JPS6238036A - Thin plate type portable device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a thin plate type portable device suitable for, for example, a wireless lock/unlock control device for a vehicle.

(Prior Art and its Problems) Previously, in Japanese Patent Application Laid-Open No. 119874/1987, the present applicant proposed that a mobile A unique code is sent back using an induced electromagnetic field from the loop coil of a wireless transmitter/receiver (hereinafter simply referred to as a portable device), and after being received by the loop coil of an on-vehicle device, it is compared with a pre-stored unique code. proposed a locking/unlocking control device for locking and unlocking vehicle doors, etc.

Fig. 3 is a perspective view showing the relationship between the on-vehicle device and the portable device, Fig. 4 is a diagram showing the hardware configuration of the on-vehicle device, Fig. 5 is a diagram showing the hardware configuration of the portable device, and Fig. 6 is a diagram showing the hardware configuration of the on-vehicle device. 2 is a flowchart showing a system program executed on the mobile device and the portable device.

Briefly explaining the operation of this device, when the door handle switch 2 of the vehicle 1 is operated, an interrupt is generated to the microcomputer 30 of the on-vehicle unit 3, and if the key is removed from the vehicle's ignition switch, the microcomputer The transmission request signal output from the computer 30 is
A by the operation of the modulation circuit 31 degree carrier oscillation circuit 32
After being M-modulated, the vehicle side loop coil 33 receives the CW wave as a CW wave.
is sent to the mobile device 4 side using an induced electromagnetic field (
FIG. 5 Steps 100 and 101>.

Then, on the portable device 4 side, the request signal is detected via the loop coil 41° receiving and demodulating circuit 42, and the microcomputer 43 operates in response to this, and the unique code read from the unique code storage unit 44 is sent to the modulating circuit. 45. The signal is AM-modulated by the operation of the carrier initiation circuit 46 and sent back to the on-vehicle device using the induced electromagnetic field from the loop coil 41.

Next, on the in-vehicle device side, the loop coil 33. The reception demodulation circuit 34 receives the unique code and stores it in the unique code storage unit 3.
5, to identify whether the user is a registered user or not (step 102 in FIG. 5).
, 103, 104).

Here, when it is determined that the unique codes match, the door lock actuator 37 is driven via the actuator drive circuit 36 to unlock or lock the door (steps 105, 106, and 107 in FIG. 5). ).

This provides the convenience of vehicle users in that they can freely lock or unlock the doors without having to operate any special keys, simply by carrying the portable device 4 in, for example, a breast pocket or a bag. .

By the way, the structure of a portable device is such that even if you bend over while putting it in your pants' back pocket,
A reinforcing groove with flexibility was required to prevent damage to the circuit components inside the case.

(Objective of the Invention) An object of the present invention is to incorporate a board in a thin case and mount a plurality of circuit components thereon, such as in the thin portable device of the wireless lock/unlock control device described above. The purpose of this thin-plate portable device is to prevent circuit components from being damaged or cracks from being soldered when the case is bent by an external force.

(Structure of the Invention) In order to achieve the above object, the present invention is characterized in that each circuit component is mounted on a board so that its longitudinal direction is orthogonal to the longitudinal direction of the board. I'll go.

(Description of Embodiments) FIG. 1 is an exploded perspective view of a thin plate type portable device according to the present invention, and FIG.
The figure is a plan view of a flexible substrate used for this.

As shown in FIG. 1, the structure of the portable device 4 is as follows: First, a flexible circuit board on which various circuit components 4.02 are mounted is mounted on the bottom of a rectangular thin plate-shaped or card-shaped case body 401 made of shallow synthetic resin. 403 is laid and fixed, and then the case body 4 is placed on top of it.
A loop coil 405 that is wound into a rectangular shape along the inner circumference of the outer circumferential wall 404 of 01 is fixed with adhesive tape or the like over its entire circumference, and then the case body 401a is attached to the upper part of the figure using a rectangular lid plate. I try to keep it tightly closed.

As shown in FIG. 2, the flexible circuit board 403 is shaped into a rectangle, and a CPU package 406 is mounted on the flexible circuit board 403. Crystal oscillator 407. Resistance 408. Control IC package 4
09. Transistor 410° button type mercury battery 41
] and a diode 412, respectively.

The diode 412 is connected to the longitudinal center portion 41 of the substrate 403.
3. That is, it is provided at a portion where the greatest bending stress is applied, and its longitudinal direction is orthogonal to the longitudinal direction of the substrate 4O3.

CPU package 406. Large components such as the button-shaped mercury battery 411 are disposed at both ends of the substrate 403 in the longitudinal direction, particularly at a part of the corner.

This is because this part is the part of the board that is the least bendable.

The control IC package 409 is composed of a so-called DIP package, and these packages also have a substrate 40.
The substrate 403 is disposed at both ends of the substrate 403 in the longitudinal direction, and its longitudinal direction is perpendicular to the longitudinal direction of the substrate 403.

Other crystal oscillators 407. Resistance 408. Small components such as the transistor 410, which are not long and thin, are appropriately placed in the gaps between the components described above.

According to the above configuration, even if the portable device is bent at the waist with the mobile device in the back pocket of pants, and the flexible circuit board 403 inside the case body is bent, the central portion 413 has the greatest bending stress. Since the linear components such as the diode 412 are only arranged with their longitudinal direction perpendicular to the longitudinal direction of the board 403, soldering these linear components may cause cracks to occur in places. There is almost no risk of damage.

Furthermore, regarding both ends of the substrate 403 in the longitudinal direction, the DIP packages of the control IC 409 are arranged so that their longitudinal directions are orthogonal to the longitudinal direction of the substrate 403, so bending stress applied to these packages is also reduced. The value is sufficiently small, and there is almost no risk of cracks or damage occurring during soldering.

In addition, the CPU package 406. Button type mercury battery 41
Since the large components such as No. 1 are located at some of the corners of both longitudinal ends of the board with relatively little surface bulge, there is almost no possibility that large bending stress will be applied to these components.

Therefore, even if the circuit board inside the case body is warped in the longitudinal direction, the risk of damage to the internal circuit components or cracks occurring at soldered spots is reduced as much as possible.

Incidentally, in the above embodiments, the present invention was applied to a portable device of a locking/unlocking control device for a vehicle, but it goes without saying that it can also be widely applied to other card calculators and the like.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing the structure of the thin-plate portable device according to the present invention, Fig. 2 is a front view showing the flexible circuit board inside the portable device, and Fig. 3 is the relationship between the in-vehicle device and the portable device. 4 is a block diagram showing the electrical configuration of the on-vehicle device, FIG. 5 is a block diagram showing the electrical configuration of the portable device, and FIG. 6 is a control program for the on-vehicle device and the portable device. 2 is a flowchart showing the configuration of FIG. 4...Portable device 401...Case body 403...Flexible circuit board 406...CPU package 407...Crystal oscillator 408...Resistor 409...Control IC package for IC package 4th factor l 5th factor 4 Figure 6

Claims (1)

[Claims] (1) In a thin portable device in which a plurality of circuit components are arranged on a board built into a thin case; the longitudinal direction of each of the circuit components is orthogonal to the longitudinal direction of the board. What is claimed is: 1. A thin plate type portable device, characterized in that the device is disposed on a board.