adopted at an accommodation facility such as a hotel, and when it is employed at a working facility such as an office (not shown) Without charge).

  The human body detection sensor 7 is not particularly limited as long as it can detect almost all of the room R except for the door 3 vicinity UD (range L1-L2) in the room R and detect the human body within the detection range. For example, a passive infrared sensor such as a pyroelectric sensor, an active infrared sensor, an ultrasonic sensor, or image processing may be used. For example, a multi-lens or a Fresnel lens is used for setting the detection range when a passive infrared sensor is used. In the room R, as shown in FIG. 1, a plurality of human body detection sensors 7 may be provided. Further, FIG. 1 illustrates a guest room of a hotel or the like that has a bed B, a bathroom, and a wash basin W as a room R and is in contact with the corridor C through the door 3, but a room that employs an auto-locking door. There is no particular limitation as long as it is.

  Therefore, for example, it may be a confidential management facility, such as a working facility such as the office described above. Although only one door 3 is illustrated in the figure, there may be a plurality of doors. In this case, the antenna 12 is installed at an equal distance from each door. The communication format between the indoor unit 1 and the holder unit 6 is not particularly limited as long as communication is possible. For example, as shown in FIG. 4, 1 and 0 are alternately arranged. A device including a preamble P, a synchronization word SW composed of a fixed bit string, and a unique individual identification code IN that differs for each holder unit 6 is used.

  Next, based on the above-described configuration and the like, the operation of the key misplacement prevention system according to the present embodiment will be described in detail with reference to FIGS. First, the control circuit 63 of the holder unit 6 refers to its own memory, stores the individual identification code IN in the communication format, adds the preamble P and the synchronization word SW, and sends a transmission signal at every predetermined time. The radio wave W1 is generated and transmitted to the indoor unit 1 via the transmission circuit 62 and the antenna 61. When the control circuit 14 of the indoor unit 1 detects that the door 31 has been opened or closed by the reed switch 42 (step S1), it determines whether the radio wave W1 can be detected by the receiving circuit 13 (step S2). .

  Here, even if the antenna 12 of the indoor unit 1 does not exist in the effective transmission range L2 of the radio wave W1 of the holder unit 6 or exists in the effective transmission range L2, the holder not registered in the indoor unit 1 If it is the unit 6, it is treated as a wireless reception impossible (N in step S2). That is, in the former case, the radio wave W1 does not reach the antenna 12 of the indoor unit 1 and is physically impossible. In the latter case, the control circuit 14 of the indoor unit 1 is stored in its own memory. This is because the registered individual identification code is checked to recognize that it is not stored in the memory, and the holder unit 6 is determined to be incompatible with the room R. The reason for responding only to the registered holder unit 6 is to prevent interference with the holder unit 6 in the adjacent room.

  On the other hand, when the holder unit 6 registered in the indoor unit 1 is within the effective transmission range L2 of the radio wave W1 of the holder unit 6 (Y in step S2), the control circuit 14 Except for the interior door 3 vicinity UD, it is determined whether or not the human body detection sensor 7 having a detection range of substantially all of the room R detects a human body (step S3). At this time, if a human body is detected, it is determined that there are multiple people in the room and one of them has left the room, or a guest has arrived and invited. Is not notified (Y in step S3). However, if the human body detection sensor 7 cannot detect the human body, it does not correspond to the case where a guest is invited, and it is determined that the key is left behind (N in Step S3), and the speaker 2 To notify that the key has been misplaced (step S4).

[Second Embodiment]
Next, a mode corresponding to claim 4 will be described. In the above embodiment, the inventors of the present application could provide a key misplacement prevention system that does not cause false alarms even when a guest comes and invites. However, in the above-described embodiment, since interlocking with the door auto-lock is not taken into consideration, even if the misplacement or the misplacement of the key 5 is informed, if the door is closed, the door is automatically locked and eventually locked out. There was a problem that. Therefore, as shown in FIG. 6, the inventors of the present application invalidate the auto-lock when the key is misplaced in conjunction with the auto-lock mechanism (step S41), while the key is misplaced. If not, came up with a system to enable auto-lock. By doing in this way, it can prevent being locked out when the key is misplaced.

  A more specific configuration will be described as shown in FIG. That is, as shown in the figure, to the configuration of the first embodiment, the intention to open the door portion 31 is transmitted to the indoor unit 1, and the door portion 31 is opened indoors to open the door portion 31 by a human hand. An indoor door knob 33 installed and a key insertion part 34 as a key detection means installed on the outside in the same manner are provided in the door part 31, and an electric lock 8 as a lock mechanism of the door 3, and its electric An electric lock control device 9 for controlling opening and closing of the lock 8 is newly provided. An outdoor door knob (not shown) is provided on the outdoor side in the same manner as in the prior art. Then, when a person in the room R tries to leave the room, when the indoor door knob 33 is rotated, the information is transmitted to the control circuit 14, and the control circuit 14 unlocks the electric lock control device 9. The command is transmitted, and the electric lock 8 is unlocked. Next, when the reed switch 42 detects that the door 31 has been opened and closed, the control circuit 14 transmits a lock command to the electric lock control device 9 and the electric lock 8 is locked.

  On the other hand, when the key is opened from the outside, the key 5 held by the holder unit 6 is inserted into the key insertion unit 34 so that the key insertion unit 34 can be used only when the key is suitable. Is transmitted to the effect that it is a valid key. The control circuit 14 that has received the message transmits an unlocking command to the electric lock control device 9, detects that the electric lock 8 is unlocked, and then the door 31 is opened and closed by the reed switch 42. Then, a lock command is transmitted to the electric lock control device 9, and the electric lock 8 is locked. The auto lock function is reproduced as described above. Thus, the overall operation of this embodiment will be described with reference to FIG. 6 in addition to FIG. First, when it is detected that the door portion 31 is opened or closed (step S1), it is determined whether the antenna 12 can detect the radio wave W1 from the holder unit 6 (step S2). This operation is substantially the same as the operation of the first embodiment.

  Here, the present embodiment is different from the above-described embodiment in that the radio wave W1 can be received (Y in step S2), and the human body detection sensor 7 did not detect the human body. In such a case (N in step S3), the control circuit 14 of the indoor unit 1 notifies the electric lock control device 9 even if it detects that the key 2 has been left behind from the speaker 2 and detects that the door 31 has been opened or closed. It is characterized in that the lock command is not transmitted and auto-lock is disabled (step S41). On the other hand, if reception of the radio wave W1 is impossible, it is determined that the key 5 has been taken out (N in step S2), or if the human body detection sensor 7 detects a human body, a guest or the like is invited. (Y in step S3) and detecting that the door 31 has been opened and closed, the control circuit 14 issues a lock command to the electric lock control device 9 assuming that the key 5 has not been left behind. Send and enable auto lock. Since other configurations and operations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

[Third Embodiment]
Next, a different form from the first embodiment (a form corresponding to claim 2) will be described. In the first embodiment, as shown in FIG. 1, the radio wave W1 transmitted from the holder unit 6 is received by the antenna 12 of the indoor unit 1, but in this embodiment, as shown in FIG. Contrary to the first embodiment, whether the radio wave W2 transmitted from the antenna 12 can be received by the holder unit 6, that is, whether the holder unit 6 exists in the effective transmission range L2 ′ of the radio wave W2, the key is determined. It is intended to detect misplaced items. Here, the effective transmission range L2 ′ is set to be L2 shorter than the distance L1 to the wall Wa facing the door 3, and when the holder unit 6 is positioned in the vicinity of the door 3, the radio wave from the antenna 12 is set. W2 is not received.

  The specific configuration will be described as shown in FIG. That is, as shown in the figure, compared to the configuration of the first embodiment, the holder unit 6 includes a receiving circuit 65 instead of the transmitting circuit 64, and further includes a speaker 2, which serves as a receiver. It has a function. The indoor unit 1 includes a transmission circuit 15 instead of the reception circuit 13 and has a function as a transmitter. The indoor unit 1 is different in that the speaker unit 2 is not provided in itself because the holder unit 6 includes the speaker 2.

  More specifically describing each configuration, the transmission circuit 15 newly provided in the indoor unit 1 is a transmission circuit suitable for a specific low power radio or weak radio, and a signal transmitted from the control circuit 14 is transmitted on a carrier wave. After modulating and amplifying the transmission power, the antenna 12 has a function of transmitting the radio wave W2. Here, the control circuit 14 according to the present embodiment creates a signal including an individual identification code stored in its own memory as a transmission signal to the transmission circuit 15 according to the format described above. On the other hand, the receiving circuit 65 of the holder unit 6 is a receiving circuit that is also suitable for specific low-power radio etc., and amplifies and filters the radio wave W2 received by the antenna 61, and then demodulates the indoor unit. 1 has a function of acquiring the signal transmitted from 1 and outputting it to the control circuit 63.

  Next, based on the above-described configuration and the like, the operation of the present embodiment will be described with reference to FIGS. 4 and 7 to 9. First, when the control circuit 14 of the indoor unit 1 detects that the door portion 31 is opened or closed by the reed switch 42 (step S1), the room R except for the vicinity UD of the door 3 in the room R. If the human body detection sensor 7 having substantially all of the detection range detects that a human body is not detected (step S11), a transmission signal including an individual identification code is created with reference to its own memory. Then, the radio wave W2 is transmitted to the holder unit 6 via the transmission circuit 15 and the antenna 12 (step S21). Here, when the indoor unit 1 registered in the holder unit 6 exists within the reception range L2 ′ of the holder unit 6, the radio wave W2 transmitted from the indoor unit 1 can be received (step S22). In this case, it does not correspond to the case where a guest is invited or the like, and it is determined that the key is misplaced, and the speaker 2 informs that the key is misplaced (step) S4).

  As described above, when the door portion 31 is opened or closed, the human body is not detected by the human body detection sensor that detects almost the entire room R except the door 3 vicinity UD in the room R. In this case, when the radio wave W2 is transmitted from the antenna 12 installed in the corner of the room R and the radio wave W2 is received by the holder unit 6, a notification that the key is left behind is notified. On the other hand, when the human body is detected when the door portion 31 is opened or closed, the radio wave W2 is not transmitted from the antenna 12, so the holder unit 6 is installed in the room R other than the door 3 vicinity UD. Even if it is placed, it will not be notified that the key has been left behind. Therefore, even in the configuration of the present embodiment, even if there are a plurality of people in the room and one of them leaves the room or a guest comes in and invites, false alarms can be prevented. it can. Since other configurations and operations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

[Fourth Embodiment]
Next, another form (form corresponding to claim 3) different from the first embodiment will be described in detail based on FIG. 10 and FIG. In the first embodiment described above, as shown in FIG. 1, the antenna 12 of the indoor unit 1 is installed at the position L1 farthest from the door 3, and the effective transmission range L2 of the radio wave W1 transmitted from the holder unit 6 is reached. Was adjusted to be smaller than the distance L1. On the other hand, in the present embodiment, the antenna 12 is installed in the vicinity UD of the door 3 and the effective transmission range L3 of the radio wave W1 is adjusted so that the radio wave W1 is received only in the vicinity UD. When the antenna 12 cannot receive the radio wave W1 transmitted from (step S24), it is intended to notify that the key has been left behind.

  The operation will be described as shown in FIG. As shown in the figure, when it is detected that the door 31 is opened or closed (step S1), it is determined whether or not the radio wave W1 can be detected by the receiving circuit 13 (step S2). Here, since the radio wave W1 can be received when the antenna 12 of the indoor unit 1 exists within the effective transmission range L3 of the radio wave W1 of the holder unit 6, it is assumed that the key 5 has not been left behind in the room R1. Is not issued (N in step S24). On the other hand, when the antenna 12 does not exist within the effective transmission range L3 of the radio wave W1 of the holder unit 6 (Y in step S24), substantially all of the room R except for the door 3 vicinity UD inside the room R. It is determined whether the human body detection sensor 7 having a detection range detects a human body (step S3).

  At this time, if a human body is detected, it is determined that the customer has come and invited, and the misplacement of the key is not notified (Y in step S3), but the human body detection sensor 7 detects the human body. If it is not detected, it does not correspond to a case where a guest is invited or the like, and it is determined that the key is misplaced (N in Step S3). Notification is made (step S4). Since other configurations and operations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted. Further, when the key is left behind, the auto-lock may be invalidated as in the second embodiment.

[Fifth Embodiment]
Next, an application mode of the first embodiment (a mode corresponding to claim 5) will be described with reference to FIGS. This embodiment is different from the first embodiment in that it has a feature in that different individual identification codes are stored in advance and the radio wave W1 is transmitted at predetermined intervals in a random cycle so that the transmission timings do not overlap each other. When there are a plurality of holder units 6 and the remaining one of the holder units 6 from the room R is misplaced (step S23), the key misplacement is notified. The operation will be described in detail. First, as shown in the figure, when it is detected that the door portion 31 is opened or closed (step S1), the control circuit 14 of the indoor unit 1 receives the receiving circuit 13. Thus, it is determined whether the radio wave W1 can be detected (step S2).

  At this time, if there are replies from a plurality of holder units 6, it is determined that there are a plurality of holder units 6 in the room R and they are not locked out of the room R, and a key misplacement notification is made. Is not performed (N in step S23). On the other hand, if there is only one holder unit 6 registered in the indoor unit 1 (Y in step S23), the control circuit 14 determines that there is a risk of being locked out of the room R, Except for the door 3 vicinity UD in the room R, it is determined whether or not the human body detection sensor 7 that detects almost the entire room R detects the human body (step S3). If a human body is detected, it is determined that the guest has come and invited, and the misplacement of the key is not notified (Y in step S3), but the human body detection sensor 7 detects the human body. If the key cannot be detected, it is determined that the key has been misplaced (N in Step S3), and the speaker 2 is notified that the key has been misplaced (Step S4).

  In this way, since only the holder unit 6 corresponding to the last key 5 is warned, a plurality of roommates leave the person having the last holder unit 6 and take out the other holder units 6 without forgetting them. After that, only when the person having the last holder unit 6 forgets the holder unit 6, the warning about the misplacement of the key is issued. It becomes possible to prevent. Since other configurations and operations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted. In addition to the first embodiment, the present invention can be applied to the second and fourth embodiments in the same manner.

[Sixth Embodiment]
Next, another application mode of the first embodiment (a mode corresponding to claim 6) will be described with reference to FIGS. This embodiment is different from the first embodiment in that it has a feature in that a plurality of notification means are provided. That is, a notification unit is provided outside the room R, and for example, an additional speaker 2 ′ is provided in the hallway C, and the additional speaker 2 ′ is connected to the control circuit 14. If necessary, the control circuits 14 of the indoor units 1 are connected to each other, and as shown in FIG. 13, an additional speaker 2 ′ common to the indoor units 1 installed in each of the plurality of rooms R1 and R2 is connected. You may make it provide. Further, for example, as shown in the figure, when there is an elevator EV or the like in the shared corridor C outside the rooms R1 and R2, the additional speaker 2 ′ may be provided in the vicinity of the elevator EV. Is.

  Thus, when a key is left in any room R1 or R2, the speaker 2 in the corresponding room R1 or R2 emits a warning sound and also the additional speaker 2 'emits a warning sound. At this time, from the additional speaker 2 ′, voice such as “the key has been left in room XX!” By voice synthesis so that it is clear in which room R1, R2 the key has been left behind. May be configured to emit. In this way, even if a warning is missed when leaving the room, for example, in front of an elevator EV, a warning is given even outside the room, so that the misplacement of the key is doublely notified. Can be left behind. Since other configurations and operations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted. In addition to the first embodiment, the present invention can be similarly applied to the second to fifth embodiments.

It is the schematic of the key misplacement prevention system which concerns on 1st Embodiment. It is a flowchart which shows operation | movement of the key misplacement prevention system which concerns on 1st Embodiment. It is a block diagram which shows the structure of the key misplacement prevention system which concerns on 1st Embodiment. It is an example of the communication format used with the key misplacement prevention system which concerns on 1st Embodiment. It is a block diagram which shows the structure of the key misplacement prevention system which concerns on 2nd Embodiment. It is a flowchart which shows operation | movement of the key misplacement prevention system which concerns on 2nd Embodiment. It is a block diagram which shows the structure of the key misplacement prevention system which concerns on 3rd Embodiment. It is the schematic of the key misplacement prevention system which concerns on 3rd Embodiment. It is a flowchart which shows operation | movement of the key misplacement prevention system which concerns on 3rd Embodiment. It is the schematic of the key misplacement prevention system which concerns on 4th Embodiment. It is a flowchart which shows operation | movement of the key misplacement prevention system which concerns on 4th Embodiment. It is a flowchart which shows operation | movement of the key misplacement prevention system which concerns on 5th Embodiment. It is the schematic of the key misplacement prevention system which concerns on 6th Embodiment. It is a block diagram which shows the structure of the key misplacement prevention system which concerns on 6th Embodiment.

Explanation of symbols

1 Indoor unit (receiver, transmitter)
12 Antenna 2 Speaker (Warning means)
2 'Additional speaker (Warning means)
3 Door 4 Door open / close detection means 5 Key 6 Holder unit (transmitter, receiver)
7 Human body detection sensor (human body detection means)
8 Electric lock 9 Electric lock control device L1 Distance to the wall Wa facing the door 3 L2 Effective transmission range

Claims (6)

  The door opening / closing detection means for detecting whether the door provided in the room is opened or closed, and the effective transmission range of the transmission radio wave is set to be shorter than the distance to the wall facing the door, the door Except for the transmitter configured to hold the key of the receiver, the receiver including the antenna installed outside the effective transmission range when the transmitter is located near the door, and the vicinity of the door inside the room, When the detection means detects that the door has been opened or closed by the human body detection means that detects almost the entire room, the warning means for notifying that the key is left behind, and the door opening / closing detection means, A key misplacement prevention system, comprising: a control unit that issues a notification command to a warning unit when the transmitted radio wave can be received and a human body is not detected by the human body detection unit.   Opposite to the door, a door opening / closing detection means for detecting that a door provided in the room is opened or closed, a human body detection means for detecting almost the entire room except the vicinity of the door inside the room, and the door An antenna is installed at a position where the receiver does not receive a transmission radio wave when the receiver is positioned near the door while the effective transmission range is shorter than the distance to the wall, and the door opening / closing detection means Detecting that the door has been opened or closed, and configured to be able to hold a transmitter that transmits radio waves from the antenna and the door key when the human body detection means does not detect the human body A warning means for notifying misplacement of the key, and a receiver including a control means for informing the warning means when the radio wave from the transmitter is received. Place Prevention system forget.   A door opening / closing detection means for detecting that a door provided in the room is opened or closed, a receiver including an antenna installed in the vicinity of the door, and a transmission when located near the door It is set so that radio waves are received by the receiver, and almost all of the room is set as a detection range except for a transmitter configured to hold the door key and the vicinity of the door inside the room. When the human body detecting means, the warning means notifying that the key is left behind, and the door opening / closing detecting means detecting that the door is opened or closed, the receiving means cannot receive the transmission radio wave, and the human body A key misplacement prevention system comprising: a control unit that issues a notification command to a warning unit when a human body is not detected by the detection unit.   When the door opening / closing detection means detects that the door is opened or closed, the control means can receive the transmission radio wave by the reception means, and the human body detection means has not detected the human body. 4. The key misplacement prevention system according to claim 1 or 3, wherein the door is not automatically locked.   The key according to claim 1, 3 or 4, wherein the control means notifies that the key has been misplaced when the remaining transmitter from the room is misplaced. Misplaced prevention system.   6. The key misplacement prevention system according to claim 1, wherein a plurality of warning means are provided.

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