JPH046808A - Adhesion structure - Google Patents

Abstract

PURPOSE:To obtain an adhesion structure where penetration state of an adhesive on an adhesion surface which cannot be seen from outside can be inspected from outside by providing an adhesive run-off groove at a position which can be seen from outside by connecting it to the adhesion surface. CONSTITUTION:In an adhesion structure where an adhesion member A and a non-adhesion member B are adhered by an adhesive 9 with a flow behavior and the adhesion surface cannot be seen from outside, an adhesive run-off groove 10 is positioned at a position where it is connected to the above adhesion surface and cannot be seen from outside. For example, the adhesive run-off groove 10 is connected to a recessed part 1 at one side of an opposing part of a U-shaped stage part 3 of a base A and is formed in plate shape so that the stage part 3 becomes deeper gradually. Then, when the adhesive 9 is applied to nearly a central part of the recessed part 1 and the electromagnet device B is engaged to the substrate A, a lower side of one leg piece 5a of a yoke 5 and the opposing recessed part 1 become an adhesion surface, the adhesive 9 is coated and penetrated into a gap between them, and the adhesive 9 flows to the adhesive run-off groove 10 if the penetration state is good.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an adhesive structure in which two members are adhered using a fluid adhesive, and the adhesive surface cannot be seen from the outside.

[Conventional technology]

When two members, that is, a bonded member and a non-bonded member, are bonded using a fluid adhesive, there are cases in which the bonded surface cannot be seen from the outside. A conventional example of the electromagnetic relay will be explained based on FIGS. 5 and 6.

A is a base, which is made of an insulating material such as synthetic resin and has the deepest rectangular recess 1 approximately in the center, and the recess 1 is surrounded by a U-shaped insulating wall 2 and a step 3. Furthermore, an outer wall 4 is provided around them. Engagement grooves 2a are formed inside both corners of the insulating wall 2 toward the recess 1 to approximately the middle depth.

Reference numeral B denotes an electromagnetic device, which is composed of a yoke 5, an iron core 6, a coil bobbin 7, and a coil 8.

The yoke 5 is made of a magnetic material such as electromagnetic soft iron, and has one leg piece 5a.
and the other leg piece 5b having retaining portions 5c on both sides, forming an abbreviated shape. The iron core 6 is connected to one leg 5a so as to be parallel to the other leg 5b. The coil bobbin 7 has flanges 7a and 7b at both ends, and has a coil 8 wound around the center thereof and arranged around the iron core 6. The flange 7a of the coil bobbin 7 is disposed in contact with one leg 5a of the yoke 5, and the area of the flange 7a is larger than that of the one leg 5a.
a is larger, so Wanibe 7atl! The shape is such that one leg piece 5a cannot be seen from the side.

In addition to the above, @M! The members constituting the relay include a movable member, a contact member, a terminal member, etc. (not shown), but since they are not directly related to the present invention, their explanation will be omitted.

Here, the state in which the base A and the electromagnet device B are engaged will be explained. Apply a fluid adhesive 9 such as liquid epoxy resin to the approximate center of the recess 1 of the base A, and insert the electromagnet device B from the direction of the arrow into the engaging portion 5c of the yoke 5. Push in while fitting until it reaches the deepest position of the engagement groove 2a of the insulating wall 2.

At this time, the lower side of one leg 5a of the yoke 5 and the recess 1 facing it become the adhesive surface, and the fluid adhesive 9 is forced out and penetrates into the slight gap that exists between them. Become. This adhesion is performed between the engaging portion 5c and the engaging groove 2a described above.
This is done when the base A and the electromagnet device 1)B are not sufficiently fitted together by just the fitting.

[Invention tries to solve! ! ! ! ff] In the conventional adhesive structure described above, when the electromagnet device B, which is a non-adhesive member, is adhered to the base A, which is an adhesive member, the fluid adhesive is usually not applied to the entire surface of the adhesive surface. As described above, the adhesive 9 is applied to a partial position, that is, approximately at the center of the recess 1, and the adhesive W19 is allowed to penetrate into the adhesive surface.

However, although the penetration state is an important factor that affects the adhesive strength, it is difficult to stabilize it because it is related to various factors such as the application position and amount of the adhesive 9 and the gap between the adhesive surfaces. For example, as shown in FIG. 4, the adhesive 9 may have penetrated only a part of the adhesive surface, or in extreme cases, the adhesive may be forgotten to be applied. It is necessary to check the status from the outside. However, since the adhesive surface is hidden by the flange 7a of the coil bobbin 7 from above and by the insulating wall 2 and outer wall 4 from the side, it is not possible to see the state of penetration of the adhesive 9 into the adhesive surface from the outside. I'm in a state where I can't do it.

The present invention has been made in view of the above-mentioned reasons, and its object is to adhere an adhesive member and a non-adhesive member using a fluid adhesive, and to create an adhesive structure in which the adhesive surface cannot be seen from the outside. In this case, there is a need to provide an adhesive structure that allows the state of penetration of the adhesive into the adhesive surface to be inspected from the outside.

[Means to solve the problem]

In order to solve the above problems, the adhesive structure of the present invention
In an adhesive structure in which an adhesive member and a non-adhesive member are adhered by a fluid adhesive and the adhesive surface cannot be seen from the outside, an adhesive outflow groove is connected to the adhesive surface and can be seen from the outside. It is set in a certain position.

[Effect]

According to the adhesive structure of the present invention, an adhesive member and a non-adhesive member are adhered using a fluid adhesive, and although the adhesive structure is such that the adhesive surface cannot be seen from the outside, the adhesive outflow groove is formed on the adhesive surface. Since the adhesive is connected and installed in a position that can be seen from the outside, the adhesive that flows into the adhesive outflow groove represents the penetration state of the adhesive on the adhesive surface, and therefore, the outflow can be prevented. By simply checking the applied adhesive, the state of penetration of the adhesive into the adhesive surface can be inspected.

[Example] A first example of the present invention will be described below based on FIGS. 1 and 2. Note that members that are substantially the same as those in the conventional example are given the same reference numerals, and parts that are different from those in the conventional example are as follows:
In other words, only the provision of the adhesive outflow groove 10 on the base A will be described.

The adhesive outflow groove 10 is connected to the recess 1 on one side of the opposing portion of the U-shaped step 3 of the base A, and is formed in a plate shape so as to gradually deepen from the step 3.

Then, as in the conventional example, a fluid adhesive 9 is applied to the approximate center of the recess 1, and when the amstone device B is engaged with the base A, one leg piece 5a of the yoke 5 is The lower side and the recess 1 facing it serve as adhesive surfaces, and the adhesive 1IPI9 is pushed out and penetrates into the slight gap that exists between them, and if the penetration state is good, as shown in Figure 2 (b). The adhesive 9 will flow out into this adhesive outflow groove 10. The reason why the adhesive outflow groove 10 is formed into a plate shape is to allow the adhesive 9 to flow out more easily.

Next, a second embodiment will be described below based on FIGS. 3 and 4. In the first embodiment described above, the adhesive outflow groove lO is provided at only one location, but in the second embodiment, it is provided at multiple locations, and substantially the same member has the same adhesive outflow groove lO. A code is attached.

The base A does not have the U-shaped insulating wall 2 as in the first embodiment, and the rectangular recess 1 is surrounded entirely by a step 3 and an outer wall 4. Adhesive outflow grooves IO having the same shape as those in the first embodiment are formed at approximately the center of each of the four sides of the stepped portion 3 surrounding the recess 1, each connected to the recess 1 at each location.

In the electromagnet device B, the shape of one leg piece 5a of the yoke 5 is the same as that of the base A.
The shape of the recess 1 is matched to the shape of the recess 1, and its area is larger than the flange 7a of the coil bobbin 7. and,
After applying the adhesive 9 to the recess 1, the electromagnetic device B is attached to the yoke 5.
The one leg piece 5a is fitted into the recess 1 and disposed on the base A, and the adhesive 9 is spread and penetrated into the adhesive surface between the lower side of the one leg piece 5a and the recess I, If the permeation state is good, the adhesive 9 will flow out into the respective adhesive outflow grooves IO. At this time, the adhesive surface into which the adhesive 9 has penetrated cannot be seen from above because the shape of the leg piece 5a matches the shape of the recess l, and from the side direction it cannot be seen from the outer wall 4. It's hidden, so you can't see it.

In such an adhesive structure, in both the first and second embodiments, the adhesive surface is hidden and cannot be seen from the outside, but the adhesive outflow groove IO is connected to the recess 1. Since it is provided at a position where it can be seen from the outside, it becomes possible to see from the outside that the fluid adhesive 9 flows out into the adhesive outflow groove 10.

In this case, by controlling the amount of adhesive 9, the distance between the gap between one leg 5a and the recess 1, which will be the adhesive surface, and the angle between one leg 5a and the other leg 5b of the yoke 5, etc. Agent outflow groove 1
If the adhesive 9 that has flowed out into the groove 0 represents the permeation state of the adhesive surface, it is possible to apply the adhesive 9 at the center of the recess 1 and at the same time as the adhesive flow groove lO, as in the first embodiment. Apply adhesive 9 only to the f! By checking this, the state of penetration of the adhesive 9 into the adhesive surface can be inspected.

In addition, if the adhesive outflow groove 10 is located only in one place, it is difficult to think that it represents the permeation state of the adhesive 9 on the adhesive surface.
In order to confirm that the adhesive has penetrated sufficiently in the opposite direction, it is sufficient to add an adhesive flow groove 1o in that direction as well, and the second embodiment shows an example of this. In other words, by providing the adhesive outflow grooves 10 at one location on each side of the recess 1, the adhesive 9 that has flowed out to the multiple locations represents the state of penetration of the adhesive 9 into the adhesive surface. , it can be inspected more reliably by confirming it from the outside.

In the second embodiment, when the adhesive outflow grooves 10 are provided at a plurality of locations, the positions can be set in various ways as shown in FIG. In the case where the application position is at one place in the center of the recess 1, Figure (a) shows the second embodiment itself, and Figure (b) shows the case where the adhesive outflow groove 10 is placed at four corners of the recess 1. It is a provision. In addition, when there are multiple application positions and the adhesive is applied to four places near each side of the recess 1 as shown in FIG. Each produces the same effects as described above.

Note that the number and position of the adhesive outflow grooves 10 are not limited to the above-mentioned embodiments, and are determined based on the relationship between the distance between the adhesive 9 application position and the adhesive outflow groove 10, the amount of application, etc. This method can be implemented as long as the adhesive that has flowed into the adhesive flow groove 10 is representative of the permeation state of the adhesive surface.

In addition, in order to make the adhesive 9 that has flowed into the adhesive outflow groove 10 clearly visible from the outside, the color of the adhesive 9 should be different from the color of the base A that forms the adhesive outflow groove 10. but,
On the other hand, if this is not desirable in terms of appearance, there is no problem if a one-component epoxy adhesive, for example, which is milky white at room temperature and becomes transparent when cured, is used as the adhesive 9.

Furthermore, in the first embodiment, as shown in FIG. 2(b), one leg piece 5a of the convex side member, that is, the yoke 5, which is mounted opposite to the recess 1 of the base A and forms an adhesive surface. The area of the leg piece 5a is smaller than the area of the recess l, and in this case, one leg piece 5a
Even though a gap exists between the side surface of the adhesive and the adhesive outflow groove 10 and the adhesive 9 has well penetrated into the adhesive surface, the adhesive 9 may not flow out into the adhesive outflow groove 10. Therefore, as in the second embodiment, the areas of the leg piece 5a and the recess 1 are made as similar as possible to reduce the gap therebetween, and the adhesive 9
It is better to ensure that once the adhesive penetrates into the adhesive surface, that is, the end of one leg 5a, it flows out into the adhesive outflow groove IO.In this case, as a secondary effect, the adhesive 9 also flows into the gap mentioned above. Since it penetrates by capillary action, the bonding area increases and the bonding strength also increases.

[Effects of the Invention] Since the adhesive structure of the present invention is made as described above, an adhesive member and a non-adhesive member are adhered using a fluid adhesive, and although the adhesive surface cannot be seen from the outside, the adhesive Since the outflow groove is connected to the adhesive surface and is provided at a position that can be seen from the outside, the adhesive that has flowed into the adhesive outflow groove represents the state of penetration of the adhesive in the adhesive surface, and therefore, Just by checking the leaked adhesive, the state of penetration of the adhesive into the adhesive surface can be inspected.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a partial sectional view of the same as above, FIG. 3 is a perspective view of a second embodiment, and FIG. FIG. 5 is a perspective view showing a conventional example, and FIG. 6 is a partial cross-sectional view of the same as above. A-m-base (adhesive member), 1--recess, 2--insulating wall, 2a--engaging groove, 3--step, 4--outer wall, B--electromagnetic device (non-adhesive) 5-Yoke, 5a--one leg piece, 5b--other leg piece,
5cm - Engagement part, iron core, coil bobbin, 7a, 7b coil, adhesive, adhesive outflow groove. Wanibe, 1st m

Claims (1)

[Claims] (1) In an adhesive structure in which an adhesive member and a non-adhesive member are adhered with a fluid adhesive and the adhesive surface cannot be seen from the outside, an adhesive outflow groove is connected to the adhesive surface and is visible from the outside. The adhesive structure is characterized in that it is provided in a position where it can be used.