JP5778011B2 - Syringe type ejector - Google Patents

Description

  The present invention relates to a syringe-type ejector having a nozzle that can be attached to and detached from a tip tube provided in a syringe, and in which a liquid content from a spout of the nozzle is poured out in a foam or mist form through a barrier member. is there.

  Known syringe-type ejectors have a spray nozzle that can be attached to and detached from a tip cylinder provided in a barrel (syringe), and can spray the content liquid from a spout through a valve disposed in the spray nozzle. (For example, refer to Patent Document 1).

JP 2001-137344 A

  However, in such a conventional syringe-type ejector, when the nozzle is removed, the distal end cylinder of the syringe is opened, so that the content liquid cannot be sealed in advance to form a cartridge. In addition, if the syringe is filled with the content liquid for the purpose of spraying a small amount, it is not suitable for spraying a small amount of the content liquid because the usability is deteriorated due to the downsizing of the barrel.

  An object of the present invention is to provide a novel syringe-type ejector that can be poured into a foam or mist without sacrificing operability even with a small amount of content liquid while making the content liquid into a cartridge. It is to provide.

The present invention extends a rod disposed in a through-hole formed in a distal end cylindrical portion of a syringe to a piston slidably disposed in the syringe and pumps the piston between the rod and the distal end cylindrical portion. An operating device that forms a passage for the air,
A cylindrical member having a plunger that fills the content liquid and pushes out the content liquid using a pressing force from the rod as an urging force; a nozzle that houses the cylindrical member inside and is attached to the distal end cylindrical portion of the syringe; and a nozzle A liquid member housed inside and pushed out from the tubular member, and a barrier member that forms a mist-like or foamy content liquid through the air pumped by the piston,
The cylindrical member is sealed with a breakable resin plug and the rear end is sealed with a plunger, thereby forming a cartridge body that forms a sealed space between the plunger and the resin plug.
The nozzle can store the cartridge main body through an opening formed at the rear end thereof, and through the resin stopper of the cartridge main body pushed in by being attached to the distal end cylindrical portion, the sealed space is led to the barrier member. It is an auxiliary cartridge in which a hollow projecting member is accommodated.

  In this invention, it is preferable to provide the recessed part into which a projection member inserts in a resin stopper. Moreover, in this invention, when a plunger is inserted through the opening part formed in the rear end of the said cylindrical member inside the cylindrical member, the inner groove which escapes the air of the filling space of a content liquid can be provided.

  The present invention seals the tip of the cylindrical member with a breakable resin plug, fills the content liquid from the opening formed at the rear end, and then seals the rear end with a plunger in advance. The cartridge main body sealed can be constituted. For this reason, it is possible to form a cartridge only by disposing the main body in the auxiliary cartridge using the nozzle incorporating the barrier member and the protruding member as the auxiliary cartridge.

  In addition, since the auxiliary cartridge is a member separately from the cartridge body, a barrier member such as a spray valve (spindle element) or a mesh ring or a protruding member is previously incorporated in the nozzle. The content liquid can be sealed and held separately as a cartridge body filled with the content liquid without contacting the content liquid.

  Also, if the cartridge is mounted on an operating instrument to form a syringe-type ejector, the hollow cylindrical protruding member penetrates the resin stopper by pushing the cartridge main body in the auxiliary cartridge when the cartridge is mounted. The sealed space is communicated with the barrier member. Thereby, the syringe type ejector in which the cartridge is mounted on the operating instrument can be taken out in the form of foam or mist in a volume corresponding to the cylindrical member by a simple operation of pushing the rod together with the piston.

  In addition, since the plunger for pushing out the content liquid is operated by the rod pushed out by the piston, a cylindrical member (cylinder) and a plunger (piston) can be adopted as a mechanism for filling and pumping the content liquid. A syringe (cylinder) and a piston can be adopted as a mechanism for driving the plunger. In this case, only the mechanism for filling and pumping the content liquid, that is, only the cartridge body can be reduced without downsizing the mechanism for driving the plunger. Therefore, the present invention is effective when it is desired to take out a small amount of the content liquid in the form of foam or mist without impairing operability.

  As described above, according to the present invention, a small amount of content liquid can be poured into a foam or mist without sacrificing operability while making the content liquid into a cartridge.

It is a longitudinal cross-sectional view which shows the syringe type nasal drop ejector which is one form of this invention. It is a longitudinal cross-sectional view which expands and shows the form partially. The XX sectional view and YY sectional view are shown with the longitudinal sectional view showing the cartridge concerning the form. It is an expansion perspective view which shows the rear end of the cylindrical member based on the form. (a) is a longitudinal cross-sectional view which shows the assembly | attachment process of the auxiliary cartridge which concerns on the same form, (b) is a longitudinal cross-sectional view which shows an auxiliary cartridge. It is a longitudinal cross-sectional view which expands the same form partially and shows the state at the time of the injection. It is a longitudinal cross-sectional view which shows the state which assembled | attached the cartridge main body to the auxiliary cartridge and comprised the cartridge. (a) is a longitudinal sectional view showing a cartridge main body according to the embodiment, and (b) is a longitudinal sectional view showing a manufacturing process of the cartridge main body.

  Hereinafter, with reference to drawings, one form of a syringe type ejector which is the present invention is explained in detail.

  In FIG. 1, the code | symbol 1 is a syringe-type nasal drop ejector which is one form of this invention. The nasal spray ejector 1 includes a cartridge 1A and an operation instrument 1B.

  Reference numeral 2 denotes an air syringe as an injection outer cylinder. The air syringe 2 is integrally provided with a distal end cylindrical portion 2c via an annular shoulder portion 2b formed at one end of a hollow body portion 2a. The distal end cylinder portion 2c has a smaller diameter than the body portion 2a, and a through hole is formed inside thereof so as to communicate with a hollow space formed inside the body portion 2a. Further, the air syringe 2 is integrally provided with a distal outer cylinder 2d surrounding the distal cylinder 2c. Further, the air syringe 2 is integrally provided with a finger hook portion 2e at the rear end thereof.

  Reference numeral 3 denotes an operation shaft. The operation shaft 3 has an air piston 3a, and a pressing portion 3b is provided at the rear end. The air piston 3 a is slidably held inside the body 2 a of the air syringe 2. Thereby, if a user puts a finger on the finger hook part 2e of the air syringe 2 and presses the pressing part 3b of the operating shaft 3, the air piston 3a pushes out the air in the air syringe 2 toward the distal end cylinder part 2c. be able to.

  Further, the operation shaft 3 integrally has a plunger rod 3c as a rod. The plunger rod 3c extends from the air piston 3a toward the distal end cylindrical portion 2c of the air syringe 2, and is disposed in a through hole formed inside the distal end cylindrical portion 2c. The plunger rod 3c has a smaller diameter than the through hole formed inside the distal end cylindrical portion 2c. Thereby, as shown in FIG. 2, the plunger rod 3c has an annular first passage (hereinafter referred to as "first air passage") r1 between the tip cylinder portion 2c and the air pumped by the air piston 3a. Form.

  The operation shaft 3 has an annular seal member 4 to improve the sealing performance in the air syringe 2. In the present invention, the “piston” for pushing out the air in the air syringe 2 includes not only the air piston 3 a but also those related to the combination of the air piston 3 a and the seal member 4. Further, the operation shaft 3 is interposed between the air syringe 2 and an elastic member 5 such as a return spring so that the operation shaft 3 is automatically returned to the initial position when the operation shaft 3 is pushed in and then released. It is configured.

  The operating instrument 1B is configured as described above, while the cartridge 1A is configured as follows.

  Reference numeral 6 denotes a cylindrical member filled with the content liquid (nasal spray) C. As shown in FIG. 3, the cylindrical member 6 has a through hole on the inner side, and a protrusion 6 a is integrally provided on the outer side. As shown in the XX cross section of the figure, the protrusions 6a are provided in a plurality (four in this embodiment) at intervals in the circumferential direction (around the axis O).

  A resin plug 7 made of a soft material having elasticity such as rubber is attached to the tip of the cylindrical member 6. The resin plug 7 has a cylindrical body portion 7 a that fits into an opening formed at the tip of the cylindrical member 6. An edge portion 7b is integrally provided at the upper end of the cylindrical portion 7a. The edge portion 7b is an annular body that circulates around the cylindrical body portion 7a. Thus, when the cylindrical portion 7 a is fitted into the cylindrical member 6, the resin plug 7 is prevented from falling into the cylindrical member 6 by contacting the tip of the cylindrical member 6.

  An opening A1 is formed at the rear end of the cylindrical member 6. The opening A1 is sealed by a plunger 8 arranged inside the cylindrical member 6. The plunger 8 is slidably held inside the cylindrical member 6. As shown in FIG. 2, the plunger 8 is in contact with the tip of the plunger rod 3c through the opening A1. Thereby, if the operating shaft 3 is pushed into the air syringe 2, the plunger 8 can push out the content liquid C toward the resin plug 7 using the pressing force from the plunger rod 3 c as an urging force.

  Reference numeral 9 denotes a nozzle attached to the distal end cylindrical portion 2c. The nozzle 9 has a body portion 9a for accommodating the cylindrical member 6 inside, and a flange portion 9b is integrally provided at the rear end thereof. The flange portion 9b functions as a screw portion, and is detachably screwed into a screw portion 2s formed inside the distal end outer cylinder 2d. Thereby, the nozzle 9 can be detachably attached to the operating instrument 1B by being screwed into the air syringe 2.

  Reference numeral 10 denotes a mesh ring. The mesh ring 10 is formed by fixing the mesh member 10b to one end surface of the ring member 10a. The mesh ring 10 is inserted through an opening A 3 formed at the rear end of the nozzle 9. Thereby, the mesh ring 10 is arrange | positioned adjacent to the opening part A4 side formed in the front end among the insides of the nozzle 9. FIG.

  Reference numeral 11 denotes a hollow projecting member disposed inside the nozzle 9 after the mesh ring 10. As shown in FIG. 3, the protruding member 11 has a base 11 a and is fixed inside the nozzle 9 by fitting and holding the base 11 a inside the nozzle 9. A needle portion 11b is integrally provided on the base 11a. The needle portion 11b has a tip 11c that is inclined toward the tip and has a hooked shape, and a through passage r0 is formed on the inside thereof.

  The nozzle 9 accommodates the tubular member 6 in the body portion 9a through an opening A3 formed at the rear end thereof. As shown in FIG. 3, the needle portion 11 b passes through the cylindrical portion 7 a of the resin plug 7 and communicates with the content liquid C filling space formed in the cylindrical member 6. Thereby, the protruding member 11 allows the filling space of the content liquid C to communicate with the mesh ring 10 through the through passage r0 formed in the needle portion 11b.

  Furthermore, the cylindrical member 6 is slidably contacted with the inner peripheral surface of the nozzle 9 by the projection 6a. Thereby, a gap is formed between the cylindrical member 6 and the nozzle 9. In addition, as shown in FIG. 4, a notch 6b is formed at the rear end of the cylindrical member 6 at a position aligned with the protrusion 6a in the circumferential direction. Thus, as shown in FIG. 2, when the nozzle 9 is attached to the distal end cylindrical portion 2c, the distal end cylindrical portion 2c comes into contact with the rear end of the cylindrical member 6, so that the rear end side of the tubular member 6 and the distal end cylinder Between the tip of the part 2c, an opening that leads to a gap between the tubular member 6 formed by the notch 6b and the nozzle 9 is formed.

  Thereby, when the nozzle 9 containing the cylindrical member 6 is attached to the distal end cylindrical portion 2c, as shown in FIG. 2, between the rear end side of the cylindrical member 6 and the distal end of the distal end cylindrical portion 2c, A second passage (hereinafter referred to as “second air passage”) r2 through which air from the air piston 3a pushed out through the first air passage r1 passes is formed. Further, a third passage (hereinafter referred to as “third air passage”) r3 through which the air pushed out through the second air passage r2 passes is formed between the tubular member 6 and the nozzle 9.

  Further, as shown in FIG. 5A, the nozzle 9 is configured such that the inner diameter φ1 of the space for housing the protruding member 11 together with the cylindrical member 6 is larger than the inner diameter φ2 of the space for storing the mesh ring 10. ing. Accordingly, as shown in FIG. 3, a fourth passage (hereinafter referred to as “fourth air passage”) r4 through which the air pushed out through the third air passage r3 passes is provided between the nozzle 9 and the protruding member 11. It is formed. A plurality of protrusions 9 c are provided inside the nozzle 9 at intervals in the circumferential direction. As shown in FIG. 5 (b), the protrusion 9c hooks the base 11a of the protrusion member 11 and holds the protrusion member 11 in a retaining manner. Since the protrusions 9c are provided at intervals in the circumferential direction, the air flow is ensured in the third air passage r3 and the fourth air passage r4.

  Further, at the upper end of the base 11a, as shown in the YY cross section of FIG. 3, a cylindrical portion 11d and a groove portion 11e extending radially from the cylindrical portion 11d are formed. The groove portions 11e communicate with each other via an annular groove portion 11f surrounding the cylindrical portion 11d. In addition, the cylindrical part 11d provided at the upper end of the base 11a is configured to be lower than the groove depths of the groove part 11e and the annular groove part 11f. As a result, a joining portion S communicating with the air passages r1 to r3 is formed at the position of the cylindrical portion 11d between the mesh ring 10 and the protruding member 11.

  In the nasal spray ejector 1, when the operating shaft 3 of the operating instrument 1B is pushed in, as shown by the solid line in FIG. 6, the air piston 3a pushes the air in the air syringe 2 toward the distal end cylindrical portion 2c, and the plunger When the rod 3c pushes the plunger 8 arranged inside the cylindrical member 6, the content liquid C is passed from the through passage r0 of the protruding member 11 to the mesh ring 10 as shown by the solid white line in FIG. It pushes out to the junction part S formed in this.

  On the other hand, the air pushed out by the air piston 3a passes through the air passages r2 to r4 from the air passage r1 formed between the distal end cylindrical portion 2c of the air syringe 2 and the plunger rod 3c, as shown by the solid line in FIG. It is pushed out to the merging part S through. As a result, as shown by a bold solid line in the figure, the content liquid C pushed out to the plunger 8 at the junction S is mixed with the air pushed out to the air piston 3a, and then the opening of the nozzle 9 through the mesh ring 10 is mixed. It can be sprayed in the form of bubbles from A4 to the outside world. Therefore, according to the present embodiment, it is possible to take out a volume corresponding to the cylindrical member 6 in a bubble shape by a simple operation of simply pushing the piston shaft 3.

  Moreover, parts other than the operating instrument 1B can be configured as the cartridge 1A as described above. As shown in FIG. 7, the cartridge 1A has a cartridge body 1A-1. As shown in FIG. 8A, the cartridge body 1 </ b> A- 1 is sealed at the front end of the cylindrical member 6 with a resin plug 7 and at the rear end with a plunger 8. Thus, the cartridge body 1A-1 forms a sealed space for storing the content liquid C between the plunger 8 and the resin plug 7, as shown in FIG.

  As shown in the figure, the resin plug 7 is integrally provided with a bottom portion 7c at the lower end of the cylindrical body portion 7a. Thus, as shown in FIG. 8 (b), if the cylindrical member 6 is arranged so that the resin stopper 7 faces downward, the content liquid C is passed through the opening A1 formed at the rear end of the cylindrical member 6. Can be filled. After filling the content liquid C, as shown in the figure, the opening A1 can be sealed by passing the plunger 8 through the opening A1.

  In addition, in this embodiment, two inner grooves 6 g are formed inside the cylindrical member 6. The inner groove 6g is formed with a certain length from the rear end of the tubular member 6. As shown in FIG. 8A and the like, the inner groove 6g forms an air vent passage between the plunger 8 and the filling space of the content liquid C to the outside. As a result, as shown in FIG. 8 (b), when the plunger 8 is inserted through the opening A 1 formed at the rear end of the cylindrical member 6, excess air remaining in the filling space of the content liquid C is released. Can do.

  Further, since the nozzle 9 can be attached to and detached from the air syringe 2 while the cylindrical member 6 is accommodated, the auxiliary cartridge 1A-2 can be obtained as shown in FIG. The auxiliary cartridge 1A-2 constitutes the cartridge 1A together with the cartridge body 1A-1. Further, the auxiliary cartridge 1A-2 is configured by housing two mesh rings 10 inside the nozzle 9, as shown in FIG. The two mesh rings 10 are sequentially accommodated so that each mesh member 10b is arranged on the upstream side and the downstream side when the content liquid C is ejected, as shown in FIG. Further, the auxiliary cartridge 1 </ b> A- 2 stores a protruding member 11 on the downstream side of the two mesh rings 10.

  As shown in FIG. 7, the auxiliary cartridge 1A-2 can accommodate the cartridge body 1A-1 through an opening A3 formed at the rear end thereof. Thus, the cartridge 1A can be configured by a simple operation of simply storing the cartridge main body 1A-1 in the auxiliary cartridge 1A-2. According to the present invention, as shown in FIG. 7, the cartridge main body 1A-1 is set in advance in the auxiliary cartridge 1A-2 so that it can be distributed in the state of the cartridge 1A, and FIG. As shown in FIG. 7, the cartridge body 1A-1 and the auxiliary cartridge 1A-2 can be distributed as separate sets.

  As shown in FIG. 7, since the bottom portion 7 c is integrally provided at the lower end of the cylindrical body portion 7 a, the resin plug 7 extends toward the inside of the cylindrical member 6 at the center portion of the resin plug 7. A recess G is formed. In this recess G, as shown in the figure, the needle portion 11b can be slidably accommodated. The resin plug 7 is made of a resin that can be broken by the needle portion 11 b of the protruding member 11. As a material constituting the resin stopper 7, for example, a soft material having elasticity such as rubber can be used.

  Thus, when the user uses the nasal spray ejector 1, if the cartridge 1 </ b> A shown in FIG. 7 is attached to the operating instrument 1 </ b> B, the needle portion 11 b of the protruding member 11 is as shown in FIG. The sealed space can be communicated with the mesh ring 10 through the bottom portion 7c of the resin plug 7 by being pushed by being attached to 2c. When the operating shaft 3 is pushed into the air syringe 2, the plunger 8 is directed toward the mesh ring 10 from the through passage r0 formed in the protruding member 11 by using the pressing force from the plunger rod 3c as a biasing force as described above. The content liquid C can be pushed out.

  As described above, in this embodiment, the front end of the cylindrical member 6 is sealed by the breakable resin plug 7 and filled with the content liquid C from the opening A1 formed at the rear end, and then the rear end is moved to the plunger. The cartridge main body 1A-1 in which the content liquid C is sealed in advance can be configured simply by sealing with 8. Therefore, the nozzle 9 incorporating the mesh ring 10 and the protruding member 11 is used as the auxiliary cartridge 1A-2, and the cartridge 1A can be formed simply by disposing the cartridge body 1A in the auxiliary cartridge 1A-2.

  In addition, since the auxiliary cartridge 1A-2 has the mesh ring 10 and the protruding member 11 built in the nozzle 9 in advance separately from the cartridge body 1A-1, the mesh ring 10 built in the nozzle 9 and the like. The content liquid C can be sealed and held separately as the cartridge body 1A-1 filled with the content liquid C without bringing the content liquid C into contact therewith.

  Further, in this embodiment, since the cartridge 1A is mounted on the operating instrument 1B to form the syringe-type ejector 1, the distal end cylindrical portion 2c of the air syringe 2 is placed in the cartridge in the auxiliary cartridge 1A-2 when the cartridge 1A is mounted. By pushing in the main body 1 </ b> A- 1, the hollow projecting member 11 penetrates the resin plug 7 and allows the sealed space to communicate with the mesh ring 10. As a result, in this embodiment in which the cartridge 1A is mounted on the operating instrument 1B, the capacity corresponding to the cylindrical member 6 from the tip opening A4 of the nozzle 9 can be simply operated by pushing the plunger rod 3c together with the air piston 3a. Can only be taken out in foam.

  Further, since the plunger 8 for pushing out the content liquid C is operated by the plunger rod 3c pushed out by the air piston 3a, as a mechanism for filling and pumping the content liquid C, a cylindrical member (cylinder) 6 and a plunger ( A piston 8 can be employed, and an air syringe (cylinder) 2 and an air piston 3 a can be employed as a mechanism for driving the plunger 8. In this case, only the mechanism for filling and pumping the content liquid C, that is, only the cartridge main body 1A-1 (the cylindrical member 6, the resin plug 7 and the plunger 8) is small without downsizing the mechanism for driving the plunger 8. Can be Therefore, this embodiment is effective when it is desired to take out a small amount of the content liquid C in a foam state without impairing operability.

  Thus, according to the present embodiment, while the content liquid C is made into a cartridge, even a small amount of the content liquid C can be poured out in a bubble shape without impairing the operability.

  In particular, as in the present embodiment, if the concave portion G into which the protruding member 11 is inserted is provided in the resin plug 7, the cartridge main body 1A-1 can be reliably opened while the sealing performance is secured, and further after opening. Sealability can also be secured.

  The above description only shows one embodiment of the present invention, and various modifications can be made within the scope of the claims. For example, the air passage r3 formed between the tubular member 6 and the nozzle 9 forms an outer groove at an interval in the circumferential direction of the tubular member 6 to form a gap between the nozzle 9 and the like. The formation method is not limited. The same applies to the air passage r2, the other air passage r4, and the merging portion S that are formed between the tubular member 6 and the tip tube portion 2c. Further, in this embodiment, the resin plug 7 is configured separately from the cylindrical member 6 so as to be assembled to the cylindrical member 6, but according to the present invention, the resin plug 7 It can also be formed integrally with the tubular member 6. According to the present invention, instead of the mesh ring 10, a barrier member such as a spray valve (spindle element) can be employed to pour out in a mist form.

  The present invention can be applied to various devices as long as it is an ejector intended to eject the content liquid mixed with air. Also, the type of contents is not limited.

DESCRIPTION OF SYMBOLS 1 Syringe-type nasal spray ejector 1A Cartridge 1A-1 Cartridge main body 1A-2 Auxiliary cartridge 1B Operation instrument 2 Air syringe 2a Body part 2b Shoulder part 2c Tip cylinder part 2d Tip outer cylinder part 2e Finger hook part 3 Operation shaft 3a Air Piston 3b Shaft pressing part for operation 3c Plunger rod (rod)
4 Seal member 5 Elastic member 6 Cylindrical member 6a Outer groove (air passage)
6b Notch (air passage)
6g inner groove (air vent passage)
7 Protrusion member 7a Base portion 7b Needle portion 8 Plunger 9 Nozzle 9a Body portion 9b Flange portion 9c Protrusion 10 Mesh ring 10a Ring member 10b Mesh member A1 Rear end opening portion of cylindrical member A3 Nozzle rear end opening portion A4 Nozzle tip Opening portion r0 Through passage passage r1 First air passage r2 Second air passage r3 Third air passage r4 Fourth air passage S Junction

Claims (3)

The passage of the air pressure-fed by the piston between the rod and the tip tube portion is extended between the rod and the tip tube portion in the through hole formed in the tip tube portion of the syringe to the piston slidably arranged in the syringe. An operating instrument to form a
A cylindrical member having a plunger that fills the content liquid and pushes out the content liquid using a pressing force from the rod as an urging force; a nozzle that houses the cylindrical member inside and is attached to the distal end cylindrical portion of the syringe; and a nozzle A liquid member housed inside and pushed out from the tubular member, and a barrier member that forms a mist-like or foamy content liquid through the air pumped by the piston,
The cylindrical member is sealed with a breakable resin plug and the rear end is sealed with a plunger, thereby forming a cartridge body that forms a sealed space between the plunger and the resin plug.
The nozzle can store the cartridge main body through an opening formed at the rear end thereof, and through the resin stopper of the cartridge main body pushed in by being attached to the distal end cylindrical portion, the sealed space is led to the barrier member. A syringe-type ejector comprising an auxiliary cartridge in which a hollow projecting member is accommodated.   2. The syringe-type ejector according to claim 1, wherein a recess into which the protruding member is inserted is provided in the resin stopper.   3. An inner groove for releasing air in a liquid filling space when a plunger is inserted through an opening formed at a rear end of the cylindrical member, inside the cylindrical member according to claim 1 or 2. A syringe type ejector.

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