JP4721369B2 - Pin tumbler lock with cylindrical key - Google Patents

Description

The present invention relates to a pin tumbler lock using a cylindrical key in which a cylindrical key is inserted into an annular key hole and a contact point between a driven pin and a drive pin is moved to a lock release position.

A pin tumbler lock using a cylindrical key is formed with a plurality of grooved key code recesses radially on the outer peripheral surface of the cylindrical key, so that many key differences can be obtained for various applications. in use.

However, the first pin receiving hole in which the driven pin is accommodated is formed in the rotor along the direction of the central axis of the rotor, and the second pin receiving hole in which the drive pin and the biasing spring are accommodated is the central axis of the rotor. Accordingly, the depth of the entire lock is long (see Patent Document 1).

If there is room in the internal space of the object to be used for the lock, and the length of the protruding part of the lock into the internal space is not questioned, it is acceptable, but when there is no room in the internal space of the object to be used, etc. The depth dimension of the lock is a problem.

Japanese Utility Model Publication No. 5-30376

An object of the present invention is to provide a pin tumbler lock using a cylindrical key that can reduce the depth dimension of the lock without deteriorating the performance as a lock.

The pin tumbler lock using the cylindrical key of the present invention has a small-diameter cylindrical part and a large-diameter disk part formed back and forth along the central axis of the rotor so that the rotor can be rotated on a fixed main body fixed to an object to be used. An annular guide opening is formed in the direction of the central axis of the rotor, and the guide opening is extended to the large-diameter disk portion of the rotor. An annular key hole is formed in the direction of the central axis of the rotor on the line, and a plurality of first pin receiving holes are formed radially in the large-diameter disk portion of the rotor in a direction perpendicular to the central axis of the rotor. An inner end of the first pin receiving hole is opened in the outer wall surface of the key hole, and a plurality of second pin receiving holes are formed radially in the fixed body in a direction perpendicular to the central axis of the rotor. Two pin receiving holes are connected to the first pin receiving hole, and the first pin receiving hole is connected to the first pin receiving hole. In the state where the moving pin is accommodated, the driving pin and the biasing spring are accommodated in the second pin receiving hole, and the cylindrical key is removed from the key hole, the tip of the driven pin is biased by the spring The contact point between the rear end of the driven pin and the front end of the drive pin enters the first pin receiving hole, and the cylindrical key has an outer peripheral surface on the outer surface of the cylindrical key. When a key is inserted into the key hole, a key code recess for moving the contact point between the rear end of the driven pin and the tip of the drive pin to the outer peripheral surface of the large-diameter intermediate portion of the rotor is provided at the center of the rotor. Rotational force transmission in which a plurality of radial shapes are formed by changing the depth in a direction perpendicular to the axis, and a part of the knob plate of the cylindrical key is engaged when the cylindrical key is inserted into the key hole. In which a notch is recessed in a part of the outer peripheral surface of the small-diameter cylindrical portion of the rotor It is.

Thus, in the pin tumbler lock using the cylindrical key of the present invention, when the cylindrical key is inserted into the key hole, the notch for transmitting the rotational force with which a part of the knob plate of the cylindrical key is engaged is provided on the rotor. Since the rotational force transmission notch interferes with a driven pin projectingly arranged in the key hole, the rotation allowable angle of the rotor is constrained narrowly because it is provided in a part of the outer peripheral surface of the small-diameter cylindrical portion. In addition, a plurality of driven pins can be protruded from the key hole within a wide allowable rotation angle.
According to the pin tumbler lock of the present invention , a plurality of first pin receiving holes of the rotor and second pin receiving holes of the fixed body are formed radially in a direction perpendicular to the central axis of the rotor, and the driven pins are the central axis of the rotor. Corresponding to this, a key code recess that presses the tip of the driven pin and moves the contact point of the driven pin and the drive pin to the outer peripheral surface of the rotor , correspondingly, Since the depth is changed in the direction perpendicular to the central axis of the rotor and multiple outer peripheral surfaces of the cylindrical key are formed , the depth dimension of the entire lock is necessary and sufficient without deteriorating the performance of the lock. Can be reduced.
Since the protruding portion of the lock into the internal space of the object to be used can be reduced, the application range of the lock is expanded.

In the embodiment shown in FIGS. 1 to 5, the fixed main body 1 has a threaded cylindrical portion 5 that abuts the circular flange 2 against the front surface of the object 3 and protrudes from the mounting hole 4 of the object 3 to the back side. The nut 6 is screwed to the object 3 to be used. The front surface of the small diameter cylindrical portion 8 of the rotor 7 is at the same surface position as the front surface of the fixed main body 1, and the guide opening 9 formed on the inner peripheral portion of the fixed main body 1 facing the outer periphery of the small diameter cylindrical portion 8 includes An insertion positioning notch 12 coinciding with the insertion positioning protrusion 11 of the cylindrical key 10 is formed on the inner peripheral wall surface thereof. In addition, an extraction notch 13 through which the insertion positioning protrusion 11 can pass is formed at an interval of 90 degrees from the insertion positioning recess 12 on the inner peripheral wall surface of the guide opening 9. It can be removed even in the rotated unlocking position.

The large-diameter disk portion 14 of the rotor 7 is prevented from escaping from the fixed main body 1 by a disk-like back plate 15 fitted and fixed to the rear surface of the fixed main body 1. A rotation angle restricting plate 17 and a stopper plate (not shown) are fitted to the small diameter shaft portion 16 of the rotor 7 protruding from the back plate 15 and fixed to the rotor 7 by a washer plate 19 and screws 20. . The rotation angle restricting plate 17 engages with a rotation positioning protrusion (not shown) formed on the rear surface of the fixed main body 2 to restrict the rotation angle of the rotor 7 to 90 degrees. If the object to be used is an equipment box, the stopper plate 17 engages / disengages with a metal receiving (not shown) provided on the box body side, and locks the door of the equipment box to the box body.

The key hole 21 formed in the large-diameter disk portion 14 of the rotor 7 has the same shape as the guide opening 9 and reaches a depth exceeding the first pin receiving hole 22. The first pin receiving hole 22 is formed in an intermediate region of the thickness of the large-diameter disk portion 14, the inner end opens on the outer wall surface of the key hole 21, and the outer end opens on the outer peripheral surface of the large-diameter disk portion 14. is doing. The second pin receiving hole 23 formed in the fixed main body 1 is on the extension line of the first pin receiving hole 22, the inner end is opened on the inner peripheral surface of the fixed main body 1, and the outer end is the outer periphery of the fixed main body 1. Open to the surface.

The driven pin 24 and the drive pin 25, which are locking elements as pin tumblers, are pins having a circular cross section, and the urging spring 26 that abuts on the base end of the drive pin 25 is constituted by a compression coil spring. The outer end of the second pin receiving hole 23 is closed by a spring pressing member 27. The tip of the driven pin 24 is in contact with the inner wall surface of the key hole 21 when the cylindrical key 10 is removed from the key hole 21. The inner wall surface of the key hole 21 is on an extension line of the outer peripheral surface of the small diameter cylindrical portion 8.

In the locked state in which the cylindrical key 10 is extracted from the key hole 21, the contact point between the base end of the driven pin 24 and the tip end of the drive pin 25 has moved into the first pin receiving hole 22, and the drive pin Since 25 is engaged across the first pin receiving hole 22 and the second pin receiving hole 23, the rotation of the rotor 7 with respect to the fixed main body 1 is restrained.

When the cylindrical key 10 is inserted into the key hole 21, the key code recess 28 on the outer peripheral surface of the cylindrical key 21 abuts on the tip of the driven pin 24 and pushes the driven pin 24 outward. The contact point between the base end of the rotor and the tip of the drive pin 25 moves to the outer peripheral surface of the large-diameter disk portion 14 of the rotor 7. As a result, the rotation restraint of the rotor 7 with respect to the fixed body 1 is released. When the cylindrical key 10 is turned in a predetermined direction, a rotational force is transmitted through the notch 18 of the rotor 7 with which a part of the knob plate 29 of the cylindrical key 10 is engaged. The metal plate moves to the unlocked position where it has been detached from the money receiver.

In another embodiment shown in FIG. 6, the first pin receiving hole 22 of the large-diameter disk portion 14 of the rotor 7 is formed as a stepped hole, and the follower pin 24 is also changed into a stepped pin correspondingly. Is formed. In this embodiment, when the cylindrical key 10 is removed from the key hole 21, a gap is left between the tip of the driven pin 24 and the inner wall surface of the key hole 21. Since other configurations are the same as those in the above embodiment, description thereof will be omitted.
In any of the above embodiments, the thickness of the large-diameter disk portion 14 of the rotor 7 can be further reduced, and the first pin receiving hole 22 can be formed in the front surface portion of the large-diameter disk portion 14.

It is a front view of the pin tumbler lock using the cylindrical key which concerns on one Example of this invention, and the cylindrical key is extracted. It is AA ship sectional drawing of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is sectional drawing corresponding to FIG. 2 when a cylindrical key is inserted in the pin tumbler lock of FIG. FIG. 2 is a front view of a cylindrical key used for the pin tumbler lock of FIG. It is principal part sectional drawing of the pin tumbler lock using the cylindrical key which concerns on another Example of this invention.

DESCRIPTION OF SYMBOLS 1 Fixed main body 2 Circular collar part 3 of a fixed main body Target object 4 Mounting hole 5 of a target object Screw cylinder part 6 of a fixed main body Nut 7 Rotor 8 Small diameter cylindrical part 9 of a rotor 9 Guide opening 10 in a fixed main body Cylindrical key 11 cylindrical key insertion positioning projection 12 fixed body insertion positioning notch 13 fixed body extraction notch 14 rotor large diameter disk 15 fixed body back plate 16 rotor small diameter shaft portion 17 rotation angle restricting plate 18 rotational force transmission Notch 19 Washer plate 20 Screw 21 Key hole 22 of rotor large-diameter disk portion First pin receiving hole 23 of rotor Second pin receiving hole 24 of fixed main body Driven pin 25 Drive pin 26 Energizing spring 27 Spring presser Member 28 Key code recess 29 of cylindrical key Cylindrical key knob

Claims (1)

A small-diameter cylindrical part and a large-diameter disk part are formed forward and backward along the central axis of the rotor, the rotor is rotatably accommodated in a fixed body fixed to the object to be used, and a cylinder is disposed on the outer periphery of the small-diameter cylindrical part of the rotor An annular guide opening into which the key is inserted is formed in the direction of the central axis of the rotor, and an annular key hole is formed in the large diameter disk portion of the rotor on the extension line of the guide opening in the direction of the central axis of the rotor. A plurality of first pin receiving holes are formed radially in the large-diameter disk portion of the rotor in a direction perpendicular to the central axis of the rotor, and an inner end of the first pin receiving hole is formed as the key hole. A plurality of second pin receiving holes are formed radially in the fixed body in a direction perpendicular to the central axis of the rotor, and the second pin receiving holes are formed into the first pin receiving holes. , The driven pin is accommodated in the first pin receiving hole, and is driven to the second pin receiving hole. When the cylindrical key is removed from the key hole, the tip of the follower pin is protruded into the key hole by the bias of the spring, while the follower pin is When the cylindrical key is inserted into the key hole on the outer peripheral surface of the cylindrical key, the contact point between the end and the tip of the drive pin enters the first pin receiving hole. The key code recess that moves the contact point between the rear end and the tip of the drive pin to the outer peripheral surface of the large-diameter intermediate portion of the rotor is radially changed by changing the depth in a direction perpendicular to the central axis of the rotor. When a plurality of the cylindrical keys are inserted into the key holes, a rotational force transmission notch that engages with a part of the knob of the cylindrical key is formed on the outer peripheral surface of the small-diameter cylindrical portion of the rotor. A pin tumbler lock using a cylindrical key , recessed in part .

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