Liquid dispensing head holding structure and packaging

Abstract

The liquid dispensing head is held inside the container. [Solution] The holding structure for the liquid dispensing head 10 is for housing and holding the liquid dispensing head 10, which has an integrated liquid tank for containing liquid, in a container 20 with an open top, and includes a first engaging portion 13 provided on the liquid dispensing head 10, and a second engaging portion 23 provided in the container 20 at a position facing the first engaging portion 13 when the liquid dispensing head 10 is housed therein, and which is capable of engaging with the first engaging portion 13.

Description

Technical Field

[0001] The present invention relates to a holding structure for a liquid ejection head and a package.

Background Art

[0002] A liquid ejection head integrally provided with a liquid tank may be removed from a liquid ejection device after use and recovered from an environmental protection perspective, and the liquid may be refilled and reused. Therefore, it is conceivable to accommodate and recover a used liquid ejection head in a packaging container at the time of shipment. However, in the case of a blister container that is often used as a packaging container for a liquid ejection head, once it is opened, it cannot be resealed. Therefore, even if a used liquid ejection head is accommodated and recovered in an opened blister container, the liquid ejection head may jump out of the container due to vibration during transportation, and the ejection port surface for ejecting the liquid may be damaged. On the other hand, Patent Document 1 describes a technique for suppressing the liquid ejection head from jumping out of the container during logistics by attaching an adhesive tape so as to straddle the opening surface of the container.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in recovering the liquid ejection head using an opened blister container, in order to utilize the technique described in Patent Document 1, it is necessary to include an adhesive tape in the blister container, which increases the number of parts. Therefore, an object of the present invention is to provide a holding structure for a liquid ejection head and a package that can hold the liquid ejection head in a container.

Means for Solving the Problems

[0005] To achieve the above-mentioned objectives, the liquid dispensing head holding structure of the present invention is a liquid dispensing head holding structure for housing and holding a liquid dispensing head, which integrally has a liquid tank for containing liquid, in a container with an open top, and comprises a first engaging portion provided on the liquid dispensing head and a second engaging portion provided in the container at a position facing the first engaging portion when the liquid dispensing head is housed therein, and which is capable of engaging with the first engaging portion. Furthermore, the packaging of the present invention comprises a liquid dispensing head having an integrated liquid tank for containing liquid, and a packaging container for housing the liquid dispensing head in a sealed state. The packaging container comprises a container body with an open top and a lid that is welded to the top surface of the container body to seal it. The liquid dispensing head is provided with a first engaging portion, and the container body is provided with a second engaging portion that is able to engage with the first engaging portion at a position opposite to the first engaging portion when the liquid dispensing head is housed in the packaging container. The first engaging portion and the second engaging portion are not engaged with each other when the liquid dispensing head is housed in the packaging container. [Effects of the Invention]

[0006] According to the present invention, a liquid dispensing head holding structure and packaging body can be obtained that can hold the liquid dispensing head inside a container. [Brief explanation of the drawing]

[0007] [Figure 1] This figure shows the holding structure of the liquid dispensing head according to the first embodiment. [Figure 2] This figure shows the holding structure for the liquid dispensing head according to the second embodiment. [Figure 3] This figure shows the holding structure for the liquid dispensing head according to the third embodiment. [Figure 4] This figure shows the holding structure for the liquid dispensing head according to the fourth embodiment. [Figure 5] This figure shows the holding structure for the liquid dispensing head according to the fifth embodiment. [Modes for carrying out the invention]

[0008] Embodiments of the present invention will be described below with reference to the drawings. In this specification, the liquid dispensing head holding structure of the present invention will be described using as an example a case in which a used liquid dispensing head is housed and held in the packaging container (specifically, a blister container) at the time of shipment, but the present invention is not limited thereto. The dimensions, materials, shapes, and relative arrangements of the components shown below may be appropriately changed depending on the configuration and various conditions of the liquid dispensing head and container to which the present invention is applied, and are not intended to limit the scope of the present invention.

[0009] (First embodiment) Figure 1(a) is a perspective view showing a holding structure for a liquid discharge head according to the first embodiment of the present invention, Figure 1(b) is a top view thereof, and Figure 1(c) is a perspective side view thereof. The liquid dispensing head 10 is detachably mounted on a liquid dispensing device and dispenses liquid such as ink to record images on a recording medium. It has an integrated liquid tank for containing the dispensed liquid. A new liquid dispensing head 10 is provided in the form of a package sealed in a packaging container. When in use, it is removed from the packaging container and attached to the liquid dispensing device. After the liquid tank is empty, the used liquid dispensing head 10 is removed from the liquid dispensing device and collected in the opened packaging container, i.e., the container body (container) 20 with the lid removed and the top open. At this time, the liquid dispensing head 10 is housed in the container 20 with the dispensing port surface 11, where the liquid dispensing port is formed, facing the bottom surface 21 of the container 20, and is collected while being held in the container 20 by a holding structure described later. The container 20 may be made of resin or paper.

[0010] As a holding structure for holding (fixing) the liquid dispensing head 10 in the container 20, the liquid dispensing head 10 is provided with a projection (first engaging portion) 13 that protrudes from the outer surface (hereinafter referred to as the "front surface") 12 adjacent to the dispensing port surface 11. On the other hand, the container 20 is provided with a cylindrical portion (second engaging portion) 23 that protrudes from the inner surface (hereinafter referred to as the "front inner surface") 22 facing the front surface 12 of the liquid dispensing head 10. The cylindrical portion 23 is provided at a position facing the projection 13 when the liquid dispensing head 10 is housed in the container 20, and is configured to be able to engage with the projection 13. Specifically, the projection 13 and the cylindrical portion 23 are configured such that at least one of them undergoes elastic deformation, causing the projection 13 to fit inside the cylindrical portion 23. The mutual fitting of the projection 13 and the cylindrical portion 23 allows the liquid dispensing head 10 to be housed and held (fixed) in the container 20 without the need for additional measures such as attaching adhesive tape. Therefore, even if it becomes necessary to transport the liquid dispensing head 10 that has been collected in the container 20, there is no risk of the liquid dispensing head 10 flying out of the container 20 due to vibrations during transport. As a result, for example, even if multiple containers 20 are packed in one bag to collect used liquid dispensing heads 10, it is possible to suppress damage to the dispensing port surface 11 by contact between the liquid dispensing head 10 and other liquid dispensing heads 10 or containers 20. Note that in the form of the packaging, that is, in the form in which a new liquid dispensing head 10 is housed in a sealed packaging container in which a film-like lid is welded to the top surface of the container 20, the projection 13 and the cylindrical portion 23 do not need to be fitted together.

[0011] The shapes of the projection 13 and the cylindrical portion 23 are not particularly limited as long as they can be fitted together. For example, the projection 13 may be cylindrical with a constant outer diameter, and accordingly, the cylindrical portion 23 may be cylindrical with a constant inner diameter greater than or equal to the outer diameter of the projection 13. However, in order to enhance the effect of preventing the projection 13 from coming off the cylindrical portion 23, the projection 13 and the cylindrical portion 23 preferably have the shapes shown in the figures. That is, a large-diameter portion 13a with a larger outer diameter than the other parts is formed on the tip side of the projection 13, and a small-diameter portion 23a with a smaller inner diameter than the other parts and a smaller inner diameter than the outer diameter of the large-diameter portion 13a of the projection 13 is formed on the tip side of the cylindrical portion 23. With such shapes, it is possible to prevent the projection 13 from coming off the cylindrical portion 23 when fitted into the cylindrical portion 23, and the liquid dispensing head 10 can be reliably fixed to the container 20 with the minimum necessary configuration. In addition, in order to obtain a similar effect of preventing coming off, the projection 13 and the cylindrical portion 23 may be able to engage with each other by a so-called snap-fit ​​shape. The arrangement of the projection 13 and the cylindrical portion 23 is not particularly limited, but it is preferable that the projection 13 is provided close to the discharge port surface 11 of the liquid discharge head 10, and therefore, it is preferable that the cylindrical portion 23 is provided close to the bottom surface 21 of the container 20. As a result, even if the liquid discharge head 10 vibrates inside the container 20 during transport, the projection 13 acts as a fulcrum for the vibration, so vibration is suppressed at the discharge port surface 11 close to it, and the risk of the discharge port surface 11 contacting and damaging the bottom surface 21 of the container 20 can be reduced.

[0012] (Second embodiment) Figure 2(a) is a perspective view showing the holding structure of a liquid discharge head according to the second embodiment of the present invention, Figure 2(b) is a top view thereof, and Figure 2(c) is a perspective side view thereof. The differences from the first embodiment will be described below. In this embodiment, multiple projections 13 and cylindrical portions 23 are provided. Specifically, the projections 13 are provided on a pair of outer surfaces 15 adjacent to the discharge port surface 11 of the liquid discharge head 10, and the cylindrical portions 23 are provided on a pair of inner surfaces 24 of the container 20 facing the outer surfaces 15. As a result, there are multiple (two in this embodiment) fixing points between the liquid discharge head 10 and the container 20, which helps to distribute external forces (such as vibrations) acting on the liquid discharge head 10 during transport and improves the durability of the projections 13 and cylindrical portions 23. In addition, the projections 13 and cylindrical portions 23 can each be made into simple shapes. Specifically, the projections 13 can be cylindrical with a constant outer diameter, and accordingly, the cylindrical portions 23 can be cylindrical with a constant inner diameter and a diameter greater than or equal to the outer diameter of the projections 13. Furthermore, preferably, the cylindrical portion 23 has a notch 23b formed along the axial direction with a width smaller than the outer diameter of the corresponding projection 13, opening toward the upper surface of the container 20. This improves the workability when fixing the liquid dispensing head 10 to the container 20, that is, the workability (ease of fitting) when fitting the projection 13 into the cylindrical portion 23, while ensuring a necessary and sufficient anti-loosening function. However, if the cylindrical portion 23 is easily deformed by the material of the container 20, the notch 23b does not need to be formed. On the other hand, in this embodiment as well, the engagement between the projection 13 and the cylindrical portion 23 may be achieved by a so-called snap-fit ​​shape.

[0013] In this embodiment, where there are multiple fitting points between the projection 13 and the cylindrical portion 23, the ease with which the projection 13 can be detached from the cylindrical portion 23 may differ at each fitting point in order to improve the workability when removing the liquid dispensing head 10 from the container 20. For this purpose, if the outer diameters of two projections 13 are the same, the inner diameters of the two cylindrical portions 23 may be made different. For example, the inner diameter of one cylindrical portion 23 may be equal to the outer diameter of the projection 13, while the inner diameter of the other cylindrical portion 23 may be larger than the outer diameter of the projection 13. As a result, the fitting strength with the projection 13 in the other cylindrical portion 23 becomes relatively weaker, making it easier for the projection 13 to detach from the cylindrical portion 23. Alternatively, if the inner diameters of the two cylindrical portions 23 are equal, the outer diameters of the two protrusions 13 may be different. For example, the outer diameter of one protrusion 13 may be equal to the inner diameter of the cylindrical portion 23, while the outer diameter of the other protrusion 13 may be smaller than the inner diameter of the cylindrical portion 23. This makes the fitting strength between the other protrusion 13 and the cylindrical portion 23 relatively weaker, making it easier for the protrusion 13 to detach from the cylindrical portion 23. In this way, compared to the case where the fitting strength between all protrusions 13 and cylindrical portions 23 is the same, the impact when removing the liquid dispensing head 10 from the container 20 can be reduced, and the risk of the liquid dispensing head 10 accidentally contacting and damaging the container 20 can be reduced.

[0014] The arrangement of the projection 13 and the cylindrical portion 23 is not particularly limited, but from the same viewpoint as in the first embodiment, it is preferable that the projection 13 is provided close to the front surface 12 of the liquid dispensing head 10 (an outer surface other than the outer surface 15 on which the projection 13 is provided). As a result, during transport, the projection 13 acts as a fulcrum for vibration, so vibration is suppressed on the front surface 12 of the liquid dispensing head 10 that is close to it, and the possibility that the connection terminal 14 provided thereon will come into contact with the front inner surface 22 of the container 20 and be damaged is reduced. Furthermore, the number of projections 13 is not limited to two (a pair), but may be three or more, and accordingly, the number of cylindrical portions 23 is not limited to two (a pair), but may be three or more.

[0015] (Third embodiment) Fig. 3(a) is a top view showing the holding structure of the liquid ejection head according to the third embodiment of the present invention, and Fig. 3(b) is a perspective side view thereof. Hereinafter, the description will be centered on the differences from the first embodiment. In the present embodiment, two protrusions 13 are provided on the front surface 12 of the liquid ejection head 10, whereas a block portion (second engaging portion) 25 is provided in the container 20 instead of the cylindrical portion 23 of the first embodiment. The block portion 25 is provided along the lateral direction of the front inner surface 22 of the container 20, and is configured such that when the liquid ejection head 10 is housed in the container 20, the protrusions 13 abut against and engage with the lower surface of the block portion 25. With such a configuration, similarly to the first embodiment, the liquid ejection head 10 can be housed and held (fixed) in the container 20. In the illustrated example, only one block portion 25 is provided, but it may be divided into two in the lateral direction of the front inner surface 22 according to the number of the protrusions 13. Further, the number of the protrusions 13 is not limited to two shown in the figure, and three or more may be provided at intervals in the lateral direction of the front surface 12 of the liquid ejection head 10, and correspondingly, three or more block portions 25 may be provided.

[0016] (Fourth Embodiment) Fig. 4(a) is a top view showing the holding structure of the liquid ejection head according to the fourth embodiment of the present invention, and Fig. 4(b) is a perspective side view thereof. Hereinafter, the description will be centered on the differences from the first embodiment. In the present embodiment, contrary to the first embodiment, a circular hole portion (first engaging portion) 16 corresponding to the cylindrical portion 23 of the first embodiment is provided in the liquid ejection head 10, and a protrusion (second engaging portion) 26 is provided in the container 20. The hole portion 16 is provided at the position where the protrusion 13 was provided in the first embodiment, that is, on the front surface 12 of the liquid ejection head 10. Further, the protrusion 26 is provided at the position where the cylindrical portion 23 was provided in the first embodiment, that is, on the front inner surface 22 of the container 20. Then, by elastically deforming the protrusion 26 and fitting it into the hole portion 16, the liquid ejection head 10 can be fixed to the container 20 similarly to the first embodiment. Also in the present embodiment, in order to enhance the retaining effect of the protrusion 26 with respect to the hole 16, preferably, a configuration similar to that of the first embodiment is provided. That is, on the opening side of the hole 16, a small-diameter portion 16a having an inner diameter smaller than that of other portions is formed, and on the tip side of the protrusion 26, a large-diameter portion 26a having an outer diameter larger than that of other portions and an outer diameter larger than the inner diameter of the small-diameter portion 16a of the hole 16 is formed. Further, it is also the same as in the first embodiment that the hole 16 and the protrusion 26 may be engaged with each other in a so-called snap-fit shape, and the preferred arrangement of the hole 16 and the protrusion 26 is also the same as the preferred arrangement of the protrusion 13 and the cylindrical portion 23 in the first embodiment.

[0017] (Fifth Embodiment) FIG. 5(a) is a top view showing a holding structure of a liquid ejection head according to a fifth embodiment of the present invention, and FIG. 5(b) is a perspective side view thereof. Hereinafter, the description will focus on the differences from the second embodiment. In the present embodiment, contrary to the second embodiment, a hole (first engaging portion) 16 corresponding to the cylindrical portion 23 of the second embodiment is provided in the liquid ejection head 10, and a protrusion (second engaging portion) 26 is provided in the container 20. The hole 16 is provided at the position where the protrusion 13 was provided in the second embodiment, that is, on each of the pair of outer surfaces 15 of the liquid ejection head 10. Further, the protrusion 26 is provided at the position where the cylindrical portion 23 was provided in the second embodiment, that is, on each of the pair of inner surfaces 24 of the container 20. Then, by elastically deforming the protrusion 26 and fitting it into the hole 16, the liquid ejection head 10 can be fixed to the container 20 at a plurality of locations, similar to the second embodiment. In the present embodiment, the hole 16 is a simple circular hole, but the length of the protrusion 26 is preferably such that a part of it enters the hole 16. In this embodiment as well, similar to the second embodiment, the ease with which the projection 26 can be dislodged from the hole 16 may be varied for each fitting point between the hole 16 and the projection 26. That is, if the inner diameters of the two holes 16 are equal, for example, the outer diameter of one projection 26 may be made equal to the inner diameter of the hole 16, while the outer diameter of the other projection 26 may be made smaller than the inner diameter of the hole 16. Alternatively, if the outer diameters of the two projections 26 are equal, for example, the inner diameter of one hole 16 may be made equal to the outer diameter of the projection 26, while the inner diameter of the other hole 16 may be made larger than the outer diameter of the projection 26. Also, similar to the second embodiment, the hole 16 and the projection 26 may be able to engage with each other in a so-called snap-fit ​​shape, and the preferred arrangement of the hole 16 and the projection 26 is the same as the preferred arrangement of the projection 13 and the cylindrical portion 23 in the second embodiment.

[0018] The disclosure of this embodiment includes the following structure and configuration. (Structure 1) A liquid dispensing head holding structure for housing and holding a liquid dispensing head, which has an integrated liquid tank for containing liquid, in a container with an open top, A first engaging portion provided on the liquid dispensing head, A liquid dispensing head holding structure comprising: a second engaging portion provided in the container at a position facing the first engaging portion when the liquid dispensing head is housed therein, and which is capable of engaging with the first engaging portion. (Structure 2) The liquid dispensing head is housed in the container such that the dispensing surface, which has a dispensing port for dispensing liquid, faces the bottom surface of the container. The liquid discharge head holding structure according to structure 1, wherein the first engaging portion is provided in close proximity to the discharge port surface of the liquid discharge head. (Structure 3) The first engaging portion is a projection that protrudes from the outer surface adjacent to the discharge port surface of the liquid discharge head, and the second engaging portion is a cylindrical portion that protrudes from the inner surface of the container facing the outer surface of the liquid discharge head. The liquid dispensing head is held in the container by the projection fitting inside the cylindrical portion, as described in Structure 2. (Structure 4) The liquid dispensing head holding structure according to structure 3, wherein multiple projections and cylindrical portions are provided for each. (Structure 5) The plurality of protrusions include a pair of protrusions provided on a pair of outer surfaces adjacent to the discharge port surface of the liquid discharge head, The liquid dispensing head holding structure according to structure 4, wherein the plurality of cylindrical portions include a pair of cylindrical portions provided on a pair of inner surfaces of the container that are opposite to the pair of outer surfaces of the liquid dispensing head. (Structure 6) The liquid discharge head holding structure according to structure 5, wherein the pair of protrusions are provided in close proximity to an outer surface of the liquid discharge head that is adjacent to the discharge port surface and is separate from the pair of outer surfaces. (Structure 7) The liquid dispensing head holding structure according to structure 5 or 6, wherein the cylindrical portion has a notch formed in the axial direction with a width smaller than the outer diameter of the corresponding projection, and the notch opens toward the upper surface of the container. (Structure 8) A liquid dispensing head holding structure according to any one of structures 5 to 7, wherein when the outer diameters of the pair of protrusions are equal, the inner diameters of the pair of cylindrical portions are different from each other, and when the inner diameters of the pair of cylindrical portions are equal, the outer diameters of the pair of protrusions are different from each other. (Structure 9) A liquid discharge head holding structure according to structure 3, wherein a large-diameter portion with a larger outer diameter than the other portion is formed on the tip side of the projection, and a small-diameter portion with a smaller inner diameter than the other portion and a smaller inner diameter than the outer diameter of the large-diameter portion of the projection is formed on the tip side of the cylindrical portion. (Structure 10) The first engaging portion is a hole provided on the outer surface of the liquid dispensing head adjacent to the dispensing port surface, and the second engaging portion is a projection protruding from the inner surface of the container facing the outer surface of the liquid dispensing head. The liquid dispensing head is held in the container by the projection fitting into the hole, as described in Structure 2. (Structure 11) The liquid dispensing head holding structure according to structure 10, wherein multiple holes and protrusions are provided for each. (Structure 12) The plurality of holes include a pair of holes provided on a pair of outer surfaces adjacent to the discharge port surface of the liquid discharge head, The liquid dispensing head holding structure according to structure 11, wherein the plurality of protrusions include a pair of protrusions provided on a pair of inner surfaces of the container that are opposite to the pair of outer surfaces of the liquid dispensing head. (Structure 13) The liquid discharge head holding structure according to structure 12, wherein the pair of protrusions are provided in close proximity to an outer surface of the liquid discharge head that is adjacent to the discharge port surface and is separate from the pair of outer surfaces. (Structure 14) A liquid discharge head holding structure according to structure 12 or 13, wherein when the inner diameters of the pair of holes are equal, the outer diameters of the pair of protrusions are different from each other, and when the outer diameters of the pair of protrusions are equal, the inner diameters of the pair of holes are different from each other. (Structure 15) A liquid discharge head holding structure according to structure 10, wherein a small-diameter portion with a smaller inner diameter than the other portion is formed on the opening side of the hole portion, and a large-diameter portion with a larger outer diameter than the other portion and a larger outer diameter than the inner diameter of the small-diameter portion of the hole portion is formed on the tip side of the projection portion. (Structure 16) The first engaging portion is a projection that protrudes from the outer surface adjacent to the discharge port surface of the liquid discharge head, and the second engaging portion is a block that protrudes from the inner surface of the container facing the outer surface of the liquid discharge head. The liquid dispensing head holding structure according to structure 2, wherein the protrusion abuts against and engages with the lower surface of the block portion, thereby holding the liquid dispensing head in the container. (Structure 17) The liquid dispensing head holding structure according to structure 16, wherein the projections are provided in multiple locations at intervals in the lateral direction on the outer surface of the liquid dispensing head, and at least one block portion is provided along the lateral direction on the inner surface of the container. (Composition 1) It comprises a liquid dispensing head having an integrated liquid tank for containing liquid, and a packaging container that houses the liquid dispensing head in a sealed state, The aforementioned packaging container has a container body with an open top and a lid that is welded to the top surface of the container body to seal the container body. The liquid dispensing head is provided with a first engagement portion, The container body is provided with a second engaging portion that is capable of engaging with the first engaging portion, at a position facing the first engaging portion when the liquid dispensing head is housed therein. A packaging body in which the first engaging portion and the second engaging portion are not engaged with each other when the liquid dispensing head is housed in the packaging container. [Explanation of Symbols]

[0019] 10 Liquid dispensing heads 20 containers 13,26 Protrusion 16 Hole 23 Cylinder part

Claims

1. A liquid dispensing head holding structure for housing and holding a liquid dispensing head, which has an integrated liquid tank for containing liquid, in a container with an open top, The first engaging portion provided on the liquid dispensing head, A liquid dispensing head holding structure comprising: a second engaging portion provided in the container at a position facing the first engaging portion when the liquid dispensing head is housed therein, and which is capable of engaging with the first engaging portion.

2. The liquid dispensing head is housed in the container such that the dispensing surface, which has a dispensing port for dispensing liquid, faces the bottom surface of the container. The liquid dispensing head holding structure according to claim 1, wherein the first engaging portion is provided in close proximity to the dispensing port surface of the liquid dispensing head.

3. The first engaging portion is a projection that protrudes from the outer surface adjacent to the discharge port surface of the liquid discharge head, and the second engaging portion is a cylindrical portion that protrudes from the inner surface of the container facing the outer surface of the liquid discharge head. The liquid dispensing head is held in the container by the projection fitting inside the cylindrical portion, as described in claim 2.

4. The liquid dispensing head holding structure according to claim 3, wherein multiple projections and cylindrical portions are provided.

5. The plurality of protrusions include a pair of protrusions provided on a pair of outer surfaces adjacent to the discharge port surface of the liquid discharge head, The liquid dispensing head holding structure according to claim 4, wherein the plurality of cylindrical portions include a pair of cylindrical portions provided on a pair of inner surfaces of the container that are opposite to the pair of outer surfaces of the liquid dispensing head.

6. The liquid dispensing head holding structure according to claim 5, wherein the pair of protrusions are provided in close proximity to an outer surface of the liquid dispensing head that is adjacent to the dispensing port surface and is separate from the pair of outer surfaces.

7. The liquid dispensing head holding structure according to claim 5 or 6, wherein the cylindrical portion has a notch formed in the axial direction with a width smaller than the outer diameter of the corresponding projection, and which opens toward the upper surface of the container.

8. The liquid dispensing head holding structure according to claim 5 or 6, wherein when the outer diameters of the pair of protrusions are equal, the inner diameters of the pair of cylindrical portions are different from each other, and when the inner diameters of the pair of cylindrical portions are equal, the outer diameters of the pair of protrusions are different from each other.

9. The liquid dispensing head holding structure according to claim 3, wherein a large-diameter portion is formed on the tip side of the projection, having a larger outer diameter than the other parts, and a small-diameter portion is formed on the tip side of the cylindrical portion, having a smaller inner diameter than the other parts and a smaller inner diameter than the outer diameter of the large-diameter portion of the projection.

10. The first engaging portion is a hole provided on the outer surface of the liquid dispensing head adjacent to the dispensing port surface, and the second engaging portion is a projection protruding from the inner surface of the container facing the outer surface of the liquid dispensing head. The liquid dispensing head is held in the container by the projection fitting into the hole, as described in claim 2.

11. The liquid dispensing head holding structure according to claim 10, wherein multiple holes and projections are provided.

12. The plurality of holes include a pair of holes provided on a pair of outer surfaces adjacent to the discharge port surface of the liquid discharge head, The liquid dispensing head holding structure according to claim 11, wherein the plurality of protrusions include a pair of protrusions provided on a pair of inner surfaces of the container that are opposite to the pair of outer surfaces of the liquid dispensing head.

13. The liquid dispensing head holding structure according to claim 12, wherein the pair of protrusions are provided in close proximity to an outer surface of the liquid dispensing head that is adjacent to the discharge port surface and is separate from the pair of outer surfaces.

14. The liquid dispensing head holding structure according to claim 12 or 13, wherein when the inner diameters of the pair of holes are equal, the outer diameters of the pair of protrusions are different from each other, and when the outer diameters of the pair of protrusions are equal, the inner diameters of the pair of holes are different from each other.

15. A liquid discharge head holding structure according to claim 10, wherein a small-diameter portion with a smaller inner diameter than the other portion is formed on the opening side of the hole portion, and a large-diameter portion with a larger outer diameter than the other portion and a larger outer diameter than the inner diameter of the small-diameter portion of the hole portion is formed on the tip side of the projection portion.

16. The first engaging portion is a projection that protrudes from the outer surface adjacent to the discharge port surface of the liquid discharge head, and the second engaging portion is a block that protrudes from the inner surface of the container facing the outer surface of the liquid discharge head. The liquid dispensing head holding structure according to claim 2, wherein the projection abuts against and engages with the lower surface of the block portion, thereby holding the liquid dispensing head in the container.

17. The liquid dispensing head holding structure according to claim 16, wherein the projections are provided in multiple locations at intervals in the lateral direction on the outer surface of the liquid dispensing head, and at least one block portion is provided along the lateral direction on the inner surface of the container.

18. It comprises a liquid dispensing head having an integrated liquid tank for containing liquid, and a packaging container that houses the liquid dispensing head in a sealed state, The aforementioned packaging container has a container body with an open top and a lid that is welded to the top surface of the container body to seal the container body. The liquid dispensing head is provided with a first engagement portion, The container body is provided with a second engaging portion that is capable of engaging with the first engaging portion, at a position facing the first engaging portion when the liquid dispensing head is housed therein. A packaging body in which the first engaging portion and the second engaging portion are not engaged with each other when the liquid dispensing head is housed in the packaging container.

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