KR101039681B1 - Device for preventing whistle noise in air damper of air vent for automobile - Google Patents

Abstract

The present invention relates to an apparatus for preventing whistle noise of an air vent damper for automobiles, and includes protruding / retracting pads at respective rims of the top and bottom of the air damper so that the air damper is rotated until it is completely closed by the operation of the air volume control knob. In this case, each pad is provided with a pad driving unit for instantaneous automatic retracting operation at each edge of the air damper, so that the pad is inserted into the air damper until just before the air damper is closed. As a result, the present invention relates to a whistle noise preventing device for an automobile air vent damper that provides a flow passage expansion form as compared with the conventional art, thereby providing a whistle noise preventing effect by securing a flow path.

Automotive, air vents, dampers, pads, screw shafts, sliders, strikers, movable members, whistle noise

Description

Device for preventing whistle noise in air damper of air vent for automobile}             

1 is a block diagram showing an apparatus for preventing whistle noise of an air damper according to the present invention;

Figure 2 is a side view of the damper showing the installation state of the whistle noise prevention device according to the present invention,

3a to 3d is an operating state of the present invention when the air damper is to close the air passage in the vent duct,

Figure 4a is an operating state showing the moving state of the lower movable member drive pin in contact with the convex rim surface of the striker when the instantaneous retracting operation of the pad is made during the final closing operation of the air damper in the present invention,

Figure 4b is an operating state showing the state when the drive pin of the lower movable member passes through the slider during the initial opening operation of the air damper in the present invention,

Figure 5a is a perspective view of the assembly of a typical automotive air vent,

Figure 5b is an exploded perspective view showing the configuration of a typical automotive air vent.

<Explanation of symbols for main parts of the drawings>

11: vent duct 11a: jamming jaw                 

15: air damper 21a, 21b: movable member

22: return spring 24: drive pin

30: pad drive unit 31: drive gear

32: screw shaft 33: driven gear

34: guide axis 35: slider

36, 37: Striker 39: Spring

The present invention relates to an apparatus for preventing whistle noise of an automobile air vent damper, and more particularly, to protrude / retract a pad on each edge of an upper and a lower end of an air damper, and to allow the air damper to be completely operated by the air volume control knob. When the pad is rotated until it is closed, the pad is provided with a pad driving unit for instantaneous automatic retracting operation at each edge of the air damper, so that the pad is drawn into the air damper until just before the air damper is closed. The present invention relates to a whistle noise preventing device for an automobile air vent damper, which does not occur, and consequently takes a form of expanding a flow path as compared with the conventional one, thereby providing a whistle noise preventing effect by securing a flow path.

In general, an automobile is equipped with an air conditioning system that generates warm air or cold air and supplies it to the room for heating and cooling the room.

In such an air conditioning system, the air forcedly blown by the blower is passed through the air conditioner to be cooled or passed through the heater to be heated, and then supplied to the inside of the cabin.

On the other hand, the warm air or cold air provided from the air conditioner or the heater device is guided to the indoor side through the duct and the air direction and the air volume is adjusted through the air vent 10 as shown in FIG.

The air vent 10 has a blade for adjusting the wind direction and an air damper for adjusting the amount of air, which will be described below in more detail with reference to FIG. 5B.

As shown, the wind direction control knob 12 and the air volume control knob 13 is installed in the center and side of the vent duct 11, respectively, the wind direction control knob 12 is installed inside the vent duct (11) It is possible to adjust the wind direction by rotating the blade 14, the air volume control knob 13 is rotated up and down by rotating the air damper 15 installed inside the vent duct 11 up and down the vent duct ( 11) The air volume can be adjusted by opening and closing the air passage.

The air damper 15 is a plate-shaped part formed in a substantially quadrangular shape, such as the shape of the vent duct 11, and has a hinge 16, which is a center of rotation, at a central portion thereof. 13), the pad 18 is fused or fitted to the rim.                         

As a result, the air damper 15 is rotated up and down based on the hinge 16 of the center when the air volume control knob 13 is adjusted up and down to block or open the air passage in the vent duct 11.

That is, the opening and closing amount is adjusted while the rotational position of the air damper 15 is changed according to the rotation amount of the air volume control knob 13. When the air volume control knob 13 is rotated downward to the maximum, the air damper 15 is vented. When the air passage in the duct 11 is completely closed to block the discharge of hot or cold air, and rotated upward, the air damper 15 opens the air cylinder in the vent duct 11 to the maximum to maximize the discharge amount of the hot or cold air. Shall be.

However, in the air vent 10 made as described above, there is a problem that whistle noise occurs in the state in which the air damper 15 is almost closed.

With the air damper 15 almost closed, the air passes through the narrow gap between the vent duct 11 and the pad 18 to form a vortex and at the same time vibrate the pad 18 and eventually cause the pad to be blown. 18), the air is shaken to generate high frequency sound in the 5 ~ 10kHz band, and this noise is called whistle noise.

This whistle noise does not occur when the air damper 15 is completely open or completely closed, but occurs when the air damper 15 is opened slightly before closing.

When the air damper 15 is completely closed, noise and vibration are not generated while the pad 18 and the locking jaw 19 of the inner side of the vent duct 11 are in uniform surface contact.

The whistle noise is a noise caused by the concentration of acoustic energy in a specific frequency band, and at a high frequency, even when the sound pressure is low, the degree of discomfort is very strong, and is generated in almost all vehicles provided with the air damper 15 as described above. Deteriorates the vehicle's interior quietness.

Therefore, when the air damper 15 is operated to prevent the air flow in the automotive air vent 10, measures to improve the high-frequency noise generated by the flow noise and the pad trembling are caused by the flow rate is temporarily narrowed. This situation is desperately required.

Therefore, the present invention has been invented to solve the above problems, it is possible to protrude / retract the pad on each edge of the top and bottom of the air damper so that the air damper is completely closed by the operation of the air volume control knob until When the pad is rotated, the pad is provided with a pad driving unit for instantaneous automatic drawing operation at each edge of the air damper, so that the pad is drawn into the air damper until just before the air damper is closed. As a result, an object of the present invention is to provide a whistle noise preventing device for an automobile air vent damper which provides a flow passage expansion form as compared with the related art to provide a whistle noise preventing effect by securing a flow path.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Whistle noise preventing device of the vehicle air vent damper according to the present invention, in order to prevent the whistle noise generation of the vehicle air vent damper, in the state that the pad is mounted so as to protrude / retract operation on the upper and lower edges of the air damper, Upper and lower movable members, each of which is installed to be movable up and down by a damper guide protruding from one surface of the air damper, one end of which is coupled to the corresponding pad;

A return spring installed between each of the movable members and the dampers to release the following pad driving portion and to restore the position of the movable member for the protruding operation of the pad;

A pad driving unit which operates in conjunction with the rotation of the air damper, and simultaneously pulls the movable members from just before the air damper is completely closed to the full close so that each of the pads protrudes from the edge of the air damper and then protrudes;

Characterized in that comprises a.

In particular, the return spring is mounted in a spring mounting hole formed in each of the movable members, one end of which is fixed to a spring support end protruding from one surface of the air damper, and the other end of the return spring is fixed in a spring mounting hole of the movable member. It is done.

In addition, the pad driving unit,

A drive gear integrally fixed to one end of the air damper hinge shaft that rotates according to the air flow control knob operation;

A screw shaft installed side by side with the air damper hinge shaft in a bracket supporting state on one surface of the air damper;

A driven gear integrally fixed to one end of the screw shaft in mesh with the drive gear;

It is mounted on the guide shaft installed in parallel with the screw shaft while being guided and mounted on the screw shaft so as to be moved left and right by the screw shaft rotation. A slider to release after a momentary pull;

Characterized in that comprises a.

Here, the slider has a rotatable striker is installed so as to pull the movable member to the upper side and the lower side, and each of the striker is a convex in which one side and the other side of the drive pin formed on the movable member is in contact movement It is formed so as to be elastically rotated by a spring installed at the center of rotation from the state supported by the stopper of the slider while being in a surface and a concave surface, so that each striker convex rim surface of the striker constrained by the stopper is The driving pin is characterized in that the pulling of each movable member is made during the movement.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a whistle noise preventing device installed in a damper of an automobile air vent, and to each side of the upper and lower edges of the air damper is mounted to enable protruding / retracting operation, the air damper is completely closed by the operation of the air volume control knob When the rotation is performed just before, each pad is pulled by the pad driving unit and automatically drawn into the air damper, and the flow path between the pad end and the inner side of the vent duct is instantaneously expanded so that the flow path is temporarily narrowed and the flow velocity is generated by the flow velocity. It is to help reduce.

1 is a block diagram showing the whistle noise preventing device of the air damper according to the present invention, Figure 2 is a side view of the damper showing the installation state of the whistle noise preventing device according to the present invention.

As shown in the drawing, in order to apply the whistle noise preventing device of the present invention, pads 18a and 18b are mounted at upper and lower edges of the air damper 15, in particular, the pads 18a and 18b are air dampers. It is installed in each space 15a provided in the upper end part and the lower end part of 15, and it is made to protrude operation | movement or the drawing operation in each edge of the air damper 15. As shown in FIG.

In addition, movable members 21a and 21b which are moved downward by the pad drive unit 30 configured to interlock with the rotation of the air damper 15 to draw in the pads 18a and 18b are installed. The movable members 21a and 21b are provided. ) Are respectively provided on the upper side and the lower side of the damper hinge shaft 15b for the operation of the upper pad 18a and the lower pad 18b.

Each of the movable members 21a and 21b is a portion connecting the pads 18a and 18b and the pad driver 30 to draw in the corresponding pads 18a and 18b. The upper movable member 21a and the lower movable member ( 21b) are installed in the same structure and configuration, and in the same mounting state, but the two movable members 21a and 21b are operated by the pad driver 30 to be opposed to each other.                     

That is, the movable members 21a and 21b are simultaneously pulled and operated in the direction of the damper hinge shaft 15b by the pad driving unit 30. At this time, the upper movable member 21a is lowered and the lower movable member 21b is The upper movable member 21a is pulled upward and the lower movable member 21b is pulled downward by the spring force of the corresponding return spring 22, which is pulled upward and the pad driving unit 30 is released. It is supposed to be.

The upper end of the upper movable member 21a and the lower end of the lower movable member 21b are coupled to the upper pad 18a and the lower pad 18b by pins 23, respectively, and the upper movable member 21a. At the lower end and the upper end of the lower movable member 21b, a driving pin 24 which receives the operating force from the pad driving unit 30 is formed.

In addition, the movable members 21a and 21b are fitted inside the damper guide 15c formed on one surface of the damper 15 so that the movable members 21a and 21b can be vertically guided by the damper guide 15c. A stopper 25 protruding from the damper guide 15c is formed in 21a and 21b so that the upper movable member 21a and the lower movable member 21b move to the upper side and the lower side, respectively. As the stopper 25 is caught by the damper guide 15c in the state, further movement is limited.

In addition, a spring mounting hole 26 is formed in the middle of each of the movable members 21a and 21b, and one end of the spring support hole is protruded from one surface of the air damper 15 in the spring mounting hole 26. The return spring 22, the other end of which is fixed to 15d and fixed to the spring mounting hole 26, is mounted. Although 22) is compressed, the return spring 22 is tension-restored in the state in which the pad drive unit 30 is released, and the movable members 21a and 21b return to move in opposite directions.

On the other hand, the pad drive unit 30 is connected to the further air damper rotation in the state in which the air damper 15 is rotated just before closing by the operation of the air volume control knob (reference numeral 13 in FIG. 5B). The pads 18a and 18b are drawn into the frame space 15a from the edge of the air damper by simultaneously pulling 21b in the direction of the center damper hinge axis 15b.

Referring to the preferred embodiment, first, the pad drive unit 30 includes a drive gear 31 which is integrally fixed to one end of the damper central hinge shaft 15b which rotates according to the operation of the air volume control knob. As the damper 15 rotates, it rotates with the hinge shaft 15b.

In addition, the pad drive unit 30 of the present invention includes a screw shaft 32 installed in parallel with the hinge shaft 15b on one surface of the damper 15, the screw shaft 32 is a bracket installed on the damper 15 A driven gear 33 which is rotatably supported by 32a and 32b and meshes with the drive gear 31 is integrally provided at one end thereof.

Then, the slider 35 is mounted on the screw shaft 32, the slider 35 is mounted in a bite state on the screw line 32a on the screw shaft 32 on one side, and the shaft 35 is mounted on the shaft length by the screw shaft rotation. It can be moved left and right.

In addition, the slider 35 is supported by a guide shaft 34, the other side of which is fixedly installed in parallel with the screw shaft 32 on one surface of the damper 15, and the guide shaft 34 moves on the screw shaft 32. It serves to hold the slider 35 so as not to rotate, the slider 35 is able to stably move left and right on the screw shaft 32 by the guide shaft 34.

The slider 35 has rotatable strikers 36 and 37 which are capable of pulling the movable members 21a and 21b to the upper and lower sides of the slider shaft 32 and the guide shaft 34, respectively. Each striker 36, 37 is resiliently rotated by a spring 39 installed at the center of rotation thereof.

In addition, the strikers 36 and 37 are configured to be restricted in one direction by stoppers 38a and 38b formed to protrude from the upper and lower ends of the slider 35, and in particular, the one edge 37a is convexly protruded. It has a curved surface, and the opposite edge surface 37b is a curved surface having a concave shape.

Referring to FIG. 1, the respective strikers 36 and 37 are rotatably installed on the upper and lower portions of the slider 35, and the upper striker 36 has a concave upper edge (not otherwise indicated). On the surface, the lower edge surface (not indicated by reference numeral) is a convex surface, the lower striker 37 is on the contrary, the upper edge surface 37a is a convex surface, and the lower edge surface 37b is a concave surface. It is.

The upper striker 36 of this type has a clockwise rotation constrained by the stopper 38a at the top of the slider 35 when the slider 35 moves to the left and passes the positions of the movable members 21a and 21b. The upper movable member 21a is pulled downward in the state, and the lower striker 37 is lowered in the state in which the counterclockwise rotation on the drawing is constrained by the stopper 38b at the lower end of the slider 35. The movable member 21b is pulled upward, and the upper and lower movable members 21a and 21b are in contact with the convex edge 37a of each striker 36 and 37. As they move, they are pulled downward and upward, respectively.

In addition, the slider 35 has completely passed through the movable members 21a and 21b, that is, the driving pins 24 of the movable members 21a and 21b are provided with the convex edges 37a of the strikers 36 and 37. In the state of complete passage, the pulling force of the strikers 36 and 37 acting on the movable members 21a and 2b through the driving pins 24 is released. In this case, the elastic restoring force of the return spring 22 is released. Each movable member 21a, 21b is made to return to a reverse direction again.

That is, the upper movable member 21a is pulled upward to the original position by the return spring 22, and the lower movable member 21b is pulled downward to the original position, wherein each pad 18a, 18b is a damper. It protrudes again from the edge of (15).

Hereinafter, with reference to Figures 3a to 3d and 4 attached to the operating state and effect of the present invention will be described in detail.

3A to 3D show the operating state of the present invention when the air damper closes the air passage in the vent duct. In each figure, the right view shows the rotational position of the air damper 15 in the vent duct 11 and the left view. Shows an operating state of the pad drive unit 30, the movable members 21a and 21b, and the pads 18a and 18b in the rotational position of the air damper 15. In particular, FIGS. 3A and 3B show that the air damper 15 It shows the state just before closing the air path in the vent duct 11 after rotating by the operation of the air volume control knob.                     

In addition, Figure 4a is an operating state diagram showing the moving state of the lower movable member drive pin in contact with the convex rim surface of the striker when the instantaneous retracting operation of the pad is made in the final closing operation of the air damper in the present invention, Figure 4b In the present invention, the operation state diagram showing the state when the drive pin of the lower movable member passes through the slider during the initial opening operation of the air damper.

First, in FIG. 3A, the air A damper 15 is arranged in the direction of arrow A when the air volume regulating knob (13 in FIG. 5B) is rotated up to the maximum, and the air damper 15 is vent duct 11. It is arranged parallel to the center line of) and the air passage is completely open.

In this state, when the user rotates the air volume control knob downward, the rotational force is transmitted to the damper hinge shaft 15b so that the air damper 15 rotates counterclockwise on the drawing and gradually the air passage in the vent duct 11 is rotated. Closed.

In such a state that the air damper 15 rotates to close the air passage, the driving gear 31 is rotated integrally with the air damper 15 to rotate the driven gear 33, and then the screw shaft 32 rotates. The slider 35 gradually moves toward the left movable members 21a and 21b.

As a result, the pads 18a and 18b in the protruding state of the upper and lower edges of the damper 15 approach the inner side of the vent duct 11 to some extent, i.e., on each striker convex rim 37a of the slider 35. In the state where the driving pins 24 of the movable members 21a and 21b are first entered (the state of FIG. 3A), while the slider 35 continues to move to the left (the user continuously operates the air volume control knob, During the rotation in the closing direction), as shown in Fig. 4A, the respective strikers 36 and 37 are supported by the stoppers 38a and 38b, and the respective movable members 21a and 21b in a state in which rotation is constrained. The driving pin 24 is in contact with the convex edges 37a of the strikers 36 and 37 to move.

Thus, while the drive pin 24 of each movable member 21a, 21b moves along the convex edge 37a of the said striker 36,37, the drive pin 24 and the movable member 21a, 21b are The convex rim 37a of the striker 36, 37 is pulled in the direction of the damper hinge axis 15b, so that both the movable members 21a, 21b are simultaneously pulled, and the pads 18a, 18b on both sides are pulled out. At the same time it is drawn into the air damper 15 (see FIG. 3B).

Subsequently, in the state where the driving pins 24 of the movable members 21a and 21b completely pass through the convex edges 37a of the strikers 36 and 37, the driving pins are released to the striker and at the same time, As the pulling force is released, the movable member and the driving pin are returned to their original up and down positions by the elastic restoring force of the return spring 22, so that the pads 18a and 18b on both sides are projected again.

As described above, the air damper 15 completely closes the air passage in the vent duct 11 while the pads 18a and 18b are protruded again. At this time, the pads 18a and 18b of the protruding state are vented ducts 11. ) Is brought into close contact with the locking step 11a of the inner surface to completely block the flow of air (see FIG. 3C).

As described above, the driving pins 24 of the movable members 21a and 21b pass through the convex edges 37a of the strikers 36 and 37, and the corresponding pads 18a are formed by pulling and returning the movable members. 18b) is instantaneously made while the air damper 15 rotates to the state of FIG. 3C which completely closes the air passage in the vent duct 11 in the state of FIG. 3A.

That is, the pads 18a and 18b protrude for a while until the air damper 15 completely closes the air passage in the vent duct 11, and then protrudes. The flow path between the ducts is no longer narrowed until just before the air damper is completely closed, but it is cut off at the fully closed position of the air damper, which prevents the conventional whistle noise generated when the air damper is slightly opened just before the air damper is closed. It becomes possible.

In other words, in the related art, whistle noise may occur as the flow path between the pads 18a and 18b and the vent duct 11 narrows from just before the air damper 15 is closed, but immediately before the air damper is closed when the present invention is applied. Even if the pad is pulled into the air damper until just before it is completely closed, the passage is not reduced, and the passage is expanded compared with the conventional, so that whistle noise can be prevented.

On the other hand, when the user rotates the air volume control knob upward to rotate the air damper 15 in reverse, the drive gear 31 and the driven gear 33 are rotated in reverse, the slider 35 is moved to the right again, FIG. 3D. And FIG. 4B shows the operating states of the strikers 36 and 37 in the state of passing through the drive pins 24 of the movable members 21a and 21b.

As shown, at the beginning of closing of the air damper 15, that is, at the beginning of the right movement of the slider 35, the driving pins 24 of the movable members 21a and 21b are formed on the concave edges of the strikers 36 and 37. Then, as the slider 35 continues to move to the right, the driving pins 24 of the movable members 21 and 21b pass through the concave rim 37b of the strikers 36 and 37, at which time the driving pins 24 The concave rim 37b is pushed to rotate the striker, and the strikers 36 and 37 are rotated by overcoming the force of the spring 39 provided at the center of rotation thereof, and then the driving pin 24 is rotated. When fully passed through) is rotated in the opposite direction again by the elastic restoring force of the spring 39 is returned.

Of course, as described above, while the driving pins 24 of the movable members 21a and 21b move in contact with the concave rim surfaces 37b of the strikers 36 and 37, the movable members 21a and 21b and the pads 18a, The up and down motion of 18b) does not occur.

Thereafter, when the user continuously rotates the air volume control knob upward, the air damper 15 is gradually opened, and the slider 35 continues to move to the right side along the screw shaft 32.

As described above, according to the apparatus for preventing whistle noise of an automobile air vent damper according to the present invention, a pad is protruded / retracted in the respective edges of the upper and lower ends of the air damper, and the air damper operates the air volume control knob. When the pad is rotated until it is completely closed, the pad is provided with a pad driving unit for instantaneous automatic retracting operation of each pad at each edge of the air damper, so that the pad is drawn into the air damper until just before the air damper is completely closed. It is possible to prevent the reduction of, and consequently to take the form of passage expansion as compared with the conventional one, thereby providing a whistle noise prevention effect by securing the passage.

In addition, the device according to the present invention is a device operated without additional energy supply, which further increases the adhesion of the pad to the vent duct by the spring force of the return spring installed between the movable member and the air damper in the fully closed state. Provide effect.

Claims (4)

In order to prevent whistle noise of the automobile air vent damper, the pad is mounted on the upper and lower edges of the air damper so that the pad can be protruded / retracted. Each of the upper and lower movable members having one end coupled to the corresponding pad; A return spring installed between each of the movable members and the dampers to release the pad driving unit and to restore the position of the movable member for protruding operation of the pad; A pad driving unit which operates in conjunction with the rotation of the air damper, and simultaneously pulls the movable members from just before the air damper is completely closed to the full close so that each of the pads protrudes from the edge of the air damper and then protrudes; Whistle noise preventing device of a vehicle air vent damper, characterized in that made. The method according to claim 1, The return spring, Mounted in the spring mounting holes formed in each of the movable members, one end is fixed to the spring support end protruding from one surface of the air damper, the other end of the automobile air vent damper, characterized in that fixed to the spring mounting hole of the movable member Whistle noise prevention device. The method according to claim 1, The pad drive unit, A drive gear integrally fixed to one end of the air damper hinge shaft that rotates according to the air flow control knob operation; A screw shaft installed side by side with the air damper hinge shaft in a bracket supporting state on one surface of the air damper; A driven gear integrally fixed to one end of the screw shaft in mesh with the drive gear; It is mounted on the guide shaft installed in parallel with the screw shaft while being guided and mounted on the screw shaft so as to be moved left and right by the screw shaft rotation. A slider to release after a momentary pull; Whistle noise preventing device of an automobile air vent damper, characterized in that made. The method of claim 3, The slider has a rotatable striker is installed so as to pull the movable member to the upper side and the lower side, and each of the striker is a convex surface to which the driving pins provided with one side and the other side of the rim is formed on the movable member respectively The drive pins are concave and provided to be elastically rotated by a spring installed at the center of rotation from the state supported by the stopper of the slider, and the drive pins on the respective striker convex rims of the constrained state by the stopper. An apparatus for preventing whistle of an automobile air vent damper, wherein the movable member is pulled during the contact movement.

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