CN218388204U - Electrical device and vehicle comprising same - Google Patents

Abstract

The utility model relates to an electric device (100), this electric device (100) include first casing (1) and fix to second casing (2) of first casing (1) with form inner space (3) between second casing (2), this electric device (100) still including holding printed circuit board (4) in inner space (3), its characterized in that, second casing (2) with printed circuit board (4) are via passing in proper order second casing (2) with printed circuit board (4) twist and screw in screw (5) in first casing (1) are fixed to first casing (1). According to the utility model discloses, can save the turn-up operation together fixed with first casing and second casing, this equipment flow that has simplified this kind of electric device has reduced manufacturing cost. The utility model discloses still relate to a vehicle including this electric device (100).

Description

Electrical device and vehicle comprising same

Technical Field

The present invention relates to an electrical device, in particular an electronic control unit for a vehicle, and also to a vehicle comprising such an electrical device.

Background

Currently, electrical devices including printed circuit boards are widely used. For example, an electronic control unit is used in a vehicle to control a vehicle running state. Such an electric device generally includes a first housing and a second housing fixed to the first housing, with an internal space formed between the first housing and the second housing, and a printed circuit board fixed in the internal space. In assembling such an electrical device, a printed circuit board is first placed on a first housing and fixed thereto with screws, then a sealant is applied on an outer peripheral edge of the first housing, then a second housing is placed around the printed circuit board and the first housing, and finally an edge of the second housing is curled with a curling apparatus so that the second housing is fixedly connected with the first housing, thereby enclosing the printed circuit board in an inner space between the first housing and the second housing.

However, this requires an additional investment in crimping equipment and corresponding fixtures, which increases equipment costs as well as maintenance costs. Moreover, the assembly process is complicated. Therefore, there is a need to reduce the production cost and simplify the assembly process.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to solve at least one of the above problems and drawbacks in the prior art.

To this end, the present invention relates to an electrical device comprising a first casing and a second casing fixed to said first casing, an internal space being formed between said first casing and said second casing, the electrical device further comprising a printed circuit board housed in said internal space, characterized in that said second casing and said printed circuit board are fixed to said first casing via screws passing in sequence through said second casing and said printed circuit board and screwed into said first casing. Therefore, the first shell, the second shell and the printed circuit board are fixed together by the screws, and the step of fixing the first shell and the second shell by using a crimping process can be omitted, so that the assembly process of the electric device is simplified, and the equipment cost for purchasing crimping equipment and corresponding clamps and the later maintenance cost are saved.

In a preferred embodiment, the second housing includes a recess extending toward the printed circuit board, the recess being provided with a hole for a shank of the screw to pass through, a head of the screw being received in the recess. This allows sufficient space between the second housing and the printed circuit board for accommodating the electronics on the printed circuit board without the need for using screws with excessively long shanks.

In a preferred embodiment, the recess has a shape gradually increasing in size from a bottom portion, against which the head of the screw abuts, toward the open end. This allows easy placement and positioning of the screw, and easy integration of the second housing having the recess by the die-casting process.

In a preferred embodiment, a first sealant is disposed between the second housing and the printed circuit board around the screw. This can prevent moisture, dust, and the like from entering the internal space between the first casing and the second casing.

In a preferred embodiment, the first housing includes a boss extending toward the printed circuit board, the boss being for supporting the printed circuit board, the screw being screwed into a threaded hole of the boss. The bosses are arranged to support the printed circuit board, so that the positioning, the supporting and the heat dissipation of the printed circuit board can be facilitated.

In a preferred embodiment, the first housing is plate-shaped, and the second housing is U-shaped.

In a preferred embodiment, a peripheral wall of the first housing and a peripheral wall of the second housing cooperate to form the interior space, and a second sealant is disposed between the peripheral wall of the first housing and the peripheral wall of the second housing. This can ensure the formation of a closed space for accommodating the printed circuit board. Preferably, the first sealant and the second sealant are made of the same material.

In a preferred embodiment, the first housing and the second housing are each integrally formed by die casting. This allows the first case having the boss and the second case having the recess to be realized in a simple process.

In a preferred embodiment, the electrical device is an electronic control unit for a vehicle.

The utility model discloses still relate to a vehicle, its characterized in that, this vehicle includes above-mentioned electric device.

Drawings

The invention is described in detail below by way of non-limiting examples with reference to the accompanying drawings, in which:

fig. 1 is a schematic cross-sectional view of an electrical device of the present invention. The figures are purely diagrammatic and not drawn necessarily to scale, showing only those parts which are necessary in order to clarify the invention, while other parts may be omitted or merely mentioned briefly. That is, the present invention may include other components in addition to those shown in the figure.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention to those skilled in the art. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. Furthermore, it should be understood that the invention is not limited to specific described embodiments. Rather, any combination of the following features and elements, whether related to different embodiments or not, is contemplated to implement the present invention. Thus, the following features, embodiments and advantages are merely illustrative and should not be considered elements or limitations of the claims except where explicitly recited in a claim(s).

As shown in fig. 1, the electric device 100 of the present invention includes a first casing 1 and a second casing 2, the first casing 1 and the second casing 2 forming an internal space 3 therebetween, and a printed circuit board 4 accommodated in the internal space 3. The second housing 2 and the printed circuit board 4 are fixed to the first housing 1 via screws 5 which pass through the second housing 2 and the printed circuit board 4 in this order and are screwed into the first housing 1.

Thus, by fixing the first housing 1, the second housing 2 and the printed circuit board 4 together by the screws 5, the step of fixing the first housing 1 or the second housing 2 by using the crimping process can be omitted, which simplifies the assembly process of the electrical device, and saves the equipment cost for purchasing the crimping equipment and the corresponding fixture and the maintenance cost in the later period.

Since the printed circuit board 4 is usually provided with electronic components, a large distance is required between the second housing 2 and the printed circuit board 4 in order to accommodate these electronic components, which requires a large length of the shaft portion of the screw 5. However, this weakens the strength of the screw 5.

For this purpose, a recess 7 extending toward the printed circuit board 4 is provided on the second housing 2, the recess 7 is provided with a hole for the shaft of the screw 5 to pass through, and the head of the screw 5 is accommodated in the recess 7, whereby the distance between the second housing 2 and the printed circuit board 4 can be reduced and thus the length of the shaft of the screw 5 does not need to be increased.

The recess 7 may have any suitable shape. Preferably, the recess 7 has a shape gradually becoming larger in size from the bottom, against which the head of the screw 5 abuts, toward the open end, which allows easy placement and positioning of the screw 5, and easy integration of the second housing 2 having the recess 7 by a die-casting process. For example, the recess 7 has a bell mouth shape.

Since the screw 5 needs to pass through the second housing 2, there may be a gap between the screw 5 and the second housing 2, which may cause moisture, dust, etc. to enter the inner space. In order to form a seal between the screw 5 and the second housing 2, a first sealant 6 is provided around the screw 5 between the second housing 2 and the printed circuit board 4. The first sealant 6 is a sealant known in the art.

In order to facilitate the positioning, support and heat dissipation of the printed circuit board 4, a boss 8 extending toward the printed circuit board 4 is provided on the first housing 1, the boss 8 is used for supporting the printed circuit board 4, and the screw 5 can be screwed into a threaded hole of the boss 8.

Preferably, the depth of screwing of the screw 5 into the boss 8 is ensured by the torque value of the torque wrench, which allows to obtain a consistent screwing depth, on the one hand capable of ensuring a firm fastening between the first casing 1, the second casing 2 and the printed circuit board 4, and on the other hand capable of avoiding screwing of the screw 5 too deep to damage the printed circuit board 4 and the second casing 2.

In order to form a sealed space between the first housing 1 and the second housing 2, a second sealant 9 is preferably provided between the peripheral wall 11 of the first housing 1 and the peripheral wall 12 of the second housing 2. Preferably, the second sealant 9 is made of the same material as the first sealant 6.

In the embodiment of fig. 1, the first casing 1 is substantially plate-shaped, the second casing 2 is substantially U-shaped, the first casing 1 is disposed inside the second casing 2, the outer periphery of the first casing 1 faces the inner peripheral walls of the legs of the U-shape of the second casing 2, and the second sealant 9 is disposed between the outer periphery of the first casing 1 and the inner peripheral walls of the legs of the U-shape of the second casing 2.

Obviously, the first housing 1 and the second housing 2 may have any other suitable shape. For example, it is also conceivable that the first housing 1 has a flange extending in a direction toward the printed circuit board 4 at its outer edge, thereby allowing the inner peripheral wall of the first housing 1 to surround the outer peripheral wall of the second housing 2, and the second sealant 9 is provided between the inner peripheral wall of the first housing 1 and the outer peripheral wall of the second housing 2.

In a preferred embodiment, the first housing 1 and the second housing 2 are each integrally formed by die casting. This allows the first housing 1 having the boss 8 and the second housing 2 having the recess 7 to be realized in a simple process. However, it should be understood that they may be implemented by any other suitable method known in the art.

In a preferred embodiment, the electrical device 100 is an electronic control unit for a vehicle.

In assembling the above-described electric apparatus 100, the printed circuit board 4 is first placed on the boss 8 of the first housing 1, then the second sealant 9 is applied on the outer peripheral wall of the first housing 1, and the first sealant 6 is applied around the hole of the printed circuit board 4 through which the screw 5 is allowed to pass, then the second housing 2 is placed in position around the first housing 1, and finally the screw 5 is inserted through the hole made for this purpose in the second housing 2 and the printed circuit board 4 and into the threaded hole of the boss 8, and the screw 5 is screwed into position with a torque wrench, thereby enclosing the printed circuit board 4 in the closed space between the first housing 1 and the second housing 2. Compared with the prior art, the assembling process is simpler and the production cost is lower.

Furthermore, the present invention relates to a vehicle comprising the electrical device 100.

Although the present invention has been described with reference to the preferred embodiments, the present invention is not limited thereto. Various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention is to be determined by the appended claims.

Claims (9)

1. An electrical device (100), the electrical device (100) comprising a first casing (1) and a second casing (2) fixed to the first casing (1), an internal space (3) being formed between the first casing (1) and the second casing (2), the electrical device (100) further comprising a printed circuit board (4) housed in the internal space (3), characterized in that the second casing (2) and the printed circuit board (4) are fixed to the first casing (1) via a screw (5) passing through the second casing (2) and the printed circuit board (4) in sequence and screwed into the first casing (1), the second casing (2) comprising a recess (7) extending towards the printed circuit board (4), the recess (7) being provided with a hole for the stem of the screw (5) to pass through, the head of the screw (5) being housed in the recess (7).

2. The electrical device (100) according to claim 1, characterised in that the recess (7) has a shape with a progressively larger size from the bottom, against which the head of the screw (5) rests, towards the open end.

3. The electrical device (100) according to any one of claims 1 to 2, characterised in that a first sealing glue (6) is provided around the screw (5) between the second housing (2) and the printed circuit board (4).

4. The electrical device (100) according to any one of claims 1 to 2, wherein the first housing (1) comprises a boss (8) extending towards the printed circuit board (4), the boss (8) being for supporting the printed circuit board (4), the screw (5) being screwed into a threaded hole of the boss (8).

5. The electrical device (100) according to any one of claims 1 to 2, wherein the first housing (1) is plate-shaped and the second housing (2) is U-shaped.

6. The electrical device (100) according to any one of claims 1 to 2, wherein a peripheral wall (11) of the first housing (1) and a peripheral wall (12) of the second housing (2) cooperate with each other to form the inner space (3), a second sealant (9) being provided between the peripheral wall (11) of the first housing (1) and the peripheral wall (12) of the second housing (2).

7. The electrical device (100) according to any one of claims 1 to 2, wherein the first housing (1) and the second housing (2) are each integrally formed by die casting.

8. The electrical device (100) according to any one of claims 1 to 2, wherein the electrical device (100) is an electronic control unit for a vehicle.

9. A vehicle, characterized in that it comprises an electrical device (100) according to any one of claims 1 to 8.

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