JPS59678B2 - Keys and key manufacturing methods - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In the automotive parts industry, there is a need for all parts in this field to be inexpensive and lightweight.

This is particularly the case in the field of automotive locking devices (switches, anti-theft devices, key actuation caps, doors, bonnets).

It is therefore an object of the invention to provide a key that is lightweight, strong and inexpensive in terms of materials and construction.

A car lock key, like any other key, must be handled and operated (
engagement, rotation, and disengagement), the head is continuous with a flat stem and one or both edges of the stem are notched, and the depth and spacing between the notches is keyed. It is known to provide minimal protection against unusually non-lockable holes.

These conventional keys are made by stamping the head and making it plain from a strip of steel, and by machine-cutting grooves on two sides parallel to the axis of the key, a feature that distinguishes the keyhole opening of the lock. .

Teeth are then machined or cut to different depths.

The outer shape of the stem of the key is stamped, leaving the head of the key flat.

This approach presents difficult problems such as connecting the flat part to the stamped part.

The flat portion cannot resist torque, making such a key less suitable than a regular key.

Furthermore, in the case of ordinary keys where the outer shape is made by machine cutting (which is an expensive process), the outer shape is better than when the outer shape is made by stamping on the basis that the stamping surface does not harden the material and impair this feature. The strength of the keys is also weak.

In order to overcome the above-mentioned disadvantages of the known keys, it is an object of the present invention to provide an actuating part or stem for guiding into the lock, and a head for retention, the head and stem being in one piece, the key It is an object of the present invention to provide a type of key in which the keys are in two different generally planar parts, each extending into a head and a stem, these parts being articulated by at least one further surface.

In the embodiment, the plane of the portion is arcuate.

In a variant, these parts are parallel. Another object of the invention is to provide a method for connecting the above-mentioned keys and locks using these keys.

The invention will be better understood from the following detailed description taken in conjunction with the accompanying drawings.

1 and 2, the key according to the invention is constituted by two planar parts 1, 2, which are parallel to each other and perpendicular to the planar parts 1, 2. It is articulated by a surface part 3.

The planar portions 1, 2 extend over the entire length of the stem 4 and head 5 of the key.

The key described here can therefore be made in one press, simultaneously making the plain part of the key in plain metal and forming the head, stem and bent part of the key according to the desired shape.

If required, the notch 6 in the key stem can also be obtained during the pressing process by means of a special exchangeable tool attached to the main tool.

In the embodiment shown in FIGS. 3 to 5, the two flat portions 1/, 2/ of the key are inclined to each other, and the connecting surface 3' is curved.

The entire key with head 5', stem 4' and cutout 6' can be made in the same manner as described above.

The lock according to the invention adapted to receive any of the keys described above has a special construction with an entrance and an internal structure according to two different sides.

In addition to the advantages of lightness and cheapness of the key, the invention makes it possible to improve the inviolability of the lock due to the impossibility of applying tools to the lock.

The application of flexible strips or false keys precludes vertical actuation of the strip or false key to the lock.

[Brief explanation of the drawing]

FIG. 1 is an elevational view of a key according to a first embodiment of the invention, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is a second embodiment of the invention. A perspective view of the key according to the example, FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3, and FIG.
It is a sectional view taken along line v--■ in the figure. In the figure, 1, 2, 1', 2/... plane part, 3.3
'-...Connection part, 4,4'-...Stem, 5,5'...Head, 6,6<...Notch.

Claims (1)

[Scope of Claims] 1. A guide member (composed of an actuating part or stem and a retaining head, the head and stem being an integral piece, located on two different planar parts of the main body of the key), A key that extends into a head and a stem, respectively, and these parts are continuous by at least one other surface.2 A single press simultaneously cuts the continuous part of the key from the blank metal, and the cut part is cut on two different faces. It consists of a stem, which is an operating part that guides the key into the lock, and a head for holding, which are formed in two different planar parts of the main body of the key. A method of making a key which extends across the length of the key and whose parts are connected by at least one other surface.