JP2813296B2 - Mounting structure for box-type electrical components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-type electrical component mounting structure for mounting a box-type electrical component such as a fuse box or a connector on a mounting surface of a vehicle body.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional mounting structure of this type (see Japanese Utility Model Laid-Open No. 61-142493). That is, a tongue piece 3 serving as a locking piece is projected from the mounting surface 1a of the box-shaped electrical component 1 such as a fuse box or a connector. Further, a pair of holding pieces 7 having an L-shaped cross section are provided on the mounting surface 5 of the block B such as an electric connection box, which is a mating side. When the box-shaped electric component 1 is mounted, the tongue piece 3 is inserted between the holding pieces 7 as shown in FIG.

FIG. 5 shows a similar structure. In FIG. 5, the mounting surface 1a of the box-shaped electrical component 1 is shown.
Are provided with holding pieces 7. A tongue piece 3 as a locking piece is provided on the mounting surface 5 of the block B. Then, the holding piece 7 of the box-shaped electric component 1 is inserted so as to hold the tongue piece 3, and the mounting is performed as shown in FIG.

[0004]

However, with the structure described above, there is a risk that the tongue piece 3 may easily come off the holding piece 7 when the load W is applied to the box-shaped electrical component 1. That is, the load W applied to the front wall 1b of the box-shaped electrical component 1 is transmitted to the rear wall 1d via the side wall 1c. This force deforms the corner portion 1e of the box-shaped electrical component 1 and also deforms the rear wall 1d between the corner portion 1e and the holding piece 7, thereby easily displacing the holding piece 7. Further, a moment based on the load W acts on the holding piece 7 due to the distance from the corner portion 1e to the holding piece 7, and the holding piece 7 itself is easily deformed as shown in FIG. Due to such a deformed state, there is a problem that the box-shaped electric component 1 may easily come off due to the load W.

On the other hand, it is conceivable to increase the wall thickness of the box-shaped electric component 1 and the holding piece 7 as a whole, but this causes a problem of increasing weight and cost.

Further, it is conceivable to increase the dimensions C and D in FIG. 5, but in this case, the mounting structure itself becomes a special mode, and it cannot be connected to other existing products (for example, connectors). There's a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a box-type electrical component mounting structure which can improve mounting strength with a very simple structure.

[0008]

In order to solve the above-mentioned problems, the present invention provides a pair of holding members having an L-shaped cross section on a mounting surface of a box-type electric component, and the holding member is mounted on a mounting surface of a counterpart. In a mounting structure for a box-shaped electrical component provided with a locking piece that is inserted between and engaged with one piece, a cross section L is provided at an end of a side wall located on both sides of a holding piece on a mounting surface of the box-shaped electrical component. The auxiliary holding piece having a U-shape is provided, the height of the auxiliary holding piece protruding from the mounting surface is substantially the same as the height of the holding piece, and the L-shaped tip of the auxiliary holding piece is held by the holding means. When the box-shaped electrical component is mounted on the mounting surface of the other party, the holding piece and the auxiliary housing are provided on the mounting surface of the other side. The holding piece is in contact with the mounting surface of the other party.

[0009]

According to the present invention, when the box-shaped electric component is mounted on the mounting surface of the mating member, the pair of holding pieces and the locking pieces having an L-shaped cross section are engaged with each other, and the box-shaped electrical component is engaged. The auxiliary holding piece provided at the end of the side wall of the electrical component engages with the auxiliary locking piece of the other party. Therefore, when the load acting on the box-shaped electrical component is to act on the engagement portion between the holding piece and the locking piece from the side wall, the load is directly applied from the auxiliary holding piece at the end of the side wall to the auxiliary locking piece. Is transmitted, and deformation of the engagement between the holding piece and the locking piece, deformation of the mounting surface of the box-shaped electrical component, and the like can be suppressed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below.

The same components as those described above are denoted by the same reference numerals, and redundant description will be omitted.

FIG. 1 is a perspective view showing a state in which the box-shaped electric component 1 and the block B have been removed. In this embodiment as well, a pair of holding pieces 7 are provided on the mounting surface 1a of the rear wall 1d of the box-shaped electrical component 1 similarly to FIG. 5, and the tongue piece 3 as a locking piece is provided on the mounting surface 5 of the block B. Is provided.

On the other hand, in an embodiment of the present invention, a pair of auxiliary holding pieces 9 having an L-shaped cross section are provided on both sides of the pair of holding pieces 7. The auxiliary holding piece 9 is a mounting surface 1a of the box-shaped electrical component 1.
It is provided at the end of the side wall 1c located on both sides. Therefore, the auxiliary holding piece 9 has a configuration in which the side wall 1c is extended as it is.

The mounting surface 5 of the block B has the tongue 3
, Auxiliary locking pieces 11 having an L-shaped cross section are provided. Note that a stopper wall 11a is provided at the lower end of the auxiliary locking piece 11.

When the holding piece 7 of the box-shaped electric component 1 is inserted into the tongue piece 3 of the block B as shown by a two-dot chain line, the holding piece 7 is inserted so as to hold the tongue piece 3. The auxiliary holding piece 9 is inserted so as to hold the auxiliary locking piece 11. Therefore, the box-shaped electrical component 1 is attached to the block B as shown in FIG.

In this state, for example, the front wall 1 of the box-type electrical component 1
When a load W is applied to b, the load W is transmitted to the side wall 1c. It is transmitted from the side wall 1c to the auxiliary locking piece 11 via the auxiliary holding piece 9, and it is possible to suppress the load from acting on the rear wall 1d side. Therefore, deformation on the rear wall 1d side is suppressed. In addition, since the load is directly transmitted from the side wall 1c to the block B side via the auxiliary holding piece 9, it is possible to suppress an unreasonable moment from acting on the holding piece 7 using the corner 1e as a load input point. Therefore, the firm engagement between the holding piece 7 and the tongue piece 3 can be maintained, and the box-type electric component 1 can be prevented from coming off.

The torsional force t is applied to the box-shaped electrical component 1 by the load W.
Is applied, the load transmitted to the side wall 1c is directly transmitted to the block B side via the auxiliary holding piece 9, so that the strong attachment can be similarly maintained. That is, according to this mounting structure, it is possible to perform a strong mounting against a torsional force.

Further, since the mounting strength is improved by the engagement of the auxiliary holding piece 9 and the auxiliary locking piece 11, there is no need to increase the thickness of the entire box-type electrical component 1, thereby suppressing an increase in weight and cost. be able to. The dimensional relationship between the holding piece 7 and the tongue piece 3 does not need to be changed at all, and connection with an existing component (for example, a connector) is also possible.

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

As is apparent from the above description, according to the structure of the present invention, the auxiliary holding pieces are provided at the ends of the side walls located on both sides of the holding pieces on the mounting surface of the box-shaped electrical component. For,
When the box-shaped electrical component receives a force that presses one auxiliary holding piece against the mounting surface of the other, the reaction force is applied from the wall along the side wall of the box-shaped electrical component of the auxiliary holding piece. Input can be made to the side wall, and movement can be regulated firmly. Therefore, the auxiliary holding piece can be firmly attached, and the box-shaped electrical component can be prevented from coming off. Further, it is not necessary to increase the overall thickness, and it is possible to suppress an increase in weight and cost. Further, the dimensional relationship between the holding pieces and the locking pieces can be maintained as before, and it is possible to sufficiently cope with coupling with other existing products. Also,
Since the auxiliary holding piece has the L-shaped tip of the auxiliary holding piece facing the holding piece and has substantially the same height, the holding piece,
There are few hooking parts around the box-type electrical components including the auxiliary holding pieces, and even when transporting a large number of box-type electrical components, the box-type electrical components are prevented from mutually getting caught by the auxiliary holding pieces. And handling becomes easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view according to a first embodiment of the present invention.

FIG. 2 is an operation explanatory view of the first embodiment.

FIG. 3 is an exploded perspective view according to a conventional example.

FIG. 4 is a cross-sectional view of a main part in a coupled state according to a conventional example.

FIG. 5 is an exploded perspective view according to another conventional example.

FIG. 6 is an operation explanatory view according to another conventional example.

FIG. 7 is an operation explanatory view of a deformation state according to another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box-type electrical component, bracket 1a, 5, 15, 25 Mounting surface 3, 3c, 21 Tongue piece (locking piece) 3b, 15b Lock piece 7b, 25b Lock part 7, 17 Holding piece 9 Auxiliary holding piece 11 Auxiliary locking piece B block, adapter C Box type electrical parts

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A 5-76843 (JP, U) JP-A 1-82422 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) H05K 7/12 H05K 5/02

Claims (1)

(57) [Claims] 1. A box comprising a pair of holding pieces having an L-shaped cross section provided on a mounting surface of a box-type electrical component, and a locking piece inserted between said holding pieces and engaged on the other mounting surface. In the mounting structure of the electrical component, a supplemental retaining piece having an L-shaped cross section is provided at an end of a side wall located on both sides of the retaining piece on the mounting surface of the box-shaped electrical component,
The projecting height of the auxiliary holding piece from the mounting surface is substantially the same as the projecting height of the holding piece, and the L-shaped tip of the auxiliary holding piece faces the holding piece. Providing an auxiliary locking piece that engages with the auxiliary holding piece, wherein the holding piece and the auxiliary holding piece come into contact with the mounting surface of the other party when the box-shaped electrical component is mounted on the mounting surface of the other party. A box-type electrical component mounting structure, characterized in that: