JPH07150834A - Key device - Google Patents

Abstract

PURPOSE:To prevent a malfunction by an improper key by forming a keyway to one surface of a key in the longitudinal direction and forming a projection for positioning capable of being fitted into the keyway to the inner peripheral section of a tumbler. CONSTITUTION:Meandering keyways 102 are formed to the surface and rear of a key body 101 respectively in a key 100. When an improper key is inserted, the projections 48b-41b for positioning of tumblers 48-41 are slid successively into the keyways, and the tumblers 48-41 are slid in succession to the insides. Notch sections 41c-48c are not arranged on the same straight line at that time, and the projections 53 of a side bar 50 do not fall into the notch sections 41c-48c. Consequently, left and right levers 61, 62 cannot be rotated, and pawl sections 61c, 62c for engagement are not opened outward, thus preventing the engagement of the pawl sections 61c, 62c for engagement with the projections 71, 72 of a rear rotor 70. Accordingly, only the main rotor 20 is turned even when the key 100 is revolved, the rear rotor 70, a position of which is controlled by a coil spring 80, is not rotated, and the positions of the tumblers 41-48 are regulated forcibly. thus preventing a malfunction.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to key devices, and more particularly to key and tumbler configurations.

[0002]

2. Description of the Related Art Conventionally, as a key device, for example, there is a sidebar lock device described in Japanese Patent Laid-Open No. 1-299968. That is, when a proper key is inserted into the key groove of the key cylinder, the uneven portion formed on the side end surface of the key engages with the inner surface of the tumbler urged in the length direction,
Since the tumbler is pulled into the slot of the key cylinder to regulate the position, the contact portions formed on the outer peripheral edge of the tumbler are continuously aligned in a line, and the side bars are fitted to the contact portions of the aligned tumblers. To do. For this reason, the side bar moves to the inside of the outer peripheral surface of the key cylinder and becomes in the unlockable state. As a result, when the key is turned, the key cylinder rotates and the lock is released. On the other hand, when the key is not inserted into the key cylinder, the tumbler and the side bar protruding from the outer peripheral surface of the key cylinder engage with the engaging groove of the case to prevent the key cylinder from rotating.

[0003]

However, in the sidebar lock device having the above-described structure, the spring force of the tumbler spring cannot be increased so much from the viewpoint of operability, and the sidebar is moved to the tumbler side by the side spring. Being energized. Therefore, if an improper key with a similar external shape is inserted into the tumbler and the side bar is fitted even slightly into the abutting part of the slid tumbler, the side bar is pushed from the abutting part of the tumbler by the spring force of the tumbler spring. It cannot be pushed out reliably. Therefore, the amount of engagement of the side bar with the case is reduced, and in some cases, the tumbler may slide due to the component force of the side spring, and the side bar may be completely fitted to the contact portion of the tumbler. As a result, if the key cylinder is forcibly turned, the key cylinder rotates and malfunctions.

In view of the above problems, it is an object of the present invention to provide a key device capable of preventing theft without causing malfunction even if an improper key having a similar outer shape is inserted.

[0005]

In order to achieve the above-mentioned object, a key device according to the present invention inserts the key into a tumbler having a substantially square front shape slidably accommodated in a slit hole of a main rotor, By sliding and controlling the position of the tumbler, the positioning notches formed on the outer peripheral edge of the tumbler are continuously arranged, and the side bar is fitted into the arranged notches for unlocking or In a key device that can be locked, a key groove is provided on at least one surface of the front and back surfaces of the key along the length direction, and a positioning protrusion that can be fitted into the key groove is provided on an inner peripheral edge portion of the tumbler. Is provided in the. Further, among the front and back surfaces of the key, at least one surface is provided with a positioning projection along the lengthwise direction, and a positioning recess that can be fitted into the positioning projection is provided at an inner peripheral edge of the tumbler. It may be configured.

[0006]

Therefore, according to the present invention, the key groove or the positioning protrusion provided on the key engages with the positioning protrusion or the positioning recess provided on the inner peripheral edge of the tumbler, respectively, so that the tumbler slides. Position will be regulated with certainty.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment according to the present invention will be described with reference to FIGS. The sidebar lock device according to the present embodiment generally includes a tubular holder 10, a main rotor 20 rotatably housed in the tubular holder 10, and a main rotor 20.
The rear rotor 70 is assembled to the rear end of the main rotor 20 so as to be engageable with the main rotor 20, and a cap 90 for preventing the rear rotor 70 from coming off the holder 10 via a coil spring 80.

The holder 10 has a cylindrical shape capable of accommodating a main rotor 20, which will be described later, and is provided with a flange portion 12 having a key insertion hole 11 in a front opening portion, while a pair of positioning portions are arranged from both side edge portions of the rear opening portion. The arm portions 13 and 14 extend along the axis. Further, the holder 10 is
A pair of click grooves 15, 15 are provided on the upper and lower surfaces of the inner circumference. Reference numeral 16 is a locking claw portion.

The main rotor 20 has a substantially cylindrical outer shape, and has a key hole 21 into which a key 100, which will be described later, can be inserted from the front end surface of the main rotor 20 along the axis, and the upper and lower edges of the front end surface. Locking protrusions 22a and 22b for engaging a rotor cover 30 described later are provided.

Further, the main rotor 20 is provided with slit holes 23a to 23h penetrating both opposite side surfaces thereof in the radial direction and communicating with the key hole 21 at a predetermined pitch.

Further, the main rotor 20 has the key hole 21 and the slit holes 23a-23 at the center of the upper surface thereof.
There are provided recesses 24 that communicate with h, respectively, and into which side bars 50 to be described later can be fitted. Long grooves 25a, 25b for rotatably housing left and right levers 61, 62 to be described later are provided in parallel on both sides of the recess 24.

The main rotor 20 has a pair of locking projections 26a and 26b on both side edges of its rear end surface, and a cutout groove 27 is provided on the lower side thereof. Further, the main rotor 20 is provided with a fitting hole 28 on its lower surface into which the click ball 65 can be fitted via the spring 64 (FIG. 2).

The rotor cover 30 has a central hole 31 through which the key 100 can be inserted in its central portion, and cutout portions at its upper and lower edge portions which engage with the locking projections 22a and 22b of the main rotor 20, respectively. It has 32 and 33.

The slit hole 23a of the main rotor 20
The tumblers 41 to 48 having a substantially square shape on the front surface are inserted into 23h to 23h. The tumblers 41 to 48 have locking projections 41a to 48a (the rear side is not shown) at their outer peripheral lower edge portions, and positioning projections 41b to 4 at their inner peripheral edge portions.
8b (the back side is not shown), respectively, and positioning notches 41c to 48 are provided on the upper edge of the 8b.
c is provided. Further, both end surfaces of the tumblers 41 to 48 have the same curvature as the outer peripheral surface of the main rotor 20. The positioning notches 41c to 48c of the tumblers 41 to 48 are formed so as to be aligned on the same straight line when the positioning protrusions 41b to 48b are fitted in the key grooves of a predetermined key.

The side bar 50 has a plane shape that can be fitted into the recess 24, and the pressure contact projections 5 are formed from the front and rear surfaces thereof.
1, 52 extend laterally, and a protrusion 53 having a triangular cross section is provided on the lower surface thereof (FIG. 3).

The left and right levers 61 and 62 are formed by projecting a pair of tongue portions 61a and 61b and 62a and 62b inward, respectively.
And 62c and extended portions 61d and 62d for holding the lever spring 63, respectively. The distance from the rotation axis of the left and right levers 61 and 62 to the point of action of locking claws 61c and 62c that are locked to the rear rotor 70, which will be described later, is the rotation axis of the left and right levers 61 and 62. It is longer than the distance from the heart to the action points of the tongue portions 61a, 61b and 62a, 62b that bias the side bar 50.

The rear rotor 70 is the main rotor 20.
As shown in FIG. 3, a pair of locking projections 71 and 72 are provided on the front inner peripheral surface so as to be fitted to the rear end portion, and the connecting shaft portion is provided at the central portion of the rear end surface. 73 is projected, an annular projection 74 is projected so as to surround the outer peripheral surface thereof, and an annular groove 75 capable of accommodating the coil spring 80 is formed.

Next, a method of assembling the present embodiment, which comprises the above-mentioned components, will be described. First, the main rotor 2
The notch 32, 33 of the rotor cover 30 is engaged with the locking projections 22a, 22b of 0 to cover the front opening of the key hole 21.

Then, the tumbler 4 is inserted into the slit holes 23a to 23h of the main rotor 20 through the spring 40.
1 to 48 are slidably inserted alternately from both sides.

Next, the recess 24 of the main rotor 20
The sidebar 50 is fitted to the left and right levers 61 and 62 respectively rotatably housed in the long grooves 25a and 25b, and the spring 63 is arranged in the cutout groove 27 of the main rotor 20 to extend the extended portion. Push 61d and 62d outward. This allows the tongues 61a, 61b and 62a,
62b presses the protrusions 51 and 52 of the sidebar 50 from above, and urges the sidebar 50 downward.

Further, the fitting hole 2 of the main rotor 20
After the click ball 65 is attached to the spring 8 via the spring 64, the main rotor 20 is housed in the holder 10. As a result, the outer end surfaces of the tumblers 41 to 48, which are slidably inserted into the slit holes 23 a to 23 h and are urged outward by the spring force of the spring 40, come into pressure contact with the inner peripheral surface of the holder 10.

On the other hand, the coil sprig 80 is installed in the annular groove 75 of the rear rotor 70 to fit the annular cap 90, and then the rear rotor 70 is fitted to the rear end portion of the main rotor 20 housed in the holder 10.
The engagement work is completed by engaging the engagement hole 92 of the retaining portion 91 extending from the annular cap 90 with the locking claw portion 16 of the holder 10 to prevent the engagement.

When the assembling work is completed, both end portions 81 and 82 of the coil spring 80 are locked to the notched edge portions 93 and 94 of the annular cap 90 to prevent the rear rotor 70 from rattling.

Further, as shown in FIGS. 1 and 4, the key 100 according to the present embodiment is provided with a key groove 102 (a key groove 102 on the back side is not shown) meandering on the front and back surfaces of a key body 101. The projections 41b to 48 for positioning the tumblers 41 to 48 are provided on the front and back surfaces of the tip portion.
A guide groove 103 having a substantially triangular plane is formed in order to facilitate engagement with b. Further, the tip portion of the key body 101 is formed with a pair of tapered surfaces 104, 104 to facilitate insertion into the tumblers 41 to 48, and is a pointed portion.

Next, the operation of the sidebar lock device according to this embodiment will be described. First, the proper key 100
From the central hole 31 of the rotor cover 30 to the main rotor 20.
When inserted into the key hole 21 of the tumbler 48, the tapered surfaces 104, 104 press the inner peripheral edge of the tumbler 48.
The tumbler 48 slides inward against the spring force of 0,
Then, the protrusion 4 of the tumbler 48 is inserted through the guide groove 103.
8b (not shown) slides into the keyway 102, and the tumbler 48 slides accordingly.

Further, when the key 100 is pushed in, the tapered surfaces 104, 104 and the guide groove 103 are formed in the same manner as described above.
Through the positioning protrusion 47b of the tumbler 47-41
41b slides into the key groove 102, whereby the tumblers 47 to 41 slide inward one after another. Then, when the insertion of the key 100 is completed, the positioning protrusions 48b to 41b of the tumblers 48 to 41 are positioned at predetermined positions of the key groove 102 that meanders, and the position restricting notches 41c to 48c of the tumblers 41 to 48 are formed. Line up on the same line. Therefore, the protrusions 53 of the side bar 50, which are urged downward by the left and right levers 61 and 62, cause the tumblers 41 to 41 to move.
It falls into the notches 48 of 48. As a result, as shown in FIG. 3, the left and right levers 61 and 62 rotate outward, and the locking claws 61c and 62c move to the rear rotor 70.
To the projections 71 and 72, respectively.

When the key 100 is rotated against the spring force of the coil spring 80, the rear rotor 70 is rotated via the locking claw portions 61c and 62c of the left and right levers 61 and 62,
Other components (not shown) connected to the shaft portion 73 are driven to release the lock, and when the predetermined position is reached, the click ball 65 engages with the click groove portions 15 and 15 to obtain a desired click feeling. Is obtained.

According to this embodiment, the left and right levers 6 are
The distance from the rotation axis of the first and second levers 62 to the action points of the locking claw portions 61c and 62c that locks the rear rotor 70 is such that the side bar 50 is urged from the rotation axes of the left and right levers 61 and 62. The tongue portions 61a, 61b and 62a, 62b are longer than the distance to the point of action. Therefore, even if the movement amounts of the tongue portions 61a, 61b and 62a, 62b are small, the locking claw portions 61c, 62c of the left and right levers 61, 62 are locked to the protrusions 71, 72 of the rear rotor 70. Since the amount is large and it can be engaged and disengaged reliably, there is an effect that a malfunction can be prevented.

Next, when an improper key is inserted, the positioning protrusions 48b to 41b of the tumblers 48 to 41 are sequentially slid into the key groove of the improper key, and the tumblers 48 to 41 are inwardly moved, as described above. Slide sequentially. However, in this case, since the cutout portions 41c to 48c are not aligned on the same straight line, the protrusion 53 of the sidebar 50 does not fall into the cutout portions 41c to 48c. Therefore, the left and right levers 61 and 62 cannot rotate, and the locking claws 61c and 62 cannot be rotated.
Since c does not open outward, the locking claws 61c and 62c cannot be locked to the protrusions 71 and 72 of the rear rotor 70. As a result, even when the key 100 is rotated, only the main rotor 20 rotates, and the rear rotor 70 whose position is regulated by the coil spring 80 does not rotate.

In particular, according to this embodiment, when an improper key is inserted into the tumblers 41 to 48, the key grooves of the improper keys will cause the positioning protrusions 41b to 48 of the tumblers 41 to 48.
The tumblers 41 to 48 are forcibly regulated in position by fitting with b. Therefore, the ridge 53 of the sidebar 50 is attached to the tumbler 4
Since the cutout portions 41c to 48c of 1 to 48 are surely pushed out, malfunctions due to improper keys can be prevented.

Further, even if the tip end of the driver is inserted into the key hole 21 of the main rotor 20 and forcedly rotated, the outer end faces of the tumblers 41 to 48 are merely in pressure contact with the inner peripheral face of the holder 10. , Same as above, main rotor 2
Only 0 idles, so theft due to so-called heavy load destruction can be prevented. Furthermore, according to the present embodiment, since a high load is not applied to the main rotor, there is an advantage that the main rotor and the like can be molded with a resin material and the production cost can be reduced.

Incidentally, in the above-mentioned embodiment, the tumblers 41-41.
The case where the positioning notches 41c to 48c of 48 are arranged on the same straight line has been described, but the present invention is not limited to this, and they may meander. However, in this case, it goes without saying that the ridge 53 of the sidebar 50 also needs to meander.

Further, in the above embodiment, the spring 40
Although the tumblers 41 to 48 are urged outward by the above, it is not always necessary to provide the spring 40, and in this case,
The number of parts and the number of assembly steps can be reduced. In particular,
If the spring 40 is omitted, the positions of the notches for positioning are made different, and if the tumblers having exactly the same shape as the others are used, all the tumblers are arranged in a line by removing the key. Has the advantage that the internal structure cannot be read.

[0034]

As is apparent from the above description, according to the key device of the present invention, when an improper key having a similar outer shape is inserted, the key groove or the positioning protrusion of the key is The tumbler is forcibly slid by being fitted into a positioning projection or a positioning recess provided on the inner peripheral edge of the tumbler. For this reason, the side bar can be reliably pushed out from the positioning cutout portion of the tumbler, so that malfunction due to an improper key can be prevented,
Can prevent theft. Further, according to the present invention, since it is only necessary to provide one key groove on at least one side of the key, unlike the conventional key, the sectional area becomes uniform, the key is less likely to be damaged, and the key is processed. This is advantageous in that it can be manufactured at low cost because it requires only one process, productivity is improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a key device according to the present invention.

FIG. 2 is an exploded sectional view of an essential part of the working row.

FIG. 3 is a sectional view of an essential part of the working row.

FIG. 4 is a plan view of a key according to the working row.

[Explanation of symbols]

10 ... Holder, 20 ... Main rotor, 40 ... Spring, 41-48 ... Tumbler, 41b-48b ... Positioning protrusion, 41c-48c ... Positioning notch, 50 ...
Side bars, 61, 62 ... Left and right levers, 61a, 61
b, 62a, 62b ... Tongue portion, 61c, 62c ... Locking claw portion, 70 ... Rear rotor, 71, 72 ... Protrusion, 100 ... Key, 101 ... Key body, 102 ... Key groove, 103 ... Guide groove, 104 ... Tapered surface.

Claims (2)

[Claims] 1. A key is inserted into a tumbler having a substantially square shape on the front face that is slidably accommodated in a slit hole of a main rotor, and the tumbler is slid to regulate the position, whereby the tumbler is formed on an outer peripheral edge portion of the tumbler. In the key device in which the positioning notches are continuously arranged and the side bar is fitted to the arranged notches for unlocking or locking, at least one of the front and back surfaces of the key is The key device is provided with a key groove along the lengthwise direction, and a positioning projection capable of being fitted into the key groove is provided on the inner peripheral edge of the tumbler. 2. A key is inserted into a substantially square-shaped tumbler on the front face that is slidably accommodated in a slit hole of a main rotor, and the tumbler is slid to regulate the position, thereby forming the tumbler on an outer peripheral edge portion. In the key device in which the positioning notches are continuously arranged and the side bar is fitted to the arranged notches for unlocking or locking, at least one of the front and back surfaces of the key is A key device, wherein a positioning projection is provided along the lengthwise direction, and a positioning recess that can be fitted into the positioning projection is provided at an inner peripheral edge of the tumbler.