JP3554535B2 - Pressure detector - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pressure detector.
[0002]
[Prior art]
2. Description of the Related Art There has been known a pressure detector in which an introduction port communicating with the port of a pressure detector main body having a port communicating with a built-in pressure sensor is covered and locked, and the port and the introduction port are relatively rotatable. ing. In this type of pressure detector, even when the introduction port is connected to an undesired direction with respect to the pressure pipe to be detected, since the port can be rotated with respect to the introduction port, there are few restrictions on the direction of the port, For example, when an output signal code from a pressure sensor is distributed from a pressure detector body provided with a port, there is little restriction on the direction of the code, which is beneficial to the user.
[0003]
[Problems to be solved by the invention]
However, large-diameter steps are formed corresponding to the outer periphery of the port and the inner periphery of the introduction port, and a large-diameter O-ring made of an elastic body is pressed between the corresponding steps in the radial direction and in the direction perpendicular thereto. It is noted that there is a problem to be solved such that the rotation torque when rotating the port with respect to the introduction port is very large, and the operation of rotating the port becomes troublesome. Should. An object of the present invention is to provide a pressure detector capable of reducing the relative rotation torque between a port and an introduction port in view of the problems to be solved.
[0004]
[Means for Solving the Problems]
It is as shown in the claims.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described. However, it is an exemplary embodiment adopted based on the present invention, and the present invention should not be interpreted in a limited manner based on matters specific to the embodiment. Instead, the technical scope of the present invention should be determined based on the matters stated in the claims and matters substantially equivalent to the matters.
[0006]
In the illustrated embodiment, an inlet port 4 communicating with the port 2 of a pressure detector main body 3 having a port 2 communicating with a built-in pressure sensor 1 is covered and locked, and the port 2 and the inlet port 4 are relatively positioned. A pressure detector which is rotatable in a horizontal direction, wherein small-diameter and large-diameter steps 5, 6, 7, 8 are respectively formed on the outer periphery of the port 2 and the inner periphery of the introduction port 4, Small-diameter and large-diameter O-rings 9 and 10 made of an elastic material such as rubber are interposed between the corresponding step portions 5-7 and 6-8, respectively. The O-ring 10 is a pressure detector pressed in a direction perpendicular to the radial direction.
[0007]
More specifically, the outer shell of the pressure detector main body 3 is formed by connecting a pair of resin cases 11 and 12 to each other by appropriate means, and a pressure sensor 1 is mounted on a substrate 13 held therein by appropriate means. Is installed. The distal end of the pressure sensor 1 having a small diameter is inserted into a hole 14 on the base end side of the port 2 formed integrally with one of the cases 11, and a space between the outer periphery of the distal end and the hole 14 is formed by an O-ring 15. Hermetically sealed. Further, an output signal code 16 from the pressure sensor 1 is connected to the substrate 13, and the code 16 is disposed outside while being sandwiched between the pair of cases 11 and 12.
[0008]
The introduction port 4 is made of metal, and has a threaded portion 17 formed on the outer periphery of the distal end, and is screw-coupled to a pressure pipe (not shown) to be detected. When the screw connection is made, the outer periphery (hexagonal nut-shaped portion) of the base of the introduction port 4 is rotated by a spanner or the like. The rotation is easily performed because the annular convex edge 18 formed on the inner periphery of the proximal end of the introduction port 4 is merely engaged with the convex edge 19 formed on the outer periphery of the port 2 so as to be engaged with each other. Even when the introduction port 4 is rotated, the pressure detector main body 3 does not easily rotate together.
[0009]
In this pressure detector, the center holes 20 and 21 of the port 2 and the introduction port 4 are aligned with the center line of the pressure sensor 1, and the fluid pressure in the pressure pipe (not shown) coupled to the introduction port 4 is applied to the center hole 21. , 20 by the pressure sensor 1. A connector 22 is connected to an end of the cord 16.
[0010]
According to this embodiment, the small-diameter O-ring 9 is located at the small-diameter step portion 5 of the port 2 and the small-diameter step portion 7 of the introduction port 4 to maintain airtightness therebetween. The turning torque when turning the introduction port 4 can be reduced. The O-ring 10 is located at the large-diameter step portion 6 of the port 2 and the large-diameter step portion 8 of the introduction port 4. It is clear that the tilt (rattle) can be effectively prevented.
[Brief description of the drawings]
FIG. 1 is a sectional view, FIG. 2 is a perspective view, and FIG. 3 is an exploded perspective view.
Reference Signs List 1 pressure sensor 2 port 3 pressure detector main body 4 introduction port 5, 7 small-diameter step 6, 8 large-diameter step 9 small-diameter O-ring 10 large-diameter O-ring

Claims (1)

A pressure detector having a port communicating with a built-in pressure sensor, and covering and locking an introduction port communicating with the port of the pressure detector main body, the port and the introduction port being relatively rotatable. A small-diameter and a large-diameter step portion are respectively formed on the outer periphery of the port and the inner periphery of the introduction port, and a small-diameter and a large-diameter O-ring made of an elastic body are interposed between the corresponding step portions, respectively. A pressure detector in which the small-diameter O-ring is pressed in the radial direction and the large-diameter O-ring is pressed in the direction perpendicular to the radial direction.

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