JPH0478492B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a door opening/closing structure for an automobile ventilator provided for blowing air into a vehicle interior.

(b) Conventional technology and problems Regarding the door opening/closing structure of conventional automobile ventilators, the service bulletin published by Nissan Motor Co., Ltd.
486, August 1986), page 45, there are examples such as those shown in FIGS. 1 to 3.

Four ventilators 1 are attached to the front of the instrument panel 2 for easy operation and for effectively blowing air into the vehicle interior. The part of the ventilator 1 that comes out from the instrument panel 2, that is, the front case 3, which is also the air blowing part, has vertical louvers 4 that change the air blowing direction left and right, and horizontal louvers 5 that change the air blowing direction up and down in a grid pattern. It is arranged. The vertical louver 4 and the horizontal louver 5 are arranged to interlock with an operation knob 6.
By tilting the operating knob 6, the angle of the operating knob 6 is changed in accordance with the direction in which the operating knob 6 is tilted, and the direction of air blown out from the ventilator 1 can be arbitrarily changed. Also, front case 3
A rectangular operation section opening 7 is also provided, and a part of an operation dial 8 serving as an "operation section" protrudes from the front case 3 through this operation section opening 7. The operation dial 8 is rotatably mounted within a certain rotation angle range about a rotation shaft 10 provided perpendicularly to the side surface of the rear case 9, which has a rectangular tube shape and is also an air passage. The part of the operation dial 8 that comes out from the operation part opening 7 of the front case 3 is the edge 12 of the semicircular feeding part 11 to which the operator directly applies force with his/her hand. has a knurled shape to prevent slipping to facilitate operation by the operator. Further, this feeding portion 11 is provided with an arc-shaped guide elongated hole 13 having a length corresponding to a predetermined rotation angle range of the operation dial 8, and an open end of this arc-shaped guide elongated hole 13 is provided. Convex part 1 near 14 to increase the sense of moderation
5 is provided. Furthermore, a guide pin 16, which is provided perpendicularly to the side surface of the rear case 9 in the same manner as the rotation shaft 10 of the operation dial 8, is inserted into the guide elongated hole 13. On the other hand, a transmission section 17 extends on the opposite side of the sending section 11 across the rotation shaft 10, and a connecting elongated hole 18 is provided at the tip thereof.

Reference numeral 19 denotes a door, which can be rotated and opened/closed about an opening/closing shaft 21 fixed to the bottom surface 20 of the rear case 9 under a constant opening/closing torque. Seal rubber 22 is bonded to the tip of the door 19 and near the opening/closing shaft 21, respectively, in order to improve the sealing performance when the door 19 is closed. There is a semicircular inner hole 23 in the opening/closing shaft 21 of the door 19 , and a fixed shaft 25 provided perpendicularly to one end of the arm 24 is fitted into this inner hole 23 to attach the arm 24 to the door 19 . It is fixed integrally at a certain angle. Arm 24
A door-side connecting shaft 26 is attached at right angles to the other end facing in the opposite direction to the fixed shaft 25, and this door-side connecting shaft 26 is connected to the operation dial 8.
It is reciprocatably engaged in a connecting elongated hole 18 provided in a transmission section 17. Note that 27 is an air inlet, 28 is a duct, and 29 is an air flow.

In order to open the door 19 of the ventilator 1 from the currently closed state, the operation dial 8 is first rotated in the opening direction (direction of arrow A in FIG. 3). Then, the rotational output at this time is transmitted to the door side connecting shaft 26 in the connecting slot 18 via the transmission part 17, so the arm 24 is raised, and as a result, it is integrally fixed to the arm 24 at a certain angle. The door 19 begins to fall down (open) centering on the opening/closing shaft 21. The operation dial 8 is
The tip of the door 19 contacts the bottom surface 20 of the rear case 9, and the guide pin 16 rotates within the guide slot 13 until it passes over the protrusion 15 and contacts the open end 14. As the guide pin 16 passes over this convex portion 15, the operation dial 8 can be operated with a sense of moderation. Furthermore, since a certain opening/closing torque is applied to the door 19, by fixing the door 19 at an arbitrary angle, the degree of opening of the door 19 can be adjusted and the volume of air blown out can be changed. The opening/closing torque applied to the door 19 is the moment generated by the wind pressure of the air flow 29 passing through the air inlet 27 at the tip of the door 19 when the door 19 is open.
This prevents the door 19 from rotating in the closing direction [direction of arrow D in Figure 3] due to Mo, and also serves to prevent the door 19 from wobbling in the open and closed states. It is something. Further, in order to close the door 19 in the open state again, the operation dial 8 may be rotated in the closing direction [in the direction of arrow B in FIG. 3].

However, in the door opening/closing structure of such a conventional automobile ventilator, the door 19 rotates in the closing direction D due to wind pressure when the door 19 is fully opened, and the door 19 rattles in the open/closed state. Since the prevention relied solely on the opening/closing torque applied to the door 19, when the volume of air blown out was increased, the applied opening/closing torque was overcome by the moment Mo caused by the wind pressure and the door 19 closed. There was a tendency for the door 19 to rattle. To prevent this, if the opening/closing torque of the door 19 is set large, the operating force of the operation dial 8 to open/close the door 19 [force required for operation]
The door 19 also becomes larger, making it difficult to open and close the door 19, which is undesirable. In addition, when the door opening/closing structure of a conventional automobile ventilator is used for a long time, the protrusion 1 provided in the guide slot 13 of the operation dial 8
5 becomes worn out, so that the sense of moderation when opening and closing the door 19 gradually decreases.

(c) Purpose This invention was made by focusing on such conventional technology, and it is possible to easily and reliably fix the door in the fully open and closed states, and also to prevent the door from wobbling and to be used for a long period of time. It is an object of the present invention to provide a door opening/closing structure for an automobile ventilator that allows a comfortable opening/closing operation.

(D) Structure In order to achieve the above object, the door opening/closing structure for an automobile ventilator according to the present invention has an operating part that can be rotated back and forth only within a certain angle range around the rotation axis, and an operating part that can be opened and closed around the opening/closing axis. In a door opening/closing structure for an automobile ventilator in which a movable door is connected by a link and the door is opened and closed according to the rotational direction of an operating section, when the door is fully opened, the connecting fulcrum on the operating section side of the link is , the opening rotation direction of the operation section is located at a position closer to the straight line connecting the door-side connection fulcrum of the link and the rotation fulcrum of the operation section.

(e) Examples This invention will be explained below based on the drawings. still,
In the following, the same reference numerals are given to the parts common to the conventional one, and explanations and illustrations of the overlapping parts are omitted.

FIGS. 4a to 4c and 5 are diagrams showing an embodiment of the present invention.

Projections 30 are provided at the upper and lower ends of the operating section opening 7 of the front case 3, respectively, toward the rear case 9 side. and the closing direction B of the knurled edge 12 of the operation dial 8.
A closing side stopper 31 and an opening side stopper 32 protruding from the edge 12 are provided at the side ends, respectively.
are formed so that they come into contact with the projections 30 when the door 19 is fully opened and closed. Therefore, this operation dial 8 can only be rotated back and forth within a certain angular range. Further, the closing side stopper 31 is provided with an operating section side connecting shaft 33, and this operating section side connecting shaft 33 and the door side connecting shaft 26 provided on the arm 24 are connected by a link 34 made of resin.
The link 34 has a generally spanner-like shape as a whole, and has fitting portions 35 at both ends with an inner diameter corresponding to the outer diameter of the operating unit side connecting shaft 33 and the door side connecting shaft 26.
The fitting portion 35 is fitted onto the operating section side connecting shaft 33 and the door side connecting shaft 26 to connect the operating dial 8 and the arm 24. Further, the opening/closing shaft 21 of the door 19 is fixed at a position with a slight gap h from the bottom surface 20 of the rear case 9 with an opening/closing torque applied thereto. In addition, the center point of the rotation axis 10,
That is, the center point of the rotation operation is the rotation fulcrum α, and the center point of the operation unit side connecting shaft 33, which is also the force transmission point between the operation dial 8 and the link 34, is the operation unit side connection fulcrum β, and the door side The center point of the connecting shaft 26 is shown as the door side connecting fulcrum γ.

Next, the action will be explained.

To open the door 19 from the currently closed state (FIG. 4a), first rotate the operating dial 8 as the "operating section" in the opening direction (direction of arrow A in FIG. 4). Then, the rotational output at this time is
The door side connecting shaft 2 of the arm 24 is connected to the operating section side connecting shaft 33 of the closing side stopper 31 via the link 34.
6 and rotates the arm 24 toward the air inlet 27. As a result, the door 19, which is integrally fixed to the arm 24 at a certain angle, begins to fall (open) about the opening/closing shaft 21. Then, when turning the operation dial 8 in the opening direction A, the door 1
9 gradually opens, but the rotation fulcrum α of the rotation shaft 10 and the operating unit side connecting shafts 33 at both ends of the link 34
When the operation unit side connection fulcrum β and the door side connection fulcrum γ of the door side connection shaft 26 are lined up in a straight line, that is, the operation unit side connection fulcrum β connects the rotation fulcrum α and the door side connection fulcrum γ. When the door 19 is positioned on the connecting straight line C (see FIG. 5), the door 19 temporarily stops rotating in the opening direction. At this time, the tip of the door 19 is close enough to come into contact with the bottom surface 22 of the rear case 9.
Then, when the operation dial 8 is further turned in the opening direction A, the door 19 begins to rotate in the opposite direction in the closing direction [in the direction of arrow D in FIG. 4]. The change in the operating feel at this time gives the operator a pleasant sense of control. As soon as the door 19 begins to rotate in the closing direction D, the opening side stopper 32 of the operation dial 8 hits the protrusion 30 of the front case 9, so the rotation of the operation dial 8 in the closing direction B is only slight. becomes. When the door 19 is fully opened in this way, the operation part side connection fulcrum β of the link 34 is more than the position on the straight line C connecting the rotation fulcrum α of the rotation shaft 10 and the door side connection fulcrum γ of the link 34. Since the dial 8 is located in the opening direction A, the moment Mo that attempts to rotate the door 19 in the closing direction D due to the wind pressure applied to the tip of the door 19 moves the operation dial 8 further in the opening direction A.
However, since the rotation is restricted by the opening side stopper 32, the door 19 will not close by itself unless the operation dial 8 is turned in the closing direction B.

FIGS. 6a to 6c and 7 are diagrams showing other embodiments of the present invention.

The ventilator 1 of this embodiment employs an elastic leaf spring for the link 34, and the opening/closing shaft 2 of the door 19
1 is fixed to the bottom surface 20 of the rear case 9 without any gaps. Then, the door 19 of such a ventilator 1 is closed [Fig. 6a]
When the operating dial 8 is turned in the opening direction A to open the link 34, the operating part side connection fulcrum β of the link 34 is on the straight line C connecting the rotation fulcrum α of the rotation shaft 10 and the door side connection fulcrum γ of the link 34. Before the door 19 reaches the bottom (that is, when the operating unit side connection fulcrum β is still located on the closing direction B side of the operating dial 8), the door 19 comes into contact with the bottom surface 20 of the rear case 9, and the operating force on the operating dial 8 becomes somewhat large. Become. Then, as the operating dial 8 is further turned, when the connecting fulcrum β on the operating section side of the link 34 is located on the straight line C [FIG. 6b], the link 34 receives force from the operating dial 8 in the longitudinal direction, so it bends. The state will be as follows. Then, when the operating dial 8 is further turned in the opening direction A, the operating section side connection fulcrum β of the link 34 is located on the opening direction A side rather than on the straight line C, and the operating dial 8 is moved by the elastic restoring force of the bent link 34. Since the force is applied in the opening direction A, the operating force changes (decreases). This change in operating force allows the operator to operate the operating dial 8 with a sense of moderation. As soon as the operating force changes in this way, the opening side stopper 3 of the operating dial 8 is moved.
2 comes into contact with the protrusion 30 of the front case 3, and the door 19 is fixed in the fully open state (FIG. 6c).
At this time, the link 34 is still somewhat bent and the door 19
is pressed against the bottom surface 20 of the rear case 9. The other configurations and functions are the same as those in the previous embodiment, and their explanations will be omitted. In addition to the plate spring, the link 34 may be a resin integrally molded product having ribs or slits and having elastic force in the bending direction in order to adjust the operating force and the pressing force against the bottom surface 20 of the door 19. Alternatively, a spring or the like having elasticity that expands and contracts in the longitudinal direction can be used. Furthermore, instead of using a member having elastic force, the door 19 and the arm 24 may be connected using a spring or the like so that the angle formed by the door 19 and the arm 24 itself has a restoring force. may be directly connected to the door 19 without using the arm 24.

(F) Effects Since the door opening/closing structure of the automobile ventilator according to the present invention has the contents as described above, the following effects can be expected.

(a) The door can be prevented from closing due to wind pressure when the door is fully opened, (b) The door is pressed against the rear case when the door is fully opened, so the door does not rattle, and (c) The door can be operated with a sense of moderation even after long periods of use. (d) The operating force and the force of pressing the door against the rear case can be adjusted by replacing the link.

[Brief explanation of the drawing]

Figure 1 is an overall front view of the instrument panel with a conventional automobile ventilator installed;
The figure is a front view of a conventional ventilator, FIG. 3 is a sectional view taken along the arrow line in FIG. 2 showing the door opening/closing structure of a conventional automobile ventilator, and FIG. Figure 4b is a cross-sectional view equivalent to Figure 3 showing the state when the door is closed, Figure 4b is a cross-sectional view equivalent to Figure 3 showing the operating unit side connection fulcrum positioned on straight line C, and Figure 4c is the door fully open. FIG. 5 is a diagram illustrating the principle of the opening/closing operation of the door shown in FIGS. 4 a to c, and FIG. 6 a is a cross-sectional view corresponding to FIG. Cross-sectional view equivalent to Figure 4a, Figure 6b
6 is a sectional view corresponding to FIG. 4b, FIG. 6c is a sectional view corresponding to FIG. 4c, and FIG. 7 is a principle explanatory diagram corresponding to FIG. 5. 1... Ventilator, 8... Operation dial (operation unit), 19... Door, 21... Opening/closing shaft, 34... Link,
α...Rotation fulcrum, β...Connection fulcrum on the operating section side, γ...Connection fulcrum on the door side, A...Opening direction of the operating section, B...Closing direction of the operating section, C...straight line, D...closing direction of the door, h... Gap, Mo...moment.

Claims (1)

[Scope of Claims] 1. An operating section that can reciprocate only within a certain angular range about a rotation axis and a door that can open and close about an opening/closing axis are connected by a link, and the door is connected to the operating section. In the door opening/closing structure of an automobile ventilator that opens and closes according to the direction of rotation, when the door is fully opened, the connecting fulcrum on the operating section side of the link is a straight line connecting the connecting fulcrum on the door side of the link and the rotating fulcrum of the operating section. A door opening/closing structure for an automobile ventilator, characterized in that the door opening/closing structure of an automobile ventilator is located at a position closer to the opening rotation direction of the operating part.