JP2000030812A - Connecting structure of resin moldings - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure of resin moldings, which is simple and has superior durability against a vibration and a shock, and in which a play in the connected resin moldings is prevented almost indefinitely. SOLUTION: Engaging ribs 11 formed on one resin molding 10 and engaging grooves 21a of slide blocks 21 formed on the other resin molding 20 are slidingly connected with each other. In this connecting structure of the resin moldings 10, 20, the engaging ribs 11 are thinly formed while the engaging grooves 21a of the slide blocks 21 are formed in a wave shape. Thereby, when the engaging ribs 11 and the engaging grooves 21a of the slide blocks 21 are slidingly connected with each other, these are elastically contacted with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for joining resin molded products to each other, and more particularly to a structure having a simple structure, excellent in durability against vibration and impact, and having a looseness of the joined resin molded products. The present invention relates to a joint structure of a resin molded product capable of maintaining a prevention effect semipermanently.

[0002]

2. Description of the Related Art A conventional structure for joining resin molded products is described below.
This will be described with reference to FIGS. FIG. 5 shows a conventional joint structure of a resin molded product, and FIG.
FIG. 3 is a perspective view of a main part before connection, and FIG. 3B is a cross-sectional view of the connection process.

As shown in FIGS. 1A and 1B, one resin molded product (for example, a resin case of a fuse box) 110 mounted inside a vehicle is mounted on another resin molded product (for example, a connector). Conventionally, when the resin housing 120 is mechanically coupled, the engagement ribs 111, 11 integrally formed on the outer wall surface 110A of one resin molded product 110 are formed.
1, an engaging groove 121a, 1 of a slide block 121 integrally formed on an outer wall surface 120A of another resin molded product 120.
21a was slide coupled.

However, the engagement ribs 111, 111
By simply sliding the engagement grooves 121a, 121a, the engagement ribs 11a receive vibrations during traveling of the vehicle.
There is a problem that rattling occurs between the engaging grooves 121a and the engaging grooves 121a. In order to prevent such rattling, conventionally, any one of the upper and lower inner walls of the engaging grooves 121a and 121a is provided. In this case, the protruding ridges 122, 122 parallel to the engaging ribs 111, 111 are provided.

According to such a configuration, the engagement rib 11
When the engaging grooves 121a and 121a are slid and coupled with the engaging grooves 121a and 121a,
122 is pressed against the engaging ribs 111, 111, and the play between the engaging ribs 111, 111 and the engaging grooves 121 a, 121 a, that is, the play of the other resin molded product 120 can be prevented. .

[0006]

However, in the above-described conventional structure for joining resin molded articles, if the vibrations during running of the vehicle continue to be received, the ridges 122, 122 for preventing rattling are worn. Thereafter, there is a problem that rattling occurs between the engagement ribs 111, 111 and the engagement grooves 121a, 121a.

[0007] That is, in the conventional joint structure of the resin molded product, despite the fact that the vehicle is a durable consumer material used for many years, the rattling prevention effect is lacking, and the ridges 122, 122 are worn. Thereafter, there is a problem that abnormal noise is generated due to rattling of the other resin molded product 120 or the other resin molded product 120 is dropped by external impact.

The present invention has been made in view of the above problems, and has a simple structure, has excellent durability against vibrations and shocks, and has a semi-permanent effect of preventing rattling of a joined resin molded product. It is an object of the present invention to provide a joint structure of a resin molded product which can be maintained at a low temperature.

[0009]

In order to achieve the above object, a connecting structure of a resin molded product according to the first aspect of the present invention includes an engaging rib provided on one resin molded product and a connecting rib provided on another resin molded product. In a coupling structure of a resin molded product in which an engagement groove of a slide block provided is slidably coupled to each other, either one of the engagement rib or the slide block is curved into a waveform, and the Either the curved side or the non-curved side is thinned to have flexibility, and when these engaging ribs and the engaging grooves of the slide block are slidably coupled to each other, the two are elastically contacted. .

According to such a configuration, when the engagement rib and the engagement groove of the slide block are slidably coupled to each other, either the thinned engagement rib or the slide block is flexibly deformed and repelled. The two are elastically contacted by the force. Therefore, even when one or another resin molded product receives vibration or impact, the vibration and impact can be absorbed by the elastic contact between the engagement rib and the engagement groove.

As a result, even if one or the other resin molded product is continuously subjected to vibration or impact for a long period of time, the coupling force between the engaging rib and the engaging groove is not reduced, and the durability is excellent. It is possible to semi-permanently prevent rattling of other resin molded products.

In addition, the above-described improvement in durability and semi-permanent prevention of rattling can be achieved by a simple configuration in which the engaging rib or the slide block is curved in a waveform and either one of the ribs or the slide block is thinned. Can be.

Specifically, the following configuration is preferable. As described in claim 2, the engagement rib may be thinned and the engagement groove of the slide block may be curved in a waveform.

According to such a configuration, when the engagement rib and the engagement groove are slid and connected, the engagement rib having a reduced thickness is
It is flexibly deformed along the engagement groove curved in a waveform, and generates a repulsive force against the engagement groove. As a result, the engaging ribs and the engaging grooves are brought into elastic contact, so that rattling of one or another resin molded product is prevented.

According to a third aspect of the present invention, one of the upper and lower wall portions forming the engagement groove of the slide block may be made thinner and curved in a waveform.

According to such a configuration, when the engagement rib and the engagement groove are slid and connected, one of the upper and lower wall portions of the engagement groove that is thinned and curved in a wavy manner is engaged with the engagement rib. , And is flexibly deformed to generate a repulsive force against the engagement rib. As a result, the engaging ribs and the engaging grooves are brought into elastic contact, so that rattling of one or another resin molded product is prevented.

According to a fourth aspect of the present invention, both the upper and lower wall portions forming the engagement grooves of the slide block may be made thinner and curved in a waveform.

According to such a configuration, when the engagement rib and the engagement groove are slid and joined, both the upper and lower wall portions of the engagement groove which are thin and curved in a waveform are connected to the engagement rib. When pressed, it is flexibly deformed and generates a repulsive force against the engagement rib. As a result, the engaging ribs and the engaging grooves are brought into elastic contact, so that rattling of one or another resin molded product is prevented.

According to a fifth aspect of the present invention, the engaging rib is made thinner and curved in a waveform.

According to such a configuration, when the engagement rib and the engagement groove are slid and coupled, the engagement rib, which is thinned and curved in a waveform, is pressed by the upper and lower walls of the engagement groove. And deforms flexibly to generate a repulsive force against the engagement groove. As a result,
The engagement rib and the engagement groove are elastically contacted to prevent rattling of one or another resin molded product.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a joint structure of a resin molded product according to an embodiment of the present invention.
First, the connection structure of the resin molded product according to the first embodiment of the present invention will be described. FIG. 1 shows a joint structure of a resin molded product according to a first embodiment of the present invention, and FIG.
FIG. 3 is a perspective view of a main part before connection, and FIG. 3B is a cross-sectional view of the connection process.

In FIG. 1A, reference numeral 10 denotes one resin molded product, for example, a resin case such as a fuse box or an electric connection box. On the other hand, reference numeral 20 denotes another resin molded product, which corresponds to a resin housing such as a connector.

One resin molded product 10 is previously mounted inside a vehicle, and another resin molded product 20 is coupled to one resin molded product 10 via the resin molded product coupling structure according to the present embodiment. It is made to let.

On the outer wall surface 10A of one resin molded product 10,
A pair of right and left engagement ribs 11 are integrally formed. Each of the engagement ribs 11 is a thin plate-like body and has flexibility.

On the outer wall surface 20A of another resin molded product 20,
A pair of left and right slide blocks 21 and 21 are integrally formed. Each of the slide blocks 21 and 21 is formed with an engagement groove 21a, 21a curved in a waveform.

Here, as shown in FIG. 1B, the minimum width L2 of the engagement grooves 21a, 21a is smaller than the thickness L1 of the engagement ribs 11, 11. Thereby, the engagement groove 21
When the engagement ribs 11 and 11 are slidably coupled to the engagement ribs 11 and 11, the engagement ribs 11 and 11 are flexibly deformed along the waveform of the engagement grooves 21a and 21a.

According to the joint structure of the resin molded product of the present embodiment having the above configuration, as shown in FIG. 1B, the engagement ribs 11 of one resin molded product 10 and the other resin molded product When the engagement grooves 21a, 21a of the product 20 are slid and joined, the thinned engagement ribs 11, 11 are flexibly deformed along the engagement grooves 21a, 21a curved in a wave form, and the engagement grooves 2
A repulsive force is generated for 1a and 21a. As a result, the engaging ribs 11, 11 elastically contact the engaging grooves 21a, 21a, and rattling of the other resin molded product 20 is prevented.

Even when the first and second resin molded products 10 and 20 are subjected to vibration or impact, the vibrations and shocks are caused by the elastic contact between the engaging ribs 11 and the engaging grooves 21a and 21a. Can absorb shock.

As a result, the first and second resin molded articles 10, 2
0, even if it receives vibration or impact for a long period of time, the coupling force between the engaging ribs 11, 11 and the engaging grooves 21a, 21a does not decrease, the durability is excellent, and the other resin molded product 20 is protected. It is possible to semi-permanently prevent rattling.

Further, the engagement ribs 11, 11 are thinned,
With a simple configuration in which the engagement grooves 21a, 21a of the slide block 21 are curved in a waveform, the above-described improvement in durability and semi-permanent prevention of rattling can be achieved.

Next, the connection structure of the resin molded product according to the second embodiment of the present invention will be described. 2A and 2B show a joint structure of a resin molded product according to a second embodiment of the present invention. FIG. 2A is a perspective view of a main part before joining, and FIG. is there.

In FIG. 2A, one resin molded product 30
A pair of left and right engagement ribs 31, 31 are integrally formed on the outer wall surface 30A. On the other hand, a pair of left and right slide blocks 41, 41 are integrally formed on the upper wall surface 40A of the other resin molded product 40.

In this embodiment, the upper walls 41A, 41A forming the engaging grooves 41a, 41a of the slide blocks 41, 41 are made thinner and curved in a waveform.

Here, as shown in FIG. 2B, the maximum width L4 of the corrugated upper wall portions 41A, 41A is the width between the outer wall surface 30A of one resin molded product 30 and the engagement ribs 31, 31. It is larger than L3. Thus, when the engagement ribs 31, 31 and the engagement grooves 41a, 41a are slid, the upper wall portion of the corrugated press-fitted between the outer wall surface 30A of one resin molded product 30 and the engagement ribs 31, 31 is formed. 41A, 41A is pressed by the engagement ribs 31, 31, and is flexibly deformed.

According to the resin-molded article coupling structure of the present embodiment having the above configuration, as shown in FIG. 2B, when the engagement ribs 31, 31 and the engagement grooves 41a, 41a are slid and coupled. , Thin and corrugated engagement groove 4
1a, 41a, the upper wall portions 41A, 41A
1, 31 to be flexibly deformed.
31 is generated. As a result, the engagement rib 3
1, 31 and the engaging grooves 41a, 41a make elastic contact with each other, so that rattling of the other resin molded product 40 can be semi-permanently prevented.

Next, the connection structure of the resin molded product according to the third embodiment of the present invention will be described. 3A and 3B show a joint structure of a resin molded product according to a third embodiment of the present invention. FIG. 3A is a perspective view of a main part before joining, and FIG. 3B is a sectional view of the joining process. is there.

In FIG. 3A, one resin molded product 50
A pair of left and right engagement ribs 51, 51 are integrally formed on the outer wall surface 50A. On the other hand, a pair of left and right slide blocks 61, 61 are integrally formed on the outer wall surface 60A of the other resin molded product 60.

In the present embodiment, the upper walls 61A, 61A and the lower walls 61B, 61B forming the engagement grooves 61a, 61a of the slide blocks 61, 61 are made thinner and curved in a waveform. There is a configuration.

Here, as shown in FIG. 3B, the minimum width L6 of the engaging grooves 61a formed by the corrugated upper wall portions 61A, 61A and the lower wall portions 61B, 61B is one resin. The thickness is smaller than the thickness L5 of the engagement ribs 51 of the molded product 50. Thus, when the engagement ribs 51, 51 and the engagement grooves 61a, 61a are slid and coupled, the corrugated upper wall portions 61A, 61A and lower wall portions 61B, 61B are pressed by the engagement ribs 51, 51. It becomes flexibly deformed.

According to the joint structure of the resin molded product of the present embodiment having the above structure, as shown in FIG. 3B, when the engaging ribs 51, 51 and the engaging grooves 61a, 61a are slid and joined. , Thin and corrugated engagement groove 6
1a, 61a, upper wall portions 61A, 61A and lower wall portion 61B,
61B is pressed by the engagement ribs 51, 51 to be flexibly deformed,
A repulsive force is generated against the engagement ribs 51,51. As a result, the engaging ribs 51, 51 and the engaging grooves 61a, 61a are brought into elastic contact with each other, so that rattling of the other resin molded product 60 can be semi-permanently prevented.

Next, the connection structure of the resin molded product according to the fourth embodiment of the present invention will be described. 4A and 4B show a joint structure of a resin molded product according to a fourth embodiment of the present invention. FIG. 4A is a perspective view of a main part before joining, and FIG. 4B is a sectional view of the joining process. is there.

In FIG. 4A, one resin molded product 70
A pair of left and right engaging ribs 71, 71 are integrally formed on the outer wall surface 70A. In the present embodiment, the engagement ribs 71, 7
1 is made thinner so as to have flexibility and to be curved in a waveform.

On the other hand, the outer wall surface 80A of another resin molded product 80
, A pair of left and right slide blocks 81, 81 are integrally formed. Each of the slide blocks 81 has an engaging groove 81a.

Here, as shown in FIG. 4B, the width L8 of the engagement grooves 81a, 81a is smaller than the maximum width L7 of the engagement ribs 71, 71 of one resin molded product 70. Thereby, when the engaging ribs 71, 71 and the engaging grooves 81a, 81a are slid and coupled, the corrugated engaging ribs 71, 71
Is pressed by the engaging grooves 81a, 81a and is flexibly deformed.

According to the joint structure of the resin molded product of the present embodiment having such a structure, as shown in FIG.
When the engagement ribs 71, 71 and the engagement grooves 81a, 81a are slid and coupled, the engagement ribs 71, 71 which are thinned and curved in a waveform are pushed by the engagement grooves 81a, 81a to be flexible. It deforms and generates a repulsive force against the engagement grooves 81a. As a result, the engagement ribs 71, 71 and the engagement grooves 81a,
81a is elastically contacted, and it is possible to prevent rattling of another resin molded product 80.

[0046]

As described above, according to the joint structure of the resin molded product of the present invention, it has excellent durability against vibrations and shocks and has a simple structure, while preventing the joined resin molded product from rattling. The effect can be maintained semi-permanently.

[Brief description of the drawings]

FIGS. 1A and 1B show a joining structure of a resin molded product according to a first embodiment of the present invention, wherein FIG. 1A is a perspective view of a main part before joining, and FIG. It is.

FIGS. 2A and 2B show a joining structure of a resin molded product according to a second embodiment of the present invention, wherein FIG. 2A is a perspective view of a main part before joining, and FIG. It is.

3A and 3B show a joint structure of a resin molded product according to a third embodiment of the present invention, wherein FIG. 3A is a perspective view of a main part before joining, and FIG. It is.

FIGS. 4A and 4B show a joining structure of a resin molded product according to a fourth embodiment of the present invention, wherein FIG. 4A is a perspective view of a main part before joining, and FIG. It is.

5A and 5B show a conventional resin-molded product coupling structure, in which FIG. 5A is a perspective view of a main part before coupling, and FIG. 5B is a cross-sectional view of a coupling process.

[Explanation of symbols]

 10, 30, 50, 70 One resin molded product 11, 31, 51, 71 Engagement rib 20, 40, 60, 80 Other resin molded product 21, 41, 61, 81 Slide block 41A, 61A Upper wall portion 61B Lower wall 21a, 41a, 61a, 81a Engagement groove

Claims (5)

[Claims] 1. A coupling structure of a resin molded product in which an engagement rib provided on one resin molded product and an engagement groove of a slide block provided on another resin molded product are slidably connected to each other. Either the mating rib or the slide block is curved into a waveform, and either one of the ribs or the non-curved portion is thinned to have flexibility, and these engagements are performed. A coupling structure for a resin molded product, wherein when a rib and an engagement groove of a slide block are slidably coupled to each other, the two elastically contact each other. 2. The resin-molded product coupling structure according to claim 1, wherein said engaging rib is thinned, and said engaging groove of said slide block is curved in a waveform. 3. The resin-molded article coupling structure according to claim 1, wherein one of the upper and lower wall portions forming the engagement groove of the slide block is made thinner and curved in a waveform. 4. The joint structure for a resin molded product according to claim 1, wherein both the upper and lower wall portions forming the engagement groove of the slide block are thinned and curved in a waveform. 5. The resin-molded article coupling structure according to claim 1, wherein said engagement rib is thinned and curved in a waveform.