JP3691127B2 - switch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a highly waterproof and dustproof switch suitable for electrical components of automobiles.
[0002]
[Prior art]
A case with a built-in contact, a pivot shaft that protrudes upward from the inside of the case through the top surface of the case, an umbrella-shaped knob attached to the protruding end of the case, and a coupler that is integrally projected to the side of the case A switch with the above is well known.
[0003]
[Problems to be solved by the invention]
By the way, in the case of the above-described conventional structure, when water is applied to the switch, water may enter the gap between the knob and the case or the coupler, and it is desired to improve waterproofness. The same applies to dust, and it is desirable to improve dust resistance.
[0004]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a case having a built-in contact, a rotating shaft that protrudes upward from the inside of the case through the upper surface of the case, an umbrella-shaped knob attached to the protruding end, and a side surface of the case. In a switch having a coupler formed to project integrally,
A concentric large and small circular wall is formed on the upper surface of the case that is covered by the knob, and the outer ring wall is surrounded by the inner ring wall and the outer ring wall is formed on the outer periphery of the knob. It is overlapped with the inside of the peripheral wall that is substantially parallel to the rotating shaft, and an outward flange is provided around the opening of the coupler, and a lock opening is formed on the wall surface of the coupler that is downward when the switch is mounted. A peripheral wall surrounding the opening is formed so as to protrude downward.
[0005]
The invention of claim 2 includes a case with a built-in contact, a turning shaft that protrudes upward from the inside of the case through the upper surface of the case, an umbrella-shaped knob attached to the protruding end, and a side surface of the case. In a switch having a coupler formed to project integrally,
A concentric large and small circular wall is formed on the upper surface of the case that is covered by the knob, and the outer ring wall is surrounded by the inner ring wall and the outer ring wall is formed on the outer periphery of the knob. An opening that communicates with the inside of the case is provided at the portion sandwiched between the large and small annular walls on the upper surface of the case, and the peripheral wall surrounding the opening is directed upward. Protrusively formed.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment configured as a switch used for electrical components of an automobile will be described based on the drawings.
[0007]
3 is a perspective view of the switch, FIG. 4 is an external view showing the coupler side (a direction indicated by an arrow A in FIG. 1), FIG. 5 is a bottom view (a direction indicated by an arrow B in FIG. 2), and FIG. FIG. 6 is a sectional view taken along line 6-6, and FIG. 7 is a view showing the upper surface of the case.
[0008]
First, as shown in FIGS. 3 and 4, the switch includes a substantially rectangular parallelepiped case 1 and an umbrella-shaped knob 3 that is rotatably mounted on an upper surface 2 of the case 1.
[0009]
A mounting portion 4 protrudes on both sides of the case 1 in the longitudinal direction, and a notch recess 5 is formed above the base portion of the mounting portion 4 at the edge portion of the upper surface 2 of the case 1 in the longitudinal direction (FIG. 3).
[0010]
This switch is attached to an appropriate place on the vehicle body side (not shown) by the mounting portion 4 in the state of FIGS.
[0011]
A lens 6 is attached to the end of the upper surface 2 opposite to the concave portion 5 so as to allow illumination light from inside the case 1 to pass therethrough. A lens 7 is also provided on the shoulder of the knob 3.
[0012]
As apparent from FIGS. 4 and 5, a coupler 8 is formed so as to protrude laterally on one of the side surfaces 90 ° different from the side on which the mounting portion 4 of the case 1 is formed.
[0013]
An outward flange 9 is formed around the opening of the coupler 8, and a lock opening 11 is formed on the lower wall surface when the switch is mounted.
[0014]
A peripheral wall 12 protruding downward is formed around the lock opening 11, and a part of the peripheral wall 12 is an outward flange 9.
[0015]
As shown in FIG. 5, the lock opening 11 is provided for fitting and locking a lock claw portion (not shown) of the coupler 13 when coupled to another coupler 13.
[0016]
As shown in FIG. 1, the space 14 of the coupler 8 communicates with the lock opening 11, and the coupler terminal 15 protrudes into the space 14 from the case 1 side.
[0017]
The other end of the conductor plate 16 whose one end becomes the coupler terminal 15 extends into the case 1 and is exposed as a fixed contact 17, and a movable contact 18 is pressed against this by a contact spring 19.
[0018]
The conductor plate 16 is integrated with the bottom portion 20 of the case 1 that is fitted below the case 1, and the bottom portion 20 is continuously integrated with the coupler 8.
[0019]
A rotation center protrusion 21 is integrally formed at the center of the bottom 20 so as to protrude upward, and the protruding end of the rotation center protrusion 21 is fitted into a center hole 23 provided on the rotation shaft of the contact holder 22. are doing.
[0020]
The contact holder 22 is integrally provided with arm portions 24 and 25 extending in the left-right direction from the central portion. One arm portion 24 supports the movable contact 18 and the contact spring 19, and the other arm portion 25 has a click. A spring 26 and a click ball 27 are accommodated.
[0021]
The click ball 27 is pressed against the click groove 28 formed integrally with the bottom 20 side by the click spring 26, and the contact holder 22 is moderately rotated.
[0022]
A rotation shaft 29 extends upward and is integrally formed at the center of the upper surface side of the contact holder 22, and a notch 30 is formed in a part of the upper outer peripheral surface thereof.
[0023]
The rotating shaft 29 is attached to a central portion 31 of the knob 3 so as to rotate downward and integrally protrude so that the knob 3 and the contact holder 22 rotate integrally.
[0024]
As shown in FIG. 6, a leaf spring 32 having a cross section similar to the cross section of the portion including the cutout portion 30 of the rotating shaft 29 is fitted in the cylindrical portion 31, and a part of the circumferential direction of the leaf spring 32 is A slot 33 is provided.
[0025]
For this reason, the cylindrical portion 31 is prevented from coming off from the rotating shaft 29 by the elasticity of the leaf spring 32, and is prevented from rotating by the step portion 34 of the leaf spring 32 coming into contact with the notch portion 30.
[0026]
As shown also in FIG. 7, concentric large and small circular walls 35, 36 are integrally formed on the upper surface 2 of the case 1 so as to protrude upward, and the inner circular wall 35 is formed on the outer periphery of the rotating shaft 29. Along the surface, the outer annular wall 36 enters the inside of a peripheral wall portion 37 formed substantially parallel to the rotation shaft 29 at the outer peripheral portion of the knob 3.
[0027]
Further, as apparent from FIGS. 2 and 7, a standing wall 39 surrounding the small space 38 opened upward is integrally formed inside the annular wall 36 near the recess 5.
[0028]
Further, a standing wall 40 that connects the annular wall 35 and 36 is formed on the opposite side of the standing wall 39 across the annular wall 35, and a prism 42 is provided below a hole 41 surrounded by these walls (FIG. 2).
[0029]
However, the standing wall 40 can also be formed as a peripheral wall portion that is separated from the annular wall 35 and 36 and surrounds the hole 41 alone.
[0030]
The space below the lens 6 accommodates the light emitting portion of the bulb 43 attached to the bottom 20, and the light goes out through the lens 6, passes through the hole 41 from the prism 42, passes through the lens 7 of the knob 3. But it is going to go outside.
[0031]
Next, the operation of this example will be described. In FIGS. 1 and 2, when the switch is attached at an appropriate position on the vehicle body side in the direction shown in the drawing, the lock opening 11 is positioned below the coupler 8.
[0032]
Therefore, when water is applied to the switch, most of the water drops directly through the knob 3 and the surface of the case 1. At this time, a part falls from the knob 3 to the recess 5 as shown in FIG.
[0033]
Further, most of the water passing through the surface of the case 1 toward the coupler 8 is blocked by the outward flange 9 formed in the opening. Even if the water enters the space 14 of the coupler 8, the lock opening 11 Is quickly discharged downward.
[0034]
In addition, since the peripheral wall 12 surrounding the lock opening 11 extends downward, there is very little possibility of water entering the space 14 from below the coupler 8 through the lock opening 11.
[0035]
Even if a small amount of water enters between the knob 3 and the upper surface 2, the peripheral wall portion 37 and the annular wall 36 form a kind of labyrinth structure, and a small space 38 and a standing wall 39 are formed inside the annular wall 36. Most of the intrusions can be stopped here.
[0036]
Even if a small amount of water travels further to the center, the annular wall 35 surrounds the rotation shaft 29, so that it is blocked by the annular wall 35 and moves over the annular wall 35 and rotates with the annular wall 35. There is almost no possibility of entering the case 1 from between the shafts 29.
[0037]
In addition, since the periphery of the hole 41 formed above the prism 42 is surrounded by the standing wall 40 and the annular walls 35 and 36, there is almost no possibility of water entering the case 1 from the hole 41.
[0038]
Therefore, waterproofness can be remarkably improved. In addition, the dustproof property is enhanced similarly to the waterproof property.
[0039]
【The invention's effect】
According to the first aspect of the present invention, an annular wall surrounding the outer periphery of the rotating shaft of the knob is provided on the upper surface of the case, and a large-diameter annular wall is provided concentrically with the annular wall so that the outer peripheral portion of the knob is provided. A labyrinth structure was formed by overlapping inside the formed peripheral wall.
[0040]
Therefore, even if water is applied to the switch, it is possible to prevent water from entering the case from between the knob and the case. In addition, the dust resistance can be increased as well.
[0041]
In addition, a lock opening is provided on the wall surface that is lower when the coupler protruding to the side of the case is installed, and the peripheral wall surrounding the lock opening is formed to protrude downward, so that water that has entered the coupler is also open. It can be discharged from the part and can be extremely waterproof.
[0042]
In addition, since the lock opening is used as the water drain opening of the coupler, it is not necessary to form a special opening and the structure can be simplified.
[0043]
According to the invention of claim 2, in addition to the waterproof structure between the knob and the case, a hole is opened in a portion sandwiched between the inner and outer annular walls on the upper surface of the case, and a standing wall surrounding the periphery of the hole is provided. Water that has entered between the knob and the case can be prevented from entering the case through the hole.
[Brief description of the drawings]
1 is a cross-sectional view taken along line 1-1 in FIG. 3. FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. 3. FIG. 3 is a perspective view of the switch. 5] B arrow direction view in FIG. 2 of FIG. 2 [FIG. 6] Sectional view taken along line 6-6 in FIG.
1: Case, 3: Knob, 5: Recess, 8: Coupler, 11: Locking opening, 12: Perimeter wall, 20: Bottom, 22: Contact holder, 29: Rotating shaft

Claims (2)

A case with a built-in contact, a pivot shaft that protrudes upward from the inside of the case through the top surface of the case, an umbrella-shaped knob attached to the protruding end of the case, and a coupler that is integrally projected to the side of the case In a switch with
A concentric large and small annular wall is formed in the part covered with the knob on the upper surface of the case, and the inner annular wall surrounds the outer peripheral surface of the rotating shaft.
While overlapping the outer annular wall on the inner side of the peripheral wall portion substantially parallel to the rotation shaft formed on the outer peripheral portion of the knob,
Provide an outward flange around the coupler opening,
A lock opening is formed on the wall of the coupler, which is the bottom when the switch is mounted.
A switch characterized in that a peripheral wall surrounding the lock opening is formed to project downward. A case with a built-in contact, a pivot shaft that protrudes upward from the inside of the case through the top surface of the case, an umbrella-shaped knob attached to the protruding end of the case, and a coupler that is integrally projected to the side of the case In a switch with
A concentric large and small annular wall is formed in the part covered with the knob on the upper surface of the case, and the inner annular wall surrounds the outer peripheral surface of the rotating shaft.
While overlapping the outer annular wall on the inner side of the peripheral wall portion substantially parallel to the rotation shaft formed on the outer peripheral portion of the knob,
A switch characterized in that an opening communicating with the inside of the case is provided in a portion sandwiched between large and small annular walls on the upper surface of the case, and a peripheral wall surrounding the opening protrudes upward.

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