JPH10205183A - Automotive key cylinder - Google Patents

Abstract

(57) [Problem] To provide a key cylinder capable of improving the waterproofness of a tumbler part and the antitheft property. SOLUTION: A large-diameter hole portion 15 having an opening at a front end and having a drain hole 21a at a lower portion, and tumbler grooves 5a at upper and lower portions behind the large-diameter hole portion.
A hollow case 5 having a small-diameter hole portion 19 having a hole 5b and fixed substantially horizontally, and a cylinder head 2 fitted into the case 5
And a cylinder 7 having a tumbler portion 27, and a tumbler groove 5b side and a drain hole 21 are provided at the front end of the small-diameter hole portion 19.
a weir portion 15c for partitioning the large-diameter hole portion 15c is provided at the front end of the weir portion 15c.
The upper half portion is deeper than the lower half portion, and circumferential stopper surfaces 17 are provided at the upper right and left ends of the sealing surface 15a. An arc-shaped back surface of the cylinder head 25 is opposed to the sealing surface 15a and longer than the sealing surface 15a. It is characterized in that a sealing surface 25a is provided, and a stopper surface 25b which comes into contact with the stopper surface 17 when the cylinder rotates is provided above the cylinder head 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key cylinder for an automobile, and more particularly, to a drainage and anti-theft structure thereof.

[0002]

2. Description of the Related Art A conventional key cylinder is disclosed, for example, in Japanese Utility Model Laid-Open Publication No. 3-76970.

[0003]

In this key cylinder, the lower tumbler groove provided on the inner periphery of the case communicates with the end face of the case where the key plate is inserted.
There is a possibility that water that has a drain hole but cannot be removed may enter the tumbler. When water enters the tumbler, problems such as difficulty in unlocking and locking due to freezing and rust may occur.

[0004] Therefore, an object of the present invention is to provide a key cylinder capable of improving the waterproofness of the tumbler part and the antitheft property.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a large-diameter hole having an opening at a front end and a drain hole at a lower portion, and a depth of the large-diameter hole. A hollow cylindrical case fixed to the vehicle body panel side so as to extend concentrically adjacent to and having a tumbler engaging groove in the upper and lower portions and to have these holes extend substantially horizontally, a key plate hole and A cylinder having a tumbler set, a cylinder head rotatably fitted to the large-diameter hole and the small-diameter hole, and a cylinder having a tumbler; and a large-diameter hole of the small-diameter hole in the case. At the side end, a weir is provided to partition the lower tumbler engagement groove side and the drain hole side of the large-diameter hole, and the lower half of the large-diameter hole is closer to the front end of the case than the upper half. Formed at the rear end of the lower half of the large-diameter hole toward the front end of the case. A case-side sealing surface is provided, and a case-side stopper surface is provided along the axial direction of the large-diameter hole portion at the left and right upper ends of the case-side sealing surface. The case-side sealing surface opposes the case-side sealing surface. Also, an arc-shaped cylinder head-side sealing surface longer than the case-side sealing surface is provided, and an upper portion of the cylinder head is protruded toward the tumbler portion so as to come into contact with the case-side stopper surface when the cylinder rotates. A cylinder head side stopper surface is provided.

Therefore, water that has entered the cylinder head through a key plate hole or the like during car washing or the like is discharged out of the case through a drain hole below the large-diameter hole. In addition, water that has entered the gap between the large-diameter hole of the case and the head of the cylinder is guided to the lower drain hole through the gap and discharged out of the case.

[0007] Even when the infiltrated water overflows from the drain hole, the cylinder head side sealing surface is in contact with the case side sealing surface at the lower half front end weir of the small diameter hole. The sealing surface prevents the water from entering the tumbler portion in the cylinder. Thus, for example, the tumbler is prevented from freezing in a cold region or the like, and rusting of the tumbler is prevented, so that the operability of unlocking and locking is greatly improved.

Further, since the tumbler engaging groove side and the drain hole side of the large diameter hole are partitioned by the weir, even if the cylinder is pulled out, the tumbler is caught by the weir and cannot be pulled out. Depending on the strength of the part, a sufficient anti-theft effect can be obtained.

Further, since the stopper surface on the cylinder head side comes into contact with the stopper surface on the case when the cylinder rotates, the rotation angle of the cylinder (key plate) can be regulated.

According to a second aspect of the present invention, there is provided the key cylinder for an automobile according to the first aspect, wherein the case-side stopper surface has a slope for drainage.

Therefore, in addition to the same operation and effect as the first aspect of the present invention, since the case-side stopper surface has a slope for drainage, the intruded water does not collect on the stopper surface and the head of the cylinder does not accumulate. The water is guided to the drain hole at the bottom through the gap around the outer periphery of the part and is discharged out of the case, and the waterproofness of the tumbler part is further ensured.

According to a third aspect of the present invention, there is provided the key cylinder for an automobile according to the second aspect, wherein the drain slope is inclined downward from the case-side stopper surface to the case-side seal surface. Further, it is characterized in that it naturally disappears from the large-diameter hole to the small-diameter hole so as not to cover the small-diameter hole.

Therefore, in addition to the operation and effect equivalent to the second aspect of the present invention, since the drain slope of the case-side stopper surface does not cover the small-diameter hole, the infiltrated water is guided to the outer periphery of the cylinder head. The tumbler portion is prevented from being transferred to the small-diameter hole portion side, and the waterproofness of the tumbler portion is improved.

According to a fourth aspect of the present invention, there is provided a key cylinder for an automobile according to the second or third aspect, wherein the drain slope is provided on both of the left and right case-side stopper surfaces. It is characterized by the following.

Therefore, in addition to the same operation and effect as the second or third aspect of the present invention, since the drain slope of the case-side stopper surface is provided on both sides of the stopper surface, the waterproofness of the tumbler portion is improved. Further improve.

[0016]

As is apparent from the above description, according to the first aspect of the present invention, water that has entered the cylinder head from the key plate hole or the like at the time of car washing or the like is located below the large-diameter hole. It is discharged out of the case through the drain hole. In addition, water that has entered the gap between the large-diameter hole of the case and the head of the cylinder is guided to the lower drain hole through the gap and discharged out of the case.

Even in the case where the infiltrated water overflows from the drain hole, the cylinder head side sealing surface is opposed to the case side sealing surface at the lower half front end weir portion of the small diameter hole. The sealing surface prevents the water from entering the tumbler portion in the cylinder. Thus, for example, the tumbler is prevented from freezing in a cold region or the like, and rusting of the tumbler is prevented, so that the operability of unlocking and locking is greatly improved.

Further, since the tumbler engaging groove side and the drain hole side of the large diameter hole are partitioned by the weir, the tumbler is caught by the weir and cannot be pulled out even if the cylinder is to be pulled out. Depending on the strength of the weir, a sufficient anti-theft effect can be obtained.

Further, since the stopper surface on the cylinder head side comes into contact with the stopper surface on the case side when the cylinder rotates, the rotation angle of the cylinder (key plate) can be regulated.

According to the invention described in claim 2, according to claim 1,
In addition to the same effects as those of the invention, the case-side stopper surface has a slope for drainage, so that the intruded water does not accumulate on the stopper surface, but travels through the gap around the outer periphery of the cylinder head, so that the water at the lower portion is formed. The tumbler is guided out of the case and discharged out of the case.

According to the invention described in claim 3, according to claim 2,
In addition to the same effect as the invention of the above, the drainage slope of the case side stopper surface does not cover the small diameter hole, so that the intruded water can be guided to the outer periphery of the cylinder head and transmitted to the small diameter hole side. It is suppressed, and the waterproofness of the tumbler part is improved.

According to the invention described in claim 4, claim 2 is provided.
Alternatively, in addition to the same effects as those of the third aspect, the drainage slope of the case-side stopper surface is provided on both sides of the stopper surface, so that the waterproofness of the tumbler portion is further improved.

[0023]

1 and 2 show an embodiment of the present invention.
This will be described below. FIG. 1 shows a state in which the key cylinder 1 of the present embodiment is disassembled into main components. The key cylinder 1 is mounted on a door panel of an automobile, for example, so as to be substantially horizontal, and the vertical direction in FIG. 1 is the vertical direction when the key cylinder is mounted.
The left side of FIG. 1 shows the front end (the end on the key plate insertion side), and the right side shows the back side of the door panel. FIG. 2 is an enlarged perspective view of a main part.

The structure of the key cylinder 1 will be described.

As shown in FIG. 1, the key cylinder 1 is roughly divided into a hollow cylindrical case 5 having a hollow hole 3, a cylinder 7 fitted into the hollow hole 3, and a flange portion 9 of the case 5. And a cover 11 which also serves as a decoration.

As shown in FIG. 1, the hollow hole 3 of the case 5 has a large-diameter hole 15 opening in the front end face 9a of the flange 9 and a small-diameter hole extending concentrically and continuously to the rear. 19
Consists of The depth of the large-diameter hole portion 15 from the flange end surface 9a differs between the upper half-peripheral portion and the lower half-peripheral portion, which substantially divide the hole diameter into two, and the lower half-peripheral portion is shallower by a predetermined amount than the upper half-peripheral portion. It is formed so that it becomes.

In this way, the front end of the lower half of the small-diameter hole 19 has an arc-shaped case-side sealing surface 15 facing the flange 9.
a protrudes from the front end of the upper half toward the flange 9 side. Thus, the front end of the upper half portion of the small-diameter hole 19 has an arc-shaped end face 15b also facing the flange 9 side.
Are formed so as to be recessed further than the sealing surface 15a in the lower half, and the both surfaces 15a, 15b are connected via substantially horizontal case-side stopper surfaces 17, 17, which divide the large-diameter hole portion 15 into upper and lower parts. .

The case-side stopper surfaces 17, 1
As shown in FIG. 2, the large-diameter hole 15 is inclined downward to the sealing surface 15 a side so that it does not fall on the small-diameter hole 19.
Slope 1 for drainage that disappears naturally from the side to the small-diameter hole 19 side
7a and 17a are formed respectively.

A drain groove 21 extending from the end surface 9a of the flange 9 to the sealing surface 15a in the depth direction is formed below the large-diameter hole portion 15. It has a hole 21a.

On the other hand, a tumbler groove (tumbler engaging groove) 5 with which the tumbler 23 is engaged is provided above and below the small-diameter hole 19.
a, 5b extend in the depth direction (axial direction). A weir 15c is located between the case-side sealing surface 15a and the front end of the lower tumbler groove 5b in the depth direction.
Are provided, and both 15a, 5b are separated by a weir portion 15c. Further, the lower tumbler groove 5 b is opened on the lower surface of the case 5.

The cylinder 7 is provided with the large-diameter hole 1 of the case 5.
The cylinder head 25 and the tumbler 27 are rotatably fitted in the hole 5 and the small-diameter hole 19, respectively. An arc-shaped cylinder head-side sealing surface 25a which is in contact with the case-side sealing surface 15a when fitted to the case 5 and is longer than the sealing surface 15a is formed at a lower portion of the back of the cylinder head 25. The arcuate upper portion of the back portion protrudes toward the small-diameter hole portion 19 from the sealing surface 25a, and the cylinder head side stopper surface 2 which opposes the case side stopper surface 17 in the circumferential direction at both ends.
5b.

Further, a key plate hole 7a is provided in the cylinder head 25, and a drain hole (not shown) communicating with the drain groove 21 of the case 5 is provided at a lower portion. A set of a plurality of tumblers 23 is built in the tumbler unit 27.

When the cylinder 7 is fitted into the case 5,
The cylinder head side sealing surface 25a contacts the case side sealing surface 15a of the lower half of the case 5. When the cylinder 7 rotates in the case 5 (that is, when the key plate is rotated), the cylinder head side stopper surface 25b comes into contact with the case side stopper surface 17, and the rotation angle of the cylinder 7 (key plate) Is restricted within a predetermined angle range.

The key cylinder 1 is assembled by the cylinder 7
With the key plate paired with the key plate hole 7a and the tumbler 23 retracted, the cylinder 7 is inserted into the hollow hole 3 of the case 5, and the tip of the tumbler portion 27 of the cylinder 7 penetrating the hollow hole 3 is After attaching a return spring, a lever, a retaining ring, and the like (not shown), the cover 11 is integrated with the flange portion 9 of the case 5 by caulking. In this integrated state, the cylinder head side sealing surface 25a contacts the case side sealing surface 15a as described above.

For mounting the key cylinder 1 on a door panel of an automobile, for example, the cylindrical portion 13 of the case 5 is inserted into a key cylinder mounting hole of the door panel, and the case 5 is fixed to the door panel by a fixing member at the back of the door panel. I do.

Next, the operation of the key cylinder 1 will be described.

When the key cylinder 1 is mounted on the door panel of an automobile as described above, water that has entered the cylinder head 25 from the key plate hole 7a or the like during car washing or the like drains through the drain hole below the cylinder head 25. It is discharged from the groove 21 to the outside of the case 5. Further, the water that has entered the gap between the large-diameter hole 15 of the case 5 and the cylinder head 25 is guided to the lower drain 21 via the gap and discharged to the outside of the case 5. At this time, water that is going to collect on the case-side stopper surface 17 is guided from the slope 17a to the outer periphery of the cylinder head 25, and there is no danger of collecting on the stopper 17 and the inclination direction of the slope 17a descending to the outer periphery. Therefore, there is little possibility that water will enter the small-diameter hole side.

Further, even in the case where the intruded water overflows from the drain groove 21, the cylinder head side seal surface 25a abuts on the case side seal surface 15a at the inner end of the drain groove 21.
Further, since the weir portion 15c is provided on the back side, water is blocked at this portion, and flooding of the tumbler 23 is prevented.

When dew condensation or the like occurs in the tumbler 23, the tumbler 23 is prevented from being rusted because it is discharged to the outside of the case 5 through an opening in the lower surface of the lower tumbler groove 5b.

In this way, for example, the tumbler is prevented from freezing in a cold region or the like, and rusting of the tumbler is prevented, so that the operability of unlocking and locking the key cylinder 1 is greatly improved, and unlocking and locking are performed. When the rotation angle at the time is the case side stopper surface 17 and the cylinder head side stopper surface 25
It can be regulated by setting the contact position with b.

Further, even if it is attempted to pull out the cylinder 7, the tumbler 23 engaged with the tumbler groove 5b is caught by the front end (the weir portion 15c of the case 5) of the tumbler groove 5b, and it is impossible to pull out the cylinder 7. is there. In this way, a sufficient anti-theft effect is obtained due to the case strength of the weir 15c, and it is not necessary to separately provide a dedicated member for preventing the pull-out.

[Brief description of the drawings]

FIG. 1 is an exploded view of one embodiment.

FIG. 2 is an enlarged view of a main part of one embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Key cylinder 3 Hollow hole 5 Case 5a, 5b Tumbler groove (tumbler engagement groove) 7 Cylinder 9 Flange part 9a Front end face of flange part 11 Cover 13 Cylindrical part of case 15 Large-diameter hole part of case 15a Sealing surface on case side 15b End face of upper half part of small-diameter hole part 15c Weir part 17 Case-side stopper surface 19 Small-diameter hole part of case 21 Drainage groove 21a Drain hole 23 Tumbler (tumbler set) 25 Cylinder head 25a Cylinder head side sealing surface 25b Cylinder head Side stopper surface 27 Tumbler of cylinder

Claims (4)

[Claims] 1. A large-diameter hole opening at a front end and having a drain hole at a lower portion, and a small-diameter hole extending concentrically adjacent to the back of the large-diameter hole and having a tumbler engaging groove at upper and lower portions. It has a hollow cylindrical case fixed to the vehicle body panel side so that these holes extend almost horizontally, a key plate hole and a tumbler set, and is rotatable to the large diameter hole and the small diameter hole, respectively. A cylinder having a cylinder head and a tumbler portion that fits into the lower tumbler engagement groove side and a drain hole of the large-diameter hole portion at an end of the small-diameter hole portion on the large-diameter hole portion side in the case. A dam portion for partitioning the large-diameter hole is formed at the rear end of the large-diameter hole at the rear end of the lower half of the large-diameter hole. An arc-shaped case-side sealing surface facing the front end of the case is provided. A case-side stopper surface is provided along the axial direction of the hole, and an arc-shaped cylinder head-side seal surface that is longer than the case-side seal surface is provided on the back of the cylinder head, opposite to the case-side seal surface. A key cylinder for an automobile, wherein an upper portion of the cylinder head protrudes toward the tumbler portion, and a cylinder head side stopper surface is provided which comes into contact with the case side stopper surface when the cylinder rotates. 2. The key cylinder for an automobile according to claim 1, wherein said case-side stopper surface has a slope for drainage. 3. The key cylinder for an automobile according to claim 2, wherein the drain slope is inclined downward from the case-side stopper surface to the case-side seal surface, and does not cover the small-diameter hole. A key cylinder for an automobile characterized in that it disappears naturally from the large-diameter hole to the small-diameter hole. 4. The vehicle key cylinder according to claim 2, wherein the drain slope is provided on both of the left and right case-side stopper surfaces. Key cylinder.