JPH028772Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an improvement of a last line widget type thermal head.

[Prior art]

In recent years, in order to make the recording status on thermal recording paper due to the heat generated by the heat-generating resistor visible immediately after recording, a heat-generating resistor is formed near the peripheral edge of the substrate, and one end and the other end of the heat-generating resistor are formed. There is a tendency for last line widget type thermal heads to be used, in which the selector leads and common leads from the
58-1578) has now been disclosed.

However, due to the arrangement of the heating resistor and the way the lead wires are pulled out, the conventional type
-1578, in order to insulate and process the intersections of lead wires, a three-layer structure must be used, resulting in disadvantages such as complicating the manufacturing process and increasing costs.

[Summary of the idea]

The present invention aims to eliminate such drawbacks of the conventional devices at once, and provides a thermal head of the last line widget type which is equipped with a plurality of blocks including a plurality of heat generating resistor means, and which addresses the above-mentioned blocks. a selector lead-out tape carrier having a selector relay conductor connected to each lead-out selector lead from one end of the heating resistor means, and guiding the selector relay conductor to a selector terminal while insulating the selector relay conductor from other leads; A common lead tape carrier having a mutual relay conductor connected to each lead-out common lead from the other end of each heating resistor means, and insulating the mutual relay conductor from other leads and guiding it to each common lead in an adjacent block. and a selector drawer tape carrier and the common lead tape carrier are arranged side by side across the connecting portion between the selector relay conductor and each derived selector lead and the connecting portion between the mutual relay conductor and each derived common lead. By doing so, the purpose is achieved by a two-layer structure using single-layer wiring and a tape carrier on the board, and also the connection between the selector relay conductor and each output selector lead, and the connection between the mutual relay conductor and each output common lead. The present invention provides a highly effective thermal head in which connections can be made all at once in a row.

〔Example〕

Hereinafter, details of the present invention will be explained with reference to figures showing embodiments.

FIG. 1 is a circuit diagram in which a plurality of blocks B 1 _and B 2 each consisting of a pair of heating resistors (hereinafter referred to as resistors) R ₁ a, R ₁ b to R ₃₂ a, R _{32 b} are formed. The upper sides of the resistors R ₁ a, R ₁ b to R ₃₂ a, R ₃₂ b are commonly connected for each pair, and the resistors R ₁ a to
On the lower side of R ₃₂ a, common leads Ld ₁ to Ld ₃₂ connect blocks B ₁ and B ₂ of the same order, thereby forming a common circuit.
While the resistors R _{1 b} to R 32 b are individually led out to the driver terminals D 1 to D ₃₂ , the lower sides of the resistors R _{1 b} to R _{32 b} are connected to each block B ₁ ,
After common connection for each B ₂ , selector terminal S ₁ ,
It is being pulled out to S ₂ .

Therefore, if the blocks B ₁ and B ₂ are selected by applying a negative voltage to the selector terminals S ₁ and S ₂ and the application status of positive voltage to the driver terminals D ₁ to _{D 32} is selected, the resistor R ₁ a, R ₁ b〜R ₃₂ a,
The current-carrying element in R ₃₂ b is determined, and by this,
It becomes possible to perform desired recording.

FIG. 2 is a plan view of the substrate surface corresponding to FIG. 1, in which resistors R ₁ a, R ₁ b ~
R ₃₂ a and R ₃₂ b are formed, and correspondingly, a common conductor 3 and lead-out conductors 4 a, 4 b are formed respectively, and from the lead-out conductor 4 a, common leads Ld ₁ to Ld 1 are formed.
The Ld ₃₂ are individually drawn out and extend in the same direction as the peripheral end 2 at the intersection regions 5a and 5b indicated by chain lines, and also protrude to the gap between the intersection region 5b of the adjacent block _B0 .

However, common lead Ld ₂ of block B ₁ and
Ld ₃₂ is further extended downward and is individually led out to driver terminals D ₂ and D ₃₂ formed near the other peripheral end 6 facing the peripheral end 2, and is connected to a different terminal for each block. The terminals are individually drawn out to the driver terminals.

In addition, the selector lead Ls ₁ from the lead-out conductor 4b
~ _Ls32 extends parallel to and in the same manner as the common leads _Ld1 ~ _Ld32 , but protrudes to the gap between the crossing areas 5a and 5b in its own block _B1 .

Figure 3 is a plan view after completion, Figure 4 A and B are the 3rd floor plan.
These are AA and BB sectional views in the figure, in which tape carriers 8a and 8b with conductors formed between reinforcing and insulating insulating films 7a to 7c are placed on intersection areas 5a and 5b, and the selector drawer is pulled out. Tape carrier 8b for common lead of tape carrier 8a for
Selector relay conductors Lsd ₁ to Lsd ₃₂ with one end protruding toward the side and bent and the other end protruding downward are marked with selector leads Ls ₁ to _{Ls 32} at the spacing between the tape carriers 8a and 8b. They are connected to each other by the _bonding shown in _{FIG .}
The common conductor L _sc of the tape carrier 9 is used to connect the other terminals of the tape carrier 9 to the other terminals of the tape carrier 9 by bonding.

Furthermore, mutual relay conductors Lc ₁ to _{Lc 32} that are linear and protrude toward both sides of the tape carrier 8b are connected to common leads Ld ₁ to Ld ₃₂ on both sides by bonding to form a common circuit.

Therefore, each lead Ld ₁ to Ld ₃₂ , Ls ₁ to _{Ls 32} and the driver terminal D ₁ by the printed wiring on the board 1
~D ₃₂ , selector terminals S ₁ , S _{2 ,} etc., and tape carriers 8 a, 8 b, and 9 have a two-layer structure,
The desired thermal head can be obtained, the configuration is simplified, the connection part is straight, and the bonding connection between the selector relay conductor L _sd and the selector lead L _s and the mutual relay conductor are simplified.
Since the bonding connection between L _c and the common lead L _d can be performed in one row, it can be easily and inexpensively manufactured.

In addition, FIG. 5 is a wiring diagram showing the connection situation according to FIGS. 3 and 4, where the solid line is the wiring on the board 1, the dotted line is the connection by the tape carriers 8a and 8b, and the ■ mark is the bonding between them. It shows
The same electrical connections as in FIG. 1 are realized.

In addition, the number of resistors R ₁ a to R ₃₂ b and the block
The numbers of B ₁ and B ₂ may be determined depending on the conditions, and the same applies even if the respective parts are connected not by bonding but by other means, and various modifications are possible.

[Effect of idea]

As is clear from the above explanation, according to the present invention, the purpose can be achieved with a simple two-layer structure, and the connection between the selector relay conductor and each derived selector lead, and the connection between the mutual relay conductor and each derived common lead are arranged in a line. Since the process can be performed in parallel, the manufacturing process can be simplified and the cost can be reduced, making it possible to obtain great effects as a thermal head for various uses.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention, and FIG. 1 is a circuit diagram;
Figure 2 is a plan view of the board surface corresponding to Figure 1;
The figure is a plan view after completion using the board in Figure 2, and Figure 4.
The figures are AA and BB sectional views in Figure 3,
FIG. 5 is a wiring diagram of the connection situation according to FIGS. 3 and 4. R ₁ a, R ₁ b to R ₃₂ a, R ₃₂ b...Resistor (heating resistor), Ld ₁ to Ld ₃₂ ... Common lead, Ls ₁ to _{Ls 32} ...
Selector lead, Lsd ₁ to Lsd ₃₂ ... Selector relay conductor, Lc ₁ to _{Lc 32} ... Mutual relay conductor, D ₁ to _{D 32} ...
...Drive terminal, S ₁ , S ₂ ...Selector terminal, 1...
... Board, 5a, 5b... Intersection area, 8a... Tape carrier for selector drawer, 8b... Tape carrier for common lead.

Claims (1)

[Scope of utility model registration request] In a last line widget type thermal head comprising a plurality of heat generating resistor means as one block, a selector connected to each lead-out selector lead from one end of the heat generating resistor means in the block. A selector lead-out tape carrier having a relay conductor and leading the selector relay conductor to the selector terminal while insulating it from other leads, and connected to each lead-out common lead from the other end of each heating resistor means in the block. a common lead tape carrier which insulates the mutual relay conductor from other leads and leads it to each common lead in an adjacent block; A thermal head in which the selector drawer tape carrier and the common lead tape carrier are arranged side by side, sandwiching a connecting portion between the mutual relay conductor and each common lead.