JP3361746B2 - Cylinder lock - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cylinder lock.

[0002]

2. Description of the Related Art A cylinder lock includes a hollow cylindrical outer cylinder, a cylindrical inner cylinder mounted inside the outer cylinder, and a cylindrical cylinder mounted inside the outer cylinder and in front of the inner cylinder. Some of them are composed of latches.
A large number of holes are arranged in these inner and outer cylinders in a direction that intersects with the axial direction of the cylinder, and a compression spring is loaded in the holes of the outer cylinder. A large number of drivers that straddle each of the holes of the cylinder and a large number of pins that fit in the holes of the inner cylinder are mounted facing each other. The driver straddles the inner and outer cylinders to prevent the inner cylinder from rotating. When the key is inserted into the inner cylinder, the key mold formed on the key presses the pin, moving the abutting part between the driver and the pin to the sliding surface between the outer cylinder and the inner cylinder, and the entire driver is removed. It fits in the bore of the cylinder.

In this state, the engagement between the outer cylinder and the inner cylinder is released, and the inner cylinder can be rotated in both forward and reverse directions. A cam surface is formed on the front end of the inner cylinder, and the latch interlocks with the rotation of the inner cylinder.
The front end of the latch advances and retracts between the inside and the outside of the outer cylinder. The key type of the key differs depending on the individual cylinder lock.

[0004]

Conventionally, in order to prevent theft and the like, many complicated mechanisms for making it difficult to unlock the key have been proposed. However, the complicated mechanism may increase the production cost of the key and cause a failure.

An object of the present invention is to provide a cylinder lock which has a relatively simple structure and which is difficult to unlock.

[0006]

In order to solve the above-mentioned problems, the present invention is based on the premise that a hollow cylindrical outer cylinder having front and rear ends and the outer cylinder are engaged with each other. An inner cylinder that is mounted near the rear end of the outer cylinder and is capable of rotating in both forward and reverse directions by sliding contact with the inner peripheral surface of the outer cylinder when the engagement with the outer cylinder is released; A latch that is mounted near the front end of the inside and that can move forward and backward in the axial direction of the outer cylinder in conjunction with the rotation of the inner cylinder, and a key that can be inserted into and removed from the inner cylinder along the axial direction of the outer cylinder. When the key is inserted into the inner cylinder, the key mold formed on the key releases the engagement between the outer cylinder and the inner cylinder, thereby reversing the inner cylinder. It is a cylinder lock that rotates in both directions.

Under such a premise, a feature of the present invention is that the inner cylinder and the latch are slidably contacted with the inner peripheral surface of the outer cylinder in the forward and reverse directions coaxially with the inner cylinder. rotatable cam member is interposed, the La
The outer peripheral surface of the switch is formed with a groove extending in the axial direction.
The inner peripheral surface of the outer cylinder intersects the axial direction.
In the radial direction to enter the groove and rotate the latch.
While preventing it, the forward and backward movement of the latch in the axial direction is prevented.
A guide follower is formed, and in the latch, a cam follower formed at a rear end of the latch is pressed against a cam surface formed at a front end of the cam member under the bias of a spring in the axial direction, so that the latch is engaged with the key. Has a second insertion portion that engages with a rear end portion of the cam member to rotate the cam member at a front end of a first insertion portion that rotates the inner cylinder, and has a rear end portion of the cam member. the engaging portion is formed with respect to the second insertion part of the key, the second insertion portion is inserted into the engagement portion, when the Ru rotate the cam member to one of opposite directions, The cam surface presses the cam follower, and the latch rotates.
The cam surface and the cam follower are configured so as to be able to move forward against the bias of the spring without doing so.

As an example of an embodiment of the present invention, a cam surface of the cam member and an abutting surface of the cam follower press-contacting the cam surface are inclined in a direction intersecting the axial direction. .

In this embodiment, the spring for pressing the cam follower axially rearward is mounted between the front end of the outer cylinder and the rear end of the latch.

As another example of the embodiment of the present invention,
The second inserting portion of the key is an engaging protrusion extending forward from the front end of the first inserting portion in the inserting direction of the key, and the engaging portion formed at the rear end of the cam member is the engaging portion. It is a recess into which the mating protrusion enters.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The cylinder lock according to the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 and 2 are perspective views of a cylinder lock 1 attached to a fixed frame 17 for fixing one side of a door to be opened and closed, which is shown by an imaginary line so as to penetrate from the outside to the inside, and an outer cylinder 2. It is an internal side view of the cylinder lock 1 cut and shown. The cylinder lock 1 includes a hollow cylindrical outer cylinder 2 having a front end located inside the fixed frame 17 and a rear end located outside the fixed frame 17, an inner cylinder 3, a cam member 4, and a latch 5. And the key 11.

The outer cylinder 2 has a thread 6 formed around the outer peripheral edge of the rear portion thereof, and a cap 8 is mounted by screwing a set screw 9 on the front end portion thereof. Inside the outer cylinder 2, an inner cylinder 3, a cam member 4, and a latch 5 are mounted in the axial direction of the outer cylinder 2. A nut 7 for attaching the cylinder lock 1 to the fixed frame 17 is screwed onto the thread 6 of the outer cylinder 2. The cylinder lock 1 includes a flange portion 16 and a nut 7 formed on a peripheral edge of a rear end of the outer cylinder 2.
The fixing frame 17 is attached so as to be sandwiched by. A through hole is formed in the center of the cap 8 so that the front end 5c of the latch 5 can be moved forward and backward between the inside and outside of the outer cylinder 2.

The inner cylinder 3 is attached to the rear end portion of the outer cylinder 2 under engagement with the outer cylinder 2, and when the engagement with the outer cylinder 2 is released, the inner cylinder 3 is oriented in the circumferential direction of the outer cylinder 2. It can be rotated both forward and backward. The outer peripheral surface of the inner cylinder 3 is in sliding contact with the inner peripheral surface of the outer cylinder 2.

The cam member 4 is mounted in front of the inner cylinder 3 and coaxially with the inner cylinder 3, and is rotatable in both forward and reverse directions with respect to the circumferential direction of the outer cylinder 2. At the front end of the cam member 4, a cam surface 4a that is inclined in a direction intersecting the axial direction of the outer cylinder 2 is formed. The rear end of the cam member 4 comes into contact with the front end of the inner cylinder 3,
The outer peripheral surface of is in sliding contact with the inner peripheral surface of the outer cylinder 2.

The latch 5 is located in front of the cam member 4 and
It is mounted coaxially with the inner cylinder 3 and the cam member 4, and can move forward and backward in the axial direction of the outer cylinder 2. A cam follower 5a is formed at the rear end of the latch 5 to follow the rotation of the cam member 4 to move the latch 5 forward and backward in the axial direction. A coil spring 10 for pressing the latch 5 axially rearward of the outer cylinder 2 is attached to the outer peripheral surface of the latch 5. Both ends of the coil spring 10 are in contact with the rear end of the latch 5 and the inner surface of the cap 8 located at the front end of the outer cylinder 2, respectively.

At the rear end of the cam follower 5a, a contact surface 5b is formed which is inclined in a direction intersecting the axial direction of the outer cylinder 2. The contact surface 5b of the cam follower 5a is in pressure contact with the cam surface 4a of the cam member 4, and the outer peripheral surface of the cam follower 5a is in sliding contact with the inner peripheral surface of the outer cylinder 2.

FIG. 3 is a side view of the key 11 to be inserted into the cylinder lock 1. The key 11 has a handle 11a for gripping and rotating the key 11 in both forward and reverse directions, a first insertion portion 11b extending from the front end of the handle 11a in the insertion direction of the key 11, and a first insertion portion 11b.
The second extending in the insertion direction of the key 11 from the front end of the insertion portion 11b
It is composed of an insertion portion 11d. The second insertion portion 11d is an engagement protrusion 11d extending in the insertion direction of the key 11.

The key pattern of the key 11 is formed by a plurality of recessed portions 11c formed in the side surface of the first insertion portion 11b and an engagement protrusion 11d. The recesses 11c have different depths, and the key shape can be changed depending on how to combine the recesses 11c. Further, the key mold can be changed by changing the shape and size of the engaging protrusion 11d.

4 and 5 are sectional views taken along the line AA of FIG. 1 with the key 11 inserted. In FIG. 5, the key 11 causes the inner cylinder 3 and the cam member 4 to move along the line XX '. It shows a state of being rotated 180 ° in either direction. Inside the inner cylinder 3, a key insertion portion 3a into which the first insertion portion 11b of the key 11 enters is formed. A key 11 is provided at the rear end of the cam member 4.
The recess 14 into which the engaging projection 11d enters is formed.
In the concave portion 14, the engaging protrusion 11d does not idle inside,
The size is such that the engaging protrusion 11d can be fitted therein.

The outer cylinder 2 is provided with a pin 12 for preventing the latch 5 from rotating and for restricting the forward / backward movement distance of the latch 5 in the axial direction from the outer peripheral surface of the outer cylinder 2 in the radial direction orthogonal to the axial direction. It is loaded in the through hole 15 extending to the. On the outer peripheral surface of the latch 5, a groove 13 into which the pin 12 enters extends axially forward and backward.

In FIG. 4, the key 1 inserted in the cylinder lock 1
The first insertion portion 11b of No. 1 is the key insertion portion 3a of the inner cylinder 3.
The engaging projection 11d of the key 11 penetrates the key insertion portion 3a and is located in the recess 14 of the cam member 4. The latch 5 is pressed by the coil spring 10, and the cam surface 4a of the cam member 4 and the contact surface 5b of the cam follower 5a are in intimate contact with each other, and the regulating pin 12 contacts the latch 5 in front of the groove 13. Abutting. In the state of FIG. 4, the key 1
When 1 is rotated 180 ° in either XX ′ direction, the first insertion portion 11b of the key 11 rotates the inner cylinder 3 180 °, and the engagement protrusion 11d of the key 11 moves the cam member 4 180 °.
Rotate.

When the cam member 4 rotates 180 °, the inclination of the cam surface 4a becomes upside down. However, the cam follower 5a
Is prevented from rotating by the pin 12, the inclination of the contact surface 5b is maintained as it is. The rotation of the cam surface 4a of the cam member 4 acts so as to separate the cam follower 5a from the cam member 4 forward. As a result, the latch 5 advances in the axial direction of the outer cylinder 2.

In FIG. 5, the latch 5 pressed by the cam member 4 moves in the Y direction against the bias of the coil spring 10. The cam surface 4a of the cam member 4 and the cam follower 5
The abutment surface 5b of a is in a state of partial pressure contact, and the pin 12 is located at the rear portion of the groove 13. The front end portion 5c of the latch 5 advances in the Y direction from the through hole of the cap 8 and enters a key hole formed in a door (not shown) to be locked. When the key 11 is pulled out, the locked state is maintained. Since the latch 5 is pressed axially rearward of the outer cylinder 2 by the coil spring 10, when the key 11 is rotated 180 ° in the XX ′ direction again from the state of FIG. 5,
The latch 5 retracts in the Y'direction and returns to the state of FIG.

Although not shown, the key pattern of the key 11 presses each of the pins mounted in the holes of the inner cylinder 3,
The contact portion between the driver and the pin, which straddles the hole of the outer cylinder 2 and the hole of the inner cylinder 3, moves to the sliding surface of the outer cylinder 2 and the inner cylinder 3. The driver is the outer cylinder 2
The outer cylinder 2 and the inner cylinder 3 are unlocked from each other. In order to rotate the cam member 4 with the key 11, it is necessary that the engagement protrusion 11d of the key 11 and the recess 14 of the cam member 4 be in an engaged state. Even if the key 11 having no engaging protrusion 11d is used, the lock of the key 11 cannot be unlocked.

In order to prevent the rotation of the latch 5, a slit extending axially forward and backward is formed on the outer peripheral surface of the outer cylinder 2, and a pin 12 extending in the radial direction orthogonal to the axial direction is formed on the outer peripheral surface of the latch 5. Alternatively, the pin 12 may be formed and the pin 12 may be inserted into the slit.

[0027]

According to the cylinder lock of the present invention, the lock can be unlocked only by rotating both the inner cylinder and the cam member, so that the lock can be unlocked by rotating only the inner cylinder. It is more difficult to unlock than a cylinder lock. Since the structure is simple in which the cam member is mounted between the inner cylinder and the latch, the key can be manufactured at low cost, and the cause of failure can be reduced as compared with a cylinder lock having a complicated mechanism.

[Brief description of drawings]

FIG. 1 is a perspective view of a cylinder lock.

FIG. 2 is a side view of the inside of the cylinder lock, showing the outer cylinder cut away.

FIG. 3 is a side view of the key.

FIG. 4 is a cross-sectional view taken along the line AA of FIG. 1 with a key inserted.

FIG. 5 is a view of A- in FIG. 1 in a state in which the key is rotated 180 °.
A line sectional view.

[Explanation of symbols]

1 cylinder lock 2 Outer cylinder 3 inner cylinder 4 Cam member 4a Cam surface 5 latch 5a Cam follower 5b Contact surface 10 Coil spring (spring) 11 keys 11b First insertion part 11c key type 11d Engagement protrusion (second insertion part) 12 pins (protruding part) 13 groove 14 Recessed part (engagement part)

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E05B 27/10 E05B 55/00 E05B 63/08

Claims (4)

(57) [Claims] 1. A hollow cylindrical outer cylinder having front and rear ends, and the outer cylinder is mounted near the rear end of the outer cylinder under engagement with the outer cylinder to release the engagement with the outer cylinder. Sometimes, the inner cylinder is slidably in contact with the inner peripheral surface of the outer cylinder and can be rotated in both forward and reverse directions, and the inner cylinder is mounted near the front end of the outer cylinder and interlocked with the rotation of the inner cylinder. A latch capable of advancing and retracting in the axial direction and a key capable of being inserted into and removed from the inner cylinder along the axial direction of the outer cylinder are provided, and when the key is inserted into the inner cylinder, the key is attached to the key. A cylinder lock for releasing the engagement between the outer cylinder and the inner cylinder by a formed key mold to rotate the inner cylinder in both forward and reverse directions, wherein a space between the inner cylinder and the latch is provided. , Sliding contact with the inner surface of the outer cylinder Said cylinder coaxially with the rotatable cam member interposed into forward and reverse directions Te, the outer periphery of the latch
A groove is formed on the surface and extends in the axial front-rear direction.
The inner peripheral surface of the binder extends in the radial direction intersecting the axial direction.
And enter the groove to prevent rotation of the latch.
On the other hand, a protrusion that guides the forward and backward movement of the latch in the axial direction.
A protrusion is formed, and the latch has a cam follower formed at a rear end thereof in pressure contact with a cam surface formed at a front end of the cam member under the bias of a spring in the axial direction. A second insertion portion that engages with a rear end portion of the cam member to rotate the cam member is formed at a front end of a first insertion portion that rotates the inner cylinder, and a rear end portion of the cam member is formed at a rear end portion of the cam member. , the engaging portion is formed with respect to the second insertion part of the key, before
The serial second insertion portion is inserted into the engagement portion, when the Ru is rotated to either of the cam member <br/> forward and reverse directions, wherein the cam surface presses the cam follower, the latch times Don't move
Ku cylinder lock and the cam follower and the cam surface to allow advance against the biasing said spring is characterized by being composed. Wherein said cam cam surface of the member and the contact surface of the cam follower is pressed against the cam surface, the cylinder lock of the inclined with that claimed in claim 1, wherein the direction intersecting the axial direction. 3. The cylinder according to claim 1, wherein the spring for pressing the cam follower axially rearward is mounted between the front end of the outer cylinder and the rear end of the latch. Tablets. 4. The second insertion portion of the key is an engagement protrusion extending forward from the front end of the first insertion portion in the insertion direction of the key, and the engagement formed on the rear end portion of the cam member. Part
The cylinder lock according to any one of claims 1 to 3, which is a recess into which the engagement protrusion enters.