JPH0518820Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an improvement of a waterproof and dustproof boot that covers a door courtesy switch of an automobile.

[Prior Art] Automobiles are generally equipped with a door courtesy switch that automatically turns on and off room lamps and step lamps when the door is opened and closed in order to facilitate boarding and alighting at night.

In the courtesy switch, when a door is closed, a movable shaft is pushed to open the opposing contacts, and when the door is opened, the movable shaft is pushed back by the elasticity of a return spring to close the contacts. The protrusion of the movable shaft of this door courtesy switch is covered with a flexible boot to prevent rainwater, dust, etc. from entering the switch, thereby ensuring the life of the switch.

However, since the opposing contact surface of the boot that contacts the door panel surface when the door is closed is wide, smooth and flexible, a suction cup effect is created on the opposing contact surface when the door is opened, and the contact surface of the boot is brought into contact with the door panel surface. When the door panel surface and the boot contact surface separate when the door is opened, a peeling sound is generated.
This peeling sound acts as a double sound together with the door lock release sound, making it difficult to feel the sense of moderation when opening the door.

[Problems to be solved by the invention] In view of the above-mentioned problems, this invention solves the generation of double sounds when the door is opened without creating a suction cup effect by devising the door-facing contact surface of the door courtesy switch boot. An object of the present invention is to provide a door courtesy switch boot that improves the sense of moderation when opening a door.

[Means for Solving the Problems] The door courtesy switch of this invention has a movable shaft slidably inserted into a case attached to the vehicle body, and is always biased in a direction protruding from the outer end of the case. A boot that flexibly covers a protruding part of the movable shaft of a switch, and a non-contact part is formed on the contact surface facing the door of the boot to allow air to flow between the contact surface and the door when the door is closed. It is provided with a plurality of protrusions.

[Embodiment] In the embodiment shown in FIGS. 1 and 2, the door courtesy switch 1 has a case 11 attached to the vehicle body 2, and a movable shaft 1 inside the case 11.
2 is always projected from the outer end of the case 11 toward the door 4 by the biasing force of a return spring (not shown). The protruding portion of the door courtesy switch 1 from the vehicle body 2 is covered with a door courtesy switch boot 3 made of soft synthetic resin or rubber material, and the distal end of the protruding portion of the movable shaft 12 is is door 4
Case 1 touches the panel surface of door 4 when it is closed.
A movable shaft 12 is mounted in such a way that it can be pushed back.

In the above-mentioned courtesy switch boot 3, a bent flexible portion 31 is integrally connected to a base 35 and is connected to a movable shaft 12.
A hollow part 36 that covers a protrusion from the outer end of the case 11
The top surface of the hollow portion 36 of the flexible portion 31 forms an opposing contact surface 32 with respect to the panel surface of the door 4. A plurality of protrusions 33 are provided on this opposing contact surface 32.
is provided to form a non-contact surface 34. The projections 33 provided on the opposing contact surface 32 can be formed integrally with the boot 3 itself as in the embodiments shown in FIGS. 1 and 2, or can be formed by pasting a tape or the like with a rough surface. This protrusion 33 forms an opposing gap between the non-contact surface 34 and the panel surface of the door 4 when closed, and this opposing gap constitutes an air flow path. Further, the protrusions 33 may be formed into countless minute protrusions (matte-like).

In the door courtesy switch boot 3 configured as described above, when the door 4 is opened, the movable shaft 12 of the door courtesy switch 1 is biased by the return spring and moves in the direction of protruding from the outer end of the case 11. When the top surface (opposing contact surface 32) of the bent flexible portion 31 is pushed back, the door lock is released, and the door 4 is opened, the protrusion 33 provided on the opposing contact surface 32, which had been in close contact with it, is easily removed. Leave. That is, since an air flow passage is always formed in the gap between the non-contact surface 34 formed on the opposing contact surface 32 and the panel surface of the door 4, a suction cup effect does not occur, and therefore the door 4 and the boot 3 At the time of separation from the door, the conventional peeling sound B indicated by the broken line in FIG. 3 does not occur, and only the door lock release sound A occurs, eliminating the discomfort caused by the double sound.

[Effect of the invention] The door courtesy switch of this invention has a movable shaft that is slidably inserted into a case attached to the vehicle body and is always biased in a direction to protrude from the outer end of the case. A boot that flexibly covers a protruding part of the boot, the boot having a door-facing contact surface having a plurality of protrusions forming a non-contact part through which air can flow between the contact surface and the door when the door is closed. Since air is constantly circulating through the non-contact portion formed on the contact surface of the boot, there is no suction cup effect between the opposing contact surfaces of the door panel and the boot when the door is opened. ,
No peeling sound occurs. Therefore, the unpleasant double sound when opening the door can be completely eliminated, and the feeling of moderation when opening the door can be improved.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of this invention; Figure 1 is a longitudinal sectional view of the door courtesy switch, Figure 2 is a front view of the door courtesy switch, and Figure 2 is a front view of the door courtesy switch.
FIG. 3 is a characteristic diagram showing the relationship between the sounds generated when the door is opened. 1...Door courtesy switch, 3...Door courtesy switch boot, 31...Flexible part, 32...
Door facing contact surface, 33...Protrusion, 34...Non-contact part.

Claims (1)

[Scope of utility model registration request] A boot that flexibly covers a protrusion of a movable shaft of a door courtesy switch, in which a movable shaft is slidably inserted into a case attached to a vehicle body and is always biased in a direction to protrude from the outer edge of the case. A door courtesy switch boot, characterized in that a contact surface of the boot facing the door is provided with a plurality of protrusions that form a non-contact part through which air can flow between the contact surface and the door when the door is closed.