JP3063990U - Key duplication tools - Google Patents

Abstract

(57) [Summary] [Problem] A key duplicating tool that can duplicate a key without trouble even when a key is lost or a door is locked while being placed indoors, even if the structure of the lock is complicated and dense. I will provide a. SOLUTION: A hollow thin tube 1 whose tip is bent to a short length and through which a thin flat wire 2 is freely inserted and removed is fitted in a key blank 3 so as to be rotatable, and a key is attached to the head of the key blank. A display plate 4 with a code number is attached, positioned and inserted into a keyhole of the lock by a positioning stopper 5, and the thin thin wire 2 is protruded from the tip of the hollow thin tube 1 to the tumbler of the lock to unlock the tumbler. The position is detected, and an indicator needle 7 is attached to the rear part of the hollow thin tube 1 so that the key code number of the display plate 4 can be indicated. The unlock position of the lock tumbler is displayed by the key code number and the key is duplicated. Key duplication tool.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a key duplication tool for detecting the position of an unlocking groove (unlocking position) of a lock tumbler, displaying the position as a key code number, and duplicating a key based on the key code number.

[0002]

[Problems to be solved by conventional techniques and devices]

 Unlocking and duplicating a key when the key is lost or the door is locked while the door is left indoors, has conventionally been picked with a wire or the like from the keyhole of the lock and unlocked, or a sensor etc. is inserted into the keyhole Is known to detect key code numbers, but in recent years, in order to strengthen anti-theft measures for automobiles and home doors, efforts have been made to make it impossible to easily unlock and duplicate keys. Locks are often used, and their structures are complicated and dense.

[0003] Therefore, there is a lock which cannot be handled by the above-mentioned conventional method, and when the key is lost or the door is locked while being kept indoors, the lock of the door is destroyed and opened, or the key is duplicated. There is a problem that requires a lot of labor and a large cost.

[0004]

[Means for Solving the Problems]

 The present invention intends to present a key duplication tool made in view of the above-mentioned problem, and the solution is as follows. (1) A hollow thin tube whose tip is bent to a short length so that a thin flat wire can be freely inserted and removed, and a key blank which is fitted in a rotatable manner and inserted into a keyhole of a lock. And a display plate attached to the head of the key blank to display the unlock position of the lock tumbler with a key code number, and a positioning stopper that fits into the shank of the key blank to position. The thin tube is fitted into the key blank and inserted and positioned in the keyhole of the lock. A key duplication tool that can be displayed and duplicates the key. (2) Fitting grooves are provided in two rows in parallel on both sides of the center in the longitudinal direction of the key blank, and reliefs are provided on both sides of the tip of the shank so that the hollow thin tube is fitted so that it can rotate. The key duplication tool according to the above (1), wherein the unlock position of the lock tumbler on the opposite side is detected. (3) A display plate formed by bending at right angles into an L-shape is fixed to the head of the key blank, and a key code number is symmetrically marked on the front surface of the display plate, and the detected lock tumbler is detected. The key duplication tool according to the above (1) or (2), wherein an unlocking position is indicated by providing an indicating needle at a rear portion of the hollow thin tube.

[0005]

[Embodiment of the invention]

 An embodiment of the present invention is described by using a number of rotary disk type tumblers (hereinafter referred to as tumblers) 12A,... And 12B on the left and right sides of the inner cylinder 11 of the lock as shown in FIG. The unlocking grooves 12a,... And 12b,... Provided on the outer peripheral portion of the upper surface are arranged at random, and are fitted to the outer cylinder 14 with the lock bar 13 interposed to lock. The present invention will be described with reference to an embodiment for a lock. As shown in FIG. 1, the present invention relates to a hollow thin tube 1 having a thin flat wire 2 with its tip bent to a short length so that it can be freely inserted and removed. A key blank 3 fitted so that the hollow thin tube can be rotated so as to be inserted into a key hole of the lock, and a key blank 3 attached to the head of the key blank and the position of the unlock groove of the lock tumbler (unlocked). 4) is displayed by a key code number, and the key It constituted by a positioning stopper 5 for positioning fitted to link the shank.

As shown in FIG. 2, the hollow thin tube 1 uses a thin pipe of, for example, stainless steel having an outer diameter of about 0.7 to 1.0 mm and has a short end of about 0.7 to 1.0 mm as shown in FIG. The hollow thin tube 1 has a thickness of about 0.05 to 0.06 mm and a width of about 0.4 to 0.6 mm. An elastic thin wire 2 made of, for example, spring steel or stainless steel is attached and a knob 2A is fixed to the rear end of the thin wire to protrude from the tip of the hollow thin tube 1 by about 5 to 6 mm. The block 6 is attached and fixed to the rear part of the hollow thin tube 1 as described above, and the indicator needle 7 is displaced to the right or left from the hollow thin tube 1 so as to form a pair.

The key blank 3 is formed so as to correspond to the keyhole according to the type of lock, and is prepared by a key trader. As shown in FIG. 3, both sides of the center of the key blank in the longitudinal direction are provided. 2 are provided in two rows in parallel, and reliefs 3b are provided on both sides of the tip of the shank. The length L1 from the location of the relief to the head end and the hollow capillary 1 shown in FIG. The hollow thin tube 1 is rotatably fitted to the key blank such that the length L from the bending position of the tip to the block 6 substantially matches.

The display plate 4 is formed by bending a metal or resin thin plate of about 0.5 to 1 mm into an L shape at a right angle, and forming a screw hole 3 c at a bent edge at two locations on the head of the key blank. The surface of the display panel is tightened and fixed by two bolts 8 from the back side so that it does not travel from the end of the head of the key blank, and the surface of the display panel has a certain range according to the unlocking position of the lock tumbler. The key code numbers are marked symmetrically from 1 to 5 in the frame, and the key code numbers of the unlock positions of the lock tumblers arranged in large numbers on the left and right are indicated by being attached and fixed to the rear part of the hollow thin tube 1. The pointer 7 is designated by allocating the needle 7 left and right.

One end of one of the two bolts 8 that fastens and fixes the display plate 4 to the key blank 3 is fitted with a hole at one end of the holding plate 9, and a wing nut 10 is inserted. The positioning stoppers 5, which are fitted into the shank of the key blank 3 and positioned, have a length determined in accordance with the position where the lock tumbler is provided, and are sequentially replaced to replace the lock tumbler. The unlock position is detected.

[0010]

Embodiment An embodiment of duplicating a key according to the present invention configured as described above will be described below. In the present invention, as described above, a large number of tumblers 12A,... And 12B on the left and right sides of the inner cylinder 11 shown in FIG. ,... And 12b,... Are arranged at random and fitted to the outer cylinder 14 with the lock bar 13 interposed therebetween to lock the lock. The embodiment of the present invention has been described. However, if the configuration of the lock is additionally described, tumblers 12A,... And 12B are supported in the inner cylinder 11 shown in FIG. A large number of tumblers 12A,... Are arranged by being supported by a shaft 15 so as to be rotatable and by pressing springs 16 provided on these tumblers against the wall surface inside the inner cylinder 11 and pressing them. In the direction of, 12B,. In a state of being stopped by respective pivots inwardly to direction.

Each tumbler is separated by a fixing plate 17 as shown in FIG. 4, and a gap of about 0.1 mm is provided between the fixing plate 17 and the tumbler to facilitate the rotation of the tumbler. Squeezed. The fixing plate 17 is provided with a groove 17a into which the lock bar 13 is vertically moved with a coil spring 18 interposed. The lower part of the lock bar 13 is fitted into the groove, and At the same time, the upper part of the lock bar 13 is engaged with the engaging groove 14a of the outer cylinder 14 in a wedge-like manner so as not to be pushed down on the outer peripheral upper surface of the tumbler so as to be locked. .

Then, a key is inserted into the keyhole 11a of the lock, and a key pile is applied to the inside of the tumbler, so that the unlocking grooves 12a,... And 12b provided in the tumbler are aligned directly below the lock bar 13. As a result, the lock bar 13 is pushed down, and when the inner cylinder 11 is to be rotated, a force is applied to push down the locked portion by engaging with the wedge-like shape. It is depressed and the lock is unlocked.

An embodiment in which a key in a lock as described above is duplicated by the present invention will be described below. First, tumblers 12A arranged on the left and right sides of the inner cylinder 11 of the lock shown in FIGS. 12B,... Are checked.

As an example of checking the presence or absence of the tumbler arrangement, with the hollow thin tube 1 shown in FIG. 1 removed, the display plate 4 is inserted upward into the keyhole of the lock as shown in FIG. The rod 19 having a straight tip is inserted into the fitting groove 3a, and whether or not the tip abuts or penetrates the tumbler is sequentially replaced by the positioning stopper 5. If you hit it, there is a tumbler, and there is no time to pierce. Instead of the rod 19, an indicator needle 7 (FIG. 2) attached and fixed to the rear portion of the hollow thin tube 1 may be used. In the state of FIG. 6, the tumblers 12A,... Shown in FIG. 5 are on the left side, and 12B,.

The positioning stopper 5 is the shortest (or sometimes unnecessary) in the case of a tumbler disposed at the innermost position of the lock, and is sequentially replaced with a positioning stopper added with an arrangement pitch toward the front. The following description is based on the assumption that Table 1 results. The circles have tumblers, and the blanks have no tumblers. The lock has nine tumblers on the left and right.

[0016]

[Table 1]

Next, the detection of the position of the unlocking groove of the tumbler described in Table 1 will be described with reference to FIGS. 7 and 8. When the display plate 4 shown in FIG. The part is drawn inward with the thin flat wire 2 drawn in (at this time, the indicating needle 7 faces downward), and inserted into the keyhole of the lock to obtain the state shown in FIG.

The positioning stopper 5 has, for example, NO. 1 to NO. No. 9 is marked, and NO. No. 1 is the longest, and is shortened in accordance with the pitch pitch of the tumbler. 9 is the shortest, and the NO. No. 9 may be unnecessary if the shank of the key blank 3 is machined according to the position of the tumbler of SEQ ID No. 9 in Table 1.

When the positioning is performed by the positioning stopper 5, the bending tip of the hollow thin tube 1 is directed obliquely to the side of the tumbler as shown in FIG. The tip of the thin thin wire 2 protruding by pushing 2A detects the position of the unlock groove 12a provided in the tumbler 12A from the gap of about 0.1 mm between the tumbler and the fixing plate 17 (FIG. 4). . Alternatively, the position of the unlocking groove 12a is found by rotating the protruding thin thin wire 2 left and right.

In FIG. 8, the position of the unlocking grooves 12a of the tumbler 12A arranged on the left side is detected by fitting the hollow thin tube 1 to the right side of the fitting grooves 3a provided in two rows in the key blank. However, in the case of detecting the unlocking groove of the tumbler arranged on the right side, the opposite is performed, and the unlocking position of the tumbler arranged on the opposite side is detected.

The detection position of the unlocking groove 12a of the tumbler 12A arranged on the left side is determined by the right hand key of the display panel 4 by the pointing needle 7 displaced rightward and fixed to the rear of the hollow thin tube 1. The code number is indicated, and the detection position of the unlocking groove of the tumbler arranged on the right side is indicated by the indicating needle (not shown) fixed to the rear part of the hollow thin tube 1 by being displaced leftward and fixed. The key code number of the left hand is indicated.

As described above, the position of the unlocking groove of the tumbler arranged on the lock can be indicated by the key code number. The key code number is checked by sequentially replacing the tumbler with a positioning stopper corresponding to the sequence number of the tumbler, such as from the back of the tumbler to the front, and then from the back of the right tumbler to the front. The following description is based on the assumption that the result is as shown in Table 2.

[0023]

[Table 2]

In Table 2 above, the key code number is located at the tip of the tumbler, there is no unlocking groove, and the dimension of the position P (FIG. 5) of the unlocking groove of the tumbler increases as the key code number increases. Becomes larger, and the depth of cut when processing the unevenness of the key becomes larger, but the depth of cut is fixedly determined by the key code number. Then, based on the key code number, a key blank that matches the keyhole of the lock is copied by, for example, a key duplicator, as shown in FIG.

[0025]

[Effect of the invention]

 According to the present invention, a hollow thin tube whose tip is bent to a short length and a thin thin wire is freely inserted and removed is fitted into the key blank so as to be rotatable, and inserted into the keyhole of the lock, Since the unlocked position of the tumbler arranged on the lock is detected and indicated by the key code number, even if the structure of the lock is complicated and dense, it will not be destroyed or require labor. In other words, the unlock position can be detected accurately and the correct key code number can be determined.

[0026] Furthermore, by finding out the correct key code number, accurate key duplication is facilitated, labor such as key rework is eliminated, and the cost required for key duplication can be reduced.

[0027] Furthermore, the replication tool itself has a simple configuration, has no production cost, and has an advantage that it can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of a hollow thin tube.

FIG. 3 is a perspective view showing an embodiment of a key blank.

FIG. 4 is a perspective view showing an embodiment of a lock structure.

FIG. 5 is a perspective view showing an embodiment of a tumbler arrangement of a lock.

FIG. 6 is a perspective view showing an embodiment for checking whether or not a tumbler of a lock is provided.

FIG. 7 is a perspective view showing a state where the present invention is inserted into a lock.

FIG. 8 is a perspective view showing an embodiment in which an unlock groove provided in a tumbler of a lock is detected and a key code number is indicated in the state of FIG. 7;

FIG. 9 is a perspective view of a duplicated key.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow thin tube 2 Fine wire 2A knob 3 Key blank 3a Fitting groove 3b Relief 3c Screw hole 4 Display plate 5 Positioning stopper 6 Block 7 Indicator needle 8 Bolt 9 Holding plate 10 Wing nut 11 Inner cylinder 11a Keyhole 12A, 12B Tumbler 12a 12a Lock groove 13 Lock bar 14 Outer cylinder 14a Engagement groove 15 Support shaft 16 Spring 17 Fixing plate 17a Groove 18 Coil spring 19 Rod

Claims (3)

[Utility model registration claims] 1. A hollow thin tube whose tip is bent to a short length so that a thin thin wire can be freely inserted and removed, and a key blank which is rotatably fitted to the hollow thin tube and inserted into a keyhole of a lock. A display plate attached to the head of the key blank to display the unlock position of the lock tumbler with a key code number, and a positioning stopper that fits into the shank of the key blank and positions the key blank. To be inserted into the keyhole of the lock and positioned, and the thin thin wire protrudes from the tip of the hollow thin tube toward the lock tumbler so that the unlock position of the lock tumbler can be detected and displayed by the key code number. A key duplication tool for duplicating a key. 2. A key blank is provided with two rows of fitting grooves in parallel on both sides of the center in the longitudinal direction, and reliefs are provided on both sides of the tip of the shank, and the hollow thin tube is fitted so as to be rotatable, 2. The key duplication tool according to claim 1, wherein the unlock position of the lock tumbler on the opposite side is detected. 3. A lock tumbler detected by attaching a display plate formed by bending at right angles in an L-shape to the head of a key blank, and symmetrically writing a key code number on the front surface of the display plate. The key duplication tool according to claim 1 or 2, wherein an unlocking position is indicated by providing an indicating needle at a rear portion of the hollow thin tube.