JPH11342960A - Aspirator cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aspirator cap which is normally difficult to remove and becomes easy to remove when a knob is pulled up for removal. SOLUTION: An attaching hole 2 for attaching an aspirator is provided on a heater case 3 and is made to protrude cylindrically outward from a case 3. A plurality of ribs 4 protruding toward an inner diameter are provided on a cylindrical inner peripheral face formed with the attaching hole 2. The aspirator cap 1 is formed with a peripheral groove 7b to be engaged with the ribs 4 along an entire periphery of an outer peripheral face of a cylindrical wall 7 fitting in the attaching hole 2 in a press-fitted state and is also formed with a slit 7c in a direction approximately perpendicular to the peripheral groove 7b at a position where a knob 6 is provided in a peripheral direction of the cylindrical wall 7. When the aspirator cap 1 is to be removed from the attaching hole 2, the slit 1c is crushed in a peripheral direction to have the cylindrical wall 7 easily fallen toward the inner diameter when the knob 6 is pulled up, whereby the cylindrical wall 7 can be pulled out of the attaching hole 2 with relatively weak force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aspirator cap for closing a mounting hole for mounting an aspirator.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional aspirator cap has a lid 1 made of, for example, an elastomer resin.
10, a knob 120, and a cylindrical wall portion 130. The cylindrical wall portion 130 is press-fitted into a mounting hole 210 of an aspirator provided in the heater case 200 for use.

[0003]

However, since the conventional aspirator cap 100 is a resin product, compression strain is generated by cold heat, and the outer diameter of the cylindrical wall portion 130 is reduced, so that the cylindrical wall portion 130 may fall out of the mounting hole 210. there were. As means for preventing the aspirator cap 100 from falling off, as shown in FIG. 7, a rib 220 is provided on the inner peripheral surface of the mounting hole 210 on the case 200 side, and the entire outer peripheral surface of the cylindrical wall portion 130 is provided on the cap 100 side. A groove 140 (see FIG. 8) is provided around the circumference, so that when the cylindrical wall portion 130 is fitted into the mounting hole 210, the rib 220 and the groove 140 make it difficult to come off. However, in this case, the cap 10
0 (when the knob 120 is pulled up and the cylindrical wall 13
0 is pulled out from the mounting hole 210).

Therefore, as shown in FIG. 9, for example, it is conceivable to easily remove the cap 100 by partially removing the rib 220 provided in the mounting hole 210. Cap 1 on the side where you lost
00 knob 120 must be located. Also, when removing the cap 100, the knob 120 is pulled up and the entire cylindrical wall portion 130 is pulled out while being tilted in the mounting hole 210, so that the knob 120 is provided on the inner peripheral surface of the mounting hole 210 (FIG. It is necessary to pull out the cylindrical wall portion 130 of section B of 7) while pushing it down to the inner diameter side. That is,
Since the cylindrical wall portion 130 is strongly pressed against the inner peripheral surface of the mounting hole 210, the frictional force acting between the cylindrical wall portion 130 and the inner peripheral surface of the mounting hole 210 increases, and the force for pulling out the cylindrical wall portion 130 Becomes large. The present invention has been made based on the above circumstances, and its purpose is usually difficult to escape,
An object of the present invention is to provide an aspirator cap that can be easily removed when the knob is lifted up and removed.

[0005]

The aspirator cap is mounted on a cylindrical wall which is fitted into the inner periphery of the mounting hole in a press-fit state when the cylindrical wall is fitted into the mounting hole. A circumferential groove engaging with a rib provided in the hole is formed over the entire outer peripheral surface of the cylindrical wall portion, and is substantially orthogonal to the circumferential groove at a position where the knob is provided in the circumferential direction of the cylindrical wall portion. The slits are formed in the direction of movement. This aspirator cap is configured such that when the cylindrical wall portion is fitted into the inner periphery of the mounting hole, the circumferential groove formed on the outer periphery of the cylindrical wall portion and the rib provided on the inner peripheral surface of the mounting hole engage. As compared with a conventional product which is merely press-fitted into the mounting hole, it can be made harder to come off. Also, when removing the aspirator cap from the mounting hole, when the knob is pulled up, the cylindrical wall portion of the portion where the knob is provided is pressed against the inner peripheral surface of the mounting hole and the slit formed in the cylindrical wall portion Is collapsed in the circumferential direction, so that the cylindrical wall portion can easily fall down to the inner diameter side. Thereby, the force of pressing the cylindrical wall portion of the portion where the knob is provided against the inner peripheral surface of the mounting hole can be reduced. That is, since the frictional force acting between the cylindrical wall and the inner peripheral surface of the mounting hole can be reduced, the cylindrical wall can be pulled out from the mounting hole with a relatively weak force.

[0006]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a state in which the aspirator cap is attached to the attachment hole. The aspirator cap 1 covers a mounting hole 2 (see FIGS. 2 and 5) provided in advance for mounting an aspirator (not shown), and is applied to a vehicle equipped with a manual air conditioner that does not use an aspirator. As shown in FIG. 2, the mounting hole 2 is provided in the heater case 3 and protrudes outside the case 3 in a cylindrical shape. Further, ribs 4 protruding toward the inner diameter side are provided at a plurality of positions (for example, four positions) on the inner peripheral surface of the cylinder forming the mounting holes 2 as shown in FIG. The ribs 4 are in the height direction of the inner peripheral surface of the cylinder (the vertical direction in FIG. 2).
And protrudes toward the inner diameter side at a maximum of about 0.5 mm.

The aspirator cap 1 is made of an elastic material such as an elastomer resin, for example, and has a cover 5, a knob 6, and a cylindrical wall 7 as shown in FIG.
The lid 5 is provided in a substantially circular shape having an outer diameter slightly larger than the cylindrical outer diameter of the mounting hole 2, and can completely cover the mounting hole 2. As shown in FIG. 3, the knob 6 is provided to extend in a plate shape in a radial direction from a part in the circumferential direction of the lid portion 5, and a non-slip uneven portion 6 a is formed on both surfaces of the knob 6. I have.
The cylindrical wall portion 7 is provided so as to extend in a cylindrical shape from one surface of the lid portion 5, and has an outer diameter that can be fitted into the inner peripheral surface of the mounting hole 2 in a press-fit state (that is, the cylindrical inner diameter of the mounting hole 2). (Slightly larger outer diameter). In order to easily press-fit into the mounting hole 2, the inclined surface 7 is formed at the outer corner of the tip of the cylindrical wall portion 7.
a (chamfer) is provided (see FIG. 4).

In the cylindrical wall portion 7, a peripheral groove 7b which engages with the rib 4 when the cylindrical wall portion 7 is pressed into the mounting hole 2 is formed over the entire outer peripheral surface of the cylindrical wall portion 7. And cylindrical wall 7
At a position where the knob 6 is provided in the circumferential direction of the slit 7 in a direction substantially perpendicular to the circumferential groove 7b (the height direction of the cylindrical wall portion 7).
c is formed. As shown in FIGS. 2 and 3, the slit 7 c is formed over substantially the entire height of the cylindrical wall 7, and opens to the tip of the cylindrical wall 7. Inside the cylindrical wall 7, reinforcing ribs 7d for securing rigidity are provided at a plurality of locations. However, this reinforcing rib 7d is
As shown in FIG. 3, it is not provided near a portion where the slit 7c is formed (for example, up to a position separated from the slit 7c by about 90 degrees in the circumferential direction).

Next, the operation of the present embodiment will be described. As shown in FIG. 1, the aspirator cap 1 is mounted by press-fitting the cylindrical wall 7 into the inner periphery of the mounting hole 2, and the mounting hole 2 can be closed by the lid 5. The aspirator cap 1 is configured such that a circumferential groove 7b formed in the cylindrical wall portion 7 and a rib 4 provided in the mounting hole 2 engage with each other in a state where the cylindrical wall portion 7 is press-fitted into the mounting hole 2 to thereby provide an aspirator cap. The cap 1 can be hardly removed from the mounting hole 2. When the aspirator cap 1 is removed from the mounting hole 2, when the knob 6 is pulled up, the cylindrical wall portion 7 (part A in FIG. 3) where the knob 6 is provided is attached to the inner peripheral surface of the mounting hole 2. When the slit 7c formed in the cylindrical wall portion 7 is pressed and crushed in the circumferential direction, the cylindrical wall portion 7 can easily fall down to the inner diameter side. Thereby, when pulling out the cylindrical wall portion 7 from the mounting hole 2, the force of pressing the cylindrical wall portion 7 where the knob 6 is provided against the inner peripheral surface of the mounting hole 2 can be reduced. That is, the frictional force acting between the cylindrical wall portion 7 and the inner peripheral surface of the mounting hole 2 can be reduced.

(Effect of this Embodiment) In this embodiment, when the cylindrical wall portion 7 of the aspirator cap 1 is press-fitted into the mounting hole 2, the rib 4 provided in the mounting hole 2 and the cylindrical wall portion 7
Is engaged with the peripheral groove 7b formed on the entire outer peripheral surface of the cylindrical member 7 to prevent the aspirator cap 1 from dropping out of the mounting hole 2 even when the outer diameter of the cylindrical wall portion 7 is reduced due to the influence of cold heat. . Further, when the wind pressure in the heater case 3 is applied to the aspirator cap 1, the engaging force between the circumferential groove 7b and the rib 4 acts uniformly in the entire circumferential direction, so that the aspirator cap 1 does not easily fall off. On the other hand, when it is necessary to remove the aspirator cap 1 from the mounting hole 2 in order to incorporate the auto air conditioner, when the knob 6 is pulled up, the slit 7c is crushed in the circumferential direction and the cylindrical wall portion 7 easily falls down to the inner diameter side. The cylindrical wall 7 can be pulled out of the mounting hole 2 with a relatively small force, and the aspirator cap 1 can be easily removed from the mounting hole 2.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state where an aspirator cap is attached to an attachment hole.

FIG. 2 is a sectional view of an aspirator cap and a mounting hole.

FIG. 3 is a bottom view of the aspirator cap.

FIG. 4 is a side view of the aspirator cap as viewed from a knob side.

FIG. 5 is a plan view of a mounting hole.

FIG. 6 is a sectional view showing a state in which an aspirator cap is attached to an attachment hole (prior art).

FIG. 7 is a sectional view of an aspirator cap and a mounting hole (prior art).

FIG. 8 is a side view of the aspirator cap as viewed from the knob side (prior art).

FIG. 9 is a plan view of a mounting hole (prior art).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Aspirator cap 2 Mounting hole 4 Rib 5 Lid 6 Knob 7 Cylindrical wall 7b Peripheral groove 7c Slit

Claims (1)

[Claims] 1. An aspirator cap for closing a mounting hole provided in advance for mounting an aspirator, wherein the mounting hole is provided with a rib protruding toward the inner diameter side on an inner peripheral surface thereof. A cover portion for closing the mounting hole, a knob provided on a part of an outer peripheral edge of the cover portion, a cylindrical shape provided on the lid portion, and fitted into the inner periphery of the mounting hole by press-fitting. A cylindrical groove that engages with the rib when the cylindrical wall is fitted into the mounting hole, over the entire outer peripheral surface of the cylindrical wall. An aspirator cap, wherein a slit is formed at a position where the knob is provided in a circumferential direction of the cylindrical wall portion in a direction substantially orthogonal to the circumferential groove.