JP4038946B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
[Industrial field to which the invention pertains]
The present invention relates to an air conditioner for a vehicle, and more particularly to an apparatus for switching an air passage at an air conditioning door.
[0002]
[Prior art]
As a conventional technique, Japanese Patent Laid-Open No. 10-58947 is known. That is, as shown in FIG. 12, the door lever 13 is fixed to one of the rotating shafts 11 d of the rotary door 11 that switches the air passage in the case 1, and is provided outside the case 1. One end of a cable 14 is connected to the end of the door lever 13, and the other end of the cable 14 is connected to a blow mode switching lever provided on an air conditioning control panel (not shown) in the passenger compartment. Thereby, the rotary door 11 is rotationally displaced in the rotation directions D and E based on manual operation of the blowing mode switching lever.
[0003]
In addition, when the door lever 13 exceeds a predetermined rotation area by manual operation of the blow mode switching lever, air leakage from the air passage openings 5, 6 and 7 occurs. There is provided a stopper 16 that contacts at a position exceeding.
[0004]
[Problems to be solved by the invention]
However, when an occupant or the like operates the blow mode switching lever vigorously, the door lever 13 hits the stopper 16 due to the slack of the cable 14 in the outer cable 14a and the inertial force of the rotary door 11, and the door lever 13 generates a hammering sound. To do. Further, when the film member 12 is provided on the outer peripheral side of the rotary door 11, the chatter sound of the film member 12 is generated by the impact of the door lever 13 hit.
[0005]
Therefore, as a countermeasure, the door lever 13 is provided with a link mechanism to suppress the rotation speed toward both ends of the rotation area, or an elastic body such as a leaf spring is interposed between the door lever 13 and the stopper 16 for impact. Although it is possible to absorb force, it leads to an increase in the number of parts and assembly man-hours, which is not preferable.
[0006]
Note that the above problem is not a problem peculiar to rotary type air conditioning doors that switch the blowing mode, but other doors (plate door type blowing mode switching doors, air mix doors, inside / outside air switching doors, sliding doors, etc.) Needless to say, this also occurs.
[0007]
In view of the above, an object of the present invention is to provide a vehicle air conditioner that has a relatively simple structure and can prevent noise generated when a door switching lever is operated.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention employs the following technical means.
[0009]
According to the first aspect of the present invention, the air conditioning door is rotatably disposed in the case forming the air passage, and the air conditioning door rotates in conjunction with the operation of the door switching lever in the vehicle interior. In the vehicle air conditioner for switching the air passage in the case,
A door lever provided on the outside of the case, the base end side being fixed to the rotating shaft of the air conditioning door, and the distal end side extending in a direction perpendicular to the rotating shaft;
Corresponding to the rotation area of this door lever, with a case rib protruding in the direction of the rotation axis on the outside of the case,
On the distal end side of the door lever , have an elastic part formed by curving a part of the door lever or partially reducing the cross-sectional area of the door lever ,
Tip of the door lever further comprising a distal end side than the elastic portion is adapted to elastically deform in the axial direction,
The front end portion of the door lever is in contact with the protruding end portion of the case rib and is slid in a state of being pressed with elasticity.
Thereby, the door lever is braked at the maximum rotation position of the door lever by the sliding resistance between the door lever and the case rib, and a sound generated when the door switching lever is operated can be prevented.
[0012]
The invention according to claim 2 is characterized in that an uneven portion for engaging the door lever and the case rib is provided in a specific portion of the rotation region of the door lever.
By engaging the concavo-convex portion, a click feeling that the door lever stop position at each door position is reliably determined and the position of each door can be recognized by hand in the operation of the door switching lever can be obtained.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
1 to 3 show a first embodiment of the present invention, which is applied to a rotary type air conditioning door that switches a blowing mode. FIG. 1 shows the overall structure of the ventilation system in the vehicle air conditioner, FIG. 2 is a perspective view showing the structure of the rotary door 11, and FIG. 3 is a perspective view and a sectional view showing the vicinity of the door lever 13.
[0014]
In FIG. 1, a resin case 1 constitutes an air passage of an air conditioner, and the case 1 is usually installed in an instrument panel in the front part of a vehicle interior. In the case 1, a blower 2 is installed as a blowing means. The blower 2 is constituted by a centrifugal multiblade fan driven by a motor, and sucks air into the case 1 through an intake side duct (not shown) connected to the case 1 and blows it in the direction of arrow A. Yes.
[0015]
A heater core 3 as a heating means is disposed in the case 1 in a substantially horizontal direction. The heater core 3 is a heating heat exchanger that heats blown air using vehicle engine coolant (not shown) as a heat source.
[0016]
An air mix door 4 is provided in the upstream air portion of the heater core 3. The air mix door 4 is a temperature control means, and controls the temperature of air blown into the vehicle interior by rotating in the direction of arrow X about the rotation shaft 4a. The air mix door 4 is adjusted to an opening degree corresponding to the air conditioning condition by a passenger's manual operation or an automatic temperature control signal of the air conditioning control device.
[0017]
Of the air blown in the direction of arrow A by the blower 2 according to the opening of the air mix door 4, the warm air flowing in the hot air passage 100 in the direction of arrow B through the heater core 3 and the heater core 3 are bypassed. Then, the air volume ratio of the cold air flowing in the direction of arrow C through the cold air passage 101 is adjusted.
[0018]
In most cases, the hot air and the cold air flowing through both the passages 100 and 101 flow into a semi-cylindrical rotary door 11 described later, and are well air-mixed. The flat end surface side of the semi-cylindrical rotary door 11 is provided with an air inflow surface 11a that opens entirely, and the blown air flows into the rotary door 11 from the air inflow surface 11a.
[0019]
On the other hand, in the case 1, the three air passage openings 5, 6, and 7 are provided so as to be adjacent to each other along the rotation direction of the rotary door 11 in the area where the rotary door 11 rotates, which will be described later. It has been. The tip of the partition wall forming the air passage openings 5, 6, 7 is formed in an arcuate surface, and the blown air openings 5, 6, 7 are opened in an arc shape. Moreover, it forms in the substantially rectangular shape which made the direction which went to the back surface from the paper surface of FIG. 1 the longitudinal direction.
[0020]
As shown in FIG. 2, the rotary door 11 is made of, for example, resin and has a vertically divided semi-cylindrical shape, and the air between the flat end surfaces of the two end plate portions 11 b is opened to the entire surface. An inflow surface 11a is formed. The end plate portion 11b is provided with a rotating shaft 11d that protrudes outward in the axial direction. A door vent 11c is formed in the circumferential wall 11e. A plurality of pin members 11f and 11g for attaching the film member 12 are provided at both ends of the circumferential wall 11e in the circumferential direction. In addition, elastic sealing material 11h is bonded to the both ends of the circumferential wall 11e in the axial direction over substantially the entire circumference.
[0021]
The film member 12 is formed of a resin material having flexibility, no air permeability, and low frictional resistance. The film member 12 is used by bending a rectangular shape into an arc shape. A film opening 12a that always communicates with the door ventilation opening 11c is formed in the middle portion of the film member 12 in the circumferential direction. A plurality of mounting holes 12b are formed at the right end of the film member 12 in the circumferential direction, and a plurality of slide holes 12c are formed at the left end. The mounting hole 12b and the slide hole 12c are fitted to the pin members 11f and 11g of the rotary door 11, respectively, and the heads of the pin members 11f and 11g are caulked to assemble the film member 12 and the rotary door 11.
[0022]
The rotary door 11 configured as described above has the rotating shaft 11d aligned with the center of curvature of the arcuate inner wall surface in which the air passage openings 5, 6, and 7 of the case 1 are arranged. In this case, as shown in FIG. 1, a door lever 13 is fixed to the outside of the case 1 on one end of the rotating shaft 11d, and one end of the cable 14 is attached to the end of the door lever 13. Is connected. The other end of the cable 14 is connected to a blow mode switching lever provided on an air conditioning control panel (not shown). Thereby, the rotary door 11 is rotationally displaced in the rotational directions D and E based on the manual operation of the blowing mode switching lever.
[0023]
As shown in FIG. 3, an elastic portion 13 a is provided at the substantially distal end portion of the door lever 13, and a case rib 15 that contacts the distal end portion 13 b of the door lever 13 is provided so as to protrude to the outside of the case 1. The door lever tip 13b and the case rib 15 are in contact with each other. Specifically, the front end side of the door lever 13 is curved and the cross-sectional area is gradually reduced toward the front end so that elasticity is provided in the direction of the rotary shaft 11d of the rotary door 11. The case rib 15 has the same curvature as that of the rotation of the door lever 13, has a rib height h so as to come into contact with the distal end portion 13 b of the door lever 13 in the direction of the rotating shaft 11 d of the rotary door 11, and is integrated with the case 1. Molded.
[0024]
With the above configuration, the distal end portion 13b of the door lever 13 is pressed by the case rib 15 by the elastic portion 13a, and the rotary door end plate portion 11b is also pressed by the rotary door support portion 1a of the case 1, so that the door lever 13 and the rotary door 11 slide. When you do, you will have sliding resistance. Even if the blowing mode switching lever is vigorously operated by setting the elastic portion 13a and the rib height h so that the sliding resistance at this time is substantially equal to or less than the maximum operating force of the blowing mode switching lever, With an inexpensive configuration without interposing an elastic body such as a link mechanism or a leaf spring, the rotation speed of the door lever 13 is suppressed, the door lever 13 is braked at the maximum rotation position of the door lever 13, and the blow mode switching lever is operated. The generated sound can be prevented. In this case, the conventional stopper 16 is not functionally required.
[0025]
4 to 6 show modified examples of the elastic portion 13a of the door lever 13. FIG. FIG. 4 shows an example in which the cross-sectional area of the door lever 13 is partially reduced to have an elastic portion 13c. FIG. 5 shows a case where a part of the door lever 13 is curved to have an elastic portion 13d. In FIG. 6, a thin elastic portion 13 j is provided at a substantially central portion of the door lever 13 to shorten the overall length of the door lever 13. FIG. 7 shows a modified example of the case rib 15, in which a convex shape due to punching is used instead of a thick convex shape.
(Second Embodiment)
FIG. 8 shows a second embodiment of the present invention. The rib height h of the case rib 15 in FIG. 3 is directed toward both ends of the rotating region of the door lever 13 so that the rib height h1 is smoothly changed to h2. It has been changed. As a result, by gradually increasing the pressing force of the door lever 13 toward both ends of the rotation region, the sliding resistance can be increased and both ends can be braked more effectively. Thereby, the door lever 13 is braked at the maximum rotation position of the door lever 13, and the sound generated when the blow mode switching lever is operated can be prevented. In this case, the rib height h2 is set so that the sliding resistance with the door lever 13 is substantially equal to or less than the maximum operating force of the blowing mode switching lever, and the rib height h1 is set with the sliding resistance with the door lever 13. Set it so that it is less than the normal operating force of the mode switching lever. As a result, it is possible to prevent the sound generated when the blow mode switching lever is operated without impairing the operability of the blow mode switching lever.
(Third embodiment)
9 to 11 show a third embodiment of the present invention. In addition to the configurations of the first embodiment and the second embodiment described above, an uneven portion that lightly engages the door lever 13 and the case rib 15 is provided at a specific portion of the rotation region of the door lever 13. Thereby, the door lever 13 can be braked at the maximum rotation position of the door lever 13 to prevent a sound generated when the blow mode switching lever is operated. Further, when the concave and convex portions are lightly engaged, The stop position of the door lever 13 at each door position is surely determined, and the operational click feeling that the position of each door can be recognized by hand is obtained.
[0026]
In FIG. 9, the front end portion of the door lever 13 is bent in a right angle direction to have an elastic portion 13e, while the case rib 15 has a radius of curvature R2 smaller than the radius of curvature R1 of the door lever 13 and the door lever 13 rotates. The sliding resistance is increased toward both ends of the region, and the sound generated when the blow mode switching lever is operated can be prevented. In addition, a protrusion 13f is provided at the front end of the door lever 13, and a groove 15a is provided at each door lever position on the case rib 15. By lightly engaging both, a click feeling when operating the blowing mode switching lever can be obtained. In particular, if uneven portions are provided on both ends of the rotation region of the door lever 13, sound prevention and a click feeling can be obtained, which is more effective.
[0027]
FIG. 10 is a modified example in which the concavo-convex portion is reversed with respect to FIG. 11, FIG. 9 is reversed with respect to FIG. 9, the groove 13i is provided at the tip of the door lever 13, the protrusion 15c is provided on the case rib 15, and the rotary door 11 is engaged in the direction of the rotating shaft 11d. In both of these modifications, the same effect as in FIG. 9 can be obtained.
(Other embodiments)
The present invention is not limited to the rotary type air conditioning door for switching the above-described blowing mode, but is a plate door type blowing mode switching door, an air mix door, an inside / outside air switching door, or a slide by a manually operated door switching lever. It can be similarly applied to a type door or the like, and the same effect can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view showing an overall configuration of a first embodiment of the present invention.
FIG. 2 is an exploded perspective view showing a rotary door.
3A and 3B show the periphery of a door lever, where FIG. 3A is a perspective view and FIG. 3B is a cross-sectional view.
FIG. 4 is a cross-sectional view showing a modification of the door lever.
FIG. 5 is a cross-sectional view showing a modification of the door lever.
6A and 6B show a modification of the door lever, where FIG. 6A is a front view and FIG. 6B is a cross-sectional view.
FIG. 7 is a cross-sectional view showing a modified example of the case rib.
FIGS. 8A and 8B show the periphery of a door lever according to a second embodiment of the present invention, where FIG. 8A is a perspective view and FIG. 8B is a bottom view.
FIGS. 9A and 9B show the periphery of a door lever according to a third embodiment of the present invention, where FIG. 9A is a front view and FIG. 9B is a side view.
FIG. 10 shows a modified example around the door lever according to the third embodiment of the present invention, in which (a) is a front view and (b) is a side view.
11A and 11B show a modified example around the door lever according to the third embodiment of the present invention, in which FIG. 11A is a bottom view and FIG. 11C is a perspective view.
12A and 12B show a conventional technique, in which FIG. 12A is a front view showing an overall configuration, and FIG. 12B is a perspective view showing the periphery of a door lever.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case 1a Rotary door support part 2 Blower 3 Heat exchanger 4 Air mix door 4a Rotating shaft 5, 6, 7 Air passage opening part 11 Rotary door (air conditioning door)
11a Air inflow surface 11b End plate part 11c Door ventilation port 11d Rotating shaft 12 Film member 12a Film opening part 13 Door lever 13a Elastic part 13b Tip part 14 Cable 15 Case rib h Rib height

Claims (2)

A case forming an air passage,
An air conditioning door that is rotatably disposed in the case and switches an air passage in the case;
In conjunction with this air conditioning door, a door switching lever that rotates the air conditioning door;
A door lever provided on the outside of the case, the base end side being fixed to the rotating shaft of the air conditioning door, and the distal end side extending in a direction perpendicular to the rotating shaft;
Corresponding to the rotation region of this door lever, provided on the outside of the case with a case rib protruding in the rotation axis direction,
The front end side of the door lever has an elastic portion formed by curving a part of the door lever or reducing a cross-sectional area of the door lever partially ,
Tip of the door lever further comprising a distal end side of the elastic portion so as to elastically deform in the axial direction,
The distal end of the door lever contacts the projecting end of the Kesuribu, air conditioning system is characterized in that so as to slide the pressed state with elasticity. The vehicle air conditioner according to claim 1 , wherein an uneven portion that engages the door lever and the case rib is provided at a specific portion of a rotation region of the door lever.

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