JP4640795B2 - Liquid ejector - Google Patents

Description

  The present invention relates to a liquid ejector, and more particularly to a liquid ejector that can recognize the amount of ejected liquid.

  As this type of ejector, for example, a storage liquid that is required to use a predetermined amount such as a medicine can be determined for use of the predetermined amount. (Patent Document 1)

  The ejector includes a container provided with an upper end opening, means for distributing the administration fluid from the container through the opening, a ring nut for tightening the distribution means to the opening of the container, and movable for operating the distributing means. A nose as an actuating member, and elastic means for converting the movement of the nose relative to the ring nut into the rotation of the rotating element and the reciprocating motion in the axial direction. It is configured to be sequentially positioned in a window which is a predetermined observation position for each dispensing administration.

  The elastic means is comprised of a series of circumferentially spaced flexible legs, the upper of which the legs can react with the first set of one-way serrated teeth of the nose, and the ring nut. A lower portion capable of reacting with one of the second set of serrated teeth, and an intermediate portion attached to the rotating element, whereby the first set of serrated teeth is moved into the second set of serrated shapes by the action of the nose; When approaching a tooth, the upper portion of the small leg is engaged with the adjacent tooth just off the corresponding tooth of the first serrated tooth to rotate and axially move the intermediate portion of the small leg; and The first set of serrated teeth meshes with the teeth that are immediately connected to the corresponding teeth of the second set of serrated teeth, whereby the intermediate portion of the leg is rotated and moved backward in the axial direction. It is configured to make it.

Then, as described above, the numerical value of the dose appears in the window by pushing down the nose, and the radial locator protruding from the rotating element protrudes from the nose after the scheduled maximum amount of pharmaceutical dose is completed. It is configured to stop when hitting.
Japanese Patent No. 3211894

  As described above, the ejector as described above can determine the maximum number of medicines to be administered by stopping the rotating element, but the determination on the number of administrations ends at that time. Certainly, in the above-mentioned ejector, the nose can be pushed down to completely use the medicine in the container after the stop. When the operation is completed, the use of the ejector is completed.

  The present invention proposes a liquid ejector having a structure that is different from that of the conventional one, has no unreasonable operation, and has high durability. In addition, the present invention proposes a liquid ejector capable of not only visual recognition of the required number of ejections but also tactile recognition by a lock mechanism, and more clearly recognizing the end of the necessary amount of ejection. Further, the present invention proposes a liquid ejector capable of releasing the lock state after the lock mechanism is activated and newly performing the necessary number of ejections from the beginning. Furthermore, a liquid ejector that makes a sound when the lock is released after the lock mechanism is activated and can recognize the lock release more clearly is proposed.

As a first means, a cover tube 2 fixed on the aerosol container body A and a stem 8 projecting so as to be able to be pushed in an upward biased state at the upper end of the aerosol container body are fitted, and from the top of the cover cylinder A nozzle 3 having an upper end projecting, a cylindrical push button 4 mounted on the outer periphery of the nozzle so as to be rotatable and capable of depressing the nozzle, and a recognition system for recognizing the number of times the nozzle is depressed, The recognition system includes: a rotating mechanism C ₁ that rotates around the nozzle and is capable of being pressed down in an upward biased state by rotating the rotating member 5 by a predetermined angle by pressing the push button; becomes the unit display c sequentially from the display mechanism C ₂ Metropolitan to emerge, the rotating mechanism is provided with a first inclined surface S ₁ respectively on the lower surface and provided radially on the periphery of the said cover cylinder A plurality of partition plates 20, and the rotary member is projected a second inclined surface S ₂ rotational arm 26 provided to and top to position the tip portion to the pair of the partition plates, the said push button rotates A ring member 6 having a plurality of third inclined surfaces S ₃ annularly connected to the lower surface thereof, the rotation being prevented from rotating between the arm and being able to be pushed down, and the second inclined surface sliding on the lower surface. The display mechanism is configured such that when the push button is depressed, the rotating arm slides over the adjacent partition plate 20t by sliding on the third inclined surface with which the second inclined surface abuts and the adjacent first inclined surface. C ₂ engages the push button 4 with the rotating member 5 so as to be integrally rotatable, and a unit display c listed on the surface of the push button 4 is provided in the window hole w provided in the cover cylinder 2 to It was constructed so that it could be faced sequentially along with the rotation.

As a second means, in the first means, there is provided a lock mechanism C ₃ that prevents the stem 8 from being pushed down when the push button 4 is pushed down a predetermined number of times, and an unlock mechanism C ₄ that releases the locked state. The lock mechanism has an upper surface of the projection 17 projecting at a predetermined position in the lower part of the cover cylinder 2 as a locking surface a, and a lower surface of the rotating arm 26 abuts the locking surface a. The locking surface b is configured so as to prevent the rotating arm 26 from descending, and the unlocking mechanism C ₄ positions the protrusion below the wide portion 21 provided between the partition plates 20 at a predetermined location. In addition, the push button 4 engaged with the rotating member 5 so as to rotate together with the rotating member 5 is rotated to rotate the rotating arm above the locking surface.

As a third means, in the first means, there is provided a lock mechanism C ₃ that prevents the stem 8 from being pushed down when the push button 4 is pushed down a predetermined number of times, and an unlock mechanism C ₄ that releases the locked state. The locking mechanism includes a partition plate upper surface at the lower end position of the missing portion 32 having a predetermined vertical width provided on a specific partition plate of the partition plates 20 as a locking surface a, and The lower surface is configured as a locked surface b that contacts the locking surface a so as to prevent the rotating arm 26 from descending, and the lock release mechanism C ₄ is engaged with the rotating member 5 so as to be integrally rotatable. Further, the push button 4 is rotated to rotate the rotating arm 26 above the locking surface.

As a fourth means, in either the second means or the third means, a sound generating mechanism that emits a sound by the rotation of the rotating member 5 when the lock releasing mechanism C ₄ is unlocked. Provided.

The liquid ejector of the present invention ejects a predetermined ejected liquid by a simple operation of pushing the push button 4, and the unit display b of the window hole w is switched every time the push button 4 is pushed, and the number of pushes at that time Information represented by the unit display b such as the discharge amount can be visually obtained. Further, the rotation mechanism C ₁ constituting the recognition system also includes the third inclined surface S ₃ of the ring member 6 and the second partition plate 20t adjacent to the second inclined surface S ₂ of the rotating member 5 when the push button 4 is pushed down. Since it slides on one inclined surface S ₁ and the rotating arm 26 climbs over the adjacent partition plate 20t, it has excellent durability with a reasonable operation and is extremely easy to operate.

Further, the apparatus having in combination a lock mechanism C _3, when it has reached the required ejection amount of storage solution useful perceptible to tactile and there was provided a lock release mechanism C ₄ is required ejection After the number of times is recognized by the display mechanism C ₂ and the lock mechanism C ₃ , it is possible to eject the required number of times again from the beginning, and it is convenient that this operation can be repeated as many times as the capacity of the aerosol container body A.

As the locking mechanism C ₃ , the upper surface of the protrusion 17 projecting at a predetermined position in the lower part of the cover cylinder 2 is used as a locking surface a, and the lower surface of the rotating arm 26 is in contact with the locking surface a. and as configured to prevent the lowering of the swing arm 26 as a locking surface b, the as the unlock mechanism C _4, is positioned in the wide portion 21 downwardly provided with the projection between the partition plate 20 in a predetermined position, and, In a configuration in which the push button 4 engaged with the rotating member 5 so as to rotate integrally is rotated to rotate the rotating arm above the locking surface, the push button 4 is simply moved in a predetermined direction when unlocking. This can be done by a simple operation of turning. Further, as a lock mechanism C _3, it provided a defect portion 32 of a predetermined vertical width to a specific partition plate of the partition plate 20, even as simple as a partition plate upper surface of該欠loss portion lower end position and the locking face a Can be unlocked by simple operation.

Furthermore during unlocking by the unlocking mechanism C _4, said there by the rotation of the rotary member 5 to that provided the sound output mechanism emits a sound, there is an advantage that can be recognized by hearing the unlocking.

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

  FIG. 1 shows an example of the liquid ejector 1 according to the present invention, and the ejector 1 includes an aerosol container body A and an ejector B, and the ejector B further includes a cover cylinder 2, a nozzle 3, a push button 4, and the like. The rotating member 5 and the ring member 6 are provided.

  In the aerosol container body A, a stem 8 is erected so as to be able to be pushed down from the upper end of a cylindrical barrel 7 having a metering valve therein, and a fixed amount of liquid is ejected from the stem 8 when the stem 8 is pushed down. It is the thing of the well-known structure comprised as follows.

  The cover tube 2 is configured such that the lower end portion is fitted and fixed to the outer periphery of the upper end of the aerosol container body A, and the nozzle 3, the push button 4 and the like protrude from the top portion. In the illustrated example, the mounting member is provided with a cover cylinder main body 2a extending from the upper end edge of the peripheral wall 9 with a top wall 11 having a cylindrical portion 10 standing at the center, and formed separately at the lower end of the cover cylinder main body 2a. 2b is fitted and fixed to the aerosol container body A via the mounting member 2b. The cylindrical portion 10 is provided with a window hole w.

  The attachment member 2b has a fitting cylinder portion 12 fitted to the upper end of the outer periphery of the aerosol container body A suspended from the lower surface of the flange-like base plate portion 13, and is also described later from the inner peripheral edge of the base plate portion 13. A guide tube portion 14 for guiding the vertical movement of the rotating member is suspended. In addition, a connecting cylinder part 15 is provided on the outer peripheral edge of the base plate part 13 so as to be fitted to the cover cylinder main body 2a. The connecting cylinder portion 15 has a lower end portion having a large diameter via a flange, and a positioning groove 16 is provided at the upper end portion. Further, a rod-like protrusion 17 having an upper surface as a locking surface a is erected at a predetermined position on the upper surface of the base plate portion 13.

  The lower part of the peripheral wall 9 of the cover tube main body 2a is fitted to the outer periphery of the connecting tube portion 15 of the mounting member 2b so as to prevent it from being pulled out by the concavo-convex engaging means, and both are integrated. The diameter of the peripheral wall 9 is reduced through a flange at the center in the vertical direction, and a fitting protrusion 18 that fits into the groove 16 is provided from the inner surface of the peripheral wall 9 below the flange. It is configured so that it can be combined.

A plurality of partition plates 20 are provided radially on the peripheral edge in the cover tube 2. Each partition plate 20 is provided at equal intervals, and its lower surface is configured as a first inclined surface S ₁ facing in a direction perpendicular to the radius. However, in this example, in order to form an unlocking mechanism, which will be described later, a wide portion 21 with one partition plate removed is provided at a predetermined location, and the protrusion 17 (that is, the engagement portion) is provided below the wide portion 21. The stop surface a) is positioned. Further, the narrow partition plates 20a, 20a are configured such that the center side end surfaces of the two partition plates at a predetermined number of positions are recessed outward from the wide portion 21 to shorten the radial length. Each partition plate is formed integrally with the cover cylinder 2, but naturally it can be formed separately and assembled. In that case, the partition plate 20 that often requires a relatively large thickness is more formed. It is easy to perform and has the advantage of preventing the occurrence of sink marks as much as possible.

  The nozzle 3 is fitted on the stem 8 of the aerosol container body A, and has an upper end projecting from the top of the cover tube 2 so as to be pushed upward. In the example of FIG. 1, the bottom end portion of the stem 8 is liquid-tightly fitted on the outer periphery of the stem 8, and the bottomed cylindrical portion for locking the lower end portion of the coil spring 23 is provided protruding from the lower end edge. It has a shape. Therefore, when the nozzle 3 is pushed down, the stem 8 is pushed down, and a fixed amount of liquid is ejected by a known ejection mechanism in the aerosol container body A.

  The push button 4 has a cylindrical shape mounted on the outer periphery of the upper portion of the nozzle so as to be rotatable and capable of being pushed down. In the illustrated example, a double cylinder shape having a top is formed so that the nozzle 3 can be pushed through the ring member 6 and the rotating member 5, and an upper cylindrical wall portion of the rotating member 5 which will be described later is formed on the upper outer peripheral portion of the nozzle 3. The lower surface of the ring member is abutted and placed on the upper surface of the base portion of a ring member, which will be described later, via a hemispherical protrusion 24. Moreover, the flange part projected from the outer periphery lower part is aiming at prevention from pulling out upwards.

The rotating member 5 is provided around the nozzle 3 so as to be rotatable and capable of being pushed down in an upward biased state. The tip of the rotating member 5 is positioned between the pair of partition plates 20 and the second inclined surface S ₂ is formed on the upper surface. The provided rotating arm 26 is projected. In the illustrated example, the lower cylindrical wall portion 5c formed in a large diameter from the lower end of the upper cylindrical wall portion 5a fitted to the upper outer periphery of the nozzle 3 so as to be rotatable and vertically movable is formed through the flange portion 5b. The guide tube portion 14 is fitted to the inner periphery of the guide tube portion 14 so as to be vertically movable and rotatable. Furthermore, projecting the swing arm 26 outwardly from the upper end position of the lower tubular wall portion 5c by positioning the distal portion between the pair of partition plates 20, also the second inclined surface S ₂ on the upper surface Provided. The second inclined surface is inclined in a direction orthogonal to the radial direction, and is slidable when the first inclined surface S _{1 of} each partition plate 20 and the first inclined surface S ₁ have substantially the same inclination angle and contact each other. It is composed.

  It should be noted that the use of at least one rotating arm 26 is sufficient. However, in order to rotate the rotating member 5 with more stable and less rattling, an auxiliary rotating arm is provided in addition to the rotating arm. good. The auxiliary rotating arm may be the same length as the rotating arm or may be a short one, and can be appropriately selected depending on the specified ejection amount. When the auxiliary turning arm having the same length as the turning arm is employed, at least a prescribed amount of ejection is performed while the turning arm is rotated 360 °.

In the case of the illustrated example, two short auxiliary rotating arms 26a, 26a are projected at a circumferential interval, and each auxiliary rotating arm is formed at a predetermined protruding position, forming a similar second inclined surface S _2. The number of such auxiliary rotating arms 26a is not particularly limited, but about two to three seems to be appropriate. Further, the projecting position of such a short auxiliary rotating arm 26a is provided so that the angles formed by the adjacent rotating arm or auxiliary rotating arm are different from each other. Further, the projecting width is a projecting width that does not contact the locking surface a and contacts the other partition plate without contacting the narrow partition plate 20a. The coil spring 23 is interposed between the lower surface of the flange portion 5b and the upper surface of the bottomed cylindrical portion of the nozzle 3 to constantly bias upward.

The ring member 6 is interposed between the push button 4 and the rotating arm 26 so as to prevent rotation and can be pushed down, and a third inclined surface S _{3 on} which the second inclined surface S ₂ slides is annularly formed on the lower surface. It is connected continuously. In the illustrated example, the a plurality of the third inclined surface S ₃ on the base portion 6a lower surface of the ring plate, the rotation preventing plate 6b from the base 6a the outer surface a plurality of circumferential projecting, and the partition plate each rotational preventing plate 6b 20 It is fitted between them to prevent rotation. The third inclined surface S ₃ is configured to be slidable when the two inclined surfaces S ₂ have substantially the same inclination angle and come into contact with each other.

In the present invention, a recognition system is provided for recognizing the number of times the nozzle 3 is pushed down, and thus for recognizing the number of times the ejection liquid is ejected, that is, the ejection amount. The rotating mechanism C ₁ is moved, and the display mechanism C ₂ is connected to the rotating mechanism and sequentially displays the unit display c of the number of depressions.

The rotation mechanism C ₁ includes the push button 4, the rotation member, the ring member 6, and the partition plate 20, and a third inclined surface S _{3 with} which the second inclined surface S ₂ abuts when the push button is pressed down. and rotary arm 26 slides the first inclined surface S ₁ on the adjacent is composed as overcome the partition plate 20t adjacent. Referring to FIG. 4, FIG. 4 (a) shows a state in which the rotating arm 26 is positioned between the partition plates adjacent to the wide portion 21, and from this state, the ring member 6 and the push-button 4 are pushed down. When the rotating member 5 is pushed down against the upward biasing force of the coil spring 23 and the stem 8, the flange portion 5b and the bottomed cylindrical portion of the nozzle 3 come into contact with each other to push down the nozzle 3 and eject a predetermined amount of liquid. Further, the rotating arm 26 is initially guided by the adjacent partition plate 20t and descends, and when reaching the position of FIG. 4 (b), the rotating arm 26 is detached from the partition plate 20t. The second inclined surface S ₂ slides on the remaining third inclined surface S ₃ and rotates to the position shown in FIG. 4 (c). Then, when the push button 4 is released, the ring member 6 and the rotating arm 26 rise. and a second inclined surface S ₂ abuts the first inclined surface S ₁ and the rotary arm 26 of the adjacent partition plates 20t, more second inclined surfaces S ₂ slides on the first inclined surface S ₁ on (Fig. 4 (d)), swing arm 26 is rotated overcoming the partition plate 20t on the next third inclined surface S _3. This if the third inclined surface S ₃ of the following are located on the inclined surface a upward (FIG. 4 (e)).

The display mechanism C ₂ engages the push button 4 with the rotating member 5 so as to be integrally rotatable, and displays the unit display c listed on the surface of the push button 4 in the window hole w provided in the cover tube 2. It is configured so as to sequentially face the rotation of the member 5. In the illustrated example, a vertical rib 27 protruding from the outer periphery of the upper cylindrical wall portion 5a of the rotating member 5 is fitted into a concave groove 28 vertically formed on the inner peripheral surface of the push button 4 so that both can be integrally rotated. In addition, as shown in FIGS. 5 and 6, the unit display c is provided on the outer peripheral surface of the push button 4 by a method such as printing or sticking with a sealing material. As specific contents of the unit display c, numbers, characters, symbols, patterns, and other various types can be adopted.

Further, the lock mechanism C ₃ is provided as part of the cognitive system. The locking mechanism C ₃ is provided with a locking surface a at a predetermined position in the lower part of the cover cylinder 2, and the lower surface of the rotating arm 26 is used as a locked surface b that comes into contact with the locking surface a. It is configured to prevent the descent. In the illustrated example, the upper surface of the protrusion 17 projecting at a predetermined position in the lower part of the cover cylinder 2 is used as the locking surface a. Therefore, when the rotating arm 26 rotates and moves to a predetermined position, even if the push button 4 is pushed in, the locked surface b on the lower surface of the rotating arm 26 does not come into contact with the locking surface a, and as a result, Further, the stem 8 can be prevented from descending, so that no liquid is ejected, and that a predetermined amount of liquid is ejected can be recognized not only visually by the display mechanism C ₂ but also tactilely.

In this example, a lock release mechanism C ₄ for releasing the lock state by the lock mechanism C ₃ is provided. This unlocking mechanism C ₄ is configured such that after the ejection of a predetermined ejection amount is once completed by the locking mechanism C ₃ , a new ejection amount of a predetermined ejection amount can be newly started from the beginning. a is configured to be positioned below the wide portion 21 provided at a predetermined position between the partition plates 20, and is configured to be able to engage with the rotating member 5 at a predetermined rotation position of the push button 4, thereby rotating the push button 4. Thus, the rotating member 5 is rotated to move the rotating arm 26 above the locking surface a.

At the time of unlocking by the unlocking mechanism C _4, it may be provided a sound output mechanism emits sound by the rotation of the rotary member 5. For example, as shown in FIG. 7, a sound generating vibrator 29 is projected on the tip side of the rotating arm 26, and the vibrator 29 is placed at a predetermined position on the inner surface of the peripheral wall 9 of the cover tube 2 when unlocking. It is configured to make sound over the provided protrusion 30.

  The liquid ejector 1 configured as described above will be described by taking as an example a case where the stored liquid is a scalp medicine. For example, if the push button 4 is pressed against the scalp and pushed in, the nozzle 3 is pushed in and the stored liquid is ejected, and the push button 4 is pushed in as appropriate from different places, the rotating member 5 rotates a predetermined rotation angle each time, The unit display c represents the current number of ejections from the window hole w. When the predetermined number of times is reached, the rotating arm 26 is positioned above the locking surface a and cannot be pushed any further. At this time, a unit display c such as an end character can be seen from the window hole w, and the end can be recognized visually. In the next use, when the push button 4 is rotated, the rotating arm 26 on the locking surface a is displaced, and the liquid can be ejected, and a predetermined amount of liquid can be ejected again.

8 and 9 show another embodiment, and in the example of FIG. 1, an example in which each partition plate 20 is formed separately, and a cylindrical shape fitted and fixed to the inner peripheral upper end portion of the cover cylindrical peripheral wall 9. Each partition plate 20 protrudes from the inner surface of the connecting plate 22a. Further, as the display mechanism C ₂ , a flange-shaped display plate 31 is projected from the lower end of the outer periphery of the push button 4, and a unit display c is provided on the upper surface of the display plate 31. Each unit display c is configured to be visible from a window hole w provided in the top wall 11 of the cover cylinder 2.

Further, instead of the wide portion 21 and the protrusion 17, a specific partition plate 20 of the partition plates 20 is provided with a defective portion 32 having a predetermined vertical width, and the upper surface of the partition plate at the lower end position of the defective portion is set to the locking surface a. It is provided with a lock mechanism C ₃ that was. Further, as the unlocking mechanism C ₄ , the push button 4 and the rotating member 5 are configured so as to be integrally rotatable with the concave grooves and the vertical ribs as in the example of FIG. Further, in the case of this example, two auxiliary rotating arms having the same form as the rotating arm 26 are provided at equal intervals, and three missing portions 32 are provided at equal intervals. It is set as the form which can recognize the completion | finish of the required ejection amount 3 times during one round. Further, since the auxiliary turning arm 26a has the same length as the turning arm 26, the rotating member 5 can be rotated more stably and less loosely. Others are the same as the embodiment of FIG.

  Also in this case, as shown in FIG. 10, the rotating arm 26 moves from 1 to 5 in the order of signs, and the operation is substantially the same as the example of FIG.

It is a disassembled perspective view of this invention liquid ejector. Example 1 It is a longitudinal cross-sectional view of this invention liquid ejector. Example 1 It is explanatory drawing explaining the partition plate of this invention liquid ejector. Example 1 It is explanatory drawing explaining the effect | action of this invention liquid ejector. Example 1 It is a side view of the pushbutton in this invention liquid ejector. Example 1 It is a side view of this invention liquid ejector. Example 1 It is principal part expansion explanatory drawing of the part of the sound emission mechanism of this invention liquid ejector. (Example 2) It is a longitudinal cross-sectional view of this invention liquid ejector. Example 3 It is a top view of this invention liquid ejector. Example 3 It is explanatory drawing explaining the effect | action of this invention liquid ejector. Example 3

Explanation of symbols

2 ... Cover cylinder, 3 ... Nozzle, 4 ... Push button, 5 ... Rotating member, 6 ... Ring member,
17 ... Projection, 20 ... Partition plate, 21 ... Wide part, 26 ... Rotating arm, A ... Aerosol container body,
C ₁ ... Rotation mechanism, C ₂ ... Display mechanism, C ₃ ... Lock mechanism, C ₄ ... Display release mechanism, a ... Locking surface,
b ... Unit display, S ₁ ... First locking surface, S ₂ ... Second locking surface, S ₃ ... Third locking surface, w ... Window hole

Claims (4)

The cover tube 2 fixed on the aerosol container body A and the stem 8 that protrudes to the upper end of the aerosol container body so as to be pushed in an upward biased state are fitted, and the upper end portion projects from the top of the cover tube. A nozzle 3, a cylindrical push button 4 mounted on the outer periphery of the nozzle so as to be rotatable and capable of being pushed down, and a recognition system for recognizing the number of times the nozzle is pushed down. A rotation mechanism C ₁ that rotates the rotation member 5 provided around the nozzle and capable of being pressed down in an upward biased state by a predetermined angle by pressing down the push button, and a unit display c of the number of times of depression linked to the rotation mechanism are sequentially displayed. It consists display mechanism C ₂ Metropolitan to emerge, the rotation mechanism includes a plurality of partition plates 20 each provided with a first inclined surface S ₁ on and the lower surface disposed radially on the periphery of the said cover cylinder A pair of the partition plates to the is protruded a rotational arm 26 having a second inclined surface S ₂ in and the top surface to position the tip rotating member, the rotation between the said pushbutton times Doude with interposing the depressible to prevent, a plurality of third inclined surface S ₃ of the the lower surface second inclined surface slides and a ring member 6 which is continuously provided annularly, the first during depression of the push button 2 The display device C ₂ is configured to slide on the third inclined surface with which the inclined surface abuts and the adjacent first inclined surface so that the rotating arm gets over the adjacent partition plate 20 t, and the display mechanism C ₂ includes the push button 4. Are engaged with the rotary member 5 so as to be integrally rotatable, and the unit display c listed on the surface of the push button 4 is sequentially exposed to the window hole w provided in the cover cylinder 2 in accordance with the rotation of the rotary member. A liquid ejector characterized by being configured as described above. A lock mechanism C ₃ is provided to prevent the stem 8 from being pushed down when the push button 4 is pushed down a predetermined number of times, and a lock release mechanism C ₄ is provided to release the locked state. The upper surface of the protrusion 17 projecting at a position is used as a locking surface a, and the lower surface of the rotating arm 26 is used as a locked surface b that contacts the locking surface a to prevent the rotating arm 26 from descending. The lock release mechanism C ₄ is configured so that the protrusion is positioned below the wide portion 21 provided between the partition plates 20 at predetermined locations and is engaged with the rotating member 5 so as to be integrally rotatable. The liquid ejector according to claim 1, wherein the push button 4 is rotated to rotate the rotating arm above the locking surface. A lock mechanism C ₃ for preventing the stem 8 from being pushed down when the push button 4 is pushed down a predetermined number of times and a lock release mechanism C ₄ for releasing the locked state are provided. The upper surface of the partition plate at the lower end position of the missing portion 32 having a predetermined vertical width provided on the specific partition plate is used as a locking surface a, and the locked surface in which the lower surface of the rotating arm 26 is in contact with the locking surface a b is configured to prevent the rotating arm 26 from descending, and the unlocking mechanism C ₄ rotates the push button 4 engaged with the rotating member 5 so as to rotate integrally therewith, so The liquid ejector according to claim 1, wherein the rotary arm is configured to rotate. 4. The liquid ejector according to claim 2, further comprising a sound emitting mechanism that emits a sound by the rotation of the rotating member 5 when unlocking is performed by the unlocking mechanism C _4. 5.

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