JP4168162B2 - Key guide - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention enables even a person who has difficulty in movement of eyes and hands to easily insert a key into the keyhole of the cylinder lock, prevents dust and moisture from entering the cylinder lock, and so-called picking and The present invention relates to a key guide capable of improving the safety of a lock by making an unauthorized unlocking operation called difficult.
[0002]
[Prior art]
A cylinder lock is attached to the door of the building, but because the clearance between the keyhole and the key of the cylinder lock is small, the key and the keyhole must be centered exactly when locking and unlocking. Need to be inserted.
[0003]
[Problems to be solved by the invention]
However, since the keys and keyholes are very small in size, it is very difficult to accurately align the center of the key and the keyhole, especially for people with limited eyes and hands. In recent social situations, as part of measures for the elderly, it is required to prepare an environment that is easy to use even with cylinder locks.
[0004]
In addition, since the keyhole is always open toward the external space, it is well known that dust, rainwater blown off by wind, etc. are likely to enter, and the operation will not be smooth after long-term use.
[0005]
Furthermore, in recent years, crimes such as empty webs due to illegal unlocking, particularly called picking, are increasing, but unfortunately, conventional locks cannot completely prevent picking.
[0006]
Therefore, the present invention can easily insert a key into the keyhole of the cylinder lock even by a person who has difficulty in movement of eyes or hands, and can prevent dust and moisture from entering into the cylinder lock, so-called It is an object of the present invention to provide a key guide for a cylinder lock which can improve the safety of the lock by making an unauthorized unlocking operation called picking difficult.
[0007]
[Means for Solving the Invention]
In order to achieve the above object, the present invention is a thick rotating body that is rotatably mounted integrally with the outer end portion of the inner cylinder of the cylinder lock. Each of the shutter storage spaces is formed on the inner surface side, and a key guide block having a key insertion hole large enough to allow the shoulder portion of the key to pass through in the center, and in the longitudinal direction of the key insertion hole in the shutter storage space A pair of elongated blocks extending in front of the outer end surface of the inner cylinder of the cylinder lock, between the closed position for closing the half of the width direction of the key insertion hole and the opening position for retreating from the key insertion hole. The shutters are movably guided and urged in the direction of elastic contact with each other, and have a V-shaped cross section at the outer surface joint portion of each shutter leaving the joint edge when the key insertion hole is closed. Form a slender, sloping surface that forms part of The edge and the inclined surface smoothly connected cross-section by an arc-shaped connecting curved surface, while each shutter shaped guide rod in the center in the longitudinal direction in the overall shape is T-shaped and integrally projected The guide guide is inserted into the key-shaped shutter storage space of the key guide block and guided in the length direction of the guide rod, and a shutter spring is mounted in a spring hole formed in the guide rod .
[0008]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a cylinder lock. The cylinder lock 1 is mounted and fixed to the door outer surface 3 via a cylinder cylinder 2.
[0009]
Incidentally, the cylinder cylinder 2 is a cup-shaped member, which is formed integrally with the opening edge of the cylinder cylinder 2 and has a mounting piece 4 in a lock box (not shown) mounted in the door and a mounting rod penetrating the side surface of the lock box. By 5 and 5, it is being fixed to the door via the lock box.
[0010]
In addition, since the attachment mechanism of the cylinder lock via this cylinder cylinder 2 is known, further detailed description is abbreviate | omitted.
[0011]
The outer end portion of the inner cylinder 6 of the cylinder lock 1 is inserted through the bottom opening of the non-numbered cylinder tube 2 and protrudes out of the cylinder tube 2, and the key guide block 7 is prevented from rotating at the outer end portion. Are attached so as to be integrated, and are fixed so as not to come out by a decorative tube 9 that is caulked 8 to the cylinder tube 2.
[0012]
The key guide block 7 is a thick-walled rotating body. A shallow bowl-shaped guide surface 11 (see FIGS. 2 and 3) is provided on the outer surface (left surface in FIG. 1), and a shutter is accommodated on the inner surface side. Each space 12 is formed.
[0013]
Further, a key insertion hole 14 that can circumscribe the key hole 13 is opened at the center. The keyhole 13 in the illustrated embodiment is a keyhole of a novel rotary disc tumbler lock previously proposed by the present applicant with Japanese Patent Application No. 2001-316885, but the cylinder lock to which this invention is applied is not necessarily a rotary lock. Not only disk tumbler locks but also conventional lever tumbler locks are suitable.
[0014]
In a state where the key hole 13 is viewed through the key insertion hole 14 the shutter is opened as shown in FIG. 3, the key insertion hole 14 is circumscribed in the key hole only in the thickness direction of the key (the vertical direction in FIG. 3) A part of the outer end surface of the inner cylinder can be seen on the left and right sides of the key hole 13, and the shoulder portion of the combined key comes into contact with this portion.
That is, the opening of the key insertion hole 14 is large enough to pass the shoulder portion of the base portion of the key.
[0015]
On the other hand, for example, a pair of shutters 15 having the shape shown in FIGS. 4 to 6 is stored in the shutter storage space 12 and is guided so as to be movable in the vertical direction in FIGS. 1 to 3 as will be described later. .
[0016]
The shutter 15 is an elongated block body extending in the longitudinal direction of the key insertion hole 14 (left and right in FIGS. 1 to 3) as shown in FIGS. 2 to 6, and as shown in FIG. In front of the outer end surface of the inner cylinder 6, there is a gap between a closed position (see FIG. 2) that closes half of the key insertion hole 14 in the width direction and an open position (see FIG. 3) that retreats from the key insertion hole 14. It is guided to be movable.
[0017]
The pair of shutters 15 and 15 are biased in a direction in which they are elastically contacted with each other, that is, in a direction in which the key insertion hole 14 is closed close to each other by the elasticity of the shutter spring 16 as a compression coil spring. Yes.
[0018]
Specifically, it is configured as shown in the illustrated embodiment, for example.
That is, as shown in FIGS. 4 to 6, the shutter 15 is integrally formed with a prismatic guide rod 17 at the center in the length direction, and the entire shape is formed in a T shape.
[0019]
On the other hand, the key guide block 7 can be integrally formed. However, in the illustrated embodiment, as shown in FIGS. 7 to 12, as shown in FIGS. It is assumed that the first and second key guide blocks 71 and 72 are divided in the front-rear direction along the axial direction.
[0020]
As shown in FIGS. 7 to 9, the first key guide block 71 is formed with a guide surface 11 and a key insertion hole 14.
[0021]
Further, the second key guide block 72 has a thick disk shape as shown in FIGS. 10 to 12, and a substantially K-shaped opening at the center as shown in FIGS. Is formed.
[0022]
Then, the connecting ring portion 18 (see FIG. 11) formed on the outer surface side of the second key guide block 72 is connected to the connecting recess portion 19 (see FIGS. 8 and 9) formed on the inner surface side of the first key guide block 71. And the two spaces are combined to use the space of the second key guide block 71 as the shutter storage space 12.
[0023]
The shutter 15 and the guide rod 17 are inserted into the shutter storage space 12 as shown in FIGS. 10 and 11, and the spring storage hole 21 and the guide rod storage groove 22 (see FIG. 10) formed in the guide rod 17 of the shutter. The pair of shutters 15 and 15 are urged in a direction close to each other by the elasticity of the shutter spring 16 that is elastically mounted between the two end surfaces.
[0024]
As shown in FIG. 10, a pair of projecting portions 23 and 23 are formed at the center of the shutter storage space 12, and correspondingly, stepped portions formed at both ends of each shutter 15 are projected. The position of the shutter in the normal state is defined by contacting the portion 23.
[0025]
On the other hand, as shown in FIG. 5, an elongated inclined surface 25 is formed at the outer surface joint portion of each shutter 15, that is, a joint portion with another shutter, leaving the joint edge 24, and the key insertion hole is closed. The cross section of the hour shutter joint is V-shaped.
[0026]
Further, the joining edge 24 and the inclined surface 25 are smoothly connected by a connecting curved surface 26 having a circular cross section.
[0027]
The pair of shutters 15, 15 and the shutter springs 16, 16 configured as described above are a pair of first connection protrusions 27, 27 (see FIGS. 8 and 8) that protrude from the inner surface side of the first key guide block 71. 9) is engaged with the U-shaped first protruding piece receivers 28 and 28 (see FIGS. 10 and 12) formed on the second key guide block 72 to prevent rotation.
[0028]
Then, as shown in FIG. 10, in the state where the shutter 15 and the shutter spring 16 are fitted in the shutter storage space 12, the four second connecting protrusions 29 and 29 protruding into the shutter storage space 12 are connected to the inner cylinder. After engaging with each of the four receiving grooves 32, 32 formed along the generatrix on the outer peripheral surface of the key guide plug 31 (see FIG. 13) attached to the outer end of the outer sleeve, as described above 9 is used to secure the stopper.
[0029]
As shown in FIGS. 1 and 2, the key guide according to the embodiment of the present invention constructed as described above is normally in the key insertion hole of the key guide block 7 with the shutters 15 and 15 being elastic by the elastic force of the shutter spring 16. Needless to say, no dust or moisture enters the cylinder lock 1 at this time.
[0030]
Further, as shown in FIG. 1, a groove having a shape in which a triangular groove is continuously provided at the bottom of a V-shaped groove having a large opening angle is formed on the outer surface side of the joint portion of the shutter.
[0031]
Therefore, even a hand with a blind hand or a hand can easily join the tip of the key to the shutter when the tip of the key is applied to a shallow bowl-shaped guide surface 11 and slid to the center along the guide surface. It can guide to the groove of the part.
[0032]
After confirming that the tip of the key has fallen into the groove with the touch of the hand, push the key inward.
[0033]
Then, the shutters 15 and 15 are made elastic by the shutter spring 16 by the wedge action generated between the chamfered portion of the tip of the combined key whose tip is thinned (see FIG. 1) and the connecting curved surface 26 of the shutter 15 (see FIG. 5). As shown in FIG. 3, the key insertion hole is opened to smoothly guide the leading end of the combined key to the key hole 13.
[0034]
At this time, the guide in the width direction of the tip of the key, that is, the left-right direction in FIGS. This is done by a wedge action by sliding contact.
[0035]
When the key is completely inserted, the key guide block 7 is rotated integrally with the inner cylinder 6 in a predetermined direction when the key is rotated in the locking or unlocking direction as in a normal lock. Is done.
[0036]
After completing the locking / unlocking operation, the inner cylinder is returned to a predetermined angular position, and in this state, the key is pulled out in the same manner as a normal lock. At this time, the shutters 15 and 15 are automatically closed by the elasticity of the shutter spring. Returning to the normal state shown in FIG.
[0037]
【The invention's effect】
As is apparent from the above description, the present invention provides a slender inclined surface whose cross section forms a part of a V-shape, leaving a joint end edge when the key insertion hole is closed, at the outer joint portion of the slender block-shaped shutter. The joint edge and the inclined surface are smoothly connected by a connecting curved surface with an arc-shaped cross section, and a conical shaped guide surface is formed on the outer surface of the key guide block. By sliding the key toward the center, even a person who has difficulty with eyes or hands can easily insert the key into the keyhole.
[0038]
Further, since the shutter closes and the key insertion hole is completely closed under normal conditions, dust and moisture can be completely prevented from entering the cylinder lock, and the smooth operation of the cylinder lock can be maintained for a long time.
[0039]
Furthermore, since the picking operation cannot be performed unless the shutter is opened at the time of picking, there are various effects such as making the picking difficult by an operation of opening this shutter in addition to a rather delicate operation.
[Brief description of the drawings]
FIG. 1 is a sectional view of a cylinder lock equipped with a key guide according to an embodiment of the present invention.
FIG. 2 is a front view of a cylinder lock equipped with a key guide according to an embodiment of the present invention, showing a state in which a shutter is closed.
FIG. 3 is a front view of a cylinder lock equipped with a key guide according to an embodiment of the present invention, showing a state in which a shutter is open.
FIG. 4 is a front view of a shutter.
FIG. 5 is a side view of a shutter.
FIG. 6 is a bottom view of the shutter.
FIG. 7 is a front view of a first key guide block.
FIG. 8 is a cross-sectional view of a first key guide block.
FIG. 9 is a rear view of the first key guide block.
FIG. 10 is a front view of a second key guide block.
FIG. 11 is a cross-sectional view of a second key guide block.
FIG. 12 is a rear view of the second key guide block.
FIG. 13 is a front view of a key guide plug.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylinder lock 7 Key guide block 11 Guide surface 12 Shutter storage space 13 Key hole 14 Key insertion hole 15 Shutter 16 Shutter spring 17 Guide rod 24 Joining edge 25 Inclined surface 26 Connection curved surface 31 Key guide plug

Claims (1)

A thick rotating body attached to the outer end of the inner cylinder of the cylinder lock so as to be able to rotate integrally therewith, forming a bowl-shaped guide surface on the outer surface and a shutter storage space on the inner surface side, respectively. A key guide block having a key insertion hole having a size through which the shoulder portion of the key can pass at the center and a pair of elongated blocks extending in the longitudinal direction of the key insertion hole in the shutter storage space. In front of the outer end surface of the inner cylinder, each of the key insertion holes is guided so as to be movable between a closed position where the half of the width direction of the key insertion hole is closed and an open position where the key insertion hole is retracted, and elastically contact each other. Forming a slender inclined surface whose cross section forms a part of a V-shape, leaving a joint edge when the key insertion hole is closed, at the joint of the outer surface of each shutter. A connecting curve with an arc-shaped cross section between the edge and the inclined surface Smoothly connected by, while each shutter, a guide rod to the center in the lengthwise direction overall shape and integrally projecting molded into T-shape, fitted to the shutter housing space of key-shaped key guide block A key guide characterized by being guided in the length direction of the guide rod and having a shutter spring mounted in a spring hole formed in the guide rod .

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