JPH0412473Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a substrate coupling structure for coupling a substrate within a case that can rotatably support, for example, a timepiece wheel train.

(Prior Art) Conventionally, for example, a board coupling structure in which a board is coupled to a case in which a watch wheel train can be rotatably supported has been proposed.
As shown in the figure, when the board 50 is inserted into the lower case 48, which has a column 42 with a holding surface 42a erected and a side wall 46 with a locking protrusion 44, the board 50
0 end 52 is the guide inclined surface 44a of the locking protrusion 44
The side wall 46 is elastically deformed in the direction of arrow C, and the moment the end 52 of the substrate 50 crosses the guide slope 44a of the locking protrusion 44, the upper end surface 52 of the substrate 50
a and the holding surface 44b of the locking protrusion 44, and the lower surface 54 and the holding surface 42a of the support column 42 are engaged, respectively, and the lower case 48 and the board 50 are coupled. Thereafter, the lower case 48 and the upper case 56 are connected by a separately provided connecting means (not shown).

However, since the side wall 46 must be elastically deformed to couple the board 50 to the lower case 48,
The force related to the deformation of the side wall 46, that is, the lower case 48
The force applied when bonding the lower case 48 and the substrate 50 is the bonding force between the lower case 48 and the substrate 50. In order to increase the bonding force between the lower case 48 and the substrate 50, the lower case 4
It is necessary to increase the force applied when bonding 8 and the substrate 50, and the conventional bonding structure has the drawback of poor assembly workability.

(Problems to be solved by the invention) The present invention was made to solve the above-mentioned conventional drawbacks, and its purpose is to solve the problems of the case and the board even if the force applied when the case and the board are connected is small. An object of the present invention is to provide a substrate bonding structure having a large bonding force between the substrate and the substrate.

(Means for Solving the Problems) In the present invention, an elastic part formed by providing slit parts in the side walls of the case on both sides of the board holding claw is provided upright in the other case, and is engaged with the elastic part on the outside of the case. and a connecting piece that polymerizes with the slit to achieve the above object.

(Example) An example of the present invention will be described below based on the drawings.
FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, and FIGS. 3 and 4 are explanatory views of the combination. Here, 2 is a case body formed by combining an upper case 4 and a lower case 6, and a watch mechanism body (not shown), for example, is housed inside the case body.

As shown in FIGS. 1 and 2, the side wall 8 having the joint surface 8a at the upper end of the lower case 6 is formed with two slits 10, 10, so that the side wall 8 has an elastic material that can be elastically deformed. A section 12 is provided.
The elastic part 12 has a substrate holding claw 14 having a tapered guide slope 14a and a holding surface 14b on the inside with respect to the lower case 6, and a tapered guide slope 16a and a holding surface 16b on the outside. A locking pawl 16 is provided respectively. On the other hand, the side wall 1 of the upper case 4
8 is provided with a connecting piece 24 consisting of two elastically deformable legs 20, 20 and a connecting part 22, and an opening 26 surrounded by the legs 20, 20 and the connecting part 22, The locking pawl 16 can be inserted and removed. The connecting portion 22 of the connecting piece 24 has an opening 26 of the locking claw 16.
A tapered guide inclined surface 22a for facilitating insertion into the locking member 16, and an engaging surface 22b that engages with the holding surface 16b of the locking claw 16 are provided. In addition, the locking claw 1
It is sufficient that at least one of the connecting portion 6 or the connecting portion 22 is formed into a tapered guiding slope.

Next, the connection between the board 28, the lower case 6, and the upper case 4 will be explained.

First, as shown in FIG. 3, the board 2 is placed inside the lower case 6.
8, the lower end 28a of the board 28 engages with the guide slope 14a of the board holding claw 14, elastically deforming the elastic part 12 in the direction of arrow A, and the lower end 28a of the board 28 engages with the guide slope 14a of the board holding claw 14. The moment it passes the tip 14c, the upper end surface 30 of the board 28 and the board holding claw 1
The holding surfaces 14b of No. 4 are engaged, and the holding surfaces 34a provided on the pillars 34 etc. installed upright in the lower case 6 are engaged with the lower surface 32 of the board 28, so that the lower case 6 and the board 28 are combined. be able to.

Next, as shown in FIG. 4, when the upper case 4 is joined to the lower case 6 to which the board 28 is joined, the connecting portion
The guiding slope 22a of the locking pawl 16 engages with the guiding slope 16a of the locking pawl 16, elastically deforming the connecting piece 24 in the direction of arrow B, and the engaging surface 22b of the connecting portion 22 engages with the guiding slope 16a of the locking pawl 16.
At the moment when the guide slope 16a of 6 is crossed, the locking pawl 16
is inserted into the opening 26, and the holding surface 1 of the locking claw 16
6b and the engagement surface 22b of the connecting portion 22 are engaged, and at the same time, the joint surface 8a of the side wall 8 and the joint surface 1 of the side wall 18 are engaged with each other.
8a, the upper case 4 and lower case 6
are combined.

Here, the characteristic feature of the present invention is that the board holding claw 14 for locking the board 28 is not simply provided on the side wall, but is provided on the elastic part 12 consisting of slit parts 10, 10 on both sides. This elastic part 1
2 is a connecting piece 24 when the upper and lower cases 4 and 6 are connected.
By engaging the connecting portion 22 of the elastic portion 12 with the locking claw 16 of the elastic portion 12, it is possible to prevent bending toward the connecting piece 24 side. Therefore, board 2
Even if the pressing force at the time of inserting 8 into the lower case 6, that is, the elastic force related to the elastic part 12, is small, the substrate 2
8 is connected within the upper and lower cases 4 and 6 with a large bonding force.

Moreover, the elastic part 12 has a slit part 1 in the side wall 8.
0, 10, when the upper and lower cases 4, 6 are connected, the leg parts 20, 20 of the connecting piece 24 are formed by providing the slit parts 10, 10.
Since it is arranged in front of the upper and lower cases 4 and 6, it prevents dirt and dust from entering into the upper and lower cases 4 and 6.

(Effects of the invention) According to the invention, even if the board is connected to one case with a small bonding force, the board is connected with a large bonding force inside the case body when the cases are connected, so the assembly work efficiency is improved. It is possible to provide a substrate bonding structure for a case that has good effects such as a strong bonding force between the substrates, and it is also possible to prevent dirt and dust from entering through the slit.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention. Second
The figure is a front view of Figure 1. FIG. 3 and FIG. 4 are combination explanatory diagrams. FIG. 5 is a sectional view of a conventional example. 4...Top case, 6...Bottom case, 12,36
...Elastic part, 14, 37...Substrate holding claw, 24,
40...Connection piece, 28...Substrate.

Claims (1)

[Scope of Claim for Utility Model Registration] In a coupling structure in which a board is connected by a board holding claw provided inside the side wall of one of the upper and lower cases and a support provided upright within the case, both sides of the board holding claw a case substrate comprising: an elastic section formed by providing a slit section on the side wall of the case; and a coupling piece that is installed upright on the other case, engages the elastic section on the outside of the case, and overlaps with the slit. bond structure.