CN112168324B

CN112168324B - Bone cement stirrer

Info

Publication number: CN112168324B
Application number: CN201910643322.0A
Authority: CN
Inventors: 江乐阳; 马力; 张志远
Original assignee: Beijing Zksk Technology Co ltd
Current assignee: Beijing Zksk Technology Co ltd
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2022-09-06
Anticipated expiration: 2039-07-04
Also published as: CN112168324A

Abstract

The invention relates to the field of medical appliances, in particular to a bone cement stirrer, which comprises an upper shell and a lower shell, wherein an elastic telescopic cylinder is connected between the upper shell and the lower shell; a lower rotating shaft is arranged in the middle of the inner side of the lower shell, a driving motor connected with the lower rotating shaft is arranged at the bottom of the lower shell, and a plurality of groups of stirring mechanisms are circumferentially distributed on the lower rotating shaft on the inner side of the lower shell; the top of the upper shell is provided with an air exhaust cavity communicated with the inner space of the upper shell, the middle part of the inner side of the upper shell is provided with an upper rotating shaft which can be in linkage fit with the lower rotating shaft, and the upper end of the upper rotating shaft extends into the air exhaust cavity and is connected with air exhaust fan blades arranged in the air exhaust cavity; the middle of the top of the air pumping cavity is connected with an exhaust pipe with a valve, and the other end of the exhaust pipe is connected with a filter. The invention has the advantages of energy saving and environmental protection by arranging the linkage matching structure of stirring and air extraction, and can ensure that the bone cement achieves good biomechanical property, thereby ensuring that the bone cement is more ideally filled.

Description

Bone cement stirrer

Technical Field

The invention relates to the field of medical appliances, in particular to a bone cement stirrer.

Background

Vertebral compression fracture is the most common complication of osteoporosis patients, and the traditional open surgery treatment has large trauma and many complications. Percutaneous Vertebroplasty (PVP) and Percutaneous Kyphoplasty (PKP) are novel minimally invasive surgical operations which are developed rapidly in spinal surgery in recent years, and the mechanical stability of a diseased vertebral body is enhanced by directly injecting fillers such as bone cement and artificial bone into a compressed vertebral body through percutaneous injection or injecting fillers such as balloon expansion and then injecting the fillers.

Bone cement is widely used in the medical field, mainly for the fixation of artificial joint prostheses. The bone cement stirrer is a device for stirring bone cement and an adhesive, generally, the bone cement is stirred by a stirring rod in a non-closed container through manual work, but the stirring is not uniform and is not energy-saving and environment-friendly enough, and air bubbles are easily mixed in the bone cement to influence the final use performance of the bone cement. Therefore, in view of the above situation, there is an urgent need to develop a bone cement mixer to overcome the disadvantages of the current practical application.

Disclosure of Invention

An object of an embodiment of the present invention is to provide a bone cement mixer, so as to solve the problems mentioned in the background art.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

a bone cement stirrer comprises an upper shell and a lower shell which are oppositely arranged, wherein an elastic telescopic cylinder is connected between the upper shell and the lower shell, and the upper shell can axially and elastically move relative to the lower shell; a lower rotating shaft is arranged in the middle of the inner side of the lower shell, a driving motor connected with the lower rotating shaft is arranged at the bottom of the lower shell, and a plurality of groups of stirring mechanisms are circumferentially distributed on the lower rotating shaft on the inner side of the lower shell;

an air exhaust cavity communicated with the inner space of the upper shell is formed in the top of the upper shell, an upper rotating shaft capable of being in linkage fit with the lower rotating shaft is installed in the middle of the inner side of the upper shell, and the upper end of the upper rotating shaft extends into the air exhaust cavity and is connected with air exhaust fan blades arranged in the air exhaust cavity; the middle of the top of the air suction cavity is connected with an exhaust pipe with a valve, and the other end of the exhaust pipe is connected with a filter.

As a further scheme of the invention: the lower side of the upper shell is circumferentially provided with a plurality of sliding rods, and the upper side of the lower shell is circumferentially provided with a plurality of sliding grooves which correspond to the sliding rods in a sliding fit manner.

As a further scheme of the invention: the elastic telescopic cylinder is of an arc-shaped concave structure in the middle, the upper end of the elastic telescopic cylinder is fixedly connected to the inner side wall of the lower end of the upper shell in a sealing mode, the lower end of the elastic telescopic cylinder is fixedly connected to the inner side wall of the upper end of the lower shell in a sealing mode, and the elastic telescopic cylinder is made of medical environment-friendly rubber materials.

As a further scheme of the invention: the inner space of the upper shell is communicated with the air pumping cavity through a plurality of air exhaust holes which are circumferentially distributed and arranged on the top of the upper shell.

As a further scheme of the invention: a holding ring is further arranged above the outer side of the upper shell and is fixedly connected with the upper shell through a plurality of upper supporting rods which are distributed in the circumferential direction; a support ring is further arranged below the outer side of the lower shell and is fixedly connected with the lower shell through a plurality of lower support rods which are distributed circumferentially; the surfaces of the holding ring and the supporting ring are also provided with rubber layers.

As a further scheme of the invention: go up the lower extreme of pivot and seted up flexible chamber, flexible chamber is gone up the cooperation and is slided and be provided with the universal driving shaft, flexible intracavity still is provided with the spring, and the lower extreme and the universal driving shaft of spring are connected fixedly, and the upper end and the flexible chamber top of spring are connected fixedly, the lower extreme installation of universal driving shaft is fixed with the linkage head, and the linkage head is the prismatic table structure, and the top of lower pivot is seted up can with linkage head linkage complex linkage groove, works as after linkage head and linkage groove cooperation are connected, the lower pivot can drive the synchronous rotation of last pivot.

As a further scheme of the invention: the rabbling mechanism includes first oblique puddler, the oblique puddler of second, C shape stirring ring and horizontal puddler, the horizontal puddler is fixed to be set up in pivot down, and bilateral symmetry is provided with C shape stirring ring about the outer end of horizontal puddler, and the upper and lower bilateral still symmetry of horizontal puddler is provided with the oblique puddler of second, and the one end of the oblique puddler of second is fixed to be set up on the horizontal puddler, and the other end and the C shape stirring ring of the oblique puddler of second are connected, the middle part of the oblique puddler of second is fixed in the installation of first oblique puddler.

As a further scheme of the invention: the first oblique puddler is on a parallel with the oblique puddler setting of second of horizontal puddler opposite side, and the contained angle size between oblique puddler of second and the horizontal puddler is 15 ~ 30.

Compared with the prior art, the embodiment of the invention has the beneficial effects that:

1) the upper shell and the lower shell can move relatively elastically and stably, and the elastic telescopic cylinder has the function of guiding materials to enter and exit through the structural arrangement of the elastic telescopic cylinder;

2) the driving motor works to drive the lower rotating shaft to rotate, so that the stirring mechanism can stir bone cement, and the special structures of the first inclined stirring rod, the second inclined stirring rod and the C-shaped stirring ring are arranged, so that the stirring mechanism has a better stirring effect on the bone cement, has no dead angle in stirring and has high efficiency;

3) in the process of stirring bone cement, the upper shell is pressed until the linkage head is matched and connected with the linkage groove, so that the upper rotating shaft and the lower rotating shaft can synchronously rotate, then the valve is opened, bubbles generated in the stirring process can be emptied through the arrangement of the exhaust holes, and meanwhile, gas with pungent smell is sucked out and filtered and removed through the filter, so that the influence of the pungent gas is avoided;

4) the linkage head can elastically stretch relative to the upper rotating shaft, so that mechanical abrasion and noise generated when the linkage head is in fit connection with the linkage groove can be reduced, and linkage is smoother;

5) when the upper rotating shaft and the lower rotating shaft are in linkage fit rotation, the rotating speed of the lower rotating shaft is influenced, so that the stirring frequency of the stirring mechanism can be changed, and the bone cement can be further fully stirred;

6) through the setting of controlling ring and support ring, can conveniently operate and lower casing stable support the upper casing respectively.

In conclusion, the device is energy-saving and environment-friendly by arranging the linkage matching structure for stirring and air exhaust, and can ensure that the bone cement achieves good biomechanical property, thereby ensuring that the bone cement is more ideal to be filled.

Drawings

Fig. 1 is a partial sectional structural schematic diagram of an embodiment of the invention.

Fig. 2 is a schematic structural diagram of a linkage part of the lower rotating shaft and the upper rotating shaft in the embodiment of the invention.

Fig. 3 is a schematic structural diagram of an agitation mechanism in an embodiment of the present invention.

FIG. 4 is a schematic view of an embodiment of an air extractor blade.

In the figure: 1-a holding ring, 2-an upper stay bar, 3-an upper shell, 4-a sliding bar, 5-a sliding groove, 6-a lower shell, 7-a supporting ring, 8-a lower stay bar, 9-a driving motor, 10-a lower rotating shaft, 11-a stirring mechanism, 12-a linkage head, 13-an elastic telescopic cylinder, 14-an upper rotating shaft, 15-an exhaust hole, 16-a filter, 17-an exhaust pipe, 18-a valve, 19-an air pumping fan blade, 20-an air pumping cavity, 21-an inlet and outlet port, 22-a linkage shaft, 23-a telescopic cavity, 24-a spring, 25-a linkage groove, 26-a first inclined stirring bar, 27-a second inclined stirring bar, 28-C-shaped stirring ring and 29-a horizontal stirring bar.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Example 1

Referring to fig. 1-4, in an embodiment of the present invention, a bone cement mixer includes an upper housing 3 and a lower housing 6, which are oppositely disposed, where the upper housing 3 is a cylindrical barrel with a lower opening, the lower housing 6 is a cylindrical barrel with an upper opening, an elastic telescopic barrel 13 is connected between the upper housing 3 and the lower housing 6, and the upper housing 3 can axially and elastically move relative to the lower housing 6, and a seal between the upper housing 3 and the lower housing 6 is realized through the elastic telescopic barrel 13; a lower rotating shaft 10 is installed in the middle of the inner side of the lower shell 6, a driving motor 9 connected with the lower rotating shaft 10 is fixedly arranged at the bottom of the lower shell 6, the driving motor 9 can drive the lower rotating shaft 10 to rotate, a plurality of groups of stirring mechanisms 11 are circumferentially distributed and installed on the lower rotating shaft 10 on the inner side of the lower shell 6, and the stirring mechanisms 11 are used for stirring bone cement; an air extracting cavity 20 communicated with the inner space of the upper shell 3 is formed in the top of the upper shell 3, an upper rotating shaft 14 which can be in linkage fit with the lower rotating shaft 10 is installed in the middle of the inner side of the upper shell 3, the upper end of the upper rotating shaft 14 extends into the air extracting cavity 20 and is connected with air extracting fan blades 19 arranged in the air extracting cavity 20, the air extracting fan blades 19 adopt the existing structure shown in fig. 4, and the air extracting fan blades 19 are used for enabling air in the air extracting cavity 20 to flow from bottom to top; the middle of the top of the pumping cavity 20 is connected with an exhaust pipe 17, the exhaust pipe 17 is provided with a valve 18, the other end of the exhaust pipe 17 is connected with a filter 16, bubbles generated in the process of emptying and stirring are facilitated through the exhaust pipe 17, and meanwhile gas with pungent smell is sucked out and removed, so that the influence of the pungent gas is avoided.

Furthermore, a plurality of sliding rods 4 are circumferentially distributed and mounted on the lower side of the upper shell 3, a plurality of sliding grooves 5 which are in corresponding sliding fit with the sliding rods 4 are circumferentially distributed and formed on the upper side of the lower shell 6, and the arrangement of the sliding rods 4 and the sliding grooves 5 is favorable for relative movement between the upper shell 3 and the lower shell 6; elastic expansion cylinder 13 is middle part arc indent structure, and elastic expansion cylinder 13's the sealed fixed connection in upper end on the lower extreme inside wall of last casing 3, elastic expansion cylinder 13's the sealed fixed connection of lower extreme on the upper end inside wall of casing 6 down, just elastic expansion cylinder 13 adopts medical environmental protection rubber materials to make.

Further, the inner space of the upper casing 3 is communicated with the air exhaust cavity 20 through a plurality of air exhaust holes 15 distributed on the top circumference of the upper casing.

Further, the top of the upper shell 3 is also provided with a material inlet and outlet 21 communicated with the inner space of the upper shell 3, and the material inlet and outlet 21 is used for feeding and discharging materials.

Furthermore, a holding ring 1 is further arranged above the outer side of the upper shell 3, the holding ring 1 is fixedly connected with the upper shell 3 through a plurality of upper support rods 2 which are circumferentially distributed, and the upper shell 3 is convenient to operate through the arrangement of the holding ring 1; a support ring 7 is further arranged below the outer side of the lower shell 6, the support ring 7 is fixedly connected with the lower shell 6 through a plurality of lower support rods 8 which are circumferentially distributed, and the lower shell 6 can be stably supported through the support ring 7; the surfaces of the holding ring 1 and the supporting ring 7 are also provided with rubber layers (not shown), so that the hand feeling of holding and the stability of supporting can be improved.

Further, as shown in fig. 2, flexible chamber 23 has been seted up to the lower extreme of last pivot 14, and the cooperation slides on the flexible chamber 23 and is provided with universal driving shaft 22, in order to avoid universal driving shaft 22 to rotate, universal driving shaft 22 can be prismatic structure, still be provided with spring 24 in the flexible chamber 23, spring 24's lower extreme and universal driving shaft 22 are connected fixedly, and spring 24's upper end and flexible chamber 23 top are connected fixedly, the lower extreme installation of universal driving shaft 22 is fixed with linkage head 12, and linkage head 12 is the terrace with edge structure, and linkage groove 25 that can link up complex with linkage head 12 is seted up at the top of lower pivot 10, and after linkage head 12 and linkage groove 25 cooperation are connected, lower pivot 10 can drive last pivot 14 synchronous rotation.

Example 2

Referring to fig. 1 and 3, the present embodiment is different from embodiment 1 in that:

in this embodiment, the stirring mechanism 11 includes a first oblique stirring rod 26, a second oblique stirring rod 27, a C-shaped stirring ring 28 and a horizontal stirring rod 29, the horizontal stirring rod 29 is fixedly disposed on the lower rotating shaft 10, the C-shaped stirring ring 28 is symmetrically disposed on both sides of the outer end of the horizontal stirring rod 29, the second oblique stirring rod 27 is further symmetrically disposed on both sides of the horizontal stirring rod 29, one end of the second oblique stirring rod 27 is fixedly disposed on the horizontal stirring rod 29, the other end of the second oblique stirring rod 27 is connected with the C-shaped stirring ring 28, the first oblique stirring rod 26 is fixedly mounted in the middle of the second oblique stirring rod 27, the first oblique stirring rod 26 is parallel to the second oblique stirring rod 27 on the other side of the horizontal stirring rod 29, the included angle between the second oblique stirring rod 27 and the horizontal stirring rod 29 is 15-30 °, and by providing the stirring mechanism 11 with this special structure, has better stirring and evenly mixing effect on the bone cement.

The bone cement stirrer has the following outstanding advantages in practical application:

1) the upper shell 3 and the lower shell 6 can move relatively elastically and stably, and the elastic telescopic cylinder 13 has the function of guiding materials to enter and exit;

2) the driving motor 9 works to drive the lower rotating shaft 10 to rotate, the stirring mechanism 11 can stir bone cement, and the special structures of the first inclined stirring rod 26, the second inclined stirring rod 27 and the C-shaped stirring ring 28 have better stirring effect on the bone cement, no dead angle is caused during stirring, and the efficiency is high;

3) in the process of stirring bone cement, the upper shell 3 is pressed until the linkage head 12 is matched and connected with the linkage groove 25, so that the upper rotating shaft 14 and the lower rotating shaft 10 can synchronously rotate, then the valve 18 is opened, bubbles generated in the stirring process can be emptied through the arrangement of the exhaust hole 15, and meanwhile, gas with pungent smell is sucked out and filtered and discharged through the filter 16, so that the influence of the pungent gas is avoided;

4) by arranging the linkage head 12 to be elastically telescopic relative to the upper rotating shaft 14, mechanical abrasion and noise generated when the linkage head 12 is in matched connection with the linkage groove 25 can be reduced, and linkage is smoother;

5) when the upper rotating shaft 14 and the lower rotating shaft 10 are in linkage fit rotation, the rotating speed of the lower rotating shaft 10 is influenced, so that the stirring frequency of the stirring mechanism 11 is changed, and the bone cement can be further fully stirred;

6) through the arrangement of the holding ring 1 and the supporting ring 7, the operation of the upper shell 3 and the stable support of the lower shell 6 can be respectively facilitated.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.

Claims

1. The bone cement stirrer comprises an upper shell (3) and a lower shell (6) which are oppositely arranged, and is characterized in that an elastic telescopic cylinder (13) is connected between the upper shell (3) and the lower shell (6), and the upper shell (3) can axially and elastically move relative to the lower shell (6); a lower rotating shaft (10) is installed in the middle of the inner side of the lower shell (6), a driving motor (9) connected with the lower rotating shaft (10) is arranged at the bottom of the lower shell (6), and a plurality of groups of stirring mechanisms (11) are circumferentially distributed and installed on the lower rotating shaft (10) on the inner side of the lower shell (6);

an air suction cavity (20) communicated with the inner side space of the upper shell (3) is formed in the top of the upper shell (3), an upper rotating shaft (14) which can be in linkage fit with the lower rotating shaft (10) is installed in the middle of the inner side of the upper shell (3), and the upper end of the upper rotating shaft (14) extends into the air suction cavity (20) and is connected with air suction fan blades (19) arranged in the air suction cavity (20); the middle of the top of the air pumping cavity (20) is connected with an exhaust pipe (17) with a valve (18), and the other end of the exhaust pipe (17) is connected with a filter (16);

a plurality of sliding rods (4) are circumferentially distributed and mounted on the lower side of the upper shell (3), and a plurality of sliding grooves (5) which are correspondingly matched with the sliding rods (4) in a sliding manner are circumferentially distributed and formed on the upper side of the lower shell (6);

the elastic telescopic cylinder (13) is of an arc-shaped concave structure at the middle part, the upper end of the elastic telescopic cylinder (13) is fixedly connected to the inner side wall of the lower end of the upper shell (3) in a sealing manner, the lower end of the elastic telescopic cylinder (13) is fixedly connected to the inner side wall of the upper end of the lower shell (6) in a sealing manner, and the elastic telescopic cylinder (13) is made of medical environment-friendly rubber materials;

go up the lower extreme of pivot (14) and seted up flexible chamber (23), flexible chamber (23) are gone up the cooperation and are slided and are provided with universal driving shaft (22), still be provided with spring (24) in flexible chamber (23), the lower extreme and universal driving shaft (22) of spring (24) are connected fixedly, and the upper end and the flexible chamber (23) top of spring (24) are connected fixedly, the lower extreme installation of universal driving shaft (22) is fixed with linkage head (12), and linkage head (12) are the terrace with edge structure, and the top of lower pivot (10) is seted up can with linkage head (12) linkage complex linkage groove (25), works as behind linkage head (12) and linkage groove (25) cooperation connection, pivot (10) can drive pivot (14) synchronous rotation down.

2. Bone cement mixer according to claim 1, characterized in that the inner space of the upper housing (3) is connected to the suction chamber (20) through a plurality of exhaust holes (15) distributed circumferentially in the top thereof.

3. The bone cement mixer according to claim 1, characterized in that a holding ring (1) is further arranged above the outer side of the upper housing (3), and the holding ring (1) is connected and fixed with the upper housing (3) through a plurality of upper support rods (2) distributed in the circumferential direction; a support ring (7) is further arranged below the outer side of the lower shell (6), and the support ring (7) is fixedly connected with the lower shell (6) through a plurality of lower support rods (8) which are distributed in the circumferential direction; rubber layers are arranged on the surfaces of the holding ring (1) and the supporting ring (7).

4. The bone cement mixer according to any one of claims 1-3, wherein the mixing mechanism (11) comprises a first inclined mixing rod (26), a second inclined mixing rod (27), a C-shaped mixing ring (28) and a horizontal mixing rod (29), the horizontal mixing rod (29) is fixedly arranged on the lower rotating shaft (10), the C-shaped mixing ring (28) is symmetrically arranged on the upper side and the lower side of the outer end of the horizontal mixing rod (29), the second inclined mixing rod (27) is further symmetrically arranged on the upper side and the lower side of the horizontal mixing rod (29), one end of the second inclined mixing rod (27) is fixedly arranged on the horizontal mixing rod (29), the other end of the second inclined mixing rod (27) is connected with the C-shaped mixing ring (28), and the first inclined mixing rod (26) is fixedly arranged in the middle of the second inclined mixing rod (27).

5. The cement mixer according to claim 4, characterized in that the first diagonal agitator bar (26) is arranged parallel to the second diagonal agitator bar (27) on the other side of the horizontal agitator bar (29), and the angle between the second diagonal agitator bar (27) and the horizontal agitator bar (29) is 15-30 °.