JP5201675B2 - Liquid ejector - Google Patents

Description

  The present invention relates to a liquid ejector.

  As a liquid ejector, for example, the mouth and neck can be erected through the shoulder from the upper end edge of the cylindrical barrel whose inner peripheral surface has the same diameter as the upper and lower sides, and the peripheral portion can be slid up to the inner peripheral bottom of the barrel A container body having a movable bottom wall that closes the lower end opening of the body part by fitting, and a cylinder at the lower end suspended from the neck of the mouth and neck, and detachably attached to the container body, and urged upward from the upper end of the cylinder In some cases, a pump having a discharge head is detachably attached to the upper end of a stem that protrudes up and down. These are configured so that the movable bottom wall rises when the liquid in the container is sucked and discharged by a pump, and can be used particularly effectively when the stored liquid does not like contact with air.

  Since this type of conventional liquid ejector can be formed by mounting on a container body having a movable bottom wall using an existing pump, it is easy to manufacture and is preferably used. There is a relatively large gap between the cylinder and the pump cylinder, and when the liquid is filled, air remains in that portion. That is, if the pump is attached after injecting the liquid from above the container body into the trunk portion, air remains in the inner portion of the mouth and neck.

  Therefore, even if the amount is small, there is a disadvantage that the air contacts the liquid. In addition, in order to remove the air remaining in the pump at the beginning of container use, a so-called pumping operation is performed in which the discharge head is moved up and down several times. After that, air from the mouth and neck is drawn to discharge the mixed liquid. May cause inconvenience. As a countermeasure, it is possible to prevent air from remaining by pre-injecting the liquid to the extent that the liquid is filled between the cylinder in the mouth and neck, but even if the movable bottom wall moves to the highest position, that part It is difficult to discharge the liquid, and there is a disadvantage that the liquid that is not discharged until the end remains and is wasted.

  Therefore, in this application, by making a simple structural change in this type of container, contact between the stored liquid and air can be prevented, and mixing of air in the discharged liquid after the pumping operation can be prevented. In addition, the present inventors have proposed an excellent liquid ejector capable of minimizing the presence of wasteful liquid that cannot be ejected in the mouth and neck. (For example, see Patent Document 1)

The liquid ejector of the above-mentioned patent document 1 is a pump having a lower end cylinder suspended in a mouth and neck portion of a container body having a movable bottom wall fitted with a peripheral edge portion slidably raised on an inner bottom portion of a trunk portion. An annular seal with a flange protruding from the outer periphery of the cylinder with a small gap from the inner peripheral surface of the mouth and neck, and the outer peripheral edge of this flange protruding from the lower end of the inner periphery of the mouth and neck The protrusion is liquid-tightly engaged.
JP 2004-001817 A

  Similarly, the present invention can prevent contact between the stored liquid and air by making a simple structural change in this type of container, and also prevent air from being mixed into the discharged liquid after the pumping operation. In addition, an excellent liquid ejector capable of minimizing the presence of wasteful liquid that cannot be ejected in the mouth and neck is proposed.

The first means is configured as follows. That is, the container body A having the movable bottom wall A _{2 in} which the mouth and neck portion 12 is erected from the trunk portion 10 through the shoulder portion 11 and the peripheral edge portion is slidably fitted to the inner circumferential bottom portion of the trunk portion 10. And a pump B attached to the container body A by suspending a cylinder B ₂ at the lower end in the mouth-and-neck portion 12, and the movable bottom wall A _{2 as} the liquid in the container body A decreases due to the operation of the pump B. There in a liquid dispenser which rises, while Tate設the air vent groove 13 in the inner surface upper end of the neck 12, the sealing member C is mounted in a cylindrical mounting base 70 to cylinder B ₂ outer periphery is fitted The upper edge of the reverse skirt-like seal cylinder 71 extending from the upper end of the mounting base 70 is detached from the air vent groove 13 when the pump B is mounted on the container body A. Then, it is pressed against the inner periphery of the mouth / neck portion 12 below the air vent groove 13 .

  The second means is configured as follows. In other words, in the first means, the downwardly engaging stepped portion 73 provided on the outer periphery of the mounting base 70 and the seal member C projecting with a gap between the air neck groove 13 and the inner surface of the mouth neck portion 12 spaced apart. The provided locking projection 14 serves as a means for preventing the seal member C from descending.

The third means was configured as follows. That is, at the second means, the upper portion of the mounting base 70 configured to bend 70a spaced cylinder B ₂ and the gap 74, screwing pump B fitted a sealing member C to the container body A In the final stage, the mounting base 70 and the seal cylinder 71 are pressed inward by the locking protrusion 14 getting over the overpass 75 provided on the outer periphery of the bend 70a.

  The fourth means is configured as follows. That is, in either the second means or the third means, the locking projection 14 forms an annular shape discontinuously provided on the inner peripheral surface of the mouth-neck portion 12.

  In the present invention, even if the compressive strength of the seal cylinder portion 71 is sufficiently increased due to the presence of the air vent groove 13, reliable exhaust can be performed through the air vent groove 13, and a strong sealing property can be obtained after exhaust. As a result, there is no air in the portion where the liquid is stored, and even when the liquid is not preferred for contact with the air, it is possible to avoid the occurrence of inconvenience as much as possible, and the air in the discharged liquid after the pumping operation can be avoided. Mixing can be prevented, the filled liquid can be discharged efficiently, and there is no waste, and since it can be formed by a simple structural change compared to the conventional product, there is little increase in manufacturing cost etc. The effect of is demonstrated. Further, when the pump B is mounted on the container body A, there is also an advantage that it can be easily mounted while venting the air in the mouth and neck portion 12.

A seal is formed by a downward locking step 73 provided on the outer periphery of the mounting base 70 and a locking protrusion 14 protruding from the inner surface of the mouth neck 12 that is spaced apart from the air vent groove 13 with a gap therebetween. in case of a falling prevention means member C is mounted base portion 70 by impact or the like can be prevented by the engagement projection 14 even when the deviation likely the cylinder B _2. Further, since there is a gap between the seal member and the locking projection 14, there is an advantage that the pump B fitted with the seal member C can be smoothly mounted on the container body A. For example, the transition from the lower side to the upper side of the locking projection 14 of the air or liquid that was in the upper part of the container body 10 can be performed smoothly.

The upper portion of the mounting base 70 configured to bend 70a spaced cylinder B ₂ and the gap 74, at the final stage of screwing the fitted pump B a sealing member C to the container body A, it provided the bend portion 70a periphery When the mounting base 70 and the seal cylinder 71 are pressed inward by the locking protrusion 14 getting over the over-projection 75, the seal cylinder 71 and the mouth-and-neck at the end of screwing of the pump B When the pressurizing liquid is filled in the gap with 12, even if the pressure contact force of the seal cylinder part 71 is large, the pressurizing liquid can be removed without difficulty, and finally the locking projection Since 14 passes over the overhanging protrusion 75 and the pressure contact state of the seal tube portion 71 to the mouth and neck portion 12 appears, the sealing performance by the seal tube portion 71 thereafter can be sufficiently exerted.

  When the locking projection 14 has an annular shape that is discontinuously provided on the inner peripheral surface of the mouth-and-neck portion 12, more reliable locking of the seal member C and gas / liquid above and below the locking projection 14 can be achieved. The flow can be performed more reliably.

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

  1 to 3 show an example of the liquid ejector 1, and the liquid ejector 1 includes a container body A, a pump B, a seal member C, and a cap D.

The container body A and the main body portion A _1, a movable bottom wall A _2, constitutes the bottom cap A ₃ Prefecture. The main body part A ₁ is formed of synthetic resin or the like, and the inner peripheral surface stands up from the upper end edge of the cylindrical body part 10 having the same diameter from the top to the bottom through the shoulder part 11 through the shoulder part 11, A plurality of air vent grooves 13 are vertically provided in the inner peripheral upper end portion of the mouth and neck portion 12 in the circumferential direction. An annular locking projection 14 is provided on the inner surface of the mouth neck 12 below the air vent groove 13. In the present invention, the air vent groove 13 is not limited to a plurality of longitudinally arranged circumferential directions as in this example, and a single air vent groove 13 may be provided vertically. It may be provided around.

The movable bottom wall A ₂ is formed of a flexible and elastic material such as an elastomer, and includes a sliding portion 21 that is fitted to the peripheral portion of the bottom plate 20 so as to be slidable and raised on the inner peripheral bottom portion of the body portion 10. . In addition, when the bottom plate 20 is depressed with the central portion of the bottom plate 20 raised downward, a later-described cylinder escape portion is formed, and the sliding portion 21 is formed in a cylindrical shape with upper and lower edges in an upward and downward skirt shape. ing. Further, a short cylinder 22 is suspended from the center of the bottom surface of the bottom plate 20.

Bottom cap A ₃ is formed of a synthetic resin or the like, to extend the bottom wall 31 for closing the body part lower end opening than the fitting tube portion 30 lower edge which is fitted to the trunk portion 10 the outer peripheral lower end portion, a bottom wall 31 top the central portion is erected short tubular portion 32 for supporting the movable bottom wall a ₂ in position.

The pump B is also made mainly of synthetic resin, and a lower end cylinder is suspended in the mouth-and-neck portion 12 to be attached to the container body A, and the pump B is operated to operate the liquid in the container body A. A well-known mechanism that can suck up and discharge can be employed. The pump B in the illustrated example includes a mounting cap B ₁ , a cylinder B _2, and an operating member B ₃ . Mounting cap B ₁ represents, by extending the flange-like top plate 41 than the upper edge of the peripheral wall 40 which is screwed into the neck 12 the outer periphery, fitting the cylinder B ₂ in the top plate 41 periphery dual tubular portion Is standing up.

The upper end of the cylinder B ₂ is fitted between the double cylindrical portions erected from the inner peripheral edge of the top plate 41. Further, a packing p is fitted on the back surface of the mounting cap top plate 41 on the outer periphery of the cylinder B ₂ , and when the pump B is mounted on the container body A, the packing p is interposed between the upper surface of the mouth neck 12. Let this part be liquid-tight. Further, the lower position of the cylinder B ₂ outer periphery has circumferentially a downward stepped portion 50 is reduced in diameter the downward step portion 50 lower periphery.

The actuating member B ₃ has a discharge head 61 fitted to the upper end of a stem 60 in which a piston (not shown) slidably fitted to the inner periphery of the cylinder B ₂ is linked to the lower portion, in depressible are mounted on the cylinder B _2.

The pump B includes a known internal mechanism such as a suction valve (not shown) provided in the cylinder B ₂ , a discharge valve (not shown) provided in the stem 60, and the piston, and the operating member B _3. as well as the discharge from the discharge port 62 the liquid in the cylinder B ₂ by vertically moving, and a known pump mechanism for sucking the liquid in the container body a in the cylinder B _2.

The seal member C is formed of a synthetic resin, an elastomer, or the like, and a relatively flexible material may be selected. A cylindrical mounting base 70 is fitted to the outer periphery of the cylinder B ₂ and mounted, and the upper edge of the reverse skirt-shaped seal cylinder 71 extending from the upper end of the mounting base 70 is connected to the neck of the mouth below the air vent groove 13. It is in pressure contact with the inner periphery of the part 12. The inner surface vertically intermediate portion of the mounting base portion 70 has a larger diameter and the inner diameter of the upper and circumferentially upward stepped portion 72 of the annular engaging an upward stepped portion 72 downward stepped portion 50 of the cylinder B ₂ It is fitted the mounting base 70 to cylinder B ₂ periphery. Further, a downwardly engaging locking step 73 is provided on the outer peripheral upper portion of the mounting base 70, and the locking step 73 and the locking projection 14 of the mouth-and-neck portion 12 prevent the lowering of the seal member C. Is configured.

By providing such a configuration, the storage liquid is prevented from contacting the air as much as possible, and the amount of wasteful liquid that is not discharged is reduced as much as possible. That is, when filling the liquid, for example, the liquid can be injected from above the mouth-neck portion 12 of the container body A to a predetermined level, and then the pump B can be attached. At this time, the seal member C is fitted in the pump B in advance and is attached to the container body A. The air in the mouth and neck portion 12 escapes upward through the air vent groove 13 on the outer peripheral edge of the seal cylinder portion 71, and the screwing end point at which the peripheral wall 40 is screwed down and the packing p is pressed against the upper surface of the mouth and neck portion 12 Occasionally, the upper edge of the seal cylinder part 71 is disengaged from the air vent groove 13, and the peripheral part of the seal cylinder part 71 is in close contact with the inner peripheral surface of the mouth-neck part 12, so that a reliable sealing action occurs in this part. Then, the excess liquid is pressed into the cylinder B ₂ , or the upper edge of the seal cylinder 71 is opened with a slight hydraulic pressure and discharged upward, and the seal cylinder 71 and the mouth-neck 12 are discharged. The liquid is filled in a slight gap between the two.

The falling prevention means is a seal member C to prevent the lowering of the sealing member C engagement projection 14 upper surface step portion 73 lower surface upon the deviation so downwardly from the cylinder B ₂ is in contact with However, if such inconvenience does not occur, the inner surface of the locking projection 14 is slightly spaced from the outer surface of the mounting base 70, and the upper surface of the locking projection 14 is the lower surface of the locking step 73. The cylinder B ₂ and the seal member C can be smoothly lowered when the cylinder B _{2 is} installed. Therefore, in consideration of this point, it is also preferable to form the annular locking projections 14 discontinuously so as to make the upper and lower communication of the locking projections 14 more reliable. When formed discontinuously, the upper surface of the locking projection 14 may be closely fitted to the lower surface of the locking step 73 and the inner surface may be closely fitted to the outer surface of the mounting base 70. The liquid discharger of the present invention preferably stores and uses a liquid having a relatively high viscosity, but naturally a liquid having a low viscosity can also be used.

  4 to 7 show other examples. In the example of FIG. 1, the configuration of the seal member C and the locking projection 14 is different. In this example, a discontinuous annular locking projection 14 is provided at a predetermined position on the inner peripheral lower portion of the mouth-and-neck portion 12.

The sealing member C is, in the example of FIG. 1, the upper portion of the mounting base portion 70 constitutes a bend portion 70a spaced cylinder B ₂ and the gap 74, also downward engagement of the bend portion 70a periphery Below the stepped portion 73, a protruding protrusion 75 is provided around a predetermined gap in which the locking protrusion 14 of the mouth and neck 12 is loosely fitted. In this case as well, since the locking projections 14 are discontinuous, the locking projections 14 may be configured to fit perfectly in the gap. The lower surface of the climbing protrusion 75 is formed in a taper shape so that it can be easily climbed. Then, at the final stage of screwing the pump B fitted with the seal member C onto the container body A, the mounting base 70 and the seal cylinder 71 are pressed inward by the overhanging protrusion 75 getting over the locking protrusion 14. Finally, the locking projection 14 is configured to loosely fit into the engagement groove 76 between the locking step 73 and the overpass projection 75. Therefore, when the filling liquid into the container body A is excessive, the pressure contact portion of the seal cylinder portion 71 can be relaxed at the final stage of the installation of the pump B, and the liquid can escape from there. The other configuration is the same as that of the example of FIG.

It is a half sectional view of a liquid ejector. Example 1 It is a half sectional view of a seal member. Example 1 It is a principal part expanded half sectional view of a liquid discharger. Example 1 It is a half sectional view of a liquid ejector. (Example 2) It is a principal part half sectional view of a container body. (Example 2) It is a half sectional view of a seal member. (Example 2) It is a principal part expanded half section of a liquid discharger. (Example 2)

Explanation of symbols

1 ... Liquid ejector A ... Container body
A ₁ ... Main unit
10 ... trunk, 11 ... shoulder, 12 ... mouth and neck, 13 ... air vent, 14 ... locking projection
A ₂ ... movable bottom wall
20 ... bottom plate, 21 ... sliding part, 22 ... short tube
A ₃ … Bottom cap
30 ... Fitting cylinder part, 31 ... Bottom wall, 32 ... Short cylinder part B ... Pump
B ₁ … Installation cap
40 ... Surrounding wall, 41 ... Top plate
B ₂ ... Cylinder
50… Down step B ₃ … Actuating member
60 ... Stem, 61 ... Discharge head, 62 ... Discharge port, p ... Packing C ... Sealing member
70 ... Mounting base, 70a ... Bend part, 71 ... Seal cylinder part, 72 ... Upward step part,
73 ... Locking step, 74 ... Clearance, 75 ... Override projection, 76 ... Engaging groove D ... Cap

Claims (4)

A movable bottom wall ( 10 ) with a neck ( 12 ) raised from the trunk ( 10 ) via the shoulder ( 11 ) and a peripheral edge fitted to the inner circumferential bottom of the trunk ( 10 ) so as to be slidable comprising a container body having an a ₂₎ and (a), and a pump mounted on the neck (12) of the lower end into the cylinder (B ₂₎ and vertically to the container body (a) (B), the pump ( in a liquid dispenser in which the container body by the operation of the B) (movable bottom wall (a ₂ with the decrease of the liquid in a)) rises, the air vent grooves in the inner surface upper end of the neck (12) (13 ) And a seal member (C) mounted by fitting a cylindrical mounting base (70) on the outer periphery of the cylinder (B ₂ ), and the sealing member (C) is mounted on the mounting base (70). The upper edge of the reverse skirt-shaped seal cylinder (71) extending from the upper end is detached from the air vent groove (13) when the pump B is completely attached to the container body A. (13) A liquid ejector that is in pressure contact with the inner periphery of the mouth and neck (12) at a lower position . Mounting base part ( 70 ) Downward locking stepped part ( 73 ) provided on the outer periphery and air neck groove ( 13 ) spaced apart from neck and neck part ( 12 ) and projecting with a gap between seal member ( C ) The liquid ejector according to claim 1, wherein the locking projection ( 14 ) serves as a means for preventing the seal member ( C ) from descending. The upper portion of the mounting base (70) constitutes a cylinder (B ₂₎ and the bend portion a gap (74) (70a), a pump fitted a sealing member (C) (B) to the container body (A) At the final stage of screwing, the mounting protrusion ( 14 ) gets over the overhang protrusion ( 75 ) provided on the outer periphery of the bend portion ( 70a ) , so that the mounting base ( 70 ) and the seal cylinder ( 71 ) are inward. The liquid ejector according to claim 2, wherein the liquid ejector is configured to be pressed. The liquid ejector according to claim 2, wherein the locking protrusion ( 14 ) has an annular shape that is discontinuously provided on the inner peripheral surface of the mouth / neck portion ( 12 ) .

Images