JPS5822110Y2 - temperature detector - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a temperature detector using a temperature sensing element.

Conventionally, in this type of temperature detector, the temperature detection part and the instrument for displaying and reading the detected temperature are separated into separate bodies.
It was common for these two to be electrically connected by lead wires.

There are some products that have the above-mentioned temperature detection part and instrument integrated into one, making it easier to handle and operate in actual use. If the length becomes inconvenient or the easily damaged detection part is damaged, the entire detector becomes unusable, which is uneconomical.
Alternatively, it has disadvantages such as the inconvenience that the entire device becomes unusable while a portion of the device is being repaired.

Therefore, the present invention provides a temperature sensor that can avoid the above-mentioned deficiencies, in which the temperature detection part and the instrument part are integrated into one body through a removable structure, and the temperature detection part is housed in the temperature detection part. The temperature sensing element is held in a sealed structure that blocks it from outside air, temperature, moisture, harmful gases, etc.

The main idea will be explained below with reference to the figures.

As shown in the figure, the tip of an elongated hollow metal protection tube 1 is sharpened and closed, and a temperature sensing element 2 is inserted inside the tube.

Two lead wires 3 extending from the temperature sensing element 2 are soldered to an electrode plate 4 on the right side of the figure.

The electrode plate 4 has terminals made of a conductive material bonded to both surfaces of a substrate made of an insulating material in the form of a film, and the lead wire 3 described above is soldered to this.

As shown in FIG. 2, even if the electrode plate 4 is electrically contacted by being sandwiched between two contact pieces 5 from both sides, that is, both contact pieces are inserted through the middle part as shown in FIG. It is bent in a square shape and has elasticity, and its root portion is fixed to the additional plate 6, and the electrode plate 4 is elastically sandwiched from both sides with each end.

Both contact pieces 5 are electrically connected to meters 1 to 1, which are not shown.

γ is the body that houses the instrument.

Incidentally, the root portion of the protective tube 1 is integrally fixed to a hollow holder 8.

The inner circumferential surface of the holder 8 has locking portions 9 on both sides of the electrode plate 40 (first
A short groove or crevice 10 is formed into which the slit (FIG.) fits tightly.

The electrode plate 4 is positioned and assembled into the holder 8 by fitting its locking parts 9, 9 into the grooves 10, and then the holder 8 is filled with a synthetic resin adhesive 20. The holder and electrode plate are firmly glued together and the inside of the protection tube is sealed.

Therefore, in this assembly, after adhesion, from the holder 8 to the electrode plate 4,
It is a one-piece structure with part of it exposed.

Before filling the holder 8 with adhesive and sealing it, the inside of the protective tube 1 is filled with silicone oil, alumina, magnesia, etc. as a heat medium, and the inside of the protective tube is sealed with a wall 11.

The reed break 3 penetrates this wall 11.

The structure for attaching the second holder 8 to the main body 7 will be described below.

The base 12 for installation has a hollow tubular shape, and is integrally connected to the main body 7 by firmly fitting the annular rib 13 at its root into the fitting groove on the inner circumferential surface of the wall of the main body 7, as shown in the figure. .

The holder 8 can be slid into and removed from the cap 12.

A thread 14 is formed on the outer circumferential surface of the base 12, into which the internal thread of the cap 15 is screwed.

The holder 8 has a cone surface 16 on its outer peripheral surface.

The interior of the cap 15 has an engaging surface 11 that cooperates with this cone surface 16.

The inner peripheral surface of the cap 12 has an annular step 18 on which the right end of the holder 8 is received.

The cap 15 has a hole 19 that penetrates the protective tube 1 .

Next, the manner in which the protective tube 1, its holder 8, and the electrode plate 4 are attached to and detached from the main body 7 as one body will be described below.

From the state shown in the figure, turn the cap 15 to remove it from the screw of the base 12. When the cap 15 is removed, the protective tube 1 and the holder 8 are removed.
, the electrode plate 4 can be separated and removed from the main body 7 as an integral part.

To attach the protection tube 1 to the main body, attach the cap 15 to the main body 1.
In the removed state, the holder 8 is inserted into the inside of the base 12 while being inserted between both contact pieces 5 of the electrode plate 4 protruding from the end of the holder 8.

Thereafter, when the internal thread of the cap 15 is screwed into the screw 14 on the outer periphery of the cap 12 and tightened, the protective tube and holder 8 are firmly tightened to the main body I.

At that time, by engaging the retaining surface 17 of the cap 15 with the cone surface 16 of the holder 8, the holder 8 can be moved both in its length direction and in the direction orthogonal to the length direction. Tightened to prevent loosening and movement.

At the time of gathering, the right end of the holder 8 is connected to the stepped part 1 of the base 12.
8 and can receive longitudinal tightening force.

In the temperature detector assembled as described above, the detection part and the meter are integrated, so in actual use, hold the main body 7 in your hand and hold the temperature sensor at the tip of the protective tube 1. Insert the inside of the object and read the temperature displayed on the meter.

It is simple and easy to handle and operate, and
Even if either the detection part or the instrument falls down, it can be easily put back into use by immediately replacing the failed part.

The overall length of the shaft can also be relatively short.

Since the holder 8 is filled with a synthetic resin adhesive and sealed, it is possible to prevent moisture, moisture, harmful gases, etc. from entering the protective tube 1, and to safely protect the temperature sensing element 2.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of the proposed temperature sensor, and Figure 2 is a cross-sectional view of the temperature sensor according to the present invention.
FIG. 3 is a partial vertical cross-sectional view of the same with a 0' deviation. 1... Protection tube, 2... Temperature sensing element, 3.
...Lead wire, 4...Electrode plate, 5...
...Contact piece, 7...Meter rate L 8...
・Holter.

Claims (1)

[Scope of utility model registration request] A thin hollow protection tube 1, a temperature sensing element 2 with a lead wire 3 housed in one sealed and closed end of the protection tube, and an electrode plate 4 electrically connected to the lead wire 3 at the other end of the protection tube.
, a detection portion 22 consisting of a holder 8 that wraps the electrode plate 4 from its outer periphery and is fixed to the other end of the protective tube 1, and is sealed with an adhesive 20 filled inside and bonded integrally to the electrode plate; A contact piece 5 that can be electrically contacted and detached from the electrode plate 4, a main body 7 that houses therein a meter that is electrically connected to the contact piece 5, and an annular shape that screws the holder 8 onto the main body 7. A temperature sensor comprising a cap 15.