JP2589533Y2 - Backlash prevention structure of multi-directional switch device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a multi-switch system in which one switch is provided with a plurality of switch contacts, such as a remote control mirror operating switch for an automobile.
The present invention relates to a multi-directional switch capable of selectively operating at least one of the plurality of sets of switch contacts by a plurality of manual operation members, and relates to a multi-directional switch improved so as to prevent backlash of a manual operation member. It is.

[0002]

2. Description of the Related Art As an example of this type of switch, there is a four-way switch for remotely controlling a door mirror for a vehicle up, down, left and right. The four-way switch generally includes four sets of switch contacts for tilting the door mirror upward, downward, left, and right, and one push plate capable of selectively operating a required set of the four sets of switch contacts. It is provided with one knob-type switch for switching between the operation of the right side mirror and the operation of the left side mirror of the vehicle body. Hereinafter, for convenience of explanation, the plurality of sets of switch contacts will be referred to as unit switches, and one assembled device containing a plurality of unit switches will be referred to as a switch device. FIG. 4 is an exploded perspective view of a four-way switch for operating a door mirror shown as a conventional example of a multi-directional switch. 1 is a cylindrical outer case,
1a is the top surface. Four through holes 1b are provided on the top surface. The unit switch group 2 is housed in the outer case. In this conventional example, four movable contacts are respectively pushed by push rods 3, and the outer case 1 is moved.
A switch function is performed by sliding on the substrate 4 incorporated in the device. The push rods 3 are respectively slidably inserted into the through holes 1b, and the upper ends thereof protrude from the top surface 1a of the outer case 1 to the outside of the case. This switch device is not limited in the mounting posture when used, but for convenience of description, the arrow Z is assumed below on the assumption that three orthogonal axes X, Y, and Z are shown.
The direction (upper side of the paper) is referred to as upward. Push rod 3 protruding upward from top surface 1a of outer case 1
The push plate 5 is arranged in contact with the upper end of the
Triangular marks 5a to 5d indicating up, down, left and right of the mirror tilting direction are provided facing each other in the X-axis direction and the Y-axis direction for convenient operation. An opening 5 e is provided at the center of the push plate 5, and a switch knob 6 is provided through the opening 5 e and the opening 1 c on the top surface of the outer case 1, and a bracket 1 d integrally formed with the outer case 1. , So as to be tiltable about the X axis.
A ball 6a and a spring 6b for urging the ball in a pushing direction (downward) are provided in the switch knob. When the switch knob 6 is tilted, the ball 6a is cut into a notch. 7 rolls along the upper edge to provide moderation to the tilt of the switch knob 6. A slider 8 is engaged with the lower end of the switch knob 6, and the slider 8 is slid on the substrate 4 with the tilt of the switch knob. A movable contact piece of a unit switch group 9 is accommodated in the slider 8 and slides on the substrate 4 together with the slide of the slider 8 to perform a switch function. The left and right operation signals are switched to one of the left and right door mirrors. The reference numeral 10 denotes a holder, and the outer case 1
To hold the substrate 4 and the terminals 11 from below. The engagement protrusion 10a provided on the holder 10 is engaged with the engagement hole 1f of the outer case 1 to perform a function of preventing the engagement. Further, the arm 10b of the holder 10 is provided with a plate-like member (not shown) such as an operation panel for the switch device.
It is a member to be attached to. Outer case 1
A cylindrical wall 1e is formed integrally with the periphery of the top surface 1a so as to face and separate from the periphery of the push plate 5, and a flange 1g is integrally provided at the upper end thereof. Conventional multidirectional switch configured as described above (specifically, four-way switch equipment having a knob switch) is to switching operation unit switches 2 made of four unit switches the push plate 5 And switch knob 6
Since the unit switch group 9 operated by (1) is compactly incorporated, it is suitable for operating a remote control type door mirror for an automobile. In the description of the conventional example (FIG. 4), the arrow Z direction is referred to as “upward” for the sake of convenience, and when the multidirectional switch is put to practical use, the Z direction is not necessarily the earth. Is not necessarily directed upward with respect to Rather, it is often used in such a position that the arrow Z is slightly upward from horizontal.

[0003]

FIG. 5 is a cross-sectional view showing a state where the conventional multi-directional switch shown in FIG. 4 is assembled.
It is -Z sectional drawing. 1b is the through hole shown in FIG. 4, and the push rod 3 is inserted in the Z-axis direction. FIG. 4 shows one through hole 1b in one oval shape because the scale is small, but in detail, as shown in FIG. 5, the push rod 3 can be slidably held in the Z-axis direction. , A cylindrical portion 1j is formed integrally with the outer case 1. The upper end of the push rod 3 is in contact with the push plate 5, and the push plate 5 has a seat 5f (hereinafter abbreviated as contact surface) for receiving the push rod 3 in contact with the Z axis. (Ie, parallel to the XY plane). This part will be described in further detail in an enlarged scale. 6A and 6B show the vicinity of the push plate in the conventional example, FIG. 6A is a front sectional view schematically drawn by cutting along the XZ plane, and FIG.
FIG. 2 is a side sectional view schematically drawn by cutting along a plane. However, only the push plate has been cut. FIGS. 7A and 7B are three views showing the push plate in the conventional example, in which FIG. 7A is a bottom view as viewed in the Z-axis direction, and FIG.
FIG. 3B is a cross-sectional view taken along a line B, and FIG. As shown in these figures, the contact surface (the seat surface that contacts the push rod) 5f of the push plate 5
Is a plane orthogonal to the Z axis. That is, it is a plane perpendicular to the push rod 3. As is clear from FIG. 5, the push plate 5 must be movable in the Z-axis direction (up and down in the figure) in order to push down the push rod 3, but the push plate 5 is moved up and down in parallel. You cannot be restrained and guided. The reason is,
Any one or two of a plurality of push rods 3
Since a function of selectively pressing down a book is required, the push plate 5 is tiltably supported. The above tilt will be described next with reference to FIG. FIG. 5 shows two of the four push rods. To distinguish these two from each other, they are referred to as a push rod 3 and a push rod 3 'as shown. Now, both push rods 3, 3 'are not pressed down by the push plate 5, and the push plate 5 is in the horizontal posture HH. In this state, if only the push rod 3 is to be lowered without lowering the push rod 3 ', an eccentric load is applied as shown by the arrow p and the push plate 5 must be inclined as shown by the imaginary line II. No. As described above, the push plate 5
The push plate 5
Causes backlash in the XY plane. The present invention has been made in view of the above-described circumstances, and has a function of a multi-directional switch having a push plate (a large number of push-moving points of a push plate as one operating member are selected. It is an object of the present invention to provide a structure capable of preventing backlash of the push plate without obstructing one or two sets of the unit switches.

[0004]

In order to achieve the above object (playback prevention), the multidirectional switch device according to the present invention has a backlash prevention structure including a crested case and a plurality of cases housed in the case. Unit switches, and slidably fit into holes provided on the top surface of the case and apply an operating force to each of the plurality of unit switches from the outside of the case top surface. A multi-directional switch, comprising: a plurality of push rods for transmitting power; and a push plate disposed on the outside of the top surface of the case so as to be opposed to and separated from the top surface and abutting against the tips of the plurality of push rods. In the above, assuming three orthogonal axes X, Y, and Z with a longitudinal direction of the plurality of push rods being a Z axis, a seating surface provided on the push plate and in contact with an end surface of the push rod is represented by “X − On the Y surface And line surface consists of a combination of a plane not parallel onto the X-Y plane, toward the distal end of the push rod
And a concave shape .

[0005]

[Action] With the above arrangement, the seating face the end surface of the push rod is in contact with the push plate, it is surface is not parallel to the X-Y plane parallel to the plane and X-Y plane is formed, the total
Physically, it is concave toward the tip of the push rod . Since the plane parallel to the XY plane is orthogonal to the Z axis and perpendicular to the push rod, the pressing force of the push rod is securely supported and transmitted . Then, a plane that is not parallel to the XY plane obliquely intersects the Z axis, and when receiving the pressing force of the push rod, the principle of the slope acts to generate a component force in the X axis direction or the Y axis direction. That is, the push rod receives not only a longitudinal compressive force but also a bending force.
Therefore, the push plate receives the reaction force of the bending force. Since a plurality of push rods are provided, component forces acting on each of the plurality of push rods in the X-axis direction and the Y-axis direction are mutually balanced so that play of the push plate is eliminated. Works. For this reason, according to the present invention, the shape of the seating surface for the push rod to be provided on the push plate is improved so that the plane parallel to the XY plane (the plane perpendicular to the Z axis) and the XY plane are inclined. A cross-section (a plane not orthogonal to the Z axis) is formed in a concave shape by combining
With such a simple structure, the play of the push plate can be prevented.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. 1A and 1B are two views showing one embodiment of a play preventing structure of a multidirectional switch according to the present invention, in which FIG. 1A schematically illustrates a partial cross section along the XZ plane, and FIG. Is a schematic drawing of a partial cross section taken along the YZ plane. This embodiment is an improvement obtained by applying the present invention to the conventional example shown in FIGS. 4 to 7, and this figure corresponds to FIG. 6 in the conventional example. Components designated by the same reference numerals in FIG. 6 are the same as or similar to those in the conventional example. Reference numeral 21 denotes a push plate formed by applying the present invention, and reference numeral 21f denotes a seat surface (contact surface) that contacts the push rod 3. The contact surface 5f of the push plate 5 of the conventional example (FIG. 6) is perpendicular to the Z axis (X-Y).
The contact surface 2 of the present example as compared with the plane parallel to the axis).
1f is a combination of a plane parallel to the XY axis and a plane not parallel to the XY axis. 2A and 2B are three views of the push plate in the above embodiment, wherein FIG. 2A is a bottom view as viewed in the Z-axis direction, FIG. 2B is a sectional view taken along the line bb of FIG. 2, and FIG. FIG. Plane 21 parallel to XY plane
and f _1, X-Y is not parallel to the surface plane 21f _2, 21f ₃ and is combined with the abutment surface 21f is formed. FIG. 3 is an exploded perspective view illustrating the contact surface and the push rod in the above embodiment in comparison. Surface 21f ₁ of the three surfaces constituting the abutment surface 21f is parallel to the X-Y plane (Z axis perpendicular)
It is. Surface 21f ₂ of the above three planes are not parallel to the X-Y plane, the intersection line of the surface 21f ₁ of the is parallel to the X axis.
The surface 21f ₃ of said three surfaces are not parallel to the X-Y plane, the intersection line of the surface 21f ₁ of the is parallel to the Y axis. 3 'indicated by a virtual line indicates that the push rod 3 has the contact surface 21f.
Represents the tip on the contact side when the contact is made. Contact surface at this time is out Hami (0.05 mm in this example) slightly from X-Y plane parallel to the plane 21f _1,
The faces 21f ₂ and 21f ₃ which are not parallel to the XY plane are touched. Thus, the tip of the push rod 3 receives a component force in the directions of arrows Y and X according to the principle of the slope. In addition, the push plate having the contact surface 21f receives the force in the direction opposite to the arrow Y and the direction opposite to the arrow X as the reaction force, and the play is eliminated. The reaction force push plate receives, indicated by arrows _{F 1, F 2, F 3} , F 4 in FIG. These forces are balanced, and the play of the push plate 21 is prevented.

[0007]

Applying the present invention, according to the invention], the seating face the end surface of the push rod is in contact with the push plate, the surface is not parallel to the X-Y plane parallel to the plane and X-Y plane is formed, the total
Physically, it is concave toward the push rod. X-Y plane parallel to the plane is perpendicular to the Z-axis, because a push rod and a plane perpendicular, to reliably support the pressing force of the push rod
The pressing force is transmitted . Then, a plane that is not parallel to the XY plane obliquely intersects the Z axis, and when receiving the pressing force of the push rod, the principle of the slope acts to generate a component force in the X axis direction or the Y axis direction. That is, the push rod receives not only a longitudinal compressive force but also a bending force. Therefore, the push plate receives the reaction force of the bending force. Since a plurality of push rods are provided, component forces acting on each of the plurality of push rods in the X-axis direction and the Y-axis direction are mutually balanced so that play of the push plate is eliminated. Works. For this reason, according to the present invention, the shape of the seating surface for the push rod to be provided on the push plate is improved so that the surface is parallel to the XY plane (the plane orthogonal to the Z axis).
And a surface oblique to the XY plane (a surface that is not orthogonal to the Z axis) in combination to form a concave
With a simple structure which would have to form a, it exhibits an excellent practical effect that it is possible to prevent rattling of the push plate.

[Brief description of the drawings]

FIG. 1 is a two-sided view showing one embodiment of a backlash preventing structure of a multidirectional switch according to the present invention, in which (A) schematically illustrates a partial cross section along the XZ plane, and (B). Is a schematic drawing of a partial cross section taken along the YZ plane.

FIGS. 2A and 2B are three views of the push plate according to the embodiment, wherein FIG. 2A is a bottom view as viewed in the Z-axis direction, FIG. FIG.

FIG. 3 is an exploded perspective view illustrating a contact surface and a push rod in the above embodiment in comparison.

FIG. 4 is an exploded perspective view showing a conventional example of a four-way switch.

5 is an XZ sectional view in a state where the multidirectional switch according to the conventional example shown in FIG. 4 is assembled.

6A and 6B are front cross-sectional views schematically showing the vicinity of the push plate in the conventional example, and FIG. 6A is a schematic cross-sectional view taken along the XZ plane, and FIG. 6B is a schematic sectional view taken along the YZ plane. It is the side sectional view drawn.

FIG. 7 shows a push plate 3 in the above conventional example.
It is a top view, (A) is a bottom view seen in the Z-axis direction, (B)
Is a sectional view taken along the line BB, and FIG. 3C is a sectional view taken along the line CC.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outer case, 1a ... Top surface, 1b ... Through-hole, 1c ... Opening, 1d ... Bracket, 1e ... Cylindrical wall, 1f ... Engagement hole, 1g ... Flange, 1h ... Hollow pyramid-shaped bracket,
1j: cylindrical portion, 2: unit switch group, 3: push rod, 4: substrate, 5: push plate, 5a to 5d: mark, 5e: opening, 6: switch knob, 6a: ball,
6b: spring, 7: moderator, 8: slider, 9: unit switch group, 10: holder, 10a: engagement projection, 10
b: arm, 11: terminal, 21: push plate, 2
1f: contact surface, 21f ₁ : surface parallel to the XY plane, 21
f ₂ , 21f ₃ ... planes not parallel to the XY plane.

Claims (1)

(57) [Scope of request for utility model registration] 1. A case having a top, a plurality of unit switches housed in the case, and a hole provided on a top surface of the case slidably fitted to an outer side of the case top surface. And a plurality of push rods for transmitting an operating force to each of the plurality of unit switches among the plurality of unit switches, and the plurality of push rods which are disposed facing and apart from each other outside the top surface of the case. A push plate abutting on a tip of the push rod, wherein the push plate is formed by assuming three orthogonal axes X, Y, and Z with a longitudinal direction of the plurality of push rods as a Z axis. The seating surface which is provided at the end and abuts against the end surface of the push rod,
It consists of a combination of a plane parallel to the XY plane and a plane not parallel to the XY plane, and is concave with respect to the tip of the push rod.
A play preventing structure for a multi-directional switch device, characterized in that the structure is formed into a shape .