JPH0538965Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to an air conditioner, particularly a link structure used for damper operation in an automobile air conditioner.

b. Prior Art FIGS. 7 and 8 schematically show a conventional link structure for operating a damper used in an automobile air conditioner. In the figure, a is the evaporator case, b is a dog-shaped link lever installed on the side of the evaporator case a to switch between inside and outside air, and c is
d is a damper link that opens and closes the ventilation opening, d is a damper link, e is an operating bar locked to one end of the link lever b, f is an evaporator core, g is an outside air port, and h is an inside air port.

The link lever b is rotatably fitted into a boss i protruding from the evaporator case a, and is fixed by a washer j and a tapping screw k to prevent it from falling off.

The damper link d is provided with guide grooves extending radially in three directions, and is fitted into and guided by a pin m protruding from the link lever b.
The end portion of the damper c is configured to be able to rotate integrally with the end portion of the damper c.

Now, when operating bar e is operated in the direction of the arrow, link lever b swings in the direction of the arrow, damper link d is operated by pin m, damper c swings, and the opening of evaporator case a is opened and closed. I'm starting to do that.

c Problems to be solved by the invention As mentioned above, the link lever b is rotatably fitted into the boss i protruding from the wall of the evaporator case a, and the washer j and tapping screw k are connected to each other. This prevents the link lever b from slipping out, but since this configuration uses the tapping screw k to hold down the washer j, the tightening torque is insufficient.
There is a problem that the number of parts is relatively large.

The present invention was developed in view of the above circumstances, and provides a link structure for an air conditioner that eliminates the problems of the conventional structure, completely retains the link lever, and reduces costs by eliminating the number of parts. This is what I am trying to do.

d Means for Solving the Problems In order to solve the above problems, the present invention provides a rotatable link lever on the shaft, and inserts a pin protruding from the tip of the link lever into the guide groove of the damper link. In the air conditioner, a damper linked to a damper link is opened and closed by engaging the link lever and rotating the link lever, wherein the shaft portion and the link lever are fitted into the shaft portion. The hole is provided with a protrusion and a notch that are fitted together outside the operating area of the link lever, and further, the damper link is configured to allow the pin to engage with the damper link outside the operating area of the link lever. A guide groove is provided extending in the guide groove, and a hook is provided on a wall surface of the guide groove on a side farther from the shaft portion, and gradually projects into the groove from the tip side.

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

In Figures 1 to 4, 1 is a link lever;
2 is a damper link that operates in the same way as the conventional device,
Reference numeral 3 denotes an evaporator case, and 4 a boss protruding from the evaporator case 3. The boss 4 serves as a shaft portion that rotatably supports the link lever 1. As shown in FIG. 3, the link lever 1 is provided with a fitting hole 11 into which the boss 4 is fitted, and an appropriate number of notches 12 (in the embodiment, a pair at opposing positions) are provided around the fitting hole 11. There is. Also, a pin 13 is provided at the end to engage with the damper link 2, as in the conventional position.

On the other hand, the boss 4 provided on the evaporator case 3 includes a protrusion 16. The same number of protrusions 16 are provided so as to correspond to and fit into the notches 12 provided in the fitting hole 11 of the link lever 1.

The damper link 2 has a groove 2 into which the pin 13 of the link lever 1 is inserted and guided, as shown in FIG.
1 is extended in three directions like the conventional device,
Particularly, in the present invention, the groove in one direction is extended outward, and a hook 22 is formed at the end thereof, gradually sloping from the tip side and protruding into the groove, and a locking surface 23 is provided. In addition, at the tip of the hook 22, pin 1
3 is the width of the groove that can barely be passed through.

To fit the above link lever 1, first,
Place the link lever 1 at the position shown by the chain line in FIG. 11 notches 1
2 and the protrusion 16 on the boss 4 of the evaporator case 3, and insert the boss 4 as shown in FIG. 3().

Next, the link lever 1 is rotated in the direction of the arrow as shown in FIG. 16, so that the link lever 1 is aligned with the boss 4.
It is a state in which you cannot escape. This allows pin 1
Even if the hook 3 tries to return in the opposite direction, it is blocked by the locking surface 23 of the hook 22 and cannot move toward the tip within the groove 21. Therefore, the notch 12 of the link lever 1 and the protrusion 16 of the boss 4 return to the state shown in FIG.
will not fall off from Boss 4. In addition, position M
-N is link lever 1 after link lever 1 is fitted.
Indicates the operating range (rotation range) of the

In addition, to explain the operation of the link structure in detail, first, when the link lever 1 is moved in the direction of position N, the damper link 2 is also rotated upward in conjunction with the movement. That is, in the state shown in FIG.
1a) and moves into the groove 21 in the actuation area of the link lever 1 while rotating the damper link 2 upward.

On the other hand, when the link lever 1 is moved from the operating area in the opposite direction to position M, the damper link also rotates in the opposite direction, and the pin 13 is moved from the wall of the groove on the far side from the boss 4 (the groove 21 in FIG. 4). Left wall surface 21b)
descend along the Therefore, it comes into contact with the locking surface 23 of the hook 22 protruding into the groove 21, and is locked without being able to descend any further, making it impossible to move out of the operating range where the link lever is released. but,
In this state, if you push the damper link 2 in the direction of arrow P with your fingertips, the pin 13 will come off the locking surface and move out of the operating range of the link lever 1, releasing the locked state and easily removing the link lever. can.

e Effects of the invention As described above, according to the link structure of the air conditioner according to the invention, the protrusion is simply attached to the shaft and the link lever is provided with a protrusion, without using washers or tapping screws as in the conventional structure. By providing a notch that fits into the link lever and a separate locking part, the link lever can be fitted and held in a more perfect state, and the number of parts and assembly man-hours can be reduced, resulting in a cost reduction effect. .

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of the link lever part of the air conditioner according to the present invention, Fig. 2 is an enlarged explanatory diagram of the cross section taken along line A-A in Fig. 1, and Figs. 3 () and () are the link lever part. FIG. 4 is an enlarged illustration of the engagement state of the link lever and damper link, FIG. 5 is a schematic illustration of the conventional device, and FIG. FIG. 2 is an enlarged explanatory view of a cross section taken along line E-E in the figure. 1... Link lever, 2... Damper link,
12...Notch, 16...Protrusion.

Claims (1)

[Scope of utility model registration request] A rotatable link lever is provided on the shaft, a pin protruding from the tip of the link lever is engaged with a guide groove of the damper link, and the link lever is rotated to interlock with the damper link. In an air conditioner that opens and closes a damper that
The shaft portion and the fitting hole of the link lever that fits into the shaft portion are provided with a protrusion portion and a notch portion that coincide with each other outside the operating area of the link lever, and further,
In the damper link, a guide groove is provided to extend beyond the operating area of the link lever so that the pin can be engaged, and a groove is gradually formed in the wall surface of the guide groove on the side farther from the shaft part from the tip side. A link structure for an air conditioner characterized by having a hook-like lock part that projects inward.