JPH06127016A - Multi-pin recording head - Google Patents

Abstract

PURPOSE:To provide a connection structure of a multi-pin recording head in which a single-sided printed board can be used, and the printed board can be divided into sections of a size that can be manufactured by one light exposing process. CONSTITUTION:On one surface of a wiring board 20, 2M pieces of terminals 21 are provided so that wires 23 to be grouped by a plurality of connectors 22a, 22b are not crossed with each other. On the other hand, N sets of first and second electrodes 101a and 101b (wires 15) are divided into bundles by N pieces to be grouped, and 2M sets of the bundles of the wires 15 are each bundled at the corresponding terminal position 21 of the wiring board 20. N pieces of recording electrodes to be grouped are connected to the wiring board 20 at one terminal and led out approximately perpendicularly to the arrangement direction of the terminal parts 21 of the wiring board 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-needle recording head suitable as an electrostatic recording type recording head. More specifically, the present invention relates to an improvement in the connection structure of recording electrodes of a multi-needle recording head to a wiring board.

[0002]

2. Description of the Related Art A multi-needle recording head of the same surface control type used in an electrostatic recording system generally has two rows of recording electrodes 101 arranged at a high density with a constant pitch, as shown in FIG.
a, 101b and the corresponding two rows of control electrodes 102
a and 102b are solidified by an electrode support block 103 such as an electrically insulating resin. For example, M (=
128) M × N consisting of N (= 55) sets with one set as a set
(= 7040) first recording electrodes (also referred to as ODD-side recording electrodes in the present specification) 101a, and M × N (= 7040) first recording electrodes 101a arranged in parallel with the first recording electrodes 101a. Two recording electrodes (this is also referred to as an EVEN side recording electrode in the present specification) 101b, and control electrodes 102a, which are respectively arranged outside the columns along the columns of the first and second recording electrodes 101a, 101b. 102b and 102b are provided so as to expose the respective end surfaces to the surface of the resin block / electrode support block 103 made of an insulating resin and having a length of about 1 m.

This multi-needle recording head has been conventionally used, for example, in FIG.
2 and a manufacturing method using a drum-shaped mold 202 as shown in FIG. Drum shaped mold 20
2, a concave portion 204 for injecting the electrically insulating resin 203 to be the electrode support block 103 is provided in the axial direction, and the outer peripheral surface has a constant pitch (for example, a diameter of 0.0635 m).
A spiral groove (not shown) is formed by 0.127 mm when using a wire rod of m. According to this molding die 202, after winding the wire material 201 to be the recording electrode around the spiral groove on the outer peripheral surface, the concave portion 204 is covered with the mold plate 205 from above and the space S between the concave portion 204 and the insulating material is electrically insulating. Resin 20
A multi-needle recording head is obtained by injecting 3 and hardening. Here, reference numeral 207 in the figure denotes the wire 201 and the template 2.
It is a double-sided adhesive tape for temporarily fixing 05. The wire 201 is cut near the surface of the electrode support block 103 in which the resin 203 is solidified (for example, a portion indicated by reference numeral XX in the drawing). By the way, the wire rod 201 is wound around the spiral groove of the drum 202, then covered with the spacer 206, and then further wound to be double wound. Therefore, one wire (electrode 101) fitted in the spiral groove of the drum 202 is
While (a) is arranged at a constant pitch, the other wire (electrode 101b) wound on it via a spacer 206.
Are arranged in a zigzag manner so as to fit between the wire rods 201 held in the groove of the drum.

The multi-needle recording head obtained by such a method, as shown in FIGS. 14 and 15, has respective recording electrodes 101a and 101b and control electrodes 102a and 102b.
Is once connected to the wiring board 104 and then connected to an external drive circuit or the like.

At this time, a large number of M × N recording electrodes 10 are formed.
1a and 101b are divided into a plurality of blocks and connected to a driver circuit in order to simplify the drive circuit. Therefore, in the longest wiring part, the wiring board 1
When wiring to the other end side of 04, a considerably long wire is required. However, since the wire rods pulled out from the head have the same length, the wire rods cannot be drawn around the entire area of the wiring board 104 to be connected. Therefore, conventionally, as shown in FIG. 16, the recording electrode group is roughly divided into two in the right half and the left half of the head in order to minimize the length of the recording electrode and the wire extending to the wiring board 104. After that, it is connected to the wiring board. That is, the wiring board 10
On the right half of the front surface of 4 (for convenience of explanation, the surface forming the ODD side connector 105a is referred to as the front surface, and the surface forming the EVEN side connector 105b is referred to as the back surface), the recording electrodes (27 × 128 × 2) of the right half of the head are provided. 256 terminals 106 for connecting the recording electrodes (28 × 128 × 2) on the left half of the back surface are connected to the left half of the back surface.
The terminals 107 are provided at some locations, and the electrodes that should originally be in one group are once divided into two groups, and then the wiring board 10 is formed.
I am trying to connect to 4. Further, there are provided 256 through holes 108 for connecting the electrodes belonging to the same group on the front surface and the back surface to one and connecting to the connector, and the through holes 108 and the respective terminals 106 and 107 on the front surface and the back surface are wired. By connecting at 109, they are combined into one group and then connected to the connector 105a or 105b.

[0006]

However, in this connection structure, 25 formed on the right half of the wiring substrate 104.
6 terminals 106 and 256 terminals 1 on the left half
07 and 256 through holes 10 formed on the entire surface
Since the wiring 109 for connecting the wirings 8 and 8 must be formed on the entire surface of the wiring board 104, the wiring boards on both sides are arranged so that the wirings 109 respectively connected to the right half terminal 106 and the left half terminal 107 do not intersect. Must be used. Moreover, since the wiring pattern is formed so as to cross the entire surface of the wiring board 104, the wiring board needs to be an integrated board having a length of about 1 m. Therefore, an integrated substrate having almost the same length as the recording head (about 1 m) is required, and it cannot be used on a normal wiring board (up to about 50 cm). Since the wiring pattern cannot be exposed at one time, the wiring pattern must be exposed twice in the left half and the right half. Therefore, it is necessary to prepare a special wiring board, which is extremely expensive.

It is an object of the present invention to provide a wiring structure for a multi-needle recording head which can use a single-sided printed board and can divide the printed board into a size that can be manufactured by one exposure.

[0008]

In order to achieve the above object, the present invention provides M.times.N first recording electrodes consisting of N sets with M sets as one set and a predetermined interval in parallel therewith. Multi-needle recording in which M × N second recording electrodes arranged in parallel are arranged at a constant pitch, and the first and second recording electrodes are once connected to the wiring board and then connected to an external drive circuit. In the head, 2M terminals are provided on one surface of the wiring board in a state where wirings grouped into a plurality of connectors do not intersect with each other, and are grouped from N groups of the first and second recording electrode groups. A bundle of 2M sets of wire rods divided into N electrodes each of which should be bundled is bundled at corresponding terminal positions of the wiring board, and the N recording electrodes to be grouped are connected to the wiring board at one place. That is the terminal part of the wiring board It is drawn out in a direction substantially orthogonal to the arrangement direction.

[0009]

Therefore, all the wiring patterns connecting the 2M terminals corresponding to the N ODD side recording electrodes and the EVEN side recording electrodes to be grouped and the connector connected to the external drive circuit are arranged in the vertical direction (wiring board). Is formed in a direction orthogonal to the terminal arrangement direction), and the wiring board can be divided in the terminal arrangement direction. Therefore, a large-sized wiring board for connecting all the recording electrodes can be obtained by dividing the wiring board into appropriate sizes and mechanically connecting the wiring patterns formed on one surface by single exposure.

[0010]

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

First, a molding die used for manufacturing the multi-needle recording head of the present invention will be described with reference to FIGS.

The molding die 1 shown in this embodiment is a two-cavity molding die for simultaneously obtaining two multi-needle recording heads.
Two molds 1 and 1 having the same structure are butted to form a cavity for forming an electrode supporting block of the multi-needle recording head between them. The molding die 1 has cavity grooves 2 and 3 for accommodating the control electrode 13 and injecting a resin for hardening the control electrode 13 and the wire material 15 serving as the recording electrode, formed in parallel to each other. 3 and the outside of both the cavity grooves 2 and 3 are formed with jetty portions 4, 5 and 6, and a wire rod holding groove 14 for holding the wire rod 15 serving as a recording electrode in these jetty portions 4, 5 and 6 Are formed at a constant pitch. Then, the control electrode 13 housed in one of the molds 1
The recording electrode (wire material 15) is on the ODD side, and the control electrode 13 and the recording electrode (wire material) housed in the other mold 1 are on the EVEN side. As shown in FIG. 8, a plate fitting groove 16 is formed in each of the cavity grooves 2 and 3 along each of the jetty portions 4, 5 and 6, and the control electrode 13 and the circuit board 12 soldered to the control electrode 13 are formed. By fitting the control electrode support plate 11 holding
It is provided so that the control electrode 13 can be arranged at a predetermined position.

As shown in FIGS. 1 and 6, on the upper surfaces of the jetty portions 4, 5 and 6, M pieces are arranged in a direction traversing the cavity grooves 2 and 3 (direction orthogonal to the axial direction of the molding die 1). N to pair
A set of M × N wire rod holding grooves 14 is formed. For example, 55 sets with 128 sets as one set (total 7040 lines)
The wire holding groove is formed. This wire rod holding groove 1
As shown in FIG. 10, 4 is a wire rod 1 that constitutes a recording electrode.
5 has a groove pitch P substantially equal to twice the diameter of 5 and a depth and width approximately equal to V-shaped,
Part of the wire 15 wound around the mold 1 is engaged, and M ×
The N wires 15 are aligned and held in parallel at a constant pitch.

Further, on the outer sides of the jetty portions 5 and 6 on both sides, the direction pins 7 _L and 7 _R on the ODD side and the EVEN side for orienting the wire rod 15 and the wire rod 15 of the same kind divided for each block are provided. Bundling pins 8 _L and 8 _R on the ODD side and EVEN side, which are grouped and bundled, and turn pins 9 _L and 9 _R on the ODD side and EVEN side, which rotate the wire 15, are provided.
Pins 7 _L , 7 _R , 8 _L , 8 _R on the DD side and the EVEN side,
Is a 9 _L, 9 position of the wire rod 15 passing tension utilizing _R and to change the orientation. The wire 15 is stretched across the cavity grooves 2 and 3 between the orientation pins 7 _L and 7 _R , and the jetty portion 4 between the cavity groove 2 and the cavity groove 3 and the two cavity grooves 2 and 3 are formed. It is held by the wire-holding grooves 14 formed in the outer jetty portions 5 and 6. The molding die 1 is provided with a rotary shaft 10 for swingably supporting the molding die 1 on a wire rod winding machine or the like.

The orientation pins 7 _L and 7 _R serve to orient the wire rod 15 engaged with the wire rod holding grooves 14 and 14 as shown in FIG.
6) Each book is provided. Wire bundle pin 8 _L , 8
_R is for guiding N wire rods 15 belonging to the same group from the wire rod group which is divided into N sets in the wire rod holding groove 14 and arranged to the corresponding one turn pin 9 _L , 9 _R , Accurately N (= 55) wires can be wound around. Further, each of the turn pins 9 _L and 9 _R is for winding and bundling N (= 55) wire rods 15 by one and guiding them to other pins. These wire rod bundling pins 8 _L and 8 _R and turn pins 9 _L and 9 _R are
Each M (= 128) lines are provided. Each of the pins 8 _R and 9 _R on the ODD side has four groups A ₁ , A ₂ , A ₃ and A of 32 pins as shown in FIG.
₄ to be divided, pin 32 duty at the same pitch between each group A ₁ to A ₄ is provided with a gap C occupied. Also, the pins 8 _L and 9 _L on the EVEN side are similarly
Four groups B ₁ of each 32 with a gap C,
Pins 8 _R and 9 on the ODD side are divided into B ₂ , B ₃ and B _4.
It is provided so as to be located in the gap C between the _R groups A _{1 to} A ₄ . Therefore, the bundles of wire rods bundled by the pins 8 _R , 9 _R , 8 _L , and 9 _L on the ODD side and the EVEN side are arranged so as not to overlap each other when they are superposed on one plane. These pins 7 _L , 7 _R , 8 _L , 8 _R ,
How to hang the wire on 9 _L and 9 _R is, for example, the first on the ODD side.
1,129,257, ..., 55 so that the 55 recording electrodes / wires 15 erected in the 6913th wire holding groove 14 can be hung on the turn pins 1,129, 257 ,.
The wire rod is routed by utilizing the direction thrusting pin 7 _R near the 6913th wire rod holding groove 14 and the first wire rod bundling pin 8 _R. At this time, on the EVEN side, O
55 recording electrodes are applied to the first turn pin 9 _L on the EVEN side, which is the 33rd turn pin counted from the first turn pin 9 _R on the DD side.

A multi-needle recording head is obtained as follows using the molding die 1 constructed as described above.

First, before starting to wind the wire 15 around the pair of molding dies 1 and 1, the necessary parts such as the control electrode 13 are housed in predetermined positions of the cavity grooves 2 and 3 of the respective molding dies 1 and 1 and installed. To be done.

Then, for example, by using a winding machine as shown in FIG. 5, the pins 7 _L , 7 _R , 8 _L , 8 _R , 9 _L , 9 _R on the ODD side and the EVEN side of each molding die 1, 1 are formed. By winding or hooking the wire rods 15 on the wire rods 15, the wire rods 15 are fitted into the M × N wire rod holding grooves 14 so that the wire rods 15 are laid across the cavity grooves 2 and 3 while being aligned at a constant pitch. . The pins 7 _L , 7 _R , 8 _{L of} this wire 15
The hooking on 8 _R , 9 _L and 9 _R is performed by a combined movement of the swing of the molding die 1 and the movement of the nozzle 17 for supplying the wire 15 in the pin arrangement direction. Then, the wire material 15 is bundled into a bundle of N electrodes each of which should be grouped at the position of the corresponding terminal 21 of the wiring board 20. For example, referring to FIG. 3, the wire 15 is connected to the first ODD side turn pin 9 _R.
→ 1st ODD side wire rod bundling pin 8 _R → 1st ODD
Side direction pin 7 _R → 1st wire rod holding groove 14 → 1st EVEN Side direction pin 7 _L → 1st (1st O
33rd in cumulative number of pins from the turn pin 9 _R on the DD side:
Hereinafter, EVEN side wire bundled pins 8 _L → 1 -th parentheses) the cumulative pin (33 th) EVEN side Tanpin 9 _L → 1 th EVEN side wire bundled pins 8 _L → 129 th (33-th) of EVEN near the wire holding groove 14
Side orientation pin 7 _L → 129th wire rod holding groove 14 →
ODD side orientation pin 7 _{R in} the vicinity of the 129th wire holding groove 7 _R → 1st ODD side wire bundle pin 8 _R → 1st ODD side turn pin 9 _R → 1st ODD side wire bundle pin 8 _R → 257 ODD near the thirteenth wire rod holding groove 14
Side orientation pin 7 _R → 257th wire rod holding groove 14 →
EVEN side orientation pin 7 _L near the 256th wire holding groove 14 → 1st (33rd) EVEN side wire rod bundling pin 8 _L → 1st (33rd) EVEN side turn pin 9 _L → 1st ( (33rd) EVEN side wire rod bundling pin 8 _L → EVEN near the 385th wire rod holding groove 14
Side orientation pin 7 _L → It is wound around the wire holding groove 14 of the 385th in order, 1,129,257, ..., 6913
The wire rod 15 is dropped into the wire rod holding grooves 14 at a total of 55 positions. Next, the wire rod 15 is provided with the second ODD side turn pin 9 _R → the second ODD side wire rod bundling pin 8 _R → the ODD side orientation pin 7 _R → in the vicinity of the second wire rod holding groove 14.
Second wire rod holding groove 14 → second wire rod holding groove 14
Near the EVEN side orientation pin 7 _L → 2nd (34th) EVEN side wire bundle pin 8 _L → 2nd (34th) EVEN side turn pin 9 _L → 2nd (34th)
EVEN side wire bundle pin 8 _L → 130 EVEN side orientation pin 7 _L → 130 near the thirteenth wire rod holding groove 14
The second wire holding groove 14 → the 129th wire holding groove 1
4 ODD side orientation pin 7 _R → 2nd ODD
Side wire bundle pin 8 _R → to the second ODD side turn pin 9
Wrap with _R in order, 2,130,258, ..., 691
The wire rod 15 is dropped into the fourth total of 55 wire rod holding grooves 14. By repeating such work, M × N (704
Wrap all the wire material 15 for 0 pieces. This state is shown in FIG. Here, the winding machine is provided so that a motor 18Y that oscillates the rotary shaft 10 of the molding die 1 and a motor 18X that rotates a feed mechanism (screw) that linearly moves the nozzle 17 are controlled by a controller 19 in synchronization. ing.

Then, when the winding of the last set of wire rods 15 is completed, each turn pin 7 on the ODD side and the EVEN side is wound.
_R ~9 N (= 55) placed to _L to M sets of bundle of the recording electrodes and wire rods 15 fixed with adhesive fast drying in the portion close to each Tanpin 9 _R, 9 _L, N of wire rods Make sure that the bundle of 15 does not come apart and that the wire length up to the turn pins 9 _R and 9 _L does not fluctuate. by this,
The bundle of M wires 15 grouped together is the wiring board 20.
Are bundled at the corresponding positions of the terminals 21 and are drawn out in the direction orthogonal to the terminal arrangement direction. Then, when the bundle of wire rods is fixed, the wire rod 15 pulled out from the nozzle 17 is cut. In order to make the winding of the wire more reliable, the member applied with a pressure not to cut the wire slides axially on the jetty 4 at the center and is not engaged with the groove 14. If there is 15, it is preferable to drop it into the groove 14. Similarly, the wire rod 15 is also wound on the other forming die 1 on the other side forming a pair, and M × N wire rods are fitted into the predetermined wire rod holding grooves 14.

Then, when the M × N wire rods in the respective molding dies 1 and 1 are completed, the molding dies 1 are moved to the cavity grooves 2 and 3 and the jetty portion 4 as shown in FIGS. Butt so that 5, 5 and 6 face each other. At this time, as shown in FIG. 10, a pair of butted molding dies 1,
1, the spacers (not shown) for maintaining a predetermined gap G between the recording electrodes face each other.
The wire rod 15 which forms the recording electrode of the one molding die 1 and the wire rod 15 which forms the recording electrode of the other molding die 1 are interleaved with each other and are offset by a half pitch (P / 2) of the diameter of the wire rod 15. It is arranged in a staggered pattern. afterwards,
A member (not shown) that forms a part of the molding die by closing both end openings of the cavity grooves 2 and 3 is attached to both end surfaces of both molding dies 1 and 1, and the cavities 2 and 3 are alternately inserted from the resin injection port. The molten insulating resin is injected, the electrode support block is molded, and each wire 15 and the control electrode 13 are fixed.

After casting, the bundle of wire rods 15 wound around the respective turn pins 9 _L and 9 _R is removed, and then the molding dies 1,
1 is divided, and the head materials 26, 26 fixed by the electrode support block 25 are taken out from the respective cavity grooves 2, 3 together with the control electrode holding plate 11 and the like. Next, the head materials 26, 26 are similarly taken out from the molding die 1 side of the other side. Since the two head materials 26, 26 are connected by the wire rod 15 as shown in FIG. 11, the wire rod 15 in the portion engaged with the wire rod holding groove 14 of the jetty portion 4 at the center is cut in the middle. As a result, the two head materials 26 are separated. The separated head material is polished into a curved surface having a predetermined radius of curvature to complete a multi-needle recording head.

The multi-needle recording head obtained as described above constitutes the ODD side recording electrode (first recording electrode) and the EVEN side recording electrode (second recording electrode) as shown in FIG. A bundle of M sets of wire rods 15 is connected to each of the 2M terminal portions 21 provided on one surface of the wiring board 20. At this time, since the ODD-side recording electrode and the EVEN-side recording electrode were arranged so as to be displaced from each other in a staggered manner when wound on the molding die 1 and divided into groups, when they are folded back and arranged on one plane, they are mutually arranged. It does not overlap. Further, the control electrode 13 is connected by connecting the terminals of the wiring board 12 and the wiring board 20 which are both embedded in the electrode support block 25. Here, the wiring board 20
As shown in FIG. 2, the two single-sided printed circuit boards 20
It is composed of A and 20B. Further, one printed circuit board 20A is provided with 128 (= M) terminals 21 and connectors 22a and 22b for connecting the terminals 21 into four groups of 32 terminals each and connecting them to an external drive circuit. In the case of this embodiment, the terminals 21 are arranged at a constant pitch in the longitudinal direction of the printed circuit board, and 32 terminals are wired as one group to the connectors 22a and 22b. The first group is the terminal for the ODD side recording electrode. Is connected to the ODD side connector 22a, and the next group is connected to the EVEN side connector 22b as an EVEN side recording electrode terminal, and the ODD side and the EVEN side are alternately provided. Similarly, the other printed circuit board 20B has 12
Eight terminals 21 and two ODD side connectors 22a, 2
Two EVEN side connectors 22b are provided. Further, in the figure, reference numeral 23 is a wiring pattern, and 24 is a control electrode connector.

The above-described embodiment is one example of the preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. For example, in the present embodiment, the ODD side recording electrode and the EVEN
32 side recording electrodes are connected to the connector in groups of 32, and four ODD-side connectors and four EVEN-side connectors are alternately arranged. The wiring board may be provided with the ODD side connector and the terminal, and the other wiring board may be provided with the EVEN side connector and the terminal.

[0024]

As is apparent from the above description, according to the present invention, 2M terminals are provided on one side of a wiring board in a state where wirings grouped into a plurality of connectors do not intersect each other, and N sets of terminals are provided. 2M sets of wire rods divided into N electrodes for grouping from the first and second recording electrode groups are bundled at corresponding terminal positions of the wiring board to Since there is only one connection point to the wiring board and it is drawn out in a direction substantially orthogonal to the arrangement direction of the terminal section of the wiring board, the terminal for connecting the recording electrode drawn out from the multi-needle recording head and the external drive circuit. Wiring for connecting to the connector for connecting with can be formed vertically and the wiring board can be divided in the longitudinal direction of the head.
Therefore, a small-sized printed circuit board on one side can be used, and a large wiring board can be obtained only by mechanically connecting the printed circuit boards laterally. Moreover, the cost of the substrate can be reduced because it can be divided into a size that can be manufactured by one exposure.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a connection structure between a multi-needle recording head and a wiring board according to the present invention.

FIG. 2 is a plan view showing an embodiment of a printed circuit board.

FIG. 3 is a plan view showing an example of windings on a molding die when manufacturing the multi-needle recording head of the present invention.

FIG. 4 is a plan view showing an enlarged relationship between the wire rod holding groove, the orientation pin, the wire bundle pin, and the turn pin.

FIG. 5 is a perspective view showing a work state of winding a mold.

FIG. 6 is a plan view showing an example of a molding die.

FIG. 7 is a perspective view illustrating a state before a pair of molding dies are matched with each other.

FIG. 8 is a front view showing, in a partially sectioned manner, a die-matching state of a pair of molding dies.

9 is a side view of FIG.

FIG. 10 is an explanatory diagram showing a positional relationship between the wire rod holding grooves of the pair of molding dies and the first and second recording electrodes in the mold matching state.

FIG. 11 is a cross-sectional view showing the head material taken out from the molding die.

FIG. 12 is a perspective view illustrating a method of manufacturing a conventional multi-needle recording head.

FIG. 13 is an explanatory diagram showing a state in which a multi-needle recording head is molded in the manufacturing method of FIG.

FIG. 14 is a perspective view of an example of a multi-needle recording head.

FIG. 15 is a vertical cross-sectional view showing a connection state of a multi-needle recording head with a wiring board.

FIG. 16 is a perspective view illustrating a connection state of a conventional recording electrode to a wiring board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold 2, 3 Cavity groove 15 Wire material which comprises a recording electrode 20 Wiring board 20A, 20B Printed board which comprises a wiring board 21 Wiring board terminal 22a ODD side connector 22b EVEN side connector 23 Wiring pattern

Claims (1)

[Claims] 1. M × N first recording electrodes consisting of N sets with M sets as one set, and M × N second recording electrodes arranged in parallel with the first recording electrodes at a predetermined interval. In a multi-needle recording head in which the first and second recording electrodes are once connected to the wiring board and then connected to an external drive circuit in a plurality of connectors arranged on one side of the wiring board. While 2M terminals are provided in such a manner that the divided wirings do not intersect each other, 2M sets of wire rods are divided into N sets of electrodes to be grouped from the N sets of the first and second recording electrode groups. The bundle is bundled at each corresponding terminal position of the wiring board, and the N recording electrodes to be grouped are connected to the wiring board at one place and are substantially orthogonal to the arrangement direction of the terminal portion of the wiring board. To be pulled out in the direction Multi-needle recording head for the butterflies.