JPH0688418B2 - Moving coil type print head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] Regarding the structure of a moving coil type print head used in an impact type wire dot printer, it is possible to improve workability and reliability by eliminating aerial wiring of a coil end portion. For the purpose of moving coil type printing, which has a printing pin and prints by moving the coil base with one side of the coil on one side and the connecting member on the other side for connecting the coil to the drive circuit. In the head, the other surface of the coil is attached to the one surface of a coil attachment member having two first terminal portions on one surface to connect each terminal portion of the coil to the terminal portion, and The member is provided with two second terminal portions exposed to the coil base side at positions corresponding to the first terminal portions, and An opening for connecting between the terminal portions is provided at a position facing each terminal portion, and the opening is used to make the first and second terminals.
The terminal part of is directly connected.

[Industrial application field]

The present invention relates to the structure of a moving coil type print head used in an impact type wire dot printer.

The impact type wire dot line printer apparatus is capable of printing Chinese characters and printing on a copy form, so that the market is expanding, and further speeding up is demanded accordingly. One of the means for fulfilling this demand is a moving coil system that can increase the number of pins to increase the speed.

[Conventional technology]

FIG. 5 is a partially exploded perspective view showing a structure of a conventional moving coil type print head, and FIG. 6 is a plan view showing a main part of FIG. 5, in which 1 is a plurality of coil bases 2 arranged in parallel. A moving coil portion, 3 is a magnet, 4 is a case, and 5 is a heat sink.

As shown in detail in FIG. 7, the coil base 2 is provided with a print pin 6 at its tip, and its base is fixed and supported by a resin 9 via a leaf spring 8 to a fixed portion 7 on the case 4 side. Also,
A coil 10 is attached to one surface of the coil base 2, and a connecting member (flexible printed board) 11 is attached to the other surface thereof. Each terminal portion of the coil 10 passes through an opening 12 formed in the coil base 2. It is connected to the terminal portion (copper foil portion) 13 of the connecting member 11. The terminal portion 13 is connected to a drive circuit (printed board) 14 by a vinyl covered wire 15.

The magnets 3 are arranged in parallel at equal intervals, and the coil base 2 is located between the adjacent magnets 3 and 3. The coil 10 and the magnet 3 provided on the coil base 2 form a linear motor.

The heat radiating plate 5 is integrally provided with a heat radiating fan 16, and is attached to the projecting portion 4a of the case 4 in contact with the end faces of the magnets 3. Reference numeral 17 denotes a rubber back stopper attached to the heat dissipation plate 5.

The moving coil portions 1 in each row are arranged such that the vertical relationship is reversed and the print pins 6 are arranged in a row.

Printing is performed by moving the print head along the platen 18 (see FIG. 6) and energizing the coil 10 of the predetermined coil base 2 at a predetermined time. By this energization and the magnetic field of the magnet 3, the coil base 2 is rotated in the counterclockwise direction in FIG. 7 while elastically deforming the leaf spring 8, and the print pin 6 is removed from the pin guide 19 provided on the case 4. It projects a certain amount. The protruding print pin 6 is attached to the paper 100 via the ribbon 101.
Is pressed against the platen 18, whereby printing is performed.
The energization of the coil 10 is stopped immediately before the printing is completed, and the printing pin 6 which has completed the printing returns to the original position together with the coil base 2 which is biased clockwise by the leaf spring 8 in FIG. The returned coil base 2 is back stopper 17
Locked in.

[Problems to be Solved by the Invention]

In the conventional structure as described above, the coil 10 to the connecting member 11
Up to the terminal portion 13 of is an aerial wiring, and when the coil base 2 and the coil 10 vibrate during the printing operation, a wire breakage often occurs at this portion.
I tried to keep the terminal from moving. However, this work is time-consuming and difficult to manage in a large amount. Also,
The wire material for the space wiring is also thin, so caution was required.

The present invention eliminates the aerial wiring of the coil end portion, and workability
An object of the present invention is to provide a moving coil type print head capable of improving reliability.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the present invention, by moving a coil base provided with a printing pin, one surface of the coil is attached, and the other surface is attached with a connecting member for connecting to the coil driving circuit. In a moving coil type print head for printing, the other side of the coil is attached to the one side of a coil attachment member having two first terminal portions on one side and each terminal portion of the coil is connected to the terminal portion. And the connection member is provided with two second terminal portions exposed to the coil base side at positions corresponding to the first terminal portions, and at positions facing the respective terminal portions of the coil base. An opening for connecting between the terminal portions is formed in the above, and the first and second terminal portions are directly connected using the opening.

[Action]

With such a structure, there is no aerial wiring in the coil end portion, and disconnection is prevented. Further, it is not necessary to draw around the coil wire, which improves workability and reliability.

The direct connection between the first and second terminal portions can be performed by spot soldering in which this portion is momentarily heated.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 is a structural explanatory view of a moving coil type print head according to the present invention (FIG. 1 (a) is an exploded perspective view showing the entire structure, and FIG. 1 (b) is a side view showing the main structure). . In the figure, 21 is a coil base, 22 is a coil mounting member (flexible printed board), 23 is a connecting member (flexible printed board), and these are integrated with the coil 10 to form a moving coil type print head. There is. Next, the procedure for assembling the print head will be described, supplementing the configuration of each member.

When assembling, first, as shown in FIG.
Is attached to the position of the chain line of the coil attachment member 22. Then, each terminal portion of the coil 10 is connected to the two first terminal portions (copper foil portions) 24, 25 formed on the coil mounting member 22 by spot soldering. FIG. 3 shows a state where this connection is completed. In this case, the lead wire and the pattern dimensions of the first terminal portions 24 and 25 are determined so that the length of the terminal portion becomes short. Next, as shown in FIG. 1 (a), the coil 10 with the coil base in the state of FIG.
And the connecting member 23 are attached. In this case, the connecting member
The second terminal portions (copper foil portions) 26, 27 formed corresponding to the first terminal portions 24, 25 are placed on the inner side of 23, and the connecting members 23 are attached so that the respective terminal portions face each other. In this state, the facing terminal portions 24, 26, and 25, 27 are located in the opening 28 formed in the coil base 21, and the spot solder of each facing terminal portion is utilized by using the opening 28. Then, the assembly of each member is completed. After this assembly is completed, the coil base 21
The leaf spring 8 at the base of is inserted and fixed in the fixing portion as in the conventional case.

The coil 10 is connected to the drive circuit by connecting terminal portions 29, 29 formed on the connecting member 23 by connecting the second terminal portions 26, 27.
Use 30.

With such a structure, there is no aerial wiring portion in the coil end portion (since the coil end portion is directly connected to the first terminal portions 24 and 25 of the coil attachment member 22), and disconnection due to vibration is prevented. Further, it is not necessary to draw around the coil wire, which improves workability and reliability.

FIG. 4 shows another example of connecting the coil to the vibration circuit. In this figure, the coil base 21 is not shown. In the case of this example, the connecting member 23 'including the second terminal portions 26, 27 is
Terminals 33 and 34 connected to the second terminal portions 26 and 27 through patterns 31 and 32 are integrally provided, and the terminals 33 and 34 are directly pushed into a drive circuit (not shown) to be connected. ing. That is, the vinyl coated wire is unnecessary.

The printing and returning operations of the coil base 21 having the printing pin 6 are performed in the same manner as in the conventional case.

〔The invention's effect〕

As described above, according to the present invention, since there is no aerial wiring portion in the coil end portion, disconnection can be prevented. In addition, there is no need to draw thin coil wire,
It is possible to improve workability and reliability.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a moving coil type print head according to an embodiment of the present invention (FIG. 1 (a) is an exploded perspective view showing the entire structure, and FIG. 1 (b) is a side view showing a main structure). Fig. 2 is a perspective view showing how to attach the coil and the coil mounting member, Fig. 3 is a perspective view showing how to connect the coil end portion, and Fig. 4 is another example of connecting the coil to the drive circuit. 5 is a perspective view showing the structure of a conventional moving coil type print head, FIG. 6 is a plan view showing the main part of FIG. 5, and FIG. 7 is a detailed view of the coil base of FIG. In the side view shown, 6 is a print pin, 10 is a coil, 14 is a drive circuit, 21 is a coil base, 22 is a coil mounting member, 23 and 23 'are connecting members, and 24 and 25 are first terminals. , 26 and 27 are second terminal portions, and 28 is an opening.

Claims (1)

[Claims] 1. A print pin (6) is provided, and one surface of a coil (10) is attached to one surface, and a connection member (23) for connecting the coil (10) to a drive circuit is attached to the other surface. In a moving coil type print head for performing printing by moving the coil base (21), a coil mounting member (2) having two first terminal portions (24, 25) on one surface of the other surface of the coil (10) 22) is attached to the one surface to connect the terminal portions of the coil (10) to the terminal portions (24, 25), and the connecting member (23) is provided with the first portion.
Two second terminal portions (26, 27) exposed to the coil base (21) side at positions corresponding to the terminal portions (24, 25) of the coil base (21), and the respective terminal portions of the coil base (21). An opening (28) for connecting terminal portions is formed at a position facing (24,25,26,27), and the first terminal portion (24,2) is formed using the opening (28).
A moving coil type print head characterized in that 5) and the second terminal portion (26, 27) are directly connected.