JPH0227073A - Locking system for car - Google Patents

Abstract

PURPOSE:To prevent breakage of component members of a lock by making the key insert hole of a cylinder lock, whose unlocking by a sub-key is prohibited, in such a form as not to admit insertion of the sub-key. CONSTITUTION:A sub-key 1a is provided with a guide groove 5a with depth Da. The key insert hole 4 of No.1 rotor 3 of a cylinder lock, whose unlocking can be made by a master key but not by the sub-key 1a, is provided with a protrusion 6 having a protruding amount E greater than the depth Da. At an eventual try of inserting the sub-key 1a into the key insert hole 4, collision of the protrusion having great protruding amount E with the sub-key 1a does not permit insertion.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention includes a master key that can unlock a plurality of cylinder locks, and a subkey that can unlock only a specific cylinder lock among the cylinder locks. Regarding automobile lock systems.

[Conventional technology]

Automobiles are equipped with numerous cylinder locks to ensure safety against theft and the like. For example, in addition to the cylinder lock for the starter motor that starts the engine, the cylinder lock attached to the first door that opens and closes the vehicle body opening for getting on and off, the language door of the trunk room, the door of the glove box,
Alternatively, cylinder locks are also provided on back doors and the like.

These cylinder locks can be unlocked with a key held by the user of the vehicle. At that time, if all cylinder locks can be locked with one key, if the car and keys are left temporarily with a third party for some reason, even if the trunk or glove box is locked, unauthorized persons will be able to lock the cylinders. There is a risk that the door may be unlocked and the luggage inside may be tampered with.

Conventionally, keys have been divided into a master key and a subkey.The former master key can unlock all cylinder locks, but the latter subkey can unlock only specific cylinder locks, such as cylinder locks for starter motors and site 1. Only the first cylinder lock can be unlocked, and when handing over the key and car to a third party, hand over the sub-key, eliminating the possibility that the trunk or glove box containing valuables will be opened inadvertently. This is the automobile lock system described at the beginning.

[Problem to be solved by the invention]

In conventional locking systems, the master key and subkey differ from each other only in the shape of their tips, and this difference allows the master key to unlock all cylinder locks, and the subkey to unlock only a specific cylinder lock. It has become. However, if there is only such a difference in shape, it is possible to insert a subkey into the key insertion hole of a cylinder lock that is prohibited from unlocking, so it is possible for the user to mistakenly think that it is the master key. At the bottom, insert the subkey into the cylinder lock that cannot be unlocked by this,
You may try to force the key to turn. In such a case, excessive torsional force may be applied to the subkey, deforming it or damaging the tumbler of the cylinder lock or other lock components.

An object of the present invention is to provide a locking system for an automobile that can completely eliminate the problems of the prior art.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a lock system of the type described at the beginning, in which the sub-key and the shape of the key insertion hole of the cylinder lock, which is prohibited from being unlocked by the key, are
We propose a lock system characterized by being formed so that a sub-key cannot be inserted into the insertion hole.

[Effect]

The master key can be inserted into the key insertion hole of all cylinder locks and operated as before, but it is impossible to insert the subkey into the key insertion hole of a cylinder lock that is prohibited from unlocking. .

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1(a) and (b) are perspective views showing an example of a master key 1 and a subkey 1a of a lock system according to the present invention, and FIGS. 2(a) and (b) are cross-sectional views thereof. . These keys 1 and 1a have tumbler grooves 2 and 2a of the same shape that move the tumbler of the cylinder lock on their wide sides.
is formed.

Figure 3(a) is a front view of the rotor (hereinafter referred to as the 10th rotor) 3 of a cylinder lock attached to the door of a trunk room, glove box, etc. where valuables may be stored. Also, FIG. 3(b) shows a rotor (hereinafter referred to as the 20th rotor) 3a of a cylinder lock attached to a side door of an automobile or a cylinder lock for a starter motor.

Key insertion holes 4, 4 are provided in the first and twentieth terminals 3, 3a.
A is formed, and each cylinder lock can be locked or unlocked by inserting a key into these and turning the key as described later.

In FIGS. 1 and 2, guide grooves 5 and 5a extending in the longitudinal direction are formed on both narrow side surfaces of the master key 1 and the sub key 1a, respectively. At that time, as shown in Figure 2 (
As can be seen from a) and (1)), the depth D of the guide groove 5 of the master key 1 is the same as the depth D of the guide groove 5a of the sub key 1a.
It is formed deeper than the depth Da of .

On the other hand, the key insertion hole 4 of the first and twentieth keys 3, 3a
, 4a are formed with protrusions 6, 6a that protrude toward the center of each rotor, respectively, at the upper and lower portions in FIG. The protrusion amount E of the protrusion 6 of the tenth holder 3 is approximately equivalent to the guide groove depth D of the master key 1, or is formed slightly smaller than this. Further, the protrusion amount Ea of the protrusion 6a of the 20th key 3a is the guide groove depth Da of the sub key 1a.
It is approximately equivalent to or slightly smaller than this. That is, the guide groove 5 of the master key 1 has both protrusions 6.
, 6a, and the guide groove 5a of the sub key 1 is
Although it is possible to fit into the protrusion 6a, the protrusion 6 of the master key 1
D>D a, E>E a
It is set to .

As mentioned above, the guide groove 5 of the master key 1 is formed deeply, and the key insertion hole 4 of the first rotor 3 has a large protrusion 6 with a large protrusion amount E, and also has a small protrusion with a small protrusion amount Ea. Key insertion hole 4 of second rotor 3a having 6a
The master key 1 can also be inserted into the tumbler groove 2, and the tumbler in the cylinder lock can be moved by the tumbler groove 2, and the cylinder lock can be locked or unlocked by turning the key 1. . By using the master key in this manner, it is possible to unlock and lock all of the plurality of cylinder locks attached to the automobile.

On the other hand, the guide groove 5a of the sub-key 1a is formed shallowly, and the key la is inserted into the key insertion hole 4a of the 20th key 3a having a small protrusion 6a with a small protrusion amount Ea to unlock or unlock the cylinder lock. Although it can be locked, the subkey 1a cannot be inserted into the key insertion hole 4 of the tenth key 3, which has a protrusion 6 with a large protrusion amount E. Subkey 1a
Even if an attempt is made to insert the key 1a into the key insertion hole 4, the protrusion 6 having a large protrusion amount E hits the key 1a and prevents the key from being inserted.

As mentioned above, the user of the car can use the master key 1 to operate all cylinder locks, while the subkey 1a can only operate a specific cylinder lock. Even if you hand it over, there is no risk that your glove box or I-rank room containing valuables will be opened.

Furthermore, even if the user mistakenly tries to insert the subkey 1a into the key insertion hole 4 of the cylinder lock, which cannot be unlocked by this, it is impossible to insert the subkey 1a.
Do not apply excessive force to the subkey 1a itself, the tumbler inside the cylinder lock, or other components.
These deformations and damages can be prevented.

The same effect as described above can be obtained even if the sub-key 1a is not provided with any guide groove 5a, and the 20th key 3a is also not provided with any protrusion 6a.

In the embodiment shown in FIGS. 4(a) and 4(b), one guide groove 15 is formed on each upper and lower side surface of the master key 11, and two guide grooves 15 are formed on each upper and lower side surface of the sub key 11a. A groove 15a is formed.

On the other hand, Figure 5(a) shows the 10th cylinder lock attached to the door of a trunk room where valuables may be stored.
- The key insertion hole 1 formed in the data 13 is shown.
4 has one protrusion 16 protruding from its upper and lower parts. In addition, Fig. 5(b) shows the 20-ta 13 of the cylinder lock attached to the side door and the cylinder lock for the starter motor.
a and a key insertion hole 14 formed therein. a
Two protrusions 16a are provided at the upper and lower portions of.

The guide groove 15 of the master key 11 can not only fit into the protrusion 16 of the tenth key 13, but also fit into two adjacent protrusions 16a of the twentieth key 13a so as to straddle them. be able to. On the other hand, subkey 11a
The two mutually adjacent guide grooves 15a of
It does not fit into the third protrusion 16, but can fit into two mutually adjacent protrusions 16a of the 20th holder 13a.

Therefore, in this case as well, the master key 11 is
However, the sub key 11a cannot be inserted into the key insertion hole 14 of the 10th key 13 by inserting it into the key insertion hole 14, 148 of the 10th key 13a.

That is, even if the sub-key 11a is handed over to a third party, there is no risk that the sub-key 11a will be used to open valuables storage areas such as the trunk room or the glove box.

In this way, FIGS. 4(a), (b) and 5(a)
), (b) also provide the same advantages as the previous embodiments.

In the two embodiments described above, the guide 1 formed on the narrow side of the master key 1゜11 and the sub keys 1a and lla.
The purpose was achieved by changing the shapes of the grooves 5.5a and 15.15a, as shown in FIG. 6(a).

The master key 21 and subkey 21a shown in (b) are
Tumbler grooves 22, 22 formed on the wide side surface
The distances Wl and W2 between the narrowest parts of a are different from each other, and the former is wider than the latter.

On the other hand, as shown in Figures 7(a) and (b), cylinder locks 1 to 10 for the doors of rooms such as rooms 1 to 1 for storing valuables are shown.
The key insertion hole 24 formed in the cylinder lock for starter motors and the cylinder lock for cylinder locks for size 1 to 1 to Projections 26 and 26a are formed in the respective portions. Widths di, d of these protrusions 26, 26a
2, the former is formed larger, and the above-mentioned interval WL W
2 and the width di, d2 have a relationship of Wl>d 1>W2>d 2. Therefore, the master key 21 can be inserted into any of the key insertion holes 24, 24. The sub key 21a can also be inserted into the key insertion hole 24.a of the 20th key 23a, and the cylinder lock can be operated.
Although the cylinder lock can be operated by inserting it into the
- It cannot be inserted into the key insertion hole 24 of the key 23, and the same effect as in each of the above-mentioned embodiments can be obtained.

Although three typical embodiments have been described above, the same purpose can also be achieved by forming the subkey and the key insertion hole of the cylinder lock, which is prohibited from unlocking with the key, in other shapes. It is possible.

〔Effect of the invention〕

According to the present invention, a subkey cannot be inserted into a cylinder lock in which unlocking by a subkey is prohibited.
There is no risk of excessive force being applied to the key, the tumbler of the cylinder lock, or other components within the needle, and deformation or breakage thereof can be reliably prevented.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are perspective views showing the shapes of the front portions of the master key and subkey, and FIG. (b) is the ll-H line of FIGS. 1(a) and (b) and IIa
-II Cross-sectional view along line a, Figure 3 (a), (b)
Figures 4(a) and 4(b) are front views showing the rotor of the cylinder lock.
) is a cross-sectional view of a master key and subkey in another embodiment, FIGS. 5(a) and 5(b) are front views of each rotor in the same embodiment, and FIG. 6(a). 7(b) is a side view of a master key and a subkey in yet another embodiment, and FIGS. 7(a) and 7(b) are front views of each rotor on the actual flow side. 1.11.21... Master keys la, lla, 21a... Subkeys 4.1.4, 24.4a, 14a, 24a key insertion holes Figure 1 (a) Agent Patent attorney Norio Hoshino <b> Figure (o) Figure (a) (b) Figure Ca) Figure (a) Cb) Figure (cy) (b)

Claims (1)

[Scope of Claims] A locking system for an automobile comprising a master key that can unlock a plurality of cylinder locks, and a subkey that can unlock only a specific one of the cylinder locks, the subkey and the key A lock system characterized in that a key insertion hole of a cylinder lock which is prohibited from being unlocked by the cylinder lock is formed in such a manner that a sub-key cannot be inserted into the insertion hole.