JPH06102383B2 - Thermal print head - Google Patents
Thermal print headInfo
- Publication number
- JPH06102383B2 JPH06102383B2 JP61025546A JP2554686A JPH06102383B2 JP H06102383 B2 JPH06102383 B2 JP H06102383B2 JP 61025546 A JP61025546 A JP 61025546A JP 2554686 A JP2554686 A JP 2554686A JP H06102383 B2 JPH06102383 B2 JP H06102383B2
- Authority
- JP
- Japan
- Prior art keywords
- heat generating
- heat
- leads
- area
- paper
- 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 - Lifetime
Links
- 239000010410 layer Substances 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 4
- 239000011241 protective layer Substances 0.000 claims description 3
- 230000020169 heat generation Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/345—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads characterised by the arrangement of resistors or conductors
Landscapes
- Electronic Switches (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明はサーマルプリントヘッドに関する。TECHNICAL FIELD The present invention relates to a thermal print head.
（従来の技術） 従来のこの種サーマルプリントヘッドは、第３図に示す
ように基板１の表面に、これより突出するようにグレー
ズ層２を設け、その表面に抵抗層３を形成してから、グ
レーズ層２の頂部の両側に間隔Ａを隔ててリード４、５
を形成し、更に両リード４、５を含む全表面を保護膜６
によって覆うようにして構成されている。(Prior Art) In a conventional thermal print head of this type, as shown in FIG. 3, a glaze layer 2 is provided on a surface of a substrate 1 so as to project therefrom, and a resistance layer 3 is formed on the surface. , Leads 4 and 5 on both sides of the top of the glaze layer 2 with a space A therebetween.
Forming a protective film 6 on the entire surface including both leads 4 and 5.
It is configured to be covered by.
リード４、５間に電圧を印加すれば、リード４、５間に
存在する抵抗層部分が発熱領域3Aとなってここが発熱す
る。したがってグレーズ層２の頂部に相対する保護膜部
分に感熱紙などの用紙を押し付けることによって、所要
のプリントが可能となる。When a voltage is applied between the leads 4 and 5, the resistance layer portion existing between the leads 4 and 5 becomes a heat generation region 3A and heat is generated here. Therefore, by pressing a paper such as thermal paper against the protective film portion facing the top of the glaze layer 2, desired printing can be performed.
ところでこのような構成では、前記したようにグレーズ
層２を突出して形成し、その表面に抵抗膜３を設けてか
らその頂部を残してその両側にリード４、５を形成する
ようにしているので、発熱領域3Aとその両側にあるリー
ド３、４との間に段差が生じる。そのためその表面に形
成される保護膜６も、発熱領域3Aに相対する部分がくぼ
むため、ここにくぼみ部７が生じるようになる。By the way, in such a configuration, as described above, the glaze layer 2 is formed so as to project, and the resistance film 3 is provided on the surface thereof, and then the leads 4 and 5 are formed on both sides of the resistance film 3 leaving the top. A step is formed between the heat generating area 3A and the leads 3 and 4 on both sides thereof. As a result, the protective film 6 formed on the surface of the protective film 6 is recessed at the portion facing the heat generating area 3A, so that the recessed portion 7 is formed here.
このような状態でプリントしたとすると、用紙と保護膜
６の頂部との間に空間が生じるため、用紙との当りが悪
くなり、発熱領域3Aから用紙への熱の伝導の効率が低下
する。これによってプリント濃度が低下したりするの
で、これを回避するために供給電力を増大するなり、用
紙を強く発熱領域3Aに押し付けるなどの処置が必要とな
る。If printing is performed in such a state, a space is created between the paper and the top of the protective film 6, so that the contact with the paper is deteriorated and the efficiency of heat conduction from the heat generating area 3A to the paper is reduced. As a result, the print density is reduced, and in order to avoid this, the power supply is increased, and it is necessary to take measures such as strongly pressing the paper against the heat generating area 3A.
（発明が解決しようとする問題点） この発明は発熱領域の頂部に相対する保護膜のくぼみの
存在により、発熱領域と用紙との当りが損なわれるのを
改善することを目的とする。(Problems to be Solved by the Invention) An object of the present invention is to prevent the contact between the heat generating area and the sheet from being damaged due to the presence of the depression of the protective film facing the top of the heat generating area.
（問題点を解決するための手段） この発明は基板の表面にグレーズ層を突出して形成し、
その表面に抵抗膜を設けてからその頂部を残してその両
側にプリントに必要な発熱領域とその両側に隣接するよ
うに拡張領域とを隔ててリードを形成し、前記発熱領域
よりも拡張領域の抵抗値を低くしてなることを特徴とす
る。(Means for Solving Problems) The present invention forms a glaze layer on the surface of a substrate in a protruding manner,
After providing a resistance film on the surface, leaving the top portion thereof, a lead is formed on both sides of the heating area required for printing and an extension area so as to be adjacent to both sides of the heating area. It is characterized by having a low resistance value.
（実施例） この発明の実施例を第１図、第２図によって説明する。
なお第３図と同じ符号を付した部分は同一または対応す
る部分を示す。この発明にしたがいリード4,5間を、発
熱領域3Aを形成するための間隔Ａと、これにその両側に
間隔Ｂだけ拡張させた拡張領域８とを合せた間隔とす
る。そしてこの発熱領域3A、拡張領域８に電流が流れる
とき、発熱領域3Aよりも拡張領域の方が抵抗値が低くな
るようにする。(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 and 2.
In addition, the same reference numerals as those in FIG. 3 indicate the same or corresponding portions. According to the present invention, the space between the leads 4 and 5 is a space in which the space A for forming the heat generation region 3A and the expansion region 8 expanded on both sides thereof by the space B are combined. When a current flows through the heat generating area 3A and the extension area 8, the resistance value of the extension area is set to be lower than that of the heat generating area 3A.
そのためにはたとえば発熱領域3A内での電流路が千鳥状
となるようにする。具体的には発熱領域3Aの両側面から
反対側の側面に到達しない程度のスリット９を交互に形
成するようにすれば、前記電流路を千鳥状とすることが
できる。For that purpose, for example, the current paths in the heat generating region 3A are made to be staggered. Specifically, the current paths can be made staggered by alternately forming the slits 9 that do not reach the opposite side surface from both side surfaces of the heat generating area 3A.
以上のような構成によると、リード4,5間に電流が流れ
たとき、その電流は一方の拡張領域８から発熱領域3Aに
流れ、ここから他方の拡張領域８を経て流れるようにな
る。その場合拡張領域８は、電流の流れに対して直交す
る方向が幅となり、その幅Ｍはリード4,5と同じ幅であ
る。しかし発熱領域3Aでは電流は各スリット間９を千鳥
状に流れるので、その流れに対して直交する方向が幅と
なり、その幅ｍは前記した幅Ｍより充分に狭くなる。ま
た電流の流れる方向に沿う距離は、電流路が千鳥状であ
る発熱領域3Aの方が長い。According to the above configuration, when a current flows between the leads 4 and 5, the current flows from the one expansion area 8 to the heat generating area 3A, and then from the other expansion area 8 to the heating area 3A. In this case, the expansion region 8 has a width in the direction orthogonal to the current flow, and its width M is the same as that of the leads 4 and 5. However, in the heat generating region 3A, the current flows in a zigzag manner between the slits 9, so the width is in the direction orthogonal to the flow, and the width m is sufficiently narrower than the width M described above. In addition, the distance along the direction of current flow is longer in the heat generating region 3A in which the current paths are staggered.
そのためリード4,5間の抵抗膜３の膜厚が均一であると
すれば、リード4,5間に流れる電流に対しては、発熱領
域3Aの方が拡張領域８よりも抵抗値は遥かに高い。した
がって前記幅ｍを適当に選択すれば、発熱領域3Aではプ
リントに必要な温度にまで発熱させることができるとと
もに、拡張領域８では用紙を発色させるに足る温度にま
で発熱させないようにすることができるようになる。Therefore, if the film thickness of the resistance film 3 between the leads 4 and 5 is uniform, the resistance value in the heat generation region 3A is far greater than that in the expansion region 8 with respect to the current flowing between the leads 4 and 5. high. Therefore, if the width m is appropriately selected, it is possible to generate heat up to the temperature required for printing in the heat generation area 3A, and to prevent heat generation in the expansion area 8 to a temperature sufficient for color development. Like
すなわち従来とは同程度の面積範囲にわたって発熱させ
ることができるとともに、拡張領域８を設けてもここの
発熱量は極めて僅かであるから、電力の無駄な消費をと
もなうことはない。That is, it is possible to generate heat over the same area range as in the conventional case, and even if the extended region 8 is provided, the amount of heat generated here is extremely small, so that waste of power is not consumed.
一方保護層６の表面におけるくぼみ部７は拡張領域８の
分に対応しただけ従来のものよりも広くなる。したがっ
てこの表面に用紙が接触するとき、従来構成のものより
も用紙の保護層６に対する接触面積は広くなり、それだ
け従来よりも用紙の当りが改善されるようになる。On the other hand, the recessed portion 7 on the surface of the protective layer 6 is wider than that of the conventional one by the amount corresponding to the extension region 8. Therefore, when the paper comes into contact with this surface, the contact area of the paper with respect to the protective layer 6 becomes larger than that of the conventional structure, and thus the contact of the paper is improved as compared with the conventional case.
（発明の効果） 以上詳述したようにこの発明によれば、発熱領域に相対
する保護膜の表面部分のくぼみ部を広くするようにした
ので、用紙への当りを簡単に改善することができるとと
もに、そのために発熱領域に隣接して拡張領域を設けて
も、拡張領域の抵抗値を発熱領域のそれよりも小さくす
るようにしているので、無駄な電力が消費されるような
ことがないといった効果を奏する。(Effect of the Invention) As described in detail above, according to the present invention, since the recessed portion of the surface portion of the protective film facing the heat generating area is widened, it is possible to easily improve the contact with the paper. At the same time, even if an expansion region is provided adjacent to the heat generation region, the resistance value of the expansion region is made smaller than that of the heat generation region, so that wasteful power is not consumed. Produce an effect.
第１図はこの発明の実施例を示す断面図、第２図は要部
の平面図、第３図は従来例の断面図である。 １…基板、２…グレーズ層、３…抵抗膜、3A…発熱領
域、4,5…リード、６…保護膜、７…くぼみ部、８…拡
張領域、FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a plan view of an essential part, and FIG. 3 is a sectional view of a conventional example. DESCRIPTION OF SYMBOLS 1 ... Substrate, 2 ... Glaze layer, 3 ... Resistive film, 3A ... Heating area, 4,5 ... Lead, 6 ... Protective film, 7 ... Recessed portion, 8 ... Expansion area,
Claims (1)
し、その表面に抵抗膜を設けてからその頂部を残してそ
の両側にリードを設け、更にその表面に保護膜を設けて
なるサーマルプリントヘッドにおいて、前記両リード間
の抵抗膜に、プリントに必要な発熱領域と、前記保護層
の表面に生ずる前記発熱領域のみに相対するくぼみ部よ
りも広いくぼみ部が生ずるように、前記発熱領域の両側
に隣接して拡張領域を設け、前記発熱領域を、用紙の発
色に必要な温度まで発熱させることができる抵抗値と
し、前記拡張領域を、用紙の発色に足る温度まで発熱し
ない抵抗値としてなるサーマルプリントヘッド。1. A thermal print wherein a glaze layer is formed on the surface of a substrate so as to project, a resistive film is provided on the surface, leads are provided on both sides of the resistive film, leaving the top portion thereof, and a protective film is further provided on the surface. In the head, a heat generating area necessary for printing and a recessed portion wider than the recessed portion corresponding to only the heat generating area generated on the surface of the protective layer are formed in the resistance film between the leads so that the heat generating area is formed. Expansion regions are provided adjacent to both sides, and the heat generating region has a resistance value capable of generating heat to a temperature required for color development of the paper, and the expansion region has a resistance value not generating heat to a temperature sufficient for color development of the paper. Thermal print head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61025546A JPH06102383B2 (en) | 1986-02-06 | 1986-02-06 | Thermal print head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61025546A JPH06102383B2 (en) | 1986-02-06 | 1986-02-06 | Thermal print head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62183353A JPS62183353A (en) | 1987-08-11 |
| JPH06102383B2 true JPH06102383B2 (en) | 1994-12-14 |
Family
ID=12168975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61025546A Expired - Lifetime JPH06102383B2 (en) | 1986-02-06 | 1986-02-06 | Thermal print head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06102383B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6078450U (en) * | 1983-11-04 | 1985-05-31 | セイコーインスツルメンツ株式会社 | thermal head |
| JPS61164856A (en) * | 1985-01-18 | 1986-07-25 | Ricoh Co Ltd | Recording head and half tone recording method using the same |
-
1986
- 1986-02-06 JP JP61025546A patent/JPH06102383B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62183353A (en) | 1987-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3057813B2 (en) | Thermal head and method of manufacturing the same | |
| JPH06102383B2 (en) | Thermal print head | |
| US4037315A (en) | Thermal printing head | |
| JP2001113738A (en) | Thick film thermal head | |
| JPS61211058A (en) | Thermal printing head | |
| JPH0661949B2 (en) | Thermal print head | |
| JP3413887B2 (en) | Heating body and method of manufacturing the same | |
| JP2508922B2 (en) | Thermal head | |
| JPH0539892Y2 (en) | ||
| JPS6016355B2 (en) | Thin film thermal head | |
| JPS58211469A (en) | Thermal head and preparation thereof | |
| JPH03254954A (en) | Structure of thermal head | |
| JP3099431B2 (en) | Thermal head | |
| JP2582397B2 (en) | Thin-film thermal head | |
| JPS633972A (en) | Preparation of thermal head | |
| JPS61192566A (en) | Thermal printing head for gradation recording | |
| JPS62187051A (en) | Thermal head | |
| JP2554556B2 (en) | Thermal print head | |
| JPS59229369A (en) | Thermal printing head | |
| JPS60129273A (en) | thermal recording head | |
| JP2584332Y2 (en) | Thermal print head | |
| JPS62207658A (en) | Thermal head | |
| JPH0768818A (en) | Thermal head | |
| JPH0640063A (en) | Thermal printing head | |
| JPH05330113A (en) | Thermal head |