JP2936584B2 - Thermal head for heat pipe heat dissipation - Google Patents
Thermal head for heat pipe heat dissipationInfo
- Publication number
- JP2936584B2 JP2936584B2 JP17912989A JP17912989A JP2936584B2 JP 2936584 B2 JP2936584 B2 JP 2936584B2 JP 17912989 A JP17912989 A JP 17912989A JP 17912989 A JP17912989 A JP 17912989A JP 2936584 B2 JP2936584 B2 JP 2936584B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- thermal head
- heat pipe
- substrate
- temperature
- 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 - Fee Related
Links
Landscapes
- Electronic Switches (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明はプリンタに関し、特にプリンタのサーマル
ヘッドの構造に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer, and more particularly, to a structure of a thermal head of the printer.
プリンタのサーマルヘッドは第４図及び第５図に示す
ように、通常、櫛形断面を有する放熱フィン２に矩形の
板状基板１が接着された構造で、基板１にある発熱抵抗
体で発生した熱は放熱フィン２に伝わり大気中に放散さ
れて基板１は冷却される。本願の出願人が、本願の出願
前に提出した従来技術として、特願平１−78148号（特
開平２−258270号）、特願平１−101593号（特開平２−
281966号）、特願平１−128920号（特開平２−307759
号）がある。As shown in FIGS. 4 and 5, the thermal head of the printer usually has a structure in which a rectangular plate-shaped substrate 1 is bonded to a radiation fin 2 having a comb-shaped cross section. The heat is transmitted to the radiating fins 2 and dissipated into the atmosphere to cool the substrate 1. Prior arts filed by the applicant of the present application before the filing of the present application include Japanese Patent Application No. 1-78148 (Japanese Patent Application Laid-Open No. 2-258270) and Japanese Patent Application No. 1-110593 (Japanese Patent Application No.
281966), Japanese Patent Application No. 1-128920 (Japanese Patent Application Laid-Open No. 2-307759)
No.).
前記の発熱抵抗体が発熱を開始してからのサーマルヘ
ッド基板１の温度は第３図のａで示す曲線で表わされる
特性を示す。即ち温度は徐々に上昇して、極端な場合は
基板１がインクリボンの融点以上になったり、感熱紙の
感熱温度以上になると、発熱抵抗体に通電しなくとも印
字されて、プリンタとしての機能が失われる欠点があ
る。The temperature of the thermal head substrate 1 after the above-mentioned heating resistor starts generating heat shows a characteristic represented by a curve shown in FIG. That is, the temperature gradually rises. In an extreme case, when the temperature of the substrate 1 becomes equal to or higher than the melting point of the ink ribbon, or when the temperature becomes equal to or higher than the heat-sensitive temperature of the thermal paper, printing is performed without energizing the heat-generating resistor. Has the disadvantage of being lost.
本発明は第４図に示す放熱フィン２を第１図に示すヒ
ートパイプ４及び放熱フィン５に置き換えて上記の欠点
を解消した。The present invention has solved the above-mentioned disadvantage by replacing the heat radiation fin 2 shown in FIG. 4 with the heat pipe 4 and the heat radiation fin 5 shown in FIG.
箱状のヒートパイプ４の内部には第２図の断面図に示
すように作動液体６が封入されていて、基板内の発熱抵
抗体により基板１の温度は第３図に示すｂ曲線に沿て上
昇し、作動液体６の気化温度t0に達すると、作動液体６
は気化するが一方で、管状体5a内の加熱気体はフィン5b
で冷却されて再び液化するので温度t0は第３図に示すよ
うに一定に保持される。この作動液体６はインクリボン
の融点に合わせて適当な材料を選定する。A working liquid 6 is sealed in the inside of the box-shaped heat pipe 4 as shown in the sectional view of FIG. 2, and the temperature of the substrate 1 follows the curve b shown in FIG. And rises to reach the vaporization temperature t 0 of the working liquid 6.
Is vaporized, while the heated gas in the tubular body 5a is
The temperature t 0 is kept constant as shown in FIG. As the working liquid 6, an appropriate material is selected according to the melting point of the ink ribbon.
このヒートパイプ４に作動液体６が存在する限り基板
１から発生する熱を気化熱として吸収するため無限の熱
容量が存在するのと同じことになる。As long as the working liquid 6 exists in the heat pipe 4, the heat generated from the substrate 1 is absorbed as heat of vaporization, which is the same as having an infinite heat capacity.
第１図（Ａ），（Ｂ）及び第６図（Ａ）に示す本発明
によるヒートパイプ放熱のサーマルヘッドについて説明
すると、矩形の板状基板１の側面より大きい表面を有す
る矩形の図６（Ａ）に示すように、ヒートパイプ全体を
サーマルヘッド用材料で断面が矩形箱形になるように一
体成形する。作動液体６が封入されたヒートパイプ４の
長手方向には対称形に熱良導性の管状体5aが固定され、
管状体5aの固定端部と反対側の端部付近には複数個の板
状放熱フィン5bが並列して設けられている。管状体5aと
放熱フィン5bとで放熱フィン組立体を構成している。ま
たヒートパイプの長手方向又はこれと直角方向の任意の
組合せにより管状体5aと放熱フィン5bを取付けることも
できる。1 (A), (B) and FIG. 6 (A), the heat pipe for radiating heat pipes according to the present invention will be described. As shown in A), the entire heat pipe is integrally formed of a material for a thermal head so as to have a rectangular box-shaped cross section. A thermally conductive tubular body 5a is fixed symmetrically in the longitudinal direction of the heat pipe 4 in which the working liquid 6 is sealed,
A plurality of plate-shaped heat radiation fins 5b are provided in parallel near the end of the tubular body 5a opposite to the fixed end. The tubular body 5a and the radiation fins 5b constitute a radiation fin assembly. Further, the tubular body 5a and the radiation fins 5b can be attached in a longitudinal direction of the heat pipe or an arbitrary combination thereof in a direction perpendicular thereto.
一方、他の実施例として、サーマルヘッド全体をサー
マルヘッド用の金属材料で成形したヒートパイプとした
金属基板として形成しヒートパイプの底面がサーマルヘ
ッドの作用面となるようにすれば冷却効果は一層顕著に
なる。On the other hand, as another embodiment, if the entire thermal head is formed as a metal substrate in the form of a heat pipe formed of a metal material for a thermal head, and the bottom surface of the heat pipe becomes the working surface of the thermal head, the cooling effect is further enhanced. Become noticeable.
このためのヒートパイプの実際の製作方法としては、
ヒートパイプ全体を第６図（Ａ）に示すようにサーマル
ヘッド用材料で断面が矩形状になるように一体に形成し
てもよい。例えば、同種材料が金属材料とされるのが好
適である。The actual production method of the heat pipe for this is
As shown in FIG. 6 (A), the entire heat pipe may be integrally formed of a material for a thermal head so as to have a rectangular cross section. For example, it is preferable that the same material be a metal material.
上記のような構造のサーマルヘッドでは、定性的に第
３図のｂ曲線で表わされる温度特性を示すので、基板温
度が一定の気化温度t0に保持され、作動液体を選定する
ことにより温度制御が極めて容易になり、基板の熱は速
やかに除かれ、温度上昇が抑えられ、プリンタとして高
速化が可能になる。Since the thermal head having the above-described structure qualitatively exhibits the temperature characteristic represented by the curve b in FIG. 3, the substrate temperature is maintained at a constant vaporization temperature t 0, and the temperature control is performed by selecting the working liquid. Is extremely easy, the heat of the substrate is quickly removed, the temperature rise is suppressed, and the speed of the printer can be increased.
第１図（Ａ）と（Ｂ）は本発明によるヒートパイプ放熱
のサーマルヘッドの斜視図、 第２図は第１図のII−II断面図、 第３図はサーマルヘッドの温度特性図、 第４図は従来のサーマルヘッドの斜視図、 第５図は第４図のＶ−Ｖ断面図、 第６図（Ａ）と（Ｂ）は他の実施例の断面図である。 〔符号の説明〕 １……サーマルヘッド基板、２……放熱フィン、 ３……コネクタ、４……ヒートパイプ、 ５……放熱フィン組立体、5a……管状体、 5b……放熱フィン、６……作動液体。1 (A) and 1 (B) are perspective views of a thermal head for heat pipe heat radiation according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 4 is a perspective view of a conventional thermal head, FIG. 5 is a sectional view taken along line VV of FIG. 4, and FIGS. 6A and 6B are sectional views of another embodiment. [Explanation of Symbols] 1... Thermal head substrate 2... Heat radiating fin 3... Connector 4... Heat pipe 5... Heat radiating fin assembly 5 a Tubular body 5 b Heat fin 6 …… working fluid.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭58−112768（ＪＰ，Ａ) 特開 昭57−185169（ＪＰ，Ａ) 実開 昭61−175771（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) B41J 2/335 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-112768 (JP, A) JP-A-57-185169 (JP, A) Jpn. Field (Int.Cl. 6 , DB name) B41J 2/335
Claims (1)
と、ヒートパイプ（４）が同一材料で一体に形成され、
このヒートパイプ（４）の底面がサーマルヘッドの作用
面となるようにされたヒートパイプの一面と、前記ヒー
トパイプの長手方向又はヒートパイプに直角方向の何れ
か一方に一体に形成された少なくとも１個の管状体（5
a）に取り付けられた放熱フィン（5b）とを有し、前記
基板（１）の発生熱を前記管状体を介して放熱フィンか
ら放射することを特徴とするヒートパイプと一体に形成
されるヒートパイプ放熱のサーマルヘッド。1. A substrate for a thermal head of a printer (1).
And the heat pipe (4) are integrally formed of the same material,
One surface of the heat pipe having the bottom surface of the heat pipe (4) serving as a working surface of the thermal head and at least one surface integrally formed in one of a longitudinal direction of the heat pipe and a direction perpendicular to the heat pipe. Tubular bodies (5
a) heat radiation fins (5b) attached to the heat pipe, wherein the heat generated from the substrate (1) is radiated from the radiation fins through the tubular body. Thermal head for pipe heat dissipation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17912989A JP2936584B2 (en) | 1989-07-13 | 1989-07-13 | Thermal head for heat pipe heat dissipation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17912989A JP2936584B2 (en) | 1989-07-13 | 1989-07-13 | Thermal head for heat pipe heat dissipation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0345358A JPH0345358A (en) | 1991-02-26 |
| JP2936584B2 true JP2936584B2 (en) | 1999-08-23 |
Family
ID=16060497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17912989A Expired - Fee Related JP2936584B2 (en) | 1989-07-13 | 1989-07-13 | Thermal head for heat pipe heat dissipation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2936584B2 (en) |
-
1989
- 1989-07-13 JP JP17912989A patent/JP2936584B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0345358A (en) | 1991-02-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090611 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |