JP2526978B2 - Fitting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention inserts a claw of a first member into an insertion hole of a second member, and fits the claw and the insertion hole to form a first member and a second member. The present invention relates to a fitting structure for fixing a member.

[Prior Art] Conventionally, as a structure of this type, a technology disclosed in Japanese Utility Model Laid-Open No. 60-49417 is known. This technology is called
A member) and a case (second member) are fixed to each other to form an on-vehicle instrument. This structure is shown in FIG. First member 10
The claw 103 provided with the return collar 101 and the rib 102 is provided at 0, and the second
The member 104 is provided with the frame 105 to form the insertion hole 106, and the claw 103 is inserted into the insertion hole 106 to insert the return collar 101 and the insertion hole 106.
The first member 100 and the second member 104 are fixed to each other by fitting them to each other.

[Problems to be Solved by the Invention] Not limited to the above-described vehicle-mounted instrument, a fitting structure used for a vehicle-mounted component such as a duct of a vehicle air conditioner, a holding portion of a heat exchanger, a console, and an interior material is However, in order to effectively use the limited space in the vehicle, it is required to fit in a small space.

However, in the conventional fitting structure shown above, in addition to the thicknesses A and B of the member (frame 105) forming the insertion hole 106,
The space including the thickness C of the claw 103, which is the internal dimension of the insertion hole 106, and the thickness D of the rib 102 (the thickness required for the return collar 101 to be elastically deformed by being pressed by the inner wall of the insertion hole 106) is minimized. You will need it. The thicknesses A, B, C, and D have a limit to be thinned due to strength and the like. Therefore, the conventional fitting structure has a problem that it requires a large space.

Further, as shown in FIG. 5, the conventional pawl 103 is provided so as to be slightly bent toward the return flange 101 side, and when the pawl 103 is inserted into the insertion hole 106, the pawl 103 is restored by the restoring force to the inner wall of the insertion hole 106. And the return collar 101 is provided so as not to come off the end of the insertion hole 106. As a result, the conventional fitting structure has the first member 10
When a plurality of claws 103 and insertion holes 106 are provided on the 0 and second members 104, when the first member 100 and the second member 104 are combined,
As shown in FIG. 5, there is a portion where the claw 103 is not located at the opening of the insertion hole 106. Therefore, the conventional fitting structure has a problem that the workability of inserting the claw 103 into the insertion hole 106 is poor when the plurality of claws 103 and the insertion hole 106 are provided.

Further, in the conventional fitting structure, when inserting the claw 103 into the insertion hole 106, the rib 102 is urged by the claw 103 to be inserted into the insertion hole 106.
Is pressed against the open end of the. Therefore, if the ribs 102 are formed of resin, the ribs 10 can be inserted when the claws 103 are inserted into the insertion holes 106.
The stress was concentrated on the end of No. 2, the rib 102 was scraped by the end of the insertion hole 106, and there was a problem that shavings were generated.

The present invention has been made in view of the above circumstances, and an object thereof is to fit a claw and an insertion hole in a small space and to have a good workability of fitting, and to prevent generation of shavings. It is to provide a mating structure.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a claw in which a concave portion having a thin U shape is formed on one surface while leaving a rib having a substantially U-shape on the periphery. One member and the claw are provided so that the claw can be inserted, and an opening on the side through which the claw is inserted has an insertion hole formed larger than the cross section of the claw, and the claw can be pressed in the insertion hole. A second resin member having an elastically deformable locking piece that is fitted into the recess and locks with the bottom of the rib when the claw is inserted into the insertion hole most deeply. The technical means is to have.

[Operation] In the present invention having the above configuration, when the first member and the second member are fixed to each other, the claws of the first member and the insertion holes of the second member are first aligned.

The opening of the insertion hole into which the claw is inserted is larger than the cross section of the claw. For this reason, only by aligning the claw and the insertion hole, the end of the claw enters the insertion hole without resistance.

Then, when the pawl is pressed into the insertion hole, the locking piece is pressed by the pawl and elastically deforms. As a result, the end of the claw enters the insertion hole against the locking piece.

When the claw is inserted deepest into the insertion hole, the locking piece passes over the bottom of the rib, and the locking piece fits into the recess due to the restoring force. As a result, even if the pawl works in the direction of coming out of the insertion hole, the end of the locking piece engages with the bottom of the rib, and the pawl is prevented from coming out of the insertion hole.

[Effects of the Invention] According to the present invention, with the structure in which the locking piece is fitted in the concave portion provided in the claw, it is possible to eliminate the return collar that projects from the conventional claw. For this reason, the thickness of the return collar in the insertion hole is unnecessary, and the thickness of the insertion hole can be reduced. As a result, the space for fitting the claw and the insertion hole can be reduced.

Further, since the opening of the insertion hole into which the claw is inserted is larger than the cross section of the claw that penetrates the insertion hole, simply aligning the claw with the insertion hole allows the end of the claw to penetrate into the insertion hole without resistance. . As a result, the position of the claw and the insertion hole can be easily adjusted, and the workability of fitting the claw into the insertion hole can be improved.

Further, according to the present invention, unlike the conventional rib, there is no portion where stress is concentrated, so that it is possible to suppress the generation of shavings when fitting the claw and the insertion hole.

Since the opening of the insertion hole through which the claw is inserted is formed larger than the cross section of the claw, a gap is formed between the claw and the insertion hole. Further, since the concave portion is formed by a substantially U-shaped rib that opens in the direction in which the claw comes out of the insertion hole, the claw is
The concave portion forms a gap that opens in the direction in which the claw comes out of the insertion hole.

Therefore, when the locking piece and the bottom of the rib are locked,
A space is formed by the two gaps in the direction in which the claws are pulled out from the insertion hole. By inserting a jig or the like into the space from the direction in which the claw comes out of the insertion hole and elastically deforming the locking piece outward with the jig, the locking state between the locking piece and the bottom of the rib can be released. .

In other words, by inserting a jig etc. into the above space,
The fitted first member and second member can be easily separated.

[Embodiment] Next, a fitting structure of the present invention will be described based on an embodiment shown in the drawings.

1 to 3 show a first embodiment in which the fitting structure of the present invention is applied to a housing of a vehicle instrument.

As shown in FIG. 3, the housing 1 of the vehicle instrument is
A look-back plate 3 that covers the indicating instrument 2 arranged inside.
And a body case 4 in which various indicating instruments 2 are arranged
It is configured by fixing and.

The return plate 3 is the first member of the present invention made of black ABS resin or the like, and has claws 5 that extend toward the four main body cases (lower side in the drawing) around the periphery, as shown in FIGS. 1 and 2. Are provided in plural. As shown in FIG. 2, the outer surface of the claw 5 is provided with a recessed portion 7 having a thin inside, leaving a U-shaped rib 6 at the periphery.

Further, the main body case 4 is the second member of the present invention made of resin, and around the outer periphery of the opening closed by the dial plate 3,
A plurality of frames 9 that form insertion holes 8 through which the claws 5 are inserted are provided. The opening of the insertion hole 8 on the side through which the claw 5 is inserted is provided so as to be larger than the cross section of the inserted claw 5.
As shown in FIG. 1, a gap α of about 0.5 mm is formed between the outer surface of the claw 5 and the inner surface of the frame 9. Also,
On the outside of the frame 9, a tongue-shaped locking piece 10 is provided, the lower end of which is bent inward in the drawing and presses the claw 5 in the insertion hole 8. The locking piece 10 has a lower end which is elastically deformable, and when the claw 5 is inserted into the insertion hole 8, the locking piece 10 is pressed by the rib 6 of the claw 5 and elastically deforms outward, and the rib 6 passes. When the end of the locking piece 10 is aligned with the recess 7, the locking piece 10 is restored by the restoring force of the locking piece 10.
Is provided so that the end portion of is fitted into the concave portion 7 of the claw 5. The locking piece 10 shown by the alternate long and short dash line in the figure is in a state in which the claw 5 is not inserted into the insertion hole 8.

 Next, the assembly of the above embodiment will be described.

First, the claws 5 of the dial plate 3 and the insertion holes 8 of the body case 4 are aligned.

Then, the opening of the insertion hole 8 into which the claw 5 is inserted is provided with a size obtained by adding the clearance α to the thickness C of the claw 5.
Since the claw 5 is provided so as to match the insertion hole 8, the claw 5
The plurality of claws 5 of the dial plate 3 intrude into the plurality of insertion holes 8 of the main body case 4 without resistance (the state indicated by the alternate long and short dash line in FIG. 1) simply by aligning the insertion holes 8 with the insertion holes 8.

Then, when the pawl 5 is pressed into the insertion hole 8, the locking piece 10 is pressed by the rib 6 of the pawl 5 and elastically deforms outward. As a result, the end portion of the claw 5 penetrates into the insertion hole 8 against the locking piece 10. When the claw 5 enters the insertion hole 8 and the locking piece 10 and the recess 7 coincide with each other, the end of the locking piece 10 is recessed by the restoring force.
It fits in (state of the solid line in FIG. 1).

As a result, even if a force is applied in the direction in which the dial plate 3 and the main body case 4 are separated from each other, the lower end of the locking piece 10 and the upper surface (bottom of the rib 6) of the lower end of the recess 7 are aligned with each other, and the bottom of the rib 6 is engaged. The stopper 10 is locked so that the pawl 5 cannot be pulled out from the insertion hole 8. As a result,
The return plate 3 and the body case 4 are fixed to each other to form the housing 1.

The thickness of the fitting structure of this embodiment is the sum of the thickness of the insertion hole 8 (thickness A of the main body case 4 and thickness B of the frame 9), the thickness C of the claw 5, and the gap α. The thickness (see thickness D in FIG. 6) required for the conventional return collar to be elastically deformed by being pressed by the insertion hole becomes unnecessary. As a result, the thickness of the fitting structure can be reduced by about 30% as compared with the thickness of the conventional fitting structure (the one in which the return collar is provided on the claw). Specifically, the thickness (thicknesses B, C, D in FIG. 6) protruding from the conventional fitting case 4 of the main body 4 is 6 m.
If it is m, the thickness (thicknesses B, C, α in FIG. 1) can be reduced to about 4 mm by this embodiment.

Further, since the ends of the plurality of claws 5 can easily enter the plurality of insertion holes 8 by simply aligning the claws 5 and the insertion holes 8, the claws 5 and the insertion holes 8 can be easily aligned with each other. Therefore, the workability of fitting the claw 5 into the insertion hole 8 can be improved.

Further, in the present embodiment, unlike the rib used in the conventional fitting structure, there is no portion where stress is concentrated and applied. Therefore, generation of shavings is suppressed when fitting the claw 5 and the insertion hole 8. You can

The gap α is formed between the claw 5 and the insertion hole 8 as described above. Further, since the concave portion 7 is formed by the substantially U-shaped rib 6 that is opened in the direction in which the claw 5 comes out of the insertion hole 8 (upper side in FIG. 1), the claw 5 is formed by the concave portion 7 in FIG. A gap β that opens to the upper side is formed.

Therefore, when the locking piece 10 and the bottom of the rib 6 are locked, a space x is formed by the clearance α and the clearance β in the direction in which the claw 5 comes out of the insertion hole 8. By inserting a jig or the like into the space x and elastically deforming the locking piece 10 to the outside by the jig or the like, the locked state between the locking piece 10 and the bottom of the rib 6 can be released.

That is, by inserting a jig or the like into the space x, the fitted dial plate 3 can be easily removed from the main body case 4.

 FIG. 4 shows a second embodiment of the present invention.

In this embodiment, tapered notches 11 and 12 are provided in the opening of the insertion hole 8 on the side where the claw 5 is inserted, and the claw 5 and the insertion hole 8 are provided.
It is easier to align with.

An example in which the claw is provided on the look-back plate and the insertion hole is provided in the main body case is shown, but the reverse is also possible.

(Modification) The housing 1 is usually covered with a front cover made of a transparent resin so that the indicating instrument 2 can be visually recognized from the outside while protecting the indicating instrument 2. The present invention may be applied to a fitting structure with No. 4.

Although the example in which the present invention is applied to the housing of the vehicle instrument is shown, an air conditioning duct of a vehicle air conditioner or the like composed of a plurality of combinations, a console, an interior material, a fitting portion of a heat exchanger and a holding portion, etc. It can also be applied to the fitting part of.

[Brief description of drawings]

1 to 3 show a first embodiment of the present invention. FIG. 1 is a sectional view showing an example of a fitting structure, FIG. 2 is a perspective view of the fitting structure, and FIG. 3 is a vehicle. 4 is a perspective view of a measuring instrument, FIG. 4 is a sectional view showing a second embodiment of a fitting structure,
FIG. 5 is a sectional view of a conventional fitting structure. Reference numeral 3 in the figure ... Return plate (first member) 4 ... Main body case (second member) 5 ... Claw, 7 ... Recessed portion 8 ... Insertion hole, 10 ... Locking piece

Claims (1)

(57) [Claims] 1. A first member having: (a) a claw having a concave portion having a thin internal shape formed on one surface while leaving a substantially U-shaped rib on the periphery; and (b) the claw can be inserted. And an opening on the side through which the claw is inserted is provided with a through hole that is larger than the cross section of the claw, and is provided so as to be able to press the claw within the through hole, and the claw is most likely to fit into the through hole. And a resin second member having an elastically deformable locking piece that is fitted into the concave portion and locks with the bottom of the rib when it is inserted deeply.