Ejector

Abstract

The present invention provides a dispensing device that simplifies the structure of the pressurized section for spraying the liquid contents in a mist. [Solution] The discharger 2 comprises a cylinder member 5, a piston 6, a lifting member 7, and a pressurizing unit 10. The lifting member 7 has a stem 7a and a head member 7c. When the head member 7c is pressed, the liquid contents 4 are pressurized, the downstream end of the pump chamber 9 opens, and the liquid contents 4 are ejected in a mist. When the pressing operation is released, the lifting member 7 rises, the downstream end of the pump chamber 9 closes, and the liquid contents 4 are drawn from the container body 3 into the pump chamber 9. The pressurizing unit 10 is composed of a lower surface 10c that forms a step 10a on the sliding part 7a1 of the stem 7a. The lower surface 10c of the step 10a catches on the sliding part 6c of the piston 6 during the pressing operation, thereby keeping the downstream end of the pump chamber 9 closed until the liquid contents 4 are pressurized to the extent that they are ejected in a mist from the nozzle 7c2.

Description

Technical Field

[0004] ,

[0006] , , , ,

[0005] , , , , , , ,

[0001] The present invention relates to a dispenser.

Background Art

[0002] A cylinder member held at the mouth of a container body for containing a content liquid, a piston, a lifting member that can move up and down with respect to the cylinder member along with the piston, a biasing portion that biases the lifting member upward, and a pressurizing portion. The lifting member has a stem having a sliding portion on its inner peripheral surface, a piston guide having a contact portion and fitted and attached to the inner peripheral surface of the stem above the sliding portion, and a head member having a jet outlet and attached to the upper end of the stem. A pump chamber is defined by the cylinder member, the piston, and the piston guide. By pressing down on the head member against the biasing force of the biasing portion, the content liquid is pressurized by the pressurizing portion, the sliding portion slides downward with respect to the sliding surface, and the contact portion separates from the contacted portion, thereby opening the downstream end of the pump chamber, and the content liquid is sent from the pump chamber to the jet outlet and ejected in a mist form. Such a dispenser is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a dispenser capable of simplifying the structure of a pressurizing portion for ejecting a content liquid in a mist form.​​​​​​​​​​​​​ A piston that slides on the inner circumferential surface of the cylinder member, A lifting member that can move up and down relative to the cylinder member with the aforementioned piston, A biasing unit that biases the lifting member upward, It has a pressurizing section, The piston has a sliding portion and a contact portion, The lifting member comprises a stem having a sliding portion on its inner circumferential surface, a piston guide having a contact portion and fitted to the inner circumferential surface of the stem above the sliding portion, and a head member having a nozzle and mounted on the upper end of the stem. The pump chamber is partitioned by the cylinder member, the piston, and the piston guide. A pressing operation on the head member against the biasing force of the biasing part pressurizes the liquid contents by the pressurizing part, the sliding part slides downward relative to the sliding part, the contact part separates from the contacted part, the downstream end of the pump chamber opens, and the liquid contents are sent from the pump chamber to the nozzle and sprayed out in a mist. When the pressing operation is released, the lifting member rises due to the biasing part, causing the sliding part to slide upward relative to the sliding part, and the contact part to come into contact with the contacted part, thereby closing the downstream end of the pump chamber, and the liquid contents are drawn from the container body into the pump chamber. The pressurizing portion is formed by the lower surface of the stem which forms a step on the sliding portion. The lower surface of the step is a discharger that, when pressed, catches on the sliding part of the piston, thereby maintaining the downstream end of the pump chamber closed until the liquid contents are pressurized to the extent that they are ejected from the nozzle in a mist-like manner.

[0007] [2] The discharger described in [1], which is formed by assembling only resin components. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a discharger that simplifies the structure of the pressurized section for spraying the liquid contents in a mist. [Brief explanation of the drawing]

[0009] [Figure 1] This is a cross-sectional view showing the state of the discharge container before the pressing operation in the first embodiment of the present invention. [Figure 2] This is an enlarged view of section A in Figure 1. [Figure 3] This is an enlarged view showing the state after a press operation is performed from the state shown in Figure 2. [Figure 4] This is an enlarged view of the discharge container in the second embodiment of the present invention. [Modes for carrying out the invention]

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0011] As shown in Figure 1, in one embodiment of the present invention, the dispensing container 1 has a dispenser 2 and a container body 3. The container body 3 has a cylindrical mouth portion 3a centered on a central axis O, a body portion 3b, and a bottom portion (not shown) connected in this order, and contains the liquid contents 4. The liquid contents 4 are not particularly limited and are, for example, cosmetics such as lotion or sunscreen. In this embodiment, the direction along the central axis O is called the vertical direction, the direction from the bottom portion toward the mouth portion 3a along the vertical direction is called upward, the opposite direction is called downward, the direction perpendicular to the central axis O is called the radial direction, and the direction around the central axis O is called the circumferential direction.

[0012] The discharger 2 has a cylindrical cylinder member 5 held at the mouth 3a of the container body 3 that contains the liquid contents 4 and centered on the central axis O, a piston 6 that slides on the inner circumferential surface of the cylinder member 5, a lifting member 7 that can move up and down relative to the cylinder member 5 together with the piston 6, a biasing part 8 made of resin material and composed of a leaf spring 8a that applies an upward biasing force to the lifting member 7, and a pressurizing part 10 that pressurizes the inside of the pump chamber 9.

[0013] The piston 6 has an annular base 6a centered on the central axis O, a seal portion 6b that extends upward and downward from the outer peripheral edge of the base 6a and slides on the inner peripheral surface of the cylinder member 5, a slidable portion 6c that extends upward in a cylindrical shape from the inner peripheral edge of the base 6a and slides vertically in close contact with the lifting member 7, and a contacted portion 6d that extends downward in a cylindrical shape from the inner peripheral edge of the base 6a.

[0014] The lifting member 7 has a stem 7a that extends vertically in a cylindrical shape and has a sliding portion 7a1 on the inner peripheral surface of the lower end, a piston guide 7b that has a contact portion 7b1 and is fitted and mounted on the inner peripheral surface of the stem 7a above the sliding portion 7a1, and a head member 7c that has a jet outlet 7c2 and is mounted on the upper end of the stem 7a to receive a pressing operation.

[0015] The piston guide 7b has a bottomed cylindrical tubular portion 7b3 that has an inlet 7b2 for passing the content liquid 4 radially inward and is mounted on the inner peripheral surface of the stem 7a by fitting, a contact portion 7b4 that extends radially outward from the lower end of the tubular portion 7b3 and abuts against the lower end of the contacted portion 6d of the piston 6 from below, and a vertical tubular portion 7b5 that extends upward in a cylindrical shape from the outer peripheral edge of the contact portion 7b4. The ejector 2 has an opening / closing portion 11 that becomes a closed state in which the downstream end of the pump chamber 9 is closed when the contact portion 7b1 and the contacted portion 6d come into contact with each other, and becomes an open state in which the downstream end of the pump chamber 9 is opened when the contact portion 7b1 and the contacted portion 6d are separated. In the present embodiment, the contact portion 7b1 is constituted by the inner peripheral surface of the vertical tubular portion �b۵ and is configured to contact the outer peripheral surface of the contacted portion 6d. However, the present invention is not limited to this. For example, without providing the vertical tubular portion 7b5, the contact portion 7b1 may be constituted by the upper surface of the contact portion 7b4 and may be configured to contact the lower end of the contacted portion 6d. Without providing the vertical tubular portion 7b5, the contact portion 7b1 may be constituted by the lower end portion of the outer peripheral surface of the tubular portion 7b3 and may be configured to contact the inner peripheral surface of the contacted portion 6d.

[0016] The head member 7c has a top wall portion 7c1, a jet outlet 7c2 that opens laterally from the top wall portion 7c1, an outer peripheral wall portion 7c3 that extends downward from the top wall portion 7c1, and a connection cylinder 7c4 that extends downward from the top wall portion 7c1 inside the radial direction of the outer peripheral wall portion 7c3 and is connected to the stem 7a. The top wall portion 7c1 has an internal flow path that connects the internal flow path of the connection cylinder 7c4 to the jet outlet 7c2. In this embodiment, the jet outlet 7c2 is provided in a nozzle tip 7c5 attached to the top wall portion 7c1 from the side, but it is not limited to this.

[0017] The discharger 2 has a pump chamber 9 partitioned by a cylinder member 5 (cylinder portion 5a), a piston 6, and a piston guide 7b. The cylinder member 5 has a cylinder portion 5a and a flange portion 5b that extends radially outward from the upper end portion of the cylinder portion 5a. The seal portion 6b of the piston 6 slides on the inner peripheral surface of the cylinder portion 5a. The cylinder member 5 has a suction port 5c that constitutes the upstream end of the pump chamber 9 at the lower end portion of the cylinder portion 5a, and the discharger 2 has a suction valve 12 provided at the suction port 5c. The suction valve 12 closes the suction port 5c during the pressing operation and opens the suction port 5c when the pressing operation is released. In this embodiment, the suction valve 12 is an elastic valve, but it is not limited to this.

[0018] The discharger 2 has a mounting cap 13 mounted on the mouth portion 3a of the container body 3. The mounting cap 13 has a mounting cylinder 13a mounted on the mouth portion 3a, an annular top wall 13b that extends radially inward from the upper end portion of the mounting cylinder 13a in a top view, and a cylindrical shape that extends upward from the top wall 13b outside the radial direction of the outer peripheral wall portion 7c3 of the head member 7c and guides the outer peripheral wall portion 7c3 of the head member 7c in the vertical direction during the pressing operation. The mounting cap 13 sandwiches and holds the flange portion 5b between the upper surface of the mouth portion 3a and the lower surface 10c of the top wall 13b.

[0019] The biasing section 8 is composed of a leaf spring 8a extending upward from the top wall 13b of the cap on the radially inner side of the guide tube 13c of the mounting cap 13. Multiple leaf springs 8a are provided arranged in a circumferential direction. The leaf spring 8a has an outer surface on which the outer peripheral wall portion 7c3 of the head member 7c slides downward when the head member 7c is lowered by a pressing operation, and the outer peripheral surface of the leaf spring 8a is inclined radially outward toward downward. The biasing section 8 generates a biasing force that biases the head member 7c upward due to the restoring force from the elastic deformation, as the outer peripheral wall portion 7c3 of the head member 7c slides downward on the outer peripheral surface of the leaf spring 8a when the head member 7c is lowered, pressing the leaf spring 8a radially inward and causing elastic deformation.

[0020] As shown in Figure 2, the pressurizing portion 10 is composed of a lower surface 10c that forms a step 10a on the sliding portion 7a1 of the stem 7a. The step 10a is formed by a lower sliding portion 10b that extends straight upward from the lower end of the stem 7a, a lower surface 10c that extends radially inward so as to reduce the diameter of the upper end of the lower sliding portion 10b in a step shape, and an upper sliding portion 10d that extends straight upward from the inner peripheral edge of the lower surface 10c. The outer peripheral surface of the upper end of the sliding portion 6c is in close contact with the lower sliding portion 10b when the sliding portion 7a1 of the stem 7a is in its initial position before the pressing operation. The lower surface 10c of the step 10a catches on the upper end surface of the sliding part 6c of the piston 6 during the pressing operation, thereby maintaining the downstream end (opening / closing part 11) of the pump chamber 9 in a closed state until the liquid contents 4 are pressurized to the extent that they are ejected in a mist-like manner from the nozzle 7c2.

[0021] Therefore, when the head member 7c is pressed down, the sliding part 7a1 slides downward relative to the sliding part 6c, and the upper end surface of the sliding part 6c catches on the lower surface 10c of the step 10a. As the lifting member 7 descends with the piston 6 in a closed position, the inside of the pump chamber 9 is pressurized. Subsequently, as the pressing operation continues, the pressure inside the pump chamber 9 increases, causing the upper end of the sliding part 6c to elastically deform radially inward and overcome the step 10a. With the sliding part 6c in close contact with the upper sliding part 10d, the sliding part 7a1 slides further downward relative to the sliding part 6c, and the contact part 7b1 and the contacted part 6d separate, opening the opening / closing part 11. Subsequently, the lower end of the stem 7a contacts the base 6a of the piston 6 from above (see Figure 3), and the lifting member 7 descends with the opening / closing section 11 open, causing the liquid 4 inside the pump chamber 9 to pass through the opening / closing section 11 and the inlet 7b2 of the piston guide 7b in that order and be ejected in a mist from the nozzle 7c2.

[0022] Furthermore, when the pressing operation is released, the lifting member 7 rises due to the biasing part 8, causing the sliding part 7a1 to slide upward relative to the sliding part 6c, and the contact part 7b1 to come into contact with the contacted part 6d, thereby closing the opening / closing part 11, and the contents liquid 4 is sucked from inside the container body 3 into the pump chamber 9. The sliding part 7a1 slides upward on the sliding part 6c and returns to its initial position.

[0023] According to this embodiment, the pressurizing section 10 can be realized with a simple structure using a lower surface 10c that forms a step 10a on the sliding portion 7a1 of the stem 7a. Furthermore, since the pressurizing section 10 can be constructed without using a metal spring, a highly recyclable discharger 2 can be realized by assembling only resin components.

[0024] In this embodiment, the upper sliding portion 10d extends straight upward from the inner peripheral edge of the lower surface 10c of the step 10a, but this is not limited to this configuration. For example, the upper sliding portion 10d may be configured to extend in a tapered shape that decreases in diameter upward, as shown in the second embodiment in Figure 4. In Figure 4, the state before the pressing operation is shown by a dashed line, and the state after the pressing operation is shown by a solid line.

[0025] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and the embodiments described above can be modified in various ways without departing from the spirit of the present invention.

[0026] For example, in the embodiment described above, the biasing part 8 is made up of a leaf spring 8a, but it is not limited to this and may be made up of, for example, a compression spring that can expand and contract in the vertical direction. [Explanation of Symbols]

[0027] 1 Discharge container 2 Dispenser 3. Container body 3a Mouth 3b Torso 4 Content liquid 5 Cylinder Member 5a Cylinder section 5b Flange section 5c Inlet 6 pistons 6a base 6b Seal part 6c Sliding part 6d Contacted part 7 Lifting Member 7a Stem 7a1 Sliding part 7b Piston Guide 7b1 Contact part 7b2 Inlet 7b3 Cylindrical part 7b4 Contact part 7b5 Vertical cylinder part 7c Head component 7c1 Ceiling wall section 7c2 spout 7c3 Outer wall 7c4 connecting tube 7c5 nozzle tip 8. Biasing section 8a Leaf spring 9 Pump Room 10 Pressurized section 10a Step 10b Lower sliding part 10c Bottom 10d Upper sliding part 11 Opening / Closing Section 12 Suction valve 13. Mounting cap 13a Mounting tube 13b Cap top wall 13c Guide tube O center axis

Claims

1. A cylinder member held at the mouth of the container body that holds the liquid contents, A piston that slides on the inner circumferential surface of the cylinder member, A lifting member that can move up and down relative to the cylinder member with the aforementioned piston, A biasing unit that biases the lifting member upward, It has a pressurizing section, The piston has a sliding portion and a contact portion, The lifting member comprises a stem having a sliding portion on its inner circumferential surface, a piston guide having a contact portion and fitted to the inner circumferential surface of the stem above the sliding portion, and a head member having a nozzle and mounted on the upper end of the stem. The pump chamber is partitioned by the cylinder member, the piston, and the piston guide. A pressing operation on the head member against the biasing force of the biasing part pressurizes the liquid contents by the pressurizing part, the sliding part slides downward relative to the sliding part, the contact part separates from the contacted part, the downstream end of the pump chamber opens, and the liquid contents are sent from the pump chamber to the nozzle and sprayed out in a mist. When the pressing operation is released, the lifting member rises due to the biasing part, causing the sliding part to slide upward relative to the sliding part, and the contact part to come into contact with the contacted part, thereby closing the downstream end of the pump chamber, and the liquid contents are drawn from the container body into the pump chamber. The pressurizing portion is formed by the lower surface of the stem which forms a step on the sliding portion. The lower surface of the step is a discharger that, when pressed, catches on the sliding part of the piston, thereby maintaining the downstream end of the pump chamber closed until the liquid contents are pressurized to the extent that they are ejected from the nozzle in a mist-like manner.

2. The discharger according to claim 1, which is formed by assembling only resin components.

Images