Discharge head and discharge device

Abstract

To provide a discharge head capable of equalizing force acting on a plurality of stems.SOLUTION: A discharge head 6 is detachably provided at an aerosol can capable of discharging an individual content from a first stem and a second stem, for pushing the first stem and the second stem down and allowing the content to be discharged. The discharge head 6 comprises a frame part 62 attachable to the aerosol can, a nozzle 61 provided movably with respect to the frame part 62, for pushing the first stem and the second stem down when moved downwardly and an operation piece 66 formed at the nozzle 61 and operated by a user in moving the nozzle 61 downwardly. The operation piece 66 has a touch surface 66a to be touched when operated by the user and the touch surface 66a is formed to project upwardly.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a discharge head and a discharge device.

Background Art

[0002] Conventionally, a two-liquid discharger in which a discharge head is attached to an aerosol can is known (see, for example, Patent Document 1). The aerosol can has two stems and is configured to discharge individual contents from each stem. The discharge head is for depressing the two stems to discharge the contents.

[0003] The discharge head includes a frame portion attachable to the aerosol can, a nozzle provided movably with respect to the frame portion and configured to depress a plurality of stems when moved downward, and an operation piece operated by a user when moving the nozzle downward. The nozzle is provided with passages for the contents from the two stems, and is configured such that the contents passing through the passages are discharged from the discharge port.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Here, for example, when an end portion in the width direction of the operation piece is operated by a user, variation occurs in the force acting on two stems arranged in the width direction of the operation piece via the nozzle, so that the discharge amounts of the contents from the two stems may vary.

[0006] The present invention has been made to solve the above problems, and an object of the present invention is to provide a discharge head and a discharge device capable of equalizing the forces acting on a plurality of stems. [Means for solving the problem]

[0007] The discharge head according to the present invention is detachably mounted on a container having multiple stems from which individual contents can be discharged, and is designed to push down the multiple stems to discharge the contents. The discharge head comprises a frame that can be attached to the container, a nozzle that is movable relative to the frame and configured to push down the multiple stems when moved downward, and an operating piece formed on the nozzle that is operated by the user when the nozzle is moved downward. The nozzle is provided with passages for the contents from the multiple stems, and is configured so that the contents that pass through the passages are discharged from the discharge port. The operating piece has a contact surface that is contacted when the user operates it, and the contact surface is formed in an upward projection shape.

[0008] In the above-described discharge head, the contact surface may be a curved surface.

[0009] In a discharge head where the contact surface is a curved surface, when the frame is attached to the container, multiple stems are arranged in the width direction of the operating piece, and the contact surface may be curved such that the central part is located above both ends in the width direction.

[0010] In a discharge head where the contact surface is a curved surface, the nozzle and the operating piece are arranged adjacent to each other in the front-rear direction, the operating piece is positioned behind the nozzle, and the contact surface may be curved such that it is located lower as it moves towards the rear in the front-rear direction.

[0011] In the above-described discharge head, the contact surface may be composed of a collection of polygons.

[0012] In the discharge head in which the contact surface is composed of a collection of polygons, when the frame is attached to the container, multiple stems are arranged in the width direction of the operating piece, and the contact surface may have its central part positioned above both ends in the width direction.

[0013] In a discharge head in which the contact surface is composed of a collection of polygons, the nozzle and the operating piece are arranged adjacent to each other in the front-rear direction, the operating piece is positioned behind the nozzle, and the contact surface may be positioned lower as it moves towards the rear in the front-rear direction.

[0014] In the discharge head described above, the frame portion has a pair of vertical walls arranged opposite each other with the operating piece in between, and the upper ends of the pair of vertical walls may be positioned above the contact surface of the operating piece.

[0015] The dispensing device according to the present invention comprises a container having a plurality of stems configured to dispense individual contents from each stem, and a dispensing head detachably attached to the container for pushing down the plurality of stems to dispense the contents. The dispensing head is the dispensing head described above. [Effects of the Invention]

[0016] According to the discharge head and discharge device of the present invention, it is possible to equalize the force acting on multiple stems. [Brief explanation of the drawing]

[0017] [Figure 1] This is an exploded perspective view showing the two-liquid dispenser according to this embodiment. [Figure 2] This is a view of the two-liquid dispenser shown in Figure 1 from a different angle. [Figure 3] Figure 1 is a plan view showing the discharge head of a two-component dispenser. [Figure 4] Figure 3 is a perspective view showing the nozzle cover of the discharge head in the open position. [Figure 5] This is a view of the discharge head shown in Figure 4 from a different angle. [Figure 6] Figure 4 is a plan view of the discharge head. [Figure 7] This is a cross-sectional view of the two-component dispenser according to this embodiment, taken along line AA in Figure 6. [Figure 8] Figure 3 is a cross-sectional view of the operating piece of the discharge head, cut along the width direction. [Figure 9] This is a photograph showing the discharge head of the example and the discharge head of the comparative example. [Figure 10] This is a photograph showing the equipment used in instrumental analysis. [Figure 11] This is a photograph showing the state where the widthwise end of the operating piece in the discharge head of the comparative example is pressed down. [Figure 12] This is a photograph showing the state where the widthwise end of the operating piece in the discharge head of the example is pressed down. [Figure 13] This is a graph showing the force acting on the first stem and the force acting on the second stem when the widthwise end of the operating piece is pressed down in the discharge head of the comparative example. [Figure 14] This is a graph showing the force acting on the first stem and the force acting on the second stem when the widthwise end of the operating piece is pressed down in the discharge head of the example. [Figure 15] This is a perspective view showing the discharge head according to the first modification of the present embodiment. [Figure 16] This is a view of the discharge head in FIG. 15 seen from the rear side. [Figure 17] This is a perspective view showing the discharge head according to the second modification of the present embodiment. [Figure 18] This is a view of the discharge head in FIG. 17 seen from the rear side. [Figure 19] This is a perspective view showing the discharge head according to the third modification of the present embodiment. [Figure 20] This is a view of the discharge head in FIG. 19 seen from the rear side.

Mode for Carrying Out the Invention

[0018] Hereinafter, an embodiment of the present invention will be described.

[0019] First, referring to FIGS. 1 to 8, the structure of the two-liquid discharger 1 according to an embodiment of the present invention will be described.

[0020] As shown in Figures 1 and 2, the two-component dispenser 1 comprises an aerosol can 2 and a nozzle unit 3, with the nozzle unit 3 attached to the aerosol can 2. The two-component dispenser 1 is an example of the "dispensing device" of the present invention, and the aerosol can 2 is an example of the "container" of the present invention.

[0021] The aerosol can 2 is cylindrical in shape and contains, for example, two types of contents. Inside the aerosol can 2, a first container containing a first agent (contents) that includes, for example, an alkaline agent and dye for hair dyeing, and a second container containing a second agent (contents) that includes an oxidizing agent for hair dyeing, are arranged adjacent to each other. For example, the first and second containers are pouch containers.

[0022] A valve 4 is provided at one end (upper end) of the aerosol can 2 in the direction (Z direction) along the central axis 100. The valve 4 is configured to be switchable between a closed state in which the two types of contents of the aerosol can 2 are not dispensed, and an open state in which the two types of contents of the aerosol can 2 are dispensed individually.

[0023] Valve 4 includes a valve body 41, a first stem 42, and a second stem 43. The first stem 42 and the second stem 43 have passages for discharging contents and are arranged adjacent to each other in the lateral direction (X direction). The first stem 42 and the second stem 43 are provided to be vertically movable relative to the valve body 41. The first stem 42 is connected to the first container, and the second stem 43 is connected to the second container. Therefore, when the first stem 42 is pushed down, the contents of the first container are discharged from the first stem 42, and when the second stem 43 is pushed down, the contents of the second container are discharged from the second stem 43. Note that the first stem 42 and the second stem 43 are examples of "stems" in the present invention.

[0024] The nozzle unit 3 is designed to receive user input and dispense the contents of the aerosol can 2. The nozzle unit 3 consists of two parts: a base 5 and a dispensing head 6.

[0025] The base 5 is detachably mounted on one end of the aerosol can 2 in a direction along the central axis 100, such that the first stem 42 and second stem 43 of the valve 4 are exposed. The base 5 has a double-cylinder structure and includes an inner cylinder portion 51 and an outer cylinder portion 52 that are spaced apart in a concentric circle, and a connecting portion 53 (see Figure 7) that connects the inner cylinder portion 51 and the outer cylinder portion 52.

[0026] The inner cylinder portion 51 is formed in a cylindrical shape extending in the vertical direction (Z direction), and its inner circumferential surface is configured to be attachable to the valve body 41 of the valve 4 of the aerosol can 2. The upper end of the inner cylinder portion 51 is provided with a top plate portion 51c having an oval-shaped hole 51b in the center. The outer cylinder portion 52 is missing a portion of its circumferential region (one side in the Y direction), and is therefore an incomplete cylinder. The connecting portion 53 is configured to connect the lower end of the inner cylinder portion 51 and the lower end of the outer cylinder portion 52.

[0027] When the base 5 is attached to the aerosol can 2, the first stem 42 and second stem 43 of the aerosol can 2 protrude from the oval-shaped hole 51b of the top plate portion 51c, and the outer surface of the outer cylinder portion 52 is flush with the outer surface of the aerosol can 2.

[0028] Furthermore, movable pieces 521 are provided at two opposing locations in the lateral direction (X direction) of the outer cylinder portion 52. The movable pieces 521 are formed in the shape of an elastically deformable tongue, and two protrusions 522 and 523 extending parallel to the circumferential direction are provided at their upper ends. The protrusions 522 and 523 are formed to protrude radially outward, with the protrusion 522 positioned above the protrusion 523. The bridging portion 622 of the discharge head 6, described later, is fitted between the protrusions 522 and 523, thereby connecting the base 5 and the discharge head 6. When the movable piece 521 is elastically deformed radially inward, the engagement between the protrusion 522 and the bridging portion 622 is released, allowing the base 5 and the discharge head 6 to be separated.

[0029] The discharge head 6 is detachably attached to the upper part of the base 5 and has a nozzle 61 and a frame 62. That is, the discharge head 6 is detachably provided to the aerosol can 2 via the base 5. The nozzle 61 is cantilevered to the first connecting portion 62c1 of the frame 62, which will be described later, via an elastic arm 65 (see Figure 4). For this reason, the nozzle 61 is provided so as to be movable in the vertical direction (Z direction) relative to the frame 62.

[0030] The nozzle 61 is connected to the first stem 42 and the second stem 43 of the aerosol can 2, and a passage is provided for combining and discharging the contents from the first stem 42 and the contents from the second stem 43. As shown in Figure 7, this passage consists of a first downward-opening recess 61a, a second downward-opening recess 61b, a first vertical hole 61c, a second vertical hole 61d, a confluence section 61f, and a horizontal hole 61e.

[0031] The first downward-opening recess 61a and the second downward-opening recess 61b are located on the underside of the portion of the nozzle 61 that connects to the elastic arm 65. The first downward-opening recess 61a and the second downward-opening recess 61b are spaced apart in the width direction (X direction) of the nozzle 61. The first downward-opening recess 61a is configured to fit with the first stem 42, and the second downward-opening recess 61b is configured to fit with the second stem 43. Therefore, when the nozzle 61 is moved downward, it is configured to push down the first stem 42 and the second stem 43.

[0032] The first vertical hole 61c and the second vertical hole 61d (see Figure 6) are located between the first downward-opening recess 61a and the second downward-opening recess 61b and the confluence section 61f. The first vertical hole 61c connects the first downward-opening recess 61a and the confluence section 61f, while the second vertical hole 61d connects the second downward-opening recess 61b and the confluence section 61f. The confluence section 61f is located above the portion of the nozzle 61 that is connected to the elastic arm 65, and is located between the first vertical hole 61c and the second vertical hole 61d and the horizontal hole 61e.

[0033] The lateral hole 61e is formed to extend in the front-rear direction (Y direction). One end (rear side) of the lateral hole 61e faces the confluence section 61f, and the other end (front side) is open to the outside. In other words, the other end (outer opening) of the lateral hole 61e is an outlet for confluence of the two types of contents and discharged to the outside.

[0034] Furthermore, an operating piece 66 is formed at the rear end of the nozzle 61, which is operated by the user when moving the nozzle 61 downwards. Details of the operating piece 66 will be described later.

[0035] A nozzle cover 63 for opening and closing the confluence section 61f is provided via a hinge 64 at the upper part of the nozzle 61 where it is connected to the elastic arm 65. The nozzle cover 63 is rotated so as to bend backward on the hinge 64 as a pivot point to close the confluence section 61f, while it is rotated so as to be pulled forward on the hinge 64 as a pivot point to open the confluence section 61f.

[0036] The nozzle cover 63 is provided with a protrusion 631 and a locking piece 632. The protrusion 631 is formed to fit into the confluence portion 61f when the nozzle cover 63 is closed. The locking piece 632 is provided to maintain the closed state of the nozzle cover 63 by engaging with the protruding portion 633 (see Figure 5) provided on the nozzle 61 when the nozzle cover 63 is closed.

[0037] The frame portion 62 can be attached to the aerosol can 2 via the base 5 and movably supports the nozzle 61. As shown in Figure 3, the frame portion 62 has a first vertical wall portion 62a and a second vertical wall portion 62b. The first vertical wall portion 62a and the second vertical wall portion 62b are arranged to face each other in the lateral direction (X direction), sandwiching the nozzle 61 and the operating piece 66. Note that the first vertical wall portion 62a and the second vertical wall portion 62b are examples of the "vertical wall portion" of the present invention.

[0038] The first vertical wall portion 62a has an inner surface 62a1 perpendicular to the lateral direction, and the inner surface 62a1 is spaced apart from the nozzle 61 and the operating piece 66. The second vertical wall portion 62b has an inner surface 62b1 perpendicular to the lateral direction, and the inner surface 62b1 is spaced apart from the nozzle 61 and the operating piece 66. The first vertical wall portion 62a and the second vertical wall portion 62b are connected by a first connecting portion 62c1 and a second connecting portion 62c2.

[0039] The first connecting portion 62c1 is configured to connect the lower end of the first vertical wall portion 62a and the lower end of the second vertical wall portion 62b on the front side (left side in Figure 3). The second connecting portion 62c2 is configured to connect the lower end of the first vertical wall portion 62a and the lower end of the second vertical wall portion 62b on the rear side (right side in Figure 3). An elastic arm 65 is formed on the first connecting portion 62c1, as shown in Figure 7. The elastic arm 65 is formed to extend diagonally upward toward the rear from the first connecting portion 62c1, and its rear end (upper end) is connected to the nozzle 61.

[0040] Furthermore, the first vertical wall portion 62a and the second vertical wall portion 62b are higher than the upper ends of the nozzle 61 and the operating piece 66. The outer surfaces of the first vertical wall portion 62a and the second vertical wall portion 62b (see Figures 1 and 2) are formed in a rounded shape so as to be flush with the outer peripheral surface of the outer cylindrical portion 52 of the base 5.

[0041] Furthermore, engagement holes 621 are provided at the lower ends of the outer surfaces of the first vertical wall portion 62a and the second vertical wall portion 62b, and a bridging portion 622 is formed below the engagement holes 621. These engagement holes 621 are formed to extend in the circumferential direction and are configured to allow the protruding portion 522 of the movable piece 521 to be fitted into them.

[0042] [Operation piece] The operating piece 66 is a plate-shaped body that protrudes rearward from the nozzle 61. Therefore, as shown in Figure 3, the nozzle 61 and the operating piece 66 are arranged adjacent to each other in the front-rear direction (Y direction), with the operating piece 66 positioned rearward relative to the nozzle 61. Also, as shown in Figure 7, the first stem 42 and the second stem 43 are positioned between the operating piece 66 and the elastic arm 65 in the front-rear direction. Therefore, when the operating piece 66 is pushed down by the user, the portion of the nozzle 61 connected to the elastic arm 65 is pushed down, which in turn pushes down the first stem 42 and the second stem 43.

[0043] Here, the operating piece 66 has a contact surface 66a that is contacted by the user when operating it, and the contact surface 66a is formed in an upward projection shape. The contact surface 66a is a curved surface. Specifically, as shown in Figure 8, the contact surface 66a is curved such that the central part is located above both ends in the width direction (X direction) of the operating piece 66. That is, the contact surface 66a is curved so that it is located downward as it moves from the center in the width direction towards the ends. In other words, the operating piece 66 has a contact surface 66a that is curved in an arc shape such that the thickness gradually decreases as it moves from the center in the width direction towards both ends.

[0044] Furthermore, as shown in Figure 7, the rear end of the contact surface 66a is curved so that it is located lower as it moves towards the rear in the front-rear direction. In other words, the operating piece 66 has an arc-shaped curved contact surface 66a such that its thickness gradually decreases as it moves towards the rear end in the front-rear direction.

[0045] As shown in Figure 3, the operating piece 66 is positioned between the first vertical wall portion 62a and the second vertical wall portion 62b. The rear end of the operating piece 66 is formed in an arc shape when viewed in plan and is positioned inward (forward) relative to the outer circumference of the second connecting portion 62c2. As shown in Figure 7, the contact surface 66a of the operating piece 66 is positioned below the upper ends of the first vertical wall portion 62a and the second vertical wall portion 62b. Furthermore, when the frame portion 62 is attached to the aerosol can 2 via the base 5, the first stem 42 and the second stem 43 are arranged in the width direction of the operating piece 66.

[0046] -Installation Procedure- Next, with reference to Figure 1, the procedure for attaching the nozzle unit 3 to the aerosol can 2 will be described.

[0047] First, the base 5 (see Figure 1) of the nozzle unit 3 is attached to the aerosol can 2 (see Figure 1). Specifically, the inner cylinder portion 51 of the base 5 is fitted onto the valve body 41 of the valve 4 of the aerosol can 2. Next, the dispensing head 6 (see Figure 1) is attached to the base 5. Specifically, the user pushes the movable piece 521 of the base 5 radially inward, causing the movable piece 521 to elastically deform radially inward, and the dispensing head 6 is fitted onto the base 5. Then, when the elastic deformation of the movable piece 521 is released, the protruding portion 522 of the movable piece 521 is fitted into the engagement hole 621. That is, the dispensing head 6 is attached to the base 5 by the engagement of the protruding portion 522 with the bridging portion 622.

[0048] -Operation during use- Next, with reference to Figure 7, the operation of the two-liquid dispenser 1 will be explained.

[0049] When the operating piece 66 of the discharge head 6 (see Figure 7) is pressed down by the user, the operating piece 66 and the nozzle 61 move downward (tilt) with the first connecting portion 62c1 of the frame portion 62 as a pivot point, causing the nozzle 61 to press down the first stem 42 and the second stem 43 of the aerosol can 2. As a result, two types of contents from the aerosol can 2 are discharged simultaneously from the first stem 42 and the second stem 43. The contents from the first stem 42 flow into the confluence portion 61f via the first vertical hole 61c, and the contents from the second stem 43 flow into the confluence portion 61f via the second vertical hole 61d. The two types of contents that have merged at the confluence portion 61f flow into the horizontal hole 61e and are discharged from the outer opening of the horizontal hole 61e (the discharge port of the nozzle 61). In other words, the contents from the first stem 42 and the second stem 43 pass through the passage of the nozzle 61 and are discharged from the discharge port.

[0050] -Cleaning Procedure- Next, the procedure for cleaning the nozzle 61 will be described with reference to Figures 1 and 5-7.

[0051] First, the discharge head 6 (see Figure 1) is removed from the base 5 (see Figure 1). Specifically, when the user pushes the movable piece 521 of the base 5 radially inward, the movable piece 521 elastically deforms radially inward, releasing the engagement between the protruding portion 522 and the bridging portion 622, and in this state, the discharge head 6 is pulled upward away from the base 5. Next, the nozzle cover 63 is rotated around the hinge 64 as a pivot point, opening the confluence portion 61f as shown in Figure 5. In this state, the confluence portion 61f, the first vertical hole 61c (see Figure 6), the second vertical hole 61d (see Figure 6), the first downward-opening recess 61a (see Figure 7), the second downward-opening recess 61b (see Figure 7), and the horizontal hole 61e are washed with water or the like. This makes it possible to easily wash away the two types of contents adhering to them. Note that the nozzle 61 cleaning operation may also be performed with the discharge head 6 attached to the base 5.

[0052] -effect- In this embodiment, as described above, the contact surface 66a of the operating piece 66 is curved in a protruding shape, so that the force applied by the user to push down the operating piece 66 acts in the direction normal to the contact surface 66a. This makes it easier for the force applied by the user to push down the operating piece 66 to be directed towards the central axis 100 of the aerosol can 2, thereby equalizing the forces acting on the first stem 42 and the second stem 43.

[0053] Furthermore, in this embodiment, the contact surface 66a is curved such that the central part is positioned above both ends in the width direction. As a result, when the user pushes down the operating piece 66, even if the user pushes down, for example, the end of the contact surface 66a in the width direction, a force acts in the direction normal to the contact surface 66a. Therefore, the force with which the user pushes down the operating piece 66 is directed toward the central axis 100 side (the center side in the width direction). This suppresses variations in the force acting on the first stem 42 and the second stem 43, which are aligned in the width direction of the operating piece 66, via the nozzle 61. Consequently, the amount of contents discharged from the first stem 42 and the amount of contents discharged from the second stem 43 can be equalized.

[0054] Furthermore, in this embodiment, the rear end of the contact surface 66a is curved so that it is located lower as it moves backward in the front-rear direction. As a result, when the user pushes down the operating piece 66, even if the rear end of the contact surface 66a is pushed by the user, a force acts in the direction normal to the contact surface 66a, so that the force with which the user pushes down the operating piece 66 is directed toward the central axis 100 (forward side).

[0055] Furthermore, in this embodiment, the upper ends of the first vertical wall portion 62a and the second vertical wall portion 62b are made higher than the operating piece 66, so that the inner surfaces 62a1 and 62b1 can prevent the user's fingers from sliding outward in the width direction along the contact surface 66a when the user pushes down the operating piece 66. In addition, since unintended access to the operating piece 66 is restricted by the first vertical wall portion 62a and the second vertical wall portion 62b, the operating piece 66 is less likely to be operated by mistake.

[0056] Furthermore, in this embodiment, since the nozzle unit 3 is composed of only two parts, the base 5 and the discharge head 6, the number of components is reduced, and manufacturing costs can be lowered.

[0057] -Experimental Example- Next, with reference to Figures 9 to 14, we will describe experimental examples conducted to confirm the effects of this embodiment. In these experimental examples, a dispensing head according to the embodiment and a dispensing head according to the comparative example were fabricated, and sensory evaluation and instrumental analysis were performed using them. As shown in Figure 9, in the dispensing head of the embodiment, the contact surface of the operating piece is curved in a protruding shape, whereas in the dispensing head of the comparative example, the contact surface of the operating piece is formed to be almost flat. The other configurations of the dispensing head of the embodiment and the dispensing head of the comparative example are the same.

[0058] [Sensory evaluation] In this sensory evaluation, the dispensing state was observed when the widthwise end of the operating piece of the dispensing head was pressed by a subject after attaching the example's dispensing head to an aerosol can. Similarly, the dispensing state was observed when the widthwise end of the operating piece of the comparative example's dispensing head was pressed by a subject after attaching the comparative example's dispensing head to an aerosol can. The aerosol can is configured so that a white substance is dispensed from the first stem and a pale yellow substance is dispensed from the second stem.

[0059] Specifically, using a two-liquid dispenser with the dispenser head of the example, five subjects each performed the dispensing operation (pressing the end of the operating piece in the width direction) five times, and the dispensed contents were visually observed to evaluate the uniformity of the dispensed contents. Similarly, using a two-liquid dispenser with the dispenser head of the comparative example, five subjects each performed the dispensing operation five times, and the dispensed contents were visually observed to evaluate the uniformity of the dispensed contents.

[0060] As a result, in the case of the two-liquid dispenser with the discharge head of the example, uniform discharge was achieved in 13 out of 25 trials. In contrast, in the case of the two-liquid dispenser with the discharge head of the comparative example, uniform discharge was not achieved even once in 25 trials. Therefore, it was found that the discharge head of the example can equalize the amount of contents discharged from the first stem and the amount of contents discharged from the second stem compared to the discharge head of the comparative example.

[0061] [Instrumental analysis] In this instrumental analysis, the discharge head of the example was attached to an aerosol can, and the widthwise end of the operating piece of the discharge head was pressed down with the instrument. The force acting on the first and second stems at that time was measured, and the deformed operating piece was photographed. Similarly, the discharge head of the comparative example was attached to an aerosol can, and the widthwise end of the operating piece of the discharge head was pressed down with the instrument. The force acting on the first and second stems at that time was measured, and the deformed operating piece was photographed.

[0062] Specifically, for this analysis, as shown in Figure 10, a pressure sensor is first inserted between the first stem and the nozzle, and another pressure sensor is inserted between the second stem and the nozzle. These two pressure sensors are connected to a measuring controller. The pressure sensors are "FlexiForce" manufactured by Nitta Corporation, and the measuring controller is "intercross-413" manufactured by Intercross Corporation. In addition, a silicone rubber replica of a human finger is attached to a digital force gauge (hereinafter referred to as "DFG") mounted on the measuring stand. The DFG is "ZTS-100N" manufactured by Imada Corporation, and the measuring stand is "MX2-500N" manufactured by Imada Corporation.

[0063] Then, the two-liquid dispenser having the discharge head of the embodiment was placed on a measuring stand, and the DFG was lowered, causing the end of the operating piece in the width direction to be pressed down by the silicone rubber for a predetermined time. At this time, the operating piece was photographed from the rear, and the detection results of the two pressure sensors were obtained. Similarly, the two-liquid dispenser having the discharge head of the comparative example was placed on a measuring stand, and the DFG was lowered, causing the end of the operating piece in the width direction to be pressed down by the silicone rubber for a predetermined time. At this time, the operating piece was photographed from the rear, and the detection results of the two pressure sensors were obtained. The lowering speed of the DFG was set to 10 mm / min, and the upper limit of the pressing force on the operating piece by the silicone rubber (the reaction force that the DFG receives from the operating piece) was set to 10 N.

[0064] In the comparative example's two-liquid dispenser with the dispenser head, as shown in Figure 11, when the widthwise end of the operating piece was pressed with 10N, the operating piece tilted 4.4° with respect to the horizontal direction. In contrast, in the embodiment's two-liquid dispenser with the dispenser head, as shown in Figure 12, when the widthwise end of the operating piece was pressed with 10N, the operating piece tilted 3.0° with respect to the horizontal direction. Therefore, it was found that in the embodiment's dispenser head, the amount of sinking on the right side (the side being pressed) of the operating piece was suppressed relative to the left side (the side opposite to the side being pressed), and the strain on the operating piece during pressing was reduced compared to the comparative example's dispenser head.

[0065] Furthermore, in the two-liquid dispenser with the comparative example's dispenser head, as shown in Figure 13, the difference in the detection results of the two pressure sensors is relatively large. One of the two waveforms in Figure 13 is the detection result of one of the two pressure sensors and corresponds to the force pressing down on the first stem by the nozzle. The other of the two waveforms in Figure 13 is the detection result of the other of the two pressure sensors and corresponds to the force pressing down on the second stem by the nozzle. In contrast, in the two-liquid dispenser with the embodiment's dispenser head, as shown in Figure 14, the difference in the detection results of the two pressure sensors is relatively small. One of the two waveforms in Figure 14 is the detection result of one of the two pressure sensors and corresponds to the force pressing down on the first stem by the nozzle. The other of the two waveforms in Figure 14 is the detection result of the other of the two pressure sensors and corresponds to the force pressing down on the second stem by the nozzle. Therefore, it was found that the dispenser head of the embodiment can suppress the variation between the force acting on the first stem and the force acting on the second stem compared to the dispenser head of the comparative example.

[0066] -Other Embodiments- The embodiments disclosed herein are illustrative in all respects and do not constitute a limiting interpretation. Therefore, the technical scope of the present invention is not construed solely by the embodiments described above, but is defined based on the claims. Furthermore, the technical scope of the present invention includes all modifications within the meaning and scope of equivalence to the claims.

[0067] For example, in the above embodiment, an aerosol can 2 was shown as an example of the container of the present invention, but the container of the present invention is not limited to this, and may be a container equipped with a pressurized pump.

[0068] Furthermore, although the above embodiment shows an example in which the aerosol can 2 is provided with two stems (first stem 42 and second stem 43), the aerosol can is not limited to this, and may be provided with three or more stems.

[0069] Furthermore, although the above embodiment shows an example in which the contact surface 66a is curved in both the width direction and the front-rear direction, the invention is not limited to this, and the contact surface may be curved in only one of the width direction or the front-rear direction.

[0070] Furthermore, although the above embodiment shows an example in which the rear end of the contact surface 66a in the front-rear direction is curved, the invention is not limited to this, and the contact surface 66a may be curved along its entire length in the front-rear direction.

[0071] Furthermore, although the above embodiment shows an example in which the nozzle unit 3 is composed of two parts, the nozzle unit is not limited to this and may be composed of three or more parts. Also, the base may not be provided, and it may consist only of a discharge head.

[0072] Furthermore, in the above embodiment, the contact surface 66a of the operating piece 66 may be treated to prevent the user's fingers from slipping.

[0073] Furthermore, although the above embodiment shows an example in which the operating piece 66 is formed to protrude rearward from the nozzle 61, the invention is not limited to this, and the operating piece may be formed to protrude rearward from the nozzle cover.

[0074] Furthermore, although the above embodiment shows an example in which the rear end of the operating piece 66 is formed in an arc shape when viewed in plan, the invention is not limited to this, and the rear end of the operating piece may be formed in a polygon shape when viewed in plan.

[0075] Furthermore, although the above embodiment shows an example where the contact surface 66a is a curved surface, the invention is not limited to this, and the contact surface may be composed of a collection of polygons.

[0076] For example, in the discharge head 6a according to the first modified example shown in Figures 15 and 16, the contact surface 67 of the operating piece 66 is composed of a collection of polygons 67a. Specifically, most of the polygons 67a are hexagonal. The polygons 67a located towards both ends in the width direction (X direction) have a greater degree of inclination of the perpendicular to the central axis 100 (see Figure 2). That is, the polygons 67a located further out in the width direction have a greater inclination with respect to the horizontal plane. Therefore, the central part of the contact surface 67 is positioned above the ends in the width direction. Also, the polygons 67a located towards the rear in the front-rear direction (Y direction) have a greater degree of inclination of the perpendicular to the central axis 100. That is, the polygons 67a located towards the rear in the front-rear direction have a greater inclination with respect to the horizontal plane. Therefore, the contact surface 67 is positioned lower as it moves towards the rear in the front-rear direction. In other words, the contact surface 67 is formed in an upward projection shape. Therefore, the force applied by the user to push down the operating piece 66 is directed towards the central axis 100, thereby equalizing the forces acting on the first stem 42 and the second stem 43.

[0077] Furthermore, in the second modified discharge head 6b shown in Figures 17 and 18, the contact surface 68 of the operating piece 66 is composed of a collection of polygons 68a. Specifically, most of the polygons 68a are formed as triangles or quadrilaterals. The polygons 68a located towards both ends in the width direction (X direction) have a greater degree of inclination of the perpendicular to the central axis 100 (see Figure 2). That is, the polygons 68a located further out in the width direction have a greater inclination with respect to the horizontal plane. Therefore, the central part of the contact surface 68 is positioned above the ends in the width direction. Also, the polygons 68a located towards the rear in the front-rear direction (Y direction) have a greater degree of inclination of the perpendicular to the central axis 100. That is, the polygons 68a located towards the rear in the front-rear direction have a greater inclination with respect to the horizontal plane. Therefore, the contact surface 68 is positioned lower as it moves towards the rear in the front-rear direction. In other words, the contact surface 68 is formed in an upward projection shape. Therefore, the force applied by the user to push down the operating piece 66 is directed towards the central axis 100, thereby equalizing the forces acting on the first stem 42 and the second stem 43.

[0078] Furthermore, in the discharge head 6c according to the third modified example shown in Figures 19 and 20, the contact surface 69 of the operating piece 66 is composed of a collection of polygons 69a. Specifically, most of the polygons 69a are formed as triangles or quadrilaterals. The polygons 69a located towards both ends in the width direction (X direction) have a greater degree of inclination of the perpendicular to the central axis 100 (see Figure 2). That is, the polygons 69a located further out in the width direction have a greater inclination with respect to the horizontal plane. Therefore, the central part of the contact surface 69 is positioned above the ends in the width direction. Also, the polygons 69a located towards the rear in the front-rear direction (Y direction) have a greater degree of inclination of the perpendicular to the central axis 100. That is, the polygons 69a located towards the rear in the front-rear direction have a greater inclination with respect to the horizontal plane. Therefore, the contact surface 69 is positioned lower as it moves towards the rear in the front-rear direction. In other words, the contact surface 69 is formed in an upward projection shape. Therefore, the force applied by the user to push down the operating piece 66 is directed towards the central axis 100, thereby equalizing the forces acting on the first stem 42 and the second stem 43. [Industrial applicability]

[0079] The present invention can be used in a dispensing head for dispensing contents by pressing down multiple stems, and in a dispensing device equipped therewith. [Explanation of Symbols]

[0080] 1 Two-liquid dispenser (dispenser) 2. Aerosol can (container) 6, 6a, 6b, 6c Discharge heads 42. First stem (stem) 43. Second stem (stem) 61 nozzles 62 Frame section 62a First vertical wall section (vertical wall section) 62b Second standing wall section (standing wall section) 66 Operation piece 66a, 67, 68, 69 contact surface 67a, 68a, 69a polygon

Claims

1. A dispensing head is detachably provided to a container having multiple stems, each configured to dispense individual contents from each stem, and is used to push down the multiple stems to dispense the contents. A frame portion that can be attached to the aforementioned container, A nozzle is provided so as to be movable relative to the frame and configured to push down the plurality of stems when moved downwards, The nozzle is formed with an operating piece which is operated by the user when moving the nozzle downward, The nozzle is provided with passages for contents from the plurality of stems, and is configured such that the contents that have passed through the passages are discharged from the discharge port. The operating piece has a contact surface that is touched when the user operates it, When the frame is attached to the container, the plurality of stems are arranged in the width direction of the operating piece. The discharge head is characterized in that the contact surface has a shape configured such that the pressing force has a component directed toward the central axis side based on the normal direction of the contact surface when pressed, and is formed in an upward projection shape so that it is located downward as it progresses from the center toward the ends in the width direction.

2. In the discharge head according to claim 1, The discharge head is characterized in that the contact surface is curved in an arc shape.

3. In the discharge head according to claim 2, The nozzle and the operating piece are arranged adjacent to each other in the front-rear direction, and the operating piece is positioned rearward relative to the nozzle. The discharge head is characterized in that the contact surface is curved such that it is located lower as it moves towards the rear in the front-rear direction.

4. In the discharge head according to claim 1, The discharge head is characterized in that the contact surface is composed of a collection of polygons.

5. In the discharge head according to claim 4, The nozzle and the operating piece are arranged adjacent to each other in the front-rear direction, and the operating piece is positioned rearward relative to the nozzle. The discharge head is characterized in that the contact surface is located lower as it moves towards the rear in the front-rear direction.

6. In the discharge head according to claim 1, The frame portion has a pair of vertical wall portions arranged opposite each other with the operating piece in between, The discharge head is characterized in that the upper ends of the pair of vertical wall portions are positioned above the contact surface of the operating piece.

7. A container having multiple stems, configured to allow individual contents to be dispensed from each stem, The container is detachably provided with a discharge head for pressing down the plurality of stems to dispense the contents, The discharge device is characterized in that the discharge head is the discharge head described in any one of claims 1 to 6.

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