JPH0223736Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cylinder lock, and more particularly to a cylinder lock that increases the number of different types of keys.

One way to increase the number of different types of keys in cylinder locks used in vehicles, etc. is to change the key ridges formed on the side edges of the keys and the key grooves cut into the pads of the keys. It is accomplished by That is, as shown in FIG. 1, by changing the cutting depth of the key threads 1b, 1b', etc. formed on the side edges 1a, 1a' of the key 1, and by changing the combination thereof, the number of different types of keys is increased. As shown in Fig. 2, the height h from the reference plane of key grooves 1d and 1d' formed by cutting in the longitudinal direction on the side surfaces (belts) 1c and 1c' of the key 1, respectively.
The number of different keys is increased by changing the number of keys.

However, when the height h of the keyways 1d and 1d' is changed, tumbler guide walls are formed integrally with the rotor of the cylinder lock at three locations: the entrance, the middle, and the back of the rotor, as shown in Figure 3. The key guide groove 2a drilled in the rotor 2 must be formed to match the key grooves 1d and 1d', and this requires a different type of rotor with a different key guide groove, which increases the cost. There is a problem.

The present invention was developed in view of the above points, and the purpose is to increase the number of different types of keys without changing the rotor. A cylinder lock in which a guide wall is provided, a key guide groove that matches the cross-sectional shape of the key is bored in the guide wall, and a rotor cap is fitted to one end and an operating rod is fitted to the other end, each end of the rotor. The fitting portions are formed in the same shape, and the rotor cap and the operating rod can be replaced and fitted, and by using one rotor with the front and back reversed, it is possible to use two rotors of different types. To provide a cylinder lock in which the types of keys can be increased in the same way as used cylinder locks.

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 4 shows a horizontal sectional view of a cylinder lock to which the present invention is applied.
1. A cylinder 12 is housed in the cylinder case 11, and a cylindrical rotor 13 is housed in the cylinder 12. A rotor cap 14 is attached to one end (front end) of the rotor 13, and a rotor cap 14 is attached to the other end (front end) of the rotor 13. The operating rods 15 are fitted to the rear end portions thereof as will be described later, and the case 11 is fitted to the shaft 15d of the operating rods 15.
A rotary switch 16 housed in the inner end is connected.

The rotor 13 has a cylindrical shape, as shown in FIG. A key guide groove 13b having the same cross-sectional shape as the sections 1c, 1c' is bored in the axial direction, and the end of the key guide groove 13b opens into a tumbler storage hole 13g, which will be described later. Furthermore, the end surface 13a
A substantially semicircular recess 13c is formed on one side of the key guide groove 13b in the longitudinal direction.

On the other end surface (rear end surface) 13d of the rotor 13, as shown in FIGS. 5 and 7, a key guide groove 13e is axially bored at a position corresponding to the front end surface 13a, and a recess 13f is formed. has been done. The end of this key guide groove 13e is located in the tumbler storage hole 1.
It opens at 3h. That is, the end surfaces 13a and 13d
The key guide grooves 13b and 13e provided in the recessed portion 13c and the recessed portion 13e have the same shape in the direction from the end surface 13a to the direction 13d, and are aligned on the same axis.
3f is provided symmetrically on the opposite side with respect to the longitudinal direction of the axis connecting the key guide grooves 13b and 13e.

Tumbler storage holes 13g and 13h are formed through the rotor 13 at predetermined axial positions at predetermined intervals in the diametrical direction, and a plurality of tumblers 20 enter and exit each of these holes 13g and 13h in the diametrical direction. It is currently stored. As shown in FIG. 8, the tumbler storage hole 13g houses a tumbler 20 having a key insertion hole 20a in the center and a spring 21 that applies a biasing force to the tumbler 20. The spring 21 presses the tumbler 20 upward in FIG. 8 during locking, and the tip of the tumbler 20 fits into a groove (not shown) of the cylinder 12 (FIG. 4). For example, two tumblers are stored in the tumbler storage hole 13g at a predetermined interval in the axial direction. The tumbler storage hole 13h is also formed in the same manner as the tumbler storage hole 13g, and three tumblers, for example, are stored in the tumbler storage hole 13h at predetermined intervals in the axial direction.

Two tumbler storage holes 13g and 1 of rotor 13
Partition wall (hereinafter referred to as guide wall) 13 between 3h and
As shown in FIG. 9, a key guide groove 13k is bored in i, which matches the key guide grooves 13b and 13e shown in FIGS. 6 and 7. That is, the rotor 13 has three key guide grooves 13b, 13k, and 13e formed at the entrance, middle, and back, respectively.

The rotor cap 14 has a disk shape with a larger diameter than the rotor 13, and a slit-shaped key insertion hole 14a is bored through the center in the diametrical direction, and the back surface 14b corresponds to the recess 13c of the end surface 13a of the rotor 13. A semicircular convex portion 14c that fits into the concave portion 13c is bored at the position. Further, the operating rod 15 has a disc shape having approximately the same diameter as the rotor cap 14, and has a concave portion 13f in the end surface 13d of the rotor 13 at one end surface 15a.
A convex portion 15b that fits into the concave portion 13f is protruded at a position corresponding to the concave portion 13f, and a shaft 15d is protruded from the axial position of the other end surface 15c. This axis 15d
The tip end 15e of the switch, for example, the hole 1 bored in the axis of the rotor 16a of the rotary switch 16.
6b.

Now, the end surface 14b of the rotor cap 14 is brought into contact with the end surface 13a of the rotor 13 shown in FIG.
The convex portion 14c is fitted. Further, the end surface 15a of the actuating rod 15 is brought into contact with the end surface 13d of the rotor 13,
The convex portion 15b of the actuating rod 15 is fitted into the concave portion 13f of the end surface 13d. In this manner, the rotor cap 14, rotor 13, and operating rod 15 are integrally connected, and as shown in FIG. 4, they are inserted into the case 11 and fixed by caulking. In this way, the key guide grooves 13b, 13k,
A cylinder lock 10 having 13f is configured. Further, connection terminals 16c and 16d of the switch 16 are respectively connected to predetermined electric circuits.

By the way, as shown in FIGS. 5 to 7, the recesses 13 provided on each end surface 13a and 13d of the rotor 13
c and 13f are located on opposite sides and are symmetrical. Therefore, the rotor 13 is rotated 180 degrees in a plane including its axial direction to interchange the front end surface 13a and the rear end surface 13d, that is, the front and back of the rotor 13 are interchanged. Next, the end surface 14b of the rotor cap 14 is brought into contact with the end surface 13d located on the front side of the rotor 13, and the convex portion 14c of the rotor cap 14 is fitted into the recess 13f of the end surface 13d, and the end surface 13a located on the rear side is brought into contact with the end surface 14b of the rotor cap 14. While touching the surface 15a of the actuating rod 15, the convex portion 15b of the actuating rod 15 is fitted into the recess 13c of the end surface 13a, and the same is housed in the case 11 shown in FIG. It is fixed to form a cylinder lock 10'.

Now, in the cylinder 10' constructed by swapping the front and rear of the rotor 13, the front end surface 13d, the rear end surface 13a, the tumbler storage hole 13g, and the guide wall 13i are shown in FIGS. 10, 11, 12, and 13, respectively. The result is as shown in FIG. Then number 10,
Each key guide groove 13e, 1 shown in FIGS. 11 and 13
3b and 13k are symmetrical with respect to each key guide groove 13b, 13e and 13k shown in FIGS. 6, 7 and 9. Therefore, the cylinder lock 10 assembled in the state shown in FIG. 5 and the cylinder lock 10' assembled with the rotor shown in FIG. 5 reversed as described above are different types. In this case, the arrangement of the tumblers 20 stored in the rotor 13 is as follows:
Make the array the same as the tumbler array.

As shown in FIG. 14, the key that matches this cylinder lock is the key 1 shown in FIG. 1 and key grooves 1d, 1.
The key 1' has a shape symmetrical to d'. That is,
It is sufficient to form a key symmetrical to key 1. Thus, the number of different types of keys can be doubled using the rotor 13 of the same shape.

As explained above, according to the present invention, a tumbler guide wall is provided in the cylindrical rotor, a key guide groove is bored in the guide wall that matches the cross-sectional shape of the key, and a rotor cap is provided at one end and the other end is provided with a tumbler guide wall. In the cylinder lock in which the actuating rod is fitted into the cylinder lock, the fitting portions formed at each end of the rotor are formed in the same shape so that the rotor cap and the actuating rod can be interchanged and fitted, By using one rotor with the front and back reversed, it is the same as using two rotors of different types, and the key type can be changed to 2.
Can be doubled. Also, in front of the rotor,
Since it is only necessary to form the fitting part at the rear end in the same shape, it is possible to reduce costs, and furthermore,
Ease of assembly can be improved simply by swapping the front and rear of the rotor.

[Brief explanation of drawings]

Figure 1 is a plan view of the key of the cylinder lock, Figure 2 is a sectional view along the arrow line in Figure 1, and Figure 3 is the guide wall of the tumbler with a key guide groove that matches the key in Figure 1. FIG. 4 is a horizontal sectional view showing an embodiment of the cylinder lock according to the present invention, FIG. 5 is an assembled perspective view of the rotor shown in FIG. 4, and FIGS. Each end view of the rotor, FIG. 8 is a sectional view along the arrow line in FIG. 4, FIG. 9 is a sectional view along the arrow line in FIG. 4, and FIGS. Each end view in the replaced state, 12th
13 and 13 are cross-sectional views taken along the arrow lines in FIG. 4 and 10, respectively, when the cylinder lock shown in FIG. 4 is assembled by swapping the front and rear of the rotor shown in FIG. 5. FIG. 3 is a cross-sectional view of a key that fits into the key guide groove shown in FIG. 1, 1'...Key, 10...Cylinder lock, 11
... Case, 12 ... Cylinder, 13 ... Rotor, 14 ... Rotor cap, 15 ... Operating rod,
16... rotary switch, 20... tumbler, 21... spring, 25... bolt.

Claims (1)

[Scope of utility model registration request] A tumbler guide wall is provided inside the cylindrical rotor,
A key guide groove that matches the cross-sectional shape of the key is bored in the guide wall, and a rotor cap is installed at one end.
In a cylinder lock in which an operating rod is fitted to the other end,
A cylinder lock characterized in that the fitting portions formed at each end of the rotor are formed in the same shape so that the rotor cap and the operating rod can be replaced and fitted.