JP3984672B2 - Key insertion guide device for cylinder lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a key insertion guide device for a cylinder lock.
[0002]
[Prior art]
As a key insertion guide device in a conventional cylinder lock, a sub key guide that is rotated together with the main key guide is mounted in front of the main key guide of the cylinder lock, and a mortar-like shape is provided on the front surface of the sub key guide. An example is one in which a concave portion is formed and a key insertion hole that is aligned with the key hole of the main key guide is provided on the wall surface of the concave portion. Such a technique is disclosed in, for example, Japanese Utility Model Publication No. 3-61074.
[0003]
According to the above-described conventional device, when the key is directed toward the key hole on the front surface of the main key guide, the key tip moves along the conical inclined surface in the recessed portion of the sub key guide even if the key tip is slightly displaced. Because it is guided and guided, the key can be inserted into the main key guide of the lock quite easily.
[0004]
However, considering the point in time when the key tip reaches the bottom of the recess in the insertion operation, the key held by the finger is free to rotate around the central axis, and the tilt of the central axis is free. For this reason, the key tip does not exactly match the keyhole.
[0005]
Therefore, the operator must finely adjust the position of the key so as to search at the key tip in the final stage of inserting the key into the key hole of the main key guide.
[0006]
This insertion operation is still troublesome if the operator is a clumsy person or an elderly person.
[0007]
[Problems to be solved by the invention]
The key insertion guide device for the cylinder lock of the present invention has been proposed for the purpose of enabling the key insertion operation to be performed very smoothly even if the operator is a clumsy person or an elderly person.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a sub key guide that is rotatable with the main key guide is mounted in front of the main key guide of the cylinder lock, and the front is widened in the front portion of the sub key guide. The first guide hole in the shape of a quadrangular pyramid is provided, and the second guide hole in the shape of a square pillar connected to the first guide hole and the key hole of the main key guide is provided in the rear part of the sub key guide, and the rearmost part of the first guide hole Both the cross-sectional shape and the cross-sectional shape of the second guide hole are sized to circumscribe the front shape of the key hole of the main key guide, and the key holes of the first guide hole, the second guide hole, and the main key guide are By aligning the respective central axes , a long guide hole can be formed in front of the main key guide, and the key hole is corrected by correcting the inclination of the central axis of the key by the connecting portion of the first and second guide holes. so as to match that of, whereas, the first and second guide A key groove is formed by forming a relief groove parallel to the central axis of the key hole on the inner wall surface over the hole, and bringing the key protrusion or the front edge of the key knob into contact with the remaining contact portion of the end. The feature is that the depth is regulated.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
1 to 3, reference numeral 10 denotes a door, 20 denotes a lock box fixed to the door 10, 1 denotes a mounting cylinder fixed to the lock box 20 by a fixing rod 11 or the like, and 2 denotes insertion into the mounting cylinder 1 from the rear. An outer cylinder of a cylinder lock whose rear end is pressed by a retaining ring 32 via a spacer 31, 33 is a retaining spring fitted between the mounting cylinder 1 and the outer cylinder 2, and 5 is an inside of the outer cylinder 2. A main key guide 61 integrally provided on the front end side of the inner cylinder 6 and protruding from the front opening of the outer cylinder 2 and the mounting cylinder 1 is a tail piece provided at the rear end of the inner cylinder 6 of the cylinder lock. It is.
[0010]
The main key guide 5 described above has a circular outer cross-sectional shape, and a rear portion in the thickness direction of the sub key guide 7 having an annular shape larger in diameter than the main key guide 5 is fitted around the front protruding portion. It is.
[0011]
The fitting portion of the main key guide 5 is provided with an arbitrary number (four in the illustrated example) of fitting grooves 51 parallel to the rotation center axis, and the fitting portion of the sub key guide 7 is rotated. An arbitrary number (four in the illustrated example) of protrusions 71 that are parallel to the central axis are integrally provided.
[0012]
When the sub key guide 7 is attached to the main key guide 5, the fitting groove 51 and the protrusion 71 are fitted to each other, so that both are integrated and can rotate together.
[0013]
With respect to the fitting groove 51 and the protrusion 71 as a detent means between the main key guide 5 and the sub key guide 7, the fitting groove is provided in the sub key guide 7 and the protrusion is provided in the main key guide 5. You may do it.
[0014]
As shown in FIGS. 1 and 2, in this embodiment, the holding cylinder 8 is mounted around the mounting cylinder 1 in order to prevent the auxiliary key guide 7 from coming out of the main key guide 5 in the axial direction. It is.
[0015]
The holding cylinder 8 is formed by superposing an inner member 81 and an outer member 82, and a base portion thereof is fixed to the mounting cylinder 1 by caulking means 83 or the like.
[0016]
The distal end portion of the outer member 82 in the holding cylinder 8 is formed in a stopper portion 84 that is bent inward to hold down the front surface portion of the sub key guide 7.
[0017]
In FIG. 2, reference numeral 85 denotes a receiving ring having a L-shaped cross section mounted in a space surrounded by the front end surface of the mounting cylinder 1 and the inner surface on the front end side of the holding cylinder 8, for receiving the sub key guide 7. However, the receiving ring 85 is not necessarily provided.
[0018]
In FIG. 1 and FIG. 2, reference numeral 9 denotes a decorative ring whose outer shape fitted around the fitting portion of the mounting cylinder 1 and the holding cylinder 8 forms a truncated cone shape. The compression spring 91 fitted around is sandwiched between the base end of the holding cylinder 8 and the spring receiving portion 92 of the decorative ring 9 in the longitudinal direction, so that the base end portion is elastically applied to the surface of the door 10. Touched.
[0019]
The mechanism for elastically contacting the decorative ring 9 to the door 10 by the compression spring 91 is for dealing with a difference in the thickness of the door.
[0020]
A quadrangular pyramid-shaped first guide hole 72 with a wide front is provided in the front portion in the thickness direction of the sub key guide 7, and a quadrangular columnar second guide hole 73 is provided in the rear portion of the sub key guide 7.
[0021]
The second guide hole 73 communicates with the first guide hole 72 at the front portion and the key hole 52 of the main key guide 5 at the rear portion.
[0022]
The cross-sectional shape of the rearmost portion of the first guide hole 72 and the cross-sectional shape of the second guide hole 73 are both formed into a rectangle that is substantially circumscribed by the front shape of the key hole 52 of the main key guide 5. is there.
[0023]
In other words, the key hole 52 of the main key guide 5 is formed in a rectangular shape having a size that substantially includes the front shape.
[0024]
Further, the first guide hole 72, the second guide hole 73, and the key hole 52 of the main key guide 5 are connected so that their respective central axes are substantially aligned.
[0025]
Next, an example of the key 4 used for the key insertion guide device of the present invention will be described with reference to FIGS.
[0026]
The key 4 is inserted into the key hole 52 of the main key guide 5 through the first guide hole 72 and the second guide hole 73 of the sub key guide 7 as will be described in detail later. A pin-shaped protrusion 43 is provided as a stopper protruding by caulking or the like on one surface or both surfaces of the flat plate surface of the stem portion 41 having a flat plate shape.
[0027]
The protrusion 43 is an escape groove 74 provided on the inner wall surface from the first guide hole 72 to the second guide hole 73 of the sub key guide 7 along the central axis of the sub key guide 7 when the key 4 is inserted. The insertion depth (length) of the key 4 with respect to the cylinder lock is regulated by abutting with the abutting portion 75 at the end of the escape groove 74 left uncut.
[0028]
Two escape grooves 74 may be provided at a position sandwiching the central axis as shown in the drawing, or only one may be provided. Further, the contact portion (75) at the end of the escape groove 74 may not be provided. In that case, the protrusion 43 of the key 4 is brought into contact with the front surface of the main key guide 7 so that the insertion depth of the key 4 is increased. regulate.
[0029]
However, the protrusion 43 described above is not essential. In a key (not shown) having no protrusion (43), for example, the front end edge of the key knob (42) is brought into contact with the front surface of the sub key guide 7 or the inclined surface of the first guide hole 72. Regulate insertion depth.
[0030]
Next, the operation of inserting the key 4 into the cylinder lock with the apparatus according to the present invention will be described with reference to FIGS.
[0031]
First, the key 4 is directed to the first guide hole 72 of the sub key guide 7 in accordance with the type of the key insertion type (whether the flat plate surface of the key is inserted horizontally or inserted vertically). When pushed in as it is, the angle around the central axis is regulated at the four inclined surfaces of the first guide hole 72, and then the inclination of the central axis of the key 4 is corrected at the second guide hole 73. The central axis coincides with the central axis of the key hole 52.
[0032]
As shown in FIG. 7, the length of the second guide hole 73 in the cylinder lock axis direction is preferably longer than that of the pointed tip of the key 4.
[0033]
Here, since the key 4 is kept in the proper posture with respect to the key hole 52 by the second guide hole 73 of the sub key guide 7, it is only necessary to press the key 4 after that, and the key 4 is inserted into the key hole 52 very smoothly. .
[0034]
If a part or all of the sub key guide 7 is made of a polymer material containing a phosphorescent component, it emits light in the dark at night or the like, so that the operation of inserting the key into the first guide hole 72 is easier. It will be a thing.
[0035]
【The invention's effect】
According to the key insertion guide device in the cylinder lock of the present invention described above, the key tip is directed to the first guide hole of the sub key guide, and thereafter the key hole is searched for, or the key tip position is determined. There is no need to consciously make fine adjustments, and the correct insertion posture of the key can be taken automatically simply by pressing the key, so the effect of making the key insertion operation especially in the dark at night is extremely easy. Play.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a key insertion guide device in a cylinder lock according to the present invention.
FIG. 2 is a partial longitudinal side view thereof.
3A and 3B are views of the sub key guide removed from the embodiment of FIG. 1, in which FIG. 3A is a front view, FIG. 3B is a rear view, and FIG.
4A and 4B are diagrams showing an example of a key used for the embodiment of FIG. 1, in which FIG. 4A is a plan view, and FIG.
5 is a partially longitudinal side view showing a first stage of inserting a key into the embodiment of FIG. 1;
FIG. 6 is an explanatory diagram showing the second stage of key insertion in a plan view.
FIG. 7 is an explanatory diagram showing the third stage of key insertion in a plan view.
FIG. 8 is a partially longitudinal side view showing the final stage of key insertion.
[Explanation of symbols]
5 Main key guide 52 Key hole 7 Sub key guide 72 First guide hole 73 Second guide hole

Claims (1)

A secondary key guide that can be rotated together with the main key guide is mounted in front of the main key guide of the cylinder lock, and a first pyramid-shaped first guide hole having a wide front is provided at the front portion of the sub key guide. A quadrangular column-shaped second guide hole that is continuous with the first guide hole and the key hole of the main key guide is provided in the rear part of the sub-key guide, and the cross-sectional shape of the last part of the first guide hole and the cross-section of the second guide hole Each of the shapes is circumscribed by the front shape of the key hole of the main key guide, and the first guide hole, the second guide hole, and the key hole of the main key guide are made to coincide with the center axis of each, so that A long guide hole can be formed in front of the key guide, and the inclination of the central axis of the key is corrected by the connecting portion of the first and second guide holes so as to coincide with that of the key hole . And an inner wall surface extending over the second guide hole parallel to the central axis of the key hole Cylinder characterized in that a relief groove is formed, and the key insertion depth is regulated by bringing the key protrusion or the front edge of the key knob into contact with the remaining contact portion of the end. Key insertion guide device for locks.

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