JPH0629389Y2 - Key cylinder anti-theft structure for automobile back door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a key cylinder used in, for example, a back door for a 5-door type automobile, in which a gap is provided between the key cylinder and the cylinder insertion opening of the back door. The present invention relates to an anti-theft structure capable of preventing the rotating member of the key cylinder from rotating from the outside.

[Conventional technology]

For example, a key cylinder used in a back door for a five-door type vehicle has a cylinder body attached to a back door that is openably and closably disposed at a rear end opening of a vehicle body, and is rotatably attached to an inner end thereof. The operation of the rotating member is transmitted to the engaging member via a link, and the engaged member is engaged with the engaged member formed at the opening of the vehicle body to lock the back door on the vehicle body.

By the way, when the key cylinder is attached to the back door, the key cylinder insertion opening has a slightly larger diameter in order to absorb an assembly error and a press molding error of the cylinder insertion opening. There is a gap with the cylinder body. for that reason,
Conventionally, by inserting a wire or the like into the gap from outside the vehicle,
There is a danger that the back door and the vehicle body will be unlocked by rotating the rotating member and the luggage or the like will be stolen.

Therefore, a theft-prevention structure has been conventionally used which prevents the turning member from turning from the outside. For example, there is a theft-prevention structure shown in FIG. This is because a cylindrical flange 12a that covers the edge portion of the cylinder insertion opening 11 of the back door 14 is integrally formed by resin molding on the license garnish 12 to which the key cylinder 13 is fixed. A sealing elastic member 15 is interposed between the flange 12a and the end surface of the flange 12a.
This prevents the wire or the like from being inserted through the gap 10.

[Problems to be solved by the invention]

However, the above-mentioned conventional antitheft structure cannot obtain a sufficient antitheft effect. This is because the flange 12a is made of resin because it is necessary to be integrally formed with the license garnish 12, and the strength is low. That is, since the flange 12a can be easily broken, there is a possibility that it can be unlocked by breaking or deforming the flange 12a, inserting a wire or the like through the gap 10, and rotating the rotating member 13a.

The present invention has been made to solve the above-mentioned conventional problems, and provides a theft prevention structure for a key cylinder in a back door for an automobile, which can reliably prevent the turning member from turning from the outside. Has an aim.

[Means for solving problems]

According to the present invention, a garnish is attached to a back door arranged at a rear end opening of a vehicle body, a cylinder main body is attached to the garnish, and the operation of a rotating member of the garnish is transmitted to an engaging member via a link. In a key cylinder for locking the back door to the vehicle body by engaging the engaging member with an engaged member formed in the vehicle body opening, a holding hole into which the rear end of the cylinder body is inserted and fixed in the garnish. And a front end portion of the cylinder body is inserted into a cylinder insertion opening formed in a back door, and a protection plate having a diameter larger than that of the cylinder insertion opening is formed in a front portion of the cylinder body. Theft, characterized in that the gap between the cylinder body and the cylinder opening is covered from the outside of the vehicle body, and a seal member is closely sandwiched between the outer peripheral edge of the protective plate and the inner peripheral edge of the cylinder insertion opening. A stop structure.

[Action]

According to the anti-theft structure of the key cylinder in the back door for an automobile according to the present invention, the protective plate covering the gap between the cylinder body and the cylinder insertion opening is formed on the cylinder body, so that the turning member portion from the outside to the inside is formed. The above-mentioned gap that is communicated is blocked by the above-mentioned protective plate, which can prevent the insertion of wire or the like through the above-mentioned gap, prevent the rotating member from rotating from the outside, and hold the door in the locked state. Yes, you can prevent theft.

Further, since the seal member is interposed between the outer peripheral edge of the protective plate and the inner peripheral edge of the cylinder insertion opening, it is possible to prevent rainwater and the like from entering.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are views for explaining a theft prevention structure of a key cylinder in an automobile back door according to an embodiment of the present invention.

In the figure, reference numeral 1 denotes a five-door type vehicle to which the structure of this embodiment is applied, and a back door 2 is provided in a rear end opening 1a of the vehicle 1 so as to be openable and closable. A license garnish 4 is attached to the center of the back door 2. The license garnish 4 is made of resin, and is fixed to the outer panel 2b of the back door by mounting bolts (not shown) planted on the inner surface thereof. A cylindrical cylinder guide 4a and a flange 4b are integrally formed on the inner surface of the license garnish 4. The cylinder body 3 is inserted and arranged in the cylinder guide 4a, and the outer end portion 3d of the cylinder body 3 is disposed. Is inserted and fixed in the holding hole 4c of the license garnish 4.

The inner end of the cylinder body 3 has a cylinder insertion opening 2 formed in the outer panel 2b of the back door 2.
It is inserted into a from the outside. A gap 6 is formed between the outer periphery of the cylinder body 3 and the insertion opening 2a. The gap 6 absorbs a manufacturing error and an assembly error, and is for smoothly performing the attaching work when the license garnish 4 is attached to the outer panel 2b with the cylinder body 3 fixed thereto.

Further, a rotating member 3c which is rotated by a key operation is arranged at an inner end portion of the cylinder body 3, and the rotating member 3c is not shown in the drawing but is connected to a back door via a link 5. 2 is connected to an engaging member disposed in the vicinity of the rear end opening 1a, and the engaging member is connected to the rear end opening 1a.
Can be engaged with and disengaged from the engaged member formed at the edge of the.

The cylinder body 3 has a disc-shaped protective plate 3a.
Are integrally formed by die casting. A little inside the outer peripheral edge 3e of the protective plate 3a, a cylindrical guide portion 3
b is integrally formed, and the guide portion 3b is inserted into the cylinder insertion opening 2a. Also this protection plate 3
A rubber sheet 7 as a seal member is sandwiched between the outer peripheral edge 3e of a and the inner peripheral edge 2c of the cylinder insertion opening 2a. In this way, the gap 6 is covered from the outside.

Next, the function and effect of this embodiment will be described.

In the anti-theft structure of this embodiment, the license garnish 4 is attached to the outer panel 2 with the cylinder body 3 fixed thereto.
When it is attached to b, the protection plate 3a of the cylinder body 3 presses the rubber sheet 7 against the edge of the cylinder insertion opening 2a, thereby completely opening the gap 6 which is a space communicating from the outside to the inside. can do. Further, since the protective plate 3a is integrally formed with the key cylinder 3 by the dun cast, its strength is greatly improved. Therefore, it is possible to prevent the problem that the wire or the like is inserted through the gap as in the conventional case, prevent the pivoting member from pivoting outward, and ensure the locking, so that the antitheft property can be improved.

Furthermore, in this embodiment, the protective plate 3a of the cylinder body 3 is
Since the tubular flange 3b is integrally formed on the inner side of the outer peripheral edge of the rubber sheet, the flange 3b can prevent theft as described above, and can also serve as a guide function when the rubber sheet 7 is attached. Is reliably attached, and the waterproofness of the inner side of the outer panel 2b can be improved.

Further, since the garnish 4 to which the cylinder body 3 is fixed is provided with the holding hole 4c, the workability of attaching the cylinder body 3 can be improved.

Although the flange 3b of the protective plate 3a is formed slightly inward of the outer peripheral edge portion in the above embodiment, it may be formed integrally with the outer peripheral edge portion of the protective plate 3a depending on the shape of the cylinder insertion opening. A rubber sheet may be attached inside. Further, in the above embodiment, the protective plate is formed integrally with the cylinder body, but this protective plate may of course be formed separately.

[Effect of device]

As described above, according to the anti-theft structure of the key cylinder in the back door for an automobile according to the present invention, since the holding hole is provided in the garnish to which the cylinder body is fixed, the workability of installing the cylinder body can be improved. is there. A protective plate that covers the gap between the cylinder body and the cylinder insertion opening of the back door is formed on the cylinder body, and the seal member is tightly sandwiched between the outer peripheral edge of the protective plate and the inner peripheral edge of the cylinder insertion opening. It has the effect that it can be closed to prevent theft and the sealing property.

[Brief description of drawings]

1 and 2 are views for explaining a key cylinder antitheft structure in an automobile back door according to an embodiment of the present invention. FIG. 1 is a sectional side view of a key cylinder fixing portion, FIG. 2 is a rear view of a 5-door type vehicle to which the structure is applied, and FIG. 3 is a sectional side view of a conventional key cylinder fixing portion. In the figure, 1 is an automobile, 1a is a rear end opening, 2 is a back door, 2a is a key cylinder insertion opening, 3 is a cylinder body, 3a is a protective plate, 3c is a rotating member, 5 is a link, and 6 is a gap. is there.

Claims (1)

[Scope of utility model registration request] 1. A garnish is attached to a back door which is openably and closably disposed at an opening of a rear end of a vehicle body, a cylinder main body is attached to the garnish, and a rotary operation is performed by a key operation at an inner end of the cylinder main body. A moving member is provided, and the operation of the rotating member is transmitted to an engaging member via a link, and the engaging member is engaged with an engaged member formed in the vehicle body opening portion, thereby the back door. In the key cylinder that locks the
A theft-preventing structure for preventing the turning member from turning from the outside, wherein a holding hole into which the rear end of the cylinder body is inserted and fixed is formed in the garnish, and the front end of the cylinder body is formed. Part is inserted into the cylinder insertion opening formed in the back door, and a protection plate having a diameter larger than that of the cylinder insertion opening is formed in the front part of the cylinder body, and the protection plate forms a gap between the cylinder body and the cylinder opening. A structure for preventing theft of a key cylinder in a back door for an automobile, characterized in that it is covered from the outside of the vehicle body, and a seal member is closely sandwiched between the outer peripheral edge of the protective plate and the inner peripheral edge of the cylinder insertion opening.