JPS6110193Y2 - - Google Patents
Info
- Publication number
- JPS6110193Y2 JPS6110193Y2 JP17848380U JP17848380U JPS6110193Y2 JP S6110193 Y2 JPS6110193 Y2 JP S6110193Y2 JP 17848380 U JP17848380 U JP 17848380U JP 17848380 U JP17848380 U JP 17848380U JP S6110193 Y2 JPS6110193 Y2 JP S6110193Y2
- Authority
- JP
- Japan
- Prior art keywords
- metal case
- water temperature
- thermistor element
- lead wire
- meter unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000002184 metal Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 7
- 239000000463 material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Description
【考案の詳細な説明】
本考案は、測定すべき水中に直接浸水させて水
温を測定する水温計ユニツトの構造に関するもの
で、円筒臼状のサーミスタ素子と金属ケースとの
凹凸を用いて素子を固定することを特徴とする。[Detailed description of the invention] This invention relates to the structure of a water temperature meter unit that measures water temperature by directly immersing it in the water to be measured. It is characterized by being fixed.
従来の水温計ユニツトは、第１図に示すように
上下に電極を設けた円板状のサーミスタ素子１を
中をくり抜いた金属ケース２の内面底部にその一
端を半田付けして設置し、素子１の他端から半田
付けによりリード線３を取出し、金属ケース２の
開口部を絶縁性樹脂４で封口したものが一般的で
ある。このユニツトは主に自動車のラジエーター
内の測温に用いられているが、構造上耐振性に一
抹の不安がある。 As shown in Fig. 1, a conventional water temperature meter unit has a disc-shaped thermistor element 1 with electrodes provided on the top and bottom, and one end of the thermistor element 1 is soldered to the bottom of the inner surface of a hollowed-out metal case 2. Generally, the lead wire 3 is taken out from the other end of the metal case 2 by soldering, and the opening of the metal case 2 is sealed with an insulating resin 4. This unit is mainly used to measure the temperature inside automobile radiators, but due to its structure, there are some concerns about its vibration resistance.
本考案は、この問題に対処して、従来からの汎
用サーミスタ材料を使用でき、しかもサーミスタ
素子と金属ケースとを一体化することにより、耐
振性に優れた水温計ユニツトを提供しようとする
ものである。 The present invention addresses this problem by providing a water temperature meter unit that can use conventional general-purpose thermistor materials and has excellent vibration resistance by integrating the thermistor element and metal case. be.
次に、本考案を実施例で第２図〜第４図ととも
に説明する。公知のMn−Ni−Cr系組成でサーミ
スタ材料を造粒し、臼型金型を用いて成形後、
1250℃で２時間空気中にて焼成した。電極は、素
子へこみ内部全面および外側に取る。第２図はこ
の円筒臼状の負の温度係数を持つサーミスタ素子
５を示しており、サーミスタ素子６の内外面に電
極７が設けられている。このサーミスタ素子５の
寸法は外径５mmφ、高さ５mm、内径３mmφ、深さ
４mmである。一方、第３図に示すように金属ケー
ス８は例えば黄銅製で、その内面底部に径2.9mm
φ、高さ５mmの凸部９を残してくり抜いてある。
またケース８の外側上部にはラジエーター装着用
にネジ切りを施している。そして、第４図に示す
ようにこの金属ケース８の凸部９に素子５の凹部
を嵌め込み半田付けし、金属ケース８と導通させ
る。次に、素子５の他端と３mmφの金属製デイス
ク１０を付けたリード線１１を半田付けして該素
子５を押え込む構造とし、もう一方の端子として
金属ケース８外へリード線１１を取出す。上記金
属ケース８の開口部分は、従来通り絶縁樹脂１２
等で素子５側からのリード線１１を除いて封口し
た。この水温計ユニツトの抵抗値は、40±0.2℃
で600Ω、100±0.2℃で77.0Ωである。この水温
計ユニツトをJIS、D1601に従つて振動試験を行
つた結果、試験後の抵抗値変化率は厚み1.7mmの
デイスク型サーミスタ素子を用いた場合の±５％
に比べて±3.2％以内に向上した。さらに、厳し
い振動試験を実施した結果、デイスク型サーミス
タ素子では試験数50ケに対して10ケが金属ケース
スと素子接着部に、４ケが素子とリード線接着部
に断線を生じたが、本考案ユニツトでは同一試験
条件下でわずか２ケが素子とリード線接着部間で
断線しただけであつた。 Next, the present invention will be explained using examples with reference to FIGS. 2 to 4. After granulating the thermistor material with a known Mn-Ni-Cr composition and molding it using a mortar-type mold,
It was fired in air at 1250°C for 2 hours. Electrodes are placed on the entire inside of the element recess and on the outside. FIG. 2 shows this cylindrical mortar-shaped thermistor element 5 having a negative temperature coefficient, and electrodes 7 are provided on the inner and outer surfaces of the thermistor element 6. The thermistor element 5 has an outer diameter of 5 mmφ, a height of 5 mm, an inner diameter of 3 mmφ, and a depth of 4 mm. On the other hand, as shown in Fig. 3, the metal case 8 is made of brass, for example, and has a diameter of 2.9 mm at the bottom of its inner surface.
It is hollowed out leaving a convex portion 9 with a diameter of φ and a height of 5 mm.
Additionally, the outer upper part of the case 8 is threaded for mounting a radiator. Then, as shown in FIG. 4, the concave portion of the element 5 is fitted into the convex portion 9 of the metal case 8 and soldered to make the convex portion 9 conductive to the metal case 8. Next, a lead wire 11 with a metal disk 10 of 3 mm diameter is soldered to the other end of the element 5 to hold down the element 5, and the lead wire 11 is taken out of the metal case 8 as the other terminal. . The opening of the metal case 8 is made of insulating resin 12 as before.
The lead wire 11 from the element 5 side was removed and sealed. The resistance value of this water temperature meter unit is 40±0.2℃
600Ω at temperature, 77.0Ω at 100±0.2℃. As a result of vibration testing of this water temperature meter unit in accordance with JIS and D1601, the rate of change in resistance value after the test was ±5% compared to when using a 1.7 mm thick disk type thermistor element.
The improvement was within ±3.2% compared to . Furthermore, as a result of conducting severe vibration tests, out of 50 disk-type thermistor elements tested, 10 had disconnections at the bond between the metal case and the element, and 4 had disconnections at the bond between the element and the lead wire. In the devised unit, only two disconnections occurred between the element and the lead wire bond under the same test conditions.
以上のように、本考案水温計ユニツトは自動車
等の苛酷な振動モードに対しての耐振性に優れ、
部品寿命を延ばし産業上の意味は大きい。 As mentioned above, the water temperature meter unit of the present invention has excellent vibration resistance against severe vibration modes of automobiles, etc.
It extends the life of parts and has great industrial significance.
第１図は従来の水温計ユニツトの断面図、第２
図および第３図はそれぞれ本考案ユニツトを構成
する円筒臼状サーミスタ素子と金属ケースの断面
図、第４図は本考案に係る水温計ユニツトの一実
施例を示す断面図である。
５……円筒臼状のサーミスタ素子、８……金属
ケース、９……凸部、１１……リード線。
Figure 1 is a cross-sectional view of a conventional water temperature meter unit;
3 and 3 are sectional views of a cylindrical mortar-shaped thermistor element and a metal case constituting the unit of the present invention, respectively, and FIG. 4 is a sectional view showing an embodiment of the water temperature meter unit of the present invention. 5... Cylindrical mortar-shaped thermistor element, 8... Metal case, 9... Convex portion, 11... Lead wire.
Claims (1)
が、その凹部を内面底部に凸部を持つ金属ケース
の該凸部に嵌合されて該ケースに入れられ、上記
サーミスタ素子の他端をリード線で押え込む構造
とした水温計ユニツト。 A cylindrical mortar-shaped thermistor element having a negative temperature coefficient is inserted into the case by fitting its concave part into the convex part of a metal case having a convex part on the bottom of the inner surface, and connects the other end of the thermistor element with a lead wire. The water temperature gauge unit has a structure that allows it to be held down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17848380U JPS6110193Y2 (en) | 1980-12-11 | 1980-12-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17848380U JPS6110193Y2 (en) | 1980-12-11 | 1980-12-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57101936U JPS57101936U (en) | 1982-06-23 |
| JPS6110193Y2 true JPS6110193Y2 (en) | 1986-04-02 |
Family
ID=29973317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17848380U Expired JPS6110193Y2 (en) | 1980-12-11 | 1980-12-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6110193Y2 (en) |
-
1980
- 1980-12-11 JP JP17848380U patent/JPS6110193Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57101936U (en) | 1982-06-23 |
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