JPH0733141Y2 - Temperature sensor mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a mounting structure for a temperature sensor.

(Prior Art) An example of a conventional structure is shown in FIG.

In FIG. 5, 1 is a hollow cylindrical temperature detecting member, 2 is a temperature sensor such as a thermistor installed at the inner tip of the temperature detecting member 1, 3 is a lead wire connected to the temperature sensor 2,
Reference numeral 4 denotes a cup-shaped holder embedded inside the structure 5.

When the temperature sensor 2 is attached, first, a blind hole 6 having a predetermined depth is formed in the structure 5, and the holder 4 is opened in the blind hole 6 so that the inlet 4a thereof is open to the outside of the structure 5. By fitting, the holder 4 is embedded inside the structure 5. Next, a heat-sensitive agent 7 having a high thermal conductivity and a viscous property, such as silicon-based grease, is pushed from the inlet 4a of the holder 4 by using a rod-shaped jig (not shown) to load a predetermined amount on the inner bottom of the holder 4. After that, the temperature detecting member 1 is inserted into the holder 4 from its inlet 4a, and its tip surface 1a is brought into contact with the inner bottom surface 4b of the holder 4. Thus, since the heat-sensitive agent 7 fills the tip of the gap 8 between the outer peripheral surface of the temperature detecting member 1 and the inner peripheral surface of the holder 6, the temperature at the temperature detecting point in the deep portion of the structure 5 is the holder 4, It is transmitted to the temperature sensor 2 via the heat sensitive agent 7 and the temperature detecting member 1.

(Problems to be Solved by the Invention) In the above conventional mounting structure, the temperature detection point is the structure 5
When it is in the deep part, the length of the holder 4 becomes long,
Not only was it troublesome to push the viscous heat-sensitive agent 7 into the inner bottom portion of the holder 4, but it was not possible to load the heat-sensitive agent 7 in a state where it contained no bubbles.

Therefore, if air bubbles are present in the heat-sensitive agent 7 in the play 8 with the temperature detecting agent 1 attached, the response of the temperature detection becomes poor, or the temperature cannot be detected accurately. there were.

(Means for Solving the Problems) The present invention has been proposed to solve the above problems, and the gist of the present invention is that a heat-sensitive agent is provided at the tip of a temperature detection member in which a temperature sensor is incorporated. A temperature sensor characterized by forming a recess for accommodating and projecting a convex portion that fits in the recess on an inner bottom surface of a holder that is embedded in the temperature detection member and into which the temperature detection member is inserted. It is in the mounting structure.

(Operation) Since the present invention has the above configuration, when the temperature detecting member is inserted into the holder, the convex portion is fitted into the concave portion,
The heat-sensitive agent contained in the recess is pushed out of the recess and fills the tip of the play between the outer peripheral surface of the temperature detecting member and the inner peripheral surface of the holder.

(Embodiment) One embodiment of the present invention is shown in FIGS. 1 and 2.

A concave portion 10 having a predetermined capacity is formed on the tip surface of the temperature detecting member 1, and a convex portion 11 which can be fitted in the concave portion 10 is provided on the inner bottom surface 4b of the holder 4 so as to project toward the inlet 4a. .

Other configurations are similar to those of the conventional one shown in FIG. 5, and corresponding members are designated by the same reference numerals.

Then, when the temperature sensor 2 is attached, first, before the temperature detection member 1 is fitted into the holder 4, the recess is first formed.
10 is filled with the heat sensitive agent 7. In this case, even the viscous heat-sensitive agent 7 can be easily filled without mixing air bubbles. Then, the temperature detecting member 1 is inserted into the holder 4 and the tip thereof is brought into contact with the bottom surface 4b of the holder 4.
Then, the convex portion 11 is fitted in the recess 10 and the heat-sensitive agent 7 in the recess 10 is pushed out to the outside thereof, and the air in the clearance 8 is directed from the tip of the temperature detecting member 1 toward the inlet 4a. While discharging, it is loaded into the tip of the play 8 without containing bubbles.

Thus, the temperature at the temperature detection point inside the object to be detected 5 such as a structure is transmitted to the temperature sensor 2 via the holder 4, the heat sensitive agent 7 containing no bubbles, and the temperature detection member 1.

It should be noted that, as shown in FIG. 3, the tip end surface of the convex portion 11 can be brought into contact with the bottom surface of the recessed portion 10, and as shown in FIG. You can also do it.

Further, although not shown, a plurality of convex portions 11 can be provided, and the cross section thereof can have an arbitrary shape such as a circle or a polygon.

(Effects of the Invention) In the present invention, a recess for accommodating a heat-sensitive agent is formed at the tip of a temperature detecting member having a temperature sensor incorporated therein, and the temperature detecting member is embedded and inserted into the temperature detecting member. Since the protrusion that fits in the above recess is provided on the inner bottom surface of the holder, when the temperature detecting member is inserted into the holder, the protrusion fits in the recess, and the heat sensitive agent stored in the recess is removed. It is pushed out of the recess and fills the tip portion in the play between the outer peripheral surface of the temperature detecting member and the inner peripheral surface of the holder.

Thus, the heat-sensitive agent containing no bubbles can be easily and quickly loaded into the free end of the play space, and the temperature of the test temperature can be accurately detected with high responsiveness. Further, since the heat sensitive agent can be easily filled in the recess without mixing air bubbles, the temperature sensor can be attached easily and quickly.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 shows a state before the temperature detecting member is inserted into the holder, and FIG. 2 shows a state in which the temperature detecting member is inserted into the holder. FIG. 3 is a vertical cross-sectional view showing each of FIG. 3 and 4 are partial vertical cross-sectional views showing modified examples of the convex portion. FIG. 5 is a vertical sectional view showing a conventional structure. Temperature sensor ... 2, temperature detection member ... 1, recess ... 10,
Heat-sensitive agent ... 7, temperature-sensitive body ... 5, holder ... 4, convex part ...
… 11

Claims (1)

[Scope of utility model registration request] 1. A temperature detecting member having a temperature sensor incorporated therein is provided with a recess for accommodating a heat-sensitive agent at the tip thereof, and is embedded in the inside of a temperature-measuring object, and on the inner bottom surface of a holder into which the temperature detecting member is inserted. A mounting structure for a temperature sensor, characterized in that a convex portion that fits in the recess is provided in a protruding manner.