JP5405002B2 - Portable transmitter - Google Patents

Description

  The present invention relates to a portable transmitter that is applied to an intelligent key or the like, and that is automatically authenticated by radio waves just by being carried, and that achieves a key-necessary operation without a key.

Conventionally, as a portable transmitter for remotely controlling a door lock or door unlock of an automobile, a wiring board is detachably provided by an elastic claw of an inner case, and a transmission circuit and a push button switch are mounted on the wiring board. (For example, refer to Patent Document 1).
JP 2002-70373 A

  However, in conventional portable transmitters, the transmission circuit is mounted on the wiring board so that the user can touch the transmission circuit when replacing the battery. There was a problem that it was possible easily.

  The present invention has been made paying attention to the above problems, and an object of the present invention is to provide a portable transmitter having a structure for preventing modification that prevents electronic components from being touched even when disassembled.

In order to achieve the above object, the present invention has an electronic circuit unit in which an electronic component and an antenna bobbin are mounted on a substrate, and is automatically authenticated by radio waves just by being carried around. In the portable transmitter to achieve
The electronic circuit unit has an electronic component arranged on one side of the board, and the electronic component is housed in an antenna bobbin. The electronic circuit unit is connected to a terminal when the antenna bobbin is separated from the board and is disassembled. It has a coil disconnection structure for preventing illegal modification in which an antenna coil is disconnected .

Therefore, in the portable transmitter according to the present invention, the electronic component mounted on the board is disposed on one side of the board and housed in the antenna bobbin.
Therefore, even if the electronic circuit unit is taken out from the inside after being disassembled, the electronic components guarded by the substrate and the antenna bobbin cannot be easily touched.
As a result, it is possible to provide a portable transmitter having a remodeling prevention measure structure in which electronic components cannot be touched even when disassembled.

  Hereinafter, the best mode for realizing the portable transmitter of the present invention will be described based on Example 1 shown in the drawings.

First, the configuration will be described.
FIG. 1 is an exploded perspective view showing the overall configuration of an intelligent key (an example of a portable transmitter) according to the first embodiment.

  As shown in FIG. 1, the intelligent key according to the first embodiment includes an upper case 1, an elastic body cover 2, an electronic circuit unit 3, a battery 4, a lower case 5, and a key 6.

  The intelligent key system using the intelligent key has a door lock / unlock function, an engine start / stop function, a door request switch function, a trunk request switch function, an engine immobilizer function, and the like.

  The door lock / unlock function refers to a function of unlocking and locking the door by operating the door lock button and the door unlock button. In other words, a door lock or unlock signal is transmitted from the intelligent key to the body control module via the remote control entry tuner by button operation, and the body control module receives the signal and compares it with the key ID registered in the vehicle. When the IDs match, this is done by outputting a signal for operating each door lock actuator.

  The engine start / stop function refers to a function that allows the engine to be started / stopped by simply pressing an engine switch without removing a key. That is, by carrying the intelligent key and pressing the engine switch, the electronic ID is collated by two-way communication. If the collation results match, the engine is started or stopped.

  The door request switch function refers to a function that allows the door to be locked / unlocked by simply pressing the request switch by carrying an intelligent key.

  The trunk request switch function refers to a function that allows the trunk to be opened simply by pressing the trunk request switch by carrying an intelligent key.

  The engine immobilizer function is a function for preventing engine start with an intelligent key not registered for ID by registering a key ID (for immobilizer) in the vehicle.

  The upper case 1 serves as a button operation side surface, and includes a case body 11, a door lock button hole 12, a door unlock button hole 13, a panic button hole 14, and a key attaching / detaching groove 15. .

  The elastic cover 2 covers one surface and the outer peripheral portion of the electronic circuit unit 3 on the upper case 1 side, and includes a substrate cover portion 21, a door lock button portion 22, a door unlock button portion 23, and a panic button. Part 24 and key attaching / detaching groove part 25. The panic button unit 24 is an emergency button for emergency calls, and when pressed, sounds, lights, and the like are activated.

  The electronic circuit unit 3 has a door lock switch 32, a door unlock switch 33, and a panic switch 34 on one surface of the substrate 31 on the upper case 1 side, and an antenna bobbin 35 on one surface of the substrate 31 on the lower case 5 side. .

  The lower case 5 serves as a key attaching / detaching surface, and includes a case main body 51 and a key attaching / detaching groove 52.

  The intelligent key of Example 1 covers one side of the electronic circuit unit 3 on the upper case 1 side with the elastic body cover 2, attaches the battery 4 to one side on the lower case 5 side, and wraps the whole in the upper case 1 and the lower case 5, The two cases 1 and 5 are assembled by being fitted so as not to be easily detached. Note that the key 6 is fixed in a locked state by being inserted into the lower case 5, and is extracted from the lower case 5 by an unlocking operation with respect to an operation button (not shown).

  2A and 2B show an electronic circuit unit in the intelligent key according to the first embodiment. FIG. 2A is a front view, FIG. 2B is a rear view, and FIG. 2C is a cross-sectional view taken along line A2-A2. FIG. 3 is a cross-sectional view taken along line B2-B2 of FIG. 2 (b) showing the coil disconnection structure of the electronic circuit unit in the intelligent key of the first embodiment.

  In the electronic circuit unit 3, an antenna bobbin 35 is set along the outer periphery of one surface of the substrate 31, as shown in FIG. As shown in FIG. 2A, a door lock switch 32, a door unlock switch 33, and a panic switch 34 are arranged on the surface of the substrate 31 opposite to the one surface on which the antenna bobbin 35 is set. As shown in FIG. 2 (c), the electronic component 36 is disposed on one side of the substrate 31, and the electronic component 36 is accommodated inside the antenna bobbin 35. As shown in FIG. 2 (b), the antenna bobbin 35 has a coil groove portion 35b around which the antenna coil 38 is wound, a battery housing portion 35c in the upper portion, and an electronic component cover portion 35d in the lower portion. Have.

  As shown in FIG. 2C, the electronic circuit unit 3 has a coil disconnection structure 39 in which the antenna coil 38 connected to the terminal 37 is disconnected when the antenna bobbin 35 is separated from the substrate 31 and disassembled. Have.

  As shown in FIG. 3, the coil disconnection structure 39 extends over the terminal through hole 31a provided in the substrate 31, the terminal through hole 35a provided in the coil end of the antenna bobbin 35, and both the through holes 31a and 35a. And a terminal 37 to be arranged. The terminal 37 is provided with a terminal head portion 37a (a retaining structure) at the substrate side end portion, and the antenna coil 38 is fixed to the antenna bobbin side end portion of the terminal 37 (coil fixing portion 37b). . The terminal head 37a serving as a terminal retaining structure has a diameter larger than the inner diameter of the terminal through hole 31a provided in the substrate 31 to achieve the retaining from the substrate 31. The terminal head 37a is fixed to the substrate 31 by soldering.

Next, the operation will be described.
4A and 4B show an electronic circuit unit in an intelligent key of a conventional example. FIG. 4A shows a front view, FIG. 4B shows a rear view, and FIG. 4C shows a cross-sectional view taken along the line A1-A1. FIG. 5 is a cross-sectional view taken along line B1-B1 of FIG. 4 (b) showing the coil terminal structure of the electronic circuit unit in the conventional intelligent key. FIG. 6 is a cross-sectional view showing a state in which a substrate and an antenna bobbin are disassembled in a conventional electronic circuit unit.

  In the conventional electronic circuit unit, as shown in FIG. 4 (b), an antenna bobbin is set in a region extending from the middle to the upper side of one side of the board, and as shown in FIG. 4 (a), the antenna bobbin of the board is set. Switches are arranged on the side opposite to the one side where the is set. Then, as shown in FIGS. 4A, 4B, and 4C, electronic components are arranged on the lower position of the antenna bobbin on the board and the lower position of the switches on the board, that is, on both sides of the board. .

  And the coil terminal structure of this electronic circuit unit is arrange | positioned ranging over the terminal through hole provided in the board | substrate, the terminal through hole provided in the coil edge part of the antenna bobbin, and both through holes, as shown in FIG. And a pin-shaped terminal having the same diameter. The antenna coil is fixed to the end of the terminal on the antenna bobbin side, and the end of the terminal on the substrate side is fixed to the substrate by soldering.

Therefore, the conventional intelligent key has the following problems.
(a) Since the electronic components are barely mounted on both sides of the board, the electronic components can be easily touched simply by opening the case for battery replacement.
(b) If the soldering of the terminal is melted and the antenna bobbin is disassembled from the substrate in order to attempt to replace the electronic component, disassembly can be performed without disconnecting the antenna coil as shown in FIG.
(c) Since the setting area of the antenna bobbin extends from the middle to the upper part of one side of the board, the lower area of the board where the electronic components are soldered has low rigidity, and soldering is performed when operating the button with a strong force. There is a risk that cracks will occur in the applied part.
(d) Since the electronic components are barely mounted on both sides of the board, the sealing performance of the electronic components is low and the electronic components are easily affected by static electricity.

  On the other hand, with the enforcement of the domestic radio wave law that will be revised soon, as a measure against illegal modification, “a structure that cannot be easily disassembled” will be obligatory. Easily possible.

  The inventor paid attention to the fact that the conventional structure is not an illegal modification countermeasure structure against the new revised method, and the electronic components that were previously mounted on both sides were laid out on one side and the antenna expanded compared to the conventional one. A configuration is adopted in which electronic components are stored in the bobbin. Thus, it is possible to provide an intelligent key having a structure for preventing remodeling that cannot touch electronic components even when disassembled.

FIG. 7 is a cross-sectional view illustrating a coil disconnection state when the substrate and the antenna bobbin are disassembled in the electronic circuit unit of the first embodiment.
Hereinafter, the functions of the intelligent key of Example 1 are as follows: “Anti-touch effect on electronic parts”, “Antenna function disappearance action when disassembling”, “Improving solder crack resistance when operating buttons”, “ This will be described in the section “Improvement of antistatic performance”.

[Prevention of touching electronic components]
Conventionally, the electronic components 36 mounted on both sides of the substrate 31 are laid out on one side of the substrate 31 and the electronic components 36 are accommodated in the antenna bobbin 35. Even if the electronic component 36 is opened, the electronic component 36 cannot be easily touched.
That is, even if the electronic circuit unit 3 is taken out from the inside after being disassembled, the electronic component 36 is guarded by being surrounded by the substrate 31 and the antenna bobbin 35 as shown in FIG. I'm not sure.

[Distortion of antenna function during disassembly]
As described above, since the electronic component 36 is guarded by being surrounded by the substrate 31 and the antenna bobbin 35, in order to replace the electronic component 36, it is necessary to separate the substrate 31 and the antenna bobbin 35 and disassemble them. There is.
However, when the soldering on the terminal head 37a side of the terminal 37 is melted and the antenna bobbin 35 is pulled away from the terminal 37 as shown in FIG. 7, the terminal 37 is kept fixed to the substrate 31 by the terminal head 37a. The terminal 37 comes out of the terminal through hole 35a, and at this time, the antenna coil 38 of the antenna bobbin 35 is pulled and disconnected.
As a result, if an attempt is made to attempt illegal modification, the antenna function is lost, resulting in an illegal modification countermeasure structure.

[Improvement in solder crack resistance during button operation]
Since the setting area of the antenna bobbin 35 is expanded to an area extending over the entire surface of the board 31, the rigidity of the board 31 to which the electronic component 36 is soldered is increased.
For this reason, even if a button operation is performed with a strong force, the bending deformation of the substrate 31 can be suppressed to a small level, and the solder crack resistance that prevents the occurrence of cracks in the soldered portion of the electronic component 36 can be improved. .

[Improvement of anti-static performance of electronic components]
By laying out the electronic component 36 on one side of the substrate 31 and storing the electronic component 36 in the antenna bobbin 35, the sealing performance of the electronic component 36 is increased.
For this reason, compared with the prior art example in which the electronic components are barely mounted on both sides of the substrate, the electronic components 36 are less affected by static electricity, and the electrostatic resistance can be improved.

Next, the effect will be described.
In the intelligent key of the first embodiment, the effects listed below can be obtained.

  (1) Intelligent key that has the electronic circuit unit 3 in which the electronic component 36 and the antenna bobbin 35 are mounted on the substrate 31, and is automatically authenticated by radio waves just by being carried around, and the key-necessary operation is achieved by keyless. In the electronic circuit unit 3, the electronic component 36 is disposed on one side of the substrate 31, and the electronic component 36 is housed in the antenna bobbin 35. An intelligent key with structure can be provided. In addition, the electronic component 36 is less affected by static electricity, and the antistatic performance can be improved.

  (2) Since the electronic circuit unit 3 has the coil disconnection structure 39 in which the antenna coil 38 connected to the terminal 37 is disconnected when the antenna bobbin 35 is separated from the substrate 31 and disassembled, the electronic circuit unit 3 tries to remodel. If the substrate 31 and the antenna bobbin 35 are separated and disassembled, the antenna function can be lost during disassembly.

  (3) The coil disconnection structure 39 includes a terminal through hole 31a provided in the substrate 31, a terminal through hole 35a provided in the coil end of the antenna bobbin 35, and a terminal disposed across the through holes 31a and 35a. 37, a retaining structure is provided at the board side end of the terminal 37, and the antenna coil 38 is fixed to the antenna bobbin side end of the terminal 37. Therefore, when the board 31 and the antenna bobbin 35 are pulled apart, By leaving the terminal 37 on the 31 side, the fixed portion of the antenna coil 38 to the terminal 37 can be disconnected.

  (4) Since the terminal 37 is prevented from coming off by the terminal head portion 37a having a diameter larger than the inner diameter of the terminal through hole 31a provided in the substrate 31, the antenna bobbin 35 can be separated with a simple structure. The terminal 37 can be left on the substrate 31 side.

  (5) Since the electronic circuit unit 3 has the antenna bobbin 35 set along the outer periphery of one side of the substrate 31 and the switches 32, 33, 34 are arranged on the opposite side of the one side of the substrate 31, the button with a strong force Even if the operation is performed, the flexural deformation of the substrate 31 can be suppressed to a small level, and the solder crack resistance that prevents the occurrence of cracks in the soldered portion of the electronic component 36 can be improved.

  (6) The electronic circuit unit 3 has a door lock button 22 and a door unlock button 23, and is a unit built in an intelligent key having a door lock / unlock function and an engine start / stop function. The output can be increased, and it is possible to reliably prevent modification of the intelligent key that can be authenticated by radio waves at a position farther from the vehicle position.

  The portable transmitter of the present invention has been described based on the first embodiment. However, the specific configuration is not limited to the first embodiment, and the invention according to each claim of the claims is not limited thereto. Design changes and additions are allowed without departing from the gist.

  In the first embodiment, an example in which the antenna function is lost by disassembling the electronic circuit unit with the function for preventing the electronic component from being touched is shown. An example of erasing the memory function and processing function of the electronic circuit as well as the function of preventing touching is possible. In short, the electronic circuit unit is not limited to the first embodiment as long as the electronic component is arranged on one side of the substrate and the electronic component is housed in the antenna bobbin.

  In the first embodiment, the application example to the intelligent key is shown, but the present invention can also be applied to a portable transmitter called a remote control key or a smart key. In short, if it is a portable transmitter that has an electronic circuit unit with electronic components and antenna bobbins mounted on a board, and that is automatically carried by radio waves just by carrying it, it can perform key-necessary operations without key Applicable.

1 is an exploded perspective view illustrating an overall configuration of an intelligent key (an example of a portable transmitter) according to a first embodiment. 1 is an electronic circuit unit in an intelligent key according to a first embodiment, where (a) shows a front view, (b) shows a rear view, and (c) shows a cross-sectional view taken along line A2-A2. It is sectional drawing by the B2-B2 line | wire of FIG.2 (b) which shows the coil disconnection structure of the electronic circuit unit in the intelligent key of Example 1. FIG. It is the electronic circuit unit in the intelligent key of a prior art example, (a) shows a front view, (b) shows a rear view, (c) shows sectional drawing by the A1-A1 line. It is sectional drawing by the B1-B1 line | wire of FIG.4 (b) which shows the coil terminal structure of the electronic circuit unit in the intelligent key of a prior art example. It is sectional drawing which shows the state which decomposed | disassembled the board | substrate and the antenna bobbin in the electronic circuit unit of a prior art example. It is sectional drawing which shows a coil disconnection state at the time of disassembling a board | substrate and an antenna bobbin in the electronic circuit unit of Example 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper case 2 Elastic body cover 3 Electronic circuit unit 31 Board | substrate 31a Terminal through hole 32 Door lock switch 33 Door unlock switch 34 Panic switch 35 Antenna bobbin 35a Terminal through hole 35b Coil groove part 35c Battery storage part 35d Electronic component cover part 36 Electronic Component 37 Terminal 37a Terminal head (Retaining structure)
38 Antenna coil 39 Coil disconnection structure 4 Battery 5 Lower case 6 Key

Claims (4)

In portable transmitters that have electronic circuit units with electronic components and antenna bobbins mounted on the board, and are automatically authenticated by radio waves just by carrying them, and keyless operation is achieved by keyless,
The electronic circuit unit arranges electronic components on one side of a substrate, and stores the electronic components in an antenna bobbin .
The electronic circuit unit has a coil disconnection structure for preventing illegal modification in which an antenna coil connected to a terminal is disconnected when the antenna bobbin is separated from the substrate and disassembled . The portable transmitter according to claim 1 , wherein
The coil disconnection structure has a terminal through hole provided in the substrate, a terminal through hole provided in the coil end portion of the antenna bobbin, and a terminal arranged across both through holes,
A portable transmitter comprising: a terminal-side end portion of the terminal provided with a retaining structure; and an antenna coil fixed to an end portion of the terminal on the antenna bobbin side. The portable transmitter according to claim 2 , wherein
The portable transmitter according to claim 1, wherein the terminal retaining structure is a terminal head having a diameter larger than an inner diameter of a terminal through hole provided in the substrate. The portable transmitter according to any one of claims 1 to 3 ,
The electronic circuit unit is a portable transmitter characterized in that an antenna bobbin is set along the outer periphery of one side of the board, and a switch is arranged on the opposite side of the one side of the board.

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