JP3161662B2 - Mounting structure of operation knob - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it easy to assemble and pull out an operating knob mounted on the tip of a control lever mounted for operating a heater control or the like of an automobile, thereby enabling reuse. The present invention relates to an operation knob mounting structure.

[0002]

2. Description of the Related Art An instrument panel as an instrument panel is provided in a driver's seat of a car. A ventilator is provided at the center and both sides of the instrument panel, a warm air outlet is provided at the feet of front passengers, and a front panel is provided. Defrosters are arranged on the left and right along the window glass so that proper ventilation and heating are always performed.

[0003] A heater control panel for performing such air conditioning is disposed at a lower portion of a central portion of an instrument panel. As shown in FIG. 7, the heater control panel has an air outlet switching lever A, an inside / outside air switching lever B,
A temperature control lever C, a fan switch D and the like are provided.

A control lever 100 (to be described later) such as an air outlet switching lever A, an inside / outside air switching lever B, a temperature control lever C, etc.
Are slidably arranged in the left-right direction, and
At the tip of the control lever 100, a knob 102 for facilitating grasping during operation is attached.

FIGS. 8 to 10 show a mounting structure of an operation knob conventionally mounted on the tip of a control lever of this type. At the tip of the control lever 100 formed in a thin plate shape, a square concave portion 103 is formed on the plate surface. On the other hand, an insertion hole 104 is formed in an end surface of the knob 102 fitted and mounted on the control lever 100. This insertion hole 104
Is formed with a semicircular protrusion 105 that engages with the concave portion 103.

The knob 102 is connected to the control lever 10
In order to fit the control lever 100, the insertion hole 104 of the knob 102 is fitted to the tip of the control lever 100. Then, the protrusion 105 in the insertion hole 104 is
And is fixed by being engaged with the concave portion 103 of FIG.

[0007]

However, according to the above prior art, when the knob 102 is assembled, the control lever 100 does not escape when the knob 102 is assembled. When assembling the knob 102, the knob 102
Of the control lever 100
As the knob 102 was repeatedly attached and detached, the control lever 100 was hooked on the projection 105, and the projection 105 was crushed or detached. For this reason, if the insertion hole 104 is enlarged, the knob 102 may rattle and come off.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and makes it easy to assemble and pull out an operation knob attached to the tip of a control lever attached for operation of heater control or the like of an automobile, thereby enabling reuse. It is an object of the present invention to provide an operation knob mounting structure.

[0009]

According to the present invention, in order to solve the above-mentioned problems, a concave portion is formed in a plate surface of a tip portion of a control lever, and an insertion hole to be fitted to the tip portion of the control lever is formed in an end surface of a knob. In addition, in the mounting structure of the operation knob, in which a projection engaging with the concave portion is formed on the inner surface of the insertion hole, a guide portion is formed by enlarging an entrance portion of a wall surface of the insertion hole opposite to the projection. I did it.

[0010]

When the knob is fitted to the tip of the control lever, the knob is fitted obliquely so that the tip of the control lever is positioned at the enlarged portion of the insertion hole. In this manner, the tip of the control lever is inserted into the insertion hole of the knob so as not to hit the projection of the knob. In this way, the control lever is fitted into the recess without contacting the protrusion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. 1 is a perspective view showing a mounting structure of an operation knob, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG.
FIG. 4 is a cross-sectional view taken along a line CC of FIG.
FIG. 2 is a sectional view taken along line DD of FIG. 1.

In FIGS. 1 to 5, reference numeral 1 denotes a control lever such as an air outlet switching lever, an inside / outside air switching lever, and a temperature control lever provided on a heater control panel. 2 is a tip 1a of the control lever 1.
This is an operation knob attached to the device.

The control lever 1 has a distal end portion 1a formed in a thin plate shape, and a concave portion 3 which is engaged with an engaging projection (described later) of the operation knob 2 is formed on the plate surface. The recess 3 uses a hole or a dent. The control lever 1 is formed of, for example, a synthetic resin plate or a thin metal plate, and has a width on the distal end side gradually reduced.

The operation knob 2 has an insertion hole 4 formed at an end face thereof so as to be fitted to the distal end portion 1a of the control lever 1. The bottom surface of the insertion hole 4 is engaged with the recess 3 of the control lever 1. A bottomed quadrangular pyramid-shaped engaging projection 5 is provided. The engagement protrusion 5 has at least front and rear wall surfaces formed in a tapered shape 5a.

The insertion hole 4 is formed by enlarging the entrance portion 4a of the wall surface (ceiling surface) opposite to the bottom surface on which the engaging projection 5 is provided, and extending from the middle b of the entrance portion 4a.
The guide portion 6 is formed by forming an inclined surface 7 which gradually decreases toward the intermediate portion c. The thickness m from the slope 7 to the depth d is equal to or slightly wider than the thickness n of the control lever 1 (m ≧ n). The entrance portion of the insertion hole 4 is set so that, for example, the width obtained by subtracting the height dimension h of the engaging projection 5 from the height dimension p is equal to m.

The dimensions of the insertion hole are set, for example, as follows. Assuming that the entrance width of the insertion hole 4 is X and the internal width is Y, X> Y is set. L2 from the entrance a to the middle b of the insertion hole 4 and L2 from the b to the middle part c.
Assuming that L3 extends from c to depth d, L1 ≦ L2 ≦ L3 is set. Note that these dimensional ratios can be appropriately changed and adopted in some cases. L1 is set to such an extent that the control lever 1 does not come off from the engagement projection 5. L2 is an angle at which the control lever 1 can be smoothly inserted. L
3 is set to a length that can support the control lever 1. In this case, it is possible to arbitrarily select the positional relationship between the engaging projection 5 and the recess 3 of the control lever 1.

The insertion hole 4 is formed so that the shape of the guide portion 6 between a and c corresponds to the shape of the distal end portion 1a of the control lever 1. That is, leaving both sides of the guide portion 6 which is a part of the ceiling surface of the conventional insertion hole,
A step 8 is formed along both upper corners between the opening end of the insertion hole 4 and c. The width between the steps 8 was formed in the shape of the tip of the control lever. Thus, when the control lever 1 is inserted into the insertion hole 4, the dimensions of the control lever 1 and the insertion hole 4 are set so that both sides are held by the step 8.

Next, a description will be given of a mounting structure of the operation knob having the above configuration. The operation knob 2 is fitted to the distal end portion 1a of the control lever 1 through the insertion hole 4. At this time, the control lever 1 is inserted along the upper side of the insertion hole 4 of the operation knob 2 as shown in FIG. As a result, the control lever 1 can be inserted deeper into the engagement protrusion 5 without hitting the engagement protrusion 5 of the insertion hole 4. Next, as shown in FIG. 6B, the operation knob 2 is pushed by contacting the slope 7 of the guide portion 6 of the insertion hole 4 with the tip of the control lever 1. Then, as shown in FIG. 6C, when the operating knob 2 is pushed in, the concave portion 3 of the control lever 1 is engaged with the engaging projection 5 of the insertion hole 4, and the removal is prevented. At this time, both ends of the control lever 1 are locked and fixed to the step 8 of the insertion hole 4.

Even if both sides of the control lever 1 hit the step 8 before the control lever 1 is completely inserted into the insertion hole 4, the control lever 1 is freely bent and absorbed depending on the material and thickness of the control lever 1. be able to.

According to the above-described embodiment, the guide portion 6 is formed by enlarging the entrance portion of the wall surface opposite to the engagement projection portion 5 of the insertion hole 4 of the operation knob 2.
When engaging with the control lever 1,
, And there is no possibility that the engaging projection 5 may be crushed. Further, since the front and rear of the engagement protrusion 5 of the insertion hole 4 are formed in a taper 5a, the control lever 1 can smoothly enter the insertion hole 4. When the control lever 1 is inserted into the insertion hole 4, the control lever 1 is sandwiched by the inside of the insertion hole 4, so that the operation knob 2 does not rattle. Further, since the operation knob 2 grips both sides of the control lever 1 by the step 8 of the insertion hole 4,
There is no danger that the operating knob 2 will come off the control lever 1.

[0021]

As described above, according to the mounting structure of the operation knob according to the present invention, the following effects can be obtained. 2. The control lever according to claim 1, wherein a concave portion is formed in a distal end plate surface of the control lever, and an insertion hole to be fitted to the distal end portion of the control lever is formed in an end surface of the knob, and the concave portion is engaged with the concave portion on an inner surface of the insertion hole. In the mounting structure of the operation knob having the projection formed, the guide portion is formed by enlarging the entrance portion of the wall opposite to the projection of the insertion hole, so that the control bar is inserted along the guide portion of the knob. Therefore, the knob can be easily attached and detached. In claim 2, the enlarged portion of the insertion hole is formed at least deeper than the projection, and the height of the entrance of the insertion hole is set to at least the sum of the thickness of the control lever and the height of the projection. Therefore, there is no possibility that the projection will hit the control lever. According to the third aspect, at least the front and rear surfaces of the projection are formed to be tapered, so that the projection can be easily assembled to the control lever. In claim 4, since the guide portion is formed by forming the wall surface of the insertion hole on the side opposite to the protrusion portion on the slope that is gradually lowered, the operation knob may be attached to the tip of the control lever using the slope. it can. In claim 5, the step is formed on both sides of the guide portion of the insertion hole, and the width between the steps is formed in the shape of the tip of the control lever, so that the operating knob is assembled to the control lever. Since the control lever can be gripped and held by the step portion, there is no possibility of rattling.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a mounting structure for an operation knob according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along line CC of FIG. 1;

FIG. 5 is a sectional view taken along line DD of FIG. 1;

FIG. 6A is a cross-sectional view showing the order in which the operation knobs are mounted on the control lever.
(B) is sectional drawing which shows the attachment order of the operation knob of the state in which the control lever enters into an insertion hole avoiding a protrusion part.
(C) is sectional drawing which shows the attachment order of the operation knob of the state attached to the control lever.

FIG. 7 is a conceptual diagram showing a heater control panel.

FIG. 8 is a perspective view showing a conventional operation knob mounting structure.

FIG. 9 is a sectional view taken along line AA of FIG. 8;

FIG. 10 is a sectional view taken along line BB of FIG. 8;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 control lever 2 operation knob 3 recess 4 insertion hole 5 engagement projection 6 guide 7 slope 8 step 1 a tip 4 a entrance part 5 a taper part

Claims (5)

(57) [Claims] 1. A concave portion is formed in a plate surface of a distal end portion of a control lever, an insertion hole to be fitted to the distal end portion of the control lever is formed in an end surface of a knob, and an inner surface of the insertion hole is engaged with the concave portion. A mounting structure for an operation knob, wherein the guide portion is formed by enlarging an entrance portion of a wall surface of the insertion hole opposite to the protrusion portion. 2. An enlarged portion of the insertion hole is formed at least deeper than the projection, and an entrance height of the insertion hole is set to at least a sum of a thickness of the control lever and a height of the projection. The mounting structure for an operation knob according to claim 1, wherein: 3. The mounting structure for an operation knob according to claim 1, wherein at least the front and rear surfaces of the projection are tapered. 4. The operation knob according to claim 1, wherein the guide portion is formed by forming a wall surface of the insertion hole on the side opposite to the protrusion portion on a slope that is gradually lowered. Mounting structure. 5. A control lever according to claim 1, wherein step portions are formed on both sides of the guide portion of the insertion hole, and a width between the step portions is formed in a shape of a tip end portion of the control lever.
The mounting structure of the operation knob according to any one of the above.