JPS62182374A - Cylinder lock - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to cylinder locks.

Prior Art In this type of cylinder lock, as shown in Fig. 1, the tumbler (3) housed in the vertical groove (2) of the rotor (υ) is connected to the outer cylinder (5) side via the spring (4). In order to align the shear lines by inserting the key (8) into the square hole (7) at the center of the tumbler (3), the second
As shown in the figure, the key groove (
9), set the depth of the groove (9) to h as shown in the figure, for example.
l, h2. Three types of h3 were selected and the combinations were changed in various ways.

On the other hand, the rotor (υ) and the outer cylinder (5) are molded from zinc or resin, and due to their mold accuracy, molding conditions, etc., both 11) (
5) It is extremely difficult to form the sliding contact surface into a perfect circle.
In particular, with resin molding, there is a slight gap between the outer circumferential wall of the rotor (1) and the inner circumferential wall of the outer cylinder (5) due to the occurrence of sink marks due to changes over time. In the case of the bonding type, there is no choice but to expect a loss in explanation during that time.1 Normally the pitch of the keyway (9) is 0.5 to 0.8 ff1lI
is set, so if the gap between the rotor (17 and the outer cylinder (5) is 0.2 mm, the retention formula for that single tumbler (3) will be 3 to 0.6 mm. .

The problem that the invention aims to solve is that the tumbler (3) only has a small engagement groove (
6), if the key (8) is used illegally, for example, if an attempt is made to open the lock using the key (3), which differs only in the locking of the key @ (91 by number 1).

The engagement distance of that single tumbler (3) is only 0.3 to 0.
．． 61, it is easy to unlock, and in order to avoid this, it is necessary to avoid the most different combinations of keys, and there is an inconvenience that there will be fewer combinations.

Means for Solving the Problems The present invention aims to solve the above problems and increase the number of types of key combinations. In a cylinder lock that accommodates a tumbler and elastically engages the tumbler with an engagement groove on the outer cylinder side via a spring, the rotor K is fitted with a cylinder made of a metal plate, and the cylinder lock The present invention is characterized in that it includes a square hole that aligns with the engagement groove, and a locking piece that is bent from a side edge of the square hole and snaps onto the engagement groove.

Embodiment Below, an embodiment of the present invention will be explained with reference to FIGS. A cylindrical body aa2 made of a metal plate is fitted on the outer periphery, and the cylindrical body aa has a square hole Qυ that aligns with the engagement groove (6) and a square hole α〃 that is bent from the side edge and engaged. Matching groove (6) K locking piece (2)
and is provided.

As shown in FIG. 4aK, the cylinder aa is made by punching out a rectangular metal plate and having several notches lined up in the center and both side edges.

Furthermore, make cuts perpendicular to the center of the cut and bend the tips of the separation pieces separated by these cuts at right angles.
Next, as shown in Figure 4, the two sides of the metal plate are bent so as to be joined to form a cylindrical body.
At the same time, the bent piece at the tip of the separating piece (to) forms a locking piece (goods), and each separating piece (to) is bent inward to hold the rotor (1). I did it like that.

Thus, as shown in Figure 3, the rotor (1) and the outer cylinder (5)
1 Even if there is a gap E between the elastic metal cylinder 0
The separation piece 0 of q comes into close contact with the rotor (1), and the tip of the separation piece (to) is bent and the locking piece (2) is inserted into the engagement groove (6) of the outer cylinder.
If the tumbler (3) protrudes even slightly from the vertical groove (2) toward the engagement groove (6), it will abut against the locking piece (a) in the rotating direction. Its rotation is blocked.

In other words, the entire protrusion f#s from the rotor acts effectively. Furthermore, since the cylinder body is made of metal, even if the outer cylinder side is made of resin or zinc, the wall of the locking opening l groove will not be scratched by the tumbler.

Effects of the Invention As described above, according to the present invention, a cylinder body αQ made of a metal plate is fitted to the rotor (υ), and a square hole αη and a core inner hole αη that align with the engaging groove (61) are formed in the core body C1O. Since the locking piece (2) is bent from the side edge of the rotor and snaps into the engagement groove (6), there is no looseness between the rotor (1) and the outer cylinder (5). In addition, since the cylinder body 00 is made of metal, the wall of the locking groove θQ will not be scraped. )? Since the rotor (υ) is not rotated unnecessarily because it engages with the engagement groove (6) through the Moreover, the metal cylinder 00 can be easily machined into a perfect circle compared to molded products such as zinc or resin, so it can be closely attached to the internal rotor (1) and rotated by 1λ. This has the effect of smoothing the process.

[Brief explanation of drawings]

Figure 1 is a sectional view showing a conventional example, Figure 2 is a key and button/button 2.
FIG. 3 is a sectional view showing an embodiment of the present invention, and FIG. 4 is an explanatory view showing the state of processing of the cylinder. (1λ...Rotor (3)...Tumbler (4)
)...Spring (5)--Outer cylinder (6)...
Engagement groove QQ...Cylinder αη...Square hole @...Locking piece Patent applicant
2 people outside Honda Lock Co., Ltd.

Claims (1)

[Claims] A cylinder lock in which a plurality of tumblers are accommodated in a rotatable rotor housed in an outer cylinder, and the tumblers are elastically engaged with an engagement groove on the outer cylinder side via a spring, wherein the rotor A cylindrical body made of a metal plate is fitted into the cylindrical body, and the cylindrical body has a square hole that aligns with the engagement groove, and an engagement that is bent from the side edge of the square hole and snaps into the engagement groove. A cylinder lock characterized by being provided with a stopper.