JP3522988B2 - Seesaw push switch device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seesaw-type push switch device in a switch device used for electric appliances such as televisions and videos.

[0002]

2. Description of the Related Art As a conventional technique, the actual kaihei 2-11102 is used.
There is a seesaw switch device described in Japanese Patent No. The seesaw switch device shown in FIG. 1 of this publication has a seesaw knob (18; reference numerals in this publication are used from the top to the bottom in FIG. 1; the same applies hereinafter), operating parts (19, 20), The intermediate member (16, 17), the printed board (11), and the switch (12, 13).

The seesaw knob (18) is rotatably supported by a case on a rotation axis X, and operating portions (19, 20) are provided on both sides of a lower end surface thereof. And
Intermediate members (19, 20) are arranged at positions facing the operation portions (19, 20), respectively. And
The switches (12, 13) electrically connected to the printed circuit board 11 are disposed below the intermediate members (16, 17), respectively.

The intermediate member (16, 17) is the first
When the seesaw knob (18) is pushed downward by the operator from above in the drawing, the contact point between the intermediate member (16, 17) and the switch (12, 13) is prevented from shifting in the left-right direction. . The seesaw switch device shown in FIG. 2 of this publication has an intermediate member (1
The operation unit (6, 7) directly presses the switch (3, 4) without going through 6, 17).

[0005]

However, among the above-mentioned conventional techniques, in the seesaw type switch shown in FIG. 1, the intermediate member (16, 17) and the switch (12, 13) are used.
It is possible to keep the contact point with
There is a problem that the number of parts is large and the assembly process becomes complicated.

In the seesaw-type switch shown in FIG. 2, the number of parts is small, but the contact points between the operating parts (6, 7) and the switches (3, 4) are shifted in the left-right direction. In view of the above problems, it is an object of the present invention to provide a seesaw-type push switch device in which the number of parts is reduced and the contact point with the switch does not shift.

[0007]

According to the present invention, in the invention as set forth in claims 1 to 3, two switch elements mounted side by side on the substrate and between the two switch elements and in an area above the substrate are provided. It rotates by being supported by a first fulcrum provided, and the first fulcrum has one of the switch element side and the other of the switch element sides with respect to the first fulcrum.
The first operating portion abutting one of the switch elements and a second fulcrum arranged between the switch elements and in a region higher than the first fulcrum are supported to rotate, and
Of the first fulcrum and the first fulcrum on the one side of the switch element side and the other side of the switch element side.
And a second operation part that comes into contact with the second operation part, and when any one side of the second operation part is pushed downward around the second fulcrum, the first operation part is pressed downward. It is characterized in that the switch element located therebelow is pushed through the first operation section.

With this configuration, when one of the sides of the second operating portion is pushed downward around the second fulcrum, the switch located below the first operating portion is pressed through the first operating portion. Since the element is pushed, the two switch elements can be pushed by the first operating portion and the second operating portion, and the number of parts can be reduced. In addition, the first operation unit and the second operation unit have different first fulcrums,
Since the first operation portion and the second operation portion are supported and rotated by the second fulcrum, the rotation loci of the first operation portion and the second operation portion are different, and it is possible to reduce the amount of displacement of the switch element.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the drawings. FIG. 2 shows a panel 10 equipped with a seesaw-type switch device according to the first embodiment of the present invention.
The panel 10 is used in a vehicle air conditioner, and is normally arranged in the front of the vehicle compartment. The panel 10 is an air conditioner operation plate that is operated by an occupant to obtain an air conditioning state desired by the occupant.

In the refrigeration cycle (not shown) of the vehicle air conditioner according to this embodiment, the rotational driving force of the internal combustion engine of the vehicle, that is, the engine, is transmitted to the rotary shaft via the power interrupter (for example, a magnet clutch). , A refrigerant compressor (for example, a compressor) that sucks, compresses, and discharges the refrigerant, a condenser (for example, a condenser) that condenses the atomized refrigerant that has become high temperature and high pressure by the refrigerant compressor, It is a well-known device that circulates the refrigerant in the order of the decompression expansion device (for example, expansion valve) that decompresses the refrigerant condensed by the evaporator, and the evaporator (evaporator) that evaporates the refrigerant decompressed by the decompression expansion device. is there.

The panel 10 includes an air conditioner (A / C) switch 12, a mode (MODE) switch 14, an air volume switch 16, an off (OFF) switch 18, and an auto (AUT).
O) A switch 20 is provided. Air conditioner switch 12
Is a refrigerant compressor drive that determines whether or not the operator operates the above-mentioned magnet clutch, that is, whether to rotate the drive shaft of the refrigerant compressor to suck, compress, or discharge the refrigerant. It is a decision switch.

The mode switch 14 is provided in the passenger compartment, and is a face mode in which air is blown from a face outlet (not shown) for blowing air toward the upper half of the occupant, and air is blown toward the lower half of the occupant. Foot mode to blow air from a foot outlet (not shown) to do so, bi-level mode to blow air from both the face outlet and the foot outlet, mainly toward the inner surface of the windshield of the vehicle It is a mode changeover switch for selecting in which of the defroster modes in which the air is blown out from the defroster outlet (not shown) in which the air conditioner is operated.

The mode switch 14 of this embodiment is
The mode is switched in the cycle of the face mode, the bi-level mode, the foot mode, and the defroster mode, that is, each time the mode switch 14 is pressed, the mode is sequentially switched. The air volume switch 16 is a blown air volume setting switch that determines the air volume blown out from the above-described air outlet according to the operator's intention.

Here, the air volume switch 16 employs a seesaw type push switch, and DOWN and UP are displayed on the left and right parts in FIG. That is, pressing the right side of the air volume switch 16 can increase the amount of air blown from the air outlet, while pressing the left side of the air volume switch 16 can decrease the amount of air blown from the air outlet.

The off switch 18 is a vehicle air conditioner operation stop switch for stopping all operations of the vehicle air conditioner. The auto switch 20 calculates by the ECU the target outlet temperature of the air blown from the above-mentioned outlet so that the passenger compartment temperature becomes the set temperature set by a temperature setting machine (not shown) that sets the passenger compartment temperature. Further, according to the target outlet temperature, the ECU (not shown) calculates and determines the amount of air to be blown out from which outlet so that the occupant is in the most comfortable air conditioning state. It is an air conditioning state automatic control switch that automatically controls various functional parts connected to.

Note that, once the auto switch 20 is pressed by the operator, it automatically controls various air-conditioning states as described above. However, when the mode switch 14 is pressed by the operator thereafter, the operator is The vehicle air conditioner operates in the desired mode. That is, the only mode is
The air volume and the operation of the compressor are automatically controlled by the operator's intention. The same applies to the air conditioner switch 12 and the air volume switch 16.

FIG. 1 is a sectional view taken along line AA of FIG. 2, and the internal structure of the panel 10 will be specifically described with reference to FIG. In the internal structure of the panel 10, the structure on the right side and the left side of the air volume switch 16, that is,
Since the structure of the air conditioner switch 12 and the mode switch 14, and the structure of the off switch 18 and the auto switch 20 are the same, here, the air conditioner switch 12
The mode switch 14 will be described.

The air conditioner switch 12 and the mode switch 14 are switch knobs 22 and 23, which are the operating portions directly touched by the operator, from the upper side to the lower side in FIG. 2, and are fixed and interlocked with the switch knobs 22 and 23. Part 24,
25, a rubber plate 28, a printed circuit board 26 on which electric wiring is printed, and a case 30 for housing these functional parts.

The case 30 is made of ABS resin and has a box-like shape with one side open. The case 30 is formed with storage portions 34 and 35 that are recessed inward from the bottom wall 32 of the case 30 in the shape of a rectangular tube. Middle part 2
4 and 25 are made of ABS resin and are formed in a rectangular tube shape. The intermediate portions 24 and 25 are disposed inside the storage portions 34 and 35 of the case 30, and one end of the intermediate portions 24 and 25 projects outward with respect to the bottom wall 32 of the case 30. Also, the case 30
Sliding portions that are slidable in the vertical direction in FIG. 1 are formed in the storage portions 34 and 35 and the intermediate portions 24 and 25, respectively (not shown).

The switch knobs 22 and 23 are made of ABS resin and formed into a cup shape. Further, it is arranged so as to cover the outer peripheries of the intermediate portions 24 and 25 from above in FIG. The printed circuit board 26 is electrically connected to the ECU, and has an air conditioner switch 12, a mode switch 14,
Signals from the air volume switch 16, the off switch 18, and the auto switch 20 are used to control various functional parts via the ECU.

The rubber plate 28 is formed of silicon rubber in a plate shape, and is arranged so as to cover the upper surface of the printed board 26. The rubber plate 28 is integrally formed with a plurality of protruding portions 40 and 41 that protrude upward in FIG. 1 and are recessed in a mortar shape. Then, inside the protrusions 40 and 41, contact portions (not shown) for transmitting electric signals to the ECU by contacting switch contacts (not shown) described later are arranged.

The printed circuit board 26 includes the printed circuit board 26.
Two switch contacts are provided that are electrically connected to the air conditioner switch 12 and the mode switch 14 to convert an operator's instruction into an electric signal. To the ECU to control various functional parts. That is, the switch contacts and the protrusions 40 and 41 constitute switch elements 36 and 37 that convert an operator's instruction into an electric signal.

Further, on the printed circuit board 26, a light emitting element, specifically, a lamp 38 (light emitting diode) is arranged between the switch element 36 and the switch element 37. The lamp 38 illuminates the inner surfaces of the switch knobs 22 and 23, and allows the operator to visually recognize the design of the switch knob at night. The printed board 26 on which the rubber plate 28 is arranged is arranged on the opening side of the case 30 so that the other ends of the intermediate portions 24 and 25 come into contact with the protruding portions 40 and 41 of the rubber plate 28. .

In such a switch, for example, when the switch knob 22 is pushed downward from above in FIG. 1, the protruding portion 40 of the rubber plate 28 is pushed through the intermediate portion 24,
The contact portion of the protrusion 40 and the switch contact come into contact with each other. Then, after this contact, the switch knob 22 is pushed back by the elastic force of the protrusion 40 and returns to a predetermined position. Less than,
The structure of the air volume switch 16 to which the seesaw type push switch device of the present invention is applied will be described with reference to FIG.

The air volume switch 16 is the same as the air conditioner switch 12 and the mode switch 14 described above, and is the case 30.
It is disposed in a storage portion 33 that is recessed inward from the bottom wall 32 in the shape of a rectangular tube. The air volume switch 16 includes a printed circuit board 26, a rubber plate 28, a first operation portion 43, and a second operation portion 44 in order from the lower side to the upper side in FIG.

The printed circuit board 26 is provided with switch contacts (not shown) similar to the switch elements 36 and 37 described above. In addition, the rubber plate 28 has a mortar-shaped protruding portion 3 whose inside is recessed at a position facing the contact portion.
9 and 47 are formed, and a contact portion (not shown) is arranged inside thereof. That is, the switch contact 4 and the protrusions 39 and 47 (not shown) are used to switch the switch element
5 and 46 are configured.

A light emitting element electrically connected to the printed board 26, specifically, a lamp 48 is arranged between the switch elements 45 and 46. The first operating portion 43 is bilaterally symmetric with respect to a vertical bisector D of a line segment connecting the switch elements 45 and 46 arranged on the printed board 26. The first operation unit 43 has a bridge girder shape and is parallel to the upper surface of the printed circuit board 26.
9, switch elements 45, 4 from both ends of the first parallel portion 49
6 and two end portions 52, which are vertically extended and are in contact with the protruding portions 39 and 47 of the rubber plate 28.

The first operating portion 43 includes a switch element 45,
On the vertical bisector D of 46, the axial direction thereof extends from the back side of the paper surface of FIG. 1 to the upper side of the paper surface, and the first rotating shaft 54 that constitutes the first fulcrum of the present invention is arranged. And this second
Since both ends of the rotating shaft 54 are rotatably supported by the case 30, the first operating portion 43 can rotate about the first rotating shaft 54 in the direction indicated by the arrow A in FIG. 1.

The second operating portion 44 also has a structure similar to that of the first operating portion 43, and is centered on the vertical bisector D of the switch elements 45 and 46 arranged on the printed circuit board 26. It is symmetrical. Then, the second operation unit 44
Is a second parallel portion 50 parallel to the upper surface of the printed circuit board 26,
Vertically extending from both ends of the second parallel portion 50 toward the switch elements 45, 46, and the end surface thereof is the first operating portion 44.
The second foot portion 51 is in contact with the second parallel portion 49 of the. Here, the first foot portion 52, the second foot portion 51, and the printed circuit board 26.
The switch contact (not shown) and the contact portions in the protrusions 39 and 47 are arranged on a line perpendicular to the upper surface of the printed board 26.

The second operating portion 44 has its axial direction on the vertical bisector D of the switch elements 45 and 46 in FIG.
A second rotation shaft 53, which constitutes the second fulcrum of the present invention, is disposed from the back side of the middle page toward the upper side of the page. And
Since both ends of the first rotating shaft 53 are rotatably supported by the case 30, the second operating unit 44 can rotate about the second rotating shaft 53 in a direction indicated by an arrow B in FIG. Become.

The operation and structure of this push-type seesaw switch will be described in detail below. FIG. 3 shows a schematic view of a main part of the push-type seesaw switch. The axis perpendicular to the upper surface of the printed circuit board 26 in FIG. 3 is the Y axis, and the axis perpendicular to this Y axis is the X axis. In addition, the contact points (not shown) of the protrusions 39 and 47, the first foot portion 52 of the first operation portion 43, the second foot portion 51 of the second operation portion 44, and a perpendicular line perpendicular to the upper surface of the printed circuit board 26. On C. The end portions of the first foot portion 52 and the second foot portion 51 have a hemispherical shape, and the lowest points thereof are the protrusions 39 and 47 and the first operation portion 43, respectively.
It is in contact with the parallel portion 49.

Now, the operator operates the second operation unit 44 in the Y-axis direction.
Is moved by S0. At this time, the second operating portion 44 rotates by θ in the direction of arrow B about the second rotating shaft 53 (indicated by a chain double-dashed line in the figure). And along with this, the second
A contact point 55 forming the second contact point of the present invention where the foot portion 51 and the second parallel portion 50 contact each other rotates by θ ′. (Here, the end portion of the second foot portion 52 has a hemispherical shape, and the contact point 55
, The first operating portion 43 rotates and moves leftward in FIG. 3, so θ ′ becomes an angle slightly smaller than θ. Further, the amount of movement of the contact point 55 in the Y-axis direction at this time is S1.

On the other hand, the second operating portion 44 rotates by θ,
The second foot portion 51 of the operating portion 44 of the first operating portion 43
In order to press the parallel part 49, the first operation part 43 is
It is assumed that it has rotated (the state of the first operation portion 43 at this time is indicated by a two-dot chain line in FIG. 3). And the 1st foot part 52 at this time
The contact point 56, which is the first contact point of the present invention, is moved by S2 in the Y-axis direction (the distance by which the protrusion 47 is crushed in the Y-axis direction). Further, the distance from the perpendicular C to the second rotating shaft 53 is L, the distance between the second rotating shaft 53 and the contact portion 55 is M, the distance between the first rotating shaft 54 and the contact point 56 is N, and the second rotating shaft. The acute angle formed by the line connecting 53 and the contact point 55 and the perpendicular bisector D is θ0, and the acute angle formed by the line connecting the first rotating shaft 54 and the contact point 56 and the perpendicular bisector D is φ.
Set to 0.

Then, the above-mentioned S0, S1, S2, L,
The following relational expressions hold for M, N, θ, θ0, θ′φ, φ0, and φ ′.

[0035]

[Equation 1] S0 = L · tan θ

[0036]

## EQU00002 ## S1 = M (cos (.theta.0-. Theta. ')-Cos .theta.
0)

[0037]

## EQU00003 ## S2 = N (cos (.phi.0 -.phi. ')-Cos.phi.
0) Further, the following relational expression holds for θ0 and φ0.

[0038]

[Equation 4] θ 0 = sin ⁻¹ (L / M)

[0039]

## EQU00005 ## .phi.0 = sin.sup.- ¹ (L / N) Here, assuming that the movement amounts of the contact points 55 and 56 in the X-axis direction are X1 and X2, the following relational expression holds.

[0040]

X1 = LM−sin (θ0−θ ′)

[0041]

## EQU00007 ## X1 = L-S1 / tan.phi.

[0042]

## EQU00008 ## X2 = O-N.sin (.phi.0-.phi. ') Here, it is assumed that X1> X2. From equations 6 and 8,

[0043]

[Equation 9] LM · sin (θ0−θ ′)> ON · s
The relational expression in (φ 0 −φ ′) can be derived.
That is, to satisfy this relational expression, L, N, M,
By setting O, θ0, θ ′, φ0, φ ′, it is possible to reduce the deviation between the contact portion 56 and the protruding portions 39 and 47, and it is possible to eliminate the contact failure of the switch.
Further, conventionally, in order to reduce this deviation, the two intermediate portions are arranged below the operating portion, but in the present invention, the second intermediate portion is provided.
Only one operation unit 43 is required, the number of parts can be reduced, and an inexpensive push-type switch device can be provided.

In the present embodiment, O = L, and from equations (2), (6) and (7),

[0045]

Φ = tan ⁻¹ ((cos (θ ⁰ −θ ′) −
cos θ0) / sin (θ0 −θ ′)) Further, from the equation (1),

[0046]

Θ = tan ⁻¹ S0 / L Here, θ, φ and θ ′, φ ′ can be determined by the structure of the first operation unit 43 and the second operation unit 44, but are simplified. In order to realize, both are made equal.

[0047]

[Equation 12] θ ′ = θ

[0048]

Φ ′ = φ The above relational expressions (3), (4), (5), (9), (10) (1
1) From (12) and (13), the following relational expressions of S0 and S2 are established.

[0049]

S2 = N (cos ((sin ⁻¹ (L /
N)) / θ0) -tan ^-1 ((cos (sin ^-1 (L /
M) -cos (sin ^-1 (L / M))-tan ^-1 (S0
/ L))) / sin (sin ^-1 (L / M) -tan
^-1 (S0 / L))))-cos (sin ^-1 (L /
M))) Further, when the relationship between S0 and S2 obtained from Expression 14 is shown by a function G, the following expression is obtained.

[0050]

[Equation 15] S0 = G (S2, L, M, N) Here, the relationship between the operating load F2 of the protrusion 39 and the movement amount S2 in the Y-axis direction can be expressed by the following formula when expressed as a function H.

[0051]

F2 = H (S2) Further, the second operation unit 44 is operated (that is, pushed in).
The relation between the operating load F0 and the movement amount S0 in the Y-axis direction when the above is represented by the function I can be expressed by the following equation.

[0052]

F0 = I (S0) Therefore, even if a switch (F2 = H (S2)) having a specific characteristic is used from Equations 15 to 17,
A switch having different characteristics can be realized by the structurally determinable constants such as L, M, and N. That is, conventionally, the operating load F0 is determined by the elastic force of the protrusions 39, 47 of the rubber plate 28, but by changing the structure of the seesaw type switch device as shown in FIGS. 4 to 6, respectively. The relationship between the operating load F0 and the movement amount S0 can be arbitrarily changed as shown in FIG.

[0053]

[0054]

Also, in the first embodiment, the first foot portion 52
The second foot portion 53 has a hemispherical shape, but may have any shape. Further, as shown in FIG. 8 , the first operating portion 43 may be flat. Further, as shown in FIG. 9 , the second operating portion 44 is flat and the first operating portion 43 is H.
Alternatively, the end of the lower leg 110 of the H-shape may be brought into contact with the switch elements 45 and 46, and the end of one upper leg 111 may be brought into contact with the second operating portion 44. .

[0056] The second operation unit 4, as shown in FIG. 1 0
4, the first operating portion 43 is turned upside down as compared with the first embodiment, and the first foot portion 52 is replaced by the first operating portion 43.
The first parallel portion 49 with the switch elements 45, 46.
You may make it contact | abut. Further, the second operation unit 44 and a flat plate shape as shown in FIG. 1 1, the first operating portion 43
Is made into an X-shape, the end of this X-shaped lower leg 112 is brought into contact with the switch elements 45, 46, and the end of one upper leg 113 is brought into contact with the second operating portion 44. Is also good .

[Brief description of drawings]

1 is a cross-sectional view taken along the line AA of FIG.

FIG. 2 is a front view of the panel according to the first embodiment of the present invention.

FIG. 3 is a detailed view of essential parts in the first embodiment.

FIG. 4 is a diagram showing another example of the present invention.

FIG. 5 is a diagram showing another example of the present invention.

FIG. 6 is a diagram showing another example of the present invention.

FIG. 7 is a diagram showing a relationship between an operation load Fo and an operation amount So.

FIG. 8 is a diagram showing another example of the present invention.

FIG. 9 is a diagram showing another example of the present invention.

FIG. 10 is a diagram showing another example of the present invention.

FIG. 11 is a diagram showing another example of the present invention.

[Explanation of symbols]

43 First Operation Unit 44 Second operation unit 45 switch element 46 switch element 53 1st rotation axis (1st fulcrum) 54 Second rotation axis (second fulcrum)

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01H 23/00

Claims (3)

(57) [Claims] 1. A two switch elements mounted side by side on a substrate, and supported by a first fulcrum provided between the two switch elements and in an upper region of the substrate to rotate, and
A first operating portion that abuts the two switch elements on one of the switch element side and the other switch element side with respect to the fulcrum of, and in a region between the switch elements and further above the first fulcrum. It is supported and rotated by the second fulcrum provided,
The second fulcrum and the second operative point that abuts the first operative section on one of the switch element side and the other of the switch element sides with respect to the second fulcrum and the second fulcrum; When any one side of the second operation portion is pushed downward around the fulcrum of, the switch element located below the second operation portion is pushed via the first operation portion. seesaw over type push switch device according to. 2. The first and second fulcrums are on a perpendicular bisector of a line segment that connects the two switch elements, and the first operating portion and the second operating portion have the vertical bisectors. The two switch elements, the first contact point where the first operation section and the second operation section contact each other, and the second operation section and the switch element are symmetrical with respect to the bisector line. And a second contact point, which is in contact with the substrate, is arranged on a perpendicular line standing perpendicular to the upper region of the substrate with respect to the substrate, and a first line segment distance connecting the first contact point and the first fulcrum. M, the distance between the second line segment connecting the second contact point and the second fulcrum is N, and the acute angle formed by the vertical bisector and the first line segment is θ.
0, the acute angle formed by the vertical bisector and the second line segment is φ
0, the shortest distance between the perpendicular and the first fulcrum is L, the shortest distance between the perpendicular and the second fulcrum is O, and
When one of the sides of the second operation portion is pushed downward around the second fulcrum, the rotation angle of the first line segment is θ ′, and the rotation angle of the second line segment is If φ ′, then L−Msin (θ0−θ ′)> O−Nsin (φ0−φ
') Set seesaw over type push switch apparatus according to claim 1, characterized in that to satisfy the condition of. 3. The first operating portion and the second operating portion each have a bridge girder shape having two foot portions, and the first foot portion of the first operating portion contacts the switch element, the second foot part of the second operation unit is brought into contact with it and seesaw over type push switch apparatus according to claim 1, wherein the first operation unit.