JP2558214Y2 - Air direction blade drive for air conditioner - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind direction blade drive for an air conditioner, and more particularly to a wind direction blade drive for swinging a wind direction blade by converting a rotary motion of a rotary drive source into a reciprocating motion.

[0002]

2. Description of the Related Art For example, in an air conditioner of a vehicle, in order to make a temperature distribution uniform, a wind direction blade is continuously swung to change a blowing direction of hot air or cold air. As such a wind direction blade driving device, as described in, for example, Japanese Utility Model Publication No. 2-33078, a plate connected to the wind direction blade is provided with a long hole in a direction perpendicular to the direction of movement. 2. Description of the Related Art There is known an apparatus which reciprocates a plate by rotating an engaging member which engages with a long hole.

[0003] In this publication, when the engagement member is not engaged with the long hole, that is, when the dead point is reached, the drive motor is in a no-load state or a lightly-loaded state, and a rattling sound is generated. Has proposed means for reducing this rattling sound. That is, any one of the inner peripheral surfaces of the elongated holes is configured to always apply a force to the engagement member.

Further, Japanese Utility Model Publication No. 2-40427 proposes an apparatus in which at least one of a long hole and an engaging member is constituted by elastic means for the same purpose as described above. Further, in Japanese Utility Model Publication No. 2-40428, an engagement member having a substantially elliptical cross section is installed on the eccentric cam with the long axis of the cross section directed toward the rotation center of the eccentric cam. An apparatus has been proposed in which a sliding resistance is applied to an engaging member near the top dead center and the bottom dead center of a plate by engaging with a long hole.

[0005]

The wind direction blade drive described in any of the above publications can eliminate rattling of the drive motor. However, when adjusting the load on the drive motor as the rotary drive source, it is necessary to adjust the sliding resistance to the elongated hole, and this adjustment is not always easy. That is, it is difficult to adjust so that a small load change such as a load change on the drive motor can be offset only by the sliding resistance between the long hole of the plate and the engaging member.

Accordingly, an object of the present invention is to provide a wind direction blade drive device capable of reliably reducing load fluctuations even when a load fluctuation on a rotary drive source including a no-load state or a light load state is small. .

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a wind direction blade driving apparatus for an air conditioner, which converts a rotational motion of a rotary driving source into a reciprocating motion and swings a wind direction blade. A first reciprocating member connected to the wind direction blade and having a first elongated hole in a predetermined axial direction;
A second reciprocating member having a second elongated hole in an axial direction orthogonal to an axial direction of the elongated hole, and an engagement slidably engaged with both the first and second elongated holes. A connecting member having a member and fixed to the rotating shaft of the rotary drive source at a position separated by a predetermined distance from the engaging member; and a sliding member in the axial direction of the second elongated hole with respect to the second reciprocating member. Urging means for imparting dynamic resistance, said urging means providing said first reciprocating member
The load having a phase difference of 90 ° with respect to the load of
It is configured to be applied to a reciprocating member .

[0008]

In the wind direction blade driving device for an air conditioner constructed as described above, when the rotary drive source is driven, the connecting member fixed to the rotary shaft rotates. The rotational motion of the connecting member is transmitted to the first and second elongated holes via the engaging member, and the first and second reciprocating members reciprocate in their respective axial directions. In response to this reciprocating motion, the wind direction blade connected to the first reciprocating member swings. A sliding resistance is applied to the second reciprocating member by the urging means, so that a load having a phase difference of 90 ° from the load of the first reciprocating member is applied to the rotary drive source. Will be. That is, a combined load of the load of the first reciprocating member and the load of the second reciprocating member is applied to the rotary drive source via the connecting member,
The load fluctuation becomes extremely small.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the wind direction blade driving device according to the present invention will be described below with reference to the drawings. FIG. 3 shows the appearance of the wind direction blade driving device 1 according to one embodiment of the present invention. When a switch 2 is pressed, a plurality of wind direction blades 3 swings to perform a so-called swinging motion. I have. The plurality of wind direction blades 3 are disposed in parallel with each other at the opening of the housing 4 and are supported by the housing 4 so as to be swingable. A pin 5 protruding out of the housing 4 is fixed to one of the plurality of wind direction blades 3, and a substantially U-shaped holder 6 is fixed to a protruding end of the pin 5, and a support plate 40 forming the upper surface of the housing 4 Extending parallel to

On the support plate 40, a first plate 10 as a first reciprocating member and a second plate 20 as a second reciprocating member according to the present invention are arranged in an overlapping manner. Each is slidably supported. A pin 12 is implanted in the first plate 10, and the holder 6 is arranged so as to engage with the pin 12. The drive mechanism including the first and second plates 10, 20 and the like will be described in detail below with reference to FIGS.

In FIG. 1, a recess 40a is formed in a support plate 40 of a housing 4, and a hole 41 is formed in the recess 40a. In addition, the support plate 40 includes
In order to regulate the direction of movement of the second plate 20, two pairs of parallel opposing guides 42 are provided. A pin 43 is implanted between one of the opposing guides 42. Although the guide 42 of this embodiment is formed integrally with the support plate 40, it may be formed separately and then joined. Alternatively, a long hole may be formed in the support plate 40, and a projection that fits into the long hole may be provided on the bottom surface of the second plate 20.

Thus, the second plate 20 is placed on the support plate 40 and slidably held between the opposing guides 42. The second plate 20 is a rectangular plate in the present embodiment, and has an elongated hole 21 formed in a central portion in the longitudinal direction thereof in parallel with the guide 42 and an elongated hole 22 formed in a direction orthogonal to the elongated hole 21. Have been. When the second plate 20 is disposed between the guides 42, 42, the pins 43 implanted in the support plate 40 pass through the elongated holes 21, and their heads are exposed on the second plate 20. The leaf spring 23 as the urging means according to the present invention is fixed to the pin 43 by a screw 24. Therefore, the second plate 20 is held in a state of being urged in the direction of the support plate 40 by the urging force of the leaf spring 23.

The leaf spring 23 is formed in a substantially H shape in plan view, and is disposed so that the elongated hole 21 is located between the opposing legs. The pins 43 implanted on the support plate 40 described above.
Has a guide portion 43a extending in a direction parallel to the guide 42 on both side surfaces thereof.
3 is formed, and the pin 43 including the guide portion 43a is connected to the hole 23a of the leaf spring 23.
a. Thus, leaf spring 2
3 is held so as to extend along the longitudinal direction of the elongated hole 21 without rotating around the pin 43.

Between the support plate 40 and the second plate 20, there is provided a crank 30 having a pin 31 on the upper surface of one end and a shaft 32 on the lower surface of the other end. That is, the crank 30 constitutes a connecting member according to the present invention, and is arranged so that the pin 31 is inserted through the elongated hole 22 and the shaft portion 32 is fitted into the hole 41. Accordingly, the crank 30 is rotatably supported around the hole 41 in the concave portion 40a, and the second plate 20
The pin 31 is disposed so as to be inserted and exposed.

Further, a first plate 10 is disposed so as to overlap with the second plate 20. First plate 1
Numeral 0 is slidably supported by a known means (not shown) on the support plate 40, and has an elongated hole 1 in a direction orthogonal to the moving direction.
1 is formed. The first plate 10 has a longitudinal direction of the long hole 11 orthogonal to a longitudinal direction of the long hole 22 of the second plate 20, and the overlapping portion of the long hole 11 and the long hole 22 is formed by a pin 31 of the crank 30. Are arranged to penetrate,
It is supported by the support plate 40. Therefore, the crank 30
The pin 31 is engaged with the two elongated holes 11 and 22 to constitute an engaging member according to the present invention.

The first plate 10, the second plate 20, the crank 30, and the support plate 40 are assembled as shown in FIG.
Connected to. That is, the rotating shaft 52 connected to the output shaft of the motor 50 via the gear box 51
And the crank 30 is rotated in accordance with the rotation of the rotating shaft 52. The motor 50 is fixed to the housing 4 and controlled to be turned on and off by the switch 2 described above. It should be noted that the overlapping relationship between the first plate 10 and the second plate 20 is reversed, and the first plate 1 is placed between the second plate 20 and the support plate 40.
0 may be interposed.

Next, the operation of the drive mechanism shown in FIGS. 1 and 2 will be described with reference to FIGS. FIG. 5 to FIG.
First rotation accompanying rotation of the motor 50 and thus rotation of the rotation shaft 52
3 shows a relative positional relationship between the long hole 11 of the plate 10, the long hole 22 of the second plate 20, and the pin 31 of the crank 30. . That is, in FIG. 5, the crank 30 rotates counterclockwise about the rotation center C with the rotation of the rotating shaft 52, and goes through the states of FIGS. 6 and 7 to the state of FIG. 8, and from the state of FIG. In this state, the crank 30 has made one revolution. During this time, the long hole 11 and the long hole 22 reciprocate in directions orthogonal to each other.

Specifically, the elongated hole 11 moves in the horizontal direction in FIGS. 5 to 8 while being pressed by the pin 31 and advances from the position in FIG. 5 to the left end position in FIG. 8 and then reaches the right end position in FIG. 8 and returns to the position in FIG. On the other hand, the elongated hole 22 is
8 to the middle position in FIG. 6 from the upper end position shown in FIG. 5 and the lower end position in FIG.
Returning to the upper end position in FIG. 5 via the intermediate position in FIG. Thus,
For the crank 30 of the connecting member, the elongated hole 11 constitutes a first elongated hole according to the present invention, and the elongated hole 22 constitutes a second elongated hole .

In the reciprocating motion of the long hole 11 and the long hole 22, the pin 31 rotates around the rotation center C while sliding in the long hole 11 and the long hole 22. A dead center occurs. That is, the positions of FIGS. 6 and 8 for the long hole 11 and the positions of FIGS. 5 and 7 for the long hole 22 are dead points, respectively. In this way, a 90 ° phase difference is formed at each dead center in the relative movement between the pin 31 and the elongated holes 11 and 22. Therefore, although the load fluctuation on the motor 50 in the reciprocating motion of each of the first and second plates 10 and 20 is inevitable, the load fluctuation of the first plate 10 on the motor 50 indicated by a chain line in FIG. 4, the load fluctuation of the second plate 20 indicated by the broken line is synthesized, and the load fluctuation on the motor 50 becomes extremely small as indicated by the solid line in FIG.

The load on the second plate 20 is given as a sliding frictional force against the support plate 40 by the urging force of the leaf spring 23. Therefore, the load on the motor 50 can be adjusted by adjusting the spring characteristics of the leaf spring 23 or appropriately setting the friction coefficient of the second plate 20 and / or the support plate 40. It is possible to set the load equal to the load of the first plate 10 due to the resistance of the first plate 10.

In this case, it is not necessary to particularly consider the sliding resistance between the pin 31 and each of the long hole 11 and the long hole 22, and the sliding resistance during the reciprocating motion of the second plate 20 is Similarly, the resistance may be set to a value equivalent to the resistance of the reciprocating first plate 10 at the time of reciprocating movement, so that it is possible to easily adjust the load fluctuation on the motor 50 to a minimum.

FIG. 9 shows that when the load variation of the first plate 10 with respect to the motor 50 is not uniform and a cosine curve as shown in FIG. 4 cannot be obtained, the load variation of the second plate 20 is adjusted accordingly. It is designed to be adjustable. That is, unevenness 20a is formed on the contact surface of the second plate 20 with the leaf spring 23. By appropriately setting the shape of the unevenness 20a, it is possible to cope with a load variation of the first plate 10. Can be provided with sliding resistance.

FIG. 10 shows another embodiment of the present invention, in which a second plate 200 is slidably mounted on a first plate 100, and
A biasing means for biasing 0 is provided on the first plate 100. That is, a concave portion 101 is formed in the first plate 100, and a pair of leaf springs 23 are formed on both side surfaces of the concave portion 101.
0, 230 are provided, and the second plate 200 accommodated in the concave portion 101 is sandwiched between the leaf springs 230, 230 to provide sliding resistance.
Slots 110 of the first and second plates 100, 200,
220 are formed so as to be orthogonal to each other, and the other configuration is the same as that of the embodiment of FIGS. Thus,
This embodiment is effective when it is difficult to secure a sliding space for the second plate.

In the above embodiment, the leaf spring 23,
Instead of 230, various biasing means such as a coil spring, a resin spring, and an oil damper can be used.

[0025]

The present invention is constructed as described above and has the following effects. That is, in the wind direction blade driving device of the present invention, the first and second reciprocating members whose movement directions are orthogonal to each other are used, and the load of the first reciprocating member is applied to the second reciprocating member by the urging means. 9 for
A load having a phase difference of 0 ° is applied, and the first and second reciprocating members are configured to be driven by the rotary drive source via the connecting member. It can be surely reduced. Therefore, noise near the rotary drive source is small, and stable swinging movement of the wind direction blade can be ensured.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a driving mechanism according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a driving mechanism according to an embodiment of the present invention.

FIG. 3 is a perspective view of a wind direction blade driving device according to an embodiment of the present invention;

FIG. 4 is a graph showing a load variation on a motor according to an embodiment of the present invention;

FIG. 5 shows a slot 11, a slot 22, and a pin 31 which are displaced in accordance with the rotational movement of the crank 30 in one embodiment of the present invention.
It is explanatory drawing which shows the relative positional relationship.

FIG. 6 shows a slot 11, a slot 22, and a pin 31 which are displaced in accordance with the rotational movement of the crank 30 in one embodiment of the present invention.
It is explanatory drawing which shows the relative positional relationship.

FIG. 7 shows an elongated hole 11, an elongated hole 22, and a pin 31 which are displaced in accordance with the rotational movement of the crank 30 in one embodiment of the present invention.
It is explanatory drawing which shows the relative positional relationship.

FIG. 8 shows a slot 11, a slot 22, and a pin 31 which are displaced in accordance with the rotational movement of the crank 30 in one embodiment of the present invention.
It is explanatory drawing which shows the relative positional relationship.

FIG. 9 is a perspective view showing another embodiment of the second plate in one embodiment of the present invention.

FIG. 10 is a perspective view showing first and second plates according to another embodiment of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 wind direction blade driving device 3 wind direction blade 4 housing 10 first plate (first reciprocating member) 11 long hole (first long hole ) 20 second plate (second reciprocating member) 21 long hole 22 Slot (second slot ) 23 Leaf spring (biasing means) 30 Crank (connecting member) 31 Pin (engaging member) 40 Support plate 42 Guide 43 Pin 50 Motor (rotation drive source) 51 Gear box 52 Rotary shaft

Claims (1)

(57) [Scope of request for utility model registration] 1. A wind direction blade drive device for an air conditioner, which converts a rotary motion of a rotary drive source into a reciprocating motion and swings a wind direction blade, wherein a first slot is connected to the wind direction blade in a predetermined axial direction. A first reciprocating member having
A second reciprocating member having a second elongated hole in an axial direction orthogonal to an axial direction of the elongated hole, and an engagement slidably engaged with both the first and second elongated holes. A connecting member having a member and fixed to the rotating shaft of the rotary drive source at a position separated by a predetermined distance from the engaging member; and a sliding member in the axial direction of the second elongated hole with respect to the second reciprocating member. Urging means for imparting dynamic resistance, said urging means providing said first reciprocating member
The load having a phase difference of 90 ° with respect to the load of
A wind direction blade driving device for an air conditioner, which is configured to be applied to a reciprocating member .