JP4696704B2 - Mounting structure of radio module - Google Patents

Description

  The present invention relates to a radio wave module mounting structure in which a radio wave module in which an antenna is housed in a casing is attached to a metal license plate.

As a structure in which a radio module for an electronic license plate is attached to the license plate, the applicant has applied for Japanese Patent Application No. 2004-259687 and Japanese Patent Application No. 2005-129688. Among these, Japanese Patent Application No. 2004-259687 relates to a mounting structure in which a radio wave module having a structure in which a battery cannot be replaced is attached to a license plate, and Japanese Patent Application No. 2005-129688 has a radio wave module having a structure in which a battery can be replaced. The present invention relates to a mounting structure that can be mounted on a license plate.

  By the way, when the radio module is attached to the license plate, the license plate is made of metal, so that the transmission and reception of radio waves are not affected by the license plate in order to ensure its antenna performance (communication performance). It is necessary to arrange an antenna, and generally it is necessary to arrange the antenna on the surface side of the license plate (the side opposite to the vehicle body).

  In this case, in the radio wave module having a structure in which the battery cannot be replaced, the antenna itself and the battery are integrally housed in the housing. Must be placed on the front side of the license plate. However, due to the large volume of the battery that is housed in the housing integrally with the antenna, the housing is larger from the surface side of the license plate in some vehicles in the configuration in which the housing itself is arranged on the surface side of the license plate. There is a problem that the housing protrudes and there is a risk of damaging the casing, and there is also a problem that the aesthetic appearance is impaired.

  Moreover, in the radio wave module having a structure in which the battery can be replaced, the battery is not housed in the housing integrally with the antenna, but in a structure in which the battery is attached to and detached from the connection connector drawn from the housing. However, in the above-mentioned Japanese Patent Application No. 2005-129688, since the battery is configured to be attached and detached on the surface side of the license plate, the housing and the battery greatly protrude from the surface side of the license plate, There is a problem that there is a risk of breakage, and there is also a problem that the aesthetic appearance is impaired.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to appropriately ensure the antenna performance and to suppress the volume of the casing and the battery protruding from the surface side of the license plate. Accordingly, it is an object of the present invention to provide a radio wave module mounting structure that can avoid the risk of damage to the casing and the battery and can also prevent the appearance from deteriorating.

According to the first aspect of the present invention, when a radio wave module in which an antenna and a battery are housed in a housing is attached to a metal license plate, the antenna is formed on the license plate on the back side of the license plate. The housing is arranged on the back side of the license plate so that the battery is arranged on the back side of the license plate, and the radio module is attached to the license plate.

  As a result, the surface of the license plate is placed by placing the antenna on the back side of the license plate and corresponding to the antenna hole formed in the license plate, that is, the location where the metal of the license plate has been removed. Although not on the side, the antenna can be placed in a place where the transmission and reception of radio waves are not affected by the license plate, and the antenna performance can be ensured appropriately. In addition, by placing a large-capacity battery housed in the housing on the back side of the license plate, the housing can be prevented from protruding from the front side of the license plate, and the housing can be damaged. Can be avoided, and it can also be avoided that the aesthetics are impaired.

The sealing member for sealing the license plate side on the back side of the license plate of the antenna and battery are secured to the housing. Thereby, an antenna and a battery can be appropriately protected from the moisture, dust, etc. from the license plate side on the back side of the license plate. Further, the lint substrate on which the antenna is arranged and the battery are arranged in parallel in a direction substantially horizontal to the surface direction of the license plate. As a result, the dimension in a direction substantially perpendicular to the surface direction of the license plate of the housing can be reduced, and the space between the license plate and the vehicle body is narrow (when not sufficiently secured). Even if it exists, a radio wave module can be appropriately attached to the back side of a license plate.

According to the invention described in claim 2 , a part of the sealing member is fitted into the antenna hole. As a result, since the sealing member is fixed to the housing, the housing can be prevented from swinging with respect to the license plate, and the housing is securely fixed to the license plate. be able to.

According to the invention described in claim 3 , the sealing member is fitted into the antenna hole so that a part of the sealing member is flush with the plate surface of the license plate. Thereby, it can avoid beforehand that a part of sealing member protrudes from the surface side of a license plate, and it can avoid generating a sense of incongruity beforehand.

According to the invention described in claim 4 , a part of the sealing member is configured in substantially the same color as the plate surface of the license plate. Thereby, a part of sealing member can be made inconspicuous from the plate surface of a license plate, and it can further avoid that discomfort is produced.

According to the invention described in claim 5 , the antenna and the sub-battery are housed in the casing, and the radio module capable of detaching the main battery different from the sub-battery is attached to the metal license plate, The battery functions as a backup for the main battery, and when the main battery is normally installed, the radio module operates using the power supplied from the main battery as the operating power, and the main battery is removed. If the radio module that is configured to operate using the power supplied from the sub-battery as the operating power is attached to a metal license plate, the antenna is on the front side of the license plate. main battery while being arranged in the sealing member to be disposed on the back side of the license plate Parts is inserted into the sealing member fitting hole portion formed in the number plate, connector detachable main battery is formed or the sealing member and integrally drawn from the sealing member, radio module Is attached to the license plate.

Thereby, by arranging the antenna on the surface side of the license plate, the antenna can be arranged at a location where transmission / reception of radio waves is not affected by the license plate, and the antenna performance can be appropriately ensured. In addition, a large-capacity main battery can be placed on the back side of the license plate, the volume of the casing protruding from the front side of the license plate can be suppressed, and the risk of damage to the casing can be avoided. It is possible to avoid damaging the aesthetics.

According to the sixth aspect of the present invention, the sealing member seals the antenna from the number plate side on the surface side of the license plate and is fixed to the housing. Thereby, an antenna can be appropriately protected from the water | moisture content, dust, etc. from the license plate side by the surface side of a license plate.

According to the invention described in claim 7 , the sealing member fitting hole is formed in a rectangular shape, and the fitting surface in which a part of the sealing member is fitted in the sealing member fitting hole is rectangular. It is configured. This
Since the sealing member is fixed to the casing, it is possible to prevent the casing from swinging (shaking) with respect to the license plate, and securely fix the casing to the license plate. be able to.

According to the invention described in claim 8 , an antenna and a sub-battery are housed in a housing, and a radio module capable of detaching a main battery different from the sub-battery is attached to a metal number plate, The battery functions as a backup for the main battery, and when the main battery is normally installed, the radio module operates using the power supplied from the main battery as the operating power, and the main battery is removed. If the radio module is configured to operate using the power supplied from the sub-battery as the operating power , the antenna is attached to the metal license plate. If it is placed at a location corresponding to the antenna hole formed in the license plate, Connector detachable main battery is disposed on the back side of the license plate, wave module is attached to the license plate.

As a result, the surface of the license plate is placed by placing the antenna on the back side of the license plate and corresponding to the antenna hole formed in the license plate, that is, the location where the metal of the license plate has been removed. Although not on the side, the antenna can be placed in a place where the transmission and reception of radio waves are not affected by the license plate, and the antenna performance can be ensured appropriately. Further, by placing a detachable connector main battery on the back side of the license plate, it is possible to place a larger main battery volume on the back side of the license plate, a housing which projects from the front side of the license plate In addition to being able to reduce the volume of the housing, it is possible to avoid the risk of breakage of the housing, and it is also possible to avoid damaging the aesthetics.

According to the invention described in claim 9, the protection mechanism is provided to protect the main battery in a manner that the main battery is attached to the connector. As a result, the main battery can be protected from moisture, dust, etc., and the main battery is not exposed to the outside, so that the main battery can be prevented from being spontaneously detached from the connection connector. In addition, it is possible to prevent a third party from intentionally removing the main battery from the connection connector.

According to the invention described in claim 10 , the main battery is configured such that the attachment / detachment direction of the main battery with respect to the connection connector is any one of the upward direction, the lateral direction, and the downward direction of the license plate. Thereby, the main battery can be attached and detached from any one of the upward direction, the lateral direction and the downward direction of the license plate.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 2A is a cross-sectional plan view of a radio module for an electronic license plate (hereinafter simply referred to as a radio module). In the radio wave module 1, the housing 2 includes a small diameter portion 3 having a small outer dimension and a large diameter large portion 4 in a direction substantially horizontal to the surface direction of the license plate (left and right direction in FIG. 2). Steps 5a and 5b are formed so as to have a recess 2a that is open at one side (upper side in FIG. 2). In the recess 2a, a printed board 6 and a rectangular battery 7 are provided. Etc. are housed. The printed circuit board 6 and the battery 7 are accommodated so as to overlap in a direction substantially perpendicular to the surface direction of the license plate when the radio wave module 1 is attached to the license plate.

  The printed circuit board 6 is provided with an antenna 8 made of a patch antenna formed of, for example, a conductor pattern on the front surface 6a side (lower side in FIG. 2) and controlled on the back surface 6b side (upper side in FIG. 2). A circuit element 9 constituting each functional block such as a communication unit, a communication unit, and a storage unit is mounted. In this case, the antenna 8 is disposed on the small diameter portion 3 side, and the battery 7 is disposed on the large diameter portion 4 side.

  The battery 7 has two terminals 10, 11, 12 drawn out, and the claws 10 a, 11 a, 12 a, 12 b formed on the terminals 10, 11, 12 are connected to the surface 6 a side of the printed circuit board 6. And is electrically connected to the printed circuit board 6. The sealing member 13 is fixed to the housing 2 so as to seal the opening portion of the recess 2 a of the housing 2. That is, the radio wave module 1 has a structure in which the battery 7 is sealed in the casing 2 by the sealing member 13 and the battery 7 cannot be replaced. In addition, a buffer member (cushion member) 14 is interposed between the sealing member 13 and the battery 7 to relieve pressure acting on the battery 7 from the sealing member 13. Further, the large-diameter portion 4 of the housing 2 is formed with a circular mounting bolt insertion hole 15 through which a mounting bolt for mounting the housing 2 together with the license plate to the vehicle body is inserted.

  On the other hand, for example, a metal license plate 21 made of iron is attached to the vehicle body along the left-right direction of the vehicle (left-right direction in FIG. 2) as shown in FIG. A circular mounting bolt insertion hole portion 22 through which a mounting bolt for insertion is inserted, and a rectangular radio wave module fitting hole portion 23 for mounting the radio wave module 1 (the housing 2 thereof) to the license plate 21 are formed. Has been. In this case, the opening area of the radio wave module fitting hole 23 is slightly larger than the cross-sectional area of the longitudinal side surface of the small diameter portion 3 of the housing 2.

  As shown in FIG. 3, the radio wave module 1 configured as described above has a license plate in which the small diameter portion 3 of the housing 2 is inserted into the radio wave module fitting hole 23 from the back surface 21 b side of the license plate 21. The casing 2 protrudes from the front surface 21a side of the housing 21 and the large diameter portion 4 of the housing 2 remains on the back surface 21b side of the number plate 21 so that the gap portions 5a and 5b are in contact with the back surface 21b of the number plate 21. 2 is fitted into the radio wave module fitting hole 23 and attached to the license plate 21. That is, in the aspect in which the radio wave module 1 is attached to the license plate 21, the antenna 8 is disposed on the front surface side of the license plate 21, and the battery 7 is disposed on the back surface side of the license plate 21. .

  The number plate 21 to which the radio wave module 1 is attached is inserted into the mounting bolt insertion hole portion 22 of the radio wave module 1 and the mounting bolt 31 is inserted into the mounting bolt insertion hole portion 15 of the radio wave module 1 to the vehicle body. Mounted. In this case, the mounting bolt 31 is inserted into the mounting bolt insertion hole portion 22 of the number plate 21 through a seal and is inserted into the mounting bolt insertion hole portion 15 of the radio wave module 1 and attached to the vehicle body. After the 1 and the license plate 21 are attached to the vehicle body, the upper part of the attachment bolt 31 may be sealed with a seal. The radio wave module 1 may be attached to a license plate attached to the front end portion of the vehicle, or may be attached to a license plate attached to the rear end portion of the vehicle.

  As described above, according to the first embodiment, when the radio wave module 1 is attached to the license plate 21, the antenna 8 is arranged on the surface 21 a side of the license plate 21. The antenna 8 can be disposed at a place where transmission and reception are not affected by the license plate 21, and the antenna performance (communication performance) can be appropriately ensured. Further, since the large-capacity battery 7 accommodated in the housing 2 is arranged on the back surface 21b side of the license plate 21, the volume of the housing 2 protruding from the front surface 21a side of the license plate 21 is reduced. The risk of damage to the housing 2 can be avoided in advance, and the appearance can be prevented from being impaired.

  In addition, since the radio wave module fitting hole 23 of the license plate 21 is formed in a rectangular shape, and the fitting surface in which the housing 2 is fitted in the radio wave module fitting hole 23 is rectangular, It is possible to prevent the housing 2 from swinging (shaking) with respect to the number plate 21, and the housing 2 can be reliably fixed to the number plate 21. Furthermore, since the radio wave module 1 is not removed unless the license plate 21 is removed from the vehicle body, it is possible to realize a strong attachment structure against illegal acts such as mischief or theft by a third party. .

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. The first embodiment described above is configured such that the printed circuit board 6 on which the antenna 8 is disposed and the battery 7 are accommodated so as to be in a direction substantially perpendicular to the surface direction of the number plate 21. However, in the second embodiment, the printed circuit board on which the antenna is disposed and the battery are accommodated side by side so as to be in a substantially horizontal direction with respect to the surface direction of the license plate. It is.

  FIG. 5A shows a longitudinal plan view of the radio wave module 41. In the radio wave module 41, the casing 42 is formed in a flat plate shape, and has a concave portion 42a opened on one side (right side in FIG. 5). The concave portion 42a has a printed circuit board 43 and a rectangular shape. A battery 44 and the like are accommodated. The printed circuit board 43 and the battery 44 are accommodated side by side so as to be in a substantially horizontal direction with respect to the surface direction of the license plate when the radio wave module 41 is attached to the license plate.

  The printed circuit board 43 is provided with an antenna 45 made of, for example, a patch antenna formed by a conductor pattern on the front surface 43a side (right side in FIG. 5), and on the back surface 43b side (left side in FIG. 5). A circuit element 46 equivalent to the circuit element 9 described in the first embodiment is mounted. The battery 44 is electrically connected to the back surface 43 b side of the printed circuit board 43 via a lead wire 47. The sealing member 48 is fixed to the housing 42 so as to seal the opening of the recess 42 a of the housing 42. That is, in the radio wave module 41, the battery 44 is sealed in the casing 42 by the sealing member 48, and the battery 44 cannot be replaced in the same manner as the radio wave module 1 described in the first embodiment. It has a structure.

  The sealing member 48 is configured with substantially the same color as the plate surface (front surface) of the license plate, and a fitting protrusion 49 (a part of the sealing member referred to in the present invention) on the surface side (right side in FIG. 5). Is formed. Further, buffer members 50 a and 50 b for relaxing the pressure acting on the printed circuit board 43 from the sealing member 48 are interposed between the printed circuit board 43 and the sealing member 48, and also below the battery 44. The buffer member 51 is interposed. Further, in the same manner as the case 2 described in the first embodiment, the case 42 has a circular mounting bolt into which a mounting bolt for attaching the case 42 to the vehicle body together with the number plate is inserted. An insertion hole 52 is formed.

On the other hand, as shown in FIG. 5B, the metal number plate 61 is inserted with mounting bolts for attaching the number plate 61 itself to the vehicle body along the left-right direction of the vehicle (the left-right direction in FIG. 5). And a circular antenna hole 63 for securing the antenna performance of the antenna 45 when the radio wave module 41 is attached to the license plate 61. . In this case, the opening area of the antenna hole 63 is slightly larger than the cross-sectional area of the longitudinal side surface of the fitting protrusion 49 formed in the sealing member 48.

  As shown in FIG. 6, the radio wave module 41 configured in this way has a fitting protrusion 49 formed on the sealing member 48 from the back surface 61 b side of the number plate 61 fitted into the antenna hole 63. By doing so, it is attached to the license plate 61. That is, in the aspect in which the radio wave module 41 is attached to the license plate 61, the antenna 45 is disposed at a location corresponding to the antenna hole 63 of the license plate 62, that is, a location where the metal of the license plate 61 is removed. become. In this case, the fitting protrusion 49 is fitted into the antenna hole 63 so that the upper surface thereof is flush with the plate surface of the number plate 61.

  The license plate 61 to which the radio wave module 41 is attached has the mounting bolt 71 inserted into the mounting bolt insertion hole 62 of the license plate 61 and the mounting bolt insertion hole 52 of the radio wave module 41 to the vehicle body. Mounted. Also in this case, the mounting bolt 71 is inserted through the sealing plate through the mounting bolt insertion hole 62 of the number plate 61 and is inserted into the mounting bolt insertion hole 52 of the radio wave module 41 and attached to the vehicle body. After the 41 and the number plate 61 are attached to the vehicle body, the upper part of the attachment bolt 71 may be sealed with a seal.

  As described above, according to the second embodiment, when the radio wave module 41 is attached to the license plate 61, the antenna 45 corresponds to the antenna hole 63 of the license plate 61, that is, the license plate 61. Since the antenna 45 is arranged at a place where the metal is removed, the antenna 45 can be arranged at a place where the transmission / reception of radio waves is not affected by the license plate 61, and the antenna performance can be ensured appropriately. . In addition, since the large-capacity battery 44 accommodated in the housing 42 is arranged on the back surface 61b side of the license plate 61, the housing 42 does not protrude from the front surface 61a side of the license plate 61. It is possible to avoid the risk of the casing 42 being damaged, and it is also possible to avoid deteriorating the aesthetics.

  Further, since the sealing member 48 for sealing the antenna 45 from the number plate 61 side on the back surface 61b side of the license plate 61 is provided, moisture and dust from the number plate 61 side on the back surface 61b side of the license plate 61 are provided. It can be protected appropriately from such. In addition, since the fitting protrusion 49 formed on the sealing member 48 is configured to be fitted into the antenna hole 63, the sealing member 48 is fixed to the housing 42, so that the housing It is possible to avoid the swinging of the 42 with respect to the number plate 61 and the housing 42 can be securely fixed to the number plate 61.

  Further, since the fitting protrusion 49 formed on the sealing member 48 is configured to be fitted into the antenna hole 63 so as to be flush with the plate surface of the number plate 61, the fitting protrusion 49 Can be prevented from projecting from the surface 63a side of the number plate 63, and the fitting projection 49 is configured in substantially the same color as the plate surface of the number plate 61. Can be made inconspicuous from the plate surface of the license plate 61, and it is possible to avoid a feeling of strangeness in advance.

  Since the printed circuit board 43 on which the antenna 45 is arranged and the battery 44 are accommodated side by side so as to be in a substantially horizontal direction with respect to the surface direction of the number plate 61, the number of the casing 42 is Even when the space between the number plate 61 and the vehicle body is narrow (when not sufficiently secured), the size in the direction substantially perpendicular to the surface direction of the plate 61 can be reduced. The module 41 can be appropriately attached to the license plate 61. Further, in this case, unlike the first embodiment described above, a hole having a shape that is not related to the shape of the housing may be formed as the hole formed in the license plate 61. The step of forming the hole can be easily performed.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. In the first and second embodiments described above, the battery cannot be replaced. On the other hand, in the third embodiment, the battery can be replaced.

  FIG. 8A shows a cross-sectional plan view of the radio wave module. In the radio wave module 81, the housing 82 has a recess 82a that is open at one side (upper side in FIG. 8), and the printed circuit board 83, the sub battery 84, and the like are accommodated in the recess 82a. The printed circuit board 83 and the sub battery 84 are accommodated so as to overlap in a direction substantially perpendicular to the surface direction of the license plate when the radio wave module 81 is attached to the license plate.

  The printed circuit board 83 is provided with an antenna 85 made of, for example, a patch antenna formed by a conductor pattern on the front surface 83a side (lower side in FIG. 8), and on the back surface 83b side (upper side in FIG. 8). The circuit element 86 equivalent to the circuit element 9 described in the first embodiment and the circuit element 46 described in the second embodiment is mounted.

  The sub battery 84 is electrically connected to the printed circuit board 83 via an arch-shaped terminal 87 and a linear terminal 88. The sealing member 89 is fixed to the housing 82 so as to seal the opening of the recess 82 a of the housing 82. The sealing member 89 has a grommet 91 into which the two lead wires 90a and 90b are inserted, fitted in the grommet fitting hole 92, and fitted on the surface side (the upper side in FIG. 8). A protrusion 93 (a part of the sealing member referred to in the present invention) is formed. The two lead wires 90a and 90b are both flexible, and one end portion thereof is connected to the connection connector 94 and the other end portion thereof is connected to the printed board 83 described above. When the main battery 95 is mounted, the power of the main battery 95 is supplied to the circuit element 86 mounted on the printed board 83 described above.

  On the other hand, as shown in FIG. 8B, the metal number plate 101 is inserted with mounting bolts for attaching the number plate 101 itself to the vehicle body along the left-right direction of the vehicle (left-right direction in FIG. 8). A rectangular sealing member into which the two lead wires 90a and 90b are inserted by fitting the circular mounting bolt insertion hole portion 102 to be fitted into the fitting projection 93 formed on the sealing member 89. A fitting hole 103 is formed. In this case, the opening area of the sealing member fitting hole 103 is formed to be slightly larger than the cross-sectional area of the longitudinal side surface of the fitting protrusion 93 formed in the sealing member 89.

  Further, in the third embodiment, as shown in FIG. 9, a main battery housing portion 104 for housing the main battery 95 is formed on the back surface 101b side of the number plate 101, and the main battery housing portion. An attachment / detachment opening 105 for attaching / detaching the main battery 95 is formed on the upper side of 104, and a slide that slides in the left / right direction (arrow A 1, A 2 direction) of the number plate 101 so as to open / close the attachment / detachment opening 105. A lid 106 (protection mechanism in the present invention) is provided. In this case, in the mode in which the slide lid 106 is moved to the retracted position (the mode shown in FIG. 9A), the connection connector 95a drawn from the main battery 95 and the housing are opened by opening the attachment / detachment port 105. The connection connector 94 drawn out from the terminal 82 can be attached / detached, while the attachment / detachment port 105 is closed in the embodiment in which the slide lid 106 is moved to the use position (the embodiment shown in FIG. 9B). As a result, the main battery 95 accommodated in the main battery accommodating portion 104 is protected from moisture, dust, and the like from above the license plate 101.

  Further, in the aspect in which the main battery 95 is accommodated in the main battery accommodating portion 104, the connection connector 95a drawn from the main battery 95 is attached to the connection connector 94 drawn from the housing 82, and Since the claw portion 95b formed in the main battery 95 is hooked on the locking portion 104a formed in the main battery housing portion 104, the main battery 95 does not swing in the main battery housing portion 104 ( It is not wobbling).

  In the above configuration, the sub battery 84 accommodated in the housing 82 functions as a backup battery for the main battery 95. Specifically, when the main battery 95 is normally mounted, the radio module 81 operates using the power supplied from the main battery 95 as the operating power, while the main battery 95 is used for battery replacement, for example. If the battery is temporarily removed or illegally removed by a third party's malicious intention, the power supplied from the sub-battery 84 is operated to retain the memory information or secure the communication function. It is configured to operate as electric power. Further, the sub battery 84 does not necessarily have to be mounted. That is, even if the main battery 95 is removed, it is not necessary to retain memory information or to secure a communication function (the user does not have to). If not required, the sub-battery 84 may be omitted.

  In the radio wave module 81 configured in this manner, the connection connector 94 is inserted into the sealing member fitting hole 103 from the front surface 101a side of the number plate 101 and pulled out to the back surface 101b side of the license plate 101, and sealed. The fitting projection 93 formed on the member 89 is fitted into the sealing member fitting hole 103 so as to be attached to the number plate 101. That is, in the aspect in which the radio wave module 81 is attached to the license plate 101, the antenna 85 is disposed on the front surface 101a side of the license plate 101, and the connection connector 94 is disposed on the rear surface 101b side of the license plate 101. The main battery 95 is attached and detached on the back surface 101b side of the license plate 101.

  The license plate 101 to which the radio wave module 81 is attached is attached to the vehicle body using attachment bolts in the same manner as described in the first and second embodiments.

  As described above, according to the third embodiment, the antenna 85 is housed in the housing 82 and the connection connector 94 to which the main battery 95 can be attached and detached is connected to the housing 82 via the lead wires 90a and 90b. Since the antenna 85 is arranged on the surface 101a side of the license plate 101 when the radio wave module 81 drawn out from the license plate 101 is attached to the license plate 101, transmission / reception of radio waves is not affected by the license plate 101. The antenna 85 can be arranged at the location, and the antenna performance can be appropriately ensured. In addition, since the connecting connector 94 is arranged on the back surface 101b side of the number plate 101 and the main battery 95 having a large volume is configured to be attached and detached on the back surface 101b side of the number plate 101, it protrudes from the front surface 101a side of the number plate 101. The volume of the housing 82 can be suppressed, the risk of the housing 82 being damaged can be avoided, and the appearance can be avoided.

  Further, since the lead wires 90a and 90b are inserted and the sealing member 89 for sealing the antenna 85 from the number plate 101 side on the surface 101a side of the license plate 101 is provided, the antenna 85 is provided on the surface 101a side of the license plate 101. Thus, it is possible to appropriately protect against moisture and dust from the number plate 101 side. Further, the sealing member fitting hole 103 is formed in a rectangular shape, and the fitting surface in which the fitting protrusion 93 formed in the sealing member 89 is fitted in the sealing member fitting hole 103 is rectangular. Since it is configured so as to have a shape, it is possible to prevent the casing 82 from swinging with respect to the license plate 101, and the casing 82 can be securely fixed to the license plate 101.

  In addition, since the slide cover 106 that protects the main battery 95 is provided in a mode in which the main battery 95 is attached to the connection connector 94, the main battery 95 can be protected from moisture, dust, and the like. Is not exposed to the outside, it is possible to prevent the main battery 95 from being spontaneously detached from the connection connector 94, and the third battery is intended to be attached to the connection connector 94 by a third party. Can be avoided in advance.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be modified or expanded as follows.
In the first and third embodiments, at least the antenna may be configured to be disposed on the front surface side of the license plate, and the circuit element or the like may be disposed on the back surface side of the license plate. . In the first embodiment and the third embodiment, the housing may be configured in substantially the same color as the plate surface of the license plate.
In the third embodiment, the attachment / detachment direction of the main battery with respect to the connection connector is not limited to the upward direction of the number plate, and the attachment / detachment direction of the main battery with respect to the connection connector may be the lateral direction or the downward direction of the number plate. .

  In the third embodiment, the sub-battery and the main battery are not limited to non-chargeable (single-use) primary batteries, and may be rechargeable secondary batteries. In that case, especially when the main battery is a secondary battery, after the main battery is normally mounted to the housing, the operating power supply source to each functional block is switched from the sub battery to the main battery. The power may be supplied from the main battery to the sub battery to charge the sub battery. In addition, since there is a degree of freedom in the storage location of the main battery, a configuration in which a plurality of main batteries are stored at the same time, or a configuration in which a large-capacity (large volume) main battery is stored. Also good. Moreover, the structure by which the protection mechanism which protects a main battery is abbreviate | omitted may be sufficient. Furthermore, the configuration is not limited to the configuration in which the connection connector to which the main battery can be attached / detached is drawn from the sealing member, and the connection connector to / from which the main battery can be attached / detached may be integrated with the sealing member. A structure in which the connector is fitted (embedded) in the sealing member fitting hole portion integrally with the sealing member may be employed.

  In the antenna hole portion formed in the number plate on the back side of the license plate, the structure in which the second embodiment and the third embodiment are combined, that is, the main battery can be replaced. The structure arrange | positioned in the corresponding location, ie, the location from which the metal of the number plate was removed may be sufficient.

The front view (a), the rear view (b), and the cross-sectional plan view (c) which show the 1st Embodiment of this invention and show the aspect with which the radio wave module was attached to the number plate. Transverse plan view of radio module (a) and front view of license plate (b) The figure which shows the aspect by which a radio wave module is attached to a license plate The front view (a) which shows the 2nd Embodiment of this invention, and shows the aspect with which the radio wave module was attached to the number plate, the rear view (b), and the vertical side view (c) Longitudinal side view of radio module (a) and front view of license plate (b) 3 equivalent figure The front view (a) which shows the 3rd Embodiment of this invention, and shows the aspect with which the radio wave module was attached to the number plate, and a cross-sectional top view (b) 2 equivalent diagram License plate vertical rear view showing how the main battery is attached and detached

Explanation of symbols

In the drawings, 1 is a radio module, 2 is a casing, 7 is a battery, 8 is an antenna, 21 is a license plate, 23 is a radio module fitting hole, 41 is a radio module, 42 is a casing, 43 is a printed circuit board, 44 is a battery, 45 is an antenna, 48 is a sealing member, 49 is a fitting protrusion (a part of the sealing member), 61 is a license plate, 63 is an antenna hole, 81 is a radio wave module, 82 is a housing, 85 is an antenna, 89 is a sealing member, 93 is a fitting protrusion (a part of the sealing member), 94 is a connection connector, 95 is a main battery (battery), 101 is a license plate, 103 is a sealing member fitting A hole 106 is a slide lid (protection mechanism).

Claims (10)

A radio wave module mounting structure in which a radio wave module in which an antenna and a battery are housed in a housing is attached to a metal license plate,
The housing is disposed at a position corresponding to an antenna hole formed in the license plate on the back surface side of the license plate and the battery is disposed on the back surface side of the license plate. Is arranged on the back side of the license plate, the radio module is attached to the license plate ,
A sealing member that seals the antenna and the battery from the number plate side on the back side of the number plate is fixed to the housing,
A radio wave module mounting structure , wherein a printed circuit board on which the antenna is disposed and the battery are arranged in parallel in a direction substantially horizontal to a surface direction of the license plate . In the mounting structure of the radio wave module according to claim 1,
A radio wave module mounting structure, wherein a part of the sealing member is fitted into the antenna hole . In the mounting structure of the radio wave module according to claim 2,
The radio wave module mounting structure, wherein a part of the sealing member is fitted into the antenna hole so that a part of the sealing member is flush with a plate surface of the license plate . In the mounting structure of the radio wave module according to claim 1 or 2 ,
A mounting structure for a radio wave module, wherein a part of the sealing member is configured in substantially the same color as the plate surface of the license plate . An antenna and a sub-battery are housed in a housing and a radio module capable of detaching a main battery different from the sub-battery is attached to a metal number plate, and the sub-battery functions as a backup for the main battery, When the main battery is normally installed, the radio module operates using power supplied from the main battery as operating power, and when the main battery is removed, the radio module is connected to the sub battery. A radio wave module mounting structure configured to operate using power supplied from a battery as operating power,
A sealing member fitting in which a part of the sealing member is formed on the number plate so that the antenna is arranged on the front side of the number plate and the main battery is arranged on the back side of the number plate A connection connector that is inserted into the hole and detachably attachable to the main battery is drawn out from the sealing member or integrally formed with the sealing member, and the radio wave module is attached to the number plate. The mounting structure of the radio module. In the mounting structure of the radio wave module according to claim 5,
The radio wave module mounting structure, wherein the sealing member seals the antenna from the number plate side on the surface side of the license plate and is fixed to the casing . In the radio wave module mounting structure according to claim 6 ,
The sealing member fitting hole portion is formed in a rectangular shape, characterized Rukoto mating surface portion is fitted to the sealing member fitting hole portion of the sealing member is configured in a rectangular shape The mounting structure of the radio module. An antenna and a sub-battery are housed in a housing and a radio module capable of detaching a main battery different from the sub-battery is attached to a metal number plate, and the sub-battery functions as a backup for the main battery, When the main battery is normally installed, the radio module operates using power supplied from the main battery as operating power, and when the main battery is removed, the radio module is connected to the sub battery. A radio wave module mounting structure configured to operate using power supplied from a battery as operating power,
The antenna is located on the back side of the license plate and is disposed at a location corresponding to the antenna hole formed in the license plate, and the connector for attaching and detaching the main battery is located on the back side of the license plate. The radio wave module mounting structure is characterized in that the radio wave module is attached to the license plate . In the radio wave module mounting structure according to any one of claims 5 to 8,
A radio wave module mounting structure , wherein a protection mechanism is provided for protecting the main battery in a mode in which the main battery is mounted on the connection connector . The radio wave module mounting structure according to any one of claims 5 to 9,
A radio wave module mounting structure, wherein the main battery is configured such that a direction in which the main battery is attached to and detached from the connector is one of an upward direction, a lateral direction, and a downward direction of the license plate .

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