JP2778330B2 - Pressure sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure sensor, and more particularly, to a structure of a pressure sensor mounting portion for detecting a pressure in an internal combustion engine having an engine such as an automobile for controlling the engine or preventing pollution.

[0002]

2. Description of the Related Art Conventionally, this type of pressure sensor has been
No. 2-189635 or Japanese Utility Model Application Laid-Open No. 62-10413
No. 3 discloses this. The pressure sensor disclosed in the former publication was configured as shown in FIG.
In FIG. 6, reference numeral 1 denotes a pressure sensor main body, reference numeral 2 denotes a housing which is an outer shell of the pressure sensor main body 1, and reference numeral 3 denotes an L-shaped bracket for fixing the pressure sensor main body 1 in an appropriate place in, for example, an engine room of an automobile. ing.

In such a conventional pressure sensor, an L-shaped bracket 3 for mounting the pressure sensor main body 1 at an appropriate position in an engine room is mounted by inserting one end 3a of the bracket 3 into an insertion groove 4 formed in the housing 2. ing. A through-hole 5 is formed in the other end 3b of the bracket 3, and a screw is inserted into the through-hole 5, and the pressure sensor is fixed by screwing it to a mounting location.

The conventional pressure sensor disclosed in the latter publication is configured as shown in FIG. In the conventional pressure sensor shown in FIG. 7, flanges 8a and 8b for attachment to a housing 7 forming an outer shell of the pressure sensor main body 6.
Are formed integrally on both sides, and through holes 9 are formed in each of the flange portions 8a and 8b. In such a pressure sensor, a screw is inserted into the through hole 9 of each of the flange portions 8a and 8b, and is fixed by being screwed to a mounting position in the engine room.

[0005]

As described above, the conventional pressure sensor requires the bracket 3 and the flanges 8a and 8b to be attached to a predetermined position of an automobile or the like, and further requires the through holes 5 and 9 formed in these. Because the screw was inserted and fixed,
There is a problem that the mounting operation is troublesome, and there is a demand for a pressure sensor that can be easily mounted and that does not require the formation of a projecting portion for mounting on a housing or the like.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem, and the mounting can be easily performed without providing a mounting bracket or a flange portion and without using screws or the like. It is to provide a possible pressure sensor.

[0007]

The present invention SUMMARY OF] is above the pressure sensor comprising a locking member to the housing of the pressure sensor body with a built-in pressure sensing element therein, the fastener is from the root
A plate-like presser that expands in the direction
Shaft protruding from the center of the shaft, and in front of the tip of this shank
It consists of an elastically deformable locking portion that extends in the direction of the
Wherein the shaft portion and the locking portion form the pressure sensor main body.
The locking portion is inserted into the hole formed in the mounting plate to be mounted while undergoing elastic deformation, and the plate-shaped pressing portion is elastically deformed.
And the stopper comes into contact with the surface of the mounting plate, and the locking portion returns after the passage of the hole and abuts on the back surface of the mounting plate, and the plate-shaped pusher is pressed.
So that the mounting plate is sandwiched and locked between the locking portion and the locking portion.
Characterized in that the.

[0008]

According to the pressure sensor of the present invention, the locking portion of the locking member provided on the housing of the pressure sensor main body is forcibly pushed into the hole of the mounting plate. As a result, the locking portion passes through the hole while undergoing elastic deformation, and the plate-like pressing portion is attached to the mounting plate surface.
It is elastically deformed and abuts, and the locking part returns and spreads after passing through the hole, abuts on the back of the mounting plate, is prevented from coming out of the hole, and is attached by the plate-shaped holding part and the locking part.
The plate is clamped, and the locking tool itself is fixed to the mounting plate.
As a result, the pressure sensor main body is mounted on the mounting plate via the locking member.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a pressure sensor according to the present invention. 1 and 2 show a pressure sensor 10 according to one embodiment of the present invention. FIG. 1 is a side view of a pressure sensor 10 attached to a metal body panel 11 of an automobile, and FIG. 2 is a view of the pressure sensor 10 viewed from above with the body panel 11 partially cut away.

The pressure sensor 10 in this embodiment includes a pressure sensor main body 13 surrounded by a housing 12, in which a pressure sensing element (not shown) for converting a detected pressure into an electric signal, An amplifier section (not shown) for correcting and amplifying the signal of the sensing element to a desired characteristic is arranged, and outputs an obtained output signal through a connector (not shown) provided in the pressure sensor main body 13. .

The housing 12 of the pressure sensor 10 is formed of a synthetic resin, and a locking member 14 is integrally formed at an appropriate position on the outer surface. Therefore, the locking member 14 is also made of synthetic resin. As shown in FIGS. 1 and 2, the locking member 14 has a pair of plate-like pressing plates 14 a extending obliquely upward on opposite sides from a certain position as a center, and between the pair of pressing plates 14 a. A shaft plate 14b extending vertically upward from the center of the shaft plate, and a pair of locking plates 14c extending obliquely downward from the tip of the shaft plate 14b to the side where the above-mentioned holding plate 14a exists are integrally formed. Have been.

The pair of locking plate 14c and shaft plate 14b are shown in FIG.
When viewed from the side as in 1 , it has a shape like an anchor. An alignment dowel 14d is formed on one side of the shaft plate 14b so as to protrude therefrom. On the other hand, a circular hole 11a for press-fitting a pair of locking plates 14c of the locking tool 14 is formed at a desired position of the vehicle body panel 11 where the pressure sensor 10 is mounted. This hole 11a is
The diameter is smaller than the distance between the tips of the holding plates 14a, and the size is such that the locking plate 14c near the tip of the shaft plate 14b can pass, but the diameter is smaller than the distance between the ends of the locking plates 14c. Is formed. A part of the hole 11a has the notch 1 for passing the dowel 14d for positioning.
1b is formed.

When the pressure sensor 10 having such a locking member 14 formed integrally with the housing 12 is mounted on the vehicle body panel 11, a notch provided in a mounting hole 11a formed in the vehicle body panel 11 is provided. Dowel 1 of locking device 14 on 11b
4d and the locking plate 14c is pushed into the hole 11a. Since the locking plate 14c is made of synthetic resin, the distal end side is elastically deformed and narrows, and after passing through the hole 11a, returns to its original state, and each distal end abuts on one surface of the vehicle body panel 11. On the other hand, the holding plate 14a does not enter the hole 11a due to its size, but abuts against the other surface of the vehicle body panel 11 and is elastically deformed. Is securely and firmly fixed, so that the pressure sensor main body 13 is attached to the vehicle body panel 11 via the locking member 14.

As described above, the pressure sensor 10 of this embodiment
According to this, the pressure sensor is formed by a so-called one-touch snap operation in which the locking plate 14c of the locking member 14 formed integrally with the housing 12 of the pressure sensor body 13 is inserted into the hole 11a of the vehicle body panel 11 and locked. 10 to body panel 1
1 and can be fixed.

In the above-described embodiment, the locking member 14 is formed integrally with the housing 12 of the pressure sensor main body 13. However, only the locking member 14 is provided separately, and this is mounted on the housing 12 for use. You can also. Such an alternative embodiment is shown in FIGS.
The housing 12 has grooves 15a, 1 into which the edge of a base plate 14e formed below the holding plate of the locking member 14 is inserted.
A fitting attachment portion 15 is formed so as to oppose 5b. In addition, in FIG.
2 shows an engagement projection for fixing and holding the base plate 14e of the base plate 14e to the fitting attachment portion 15.

According to such a pressure sensor, the separate locking member 14 slides and mounts its base plate 14e to the fitting mounting portion 15 formed on the housing 12 of the pressure sensor main body 13, and Thereafter, it is attached to the vehicle body panel 11 in the same manner as in the embodiment shown in FIG.

[0017]

As described above, according to the pressure sensor of the present invention, the housing of the pressure sensor main body is provided with the locking member.
In the pressure sensor, the locking member is upwardly from the base.
A plate-like presser that can be expanded and elastically deformed,
A shaft protruding from the center and the plate-like shape from the tip of this shaft
It consists of an elastically deformable locking part that spreads in the direction of the holding part.
The shaft portion and the locking portion mount the pressure sensor main body.
The locking part is elastically deformed in the hole formed in the mounting plate
The plate-shaped presser is elastically deformed.
Abuts on the surface of the mounting plate, and after the locking portion passes through the hole,
And comes into contact with the back surface of the mounting plate,
And the locking portion so that the mounting plate is sandwiched and locked.
Therefore, it is very easy to fix it to a mounting plate such as a car body panel with a so- called one touch compared to conventional screwing, etc.
Therefore, mounting work in a narrow place becomes particularly easy. In addition, a plate-shaped presser that is elastically deformed and contacts the mounting plate
The mounting plate is sandwiched by the
Not only can the sensor body be securely fixed to the
This has the effect that the thickness of the attachment plate can be freely selected.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a pressure sensor according to one embodiment of the present invention is mounted on a vehicle body panel.

FIG. 2 is a plan view of the pressure sensor shown in FIG. 1 as viewed from above.

FIG. 3 is a perspective view showing a main part of a pressure sensor according to another embodiment of the present invention.

FIG. 4 is a front view showing a state where the pressure sensor shown in FIG. 3 is attached to a vehicle body panel.

FIG. 5 is a plan view of the pressure sensor shown in FIG. 4 as viewed from above.

FIG. 6 is a front view showing a conventional pressure sensor.

FIG. 7 is a cross-sectional view showing another example of a conventional pressure sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Pressure sensor 11 Body panel 11a Hole 12 Housing 13 Pressure sensor main body 14 Locking device 14a Holding plate 14b Shaft plate 14c Locking plate

Claims (1)

(57) [Claims] 1. A pressure sensor odor with a fastener to the housing of the pressure sensor body with a built-in pressure sensing element therein
The above-mentioned locking tool expands upward from the base and is elastically deformable
Plate-shaped holding part and a shaft protruding from the center of this plate-shaped holding part
Part, and spreads from the tip of this shaft part in the direction of the plate-shaped holding part.
An elastically deformable locking portion, wherein the shaft portion and the locking portion
The locking portion is inserted into a hole formed in the mounting plate on which the pressure sensor main body is mounted while undergoing elastic deformation, and the plate-shaped pressing portion is elastically deformed and comes into contact with the surface of the mounting plate.
And the locking portion returns after passing through the hole and abuts against the back surface of the mounting plate.
A pressure sensor characterized in that a catch plate is sandwiched and locked .