JPH07150830A - Free wheel type cylinder lock - Google Patents

Abstract

PURPOSE:To prevent burglary by high-load breakdown. CONSTITUTION:When a key 100 is inserted into the key hole of a main rotor 20, projections protruded to the underside of a side bar 50 are fitted into notch sections 41c-48c for positioning in tumblers 41-48 arranged on the same straight line, and the side bar 50 falls into the main rotor 20. Consequently, left and right levers 61, 62 energizing the projecting sections 51, 52 of the side bar 50 to the lower sides by tongue sections 61a, 61b and 62a, 62b are rotated, the pawl sections 61c, 62c for engagement of the left and right levers 61, 62 are engaged with projections protruded to the front inner circumferential surface of a rear rotor 70, and the rear rotor 70 is tuned while being interlocked with the revolution of the main rotor 20 when the key 100 is revolved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freewheel type cylinder lock used for automobile and household door lock devices.

[0002]

2. Description of the Related Art Generally, cylinder locks are used in automobile and household door lock devices. The cylinder lock is composed of a cylinder and a rotor provided in the cylinder. The rotor can rotate in the cylinder by inserting an appropriate key (match key). When the key is not inserted in the rotor, or when an improper key (unmatch key) or tool is inserted, the tumbler protruding from the rotor engages with the engagement receiving portion formed on the inner peripheral surface of the cylinder. Therefore, the rotor cannot rotate. A key lever is connected to the rear end of the rotor, and the door lock device is driven via a rod connected to the key lever.

[0003]

However, in the above-mentioned conventional cylinder lock, if an unmatched key or a tool is inserted into the rotor and the tumbler is destroyed by applying a large load, the rotor will be allowed to rotate and the door lock will be released. As a result of the state being released, there was a problem that it was easy to get stolen. In view of the above problems, it is an object of the present invention to provide a freewheel type cylinder lock capable of preventing theft due to high load destruction.

[0004]

In order to achieve the above object, a freewheel type cylinder lock according to the present invention communicates with a key hole formed in the axial direction and has a plurality of slit holes provided in the radial direction. And a main rotor having a recess communicating with the slit hole and the key hole, and a positioning notch at the upper end edge, and a front view that is slidably housed in the slit hole of the main rotor. A square-shaped tumbler, a side bar that has a lower surface that can be fitted into the positioning notch of the tumbler, is fitted into the recess of the main rotor, and is biased toward the tumbler; The rear rotor is engaged with the main rotor via the engaging means that is interlocked with the operation of the sidebar, and when a proper key is not inserted in the key hole of the main rotor, Even if the rotor rotates, the rear rotor does not rotate, and when a proper key is inserted into the key hole of the main rotor, the side bar fits into the positioning notch of the aligned tumblers. The main rotor engages with the rear rotor via the interlocking engagement means, and the rear rotor rotates in conjunction with the rotation of the main rotor.

[0005]

Therefore, according to the present invention, even if the main rotor is forcedly rotated by inserting an improper key or the like, the rear rotor does not rotate and only the main rotor idles.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings of FIGS. The freewheel type cylinder lock according to the present embodiment generally includes a cylindrical holder 10.
A main rotor 20 rotatably housed in the tubular holder 10, a rear rotor 70 assembled to the rear end of the main rotor 20 so as to be engageable with the main rotor 20, and the rear rotor 70 via the coil spring 80. It is composed of a cap 90 that prevents the cap 10 from coming off.

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, and a pair of positioning portions from both side edge portions of the rear opening portion. The arm portions 13 and 14 extend along the axis, and the holder 10 is provided with a pair of click groove portions 15 and 15 on the upper and lower inner peripheral surfaces thereof. 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 described later can be inserted from the front end surface thereof along the axis, and the upper and lower edges of the front end surface thereof. 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 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, 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 at its central portion, and cutout portions at its upper and lower edges which engage with the locking projections 22a and 22b of the main rotor 20, respectively. It has 32 and 33. Although not specifically shown, the main rotor 20 is provided with a shutter biased by a spring in a direction to close the central hole 31 of the rotor cover 30 so as to shield rainwater and dust.

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

Each of the left and right levers 61 and 62 has a pair of tongue portions 61a and 61b and 62a and 62b protruding inwardly, 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 assembling the click ball 65 with 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 incorporated into 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 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 ends 81 and 82 of the coil spring 80 are locked to the notched edges 93 and 94 of the annular cap 90 to prevent the rear rotor 70 from rattling.

Further, as shown in FIG. 1, the key 100 used in this embodiment has a key body 102 having a meandering key groove 102 (a key groove 102 on the back side is not shown) that meanders. It has a tumbler 41 at its tip.
In order to facilitate the engagement with the positioning protrusions 41b to 48b of 48 to 48, a guide groove 103 having a substantially triangular plane is formed.

Next, the operation of the freewheel type cylinder lock according to this embodiment will be described. First, when a proper key 100 is inserted into the key hole 21 of the main rotor 20 from the central hole 31 of the rotor cover 30, the protrusion 48b (not shown) of the tumbler 48 is inserted into the key groove 1 through the guide groove 103.
02, and the tumbler 48 slides inward against the spring force of the spring 40.

Further, when the key 100 is pushed in, the positioning protrusions 47b to 47b of the tumblers 47 to 41 are similarly moved as described above.
41b slides into the key groove 102, whereby the tumblers 47 to 41 are sequentially moved inward. And key 10
When the insertion of 0 is completed, the positioning protrusions 48b to 41b of the tumblers 48 to 41 are positioned at predetermined positions of the key groove 102 meandering, and the position restricting cutout portions 41c to 48c of the tumblers 41 to 48 are the same. Line up on a straight line. Therefore, the protrusion 53 of the side bar 50, which is urged downward by the left and right levers 61 and 62, falls into the cutout portions 41c to 48c of the tumblers 41 to 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 are locked to the protrusions 71 and 72 of the rear rotor 70, respectively.

When the key 100 is rotated against the spring force of the coil spring 80, the rear rotor 70 rotates 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.

Then, when an improper key is inserted, the positioning protrusions 48b to 41b of the tumblers 48 to 41 are successively slid into the key grooves 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.

Further, even if the tip 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 rotates idly, and it is possible to prevent theft due to forced rotation. Furthermore, according to the present embodiment, since a high load due to the forced rotation 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, the protrusions 53 of the side bar 50 also need to meander similarly.

[0031]

As is apparent from the above description, according to the free wheel type cylinder lock of the present invention, the tumbler does not slide to the predetermined position when an improper key or the like is inserted into the key hole of the main rotor. Therefore, the side bar cannot fit into the positioning cutout portion of the tumbler. For this reason, since the engagement means cannot engage the main rotor with the rear rotor, even if an improper key is inserted into the main rotor and forcedly rotated, only the main rotor rotates and the rear rotor does not rotate. As a result, unlocking due to destruction as in the conventional example becomes impossible, and there is an effect that theft can be prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a freewheel type cylinder lock 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.

[Explanation of symbols]

10 ... Holder, 20 ... Main rotor, 21 ... Key hole,
23a to 23h ... Slit holes, 24 ... Recesses, 41 to 48
... Tumbler, 41b to 48b ... Positioning protrusion, 41c
~ 48c ... Notch for positioning, 50 ... Side bar, 5
3 ... ridges, 61, 62 ... left and right levers, 61a, 61
b, 62a, 62b ... tongue portion, 61c, 62c ... locking claw portion, 70 ... rear rotor, 71, 72 ... projection, 100 ... key, 102 ... keyway.

Claims (1)

[Claims] 1. A main rotor that has a plurality of slit holes that communicate with a key hole formed in the axial direction and that are provided in the radial direction, and that has a recess that communicates with the slit hole and the key hole. It has a positioning notch at the upper edge and has a substantially square front tumbler that is slidably accommodated in the slit hole of the main rotor, and a lower surface that can be fitted into the positioning notch of the tumbler. And a rear rotor engaged with the main rotor via a side bar fitted in the recess of the main rotor and biased toward the tumbler side, and an engagement means interlocking with the operation of the side bar. When the proper key is not inserted in the key hole of the main rotor, the rear rotor does not rotate even if the main rotor rotates, and the proper key is inserted in the key hole of the main rotor. When the sidebars are inserted, the sidebars are fitted into the positioning cutouts of the aligned tumblers, and the main rotor is engaged with the rear rotor via the engaging means that interlocks with the sidebars to interlock with the rotation of the main rotor. Freewheel cylinder lock characterized by rotating rear rotor.