JPH11101205A - Assembling structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily join a case body and an assembling member by forming a projecting part to press a joining piece to the engaging part side abutting on a jig or a prescribed base stand in assembling, on an outside surface of the case body corresponding to the joining piece. SOLUTION: A case body 10 has a hook-shaped joining piece 101 to join/fix a light conductive plate 14 by engaging with an engaging part 141 formed on the light conductive plate 14, a joining member. In the case body 10, a projecting part 107 to press the joining piece 101 to the engaging part 141 side abutting on a jig A in assembling, is formed on its outside surface. Therefore, when the light conductive plate 14 is laminated on the case body 10, or when the light conductive plate 14 is pressed to the jig A side after being laminated on the case body 10, the engaging piece 101 is pressed to the light conductive plate 14 (the engaging part 141) side through the projecting part 107 of the case body 10 abutting on the jig A by its reaction. The joining piece can be fitted/joined to the engaging part by this pressing force, and the light conductive plate 14 can be easily and reliably joined to the case body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling structure for assembling a resin case body with another case body or a connecting member made of a plate body such as a substrate, which is paired with the resin case body, to form a unit.
For example, the present invention relates to an assembling structure employed in a small electric / electronic device such as an instrument device.

[0002]

2. Description of the Related Art Conventionally, for example, in an instrument device for a vehicle, connecting members such as a circuit board, a plate made of a light guide plate, a middle case, and a separate case made of a transparent case are attached to an instrument case (case body). When connecting and assembling and fixing, screws, screws, and the like have been used. In recent years, however, it has become mainstream to assemble each member using hook-shaped connecting pieces.

FIG. 6 is a sectional view showing an example of an instrument device having such an assembling structure. The instrument device includes an instrument case (case body) 1 and an instrument body 2 disposed in front of the instrument case 1. Circuit board 3 conductively fixed to the front surface
A reflection case 4 disposed in front of the circuit board 3 so as not to cover the instrument body 2 and reflecting light of a light source (not shown) forward; and the light source arranged in front of the reflection case 4 with the instrument body 2 interposed therebetween. Light guide plate 5 for guiding the light of
And an instrument dial 6 illuminated with light guided by the light guide plate 5. These components are an instrument case 1, a circuit board 3 with an instrument body 2, and a reflection case. 4, the light guide plate 5, and the instrument dial 6 are sequentially assembled in a stacked state.

The circuit board 3 with the meter body 2, the reflection case 4, and the light guide plate 5 are fixed to the instrument case 1 by assembling the circuit board 3 and the light guide plate 5 in front of the reflection case 4. The engaged surface 1b of the hook-shaped coupling portion 1a formed on the instrument case 1 and stacked forward is formed on the engagement surface 5a of the engaging portion 5a formed on the light guide plate 5 as a coupling member.
b. As a result, the circuit board 3 and the reflection case 4 are assembled between the instrument case 1 and the light guide plate 5 in a state of being sandwiched therebetween. As described above, the circuit board 3 with the meter body 2, the reflection case 4, and the light guide plate 5 can be assembled to the instrument case 1 only by one-touch engagement between the coupling portion 1 a and the engagement portion 5 a. Work and the like become unnecessary, and workability can be improved. In this case, the instrument dial 5 is attached and fixed to the front side of the light guide plate 5 with double-sided tape.

[0005]

However, in such an assembling structure using the hook-shaped connecting portion 1a,
It is necessary to prevent rattling due to generation of a gap between the engaged surface 1b of the connecting portion 1a and the engaging surface 5b of the engaging portion 5a to maintain a good connection state. Since the length L up to the surface 1b cannot have a dimensional margin, even if the light guide plate 5 as a coupling member is laminated on the circuit board 3 and the light guide plate 5 is further pressed toward the circuit board 3, Coupling part 1a
May not be securely engaged with the engaging portion 4a, which necessitates manual pressing of the instrument case 1 or the connecting portion 1a with a large force, which leads to a reduction in assembly efficiency. Was.

The present invention has been made in view of the above, and an object of the present invention is to provide an assembling structure capable of facilitating the joining of a joining member to a case body and improving the assembling work efficiency.

[0007]

According to the present invention, in order to achieve the above object, a hook-shaped connecting piece projecting from a case body is engaged with an engaging portion formed on a predetermined connecting member. An assembling structure for joining a joining member to the case body, wherein the joining piece is brought into contact with an outer surface of the case body corresponding to the joining piece by abutment with a jig or a predetermined base during assembly. A protruding portion is formed to be pressed toward the portion.

[0008] Further, the connecting piece and the protruding portion are provided on a tongue piece formed so as to be independently displaceable in the case body.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the connecting structure of a case body and a connecting member according to the present invention, a hook for connecting and fixing an assembling member by engaging the case body with an engaging portion formed on the connecting member. The coupling member has a shape, and a projection is formed on the outer surface of the case body to contact the jig at the time of assembly to press the coupling piece toward the engaging portion, so that the coupling member can be connected to the case body. In this case, the connecting piece is pressed toward the connecting member through the projecting portion of the case body that comes into contact with the jig, and the pressing force causes the connecting between the case body and the connecting member, thereby increasing the assembling work efficiency.

[0010] In the case body, since the connecting piece and the protruding portion are provided on the tongue piece formed to be independently displaceable on the case body, the connecting piece is easily displaced toward the engaging portion.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a vehicle instrument system according to the present invention; FIG.

FIG. 1 is an exploded perspective view of the instrument device, FIG. 2 is a sectional view of a main part showing an assembled state of FIG. 1, and FIG. 3 is a perspective view showing a joint portion of a case body.

In FIG. 1, a meter device includes a resin case body 10, a circuit board 11, a resin reflection case 12, a meter main body 13, a resin light guide plate 14, a meter dial 15, a pointer 1 and the like.
6, a resin facing case 17 and a transparent cover 18, a plurality of light emitting diodes 110 as light emitting elements are conductively fixed to the circuit board 11, and an instrument body 13 is conductively connected to the reflective case 12 on the circuit board 11. An opening 120 corresponding to the instrument main body 13 is formed to fix the light guide 1.
4 and the instrument dial 15 are formed with respective shaft holes 140 and 150 through which the drive shaft 130 of the instrument main body 13 penetrates, and the dial case 16 has an opening through which the hands 16 and a predetermined area of the instrument dial 15 can be visually recognized. 170 are formed.

Assembling of these components is performed in the order of the circuit board 11 → reflection case 12 → instrument body 13 → light guide plate 14 → instrument dial 15 → indicator 16 → turning case 17 → transparent cover 18 based on the case body 10. The instrument dial 15 is fixed to the light guide plate 14 by a double-sided tape (not shown) using a circuit board 11 and a reflective case 1.
2. Fixing the case body 10 and the facing case 17 with the instrument body 13 and the light guide plate 14 interposed therebetween is performed by inserting the hook 171 formed on the periphery of the facing case 17 into the hook receiving hole 100 of the case body 10. The fitting of the transparent cover 18 to the return case 17 is performed by fitting and connecting the hook 181 formed on the periphery of the transparent cover 18 to the hook receiving hole 172 formed in the return case 17 by fitting. Each is done.

In this case, the circuit board 11, the reflection case 12, the instrument body 13, and the light guide plate 14, which are interposed between the case body 10 and the return case 17, are formed by hook-shaped connecting pieces formed on the case body 10. Case body 10 through 101
And is fixed.

As shown in FIGS. 2 and 3, a plurality of connecting pieces 101 are formed so as to protrude from a predetermined portion of the base 102 constituting the bottom of the case body 10 in the direction in which the components are stacked. A base 103 extending substantially vertically from the plate surface direction of 102 and penetrating the circuit board 11 and the reflective case 12, and an engaging portion 141 protruding substantially vertically from the base 103 and formed on the light guide plate 14 as a coupling member. The engagement piece 104 is provided between the case body 10 and the light guide plate 14 for engaging and fixing the circuit board 11, the reflection case, and the instrument main body 13 between the case body 10 and the light guide plate 14. In this case, the coupling piece 101 is By forming a slit 105 in the base portion 102, the tongue piece 106 is easily cantilevered and easily formed into a cantilever shape on the tip end side.

At the position corresponding to the connecting piece 101 on the outer surface of the case body 10, in this case, on the outer surface of the tongue piece portion 106, it protrudes in a direction opposite to the direction in which the connecting piece 101 (base 103) extends. In addition, a projection 107 is formed which comes into contact with the jig (base) A at the time of assembling and presses the connecting piece 101 toward the engaging portion 141.

As described above, in the present embodiment, the hook-shaped coupling piece 101 for coupling and fixing the light guide plate 14 by engaging the case body 10 with the engaging portion 141 formed on the light guide plate 14 as the coupling member. Further, the case body 10 has an outer surface, which is in contact with the
When the light guide plate 14 is stacked on the case body 10 or when the light guide plate 14 is stacked on the case body 10 and then pressed on the jig A side by forming the protruding portion 107 that presses the light guide plate 01 to the engagement portion 141 side. The coupling piece 101 is connected to the light guide plate 14 through the protrusion 107 of the case body 10 which comes into contact with the jig A by the reaction force.
It is pressed to the (engaging portion 141) side, and by this pressing force, the connecting piece can be fitted and connected to the engaging portion, whereby the light guide plate can be easily and reliably connected to the case body.
The assembling work efficiency can be improved.

In this embodiment, the connecting piece 101 and the protruding portion 107 of the case body 10 are provided on the tongue piece 106 which is easily formed independently, so that the connecting piece 101 is located on the engaging portion side. The projection 10
7 and light guide plate 14 for case body 10 through jig A
Are more easily combined.

In the present embodiment, the tongue piece 106 is formed by providing a slit in the case body 10.
As another embodiment, as shown in FIG. 4, the tongue piece 106 can be formed by a projecting piece that partially projects from the peripheral edge of the case body 10.

Whether or not the position where the coupling piece 101 is to be formed is the elastically deformable tongue piece 106 as in this embodiment can be appropriately set according to the material of the case body 10 and its strength. If the coupling piece 101 can be displaced toward the engaging portion 141 when the light guide plate 14 is assembled, it is not necessary to form the tongue piece 106 without forming the tongue piece 106.

In this embodiment, the connecting piece 101 is formed in the middle of the case body 10, but it may be formed on the outer peripheral edge of the case body 10 as shown in FIG.
Although the jig A having a flat surface facing the case body 10 was used, as shown in FIG.
When the formation position of 1 is away from the bottom surface of the case body 10, the jig A may be provided with a stepped portion A1 so as not to lengthen the protruding portion 107.

In this embodiment, an example in which the coupling structure according to the present invention is applied to the coupling structure between the instrument case as the case body 10 and the light guide plate 14 as the coupling member has been described. 17 and the joint structure between the return case 17 and the case body 10. Further, the application of the coupling structure according to the present invention is not limited to the instrument device.

[0024]

As described above in detail, according to the present invention, the coupling member is formed by engaging the hook-shaped coupling piece projectingly formed on the case body with the engaging portion formed on the predetermined coupling member. An assembling structure for coupling to the case body, wherein the outer surface of the case body corresponding to the coupling piece is brought into contact with a jig or a predetermined base during assembly to press the coupling piece toward the engaging portion. By forming the projecting portion, the connection between the case body and the assembling member is facilitated, and the assembling work efficiency can be improved.

Further, according to the present invention, since the connecting piece and the projecting portion are provided on the tongue piece formed to be independently displaceable on the case body, the connecting piece can be easily displaced toward the engaging portion. As a result, the case body and the assembly member can be easily combined.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an instrument device.

FIG. 2 is an essential part cross-sectional view showing an assembled state of FIG. 1;

FIG. 3 is a perspective view showing a coupling portion of a case body.

FIG. 4 is a perspective view of a main part showing another embodiment.

FIG. 5 is a sectional view of a main part showing another embodiment.

FIG. 6 is a sectional view of a main part showing a conventional example.

[Explanation of symbols]

 Reference Signs List 10 case body 14 light guide plate (coupling member) 101 coupling piece 107 projecting portion 106 tongue piece 141 engaging portion A jig (base)

Claims (2)

[Claims] 1. An assembling structure in which a hook-shaped connecting piece protruding from a case body is engaged with an engaging portion formed on a predetermined connecting member to connect the connecting member to the case body. A protrusion is formed on an outer surface of the case body corresponding to the coupling piece to press the coupling piece toward the engaging portion by abutting on a jig or a predetermined base during assembly. Assembly structure. 2. The assembly structure according to claim 1, wherein said connecting piece and said protruding portion are provided on a tongue piece formed to be independently displaceable on said case body.