JP4733617B2 - Medical paste injection kneader and medical paste injection kneader - Google Patents

Description

  The present invention relates to a medical paste injection kneader and a medical paste injection kneader material for kneading and injecting a medical paste.

At present, in the medical field including dentistry, for example, calcium phosphate bone paste is injected into the body to make up for a defect in a living bone or a tooth, or an artificial bone made of metal, ceramics, or the like is adhered to a living bone. Yes.
For example, Patent Document 1 discloses a paste injection kneader for kneading and injecting the paste. This paste injection kneader includes a cylinder having an opening at one end and a nozzle portion at the other end, a partition that is slidable in the axial direction inside the cylinder, and a shaft portion insertion penetrating through the center of the partition. A shaft portion that is capable of reciprocating in the axial direction and entering and exiting the through hole for inserting the shaft portion through the hole and rotating around the axis; and a portion of the shaft portion located in the cylinder It has the stirring part provided and the handle | steering-wheel part similarly provided in the part located outside the cylinder of a shaft part. Then, the paste raw material and the liquid for curing are filled in the cylinder, and the paste raw material and the liquid are sufficiently kneaded by the stirring unit by combining the operation of moving the shaft in and out and the operation of rotating, and the finished paste Is pressed with a partitioning tool and sent out from the nozzle part to a necessary part (see Patent Document 1: Paragraph 0043 to Paragraph 0045).
JP-T-2003-527197

  In the paste kneading and injector of Patent Document 1, when pushing out the finished paste from the cylinder, the shaft portion that is no longer needed is first broken, and then the upper surface of the divider is pressed using a dedicated mechanical injection gun. However, there is a possibility that it takes time to break the shaft portion, and there is a disadvantage that the cost is high because a dedicated injection gun is essential.

A cylinder having one end open and a nozzle portion at the other end, a partition that is slidable in the axial direction inside the cylinder, a stopper that can be moored / released on the opening side of the cylinder, and the partition A shaft portion that is inserted into a through hole for inserting a shaft portion penetrating the center of the tool and capable of reciprocating in an axial direction entering and exiting the through hole for inserting the shaft portion and a rotational motion about the axis; A stirring portion provided in a portion of the shaft portion located in the cylinder, a handle portion provided in a portion of the shaft portion located outside the cylinder, and a shaft portion into the through hole for inserting the shaft portion of the divider by inhibiting the progression comprises, connected to the member can be mounted to the shaft portion so as to be moved brought into the cylinder together also partition member with a force pushed into the cylinder shaft portion, the connecting member Provides said partition member, and the engaging portion or the handle portion is formed on the shaft portion of the handle portion near the spacer forms der interposing Ru medical paste injected kneader during.

In addition, according to a second aspect of the present invention, the connecting member has a substantially C-shaped cross section in which an axially split portion is provided at one location on the outer periphery of the pipe material, and the split portion is expanded. The medical paste injection kneader according to claim 1 , which is detachably attached to the shaft portion.

According to a third aspect of the present invention, there is provided the medical paste injecting and kneading device according to the second aspect , wherein the connecting member has a reduced thickness on the side facing the split portion.

Further, as described in claim 4, wherein the stirring unit is to provide a medical paste injection kneader according to any one of claims 1 to 3 is a blade-shaped protruding radially from the shaft portion.

Further, as described in claim 5, wherein the paste to provide a medical paste injection kneader according to any one of claims 1 to 4 is a bone paste.

Further, as described in claim 6 , the medical paste injection kneader according to claim 5 , wherein the bone paste is mainly composed of calcium phosphate.

Further, as described in claim 7, wherein the calcium phosphate is to provide a medical paste injection kneader according to claim 6 as a main component tetracalcium phosphate and calcium hydrogen phosphate.

Further, as described in claim 8, one component of the paste material is powders, medical according to any one of claims 1 to 7 is for a paste by kneading its powder and liquid A paste injection kneader is provided.

Further, as described in claim 9 , there is provided a medical paste injection kneader according to claim 8 , wherein the cylinder is previously filled with a paste raw material powder.

Further, as described in claim 1 0, a liquid for curing the powder of the paste material, according to claim 8 so as to inject from the nozzle portion of the cylinder relative to the powders of the paste material in the cylinder or 9 The medical paste injection kneader described in 1. is provided.

Further, as described in claim 1 1, a liquid for curing powder paste raw material, medical paste injection kneader according to any one of claims 8 to 1 0 is a polysaccharide aqueous solution I will provide a.

Further, as described in claim 1 2, and the medical paste injection kneader according to any one of claims 9 to 1 1, and a liquid injection container filled with a liquid for curing the powder of the paste material A medical paste injection kneading device is provided.

  The medical paste injection kneader of the present invention is free to move in the axial direction of the shaft portion in the shaft insertion through-hole of the partitioning tool and to move around the axis, and the degree of freedom of movement of the stirring portion in the cylinder Therefore, efficient stirring work is possible. In addition, after the paste kneading is completed, the connecting member inhibits the progress of the shaft portion into the through hole for inserting the shaft portion of the partition member, so that the partition member is brought into the cylinder together with the force of pushing the shaft portion into the cylinder. Since it is moved, there is an effect that it does not take time and effort to break the shaft portion as in Patent Document 1, and the cost is reduced because a dedicated injection gun is unnecessary.

Further, the consolidated member, the partition member and the handle portion, or due to the spacers form to be interposed between the partition member and the handle portion engaging portion formed on the shaft portion near, easy to handle structure is simple.

The medical paste injection kneader according to claim 2 , wherein the connecting member has a substantially C-shaped cross section in which an axially split portion is provided at one location on the outer periphery of the pipe material. Is expanded and removed from the shaft portion, so that the connecting member can be easily and reliably attached to and removed from the shaft portion.

Further, in the medical paste injection kneader according to claim 3 , since the thickness of the connecting member on the side facing the dividing portion is reduced, the thin portion is easily bent so that the opening and closing of the dividing portion can be performed. Becomes easier.

Further, in the medical paste injection kneader according to claim 4 , since the stirring part is formed in a blade shape protruding radially from the shaft part, the stirring part can be formed almost flat, and the end face of the divider The protrusion of the stirring portion can be reduced in a state where it is brought into contact with. Since the stirrer is sandwiched between the partition and the nozzle part, the paste remains in the space generated by the bulge of the stirrer, but by reducing the bulge of the stirrer, the remainder of such paste can be negligible. .

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a longitudinal sectional view of a medical paste injection kneader, FIG. 2 is a sectional view taken along line XX of FIG. 1, FIG. 3 is a bottom view of a stopper, FIG. 4 is a sectional view taken along line YY of FIG. 5 is a longitudinal sectional view of the partitioning tool, FIG. 6 is a perspective view of the shaft portion, the handle portion, and the stirring portion, FIG. 7 is a sectional view taken along the line ZZ in FIG. 1, and FIG. (B) is a front view, (c) is a longitudinal sectional view, FIG. 9 (a) is a plan view of a connecting member, (b) is a front view, (c) is a longitudinal sectional view, and FIG. 10 is a state immediately before injection. FIG. 11 is a longitudinal sectional view of the medical paste injection kneader shown in FIG. 11, and FIGS. 12 (a), 12 (b), 13 (a), ( 14 (a), 14 (b) and 14 (c) are perspective views showing other forms of the handle portion, FIGS. 15 (a) and 15 (b) are longitudinal sectional views showing the liquid injection container, and FIG. Other stopper Longitudinal sectional view of a medical paste injection kneader showing a state, FIG. 17 (a), (b) is a sectional view showing a state where the engagement of the connecting member to the engaged portion of the shaft portion.

  The medical paste injection kneader 1 of the present invention includes a cylinder 2, a piston 3, a stopper 4, and a connecting member 5.

[Cylinder]
The cylinder 2 includes a cylindrical body 2a having a predetermined length, a nozzle portion 2b formed on one end side of the cylindrical body 2a, and a flange 2c formed on the other end opening side of the cylindrical body 2a.

  As shown in FIGS. 1 and 2, the flange 2c of the cylinder 2 extends to the outside from the opening side end surface of the cylindrical body 2a, and cuts two portions of a circle centering on the axis of the cylinder 2 in parallel. In other words, the pair of curved sides 2d and 2d and the pair of orthogonal sides 2e and 2e form an oval shape, and the oval curved sides 2d and 2d project greatly outside the cylindrical body 2a.

  On the other hand, the nozzle portion 2b of the cylinder 2 has a screw 2f (for example, a luer lock screw) formed on the outer periphery. The cap 2g is screwed onto the screw 2f to close the hole of the nozzle portion 2b. The hole of the nozzle part 2b can be opened by removing. Further, the cap 2g can be removed from the screw 2f of the nozzle portion 2b and replaced with the tube 6 (see FIG. 11) or the like.

[piston]
The piston 3 includes a partition 3a, a shaft portion 3b, a stirring portion 3c, and a handle portion 3d.

[Piston-Partition]
The partition 3a is a part made of a synthetic resin that partitions the inside and outside of the cylinder 2 and is slidable in the axial direction. As shown in FIG. 5, a pipe having a through hole 300 for inserting a shaft portion at the center. Body 301, annular first housing 302 projecting from the outer periphery of the upper end of the tubular body 301, annular second housing 303 projecting below the body 301, and projecting from the outer periphery of the lower end of the tubular body 301 An annular third housing 304, a rib-shaped reinforcing member 305 connecting the annular second housing 303 and the annular third housing 304, and four annular members provided at equal intervals, and an annular first housing 302. A rib-shaped positioning reinforcing member 306 that connects the annular second housing 303, an outer seal portion 307 provided in the annular third housing 304, and an inner seal provided on the inner periphery of the through hole 300 for inserting the shaft portion. Part 308.

  The positioning reinforcing member 306 is positioned between the annular first casing 302 and the annular second casing 303, and is formed to connect the annular first casing 302 and the annular second casing 303. And a length from a peripheral surface of the tube body 301 to an edge portion in a direction perpendicular to the axial direction of the tube body 301 while having a positional relationship parallel to each other. Is set to an appropriate length so as not to be longer than the radial length of the annular first casing 302 and the annular second casing 303, and the shaft portion insertion through-hole 300 in the tubular body 301 is formed. It is located between a pair of parallel guide plate bodies 309 (see FIG. 2) extending in the tangential direction of the circle forming the opening, and the annular first casing 302 and the annular second casing 303. A first housing 302 and an annular second housing 303; A length extending from the peripheral surface of the tube body 301 to an end edge in a direction orthogonal to the axial direction of the tube body 301 is formed so as to be connected to the guide plate body 309. When the stopper 4 is attached to the flange 2c, the partition member 3a is attached to the flange 2c so as not to be longer than the radial length of the annular first casing 302 and the annular second casing 303. It has a restricting plate 310 that restricts the movement of the partition 3a so as not to rotate around the axis within the cylindrical body 2a.

The outer seal portion 307 is formed by forming a seal groove 311 on the outer periphery of the annular third casing 304 and mounting an O-ring 312 made of rubber or synthetic resin on the seal groove 311. The leakage of contents from between 3a is prevented, or the entry of foreign matter from the outside is prevented.
On the other hand, the inner seal portion 308 has a seal groove 313 formed on the inner periphery of the through hole 300 for inserting the shaft portion of the annular third casing 304, and an O-ring 314 made of rubber or synthetic resin is provided in the seal groove 313. It is attached and prevents leakage of contents from between the partition 3a and the shaft portion 3b, or prevents foreign matter from entering from the outside.
The O-rings 312 and 314 used for the outer seal portion 307 and the inner seal portion 308 are preferably made of a material that does not cause excessive strength deterioration due to sterilization treatment in consideration of the case where sterilization treatment is performed. Silicone rubber is good.

[Piston-shaft section, stirring section, handle section]
The shaft portion 3 b is a solid round bar as shown in FIGS. 1 and 6, and is slightly longer than the depth of the cylindrical body 2 a of the cylinder 2. A blade-shaped (four-blade) stirring portion 3c that protrudes radially is fixed to an end portion of the shaft portion 3b located in the cylinder 2, and a handle portion 3d is attached to a portion located outside the cylinder 2. It has been. Although the handle portion 3d and the shaft portion 3b may be integrated, it is preferable that the handle portion 3d and the shaft portion 3b are separated and the handle portion 3d is detachable from the shaft portion 3b as in the embodiment. .

  That is, two elastic engaging claws 3e and 3e are projected in the back-to-back direction at the end of the shaft portion 3b of the embodiment, while the engaging claws 3e and 3e are provided on the handle portion 3d. The stepped portion 3f that engages with the stepped portion 3f is formed so that the interval between the engaging claws 3e, 3e can be narrowed and engaged with the stepped portion 3f, and the interval between the engaging claws 3e, 3e. It is possible to release the engagement with the receiving step portion 3f by narrowing. Of course, if the strength is insufficient with such a coupling structure, for example, a locking member (not shown) is engaged between the engaging claws 3e, 3e so that the engaging claws 3e, 3e are constricted. You may not be stuck.

[Stopper]
The stopper 4 is made of a synthetic resin such as polycarbonate and a polyolefin resin such as polyethylene and polypropylene. The stopper 4 has a function of fixing the partition 3a at the other end opening of the cylindrical body 2a so that it cannot rotate and cannot move forward and backward.

  As shown in FIGS. 3 and 4, the stopper 4 connects the first substrate 4a toward the handle portion 3d, the second substrate 4b toward the cylindrical body 2a, and the first substrate 4a and the second substrate 4b. And an edge wall body 4c.

  The first substrate 4a is basically a plate-like body having a shape that follows the outer shape of the flange 2c. The first substrate 4a includes a pair of parallel sides 4d and 4d formed in parallel to each other so as to have a larger interval than the interval between the pair of orthogonal sides 2e and 2e in the flange 2c, and the pair of parallel sides 4d and 4d. A curved edge 4f that continues from the non-slip convex part 4e formed at one end of 4d to the non-slip convex part 4e formed at the end of the other parallel side 4d with the same curved shape as the curved side 2d of the flange 2c. And a notch insertion portion 4g formed on the side facing the curved edge 4f, and is formed in a plate shape. The anti-slip convex part 4e exhibits an anti-slip action when the stopper 4 is pinched with a finger and removed.

  As shown in FIGS. 2 and 3, the notch insertion portion 4g is formed so as to be parallel to the pair of parallel sides 4d and 4d of the first substrate 4a and sandwich the pair of guide plate bodies 309. A pair of parallel straight sides 4h thus formed, a curved inner periphery 4i that follows the outer peripheral surface of the tubular body 301 in continuation with the pair of parallel straight sides 4h, and the restriction plate 310 is fitted to the curved inner periphery 4i. And a restriction groove 4j formed so as to be able to be inserted.

  The second substrate 4b includes a pair of parallel sides 4d and 4d formed in parallel to each other so as to have a slightly larger interval than the interval between the orthogonal side 2e and the orthogonal side 2e in the flange 2c, and the pair of parallel sides 4d and 4d are formed on the side facing the curved edge 4f from the end of one parallel side 4d to the end of the other parallel side 4d with the same curved shape as the curved side 2d of the flange 2c. And a plate-like portion provided with a cylindrical body insertion portion 4k into which the cylinder of the cylindrical body 2a can be inserted. At the edge of the cylindrical body insertion portion 4k, a cylindrical body fixing portion 4m formed in a curved plate shape so as to go around the body portion of the cylindrical body 2a about half a circumference rises at a right angle from the plate-shaped portion, Formed.

  The edge wall body 4c includes a linear edge wall portion 4n that connects the parallel side 4d of the first substrate 4a and the parallel side 4d of the second substrate 4b, the curved edge 4f of the first substrate 4a, and the first side. And a curved edge wall portion 4p that joins the curved edge 4f of the two substrates 4b. The height of the edge wall 4c, that is, the distance between the first substrate 4a and the second substrate 4b is designed to be slightly thicker than the flange 2c. The first substrate 4a, the edge wall body 4c, and the second substrate 4b form a flange mounting portion 4q that is mounted on the flange 2c. Further, the plate-like portion sandwiched between the parallel side 4d of the first substrate 4a and the parallel straight side 4h of the notch insertion portion 4g is attached to the flange 2c, and the partition 3a is attached to the cylindrical body 2a. It is a partition locking part 4r that restricts forward and backward advancement.

[Connecting member]
The connecting member 5 is made of a synthetic resin, and as shown in FIGS. A shape having a mouth portion 5a and a substantially C-shaped cross section (* Needless to say, this description is for the purpose of specifying the shape of the shaft portion 3b and does not limit the method of manufacturing the shaft portion 3b. For example, the starting material for the shaft portion 3b is not limited to the pipe material, and the shaft portion 3b includes those manufactured by extrusion molding or mold forming. It can be attached to and detached from the shaft portion 3b by forcibly expanding. As shown in FIG. 1, the connecting member 5 acts like a stick between the lower surface of the handle portion 3d and the upper surface of the partition member 3a with the shaft portion 3b pulled out to the maximum extent. It is in the form of a spacer, and the progress of the shaft portion 3b into the through hole 300 for inserting the shaft portion of the partitioning tool 3a is hindered by being held between the handle portion 3d and the partitioning tool 3a while being attached to the shaft portion 3b. As a result, the partition 3 a is also pushed into the cylinder 2 together with the force pushing the shaft portion 3 b into the cylinder 2.

  9 (a) to 9 (c) face the split portion 5a so that the connecting member 5 shown in FIGS. 8 (a) to 8 (c) can be easily attached to and detached from the shaft portion 3b. The wall thickness on the side is reduced to facilitate bending. By doing so, the opening / closing of the split portion 5a of the connecting member 5 is facilitated, and the attachment / detachment to the shaft portion 3b can be easily performed with a light force.

[how to use]
Next, a method for using the medical paste injection kneader 1 of the present invention will be described.
First, a predetermined amount of paste raw material powder is filled into the cylinder 2 in which the nozzle portion 2b is closed with a cap 2g from the opening on the flange 2c side. And the partition 3a of the state with which the shaft part 3b of the piston 3 was mounted | worn in the opening by the side of the flange 2c of the cylinder 2 is fitted.

  Next, the stopper 4 is attached to the flange 2c. That is, the stopper 4 is pushed in such that the curved side 2d of the flange 2c is inserted into the flange mounting portion 4q with the first substrate 4a facing the handle portion 3d. When the stopper 4 is pushed in, the parallel straight sides 4h in the notch insertion portion 4g come into contact with the guide plate body 309 in the partition body. At this time, even if the extending direction of the pair of guide plate bodies 309 is not completely coincident with the extending direction of the parallel straight sides 4h, if the stopper 4 is further pushed, the pair of guide plates is moved by the advancement of the stopper 4. The body 309 is forced to extend along the extending direction of the parallel straight sides 4h, that is, the partition 3a rotates slightly around its axis, and the extending direction of the guide plate 309 and the parallel straight sides The extending direction of 4h matches.

  In the second substrate 4b, when the stopper 4 is pushed toward the flange 2c, the cylindrical body insertion portion 4k is fitted into the body of the cylindrical body 2a. As a result, the stopper 4 is firmly attached.

  When the stopper 4 is further pushed forward, the parallel straight side 4h is guided by the guide plate 309, and the curved side 2d of the flange 2c is directed toward the flange mounting portion 4q of the stopper 4. When the stopper 4 is further pushed forward, the curved side 2d of the flange 2c enters a groove formed between the first substrate 4a and the second substrate 4b in the flange mounting portion 4q. When the curved side 2d of the flange 2c is mounted on the flange mounting portion 4q, the regulation plate 310 is fitted into the regulation groove 4j, and the parallel straight sides 4h on the first substrate 4a A partition locking part 4r positioned between the parallel sides 4d is inserted into the gap between the annular first casing 302 and the annular second casing 303, and the partition locking part 4r is the annular first It is in contact with the plane of the casing 302, the plane of the annular second casing 303, and the plane of the flange 2c.

As a result, the partition 3a cannot be rotated around the axis of the cylinder 2a in the cylinder 2a of the cylinder 2, and the partition 3a can move forward and backward along the axial direction of the cylinder 2a. become unable.
That is, the partition 3a is in a state where its position is fixed at the opening of the cylindrical body 2a.

  The steps up to here may be performed at a medical site, but are preferably performed at a manufacturing factory.

Next, the cap 2g is removed with the nozzle portion 2b facing upward, and the liquid L for curing the paste raw material is then removed using the liquid injection container 7 as shown in FIGS. 15 (a) and 15 (b). inject.
The liquid injection container 7 includes a cylindrical container 7b with a finger hook 7a, a pusher 7c, and a movable stopper 7d. The movable stopper 7d is in close contact with the inner peripheral wall of the cylindrical container 7b to prevent the liquid L from leaking out. On the other hand, at the tip of the cylindrical container 7b, an opening portion 7f having a length slightly longer than one movable stopper having an axial bypass groove 7e on the inner peripheral wall is formed.
In the state of FIG. 15A in which the cylindrical container 7b of the liquid injection container 7 is filled with the liquid L, the liquid L is sealed between the movable stopper 7d and the pusher 7c. Then, when the pushing tool 7c is pushed in like a syringe in this state, the movable stopper 7d moves to the opening part 7f at the tip of the cylindrical container 7b by the pressure as shown in FIG. Then, when the movable stopper 7d enters the opening part 7f, the liquid L flows out from the extraction part 7g of the cylindrical container 7b through the bypass groove 7e.
Therefore, if the pouring part 7g of the liquid injection container 7 is inserted into the nozzle part 2b of the medical paste injection kneader 1 and the pusher 7c is pressed in, the liquid L enclosed in the cylindrical container 7b is discharged from the medical paste injection kneader 1. It can be poured into the cylinder 2.

Next, by holding the handle portion 3d and performing a rotational motion around the axis and a reciprocating motion in the axial direction as shown by arrows I and II in FIG. And liquid L are kneaded.
In addition, since the medical paste injection kneader 1 of the embodiment performs the above kneading operation while holding the cylinder 2 with one hand, there is a possibility that the state of kneading becomes difficult to see. On the other hand, if a handle 4s having an appropriate thickness is provided on the stopper 4 as shown in FIG. 16, and the handle 4s is gripped and kneaded, kneading can be performed while checking the inside of the cylinder 2. The angle of the handle 4 s is preferably an acute angle with respect to the axis of the cylinder 2. By doing so, the cylinder 2 can be tilted to an angle suitable for operating the handle portion 3d without forcibly twisting the wrist.

  Next, after kneading is completed, the shaft portion 3b is pulled back to the partition 3a as shown in FIG. 10, and then the stopper 4 is removed from the flange 2c, and the connecting member 5 is mounted on the shaft portion 3b.

  Next, as shown in FIG. 11, the cap 2g of the nozzle portion 2b is replaced with the tube 6 and the handle portion 3d is pushed into the cylinder 2 side. Then, the connecting member 5 hits the lower surface of the handle portion 3d and the force is transmitted to the partition member 3a, and the partition member 3a and the shaft portion 3b are integrally pushed into the cylinder 2. Therefore, the paste in the cylinder 2 is pushed out by the partitioning tool 3 a and sent to the affected part through the tube 6.

  As described above, medical treatment is performed by combining the medical paste injection kneader 1 in which the paste raw material powder is previously filled in the cylinder 2 and the liquid injection container 7 filled with the liquid L for hardening the powder paste raw material. If the paste injection kneading equipment is used, there is no risk of mismeasurement of the powder and the liquid L, and there is no risk of contamination and foreign matters in the kneading process, and a uniformly kneaded paste can be provided quickly.

The following tests were conducted for the purpose of evaluating the medical paste injection kneader of the present invention.
About 20 g of a mixture of 65% by weight of tetracalcium phosphate and 35% by weight of calcium hydrogen phosphate as a paste raw material powder is charged into a cylinder 2 and dextran sulfate sodium 50 as a polysaccharide so that the powder-liquid ratio shown in Table 1 is obtained. A bone paste obtained by injecting a weight% aqueous solution and kneading the powder and liquid was discharged from the nozzle portion 2b. Then, the obtained bone paste was divided into 5 equal parts, and each was measured for the curing time, consistency and compressive strength of the cured body according to JIS standard (JIS T 6602) of dental cement.
In addition, in order to set it as the reference | standard of evaluation, the same powder agent and liquid as the above were put into the mortar, and it knead | mixed enough with the pestle to create the bone paste, and performed the same measurement.
The results are shown in Table 1.

The bone paste obtained in Example a and Comparative Example a was clay-like, and the bone paste obtained in Example b and Comparative Example b was paste-like.
Examples a and b of the present invention can be uniformly kneaded from clay clay bone paste having high viscosity to bone paste having low viscosity by a very simple operation as compared with comparative examples a and b. It was confirmed that the bone paste characteristics (curing time / consistency / strength) were equivalent to those of Comparative Examples a and b.

While the present invention has been described with reference to the embodiments and examples, the present invention is of course not limited to the above-described embodiments.
For example, the coupling structure of the handle portion 3d and the shaft portion 3b may be the one shown in FIGS. 12 to 14 other than that shown in the embodiment.
First, the shaft portion 3b of FIG. 12 is formed by forming a rectangular rod-shaped neck portion 3g at the top, and forming a head portion 3h having the same diameter as the body portion on the neck portion 3g. On the other hand, the handle portion 3d is formed of a square bar and has a mounting hole 3i through which the neck portion 3g and the head portion 3h of the shaft portion 3b can be inserted from one side end surface to the center portion. Then, the head portion 3h and the neck portion 3g of the shaft portion 3b are passed through the mounting holes 3i of the handle portion 3d to couple the shaft portion 3b and the handle portion 3d.
Further, in the coupling structure of FIG. 13, an arcuate clip portion 3j that holds the trunk portion of the shaft portion 3b is further provided on the abdominal surface of the handle portion 3d in addition to the coupling structure of the handle portion 3d and the shaft portion 3b of FIG. Is. This coupling structure is superior in coupling strength between the shaft portion 3b and the handle portion 3d as compared with FIG. 12 due to the action of the clip portion 3j.
Further, in the coupling structure of FIG. 14, the handle portion 3 d is formed by a round bar to form the mounting hole 3 i from one side end surface to the central portion, and further, for example 180 from the end of the mounting hole 3 i toward the circumferential direction. A circumferential gauge opening 3k is formed up to the position of °, the head portion 3h and the neck portion 3g of the shaft portion 3b are passed through the attachment hole 3i of the handle portion 3d, and the head portion 3h and the neck portion 3g of the shaft portion 3b are at the end of the attachment hole 3i. After reaching, the handle portion 3d is rotated 180 ° as shown by arrow III in FIG. 14 (b) to couple the shaft portion 3b and the handle portion 3d. In this coupling structure, since the head portion 3h and the neck portion 3g of the shaft portion 3b are attached to the circumferential gauge port 3k whose direction is changed in the circumferential direction from the attachment hole 3i of the handle portion 3d, the shaft portion 3b is detached from the attachment hole 3i. There is no fear.

  In the embodiment, the top portion of the connecting member 5 hits the lower surface of the handle portion 3d. However, as shown in FIG. 17A, the hook-shaped engagement portion is provided in the vicinity of the handle portion 3d of the shaft portion 3b. 3m is projected and the top of the connecting member 5 is engaged with the engaging portion 3m, or as shown in FIG. 17 (b), a lateral recess is formed in the vicinity of the handle portion 3d of the shaft portion 3b. The engaging portion 3n may be opened, and the engaging protrusion 5b of the connecting member 5 may be engaged with the engaging portion 3n.

Moreover, although the connection member 5 was made into the substantially C-shaped cross section in embodiment, you may make it the pipe shape externally fitted to the shaft part 3b. In this case, the handle portion 3d may be removed from the shaft portion 3b and the pipe-shaped connecting member 5 may be attached.
In the embodiment, the connecting member 5 is mounted on the shaft portion 3b. However, the connecting member 5 is formed in a simple rod shape and arranged next to the shaft portion 3b, and both ends of the connecting member 5 are connected to the handle portion 3d and the partition 3a. You may make it engage with.

  Further, in the embodiment, the stopper 4 of the partition 3a is attached to the flange 2c of the cylinder 2. However, the stopper 4 is formed into a pin shape so as to be inserted from the body portion of the cylinder 2 into the inside. The tip may be engaged with the side of the partition 3a.

It is a longitudinal cross-sectional view of a medical paste injection kneader. It is the XX sectional view taken on the line of FIG. It is a bottom view of a stopper. It is the YY sectional view taken on the line of FIG. It is a longitudinal cross-sectional view of a partition tool. It is a perspective view of a shaft part, a handle part, and a stirring part. FIG. 2 is a sectional view taken along line ZZ in FIG. 1. (A) is a top view of a connection member, (b) is a front view, (c) is a longitudinal cross-sectional view. (A) is a top view of a connection member, (b) is a front view, (c) is a longitudinal cross-sectional view. It is a longitudinal cross-sectional view of the medical paste injection kneader showing the state immediately before injection. It is a longitudinal cross-sectional view of the medical paste injection kneader which shows the state at the time of completion of injection. (A), (b) is a perspective view which shows the other form of a handle | steering-wheel part. (A), (b) is a perspective view which shows the other form of a handle | steering-wheel part. (A), (b), (c) is a perspective view which shows the other form of a handle | steering-wheel part. (A), (b) is a longitudinal cross-sectional view which shows a liquid injection | pouring container. It is a longitudinal cross-sectional view of the medical paste injection kneader which shows the other form of a stopper. (A), (b) is sectional drawing which shows the state which engaged the connection member with the engaging part of the shaft part.

DESCRIPTION OF SYMBOLS 1 ... Medical paste injection kneader 2 ... Cylinder 2b ... Nozzle part 3a ... Partition 3b ... Shaft part 3c ... Agitation part 3d ... Handle part 3m, 3n ... Engagement part 300 ... Through-hole for shaft part insertion 4 ... Stopper 5 ... Connecting member 5a ... Split port L ... Liquid

Claims (12)

A cylinder having an opening at one end and a nozzle at the other end;
A partition slidable in the axial direction inside the cylinder;
A stopper capable of mooring and releasing the partition on the opening side of the cylinder;
A shaft portion that is inserted into a through hole for inserting a shaft portion that passes through the center of the partitioning tool and is capable of reciprocating in and out of the shaft portion through the through hole for inserting the shaft portion and rotating around the axis. When,
A stirring portion provided at a portion of the shaft portion located in the cylinder;
Similarly, a handle portion provided in a portion of the shaft portion located outside the cylinder,
By inhibiting the progression of the shaft portion of the shaft BuSo needful through hole of the partition member, to the shaft portion so as to be the partition member are moved brought into the cylinder together with a force pushing the shaft into the cylinder A connecting member that can be mounted ;
The connecting member, said partition member, medical paste injection kneader, wherein the engaging portion or the handle portion is formed on the shaft portion of the handle portion near the spacer forms der Rukoto to be interposed between the . The connecting member has a substantially C-shaped cross section in which an axial dividing portion is provided at one location on the outer periphery of the pipe material, and the connecting member expands the dividing portion and is attached to and detached from the shaft portion. The medical paste injection kneader according to claim 1 , wherein 3. The medical paste injection kneader according to claim 2 , wherein the connecting member is formed with a reduced thickness on the side facing the dividing portion. The medical paste injection kneader according to any one of claims 1 to 3 , wherein the stirring portion has a blade shape protruding radially from the shaft portion. The medical paste injection kneader according to any one of claims 1 to 4 , wherein the paste is a bone paste. The medical paste injection kneader according to claim 5 , wherein the bone paste is mainly composed of calcium phosphate. The medical paste injection kneader according to claim 6 , wherein the calcium phosphate contains tetracalcium phosphate and calcium hydrogen phosphate as main components. The medical paste injection kneader according to any one of claims 1 to 7 , wherein one component of the paste raw material is a powder, and the powder and liquid are kneaded into a paste. The medical paste injection kneader according to claim 8 , wherein the cylinder is filled with a paste raw material powder in advance. 10. The medical paste injection according to claim 8 or 9 , wherein a liquid for curing the powder paste raw material is injected from a nozzle portion of the cylinder into the powder paste raw material in the cylinder. Kneader. Medical paste injection kneader according to any one of claims 8 to 1 0, wherein the liquid for curing the powder of the paste material is a polysaccharide solution. A medical paste injection kneader comprising: the medical paste injection kneader according to any one of claims 9 to 11; and a liquid injection container filled with a liquid that hardens a paste material of powder. Kneading equipment.

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