JPS6224491Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a functional shaped element that can be used as a variety of functional elements and that can be easily produced by a so-called outsert molding method.

Elements consisting of a metal substrate and protrusions in the shape of cylinders, cylinders, square columns, hooks, etc. placed on the metal substrate are useful as mechanical elements such as bearings, shafts, supports, etc., and as functional elements of watches, recorders, etc. Widely used.

Conventionally, these have been manufactured through complex metal processing processes such as sheet metal, caulking, screwing, and welding.

Therefore, there were many problems that needed to be solved, such as high production costs and a high defective rate.

Recently, due to advances in the application technology of so-called engineering plastics, such as polyacetal resins, which have excellent and well-balanced properties and are used as various functional elements in place of metals, it has become possible to fabricate elements with such shapes with only the substrate portion made of metal. However, technology is being developed to make protrusions (functional parts) from resin.

This method is called an outsert molding method because resin protrusions are molded onto holes provided in the substrate.

Normally, a large number of these shaped elements are combined and used in watches, etc., but in the above-mentioned outsert molding method, parts that combine these elements are manufactured in a single molding operation, making it a very economical method. It is.

FIG. 1 is an example of a shaped element developed to be suitable for outsert molding. That is, A is a perspective view thereof, B is a cross-sectional view, 1 is a substrate, 2 is a resin protrusion,
3 is a notch hole provided in the substrate.

Elements with this shape are becoming widely used because they can be easily manufactured by the outsert method as described above, but their use is limited because the strength of resin is lower than that of metal, and in particular, they are difficult to use when applying force from the side of a protrusion. Caution should be taken if there is a strong impact or impact force is applied.

When these elements are used as mechanical elements,
Because such forces are often applied, there is a strong demand for the development of devices that have similar functionality and can withstand harsher conditions.

In order to meet this demand, an element as shown in Fig. 2, in which a rotation stopper is attached around a cylindrical molded part, has been devised, but it is not strong enough and cannot be easily understood. Its use is limited due to its special shape.

In order to meet these demands, the inventor of the present invention has developed a functional shape element that is easy to manufacture and suitable for use as various mechanical elements under harsh conditions, and has arrived at the present invention. be.

That is, the functional element of the present invention has a plurality of symmetrical metal cores built into a metal substrate formed by cutting out and bending a metal substrate, and incorporating the plurality of metal cores into the metal substrate. Furthermore, a synthetic resin protrusion is directly connected by an outsert molding method so as to fill the remaining hole after the metal core is cut out. FIG. 3 shows an example of the shape and structure of the functional element of the present invention.

As shown in Fig. 3, a part of the metal plate 1 is cut out and bent in a direction perpendicular to the substrate at the position of the cutout protrusion 5', and in the opposite direction, it is made into a slender shape with one end left intact. At the position of the projection 5'' on the opposite end of the cutout, bend in the same direction perpendicular to the substrate to form two parallel cores 5, 5.These cores 5,5
It can be easily manufactured by adding functional resin projections 2 (and 2') as shown in FIG. 4 using an outsert molding method so as to incorporate the resin.

A board having such a shape can be manufactured using almost the same process as when manufacturing a normal outsert board.

Elements with this shape can be used as mechanical elements, such as shafts, as well as pillars for connecting with other parts,
It is used for various purposes such as fasteners such as springs. Also, since the internal structure has a metal core integrated with the metal substrate, it can be used under harsh conditions.

Although it is desirable that these cores 5, 5 are located as centrally as possible, they are not necessarily limited to the center, and both structures that reach the top of the protrusion and structures that stop halfway are useful.

After cutting out the core from the substrate, it is usually filled with resin 2' as shown in FIG. 4, but a portion can be left in if necessary. Moreover, in the present invention, it is also possible to incorporate three or more cores. Furthermore, if these core portions are short, the remaining holes may be included within the diameter of the resin protrusion and may not be visible from the outside.

Furthermore, if the protrusions are on both sides of the substrate, it is also possible to have the core exposed on both sides. It is also a preferable example that the core be deformed, such as by twisting, in order to increase its strength against bending.

Furthermore, the shape of the resin protrusion of the present invention is not limited to these, but includes a variety of shapes in order to meet the requirements of various mechanical elements. Examples include a cylindrical shape, a wall shape, a cylindrical shape with a modified external cross section, a cylindrical shape with a modified internal cross section, a screw shape, a hook shape, a prismatic shape, and the like.

In all cases, it is common that the resin protrusion 2 includes a plurality of symmetrical metal cores that are paired with the substrate.

According to the present invention, by incorporating a plurality of metal cores arranged symmetrically as described above, the dimensional accuracy of the synthetic resin protrusion (functional part) is improved compared to the case of a single metal core, and even more severe It is possible to obtain a functional shaped element having strength that can be used under various conditions.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams showing a functional shape element using the conventional outsert method, Figure 3 is a diagram illustrating an example of the functional shape element of the present invention, and Figure 4 is a diagram showing a functional shape element using the outsert method. FIG. 2 is a schematic cross-sectional view showing a molded state. 1... Substrate, 2... Functional protrusion, 5... Core,
5'...Cut hole.

Claims (1)

[Scope of utility model registration request] A metal substrate having a plurality of symmetrical metal cores integral with the substrate formed by cutting out and bending a metal substrate has the plurality of metal cores built therein, and the metal core is cut out. A functional shaped element made by directly bonding synthetic resin protrusions using the outsert molding method to fill remaining holes.