JPH06517Y2 - Cylinder lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cylinder lock mounted on a vehicle door or the like.

(Prior Art and Problems Thereof) Generally, in a cylinder lock mounted on a vehicle door or the like, an outer wall surface of the door is inclined for design reasons.
The tip end side, that is, the end side from the key insertion hole side is mounted in an inclined posture so that it is located on the ground side (lower side). Therefore, there is a problem that rainwater or the like is inserted into the inside of the key insertion hole beyond the shutter plate that opens and closes the hole, and collects in the outer cylinder from the tumbler storage hole of the inner cylinder.

In order to solve such a problem, conventionally, the tumbler engagement / disengagement groove of the outer cylinder is removed, and a water drain hole is formed in the rear of the groove so that rainwater or the like that has entered the outer cylinder is discharged to the outside through the water drain hole. Was there. In this conventional configuration, in order to have a stopper function for restricting the protruding limit position of the tumbler and a function for preventing dust and the like from entering the inside, the tumbler engaging / disengaging groove is not provided with a hole and the tumbler of the outer cylinder is not provided. Since the engagement / disengagement groove is removed and a water drainage hole is formed in the rear of the engagement / disengagement groove, the axial length of the outer cylinder is increased by an amount sufficient to secure a space for removing the tumbler engagement / disengagement groove and projecting the water removal hole in the rear thereof. There is a need. Therefore, the entire cylinder lock is enlarged in the axial direction by that amount, and it is particularly required when the cylinder lock is attached to a thin door such as a door of a vehicle's tail gate or trunk lid. This has been a major obstacle in reducing the size of the cylinder lock in the axial direction.

(Object of the Invention) The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a cylinder lock capable of efficiently draining rainwater or the like that has entered the inside to the outside without increasing the size in the axial direction. To aim.

(Means for Solving Problems) In order to solve the above problems, in the present invention, the widthwise substantially central portion is left at the bottom of the lower engagement groove within the range in which the tumbler is engaged and disengaged in the axial direction. The drainage hole having the same width as the width of the engagement / disengagement groove is formed.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
The figure is a partially cutaway side view of the cylinder lock of the present invention.
Indicates the entire cylinder lock, the cylinder lock 1 is an outer cylinder 2,
It has an inner cylinder 3 rotatably fitted in the outer cylinder 2. Engaging and disengaging grooves 4, 5 into which upper and lower portions of the inner peripheral surface of the outer cylinder 2 are disengageably engaged with a tumbler described later along the axial direction thereof.
Are formed (see FIG. 2). On the bottom end side of the lower engagement / disengagement groove 5, as shown in FIG. 1, a drain hole having the same width as the width of the engagement / disengagement groove 5 is left in the range in which the tumbler is engaged and disengaged in the axial direction. 6 and 6 are drilled. A front drainage hole 7 is also formed in the lower peripheral wall of the front end portion of the outer cylinder 2. The front drainage hole 7 is disposed between the tip flange portion 2a of the outer cylinder 2 and the tip portion of the lower engaging / disengaging groove 5. A key guide groove 8 having a sectional shape shown in FIG. 2 is formed in the inner cylinder 3 along the axial direction. The inner cylinder 3 is formed with a plurality of tumbler housing holes 9 which are axially spaced from each other and pass through in the radial direction. A tumbler 10 is slidably housed in these housing holes 9. These tumblers 10 are the inner cylinder 3
Has a key insertion hole 10a communicating with the key guide groove 8 of FIG. Each tumbler 10 is urged by a spring 11 so that its lower end engages with the lower engagement / disengagement groove 5. When the lower ends of the tumblers 10 are engaged with the lower engagement / disengagement grooves 5 (the states shown in FIGS. 1 and 2), the inner cylinder 3 cannot rotate in the outer cylinder 2.

(Operation) The cylinder lock 1 configured as described above is mounted on a vehicle door or the like with the upper engagement / disengagement groove 4 facing upward and the lower engagement / disengagement groove 5 facing toward the ground. In the mounted state, it penetrates into the lower engagement / disengagement groove 5 of the outer cylinder 2 from the key insertion hole of the inner cylinder 3 over the shutter plate (neither of which is shown) through the key guide groove 8 and the tumbler housing hole 9. The rainwater or the like is efficiently drained to the outside through the drainage holes 6 and 6 on the bottom end side of the lower engaging / disengaging groove 5.
In addition, rainwater and the like that have entered between the inner peripheral surface of the outer cylinder 2 on the distal end side and the outer peripheral surface of the inner cylinder 3 on the distal end side are efficiently drained to the outside through the drain holes 7.

If the drainage holes are simply bored without considering the formation site, width, etc., the following problems occur.

That is, when the drainage hole is formed without leaving the substantially central portion in the width direction of the bottom of the engagement / disengagement groove 5, if the width (area) of the drainage hole is increased, the tumbler falls off, so the width cannot be increased. Further, when viewed from the axial direction, the tumbler is in a state of closing the water drain hole, and moreover, the water drain hole is in the state of being divided in the axial direction by the tumbler, so that the water flow is deteriorated.

Further, the downward flow of water on the side of the tumbler becomes poor, and dust is likely to accumulate. Therefore, when the drain hole is formed without leaving the substantially central portion in the width direction of the bottom of the engagement / disengagement groove, the drainage efficiency is deteriorated and dust is collected.

However, in the case of the present invention, since the drainage hole having the same width as the width of the engagement / disengagement groove is formed in the bottom portion of the engagement / disengagement groove, the area of the drainage hole does not fall off. Can be made as large as possible, the drainage hole is not blocked by the tumbler, and there is no axial division, and the water flow is good. The flow is good, dust is hard to collect, and drainage efficiency is good.

The locking and unlocking action is the same as the conventional one. When a key (not shown) is inserted into the key guide groove 8 of the inner cylinder 3, each tumbler 10 is moved upward against the biasing force of the spring 11 by the key. Then, the lower end thereof is disengaged from the lower engagement / disengagement groove 5, the tumbler 10 is housed within the diameter of the inner cylinder 3, and the inner cylinder 3 is
It can be rotated inside. In this state, if the inner cylinder 3 is rotated in one direction (clockwise in FIG. 2) by a key operation, it becomes a locked state, and in the locked state, the inner cylinder 3 can be rotated in the other direction by a key operation. If it is unlocked.

In the above embodiment, the drainage holes 6 and 6 are formed at the bottom end side of the lower engaging / disengaging groove 5, but the present invention is not limited to this. You may form the water drainage hole of the length over the whole longitudinal direction on both sides, leaving a substantially central part.

(Effects of the Invention) As described in detail above, according to the cylinder lock of the present invention, it is not necessary to secure a space for forming a drainage hole on the distal side of the engagement / disengagement groove of the outer cylinder, and the overall shape is axially enlarged. Without doing so, the rainwater and the like can be efficiently drained to the outside by invading the inside, and there is a peculiar effect that dust is not accumulated.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a partially cutaway side view of a cylinder lock, Fig. 2 is a sectional view taken along line II-II of Fig. 1, and Fig. 3 is III of Fig. 1. FIG. 7 is a view taken along the line III-III. 2 ... Outer cylinder, 4, 5 ... Engagement groove, 6 ... Drain hole, 10 ... Tumbler.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuro Yamashita 3700 Wadayama, Shimonaka, Sadowara-cho, Miyazaki-gun, Miyazaki Prefecture Honda Rock Co., Ltd. Character Wadayama 3700 Address Honda Lock Co., Ltd. (56) Reference Japanese Patent Laid-Open No. 59-24077 (JP, A) Seki 48-111596 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A cylinder lock mounted on a vehicle such that a lower engagement / disengagement groove of a tumbler provided in an outer cylinder is directed toward the ground, and the engagement / disengagement groove of the tumbler is axially disengaged. A cylinder lock characterized in that a water draining hole having the same width as the width of the engaging / disengaging groove is formed in the bottom portion, leaving a substantially central portion in the width direction.