JPS60226316A - Hinge structure of air distribution door for air-conditioning unit - Google Patents

Abstract

PURPOSE:To aim at preventing a hinge structure of an air-distribution door for an automobile from having backlash, and at enhancing the sealing ability thereof, by making the shaft part of a hinge lever hollow and by forming axial slits therein to be enlarged in a bearing hole in a unit casing to be made in resilient contact therewith. CONSTITUTION:A hollow part 7 is formed in the shaft part 3a of a hinge lever 3 from one end face to the intermediate section thereof, and a plurality of axially extending slits 8 are formed in the section of the shaft part 3a corresponding to a bearing hole 4a. Further, the shaft part 3a has such an outer diameter that, when the shaft part 3a of the hinge lever 3 is inserted into the bearing hole 4a, it is resiliently made into contact with the inner surface of the hole 4a due to resilent contraction and expansion of the shaft part 3a, and is therefore made in close contact with the bearing hole 4a. With this arrangement, it is possible to prevent the hinge from having backlash and to enhance the sealing ability thereof so that smooth rotation may be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a rotating hinge structure for a distribution door for an air conditioning unit.

B. Prior Art In general, air conditioning units, for example, as shown in Figure 1, automotive heating units/buses, etc., show the rotating hinge structure of these ventilation door appliances such as mix doors, vent doors, foot doors, differential doors, etc. As shown in FIG. In the figure, 3 is a rotating hinge lever, and the shaft part 3
The middle part of the shaft part a is rotatably supported in the bearing hole pa of the unit case, and the tip of the shaft part 3a is inserted and connected to the joint hole Ja1 formed at the end of the rotating shaft core a of the ventilation door 10. An elastic locking pawl 3 is provided at the tip of the shaft portion 3a of the rotating hinge lever 3.
! L1 is formed, and this elastic locking claw Ja--joining hole 2a
The shaft portion 3a is locked in the locking notch Jam formed in the connecting hole Ja1, thereby preventing the shaft portion 3a from coming out from the coupling hole Ja1.

Further, an end of a rod 6 is connected to the free end of the lever portion 3b of the rotary hinge lever 3 via a rod holder j.

Therefore, when an axial force is input to the rod≦, the nuclear force is transmitted to the rotating hinge lever 3 via the rod holder, where the linear motion is converted into a rotational motion and the ventilation door λ
It is a trap so that it can be rotated.

Note that this is a known example of such a rotating hinge structure.
If the clearance of the shaft part 3a is small, the airtightness is good, but the resistance between the shaft part 3& and the bearing hole a becomes large and the operability deteriorates.On the other hand, if the clearance is made large, the resistance is small and the operability is good, but the airtightness is good. It had five contradictory drawbacks, including poor performance. Therefore, the clearance is set at an intermediate value by compromising the two. In other words, the current situation is that the diameter of the bearing hole a must be larger than the diameter of the shaft lJa.

Therefore, there is inevitably some wobbling in the rotating hinge Leno<-3, which causes a rattling sound and is very busy.Since the rotation of the air distribution door is not smooth, more human power is required than necessary, resulting in excessive operating force, and the air distribution door is not smooth. There was a problem that when the door was closed, the airtightness deteriorated and hot air leaked out.

C0 Purpose of the Invention The present invention has been made by focusing on the problems of the conventional art. In order to achieve the above object, the present invention aims to reduce the operating force by smoothing out the operation force, and improve the airtightness of the air distribution door when it is closed. A hollow part is formed in the center of the shaft part of the rotating hinge Leno (-) that is connected to the door, and multiple notches extending in the axial direction are formed in the part corresponding to the bearing hole of the unit case to make it elastic so that it can expand and contract in the radial direction. It is attached to the inner circumferential surface of the shaft portion in an elastic manner.

e. Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings, in which the same parts as those of the conventional art are given the same reference numerals. In the figure, in the rotating hinge Leno<-3, the midway of the shaft portion 3a is rotatably supported in the bearing hole 4ta of the unit case Hiroshi, and the tip of the shaft portion 3a is connected to the rotating shaft of the ventilation door λ, and the joint formed at the end 2a. Hole 2I! It is inserted and coupled to L1. The tip sK of the shaft portion 3a of this rotating hinge Leno<-J is the elastic locking claw 3aM.
is formed, and this elastic locking pawl jal is locked in a locking notch Jat formed in the coupling hole core a.A rod holder is also provided at the free end of the lever lJt+ in the rotating hinge lever 3. The configuration above, in which the throat portion of the rod 6 is connected through, is the same as the conventional one.

The shaft portion 3a of the rotary hinge lever 3 has a hollow portion 7 hollowed out halfway from the end face toward the tip at its center, and extends in the axial direction to a portion corresponding to the bearing hole 4ta of the unit case. Plural examples include Hiromoto's incision, 4. r, r...'k The bearing holes 4t are formed at regular intervals and given elasticity so that they can expand and contract in the radial direction.
It is brought into elastic close contact with the inner circumferential surface of a.

With this configuration, the portion of the shaft portion 3a of the rotary hinge lever 3 corresponding to the bearing hole 4ta changes from the most expanded state as shown in FIG. 6(a) to the position shown in FIG. If the outer diameter of the hinge lever 3 is selected to be an intermediate value between these two, the inner diameter of the bearing hole 4!a will always be maintained due to its elasticity after it is inserted into the bearing hole 4ta. Due to the fact that the shaft portion 3a is in elastic contact with the bearing hole a, the rotary hinge lever 3 and its integrated arrangement are This prevents the wind door from rattling, which eliminates the rattling sound, and makes the ventilation door rotate smoothly 20 times.[The operating force is reduced, and the airtightness of the ventilation door increases, preventing hot air from leaking.] It will become.

In addition, one of the opposing inner edges of each cut r in the hollow part 7 of the shaft part 3a is raised with a button flange so that it overlaps the other side to form a convex part, and the other inner edge of the flange is raised so that the flange parts overlap. Providing a recess in the case further improves airtightness inside and outside the case.

FIG. 7 shows another embodiment of the invention.

In this embodiment, the hollow part 7 is filled with lubricating grease in the previous embodiment, and the opening of the hollow part 7 is closed with a cap 10, which improves rigidity and provides a rotating hinge lever. The elastic force of the shaft portion 3a of No. 3 is strengthened, and the adhesion force with the bearing hole a of the case ring is improved, and the blister filled in the hollow portion 7 makes a cut tftA between the shaft portion 3a and the bearing hole 4ta. It oozes out and lubricates the rotating parts and serves to reduce operating force.

FIG. 2 shows another practical example of the present invention.

This embodiment differs from the first embodiment in that the ventilation door 10
An elastic body such as a suge ring is inserted between the end of the rotating shaft 2a and the inner surface of the case holder via a washer.
This not only prevents the rotational hinge lever 3 from wobbling in the diametrical direction of the shaft portion 3a, but also eliminates wobbling in the axial direction.

f. Effects As explained above, according to the present invention, the rotary hinge lever of the ventilation door has a structure in which the rotary hinge lever has a structure in which it is elastically brought into close contact with the bearing hole of the case, which is the shaft part of the rotary hinge lever. This prevents the ventilation door from rattling, which eliminates the rattling noise, and allows the ventilation door to rotate smoothly (reducing operating force).In addition, it improves airtightness and prevents hot air from leaking. The effect that can be obtained can be obtained.

[Brief explanation of drawings]

Fig. 1 is an explanatory perspective view of the heater unit showing the arrangement of the ventilation door, Fig. 2 is an exploded perspective view showing the rotary hinge mounting structure of a conventional ventilation door, and Fig. 3 is a cross section of the assembled state. Figures 1 and 2 are exploded perspective views showing a rotary hinge mounting structure for a ventilation door according to an embodiment of the present invention. The figure is a sectional view of the assembled state, FIGS. 4(a) and 4(b) are explanatory views of the function of the shaft portion of the rotary hinge lever according to the present invention, and FIG. 7 is a sectional view of another embodiment of the present invention. 2 and 2 are cross-sectional explanatory views of another embodiment of the present invention. /...heater unit, co...ventilation door, 3...
・Rotation h/sireha+, j a...Shaft part, R...Unit case, ga...Bearing hole, ? ...Hollow part?・
...Cut. 11 Representative Patent Attorney Ishido, 1. Gen 1 11.

Claims (1)

[Claims] The shaft of the rotating hinge lever that connects to the ventilation door of the air conditioning unit has a hollow part in the center, and multiple notches extending in the axial direction are formed in the part corresponding to the bearing hole of the unit case to expand and contract in the radial direction. 1. A rotary hinge structure for a ventilation door for an air conditioning unit, characterized in that the hinge is elastically attached to the inner circumferential surface of the shaft portion.