JPH05319087A - Dial mounting structure for air blow-off device for automobile - Google Patents

Abstract

PURPOSE:To provide the dial mounting structure for an air blow-off device for an automobile, which can reduce assembling manhours while the moderate feeling of a dial is being kept with no post-regulation required. CONSTITUTION:The mounting structure is equipped with a boss 1, a positioning pin 2, a dial 3 including an insertion mounting hole 31, a positioning through hole 34, and a stopper sliding section 33 formed with a recessed section and a projected section at its outer periphery, a dial mounting section rotatably holding the dial 3, a stopper 4 which consists of a dial mounting section 41 rotatably holding the dial 3, and of a projected piece 42 which has a projected section at its tip end, and has a through groove 422 for the positioning pin while being formed at one end side of a dial fixed section, and with a screw, so that the stopper 4 holding the dial 3 at the dial mounting section 41 is inserted into the boss 1. Concurrently, the stopper 33 is fixed onto the boss 1 with a screw 51, and in this case, the dial mounting structure is characterized in that the projected section is so constituted as to be brought into contact with the stopper sliding section 33 by means of spring action when the dial 3 is rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dial mounting structure provided in an air blowing device for an automobile, and is used for ventilation of a vehicle interior of a vehicle and for adjusting the air flow rate of air conditioning.

[0002]

2. Description of the Related Art Usually, an air blowing device for an automobile is provided with a damper for adjusting the air flow such as air conditioning, and a dial for opening and closing the damper is attached to a side wall of a case body constituting the air blowing device. The damper is operated by connecting the damper and the dial with an arm so that the dial can be rotated from the passenger compartment. Here, when the damper is set by rotating the dial so as to achieve the desired air volume state (either the open state, the closed state, or the intermediate state of the damper), the damper malfunctions due to the wind pressure. It is necessary to have moderation so as not to do so. As a method of providing this moderation, conventionally, a mounting structure as shown in FIG. 7 has been adopted. That is, the moderating rib 6 is taken out from the case main body A, the dial 3 is inserted into the boss 1 for mounting the dial, and further, the spring 7 for providing the moderation above this.
(Generally, metal parts such as spring steel are used.)
The spring 7 was sandwiched between the dial 3 and the stopper 4 and then fixed by the screw 5. And after assembly,
When the dial 3 is rotated, the spring 7 is also rotated together with the protrusions 61, 62, 63 formed on the moderation rib 6.
In addition, by making the spring 7 contact with the spring, the spring has a moderation force to try to get over the protrusion. The protrusions 61, 62, 63 correspond to positions where the damper is in the open state, the closed state, and the intermediate state, respectively. Reference numeral 39 indicates a spring positioning pin formed on the dial 3, and reference numeral 71 indicates a hole for inserting the pin 39.

[0003]

However, in the dial mounting structure as described above, the spring is required only for giving a moderation feeling, and the number of parts is increased.
The man-hours for assembly were also large. Further, since the number of separate parts such as the spring increases, variations in the dimensions during assembly occur, and it is difficult to make subsequent adjustments at a portion where such a delicate operating force (or a feeling of moderation) is required. Further, since the spring is made of metal, the protrusion is scraped due to wear, which promotes variations in operating force.

The present invention overcomes the above-mentioned problems. Since the spring required in the past is carried by the stopper, there is no need for post-adjustment and the man-hours for assembling are maintained while maintaining the moderation of the dial. It is an object of the present invention to provide a dial mounting structure for an air blowing device for an automobile, which is capable of reducing the number of times, and also prevents the protrusions from being scraped.

[0005]

A dial mounting structure for an automobile air blowing device according to the present invention comprises a dial mounting boss (1) provided upright on a case body and an insertion hole for mounting on a stopper. And a dial (3) having a stopper sliding portion having a concave portion and a convex portion on the outer peripheral edge thereof, and a dial mounting portion (41) which is inserted into the insertion hole of the dial and rotatably holds the dial. And a stopper (4) including a protrusion piece (42) having a protrusion at the tip and formed on one end side of the dial mounting portion and having a spring action,
A screw (5) for screwing the stopper to the boss, the stopper holding the dial in the dial mounting portion is fitted into the boss, and the stopper is fixed to the boss with the screw. When the dial is turned, the protruding portion is configured to come into contact with the concave portion and the convex portion of the stopper sliding portion.

[0006]

In the dial mounting structure of the automobile air blowing device according to the present invention, the stopper is different from the conventional operation, is completely fixed to the boss, and the shape which also plays the role of the spring is formed by integral resin molding. It becomes unnecessary. And, the metal spring is not used, and the trouble caused by scraping is also eliminated. Further, since the mode is adjusted by the dial and the stopper, the dimensional variation at the time of assembly is reduced. Further, since the stopper and dial are sub-assembled in advance and then attached to the boss, there is no need for post-adjustment.

[0007]

EXAMPLES The present invention will be specifically described below with reference to examples. (1) Dial mounting structure of automobile air blowing device FIGS. 1 to 3 show an embodiment of a dial mounting structure according to the present invention, in which a boss 1, a positioning pin 2, a dial 3 and a stopper 4 are provided. , And a tapping screw 51.

The boss 1 is formed integrally with the case body A of the automobile air blowing device by resin molding and has a thick hollow cylindrical shape. The positioning pin 2 is also provided by resin molding integrally with the case body. The boss 1 and the positioning pin 2 are formed so as to stand on the side wall of the case body. The dial 3 has an overall shape of a substantially donut plate, and has an insertion hole 31 at the approximate center thereof. Then, part of the outer peripheral edge of this dial is inflated, and the operation knob 32
And a stopper sliding portion 33 composed of three concave portions 331 and two convex portions 332 is formed on the outer peripheral edge facing this. Reference numeral 34 indicates the stopper sliding portion 33.
A through hole is formed by cutting the dial plate surface in an arc shape. The case body and the dial are made of acrylonitrile-butadiene-styrene copolymer (ABS) resin.

The stopper 4 comprises a dial mounting portion 41 and a protruding piece 42. The stopper 4 is preferably made of polyacetal resin, fluororesin, or the like, which has excellent self-lubricating property. The dial mounting portion 41 has a cylindrical shape,
It is composed of a head portion 411, a tubular portion 412, and a claw portion 413 (FIG. 3). The head 411 has a disc shape having a hole 4111. The outer diameter of the tubular portion 412 is slightly smaller than the dial insertion hole 31, and the height of the tubular portion 412 is slightly larger than the plate thickness of the dial 3 around the insertion hole. When the tube portion 412 is attached to the dial 3, the dial 3 is attached to the head 411.
And the claw portion 413 are integrally held by the dial mounting portion 41,
It is structured so that it can rotate with respect to the stopper (Fig. 3). Incidentally, the cylindrical portion 412 and the claw portion 413 are in a state of being divided into four by having four slits in the longitudinal direction of the cylinder.

As shown in FIG. 1, the projecting piece 42 is a portion that horizontally extends from the head portion 411 of the dial mounting portion 41, is a rectangular plate, and has its tip bent at a right angle to form a dial contact portion 421. There is. Actually, a protrusion 4211 is provided inside the dial contact portion 421 (FIG. 2), and when the dial 3 and the stopper 4 are correctly attached to the boss 1, the protrusion 4211 is attached to the stopper sliding portion 33. The contact is adopted. Specifically, FIG. 3 shows a state in which the stopper 4 is inserted into the dial 3 and attached to the boss 1 and screwed with the tapping screw 51. From the stopper protrusion 42
Make the distance to 11 equal. Therefore, the distance from the center of the boss to the dial convex portion 332 is slightly larger than the distance from the center of the boss to the protrusion portion 4211 of the stopper, so that a moderation can be provided. Reference numeral 422 is a protruding piece 42.
Shows a passage groove partially opened (Fig. 2). Positioning pin 2
It is for passing through. The stopper 4 is screwed to the boss 1, but even if the screw is loosened and the stopper 4 rotates,
The positioning pin 2 is locked in the passage groove 422, and the stopper 4
There will be no misalignment. A thin portion 423 is formed on the protruding piece 42 near the dial mounting portion so as to cross the protruding piece 42. When the dial 3 slides from the concave portion 331 to the convex portion 332, it exerts a spring action,
This is to bring the protrusion 4211 into contact therewith (FIG. 4). In this embodiment, the tapping screw 51 is used as the screw. The stopper 4 in which the dial 3 is integrally assembled is screwed to the boss 1.

(2) Assembly of dial according to the present invention The claw portion 413 of the dial mounting portion 41 is inserted into the dial insertion hole 3
1 and the dial 3 and the stopper 4 are integrated. Since the cylindrical portion 412 and the claw portion 413 are formed with slits, they can easily pass through the insertion hole 31 while bending inward. At this point, the protrusion 4211 of the stopper 4
Is preferably brought into contact with the concave portion 331 of the dial 3. After that, the positioning pin 2 is passed through the passage hole 34 and the passage groove 422, and the cylindrical portion 412 is inserted into the boss 1 to attach the stopper 4 integrated with the dial 3 to the side wall of the case body. Then, the stopper 4 is screwed onto the boss 1 by using the hole 4111 with the tapping screw 51, and the dial installation of the automobile air blowing device is completed (FIG. 3).

(3) Dial operation Fig. 5 shows a state in which the damper is open and the dial is attached. still,
In FIG. 5 (including FIG. 6), the dial shape is slightly changed from that shown in FIGS. Reference numeral 35 indicates a locking shaft for mounting an arm that is connected to the damper. The positional relationship between the stopper sliding portion 33 of the dial 3 and the protruding portion 4211 of the stopper 4 in this state is as shown in FIG. Next, rotate the dial to close the damper. When the projection 4221 comes into contact with the projection 332 from the recess 331 by turning the dial 3, the stopper 4 is fixed by the tapping screw 51 and the positioning pin 2 so as not to be rotationally movable. In order to increase the distance, the thin portion 423 acts like a spring action and is lifted slightly upward (see FIG. 4). The drop between the concave portion 331 and the convex portion 332 gives an appropriate operating force. Then, when the dial 3 is rotated while feeling the moderation in the hand, the user feels a click at the half-opened position of the damper and once enters the set state. Further, if the dial 3 is turned, the feeling of contact changes, and it enters into a state where it snaps into place, and the dial is set to the damper closed (Fig. 6). In this way, when the damper is set in the closed state, it becomes impossible to move over the convex portion 332 to the concave portion 331 in the semi-open state by some wind pressure or the like, and the moderation that prevents malfunction is maintained.

(4) Effects of the embodiment When the dial according to the present embodiment was used to rotate the dial, a proper sense of moderation was provided and the damper did not malfunction due to wind pressure or the like. In addition, the stopper 4
Since the boss 1 and the positioning pin 2 are completely fixed in position, and the projecting piece 42 having a spring function is integrally formed, the stopper 4 also functions as a spring, and the spring is not necessary. .. As a result, the number of parts has been reduced, and the number of assembly steps has also been reduced. Further, since the tubular portion 412 is inserted into the insertion hole 31, the dial 3 and the stopper 4 can be integrated in advance, and the moderation can be performed only by the dial 3 and the stopper 4. It was easy to adjust the operating force with moderation. And there is no need for post-adjustment. In addition, the protruding piece 4
Since the spring effect is obtained by providing the thin portion 423 on the second portion 2, the protrusion 4211 of the protruding piece 42 can be brought into contact with the protrusion 332 of the stopper sliding portion 33 with an appropriate moderation. Further, since the stopper 4 is made of polyacetal resin, it has excellent self-lubricating property and there is no fear that the product will be scraped.

The present invention is not limited to the specific examples described above, but various modifications may be made within the scope of the present invention depending on the purpose, application and the like. For example, the shape and size of the dial and the stopper are
It is appropriately changed according to the purpose of use. Specifically, depending on the application, the entire protruding piece of the stopper may be thinned to provide a spring action as a whole. Further, the positioning pin 2, the passage hole 34, and the passage groove 422 are eliminated, and the boss 1
May have a prism shape or the like, and the stopper 4 may be fixed in position by matching the inner diameter of the cylindrical portion 412 of the stopper 4 with the shape of the boss 1. As a result, since the positioning pin, the passage hole and the like are eliminated, the dial mounting structure is simplified, the position is securely fixed, and idling of the stopper mounted on the boss can be completely prevented. Of course, if the position of the stopper 4 can be fixed by only screws, these may be omitted altogether. Furthermore, the present invention is not limited to the operation of the damper shown in this embodiment, but may be used for the operation of the vertical louver of the ventilator.

[0015]

As described above, according to the dial mounting structure of the automobile air blowing device according to the present invention, since the spring is not required, the number of assembling steps can be reduced, and the protrusion can be prevented from being scraped. .. Further, since the mode is adjusted by the dial and the stopper, the dimensional variation at the time of assembly is reduced and the work for adjusting the operating force is also reduced. Further, since the dial and the stopper can be sub-assembled in advance, there is no need for post-adjustment and the assembling workability is improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a dial mounting structure of an automobile air blowing device according to an embodiment.

FIG. 2 is an enlarged perspective view of a dial contact portion of the stopper of FIG.

FIG. 3 is an explanatory longitudinal sectional view showing how the dial of the automobile air blowing device according to the present embodiment is attached to the case body.

FIG. 4 is an explanatory longitudinal sectional view showing a state in which the dial of FIG. 3 is rotationally operated and the protrusion of the dial and the protrusion of the stopper come into contact with each other.

FIG. 5 is a front view showing the positional relationship between the dial and the stopper when the damper is open.

FIG. 6 is a front view showing the positional relationship between the dial and the stopper when the damper is closed.

FIG. 7 is an exploded perspective view showing a dial mounting structure of a conventional automobile air blowing device.

[Explanation of symbols]

1; Boss, 2; Positioning pin, 3; Dial, 31; Insertion hole, 33; Stopper sliding part, 331; Recessed part, 332;
Convex part, 34; Passage hole, 4; Stopper, 41; Dial mounting part, 42; Projecting piece, 421; Dial contact part, 42
11: protrusion, 422; passage groove, 423; thin portion, 5;
Screw, 51; tapping screw, 6; rib for moderation,
7; Spring.

Claims (1)

[Claims] 1. A stopper sliding portion having a dial mounting boss (1) standing on the case body and an insertion hole for mounting on a stopper, and having a concave portion and a convex portion formed on an outer peripheral edge thereof. A dial (3) provided, a dial mounting portion (41) which is inserted into the insertion hole of the dial and rotatably holds the dial, and a protrusion at the tip, which is formed at one end side of the dial mounting portion. , A protruding piece having a spring action (4
2) and a stopper (4) and a screw (5) for screwing the stopper to the boss, and the stopper holding the dial in the dial mounting portion is fitted into the boss and , The air blowout for an automobile, characterized in that, when the stopper is fixed to the boss with the screw and the dial is turned, the protrusion contacts the recess and protrusion of the stopper sliding part. Device dial mounting structure.