JP5097080B2 - Security system transmitter - Google Patents

Description

  The present invention relates to a transmitter of a security system that transmits and receives ID data.

2. Description of the Related Art Conventionally, as a transmitter of a security system, a transmitter in which a board on which an electronic component such as an antenna is mounted is accommodated in a housing is known (for example, see Patent Document 1). In such a transmitter, when an impact is applied to the housing, the impact may be transmitted to the electronic component via the substrate or the like, and the electronic component may break down.
Japanese Utility Model Publication No. 1-86331

  The present invention has been made in order to solve the above-described conventional problems, and when an impact is applied to a housing containing the electronic component, the impact transmitted to the electronic component is mitigated, thereby causing a failure of the electronic component. It is another object of the present invention to provide a transmitter of a security system that can prevent a reduction in impact mitigation effect even when the electronic component is displaced from a predetermined position.

In order to achieve the above object, the present invention transmits and receives ID data, and stores the ID data in advance and transmits the ID data in a transmitter of a security system that opens and closes an electric lock based on the ID data. An electronic component including an electronic circuit, a substrate on which the electronic component is mounted, a box housing the substrate, a housing having a lid covering the box, and when an impact is applied to the housing An impact absorbing material having elasticity for alleviating an impact transmitted to the electronic component, and the impact absorbing material includes a plurality of columnar portions protruding from the inner surface of the lid so as to surround the periphery of the electronic component. And formed integrally with the lid by two-color molding.

According to the present invention , when an impact is applied to the housing, the impact transmitted to the electronic component is alleviated by the impact absorbing material, so that failure of the electronic component due to the impact can be prevented. Moreover, when assembling the electronic component by fitting it into the shock absorber, even if the electronic component is displaced from the predetermined position, the shock absorber is elastic and therefore bends, so that the electronic component becomes a shock absorber. Therefore, the impact mitigating effect can be prevented from being lowered.

Further, as compared with the case where the shock absorbing material is a separate component, the work of attaching the shock absorbing material to the lid at the time of assembling becomes unnecessary, and therefore the assembling cost can be reduced.

In addition , the shock absorbing material is more flexible than the case of a wall shape in which the part is connected instead of the columnar part. Spread.

  Hereinafter, a security system and a transmitter thereof according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of the security system of this embodiment. The security system 1 includes a transmitter 2 called a tag that is possessed by a user and transmits ID data, a tag reader 3 that reads ID data transmitted from the transmitter 2, and a controller 41 that receives data determined by the tag reader 3. And an electric lock door 42 that is opened and closed by the controller 41. The tag reader 3 reads ID data and determines whether or not the data is authenticated, and is connected to the controller 41 via an interface RS485 or the like. The controller 41 is connected to the computer 43 via an intranet or a dedicated LAN. The electric lock door 42 is installed at the entrance door of a room where only authorized users can enter, and the tag reader 3 is installed near the entrance door. The tag reader 3 determines whether or not the ID data is authenticated data, and transmits the determination result to the controller 41. The controller 41 opens the electric lock door 42 when the determination result is OK, and holds the electric lock door 42 in the locked state when it is NG. The computer 43 manages the locking of the room where entry is restricted, and opens and closes the electric lock door 42 of the room as necessary.

  FIG. 2 shows each configuration of the transmitter 2 and the tag reader 3 in the security system 1 as described above. The transmitter 2 supplies power to the storage unit 21 that stores the ID data, the communication unit 22 that transmits the ID data to the tag reader 3, the control unit 23 that controls the operation of the storage unit 21 and the communication unit 22, and each unit. And a transmission button 25 that is operated by the user to transmit the ID data to the communication unit 22. The communication unit 22 includes an LF band transmission / reception unit 22a that performs LF communication and a low-power transmission ASIC 22b that transmits a low-power wireless signal. The tag reader 3 includes an LF band transmission / reception unit 31 that performs LF communication, a low-power reception unit 32 that receives a low-power radio signal, and a control unit 33 that controls them.

  Communication between the transmitter 2 and the tag reader 3 is performed in an LF communication band (for example, 134 kHz band) and a specific low power radio (for example, 426 MHz band). When the transmitter 2 enters within about 1.5 m from the tag reader 3, the transmitter 2 in the normal sleep state receives the LF activation signal from the LF band transmission / reception unit 31 of the tag reader 3 and activates it. . The control unit 23 of the activated transmitter 2 transmits the ID data stored in the storage unit 21 from the low power transmission ASIC 22b to the tag reader 3. The tag reader 3 receives the ID data by the low-power receiving unit 32, determines whether the ID data is authenticated data, and transmits the result to the controller 41. Thus, automatic authentication is performed and the electric lock door 42 is opened and closed simply by the user approaching the tag reader 3. When the user presses the transmission button 25, the control unit 23 transmits ID data from the low power transmission ASIC 22b, and manual authentication is performed. Even if the voltage of the battery 24 of the transmitter 2 is lowered, when the transmitter 2 is brought within 30 mm from the tag reader 3, the LF band transceiver 22a of the transmitter 2 and the LF band transceiver 31 of the tag reader 3 are LF. Proximity authentication (passive authentication) is performed by performing bidirectional communication to transmit / receive ID data.

  3A and 3B show the appearance of the transmitter 2. The transmitter 2 includes a housing 5 and a battery cover 6 that is detachably fixed to the housing 5, and these are formed of resin. The housing 5 has a substantially ship-shaped box-shaped case 51 (box body) and a cover 52 (lid) that covers the case 51, and the battery cover 6 is fixed so as to cover the cover 52. The casing 5 and the battery cover 6 have a substantially rectangular parallelepiped shape with a small thickness in a state where the battery cover 6 is fixed to the casing 5. The case 51 is provided with a pressing portion 51a that can be pressed by the user. The pressing portion 51a and the switch built in the case 51 constitute the transmission button 25 described above. The switch is operated by a pressing operation to the pressing unit 51a.

  Next, an exploded configuration of the transmitter 2 will be described with reference to FIGS. 4 and 5 show the transmitter 2 viewed from the battery cover 6 side. The case 51 houses an electronic component 26 including an electronic circuit composed of the storage unit 21, the communication unit 22, and the control unit 23 (see FIG. 2) and a substrate 27 on which the electronic component 26 is mounted. The electronic component 26 is disposed on the surface of the substrate 27 on the cover 52 side. The cover 52 is fixed to the case 51 by a fastener 7 such as a screw. The case 51 has a female screw 71 that receives the fixing tool 7 on its inner bottom surface, and the cover 52 has a through hole 72 through which the fixing tool 7 passes. The fixing tool 7 passes through the through hole 72 and is screwed into the female screw 71.

  A concave battery box 52a is formed on the battery cover 6 side of the cover 52, and the battery 24 is fitted into the battery box 52a in a replaceable manner. In addition, a rubber waterproof packing 53 is provided on the battery cover 6 side of the cover 52, and when the battery cover 6 is fixed to the cover 52, the waterproof packing 53 has water from the gap therebetween. To prevent intrusion. The waterproof packing 53 is integrally formed with the resin cover 52 by two-color molding.

  The battery cover 6 is locked to the cover 52 and fixed with screws 8. The cover 52 has an opening 52b for locking the battery cover 6, and the battery cover 6 has a locking piece 6a inserted into the opening 52b. The locking piece 6 a is formed so as to protrude from the end of the battery cover 6. The case 51 has a female screw 81 for receiving the screw 8 on its inner bottom surface, and the cover 52 and the battery cover 6 have through holes 82 and 83 through which the screw 8 is passed, respectively. The screw 8 passes through the through holes 83 and 82 and is screwed into the female screw 81. When the battery cover 6 is fixed to the housing 5, as shown in FIG. 5, the locking piece 6 a is inserted into the opening 52 b, the battery cover 6 is fixed to the cover 52 with screws 8, and the battery cover 6 The battery 24 and the fixing tool 7 are obscured.

  FIG. 6 shows the transmitter 2 as seen from the case 51 side. On the inner surface 52 c of the cover 52, there is provided an impact absorbing material 9 having elasticity for alleviating the impact transmitted to the electronic component 26 when an impact is applied to the housing 5. An inner surface 52 c of the cover 52 is a surface facing the electronic component 26. The shock absorber 9 is provided so as to surround the electronic component 26 and is integrally formed with the cover 52 by two-color molding.

  The shock absorbing material 9 includes a planar portion 91 that extends along the inner surface 52c of the cover 52, and a plurality of columnar portions that are integrally formed with the planar portion 91 and project from the inner surface 52c so as to surround the periphery of the electronic component 26. 92. The shock absorber 9 has a shape that encloses the electronic component 26 by the flat portion 91 and the columnar portion 92. The size and shape of the flat portion 91 correspond to that of the electronic component 26. The columnar portions 92 are arranged in accordance with the size and shape of the electronic component 26 and are provided apart from each other, and the columnar portions 92 have a substantially cylindrical shape. The number of the columnar portions 92 is not limited to the illustrated number.

  A waterproof packing 54 is provided on the periphery of the cover 52, and this waterproof packing 54 prevents water from entering inside through the gaps when the cover 52 is fixed to the case 51. The shock absorber 9, the waterproof packing 54, and the above-described waterproof packing 53 (see FIGS. 4 and 5) are formed of the same material rubber, and are integrally formed with the resin cover 52 by two-color molding. . On the case 51 side of the substrate 27, a switch 28 constituting the above-described transmission button 25 (see FIG. 2) is mounted. The switch 28 is disposed at a position corresponding to the pressing portion 51a.

  FIG. 7 shows the electronic component 26 and the shock absorber 9 in a state where the transmitter 2 is assembled. In the figure, the illustration of the substrate 27 and the like is omitted. The electronic component 26 is fitted into the shock absorber 9, and the flat portion 91 is sandwiched between the electronic component 26 and the cover 52 and is in contact with the electronic component 26. The columnar portion 92 is in contact with the outer periphery of the electronic component 26.

  In the present embodiment configured as described above, when an impact is applied to the housing 5, the impact transmitted to the electronic component 26 via the substrate 27 or the like is alleviated by the impact absorbing material 9, and thus is caused by the impact. A failure of the electronic component 26 can be prevented. The same effect can be obtained when vibration is applied to the housing 5. Moreover, when the electronic component 26 is fitted into the shock absorbing material 9 and assembled, even if the electronic component 26 is displaced from a predetermined position, the shock absorbing material 9 is elastic and therefore bends. The electronic component 26 can be fitted into the shock absorber 9, and therefore the impact mitigating effect can be prevented from being lowered.

  Further, since the shock absorber 9 is integrally formed with the cover 52 by two-color molding, it is not necessary to attach the shock absorber 9 to the cover 52 at the time of assembly as compared with the case where the shock absorber 9 is a separate component. Therefore, the assembly cost can be reduced. Moreover, the adhesive for sticking the shock absorbing material 9 to the cover 52 becomes unnecessary, and the manufacturing cost can be reduced. Since the waterproof packings 53 and 54 are also two-color molded, assembly costs and manufacturing costs can be further reduced.

  Further, the shock absorber 9 has a columnar portion 92 and is easy to bend as compared to the case where the columnar portion 92 is replaced by a continuous wall shape, so that the assembly can be performed even if the position of the electronic component 26 is shifted. Sometimes the range in which the electronic component 26 can be fitted into the shock absorber 9 is widened. Further, since the shock absorber 9 is shaped so as to enclose the electronic component 26 by the flat portion 91 and the columnar portion 92, it is possible to improve the impact mitigation effect, and thus further suppress the failure of the electronic component 26. be able to.

  Further, when a case where a separate impact absorbing material is affixed to the cover 52 and a case where the impact absorbing material 9 is two-color molded with the cover 52 as in the present embodiment, the two-color molding is more effective. The position of the absorbent material 9 can be adjusted to a predetermined position with high accuracy, and positional deviation can be suppressed. Therefore, it is possible to prevent the impact absorption effect on the electronic component 26 from being lowered due to the displacement. Further, at the time of manufacturing, it is possible to suppress the variation in the position of the shock absorbing material 9 for each transmitter 2, thereby suppressing the variation in the shock absorbing effect.

  In addition, this invention is not restricted to the structure of the said embodiment, A various deformation | transformation is possible in the range which does not change the meaning of invention. For example, the battery 24 may be fixed to the outer bottom surface of the case 51, and the battery cover 6 may be provided so as to cover the case 5 including the outer bottom surface. Further, the fixing tool 7 is not limited to a screw but may be a pin, for example. Further, the shock absorber 9 and the waterproof packings 53 and 54 are not limited to two-color molding, and may be integrally formed with the cover 52 by insert molding. In addition, a gap may be provided between each of the flat portion 91 and the columnar portion 92 and the electronic component 26. Moreover, the columnar part 92 is not limited to a columnar shape, and may be a prismatic columnar shape or other columnar shapes. Further, instead of the columnar portion 92, a weight-shaped portion may be provided. In this case, the electronic component 26 can be easily fitted into the shock absorbing material 9.

The block diagram of the security system which concerns on one Embodiment of this invention. The block diagram of the transmitter and tag reader of the said system. (A) is the perspective view which looked at the said transmitter from diagonally upward, (b) is the perspective view which looked at the transmitter from diagonally downward. The disassembled perspective view of the said transmitter. The perspective view when the cover of the said transmitter is removed. The disassembled perspective view of the transmitter seen from the direction different from the above. The perspective view which shows the internal state in the state which assembled the said transmitter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Security system 2 Transmitter 26 Electronic component 27 Board | substrate 5 Case 51 Case (box)
52 Cover (lid)
52c Inner surface 9 of the cover Shock absorbing material 92 Projection

Claims (1)

In a transmitter of a security system that transmits and receives ID data and opens and closes an electric lock based on the ID data.
An electronic component including an electronic circuit for storing the ID data in advance and transmitting the ID data;
A substrate on which the electronic component is mounted;
A box housing the substrate, and a housing having a lid covering the box;
An impact absorbing material having elasticity for alleviating the impact transmitted to the electronic component when an impact is applied to the housing; and
The shock absorbing material has a plurality of columnar portions protruding from the inner surface of the lid so as to surround the periphery of the electronic component, and is formed integrally with the lid by two-color molding . Transmitter.

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