JP2005322422A - Seating detection switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid an operation failure as much as possible in a sheet-like switch comprising a film-like base, a flat spacer, and a film-like member. <P>SOLUTION: In a film-like seating detection switch 1, the film-like base 3 is overlapped to one surface of the film-like spacer 5, and a film-like member 7 is overlapped to the other surface of the spacer 5. The seating detection switch comprises a first probe 9 provided on a surface at the side of the film-like member 7 of the film-like base 3, a second probe 11 provided on the surface at the side of the film-like base 3 of the film-like member 7 opposite to the first probe 9, a through hole 13 provided at the part of the spacer 5 corresponding to the first and second probes 9, 11, and an air vent 15 passing from the through hole 13 to the side of the spacer 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a seating detection switch for detecting whether or not an occupant is seated on a seat.

  Conventionally, a seating detection switch for detecting whether or not an occupant is seated on a seat in a passenger car or the like is known (for example, see Patent Document 1).

  As shown in FIG. 14, the seating detection switch 100 is disposed between a seat main body 124 on which an occupant is seated and a seat skin 126, and upper and lower contactors that respectively support a pair of facing contacts 108 and 118. It consists of support films 102 and 106 and spacers 104 inserted between these films.

  More specifically, the lower contactor support film 106 supports the lower contactor 118, and the upper contactor support film 102 includes the upper contactor 108 from the lower contactor 118. It is supported in a state of being slightly separated in the vertical direction.

  The spacer 104 is formed with a contact receiving hole 114 for receiving the upper contact 108 and the lower contact 118 and a vent hole 116 communicating with the contact receiving hole 114.

  Further, an exhaust port 112 communicating with the vent hole 116 of the spacer 104 is formed in the lower contact support film 106.

  FIG. 15 is a top view of the seating detection switch 100.

  In the seating detection switch 100, when an occupant is seated on the seat, the upper contact 108 is pushed in the direction of arrow A in FIG. 14 and comes into contact with the lower contact 118, thereby connecting the electric contacts connected to the contact. The detection circuit is turned on and the seating of the passenger is detected.

At that time, the air in the contact accommodating hole 114 is discharged to the outside of the sheet along the direction of arrow B through the vent hole 116 and the exhaust port 112.
JP-A-10-188725

  However, in the seating detection switch 100, the opening of the exhaust port 112 is in contact with the seat main body 124, so that the exhaust port 112 is closed. Or even if it is not completely obstructed, the air flow is poor.

  Accordingly, the air in the contact receiving hole 114 is not easily discharged, and the contacts 108 and 118 of the seating detection switch 100 are not easily contacted with each other, or the contacted ones are not easily separated from each other. There is a problem that may cause malfunction.

  The problem also occurs when the exhaust port 112 is located on the skin 126 side.

  The present invention has been made in view of the above problems, and in a sheet-like seating detection switch composed of a film-like base material, a plate-like spacer, and a film-like member, malfunction can be avoided. An object is to provide a seating detection switch.

  The invention according to claim 1 is a film-like structure formed by superposing a film-like base material on one surface of a film-like spacer and superposing a film-like member on the other surface of the film-like spacer. In the seating detection switch, the first contact provided on the film-like member-side surface of the film-like base material and the film-like member-side surface of the film-like member, the first contact A second contact provided opposite to the child, a through hole provided in a portion of the spacer corresponding to the first contact and the second contact, and the spacer from the through hole A seating detection switch having a ventilation hole penetrating to the side surface of the seat.

  The invention described in claim 2 is a film-like structure configured by superimposing a film-like base material on one surface of a film-like spacer and superposing a film-like member on the other surface of the film-like spacer. In the seating detection switch, the first contact provided on the film-like member side surface of the film-like substrate, and the first contact on the film-like member-side surface of the film-like substrate A second contactor provided slightly away from the child, and provided on the surface of the film-like member on the film-like substrate side so as to face the first contactor and the second contactor. A third contact, a through hole provided in a portion of the spacer corresponding to the first contact, the second contact, and the third contact, and the spacer from the through hole With vents that penetrate to the side of the A seating detection switch.

  According to a third aspect of the present invention, in the seating detection switch according to the first or second aspect, the vent hole is a seating detection switch that is bent and provided in the spacer.

  According to a fourth aspect of the present invention, in the seating detection switch according to any one of the first to third aspects, the side surface of the spacer and the width of the vent hole in the vicinity of the side surface are the same as the width of the spacer. The seating detection switch is wider than the width of the vent hole between the through hole and the vicinity of the side surface of the spacer.

  According to a fifth aspect of the present invention, in the seating detection switch according to the fourth aspect, the side surface of the spacer and a portion of the film-like base material corresponding to the vent hole formed wide in the vicinity of the side surface are provided. Is a seating detection switch provided with a notch or a through hole.

  The invention according to claim 6 is the seating detection switch according to any one of claims 1 to 5, so as to cover the opening portion of the vent hole formed in the outer shape portion of the seating detection switch. A seating detection switch provided with a waterproof breathable sheet.

  According to the present invention, in a sheet-like seating detection switch constituted by a film-like base material, a plate-like spacer, and a film-like member, there is an effect that malfunction can be avoided as much as possible.

[First Embodiment]
FIG. 1 is a top view of a seating detection switch 1 according to a first embodiment of the present invention installed on a seat of an automobile or the like, and FIG. 2 is a cross-sectional view of the seating detection switch 1.

  As shown in FIG. 2, the seating detection switch 1 is disposed, for example, between the skin 126 of the seat 122 on which a person is seated and the seat main body 124, and operates according to the weight of the occupant seated on the seat 122. It detects whether a passenger is seated.

  As shown in FIGS. 1 and 2, the seating detection switch 1 is formed between a lower contact support film (film-like base material) 3 and an upper contact support film (film-like member) 7. The spacer 5 is interposed to form a film (sheet) as a whole.

  The lower contact piece support film 3, the film-like spacer 5, and the upper contact piece support film 7 are all made of a flexible insulator such as PET resin, and in FIG. 1 and FIG. It has a rectangular shape extending long.

  More details are as follows.

    FIG. 3 is a diagram showing a schematic configuration of the lower contact support film 3.

  As shown in FIGS. 2 and 3, a circular first contact (contact part) 9 is provided at one end (the left end in FIGS. 2 and 3) of the upper surface of the lower contact support film 3. Thinly attached.

  A first conduction path 21 for connecting the first contactor 9 to another electrical device or the like is further provided on the upper surface of the lower contactor support film 3 so as to extend linearly in the longitudinal direction. It has been.

  Further, an arc-shaped cutout 17 is provided on one long-axis side surface 3A of the lower contact support film 3 as an auxiliary exhaust port that communicates with a later-described vent hole.

  FIG. 5 is a diagram showing a schematic configuration of the upper contactor support film 7.

  As shown in FIG. 5, a circular second contact 11 facing the first contact 9 is provided at one end (left end in FIG. 5) of the lower surface of the upper contact support film 7. The contactor 9 is thinly fixed and provided slightly apart in the vertical direction.

  Further, on the lower surface of the upper contact support film 7, a second conduction path 23 is connected to the first conduction path 21 for connecting the second contact 9 to another electrical device or the like. It is provided so as to extend long in parallel.

  FIG. 4 is a diagram showing a schematic configuration of the spacer 5.

  As shown in FIGS. 2 and 4, the spacer 5 has a thickness in order to accommodate the first contactor 9 and the second contactor 11 in the left part of each spacer 5 in each drawing. A circular contact accommodating hole 13 penetrating in the direction is provided.

  Further, the spacer 5 is provided with a vent hole 15 that extends in the left-right direction in FIGS. 4 and 5 and communicates from the contact accommodating hole 13 to the long side surface 5 </ b> A of the spacer 5.

  The vent hole 15 is formed by the following method.

  That is, it extends from the contactor receiving hole 13 to an intermediate portion in the other end side direction (rightward direction in the drawing) of the spacer 5 and bends at a right angle to the lower side in FIG. The spacer 5 is provided with a notch groove 14 having an enlarged portion 14A on the side surface 5A.

  Then, the spacer 5 provided with the notch groove 14 is sandwiched between the lower contact support film 3 and the upper contact support film 7.

  Thus, a vent hole 15 is formed which communicates from the contact hole 13 to the side surface 5A of the spacer 5 and has an enlarged exhaust port 15A on the side surface 5A.

  As shown in FIG. 4, the width W1 of the exhaust port 15A is wider than the width W3 of the main portion of the vent hole 15. More specifically, for example, the cross-sectional shape of the exhaust port 15A is formed in the shape of a figure formed when a circle is cut along a straight line.

  Further, as already described, the auxiliary exhaust port 17 (see FIG. 3) formed in the lower contact support film 3 has a spacer 5 between the lower contact support film 3 and the upper contact support film 7. Is disposed so as to communicate with the enlarged exhaust port 15A. As shown in FIG. 1, the auxiliary exhaust port 17 is designed to have a diameter smaller than the radius of the enlarged exhaust port 15A.

  With the above configuration, when an occupant is seated on the seat 122, the upper contactor support film 7 and the lower contactor support film 3 are bent, and the contactors 9 and 11 are brought into contact with each other, so that the occupant is seated. Is detected.

  At that time, the air in the contact receiving hole 13 passes through the vent hole 15, the enlarged exhaust port 15 </ b> A, and the auxiliary exhaust port 17 along the direction of the arrow C (see FIG. 4). Discharged to the side.

  In the seating / sitting detection switch 1, when the occupant is seated, the enlarged exhaust port 15A or the auxiliary exhaust port 17 is not likely to be blocked by the sheet material. Therefore, the air in the contact accommodating hole 13 is easily discharged out of the sheet, and the contacts 9 and 11 are reliably contacted.

  According to the seating detection switch of this embodiment, the following advantages 1 to 5 are obtained.

  1. The pressure of the contactor receiving hole 13 of the spacer 5 can be kept substantially constant, and the lower contactor support film 3 and the upper contactor support film 7 provided with the respective contacts 9 and 11 can It is easy to bend, and even if it bends easily, it can be easily restored, and malfunction of the seating detection switch 1 can be avoided.

  2. Since the vent hole 15 is bent, dust or the like is unlikely to enter the space formed in the contact accommodating hole 13, so that contact failure of the contact is unlikely to occur.

  3. As the width of the vent hole 15 increases as the side surface 5A of the spacer 5 is approached, the opening portion of the vent hole 15 in the side surface 5A of the spacer 5 is crushed, thereby closing the opening portion. There is no fear.

  4). Since the shape of the vent hole 15 is formed by a smooth curve such as the shape of one figure formed when a circle is cut by a straight line, the occurrence of stress concentration in the spacer 5 can be suppressed.

  5). Since the notch 17 having a size that can be accommodated in the enlarged exhaust port 15A is provided in the lower contactor support film 3, the opening of the vent hole 15 is more difficult to block. Further, since the diameter of the notch 17 is smaller than the diameter of the exhaust port, a decrease in strength against the external force of the seating detection switch 1 due to the provision of the notch 17 can be reduced. Further, since the diameter of the auxiliary exhaust port 17 is smaller than the diameter of the cross-sectional shape of the enlarged exhaust port 15A, the opening of the sheet member 124 into the enlarged exhaust port 15A is not blocked.

  The expanded exhaust port 15A may have a triangular shape as shown in FIG. 6 or a rectangular shape as shown in FIG.

  The auxiliary exhaust port 17 communicating with the enlarged exhaust port 15A may be provided in the upper contact support film 7 or provided in both the lower contact support film 3 and the upper contact support film 7. Also good.

  FIGS. 8-10 shows the example which provided the waterproof ventilation sheet 19 in the said expanded exhaust port 15A.

  8 is a side view of the seating detection switch 1, FIG. 9 is a view showing the arrow IX in FIG. 8, and FIG. 10 is a view showing the arrow X in FIG.

  As well shown in FIG. 9, the waterproof ventilation sheet 19 is formed in a plate shape with a circular cross section so as to cover the enlarged exhaust port 15 </ b> A present on the side surface 1 </ b> A of the seating detection switch 1. It is provided (to close).

  Since the seating detection switch 1 is thin, the waterproof breathable sheet 19 is not limited to the portion of the side surface 5A of the spacer 5 where the exhaust port 15A is provided, but also the upper contactor support film 7 adjacent to this portion. The side surface 7A and a part of the side surface 3A of the lower contact support film 3 are also covered. In other words, the waterproof breathable sheet 19 also covers the auxiliary exhaust port 17.

  According to the seating detection switch 1 provided with the waterproof breathable sheet 19, dust, moisture, etc. pass through the vent hole 15 and are formed in the space formed in the seating detection switch 1 (in the contact receiving hole 13). ) And the contact 9 and 11 are less likely to migrate, and poor conduction is less likely to occur.

[Second Embodiment]
FIG. 11 shows a schematic configuration of a seating detection switch 31 according to the second embodiment of the present invention.

  The difference between the seating detection switch 31 according to the second embodiment and the seating detection switch 1 according to the first embodiment is the structure of the contact, and the other points are the same as the seating detection switch 1.

  More specifically, in the seating detection switch 31 of the second embodiment, the spacer 5 (see FIG. 4) is provided between the lower contact support film 33 and the upper contact support film 37, as in FIG. Inserted and configured as a sheet as a whole.

  FIG. 12 shows a schematic configuration of the lower contact support film 33.

  As shown in the figure, the upper contact support film 33 is connected to an electric circuit via conductors 41 and 45 on the upper surface of the lower contact support film 33, and is brought into contact with each other to turn on the electric circuit. 39 and 43 are provided.

  As shown in FIG. 13, the upper contact support film 37 is provided with a bridge contact 47 that bridges the contacts 39 and 43 when the opposed contacts 39 and 43 are connected.

  In addition, as shown in FIG. 11, a contact accommodating hole 13 is provided in a portion of the spacer 5 corresponding to the opposed contacts 39, 43 and the bridge contact 47, and the contact accommodating hole A vent hole 15 penetrating from 13 to the side surface of the spacer 5 is provided in the same manner as the seating detection switch 1 of the first embodiment.

  In a normal state, the opposed contacts 39, 43 and the bridge contact 47 are separated from each other via the spacer 5, and the seating detection switch 31 is turned off. On the other hand, when the occupant is seated on the seat, At least one of the lower contact support film 33 and the upper contact support film 37 bends, the opposing contacts 39 and 43 come into contact with each other via the bridge contact 47, and the seating detection switch 31 is turned on.

  Further, when the seating detection switch 31 is turned on and off, the air passes through the vent hole 15 and enters and exits the space formed by the contact accommodating hole 13.

  In the seating detection switch 31, as in the case of the seating detection switch 1, a waterproof ventilation sheet may be provided.

It is a figure which shows schematic structure of the seating detection switch concerning the 1st Embodiment of this invention. It is a figure which shows the state which installed the seating detection switch in seats, such as a motor vehicle, and is a figure which shows the II arrow view of the seating detection switch shown in FIG. It is a figure which shows schematic structure of the lower side contactor support film which comprises a seating detection switch. It is a figure which shows schematic structure of the spacer which comprises a seating detection switch. It is a figure which shows schematic structure of the upper side contactor support film which comprises a seating detection switch. It is a figure which shows the modification of the vent provided in the spacer of the seating detection switch. It is a figure which shows the modification of the vent provided in the spacer of the seating detection switch. It is a figure which shows the state which provided the waterproof breathable sheet in the seating detection switch so that the opening part of the ventilation hole of a seating detection switch might be covered. It is a figure which shows the IX arrow in FIG. It is a figure which shows the X arrow view in FIG. It is a figure which shows schematic structure of the seating detection switch which concerns on the 2nd Embodiment of this invention. It is a figure which shows schematic structure of the lower side contactor support film which comprises a seating detection switch. It is a figure which shows schematic structure of the upper side contactor support film which comprises a seating detection switch. It is a figure which shows schematic structure of the conventional seating detection switch. It is a top view of the conventional seating detection switch.

Explanation of symbols

1, 31 Seating detection switch 3, 33 Lower contact support film 5 Spacer 7, 37 Upper contact support film 9, 11, 39, 43, 47 Contact 15 Ventilation hole 17 Notch 19 Waterproof ventilation sheet

Claims (6)

In a film-like seating detection switch configured by superposing a film-like base material on one surface of a film-like spacer and superposing a film-like member on the other surface of the film-like spacer,
A first contact provided on the film-like member side surface of the film-like substrate;
A second contact provided on the surface of the film-like member on the side of the film-like substrate so as to face the first contact;
A through hole provided in a portion of the spacer corresponding to the first contact and the second contact;
A vent hole penetrating from the through hole to a side surface of the spacer;
A seating detection switch comprising: In a film-like seating detection switch configured by superposing a film-like base material on one surface of a film-like spacer and superposing a film-like member on the other surface of the film-like spacer,
A first contact provided on the film-like member side surface of the film-like substrate;
A second contact provided on the surface of the film-like substrate on the film-like member side slightly away from the first contact;
A third contact provided on the surface of the film-like member on the side of the film-like base material so as to face the first contact and the second contact;
A through hole provided in a portion of the spacer corresponding to the first contact, the second contact, and the third contact;
A vent hole penetrating from the through hole to a side surface of the spacer;
A seating detection switch comprising: In the seating detection switch according to claim 1 or 2,
The seating detection switch, wherein the air hole is bent and provided in the spacer. In the seating detection switch according to any one of claims 1 to 3,
The width of the vent hole in the side surface of the spacer and in the vicinity of the side surface is wider than the width of the vent hole between the through hole of the spacer and the vicinity of the side surface of the spacer. Seating detection switch. The seating detection switch according to claim 4,
A seating detection switch characterized in that a notch or a through hole is provided in a portion of the film-like base material corresponding to the vent hole formed in the side surface of the spacer and in the vicinity of the side surface. . In the seating detection switch according to any one of claims 1 to 5,
A seating detection switch, wherein a waterproof ventilation sheet is provided so as to cover an opening of the ventilation hole formed in the outer shape of the seating detection switch.

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