JP2003106013A - Lock structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lock structure in which the breaking of an engaging section between a cylinder lock and a lock box by a slender plate or the like inserted into a key hole can be prevented. SOLUTION: In the lock structure in which an external cylinder 61 for the cylinder lock 31 in which an internal cylinder 41 can be rotated to the external cylinder 61 externally inserted to the internal cylinder 41 by an unlocking by inserting a duplicate key 63 into a key hole 43 for the internal cylinder 41 is fixed onto the lock box installed in a door, a rotary output plate 69 rotated at the same center as the rotary center CL1 of the internal cylinder 41 is projected from the rear end face 41a of the internal cylinder 41 and the rotary operating physical force of the internal cylinder 41 is input to the lock box by engaging the plate 69 with a rotary input member 71 for the lock box, a through-hole 73 is bored to the plate 69, and at least one protective plate 75 closing the rear-end opening of the key hole 43 opened to the rear end face 41a of the internal cylinder 41 is mounted in the through-hole 73.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock in which a rotary output plate is provided on a rear end surface of the inner cylinder so that the rotary output plate is engaged with a rotary input member of a lock box. The present invention relates to a lock structure for inputting a rotational operation force into a lock box.

[0002]

2. Description of the Related Art A cylinder lock is provided with an inner cylinder having a keyhole inside an outer cylinder, and a plurality of pins provided in the inner cylinder in the key insertion direction are fitted to the inner and outer cylinders according to the depth of the key groove. The inner cylinder is rotatable with respect to the outer cylinder by moving to a predetermined position in the diametrical direction. As a result, the locking / unlocking operation force is input to the locking mechanism in the lock box provided in the door, and the dead bolt of the locking mechanism is advanced / retreated from the mouth of the door to enable locking / unlocking of the door.

This cylinder lock 1 is, as shown in FIG.
It is accommodated inside the fixed barrel 3 via a spacer 5. The inner wall of the fixed cylinder 3 is provided with a groove 7 in the axial direction, and the groove 7 is fitted with a projection 9 projecting on the outer periphery of the cylinder lock 1 in the axial direction to restrict the rotation of the cylinder lock 1. . A peripheral groove 11 is provided on the inner periphery of the rear portion of the fixed cylinder 3.
A stop ring 13 is fitted in the stopper. Stop ring 13
Presses the rear end surface of the cylinder lock 1 via the ring-shaped liner 15 to prevent the cylinder lock 1 from moving rearward (to the right in FIG. 7).

The fixed cylinder 3 has its rear end inserted into a lock insertion hole 19 formed in the door surface 17a, and its base end is fixed to a lock box (not shown) provided in the door 17. Fixed cylinder 3 protruding from the door surface 17a
On the outer periphery of the cone-shaped decorative ring 21 with the tip side cut off
Is externally inserted so that the tip end portion is on the tip end side of the cylinder lock 1. A coil spring 23 is externally supported on the outer circumference of the fixed cylinder 3, and the coil spring 23 biases the decorative ring 21 by a biasing force, and the rear end of the coil spring 23 is brought into contact with the door surface 17a.

By adopting such a biasing structure of the decorative ring 21, even if the protruding length of the cylinder lock 1 from the door surface 17a is different, the rear end surface of the decorative ring 21 is always kept at the door surface 17a. It is possible to cover the lock insertion hole 19 by abutting against it, and it is possible to attach the same cylinder lock 1 to the doors 17 having different thicknesses.

A rotation output plate 25 is provided on the rear end surface of the cylinder lock 1.
The rotation output plate 25 rotates about the same center as the rotation center of the inner cylinder of the cylinder lock 1. On the other hand, the keyhole of the inner cylinder is eccentric with the center of rotation of the inner cylinder. In the cylinder lock 1, the rotation output plate 25 is engaged with a rotation input member of a lock box (not shown) to input the rotation operation force of the inner cylinder to the locking mechanism in the lock box. .

[0007]

However, in the above-described conventional lock structure, the keyhole is provided eccentrically with respect to the center of rotation of the inner cylinder, while the keyhole rotates about the same center as the center of rotation of the inner cylinder. The motion output plate is provided so as to project from the rear end surface of the inner cylinder, and the rotation output plate is engaged with the rotation input member of the lock box. For this reason, there is an engagement part between the cylinder lock and the lock box near the extension direction of the key insertion path (so-called keyway), and a thin plate or the like is inserted into the key hole to give an impact, or a drill is inserted into the key hole. By doing so, it may be possible to destroy the engaging portion between the cylinder lock and the lock box and directly operate the locking mechanism in the lock box.

The present invention has been made in view of the above circumstances, and a first object thereof is to obtain a lock structure capable of preventing breakage of an engaging portion between a cylinder lock and a lock box by a thin plate or the like inserted in a keyhole. Especially. A second object is to obtain a lock structure that can prevent various forms of breakage using a keyhole. Further, a third object is to obtain a lock structure capable of preventing both the drilling breakage using a keyhole drill and the impact breakage that strikes a thin plate or the like.

[0009]

[Means for Solving the Problems] Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. In the lock structure according to claim 1 of the present invention, the inner cylinder 41 is inserted into the key hole 43 opening at the front end surface of the inner cylinder 41 to unlock the inner cylinder 41 from the outer cylinder 61 externally inserted into the inner cylinder 41. The outer cylinder 61 of the cylinder lock 31 that allows the rotation of 41 is fixed to a lock box provided in the door, and the key hole 43 is arranged eccentrically with the rotation center CL1 of the inner cylinder 41. On the rear end surface 41a of the inner cylinder 41, the center of rotation CL1 of the inner cylinder 41 is
A rotation output plate 69 that rotates about the same center as that of the lock box is projected, and the rotation output plate 69 is engaged with the rotation input member 71 of the lock box, whereby the rotation operation force of the inner cylinder 41 is changed. In the lock structure for inputting into the lock box, at least one through hole 73 is formed in the rotation output plate 69, and the through hole 73 closes the rear end opening of the key hole 43 opened at the rear end surface 41a of the inner cylinder 41. It is characterized in that a single protective plate 75 is attached.

In this lock structure, a protective plate 75 for closing the rear end opening of the key hole 43 opened in the rear end surface 41a of the inner cylinder 41 is attached to the through hole 73 formed in the rotation output plate 69, whereby the key hole 43 is formed. It is possible to prevent the thin plate or the like inserted in the above from protruding from the rear end surface 41a of the inner cylinder 41. This allows the keyhole 43
It is possible to prevent the engagement part between the cylinder lock 31 and the lock box from being broken by the tip of a thin plate or the like inserted into the lock box, release the engagement between the cylinder lock 31 and the lock box, and directly lock the lock mechanism inside the lock box. It is possible to prevent unauthorized unlocking by operating the dead bolt backward.

In the lock structure according to claim 2, the through hole 73 is provided.
In addition, a plurality of the protection plates 75 made of different materials are attached.

In this lock structure, since the protective plate 75 made of a different material is attached to the through hole 73, the optimal protective plate 75 is provided to prevent various damages such as insertion impact of a thin plate or insertion of a drill. It can be mounted appropriately to exert a cumulative destruction resistance effect. This makes it possible to protect the rotation input member 71, the lock box, etc. from a plurality of different destruction methods.

In the lock structure according to claim 3, the protective plate 75a made of a hardened iron plate is arranged on the inner cylinder 41 side, and the protective plate 75b made of a stainless steel plate is arranged on the lock box side and mounted in the through hole 73. It is characterized by having done.

In this lock structure, a protective plate 75a made of a hardened iron plate is attached to the inner cylinder 41 side of the through hole 73, and a protective plate 75 made of a stainless steel plate is attached to the lock box side of the through hole 73.
By mounting b, it is possible to enhance the cutting resistance with the quenched iron plate and the impact resistance with the stainless steel plate. That is, the hardened iron plate prevents puncture damage, and the stainless steel plate behind the hardened iron plate cooperates with the hardened iron plate to prevent impact damage, and both puncture damage and impact damage can be prevented.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a lock structure according to the present invention will be described in detail below with reference to the drawings. 1 is a vertical sectional view of the lock structure according to the present invention, FIG. 2 is a horizontal sectional view of the lock structure shown in FIG. 1, FIG. 3 is a front view of the lock structure shown in FIG. 1, and FIG. 4 is shown in FIG. 5 is a rear view of the lock structure, FIG. 5 is a plan view of the key used in the lock structure shown in FIG. 1, and FIG. 6 is an exploded perspective view of the rear end portion of the inner cylinder. It should be noted that FIG. 1 shows the position of the decorative ring when the cylinder lock is attached to the doors of different thicknesses at the upper part and the lower part with the axis as a boundary.

The cylinder lock 31 is housed inside the fixed barrel 33. A spacer 35 and a spacer cover 37 are externally inserted on the outer periphery of the fixed cylinder 33. On the front end surface of the cylinder lock 31, a ring-shaped front plate 39 is fixedly fitted on the outer periphery of the spacer cover 37, and the front plate 39 has the key hole 43 of the inner cylinder 41 exposed from the hole at the center. There is. A peripheral groove 45 is provided on the inner periphery of the rear portion of the fixed cylinder 33, and a stop ring 47 is fitted in the peripheral groove 45. The stop ring 47 presses the rear end member 50 of the cylinder lock 31 and prevents the cylinder lock 31 from moving rearward (rightward in FIG. 1).

The rear portion of the fixed cylinder 33 is inserted into a lock insertion hole formed in the door surface (not shown), and the base end 33a is fixed to a lock box (not shown) provided in the door. Fixed cylinder 33 protruding from the door surface
A cosmetic ring 51 having a substantially conical shape having an open front end is externally fitted to the outer periphery of the cylinder lock 31 so that the front end thereof is the front end of the cylinder lock 31. The decorative ring 51 has an inner wall portion 53 whose front end portion is bent inward. The front end of the inner periphery of the decorative ring 51 is externally fitted to the outer periphery of the front plate 39, and the bent end 53a of the inner wall portion 53 is externally fitted to the outer periphery of the cylinder lock 31, that is, the outer periphery of the spacer cover 37. As a result, the decorative ring 51 can be slightly moved in the axial direction of the cylinder lock 31.

A coil spring 55 is fitted around the outer circumference of the spacer cover 37. The coil spring 55 has one end in contact with the rear end surface of the front plate 39 and the other end in contact with the bent end 53 a of the decorative ring 51. Therefore, the decorative ring 51 has its rear end portion brought into contact with the door surface by the biasing force of the coil spring 55 externally supported by the cylinder lock 31. Accordingly, the decorative ring 51 can always contact the rear end surface with the door surface even when the protruding lengths of the cylinder lock 31 from the door surface are different, and the same cylinder lock 31 for doors having different thicknesses can be provided. It can be installed.

As shown in FIG. 2, the cylinder lock 31 integrally fixes the fixed cylinder 33 and the spacer 35 by a pair of fixed shafts 57 penetrating the fixed cylinder 33 and the spacer 35 in the radial direction. A ring member 59 is fitted on the outer periphery of the spacer cover 37. Ring member 59
Can be fitted by caulking or the like. The outer circumference of the ring member 59 is in contact with the inner circumference of the decorative ring 51 to prevent the decorative ring 51 from being deformed inward in the radial direction.

The cylinder lock 31 has an outer cylinder 61 fitted outside the inner cylinder 41. The cylinder lock 31 has a plurality of pin tumblers (not shown) arranged between the outer cylinder 61 and the inner cylinder 41 in the key insertion direction. Key 63 shown in FIG.
Has a plurality of recesses 65, and by being inserted into the keyhole 43, the recesses 65 move the pin tumbler to predetermined positions in the diameter direction of the inner and outer cylinders, and the shear lines are moved to the outer cylinder 61 and the inner cylinder 4.
By matching the boundary with 1, the rotation restriction of the outer cylinder 61 and the inner cylinder 41 by the pin tumbler is released.

Further, the key 63 is provided with a plurality of magnet pieces 67 in the inserting direction. The magnet piece 67 moves a plurality of magnetic tumblers (not shown) provided in the cylinder lock 31 in the diameter direction of the inner and outer cylinders by magnetic force, and releases the rotation restriction of the outer cylinder 61 and the inner cylinder 41. Therefore, by inserting the key 63 into the key hole 43, the restriction by the pin tumbler and the magnetic tumbler is released, and the inner cylinder 41 and the key 63 together with the outer cylinder 6 are released.
It becomes possible to rotate with respect to 1.

As shown in FIGS. 1 and 3, the cylinder lock 31 has a rotation center CL1 of the inner cylinder 41 and a central axis C of the key hole 43.
It is eccentric with L2. Therefore, the key 63 inserted in the key hole 43 rotates around the rotation center CL1 of the inner cylinder 41. As shown in FIG. 6, on the rear end surface 41a of the inner cylinder 41, a rotation output plate (so-called tail piece) that is integrally fixed to the inner cylinder 41 and rotates about the same center as the rotation center of the inner cylinder 41. 69 is projected. Since the keyhole 43 is eccentric to the center of rotation of the inner cylinder 41, the keyhole 43 is opened at the rear end surface 41a at a position displaced from the rotation output plate 69.

As shown in FIGS. 1 and 2, a rotation input member (so-called dharma) 71 of the lock box is opposed to the rear end surface 41a of the cylinder lock 31. The rotation input member 71 in the present embodiment projects in a cylindrical shape and enters the fixed cylinder 33 through the rear end opening of the fixed cylinder 33. A rectangular hole (not shown) is bored in the end surface of the rotation input member 71, and the rotation input member 71 is fitted with the rotation output plate 69 so as to face the rotation output plate 69. It is non-rotatably engaged. As a result, the locking / unlocking operation force is input to the locking mechanism of the lock box (not shown) provided in the door, and the dead bolt is advanced and retracted from the mouth of the door to enable locking / unlocking.

The rotation output plate 69 has a rectangular through hole 73 which is long in the diameter direction of the inner cylinder 41 at the center of the base end in the protruding direction.
Has been drilled. At least one protective plate 75 that covers the rear end opening of the key hole 43 that opens to the rear end surface 41 a of the inner cylinder 41 is attached to the through hole 73. The protective plate 75 has a substantially mushroom shape including a semi-circular head portion 77 and an insertion portion 79 protruding from the center of the diameter side portion of the head portion 77. Therefore, in the protective plate 75, by inserting the insertion portion 79 into the through hole 73, as shown in FIG. The keyhole 43 can be covered by.

The protective plate 75 is housed inside the housing member 81 shown in FIGS. 1 and 2 which is inserted from the lock box side so as not to fall off from the through hole 73. Housing member 81
Is engaged with the hole formed in the rear end member 50 described above, and is sandwiched and held by the rear end surface 41 a of the inner cylinder 41 and the rotation input member 71.

It is preferable to mount a plurality of protective plates 75 made of different materials. Protective plate 75 made of different materials
By installing the protective plate 75, which is suitable for preventing the destruction of various forms using the keyhole 43, such as the insertion impact of a thin plate or the insertion of a drill, it is possible to appropriately overlap. This makes it possible to protect the rotation input member 71, the lock box, etc. from a plurality of different destruction methods.

In the present embodiment, as shown in FIG. 6, a protective plate 75a made of a hardened iron plate is arranged on the inner cylinder 41 side, and a protective plate 75b made of a stainless steel plate is arranged on the lock box side in the through hole 73. I am wearing it. In this way, the protective plate 75a
By sequentially mounting the protective plate 75b and the protective plate 75b from the opening of the key hole 43 of the rear end surface 41a, it is possible to enhance the cutting resistance by the quenched iron plate and the impact resistance by the stainless steel plate.

In other words, in this structure, the protective plate 75a made of a hardened iron plate prevents puncturing and destruction, and the protective plate 75b made of a stainless steel plate behind the protective plate 75a cooperates with the protective plate 75b made of a hardened iron plate to make impact damage. It is possible to prevent both drilling and impact damage.

According to the lock structure thus constructed, the protective plates 75a and 75b for closing the key hole 43 opening in the rear end face 41a of the inner cylinder 41 in the through hole 73 formed in the rotary output plate 69. It is possible to prevent the thin plate, the drill or the like inserted in the key hole 43 from protruding from the rear end surface 41a of the inner cylinder 41 by mounting the. As a result, it is possible to prevent the engagement portion between the cylinder lock 31 and the lock box from being broken by a thin plate or a drill inserted in the key hole 43, releasing the engagement between the cylinder lock 31 and the lock box, and It is possible to prevent unauthorized unlocking, such as by directly operating the locking mechanism of (1) and retracting the dead bolt.

In the above embodiment, the case where the two protection plates 75a and 75b are mounted on the rotation output plate 69 has been described as an example, but the lock structure according to the present invention is one. Even if a protective plate or two or more protective plates are attached, the above-mentioned basic effects of the present invention are exhibited, and the material of the protective plate is a material resistant to impact and cutting. If so, it may be made of another material.

[0031]

As described above, according to the lock structure of the present invention, the rotation output plate is provided on the rear end surface of the inner cylinder so that the rotation output plate is engaged with the rotation input member of the lock box. In the lock structure in which the rotation operation force of the inner cylinder is input to the lock box by fitting, a through hole is formed in the rotation output plate, and a rear end opening of the key hole that opens on the rear end surface of the inner cylinder. Since a protective plate for closing the lock is installed, it is possible to prevent the engagement part between the cylinder lock and the lock box from being broken by the tip of a thin plate or the like inserted into the key hole, and release the engagement between the cylinder lock and the lock box. It is possible to prevent unauthorized unlocking in which the dead bolt is retracted by directly operating the locking mechanism in the lock box. As a result, the security of the cylinder lock can be improved.

Further, according to the lock structure of the present invention, since a plurality of protective plates made of different materials are attached to the through holes, it is the most suitable protection for preventing the destruction of various forms using the keyhole. The plates can be appropriately overlapped, and the rotation input member, the lock box, etc. can be protected against a plurality of different breaking methods.

Further, according to the lock structure of the present invention, since the protective plate made of a hardened iron plate is arranged on the inner cylinder side and the protective plate made of a stainless steel plate is arranged on the lock box side and mounted in the through hole, Cutting resistance can be enhanced by the insert iron plate and impact resistance can be enhanced by the stainless steel plate, which prevents both drilling damage by the drill tip inserted in the key hole and impact damage hitting a thin plate inserted in the key hole. can do.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a lock structure according to the present invention.

FIG. 2 is a horizontal sectional view of the lock structure shown in FIG.

3 is a front view of the lock structure shown in FIG. 1. FIG.

4 is a rear view of the lock structure shown in FIG. 1. FIG.

5 is a plan view of a key used in the lock structure shown in FIG. 1. FIG.

FIG. 6 is an exploded perspective view of a rear end portion of the inner cylinder.

FIG. 7 is a vertical sectional view showing a conventional lock structure.

[Explanation of symbols] 31 ... Cylinder lock 41 ... Inner cylinder 41a ... Rear end surface of inner cylinder 43 ... Keyhole 61 ... Outer cylinder 63 ... key 69 ... Rotation output plate 71 ... Rotation input member 73 ... through hole 75 ... Protective plate 75a ... Protection plate (protection plate made of iron) 75b ... Protective plate (stainless steel protective plate) CL1 ... Center of rotation of inner cylinder

Claims (3)

[Claims] 1. An outer cylinder of a cylinder lock, wherein a lock key is inserted into a keyhole opened at a front end surface of the inner cylinder to unlock the inner cylinder with respect to an outer cylinder externally inserted in the inner cylinder. Is fixed to a lock box provided in the door, and the keyhole is disposed eccentrically with respect to the center of rotation of the inner cylinder, and the rear end surface of the inner cylinder has the same center as the center of rotation of the inner cylinder. A lock structure for projecting a rotation output plate that rotates with the rotation input plate and engaging the rotation output plate with the rotation input member of the lock box to input the rotation operation force of the inner cylinder into the lock box. In the above-mentioned, the lock is characterized in that a through hole is formed in the rotation output plate, and at least one protective plate for closing the rear end opening of the key hole opened on the rear end surface of the inner cylinder is attached to the through hole. Construction. 2. The lock structure according to claim 1, wherein a plurality of the protective plates made of different materials are attached to the through hole. 3. The protective plate made of a hardened iron plate is arranged on the inner cylinder side, and the protective plate made of a stainless steel plate is arranged on the lock box side and mounted in the through hole.
The described lock structure.