JPH10181051A - Dot line printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a connector from coming off by a method wherein a cover having disengageably engaging anchoring parts is provided on a contact pin side, the connector inserting and extracting direction side of the connector, and the width direction sides, each of which is nearly normal to the inserting and extracting direction of a connector so as to hold contact pins and the connector with the cover. SOLUTION: This dot line printer is so constituted by holding contact pins 18 and a connector 19 with a cover 30 having disengageably engaging anchoring parts 31, 32 and 33 on a contact pin side, on the inserting and extracting direction side of the connector 19 and on the width direction sides, each of which is nearly normal to the inserting and extracting direction of the connector 19. Accordingly, the coming off of the connector 19 and the contact pins 18 can be prevented from occurring by means of the action of the cover 30. Further, on the connector 19 side of the cover 30, a flange 34 having an arbitrary length and width is provided. Due to the constitution as mentioned above, the cover 30 catches a connecting cable 20 bent under the state apart from the connector 19 by an arbitrarily determined distance, resulting in also serving as the cover of the connecting cable 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible printed circuit board (FPC) or a flexible flat cable (FFC) on which a connector is mounted.
The present invention relates to a dot line printer which reciprocates a hammerbank connected to a connection cable such as a line cable in a row direction and prints several dot lines simultaneously in the course of the reciprocation.

[0002]

2. Description of the Related Art Conventionally, in a hammer bank in which a print head having a plurality of print hammers arranged in a row direction with respect to a print sheet is reciprocated along a row direction by a shuttle mechanism, a release coil using an FPC or FFC is used. In order to supply the release current to the FFC or the FPC, the FFC or the FPC processed so that an end is exposed and a contact is formed.
A method of mounting a connector with a slide lock on the hammerbank to connect the ends of the cable with no insertion force method, or an FPC with a connector or an FFC with a connector
There is a method of connecting and connecting a contact pin on the hammerbank side.

In this case, the contact pins are arranged in a four-sided box structure or provided with walls on either the upper, lower, left, or right side, and the wall on one of the four or two sides is provided. There is a structure in which a projection or a hole is formed in the connector to fit into a hole or a projection provided on an arbitrary surface of the FPC or FFC connector to prevent the connector from coming off or to have a polarity.

In order to prevent erroneous insertion, there is a method in which the number of contacts of the cable connector is prepared to be larger than the number of contact pins to be connected, and pins serving as lids are embedded in extra contacts in advance to have polarity.

[0005]

In recent years, dot line printers have been reduced in size and weight, and as described above,
A method in which an FFC or FPC processed so that an end is exposed to be a contact and a connector with a slide lock for connecting the end of the FFC or FPC by a non-insertion force method are mounted on a hammerbank, or When connecting a cable to the hammerbank by installing contact pins on the hammerbank and connecting an FPC or FFC with a connector, the FFC or FPC immediately after connecting to the hammerbank is moved along with the hammerbank in a row direction by a shuttle mechanism. Because the cable reciprocates, it is necessary to bend the cable so that the cable does not break due to contact with other parts.
Because of his own rigidity, he needed to be further clamped.

Further, if the above-mentioned combination of a commercially available contact pin and a connector with a stopper is applied to a small board for bonding a wound bobbin and a fin for heat radiation by bonding, the fitting force is too strong and the hammer is too strong. There is a possibility that the small substrate adhered to the bank may be peeled off, or a pitch of the hammer pins arranged and arranged may be shifted.

The present invention facilitates access of a contact pin of a hammerbank and a connector of a cable for supplying a release current to the hammerbank, prevents disconnection of the connector, and also serves as a cover of the cable immediately after being connected to the hammerbank. It is an object of the present invention to improve the reliability of cable insertion / extraction and durability, and to obtain an inexpensive and highly reliable dot line printer.

[0008]

An object of the present invention is to provide a dot printing hammer provided at a predetermined pitch along a printing line, and a magnet for generating a magnetic attraction force for holding the dot printing hammer at a non-printing position. Means, a core for holding the dot printing hammer in a non-printing position, a bobbin disposed around the core, a winding wound around the bobbin, and a wire end of each of the windings being connected. And a small substrate on which contact pins are arranged, and a dot line in which a print hammer drive unit on which a print drive circuit is mounted and the contact pins are connected via a connection cable with a connector. In the printer,
On the contact pin side and the connector insertion / extraction direction side, and on the width direction side of the connector substantially perpendicular to the connector insertion / removal direction, a cover having a locking portion that is removably engaged is provided, and the contact pin and the connector are sandwiched by the cover. This is achieved by having a configuration.

[0009] The above object is achieved by forming a flange having an arbitrary length and width on the connector side on the cover.

[0010] The object of the present invention is to set the number n of contacts of the connector of the FPC to at least n = m + 1 with respect to the number m of contact pins as the connection unit, and to provide a projection on the cover, and This is achieved by adopting a configuration in which projections are fitted.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 are a side view and a plan view showing an example of the present invention. FIG. 3 is a perspective view of a cover showing an example of the present invention.

The hammer bank 10 includes a dot printing hammer 11 arranged at a predetermined pitch along a printing line, a magnet 12 for generating a magnetic attraction force for holding the dot printing hammer 11 at a non-printing position, and a dot printing hammer. A release electromagnetic coil for releasing the print hammer 11 from the non-print position is provided.

The release electromagnetic coil is a dot printing hammer 1
A winding 14 is wound around a bobbin 15 arranged around a core 13 for sucking and holding 1.
The leading end of the winding 14 is fused to the small substrate 17.

The number of windings of the release electromagnetic coil fused to the small substrate 17 is calculated by dividing the number of dot printing hammers 11 by 6 pins × 2 =
12 pins are used as one module unit.
The 12 release electromagnetic coils of one module unit are bonded to the small substrate 17.

The radiating fins 16 are bonded at positions over the release electromagnetic coil and the small substrate 17.

On the small substrate 17, contact pins 18 are arranged. The contact pin 18 is a connection cable 2 for associating with a print hammer drive unit (not shown) equipped with a print element drive circuit (not shown) for driving the dot print hammer 11.
This is for connecting 0. Contact pin 18
Are arranged m units for each connection unit, and the connection cable 20 is an FPC with a connector 19 or a connector 19
And is connected to the contact pin 18.

Immediately above the hammerbank 10, a cooling air duct 22 for suppressing a rise in temperature due to heat generation of the winding 14 due to the release current is disposed, and acts to cool the heat of the radiating fins 16.

On the front surface of the dot printing hammer 11, an ink ribbon 21 crawls from behind the hammer bank 10.
And a printing paper 23 are arranged, and a space adapted to various printing paper thicknesses is provided between the dot printing hammer 11 and the platen 24, and the printing is performed while the shuttle mechanism 25 reciprocates in the row direction. By supplying a release current and driving the dot printing hammer 11, dot printing is performed.

The number n of contacts of the connector 19 of the connection cable 20 is determined by the contact pin 18 as the connection unit.
, At least n = m + 1.

On the other hand, the cover 30 has a locking portion 31 on the contact pin side and the connector insertion / removal direction side, and a locking portion 33 on the connector width direction side substantially perpendicular to the connector insertion / removal direction.
Is provided, and the contact pin and the connector are sandwiched by the cover. Therefore, the connector 19 and the contact pin 18 can be prevented from coming off by the action of the cover.

A flange 34 having an arbitrary length and width is provided on the connector side of the cover 30.
With this configuration, the cover 30 bends and clamps the connection cable 20 at an arbitrary distance from the connector, and can also serve as a cable cover.

Further, the cover 30 is provided with projections 35 for closing the contact holes on both sides of the connector 19, and by inserting it into the connector 19, erroneous insertion can be prevented.

[0024]

As described above, according to the present invention, the engaging portions are provided on both the insertion and removal directions of the connector connected to the contact pin and the width direction of the connector is perpendicular to the insertion and removal direction of the connector. Since the contact pin and the connector are sandwiched by the cover having a locking portion that engages and disengages on both sides of the connector, the one-touch cover can be attached and removed from above with the connector inserted into the contact pin, and the connector can be removed. Can be prevented.

Further, a flange having an arbitrary length and width is further provided on the connector side, and an FPC or FFC is bent and sandwiched at an arbitrary distance from the connector to form a cover which engages with a contact pin. ,
The FFC or FPC immediately after being connected to the hammerbank is covered by the reciprocating motion of the hammerbank so that the cable does not break due to contact with other components, eliminating the need for bending the cable immediately after being connected to the hammerbank. .

Further, since the number n of contacts of the FPC or FFC connector is at least n = m + 1 with respect to the number m of contact pins as the connection unit, one of the covers is provided with a projection for closing the contact. Incorrect insertion can be prevented, and there is no need to bury a pin serving as a cover in an extra contact as in the related art and to impart polarity.

[Brief description of the drawings]

FIG. 1 is a side view of a hammer bank showing an example of the present invention.

FIG. 2 is a plan view of a hammer bank showing an example of the present invention.

FIG. 3 is a perspective view of a cover showing an example of the present invention.

[Explanation of symbols]

10 is a hammer bank, 11 is a dot printing hammer, 12 is a magnet, 13 is a core, 14 is a winding, 15 is a bobbin, 16
Is a radiation fin, 17 is a small board, 18 is a contact pin,
19 is a connector, 20 is a connection cable (FPC or FF)
C), 21 is an ink ribbon, 22 is an air duct, 23 is printing paper, 24 is a platen, 25 is a shuttle mechanism, 30
Is a cover, 31 is a connector pin side insertion direction locking portion, 32 is
Is a connector side insertion direction locking portion, 33 is a connector width direction locking portion, 34 is a connector side flange portion, and 35 is a projection for closing a contact.

Claims (3)

[Claims] 1. A dot printing hammer provided at a predetermined pitch along a printing line, magnet means for generating a magnetic attraction force to hold the dot printing hammer at a non-printing position, and A core to be held at the non-printing position, a bobbin arranged around the core, a winding wound around the bobbin, and a wire pin connected to each wire end and a contact pin are arranged. A dot hammer drive unit having a small substrate and a print hammer drive unit on which a print drive circuit is mounted, and the contact pins being connected via a connection cable with a connector; A cover having a locking portion that is removably engaged with the connector in the width direction of the connector substantially perpendicular to the insertion and removal direction of the connector. A dot line printer characterized in that a contact pin and a connector are sandwiched between covers. 2. A flange having an arbitrary length and width is formed on the connector side of the cover, and the cover bends and clamps the connection cable at an arbitrary distance from the connector to engage with the contact pin. 2. The dot line printer according to claim 1, wherein the dot line printer is configured to perform the following. 3. The number n of the contacts of the connector of the connection cable is at least n = m + 1 with respect to the number m of the contact pins as the connection unit, and the cover is provided with a projection for closing an extra contact. Dot line printer.