JP4553200B2 - 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 number of doses 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 has been 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 that is capable of tactilely recognizing the required number of ejections by a lock mechanism, and that has a structure that is different from the conventional one and that has no unreasonable operation and is highly durable. Further, the present invention proposes a liquid ejector capable of releasing the lock state after the required number of ejections and then releasing the required number of times from the beginning. Furthermore, a liquid ejector that makes a sound when unlocking after the locking mechanism is activated and can recognize the unlocking more clearly is proposed. Also, a liquid ejector is proposed in which the required number of ejections can be visually recognized not only by a lock mechanism but also by a display mechanism.

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 is connected to the rotation mechanism C ₁ for rotating 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 the push button. and a lock mechanism C ₂ to prevent an increase of the stem when depressed a predetermined number of push button, the rotating mechanism, and the lower disposed radially on the periphery of the said cover cylinder A plurality of partition plates 20 having a first inclined surface S ₁ respectively, a plurality of second inclined surfaces S ₂ of the inner periphery disposed annularly at the bottom of the cover cylinder, the leading end portion to the pair of the partitioning plates A rotating arm 27 is provided so as to be positioned and have a third inclined surface S ₃ sliding on the first inclined surface S ₁ and a fourth inclined surface S ₄ sliding on the second inclined surface on the upper and lower surfaces, respectively. The rotating member, and the fourth inclined surface slides on the second inclined surface when the rotating member is lowered due to depression of the push button, and the third inclined surface is the first inclined member when the rotating member is raised. The lock arm is configured to slide over one inclined surface so as to get over the adjacent partition plate 20t, and the lock mechanism is provided with a wide partition plate 20a for locking at a predetermined position, and the rotation is provided on the lower surface thereof. The arm can be locked.

As a second means, in the first means, an unlock mechanism C ₃ for releasing the lock state of the lock mechanism C ₂ is provided, and the lock release mechanism moves the push button 4 to a predetermined position of the rotating member 5. The lock arm 27 is configured to be able to be engaged at the rotation position so as to forcibly rotate the lock arm 27.

As a third means, in the said second means, when the lock release by the unlocking mechanism C _3, provided the sound output mechanism emits sound by the rotation of the rotary member 5.

As a fourth means, in the first means, as the recognition system, when the rotation mechanism C ₁ , the lock mechanism C _2, and the rotating arm 27 are shifted to the locked state, the cover The display mechanism C ₄ is configured to allow the display 28 to face the window hole 19 provided at a predetermined position of the cylinder 2.

  As a fifth means, in the first means, the rotating member 5 is located at a predetermined angular distance from the rotating arm 27 and is not in contact with the partition plate 20a for locking and the auxiliary rotation with a short projecting width. A plurality of moving arms 27a are provided in a projecting manner, and a partition plate at a predetermined position corresponding to each auxiliary rotating arm is formed as a narrow partition plate 20b whose inner end surface is recessed outward and the auxiliary rotating arms are not in contact with each other. Configured.

  As a sixth means, in the first means, a plurality of auxiliary turning arms 27a having the same configuration projecting from the turning arm 27 at equal intervals, and at the same distance from the locking partition plate 20a. Is provided with a partition plate 20a for locking corresponding to the auxiliary rotating arm.

In the liquid ejector of the present invention, a predetermined ejected liquid is ejected by a simple operation of pushing the push button 4, and the lock mechanism C ₂ is activated when the necessary number of ejections of the stored liquid is reached. As a result, the ejection of liquid is prevented, and it can be tactilely recognized that the ejected liquid has reached a predetermined amount. The rotating mechanism C ₁ constituting the recognition systems, the fourth inclined surface when falling of the rotation member by depressing the push button slides the second inclined surface, and wherein when rise of the rotating member Since the third inclined surface slides on the first inclined surface and the rotating arm gets over the adjacent partition plate 20t, the operation is easy and the durability is excellent, and the operation is very easy.

Further, when the unlocking mechanism C ₃ is provided, the necessary number of ejections can be ejected from the beginning again after the necessary number of ejections is completed, and this operation can be repeated any number of times according to the capacity of the aerosol container body A. .

Further, when the lock release mechanism C ₃ is configured such that the push button 4 can be engaged at a predetermined rotation position of the rotary member 5, the lock can be released by a simple operation of simply rotating the push button 4 in a predetermined direction. .

When unlocking by the lock release mechanism C _3, the apparatus having provided a sound output mechanism emits sound by the rotation of the rotary member 5, there is an advantage that can be recognized more clearly by the hearing unlocking.

As a recognition system, when the rotation mechanism C ₁ , the lock mechanism C _2, and the rotating arm 27 shift to the locked state, the display 28 is displayed in the window hole 19 provided at a predetermined position of the cover cylinder 2. when constructed from Maseru display mechanism C ₄ Metropolitan also able to recognize the completion of the ejection of the liquid in the visual not only feel, can be more reliably understand the predetermined amount.

  The rotating member 5 projects a plurality of auxiliary rotating arms 27a having a short projecting width that is not in contact with the locking partition plate 20a at positions spaced apart from the rotating arm 27 by a predetermined angle, and the locking partition plate When the partition plate at a predetermined position corresponding to each auxiliary rotating arm is configured as a narrow partition plate 20b whose inner end face is recessed outward and each auxiliary rotating arm is not in contact, the rotating arm 27 The auxiliary rotating arm 27a can stably rotate the rotating member 5 without rattling and can smoothly eject liquid.

  A plurality of auxiliary rotating arms having the same shape projecting from the rotating arm 27 at an equal interval, and a locking partition plate 20a corresponding to the auxiliary rotating arm at an equal interval from the locking partition plate 20a. In the case where it is provided, it can be locked and unlocked a plurality of times while the rotating member 5 makes one turn, which is suitable for the content with a small required amount, and also in this case, stable rotation without backlash. The member can be rotated.

  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 is 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 has a lower end portion fitted and fixed to the outer periphery of the upper end of the aerosol container body A, and a window hole 9 for projecting the nozzle 3, the push button 4 and the like is provided at the top portion. In the illustrated example, a mounting member 2b formed as a separate member is fitted to the lower end portion of the cover cylinder body 2a in which the top wall 11 having the window hole 9 provided at the center portion is extended from the upper end edge of the peripheral wall 10. It is fitted and fixed to the aerosol container body A via the member 2b.

  The mounting 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 rotated from the inner peripheral edge of the base plate portion 13. A guide tube portion 14 for guiding the vertical movement of the member 5 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.

  The lower part of the peripheral wall 10 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 coming out by the concave and convex engaging means, and both are integrated. The diameter of the peripheral wall 10 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 10 below the flange. It is configured so that it can be combined. Further, a window hole 19 is formed at a predetermined position on the peripheral wall 10.

A plurality of partition plates 20 are provided radially on the upper 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 a locking mechanism, which will be described later, the partition plate at a predetermined location is wide and the center side end surface is recessed outwardly to shorten the radial length, and the lower surface has one side edge. Further, the first inclined surface S ₁ is configured as a partition plate 20a for locking in which a radial engaging groove 21 is provided in the middle in the circumferential direction of the lower surface. Further, two partition plates at a predetermined number of positions from the partition plate 20a for locking are formed as narrow partition plates 20b, 20b which are similarly configured by denting the end face on the center side outward to shorten the radial length. It is composed.

  Each partition plate 20, the partition plate 20a for locking, and the narrow partition plate 20b are formed integrally with the cover cylinder 2, but can naturally be formed separately and assembled. Therefore, there is an advantage that it is possible to form the partition plate 20 which is often required, and to prevent the occurrence of sink marks as much as possible.

In addition, a plurality of second inclined surfaces S ₂ are annularly arranged at the lower part of the inner peripheral edge of the cover cylinder 2. Each second inclined surface S ₂ is in principle the same number as the first inclined surface S _1, and is provided at a position where a pair of adjacent first inclined surfaces S ₁ are crossed. In the illustrated example, the base plate portion longitudinal sectional right-angled triangular projection 23 on the upper surface 13 is disposed annularly at equal intervals, it constitutes the inclined surface of the projection 23 as the second inclined surface S _2, respectively , one side edge of the second inclined surface S ₂ is positioned in the circumferential direction intermediate portion of the first inclined surface S ₁ corresponding, also the other side edge of the second inclined surface adjacent to the first inclined surface S ₁ The first inclined surface S ₁ is configured so as to be located in the circumferential intermediate portion.

  The nozzle 3 is fitted to 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 in an upward biased state. In the example of FIG. 1, the bottom end portion of the stem 8 is liquid-tightly fitted to the outer periphery of the stem 8, and the bottomed cylindrical portion for locking the lower end portion of the coil spring 24 protrudes outward 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 is formed with a configuration that allows the nozzle 3 to be pushed in via the rotating member 5, and is fitted to the upper outer peripheral portion of the nozzle 3 via an upper cylindrical wall portion described later of the rotating member 5. The lower surface of the rotating member is placed in contact with the upper surface of a flange portion (described later) of the rotating member via a protrusion 25. Further, a partition wall 26 constituting a lock release mechanism described later is stretched between the inner and outer peripheral walls.

Rotating member 5, the rotatable and around the nozzle 3 which was provided to be pushed down by the upper bias state, and the first inclined surface S ₁ and the sliding is positioned the tip between a pair of the partition plate 20 Rotating arms 27 each having a third inclined surface S ₃ that moves and a fourth inclined surface S ₄ that slides with the second inclined surface S ₂ are provided on the upper and lower surfaces. 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. Further, the rotating arm 27 protrudes outward from a predetermined position at the upper end portion of the lower cylindrical wall portion 5c, and the distal end portion thereof is positioned between the pair of partition plates 20. The third inclined surface S ₃ is inclined in a direction perpendicular to the radial direction, and is slidable when both of the first inclined surfaces S ₁ of the partition plates 20 are in contact with each other with substantially the same inclination angle. It is configured. Similarly, the fourth inclined surface S ₄ is also inclined in a direction orthogonal to the radial direction, and is configured to be slidable when the two inclined surfaces S ₂ are in contact with each other with the same inclination angle.

  The rotation arm 27 is sufficient if at least one rotation arm 27 is present. However, in order to rotate the rotation member 5 with more stable and less rattling, an auxiliary rotation arm can be provided in addition to the rotation 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 of a plurality of cycles is performed while the turning arm 27 is rotated 360 °.

In the case of the illustrated example, two short auxiliary rotating arms 27a, 27a are projected with a circumferential interval therebetween, and each auxiliary rotating arm is formed at a predetermined protruding position on the upper and lower surfaces thereof. Respectively form the same third inclined surface S ₃ and fourth inclined surface S ₄ . The number of such auxiliary rotating arms 27a is not particularly limited, but about two to three seems to be appropriate. Further, the projecting position of such a short auxiliary rotating arm 27a is provided so that the angles formed by the adjacent rotating arm or auxiliary rotating arm are different from each other. The projecting width is a projecting width that abuts the other partition plate and its inclined surfaces without contacting the locking partition plate 20a and the narrow partition plate 20b.

  Further, the distal end portion of the rotating arm 27 is positioned at a level facing the window hole 19 of the cover cylinder peripheral wall 10, and on the distal end surface, an indication 28 indicating the end expressed by letters, symbols, patterns, solid coating, etc. They are provided by appropriate methods such as printing and sticking of sealing materials. The coil spring 24 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. Further, a protrusion 29 constituting a lock release mechanism described later is provided upright at a predetermined position on the upper surface of the flange portion 5b.

In the present invention, a recognition system is provided for recognizing the number of times the nozzle 3 is pushed down, and thus recognizing the number of times the ejection liquid is ejected, that is, the ejection amount. The mechanism C ₁ is connected to the rotating mechanism and includes a lock mechanism C ₂ that prevents the stem 8 from being lifted when the push button 4 is depressed a predetermined number of times.

The rotating mechanism C ₁ includes the partition plate 20 and the rotating member 5, and the fourth inclined surface S ₄ slides on the second inclined surface S ₂ when the rotating member 5 is lowered when the push button 4 is pushed down. In addition, when the rotating member 5 is raised, the third inclined surface slides on the first inclined surface S ₁ so that the rotating arm 27 gets over the adjacent partition plate 20t.

Referring to FIG. 4, the state (a) in FIG. 4 is a state in which the rotating arm 27 is located between the partition plate 20 adjacent to the partition plate 20 a for locking and the partition plate 20 adjacent to the partition plate 20. From this state, when the rotary member 5 is pushed down against the upward biasing force of the coil spring 24 and the stem 8 by pushing down the push button 4, the flange portion 5b and the bottomed cylindrical portion of the nozzle 3 come into contact with each other. The nozzle 3 is pushed down to eject a predetermined amount of liquid. Further, swing arm 27 is lowered to the second inclined surface S ₂ is guided by the initially adjacent partition plate 20t to the fourth inclined surface S ₄ abuts (FIG. 4 (b)), followed by the fourth inclined surface S ₄ slides on the second inclined surface S ₂ and moves downward to the first inclined surface S ₁ (FIG. 4 (c)). Then, when the push button 4 is released, the rotating arm 27 rises and its third The inclined surface S ₃ comes into contact with the first inclined surface S ₁ of the adjacent partition plate 20t (FIG. 4 (d)), and further the sliding arm 27 slides on the first inclined surface S ₁ by the upward biasing force. Get over the partition plate 20t (Fig. 4 (e)).

The lock mechanism C ₂ is configured such that a wide locking partition plate 20a is provided at a predetermined position, and the rotating arm 27 can be locked on the lower surface thereof. Referring to FIG. 4, when the rotary member 27 is pushed down against the upward biasing force of the coil spring 24 and the stem 8 by pushing down the push button 4 from the state (e), similarly, liquid was ejected, also swing arm 27 is lowered to the second inclined surface S ₂ is guided by the partition plate 20a for locking adjacent initially to the fourth inclined surface S ₄ abuts (Figure 4 (f) Then, the fourth inclined surface S ₄ slides on the second inclined surface S ₂ to move downward to the first inclined surface S ₁ (FIG. 4 (g)), and then, when the push button 4 is released, the rotating arm is released. 27 rises and its tip engages with the engaging groove 21 to prevent any further upward movement. As a result, the nozzle 3 and the stem 8 connected to the nozzle 3 remain pushed, Eruption is prevented. Therefore, when the rotating arm 27 is rotated to a predetermined position, the pushed push button 4 does not return, and as a result, the stem 8 which is kept pressed down has a predetermined amount of liquid by the action of the metering valve in the body of the aerosol container. After the eruption, the eruption stops, so that it can be tactilely recognized that a predetermined amount of liquid has been ejected.

Further, in the present embodiment is provided with the lock release mechanism C ₃ to release the locked state by the lock mechanism C _2. This unlocking mechanism C ₃ is configured so that a predetermined amount of ejection can be newly started from the beginning after the ejection of a predetermined amount of ejection is once finished by the locking mechanism C ₂ , and at a predetermined rotational position of the push button 4. The rotating member 5 is configured to be engageable, and the rotating member 5 is rotated by rotating the push button 4 to move the rotating arm 27 engaged with the lower surface of the partition plate 20a for locking. Yes.

Referring to FIG. 4, when the push button 4 is pushed down and rotated while the rotating arm 27 is in the state (h), the partition wall 26 of the push button 4 and the protrusion 29 of the rotary member 5 are in a predetermined position. The rotating member 5 is forcibly rotated by engaging, and the rotating arm 27 is rotated to the position (i). Next, when the pressing of the push button 4 is released, the rotating arm 27 is raised and is used for locking. Abutting on the first inclined surface S ₁ of the partition plate 20a (FIG. 4 (j)), and further sliding on the first inclined surface S ₁ by the upward biasing force, the rotating arm 27 gets over the partition plate 20a (FIG. 4). 4 (k)).

Further, in this embodiment, when the lock release by the unlocking mechanism C _3, is provided with a sound output mechanism emits sound by the rotation of the rotary member 5. In the example shown in the figure, a sound generating vibrator 30 is projected from the tip side of the rotating arm 27, and the vibrator 30 is provided at a predetermined position on the inner surface of the peripheral wall 10 of the cover cylinder 2 when unlocking. It is configured to make a sound overcoming.

  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 into contact with the scalp or the like, 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 at a predetermined rotation angle each time. When the predetermined number of times is reached, the rotating arm 27 engages with the engaging groove 21 below the partition plate 20a for locking, and no further ejection can be performed. At this time, a display 28 such as an end character can be seen from the window hole 19 and the end can be recognized visually. In the next use, the push button 4 is pressed and rotated so that the partition wall 26 is engaged with the protrusion 29 of the rotating member 5 and then further rotated, so that the lower surface of the locking partition plate 20a is rotated. The moving arm 27 is displaced, so that liquid can be ejected and a predetermined amount of liquid can be ejected again.

  In the above example, the rotating member 5 provided with the auxiliary rotating arm 27a shorter than the rotating arm 27 has been described. However, as shown in FIG. By providing the auxiliary rotating arms 27a at equal intervals and by providing the locking partition plates 20a at three equal intervals, the end of the required ejection amount can be recognized three times while the rotating arm 27 makes one round. It can be set as the form which can do. By providing the auxiliary rotating arm 27a having the same length as the rotating arm 27, the rotating member 5 can be rotated more stably and less loosely.

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 principal part expansion explanatory drawing of the sound emission mechanism part of this invention liquid ejector. Example 1 It is explanatory drawing explaining the partition plate of this invention liquid ejector. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Cover cylinder, 3 ... Nozzle, 4 ... Push button, 5 ... Rotating member, 6 ... Ring member, 8 ... Stem, 19 ... Window hole, 20 ... Partition plate, 20a ... Adjacent partition plate, 20b ... Narrow partition plate ,
20t ... adjacent partition plate, 27 ... rotating arm, 27a ... auxiliary rotating arm, 28 ... display,
A ... aerosol container body, C ₁ ... rotating mechanism, C ₂ ... lock mechanism, C ₃ ... unlocking mechanism,
C ₄ ... display mechanism, S ₁ ... first inclined surface, S ₂ ... second inclined surface, S ₃ ... third inclined surface, S ₄ ... fourth inclined surface

Claims (6)

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 rotating mechanism C ₁ that rotates around a nozzle and is capable of being pressed down in an upward biased state is rotated by a predetermined angle by pressing down the push button, and is linked to the rotating mechanism, and the push button is pressed down a predetermined number of times. sometimes a lock mechanism C ₂ to prevent an increase of the stem, the rotary mechanism, and each of the first inclined to the lower surface disposed radially on the periphery of the said cover cylinder A plurality of partition plates 20 having a surface S _1, a plurality of second inclined surfaces S ₂ of the inner periphery disposed annularly at the bottom of the cover cylinder, and the second to position the tip portion to the pair of the partitioning plates The rotating member provided with a rotating arm 27 protruding from the upper and lower surfaces, respectively, a third inclined surface S ₃ that slides with one inclined surface S ₁ and a fourth inclined surface S ₄ that slides with the second inclined surface. The fourth inclined surface slides on the second inclined surface when the rotating member is lowered due to depression of the push button, and the third inclined surface slides on the first inclined surface when the rotating member is raised. The lock mechanism is configured to move over the adjacent partition plate 20t, and the lock mechanism is provided with a wide lock partition plate 20a at a predetermined position, and the rotary arm can be locked on the lower surface thereof. A liquid ejector characterized by comprising An unlock mechanism C ₃ for releasing the lock state of the lock mechanism C ₂ is provided, and the lock release mechanism is configured so that the push button 4 can be engaged at a predetermined rotational position of the rotating member 5 to rotate in the locked state. The liquid ejector according to claim 1, wherein the arm 27 is configured to forcibly rotate the arm 27. 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 ₃ . As the recognition system, when the rotation mechanism C ₁ , the lock mechanism C _2, and the rotating arm 27 are shifted to the locked state, a display 28 is displayed on the window hole 19 provided at a predetermined position of the cover cylinder 2. The liquid ejector according to claim 1, comprising a display mechanism C ₄ to be exposed.   The rotating member 5 is provided with a plurality of auxiliary rotating arms 27a having a short projecting width that are not in contact with the locking partition plate 20a at positions spaced apart from the rotating arms 27 by a predetermined angle. 2. The liquid ejector according to claim 1, wherein the partition plate at a predetermined position corresponding to the arm is configured as a narrow partition plate 20b whose inner end face is recessed outward and the auxiliary rotating arms are not in contact with each other.   A plurality of auxiliary rotating arms 27a having the same shape projecting at equal intervals from the rotating arm 27, and a locking partition plate 20a corresponding to the auxiliary rotating arm at equal intervals with the locking partition plate 20a. The liquid ejector according to claim 1, further comprising:

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