JPH11284374A - Casing for housing control device mounted on vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the vibrations of a circuit board mounted in a casing and to prevent the casing cover from being shifted from a casing body, by fixing the circuit board to bosses mounted in the casing body and by supporting the peripheral end of the circuit board by a step made on the inner wall of the casing body. SOLUTION: A casing has a casing body and a casing cover, and the casing body has bosses 20 vertically mounted on the bottom thereof and for fixing a circuit board 21 with screws 22 and a step 23 made on the inner side wall thereof and for supporting the circuit board 21. When the circuit board 21 is fixed to the bosses 20 with the screws 22, the peripheral end of the circuit board 21 is placed on the step 23 and is supported from below. Therefore, even if the circuit board 21 is vibrated up and down such that a position fixed by the bosses is the node of the vibration, the downward vibration is prevented by the step 23. When the casing body 12 is covered with the casing cover 11, the casing cover 11 is placed on the casing body 12 and the bent members of the casing cover 11 are fitted in the recessed portions of the casing body 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing of a control device such as a vehicle emergency notification device mounted on a vehicle.
This is to improve the vibration resistance.

[0002]

2. Description of the Related Art In recent years, there has been a movement in Japan to standardize a vehicle emergency notification system in order to cope with frequent traffic accidents. In the event of a vehicle collision or accident, this system automatically reports vehicle emergency information to the center from an emergency notification device mounted on the vehicle, shortens the time it takes for the emergency vehicle to arrive at the accident site, Rescue more quickly,
This system has already been implemented in Germany.

An emergency notification device mounted on a vehicle, as shown in FIG. 8, measures the position of the vehicle based on an angle sensor 47 such as a gyro for detecting the traveling direction of the vehicle and GPS data received by a GPS antenna 65. A GPS receiver 48, a rollover sensor 49 for detecting the rollover of the vehicle, a RAM 50 for recording the position data of the vehicle while traveling, a flash ROM 51 for permanently storing data necessary for elucidating the cause of the accident, A CPU 46 for detecting the occurrence of an accident based on information from the speed sensor 54, the reverse 55, the crash sensor 56, the brake 57, etc. and the information from the rollover sensor 49 connected to the emergency notification device 41, and controlling the operation of the automatic notification; A modem 45 for modulating / demodulating data to be transmitted / received, a control switching unit 44 for controlling switching to data transmission or voice communication, and switching an input / output destination of data / voice for transmission / reception Data / voice switching unit 43
And a mobile phone 42 performing a communication operation through an antenna 64
And an internal battery 52 that supplies power when an external battery 53 used in normal times cannot be used in an emergency or the like, and further, a speaker that enables hands-free voice communication.
62 and a microphone 63, an emergency button 60 for enabling a manual emergency call, and an LED for displaying an operation state of the emergency call device 41
Connected to 59 etc.

On the other hand, a center 81 includes a telephone 82 for performing a communication operation, a modem 83 for modulating and demodulating data to be transmitted and received,
It has map data 85 stored in a database, a CPU 84 for judging an accident position and controlling each unit, an operation unit 87 operated by an operator, and a display unit 86 for displaying the accident position on the map. When an accident occurs, data is transmitted from the emergency notification device 41 to the center 81 via the wireless line 89 and the telephone line 88.

A vehicle-mounted device such as an emergency notification device is conventionally housed in a casing as shown in FIG. This housing is divided into a housing main body 12 for housing the device and a lid 11 of the main body 12, and the lid 11 has a rectangular bulging portion 13 for maintaining strength, and a screw 14 for inserting. Round hole 15 and long hole 16
In addition, a screw hole 17 for screwing the screw 14 is provided on the wall end surface of the housing body 12.

When closing the housing, the lid 11 is put on the housing main body 12, and first, each round hole 15 is aligned with each screw hole 17 and fixed with a screw 14. Next, the screws 14 are passed through the long holes 16 and the screw holes 17 so as to be aligned with each other, and are screwed. At this time, since the elongated hole 16 has a margin unlike the round hole 15, even if there is a slight displacement, screwing can be performed.

[0007]

It is necessary for the emergency notification device to continue to record the position of the vehicle accurately while the vehicle is traveling, and if an accident occurs, the traveling history is stored in the center. It is necessary to transmit without error. The emergency notification device is required to have sufficient vibration resistance so that these operations do not fail due to vibration of the vehicle.

However, it is difficult to sufficiently suppress the vibration of the circuit board mounted in the housing in the conventional housing of the on-vehicle control device, and the mounting state of the housing body and the lid is shifted due to the vibration. Problem arises.

The present invention solves such a conventional problem, and suppresses the vibration of a circuit board mounted in a housing and the occurrence of displacement between a housing body and a lid. An object of the present invention is to provide a housing for a control device.

[0010]

Therefore, in the housing of the present invention, the circuit board is fixed to a boss provided on the housing body, and the periphery of the circuit board is formed by a step provided on the inner wall of the housing body. Supporting.

When the lid is placed on the housing body, the bent piece of the lid and the cutout of the housing body are fitted and positioned.

Therefore, vibration of the circuit board is reduced, and
The displacement between the lid and the housing body due to vibration can be prevented.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is for fixing a circuit board to the bottom of a housing body for housing a circuit board in a housing of a vehicle-mounted control device mounted on a vehicle. The boss is provided on the inner wall of the housing body, and a step supporting the periphery of the circuit board is provided, and the vibration of the circuit board is limited by the step. Thus, the vibration of the circuit board can be reduced.

According to a second aspect of the present invention, at least one pair of opposing sides of the cover covering the housing body is provided with a bending piece bent toward the housing body, and the bent piece is provided on the outer wall of the housing body. When the cover and the housing body are screwed and fixed by providing a recess in which the piece fits, the bent piece is fitted into the recess so that the lid can be positioned on the housing body. The fixed state between the housing body and the lid can be prevented from being shifted by vibration.

According to a third aspect of the present invention, a swelling portion that protrudes in a trapezoidal shape is provided at a central portion excluding a peripheral portion of the lid, and a corner of the swelling portion is obliquely cut, and A screw insertion hole for fixing the lid to the housing body is provided.
The area of the bulging portion can be increased, and the strength of the lid can be increased.

According to a fourth aspect of the present invention, the height of the screw head screwed through the screw insertion hole is the same as the height of the bulging portion, and the protrusion of the screw head is an obstacle. do not become.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

This housing comprises a housing main body and a lid,
As shown in the cross-sectional view of FIG. 1 and the perspective view of FIG. 2, a boss 20 for fixing a circuit board 21 with screws 22 is provided upright on the bottom surface of the housing body. A step 23 for supporting the substrate 21 is provided. When the circuit board 21 is fixed on the boss 20 with the screws 22, the peripheral edge of the circuit board 21 is stepped.
The circuit board 21 rests on the portion 23 and is supported. Therefore, even when the circuit board 21 vibrates so as to bend up and down using the fixed boss position as a node of vibration, the downward vibration is suppressed by the step 23.

FIG. 3 is a graph showing the state of the vibration. FIG. 3B shows the vibration relationship between the housing and the circuit board when the circuit board 21 is simply fixed with the boss 20.
(A) shows the relationship of vibration between the housing and the circuit board when the peripheral edge of the circuit board 21 is supported by the step 23. When the peripheral edge of the circuit board 21 is supported by the step 23 (FIG. 3A), FIG.
The vibration is reduced by half compared to (b).

FIG. 4 shows the outer shape of the housing body 12 and the lid 11, and FIG. 5 shows a plan view and a side view of the lid 11. A bulge 30 on the surface of the lid 11 and screws at the four corners
A round hole 36 for inserting the hole 14 is provided, and bent pieces 32 and 31 are provided on both short sides and one long side. On the other hand, a concave portion 33 in which the bent piece 31 fits and a concave portion 34 in which the bent piece 32 fits are provided on the outer surface of the side wall of the housing body 12, and the wall end surface of the housing body 12 is A screw hole 17 for screwing the screw 14 is provided.

When closing the housing main body 12 with the lid 11,
The lid 11 is put on the housing main body 12, the bent piece 31 of the lid 11 is fitted into the concave portion 33 of the housing main body 12, and the bent piece 32 is fitted into the concave portion. As a result, the relative positional relationship between the lid 11 and the housing body 12 is determined, and the round hole 36 of the lid 11 matches the screw hole 17 of the housing body 12. Then, the screws 14 are screwed together to fix the lid 11 and the housing body 12.

When the lid 11 and the housing body 12 are connected,
In this way, since the positioning is performed by fitting the bent pieces 31 and 32 and the recesses 33 and 34, the round hole 36 of the lid 11 is
It can be positioned accurately on 17 Therefore, this round hole 36
Need not be elongated. Since the long holes are not used, when the lid 11 and the housing body 12 are fixed with the screws 14, the fixed state between the lid 11 and the housing body 12 due to vibration or the like is prevented from being shifted. it can. In addition, the bent pieces 31, 32 and the concave
The fact that the lids 33 and 34 are fitted also helps to prevent displacement of the fixed state between the lid 11 and the housing body 12.

As shown in FIG. 5, the bulge portion 30 of the lid 11 has four corners cut diagonally. By diagonally cutting the four corners of the bulging portion 30 in this manner, a circular hole 36 is formed in the surface of the lid 11.
, The area of the bulging portion 11 can be increased. Therefore, the bulging portion 11 extends from the periphery of the surface of the lid 11.
, And the strength of the peripheral portion of the lid 11 increases. In FIG. 5, the notches 35 are bent pieces 31 and 32.
This is provided to facilitate bending of the device.

FIG. 6 shows the relationship between the height of the bulging portion 30 and the height of the head of the screw 14 when the lid 11 is fixed to the housing main body 12. The height matches the height of the bulging portion 30. In this way, cut the corner of the bulging part 30,
The distance between the bulging portion 30 and the screw 14 is reduced, and
The height of the screw 14 and the height of the head of the screw 14,
The protrusion of the head of the screw 14 becomes inconspicuous, and it is possible to prevent the protrusion from being caught on something.

This housing can be used not only for storing the vehicle emergency notification device but also for storing other on-vehicle control devices.

[0026]

As is apparent from the above description, the housing of the present invention can reduce the vibration of the housed circuit board.

Further, it is possible to prevent the fixed state between the housing body and the lid from being shifted by vibration.

Further, the strength of the lid can be increased.

Further, the protrusion of the head of the screw for fixing the lid does not interfere.

[Brief description of the drawings]

FIG. 1 is a sectional view of a housing body according to an embodiment of the present invention;

FIG. 2 is a perspective view of the housing main body of the embodiment with a part cut away;

FIG. 3 is a diagram illustrating a vibration state of a housing and a circuit board;

FIG. 4 is a perspective view of a housing body and a lid according to the embodiment;

FIG. 5 is a plan view and a side view of a lid according to the embodiment;

FIG. 6 is a diagram showing the relationship between the height of the bulging portion and the height of the head of the screw when the lid of the embodiment is attached,

FIG. 7 is a diagram showing a conventional housing;

FIG. 8 is a diagram showing a configuration of a vehicle emergency notification system.

[Explanation of symbols]

 11 Lid 12 Casing body 13 Swelling part 14 Screw 15, 36 Round hole 16 Long hole 17 Screw hole 30 Swelling part 31, 32 Bend piece 33, 34 Recess 35 Notch 41 Emergency call device 42 Mobile phone 43 Data / Sound switching unit 44 Control switching unit 45 Modem 46 CPU 47 Angle sensor 48 GPS receiver 49 Rollover sensor 50 RAM 51 Flash ROM 52 Internal battery 53 External battery 54 Speed sensor 55 Reverse 56 Crash sensor 57 Brake 59 LED 60 Emergency button 61 Handset 62 Speaker 63 Microphone 64 Antenna 81 Center 82 Telephone 83 Modem 84 CPU 85 Map data 86 Display section 88 Telephone line 89 Wireless line

Continuation of front page (72) Inventor Mikiya Arai 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Matsushita Communication Industrial Co., Ltd.

Claims (4)

[Claims] 1. A housing of an in-vehicle control device mounted on a vehicle, wherein a boss for fixing the circuit board is provided at a bottom of a housing main body that accommodates a circuit board, and an inner wall of the housing main body is provided. A stepped portion for supporting the periphery of the circuit board, the vibration of the circuit board being limited by the stepped portion. 2. A bent piece which is bent toward the side of the housing body is provided on at least a pair of opposed sides of the lid body which covers the housing body, and the bent piece is fitted to an outer wall of the housing body. A recess is provided, and when the lid and the housing body are screwed together and fixed, the bent piece is fitted into the recess so that the lid can be positioned on the housing body. The housing for an in-vehicle control device according to claim 1, wherein: 3. A swelling portion that protrudes in a trapezoidal shape is provided at a central portion of the lid except for a peripheral portion, and a corner of the swelling portion is cut obliquely, and the lid is mounted on a corner of the lid. The housing for an in-vehicle control device according to claim 2, wherein a screw insertion hole for fixing to the main body is provided. 4. The storage of the in-vehicle control device according to claim 3, wherein a height of a screw head screwed through the screw insertion hole is made equal to a height of the bulging portion. Housing.