JP3255787B2 - Inkjet recording head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording head for performing recording by discharging droplets from fine discharge ports.

[0002]

2. Description of the Related Art Recording devices such as printers, copiers, and facsimile machines use paper or plastic thin sheets,
It is configured to record an image composed of a dot pattern on a recording material such as cloth.

The recording apparatus can be classified into an ink jet type, a wire dot type, a thermal type, an electrophotographic type, and the like according to its recording method. The recording liquid droplets are ejected, and the recording liquid droplets are attached to a recording material to perform recording.

[0004] Above all, a print head of a system (bubble jet system) in which thermal energy is applied to ink to discharge ink droplets by using pressure has a good response to a print signal and a high density of discharge ports. It has advantages such as being easy.

FIG. 15 is a perspective view showing a schematic configuration of a conventional ink jet recording head.

This ink jet recording head 900 is
A plurality of discharge ports 909, an ink flow path provided for each discharge port 909 and communicating with the discharge ports 909, and a liquid chamber commonly provided in the ink flow path for supplying ink to each ink flow path; A discharge energy generating element disposed in each ink flow path. Here, the ejection energy generating element is a substrate (heater board) 90 made of silicon or the like.
1 are arranged on the surface of the semiconductor device 1 using a semiconductor manufacturing technique.

On the other hand, the ink flow path and the liquid chamber are
The discharge port 909 is formed as a part where the groove is exposed on the side surface of the grooved top plate 902. In this case, the flow path wall separating the adjacent ink flow paths is formed as a linear projection between the groove portions of the grooved top plate 902. The inkjet recording head 900 includes a support member 903 for constructing each component and configuring the inkjet recording head.
The substrate 901 is disposed on the upper surface, and the substrate 901 and the grooved top plate 902 are provided.
Instead of being fixed with an adhesive,
It is completed by pressure bonding.
This causes the adhesive to enter the flow path. This is to prevent the discharge performance from deteriorating. The spring plate member 904 is for applying a pressing force to the grooved top plate 902, and its leg portion 904 e has a through hole 903 b provided in the support member 903.
Has been inserted.

In the ink jet recording head configured as described above, the heater board 901 and the grooved top plate 902
Are simply crimped together by the pressing force of the spring plate member 904, and if one or both of the heater board 901 and the grooved top plate 902 have poor flatness, the grooved top plate 902 and the heater board 901 are not bonded. And a gap may occur between them. Therefore, in order to prevent ink from leaking from this gap, the heater board 901 and the grooved top plate 90 are used.
The outer periphery of the joint 2 is sealed with a sealant.

[0009]

In the above-mentioned conventional ink jet recording head, when the spring for press-fitting the grooved top plate and the substrate is mounted, the spring is urged so that the spring does not come into contact with the top plate. In this case, it is necessary to mount the apparatus, etc. on assembly, and there is a problem that the cost is increased.

In particular, a line type head requires a considerable load (several tens of kilograms in total load), and a considerable load is also applied to a device for biasing a spring, so that the manufacturing apparatus becomes large. From this point, the manufacturing cost has been increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has been made in view of the above-mentioned problems. The purpose is to realize a head.

[0012]

The ink jet recording head of the present invention In order to achieve the above object, according a first member having a plurality of grooves communicating with each of a plurality of ink discharge ports and said ink discharge ports, said Lee
Energy for discharging ink from each of the ink discharge ports
Second device having a plurality of energy generating elements for generating energy
Member , a supporting member for supporting the second member, and the supporting member
Supported by a member, the first member and the second member
And a pressure generating unit that generates the pressure
And each of the grooves corresponds to each of the energy generating elements.
The first member and the second member are pressed into contact with each other.
In the ink jet recording head engaged, the pressure
The force generating unit is moved forward while being supported by the support member.
The pressure is applied to the first member by applying a pressing force to the first member.
It generates a contact force and supports the support member.
The pressing force on the first member is released while being held.
Characterized in that it can maintain the separated state .

Further, the pressing force generating unit includes
A plurality of pressing portions for applying a pressing force to the first member;
Then, the pressing force is divided and applied by the plurality of pressing portions,
The release state of the pressing force can be held independently by each pressing part
It may be something .

Further, the pressure-contacting force is generated is by using a spring force
It may be made.

[0015] In addition, calling the contact force is using a tightening of the screw
May be alive.

[0016]

According to the present invention, the pressing force generating unit for press- fitting the top plate and the substrate is supported by the supporting member for supporting the substrate.
Holds the state where the pressing force against the top plate is released while being held
Can Runode, it is possible to easily positioning work by releasing the pressing force when performing the positioning of each member.

Further, the pressing force generating unit is mounted on the top plate.
And a plurality of pressing portions for applying a pressing force
Press to divide the pressing force and apply
The Der Rukoto capable holding a released state, even in the long line head, the top plate, a compression bonding of the substrate, can be performed by dividing and can be easily assembled without any large-scale apparatus Things.

[0018]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are diagrams for explaining the configuration of the main components of the ink jet recording head of the present invention. In this embodiment, the density of the ink ejection ports is 360 dpi (7
(0.5 μm) will be described.

In FIG. 2, the heater board 100 has a discharge energy generating element 101 at a predetermined position at 360 dp.
128 are provided at the density of i. For this, a signal pad for driving the ejection energy element 101 at an arbitrary timing by an external electric signal,
A plurality of pads 102 such as power pads for supplying electric power for the driving are provided.

The heater board 100 is adhered and fixed on the surface of a base plate 300 made of a material such as metal or ceramics with an adhesive.

FIG. 3 shows a detailed view of the state where the heater boards 100 are arranged. The heater board 100 is adhered and fixed to a predetermined location of the base plate 300 by an adhesive 301 applied at a predetermined thickness. At this time, the discharge energy generating element 1 provided on the heater board 100
00 is the pitch P arranged on the heater board 100 =
The discharge energy generating elements of the heater board adjacent to the same pitch as 70.5 μm are precisely arranged so as to have the same pitch. In addition, the gap between the heater boards generated at this time is sealed with the sealant 302. The heater boards 100 are not limited to those arranged as described above, and may be an integral heater board.

Returning to FIG. 2, a wiring board 400 is adhered to the base plate 300 in the same manner as the heater board 100. At this time, the plurality of pads 102 on the heater board 100 and the plurality of pads 401 for signal / power supply provided on the wiring board 400 are bonded and adhered in a predetermined positional relationship corresponding to each. I have. The wiring board 400 is provided with a connector 402 for supplying a print signal and driving power from the outside.

Next, the top plate 200 will be described with reference to FIG.

In FIG. 4, a top plate 200 records a plurality of channels 202 provided corresponding to the ejection energy generating elements 101 provided on the heater board 100 and ink provided corresponding to each channel 202. An orifice 203 communicating with each flow path 202 for discharging toward the medium, and a flow path 20 for supplying ink to each flow path 202;
The liquid chamber 201 communicates with the liquid chamber 201, and an ink supply port 204 through which ink supplied from an ink tank (not shown) flows into the liquid chamber 201. Top plate 200
It is needless to say that the length is set to substantially cover the ejection energy generating element array provided with a plurality of the heater boards 100 arranged side by side.

Returning to FIG. 1, the top plate 200
Each discharge energy generating element 10 on the heater board 100 arranged on each flow path 202 and the base plate 300
1 and are combined so that the positional relationship with each of them becomes a predetermined corresponding positional relationship.

At this time, as a joining method, a method of mechanically pressing down with a spring or the like is used.

In FIG. 1, the holding spring 600 is mounted on a holding spring unit 500, and the holding spring unit 500 is fixed to the base plate 300 by caulking or bolting, and the top plate 200 is pressed by the spring force of the holding spring 600. And the heater board 100 by pressure bonding. The spring force at this time depends on the rigidity of the top plate 200, but is required to be 0.2 to 0.4 kg / mm in this embodiment.

When the top plate 200 is fixed to the base plate 300, the pressing spring 600 includes a pressing spring unit 500, a pressing spring 600 and a charging pin 700 shown in FIGS.
The spring force is not applied to the top plate 200. The unit that generates this pressure contact force is provided with a mechanism that can release the pressure contact force and maintain the tightened state.

The holding spring unit 500 is provided with a plurality of keyhole-shaped through holes as shown in FIG. The presser spring 600 is formed by joining a plate-shaped member bent at two places and a U-shaped member as shown in a sectional shape in FIG. The plate-like member is housed below the through hole so as to face upward, and only the plate-like member protrudes outside the presser spring unit 500 so that the top plate 200 can be pressed.

The charge pin 700 is used by being inserted into a through hole provided in the presser spring unit 500. As shown in FIG. 6, a lock portion 700b is provided at the insertion portion to maintain the inserted state. The non-insertion portion is provided with an L-shaped stop portion 700a for rotation control. When rotating the charge pin 700, the stop portion 700a contacts the presser spring unit 500 to control the amount of rotation. In addition, a D-cut portion is provided at the top to determine the direction of the charge pin 700, so that the insertion direction, the alignment and the rotation operation are easy.

The charge pin 700 having the above-described structure is inserted into the presser spring unit 500, rotated and locked, so that the plate-like member forming the presser spring
Since the contact portion of the character-shaped member is changed, and the leading end position of the plate-shaped member, which is a portion for pressing the top plate 200, rises, the top plate 2
The crimping force against 00 is released.

When performing pressure bonding between the top plate 200 and the heater board 100, as shown in FIG.
00 into the presser spring unit 500, and
Is released. After aligning and fixing the presser spring unit 500 and the base plate 300, the charge pin 700 is rotated in the opposite direction and pulled out, so that the tip of the presser spring 600 contacts the top plate 200 as shown in FIG. The top plate 200 and the heater board can be joined by pressure bonding.

As described above, the top plate 200 and the heater board 100 are operated by operating the charge pins in the vertical and rotational directions.
The operation of press-bonding and releasing with the metal can be easily performed.

In the line type head shown in this embodiment, since the required total load reaches several tens of kilograms, it is desirable to divide one spring force into 4 to 5 kilograms or less. Further, in the case of performing pressure bonding, by joining the pressing springs in order from the center to both ends, the top plate follows the warpage or bending of the substrate, and a good bonding state is obtained. Further, by pressing the member between the presser spring and the presser spring unit, the pressing force of each presser spring can be adjusted independently, and a more preferable joining state can be obtained. In addition, by having the detachable crimping force control member (charge pin) as in this embodiment, the unit can be made compact, and the durability and operability can be improved.

The present invention is not limited to the line type head.

Next, the recording head of the present invention will be described with reference to FIGS.

As described above, the orifice, the orifice, and the heater board in which the discharge energy generating elements are formed are accurately arranged and bonded on the base plate of glass, silicon, ceramics metal or the like.
By joining a top plate having a liquid flow path formed therein, a flow path is formed to manufacture an ink jet recording head.

FIG. 8 is a perspective view schematically showing the structure of an ink jet cartridge to which the above ink jet recording head is applied.

The ink jet cartridge IJC includes an ink jet recording head 550 and an ink tank 5 for storing ink supplied to the ink jet recording head.
51 are integrally formed.

FIG. 9 is a schematic diagram of a so-called full-line type ink jet recording head having a width corresponding to the recording width of a recording medium, in which the most remarkable effect of the recording head to which the present invention can be applied, and an ink jet recording apparatus thereof. FIG.

In FIG. 9, reference numeral 660 denotes a full-line type ink jet recording head.
The ink is ejected toward a recording medium 670 such as paper or cloth which is conveyed to the recording medium, thereby performing recording. In the case of the ink jet recording head of the present invention, since a recording head is manufactured by arranging a plurality of heater boards provided with ejection energy generating elements, a long ink jet recording head such as a full line head can be easily manufactured.

In the above-described recording apparatus, the type and number of the ink jet recording heads to be mounted have been described using only one single color ink. However, a plurality of inks having different recording colors and densities are used. May be provided in plurality. That is, it is natural that the head of the present invention is also used for a color recording apparatus equipped with a plurality of heads corresponding to a plurality of color inks.

FIG. 10 is a schematic view of an ink jet recording apparatus IJRA to which the four color integrated ink jet recording head of the present invention shown in FIG. 9 is applied.

In FIG. 10, a lead screw 5004 in which a spiral groove 5005 is cut is interlocked with forward and reverse rotation of a drive motor 5013, and drive force transmission gears 5011 and 5009 are provided.
Is driven to rotate. The carriage P is engaged with the spiral groove 5005 by a pin (not shown), and is slidably guided by the guide rail 5003, so that it can reciprocate in the directions of the arrows a and b shown in the figure. I have. An ink jet head cartridge 4030 in which an ink jet head having the same configuration as that shown in each of the above-described embodiments and a liquid storage container that holds ink to be supplied to the ink jet head is integrally mounted on the carriage HC in a detachable manner. ing. As a result, color printing can be performed with one inkjet head, and a small-sized inkjet device for color printing is realized.

The paper pressing plate 5002 applies the recording medium P to the platen roller 50 in the moving direction of the carriage HC.
Press against 00. Photo coupler 5007, 500
Reference numeral 8 denotes a home position detecting unit for confirming the presence of the lever 5006 of the carriage HC in this area and performing reverse rotation of the driving motor 5013 in the rotation direction. A cap member 5022 for capping the front surface of the ink jet head cartridge 5030 is supported by a support member 5016, further includes a suction unit 5015, and performs suction recovery of the ink jet head cartridge 5030 through an opening 5023 in the cap. Body support plate 50
A cleaning plate 5017 slidably supported by the supporting plate 5019 is moved in the front-rear direction by driving means (not shown). The configuration of the cleaning blade 5017 is not limited to the illustrated one, and it is needless to say that a known blade can be applied to this embodiment. The lever 5021 is used to start the suction recovery operation, and moves with the movement of the cam 5020 that contacts the carriage HC.
The driving force from 013 is controlled by a known transmission means such as a gear 5010 or clutch switching.

The capping, cleaning, and suction recovery processes are performed at corresponding positions by the action of the lead screw 5004 when the carriage HC reaches the home position side area. If a desired operation is performed at a known timing, any of the embodiments can be applied.

In addition, in the embodiments of the present invention described above, the ink is described as a liquid. However, an ink which solidifies at room temperature or lower and which softens or liquefies at room temperature is used. Or, in the ink jet method, the temperature of the ink itself is controlled within a range of 30 ° C. or more and 70 ° C. or less to control the temperature so that the viscosity of the ink is in a stable ejection range. A liquid in which the ink is liquid at the time of application may be used. In addition, ink that solidifies in a standing state and liquefies by heating may be used.

(Another Embodiment) FIG. 1 shows another embodiment of the present invention.
1 to 13.

FIG. 12 shows the top plate 1200 and the heater board 1
FIG. 13 shows a cross-section of the presser at the time of bonding with 00, and FIG. 13 shows a state where the presser force is released.

In FIG. 11, a support 15 having an L-shaped cross section is shown.
10 is fixed to the base plate 1300 by caulking or bolting. A holding member 1610 having an L-shaped cross section is fixed on the wiring board 1400 with one end serving as a fulcrum, and the other end, which is an open end, is disposed on the top surface of the top plate, like the support 1510. Adjustment screw 1
Pushed by 520, the pressure contact force between the top plate 1200 and the heater board 1100 is transmitted.

The mounting of the holding mechanism (pressing force released state) and the pressing of the top plate 1200 and the heater board 1100 will be described.

As shown in FIG. 12, at the time of mounting, it is fixed to the support 1510 by the charge screw 1530.

The adjusting screw 1520 is set so as not to hit the pressing member 1610.

In this state, the charge screw 1530 is turned to release the screwing state with the holding member 1610, and the holding member 1610 is set in a free state. The distal end of the holding member 1610 is in contact with the top plate 1200 by its own weight, and no pressing force is generated.

Next, as shown in FIG.
By tightening 0, the pressing member 1610 is pressed to apply a pressing force to the top plate 1200 and the heater board 110. The pressure contact force can be adjusted by managing the tightening torque of the adjusting screw 1520, managing the screw rotation angle, and the like.

As described above, the top plate 20 can be controlled only by controlling the adjusting screw.
Since the pressure contact force between the heater board 100 and the heater board 100 can be controlled and the apparatus can be simple, the cost is low and the assembly is easy.

In particular, in the case of a long (line head) type recording head as shown in this embodiment, fine adjustment can be performed by dividing the recording head over the entire area, and more reliable pressure bonding can be performed.

In this embodiment, a long recording head is shown, but the invention is not limited to this.

The present invention brings about an excellent effect particularly in an ink jet recording head and an ink jet recording apparatus of the ink jet type which perform recording by forming flying droplets by utilizing thermal energy among the ink jet recording methods. .

The typical configuration and principle are described in, for example, US Pat. Nos. 4,723,129 and 4,740.
It is preferable to use the basic principle disclosed in the specification of Japanese Patent No. 796. This method can be applied to both the so-called on-demand type and continuous type. In particular, in the case of the on-demand type, liquid (ink)
By applying at least one drive signal corresponding to the recorded information and providing a rapid temperature rise exceeding nucleate boiling to an electrothermal transducer arranged corresponding to the sheet or liquid path in which This is effective because heat energy is generated in the electrothermal transducer, causing film boiling on the heat-acting surface of the recording head, and as a result, air bubbles in the liquid (ink) corresponding one-to-one to this drive signal can be formed. It is. By discharging the liquid (ink) through the discharge opening by the growth and contraction of the bubble, at least one droplet is formed. When the drive signal is formed into a pulse shape, the growth and shrinkage of the bubble are performed immediately and appropriately, so that the ejection of liquid (ink) having particularly excellent responsiveness can be achieved, which is more preferable.

As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. Further, if the conditions described in US Pat. No. 4,313,124 relating to the temperature rise rate of the heat acting surface are adopted, more excellent recording can be performed.

As the configuration of the recording head, in addition to the combination of the discharge port, the liquid path, and the electrothermal converter (linear liquid flow path or right-angled liquid flow path) as disclosed in the above-mentioned respective specifications, The present invention also includes a configuration using U.S. Pat. No. 4,558,333 and U.S. Pat. No. 4,459,600, which disclose a configuration in which a heat acting portion is arranged in a bending region.

In addition, JP-A-59-123670, which discloses a configuration in which a common slit is used as a discharge section of an electrothermal transducer for a plurality of electrothermal transducers, or absorbs pressure waves of thermal energy. The present invention is also effective as a configuration based on JP-A-59-138461, which discloses a configuration in which an opening corresponds to a discharge unit.

It is preferable to add recovery means for the ink jet recording head, preliminary auxiliary means, and the like provided as components of the ink jet recording apparatus of the present invention since the effects of the present invention can be further stabilized. is there. If these are specifically mentioned, capping means for the recording head, cleaning means, pressurizing or suction means, preheating means using an electrothermal transducer or another heating element or a combination thereof, and printing Performing a preliminary ejection mode for performing another ejection is also effective for performing stable printing.

In addition, the form of the ink jet recording apparatus according to the present invention is not limited to the one provided integrally or separately as an image output terminal of an information processing device such as a word processor or a computer, a copying apparatus combined with a reader, May take the form of a facsimile machine having a transmission / reception function.

[0067]

Since the present invention is configured as described above, it has the following effects.

[0068] In one described in claim 1, pressing force generating Yoo for performing compression bonding of the top plate and the heater board
Knit, occurrence of the pressing force as a pressing force, by those that can hold the release state in the pressure-contacting force generating unit, can simplify the assembly manufacturing, it is possible to miniaturize and simplify the manufacturing equipment This has the effect of facilitating assembly and reducing manufacturing costs.

According to the second aspect, the top plate
Since the pressing can be performed in a divided manner, it is possible to adjust the load, the order of the pressing force, the load distribution in the discharge port row direction, and the like, and it is possible to perform more secure pressure bonding.

According to the third aspect of the present invention, since the pressing force is generated by using the spring force, the structure can be simplified, and in addition to the above-described effects, the operation of the press-fitting and releasing can be easily performed. There is an effect that can be.

[0071] In those described in claim 4, the adjustment of the pressing force, controlling the tightening torque of the adjusting screw, it is possible to perform the management of the screw rotation angle, it is possible to further improve workability effect There is.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an ink jet recording head of the present invention.

FIG. 2 is a schematic perspective view of the inkjet recording head of the present invention.

FIG. 3 is a schematic diagram for explaining an arrangement of a heater board according to the present invention.

FIG. 4 is a schematic diagram of a top plate of the inkjet recording head of the present invention.

FIG. 5 is a cross-sectional view of the top plate and the heater board in a state where a pressing contact force is released.

FIG. 6 is a schematic perspective view showing a charge pin structure.

FIG. 7 is a sectional view of FIG. 1 (in a state where a pressing force is generated).

FIG. 8 is a schematic perspective view of an ink jet cartridge to which the ink jet recording head of the present invention is applied.

FIG. 9 is a diagram conceptually illustrating a full-line inkjet recording head and a recording apparatus equipped with the inkjet recording head according to the present invention.

FIG. 10 is an explanatory diagram of a recording apparatus equipped with an inkjet cartridge to which the inkjet recording head of the present invention is applied.

FIG. 11 is a schematic perspective view of an ink jet recording head according to another embodiment of the present invention.

FIG. 12 is a cross-sectional view of FIG.

13 is a cross-sectional view of FIG. 11 (in a state where a pressing force is generated).

FIG. 14 is a schematic perspective view illustrating a configuration of a conventional inkjet recording head.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Heater board 101 Discharge energy generating element 102 Pad 200 Top plate 201 Liquid chamber 202 Flow path 203 Orifice 204 Ink supply port 300 Base plate 301 Adhesive 302 Sealant 400 Wiring board 500 Pressing spring unit 510 Support 520 Adjusting screw 530 Charge screw 550 Inkjet recording head 551 Ink tank 600 Holding spring 610 Holding member 650 Recording medium transport roller 660 Full line inkjet recording head 670 Recording medium 5000 Platen roller 5002 Paper pressing plate 5003 Guide rail 5004 Lead screw 5005 Spiral groove 5006, 5021 Lever 5007, 5008 Photocoupler 5009, 5011 Driving force transmission gear 5010 Gear 5013 Drive motor 5015 Suction unit 5016 Support member 5017 Cleaning blade 5018 Main body support plate 5019 Support plate 5020 Cam 5022 Cap member 5023 In-cap opening 5030 Inkjet head cartridge HC carriage P Recording medium

──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Hiroshi Koizumi 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Shuji 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon (72) Inventor Yoshikazu Omata 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Tsuyoshi Orikasa 3-30-2, Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Akira Goto 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Kimiyuki Hayashizaki 3-30-2 Shimomaruko 3-chome, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Masaki Inaba 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Takayuki Ono 3-30-2 Shimomaruko, Ota-ku, Tokyo Kya (56) References JP-A-5-116288 (JP, A) JP-A-3-101955 (JP, A) JP-A-58-45950 (JP, A) JP-A-3-227634 (JP) , A) JP-A-6-126943 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B41J 2/05 B41J 2/16

Claims (4)

(57) [Claims] 1. A a first member having a plurality of grooves communicating with each of a plurality of ink discharge ports and said ink discharge ports, said Lee
Energy for discharging ink from each of the ink discharge ports
Second device having a plurality of energy generating elements for generating energy
Member , a supporting member for supporting the second member, and the supporting member
Supported by a member, the first member and the second member
And a pressure generating unit that generates the pressure
And each of the grooves corresponds to each of the energy generating elements.
The first member and the second member are pressed into contact with each other.
In the combined ink jet recording head, the pressing force generating unit is supported by the support member.
By applying a pressing force to the first member in the state.
To generate the pressure contact force, and
The pressing force on the first member while being supported by a member
An ink jet recording head capable of maintaining a state in which is released . 2. The ink jet recording head according to claim 1, wherein the pressing force generating unit presses against the first member.
It has a plurality of pressing parts for applying pressure, and the plurality of pressing parts
The pressing force is divided and applied, and the pressing force is independently applied to each pressing portion.
An ink jet recording head capable of holding a released state of pressing force . 3. The ink jet recording head according to claim 1, wherein said pressing force is generated using a spring force. 4. The ink jet recording head according to claim 1, wherein said pressing force is generated by tightening a screw.