JPH0336408Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a link device for controlling a heater used in a vehicle air conditioning system.

BACKGROUND TECHNOLOGY As shown in FIG. 3, in a conventional link device of this type, a main link 1 is integrally connected to a mode switching lever 3, and is linked with rotation of the mode switching lever 3 in the horizontal direction. It's summery. The mode switching lever 3 protrudes from the heater control panel provided at the position indicated by the chain line 2, and is installed so as to be able to move between the three modes displayed on the panel: ventilation and heat defroster. The main link 1 is rotatable about a shaft 4 fixed to the vehicle body, and is connected via an intermediate link 6 to a heat damper link 5 connected to a heat damper. The heat damper link 5 is interlocked with a heat damper (not shown), and is supported on the vehicle body side by a shaft installed parallel to the shaft 4.

When the mode switching lever 3 is moved from the ventilation mode position to the heat damper position, the main link 1, intermediate link 6, and heat damper link 5 rotate from the solid line position to the broken line position in FIG. will open a duct (not shown). At this time, the main link 1 and the intermediate link 6 are located on a straight line, and the heat damper link 5 rotates to the left. Furthermore, when moved from the heat mode position to the defroster mode position, the main link 1 and intermediate link 6 rotate to the chain line position, and the heat damper link 5 rotates clockwise and returns to the position shown by the solid line above. As a result, the heat damper closes the duct again.

In the conventional link device described above, the position where the heat damper is fully opened is the only position where the main link 1 and the intermediate link 6 are located in a straight line. If there is no play in the connection point between the three pins 8, the heat damper will be fully open in the heat mode position, but the operating feeling will be heavy, and the main link 1, intermediate link 6, and heat damper link 5 will be located in a straight line. It is unavoidable that an uncomfortable feeling will be caused in the operating feeling when the lever is bent to move to the ventilation mode position or the defroster mode position.

In order to prevent the above-mentioned operation feeling from being heavy and uncomfortable, if some play is placed at the connection point between each link and pin 8, not only will the heat damper not be fully opened in the heat mode position, but it will also become stuck during operation. , the problem arises that a smooth operation feeling cannot be obtained.

Problems to be Solved by the Invention In view of the above-mentioned problems of the prior art, the present invention has been developed so that the operation feeling does not feel strange when converting from heat mode to ventilation mode or defroster mode, and when the heat damper is in the fully open position. The operating range of the link can be varied,
Therefore, it is an object of the present invention to provide a link device for controlling a heater that can reliably guide a heat damper to a fully open position and provide a light and smooth operation feeling.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a mode switch that rotates between three positions: ventilation mode, defroster mode, and heat mode set at an intermediate position between the two modes. By rotating the lever,
In a heater control linkage device in which the heat damper is in a fully closed position in either the ventilation mode or the defroster mode and in the heat mode position, the heat damper is in a fully open position. , a first arm extends in a radial direction toward the support shaft side of the mode switching lever, a second arm extends in a direction symmetrical to the first arm, and a first pin is provided at the tip of the first arm, A second pin is provided at the tip of the second arm, respectively, protruding in a direction parallel to the rotation axis of both arms, and from the mode switching lever,
A link is integrally connected and extends in a substantially symmetrical direction with respect to the support shaft, and the link includes the first
A first notch into which the pin can be introduced, and a second notch into which the second pin can be introduced,
The rotation locus of the first notch due to the rotation of the mode switching lever intersects the rotation locus of the first pin due to the displacement of the heat damper from the fully closed position to the fully open position at two points, and Both the first and second pins and both the first and second notches are placed at a position where the rotation locus of the notch intersects the rotation locus of the second pin due to the displacement of the heat damper at two points. The position of the first notch is set, and the first notch has an entrance part that is located within the rotation locus and opens toward the rear in the rotational direction of the link, and a link that is perpendicular to the notch. When the heat damper is in the fully closed position in the ventilation mode position, the second notch has an entrance portion that is located within the rotation locus and opens toward the front in the rotational direction of the link; When the heat damper is in the defroster mode position and the heat damper is in the fully closed position, it is recessed in the direction perpendicularly moving away from the spindle of the link by a depth equal to the maximum separation interval of the rotation locus between the second notch and the second pin. and a second bent portion holding a second pin of the first notch, and the intersection point of the rotation locus of the first notch and the rotation locus of the first pin is located immediately after the heat damper occupies the fully closed position. position and a position where the damper occupies a fully open position, and the intersection point of the rotation locus of the second notch and the rotation locus of the second pin is
A configuration is adopted in which a position where the heat damper occupies the fully open position and a position immediately after the heat damper occupies the fully closed position are selected.

Function Since the present invention has the above configuration, in FIG. 2, the mode switching lever 9 is placed in the ventilation mode position, and the heat damper 13
When the mode switching lever 9 is rotated to the heat mode position when the mode switching lever 9 is in the fully closed position shown by the solid line, the first notch 23 of the link 20, which is integrally connected to the mode switching lever 9, In the ration mode position, the heat damper 13
the first of the first arms 16 which is integrally coupled with the
Since the pin 18 is held by the first bent portion 26A, the first notch 23 rotates with the first pin 18 as the link 20 rotates, and the heat damper 1
3 is guided to the fully open position, the rotation trajectory X of the first pin 18 and the rotation trajectory W of the first notch 23 intersect, so that the first pin 18 is held by the first bent portion 26A of the first notch 23. The first pin, which had been held in place, is pulled out to the point where both trajectories X and W meet. Thereafter, even if the rotation of the first notch 23, that is, the rotation of the mode switching lever 9, progresses slightly, the first pin 18 maintains the position at the time when the heat damper 13 is at the fully open position.

At this time, the rotation locus Y of the second notch 24 of the link 20 is the same as that of the second pin 19 of the second arm 17.
, and the second pin 19 is smoothly introduced into the second notch 24 from the entrance portion.

When the mode switching lever 9 is rotated from the heat mode position to the defroster mode position, the first pin 18 escapes from the link 20 through the entrance portion 25A of the first notch 23, and the second notch 24 When the heat damper 13 is guided to the fully closed position by deeply engaging the pin 19 and pushing the second pin 19 along the rotation locus Y of the second notch 24, the second pin 19 is pushed into the second notch 24. 24 to the second bent portion 26B,
Rotation of the link 20 is stopped.

When the mode switching lever 9 is rotated from the defroster mode position to the heat mode position, the second bent portion 26B holds the second pin 19 and rotates toward the old position, and the heat damper 13 assumes the fully open position. The second pin 19 is displaced from the second bent portion 26B into the second notch 24 in the rotation trajectory Y, and the first pin 18 is introduced into the first notch 23 from the entrance portion 25A. Ru.

When the mode switching lever 9 is rotated from the heat mode position to the ventilation mode position,
The second pin 19 is connected to the entrance portion 25B of the second notch 24.
The first pin 18 escapes from the link 20 and is pushed by the bottom of the first notch 23 and rotates. When the heat damper 13 is in the fully closed position, the first pin 18
is introduced into the first bent portion 26A of the first notch 23, and the mode switching lever 9 stops rotating.

Embodiment FIG. 1 shows an embodiment of a heater control link device according to the present invention. In this figure, reference numeral 9 indicates a mode switching lever, and an operating lever 10 is connected to the tip of this lever.
is moved along the heater control panel 11. A chain line 10 schematically indicates an operating lever, and a chain line 11 schematically indicates a heater control panel.
On the heater control panel 11, ventilation, heat, and defroster modes are displayed in a straight line in the order of the heat mode, and the operating lever 10 can be moved along this display.

Therefore, the mode switching lever 9 is the operating lever 1.
0, it is possible to rotate in the horizontal direction about the support shaft 12 supported by the vehicle body side fixing member.

Further, reference numeral 13 is a heat damper occupying a fully closed position, and reference numeral 14 is its rotation axis,
It is supported by a fixing member on the vehicle body side, and the shaft 14 and the damper 13 are connected by a connecting member 15. The rotation shaft 14 has a first shaft extending toward the support shaft 12 side.
The arm 16 and a second arm 17 extending in a symmetrical direction with respect to the rotation axis 14 are fixed, and each arm 1
A first pin 18 and a second pin 19 are provided at the tips of 6 and 17 to protrude in a direction parallel to the rotating shaft 14. Therefore, the first arm 16, the second arm 17 and the first
The rotational movement of the pin 18 and the second pin 19 and the rotational movement of the heat damper 13 about the rotational shaft 14 are interlocked.

In FIG. 2, the heat damper 13 is in a fully closed position as shown by a solid line, and is in a fully open position as shown in a broken line 13.

When the heat damper 13 is rotated back and forth between the fully closed position and the fully open position, the first pin 18 protruding from the first arm 16 moves along the rotation trajectory X shown in FIG. The second pin 19, which is protruding from the second arm 17, rotates along a rotation trajectory Z shown in FIG.
Z becomes a circular arc locus symmetrical with respect to the rotation axis 14.

Further, the mode switching lever 9 has its support shaft 1.
2, a link 20 extending in a symmetrical direction is formed, and the link 20 includes a switching lever 9.
In order to rotate the heat damper 13 into two positions, a fully closed position and a fully open position, the first notch 2 engages with the first pin 18, pushes it, and releases it.
3 is formed, and in order to rotate the heat damper 13 between two positions, a fully open position and a fully closed position, by the rotation of the switching lever 9, the second pin 19 is engaged with, pushed and released. Two notches 24 are formed.

The first notch 23 described above is the mode switching lever 9.
In response to the rotation of the first pin 18, it rotates on a rotation locus indicated by the symbol W in FIG. , the rotation locus X is set to intersect at a position immediately after the heat damper 13 occupies the fully closed position and a position where the heat damper 13 occupies the fully open position.

The second notch 24 rotates on a rotation trajectory indicated by the symbol Y in FIG. Z is an arc having its center in the same direction,
The rotation trajectory Z is located between the two intersection points with the rotation trajectory Y, which will be described later, from the rotation trajectory Y to the rotation axis 14.
It is made to protrude in the direction away from.

Rotation trajectory Y and rotation trajectory Z are heat damper 1
3 occupies the fully open position and the heat damper 13
It is set so that it intersects with the position immediately after occupying the fully closed position.

The first notch 23 of the link 20 is connected to the first arm 16 when the heat damper 13 is in the fully closed position.
It has a structure that allows the first pin 18 to be introduced inside,
In addition, a first bent portion 26A that is cut into a substantially semi-elliptical shape from the first notch 23 toward the support shaft 12 to hold the first pin 18 is formed.

The entrance portion 25A of the first notch 23 is connected to the link 20
The first bent portion 26A is opened toward the rear in the rotation direction, and the first pin 18 rotates along the rotation trajectory X with the rotation shaft 14 as the rotation point, as will be described later. Immediately after the heat damper 13 occupies the fully closed position, due to the pressing force in the direction of the support shaft 12 received when the rotation locus W intersects with the rotation locus The cutting depth, that is, the recess depth is set to be equal to the maximum separation distance between the rotation loci W and X.

The rotation angle of the mode switching lever 9 from the ventilation mode position to the heat mode position is such that the first pin 18 of the first arm 16 is moved to the position shown by the solid line in FIGS. 1 and 2, that is, the heat damper 1
From the position when the heat damper 13 is in the fully closed position, push it with the first bending part 26A to rotate it to the position 18' where the heat damper 13 is in the fully open position. Remove it and follow the rotation trajectory W drawn between the first notch 23 and its entrance portion 25A.
The angle is selected so that it can be displaced inward. The above-mentioned displacement of the first pin 18 from inside the first bending part 26A to inside the rotation locus W is a circular arc in a direction in which the rotation locus W and the rotation locus X of the first pin 18 are opposite to each other. This is done by setting one of the positions where the two trajectories W and X intersect as the position where the heat damper 13 is at the fully open position.

When the first pin 18 is rotated to the position 18' and the heat damper 13 is in the fully open position, the second arm 17 and the second pin 19 are connected to each other by the broken line 1 in FIG.
It has been rotated and displaced by an angle α to the positions indicated by 7' and 19'.

The aforementioned link 20 has the aforementioned first pin 18 that rotates together with the aforementioned first pin 18 when it is rotated to the position 18'.
A second notch 24 is formed through which the pin indicated by the broken line 19' is introduced into the interior through the entrance portion 25B.

The entrance portion 25B of the second notch 24 is open toward the front in the rotational direction of the link 20, and the entrance portion 25B and the second notch 24 rotate about the pivot 12. The positions of the entrance portion 25B and the second notch 24 are selected so that the trajectory Y includes the pin 19' indicated by the broken line.

Further, the second notch 24 is recessed with a second bent portion 26B that can hold the second pin 19 in the radial direction away from the rotation shaft 14.

When the mode switching lever 9 is rotated from the heat mode position to the defroster mode position, the link 20 is also rotated in the same direction, and the second notch 2
4 pushes the second pin 19 shown by the broken line at the bottom 24', and rotates the second arm 17 in the direction of the position shown by the solid line in FIG.

The above-mentioned second notch 24 is formed when the link 20 rotates and the second arm 17 and the second pin 19 are connected to the first
When the heat damper 13 is brought to the fully closed position, which is the position shown by the solid line in FIG.
The second pin 19 is inserted from the second notch 24 into the second bent portion 2.
6B, and at this point the heat damper 13
is again brought to the fully closed position.

As described above, the displacement of the second pin 19 from the second notch 24 to the second bent portion 26B within the rotation trajectory Y is the same as the rotation trajectory Y and the rotation trajectory Z of the second pin 19. and are at the position immediately before they intersect when the heat damper 13 assumes the fully closed position, and
During this time, the rotation locus Z is set to be located outside the rotation locus Y with respect to the rotation axis 14, so that the rotation is performed smoothly.

Note that the depth of the cut, that is, the depth of the recess of the second bent portion 26B is equal to the maximum distance between the rotation loci Y and Z, so that the aforementioned rotation of the link 20 is performed smoothly. It can be done.

When the mode switching lever 9 is rotated from the defroster mode position to the heat mode position, the second bent portion 26B of the second notch 24 of the link 20
Pushes the second pin 19 shown by the solid line in FIG. 2 at its inner peripheral edge, rotates the second arm 17, and rotates the heat damper 13 to the fully open position shown by the broken line in FIG. , when the damper 13 is in the fully open position, the second pin 19 moves from the second bent portion 26B into the second notch 24, that is, into the rotation trajectory Y, as shown by the broken line 19' in FIG. Displaced. As mentioned above, this displacement is set so that the rotation locus Y and the rotation locus Z of the pin 19 intersect at the time when the heat damper 13 occupies the fully open position, and the rotation locus Z is set to intersect with the rotation locus Z of the pin 19. Therefore, since the area after this intersection is set to be closer to the rotation axis 14 side, the rotation can be carried out smoothly.

At this time, the first pin 18 of the first arm 16 is
As already mentioned, as indicated by the broken line 18' in FIG.
It is located within the first notch 23 and within the rotation locus W.

Effects The present invention has the configuration and operation described above, and the heat damper can be moved to the fully closed position and the fully open position by the first and second notches of the link that is connected integrally with the mode switching lever and rotates. When the heat damper reaches the fully open position, the link stops rotating on the condition that the pin integrally connected to the damper and engaged with the notch stops. , the operating range of the mode switching lever and the link that rotates together with the mode switching lever can be varied, and the heat damper can always be guided to the fully open position.

Furthermore, since the heat damper is guided to the fully closed position and the fully open position by a series of rotations in the forward and reverse directions of the link integrated with the mode switching lever, there is also the effect that no discomfort is caused in the operation feeling.

Furthermore, the rotation locus of the first and second notches and the first and second positions of the arm coupled to the heat damper are
The notch and the first and second bent portions provided in the notch are engaged and disengaged from the first and second pins by utilizing the intersection with the rotation locus of the pin, making the operation easy. It also has a smoothing effect.

In particular, the recess depth of the first and second bent portions is different from the rotation locus of the first and second notches.
Since the depth is selected to be equal to the maximum distance between the intersecting portions of the pin and the rotation locus of the pin, phenomena such as an increase in resistance or catching will not occur when the bent portion and the pin are engaged and disengaged. This has the effect of making operations smoother.

[Brief explanation of drawings]

FIG. 1 is a plan view of an example of the embodiment, FIG. 2 is an explanatory diagram of the operation shown in FIG. 1, and FIG. 3 is a plan view of a conventional device. 9: Mode switching lever, 13: Heat damper,
12: Support shaft, 14: Rotation shaft, 16: First arm,
17: Second arm, 18: First pin, 19: Second
Pin, 20: Link, 23: First notch, 24:
Second notch, 25A, 25B: Entrance part, 26A:
1st bent part, 26B: 2nd bent part, : Ventilation mode position, : Heat mode position,
: defroster mode position, W: rotation trajectory of the first notch, X: rotation trajectory of the first pin, Y: rotation trajectory of the second notch, Z: rotation trajectory of the second pin.

Claims (1)

[Scope of utility model registration request] By rotating the mode switching lever, which rotates between three positions: ventilation mode, defroster mode, and heat mode, which is set at an intermediate position between both modes, the mode position can be changed to either ventilation mode or defroster mode. In a link device for a heater control, in which the heat damper is in a fully closed position and in a heat mode position, the heat damper is in a fully open position, in a radial direction from the rotation shaft to which the heat damper is fixed to the support shaft side of the mode switching lever. The first arm is extended to the first arm.
A second arm extends in a direction symmetrical to the arm, and a second arm extends in a direction symmetrical to the first arm.
A first pin is provided at the tip of the arm, and a second pin is provided at the tip of the second arm, respectively, protruding in a direction parallel to the rotating shafts of both arms. a link is integrally connected and extended in a substantially symmetrical direction, and the link has a first notch through which the first pin can be introduced;
A second notch is formed into which the second pin can be introduced, and the first notch is formed by rotating the mode switching lever.
The rotation locus of the notch intersects the rotation locus of the first pin as the heat damper moves from the fully closed position to the fully open position at two points, and the rotation locus of the second notch also intersects the rotation locus of the first pin as the heat damper moves from the fully closed position to the fully open position. A first and second
The positions of both the pins and the first and second notches are set, and the first notch is located within the rotation locus and opens toward the rear in the rotation direction of the link. The inlet portion is recessed perpendicularly to the notch in the direction of the support axis of the link by a depth equal to the maximum separation interval of the rotation trajectory between the first notch and the first pin, and the heat damper is recessed in the ventilation mode position. a first bent portion that holds the first pin when the link is in a fully closed position; The defroster is recessed in the direction perpendicular to the notch and away from the spindle of the link by a depth equal to the maximum separation interval of the rotation trajectory between the second notch and the second pin. The second pin that holds the second pin when the heat damper is in the fully closed position in the mode position.
The intersection point of the rotation locus of the first notch and the rotation locus of the first pin is a position immediately after the heat damper occupies a fully closed position and a position immediately after the damper occupies a fully open position. The intersection point of the rotation locus of the second notch and the rotation locus of the second pin is the position where the heat damper occupies the fully open position and the position immediately after the heat damper occupies the fully closed position. Link device for heater control selected for.