JP3593468B2 - Dustproof switch device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dustproof switch device suitable for a switch device used in an environment where dust or the like is likely to be applied, for example, a power window control switch device arranged in an armrest portion of a vehicle such as an automobile.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, many types of switch devices have been used as small switch devices mounted on automobiles and the like. In particular, for a switch device that is disposed in a portion where dust or the like is likely to be applied, a switch device having a dustproof sheet built in the case has been proposed in order to prevent dust from entering the case of the switch device.
[0003]
FIG. 9 is a sectional view schematically showing a configuration of a conventional dustproof switch device, and FIGS. 10 and 11 are plan views schematically showing operation modes of the dustproof switch device of FIG. 9 to 11, reference numeral 1 denotes a pole plate. The pole plate 1 is made of a material such as epoxy resin or ceramic, and has a plurality of switch electrodes 1a formed on an inner surface thereof. Reference numeral 2 denotes a case made of the same material as the pole plate 1, and a space 3 is formed inside the case 2 by elastically fitting the case 2 to the pole plate 1. In addition, a case opening 2 a is provided on the upper side of the case 2.
[0004]
Reference numeral 4 denotes a movable plate made of the same material as the pole plate 1, and the movable plate 4 is disposed in the space 3 so as to be movable in the left-right direction (the direction of the arrow shown in FIG. 9). On one surface of the movable platen 4, a movable platen boss 4a projecting outward through the case opening 2a is provided, and on the other surface of the movable platen 4, a movable contact piece made of an elastic material slidingly contacting the switch electrode 1a. 4b (usually a plurality) are provided. Reference numeral 5 denotes a dust-proof sheet made of a thin plate made of a material such as a black synthetic resin, and a dust-proof sheet opening 5a is formed substantially at the center of the dust-proof sheet 5. Further, the dustproof sheet 5 is sandwiched between one surface of the movable platen 4 and the inner surface of the case 2 in a press-contact state, and is also configured to slide in the left and right direction as the movable platen 4 moves in the left and right direction. Have been. Reference numeral 6 denotes a lead terminal, which electrically connects the switch electrode 1a to a printed circuit board (not shown).
[0005]
In the conventional dustproof switch device having the above-described configuration, for example, when an occupant of a vehicle such as an automobile operates an operation knob (not shown) of a power window switch to open and close a window glass, the operation force is increased by a movable platen. It is transmitted to the boss 4a. Thereby, the movable platen boss 4a located at the neutral position shown in FIG. 9 moves together with the movable platen 4 to the right as shown in FIG. 10 or to the left as shown in FIG. The movement of the movable platen boss 4a in the left-right direction is prevented by the contact with the left and right edges of the case opening 2a.
[0006]
When the movable platen 4 moves in the left-right direction together with the movable platen boss 4a, the dustproof sheet 5 sandwiched between one surface of the movable platen 4 and the inner surface of the case 2 in a press-contact state is shown in FIG. 10 or FIG. As shown in the drawing, the case opening 2 a is always closed by the movable platen 4 and the dustproof sheet 5 in order to move in the left-right direction. As a result, it is possible to prevent dust from entering the case 2 of the dustproof switch device.
[0007]
[Problems to be solved by the invention]
As described above, in the conventional dustproof switch device, the dustproof sheet 5 also moves simultaneously in the left and right directions along with the movement of the movable board 4 in the left and right directions together with the movable board boss 4a. It is closed by the dustproof sheet 5. However, the dustproof sheet 5 sandwiched between the one surface of the movable platen 4 and the inner surface of the case 2 in a press-contact state may cause a difference in the amount of movement due to a change in the degree of press-contact with the dustproof sheet 5. Therefore, there is a problem that the case opening 2a cannot be sufficiently closed, which causes a problem that the dust-proofing efficiency is reduced.
[0008]
As shown in FIG. 10 or 11, when the length of the case opening 2a is L, the movable platen 4 (shown by a broken line) moves along the length L of the case opening 2a together with the movable plate boss 4a. Accordingly, the dust-proof sheet 5 (indicated by a dashed line) moves within a distance range having a length substantially equal to the outer dimensions of the case 2 (about 2 L). That is, the sliding area in which the dust-proof sheet 5 moves needs a distance of about 2L. Therefore, the external dimensions of the case 2 are necessarily large, and there is a problem that it is difficult to reduce the external size of the case 2.
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem. Along with the movable platen boss moving in the left-right direction together with the movable platen boss, a shaft protruding from the inner surface of the case is rotatably pivoted. The supported substantially fan-shaped dustproof sheet is also configured to be rotatable in the left-right direction by a predetermined amount, thereby improving the dustproof efficiency of preventing dust from entering the case. An object of the present invention is to provide a dustproof switch device that can easily realize a reduction in the outer size of a case.
[0010]
According to a first aspect of the present invention, there is provided a dustproof switch device comprising: a pole plate having a switch electrode formed on an inner surface; a case elastically fitted to the pole plate; and a space formed by the case and the pole plate. A movable plate movably disposed; a movable plate boss protruding outward from one surface of the movable plate; and a movable contact piece provided on the other surface; and one surface of the movable plate and the case In the dustproof switch device having a dustproof sheet interposed between the dustproof sheet and the inner surface, the dustproof sheet is formed in a substantially fan shape, and a shaft hole provided below the dustproof sheet is provided on the inner surface of the case. The dustproof sheet is rotatably supported by being fitted to the protruding shaft portion, and the movable board boss is loosely fitted into a substantially V-shaped cutout provided above the dustproof sheet. the movable platen is close to the hand and the other side edge step portion of the movable plate, the upper Characterized in that the formation of the sliding protrusion in sliding contact with the dust-proof sheet.
[0011]
According to a second aspect of the present invention, there is provided a pole plate having a switch electrode formed on an inner surface thereof, a case elastically fitted to the pole plate, and movably disposed in a space formed by the case and the pole plate. between and the movable plate has a movable contact piece provided on one variable Doban boss and the other which projects outwardly from the plane of the face of the movable platen, and one surface and the cases of the inner surface of the movable plate A dustproof switch device having a dustproof sheet interposed in the
The dust-proof sheet is formed into substantially fan shape, pivotally supports the shaft hole portion provided on the lower side of the dust-proof sheet, freely fitted rotating the dust-proof sheet in the axial portion projecting from the inner surface of the case while, the notch portion of the substantially V-shape provided on the upper side of the dust-proof sheet, loosely fitted on the Symbol movable platen boss on one side of the pole base, the fitted position the recess of the mounting substrate a locking protrusion for projecting, on the other side surface, a plurality of collision raised portion for setting the distance between the printed circuit board for electrically connecting the lead terminals to a predetermined value, the lead the terminal is characterized in that a configuration Ru formed to protrude the pawl locking piece for securing to the printed circuit board.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
The dustproof switch device according to the present invention includes a substantially V-shaped notch provided above a substantially fan-shaped dustproof sheet rotatably supported on a shaft protruding from the inner surface of the case, and one of the movable plates is provided. The movable board boss protruding from the surface is loosely fitted, and with the movable board boss moving in the left-right direction, the dustproof sheet is similarly rotated in the left-right direction through the movable board boss by a predetermined amount. The configuration is such that it can be performed.
[0019]
In the dustproof switch device of the present invention having the above-described configuration, the neutral position of the movable platen boss in the left-right direction coincides with the neutral position of the dustproof sheet in the left-right rotation. The value of the amount of rotation of the dust-proof sheet in the left-right direction can be made smaller than the value of the amount of movement of the movable platen boss in the left-right direction. It is possible to significantly reduce it. As a result, it is possible to improve the dustproof efficiency of preventing dust from entering the case of the dustproof switch device, and to easily realize a reduction in the outer size of the case. It is most suitable for the case where it is adopted and implemented in a control switch device.
[0020]
【Example】
Hereinafter, embodiments of the present invention will be described. FIG. 1 is a partial cross-sectional plan view schematically showing a configuration in which a dustproof switch device according to an embodiment of the present invention is mounted on a mounting board and a printed board. FIG. 2 is a sectional view taken along line AA in FIG. FIG. 3 is a perspective view schematically showing a developed configuration of the dustproof switch device of FIG. 1, and FIGS. 4 and 5 are dustproof switches used in the dustproof switch device of FIG. 6 and 7 are plan views schematically showing an operation mode of the dustproof switch device of FIG. 1, and FIG. 8 is an inner surface of a case in the dustproof switch device of FIG. 1. It is a top view which shows roughly the operation aspect of the dust-proof sheet which was rotatably supported in the figure.
[0021]
1 to 8, the components denoted by the same reference numerals as those in FIGS. 9 to 11 have the same or similar structures. 1 to 8, reference numeral 1 denotes a pole plate. The pole plate 1 is made of a resin material such as glass-containing nylon, and has a plurality of switch electrodes 1a formed on the inner surface thereof. On one side surface of the pole plate 1, a locking projection 1 b is provided to protrude for positioning by fitting into the concave portion 7 a of the mounting board 7, and a lead terminal led out from the switch electrode 1 a is provided on the other side surface. A plurality of projections 1c for setting the distance between the printed circuit board 8 and the printed circuit board 8 electrically connected to each other to a predetermined value, and a locking piece 1d with a claw for fixing the lead terminal 6 to the printed circuit board 8 are provided. Each is protruding. A plurality of projections 1e are formed on the side surface of the pole board 1.
[0022]
Reference numeral 2 denotes a case made of a resin material such as polyacetal. On the inner surface of the case 2, a shaft portion 2b for rotatably supporting a dustproof sheet 5 described later, a side edge step portion 4c of the movable platen 4 and a sliding member are provided. The stopper projection 2c that comes into contact with the stopper 2b and the stopper 2d that restricts the amount of rotation of the dust-proof sheet 5 in the left-right direction to a predetermined value and that comes into sliding contact with the side edge step 4d are provided. A plurality of holes 2 e are formed on the side surface of the case 2 at positions corresponding to the protrusions 1 e of the pole board 1. When the case 2 is elastically fitted to the pole board 1, the plurality of projections 1 e of the pole board 1 are fitted into the corresponding plurality of holes 2 e of the case 2 to form a space 3 therein. You. In addition, a case opening 2 a is provided on the upper side of the case 2.
[0023]
Reference numeral 4 denotes a movable plate made of a resin material such as an ABS resin. The movable plate 4 is disposed so as to be movable in the left-right direction in the space 3. A movable plate boss 4a is provided on one surface of the movable plate 4 so as to protrude outward through the case opening 2a, and the other surface of the movable plate 4 has elasticity that slides on the plurality of switch electrodes 1a. A plurality of movable contact pieces 4b made of a material are provided. A groove 4e is formed around the movable platen boss 4a to reduce frictional resistance when slidingly contacting the dustproof sheet 5 described later. Around the groove 4e, a square ring-shaped sliding contact convex portion 4f that contacts the dustproof sheet 5 is formed. On the upper and lower side edges of the movable platen 4 are formed side edge steps 4d which are in sliding contact with the suppression projections 2c of the case 2. Next to the side edge step portion 4d, a sliding contact convex portion 4g that is in sliding contact with the dustproof sheet 5 is provided adjacent to the dustproof sheet 5. The movable platen 4 has a horizontal groove 4h between the sliding contact convex portion 4f and the sliding contact convex portion 4g, into which the shaft portion 2b for supporting the dustproof sheet 5 is loosely fitted.
[0024]
As shown in FIGS. 4 and 5, reference numeral 5 denotes a thin fan-shaped dust-proof sheet made of a material such as black synthetic resin, for example. A shaft hole portion 5b rotatably fitted to the provided shaft portion 2b is provided. Above the dustproof sheet 5, a substantially V-shaped notch portion 5c for loosely fitting the movable platen boss 4a is provided. I have. In addition, the substantially V-shaped notch 5c can be formed in the substantially V-shaped opening 5d as shown in FIG. 5, and further, the shape of the opening 5d can be substantially elliptical. It is.
[0025]
In the dustproof switch device of the present invention having the above configuration, when the movable platen boss 4a projecting outward from the case opening 2a of the case 2 is in the neutral position as shown in FIGS. Since the movable board boss 4a is loosely fitted in the groove of the substantially V-shaped notch 5c of the sheet 5, the neutral position of the movable board boss 4a in the left-right direction is set in the left-right direction of the dustproof sheet 5. And the rotation neutral position. Now, for example, when an occupant of a vehicle such as an automobile operates an operation knob (not shown) of the power window switch to open and close the window glass, the operation force is transmitted to the movable board boss 4a.
[0026]
When the movable platen boss 4a moves from the neutral position shown in FIG. 6 to the right direction shown in FIG. 7, the movable platen boss 4a simultaneously moves along the edge of the substantially V-shaped notch 5c of the dustproof sheet 5. 7, the dust-proof sheet 5 rotates rightward by a predetermined amount as shown in FIG. 7, and the right edge of the dust-proof sheet 5 comes into contact with the stopper 2d shown in FIG. You. The movable platen 4 also moves to the right along with the movable platen boss 4a. During this movement, the side edge step 4c of the movable platen 4 comes into sliding contact with the depressing projection 2c provided on the inner surface of the case 2, so that the movable platen 4 is moved. The occurrence of unnecessary movement during the movement of the vehicle is suppressed. On the other hand, when the movable platen boss 4a moves in the left direction, it operates in the same manner as the rightward movement.
[0027]
In the above-described dustproof switch device according to the present invention, the dustproof sheet 5 also rotates simultaneously by a predetermined amount in the left and right directions together with the movable platen boss 4a in the left and right direction as the movable platen 4 moves. And the dustproof sheet 5. Therefore, the value of the amount of rotation of the dustproof sheet 5 according to the present invention can be made smaller than the value of the amount of movement of the dustproof sheet 5 in the conventional dustproof switch device shown in FIG. It is possible to greatly reduce it. Therefore, the dustproof switch device of the present invention can further improve the dustproof efficiency as compared with the above-described conventional example, and can easily reduce the outer size.
[0028]
【The invention's effect】
As described above, according to the dustproof switch device of the present invention, as disclosed in claims 1 to 8, a substantially fan-shaped dustproof sheet rotatably supported on a shaft protruding from the inner surface of the case. A movable plate boss protruding from one surface of the movable plate is loosely fitted into a substantially V-shaped notch provided on the upper side of the movable plate, and the movable plate boss is moved together with the movable plate boss in the left-right direction. The dustproof sheet can be similarly rotated in the left-right direction by a predetermined amount via the movable platen boss.
[0029]
Therefore, compared to this type of conventional dustproof switch device, the dustproof switch device according to the present invention can further improve the dustproof effect of preventing dust from entering the case, and can reduce the outer size of the case. It has excellent effects such as easy realization of miniaturization.
[0030]
In the dustproof switch device according to the present invention, on the inner surface of the case, a suppression projection that slides on one side edge step of the movable plate and the stopper portion that slides on the other side edge step are formed. Thus, the upper and lower portions of the movable platen are held by the restraining projections and the stopper portion, thereby eliminating the backlash of the movable platen and improving the reliability as a switch.
[0031]
In the dustproof switch device according to the present invention, the movable platen has a sliding contact convex portion that is in sliding contact with the dustproof sheet near the one and the other side edge step portions of the movable platen. It is possible to reduce the frictional resistance with the contact convex portion and to smoothly rotate the dustproof sheet.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional plan view schematically showing a configuration in which a dustproof switch device according to an embodiment of the present invention is mounted on a mounting board and a printed board.
FIG. 2 is an enlarged sectional view schematically showing a configuration cut along the line AA in FIG.
FIG. 3 is a perspective view schematically showing a developed configuration of the dustproof switch device of FIG. 1;
FIG. 4 is an enlarged plan view schematically showing an example of the shape of a dustproof sheet used in the dustproof switch device of FIG.
FIG. 5 is an enlarged plan view schematically showing another example of the shape of the dustproof sheet used in the dustproof switch device of FIG.
FIG. 6 is a plan view schematically showing an operation mode of the dustproof switch device of FIG. 1;
FIG. 7 is a plan view schematically showing an operation mode of the dustproof switch device of FIG. 1;
8 is a plan view schematically showing an operation mode of a dustproof sheet rotatably supported on an inner surface of a case by the dustproof switch device of FIG. 1. FIG.
FIG. 9 is a sectional view schematically showing a configuration of a conventional dustproof switch device.
FIG. 10 is a plan view schematically showing an operation mode of the dustproof switch device of FIG. 9, when the movable platen is at a right position.
FIG. 11 is a plan view schematically showing an operation mode of the dustproof switch device of FIG. 9, when the movable platen is in a left position.
[Explanation of symbols]
1 Pole plate 1a Switch electrode 1b Locking protrusion 1c Projection 1d Locking piece with claw 1e Projection 2 Case 2a Case opening 2b Shaft 2c Suppression protrusion 2d Stopper 2e Hole 3 Space 4 Moving plate 4a Movable Board boss 4b Movable contact piece 4c Side edge step 5 Dustproof sheet 5a Dustproof sheet opening 5b Shaft hole 5c Notch 5d opening 6 Lead terminal 7 Mounting board 7a Recess 8 Printed board

Claims (2)

A pole plate having a switch electrode formed on an inner surface thereof, a case elastically fitted to the pole plate, a movable plate movably disposed in a space formed by the case and the pole plate, and a movable plate A movable plate boss protruding outward from one surface, a movable contact piece provided on the other surface, and a dustproof sheet interposed between one surface of the movable plate and the inner surface of the case are provided. In the dustproof switch device,
The dustproof sheet is formed in a substantially fan shape, and a shaft hole provided on the lower side of the dustproof sheet is fitted to a shaft protruding from the inner surface of the case to rotatably support the dustproof sheet. At the same time, the movable platen boss is loosely fitted into a substantially V-shaped notch provided above the dustproof sheet ,
A dust-proof switch device , wherein the movable plate has a sliding contact protruding portion that is in sliding contact with the dust-proof sheet near the one and other side edge steps of the movable plate . A pole plate having a switch electrode formed on an inner surface thereof; a case elastically fitted to the pole plate; a movable plate movably disposed in a space formed by the case and the pole plate; comprising a movable contact piece from one surface provided on the movable platen volume scan and the other projecting from the outer surface, and a dust-proof sheet interposed between the inner surface of one side and the case of the movable plate In the dustproof switch device,
The dust-proof sheet is formed into substantially fan shape, pivotally supports the shaft hole portion provided on the lower side of the dust-proof sheet, freely fitted rotating the dust-proof sheet in the axial portion projecting from the inner surface of the case while, the notch portion of the substantially V-shape provided on the upper side of the dust-proof sheet, loosely fitted on the Symbol movable platen boss,
On one side of the pole board, a locking projection is provided for positioning by fitting into the recess of the mounting board, and on the other side, between a printed board for electrically connecting lead terminals. the distance and a plurality of protrusions for setting a predetermined value, characterized in that said lead terminal has a configuration Ru formed to protrude the pawl locking piece for securing to the printed circuit board Dustproof switch device.

Images