JP2009169526A - Alarm - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an alarm having a structure capable of easily switching directivity of an antenna after installation. <P>SOLUTION: The antenna 7 with an external lead out part led out to the outside of a case 6 is fitted to an opening 64 arranged in the case 6, so that the antenna is held by the case 6 and introduced into the interior of the case 6. In the interior of the case 6, the antenna 7 is connected with a circuit board 2 built in the case 6 to constitute a wireless communication circuit. Then, the antenna 7 is configured to be turnable at the exterior of the case 6, thereby determining the directivity of the antenna 7 in the direction where the sensitivity is improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an alarm device that issues an alarm when an environmental value representing a change in environment exceeds an allowable range, and more particularly to an alarm device that has a built-in wireless circuit and can communicate with an external wireless communication device. Is.

  2. Description of the Related Art Conventionally, an alarm device that issues an alarm when an abnormality in an indoor environment is detected has been widely used in buildings, underground malls, ordinary houses, and the like. As such an alarm device, not only performs a notification operation on its own device, but also transmits a signal for notifying a detected abnormality to a management device or other alarm device connected to the own device. There is. Further, like the wireless smoke detector of Patent Document 1 provided by the present applicant, an alarm device that transmits a signal for notifying an abnormality to the outside has a built-in wireless line and wireless communication with the outside. There is something to do.

  A configuration of a smoke detection alarm device including a photoelectric smoke detector, which is one of these alarm devices, will be briefly described with reference to an exploded perspective view of FIG. The smoke detection alarm device shown in FIG. 19 is mounted with an optical base 1 including optical components such as a light emitting unit and a light receiving unit, optical elements such as a light emitting diode L and a photodiode PD, and various circuit components. A circuit board 2, an insect cover 3 for preventing insects and the like from entering the inside of the smoke sensing chamber into which the light emitting unit and the light receiving unit are inserted, a plate speaker 4 for sounding an alarm sound when a fire is detected, and a board A protective cover 5 enclosing the speaker 4 and the insect-proof cover 3, and a housing 6 containing the circuit board 2. In the exploded perspective view of FIG. 19, the top and bottom are reversed, and the lower side of the drawing is the installation surface side such as the ceiling surface.

  When the alarm device shown in FIG. 19 is configured to perform wireless communication, circuit components constituting a communication circuit for performing wireless communication are mounted on the circuit board 2 and the communication circuit and the electric circuit are electrically connected. The antenna to be connected to the circuit board 2 is soldered. Thus, by connecting the antenna to the circuit board 2 on which the communication circuit is mounted, the alarm device can perform wireless communication with the outside. However, in order to stably perform communication with the outside, the antenna Need to be long enough. For this reason, in Patent Document 2, for a small alarm device having a wireless communication function, an antenna incorporated in the alarm device is suspended from, for example, the inner peripheral surface of the side wall 61 of the housing 6 in the alarm device shown in FIG. I'm turning.

However, in the structure in Patent Document 2, the directivity of the antenna is fixed, so that the reception sensitivity may deteriorate depending on the installation position of the alarm device. On the other hand, as in Patent Document 3, when installing the alarm device, first, a fixed part fixed to the installation surface and a mounting part that is detachable from the fixed part are divided, There has been proposed an apparatus in which a mounting part is attached to a fixed part after changing the directivity of an antenna built in the apparatus.
JP-A-8-124059 JP 2002-216261 A JP-A-6-096373

  As described above, an alarm device having a wireless communication function, like the wireless transmitters in Patent Documents 1 to 3, depends on the wavelength of a signal for performing wireless communication in order to perform stable communication. An antenna with a long antenna length is required. Therefore, when the antenna is led out to the outside, the antenna has a structure that protrudes greatly, which not only looks bad, but also limits the installation location. Therefore, some of the antennas have a built-in antenna as in Patent Document 2 and Patent Document 3, but in the case where the antenna is fixedly installed as in Patent Document 2, the directivity of the antenna is low. It will be fixed.

  On the other hand, in the configuration of Patent Document 3, the directivity of the antenna mounted on the detachable mounting portion can be changed. However, in this configuration, each time the installation location of the alarm device is changed, the fixed portion and Disassembly from the mounting part is required. In addition, after the mounting portion is mounted on the fixed portion, the antenna directivity cannot be changed. Therefore, it is necessary to remove the mounting portion even when the reception sensitivity deteriorates.

  From these things, in the case of the structure of patent document 3, operation for changing the directivity of an antenna will become complicated for an operator. Furthermore, in the configuration of Patent Document 3, when the attachment portion is easily attached and detached, the attachment portion can be easily removed. Therefore, although low-power wireless communication is used for an alarm device, there is a risk that a malicious person can easily modify a radio circuit and an antenna for low-power wireless communication.

  In view of such a problem, an object of the present invention is to propose an alarm device having a structure capable of easily switching the directivity of an antenna after installation.

  In order to achieve the above object, an alarm device of the present invention includes a circuit board on which a wireless communication circuit that communicates with an external communication device is mounted, a housing that contains the circuit board, and the wireless circuit on the circuit board. An alarm device comprising: an antenna electrically connected to a communication circuit and led out of the housing; wherein the antenna has a movable external lead-out portion led out of the housing; The antenna directivity can be switched by changing the direction of the derivation unit.

  In such an alarm device, the connection portion between the antenna and the circuit board is configured by a flexible wire, so that the connection between the antenna and the circuit board can be changed with respect to switching the directivity of the antenna. Can be held. In addition, by providing a redundant portion for relaxing torsional stress on the connection portion side of the antenna with the circuit board, the connection between the antenna and the circuit board can be changed with respect to switching the directivity of the antenna. Can be held.

  In these alarm devices, the antenna may be fastened together with at least one of the circuit board and the housing with a single screw so that the antenna can be fixed easily. With such a configuration, it is possible to make it difficult to remove only the antenna, and it is difficult to modify the antenna for wireless communication. At this time, a solder layer sandwiched between a portion of the antenna on which the tightening force by the screw is applied and the circuit board may be provided, and the electrical connection may be made more reliable.

  In addition, a terminal that is electrically connected to the antenna while sandwiching the antenna is provided on the circuit board, and a connection portion of the antenna can be rotated with respect to the terminal, thereby enabling directivity of the antenna. For the switching, the connection between the antenna and the circuit board can be maintained.

  In each of the alarm devices described above, the antenna may be configured by a single metal wire having a spring property, and the antenna is configured by a flexible wire, and the external lead-out portion of the antenna is wound and held. A bobbin may be provided. By comprising in this way, an external derivation | leading-out part can be made into the helical antenna which becomes a spring shape, and the length of an external derivation | leading-out part can be shortened.

  Further, an antenna housing that covers the external lead-out portion of the antenna may be provided, and the antenna housing and the external lead-out portion may be configured by simultaneous molding. Thereby, it is possible to make it difficult to remove only the antenna, and it is difficult to modify the antenna for wireless communication. The antenna housing may be formed of a hot melt material.

  Moreover, it is good also as providing the antenna housing comprised with the some member while covering the said external derivation | leading-out part of the said antenna.

  At this time, an insertion hole is provided in one of the members to be connected to the connection portion of each member constituting the antenna housing, and after being inserted into the insertion hole in the other of the members to be connected, The antenna housing may be assembled by providing a claw that cannot be pulled out and connecting each of the members by a fitting structure in which the claw of the member is inserted into the insertion hole. The antenna housing may be assembled by connecting the connecting portions of the members constituting the antenna housing by ultrasonic welding. With these configurations, it is possible to make it difficult to remove only the antenna, and it is difficult to modify the antenna for wireless communication.

  Also, a weight for rotating the antenna housing by its gravity may be provided at the tip of the antenna housing, and the antenna directivity direction may be automatically set with respect to the installation position of the alarm device. .

  In the above-described alarm device, the housing has a holding hole for holding the antenna housing, and the antenna housing has a fitting portion that fits into the holding hole and is connected to the housing, and holds the holding. In the connection part by a hole and the said fitting part, it is good also as what has an angle fixing tool which fixes the angle which rotates the said antenna housing to a some prescription | regulation angle. With the configuration having the angle fixing tool, the directivity direction of the antenna can be held in an optimum direction with respect to the installation position of the alarm device.

  An operation button for instructing a predetermined operation based on an external operation; and a pull string that is led out of the housing and interlocks with the operation button, and the pull string is led out of the antenna. It may be a part. As a result, a member for leading the antenna to the outside is not necessary, and the pulling string hangs down by its own weight, so that the directivity direction of the antenna can be set to an optimum direction.

  In the alarm device described above, rotation of the antenna toward the mounting surface by the external lead-out portion may be restricted. Thereby, not only can the rotation of the antenna be controlled with respect to the region where the reception sensitivity of the antenna is deteriorated, but also the destruction of the antenna due to excessive rotation in the same direction can be prevented.

  According to the present invention, since the antenna directivity can be switched by changing the direction of the external lead-out portion of the antenna, the antenna directivity in the direction in which the sensitivity is improved even after the alarm is installed. Can be set easily. Moreover, since it is difficult to remove the antenna by making the antenna housing difficult to disassemble, it is possible to prevent modification of the antenna.

  In the following, an embodiment of the alarm device of the present invention will be described as a representative of those employed in the smoke detection alarm device shown in FIG. FIG. 1 is an external perspective view showing a configuration of an alarm device when the configuration of the present invention is adopted in the smoke detection alarm device shown in FIG. In the following, a smoke detection alarm device will be described as a representative. However, not only a smoke detection alarm device, but also a gas detection alarm device that issues an alarm when the amount of gas increases. The present invention can be similarly applied to a human body detection alarm device that issues an alarm when a suspicious person is detected.

  First, the configuration of the alarm device for smoke detection will be described with reference to an exploded perspective view of FIG. 19 and an external perspective view of FIG. First, as described above, the alarm device for detecting smoke shown in FIG. 19 includes an optical base 1 on which optical system components are mounted, a circuit board 2 on which various circuit components are mounted, and insects in the smoke detection chamber. And the like, a plate-like speaker 4 that sounds an alarm sound, a protective cover 5 that surrounds the insect-proof cover 3 and the plate-like speaker 4, and a housing 6 that contains the circuit board 2.

  The alarm device is configured so that the housing 6, the circuit board 2, the optical base 1, the insect cover 3, the speaker 4, and the protective cover 5 are arranged in this order when the installation surface of the housing 6 is set as a reference. Each member to be assembled is assembled. Further, the alarm device shown in FIG. 1 includes an antenna 7 connected to the circuit board 2 installed inside the housing 6 with respect to the alarm device shown in FIG. The configuration protrudes outward from the side.

  The housing 6 has a substantially disk-shaped base 60 whose back surface is fixed in contact with the installation surface, and a ring-shaped side wall 61 protruding from the outer peripheral edge of the base 60 in a direction away from the installation surface. The side wall 61 has an end portion covered by the base 60 and a substantially disc-shaped main portion 62 covering the opposite end portion. The main portion 62 of the housing 6 has a shape that rises in the direction opposite to the installation surface from the connection portion with the side wall 61 toward the center, and a circular opening 63 is formed at the center portion.

  The circuit board 2 is accommodated in the housing 6 having such a configuration. Then, by inserting the protective cover 5 in which the optical base 1, the insect-proof cover 3, and the speaker 4 are accommodated into the opening 63 of the housing 6, the optical base 1, the insect cover 3, and the speaker 4 are assembled in a state protruding from the opening 63. The main part 62 is configured to be removable. In the case where the main part 62 and the side wall 61 are integrally formed, the main part 62 and the side wall 61 integrally formed from the base 60 may be removable.

  When the main portion 62 is removable, first, the circuit board 2 fixed to the optical base 1 is fixed to a part of the casing 6 including the base 60 and the side wall 61, and the optical base 1, A member integrated by the circuit board 2, the insect cover 3, the speaker 4, and the protective cover 5 is disposed in a part of the housing 6. Then, the optical base 1, the circuit board 2, the insect-proof cover 3, the speaker 4, and the protective cover 5 are fixed by the housing 6 by assembling the housing 6 by connecting the main portion 62 to the side wall 61. it can.

  Moreover, as shown in FIG. 1, the housing 6 has an opening 64 in the side wall 61 into which the antenna 7 is inserted. The shape of the opening 64 formed in the side wall 61 is, for example, a U-shape or a substantially circular shape shown in FIG. As described above, when the circuit board 2 is assembled to the casing 6 including the base 60 and the side wall 61, the antenna 7 is inserted into the casing 6 through the opening 64, and the circuit board 2 is opened in the side wall 61. It is installed inside the housing 6 from the surface. Then, the antenna 7 is connected to the circuit board 2 fixed inside the housing 6 to fix the antenna 7.

  When the main part 62 and the side wall 61 are integrally formed, the opening 64 has a shape notched from the end that contacts the base 60, and the main part of the member integrally formed by the main part 62 and the side wall 61. From the opening surface opposite to 62, a member integrated by the optical base 1, the circuit board 2, the insect-proof cover 3, the speaker 4, and the protective cover 5 is inserted. At this time, the optical base 1, the circuit board 2, the insect-proof cover 3, the speaker 4, and the member integrated with the protective cover 5 are inserted so that the protective cover 5 protrudes from the opening 63 of the main part 62. Thereafter, a part of the antenna 7 is fitted into the opening 64, and a portion of the antenna 7 inserted inside the side wall 61 is connected to the circuit board 2 to fix the antenna 7. And the housing | casing 6 in which each component was integrated is assembled by covering the opening surface of the side wall 61 with the base 60. FIG.

  The circuit board 2 has a light emitting diode L constituting a light emitting element and a photodiode PD constituting a light receiving element mounted on a surface facing the optical base 1. 1 is connected to the circuit board 2, and a plurality of circuits such as a communication circuit that is electrically connected to the antenna 7 to perform wireless communication and a control circuit that controls the operation of each unit. Parts are mounted.

  The optical base 1 in which the smoke sensing chamber is configured includes a substantially disk-shaped bottom plate 11 and a peripheral wall 12 protruding toward the circuit board 2 at the edge of the bottom plate 11. A plurality of labyrinth walls 13 are provided on the surface of the bottom plate 11 facing the insect-proof cover 3 so as to surround the light-emitting unit and the light-receiving unit made of prism glass or the like. In addition, the optical base 1 is integrally formed with accommodating portions 14 and 15 that accommodate the light emitting diode L and the photodiode PD on the circuit board 2, respectively. Each of the accommodating portions 14 and 15 penetrates the bottom plate 11 of the optical base 1 and accommodates the light emitting diode L and the photodiode PD, thereby shielding the light emitting diode L and the photodiode PD from external noise. Can do.

  The insect repellent cover 3 has a structure having an insect repellent net 33 so that insects, dust and the like do not enter the smoke sensing chamber formed by the optical base 1. The outer frame 31 that holds the insect screen 33 is configured such that the end on the side facing the optical base 1 is fitted to the peripheral wall 12 of the optical base 1 and the opposite end. A round hole 32 for housing the speaker 4 is provided in the part.

  The speaker 4 is placed on the bottom 51 of the protective cover 5 and in a mounted state, the speaker 4 is fitted into the round hole 32 of the insect-proof cover. The protective cover 5 is formed in a bottomed cylindrical shape, and an opening 52a is formed in the peripheral wall 52 along the circumferential direction so that smoke flows from the opening 52a. The speaker 4 may be accommodated in the protective cover 5 in a state where the speaker 4 is fitted in the round hole 32 of the insect-proof cover 3.

  As shown in FIG. 1, the antenna 7 has a shape led out from the inside of the housing 6 to the outside of the housing 6 through an opening 64 provided in the side wall 61 of the housing 6. The antenna 7 includes an antenna housing 70 that covers an external lead-out portion of an antenna wire led out of the housing 6 outside the housing 6. Further, the antenna 7 is held by the housing 6 by the insertion portion of the opening 64 in the antenna housing 70 engaging the housing 6 at the opening 64.

  In the following embodiments, except for the twelfth embodiment, the configuration of the alarm device shown in FIG. 1 is a basic configuration. Therefore, in the first to eleventh embodiments, the description of the parts common to the configurations shown in FIGS. 1 and 19 is omitted, and the parts that are characteristic in each embodiment will be described in detail. Further, in the twelfth embodiment, detailed description will be given of characteristic portions different from the basic configuration of FIG.

<First Embodiment>
The alarm device of 1st Embodiment in this invention is demonstrated with reference to drawings. FIG. 2 is a schematic diagram showing the internal configuration of the alarm device in the present embodiment. In the configuration of the alarm device shown in FIG. 2, parts used for the same purpose as the configuration of the alarm device shown in FIGS. 1 and 19 are given the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 2, the antenna 7 provided in the alarm device of the present embodiment is derived from an external lead obtained by leading a metal wire 71 electrically connected to the circuit board 2 built in the housing 6 to the outside of the housing 6. It has a configuration in which a part 72 is provided and an open end 73 is provided in the external lead-out part 72. The external lead-out portion 72 has a spring shape (coil shape) in which the metal wire 71 is spirally wound a plurality of times. As the metal wire 71, for example, a phosphor bronze wire having a diameter of 0.6 mm, a piano wire having a diameter of 0.5 mm, or the like can be used. In this way, the external lead-out portion 72 provided on the open end 73 side of the metal wire 71 is a helical antenna having a spring shape, so that the metal wire 71 has a sufficient length and has a predetermined sensitivity during wireless communication. Not only can it be obtained, but the overall length of the external lead-out portion 72 can be shortened.

  The metal wire 71 includes a bent portion 74 that is bent in an L shape on the opposite side to the open end 73 of the external lead-out portion 72. By inserting the bent portion 74 into the housing 6 through the opening 64 of the housing 6, the end 75 of the metal wire 71 opposite to the open end 73 is guided into the housing 6. Further, the end portion 75 of the metal wire 71 is connected with a caulking metal fitting 76 to which a flexible electric wire 77 made of a copper twisted wire such as a 0.4 mm diameter polyurethane copper wire is connected. And the flexible electric wire 77 are electrically and physically connected via a caulking fitting 76. Further, the end portion of the flexible electric wire 77 opposite to the connection end with the caulking metal fitting 76 is connected to the circuit board 2 by the solder 78.

  With this configuration, when the antenna 7 is rotated about the straight line portion on the connection side of the bent portion 74 with the caulking fitting 76 as a central axis, the twist generated by the rotation of the metal wire 71 by the flexible wire 77 Is alleviated. Therefore, it is possible to prevent the connection portion by the solder 78 where the antenna 7 is connected to the circuit board 2 from being disconnected.

  Further, the antenna 7 constituted by the metal wire 71 connected to the circuit board 2 via the flexible electric wire 77 includes an antenna housing 70 that covers the external lead-out portion 72 and the bent portion 74 of the metal wire 71. In the antenna housing 70, a main portion 701 covering the external lead-out portion 72 has, for example, a substantially cylindrical shape having a diameter larger than that of the spring shape in the external lead-out portion 72, and the open end 73 of the external lead-out portion 72 is With covering end. Further, in order to cover the bent portion 74 with the antenna housing 70, a bent portion 702 is provided in which a substantially cylindrical portion covering the external lead-out portion 72 is bent in the same manner as the bent portion 74.

  In the antenna housing 70 configured as described above, the bent portion 702 includes an opening that leads the metal wire 71 to the outside of the antenna housing 70 at the end 703 opposite to the connection portion of the main portion 701. The end portion 703 of the bent portion 702 has a shape that is wider than the opening portion 64 provided on the side wall 61 of the housing 6, so that the portion perpendicular to the main portion 701 of the bent portion 702 becomes the opening portion 64. The antenna 7 is prevented from being detached from the housing 6 when fitted. In the bent portion 702, a groove having a width equal to the width of the side wall 61 is provided on the peripheral surface to be fitted to the opening 64, and the bent portion 702 is engaged with the opening 64 of the side wall 61 by this groove. Thus, the antenna 7 may be prevented from being detached from the housing 6.

The antenna housing 70 is made of, for example, ABS (Acrylonitrile) having the above-described shape.
Butadiene Styrene) may be configured by a hollow molded product case, or may be configured by simultaneous molding with the metal wire 71. Note that when the antenna housing 70 is formed by co-molding with the metal wire 71, the metal wire 71 is isolated from humidity and corrosive gas, so that the reliability of the antenna 7 is improved and the external force such as impact is also improved. Become stronger. As this simultaneous molding, for example, by using a hot melt method using a thermoplastic elastomer resin, the processing temperature and processing pressure can be lowered, and the metal wire 71 is molded without affecting the processing. can do. Further, in the case of a hollow molded product case, the cross-sectional shape of the main portion 701 is elliptical, and the external lead-out portion 72 is also spring-shaped by an ellipse, so that it can function as a guide that improves smoke inflow. .

  Further, in the antenna 7 including the antenna housing 70 configured as described above, a ring-shaped rubber 79 is attached to a fitting portion of the bent portion 702 of the antenna housing 70 with the opening 64 of the housing 6. That is, when the antenna 7 is assembled to the housing 6, the ring-shaped rubber 79 is applied to each of the outer peripheral surface of the bent portion 702 of the antenna housing 70 and the inner peripheral surface of the opening 64 provided in the side wall 61 of the housing 6. Abut. Therefore, the antenna 7 can be held at an arbitrary position by applying a predetermined frictional force by the ring-shaped rubber 79 attached to the antenna housing 70.

<Second Embodiment>
An alarm device according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a schematic diagram showing the internal configuration of the alarm device in the present embodiment. In the configuration of the alarm device shown in FIG. 3, portions used for the same purpose as the configuration of the alarm device shown in FIG. 2 are assigned the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 3, the antenna 7 provided in the alarm device of the present embodiment is different from the alarm device of the first embodiment (see FIG. 2) in that the redundant portion 77 a by the metal wire 71 is connected to the end of the bent portion 74. Provided on the 75 side, the end 75 of the metal wire 71 is connected to the circuit board 2 by the solder 78. Thereby, the caulking metal fitting 76 and the flexible electric wire 77 provided in order to make the antenna 7 rotatable in the first embodiment can be omitted from the configuration. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted.

  The redundant portion 77a, which is a characteristic portion in the antenna 7 of the alarm device of the present embodiment, is configured to have a configuration such as a shape wound once with a diameter of 15 mm on the end portion 75 side of the metal wire 71, for example. A function equivalent to that of the flexible wire 77 in the embodiment is provided. That is, when the antenna 7 is rotated around the straight line portion perpendicular to the external lead-out portion 72 of the bent portion 74, the torsional stress generated by the rotation is relaxed by the redundant portion 77a, and the metal wire 71 is caused by the solder 78. The disconnection from the connection portion with the circuit board 2 is prevented.

<Third Embodiment>
The alarm device of the 3rd Embodiment in this invention is demonstrated with reference to drawings. FIG. 4 is an external perspective view showing the configuration of the antenna used for the alarm device in the present embodiment. FIG. 5 is a cross-sectional view showing a configuration of an alarm device to which the antenna shown in FIG. 4 is assembled. In the configuration of the alarm device of the present embodiment, portions used for the same purpose as the configuration of the alarm device shown in FIG. 2 are assigned the same reference numerals and detailed description thereof is omitted.

  Unlike the alarm device of the first embodiment (see FIG. 2), the antenna 7 provided in the alarm device of the present embodiment has a round crimp terminal 78a for fixing to the circuit board 2 and the circuit board 2. It becomes the structure connected to the edge part of the connection side. Thereby, the solder 78 for fixing the antenna 7 to the circuit board 2 in the first embodiment can be omitted from the configuration. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted.

  The round crimp terminal 78 a provided on the antenna 7 is made of metal and has a ring-shaped terminal 782 on the opposite side to the crimp part 781 connected to the flexible wire 77, and the center of the ring-shaped terminal 782. Is provided with a through hole 783 into which the screw 78b shown in FIG. 5 is inserted. Further, as shown in FIG. 5, the circuit board 2 is provided with a through hole 21 into which the screw 78 b is inserted, and the housing 6 has a screw hole 62 a for holding the screw 78 b to be inserted in the main portion 62. Provided.

  With this configuration, the screw 78b is inserted into the through hole 783 of the round crimp terminal 78a, the through hole 21 of the circuit board 2, and the screw hole 62a of the main portion 62, and the screw 78b is inserted into the screw hole 62a. Thus, the antenna 7 can be fixed to the circuit board 2 and the housing 6. FIG. 5 exemplifies a configuration in which a conductor portion for performing electrical connection with the antenna 7 by a wiring pattern or a through hole is provided on a surface facing the base 60 of the circuit board 2. .

  That is, in the configuration of FIG. 5, the round crimp terminal 78 a, the circuit board 2, and the main part 62 are sequentially stacked from the base 60 side of the housing 6 toward the main part 62. The through holes 783 of the crimp terminal 78a, the through holes 21 of the circuit board 2, and the openings of the screw holes 62a of the main part 62 are made to coincide. Then, the screw 7b is passed through the through hole 783 of the round crimp terminal 78a and the through hole 21 of the circuit board 2 and locked in the screw groove of the screw hole 62a, so that the antenna 7 is connected to the circuit board 2 and the housing. Fasten together with 6.

  When a conductor portion for electrical connection with the antenna 7 is provided on the surface facing the main portion 62 of the circuit board 2, the casing 6 is directed from the base 60 side to the main portion 62. The circuit board 2, the round crimp terminal 78a, and the main portion 62 are sequentially stacked. Then, similarly to the case of the configuration of FIG. 5, the antenna 7 is fixed to the circuit board 2 and the housing 6 by performing fastening with screws 78 b.

  In this embodiment, since the antenna 7 can be fixed by the screw 78b, the antenna 7 can be assembled without using a device such as a solder hand as in the first embodiment, and the alarm device can be easily assembled. Can be. Furthermore, by fastening the antenna 7 together with the circuit board 2 and the housing 6 with the screw 78b, the screw 78b serves as a screw for fixing the circuit board 2 to the housing 6 and a screw for fixing the circuit board 2 to the circuit board 2. And the number of parts can be reduced.

  Further, by fastening the antenna 7 together with the housing 6, it is impossible to remove only the antenna 7 without disassembling the housing 6. Thereby, although low power wireless communication is used for wireless communication by the alarm device, it is possible to make the modification of the antenna 7 used as the antenna for low power wireless difficult.

  In addition, it is possible to apply the characteristic part in the alarm device (refer FIG. 3) of 2nd Embodiment with respect to the antenna 7 with which the alarm device of this embodiment is provided. That is, a redundant portion 77 a is provided on the end portion 75 side of the bent portion 74 of the metal wire 71 instead of the caulking metal fitting 76 and the flexible electric wire 77. In the present embodiment, the end portion 75 of the metal wire 71 provided with the redundant portion 77a is crimped by the crimp portion 781 of the round crimp terminal 78a, so that the screw 78b can be fixed to the housing 6. Antenna.

<Fourth Embodiment>
The alarm device of the 4th Embodiment in this invention is demonstrated with reference to drawings. FIG. 6 is a partial cross-sectional view of the alarm device showing the configuration of the antenna used for the alarm device in the present embodiment. FIG. 7 is a diagram for explaining the configuration of the connection portion of the antenna shown in FIG. 6 with the circuit board. In the configuration of the alarm device of the present embodiment, portions used for the same purpose as the configuration of the alarm device shown in FIG.

  As shown in FIG. 6, the antenna 7 provided in the alarm device of the present embodiment is different from the alarm device of the third embodiment (see FIG. 5), and instead of the round crimp terminal 78a, a circuit board is provided by screws 78b. 2 and a thin metal plate 78c connected together by fastening. Further, as shown in FIG. 7B, the antenna 7 includes a solder layer 78d sandwiched between the metal plate 78c and the circuit board 2 that are fastened together by screws 78b. The electrical connection between the circuit component and the wiring pattern to be connected is made more reliable.

  Further, in the metal plate 78 c in surface contact with the circuit board 2, the end opposite to the portion fixed to the circuit board 2 is inserted into the antenna housing 70 from the opening in the end 703, and the metal wire 71 Is connected to a cylindrical metal rod 74a. At this time, the rotating shaft 74b is provided at the tip of the end of the metal plate 78c inserted into the antenna housing 70. The rotation shaft 74b is inserted into the metal rod 74a, so that the metal rod 74a can rotate about the rotation shaft 74b, and the antenna 7 can rotate about the longitudinal direction of the metal plate 78c. . Since other configurations are the same as those of the third embodiment, detailed description thereof is omitted.

  In the antenna 7 configured as described above, the metal plate 78c and the metal rod 74a are each composed of a conductive metal such as brass. The metal rod 74a is provided with a structure that can always come into contact with the outer peripheral surface of the rotation shaft 74b at a portion where the rotation shaft 74b provided on the metal plate 78c is inserted. Instead, the metal plate 78c and the metal rod 74a can always be in an electrically connected state. Further, unlike the third embodiment, the metal wire 71 does not have the bent portion 74, and a part thereof is wound around the outer periphery of the metal rod 74a. The end of the metal wire 71 opposite to the open end 73 is fixed with solder or the like, and is electrically and structurally connected to the metal rod 74a.

  Details of the connection portion of the antenna 7 with the circuit board 2 will be described below with reference to FIG. 7A shows the state of the circuit board 2 before the antenna 7 is installed, and FIG. 7B shows the state of the circuit board 2 after the antenna 7 is installed. 7A and 7B, on the left side of the drawing, a surface view showing the surface of the circuit board 2 in contact with the metal plate 78c is shown, and on the right side of the drawing, a sectional view thereof is shown. Is illustrated. Furthermore, in the surface view of FIG.7 (b), it shows with the broken line about the screw | thread 78b and the metal plate 78c.

  As shown in FIG. 7A, in the present embodiment, the circuit board 2 has a plurality of through holes in order to make an electrical connection from the surface on which the metal plate 78c is fixed to the surface on which the circuit components are arranged. The hole 22 is provided around the through hole 21 into which the screw 78b is inserted. On the surface of the circuit board 2 on which the metal plate 78c is fixed, a solder layer 78d that is electrically connected to the through hole 22 is formed on the surface of the through hole 22 by, for example, a reflow method. In the reflow method, cream solder is applied to a position where the solder layer 78d is to be formed and then heated to dissolve the cream solder to form the solder layer 78d. The solder layer 78d formed at this time is formed so as not to reach the through hole 21.

  The circuit board 2 in which the solder layer 78d is formed on the through hole 22 in this way is installed so that the metal plate 78c of the antenna 7 is in surface contact with the circuit board 2 as shown in FIG. Then, the screw 78b is inserted into the through hole 783 of the metal plate 78c and the through hole 21 of the circuit board 2. Then, the antenna 7 is fastened together with the circuit board 2 and the housing 6 by fixing the screw 78b in the screw groove of the screw hole 62a of the main part 62.

  At this time, a force acts in a direction in which the circuit board 2 and the metal plate 78c come into contact with each other by the tightening force by tightening the screw 78b, and the solder layer 78d sandwiched between the circuit board 2 and the metal plate 78c is formed. A force to make close contact with the metal plate 78c and the through hole 22 works. Therefore, not only the solder layer 78d is in close contact with each of the metal plate 78c and the through hole 22, but also the solder layer 78d becomes thin and extends in the radial direction, so that the electrical connection by the solder layer 78d becomes good.

  As described above, by tightening the screw 78b, the installation surface of the solder layer 78d spreads on the surface of the circuit board 2, but it is desirable not to reach the through hole 21. When reaching the through hole 21, an insulating layer is provided on the inner peripheral surface of the through hole 21 in order to insulate the screw 78 b on the surface opposite to the surface on which the metal plate 78 c of the circuit board 2 is installed. Is desirable. Alternatively, at least the outer peripheral surface of the portion inserted into the through hole 21 of the screw 78b may be formed of an insulating material.

  Also in this embodiment, as shown in the configuration of FIG. 6, the metal plate 78 c, the circuit board 2, and the main portion 62 are sequentially arranged from the base 60 side of the housing 6 toward the main portion 62. The antenna 7 is fixed to the circuit board 2 and the housing 6 with the screws 78b being overlapped with each other. If the solder layer 78d is provided between the circuit board 2 and the metal plate 78c, This is not a limitation. That is, as described in the third embodiment, the circuit board 2, the metal plate 78 c, and the main portion 62 are sequentially stacked from the base 60 side of the housing 6 toward the main portion 62. As above, the screws 78b may be fastened together.

  Further, when the metal plate 78c is fixed on the same surface of the circuit board 2 as the wiring pattern electrically connected to the antenna 7, the through hole 22 as shown in FIG. 7 is omitted and only the solder layer 78d is used. An electrical connection may be made. Thus, when the metal plate 78c is directly connected to the wiring pattern on the circuit board 2 without passing through the through hole 22, the solder layer 78d is applied on the wiring pattern on the circuit board 2 connected to the metal plate 78c. Is done. Further, the through hole 22 and the wiring pattern in which the solder layer 78d is applied to the surface may not be around the through hole 21 into which the screw 78b is inserted, but in order to apply the tightening force by the screw 78b, It is preferable to be provided at a position close to the through hole 21.

  Further, in the present embodiment, the rotating shaft 74b provided on the metal plate 78c is inserted into the metal rod 74a connected to the open end 73 of the metal wire 71 on the opposite side, whereby the bent portion 74 in the third embodiment. However, the present invention is not limited to this configuration. That is, as with the alarm device of the first embodiment, a metal plate having a through hole 783 through which the screw 78b passes may be connected to the flexible electric wire 77 connected to the metal wire 71 by the caulking metal fitting 76. Alternatively, as in the second embodiment, a redundant portion 77a may be provided in the metal wire 71, and a metal plate provided with a through hole 783 may be connected to the end 75 of the redundant portion 77a. At this time, in the present embodiment, the solder layer 78d is formed so as to be sandwiched between the metal plate and the circuit board 2 that are fastened together by the screws 78b.

<Fifth Embodiment>
The alarm device of 5th Embodiment in this invention is demonstrated with reference to drawings. FIG. 8 is a schematic diagram showing the internal configuration of the alarm device in the present embodiment. In the configuration of the alarm device shown in FIG. 8, parts used for the same purpose as the configuration of the alarm device shown in FIG.

  As shown in FIG. 8, unlike the alarm device of the first embodiment (see FIG. 2), the antenna 7 provided in the alarm device of this embodiment holds the end 75 side of the bent portion 74 of the metal wire 71. Thus, a terminal 77 b electrically connected to the antenna 7 is provided, and the terminal 77 b is fixed to the circuit board 2 with solder 78. Thereby, like the second embodiment, the caulking metal fitting 76 and the flexible electric wire 77 provided for enabling the antenna 7 to rotate in the first embodiment can be omitted from the configuration. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted.

  Thus, in the present embodiment, the end portion 75 of the bent portion 74 introduced into the housing 6 is sandwiched between the terminals 77b, so that the straight line on the end portion 75 side of the bent portion 74 is centered. The metal wire 71 is rotatable as an axis. That is, even if the metal wire 71 rotates about the straight line on the end portion 75 side of the bent portion 74 as the central axis, the inner side of the terminal 77b contacts the outer peripheral surface on the end portion 75 side of the metal wire 71. And the terminal 77b are maintained in electrical connection.

  Since the configuration around the antenna 7 is the configuration of the alarm device of the present embodiment, when the antenna 7 is assembled to the housing 6, the metal wire 71 is inserted into the terminal 77 b from the end portion 75 side, whereby the terminal The metal wire 71 can be sandwiched between 77 b and the antenna 7 can be electrically connected to the circuit board 2. As a result, after the circuit board 2 is fixed to the housing 6, the work of connecting the antenna 7 to the circuit board 2 with the solder 78 or the screw 78b becomes unnecessary as in the first to third embodiments. Assembly can be simplified.

  In addition, it is possible to apply the characteristic part in the alarm device (refer FIG.4 and FIG.5) of 3rd Embodiment with respect to the antenna 7 with which the alarm device of this embodiment is provided. That is, a through hole 783 similar to the round crimp terminal 78 a is provided on the connection side of the terminal 77 b to the circuit board 2. Instead of the solder 78, screw holes 62 a and through holes provided in the housing 6 and the circuit board 2, respectively. Screws 78 b are inserted into the through holes 783 together with the holes 21 to fasten the terminals 77 b together with the housing 6 and the circuit board 2. The antenna 7 is electrically connected to the circuit board 2 and can be rotated by sandwiching the metal wire 71 of the antenna 7 with the terminal 77b fastened together with the screw 78b in this manner. . Further, as in the alarm device of the fourth embodiment, a solder layer 78c may be provided at a joint fastening portion with the circuit board 2 by a screw 78b.

<Sixth Embodiment>
The alarm device of 6th Embodiment in this invention is demonstrated with reference to drawings. FIG. 9 is a schematic diagram showing the internal configuration of the alarm device in the present embodiment. In the configuration of the alarm device shown in FIG. 9, portions used for the same purpose as the configuration of the alarm device shown in FIG. 2 are given the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 9, the antenna 7 provided in the alarm device of the present embodiment is different from the alarm device of the first embodiment (see FIG. 2) from a copper stranded wire such as a 0.4 mm diameter polyurethane copper wire. A spring-shaped helical antenna wound a plurality of times in a spiral shape is configured by the flexible electric wire 71a. In addition, a cylindrical coil bobbin 704 along the longitudinal direction of the main portion 701 is installed at a central position inside the main portion 701 of the antenna housing 70 in order to form a helical antenna by winding the flexible wire 71a. The

  An end 75a opposite to the open end 73 of the flexible wire 71a wound around the coil bobbin 704 is introduced into the housing 6 from an opening provided in the end 703 of the antenna housing 70, and soldered. 78 is connected to the circuit board 2. Thereby, like the second embodiment, the caulking metal fitting 76 and the flexible electric wire 77 provided for enabling the antenna 7 to rotate in the first embodiment can be omitted from the configuration. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted.

  In the alarm device configured as described above, the coil bobbin 704 is made of an insulating material such as a resin material typified by ABS, and has a groove 705 provided in a spiral shape on the outer peripheral surface thereof. And the flexible electric wire 71a is wound along the groove | channel 705 of the coil bobbin 704, and the external derivation | leading-out part 72a similar to the external derivation | leading-out part 72 in the alarm device in 1st Embodiment is formed.

  The coil bobbin 704 around which the flexible electric wire 71 a is wound may be simultaneously molded with the antenna housing 70. Further, by providing a structure for holding the coil bobbin 704 in the main part 701 of the antenna housing 70 which is separately molded as a molded product case, the coil bobbin 704 around which the flexible electric wire 71a is wound is stored in the hollow part of the main part 701. It is good also as what makes it.

  Further, in the flexible electric wire 71a, the portion between the end portion of the coil bobbin 704 on the bent portion 702 side of the antenna housing 70 and the end portion 75a fixed to the circuit board 2 with the solder 78 is the first embodiment. The same operation as that of the flexible electric wire 77 in FIG. That is, when the antenna 7 is rotated with the axis on the end 703 side of the bent portion 702 of the antenna housing 70 as the central axis, the flexible electric wire 71a relaxes the twist caused by this rotation, so that it is more flexible than the circuit board 2. It is possible to prevent the conductive wire 71a from coming off.

  In addition, it is possible to apply the characteristic part in the alarm device (refer FIG.4 and FIG.5) of 3rd Embodiment with respect to the antenna 7 with which the alarm device of this embodiment is provided. That is, the crimp part 781 of the round crimp terminal 78a is connected to the end part 75a of the flexible wire 71a. Then, the screw 78b is inserted into the through hole 783 together with the screw hole 62a and the through hole 21 provided in the housing 6 and the circuit board 2, respectively, so that the flexible electric wire 71a of the antenna 7 is shared with the housing 6 and the circuit board 2. Tighten. Further, as in the alarm device of the fourth embodiment, a solder layer 78c may be provided at a joint fastening portion with the circuit board 2 by a screw 78b.

<Seventh Embodiment>
The alarm device of 7th Embodiment in this invention is demonstrated with reference to drawings. FIG. 10 is an exploded perspective view showing the configuration of the antenna used for the alarm device in the present embodiment. In the configuration of the antenna shown in FIG. 10, parts used for the same purpose as the configuration of the antenna shown in FIG.

  As shown in FIG. 10, the antenna 7 provided in the alarm device of the present embodiment has a helical antenna constituted by a metal wire 71 unlike the alarm device of the third embodiment (see FIGS. 4 and 5). The antenna element 700 is constituted by housing members 70a and 70b having a shape obtained by dividing the antenna housing 70 covering the antenna element 700 into two parts. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted. The antenna element 700 includes a flexible wire 77 connected to the tip 75 of the bent portion 74 of the metal wire 71 via a caulking metal fitting 76 and a round crimp terminal 78a. The configuration is the same as that of the embodiment.

  The housing components 70a and 70b in the antenna 7 having such a configuration will be described below. The housing parts 70a and 70b have a symmetrical shape with respect to a plane formed by the bent portion 74 of the metal wire 71 in the antenna element 700, and are grooves for forming a hollow portion for containing the antenna element 700. 700a, 700b. The grooves 700a and 700b are bent at the bent portion 702 in accordance with the shape of the bent antenna element 700, and an opening 703a for forming an opening at the end 703. , 703b.

  With this configuration, when the antenna housing 70 is formed by joining the divided surfaces of the housing components 70a and 70b, a hollow portion that encloses the antenna element 700 is formed by the grooves 700a and 700b. The opening portions 703a and 703b form an opening in the end portion 703 that leads the round crimp terminal 78a side of the antenna element 700 to the outside of the antenna housing 70. The grooves 700a and 700b form a lid for covering the open end 73 side of the antenna element 700, and the front end side of the main portion 701 of the antenna housing 70 is an end portion 703 formed by the opening portions 703a and 703b. Unlike the side, it has a closed shape.

  In addition, a support portion 741 for holding the bent portion 74 of the metal wire 71 of the antenna element 700 is provided on one of the housing components 70a and 70b. In addition, in the example of FIG. 10, in order to hold | maintain the edge part 703 side of the bending part 74, it is set as the structure by which the support part 741 protruded from the groove | channel 700b was provided in the components 70b for housings. And this support part 741 is formed by two plate-shaped projection parts so that the bending part 74 of the metal wire 71 can be clamped up and down when the open end 73 is the top. Further, when the projecting support portion 741 is provided in the housing component 70b, the housing component 70a may be provided with an engagement hole for engaging the support portion 741.

  Furthermore, in order to fix when the antenna housing 70 is assembled by joining the divided surfaces of the housing components 70a and 70b, one of the housing components 70a and 70b has a hook-shaped tip and is a latch that is killed. The claws 701a and 702a to 702c are provided, and an engagement hole (not shown) for engaging the latch claws 701a and 702a to 702c is provided on the other of the housing parts 70a and 70b. In addition, in FIG. 10, it is set as the structure by which latch claw 701a, 702a-702c was provided in the components 70b for housings. At this time, the housing part 70a is provided with an engagement hole at a position corresponding to the latch claws 701a and 702a to 702c.

  The latch claws 701a and 702a to 702c that are fixed when the housing components 70a and 70b are assembled are provided at positions as shown in FIG. 10, for example, so that the assembled antenna housing 70 is difficult to disassemble. . That is, in FIG. 10, the latch claw 701 a is disposed on the distal end side of the main portion 701 of the antenna housing 70, and the latch claw 702 b is disposed on the opposite side of the bent portion 702 of the antenna housing 70 from the end portion 703 at the bending start portion from the main portion 701. Latch pawls 702a and 702c at positions where the antenna element 700 of the bent portion 702 of the antenna housing 70 is bent vertically from the main portion 701 (when the open end 73 of the metal wire 71 is on the upper side), respectively. Provide.

  With this configuration, the antenna elements 700 are fitted into the grooves 700a and 700b, and the housing components 70a and 70b are assembled from both sides with the antenna element 700 as the center. Then, by bringing the divided surfaces of the housing components 70a and 70b into contact with each other, the latch claws 701a and 702a to 702c are engaged with the engagement holes, and the antenna housing 70 including the antenna element 700 is assembled.

  Therefore, the antenna element 700 can be easily inserted into the antenna housing 70 assembled by the housing parts 70a and 70b, which are divided molded products, and the latch claws 701a and 702a to 702c are engaged after the assembly. Therefore, the assembly can be simplified. Further, by making the latch claws 701a, 702a to 702c into a closed structure, the assembled antenna housing 70 cannot be easily disassembled, and the antenna 7 can be difficult to be modified.

  In the configuration shown in FIG. 10, the support portion 741 having a shape protruding from the groove 700 b is also formed in the same shape as the latch claws 701 a and 702 a to 702 c and has a function of preventing the antenna housing 70 from being disassembled. Also good. In addition, the latching claws 701 a and 702 a to 702 c may be hooked at the tip of the claw to be engaged after the antenna housing 70 is assembled.

  Further, in this embodiment, the antenna housing 70 is configured by two members as shown in FIG. 10. However, if the antenna housing 70 is configured so as not to be disassembled using a latch claw or the like, three or more members are used. The antenna housing 70 may be configured by a plurality of members. As another example of forming the antenna housing 70 by a plurality of members in this way, an example of FIG. 11 constituted by three members will be described below. FIG. 11A is an exploded perspective view showing the structure of each member constituting the antenna housing 70 in this example, and FIG. 11B is the structure after assembling the members shown in FIG. It is a perspective view when cut | disconnecting in the surface parallel to the edge part 703 which shows.

  In this example, as shown in FIG. 11A, a cap-shaped housing member 70x that forms the main portion 701 of the antenna housing 70 and a housing member 70y that has a shape obtained by dividing the bent portion 702 of the antenna housing 70 into two parts. As a result, the antenna housing 70 is formed. The antenna housing 70 x includes a hollow portion 701 b into which the external lead-out portion 72 in the antenna element 700 is inserted from the open end 73.

  In addition, the end of the antenna housing 70x opposite to the end covering the open end 73 has a diameter smaller than the outer diameter of the main portion 701 and can be sandwiched by the housing members 70y and 70z. A portion 701c is formed. Further, by widening the outer diameter of the end surface 701d having an opening surface in the insertion portion 701c, the antenna housing 70x can be engaged with the bent portion 702 assembled by the housing members 70y and 70z. . Since the main portion 701 is integrated, the latch claw 701a in FIG. 10 is omitted in this example.

  On the other hand, the housing members 70y and 70z have a symmetrical shape with respect to the plane formed by the bent portion 74 of the metal wire 71, as in the example of FIG. The latch claws 702a to 702c and the support portion 741 are provided in any one of the housing members 70y and 70z. Each of the housing members 70y and 70z has a shape in which the end portions 702y and 702z opposite to the end portion 703 constituting the opening surface are also opened, and the insertion portions of the housing member 70x are inserted by the end portions 702y and 702z. 701c is sandwiched.

  Further, a groove having a shape along the outer diameter of the end surface 701d is formed on the inner wall surface of each of the end portions 702y and 702z at a position where the end surface 701d of the insertion portion 701c contacts, and the end surface 701d is sandwiched between the grooves. Therefore, when the insertion portion 701c of the housing member 70x is sandwiched between the end portions 702y and 702z of the housing members 70y and 70z, the insertion portions 702c are inserted into the grooves provided in the end portions 702y and 702z as shown in FIG. The end surface 701d of the portion 701c is fitted, and the housing member 70x is engaged with the housing members 70y and 70z.

  The antenna 7 is assembled in the following manner by the housing members 70x to 70z configured as described above and the antenna element 700. That is, first, the antenna element 700 is inserted into the hollow portion 701b through the opening of the end surface 701d of the housing member 70x, and the housing member 70x into which the antenna 700 is inserted is sandwiched between the housing members 70y and 70z from both sides.

  At this time, the bent portion 74 of the metal wire 71 is sandwiched between the support portions 741 and the insertion portion 701c of the housing member 70x is sandwiched between the end portions 702y and 702z so that the divided surfaces of the housing members 70y and 70z are formed. Make contact. As a result, the latch claws 702a to 702c engage with the engagement holes, whereby the antenna housing 70 having a structure that is difficult to disassemble is assembled, and the antenna 7 is formed by the antenna housing 70 and the antenna element 700.

  In addition, it is possible to apply combining the characteristic part in the alarm device of 1st, 2nd, 5th, or 6th Embodiment with respect to the antenna 7 with which the alarm device of this embodiment is provided. That is, when applying the characteristic part of the first embodiment, it is fixed to the circuit board 2 with the solder 78 instead of the round crimp terminal 78a, and the characteristic part of the second or fifth embodiment is applied. In the case where the caulking metal fitting 76 and the flexible electric wire 77 are excluded, and the characteristic portion of the sixth embodiment is applied, the antenna element 70 is constituted by the flexible electric wire 71a wound around the coil bobbin 704. The feature portions in the respective embodiments can be applied. Further, as in the alarm device of the fourth embodiment, a solder layer 78c may be provided at a joint fastening portion with the circuit board 2 by a screw 78b.

<Eighth Embodiment>
The alarm device of the 8th Embodiment in this invention is demonstrated with reference to drawings. FIG. 12 is an exploded perspective view showing the configuration of the antenna used for the alarm device in the present embodiment. FIG. 13 is a cross-sectional view for explaining the configuration of the antenna housing in the antenna shown in FIG. In the configuration of the antenna shown in FIG. 12, parts used for the same purpose as the configuration of the antenna shown in FIG. 10 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 12, unlike the alarm device of the seventh embodiment (see FIG. 10), the antenna 7 provided in the alarm device of the present embodiment is a housing member 70p, 70q integrated by ultrasonic welding. Thus, the antenna housing 70 is assembled. Since other configurations are the same as those of the seventh embodiment, detailed description thereof is omitted. The housing members 70p and 70q have the same shape as the housing components 70a and 70b shown in FIG. 10 in the seventh embodiment, and the latch claws 701a and 702a to 702c and the engagement holes are removed. Become.

  As shown in FIG. 13, the housing members 70 p and 70 p are provided with a convex portion 702 p on one side and a concave portion 702 q into which the convex portion 702 p is inserted on the other side in the cross section contacting each. That is, in the example of FIG. 13, when bonding the divided sections of the housing members 70p and 70q, the outer surface of the convex portion 702p provided on the housing member 70p is along the inner surface of the concave portion 702q provided on the housing member 70q. To be guided.

  Therefore, the rib 702r that forms the inner surface of the recess 702q functions as a positioning rib, and the housing members 70p and 70q are assembled at a fixed position determined by the projection 702p and the recess 702q. The rib 702r also functions to prevent the adhesive used for ultrasonic welding from protruding outside the housing members 70p and 70q.

  Furthermore, by projecting the outer surface of the convex portion 702p provided on the housing member 70p in a direction perpendicular to the sectional surface of the housing member 70p, a welding rib 702s that functions as an adhesive during ultrasonic welding is formed. The Therefore, when the housing members 70p and 70q are assembled so that the cross sections of the housing members 70p and 70q come into contact with each other, ultrasonic welding using the welding rib 702s is performed, so that the projection surface of the convex portion 702p is welded to the bottom surface of the concave portion 702q. The Rukoto.

  Thus, according to the present embodiment, the housing members 70p and 70q can be bonded using ultrasonic welding to assemble the antenna housing 70, so that the appearance is good and the bonding strength can be increased. In addition, waterproof performance can be added by appropriately welding the entire circumference. Further, similarly to the seventh embodiment, the assembled antenna housing 70 cannot be easily disassembled, and the modification of the antenna 7 can be made difficult.

  In the present embodiment, as in the seventh embodiment, the antenna housing 70 is assembled by a plurality of members such as three members having the same shape as the housing components 70x to 70z as shown in FIG. Also good. Further, when assembling with three members having the same shape as the housing parts 70x to 70z in FIG. 11, only two members corresponding to the housing parts 70y and 70z constituting the bent portion 702 of the antenna housing 70 are ultrasonically welded. Alternatively, all three members corresponding to the housing components 70x to 70z may be ultrasonically welded. Further, in the present embodiment as well, as in the seventh embodiment, it is possible to apply to a combination of the characteristic parts of the alarm devices in the first to sixth embodiments.

<Ninth Embodiment>
An alarm device according to a ninth embodiment of the present invention will be described with reference to the drawings. FIG. 14 is a schematic diagram showing the internal configuration of the alarm device in the present embodiment. FIG. 15 is a schematic view showing the state of the antenna with respect to the place where the alarm device is installed in this embodiment. In the configuration of the alarm device shown in FIG. 14, portions used for the same purpose as the configuration of the alarm device shown in FIG. 2 are assigned the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 14, the antenna 7 provided in the alarm device of the present embodiment is different from the alarm device of the first embodiment (see FIG. 2) in that the main portion 701 of the antenna housing 70 is open in the metal wire 71. A weight 706 made of stainless steel or the like is provided at the tip on the end 73 side. Further, in the alarm device of the first embodiment, except for the ring-shaped rubber 79 provided at the fitting portion between the bent portion 702 of the antenna housing 70 and the opening 64 of the housing 6, the antenna housing 70 is the housing. 6 with a low friction and free rotation. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted.

  In such a configuration, it is preferable to use a material having a large specific gravity and non-magnetic as the weight 706. The weight 706 installed on the open end 73 side of the metal wire 71 may be simultaneously molded together with the antenna housing 70. Further, the weight 706 may be accommodated in the distal end side of the hollow portion of the main portion 701 by providing a structure for holding the weight 706 in the main portion 701 of the antenna housing 70 separately molded as a molded product case. The antenna housing 70 itself that becomes a molded case may be assembled in advance. Further, when the antenna housing 70 is a molded product case, the antenna housing 70 may be assembled with a plurality of parts as in the seventh or eighth embodiment (FIGS. 10 to 13).

  In the present embodiment, a weight 706 is provided at the tip of the antenna housing 70, and the antenna housing 70 is configured to be free of rotation with low friction with respect to the housing 6, so that the weight is set according to the installation position of the alarm device. The antenna 7 automatically rotates to a stable position due to the gravity of 706. The antenna 7 is automatically adjusted so that the longitudinal direction of the main portion 701 of the antenna housing 70 is perpendicular to the floor surface regardless of the installation location such as the ceiling, the oblique ceiling, and the wall. .

  That is, when the alarm device is installed on the ceiling surface, the base 60 of the housing 6 is installed so as to contact the ceiling surface. At this time, since the antenna 7 is rotated to the position where the front end (open end 73 side) of the antenna housing 70 is directed to the floor surface by being induced by gravity acting on the weight 706, as shown in FIG. The longitudinal direction of the main portion 701 of the housing 70 is perpendicular to the installation surface of the base 60 serving as the installation surface. Further, when the alarm device is installed on a wall surface perpendicular to the floor surface, the base 60 of the housing 6 is installed so as to contact the wall surface. At this time, when the antenna 7 rotates to a position where the tip of the antenna housing 70 faces the floor surface due to gravity acting on the weight 706, the longitudinal direction of the main portion 701 of the antenna housing 70 is set as shown in FIG. It becomes parallel to the installation surface of the base 60 which becomes a surface.

  Thus, in the present embodiment, the antenna 7 is fixed so that the longitudinal direction of the main portion 701 in the antenna housing 70 is perpendicular to the floor surface, regardless of the mounting location of the alarm device. The direction is adjusted automatically. That is, in a helical antenna in which the metal wire 71 is coiled like the external lead-out portion 72, an omnidirectional polarization plane is formed in a direction perpendicular to the longitudinal direction of the antenna. The omnidirectional polarization plane is most preferably matched to the width direction of the room. Therefore, in the alarm device of the present embodiment, the omnidirectional polarization plane by the antenna 7 can be automatically guided in a desired direction regardless of the installation location.

  In addition, it is possible to apply the characteristic part in the alarm device (refer FIG.3 and FIG.8) of 2nd or 5th embodiment with respect to the antenna 7 with which the alarm device of this embodiment is provided. That is, instead of the caulking metal fitting 76 and the flexible electric wire 77, the redundant portion 77a may be provided on the end portion 75 side of the metal wire 71 as in the second embodiment. As described above, the terminal 77 b that sandwiches the end 75 side of the metal wire 71 may be installed on the circuit board 2.

  Moreover, it is possible to apply the characteristic part in the alarm device of 6th Embodiment (refer FIG. 9) with respect to the antenna 7 with which the alarm device of this embodiment is provided. That is, instead of the metal wire 71, the caulking metal fitting 76, and the flexible electric wire 77, a helical antenna is configured by the flexible electric wire 71a wound around the coil bobbin 704 as in the sixth embodiment. It doesn't matter.

  Furthermore, the characteristic part in the alarm device of 3rd and 4th embodiment (refer FIGS. 4-7) is applied with respect to the antenna 7 with which the alarm device of this embodiment is provided similarly to other embodiment mentioned above. It is also possible. That is, when applying the characteristics of the third embodiment, a round crimp terminal 78a is connected to the end of a flexible wire or metal wire forming the antenna 7, and a screw 78b penetrating the round crimp terminal 78a. Thus, the antenna 7 is fastened together with the circuit board 2 and the housing 6. In addition, when the features of the fourth embodiment are applied, a solder layer 78c is further provided at a joint fastening portion with the circuit board 2 by the screw 78b.

<Tenth Embodiment>
The alarm device of 10th Embodiment in this invention is demonstrated with reference to drawings. FIG. 16 is a schematic diagram showing the configuration of the alarm device in the present embodiment excluding the antenna and the relationship between the shape of the opening into which the antenna is inserted and the antenna housing. In the configuration of the alarm device shown in FIG. 16, portions used for the same purpose as the configuration of the alarm device shown in FIG. 2 are assigned the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 16A, the housing 6 of the alarm device of the present embodiment has an opening 64a instead of the opening 64 of the side wall 61 in the alarm device of the first embodiment (see FIG. 2). The angle fixing tool 65 is provided on the side wall 61. The antenna housing 70 of the antenna 7 is fitted in the bent portion 702 to the opening 64 a of the angle fixture 65. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted.

  In the angle fixture 65 provided in the housing 6, as shown in FIG. 16 (b), the shape of the opening 64a is substantially half with the arc portion on the main portion 62 side and the linear portion on the base 60 side. Circular shape. And the protrusion part 651 which protruded toward the center of the opening part 64a from the inner wall surface of the angle fixing tool 65 which forms the opening part 64a is provided in the top part of the circular arc part in this opening part 64a. That is, the protruding portion 651 has a shape protruding in the direction perpendicular to the installation surface of the base 60 from a position farthest from the installation surface of the base 60 of the housing 6 in the opening 64a.

  In the angle fixing tool 65, a bearing portion 650 is formed by a concave portion that forms an arc having a smaller radius and symmetry than the arc portion of the opening 64a at the center position of the straight portion in the opening 64a. The bearing portion 650 of the angle fixture 65 supports the bent portion 702 of the antenna housing 70 and guides the rotation of the antenna 7.

  And the bending part 702 of the antenna housing 70 fitted to the opening part 64a of this angle fixing tool 65 is equipped with the rotating shaft 720 with which an outer peripheral surface contact | abuts to the bearing part 650, as shown in FIG.16 (b), A plurality of grooves 721 having the same shape as the protrusions 651 are formed on the outer peripheral surface of the rotating shaft 720. At this time, each of the arc forming the bearing portion 650 and the circle serving as the cross section of the rotating shaft 720 has the same center and substantially the same diameter.

  By configuring the angle fixing tool 65 and the bent portion 702 of the antenna housing 70 in this way, the projection 651 of the angle fixing tool 65 and the groove 721 of the bent portion 702 have an angle of the antenna 7 with respect to the installation surface of the alarm device. Functions as a member for fixing the angle. That is, when the antenna 7 is rotated about the rotation shaft 720 by rotating the outer peripheral surface of the rotation shaft 720 along the inner peripheral surface of the bearing portion 650, a groove provided on the outer peripheral surface of the rotation shaft 720. Each time the protrusion 651 of the angle fixing tool 65 is fitted to 721, the rotation of the antenna 7 is restricted. Thereby, not only the setting of the angle of the antenna 7 with respect to the installation surface of the alarm device is simplified, but also the direction of the antenna 7 is difficult to change due to vibration and impact.

  In FIG. 16B, the five grooves 721 are provided on the arc portion side of the opening 64a so that the angle between the adjacent grooves 721 is 45 degrees. For example, the angle between adjacent grooves 721 may be 30 degrees and the seven grooves 721 may be provided as long as the antenna 7 does not tilt to the side. Further, when the groove 721 is formed as shown in FIG. 16B, the longitudinal angle of the main portion 701 in the antenna housing 70 with respect to the installation surface of the alarm device is 0 degrees, 45 degrees, and 90 degrees. The angle of the antenna 7 can be fixed.

  Moreover, it is possible to attach the antenna 7 which combined the characteristic part in 2nd-8th embodiment with respect to the alarm device of this embodiment. That is, in the antenna 7 provided with a combination of the characteristic portions in the second to eighth embodiments, the rotating shaft 720 having the groove 721 shown in FIG. In addition to the effects in the present embodiment, the effects in the second to eighth embodiments can be obtained.

<Eleventh embodiment>
An alarm device according to an eleventh embodiment of the present invention will be described with reference to the drawings. FIG. 17 is a schematic diagram showing the configuration of the alarm device in the present embodiment excluding the antenna, and the relationship between the shape of the opening into which the antenna is inserted and the antenna housing. In the configuration of the alarm device shown in FIG. 17, portions used for the same purpose as the configuration of the alarm device shown in FIG. 16 are given the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 17 (a), the housing 6 of the alarm device of the present embodiment has an opening instead of the angle fixture 65 provided on the side wall 61 in the alarm device (see FIG. 16) of the tenth embodiment. An angle restricting tool 66 having a portion 64 b is provided on the side wall 61. The antenna housing 70 of the antenna 7 fitted in the opening 64b of the angle restricting tool 66 includes a protrusion 722 that protrudes outward from the outer peripheral surface of the outer peripheral surface of the rotating shaft 720 of the bent portion 702. . Since other configurations are the same as those in the tenth embodiment, detailed description thereof is omitted.

  As shown in FIG. 17B, the shape of the opening 64b provided in the angle restricting tool 66 provided in the housing 6 is substantially half with the arc portion on the main portion 62 side and the linear portion on the base 60 side. It becomes a circular shape. Unlike the opening 64a (see FIG. 16B) provided in the angle fixing tool 65 in the tenth embodiment, the opening 64b is not formed with the protrusion 651.

  Similarly to the angle fixing tool 65, the angle restricting tool 66 is formed with a bearing portion 650 serving as a recess at the center position of the straight line portion in the opening 64b, and the bearing portion 650 supports the bent portion 702 and the antenna 7. Induction of rotation is achieved. Further, the inner wall other than the bearing portion 650 functions as an angle restricting portion 661 for restricting the rotation angle of the antenna 7 in the linear portion of the opening 64b.

  The bent portion 702 that fits into the opening 64b of the angle restricting tool 66 has an outer periphery at the fitting portion with the opening 64b, similarly to the bent portion 702 (see FIG. 16B) in the embodiment of FIG. A rotating shaft 720 whose surface abuts against the inner peripheral surface of the bearing portion 650 is provided. In addition, unlike the bent portion 702 in the embodiment of FIG. 11, a protruding portion that protrudes in a direction parallel to the longitudinal direction of the main portion 701 of the antenna housing 70 on the outer peripheral surface of the rotating shaft 720 instead of the groove 721. 722 is provided.

  As described above, the angle restricting member 66 is provided with the angle restricting portion 661, and the protrusion 722 is provided on the outer peripheral surface of the rotating shaft 720 of the bent portion 702, whereby the angle restricting member due to the action of the angle restricting portion 661 and the protrusion 722. Is formed. That is, the length from the center of the cross section of the rotating shaft 720 to the apex of the protrusion 722 is shorter than the diameter of the arc portion of the opening 64b centered on the center of the cross section of the rotating shaft 720. The angle at which the shaft 720 can rotate is restricted within a range in which the protrusion 722 does not contact the angle restricting portion 661.

  Therefore, the direction in which the protruding portion 722 is protruded is a direction parallel to the longitudinal direction of the main portion 701 of the antenna housing 70, and the inner wall surface of the angle regulating portion 661 is parallel to the installation surface of the alarm device. The rotation angle is restricted so that it cannot rotate to the opposite side of the installation surface. Further, by restricting the rotation angle of the antenna 7, excessive rotation of the antenna 7 in the same direction can also be restricted. Thereby, for example, when the flexible electric wire 77 is used for the connection between the antenna 7 and the circuit board 2 as in the configuration of the first embodiment, the flexible electric wire 77 due to excessive rotation of the antenna 7 is used. Cutting can be prevented.

  Moreover, it is possible to attach the antenna 7 which combined the characteristic part in 2nd-9th embodiment with respect to the alarm device of this embodiment. That is, in the antenna 7 provided with a combination of the characteristic parts in the second to ninth embodiments, the rotating shaft 720 having the protrusion 722 shown in FIG. In addition to the effects in the present embodiment, the effects in the second to ninth embodiments can be obtained.

<Twelfth Embodiment>
The alarm device of the 12th Embodiment in this invention is demonstrated with reference to drawings. FIG. 18 is an external view showing the configuration of the alarm device in the present embodiment. In the configuration of the alarm device shown in FIG. 18, portions used for the same purpose as the configuration of the alarm device shown in FIG. 1 are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 18, the alarm device of the present embodiment has a pull cord 8 linked to a button 9 for operating the alarm device, instead of the antenna 7 (see FIG. 1) in the alarm device of each of the embodiments described above. Is a configuration including an antenna 7a. The other configuration is the same as that of the alarm device having the configuration of FIG. 1 in each of the above-described embodiments, and thus detailed description thereof is omitted. As the button 9, for example, a test button for confirming the operation is installed. The pull cord 8 is attached to perform the same operation as that of the button 9 when an alarm is installed at a high place where the operator cannot reach and the operation of the button 9 is impossible.

  In the alarm device shown in FIG. 18, the drawstring 8 connected so as to interlock with the button 9 inside the housing 6 is led out of the housing 6 from the opening 64 provided in the side wall 61 of the housing 6. The And the lead-out | leading-out part of this drawstring 8 outside the housing | casing 6 is comprised so that it may integrate with the flexible electric wire 71b which comprises the linear antenna 7a. Further, the end portion of the portion of the flexible electric wire 71b introduced into the housing 6 is fixed to the circuit board 2 with the solder 78 in the same manner as in the first embodiment (see FIG. 2). . Thereby, the flexible electric wire 71b electrically connected to the circuit board 2 via the solder 78 is led out of the housing 6 together with the drawstring 8 as the linear antenna 7a.

  When configured in this way, the connection between the circuit board 2 and the flexible electric wire 71b is not limited to the solder 78, and a round crimp terminal 78a is connected as in the third embodiment, and this round crimp terminal 78a. The antenna 7 may be fastened together with the circuit board 2 and the housing 6 by a screw 78b penetrating the antenna. In addition, the drawstring 8 itself may be the flexible wire 71 b, but in the housing 6, the drawstring 8 installed so as to cooperate with the button 9 and the circuit board 2 can be connected. It is desirable to make the flexible wire 71b a separate body. Moreover, it is good also as a structure which wound the flexible electric wire 71b centering on the pulling cord 8 in the part which unites the pulling cord 8 and the flexible electric wire 71b.

  Thus, in this embodiment, the linear antenna 7a is formed by the flexible electric wire 71b integrated with the drawstring 8. As a result, the alarm device according to the present embodiment has the pull string 8 hanging down toward the floor regardless of the installation location. Therefore, as in the ninth embodiment, the linear antenna 7a integrated with the pull string 8 is provided. The longitudinal direction is automatically adjusted so as to be perpendicular to the floor surface. As a result, the linear antenna 7a of the alarm device in the present embodiment is automatically adjusted with the non-directional polarization plane formed in the direction perpendicular to the longitudinal direction of the antenna 7a in the most desirable direction of the room. The Moreover, by using the linear antenna 7a integrated with the drawstring 8, the antenna does not stand out on the structure of the alarm device.

  In the alarm device of the present embodiment, the linear antenna 7a is formed by a flexible wire. However, as in the alarm device of the first embodiment, the metal wire and the flexible wire are connected. It does not matter even if it is made the structure. At this time, in the linear antenna 7a, the flexible wire is used from the connection portion with the circuit board 2 inside the housing 6 to a part of the external lead-out portion led out to the outside of the housing 6. Further, the linear antenna 7a can be configured such that the longitudinal direction thereof is perpendicular to the floor surface.

  The present invention can be applied not only to an alarm device for smoke detection, but also to an alarm device having a heat sensing element such as a thermistor as long as the alarm device performs wireless communication. In addition to fire alarms such as smoke detection alarms, it is also applicable to gas detection alarms that issue gas alarms and human body detection alarms that detect human bodies. can do.

These are external appearance perspective views which show the structure of the alarm device in the 1st-11th embodiment of this invention. These are the schematic diagrams which show the structure of the alarm device in the 1st Embodiment of this invention. These are the schematic diagrams which show the structure of the alarm device in the 2nd Embodiment of this invention. These are the external appearance perspective views which show the structure of the antenna with which the alarm device in the 3rd Embodiment of this invention is provided. These are sectional drawings which show the structure of the antenna periphery in the alarm device provided with the antenna of FIG. These are sectional drawings which show the structure of the antenna periphery with which the alarm device in the 4th Embodiment of this invention is provided. These are figures which show the relationship with the circuit board of the antenna shown in FIG. 6, (a) shows the state before installation of an antenna, (b) shows the state after installation of an antenna. These are the schematic diagrams which show the structure of the alarm device in the 5th Embodiment of this invention. These are the schematic diagrams which show the structure of the alarm device in the 6th Embodiment of this invention. These are the exploded perspective views which show the structure of the antenna with which the alarm device in the 7th Embodiment of this invention is provided. (A) is a figure which shows another structure of the antenna with which the alarm device in the 7th Embodiment of this invention is provided, (b) is a perspective view when the said antenna after an assembly is cut | disconnected. . These are disassembled perspective views which show the structure of the antenna with which the alarm device in the 8th Embodiment of this invention is provided. FIG. 13 is a cross-sectional view showing a configuration of the antenna of FIG. 12. These are the schematic diagrams which show the structure of the alarm device in the 9th Embodiment of this invention. FIG. 15 is a schematic diagram showing a state when the alarm device of FIG. 14 is installed, in which (a) shows a state when installed on a ceiling surface, and (b) shows a state when installed on a wall surface. . (A) is the external appearance perspective view which shows the structure of the housing | casing of the alarm device in the 10th Embodiment of this invention, (b) is the angle fixing tool and antenna housing which were provided in the said housing | casing It is the schematic which shows these relationships. (A) is an external appearance perspective view which shows the structure of the housing | casing of the alarm device in the 11th Embodiment of this invention, (b) is the angle regulator provided in the said housing | casing, the antenna housing, It is the schematic which shows these relationships. These are the external views which show the structure of the alarm device in the 12th Embodiment of this invention. FIG. 3 is an exploded perspective view showing a configuration of an alarm device for smoke detection.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical base 2 Circuit board 3 Insect-proof cover 4 Plate speaker 5 Protective cover 6 Case 7, 7a Antenna 8 Drawstring 9 Button 11 Bottom plate 12 Perimeter wall 13 Labyrinth wall 14, 15 Housing part 21 Through hole 22 Through hole 31 Outer frame 32 Round hole 33 Insect net 51 Bottom 52 Peripheral wall 52a Opening 60 Base 61 Side wall 62 Main part 62a Screw hole 63, 64, 64a, 64b Opening 65 Angle fixing tool 66 Angle restricting tool 70 Antenna housing 71 Metal wire 71a, 71b Flexible wire 72, 72a External lead-out portion 73 Open end 74 Bending portion 74a Metal rod 74b Rotating shaft 75 End portion 76 Caulking fitting 77 Flexible wire 77a Redundant portion 77b Terminal 78 Solder 78a Round crimp terminal 78b Screw 78c Metal plate 78d Solder layer 79 Ring-shaped rubber 650 Bearing portion 651 Protrusion portion 66 Angle regulation unit 701 main portion 702 bent portion 703 end 704 the coil bobbin 705 groove 706 weight 720 rotates shaft 721 groove 722 protruding portions 781 crimp portion 782 pin 783 through hole L-emitting diode PD photodiode

Claims (17)

A circuit board on which a wireless communication circuit that communicates with an external communication device is mounted;
A housing containing the circuit board;
An antenna electrically connected to the wireless communication circuit on the circuit board and led out of the housing;
An alarm device comprising:
An alarm device, wherein the antenna has a movable external lead-out portion led out to the outside of the housing, and the directivity of the antenna can be switched by changing the direction of the external lead-out portion. In claim 1,
An alarm device, wherein a connection portion of the antenna with the circuit board is constituted by a flexible electric wire. In claim 1,
2. The alarm device according to claim 1, wherein the antenna has a redundant portion for relaxing torsional stress on a connection portion side with the circuit board. In any one of Claims 1 thru | or 3,
The alarm device, wherein the antenna is fastened together with at least one of the circuit board and the housing with a single screw. In claim 4,
An alarm device comprising: a solder layer sandwiched between a portion of the antenna where a tightening force by the screw is applied and the circuit board. In claim 1,
The circuit board includes a terminal that is sandwiched between the antennas and electrically connected to the antenna.
An alarm device characterized in that a connecting portion of the antenna can be rotated with respect to the terminal. In any one of Claims 1 thru | or 6,
An alarm device comprising the antenna made of a single metal wire having a spring property. In any one of Claims 1 thru | or 6,
While configuring the antenna with a flexible wire,
An alarm device comprising a bobbin that winds and holds the external lead-out portion of the antenna. In any one of Claims 1 thru | or 8,
An antenna housing covering the external lead-out portion of the antenna;
The alarm device, wherein the antenna housing and the external lead-out part are formed by simultaneous molding. In claim 9,
An alarm device, wherein the antenna housing is formed of a hot melt material. In any one of Claims 1 thru | or 8,
An alarm device comprising an antenna housing configured to cover the external lead-out portion of the antenna and composed of a plurality of members. In claim 11,
For the connecting portion of each member constituting the antenna housing, an insertion hole is provided in one of the connecting members, and the insertion member is removed from the insertion hole after being inserted into the insertion hole in the other of the connecting members. Providing nails that are impossible structure,
An alarm device characterized in that the antenna housing is assembled by connecting each of the members with a fitting structure in which the claws of the members are inserted into the insertion holes. In claim 11,
An alarm device characterized in that the antenna housing is assembled by connecting the connecting portions of the members constituting the antenna housing by ultrasonic welding. In any one of claims 9 to 13,
An alarm device characterized in that a weight for rotating the antenna housing by gravity is provided at a tip of the antenna housing. In any one of claims 9 to 13,
The housing has a holding hole for holding the antenna housing;
The antenna housing has a fitting portion that fits into the holding hole and is connected to the housing,
An alarm device comprising an angle fixing tool for fixing an angle for rotating the antenna housing to a plurality of specified angles at a connection portion formed by the holding hole and the fitting portion. In claim 1,
An operation button for instructing a predetermined action based on an external operation;
A drawstring that is led out of the housing and interlocks with the operation buttons;
With
An alarm device characterized in that the drawstring is used as an external lead-out portion of the antenna. In any one of Claims 1 thru | or 16,
An alarm device characterized in that rotation of the antenna toward the mounting surface by an external lead-out portion is restricted.

Images