JP3508808B2 - Parts assembly structure - Google Patents

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 parts such as resin molded parts, and more particularly to an assembling structure for parts that can be firmly fixed and joined together without causing clearance.

[0002]

2. Description of the Related Art As a structure for assembling components in the production of electronic equipment, for example, as shown in FIGS. The first part 1 having the fitting elastic locking pawls 5a is slid and fitted together, whereby the third part 3
There is an assembly structure in which the first and second parts 1 and 2 are fixed with a screw 10 while sandwiching and fixing.

More specifically, the slide joint surface 4 of the first component 1 is provided with a leaf spring portion 5, the lock pawl 5a is provided at the tip portion thereof, and the fitting projection portion 6 is provided on the side surface portion. Further, a pressing portion 8 is provided on the tip side.

The fitting hole 12 is formed in the slide joint surface 11 of the second component 2 and the fitting groove 13 into which the fitting projection 6 is fitted is formed in the side surface portion, and the pressing portion is formed. 8
A fitting pin 14a is provided on the flange portion 14 with which the first component 1 abuts, and the hole 8a of the pressing portion 8 is inserted. The first component 1 is slidably fitted onto the second component 2. In a state where the third component 3 is sandwiched and fixed by being engaged with each other, screws are fixed through the screw holes 7 and 15 of the slide joint surfaces 4 and 11.

The above-mentioned assembly structure is an insulating structure when the first and second parts 1 and 2 are resin molded parts, for example, when the third part is a printed circuit board and an electric signal is flowing. In the case of concern or patterning due to vibration, there is no concern about disconnection, which is advantageous especially when a compact design is required.

[0006]

However, as shown in FIG. 8, the lock claw 5a is caused by the variation of the parts at the time of manufacture.
There is a drawback that clearances S1 and S2 are generated between the fitting hole 12 and the fitting hole 12 and between the pressing portion 8 and the third component 3, and the backlash remains and is fixed even after the screw fixing.

Further, in the resin molded product, as shown in FIG. 7, the slide joint surface 11 is formed with a slight taper T1 necessary for releasing from the molding die.
This is a cause of widening the clearance.

An object of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide an assembly structure of parts in which the parts can be securely coupled and fixed without causing a clearance or the like.

[0009]

According to a first aspect of the present invention, there is provided a second component having a fitting hole, and an elastic structure for fitting into the fitting hole. It has a lock claw and is made up of a first part that is slidably connected to the second part. By connecting the two, the third part is pinched and fixed, and in this state the first part In a structure for assembling a component and a second component with screws, the whole or a part of the slide joint surface of one of the first and second components is slid on the other component. It is formed on the slope with a larger inclination angle than the taper required for molding on the joint surface,
It is characterized in that the one part is bent by the tightening at the time of fixing the screw so that no clearance is generated in the holding part for holding the third part.

According to another aspect of the present invention, there is provided a second component having a fitting hole, and an elastic locking claw fitted in the fitting hole, which is different from the second component. And a first part that is slid and connected to each other. By connecting the two parts, the third part is sandwiched and fixed, and in this state, the first part and the second part are screwed together. In the assembly structure described above, a protrusion is provided opposite to the slide joint surface of one of the first and second components, and the one component is bent by the tightening when the screws are fastened to the third component. It is characterized in that no clearance is generated in the sandwiching portion that sandwiches the above component.

According to a third aspect of the present invention, substantially the front half of the slide joint surface of one component is formed as a slope having a larger inclination angle than the taper required for molding formed on the slide joint surface of the other component. It is characterized in that the substantially rear half portion is provided with parallel protrusions whose upper surfaces are formed as slopes.

According to a fourth aspect of the present invention, the protrusion is provided on the slide joint surface of the first component.

According to a fifth aspect of the present invention, at least the first component is a resin molded component.

[0014]

When the first part and the second part are fixed with the screw, the other part is bent by the tightening at the time of fixing the screw and the third part is fixed.
There is no clearance in the sandwiching portion that sandwiches the component, and the component is securely fixed.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an assembly structure of parts of the present invention will be described with reference to FIGS. 1 to 3, but the same components as the conventional components described with reference to FIGS. The same reference numerals are given and detailed description thereof is omitted.

In the present invention, the slide joint surface 11 has the second part 2 on the main body side having the fitting hole 12, and the elastic locking claw 5a fitted in the fitting hole 11. , A first component 1 that is slidably coupled to the second component 2, and the third component 3 is clamped and fixed by coupling the first component 1 and the first component 1 to each other in this state. In the assembly structure of the components configured to screw the second component 2 with the screw 10, one of the first component and the second component, in the embodiment, the slide joint surface 4 of the first component 1 The whole or a part of it is formed on the slope of the other part, in the embodiment, the slide joint surface 11 of the second part 2 having an inclination angle T2 larger than the taper T1 required for molding, and is used for the screw fastening. The third component is formed by bending the first component by tightening. In which the clearance is configured so as not to cause the clamping portion for clamping (8, 14) a.

A holding part (8, 1) for holding the third part 3 by bending the first part by tightening the screws.
For the purpose of preventing a clearance from occurring in 4), the projection 9 may be provided opposite to the slide joint surface 4 of the first component 1 without forming the slide joint surface 4 on an inclined surface. .

The first and second parts 1 and 2 are resin molded parts. In the embodiment, the substantially first half of the slide joint surface 4 of the first part 1 is the slide joint surface 11 of the second part 2.
Is formed on an inclined surface having an inclination angle T2 larger than the taper T1 required for molding, and the projection 9
Are provided in parallel with the upper surface as a slope.
The slope of the upper surface of the protrusion is for adjusting the angle, and does not have to be the same as the inclination angle T2 of the slide joint surface of the front half.

When the first component 1 is joined to the second component 2, the fitting protrusion 6 is in the fitting groove 13 and the fitting pin 14a is in the hole 8a.
In addition, the lock claws 5 a are fitted into the fitting holes 12, respectively, and the third component 3 is sandwiched between the pressing portion 8 and the flange portion 14 and fixed by being screwed with the screw 10.

Screw the first component 1 and the second component 2 into a screw 10.
When the screws are fastened with, the first component 1 is pulled toward the second component 2 side and fixed by the tightening force. As a result, the pressing portion 8 comes into close contact with the third component 3 and can be firmly fixed. In addition, although the protrusion is provided as the protrusion 9 in the embodiment, a similar effect can be obtained by a simple protrusion.

[0019]

The first part and the second part are combined to form the third part.
If the first component and the second component are screwed together, the first component is attracted to the second component side, and there is no clearance between the first component and the third component. Since the clearance between the dowel and the locking pawl is not a problem, this allows the third part to be firmly fixed.

[Brief description of drawings]

FIG. 1 is a perspective view of a first component showing an embodiment of a component assembly structure of the present invention.

FIG. 2 is a sectional view showing a state before screw fixing.

FIG. 3 is a sectional view showing a state in which a screw is fixed.

FIG. 4 shows a first component in a conventional component assembly structure, (A) is a perspective view of a slide joint surface side, and (B) is a rear perspective view.

FIG. 5 is an exploded perspective view showing a state before the first component is coupled.

FIG. 6 is a perspective view showing a completed state of coupling.

FIG. 7 is a sectional view showing a taper required for molding a resin molded part.

FIG. 8 is a cross-sectional view showing a clearance generation state.

[Explanation of symbols]

1st part 2 Second part 3rd part 4 Slide joint surface of the first part 5 Leaf spring 5a lock claw 9 protrusion 10 screws 11 Sliding joint surface of the second part 12 Mating hole T2 Slant joint surface of first part and inclination angle of ridge

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H05K 7/12

Claims (5)

(57) [Claims] 1. A second part having a fitting hole and an elastic locking claw fitted in the fitting hole, wherein the second part is slidably connected to the second part. In the structure for assembling parts, the first part and the second part are screwed together in this state by sandwiching and fixing the third part by joining them together. The whole or a part of the slide joint surface of one of the first component and the second component is formed on an inclined surface having an inclination angle larger than the taper required for molding formed on the slide joint surface of the other component. A structure for assembling components, wherein one of the components is bent by the tightening at the time of fixing the screw so that no clearance is generated in a sandwiching portion for sandwiching the third component. 2. A second part having a fitting hole and an elastic locking claw fitted in the fitting hole, wherein the second part is slidably connected to the second part. In the assembly structure of parts, the first part and the second part are screw-fastened in this state by sandwiching and fixing the third part by joining them together. A protrusion is provided opposite to the slide joint surface of either one of the first component and the second component, and the one component is bent by the tightening at the time of screwing to clamp the third component. A structure for assembling parts, characterized in that no clearance is generated in the. 3. A substantially front half portion of a slide joint surface of one component is formed on an inclined surface having an inclination angle larger than a taper formed on the slide joint surface of the other component and required for molding, and a substantially rear half portion thereof. 3. The assembly structure of parts according to claim 2, wherein the projections whose upper surfaces are sloped are provided in parallel. 4. The method of claim 2 or 3 assembled structure component according to, characterized in that the protrusion provided on the slide joint surface of the first component. 5. The assembly structure of parts according to claim 1, 2, 3 or 4, wherein at least the first part is a resin molded part.