JP5369269B2 - key - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a key for a rotary disk tumbler lock, which can be smoothly pulled out from a keyhole. <P>SOLUTION: A first arbitrary and virtual transfer curve, which smoothly connects points (b) running on a surface of a body portion from the center (a) of a recess at a leading end of an engaging protrusion, is set for each of the recesses of the body portion. A guidance curved surface 12 is connected to the recess. The guidance curved surface 12 is formed by continuously moving a curved surface with a small width including a contact point along a generator of the recess along a second transfer curve, along the above transfer curve, of a point of contact between the engaging protrusion and a slope of the recess in the extraction of the key, without changing a direction with respect to an axis line of an inner cylinder thereof. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a cylinder lock key (hereinafter simply referred to as a key), and more particularly to a key that can be smoothly pulled out from a key hole.

  The present applicant has previously proposed a novel rotary disc tumbler tablet with Patent Document 1 described later.

  This rotary disc tumbler lock is an improvement over the so-called lever tumbler lock, and as shown in FIG. 1, is supported by a support shaft 2 parallel to the axis of the inner cylinder 1 so as to be swingable, and is inserted into the center portion. The annular tumbler 4 with the hole 3 opened is urged by a tumbler spring (not shown) in the direction in which the engaging projection 5 approaches the bowl-shaped key recess (hereinafter simply referred to as a recess) 7 of the key 6. When the mating protrusion comes into contact with the bottom surface of the key recess, the unlocking notch 8 of the tumbler is aligned with the locking bar 9 to be unlocked.

In addition, since it is described in patent document 1 and it is known why it will be in an unlocked state, further detailed description is abbreviate | omitted.
JP 2003-193715 A

  In the rotary disc tumbler lock configured as described above or shown in FIG. 1, when the key is pulled out after the locking / unlocking operation, the recess 7 is formed in the recess 7 with respect to the engaging projection 5 restrained by the inner cylinder. And move left.

  In the initial stage when the key is pulled out, as shown in FIGS. 3 and 4, the inclined surface of the key recess 7 and the contact point P of the engagement protrusion 5 pass through the central axis of the recess and are parallel to the moving direction of the key. Further, since the corner of the tip of the engagement protrusion 5 is rounded (see FIG. 2), the contact point P is in a position raised from the bottom surface 11 (see FIG. 3). 4).

  At this time, as shown in FIG. 4, a reaction force Q is generated along a direction set up at a point P on the slope of the depression, and a vertical component R of the reaction force Q pushes up the engagement protrusion, thereby Directional component force S becomes a resistance to keep the key in the keyhole.

  When the key is further moved in the direction of removing the key, the contact point P rises in FIG. 4 and moves upward in FIG. 3, that is, toward the side edge of the key. It is.

  This is because the engagement protrusion 5 of the tumbler swings around the support shaft 2 and the contact point P draws an arc.

  Therefore, as shown in FIG. 5, the normal line set at the contact point P is inclined with respect to a plane passing through the central axis of the depression and parallel to the moving direction of the key, and a component force T perpendicular to the plane is generated.

  Since this component force T acts as a resistance to the rotation of the tumbler 4, the movement of each tumbler of the rotary disk tumbler lock becomes awkward, so that the key cannot be pulled out smoothly.

  Therefore, an object of the present invention is to provide a key that can eliminate the difficulty of pulling out the key due to the operating principle of the rotary disc tumbler lock described above.

  In order to achieve the above-mentioned object, the invention according to claim 1 is directed to an annular tumbler that is supported so as to be swingable by a support shaft parallel to the axis of the inner cylinder and has a key insertion hole opened at the center. The engagement protrusion formed on the opening edge of the insertion hole is urged in the direction close to the bowl-shaped key depression of the key body inserted into the key hole, and the engagement protrusion abuts the bottom surface of the key depression. The unlocking notch formed on the outer edge of the tumbler is a key of the rotary disc tumbler lock that is unlocked by aligning with the locking bar. An arbitrary and virtual first movement curve that smoothly connects the points that run from the center of the recess to the surface of the main body is set, and the contact points of the engagement protrusion and the slope of the recess when the key is pulled out are aligned along the above-described movement curve. 2 A curved surface with a small width along the curve and including the contact point along the generatrix of the depression , Characterized by being connected to the depression induced curved surface continuously moved without changing the orientation with respect to the inner tube axis.

  In the key according to the present invention configured as described above, when the key is removed from the key hole, the first contact point with the slope of the recess of the engaging protrusion is the point P in FIGS. As described above, the normal line does not generate a component force in the width direction of the key, and the contact point approaches the surface of the main body by the action of removing the key due to the wedge action generated between the engaging protrusion and the guide curved surface. At the same time, the engaging projection moves so as to be close to the side edge of the main body by swinging around the support shaft.

  In this case, the normal line standing on the guiding curved surface through the contact point does not always generate a component force in the width direction of the key, so there is no resistance to the rotation of the tumbler, and the tumbler can be pulled out in principle. , Has the expected effect.

  Further, in the case of a conventional rotary disk tumbler lock key, the engagement protrusion is pulled out from the depression at a slight distance ascending the slope of the depression. Since the engagement distance can be increased, there are various effects such as smooth insertion and removal of the key.

  A guide curved surface is connected to each recess, and the normal line set at the contact point between the guide curved surface and the engagement protrusion is not inclined at any time with respect to the axis of the inner cylinder. We were able to eliminate the basic astringency of pulling out the key in the rotary disc tumbler lock.

An embodiment of the present invention will be described below with reference to FIG.
In FIG. 6, reference numeral 11 denotes the bottom surface of one recess 7, and a first movement that does not number a virtual curve that connects the center “a” of the center recess and the point “b” where the tip of the engaging protrusion rides on the surface of the main body. Let it be a curve.

  In the illustrated embodiment, the first movement curve is a line segment ab as a vector, and here, a straight line is also included in the concept of the curve.

  The position of the point b in the width direction (vertical direction in FIG. 6) of the main body is uniquely determined by the distance between the support shaft 2 (see FIG. 1) and the engaging protrusion, but the length of the main body (FIG. 6). The position in the vertical direction) can be arbitrarily set in principle although there is a relationship with other adjacent depressions.

  On the other hand, assuming the point c in the vicinity of the point b and shallow from the surface of the main body, the straight line connecting the point c and the point a is a second movement curve, and the tip of the end mill that forms the depression 7 is The guiding curved surface 12 is formed by moving the point a to the point b by linear and continuous three-dimensional control.

  In the illustrated embodiment, the guiding curved surface is formed to have a substantially V-shape, but the right guiding curved surface 12 is when the key is pulled out, and the left guiding curve is when the key is inserted into the key hole. In general, when the key is inserted, the dynamic frictional resistance acts when the engagement protrusion and the recess are engaged, and is smaller than the static frictional resistance at the time of extraction. The left induction surface is not always necessary.

  Further, there is actually no V-shape having the bottom surface 11 of the depression as a bent portion or an end portion.

  The key according to the embodiment of the present invention formed as described above is that the projection of the normal line set at the contact point between the engaging protrusion and the guide curved surface that is an extension of the slope of the depression is always projected on the inner cylinder. The principle inconvenience caused by the engaging projections swinging around the support shaft 2 in parallel with the axis is eliminated.

  In the vicinity of the end point of the upward movement of the engaging protrusion 5 along the guiding curved surface 12, the contact point with the guiding curved surface 12 moves to the tip of the engaging protrusion and finally climbs on the point b of the main body. .

  Thereafter, the engaging protrusion that has ridden may fall into the adjacent recess along the guide curved surface of the adjacent recess.

The expanded cross-sectional view of a rotary disc tumbler tablet. The expanded sectional view of a hollow and an engagement protrusion. The diagram for demonstrating the force which acts on the engagement protrusion in a hollow. Sectional drawing by the IV-IV line. The diagram for demonstrating the force which acts on an engagement protrusion when a contact point raises. The top view of the main-body part of a key.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner cylinder 2 Support shaft 3 Key insertion hole 4 Tumbler 5 Engagement protrusion 6 Key 7 Depression 8 Unlocking notch 9 Locking bar 11 Bottom surface 12 Guide curved surface

Claims (1)

  An annular tumbler that is supported so as to be swingable by a support shaft parallel to the axis of the inner cylinder and that has a key insertion hole at the center is inserted into the key hole by an engagement protrusion formed on the opening edge of the key insertion hole. The unlocking notch formed on the outer edge of the tumbler is the locking bar when the key body is urged in the direction close to the bowl-shaped key depression and the engaging projection comes into contact with the bottom of the key depression. A rotary disc tumbler lock key that is unlocked in alignment with the disc, and for each recess of the main body, an arbitrary and smooth connection point from the center of the recess at the tip of the engagement protrusion to the surface of the main body A virtual first movement curve is set, and the contact point between the engaging projection and the slope of the depression when the key is pulled out, along the second movement curve along the movement curve, including the contact point along the depression line. The curved surface of the width is continuously transferred without changing the orientation with respect to the inner cylinder axis. Key, characterized in that the connecting in the depression induced curved surface is.

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