JPH0411306Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an opening/closing detection switch for detecting the opening/closing of an opening/closing body such as an automobile bonnet, and particularly relates to a waterproof mechanism for the switch portion.

(Prior Art) A bonnet switch is an example of an opening/closing detection switch for a vehicle opening/closing body. This bonnet switch detects the open/closed state of the vehicle bonnet, and is configured to sound an alarm or the like when the bonnet is opened while the vehicle is in a locked state. Conventionally, in this type of open/close detection switch, a switch part is disposed inside a switch case, and a thin lid body closes an open part of the switch case via an O-ring to make the switch part waterproof.

(Problem that the invention aims to solve) However, in the case of the waterproof mechanism that interposes an O-ring between the switch case and the lid body as described above, the switch part is inside the case, so the lead wires cannot be covered with the lid. There is a problem in that the waterproof and dustproof structure becomes complicated, as it is necessary to fit the grommet into a hole drilled in the body or case, and to pull out the lead wire from the insertion hole of the grommet.

(Means for Solving the Problems) The purpose of the present invention is to solve the above-mentioned problems, and as a means for that purpose, the bottom plate of the switch case is inserted through the bottom plate of the switch case to pivotally support the rotation shaft, and the outer rotation The base end of the actuating lever is fixed to the moving shaft, and a magnet holder in which a magnet is embedded is fixed to the inner rotating shaft. a second cavity into which a board is fitted, an O-ring is interposed between the rotation shaft and the switch case, the first cavity is sealed by a switch board, and a back surface of the switch board is provided. A reed switch operated by the magnet is sealed with resin and disposed in a recess provided in the recess, and the second cavity is closed with a lid.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking a bonnet switch as an example.

Figure 1 is a sectional view taken along line I-I in Figure 4, and Figure 2 is a cross-sectional view of Figure 4.
Figure 3 is a rear view of the bonnet switch, Figure 4 is a front view of the bonnet switch, and Figure 5 is a bottom view of the bonnet switch.
The figure is an exploded perspective view when the switch board is attached to the switch case of the bonnet switch, and FIG. 6 is a rear view of the switch board.

In the figure, A indicates a bonnet switch, and 1 indicates a switch case. The switch case 1 is provided with an insertion hole 1b in its bottom plate 1a, and a rotation shaft 2 is pivotally supported in the insertion hole 1b. and,
The base end of an operating lever 3 is fixed to the outer rotating shaft 2a of the rotating shaft 2, and one end of a magnet holder 5 in which a magnet 4 is embedded is fixed to the inner rotating shaft 2b. Here, a circumferential groove 2d is formed in the rotation shaft 2 at a portion existing in the insertion hole 1b, and a waterproof O-ring 9 is fitted into the circumferential groove 2d. This prevents water from entering the switch case 1 through the insertion hole 1b. A first cavity 1d in which the magnetic holder 5 can swing is formed in the switch case 1, and a second cavity 1e with a stepped surface 1c is formed above the first cavity 1d. is formed. Here, a circumferential groove 1f is formed in the stepped surface 1c. and,
After locking the seal ring 10 in the circumferential groove 1f,
The switch board 6 is connected to the periphery of the case wall 1c.
By fitting the switch board 6 into the second space 1e while being placed on the switch board 6, the first space 1d is sealed by the switch board 6. As a result, the second empty space 1e
Water is prevented from entering the first cavity 1d from the side. A recess 6a is provided on the back side of the switch board 6, and a reed switch 7 is disposed in the recess 6a, and the reed switch 7 is sealed with epoxy resin. Further, a lid 11 is attached to the upper surface of the switch case 1, and both ends of the lid 11 are provided to prevent pebbles and the like from directly hitting the operating lever 3 of the bonnet switch A while the vehicle is running. A protective piece 11a for protecting the coupler and a coupler support piece 11b for supporting the coupler are provided, respectively. A lead wire 12 connected to the reed switch 7 is drawn out from the side surface of the lid 11. As described above, since the reed switch 7 is sealed with epoxy resin, the terminals of the reed switch 7 will not be shunted even if the lead wire 12 is not provided with a special waterproof structure. When the reed switch 7 and the magnet 4 are opened, the pressure between the pressure plate of the bonnet and the operating lever 3 is released, so that they face each other, and when the reed switch 7 and the magnet 4 are closed, the pressure plate of the bonnet and the operating lever 3 are aligned. One end of the coiled spring 8 wound around the rotating shaft 2 is locked in the groove 2c provided on the rotating shaft 2, and the other end is held in place so that the reed switch 7 and the magnet 4 are separated by contact. A locking groove 6 provided in the bearing hole 6b of the switch board 6
c, and a clockwise rotational force of the rotation shaft 2 in FIG. 5 is applied to the coiled spring 8.

As a result, when the bonnet is opened, the reed switch 7 and the magnet 4 face each other, and the reed switch is turned off.
It becomes ON state. Further, when the bonnet is closed, the actuating lever 3 rotates against the coiled spring 8 due to contact with the pressing plate, and the reed switch 7 and the magnet 4 are separated, and the reed switch 7 is turned off.

(Effects of the invention) The present invention has the above configuration, so that
There is an O between the rotation axis of the operating lever and the switch case.
The first cavity, which is sealed by the ring and in which the magnetic holder can swing, is sealed by the switch board, and the second cavity, into which the switch board is fitted, is closed by the lid, so that there is no space inside the switch case. Water, dust, etc. do not enter, and in particular, the waterproof effect prevents the return spring attached to the rotating shaft of the operating lever from rusting and causing return failure. It has a good effect. Furthermore, since the reed switch is encapsulated with resin, there is an excellent effect that the terminals of the reed switch will not be shot, even if no special waterproof structure is provided for the lead wire extraction portion.

[Brief explanation of the drawing]

Figure 1 is a sectional view taken along line I-I in Figure 4, and Figure 2 is a cross-sectional view of Figure 4.
Fig. 3 is a rear view of the bonnet switch, Fig. 4 is a front view of the bonnet switch, and Fig. 5 is a bottom view of the bonnet switch.
The figure is an exploded perspective view when the switch board is attached to the switch case of the bonnet switch, and FIG. 6 is a rear view of the switch board. 1...Switch case, 1d...1st empty space, 1
e...Second cavity, 1f...Peripheral groove, 2...Rotation axis,
2a...outer rotation axis, 2b...inner rotation axis, 3...
...Actuation lever, 4...Magnet, 5...Magnet holder, 6...Switch board, 6a...Recess, 7...
... Reed switch, 8... Winding spring.

Claims (1)

[Scope of utility model registration request] An actuating lever is formed on the outside of the switch case and protrudes toward the opening/closing body, and is applied with a return force so that it is pushed into contact with the vehicle opening/closing body in the closed position of the vehicle opening/closing body and returns to its original position in the open position. In the opening/closing detection switch of the vehicle opening/closing body that detects the opening/closing of the
A rotating shaft is supported by penetrating the bottom plate of the switch case, and the base end of the operating lever is attached to the outer rotating shaft.
A magnet holder in which a magnet is embedded is fixed to the inner rotating shaft, and a first cavity in which the magnet holder can swing and a second cavity in which a switch board is fitted are provided in the switch case. , an O-ring is interposed between the rotation shaft and the switch case, the first space is sealed by a switch board, and the recess provided on the back of the switch board is actuated by the magnet. 1. An opening/closing detection switch for a vehicle opening/closing body, characterized in that a reed switch is disposed in a resin-sealed state, and the second space is closed by a lid.