JP2806111B2 - Electronic equipment with anti-theft device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device equipped with an anti-theft device suitable for a vehicle-mounted audio device.

[0002]

2. Description of the Related Art A vehicle-mounted acoustic device provided with an anti-theft device is conventionally known. This conventional in-vehicle acoustic device with an anti-theft device detects that the power supply has been disconnected, and when the acoustic device is connected to the power supply again, a code input is requested, and the input code is stored in advance. Only when the codes match, the sound device becomes operable.

[0003]

However, as in the above-mentioned conventional example, in an audio device for inputting a recitation code, the code must be registered in advance, which is troublesome. However, there is a problem that the acoustic device cannot be used.

An object of the present invention is to eliminate the above-mentioned conventional problems, and to provide an electronic device with an anti-theft device that does not require a code input, is easy to operate, and can indicate that the anti-theft mode is in operation by a light emitting means. Is provided.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an operation unit detachably mounted on an electronic device main body, and whether or not the operation unit is mounted on the electronic device main body. , A switch for controlling the power supply to the electronic device main body, and a light emitting unit.

[0006]

The present invention is configured as described above. If the switch unit is turned off in a state where the operation unit is detached from the electronic apparatus main body, for example, by flashing the light emitting unit, the current mode is the anti-theft mode. Can be displayed, and if the switch means is on, the light emitting means is turned on, for example, to display and illuminate the re-attached portion of the operation unit.

[0007]

1 to 4 show an embodiment of the present invention.
It will be explained together. The present embodiment is an example of a vehicle-mounted acoustic device in which a radio receiver and a cassette deck are integrated. 1 to 4, reference numeral 1 denotes a main body of an audio device, and a front plate 2 is fixed to a front portion of the main body 1. Reference numeral 3 denotes a cassette insertion opening formed in the front plate 2,
An opening / closing lid 4 is rotatably supported by the cassette insertion opening 3. Reference numerals 5, 6, and 7 denote operation buttons for controlling a cassette deck arranged near the cassette insertion slot 3, and reference numeral 8 denotes a knob for turning on / off a power switch and controlling volume.
Reference numeral 10 denotes an operation button for adjusting sound quality, and 11 denotes an operation unit detachably supported in a concave portion 12 formed in the front panel 2. The operation unit 11 stores a desired broadcasting station of a radio receiver. Preset buttons 13, 14 and 15 for calling and calling, up / down buttons 16 for channel selection,
A band switching button 17, a display section 18 for displaying a reception frequency and the like are provided. An eject button 19 is operated when the operation unit 11 is detached from the front panel 2. The preset buttons 13 to 15 are also used as operation buttons for controlling various operations of the cassette deck during the operation of the cassette deck.

FIG. 5 is an exploded view of the front plate 2. In FIG. 5, reference numeral 20 denotes a support piece screwed to the back surface of the front plate 2, and a hole 20 formed in the support piece 20.
The protrusion 19a of the eject button 19 is inserted into a. The eject button 19 is provided in the hole 2 formed in the front plate 2.
4 and project to the front. Reference numeral 21 denotes a spring for urging the eject button 19 forward. Reference numeral 22 denotes a locking piece slidably held by the support piece 20. The locking piece 22 has a long hole 2 through which the protruding piece 19a of the eject button 19 passes.
2a is formed. 22b is an inclined surface formed integrally with the locking piece 22. 23 is a spring for urging the locking piece 22 rightward. The tip of the locking piece 22 projects into the recess 12 through a hole 25 formed in the inner wall surface of the recess 12 of the front plate 2. Hole 24 formed in front plate 2
The eject button 19 protruding to the front through the
When the push button is pressed against the urging force, the inclined surface 22b of the locking piece 22 is pushed by the rear projection 19b of the eject button 19.
Therefore, the locking piece 22 moves leftward against the urging force of the spring 23, and the tip of the locking piece 22 retreats into the hole 25. Reference numeral 26 denotes a V-shaped leaf spring, and one piece of the leaf spring 26 is fixed to the bottom surface of the recess 12. Reference numeral 27 denotes a restricting piece for restricting the operation unit 11 from jumping out. The restricting piece 27 is inserted into a hole 28 formed in the front plate 2 from the rear side and fixed. Reference numeral 27a denotes a projection formed integrally with the regulating piece 27. The projection 27a can be engaged with a concave groove 29 formed on the lower surface of the operation unit 11. Reference numeral 30 denotes a plurality of contacts arranged on the bottom surface of the concave portion 12;
0 denotes a plurality of contacts 3 formed on the rear surface of the operation unit 11.
1 can be contacted. Reference numeral 4 denotes an opening / closing lid rotatably supported by the front panel 2, and the cassette insertion opening 3 is opened / closed by the opening / closing lid 4. Reference numeral 32 denotes a spring for urging the opening / closing lid 4, and the opening / closing lid 4 is urged by the spring 32 to
Is closed. Reference numeral 33 denotes a switch fixed to the support piece 22, and this switch 33 is a switch for detecting that the eject button 19 has been pressed. 34 is the front panel 2
Light emitting diode attached to the bottom surface of the concave portion 12 of FIG.

FIG. 6 shows the operation unit 11 in an exploded state. In FIG. 6, reference numeral 35 denotes an upper case, and 36 denotes a lower case. The operation unit 11 is configured by combining and screwing the upper case 35 and the lower case 36 together. 13, 14, and 15 are the preset buttons, and 16 is the up / down button. These buttons are rotatably held by the upper case 35. 37 is a window formed in the upper case 35, 38 is a transparent plate fixed to the outer periphery of the window 37 with double-sided tape 39, 17 is the band switching button, and 40 is a recess formed on the right side of the upper case 35. The concave groove 40 is engageable with a protruding piece 41 formed on the inner wall surface of the concave portion 12 of the front plate 2. Reference numerals 42 and 43 denote optical derivatives which are screwed to the back of the upper case 35. Reference numeral 44 denotes a printed board on which a plurality of switches 45 driven by the buttons 13 to 17 are mounted.
46 is an illumination lamp fixed to the printed circuit board 44, 4
Reference numeral 7 denotes a display device fixed to the printed circuit board 44. 4
Reference numeral 8 denotes a ground plate, 49 denotes an insulating sheet, and 50 denotes a ground plate connected to the ground plate 48. The ground plate 50 is fixed to the outer surface of the lower case 36. As described above, the switch 4 is provided in the case including the upper case 35 and the lower case 36.
5. The operation unit 11 is configured by storing the display device 47 and the like. When the operation unit 11 is housed in the recess 12 of the front panel 2, the contact 31 of the operation unit 11
And the contact 30 of the front panel 2 are in contact with each other, and the electric circuit in the operation unit 11 and the electric circuit in the main body 1 are connected via the contacts 30 and 31.

As shown in FIGS. 1 and 2, the normal operation unit 11 is housed in a recess 12 of the front plate 2. In this storage state, the concave groove 4 formed on the right side of the operation unit 11
Numeral 0 denotes a protruding piece 41 formed on the inner wall surface of the concave portion 12 of the front plate 2.
The operation unit 11 is held in the recess 12 of the front plate 2, and the operation unit 11 is held in the recess 12 formed in the left side surface of the operation unit 11. The protrusion 27a is fitted in the concave groove 29 formed on the lower surface of the eleventh surface. In this holding state, the operation unit 11
Are in contact with the plurality of contacts 30 arranged in the recess 12 of the front panel 2, and the main body side circuit and the switch 45 of the operation unit 11, the lighting lamp 46, the display device 4
7 is connected. Therefore, the radio receiver and the cassette deck are controlled by operating the preset buttons 13, 14, 15 and the up / down button 16 of the operation unit 11.

Here, when the user leaves the car,
As shown in FIG. 2, when the eject button 19 is pressed, the locking piece 22 is pressed by the eject button 19, and the locking piece 2 is pressed.
The distal end of 2 enters the hole 25, and the engagement between the locking piece 22 and the concave groove 51 of the operation unit 11 is released. Therefore, the operation unit 11 is pushed forward by the urging force of the leaf spring 26. Even if the locking between the locking piece 22 and the groove 51 of the operation unit 11 is released, the groove 40 on the right side surface of the operation unit 11
And the projection 41 in the recess 12 of the front plate 2 are in a locked state, and are urged by the plate spring 26 to operate the operation unit 11.
Rotates so that the left side projects forward (see FIG. 3).
The rotation range of the operation unit 11 is
Is determined by the engagement range between the concave groove 29 on the lower surface of the projection and the projection 27a.
As shown in FIG. 3, when the operation unit 11 is turned and held and pulled forward, the protrusion 27a
Is disengaged from the front plate 2, and the engagement between the concave groove 40 on the right side surface of the operation unit 11 and the projection 41 on the front plate 2 is released. When the operation unit 11 is separated from the front panel 2, the contact 31 of the operation unit 11 and the contact 30 of the front panel 2 are brought into a non-contact state.
This non-contact state is detected by a detection circuit in the main body, and power supply to the radio reception circuit and the cassette deck control circuit is stopped. The user removes the operation unit 11 from the front panel.
Get out of the car with. For this reason, only devices without an operation unit remain in the automobile, which prevents theft.

FIG. 8 is a block diagram of the above embodiment. In FIG. 8, 55 is a microcomputer provided in the main body 1, 56 is an oscillation circuit, 34 is the light emitting diode, 57 is a battery, and 58 is an engine key. switch,
An ACC detection circuit 59 detects whether or not an accessory switch in the engine key switch 58 is on.
Reference numeral 0 denotes a power supply line that constantly supplies the battery voltage to the microcomputer 55.
Has a voltage determination function of determining whether the voltage supplied through the power supply line 60 is equal to or higher than a predetermined value. 11
Is a key matrix circuit provided in the operation unit 11, and the key matrix circuit 61 is connected to the microcomputer 55 via the contact 31 on the operation unit 11 side and the contact 30 on the main body 1 side. It is possible.

FIG. 9 shows the key matrix circuit 61. In FIG. 9, S _{0 to} S ₃ are lines to which pulse signals sequentially output from the microcomputer 55 at a predetermined cycle are input, and I _{0 to} I ₃ are lines for feeding the pulse signals back to the microcomputer 55. wherein between the line S ₀ to S ₃ and the line I ₀ ~I ₃ switch 45
Is connected. 62 is a diode connected between the line S ₂ and the line I _3, the pulse signal line S ₂ output from the microcomputer 55, a diode 62, the microcomputer 55 via the line I ₃
Is determined whether or not the contact 31 of the operation unit 11 and the contact 30 of the main body 1 are in a conductive state.

FIG. 10 shows a control processing flow of the light emitting diode 34 by the microcomputer 55. In FIG. 10, step a is a step of determining whether the voltage supplied to the microcomputer 55 via the power supply line 60 is equal to or higher than a predetermined value, and in step a, a voltage equal to or higher than the predetermined value is supplied from the battery 57. If it is determined that the contact is present, the process proceeds to step b, and it is determined whether or not the contact 31 of the operation unit 11 is electrically connected to the contact 30 of the main body 1, that is, whether or not the operation unit 11 is mounted on the main body 1. . This determination is detected by whether the pulse signal supplied to the line S ₂ at a predetermined timing from the microcomputer 55 as shown in FIG. 9 a diode 62, back to the microcomputer 55 via the line I _3. If it is determined in step b that the contacts 30 and 31 are conductive, the light emitting diode 34 is turned off in step c. If it is determined in step b that the contacts 30 and 31 are not conductive, the next step is performed. Proceed to step d. Step d
Then, it is determined whether or not the accessory switch in the engine key switch 58 is on. If it is determined that the accessory switch is on, the light emitting diode 34 is turned on in step e. On the other hand, if it is determined in step d that the accessory switch is off, the light emitting diode 34 is turned on and off in step f. The cycle of this blinking is determined by the oscillation circuit 56.

As described above, in the above embodiment, when the operation unit 11 is detached from the main body 1 and the accessory switch is turned off, that is, when the user operates the operation unit 11
When the vehicle is removed and the engine key is removed from the automobile, the light emitting diode 34 blinks, indicating that the main body 1 is currently in the anti-theft mode. When the user returns to the car and operates the engine key to turn on the accessory switch, the light emitting diode 34 is switched from blinking to lighting, so that the place where the operation unit 11 is reset can be displayed or illuminated. In particular, the position at which the night operation unit 11 is remounted can be clearly displayed and illuminated.

As described above, according to the above embodiment, when the operation unit 11 is removed, the electronic device remaining in the vehicle cabin has no operation button, so that an anti-theft effect can be obtained. Further, according to the above embodiment, the light emitting diode 3
The blinking of 4 indicates that the vehicle is in the anti-theft mode, the anti-theft effect can be enhanced, and the light-emitting diode 34 is turned on to clarify the re-installation position of the operation unit 11.

In the above embodiment, the light emitting diode 34
Blinks to indicate the anti-theft mode display, and turns on (continuously turns on) the light emitting diode 34 to indicate the re-installation position or the re-attachment position of the operation unit. It is only necessary to make the lighting mode different, such as displaying the re-attachment position of the operation unit or lighting the re-attachment position.
In the above embodiment, the light emitting diode 34 is provided in the concave portion 12 of the main body 1, but may be provided outside the concave portion 12.

[0018]

According to the present invention, the display means, such as a light emitting diode, is blinked or lit to provide an anti-theft mode display and a re-installation position display or re-installation of the operation unit. This has the advantage that it can be used as spot lighting.

[Brief description of the drawings]

FIG. 1 is a front view of an electronic device with an anti-theft device according to an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of the embodiment.

FIG. 3 is a diagram illustrating the operation of the embodiment.

FIG. 4 is an explanatory diagram of the operation of the embodiment.

FIG. 5 is an exploded perspective view of the front plate of the embodiment.

FIG. 6 is an exploded perspective view of the operation unit of the embodiment.

FIG. 7 is a bottom view of the operation unit of the embodiment.

FIG. 8 is a block diagram of a main part of the embodiment.

FIG. 9 is an electric circuit diagram of the operation unit of the embodiment.

FIG. 10 is a diagram showing an operation flow of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 11 Operation unit 12 Recess 30 and 31 Contact 34 Light emitting diode 55 Microcomputer 56 Oscillation circuit 57 Battery 58 Engine key switch 61 Key matrix circuit

Continuation of front page (56) References JP-A-4-197785 (JP, A) JP-A-3-235882 (JP, A) JP-A-3-45443 (JP, A) JP-A-5-58225 (JP) JP-A-3-45441 (JP, A) JP-A-62-56462 (JP, U) JP-A-63-122149 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB G08B 15/00 B60R 11/02 G08B 21/00

Claims (4)

(57) [Claims] An operation unit detachably mounted on an electronic device main body, detection means for detecting whether the operation unit is mounted on the electronic device main body, and power supply to the electronic device main body. Switching means for controlling, and a light emitting means, wherein a light emission mode of the light emitting means is changed according to an on / off state of the switch means when the operation unit is detached from the electronic device main body. Electronic equipment with an anti-theft device. 2. The light emitting device according to claim 1, wherein the light emitting device is turned on and off in accordance with the on / off state of the switch device.
Electronic equipment with an anti-theft device as described. 3. The electronic device with an anti-theft device according to claim 1, wherein the operation unit is detachably mounted in a concave portion formed in the electronic device main body, and light emitting means is provided in the concave portion. 4. The electronic device with an anti-theft device according to claim 1, wherein the switch means is an accessory switch operated by an engine key of the automobile.