JPS5988157A - Multi-barrel syringe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a skin shring for use in the medical field, and more particularly to a multi-barrel shring for sequentially injecting different medicinal solutions in selected procedures.

U.S. Patent No. 4.10 filed August 29, 1978
No. 9,653 (Title of the Invention, Multi-Body Shring), we disclosed a continuous injection multi-shring consisting of a body with a pair of holes, each shring storing a different medicinal solution and having a name tag. has a slidable plunger.

The shring has a single needle for dispensing the drug solution, and the name tag communicates with the needle through a one-sided valve, a valve similar to a rubber duckbill valve. Pressing down on either plunger creates fluid pressure in the corresponding hole and opens one side/help to pass the drug through that hole and into the needle. Mixing of the drug fluids of one cavity and the other within the syringe is prevented or made impossible by the presence of the one-way valve and the conduit leading from the one-way valve to the needle.

The shring shown in Patent No. 4.10111,853 is specifically designed for use in fundamental dental treatment, with an initial injection of hydrogen peroxide under pressure to remove the wound particles; Immediately inject a chlorinated soda solution such as sodium hypochlorite. For this sequential injection, two shrings are usually required. Therefore, the use of a single shring with two barrels containing different drug solutions reduces the time between successive injections and the number of shrings. In addition, as a result, it is possible to save time and effort in filling the chemical solution and sterilizing it.

In the multi-barrel syringe described above, two one-way valves were required to prevent flow of liquid from one barrel to the other, which would result in premature liquid mixing during operation. The valve increased the cost of manufacturing the shring and required individual cleaning and maintenance to prevent clogging and poor performance. The invention herein invented completely avoids the use of valves as taught by our earlier invention and provides direct flow of liquid from the shrink cavity to the button via a conduit. Each of the conduits is selectively occluded with the desired drug solution.

Accordingly, one embodiment of the present invention provides a multi-barrel, optionally dispensing shring having a body portion that includes a pair of cavities for housing plungers.

Each cavity has a recess and a conduit for free flow of liquid outwardly from the cavity. Pivoted to the body at the lowermost end is a pivoted movable member which, by selected pivoting action of the movable member, is a single piece placed in line with a particular conduit to receive the camphor. It has one needle hole. Other conduits are plugged to avoid 2-ide bagging of fluid.

Another embodiment of the invention is similar to the first embodiment in that a swivel-like rotating member is formed on the body to select for alignment of the conduit and needle bore. Again, the needle is aligned to communicate the cavity with the conduit, and the other conduit is occluded.

Therefore, a primary objective of the present invention is to eliminate the need for any control valves for the release of two or more desired drug solutions through a single hypodermic needle and to allow the filling of multiple shrings through the button. The object of the present invention is to provide a multi-cylinder shring that allows for selective and/or continuous liquid delivery.

Another object of the present invention is to provide a selective liquid delivery multi-barrel shring that has fewer parts, is less expensive, and is easier to clean and sterilize.

Yet another object of the present invention is to provide a multi-barrel shring that provides selective liquid delivery that effectively prevents the limited quantities of medical liquids from interacting with each other during the release of selected medical liquids.

Other objects and advantages of the invention will become apparent from the following description with reference to the accompanying drawings.

Reference will now be made in detail to the drawings, and in particular to FIGS. 1.2 and 3, which show a continuously pumping, multi-cylinder shring IO constructed in accordance with the present invention.

Such a shrink has a pair of cavities 14 arranged side by side in a separated state.
．． 16, each cavity 14, 16 containing a plunger 18, 20.

Figures 4.5 and 6 show in more detail the shrink body 12, which terminates at its lowermost end in a fixed, rigid hemispherical end 22. The end portion 22 has a pair of angular holes or conduits 24 converging from the top end to the bottom end.
．． 26 is formed. At their upper ends the conduits 24.2
6 each have an inlet 28.30 and an outlet 32.34 at the opposite end. Conduit 24 communicates with cavity 14 through port 28 for receiving fluid from cavity 14 .

Conduit 26, in turn, communicates with cavity 16 through port 30.

The fixed end 22 further includes a cylindrical recess or space 36 for housing a compression coil 38, which is connected to a surface 40 of the recess and a pivot pin 4 transverse to the recess, which will be described next.
Hold 2.

End portion 22. ) is the needle support member 44, which is hollow and shell-shaped and has an interior space shaped to fit the exterior surface of the end portion 22. Part 4
4, the inner surface of the member 44 is connected to the end portion 2 by the pivot pin 42.
2 and such that member 44 can pivot clockwise or counterclockwise on the body of the syringe as indicated by arrows 45.47 in FIG. It is set up.

The actuation of the pivoting needle support member 44 is effected by the pair of ronds 46.
48. Each rod 46.48
project outwardly from the periphery of member 44 and are connected at opposite ends 50.52 of the member along a pair of outwardly projecting flanges 51.53. Other rod end 54.
56 are each connected to an actuating lever 58,60. The levers 58, 60 are mounted on the body 12 by pivots 59, 61. Furthermore, the member 44 is always in contact with the fixed end 22 via the contact surface with a predetermined pressure. This is due to the action of a coil spring 38 acting outwardly on the pivot 42 supporting the member 44 and on the fixed end 22, thus preventing leakage from both contact surfaces. be done.

The needle support member 44 has a needle hole 62 in the top or dome portion of the hollow shell for receiving the shringe needle 64 and retains the needle 64 in a conventional manner for filling and discharging medical fluid. Selective movement of the needle support member 44 causes the hole 62 and the needle 6 to
4 and the outlet (orifice) 32.34 of the conduit 24.26 are alternately aligned and communicated: thus communicating with the cavity 14.16. When the respective cavities 14, conduits 24, and needle holes 62 are in line and in communication for releasing the medicinal solution, the conduits 26 are placed in a non-operating state and the inhalation or movement of the medicinal solution is blocked by the contact surface of the shell-like member. Ru. Similarly, when cavity 16, conduit 26, and needle hole 62 are in line and in communication, conduit 24 is occluded.

The shrink body 12 is integrally formed and has handles 66, 68 projecting outwardly from its upper end to facilitate securely holding the shrink during use. An actuating lever 58.60 is provided directly below the handle 66.68 and, as previously described, selective movement of the needle support member 44 is provided by lever 58.60.
This is done with the knobs 8 and 60. The lever is normally held in a horizontal position as shown in FIG. This places the needle support member 44 in a neutral, ie, non-actuated, state, with the needle hole 62 in an intermediate position and the exit r of conduits 24 and 26.
: Communication between J3.2 and 34 is removed.

In this neutral position, no liquid will be expelled from either cavity 14 or 16 even if downwardly acting pressure is applied to either plunger 18 or 20.

When the syringe 10 is used to release a drug solution, the operator squeezes the syringe normally by resting the thumb on either plunger and squeezing the syringe 66.6 with the other finger.
Place it under 8. The user first places the fluid to be released into the cavity 14.
or 16, and then move the finger under the lever 58, 60 located close to the selected cavity. For example, when it is therapeutically necessary to initially release fluid from the cavity 14, the user can move the lever 58 adjacent to the cavity 14.
You will move your finger under the . Movement of the thumb and fingers exerts downward pressure on plunger 18 and simultaneously pivots lever 58 upward. As a result, Rondo 46
The needle support member 44 is rotated clockwise until the needle hole 62 and button 64 are aligned with the outlet 32 of the conduit 24. At the same time, the plunger 18 is depressed, causing fluid to flow from the cavity through the conduit and into the properly aligned needle 64.

If a different liquid is subsequently to be expelled from the cavity 16, the user need only modify the grip so that the subject's finger is under the other actuating lever and the thumb presses on the plunger 20.

A finger force is then applied to pivot the lever 60 upwardly, raising the rod 48 to move the needle support member 44 counterclockwise until the needle hole 62 and button 64 are exactly aligned with the outlet 34. Turn to. As a result, liquid is transferred from the cavity 16 to the needle 64.
supplied to

The levers 58 and 60 are constructed to have the length and position necessary to rotate the needle support member with elevation over its entire length so that the needle hole aligns precisely with the outlet 32 or 34. Pivot bin 42 as shown in FIG.
The pressure of compression spring 38 acting upwardly on pin 42 forms an effective seal between the contact surfaces of needle support member 44 and end 22 and holds needle support member 44 in either inclined position. That's what I do.

Whenever the needle hole 62 and needle 64 are properly aligned with a liquid-guiding conduit, the outlet of the other conduit is shielded by the underlying needle support member 44.

This results in fluid from one cavity entering the other cavity or
Mixing of fluid in one cavity with fluid in another cavity is prevented and these effects can be achieved without the use of valves.

Referring now to Figures 7.8 and 9, the other side of the multi-barrel shring of the present invention is shown. That shrink 7
0 form spaced apart fluid containing cavities 72,74. Cavities 72,74 house plungers 76 and 78. The cavities 72 and 74 terminate at ends with downwardly tapered fluid conduits or holes 80 and 82 for receiving fluid from the cavities. Cavities 72 and 74 can be filled and discharged through the bottom surface of body 70.

Rotatably mounted on the bottom of the shrink filter 0 is a needle support member 84 having an upper body portion 84 a and an upper surface portion 94 that is sized and shaped to match the bottom surface of the shrink filter body 70 . The needle attachment part 96 is eccentric with respect to the upper body part 84a, and the upper body part is tapered downward. The needle support member 84 is located within its central quadrant 88 and has a spring loaded screw 86.
is rotatably provided in the body 70J-. Further, the screw 86 serves as a rotation axis of the needle support member on the shrink body 70. The screw 86 is threaded into the center of the shrink body 70 and faces into the central cylindrical recess 88 of the needle support member 84. The L end of the recess 88 is defined by an annular protrusion 89 that is bent over, the upper end of the coil compression spring that wraps around the leg of the screw is pressed against the bottom surface of the protrusion 89, and the other end is formed by an enlarged diameter of the screw 86. It is pressed against the screw head. Compression spring 90 exerts a downwardly biased pressure on screw head 86a, thereby forcing shrinkage body 70 into tight abutment against needle support member 84. The screw leg is secured to the body through the central hole of the annular projection 89 and the enlarged screw head slides into the quadrant 88 so that the needle support member 84
is guided to rotate around the screw 86.

As shown in FIG. 9, the needle support member 84 further includes a hole 92 tapered in an off-center direction. Hole 92
extends downward from the contact surface 94 with the upper body toward the needle mounting section 96, and communicates with a hollow needle 98 in which a normal flow path is formed for the circulation of the drug solution within the needle mounting section 96. .

Off-center needle bore 92 is positioned to selectively communicate with either outlet 80 or 82 when needle support member 84 is rotated to either of two operative positions.

In the initial operating position shown in FIG. 9, the needle bore 92 is in communication with the outlet 80 which communicates with the liquid receiving cavity 72 of the shrink.

The needle support member 84 can be rotated 180° about the pin 86 to the operative position of FIG. When needle support member 84 is in the initial actuated position of FIG. 9 and plunger 76 is depressed, liquid is expelled from cavity 72 through hole 92 and into needle 98. When the needle support member 84 is manually rotated to the second operative position of FIG. 7 and the plunger is depressed, liquid is expelled from the cavity 74 through the needle bore 92 and into the needle 98. During use, liquid leakage from between the rotatable member 84 and the shrink body 70 can be avoided through the needle hole 9 to form a seal.
A flexible O-ring 100 press-fitted around 20 and diametrically opposed diametrically opposed holes positioned on the top surface of the needle support member 84 to underlie and seal the non-actuated outlet 80 or 82. This is prevented by the flat flexible disc 102.

Needle hole 92 in any operating position of needle support member 84
It is desirable and necessary to ensure that the outlet 80 and outlet 80 in the first actuated position are accurately matched, and then with the outlet 82 in the second actuated position. To achieve a precision fit, a slot with a T-shaped cross section is formed in the shrink body 70. Slot 104 extends precisely from one side to the other at the lower end of shrink body 70. FIG. 9 shows two ends of the T-shaped slot 104, one end aligned with and proximate outlet 80 and the other end aligned with and proximate outlet 82. FIG. Formed on the needle support member 84 is a T-shaped rivet (106) that slidably fits within the slot 104, and is connected from one end of the slot to the other as the needle support member rotates between the two operative positions. Rub along the edges. rivet) 106 when the needle support member 84 is rotated to its initial operating position
The rivet 106 contacts one end of the T-shaped slot, which acts as a stop for positioning the needle hole 92 exactly in line with slot) 104 so as to be in contact with the other end. Slot 104 acts as a stop that positions needle bore 92 precisely in line with outlet 82. While the best embodiment of the invention has been shown and described, it will be obvious that certain omissions, changes, and additions may be made without departing from the spirit of the invention and the scope of the claims.

[Brief explanation of the drawing]

FIG. 1 is a front view of a multi-barrel shringe according to the present invention capable of selectively projecting waves, FIG. 2 is a side view of FIG. 1, FIG. 3 is a plan view of FIG. 1, and FIG. Figure 2 is a sectional view taken along line 4-4, Figure 5 is a partially enlarged view taken along line 5-5 in Figure 4, Figure 6 is an enlarged cross-section taken along line 6-6 in Figure 4. Figure 7 is a front view of a multi-body shringe according to the present invention that can selectively project waves; Figure 8 is a side view of Figure 7; Figure 9 is a sectional view taken along line 9-9 in Figure 8; FIG. 10 is a diagram showing details of the T-shaped slot and rivet support in FIG. 9. Here, 10... Schring, 14.16... Cavity. 18.20... Plunger, 22.24... Conduit,
38... Coil spring, 42... Pivot pin, 44... Button support member, 46.48... Rod, 7
2゜74...lumen, 80.82...outlet, 84...
Needle support member, 86... screw, 90... coil spring, 92... hole, 94... contact surface. FIG, 2 FIG, 4

Claims (1)

[Scope of Claims] 1. A first liquid conduit having a pair of independent liquid storage cavities, a pair of plungers that can independently push down the inside of the storage cavities, and communicating the opening with each cavity at a spaced apart position. and a second oil conduit, a needle support member mounted on the lower surface of the body, which includes an upper body, a lower body that supports the drilling needle, and the upper body. the needle support member having a single nail hole therethrough communicating with the slotted needle, the needle hole mating with the first fluid conduit, and the upper body of the needle support member connecting the second fluid conduit; a first operating position in which the needle bore is aligned with and communicates with a second liquid conduit, and a second position in which the first liquid conduit is occluded by an upper portion of the needle support member;
A multi-barrel shringe for selectively dispensing liquid, comprising support means movably supporting said needle support member on body balls of said shring for movement of said needle support member between an operative position and an actuated position of said needle support member. 2. The needle hole communicates with the fluid conduit of the first cavity of the paired cavities in the first operating position of the needle support member, and the fluid conduit communicates with the fluid conduit from the first cavity by depression of the plunger of the first cavity. Fluid is discharged into a slotted needle through a needle bore, and in a second operative position of the needle support member, the needle bore communicates with the fluid conduit of a second lumen of the paired lumens, and the plunger of the second lumen is A shring is attached to the upper body of the needle support member in order to release liquid into the perforated needle through the liquid conduit communicating with the second cavity and the needle hole when pressed, and to prevent liquid from leaking between the two liquid conduits. 2. The multi-barrel shringe according to claim 1, further comprising means for bringing the portion into reliable contact with the shrink. 3. The shrink body portion has an arcuate bottom surface, and the needle support member tightly engages with the arcuate bottom surface. Claim 2, wherein the support means comprises a pivot pin for pivoting the hollow upper body portion of the needle support member onto the shrink body portion, the support means comprising a hollow L-section body portion having a slidable recess. Multi-body syringe as described in section. 4. A pivot pin extends transversely between the shrink body and the needle support member, and a compression spring is provided within the shrink body portion so that the arcuate bottom surface of the shrink body and the recess of the needle support member firmly abut each other. 4. The multi-barrel shringe according to claim 3, wherein the pivot pin is supported in a biasing direction to prevent liquid leakage from between the liquid conduits. 5. an actuating member for selectively moving the needle support member between first and second actuating positions, the actuating member being spaced apart and pivotally mounted on opposing side stops at the upper end of the shrink body; 4. The multi-barrel syringe according to claim 3, comprising a pair of levers and a pair of coupling members connecting each lever to the needle support member at the lower end. 6. The shrink body has a flat bottom surface, and the upper body of the needle support member has a flat top surface that is located below the flat bottom surface and forms the same contact surface. 3. The multi-barrel shringe of claim 2, wherein support means supports said needle support on said shrinkage body for rotational movement about a central axis extending vertically in a top plane. 7. The multi-barrel shringe according to claim 7, wherein the needle holes are eccentric from the center of the rotation axis of the needle support member. 8. A journal member that is fixed to the shrink body and hangs down from the bottom surface of the flat part of the body, and a recess that rotatably accommodates the journal member that is placed in the center of the flat top surface of the needle support member and hangs down. A multiple barrel syringe according to claim 7. 9. A journal member is fixed to the shrinkage body and includes a screw having an enlarged head, and the support means is fixed to the shrinkage body and includes a screw on the screw head and the needle support such that the support means firmly abuts the shrinkage body and the needle support member flush with each other. 9. The multi-barrel syringe of claim 8 including a compression spring interposed therebetween. io, a resilient sealing member is provided on the flat upper surface of the needle support member and located below the outlet and liquid conduit in communication with the needle bore when the needle support member is placed in any operative position; and is positioned so as to close the claim 9.
Multi-body syringe as described in section.