JPS6350741Y2 - - Google Patents

Description

[Detailed explanation of the idea] Recently, labor saving, automation,
Robotization is rapidly progressing, and the installation of various leaf switches to the mechanical chassis of various electrical devices, various printed circuit boards, etc. was previously done mainly with screws, but the work has been simplified. In order to save labor and enable automation and robotization, there is a strong demand for a device that can be easily installed by a linear one-touch operation such as press engagement.

The present invention was developed in response to such a request, and a protrusion provided on the switch side is aligned linearly with an engagement hole drilled in advance at the switch mounting position on a target flat plate such as a mechanical chassis or printed circuit board. The leaf switch can be installed extremely easily with just one touch by pressing and engaging, and due to the engagement pawl provided on the protrusion and the spring action of the elastic piece, the leaf switch can be installed without wobbling. This was designed to be robust and stable.

That is, to explain the structure of the present invention with reference to its embodiments, a plurality of contact spring pieces A, B, ... with contacts a, b, ... are buried in an insulating base 1 in substantially parallel manner, and the contact spring pieces are The switch is configured so that the contacts a, b, and so on of the spring pieces A, B, and so on are brought into contact and separated (opened and closed) by applying appropriate pressing force or pressing contact to the spring pieces A, B, and so on, thereby operating the switch. In any leaf switch S, a plurality of protrusions 4 are provided that engage with engagement holes 3 drilled in advance at the switch mounting position of a flat plate 2 to which the switch is mounted, such as a mechanical chassis of various devices or various printed circuit boards. , protruding vertically downward from the mounting surface 5 of the insulating base 1, and opposing protrusions 4a, 4a of the protrusions 4.
(For example, the protruding pieces on the left and right sides of the mounting surface 5) are made to have elasticity, and an engaging claw 6 is provided protrudingly on the side surface at a position that engages with the back surface of the engaging hole 3, and the protruding piece 4
Protrusions 4b, 4b that intersect and oppose a, 4a (e.g.
The leaf switch S is attached to the target flat plate 2 by protruding one or both of the front and rear protrusions (example shown) from the tip of the elastic piece 7 extending below the mounting surface 5 by a set distance. Then, each protrusion 4 (illustrated example, 4a, 4a, 4b, 4b) of the insulating base 1 is engaged with each of the engagement holes 3, and the mounting surface 5 is pressed against the 2 surfaces of the target flat plate, Due to the engagement of the engaging claws 6 of the projecting pieces 4a, 4a with the back surface of the target flat plate 2 and the contact between the target flat plate 2 surface and the mounting surface 5, the tip of the elastic piece part 7 of the projecting piece 4b is At the same time as it comes into contact with the target flat plate surface, it forcibly rises to the set dimension against its elasticity and is bent to a position parallel to the mounting surface 5, and is engaged by the engaging claw 6 due to the repulsive force against the forced bending. After that, the leaf switch S is firmly and stably engaged with the target flat plate 2 without wobbling by just one-touch engagement operation of linearly engaging the protruding piece with the engagement hole. It is designed so that it can be installed easily.

Note that the projecting pieces 4b, 4b are mainly used for positioning, and one or both of them (in the illustrated example) can be attached to the tip of an elastic piece 7 extending diagonally downward by a predetermined distance from the mounting surface 5 of the insulating base 1. It shall be established.
Incidentally, the above-mentioned set dimensions are extremely small dimensions, and although the drawings showing the embodiment are shown at about five times the actual size and therefore appear larger, the actual dimensions are only about 0.7 mm.

First, since the engagement with the engagement hole 3 and the engagement of the engagement claw 6 is more effective if the protrusions 4a, 4a are also given elasticity outward (as shown) or inward. For example, as shown in the illustrated example, grooves 8 are formed in the mounting surfaces 5 around the bases of the protruding pieces 4a, 4a, so that the protruding pieces 4a, 4a are formed into long lengths and are provided so as to be resiliently bent.

Since the present invention has the above-mentioned structure, function, and effect, when installing the leaf switch on a mechanical chassis or printed circuit board, it is possible to simply attach the insulation to the pre-drilled engagement hole without using any screws. By simply pressing and engaging the projecting pieces of the base in a straight line, the engaging action of the engaging claws and the repulsive force of the elastic pieces make it extremely easy to create a structure that is strong and strong without wobbling. It has the great advantage of being able to be stably installed, which in turn can lead to labor savings and improved compatibility with automation and robotization.

[Brief explanation of the drawing]

Figure 1 shows an example of a leaf switch implementing the proposed mechanism (represented approximately 5 times the actual size); A is a front view, C is a side view, B is a bottom view, and Figure 2 is A-A in Figure 1.
It is a line sectional view and is a figure showing a state of attachment to a target flat plate. A, B...Contact spring piece, a, b...Contact, S...
... Leaf switch, 1 ... Insulating base, 2 ... Target flat plate, 3 ... Engagement hole, 4, 4a, 4b ... Projection piece,
5... Mounting surface, 6... Engaging claw, 7... Elastic piece,
8...Groove.

Claims (1)

[Scope of Claim for Utility Model Registration] In a leaf switch consisting of an insulating base and a plurality of contact spring pieces with contacts, a protrusion that engages with an engagement hole drilled in advance at the switch mounting position of the target flat plate, An engaging claw is provided to protrude vertically downward from the mounting surface of the insulating base, and an engaging claw is provided to protrude from the side surface of the opposing protruding piece at a position that engages with the back surface of the engaging hole. One or both of the protrusions that intersect and oppose the protrusion with claws are configured to protrude from the tip of the elastic piece that extends below the mounting surface by a set distance, and when the leaf switch is attached to the target flat plate, When each protrusion is engaged with each engagement hole and the mounting surface is pressed into contact with the target flat plate surface, and the engaging claws of the opposing protrusions are engaged with the back surface of the target flat plate, the engagement and the target flat plate Due to the contact of the surfaces, the tips of the elastic pieces of the intersecting protrusions contact the target flat plate surface, and at the same time, resist the elasticity and forcibly rise to the set dimension and bend back to a position parallel to the mounting surface. The repulsive force makes the engagement by the engagement pawl even stronger, and the switch can be moved to the target flat plate by a linear one-touch action that engages the protrusion with the engagement hole. A one-touch mounting mechanism for leaf switches, which is characterized by being provided for easy installation.