JP2005276638A - Fluid-tight structure of connector box, and liquid injection head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid-tight structure of a connector box, which makes the surroundings of a signal transmitting member introduced from an inlet in a box partition wall fluid-tight, with a simple structure, and also responds to a mobile electronic apparatus equipped with a liquid injection head. <P>SOLUTION: This fluid-tight structure of the connector box 41 houses a connector terminal 32 to connect the contact part 36 of the signal transmitting member 35 introduced from the inlet 43 formed in the box partition wall 42. The inlet 43 is covered with a sealing member 51 having a slit-shaped insertion part 56 to pass the signal transmitting member 35 through, a cap member 61 provided with an opening part 66 to make the signal transmitting member 35 pass through is put on the sealing member 51, the cap member 61 is restrained by a locking means 71 provided in the connector box 41 to press down the sealing member 51, the seat part 54 of the sealing member 51 is made to closely adhere to the top face of the box partition wall 42 around the inlet, and the slit-shaped insertion hole 56 of the sealing member 51 is narrowed to make it closely adhere to the signal transmitting member 35. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a liquid-tight structure of a connector box for electrically connecting a plate-like signal transmission member such as a flexible substrate (cable), and a liquid jet head including the same.

  Conventionally, connector terminals are stored in a connector box in order to protect them from the external environment. In order to connect a flexible board to a connector terminal stored in the connector box, the flexible board is attached to the box partition wall. The flexible substrate is introduced from the introduction port, and the contact portion is electrically connected to the connector terminal.

  As a waterproof structure of such a connector box, as shown in FIG. 7, an introduction port 83 formed in the box partition wall 82 of the connector box 81 and a flexible substrate 86 connected to the connector terminal 85 in the connector box 81. An adhesive 87 is filled in the gap, or as shown in FIG. 8, the upper portion of the introduction port 83 through which the flexible substrate 86 passes is covered with a cover member 89 having an insertion port 88 through which the flexible substrate 86 passes. Or the like was filled with a sealing agent 90.

  As a technology related to this, for example, Japanese Patent Application Laid-Open No. 2002-124337 (Patent Document 1) discloses a housing having a receiving passage for internally holding a terminal with respect to the end of a flexible substrate cable and an outer peripheral portion forming the receiving passage. A retainer that has a first opening through which the flexible board cable passes, can be inserted into the receiving passage, and electrically contacts an end of the passed flexible board cable with the terminal when fully inserted, and the flexible board cable There is disclosed an invention having a second opening through which a cover is provided that can be locked over an outer peripheral portion, and a seal member is filled in a space surrounded by the retainer and the cover.

  Japanese Patent Laid-Open No. 2001-155815 (Patent Document 2) discloses a case in which a sealing body of a flexible printed board is fitted to a fitting portion of a waterproof connector and the contact portion of the flexible printed board is connected to a press contact terminal. The invention of the structure which latches a latching protrusion part to a latching hole part so that engagement / disengagement is possible is disclosed.

  Further, Japanese Patent Laid-Open No. 10-189180 (Patent Document 3) discloses a first substrate insertion portion in which a plurality of first electrical connectors that are in electrical contact with a first flexible substrate are arranged in a housing, and the first substrate insertion portion. And a second substrate insertion portion in which a plurality of second electrical connectors that are in electrical contact with the second flexible substrate are arranged in a stepped manner, and the upper openings of the first and second substrate insertion portions are opened and closed. And the 1st pressurizing part which presses the contact part of the 1st electric connector via the 1st flexible substrate, and the contact part of the 2nd electric connector is pressed via the 1st and 2nd flexible substrate. An invention is disclosed in which a pressure member provided with a second pressure portion is mounted so as to be rotatable in the vicinity of the front end portion of the upper opening of the second substrate insertion portion.

JP 2002-124337 A JP 2001-155815 A JP-A-10-189180

  However, as shown in FIG. 7, an adhesive 87 is filled in the gap between the introduction port 83 and the flexible substrate 86, or as shown in FIG. 8, the cover member is placed above the introduction port 83 through which the flexible substrate 86 passes. In the waterproof structure of the connector box 81 covered with 89 and filled with the sealing agent 90, it is necessary to ensure a sufficient drying time of the adhesive at the time of assembly. Later, it becomes difficult to replace parts, so that there is a problem of poor maintenance. The waterproof structure described in Patent Document 1 also has a similar problem because the seal member is filled in the space surrounded by the retainer and the cover.

  Moreover, the thing of patent document 2 fits the sealing body of a flexible printed circuit board to the fitting part of a waterproof connector, and can engage / disengage the latching protrusion part of a sealing body to the latching hole part of a waterproof connector. Since it is locked, it is a waterproof structure of the connector itself, and cannot be applied to the case where the contact portion of the flexible printed board is soldered to the surface mount terminal, and is inferior in versatility.

  Further, the one described in Patent Document 3 is mainly intended to mount two flexible boards, and a seal member interposed in the flexible board is added to the contact portion of the electric connector via the flexible board. Since the contact is made with the pressure member to be pressed, it cannot be applied to the case where the contact portion of the flexible printed board is solder-connected to the surface mount terminal, and is inferior in versatility.

  In recent years, various electronic devices have been made mobile. In particular, in order to make mobile devices compatible with electronic devices such as printers equipped with a liquid ejecting head, flexible substrates for supplying drive signals to the liquid ejecting head are required. It is necessary to protect the terminal connection portion from ink leakage, and development of a liquid-tight structure of a connector box surrounding the terminal connection portion is desired.

  The present invention has been made in view of the above circumstances, and has a simple structure and a liquid-tight structure of a connector box that can surely be waterproofed, and a liquid that can be used for mobile by including this liquid-tight structure. An object is to provide an ejection head.

The liquid tight structure of the connector box of the present invention has been proposed in order to achieve the above object, and has an introduction port for introducing a plate-like signal transmission member into the box partition wall and introduced from the introduction port. A liquid tight structure of a connector box containing therein a connector terminal for electrically connecting a contact portion of the signal transmission member,
A seal member made of an elastic material, having a slit-like insertion portion through which the signal transmission member is inserted at the top, a seating portion at the lower end, and covering the introduction port;
A cap member that is placed on the seal member and has an opening at the top for allowing the signal transmission member to pass therethrough, and a taper portion in a hollow interior;
Locking means for holding the cap member on the connector box in a state of covering the sealing member;
With
The locking means presses the cap member against the sealing member to bring the seating portion of the sealing member into close contact with the box partition wall around the introduction port, and the tapered member presses the sealing member to form a slit-like insertion portion. It is characterized in that it is narrowed so as to be in close contact with the signal transmission member.

  According to the above configuration, the seating portion of the seal member is brought into close contact with the box partition wall around the introduction port by the pressing force of the locking means pressing the cap member against the seal member, and the seal member is pressed by the tapered portion. Thus, the slit-like insertion portion is narrowed and brought into close contact with the signal transmission member, so that it can be sealed at two locations, and thereby the liquid-tightness of the connector box can be achieved with a simple structure.

  And it is desirable to arrange | position the taper part of a cap member in the inner surface which opposes a signal transmission part, and to form an inclined part in the outer surface of the sealing member which this taper part contacts.

  When such a configuration is adopted, since the tapered portion of the cap member is in contact with the inclined portion of the seal member obliquely, it becomes easy for the cap member to narrow the slit-like insertion portion of the seal member, thereby securely contacting the signal transmission member. Can be made.

  Moreover, it is desirable to set the length of the slit-shaped insertion part of the seal member to be equal to or smaller than the width of the signal transmission member. If it does in this way, it can be made to stick to a seal member and seal it without applying separate pressing force in the width direction of a signal transmission member.

  Even if the signal transmission member is a flexible substrate or a hard substrate, the sealing member is securely adhered and sealed.

  The elastic material is preferably made of a soft elastic material. In this way, when the sealing member is made of a soft elastic material, the sealing member is easily deformed by the pressing force of the cap member, and the sealing member can be securely attached to the signal transmission member or the box partition wall by applying a small force. Can do. Therefore, it is not necessary to provide a large locking means, and it is easy to make it compact.

  The liquid jet head according to the present invention includes a flow path unit in which a series of liquid flow paths are formed in the case that pass through the common liquid chamber and the pressure chamber and reach the nozzle opening, and the liquid introduced from the liquid inlet is pressurized. A liquid ejecting head that ejects droplets from the nozzle opening by driving a pressure generating element in a chamber, and the case is provided with the connector box according to claim 1, A connector terminal is provided on a wiring board housed in the connector, the connector terminal and the pressure generating element are electrically connected by a relay cable, and the pressure generating element is driven through the relay cable and the signal transmission member. A signal is supplied.

  With this configuration, a liquid ejecting head having a simple waterproof function and a reliable waterproof function can be obtained. Therefore, the liquid tightness of the connector box provided in the liquid ejecting head can be achieved with a simple structure, and it can be applied to mobile electronic devices. For this reason, when it is mobile, even if it leaks from the liquid storage part etc. or gets wet with liquid such as water or drink, it can protect around the electrical connection of the signal transmission member, Troubles such as malfunction or damage due to a short circuit can be prevented in advance.

  The best mode for carrying out the present invention will be described below with reference to the drawings. The present embodiment is an example in which the liquid tight structure of the connector box according to the present invention is applied to an ink jet recording head which is a kind of liquid ejecting head.

  1 is a perspective view showing the appearance of an ink jet recording head 1 (hereinafter abbreviated as recording head 1), FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and a partially enlarged view, and FIG. FIG. 4 is an exploded perspective view of the recording head 1 as viewed from the upper right front. For convenience of explanation, the supply needle base portion 8 side is assumed to be the front of the recording head 1, the substrate base portion 10 side is assumed to be the rear of the recording head 1, and the nozzle row orthogonal direction is assumed to be the left-right direction.

  As shown in these drawings, a recording head 1 is used for recording an image or the like by ejecting droplet-like ink (a kind of liquid). 1 includes an ink supply needle 2 to be introduced into the head 1, a head unit 4 having a piezoelectric vibrator 3 that functions as a pressure generating element, and a wiring board 6 that supplies a drive signal to the piezoelectric vibrator 3 via a relay cable 5. 7 is schematically configured.

  The case 7 includes a supply needle base portion 8 in which a plurality of ink supply needles 2 are arranged side by side in, for example, two front and rear rows and three rows, and a head unit that protrudes downward from the bottom surface of the supply needle base portion 8. An attachment portion 9 and a substrate base portion 10 that extends rearward from the rear wall of the head unit attachment portion 9 and on which the wiring substrate 6 is disposed. In the present embodiment, as the material of the case 7, for example, a material obtained by mixing glass fiber with a thermoplastic resin such as a modified PPE (polyphenylene ether) resin to improve the strength is used.

  The supply needle base portion 8 is a plate-like member that is long in the left-right direction, and is a portion where the ink supply needle 2 is disposed. The tip of the ink supply needle 2 disposed on the supply needle base 8 is pointed in a conical shape so that it can be easily inserted into the ink cartridge. Further, a plurality of ink introduction holes communicating with the inside and outside of the ink supply needle 2 are formed at the tip of the ink supply needle 2 and stored in the ink cartridge through these ink introduction holes (liquid introduction ports). Ink is introduced into the recording head 1. Since the recording head 1 of the present embodiment is capable of discharging six types of ink, a total of six ink supply needles 2 are arranged on the supply needle base portion 8 with the tip protruding upward. Is done.

  The head unit mounting portion 9 is a hollow box-shaped member having an empty portion inside. A part of the ink supply path for supplying ink from the ink supply needle 2 to the head unit 4 and most of the relay cable 5 are accommodated in the empty portion of the head unit mounting portion 9.

  The head unit 4 includes an actuator unit 18 and a flow path unit 19, and the actuator unit 18 and the flow path unit 19 are integrated in an overlapped state. The actuator unit 18 is formed by laminating a pressure chamber plate in which a pressure chamber corresponding to each nozzle opening is formed, a communication port plate in which a communication port is formed, and a vibration plate (not shown) on which the piezoelectric vibrator 3 is mounted. Are integrated.

  The flow path unit 19 includes a supply port plate 22 that forms an ink supply port and a compliance portion that relieves pressure fluctuations of the reservoir, a reservoir plate 24 that forms a plurality of reservoirs (common liquid chambers), and a plurality of nozzle openings. The nozzle plate 26 in which the nozzle rows arranged in a row are formed is laminated and integrated.

  The piezoelectric vibrator 3 of the actuator unit 18 is a so-called flexural vibration mode piezoelectric vibrator. When the piezoelectric vibrator 3 is driven, that is, flexurally vibrated, the volume of the pressure chamber changes and ink droplets are ejected from the nozzle openings. Discharged. The piezoelectric vibrator 3 is formed with a connection terminal (not shown) for supplying a drive signal to the drive electrode, and one end side connector terminal 30 of the relay cable 5 is electrically connected to the connection terminal by soldering or the like. Connected to. Here, the relay cable 5 in which the one-end-side connector terminal 30 is connected to the piezoelectric vibrator 3 is bent in a standing state with respect to the piezoelectric vibrator 3. The head unit 4 is attached to the front end side (bottom surface) of the head unit attachment portion 9 with the nozzle plate 26 facing downward, and the edge portion is protected by the head cover 28.

  The relay cable 5 is a film-like wiring member on which a wiring pattern for supplying a drive signal to the piezoelectric vibrator 3 is formed. A connector terminal 30 electrically connected to a connection terminal (not shown) of the piezoelectric vibrator 3 is formed at one end side of the relay cable 5, and the wiring board 6 is connected to the other end side. Connector terminals 31 that are electrically connected to board connector terminals (not shown) are formed.

  The substrate base portion 10 is a plate-like member that is long in the left-right direction (the direction perpendicular to the nozzle row), and the wiring substrate 6 is disposed on the upper surface (substrate disposition surface), and the relay cable 5 is connected to the wiring substrate 6. Is done. A laterally long box-like connector box 41 is provided around the board base portion 10 so as to surround the wiring board 6.

  The connector box 41 is configured to be liquid-tight so as to prevent the leaked ink from entering the substrate base portion 10 from the side in the unlikely event that ink leakage occurs on the supply needle base portion 8 side. ing.

  The wiring board 6 is mounted with conductor patterns and electronic components for various driving signals to be supplied to the piezoelectric vibrator 3 of the head unit 4 and is also connected to the connector terminal 31 on the other end side of the relay cable 5. This is a substrate on which (not shown) is formed. A connector terminal 32 is mounted on the wiring board 6, and a contact portion 36 of a plate-like signal transmission member 35 from the control device is inserted into the connector terminal 32 so as to be electrically connected. Yes.

  In the connector box 41, an inlet 43 for introducing the plate-like signal transmission member 35 is formed in a long hole shape in the box partition wall 42 that constitutes the upper surface, and the above-described inlet introduced from the inlet 43 into the inside. The connector terminal 32 for connecting the contact portion 36 of the signal transmission member 35 is housed inside the wiring board 6 together. That is, the connector box 41 has a horizontally long box-shaped sealed space formed by the box partition wall 42 and the substrate base portion 10 except for the portion where the long hole introduction port 43 for introducing the plate-like signal transmission member 35 is opened. A compartment is formed.

  Examples of the plate-like signal transmission member 35 include a flexible substrate such as an FFC (flexible flat cable) that transmits various signals such as a drive signal and a control signal, and a hard substrate such as a glass epoxy substrate. It is introduced into the inside from the long hole-like introduction port 43, and the contact portion 36 is inserted into the connector terminal 32 and is electrically connected. In the present embodiment, the contact portion 36 of the flexible flat cable as the signal transmission member 35 is inserted and connected to the connector terminal 32, but the present invention is not limited to this, and the connector terminal 32 is connected to the signal transmission member 35. A surface-mounting terminal for solder-connecting the contact portion 36 may be used.

  The upper part of the long hole-like inlet 43 of the connector box 41 is covered with a seal member 51, and a cap member 61 is covered on the seal member 51, thereby ensuring a waterproof function.

5A and 5B show a seal member 51 according to the present embodiment, where FIG. 5A is a plan view, FIG. 5B is a longitudinal sectional view, FIG. 5C is a front view, FIG. 5D is a back view, and FIG. Is a side view, and (f) is a cross-sectional view in the width direction.
The seal member 51 has a substantially convex cross section (horizontal hat shape), and a central convex portion 52 has a side wall portion 53 inclined upward and inward. An inclined portion 52 ′ that is inclined more than the inclination of the side wall portion 53 is formed at the position (outer surface) where the tapered portion formed on the inner surface of the cap member 61 to be abutted is formed at the lower end of the side wall portion 53. Thus, the seating portion 54 that abuts the upper surface of the box partition wall 42 is formed in a flange shape so as to project to the periphery. In addition, a slit-like insertion portion 56 for allowing the signal transmission member 35 to pass therethrough is opened along the longitudinal direction of the upper surface at an upper portion 55 (top portion) that closes the upper end of the side wall portion 53 of the seal member 51. The slit 58 is formed at both end portions 58 of the slit insertion portion 56 so as to be narrower than other portions. The liquid tightness after the signal transmission member 35 is inserted is sufficiently ensured because the both end portions 58 are formed in a linear shape. Since the signal transmission member 35 such as a flexible flat cable is passed through the slit-like insertion portion 56, the opening length L is set slightly narrower than the lateral width of the signal transmission member 35. Even if the slit width W of the central portion is set to be slightly larger than the thickness of the signal transmission member 35 in consideration of the ease of insertion of the signal transmission member 35, the liquid tightness is secured by tightening the cap member 61. Although the fixing property is secured, the signal transmission member 35 is fixed by the seal member 51 and becomes liquid-tight when it is set to be slightly smaller than the thickness of the signal transmission member 35. When the member 51 is fitted, the signal transmission member 35 attached to the seal member 51 is not inadvertently displaced, and the liquid-tightness can be further improved. The seal member 51 is made of a soft material having flexibility such as rubber or elastomer.

FIG. 6 shows a cap member 61 in the present embodiment, where (a) is a plan view, (b) is a longitudinal sectional view, (c) is a front view, (d) is a back view, and (e). ) Is a side view, and (f) is a cross-sectional view in the width direction.
The cap member 61 is a hollow member having a substantially convex cross section (horizontally long mountain shape), and the convex part 62 has a side wall part 63 inclined upward and inward, and the lower end of the side wall part 63 is the seal described above. It will contact | abut on the seating part 54 of the member 51. FIG. In addition, an opening 66 for allowing the signal transmission member 35 to pass through is opened in the shape of a long hole along the longitudinal direction of the upper portion 65 (top portion) that closes the upper end of the side wall portion 63 of the cap member 61. ing. Since the opening 66 allows the signal transmission member 35 such as a flexible flat cable to pass through, the opening length S is set to be slightly larger than the lateral width of the signal transmission member 35. A tapered portion 64 is formed on the inner surface (longitudinal inner surface) of the cap member 61 at a position facing the signal transmission member 35. The inclination angle α of the tapered portion 64 is such that when the cap member 61 is fixed, the inclined portion 52 ′ of the seal member 51 is pressed to narrow the width of the slit-like insertion portion 56 so as to be in close contact with the front and back surfaces of the vibration transmitting member 35. It is set to an angle that is not excessive or insufficient (for example, about 60 degrees). Further, at both ends in the longitudinal direction of the cap member 61, a locking portion 72 for locking the locking means 71 provided in the connector box 41 is formed as a concave stepped portion protruding below the upper portion 65. Has been. Note that thick reinforcing portions 68 are formed along the longitudinal direction at both end portions in the width direction of the cap member 61, and sufficient rigidity is ensured even when integrally molded with a resin material.
And the cap member 61 which consists of such a structure is fastened to a connector box by the latching means 71 in the state which covered the said sealing member.

  As shown in FIG. 2, the locking means 71 is constituted by inverted L-shaped locking claws that are erected from the vicinity of both ends in the longitudinal direction of the introduction port 43 of the box partition wall 42. The pawl 71 is hooked on the engaging portions 72 at both ends in the longitudinal direction of the cap member 61 to restrain the cap member 61 and press the seal member 51 toward the box partition wall 42. Thus, when the cap member 61 is stopped in a state where the cap member 61 is put on the seal member 51 by the locking means 71 and the seal member 51 is pressed, the lower end of the side wall portion 63 of the cap member 61 presses the seating portion 54 of the seal member 51 and is introduced. The taper portion 64 on the inner surface of the cap member 61 presses against the inclined portion 52 ′ of the side wall portion 53 of the seal member 51, thereby causing the cap member 61 to be in close contact with the upper surface of the box partition wall 42 around the opening 43. The slit-shaped insertion part 56 of the seal member 51 can be narrowed and brought into close contact with the front and back surfaces of the signal transmission member 35 as it is pushed. The tapered portion 64 is only a portion of the inner surface of the cap member 62 that faces the front and back surfaces of the signal transmission member 35, and is not formed in a portion that faces both ends of the signal transmission member 35. Therefore, the signal transmission member 35 is sealed in close contact with the seal member 51 by receiving the pressing force of the locking means 71 only in the thickness direction. And about the both ends of the width direction of the signal transmission member 35, since the length of the slit-shaped insertion part 56 of the seal member 51 is set to be equal to or less than the width of the signal transmission member (same dimension or slightly shorter than the width), the seal Both ends of the slit-like insertion portion 56 are in close contact with and sealed at both ends of the signal transmission member 35 by the elastic force of the member 51 itself, and the signal transmission member 35 is not unnecessarily curved.

  In the present embodiment, the locking means is constituted by a locking claw. However, in the present invention, the locking means is not limited to this, and any type can be used as long as the cap member can be stopped in a state of covering the sealing member. It may be configured. For example, the cap member may be configured to be screwed to the box partition wall, or may be configured to be secured in a detachable state with a toggle fitting.

  As described above, according to the present embodiment, the connector box 41 having a liquid-tight structure is provided on the recording head 1 that discharges the liquid introduced from the liquid inlet as droplets by driving the pressure generating element 3. Equipped with a simple liquid-tight structure and a reliable sealing function. Therefore, even if the printer including the ink jet recording head is made mobile, the connection portion between the signal transmission member and the connector terminal can be reliably protected.

  In the above embodiment, an example in which a piezoelectric vibrator having a flexural vibration mode is used has been described. However, a so-called longitudinal vibration mode piezoelectric vibrator may be applied to the present invention. Further, although an example in which a piezoelectric vibrator is used as a pressure generating element has been described, the present invention is not limited thereto, and the present invention is also applied to a liquid ejecting head that discharges droplets using another pressure generating element such as a heat generating element. Can be applied. In the above embodiment, an example in which the present invention is applied to an ink jet recording head has been described. However, the present invention is not limited to this. The present invention relates to, for example, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, an electrode material ejecting head used for forming an electrode such as an organic EL display or FED, and a bioorganic matter ejecting head used for manufacturing a biochip. The present invention can also be applied to other liquid jet heads.

1 is a perspective view illustrating an appearance of an ink jet recording head. It is the sectional view on the AA line in FIG. 1, and a partial enlarged view. It is the BB sectional drawing and partial enlarged view in FIG. FIG. 3 is an exploded perspective view of the recording head as viewed from the upper right front. The sealing member in this invention is shown, (a) is a top view, (b) is sectional drawing of a longitudinal direction, (c) is a front view, (d) is a back view, (e) is a side view, (f) ) Is a cross-sectional view in the width direction. The cap member in this invention is shown, (a) is a top view, (b) is sectional drawing of a longitudinal direction, (c) is a front view, (d) is a back view, (e) is a side view, (f) ) Is a cross-sectional view in the width direction. It is sectional drawing which shows an example of the waterproof structure of the conventional connector box. It is sectional drawing which shows the other example of the waterproof structure of the conventional connector box.

Explanation of symbols

1 liquid ejecting head, 2 ink supply needle, 3 pressure generating element (piezoelectric vibrator),
4 Head unit, 5 Relay cable, 6 Wiring board, 7 Case, 8 Supply needle base part, 9 Head unit mounting part, 10 Substrate base part, 18 Actuator unit, 19 Flow path unit, 22 Supply port plate, 24 Reservoir plate, 26 nozzle plate, 28 head cover, 30 connector terminal on one end side of relay cable, 31 connector terminal on the other end side of relay cable, 32 connector terminal, 35 signal transmission member, 36 contact portion, 41 connector box, 42 box partition wall, 43 inlet, 51 sealing member, 52 convex portion, 53 side wall portion, 54 seating portion, 56 slit-shaped insertion portion, 58 both end portions, 61 cap member, 62 convex portion, 63 side wall portion, 64 taper portion, 65 upper portion, 66 Opening, 68 Reinforcement, 71 Locking means, 72 Department,
W slit width, L slit length, S opening length,

Claims (7)

A connector box having an introduction port for introducing a plate-like signal transmission member into a box partition wall, and housing a connector terminal for electrically connecting a contact portion of the signal transmission member introduced from the introduction port. Liquid-tight structure,
A seal member made of an elastic material, having a slit-like insertion portion through which the signal transmission member is inserted at the top, a seating portion at the lower end, and covering the introduction port;
A cap member that is placed on the seal member and has an opening at the top for allowing the signal transmission member to pass therethrough, and a taper portion in a hollow interior;
Locking means for holding the cap member on the connector box in a state of covering the sealing member;
With
The locking means presses the cap member against the sealing member to bring the seating portion of the sealing member into close contact with the box partition wall around the introduction port, and the tapered member presses the sealing member to form a slit-like insertion portion. A liquid tight structure for a connector box, wherein the connector is narrowed so as to be in close contact with the signal transmission member.   2. The liquid tightness of the connector box according to claim 1, wherein a tapered portion of the cap member is disposed on an inner surface facing the signal transmission portion, and an inclined portion is formed on an outer surface of the seal member with which the tapered portion abuts. Construction.   3. The liquid tight structure for a connector box according to claim 1, wherein a length of the slit-like insertion portion of the seal member is set to be narrower than a width of the signal transmission member.   4. The connector box liquid-tight structure according to claim 1, wherein the signal transmission member is a flexible substrate.   The liquid tight structure of the connector box according to claim 1, wherein the signal transmission member is a hard substrate.   6. The connector box liquid-tight structure according to claim 1, wherein the elastic material is a soft elastic material. A flow path unit having a series of liquid flow paths formed through the common liquid chamber and the pressure chamber to the nozzle opening is provided in the case, and the liquid introduced from the liquid introduction port is driven by the pressure generating element in the pressure chamber. A liquid ejecting head that ejects droplets from the nozzle opening,
The connector box according to any one of claims 1 to 6 is provided in the case, a connector terminal is provided on a wiring board housed in the connector box, and the connector terminal and the pressure generating element are disposed between the connector terminal and the pressure generating element. Are electrically connected by a relay cable, and a drive signal is supplied to the pressure generating element via the relay cable and the signal transmission member.

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