JPH0443787Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a thermopile.

TO-5 is used as the thermopile package. FIG. 1 is a cutaway perspective view showing a conventional structure, in which a heat sink 2 is provided inside the cylindrical container body 1.
is provided. 3 is an infrared transmitting window to which a multilayer infrared interference filter or a polyethylene film 4 is adhered. The multilayer infrared interference filter has both the function of selectively transmitting only infrared light in a specific wavelength range and the function of isolating the thermopile element from the external environment.

By the way, there are cases where the selection of infrared light is not necessary in actual use of the thermopile, and in such cases, a polyethylene film is used simply to isolate the thermopile element from the outside environment.

As described above, in any case, the conventional structure requires a heat sink and a window frame, and manufacturing and assembling the thermopile requires a troublesome and complicated work process, causing an increase in costs.

The present invention is an attempt to solve and eliminate such problems, namely, to simplify the structure by providing the package itself with the function of a heat sink at the same time.

An example of implementing the present invention will be described below based on the drawings. FIG. 2 is a partially cutaway perspective view, and FIG. 3 is a longitudinal sectional view thereof.

As seen in the drawing above, the thermopile 1 of the present invention
0 consists of a lower frame 10' and an upper frame 10'' of the same shape that is fitted above the lower frame, and the lower frame 10' is provided with a recessed chamber 11 inside the center. The surrounding outer peripheral surface is formed into an L-shaped key step 12, in which the vertical part is formed as an inclined wall 12a that descends inward at a constant angle, whereas the horizontal part 12b has an L-shaped key step 12. The electrode pins 13a and 13b are buried downward, and the head e is exposed to the horizontal portion 12b.

On the other hand, the upper frame 10'' is provided with a window 14 having substantially the same shape as the concave chamber 11 of the lower frame 10' in the center thereof, and the lower half of the outer circumferential side has the same shape to engage and come into contact with the inclined wall 12a. The bottom surface is formed in the horizontal part 15b.

However, in the present invention, the horizontal portion 12 of the lower frame 10'
The thermopile element 17 is placed on top b, and the upper frame 10'' is fitted from above so that the thermopile element 17 is clamped between both horizontal parts and integrally joined. 12a,1
Apply adhesive to 5a. In this case, the two inclined walls are extremely effective in accurately maintaining the positional accuracy of fitting, and the joining can be performed easily and quickly.

The thermopile element 17 is made by forming a required pattern on an organic film (Mylar film, etc.) with two or more types of thin films of metals with low melting points, such as Sb and Bi, and then sintering and fusion bonding them. The inner part forms a warm joint part, and the clamping part of the horizontal part forms a cold joint part.

In addition, the structure of the window 14 has a key section 18 at the upper part.
A multi-layer infrared interference filter may be attached as required. 19 is a resin mold.

The materials used in the production of this product include single metals, alloys, and resins, but in the case of resins, the surface is coated with a thin metal film to increase the infrared reflectance and thermoelectricity. It can also be used as an electrical shield, and can be easily molded and manufactured in large quantities at low cost.

In the present invention, the upper frame 10'' has the function of a cap and a heat sink, and the structure can be simplified compared to conventional products, making manufacturing and assembly easy and inexpensive.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view showing a conventional structure, FIG. 2 is a partially cutaway perspective view of the product of the present invention, and FIG. 3 is a longitudinal cross-sectional view of the same. 2...Heat sink, 3...Infrared transmission window,
10'...lower frame, 10''...upper frame, 11...concave chamber,
13a, 13b...electrode pin, 14...window, 17
...Thermopile element.

Claims (1)

[Scope of utility model registration request] Consisting of a lower frame and an upper frame, the lower frame has a concave chamber inside the center, and an L-shaped key step is formed on the circumferential side surrounding the concave chamber. A window having substantially the same shape as the recessed chamber of the frame is provided, and its lower surface is engaged with the L-shaped key so that the thermopile element is clamped between the two, and the clamping portion is provided with a window. A thermopile characterized by a configuration in which electrode pins are attached to the horizontal part of the key stage of the lower frame.