JP2000208961A - Electronic component assembly body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance sealing property so as to prevent a filler filled in a case from leaking to the outside through a connector. SOLUTION: A connector 14 connected to a circuit board 13 is mounted on a case 12 containing the circuit board 13, whereon an electronic component is mounted with male and female fit liquid tightly, and a resin material 15 is filled in the case 12 wherein the circuit board 13 is contained and the connector 14 is mounted. Therefore, a clearance between the case 12 and the connector 14 can be sealed airtightly just by mounting the connector 14 with male and female fit liquid tightly to the case 12, and the resin material 15 can be surely prevented from leaking to the outside without the use of a sealing means such as an O-ring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component assembly having an improved sealing property so that a filler filled in a case does not leak outside through a connector.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view showing an example of a conventional electronic component assembly. The electronic component assembly 1 shown at the same time
A circuit board 3 on which electronic components (not shown) are mounted in a box-shaped case 2 is provided with a connector 4 for connecting a wire harness 4a. In this case, the resin material 5 is filled in the case so that the short circuit does not occur, the circuit board 3 is covered with the resin material, and the connection between the case 2 and the connector 4 is fixed. A notch 2a is formed in the rear wall of the case 2 as a connector receiving portion for mounting the connector 4, and a rubber O-ring 6 for sealing a boundary surface between the case 2 and the connector 4 is engaged. An engaging groove 2b to be combined is formed in the center of the inner wall of the notch 3a. The wire harness 4a to which the connector 4 is connected is a bundle of wires for connecting electronic components mounted on the circuit board 3 in the case 2 to an external battery power source or a sensor. The connector 4 is directly connected to the connector 4 or is connected to the connector 4 via a socket or the like which fits into the connector 4.

When assembling the electronic component assembly 1,
First, the O-ring 6 is fitted around the body of the connector 4 and
After the ring 6 is positioned so as to be engaged with the engagement groove 2b, the connector 4 is fitted into the notch 2a. However, the circuit board 3 on which the electronic components are mounted and the connector 4 are already connected, so that the fitting of the connector 4 and the accommodation of the circuit board 3 in the case 2 are performed simultaneously. When the connector 4 has been mounted in the notch 2a in a predetermined state, the case 2 is filled with the molten resin material 5, and the electronic components in the case 2 are air-tightly and liquid-tightly sealed. The resin material 5, which is an insulating filler, is poured into the case 2 while being melted at a high temperature, and is cooled and solidified as time passes. Therefore, the circuit board 3 including the electronic components is covered with the solidified resin material 5, and at the same time, the connector 4 is also fixed to the case 2.

[0004]

In the above-mentioned conventional electronic component assembly 1, before filling the resin material 5, a rubber O-ring 6 as a sealing material is used with a tool or directly by hand. 4 and the O-ring 6 must be slid to a predetermined position, and adjusted so that the position coincides with the engaging groove 2b provided in the case 2. However, even if the connector 4 is appropriately fitted into the notch 2a of the case 2, the width of the engaging groove 2b of the case 2 used may vary, or the O-ring 6 may be attached to the connector 4 in a posture. When the connector 4 is slightly displaced, a part of the O-ring 6 may be turned up when the connector 4 is mounted on the case 2. In such a case, a sealing failure in which the sealing function required for the O-ring 6 is not sufficiently exhibited is caused, and resin leakage easily occurs from a boundary surface between the connector 4 and the case 2, and further, a boundary between the case 2 and the connector 4. The surface is
Since the O-ring 6 is sealed by only one O-ring 6, there is a problem that the O-ring 6 lacks a safety margin against damage or failure. Further, since there is a certain limit in the locking ability of the single O-ring 6 and the resin material 5, there is a danger that the connector 4 will fall out of the case 2 when a strong shock or vibration is applied from outside during use. There was a problem that sex could not be denied.

[0005] In addition, the connector 4 in which the O-ring 6 is inserted.
Instead of assembling into the case 2, the O-ring 6 is previously assembled on the case 2 side as in the electronic component assembly 1 shown in FIG.
There is also an assembling method in which the connector 4 and the circuit board 3 are mounted on the case 2 so that the connector 4 is inserted into the O-ring 6. Connector 4 after fitting into
However, there is a problem that the workability is very poor because the positioning of the device is troublesome.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to enhance the sealing property so that a filler filled in a case does not leak outside through a connector.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a case for housing a circuit board on which electronic components are mounted, and a liquid-tight connector connected to the circuit board for receiving a connector of the case. The connector is characterized by comprising a connector which is mounted in the case by male and female engagement, and an insulating filling material which accommodates the circuit board and fills the case with the connector mounted.

[0008] The connector is characterized in that it comprises a plurality of rows of claws which elastically engage with a connector receiving portion of the case and prevent leakage of the insulating filler.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view showing an embodiment of the electronic component assembly of the present invention, and FIG. 2 is an enlarged view of a main part of the electronic component assembly shown in FIG.

In an electronic component assembly 11 shown in FIG. 1, a circuit board 13 on which electronic components (not shown) are mounted and a connector 14 for connecting a wire harness are mounted on a box-shaped case 12 having an open upper surface. In this case, a resin material 15 as an insulating filler is poured into the case 12 to fix the mounting state.
The case 12 has a rear wall portion serving as a connector receiving portion for mounting the connector 14. The connector receiving portion has three combs 2 extending inward in a comb shape close to an E shape.
1, 22, 23 are formed so as to be spaced apart and opposed to each other. In the case of the present embodiment, between the barriers 21.22 and 22,23
The space between them is an engagement space for engaging an engagement wall 41 of the connector 14 described later.

The connector 14 has a plurality of connection pin terminals 14.
A pair of left and right engaging walls 41 are integrally formed on both side surfaces of a rectangular parallelepiped case body 40 having a bottom surface protruding from the lower surface. The engaging wall 41 is divided into a pair of legs 43 by a slit 42 having a narrowest portion slightly narrower than the thickness of the barrier 22, and each leg opposing each other with a certain elastic restoring force in the expanding direction. The portions 43 are inserted into the spaces between the barriers 21.22 and 22 and 23 of the case 12, respectively.
As shown in FIG. 2, claws 43 a each having a corrugated cross-sectional shape are provided in two rows on the inner wall of the leg portion 43,
The tip of each claw 43a sandwiches the central barrier 22 from front and rear,
It functions to prevent the resin material 15 filled in the case 12 from leaking outside.

When assembling the electronic component assembly 11, the connector 14 is mounted on the circuit board 13 on which the electronic components are mounted.
Is soldered to connect the connector 14 to the circuit board 13. Next, the assembled circuit board 13 and connector 14 are mounted on the case 12. That is, the circuit board 13 is accommodated in a predetermined position in the case 12,
The connector 14 is pushed into the connector receiving portion from above. At this time, the pair of legs 43 of the engaging wall 41 extending to the left and right of the connector main body 40 are located between the barriers 21.22 and 22,23, respectively.
The insertion of the connector 14 is completed by inserting the connector 14 into the space therebetween and pushing the connector 14 to the insertion limit. When the mounting is completed, the claws 43a protruding in two rows from the inner walls of the pair of left and right legs 43 of the engaging wall 41 elastically sandwich the barrier 22 from the front and rear, respectively.

The distance between the front ends of the claws 43a opposed to each other is slightly smaller than the width of the barrier 22 in the thickness direction.
It is inserted into the space between 2 and between 22 and 23. As a result, the elastic restoring force generated in accordance with the expansion of the leg 43
3a sandwiches the barrier 22 from the front and rear, and the gap generated between the connector 14 and the case 12 is
0 is sufficiently sealed and divided by four claws 43a on both sides of the zero.

After the connector 14 has been mounted, the resin material 15 which has been melted at a high temperature is placed in the case 12.
And waits for the resin material 15 to cool and solidify. The resin material 15 filled in the case 12 penetrates into a slight gap between the barriers 21, 22, 23 of the case 12 and the leg 43 of the connector 14.
The resin material 1
It is unlikely that the member 5 gets over the claw 43a and leaks to the outside. In addition, since there are four locking portions of the claws 43a on the left and right sides, even if the first row of the two rows of the claws 43a is damaged, the second row of the claws 43a reliably leaks the resin material 15. It can be said that the safety structure for preventing leakage of the resin material 15 is provided in multiple layers.

As described above, the electronic component assembly 11 includes:
Case 12 for housing circuit board 13 on which electronic components are mounted
Then, the connector 14 connected to the circuit board 13 is mounted in a liquid-tight manner by male and female engagement, and the resin material 15 is filled in the case 12 in which the circuit board 13 is accommodated and the connector 14 is mounted. The gap between the case 12 and the connector 14 can be firmly sealed only by attaching the connector 14 to the case 12 in a liquid-tight manner, so that the sealing means such as the O-ring 6 is used. Without this, external leakage of the resin material 15 can be reliably prevented. In addition, since the assembling work by the male and female engagement is simple, the workability is extremely excellent. In addition, since the connector 14 is male and female engaged with the case 12 in the assembled state, an external impact or vibration is generated during use. Even if it is added, there is no change in the assembling posture, and it can be used stably for a long time.

Further, since the connector 14 is provided with two rows of claws 43a which are elastically engaged with the connector receiving portion of the case 12 and prevent the resin material 15 from leaking, the connector receiving portion of the case 12 has an elasticity. The two rows of claws 43a that are locked
When the resin material 15 is filled in the case 12, the external leakage of the resin material 15 is prevented multiple times according to the number of rows, and a single O
A conventional electronic component assembly 1 sealed with a ring 6
It has much better leakage prevention capability than

In the above embodiment, the connector body 4
Although the case where two rows of claws 43a are formed on the legs 43 of the engaging wall 41 extending to the left and right of 0 is taken as an example, three or more rows of claws 43a can be formed. The sealing property is enhanced according to the conditions.

[0018]

As described above, according to the present invention,
Attach the connector connected to the circuit board to the case that houses the circuit board on which the electronic components are mounted by engaging the male and female in a liquid-tight manner.The case that houses the circuit board and has the connector attached is filled with insulating filler. Since the connector is filled, the gap between the case and the connector can be firmly sealed only by attaching the connector to the case in a liquid-tight manner, so that the sealing means such as an O-ring can be used. Without using it, the leakage of the insulating filler material can be reliably prevented, and the assembling work by male and female engagement is simple, so the workability is extremely excellent, and the connector is attached to the case in the assembled state. Due to the male and female engagement, even if shock or vibration is applied from outside during use, there is no change in the assembling posture, and it can be used stably for a long time. Excellent effects and the like.

Further, according to the present invention, the connector is provided with a plurality of rows of claws for elastically engaging with the connector receiving portion of the case and preventing leakage of the insulating filler material. A plurality of rows of claws elastically engaged with the connector receiving part prevent the external leakage of the insulating filler in multiple layers according to the number of rows when the case is filled with the insulating filler, and a single In comparison with the conventional electronic component assembly in which sealing is performed using an O-ring, there is an effect that the leakage prevention ability is remarkably excellent.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of an electronic component assembly of the present invention.

FIG. 2 is an enlarged view of a main part of the electronic component assembly shown in FIG.

FIG. 3 is an exploded perspective view showing an example of a conventional electronic component assembly.

FIG. 4 is an exploded perspective view of a main part showing another example of a conventional electronic component assembly.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Electronic component assembly 12 Case 13 Circuit board 14 Connector 14a Connection pin terminal 15 Resin material (insulating filler) 21, 2, 23 Barrier 40 Connector main body 41 Engagement wall 42 Slit 43 Leg 43a Claw

Claims (2)

[Claims] A case for accommodating a circuit board on which electronic components are mounted, a connector connected to the circuit board, and female and male liquid-tightly engaged with a connector receiving portion of the case and mounted on the case; An electronic component assembly, comprising: an insulating filler that is filled in the case in which the circuit board is accommodated and the connector is mounted. 2. The connector according to claim 1, wherein the connector is provided with a plurality of rows of claws that are elastically engaged with a connector receiving portion of the case and prevent leakage of the insulating filler. Electronic component assembly.