JP3752792B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner including a door capable of opening and closing an air passage opening.
[0002]
[Prior art]
There is a demand for an air conditioner to reduce parts in order to reduce costs. Therefore, in order to simplify the link mechanism for driving the door of the air conditioner, a so-called bottle opener shape having a three-branch portion that branches the link groove provided in the driven plate connected to the door in three directions. A link groove is known.
[0003]
[Problems to be solved by the invention]
The link mechanism that uses a bottle opener-shaped link groove has a moving force applied to the door and the driven plate by the wind pressure when the driven plate pin passes through the branch part of the link groove, and the pin is moved to the opposite groove. There is a problem that the link mechanism locks in.
In order to eliminate this problem, there is a means to apply a biasing force to the door with a spring means such as a spiral spring to suppress the movement of the driven plate due to wind pressure, but since a spring force is always applied to the door, a large operating force is applied. It becomes necessary.
[0004]
OBJECT OF THE INVENTION
An object of the present invention is to provide an air conditioner that can prevent the link mechanism from being locked without increasing the operating force even when a link groove branched in three directions is employed.
[0005]
[Means for Solving the Problems]
[Means of Claim 1]
When the drive plate pin passes through the branched portion of the driven plate, the driven projection and the drive projection come into contact with each other, so that even if a moving force is applied to the driven plate through the door by the wind pressure, the driven plate moves by the wind pressure. It is prevented from doing. As a result, the pin is prevented from entering the reverse groove, and the lock of the link mechanism composed of the drive link and the driven link is prevented.
Further, since no spring means is used, there is no problem that causes an increase in the operating force of the door.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described using examples.
1 to 3 are side views of the link mechanism of the vehicle air conditioner, and FIG. 4 is a view as seen from I in FIG.
The duct 1 of the air conditioner shown in this embodiment includes at least two air passage openings 2 and 3 inside, and the two air passage openings 2 and 3 are opened and closed by a plate-like door 4. The door 4 includes a shaft that is rotatably supported by the duct 1, and this shaft is rotated by a link mechanism mounted outside the duct 1.
[0007]
The link mechanism includes a driven plate 5 connected to the shaft of the door 4 and a drive plate 6 that drives the driven plate 5.
As shown in FIG. 1, the driven plate 5 includes a link groove R that branches into grooves A, B, and C starting from a trifurcated branch portion O.
The drive plate 6 is a plate whose rotation range intersects the driven plate 5 and is rotationally driven by an electric motor (not shown).
The drive plate 6 is provided with a pin P that fits into the link groove R. When the drive plate 6 is displaced from one side to the other (FIGS. 2 to 3), the pin P changes from groove A → groove B → groove C. The door 4 closes the air passage port 3 to the rear. Conversely, when the drive plate 6 is displaced from the other to one (FIG. 3 to FIG. 2), the pin P moves in the order of groove C → groove B → groove A, and the door 4 closes the air passage port 2 upward. .
[0008]
When the drive plate 6 is displaced from the other side to one side (FIG. 3 to FIG. 2), when the pin P enters the groove B → the groove A (see FIG. 1), the wind pressure in the duct 1 causes the door 4 to move to FIG. May be pushed in the direction of arrow α. When the door 4 is pushed in the direction of the arrow α, the driven plate 5 also rotates together with the door 4 in the direction of the arrow α, resulting in a problem that the pin P returns to the groove C.
Therefore, in this embodiment, the driven protrusion 5T and the drive protrusion 6T that can contact in the direction of the arrow α of the branch portion O in the positional relationship between the driven plate 5 and the drive plate 6 in which the above-described problem occurs are provided. The driven protrusion 5T is provided integrally with the driven plate 5, and the drive protrusion 6T is provided integrally with the drive plate 6. When a moving force in the direction of the arrow α is applied to the driven plate 5, The driven projection 5T comes into contact with the drive projection 6T to restrict the movement of the driven plate 5 in the arrow α direction (see FIG. 4).
[0009]
As a result, when the pin P passes through the branch portion O (see FIG. 1), the wind pressure in the duct 1 pushes the door 4 in the direction of arrow α in FIG. Even if is added, the driven projection 5T and the driving projection 6T come into contact with each other, and the driven plate 5 is prevented from moving in the direction of the arrow α by the wind pressure.
That is, even if a three-way branch link groove R having a so-called bottle opener shape is adopted, when the pin P passes through the branch portion O, the pin P enters the reverse groove and the link mechanism is There is no problem of locking.
Further, since the spring means for canceling the wind pressure is not used for the door 4, the operation force of the door 4 can be reduced, and the load of the electric motor that drives the drive plate 6 can be suppressed.
[Brief description of the drawings]
FIG. 1 is a side view of a link mechanism in a state where a pin passes through a branch portion.
FIG. 2 is a side view of the link mechanism in a state where the door closes the air passage opening upward.
FIG. 3 is a side view of the link mechanism in a state in which the door closes the rear air passage opening.
4 is a view on I in FIG. 1. FIG.
[Explanation of symbols]
1 Duct 2, 3 Air passage 4 Door 5 Driven plate 5T Driven projection 6 Drive plate 6T Driven projection O Branch P Pin R Link groove

Claims (1)

A duct having an air passage through which an air flow can pass;
A plate-like door that rotates in the duct and can open and close the air passage port;
A driven plate having a link groove formed with a three-branch portion that pivots integrally with the pivot shaft of the door and branches in three directions;
A drive plate that is rotationally driven and includes a pin that fits into the link groove;
In an air conditioner comprising:
The driven plate and the drive plate are provided with a driven projection and a drive projection that can contact when the pin passes through the branch portion,
The air conditioning apparatus, wherein the driven protrusion and the driving protrusion come into contact with each other when the pin passes through the branch portion of the driven plate.

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