JP2508202Y2 - Raindrop sensor mounting structure - Google Patents

Description

[Detailed description of the device] [The purpose of the device]

(Industrial field of application) The present invention relates to a raindrop sensor mounting structure which is used when a raindrop sensor that senses the amount of rain depending on the intensity and frequency of raindrops and operates the wiper device accordingly is mounted on a vehicle body. is there. (Prior Art) Conventionally, as a mounting structure of a raindrop sensor as described above, for example, there is one shown in FIG. 4, and a raindrop sensor 101 shown in the drawing includes a case 102 including a head 102a and a case body 102b. The head 102a has a piezoelectric element (not shown) built therein, and the case body 102b has an amplifier, a protection element, a shield case, etc. not shown. The raindrop sensor 101 is provided on the head 102a of the case 102.
The bonnet hood 105 with the packing 103 interposed between the bonnet hood 105 and the head 102a with the hood 105a protruding outward from the hood 105 of the vehicle body.
The case main body 102b is fitted in the raindrop sensor mounting hole 105a provided in the front side of the case main body 102b.
The bonnet hood 10
I am trying to attach to 5. (Problems to be solved by the invention) However, in the above-described conventional raindrop sensor mounting structure, a pair of arms provided on the case body 102b is used.
The tips of 104 and 104 are locked in the raindrop sensor mounting holes 105a of the bonnet hood 105, respectively, and the case body
If the fitting dimensions of the 102b and the raindrop sensor mounting hole 105a vary, the case body 102b may come into contact with the peripheral portion of the raindrop sensor mounting hole 105a. There is a problem in that malfunction may occur due to direct transmission to the raindrop sensor 101 via the raindrop sensor 101. Further, if the raindrop sensor 101 is attached in a state where the packing 103 is displaced with respect to the raindrop sensor mounting hole 105a, the packing 103 protrudes from the head portion 102a of the raindrop sensor 101, which deteriorates the appearance. There is
Solving these problems has been a conventional problem. (Purpose of the Invention) The present invention has been made by paying attention to the above-mentioned conventional problems. It is possible to minimize the malfunction of the raindrop sensor due to the vibration of the vehicle body and to improve the appearance. It is an object of the present invention to provide a raindrop sensor mounting structure that does not damage.

[Constitution of device]

(Means for Solving the Problem) A raindrop sensor mounting structure according to the present invention has a sensor body fitting portion into which a sensor body of a raindrop sensor is fitted and is provided at a peripheral portion of a raindrop sensor mounting hole provided in a vehicle body. A pair of arm locking portions that oppose the sensor main body fitting portion of the packing having an annular groove to be fitted are provided, and the annular groove of the packing is fitted to the peripheral portion of the raindrop sensor mounting hole. The packing is mounted in the raindrop sensor mounting hole, the sensor main body of the raindrop sensor is fitted into the sensor main body fitting portion of the packing, and is provided opposite to the sensor main body side and separated from the outer surface of the sensor main body. It is characterized in that a pair of arms elastically biased in the direction are respectively locked to a pair of arm locking portions provided in the sensor body fitting portion of the packing. The structure of the sensor mounting structure is used as a means for solving the above-mentioned conventional problems. (Operation of the Invention) With the raindrop sensor mounting structure according to the present invention, when the raindrop sensor is mounted in the raindrop sensor mounting hole of the vehicle body,
The pair of arms provided on the sensor body side presses the packing against the raindrop sensor mounting hole by the repulsive force, so that the raindrop sensor is firmly fixed. At this time, since the pair of arms and the sensor body do not directly contact the peripheral portion of the raindrop sensor mounting hole, malfunction of the raindrop sensor due to vibration of the vehicle body is less likely to occur. Further, the packing is fitted in the raindrop sensor mounting hole in a predetermined state by fitting the annular groove into the peripheral edge portion of the raindrop sensor mounting hole. Therefore, when mounting the raindrop sensor, Since the packing does not shift with respect to the raindrop sensor, the appearance is maintained or improved. (Example) Hereinafter, this invention is demonstrated based on drawing. 1 to 3 show an embodiment of a raindrop sensor mounting structure according to the present invention. The raindrop sensor 1 shown in the figure comprises a sensor head 10 and a sensor body 20. The sensor head 10 has a substantially cap shape, and a piezoelectric element 12 integrally having a vibrating plate 11 that vibrates when raindrops collide is attached to the inside substantially at the center. On the other hand, the sensor body 20 includes a case 21 having a substantially rectangular tube shape,
A cover 22 for closing one opening (lower side in FIG. 1) of the case 21 is provided, and the sensor head 10 is fitted to an outward flange 21a formed in the other opening (upper side in FIG. 1) of the case 21. I am trying to match. This sensor body 20 is a case 21
Inside each of the upper and lower ends, a piezoelectric element side printed circuit board 2 connected to the piezoelectric element 12 via a lead wire 13 and a drive control system side printed circuit board 3 connected to a wiper drive control system (not shown) via a harness 23. An amplifier 4 for amplifying an electric signal obtained from the piezoelectric element 12 and outputting the amplified electric signal to the wiper drive control system is provided between these printed circuit boards 2 and 3, and the electric signal is protected from a disturbing current. An integrated circuit board 7 integrally provided with the protection elements 5 and 6 is provided, and a shield case 8 that protects the amplification section 4 and the protection elements 5 and 6 from disturbance is provided while covering the integrated circuit board 7. is there. Further, the cover 22 is fixed to the case 21 by locking projections 21b, 21b which are respectively fixed to the front and rear edges (left and right edges in FIG. 2) of one opening of the case 21.
As shown in FIG. 3, a pair of arms 22a, 22a provided to face each other is provided on both sides of 22 (on the left and right sides in FIG. 1). These arms 22a, 22a are provided in a state in which each tip side is positioned in the upper end direction of the case 21, and each tip side is elastically biased in a direction of separating from the outer surface of the case 21. The raindrop sensor 1 has a sensor head 10 in a raindrop sensor mounting hole 41 formed in a hood 40 of a vehicle body.
Is attached via the packing 30 in a state of protruding to the outside. In this case, the packing 30 includes a sensor body fitting portion 30a into which the sensor body 20 is fitted and an annular groove 30b that fits into the peripheral portion of the raindrop sensor mounting hole 41, and the sensor body fitting portion 30a includes , A pair of inward slopes 30c, 30c which are a pair of arm locking portions facing each other. This pair of inward slopes 3
Reference numerals 0c and 30c denote the sensor main body 20 and the sensor main body fitting portion 30a by bringing the open end of the sensor head 10 into contact with the upper end of the packing 30 in FIG.
Pair of arms 22a, 22 provided on the cover 22 when fitted to
The packing 30 is pressed against the peripheral edge portion of the raindrop sensor mounting hole 41 by locking the respective tips of a so that the raindrop sensor 1 can be mounted without rattling. When the raindrop sensor 1 is attached to the raindrop sensor mounting hole 41 of the hood 40, first, the annular groove 30b of the packing 30 is fitted to the peripheral edge portion of the raindrop sensor mounting hole 41, so that the packing 30 is attached to the raindrop sensor. Attach it to the mounting hole 41. At this time, the packing is positioned with respect to the raindrop sensor mounting hole 41 by the annular groove 30b. Then, the sensor body 20 of the raindrop sensor 1 is fitted into the sensor body fitting portion 30a of the packing 30. During this time, the pair of arms 22a, 22a of the cover 22 pass through the arm passage notch 30d continuously provided on the inward slope 30c of the sensor body fitting portion 30a while being pressed against the outer surface side of the case 21. When the open end of the sensor head 10 of the raindrop sensor 1 comes into contact with the upper end of the packing 30 in FIG. 1, the pair of arms 22a,
The tips of 22a are attached to the inward slopes 30c, 30 of the sensor body fitting portion 30a.
At the same time as being locked to c respectively, this pair of arms 22
The attachment of the raindrop sensor 1 is completed by pressing the packing 30 against the raindrop sensor attachment hole 41 by the repulsive force of the tips of a and 22a. Therefore, when the raindrop sensor 1 is mounted in the raindrop sensor mounting hole 41, all of the sensor head 10, the sensor body 20, and the pair of arms 22a, 22a are attached to the bonnet hood 4.
Since it does not touch 0 at all, from the hood 40,
Since the vibration is not directly transmitted to the raindrop sensor 1, the frequency of malfunction caused by this vibration is extremely low. The detailed structure of the raindrop sensor mounting structure according to the present invention is not limited to the above-described embodiment.

[Effect of device]

As described above, the raindrop sensor mounting structure according to the present invention has the sensor body fitting portion for fitting the sensor body of the raindrop sensor and is fitted to the peripheral portion of the raindrop sensor mounting hole provided in the vehicle body. A pair of arm locking portions facing each other to the sensor body fitting portion of the packing having an annular groove are provided, and the packing is attached with the annular groove of the packing fitted to the peripheral portion of the raindrop sensor mounting hole. The raindrop sensor is mounted in the mounting hole, the sensor body of the raindrop sensor is fitted into the sensor body fitting portion of the packing, and the sensor body is provided opposite to the sensor body in a direction away from the outer surface of the sensor body. Since the pair of elastically biased arms are respectively locked to the pair of arm locking portions provided on the sensor body fitting portion of the packing, malfunction of the raindrop sensor due to vibration of the vehicle body After which it is possible to significantly reduce the occurrence frequency, resulting in extremely excellent effect that does not reduce the appearance of the mounting state of the raindrop sensor.

[Brief description of drawings]

FIG. 1 and FIG. 2 are cross-sectional explanatory views from the front and side, respectively, showing one embodiment of a raindrop sensor mounting structure according to the present invention, and FIG. 3 is a raindrop sensor shown in FIG. And FIG. 4 is an exploded perspective view showing the positional relationship between the packing and the packing, and FIG. 4 is a cross-sectional view from the front side showing the conventional raindrop sensor mounting structure. DESCRIPTION OF SYMBOLS 1 ... Raindrop sensor, 20 ... Sensor body, 22a, 22a ... A pair of arms, 30 ... Packing, 30a ... Sensor body fitting part, 30b ... Annular groove, 30c, 30c ... A pair of inward slopes (a pair of arm locking parts) ), 40 ... Bonnet hood (car body), 41 ... Raindrop sensor mounting hole.

Claims (1)

(57) [Scope of utility model registration request] 1. A structure for mounting a raindrop sensor in a raindrop sensor mounting hole provided in a vehicle body, comprising a sensor body fitting portion for fitting a sensor body of the raindrop sensor, and at a peripheral portion of the raindrop sensor mounting hole. A pair of arm locking portions that oppose the sensor main body fitting portion of the packing having an annular groove to be fitted are provided, and the annular groove of the packing is fitted to the peripheral portion of the raindrop sensor mounting hole. While installing the packing in the raindrop sensor mounting hole,
The sensor main body of the raindrop sensor is fitted to the sensor main body fitting portion of the packing, and a pair of arms are provided facing each other on the sensor main body side and elastically biased in a direction of separating from the outer surface of the sensor main body. A raindrop sensor mounting structure characterized in that a pair of arm locking portions provided in a sensor body fitting portion of a packing are respectively locked.