Pressurized sprayer
By integrating the spring and valve portions using synthetic resin and eliminating metal parts, the pressurized sprayer achieves recyclability and resource efficiency, addressing the challenges of material recyclability and part reduction in existing sprayers.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- CANYON
- Filing Date
- 2022-04-29
- Publication Date
- 2026-05-26
Smart Images
Figure 0007865558000001 
Figure 0007865558000002 
Figure 0007865558000003
Abstract
Description
Technical Field
[0001] The present invention relates to a pressure accumulator sprayer that can be recycled, improves resource efficiency, and contributes to the SDGs.
Background Art
[0002] Among liquid ejection sprays, there is a so-called pressure accumulator sprayer equipped with a special S-valve that increases the ejection force. Generally, this pressure accumulator sprayer has a structure in which a piston is slid relative to a cylinder to apply pressure to the liquid, and the liquid in the cylinder in a state exceeding a certain pressure is instantaneously ejected from a nozzle.
[0003] When a certain pressure is reached, the liquid can be instantaneously ejected vigorously, so it is extremely useful. As such a pressure accumulator sprayer, several developments have been made on the components that constitute it.
[0004] For example, Patent Document 1 discloses a pressure accumulator trigger sprayer that, when attached to a container, moves a piston part by rotating a trigger part to apply pressure to the liquid in the cylinder part of the cylinder part, and when a certain pressure is reached, ejects the liquid from a nozzle part through a passage P.
[0005] And in this trigger sprayer, a coil spring is used to apply elastic pressure to the second valve, and a metal one is used for this coil spring in order to obtain sufficient elastic force.
Prior Art Documents
Patent Documents
[0006]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0007] However, in the above-mentioned pressurized trigger sprayers, the metal parts are difficult to recycle. In particular, although pressurized trigger sprayers are handy and have a small volume, many of their parts are made of synthetic resin, so if metal parts are included, they must be sorted and removed. Therefore, from the perspective of material recyclability, this is extremely inefficient and undesirable. Today, with the rise of the SDGs, there is a growing demand for recycling and resource efficiency, and there is a strong need for recyclable pressurized trigger sprayers. Furthermore, from the perspective of resource efficiency, there is also a demand for pressurized trigger sprayers with as few parts as possible.
[0008] This invention was made against this backdrop; that is, the object of this invention is to provide a pressurized sprayer that facilitates material recycling, and furthermore, to provide a pressurized sprayer that makes efficient use of resources, and thus ultimately contributes to the SDGs. [Means for solving the problem]
[0009] The inventors diligently studied to solve the above problems and discovered that by integrating the spring and valve portions of a second valve and injection molding them using a specific synthetic resin, metal parts can be eliminated, and at the same time, the number of parts can be reduced, making the material recyclable. This invention was completed based on this finding.
[0010] In other words, the present invention comprises (1) a part made of polyolefin, each part having a nozzle part F, a base part B having a sub-cylinder part B2 above and a main cylinder part B1 below, a first passage part P1 leading from the container to the main cylinder part B1, a second passage part P2 leading from the main cylinder part B1 to the sub-cylinder part B2, and a third passage part P3 leading from the sub-cylinder part B2 to the nozzle part F, a piston part D sliding inside the main cylinder part B1, and a protrusion formed on the side surface of the base part B It comprises a trigger section E that rotates around a support shaft section BA as a pivot point and slides the piston section D backward, a trigger return spring I that returns the trigger section E forward, a first valve FV provided in the first passage section P1, a second valve structure A attached to the sub-cylinder section B2, an introduction tube H that draws up and passes the liquid from the container, a cover section C that covers the base section B from above, a cap section G for attaching to the container, and a packing K that seals the cap section G and the base section B. In the initial setup state in which the second valve structure A is incorporated into the pressure-accumulating sprayer X, it is present in the pressure-accumulating sprayer X, which is in an unloaded state and not subjected to compressive force in the vertical direction.
[0011] Furthermore, the present invention also relates to (2) The device consists of parts made of polyolefin, each part comprising: a nozzle section F, a base section B having a sub-cylinder section B2 above and a main cylinder section B1 below, a first passage section P1 leading from the container to the main cylinder section B1, a second passage section P2 leading from the main cylinder section B1 to the sub-cylinder section B2, and a third passage section P3 leading from the sub-cylinder section B2 to the nozzle section F; a piston section D sliding inside the main cylinder section B1; and a trigger section E that rotates around a support shaft section BA protruding from the side of the base section B, causing the piston section D to slide backward. The device comprises a trigger return spring I that returns the trigger part E to the forward position, a first valve FV provided in the first passage part P1, a second valve structure A attached to the sub-cylinder part B2, an introduction pipe H that draws up and passes the liquid from the container, a cover part C that covers the base part B from above, a cap part G for attaching to the container, and a packing K that seals the cap part G and the base part B. The support shaft part BA formed on the base body B has a cross-sectional shape with a large arc part BA1 and a small arc part BA2, and the area between them is a missing part, which is located in the pressurized sprayer X.
[0013] Furthermore, the present invention is ( 3 ) The accumulator-type sprayer X according to claim 1 exists such that, if L2 is the distance between the bottom of the sub-cylinder section B2 and the support wall section C1 of the cover section C, and L1 is the vertical length of the second valve structure A when unloaded, then the relationship between the two is L2 > L1.
[0014] Furthermore, the present invention is ( 4 ) The accumulative sprayer X according to claim 1, 2, or 3, wherein the second valve structure A consists of a spring portion 1 and a valve piston portion 2, and the spring portion 1 and the valve piston portion 2 are integrally molded. .
[0015] Furthermore, the present invention is ( 5) The trigger and return spring are integrally injection-molded during manufacturing in the Accumulator Sprayer X. [Effects of the Invention]
[0016] The present invention comprises (1) a part made of polyolefin, each part having a nozzle part F, a base part B having a sub-cylinder part B above and a main cylinder part B1 below, a first passage part P1 leading from the container to the main cylinder part B1, a second passage part P2 leading from the main cylinder part B1 to the sub-cylinder part B, and a third passage part P3 leading from the sub-cylinder part B to the nozzle part, a piston part sliding inside the main cylinder part B1, and a trigger part that rotates around a support shaft part BA protruding from the side surface of the base part B as a pivot point and slides the piston part backward, and the trigger The pressurized sprayer X includes all its components, such as a trigger return spring I that returns the guard section E to its forward position, a first valve FV provided in the first passage section P1, a second valve structure A mounted on the sub-cylinder section, an introduction pipe H that draws up and passes the liquid from the container, a cover section C that covers the base section B from above, a cap section G for attaching to the container, and a packing K that seals the cap section and the base section B. Its materials are easily recyclable, and furthermore, it contributes to the SDGs as a result of resource efficiency, making it extremely useful.
[0017] Furthermore, (2) the second valve structure A consists of a spring portion 1 and a valve piston portion 2, and the spring portion 1 and the valve piston portion 2 are integrally molded, thus reducing the number of parts and allowing the spring function and valve function to be performed in a smaller spatial area. As a result, the second valve structure A can be positioned as high as possible, thereby increasing the area in which it can be installed behind the main cylinder. Consequently, it becomes possible to increase the rearward movement distance of the piston, reducing the trigger pull force, that is, reducing the mechanical load, and increasing the discharge volume (spray volume).
[0018] Furthermore, (3) in the initial set state when the second valve structure A is incorporated into the pressure-accumulating sprayer X, it is in an unloaded state where it is not subjected to compressive force in the vertical direction, so no plastic deformation occurs in the polyolefin material of the spring body, and the valve function is always performed efficiently.
[0019] In addition, since the support shaft portion BA formed on the (4) base body has a large arc portion BA1 and a small arc portion BA2 in the cross-sectional shape, and there is a missing portion therebetween, a small space portion S is generated between the bearing hole E1 of the trigger and the support shaft portion BA, and the frictional force is reduced compared to the prior art.
[0020] Also, (5) when the distance between the bottom B2A of the sub-cylinder portion B2 and the support wall portion C1 of the cover portion C is L2, and the vertical length of the second valve structure A when unloaded (i.e., in the state of not being assembled) is L1, the relationship between the two is L2 > L1, so that plastic deformation does not occur in the material. Therefore, the function of the spring portion of the second valve structure A is always maintained.
[0021] In addition, (6) since the trigger and the return spring are integrally (the same body) injection-molded during manufacturing, they become separate bodies after assembly and function respectively, but they can be manufactured integrally at once, so the manufacturing cost can be greatly reduced.
Brief Description of the Drawings
[0022] [Figure 1] FIG. 1 is a perspective view showing the accumulator type sprayer of the present invention. [Figure 2] FIG. 2 is a side view showing the accumulator type sprayer of the present invention. [Figure 3] FIG. 3 is a longitudinal sectional view showing the accumulator type sprayer of the present invention. [Figure 4] FIG. 4 is a longitudinal sectional view showing the arrangement state of the second valve structure in the accumulator type sprayer of the present invention, showing the initially set unloaded state. [Figure 5] FIG. 5 is a longitudinal sectional view showing the accumulator type sprayer of the present invention, showing the state where the second valve structure has reached the top dead center. [Figure 6] FIG. 6 is a longitudinal sectional view showing the arrangement state of the second valve structure in the accumulator type sprayer of the present invention, showing the state where the S valve structure has reached the top dead center. [Figure 7] FIG. 7 is a view for explaining the relationship between the trigger portion and the support shaft portion. [Modes for carrying out the invention]
[0023] Preferred embodiments of the present invention will be described in detail below, with reference to the drawings as necessary. In the drawings, the same elements will be denoted by the same reference numerals, and redundant explanations will be omitted. Furthermore, unless otherwise specified, positional relationships such as up, down, left, and right will be based on the positional relationships shown in the drawings. Moreover, the dimensional ratios in the drawings are not limited to those shown.
[0024] (Embodiment) Figure 1 is a perspective view showing the pressure-accumulating sprayer X of the present invention. Figure 2 is a side view showing the pressure-accumulating sprayer X of the present invention. Figure 3 is a longitudinal cross-sectional view showing the pressure-accumulating sprayer X of the present invention. Figure 4 is a longitudinal cross-sectional view showing the arrangement of the second valve structure A in the pressure-accumulating sprayer X of the present invention, showing the initial set no-load state.
[0025] The present invention's pressurized sprayer X has the function of moving the piston part backward by rotating the trigger part E, thereby applying pressure to the liquid in the cylinder, and when a certain pressure is exceeded, forcefully ejecting the liquid to the outside from the nozzle part F, with the second valve structure A playing the role of storing that pressure. In terms of structure, the present invention's pressurized sprayer X comprises a nozzle part F, a base part B, a piston part D, a cover part C, a trigger part E, a second valve structure A, a first valve FV, an introduction pipe H, a trigger return spring I, a cap part G, and a packing K.
[0026] The base section B includes the main cylinder section B1, the sub-cylinder section B2, the first passage section P1, the second passage section P2, and the third passage section P3, and is an important part that has passages through which the liquid flows. The pressurized sprayer X of the present invention consists of the above 11 parts. Incidentally, the liquid flow is as follows: container J → introduction pipe H → first passage section P1 → first valve FV → main cylinder section B1 → second passage section P2 → sub-cylinder section B2 → second valve structure A → third passage section P3 → nozzle section F → outside.
[0027] Furthermore, since each component is made of PO (polyolefin), it is recyclable. Here, it is preferable to use PP (polypropylene) as the material for the nozzle part F, trigger part E, trigger return spring I, base part B, second valve structure A, cover part C, cap part G, and introduction tube H.
[0028] Furthermore, it is preferable to use LLDPE (linear low-density polyethylene) for the piston section D and the first valve FV, and EPE (expanded polyethylene) for the packing K. By specifying the materials as described above, it is possible to keep the total weight of the pressurized sprayer X, which does not use metal parts, to 20g or less. Incidentally, the weight relationship of each part is, for example, 1) base body B > 2) cover section C > 3) cap section G > 4) trigger section E > 5) introduction tube H > 6) trigger return spring I > 7) nozzle section F > 8) piston section D > 9) second valve structure A > 10) first valve FV > 11) packing K. Next, the relative arrangement of each part will be described.
[0029] First, the nozzle part is at the tip of the base part B It is attached, and liquid is sprayed outward from here. The base part B is an important part that has a passage through which the liquid flows and is the base part. As described above, this base part B has a main cylinder part B1, a sub-cylinder part B2, a first passage part P1, a second passage part P2, and a third passage part P3. More specifically, the base part B has a main cylinder part B1 that receives the piston part D at the bottom and a sub-cylinder part B2 that receives the S valve structure A at the top.
[0030] As described above, the base section B includes a first passage section P1 for introducing the liquid in the container into the main cylinder section B1, a second passage section P2 for introducing the liquid from the main cylinder section B1 to the sub-cylinder section B2 where the S valve structure A is located, and a third passage section P3 for introducing the liquid from the sub-cylinder section B2 to the nozzle section F.
[0031] Furthermore, the piston D reciprocates within the main cylinder to apply pressure or negative pressure to the fluid. A support shaft BA protrudes from the side of the base B, and the trigger E rotates around this support shaft BA as a pivot point, causing the piston D to slide backward. When applying pressure to the cylinder, the trigger E rotates backward, causing the piston D to slide backward. Conversely, when reducing the pressure inside the cylinder, the trigger E rotates forward on its own due to the return spring I, causing the piston D to slide forward (return motion).
[0032] On the other hand, a first valve FV is provided in the first passage section P1. More specifically, the first valve FV is provided in the first liquid passage P1 between the main cylinder section B1 and the container J.
[0033] Furthermore, a second valve structure A (described in detail later) is attached to the sub-cylinder section B2. Specifically, the second valve structure A is located between the main cylinder section B1 and the entrance to the passage that supplies liquid to the nozzle section F (i.e., the third passage section P3). The introduction pipe H constitutes a passage that draws up the liquid from the container and passes it towards the main cylinder section B1. A flange is formed at the lower end of the base section B, and the base section B is attached and fixed by screwing in the cap section G and pressing the flange against the mouth of the container. The packing K is for sealing the space between the flange and the upper end of the mouth.
[0034] On the other hand, the cover portion C is attached to the base portion B so as to cover it from above. Incidentally, as mentioned above, the base portion B has a sub-cylinder portion B2 above it, and the inner circumferential wall of the sub-cylinder portion B2 creates a space downstream of the second passage portion P2. The second valve structure A will be installed in this space of the inner circumferential wall. Here, the cover portion C covers the base portion B, but as mentioned earlier, a part of the inside of the cover portion C is a support wall portion C1 that the spring portion 1 of the S valve structure A abuts against.
[0035] Furthermore, a stopper C2 is formed on the inside of the support wall C1, which will be described later. When liquid is sprayed from the nozzle, the second valve structure A moves upward, and the circumferential end of the inverted dome-shaped spring part 1 presses against the support wall C1, opening the valve. Conversely, the spring part 1 biases the valve piston part 2 downward, causing the second valve structure A to move downward and closing the valve.
[0036] Next, we will describe the second valve structure A in detail. Figure 5 is a longitudinal cross-sectional view of the accumulator-type sprayer X of the present invention, showing the state in which the second valve structure A has reached top dead center.
[0037] The second valve structure A consists of a spring portion 1 and a skirt-shaped valve piston portion 2 hanging down from the spring portion 1. The spring portion 1 is formed in an inverted dome shape (in other words, a dish shape) so that it can exert an elastic effect as the second valve structure A.
[0038] On the other hand, the valve piston section 2 comprises a spindle section 21 and a skirt section extending downward from the outer circumference of the spindle section 21. The skirt section consists of two parts: an outer skirt section 22 and an inner skirt section 23 that extends longer downward from the outer skirt section 22. As will be described later, the outer skirt section 22 serves as a seal, and the inner skirt section 23 serves as the valve body. The spindle section 21 is formed in a cylindrical shape between the spring section 1 and the outer skirt section 22. When the second valve valve structure A moves up and down, even if there is some axial runout, there is nothing to contact the wall surface of the sub-cylinder section B2, and therefore it does not hinder movement.
[0039] The core rod portion 21 of the valve piston portion 2 is formed hollow, and its hollow hole 1B is open at the center of the inverted dome-shaped spring portion 1. The presence of this hollow hole 1B in the core rod portion 21 makes the valve piston portion 2 less prone to bending, allowing it to perform its valve function more accurately. The upper end of the core rod portion 21 protrudes from the inverted dome-shaped spring portion 1, forming a cylindrical projection 1A. This cylindrical projection 1A contacts a stopper C2 provided on the cover portion C at top dead center when the second valve structure A moves upward.
[0040] Therefore, the upward movement of the second valve structure A is restricted, and as a result, the deformation of the spring portion 1 is suppressed to a certain range. Incidentally, without the cylindrical projection 1A and stopper C2, the inverted dome-shaped spring portion 1 would turn inside out or undergo extremely distorted deformation. In the state shown in Figure 6, the liquid flows to the third passage through the vertical groove B2B provided in the sub-cylinder portion.
[0041] Here, when the second valve structure A is assembled (initial set state), it is preferable that it is in contact with either the support wall C1 of the cover part C or the bottom B2A of the sub-cylinder part B2, or not in contact with either. The reason for this is that when the second valve structure A is subjected to a compressive load in the vertical direction in the initial set state, its spring part is constantly under pressure, making it prone to plastic deformation of the material (polyolefin resin).
[0042] Therefore, as the period of use increases, the spring force of the second valve structure A decreases. In the initial setup state, when the second valve structure A is in contact with both the support wall C1 of the cover C and the bottom B2A of the sub-cylinder B2, the second valve structure A is subjected to a compressive force in the vertical direction. If the distance between the bottom B2A of the sub-cylinder B2 and the support wall C1 of the cover C is L2, and the vertical length of the second valve structure A under no load is L1, then it is preferable that the relationship between the two is L2 > L1 (see Figure 4). Incidentally, when the second valve structure A is not installed, its length is the same as the vertical length under no load, L1.
[0043] Incidentally, conventionally, when the second valve structure A is incorporated into the accumulator sprayer (initial set state), its upper end is supported by the support wall C1 of the cover C, while its lower end is supported by the bottom of the sub-cylinder B2. Therefore, the second valve structure A is always subjected to pressure in the vertical direction, that is, it is subjected to a load in the compressive direction. The characteristic structure of the accumulator sprayer X and the second valve structure A of the present invention has been described above, but the accumulator sprayer X of the present invention has several further features, which will be described below.
[0044] (Special feature of the cross-section of the support shaft BA) As described above, the support shaft BA is formed to protrude from the side surface of the base body B, and the trigger part E is rotatable using this support shaft BA as a pivot point. Figure 7 is a diagram illustrating the relationship between the trigger part E and the support shaft BA. Note that the area enclosed by the dashed line is shown in enlargement.
[0045] In this invention, as can be seen from the figure, the cross-sectional shape of the support shaft BA has a large arc portion BA1 and a small arc portion BA2, with a gap between them forming the first chord portion BA3 and the second chord portion BA4. As a result, a small space S is created between the bearing hole portion E1 of the trigger portion E and the support shaft portion BA, reducing the frictional force compared to the conventional design. In particular, as shown in the figure, when the small space S is created on the rear side, it is less stressful and more effective when pulling in and rotating the trigger portion E. Incidentally, in the conventional design, the cross-sectional shape of this support shaft portion BA is a perfect circle.
[0046] (Reduced pulling force and increased discharge volume) The pressurized sprayer X of the present invention incorporates an S-valve structure A that combines both spring and valve functions, allowing the spring and valve functions to be performed in a smaller space. As a result, the second valve structure A can be positioned as high as possible, which increases the area where it can be installed behind the main cylinder section B1. Consequently, the rearward movement distance of the piston section D can be increased, resulting in a larger discharge volume. Moreover, the cylinder diameter can be reduced, which also reduces the mechanical burden (i.e., pulling force) on the trigger section E.
[0047] In this invention, the cylinder diameter can be set in the range of 12.5 mm to 14 mm, and the travel distance (stroke) of the piston D can be set in the range of 8.5 mm to 10 mm. Among these, from the viewpoint of the mechanical load on the trigger E and the amount of liquid ejected, a cylinder diameter of 13.5 mm and a travel distance of 9 mm for the piston D are particularly preferred, in which case the liquid ejection amount is 1.3 cc. Incidentally, conventionally, a cylinder diameter of 14.5 mm to 15.2 mm was used, and a travel distance of 6 mm to 7 mm for the piston D was usually used. In particular, a cylinder diameter of 14 mm and a travel distance of 7 mm for the piston D were frequently used, in which case the liquid ejection amount was 1.08 cc. The above points have been demonstrated by the applicant using the pressurized sprayer X of the present invention, which is the same size as the pressurized sprayer X of the conventional example (Patent Document 1).
[0048] (Reduced number of parts during manufacturing) The trigger section E and the return spring I are injection-molded as a single unit during manufacturing. Although they are separate parts after assembly, they can be manufactured as a single unit, significantly reducing manufacturing costs. Preferred embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. In the pressurized sprayer X of the present invention, the material of its parts is polyolefin, and as long as it is within the range of polyolefin, it can be used as appropriate. In addition, for the fast valve FV, other valves can be used as long as they have the function of releasing liquid in one direction. Furthermore, the external shape can, of course, be different from that shown in Figure 1, which is within the scope of design modifications. [Industrial applicability]
[0049] The present invention's pressurized sprayer X is extremely useful because all of its components are made of polyolefin, and the number of parts is kept to a minimum, making it easy to recycle and further contributing to the efficient use of resources, thereby contributing to the SDGs. [Explanation of symbols]
[0050] X...Pressurized sprayer A...Second valve structure 1...Spring section 1A...Cylindrical projection 1B...Center hole 2...Valve piston section 21...Core rod section 22...Outer skirt section 23...Inner skirt section B...Base body BA...Support shaft section BA1...Large arc section BA2...Small arc section BA3...First chord section BA4...Second chord section B1...Main cylinder section B2...Sub-cylinder section B2A...Bottom of sub-cylinder section B2B...Longitudinal groove section of sub-cylinder section C...Cover section C1...Support wall section C2...Stopper section D...Piston section E...Trigger section E1...Bearing hole section F...Nozzle section G...Cap section H...Inlet tube I...Return spring for trigger J...Container K...Packing FV...First valve P1...First passage P2...Second passage P3...Third passage S...Small space
Claims
1. A pressurized sprayer comprising parts made of polyolefin, each part having a nozzle section, a base section having a sub-cylinder section above and a main cylinder section below, a first passage section leading from the container to the main cylinder section, a second passage section leading from the main cylinder section to the sub-cylinder section, and a third passage section leading from the sub-cylinder section to the nozzle section, a piston section sliding within the main cylinder section, a trigger section that rotates around a support shaft section protruding from the side of the base section as a fulcrum and slides the piston section backward, a trigger return spring that returns the trigger section forward, a first valve provided in the first passage section, a second valve structure attached to the sub-cylinder section, an introduction tube that draws up and passes the liquid from the container, a cover section that covers the base section from above, a cap section for attaching to the container, and a packing that seals the cap section and the base section, wherein the second valve structure is in an unloaded state that does not receive compressive force in the vertical direction in the initial set state when incorporated into the pressurized sprayer.
2. A pressurized sprayer comprising parts made of polyolefin, each part having a nozzle portion, a base portion having a sub-cylinder portion above and a main cylinder portion below, a first passage portion leading from the container to the main cylinder portion, a second passage portion leading from the main cylinder portion to the sub-cylinder portion, and a third passage portion leading from the sub-cylinder portion to the nozzle portion, a piston portion sliding inside the main cylinder portion, a trigger portion that rotates around a support shaft portion protruding from the side surface of the base portion as a fulcrum and slides the piston portion backward, a trigger return spring that returns the trigger portion forward, a first valve provided in the first passage portion, a second valve structure attached to the sub-cylinder portion, an introduction tube that draws up and passes the liquid from the container, a cover portion that covers the base portion from above, a cap portion for attaching to the container, and a packing that seals the cap portion and the base portion, wherein the support shaft portion formed in the base body has a large arc portion and a small arc portion in its cross-sectional shape, with a gap between them.
3. The accumulator-type sprayer according to Claim 1, characterized in that, if L2 is the distance between the bottom of the sub-cylinder and the support wall of the cover, and L1 is the vertical length of the second valve structure when unloaded, then the relationship between the two is L2 > L1.
4. The accumulative sprayer according to claim 1, 2, or 3, characterized in that the second valve structure comprises a spring portion and a valve piston portion, and the spring portion and the valve piston portion are integrally molded.
5. The pressurized sprayer according to claim 1, 2, or 3, characterized in that the trigger and the return spring are integrally injection-molded during manufacturing.