JP7113780B2 - In-vehicle electronic equipment - Google Patents

Description

The present invention relates to on-vehicle electronic equipment.

When screwing several types of monitor units with different mounting positions to the housing, a mounting member with multiple sets of screw holes was used to absorb the positional differences for each type of monitor unit. (See Patent Document 1, for example). The mounting member is attached to the housing, and the monitor unit is screwed into one of a plurality of sets of screw holes provided in the mounting member.

JP-A-2002-175023

Since the conventional mounting member is provided with a plurality of sets of screw holes, there is a problem that the strength of the mounting member is lowered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to suppress deterioration in strength when several types of second housings having different mounting positions are mounted to a first housing.

An in-vehicle electronic device according to the present invention includes a first housing having a front opening end that opens to the front and an upper opening end that opens to the top, and is screwed to the front opening end of the first housing. an upper cover attached to the upper opening end of the first casing; through holes for screw fastening provided in the front opening end; and through holes in the front cover. A screw hole provided at a corresponding position for fastening a screw, a positioning protrusion protruding from the front side of the upper opening end toward the front cover, and a positioning protrusion provided at a position corresponding to the positioning protrusion on the front cover. a constricted portion provided in the constricted portion; a positioning recess provided in the constricted portion that engages with the positioning protrusion to position the first housing and the front cover; and a joint.

According to this invention, by preparing a front cover for each of the second housings having different mounting positions, a large number of screw holes are provided for each of the second housings having different mounting positions with respect to one front cover. As compared with , the decrease in strength of the front cover can be suppressed.

1 is a front side perspective view showing a configuration example of an in-vehicle electronic device according to Embodiment 1; FIG. 1 is a rear side perspective view showing a configuration example of an in-vehicle electronic device according to Embodiment 1; FIG. 1 is a rear view showing a configuration example of an in-vehicle electronic device according to Embodiment 1; FIG. 4A and 4B are side views showing the in-vehicle electronic device to which two types of second housings with different mounting positions are mounted. 5A and 5B are rear views showing configuration examples of two types of front covers of the second housing with different mounting positions. 4 is a top view showing a configuration example of an upper housing part according to Embodiment 1. FIG. FIG. 4 is a rear side perspective view showing a configuration example of an upper housing portion according to Embodiment 1; 4 is a front side perspective view showing a configuration example of an upper cover according to Embodiment 1. FIG. 1 is a top view showing a configuration example of an in-vehicle electronic device according to Embodiment 1; FIG. FIG. 10 is a cross-sectional view taken along the line AA of FIG. 9; FIG. 10 is a cross-sectional view taken along line BB of FIG. 9;

Embodiment 1.
FIG. 1 is a front side perspective view showing a configuration example of an in-vehicle electronic device 1 according to Embodiment 1. FIG. FIG. 2 is a rear side perspective view showing a configuration example of the in-vehicle electronic device 1 according to the first embodiment. FIG. 3 is a rear view showing a configuration example of the in-vehicle electronic device 1 according to Embodiment 1. FIG. The in-vehicle electronic device 1 includes a first housing 10, a second housing 20, and an upper cover 30, and the first housing 10, the second housing 20, and the upper cover 30 are configured integrally. The on-vehicle electronic device 1 is, for example, a car navigation device, and a box-shaped portion composed of a first housing 10 and an upper cover 30 is fitted into an installation space formed in a dashboard of a vehicle. The monitor 21 of the second housing 20 faces the passenger compartment side in a state in which the box portion is fitted in the installation space.

This second housing 20 comprises a monitor 21 , a frame panel 22 and a front cover 23 . A frame-shaped panel 22 made of a resin member or the like holds the monitor 21 so as to surround the monitor 21 from the top, bottom, left, and right. A front cover 23, which is a sheet metal member, is attached to the rear portion of the frame-like panel 22 by screw fastening or the like. The front part of the frame-shaped panel 22 is open, and the screen of the monitor 21 is exposed.

The first housing 10 includes an upper housing portion 11 , a lower housing portion 12 and a rear cover 13 . In the illustrated example, the first housing 10 is configured by stacking an upper housing portion 11 and a lower housing portion 12 vertically. The upper housing portion 11, the lower housing portion 12, the rear cover 13, and the upper cover 30 are sheet metal members.
The first housing 10 may be composed of a plurality of housing parts as shown in the drawing, or may be composed of one housing part.

The upper housing portion 11 has two opposing side surfaces and one bottom surface that connects the two side surfaces. Similarly, the lower housing part 12 has two opposing side surfaces and one bottom surface connecting these two side surfaces. The upper housing portion 11 has an open top, and an upper cover 30 is attached to the upper open end 11a (see FIGS. 6 and 7 described later) by screw fastening or the like. The upper portion of the lower housing portion 12 is open, and the bottom surface of the upper housing portion 11 is attached to the upper opening end by screw fastening or the like. The rear portions of the upper housing portion 11 and the lower housing portion 12 are opened, and a rear cover 13 is attached to the rear opening ends by screw fastening or the like. The front portions of the upper housing portion 11 and the lower housing portion 12 are open, and a front cover 23 of the second housing 20 is attached to the front opening end 11b (see FIGS. 6 and 7 described later). It is attached by screw fastening or the like.

When assembling the in-vehicle electronic device 1 , first, the upper housing portion 11 and the lower housing portion 12 are attached, and then the rear cover 13 is attached, thereby forming the first housing 10 . A front cover 23 of the second housing 20 is attached to the front opening end 11 b of the first housing 10 . After that, the upper cover 30 is attached to the upper open end 11 a of the first housing 10 from above the first housing 10 .

A configuration in which several types of second housings 20 having different mounting positions can be attached to the front opening end 11b of the first housing 10 will be described below.
4A and 4B are side views showing the in-vehicle electronic devices 1A and 1B to which two types of second housings 20A and 20B with different mounting positions are mounted. The second housing 20A includes a monitor 21A, a frame panel 22A, and a front cover 23A. The second housing 20B includes a monitor 21B, a frame panel 22B, and a front cover 23B.
There are two types of the second housing 20, that is, the second housings 20A and 20B, while the first housing 10 and the upper cover 30 are of one type.

5A and 5B are rear views showing configuration examples of front covers 23A and 23B of two types of second housings 20A and 20B having different mounting positions. The surfaces shown in FIGS. 5A and 5B of the front covers 23A and 23B face the front open end 11b of the first housing 10. As shown in FIGS.

In the following description, the vehicle-mounted electronic device 1A, the second housing 20A, the monitor 21A, the frame-shaped panel 22A, and the front cover 23A, the vehicle-mounted electronic device 1B, the second housing 20B, the monitor 21B, the frame-shaped panel 22B, and the front cover 23B, "A" or "B" is added to the end of the code. If there is no need to distinguish between the two, the symbols "A" and "B" are not added.

As shown in FIGS. 4A and 4B, the mounting position of the second housing 20B with respect to the first housing 10 is lower than the mounting position of the second housing 20A with respect to the first housing 10 . The mounting structure is such that the second housing 20A and the second housing 20B having different mounting positions in the vertical direction can be mounted to the first housing 10 of one type. It is provided at a different position vertically from the housing 20B. Here, the mounting structure of the second housing 20A includes screw holes 24a, 24b, 24c, 24d, 24e, and 24f provided in the front cover 23A; It includes mating claws 27a, 27b and protrusions 28a, 28b. The mounting structure of the second housing 20B includes screw holes 24a, 24b, 24c, 24d, 24e, and 24f provided in the front cover 23B, narrowed portions 25a and 25b, positioning concave portions 26a and 26b, and elastic fitting claws 27a. , 27b and projections 28a, 28b.

The screw hole 24 a is provided at a position corresponding to the through hole 14 a provided in the front opening end 11 b of the first housing 10 . Similarly, the screw holes 24b, 24c, 24d, 24e and 24f are provided at positions corresponding to the through holes 14b, 14c, 14d, 14e and 14f of the first housing 10, respectively. Six screws (not shown) pass through the through holes 14a, 14b, 14c, 14d, 14e and 14f and are fastened to the screw holes 24a, 24b, 24c, 24d, 24e and 24f.

Thus, the front cover 23A is provided with screw holes 24a, 24b, 24c, 24d, 24e, and 24f corresponding to the mounting positions of the second housing 20A, and the front cover 23B is provided with screw holes 24a, 24b, 24c, 24d, 24e, and 24f. Screw holes 24a, 24b, 24c, 24d, 24e, and 24f corresponding to the mounting positions are provided. Since the front cover 23 is prepared for each of the second housings 20 with different mounting positions, compared to the case where one front cover 23 is provided with a large number of screw holes for each of the second housings 20 with different mounting positions. As a result, a decrease in the strength of the front cover 23 can be suppressed.

5A and 5B, the screw holes 24a, 24b, 24c, 24d, 24e, and 24f are provided on three sides of the front cover 23: right, left, and bottom. is not provided on one side of the On one side of the upper side of the front cover 23, drawn portions 25a, 25b, positioning recesses 26a, 26b, elastic fitting claws 27a, 27b, and projections 28a, 28b are provided instead of screw holes.

The narrowed portions 25a and 25b have a concave shape in which the front cover 23 protrudes toward the monitor 21 side. The drawn portions 25a and 25b are formed by drawing, for example. Positioning concave portions 26a and 26b for engaging with positioning convex portions 16a and 16b (see FIGS. 6 and 7 described later) are provided in the constricted portions 25a and 25b. The space on the concave side of the narrowed portions 25a and 25b, that is, the space facing the front opening end 11b of the first housing 10 is a space for avoiding interference between the front cover 23 and the first housing 10. .

When the drawn portions 25a and 25b are formed by drawing, the drawn portions 25a and 25b preferably extend from the positions of the positioning recesses 26a and 26b to the upper end of the front cover 23. FIG. With this shape, the narrowed portions 25a and 25b having different sizes can be easily formed between the front cover 23A and the front cover 23B.

The elastic fitting claws 27a and 27b are elastically displaceable claws that are open at least at the upper side. The elastic fitting claws 27a and 27b are, for example, plate springs formed by cutting and raising a part of the front cover 23 in a U shape, and the upper side is a free end and the lower side is a fixed end. The elastic fitting claws 27a and 27b are provided with projections 28a and 28b projecting toward the front cover 23 side.

FIG. 6 is a top view showing a configuration example of the upper housing portion 11 according to the first embodiment. FIG. 7 is a rear side perspective view showing a configuration example of the upper housing portion 11 according to the first embodiment. FIG. 8 is a front side perspective view showing a configuration example of the upper cover 30 according to Embodiment 1. FIG. FIG. 9 is a top view showing a configuration example of the in-vehicle electronic device 1B according to the first embodiment. 10 is a cross-sectional view taken along the line AA in FIG. 9. FIG. 11 is a cross-sectional view taken along the line BB in FIG. 9. FIG.
Here, a case where the front cover 23B is attached to the first housing 10 and the upper cover 30 is illustrated. Since the front cover 23B and the front cover 23A only differ in the position of the mounting structure and the mounting structure itself is the same, an example of the case where the front cover 23A is mounted is omitted.

The upper housing portion 11 is formed with an upper open end 11a and an upper half of the front open end 11b. The lower half of the front open end 11 b corresponds to the front open end of the lower housing portion 12 . The upper housing portion 11 is provided with positioning protrusions 16a and 16b that protrude from the front side of the upper opening end 11a toward the front cover 23 side. The width of the positioning projections 16a and 16b on the tip side is narrower than the width on the base side. A narrow portion of the positioning protrusion 16 a on the distal end side engages with the positioning recess 26 a of the front cover 23 . Similarly, the narrow portion of the positioning projection 16 b on the distal end side engages with the positioning recess 26 b of the front cover 23 . The front cover 23 and the first housing 10 are positioned by engaging the positioning protrusions 16a and 16b with the positioning recesses 26a and 26b.

FIG. 11 shows the length E of the narrow portion of the positioning protrusion 16a on the tip side. As shown in FIG. 11, the drawing depth D of the drawing portion 25a is deeper than the base of the positioning projection 16a and shallower than the tip of the positioning projection 16a. Similarly, the drawing depth of the drawn portion 25b is deeper than the base of the positioning projection 16b and shallower than the tip of the positioning projection 16b. With this configuration, it is possible to position the first housing 10 and the front cover 23B while preventing the first housing 10 from interfering with the front cover 23B.

As shown in FIG. 8, the end portion of the upper cover 30 on the front cover 23 side is a bent portion 37 that is bent toward the first housing 10 side. When the upper cover 30 is attached to the first housing 10, the bent portions 37 are inserted into the elastic fitting claws 27a and 27b provided on the front cover 23 from above. Fitting holes 38a and 38b are provided in the bent portion 37 at positions corresponding to the projections 28a and 28b.

As shown in FIG. 10, the protrusion 28a and the fitting hole 38a are fitted with the bent portion 37 inserted into the elastic fitting claw 27a. Similarly, the projection 28b and the fitting hole 38b are fitted with the bent portion 37 inserted into the elastic fitting claw 27b. By fitting the protrusions 28a, 28b into the fitting holes 38a, 38b, the bent portion 37 is less likely to come off from the elastic fitting claws 27a, 27b, and the elastic fitting claws 27a, 27b and the bent portion 37 are securely connected. Contact. Due to the contact between the elastic fitting claws 27a and 27b and the bent portion 37, the noise resistance performance of the in-vehicle electronic device 1 can be ensured. Further, by fitting the protrusions 28a and 28b into the fitting holes 38a and 38b, it is not necessary to provide a screw hole on the upper side of the front cover 23. FIG.

The elastic fitting claws 27a and 27b, the protrusions 28a and 28b, the bent portion 37, and the fitting holes 38a and 38b constitute the fitting portion 2 for fitting the front cover 23 and the upper cover 30 together. .

As shown in FIG. 9, the upper portion of the front cover 23B is provided with a marking 29a indicating the position of the elastic fitting claw 27a and a marking 29b indicating the position of the elastic fitting claw 27b. Similar markings 29a and 29b are also provided on the upper portion of the front cover 23A. The upper part of the upper cover 30 is provided with a marking 39a indicating the position of the protrusion 28a that engages with the elastic fitting claw 27a, and a marking 39b indicating the position of the projection 28b that engages with the elastic fitting claw 27b. . The markings 29a, 29b, 39a, 39b are linear marks formed by, for example, stamping. Also, the markings 29a, 29b, 39a, 39b may be seals or the like. Since the markings 29a, 29b and the markings 39a, 39b can be used as marks when the operator attaches the upper cover 30, the misalignment of the fitting position can be visually confirmed. Therefore, the assemblability of the in-vehicle electronic device 1 is improved.

As described above, the vehicle-mounted electronic device 1 according to Embodiment 1 includes the first housing 10, the second housing 20, the upper cover 30, the through holes 14a, 14b, 14c, 14d, 14e, and 14f. , screw holes 24 a , 24 b , 24 c , 24 d , 24 e , 24 f , positioning projections 16 a , 16 b , narrowed portions 25 a , 25 b , positioning recesses 26 a , 26 b , and fitting portion 2 . The first housing 10 has a front opening end 11b that opens to the front and an upper opening end 11a that opens to the top. The second housing 20 has a front cover 23 screwed to the front open end 11b of the first housing 10 . The upper cover 30 is attached to the upper open end 11 a of the first housing 10 . Through holes 14a, 14b, 14c, 14d, 14e, and 14f for screw fastening are provided at the front open end 11b. The screw holes 24a, 24b, 24c, 24d, 24e, and 24f are provided in the front cover 23 at positions corresponding to the through holes 14a, 14b, 14c, 14d, 14e, and 14f. The positioning protrusions 16a and 16b are shaped to protrude from the front side of the upper opening end 11a toward the front cover 23 side. The narrowed portions 25 a and 25 b are provided at positions corresponding to the positioning convex portions 16 a and 16 b on the front cover 23 . The positioning recesses 26 a and 26 b are provided in the narrowed portions 25 a and 25 b and engage with the positioning protrusions 16 a and 16 b to position the first housing 10 and the front cover 23 . The fitting portion 2 fits the front cover 23 and the upper cover 30 together. According to this configuration, since the front cover 23 is prepared for each of the second housings 20 having different mounting positions, one front cover 23 has a screw hole for each of the second housings 20 having different mounting positions. A reduction in the strength of the front cover 23 can be suppressed as compared with the case where a large number of them are provided.

Further, according to Embodiment 1, the fitting portion 2 is provided on the elastic fitting claws 27a and 27b, which are provided on the front cover 23 and are open at the upper side, and on the elastic fitting claws 27a and 27b. projections 28a, 28b; bent portions 37 formed by bending the end portion of the upper cover 30 on the front cover 23 side; , and fitting holes 38a, 38b into which the protrusions 28a, 28b are fitted. Thereby, the in-vehicle electronic device 1 can ensure anti-noise performance (EMC: Electromagnetic Compatibility). Moreover, the vehicle-mounted electronic device 1 can reduce the number of screws by using the fitting portion 2 instead of screw fastening.

Further, according to Embodiment 1, the drawing depth D of the drawing portions 25a and 25b is deeper than the roots of the positioning projections 16a and 16b and shallower than the tips of the positioning projections 16a and 16b. This configuration enables positioning while avoiding interference between the front cover 23 and the first housing 10 .

Further, according to Embodiment 1, the narrowed portions 25a and 25b extend from the positioning concave portions 26a and 26b to the upper end of the front cover 23. As shown in FIG. With this configuration, the narrowed portions 25a and 25b can be easily formed.

Further, according to Embodiment 1, marks 29a, 29b, 39a, and 39b indicating the positions of the fitting portions 2 are provided on the upper portion of the front cover 23 and the upper portion of the upper cover 30, respectively. This configuration improves the ease of assembly of the in-vehicle electronic device 1 .

In addition, in Embodiment 1, an example is shown in which the second housing 20 is a monitor unit having the monitor 21, but the second housing 20 is not limited to a monitor unit.
Moreover, in Embodiment 1, an example in which the mounting position of the second housing 20 is different vertically has been described, but the mounting position may be different horizontally.

Within the scope of the invention, any component of the embodiment can be modified, or any component of the embodiment can be omitted.

Reference Signs List 1, 1A, 1B in-vehicle electronic device 2 fitting portion 10 first housing 11 upper housing portion 11a upper opening end 11b front opening end 12 lower housing portion 13 rear cover 14a, 14b, 14c, 14d, 14e, 14f through holes 16a, 16b positioning projections 20, 20A, 20B second housing 21, 21A, 21B monitors 22, 22A, 22B frame panels 23, 23A, 23B front cover 24a, 24b, 24c, 24d, 24e, 24f screw hole 25a, 25b constricted portion 26a, 26b positioning recess 27a, 27b elastic fitting claw 28a, 28b projection 29a, 29b marking 30 upper cover, 37 bending portion, 38a, 38b fitting hole, 39a, 39b marking, D drawing depth of drawing portion, E length of positioning convex portion.

Claims (5)

a first housing having a front open end that opens to the front and an upper open end that opens to the top;
a second housing having a front cover screwed to the front open end of the first housing;
an upper cover attached to the upper open end of the first housing;
a through hole for screw fastening provided at the front open end;
screw holes for screw fastening provided at positions corresponding to the through holes in the front cover;
a positioning projection projecting from the front side of the upper opening end toward the front cover;
a narrowed portion provided at a position corresponding to the positioning convex portion on the front cover;
a positioning concave portion provided in the narrowed portion for engaging with the positioning convex portion to position the first housing and the front cover;
An in-vehicle electronic device comprising a fitting portion for fitting the front cover and the upper cover. The fitting portion is
an elastic fitting claw with an open top provided on the front cover;
a projection provided on the elastic fitting claw;
a bent portion in which the end portion of the upper cover on the front cover side is bent and is inserted into the elastic fitting claw from above;
2. The in-vehicle electronic device according to claim 1, further comprising a fitting hole formed in said bent portion into which said protrusion is fitted. 2. The in-vehicle electronic device according to claim 1, wherein a drawing depth of said drawn portion is deeper than a root of said positioning projection and shallower than a tip of said positioning projection. 2. The in-vehicle electronic device according to claim 1, wherein the narrowed portion extends from the positioning recess to the upper end of the front cover. 2. The in-vehicle electronic device according to claim 1, wherein an upper portion of said front cover and an upper portion of said upper cover are marked with marks indicating positions of said fitting portions.

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