Cement monomer quartering homokinetic divider

Abstract

This utility model discloses a bone cement monomer four-equal division device, comprising: a connecting body with a base support, a connecting hole and four collection holes in the connecting body, a piston in each collection hole, a discharge hole on the piston, a discharge pipe extending downward from the discharge hole, a one-way Luer connector on the discharge pipe, pistons mounted on piston rods, four piston rods fixed to the same handle, the discharge pipe extending downward from the handle, a partition plate between the connecting hole and the four collection holes, the top wall of the partition plate being inverted conical, a central distributing hole communicating with the four collection holes at the center of the partition plate, a filter cloth laid flat in the connecting hole, and a break-off component for installing ampoules sealed in the connecting hole, the break-off component pressing against the filter cloth. This utility model can drive the four pistons to descend simultaneously, thereby directly dividing the bone cement monomer into four equal parts, improving the division accuracy.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a bone cement monomer four-equal moving equalizer. Background Technology

[0002] Bone cement is a medical material used in orthopedic surgery. It consists of bone cement monomers and bone cement powder, which are mixed in a certain proportion and then injected into the patient's affected area in a liquid state to solidify. Because the mixing reaction time between the bone cement monomers and bone cement powder is relatively long, the storage time of the resulting bone cement is also relatively short. If the bone cement monomers and bone cement powder in the ampoule are mixed into bone cement in one go, the reaction time is long, so it needs to be prepared before surgery and then injected into the patient in one go by the doctor. However, in actual operation, each patient's condition is different, and different patients need to be treated at different times during the operation. Additional treatments during the operation will interrupt the injection process, which can easily cause the bone cement to solidify and result in waste. To prevent waste, some dispensers on the market can equally distribute bone cement monomers. When using these dispensers, the monomers are drawn into their corresponding collection tubes by pulling the pistons one by one, thus achieving equal distribution. For example, the negative pressure dispenser with authorization number CN118615159B, which can precisely dispense bone cement monomers, has some volume variation between the four collection tubes due to processing and assembly errors during production. Although the error between any two collection tubes is small, it accumulates over time. The resulting error will be relatively large. For example, if the volume error between the four collection tubes is 0.1 ml, when dividing 10 ml of bone cement monomer in an ampoule into equal portions, the first three collection tubes will each draw an extra 0.1 ml of bone cement monomer. In this case, 2.2 ml of bone cement monomer will remain in the 10 ml collection tube, and the fourth collection tube will only draw 2.2 ml of bone cement monomer. This significantly reduces the amount of bone cement monomer in the fourth collection tube, resulting in a large error between the amount of bone cement monomer in the fourth collection tube and the amount to be obtained by equal division. Utility Model Content

[0003] The purpose of this invention is to provide a bone cement monomer four-equal division device that enables the pistons in the four collection holes to descend simultaneously, thereby improving the equalization accuracy.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a bone cement monomer four-part simultaneous dispensing device, comprising: a connecting body, in which a connecting hole and four circumferentially distributed collection holes with the same internal volume are provided; a piston is movably and sealed in each collection hole; a liquid outlet hole is provided on the piston; a liquid outlet pipe extends downward from the liquid outlet hole; a one-way Luer connector is provided on the liquid outlet pipe; the piston is sealed and fitted onto the piston rod; the four piston rods are fixed to the same handle; and the liquid outlet pipe passes through the piston rod. Extending downwards from the handle, when the pistons in the four collection holes descend to their positions, the total volume of the inner cavities of the four collection holes matches the volume of the bone cement monomer in the ampoule. A partition plate is provided between the connecting hole and the four collection holes, with the top wall of the partition plate being an inverted cone shape. A central dispensing hole connected to the four collection holes is provided at the center of the partition plate. A filter cloth is laid flat in the connecting hole, and a break-off component containing the ampoule is sealed in the connecting hole. The break-off component presses against the filter cloth, and a base is provided on the connecting body.

[0005] Furthermore, in the aforementioned bone cement monomer four-equal moving distributor, a guide platform is provided between the four liquid collection holes. The central axis of the guide platform is coaxial with the central axis of the central liquid distribution hole. Four guide surfaces are provided on the guide platform, and the four guide surfaces are connected to the four liquid collection holes one by one. A circulation groove is left between the guide platform and the central liquid distribution hole.

[0006] Furthermore, in the aforementioned bone cement monomer four-equal moving distributor, four side dispensing holes of the same diameter and flush are evenly distributed on the upper circumference of the partition plate, and the four side dispensing holes are respectively connected to four liquid collection holes.

[0007] Furthermore, in the aforementioned bone cement monomer four-part simultaneous dispensing device, four matching sleeves are evenly distributed around the circumference of the handle. The four matching sleeves are movably installed in four liquid collection holes. Four piston rods are inserted into the four matching sleeves and adhered to them. Four liquid outlet tubes pass through the matching sleeves and extend downwards out of the handle. A limiting boss is provided between the handle and the matching sleeves. When the piston abuts against the inner top wall of the liquid collection hole, the lower end of the connector abuts against the limiting boss. The handle is provided with anti-slip texture and an outward-curving skirt.

[0008] Furthermore, in the aforementioned bone cement monomer four-equal moving distributor, several guide ribs are evenly distributed on the outer wall of the matching sleeve, and the guide ribs abut against the inner wall of the corresponding collection hole.

[0009] Furthermore, in the aforementioned bone cement monomer four-equal moving distributor, the outer diameter of the base is larger than the outer diameter of the connecting body. A snap-fit ​​connector and a guide post are provided on the base. Several reinforcing ribs are evenly distributed around the circumference between the guide post and the base. The tops of all the reinforcing ribs are flush. An installation hole is provided in the center of the connecting body. The snap-fit ​​connector on the base is snapped into the installation hole of the connecting body and is bonded to each other. A guide hole is provided in the center of the handle. The guide hole on the handle slides in cooperation with the guide post on the base. When the piston descends to the position, the guide hole on the handle abuts against the top of the reinforcing rib.

[0010] The advantages of this invention are as follows: the pistons in the four collection holes are connected to the same handle via piston rods. By pulling the handle, the four pistons can be driven to descend synchronously and at the same speed in their respective collection holes. The negative pressure generated by the four pistons in their respective collection holes is the same. Under the same negative pressure, the volume of bone cement monomers sucked into the collection holes is also the same. This allows the bone cement monomers in the connecting holes to be directly divided into four equal parts without the need to sequentially remove the pistons from the four collection holes to distribute the bone cement monomers. This reduces the division error caused by processing or assembly errors and greatly improves the division accuracy. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the bone cement monomer four-equal moving equalizer described in this utility model.

[0012] Figure 2 yes Figure 1 A cross-sectional structural diagram.

[0013] Figure 3 yes Figure 1 A schematic diagram of the connecting body.

[0014] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure.

[0015] Figure 5 yes Figure 1 A cross-sectional view of the handle. Detailed Implementation

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0017] like Figures 1-5As shown, the bone cement monomer four-equal-dividing device of this utility model includes: a connecting body 1, in which a connecting hole 11 and four circumferentially distributed liquid collection holes 12 with the same internal volume are provided; a partition plate 13 is provided between the connecting hole 11 and the four liquid collection holes 12, the top wall of the partition plate 13 being inverted conical in shape; a central liquid distribution hole 131 communicating with the four liquid collection holes 12 is provided at the center of the partition plate 13; a guide platform 14 is provided between the four liquid collection holes 12, the central axis of the guide platform 14 being coaxial with the central axis of the central liquid distribution hole 131; four guide surfaces are provided on the guide platform 14, each of the four guide surfaces communicating with one of the four liquid collection holes 12; and a circulation space is left between the guide platform 14 and the central liquid distribution hole 131. The groove has four flush side dispensing holes 132 of the same diameter evenly distributed around the circumference of the partition plate 13. The four side dispensing holes 132 are respectively connected to four collection holes 12. Filter cloth 2 is laid flat in the connection hole 11. A break assembly 4, in which an ampoule 3 is installed, is sealed in the connection hole 11. The break assembly 4 presses against the filter cloth 2. The break assembly 4 in this embodiment is similar in structure to the break filter assembly in the negative pressure distributor with high-precision dispensing of bone cement monomers, which has the authorization announcement number CN118615159B. The break assembly 4 includes: a lower sleeve 41, a rotating sleeve 42, and an upper sleeve 43. The lower sleeve 41 is sealed and inserted into the connection hole 11 and presses against the filter cloth 2 to seal it. The bottom of the rotating sleeve 42 is connected to the lower sleeve 43. The top of tube 41 is connected, and a positioning hole is provided at the top of the rotating sleeve 42. The bottom of the upper sleeve 43 is connected to the top of the rotating sleeve 42, and the upper sleeve 43 is connected to the positioning hole of the rotating sleeve 42. A screw cap 421 is rotatably provided at both ends of the rotating sleeve 42. The screw cap 421 is sealed to the rotating sleeve 42 by a sealing ring. A knob 422 is provided between the two screw caps 421. A straight through hole 423 aligned vertically with the positioning hole is opened in the knob 422. A sealing cap 431 is threaded to the top of the upper sleeve 43. When installing the ampoule 3, the sealing cap 431 is unscrewed, and the screw cap 421 is rotated to align the straight through hole 423 on the knob 422 with the positioning hole. Then, the ampoule 3 is inserted into the upper sleeve 43 with the bottle head facing down. After the ampoule head passes through the positioning hole of the rotating sleeve 42, it extends into the straight hole 423. Then, the sealing cap 431 is screwed back onto the upper sleeve 43. At this time, the bottom of the ampoule 3 rests against the sealing cap 431, and the neck of the ampoule 3 rests against the positioning hole. When it is necessary to break the ampoule 3, simply rotate the cap 421, and the knob 422 will break the neck of the ampoule 3, so that the broken part of the ampoule head is tilted downward. The bone cement monomer in the ampoule body and the ampoule head will flow into the connecting hole 11 through the filter cloth 2. After the partition plate 13 with the top wall inverted cone shape is set in the connecting hole 11, the bone cement monomer in the connecting hole 11 will converge downward into the central dispensing hole 131. During the downward flow of the bone cement monomer...If the liquid level of the bone cement monomer in the connecting hole 11 is higher than that in the side distribution holes 132, the bone cement monomer will flow into the four collection holes 12 through the four side distribution holes 132 and the central distribution hole 131 of the same diameter, improving the equal distribution efficiency of the monomer. When the liquid level of the bone cement monomer in the connecting hole 11 is lower than that in the side distribution holes 132, the bone cement monomer will flow into the four collection holes 12 through the central distribution hole 131. The guide platform 14 can prevent the bone cement monomer from not flowing completely into the four collection holes 12. The circulation groove between the guide platform 14 and the central distribution hole 131 is to allow the bone cement monomer to circulate in the central distribution hole 13. When one collection hole 12 is full of bone cement monomer, the excess bone cement monomer at that collection hole 12 can flow into another collection hole 12 through the circulation groove.

[0018] A piston 5 is movably sealed in each of the four collection holes 12. When the piston 5 in the four collection holes 12 descends to its position, the total volume of the inner cavity of the four collection holes 12 matches the volume of the bone cement monomer in the ampoule 3. A liquid outlet hole is provided on the piston 5, and a liquid outlet pipe 51 extends downward from the liquid outlet hole. A one-way Luer connector 52 is provided on the liquid outlet pipe 51. The piston 5 is sealed and fitted onto the piston rod 53. The four piston rods 53 are fixed on the same handle 6. The handle 6 is circumferentially... Four mating sleeves 61 are evenly distributed, and the four mating sleeves 61 are movably disposed in the four liquid collection holes 12 respectively. Several guide ribs 611 are evenly distributed on the outer wall of the mating sleeves 61, and the guide ribs 611 abut against the inner wall of the corresponding liquid collection hole 12. Four piston rods 53 are inserted into the four mating sleeves 61 respectively and adhered to the four mating sleeves 61. Four liquid outlet pipes 51 pass through the mating sleeves 61 and extend downwards to the handle 6. A limiting device is provided between the handle 6 and the mating sleeves 61. The limiting boss 62 serves as a limiting surface. When the piston 5 abuts against the inner top wall of the collection hole 12, the lower end of the connector 1 abuts against the limiting boss 62, which helps to accurately determine whether the piston 5 is installed in place during assembly and production. A guide hole 63 is provided in the center of the handle 6, and anti-slip texture 64 and outward-curved skirt 65 are provided on the handle 6. When in use, the operator holds the handle 6, and the anti-slip texture 64 increases the friction between the hand and the handle 6. At the same time, the hand can rest against the outward-curved skirt 65, which makes it convenient for the operator to apply a downward force to the handle 6. After applying a downward force to the handle 6, the handle 6 can drive the four piston rods 53 and the pistons 5 on the piston rods 53 to move downward at the same speed. When the four pistons 5 descend together, the bone cement monomer in the connecting hole 11 will flow into the four collection holes 12 at the same speed. In this way, the four collection holes 12 can draw in an equal amount of bone cement monomer, thereby dividing the bone cement monomer in the ampoule 3 equally.

[0019] A base 7 is provided on the connecting body 1. The outer diameter of the base 7 is larger than that of the connecting body 1, so as to better provide support. A snap-fit ​​connector 71 and a guide post 72 are provided on the base 7. Several reinforcing ribs 73 are evenly distributed around the circumference between the guide post 72 and the base 7. The tops of all the reinforcing ribs 73 are flush. An installation hole 15 is provided in the center of the connecting body 1. The snap-fit ​​connector 71 on the base 7 is snapped into the installation hole 15 of the connecting body 1 and is stuck to each other. The guide hole 63 on the handle 6 is slidably engaged with the guide post 72 on the base 7. The guide rib 611 on the handle 6 is engaged with the liquid collection hole 12. The engagement of the guide hole 63 on the handle 6 and the guide post 72 on the base 7 can provide a stable guiding effect for the handle 6 and prevent the handle 6 from twisting or deviating during movement. When the piston 5 descends to the position, the guide hole 63 on the handle 6 abuts against the top of the reinforcing rib 73.

[0020] In use, first use the breaking assembly 4 to break the ampoule 3 installed in the breaking assembly 4. The bone cement monomer in the ampoule 3 will flow into the connecting hole 11 after being filtered by the filter cloth 2. At this time, the liquid level of the bone cement monomer in the connecting hole 11 is higher than the side dispensing holes 132 on the partition plate 13. Then, pull the handle 6 down. The handle 6 drives the four piston rods 53 to move downward at the same speed. The pistons 5 on the four piston rods 53 also move downward at the same speed. At this time, the bone cement monomer in the connecting hole 11 will flow into the four collecting holes 12 at a uniform speed and in equal amount from the four side dispensing holes 132 and the central dispensing hole 131. When the liquid level of the bone cement monomer in the connecting hole 11 is lower than the four side dispensing holes 132, the bone cement monomer will be equally distributed from the central dispensing hole 131 into the four collecting holes 12. When the guide hole 63 abuts against the reinforcing rib 73 on the guide post 72, it indicates that the piston 5 has descended to the correct position. The four collection holes 12 have evenly distributed the bone cement monomers in the ampoule 3. When it is necessary to use a stirring syringe to extract the bone cement monomers, simply insert the stirring syringe into the one-way Luer connector 52 for direct extraction. Since the four pistons 5 descend synchronously and at the same speed under the drive of the handle 6, the negative pressure generated by the four pistons 5 when descending in their respective collection holes 12 is the same. Under the same negative pressure, the volume of bone cement monomers sucked into the collection holes 12 is also the same. This allows the bone cement monomers in the connecting hole 11 to be directly divided into four equal parts without the need to sequentially extract the pistons 5 from the four collection holes 12 to distribute the bone cement monomers, thereby reducing the division error caused by processing or assembly errors.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A bone cement monomer quadrant with simultaneous movement, comprising: The connector is characterized by: a connecting hole and four circumferentially distributed collection holes with the same internal volume; a piston is movably sealed in each collection hole; a liquid outlet hole is provided on the piston; a liquid outlet pipe extends downward from the liquid outlet hole; a one-way Luer connector is provided on the liquid outlet pipe; the piston is sealed and fitted onto the piston rod; the four piston rods are fixed to the same handle; the liquid outlet pipe passes through the piston rod and extends downward from the handle; when the pistons in the four collection holes descend to their positions, the total internal volume of the four collection holes matches the volume of the bone cement monomer in the ampoule; a partition plate is provided between the connecting hole and the four collection holes; the top wall of the partition plate is inverted conical; a central distributing hole communicating with the four collection holes is provided at the center of the partition plate; a filter cloth is laid flat in the connecting hole; a break-off component for installing the ampoule is sealed in the connecting hole; the break-off component presses against the filter cloth; and a base is provided on the connector.

2. The bone cement monomer quadrant simultaneous dividing device according to claim 1, characterized in that: A flow guide platform is set between the four liquid collection holes. The central axis of the flow guide platform is coaxial with the central axis of the central liquid distribution hole. Four flow guide surfaces are set on the flow guide platform, and the four flow guide surfaces are connected to the four liquid collection holes one by one. A circulation groove is left between the flow guide platform and the central liquid distribution hole.

3. The bone cement monomer quadrant simultaneous dispensing device according to claim 1, characterized in that: Four side liquid distribution holes of the same diameter and flush are evenly distributed on the upper circumference of the partition plate. The four side liquid distribution holes are connected to the four liquid collection holes respectively.

4. The bone cement monomer quadrant simultaneous dividing device according to claim 1, characterized in that: Four mating sleeves are evenly distributed around the circumference of the handle. The four mating sleeves are movably installed in the four liquid collection holes. The four piston rods are inserted into the four mating sleeves and are attached to the four mating sleeves. The four liquid outlet pipes pass through the mating sleeves and extend downwards out of the handle. A limiting boss is provided between the handle and the mating sleeves. When the piston abuts against the inner top wall of the liquid collection hole, the lower end of the connector abuts against the limiting boss. The handle is provided with anti-slip texture and outward-curving skirt.

5. The bone cement monomer quadrant simultaneous dividing device according to claim 4, characterized in that: Several guide ribs are evenly distributed on the outer wall of the sleeve, and the guide ribs abut against the inner wall of the corresponding liquid collection hole.

6. The bone cement monomer quadrant simultaneous dispensing device according to claim 4 or 5, characterized in that: The outer diameter of the base is larger than the outer diameter of the connecting body. The base is equipped with a snap-fit ​​connector and a guide post. Several reinforcing ribs are evenly distributed around the circumference between the guide post and the base. The tops of all the reinforcing ribs are flush. A mounting hole is provided in the center of the connecting body. The snap-fit ​​connector on the base is snapped into the mounting hole of the connecting body and is stuck together. A guide hole is provided in the center of the handle. The guide hole on the handle slides with the guide post on the base. When the piston descends to the position, the guide hole on the handle abuts against the top of the reinforcing rib.

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