JPH0739774B2 - Sidebar cylinder lock - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sidebar type cylinder lock having a novel structure, which is used for steering locks for automobiles and other lock devices.

[0002]

2. Description of the Related Art Conventionally, a sidebar type cylinder lock is disclosed in Japanese Utility Model Laid-Open No. 61-9468 and JP-A-1-278668.
No. 3,080,744 and the like. In these conventional sidebar type cylinder locks, many types of tumblers necessary to form a key type are manufactured, and a tumbler suitable for the key type is selected from the tumblers and incorporated into a rotor. Then, by inserting the key, the grooves on the side of the tumbler that fit with the side bar are aligned, and the plate or rod-shaped side bar can be pushed into the groove, which disengages the cylinder and rotates the rotor. It was possible.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-mentioned conventional sidebar type cylinder lock, A. A large number of types of tumblers with different positions of the recesses into which the sidebars fit are required, and the cost required for manufacturing and managing the tumblers is high. B. When assembling the tumbler into the rotor, it is necessary to select and assemble a tumbler suitable for the key mountain. C. The rotor with the tumbler assembled must be managed in correspondence with the key that matches the tumbler. There were problems such as.

[0004]

SUMMARY OF THE INVENTION The present invention uses multiple tumblers of one type, the sidebar having a groove shaped like a corrugated keyway formed in the key fits into a recess on the outer side of the tumbler. It is characterized by doing so.
That is, the present invention provides a cylinder lock in which a sidebar (11) is provided between the cylinder (13) and the rotor (6), and the sidebar is moved into the rotor by inserting a key so that the rotor can rotate. , A corrugated key groove (16) is formed in the plate-shaped key (15), and a protrusion (4) fitted into the key groove (16) is provided at one side of the central key hole (3). , A plurality of tumblers (5) having the same shape, each having a protrusion (1) having the same shape as the protrusion on the outer side, are inserted into the tumbler groove (7) of the rotor (6),
When the key (15) is inserted into the key hole (3) of the tumbler when the same corrugated recess (10) as the key groove (16) is formed on the inner surface of the side bar (11), the outer side of the tumbler is removed. A sidebar type cylinder lock characterized in that a corrugated convex portion formed by the convex portion (1) can be fitted with a corrugated concave portion (10) on the inner surface of the sidebar.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIGS. 1 and 2, the present invention is provided with a convex portion (1) at the center of the cutout portion at the center of the outer side portion, and a key hole (3) is formed at the central portion thereof. (3) On one side,
A number of tumblers (5) with protrusions (4) that fit into the corrugated keyways (16) are inserted into the tumbler grooves (7) of the rotor (6), said tumbler grooves being on the sides of the rotor (6). A linear side groove (8) along the axial direction of the rotor is provided at a position orthogonal to (7), and in the side groove (8),
A sidebar (11) having a linear arcuate portion (9) on the outer surface and a corrugated recess (10) having the same shape as the key groove (16) fitted on the protruding portion (1) of the tumbler on the inner surface is a spring (1).
2) (see FIG. 2), and is always biased outward,
An arc groove (14) into which the linear arc portion (9) at the tip of the side bar is shallowly fitted is provided at a position corresponding to the side groove (8) on the inner circumference of the cylinder (3), and the key hole (3) of each tumbler is provided. When the key is inserted into the), a corrugated recess (10) having the same shape as the key groove on the inner surface of the side bar (11) can be fitted into the corrugated projection formed by the large number of projections (1) on the outer side of each tumbler. It is a sidebar type cylinder lock configured in. In the above embodiment, the cutout portion (2) is provided on the outer side of the tumbler, and the convex portion (1) having the same height as the outer side surface of the tumbler is provided on the central portion of the cutout portion. A protrusion having the same shape as the key groove (16) having a width that fits in the side bar (11) may be provided on the inner surface of the side bar (11).

5 and 6 (20) is a cylindrical spring having a C-shaped cross section that fits snugly on the outer peripheral surface of the rotor (6). The rotor is provided at the center in the longitudinal direction according to the pitch of the tumbler. A tumbler holding spring (21) having a C-shaped cross section with a diameter smaller than the outer diameter is integrally formed. In addition, (22) is a support projection bent and formed on each mounting root of the tumbler holding spring (21), and (23) is a holding piece bent and formed on the tip of the tubular spring (20).

On the other hand, in order to fit the cylindrical spring (20) into the rotor (6), the outer peripheral portion of the rotor (6) has an outer periphery corresponding to the thickness of the cylindrical spring (20) as shown in FIG. A cut (24) into which the support protrusion (22) can be inserted is provided on the side opposite to the side groove (8), and the holding groove (25) into which the holding piece (23) at the tip of the tubular spring is fitted is formed on the side groove (8). 8) Provided on both sides.

[0008] Further, in both openings of each tumbler groove (7), the tumbler holding springs (21) are fitted sideways so that a sham (26) can hold both ends of the tumbler (5) from both sides. It is provided. Therefore, after inserting the tumbler (5) into the tumbler groove (7) of the rotor (6), the tubular spring (20) is fitted to the outer peripheral portion of the rotor as shown in FIGS. 5) will be held in the central position of the tumbler groove (7) as shown in FIG. When the key (17) is inserted in this state, the tumbler (5) moves up and down while both ends are supported by the tumbler holding springs (21), and when the key is removed, the original state is restored.

[0009]

In the present invention, a plurality of tumblers (5) having the same shape are inserted into the tumbler groove (7) of the rotor,
When the key (15) is inserted, a large number of protrusions (1) on the outer side of each tumbler form a waveform along the key groove (16) as shown in FIG. On the other hand, the inner surface of the side bar (11) is provided with a corrugated concave portion (10) having the same shape as the key groove (18), so that when the key is properly inserted, each convex portion (1) of the tumbler and the side bar are formed. If the corrugated recesses (10) are positioned so that they fit together, the side bar arc (9) and the cylinder arc groove (4) when the key (15) is rotated.
The side bar (11) is pushed inward by the action of, and the corrugated concave portion (10) fits into the convex portion (1) of the tumbler,
Since the sidebar (11) is immersed in the rotor (6), the rotor (6) can rotate. Meanwhile, the key (15)
If you do not insert the key, or if you insert a key other than the regular key, the convex part (1) on the outer side of the tumbler does not match the corrugated concave part (10) on the inner surface of the sidebar, so rotate the key. However, the sidebar (11) does not sink into the rotor and the rotor cannot rotate. Further, when the cylindrical spring (20) is provided on the outer circumference of the rotor, each tumbler is stably held at the intermediate position of the tumbler by the tumbler holding spring (21), so that rattling due to vibration does not occur and the tumbler does not occur. The erosion of that is gone.

[0010]

According to the present invention, only one kind of tumbler may be used, and the shape of the corrugated concave portion on the inner surface of the side bar which fits the convex portion (1) on the outer side of the tumbler may be the same as that of the key groove (16). Therefore, it is convenient because the key groove can be formed by the same processing means. Also, the fact that only one type of tumbler is required means that parts management is easy, automation of tumbler incorporation and batching are possible, and this greatly contributes to cost reduction. Further, when the tubular spring is equipped, rattling of the tumbler can be prevented and abrasion can be prevented, so that the durability of the tumbler is increased and the reliable function can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an example of a sidebar type cylinder lock according to the present invention.

FIG. 2 is a longitudinal sectional view of an example of a sidebar type cylinder lock according to the present invention.

FIG. 3 Inside view of the sidebar

[Figure 4] Front view of the key

FIG. 5 is a front view of a tubular spring.

FIG. 6 is a side view of the tubular spring.

FIG. 7 is a cross-sectional view of the present invention when equipped with a cylinder lock spring.

FIG. 8 is a partial vertical cross-sectional view of the present invention equipped with a tubular spring.

[Explanation of symbols]

1 convex part 3 key hole 4
Protrusion 5 Tumbler 6 Rotor 7
Tumbler groove 10 Corrugated recess 11 Side bar 13
Cylinder 15 Key 16 Keyway 20
Cylindrical spring 21 Tumbler holding spring

Claims (2)

[Claims] 1. A cylinder lock in which a side bar (11) is provided between a cylinder (13) and a rotor (6), and the side bar is moved into the rotor by inserting a key so that the rotor can rotate. A corrugated key groove (16) is formed on the plate-shaped key (15), and a protrusion (4) fitted into the key groove (16) is provided on one side of the central key hole (3). Insert a plurality of tumblers (5) of the same shape having a protrusion (1) having the same shape as the protrusion on the outer side into the tumbler groove (7) of the rotor (6), while the inner surface of the side bar (11) On the keyway (16)
When the key (15) is inserted into the key hole (3) of the tumbler, the same wavy concave portion (10) is formed as the wavy convex portion formed by the plurality of convex portions (1) on the outer side of the tumbler. A sidebar type cylinder lock characterized in that the corrugated concave portion (10) on the inner surface of the sidebar can be fitted therein. 2. A tumbler holding spring (21) having a comb-like shape and a C-shaped cross section having a diameter smaller than the outer peripheral diameter of the rotor at a position corresponding to each tumbler (5) in the central portion in the longitudinal direction according to claim 1. A cylindrical spring (20) with a C-shaped cross section,
Fitted on the outer circumference of the rotor (6), each tumbler (5)
Is held in the center of the tumbler groove (7) by the tumbler holding spring (21), a sidebar type cylinder lock.