Pressing type bone cement applicator

Abstract

The invention relates to the technical field of medical instruments, in particular to a pressing type bone cement applicator which comprises an ampoule bottle twist-off system, a mixing system and a powder storage cavity. The ampoule bottle twist-off system comprises an ampoule bottle containing cavity and a twist-off structure which are connected. The ampoule bottle accommodating cavity is communicated with the powder storage cavity; the mixing system is connected with the powder storage cavity; and a bone cement outlet pipe is arranged at the bottom of the powder storage cavity. According to the pressing type bone cement applicator provided by the invention, the ampoule bottle twist-off system, the mixing system and the powder storage cavity are matched, so that bone cement is mixed and conveyed without separation operation, the operation process is simplified, the efficiency is improved, liquid components and powder components can be mixed in a closed environment, and the application range of the pressing type bone cement applicator is widened. Bone cement is mixed under the condition that the bone cement does not need to be exposed to air, so that potential safety hazards are eliminated, and the safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a pressing type bone cement applicator. BACKGROUND

[0002] Bone cement, especially polymethyl methacrylate bone cement, is a key material widely used in orthopedic surgery, often used for vertebroplasty, kyphoplasty, artificial joint prosthesis fixation and bone defect filling, etc. Its typical application process includes two independent stages: mixing stage and delivery stage.

[0003] In the mixing stage, the surgical staff needs to manually or mechanically stir the powdered polymer and liquid monomer in a special mixing container. This process aims to obtain a homogeneous, bubble-free bone cement paste. After mixing is completed, the operator needs to use a spatula or other tool to manually scrape the mixed bone cement from the mixing container and transfer it to a separate syringe or delivery device.

[0004] In the delivery stage, the operator uses a separate bone cement syringe for injection. Since the mixing and delivery devices are separate, the entire process is cumbersome and inefficient. SUMMARY

[0005] To solve the problem of cumbersome operation process of bone cement in the prior art, the present application provides a pressing type bone cement applicator, which simultaneously introduces an ampoule breaking system, a mixing system and a powder storage cavity, so that the bone cement applicator can have mixing and delivery functions, thereby simplifying the operation steps, improving the efficiency and solving the problem of cumbersome operation process of bone cement in the prior art.

[0006] The technical solution adopted by the present application to solve its technical problems is: A pressing type bone cement applicator, comprising an ampoule breaking system, a mixing system and a powder storage cavity; wherein, The ampoule breaking system comprises an ampoule containing cavity and a breaking structure connected thereto; The ampoule containing cavity is in communication with the powder storage cavity; The mixing system is connected to the powder storage cavity; The bottom of the powder storage cavity is provided with a bone cement outlet pipe.

[0007] Optionally, the mixing system comprises a stirring assembly and a conveying assembly; the stirring assembly comprises a stirring rod and a stirrer connected to the bottom of the stirring rod; the conveying assembly comprises a conveying sleeve and a plunger connected to the bottom of the conveying sleeve; the conveying sleeve and the plunger are sleeved outside the stirring rod, the conveying sleeve and the plunger are located above the stirrer, and the stirrer and the plunger are located in the powder storage cavity.

[0008] Optionally, the stirring rod is provided with a locking pin, and the conveying sleeve is provided with a locking hole matched with the locking pin.

[0009] Optionally, the stirring rod comprises a stirring handle.

[0010] Optionally, the mixing system further comprises a barrel, and the barrel is sleeved outside the conveying assembly.

[0011] Optionally, the mixing system further comprises a plunger locking system; the plunger locking system is arranged between the barrel and the conveying assembly.

[0012] Optionally, the bottom of the powder storage cavity is provided with a bone cement outlet pipe; the outer end of the bone cement outlet pipe is provided with a port plug.

[0013] Optionally, the end of the bone cement outlet pipe is provided with a luer lock; the luer lock is located inside the port plug.

[0014] Optionally, the bottom of the powder storage cavity is provided with an air outlet; the outer end of the air outlet is provided with an air outlet cover.

[0015] Optionally, the bottom plate of the powder storage cavity is provided with a vacuum film.

[0016] The beneficial effects of the present application are: The press-type bone cement applicator provided by the present application is matched with the ampoule bottle twist-breaking system, the mixing system and the powder storage cavity, so that the mixing and conveying of the bone cement do not need to be operated separately, which not only simplifies the operation process and improves the efficiency, but also enables the mixing of the liquid component and the powder component to be carried out in a closed environment, so that the mixing of the bone cement can be realized without exposure to air, thereby helping to eliminate safety hazards and improve safety. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings and examples.

[0018] Figure 1 is a structure diagram of the press-type bone cement applicator in the present application Figure 1 ; Figure 2 is a structure diagram of the press-type bone cement applicator in the present applicationFigure 2 ; Figure 3 This is the present invention. Figure 2 Sectional view along line AA; Figure 4 This is an assembly diagram of the twist-off structure and the ampoule when the ampoule is not opened in this invention. Figure 5 This is an assembly diagram of the twist-off structure and the ampoule when the ampoule is opened in this invention. Figure 6 This is a simplified structural diagram of the press-type bone cement applicator when it is not opened in this invention; Figure 7 This is the present invention. Figure 6 A magnified view of a section at point B in the middle; Figure 8 This is a simplified structural diagram of the press-type bone cement applicator that is opened in this invention; Figure 9 This is the present invention. Figure 8 A magnified view of a section at point C; Figure 10 The structure of the hybrid system in this invention is simplified. Figure 1 ; Figure 11 This is the present invention. Figure 10 Sectional view along the DD direction; Figure 12 This is the present invention. Figure 11 A magnified view of a section at point E in the middle; Figure 13 The structure of the hybrid system in this invention is simplified. Figure 2 ; Figure 14 This is the present invention. Figure 13 Sectional view along the FF direction; Figure 15 This is the present invention. Figure 14 A magnified view of a section at point G in the middle; Figure 16 This is a simplified structural diagram of the locking pin in this invention; Figure 17 The structure of the plunger locking system in this invention is simple. Figure 1 ; Figure 18 The structure of the plunger locking system in this invention is simple. Figure 2 ; Figure 19 This is a simplified assembly diagram of the plunger locking system and the mixing system in this invention; Figure 20 This is a simplified structural diagram of the press-type bone cement applicator when the plunger locking system of the present invention is in the locked state; Figure 21 This is the present invention. Figure 20 A cross-sectional view along the HH direction; Figure 22 is a structure diagram of the press-type bone cement applicator when the plunger locking system is in the open state in the present application; Figure 23 is a structure diagram of the press-type bone cement applicator when the plunger locking system is in the open state in the present application; Figure 22 is a sectional view in the direction of I-I in the present application.

[0019] In the figure: 1 - ampoule twist-off system; 11 - ampoule containing cavity; 111 - bottle body containing part; 112 - cap containing part; 1121 - liquid delivery hole; 1122 - protrusion; 12 - twist-off structure; 121 - cap clamping part; 122 - twist-off handle; 1221 - limiting clamping plate; 1222 - mounting groove; 123 - rotating shaft; 124 - handle fixing shell; 2 - mixing system; 21 - stirring assembly; 211 - stirring rod; 2111 - stirring handle; 2112 - connecting through hole; 2113 - first clamping buckle; 212 - stirrer; 213 - lock pin; 2131 - sub-lock pin; 2132 - female lock pin; 2133 - first spring; 2134 - limiting hole; 214 - lock pin rod; 2141 - lock pin handle; 2142 - second clamping buckle; 22 - delivery assembly; 221 - delivery sleeve; 222 - plunger; 223 - lock hole; 23 - barrel; 231 - mounting groove; 2311 - pressing through hole; 24 - plunger locking system; 241 - clamping ring; 2411 - clamping groove; 2412 - mounting hole; 2413 - clamping block; 2414 - pressing protrusion; 242 - second spring; 3 - powder storage cavity; 31 - bone cement outlet pipe; 311 - port plug; 312 - luer lock; 32 - air outlet; 321 - air outlet cover; 33 - vacuum film; 4 - ampoule. DETAILED DESCRIPTION

[0020] The present application will now be further described in detail. The examples described below are exemplary and are intended to serve to explain the present application and are not to be understood as limiting the present application, all other examples which can be obtained by a person of ordinary skill in the art based on the examples of the present application without creative effort fall within the scope of the present application.

[0021] In the description of the present application, it should be understood that the terms "first", "second" are only used to simplify the description and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0022] In the present application, unless otherwise explicitly specified and limited, a first feature is "on" or "under" a second feature, which can include that the first feature and the second feature are in direct contact, or that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature, which includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature, which includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0024] In order to solve the problem of complicated operation process of bone cement in the prior art, the present application provides a pressing type bone cement applicator, as shown in Figures 1-3 The pressing type bone cement applicator comprises an ampoule breaking system 1, a mixing system 2 and a powder storage cavity 3. The ampoule breaking system 1 comprises an ampoule containing cavity 11 and a breaking structure 12 connected in series. The ampoule containing cavity 11 is in communication with the powder storage cavity 3. The mixing system 2 is connected with the powder storage cavity 3. A bone cement outlet pipe 31 is arranged at the bottom of the powder storage cavity 3.

[0025] The ampoule containing cavity 11 is used for storing an ampoule 4 containing liquid components. The powder storage cavity 3 is used for storing powder components. During use, the ampoule 4 in the ampoule containing cavity 11 is opened by the breaking structure 12. The liquid components in the ampoule 4 flow out and enter the powder storage cavity 3. Then the liquid components and the powder components in the powder storage cavity 3 are mixed by the mixing system 2 to obtain bone cement. The bone cement is delivered to a suitable position through the bone cement outlet pipe 31 at the bottom of the powder storage cavity 3.

[0026] Specifically, the ampoule containing cavity 11 comprises a bottle body containing part 111 and a bottle cap containing part 112 in communication. The bottle body containing part 111 is used for containing the bottle body part of the ampoule 4. In order to improve stability, the inner diameter of the bottle body containing part 111 is preferably matched with the outer diameter of the ampoule 4, so that the bottle body part of the ampoule 4 is clamped by the bottle body containing part 111 to avoid falling off. Alternatively, a limiting structure suitable for the bottle body of the ampoule 4 can be arranged in the bottle body containing part 111 to prevent the ampoule 4 from shifting or falling off. The bottle cap containing part 112 is used for containing the bottle cap of the ampoule 4. The breaking structure 12 is used for separating the bottle cap and the bottle body of the ampoule 4 to open the ampoule 4. As shown in Figure 4 、 Figure 5As shown, the twist-off structure 12 comprises a bottle cap clamping part 121 and a twist-off handle 122 connected together; the bottle cap clamping part 121 is located in the bottle cap accommodating part 112 and is adapted to the bottle cap of the ampoule 4 so as to clamp the bottle cap of the ampoule 4; the twist-off handle 122 is located outside the bottle cap accommodating part 112 so as to drive the bottle cap clamping part 121 to move by rotating the twist-off handle 122 to open the ampoule 4; the bottom of the bottle cap accommodating part 112, i.e. the side of the bottle cap accommodating part 112 away from the bottle body accommodating part 111, is provided with a liquid delivery hole 1121 so as to deliver the liquid component stored in the ampoule 4 to the powder storage cavity 3 through the liquid delivery hole 1121 after the ampoule 4 is opened, and realize the mixing of the liquid component and the powder component.

[0027] Specifically, when it is needed to open the ampoule 4, the ampoule twist-off system 1 is rotated so that the bottle cap accommodating part 112 is located at the top; the twist-off handle 122 located outside the bottle cap accommodating part 112 is rotated, since the twist-off handle 122 is connected with the bottle cap clamping part 121, the rotation of the twist-off handle 122 drives the bottle cap clamping part 121 connected therewith to move, so that the bottle cap clamping part 121 drives the bottle cap of the ampoule 4 clamped thereby to move, and the relative movement and dislocation between the bottle cap and the bottle body of the ampoule 4 is caused, and then the ampoule 4 is separated and opened; the ampoule twist-off system 1 is rotated again so that the bottle cap accommodating part 112 is located at the bottom, and the liquid component stored in the ampoule 4 is delivered to the corresponding component, i.e. the powder storage cavity 3, through the liquid delivery hole 1121, and the mixing with the powder component is completed.

[0028] Referring to Figures 3-5 As shown, the preferred twist-off structure 12 of the present application further comprises a rotating shaft 123; one end of the rotating shaft 123 is connected with the bottle cap clamping part 121, and the other end is connected with the twist-off handle 122; and the rotating shaft 123 is rotationally connected with the bottle cap accommodating part 112.

[0029] When the ampoule 4 is opened, the twist-off handle 122 is rotated to drive the rotating shaft 123 to rotate relative to the bottle cap accommodating part 112, and then drive the bottle cap clamping part 121 to rotate in the bottle cap accommodating part 112, and the bottle cap clamping part 121 drives the bottle cap clamped thereby to rotate, since the position of the bottle body in the bottle body accommodating part 111 does not change, the twist-off and separation of the bottle cap and the bottle body can be realized when the bottle cap rotates.

[0030] In order to facilitate operation, the preferred angle α between the bottle cap clamping part 121 and the twist-off handle 122 is further preferred to be in the range of 90°<α<180°.

[0031] Since the break handle 122 is located outside the ampoule accommodating cavity 11 in the application, in order to avoid the ampoule 4 from being opened due to the break handle 122 being touched by mistake during transportation and the like, the application preferably further comprises a handle fixing shell 124; the handle fixing shell 124 is simultaneously sleeved on the outside of the bottle cap accommodating part 112 and the break handle 122, so as to ensure that the break handle 122 cannot rotate relative to the bottle cap accommodating part 112, thereby avoiding the ampoule 4 from being opened due to being touched by mistake. When the ampoule 4 needs to be opened, the handle fixing shell 124 is removed, and the break handle 122 is rotated.

[0032] Since the break handle 122 drives the bottle cap clamping part 121 to rotate to open the ampoule 4 in the application, after the ampoule 4 is opened, the bottle cap is located at the side of the bottle body, so that the liquid component in the bottle body can flow out; in order to avoid the opened bottle cap from being reset to hinder the liquid component in the bottle body from flowing out, the application further preferably comprises a limiting stop plate 1221 arranged on the break handle 122, so as to avoid the break handle 122 from being reset by the limiting stop plate 1221 being clamped with the bottom of the bottle cap accommodating part 112 after the ampoule 4 is opened, thereby avoiding the opened bottle cap from blocking the bottle body, and further ensuring that the liquid component stored in the ampoule 4 can flow out smoothly.

[0033] Further, the application preferably comprises a protrusion 1122 arranged on the bottom of the bottle cap accommodating part 112 and matched with the limiting stop plate 1221, so as to improve the stability of the limiting by the protrusion 1122 being clamped with the limiting stop plate 1221.

[0034] The application further preferably comprises a mounting groove 1222 arranged on the break handle 122, and the limiting stop plate 1221 is arranged in the mounting groove 1222, so as to reduce the operation difficulty while ensuring the clamping stability.

[0035] In order to ensure that the ampoule 4 can be opened smoothly, the application preferably comprises that the cross-sectional area of the bottle cap accommodating part 112 is larger than the cross-sectional area of the bottle body accommodating part 111, so as to form a moving space of the bottle cap clamping part 121 in the bottle cap accommodating part 112.

[0036] The application cooperates the ampoule break system 1, the mixing system 2 and the powder storage cavity 3, so that the mixing and conveying of the bone cement do not need to be separated, which not only simplifies the operation process and improves the efficiency, but also enables the mixing of the liquid component and the powder component to be carried out in a closed environment, so that the mixing of the bone cement can be realized without being exposed to the air, thereby helping to eliminate the safety hazard and improve the safety.

[0037] In order to realize the mixing of the liquid component and the powder component, referring to Figures 10-15As shown, the preferred mixing system 2 of the present invention includes a stirring assembly 21 and a conveying assembly 22; wherein the stirring assembly 21 includes a stirring rod 211 and a stirrer 212 connected to the bottom of the stirring rod 211, preferably an impeller; it should be noted that, in the present invention, the bottom of the stirring rod 211 refers to the position located below the stirring rod 211 during stirring; the conveying assembly 22 includes a conveying sleeve 221 and a plunger 222 connected to the bottom of the conveying sleeve 221; the conveying sleeve 221 and the plunger 222 are both sleeved on the outside of the stirring rod 211, and both the conveying sleeve 221 and the plunger 222 are located above the stirrer 212, and both the stirrer 212 and the plunger 222 are located in the powder storage chamber 3, so that after the liquid component is added to the powder storage chamber 3 where the powder component is stored, the stirring rod 211 drives the stirrer 212 to mix the liquid component and the powder component; after the mixing is completed, the mixed bone cement is conveyed to the corresponding part through the plunger 222.

[0038] During the use of this bone cement mixing system, after adding the liquid monomer to the solid powder, the stirring rod 211 is moved up and down first. The stirring rod 211 drives the agitator 212 to move up and down to mix the cement. To improve the mixing effect, the stirring rod 211 can be rotated to drive the agitator 212 to rotate, thereby further improving the uniformity of the mixture.

[0039] Specifically, the present invention preferably uses a stirring rod 211 to drive the stirrer 212 to move up and down, stirring the cement, and rotating it for 60 seconds each at the top and bottom of the powder storage chamber 3 to improve the mixing effect. During the mixing process, the stirring rod 211 is not connected to the conveying component 22, so the conveying component 22 does not move with the stirring rod 211. To take into account the conveying function, the present invention preferably also includes a connecting structure for connecting the stirring rod 211 to the conveying component 22. This connecting structure can be a snap-fit ​​structure, a locking pin structure, etc. After the mixing is completed, the stirring rod 211 is connected to the conveying component 22 through this connecting structure, so that the stirring rod 211 can drive the conveying component 22 to move, thereby realizing the conveying of the mixed bone cement.

[0040] To achieve the conveying function, the present invention preferably connects the stirring rod 211 and the conveying sleeve 221 through a connecting structure. Specifically, the present invention preferably provides a locking pin 213 on the stirring rod 211 and a locking hole 223 adapted to the locking pin 213 on the conveying sleeve 221. The locking pin 213 and the locking hole 223 together constitute the connecting structure. After mixing is completed, the connection between the stirring assembly 21 and the conveying assembly 22 is achieved by inserting the locking pin 213 into the locking hole 223. Then, the plunger 222 can be moved by moving the stirring rod 211, thereby realizing the conveying of bone cement.

[0041] The locking pin 213 can be designed as a telescopic structure, such as being connected to the inside or outside of the stirring rod 211 by a spring. When the locking pin 213 is not aligned with the locking hole 223, the locking pin 213 is not released, the stirring rod 211 is not connected to the conveying sleeve 221, and can move relative to the conveying sleeve 221, thereby achieving the mixing of bone cement while the conveying component 22 remains stationary. After mixing is completed, the locking pin 213 is aligned with the locking hole 223, the locking pin 213 is released and inserted into the locking hole 223, thereby connecting the stirring rod 211 with the conveying component 2, and thus the conveying component 22 can be moved by the stirring rod 211 to convey bone cement.

[0042] In a further preferred embodiment, the locking hole 223 is located above the conveying sleeve 221, and the locking pin 213 is located in the middle of the stirring rod 211, so as to avoid the inability to fully mix the bone cement during the mixing process due to the locking pin 213 being inserted into the locking hole 223.

[0043] Furthermore, the preferred arrangement of the locking pin 213 and the locking hole 223 is determined according to the distance between the plunger 222 and the agitator 212. This allows the locking pin 213 and the locking hole 223 to be at the same height after mixing, by pulling the agitator 211 upward until the agitator 212 and the plunger 222 are in contact. Then, by rotating the agitator 211, the angles of the locking pin 213 and the locking hole 223 are made to coincide, thereby allowing the locking pin 213 to be inserted into the locking hole 223, thus connecting the agitator 21 and the conveying assembly 22. At this time, the plunger 222 is in contact with the agitator 212, and the agitator 211 is connected to the conveying sleeve 221. Therefore, the bone cement can be conveyed by the synchronous movement of the plunger 222 and the agitator 212.

[0044] See Figure 16 As shown, the preferred locking pin 213 of the present invention includes a connected sub-locking pin 2131 and a female locking pin 2132, and a spring sleeved on the outside of the sub-locking pin 2131, referred to as the first spring 2133; the outer diameter of the sub-locking pin 2131 is smaller than the outer diameter of the female locking pin 2132; the sub-locking pin 2131, the female locking pin 2132 and the first spring 2133 are all disposed inside the stirring rod 211, one end of the first spring 2133 abuts against the inner wall of the stirring rod 211, and the other end abuts against the female locking pin 2132; the stirring rod 211 is provided with a connecting through hole 2112 adapted to the female locking pin 2132; after mixing is completed, when the locking pin 213 is moved to the position corresponding to the locking hole 223, under the action of the first spring 2133, the female locking pin 2132 passes through the connecting through hole 2112 and is inserted into the locking hole 223, thereby realizing the connection between the stirring assembly 21 and the conveying assembly 22.

[0045] To facilitate control of the state of the locking pin 213, the present invention preferably provides a limiting hole 2134 on the female locking pin 2132; the stirring assembly 21 also includes a locking pin rod 214; the locking pin rod 214 is disposed inside the stirring rod 211 and is suitable for insertion into the limiting hole 2134 to limit the locking pin 213.

[0046] Specifically, the present invention preferably provides an insertion hole in the stirring rod 211 suitable for placing the locking pin 214. The locking pin 214 is inserted into the stirring rod 211 through the insertion hole and passes through the limiting hole 2134, so that the first spring 2133 is in a compressed state, preventing the locking pin 213 from being released. After mixing is completed, the stirring rod 211 can be pulled up until the stirrer 212 and the plunger 222 are in contact. Then the locking pin 214 is pulled out, and the stirring rod 211 is rotated so that the locking pin 213 is aligned with the locking hole 223. At this time, under the action of the first spring 2133, the female locking pin 2132 pops out and inserts into the locking hole 223. After hearing a click, it indicates that the stirring rod 211 and the conveying assembly 22 are now fixed to each other, realizing the connection between the stirring assembly 21 and the conveying assembly 22.

[0047] For ease of operation, the present invention preferably includes a stirring handle 2111 in the stirring rod 2111, so as to drive the stirrer 212 to move through the stirring handle 2111 to achieve mixing, or to drive the stirrer 212 and plunger 222 to move through the stirring handle 2111 to achieve the delivery of bone cement.

[0048] Furthermore, the present invention preferably includes a locking pin handle 2141 connected to the upper end, the locking pin handle 2141 being adapted to engage with the stirring handle 2112.

[0049] Specifically, the present invention preferably has a first buckle 2113 on the stirring handle 2111 and a second buckle 2142 adapted to the first buckle 2113 on the locking handle 2141. Before the conveying operation, the first buckle 2113 and the second buckle 2142 are engaged to connect the locking handle 2141 to the stirring handle 2111. During the mixing process, the locking handle 2141 and the stirring handle 2111 move together to keep the locking rod 214 inserted into the limiting hole 2134, preventing the locking pin 213 from popping out, thereby preventing the stirring rod 211 from connecting to the conveying assembly 22 and ensuring the smooth progress of the mixing process. After the mixing is completed, the stirring handle 2111 is pulled upward until the stirrer 212 and the plunger 222 are in contact, and the locking handle 2141 is rotated counterclockwise by 90 degrees. Then pull it upwards and remove it from the equipment. Slightly rotate the stirring handle 2111 until the locking pin 213 is engaged in the locking hole 223. After hearing a click, it indicates that the stirring rod 211 and the conveying sleeve 221 are fixed together and can perform linear and rotary movements to convey bone cement.

[0050] To further improve the stability and aesthetics of the structure, the mixing system 2 of the present invention preferably includes a cylinder 23, which is sleeved on the outside of the conveying assembly 22. The lower end of the cylinder 23 is connected to the powder storage cavity 3. Furthermore, the cylinder 23 is preferably made of transparent material, so as to facilitate observation of the relative position between the conveying sleeve 221 and the stirring rod 211 while providing aesthetics.

[0051] Preferably, the cylinder 23 can move relative to the conveying sleeve 221 to ensure smooth conveying. To facilitate control of the conveying process, the mixing system 2 of the present invention preferably also includes a plunger locking system 24. The plunger locking system 24 is disposed between the cylinder 23 and the conveying assembly 22.

[0052] The plunger locking system 24 is used to lock the conveying sleeve 221, so that the conveying sleeve 221 cannot move relative to the cylinder 23 when locked. When conveying operation is required, the plunger locking system 24 is opened, so that the conveying sleeve 221 can move relative to the cylinder 23, thereby realizing the control of the conveying process.

[0053] For details, see Figure 17 , 18 As shown, the plunger locking system 24 includes a retaining ring 241 and a return spring, denoted as the second spring 242; wherein, see Figure 19 As shown, the inner side of the retaining ring 241 is provided with a groove 2411 for placing the delivery sleeve 221. In order to facilitate the control of the plunger, the inner diameter of the groove 2411 is larger than the outer diameter of the delivery sleeve 221. The outer side of the retaining ring 241 is provided with a mounting hole 2412, and the second spring 242 is disposed in the mounting hole 2412.

[0054] The retaining ring 241 of the plunger locking system 24 is placed inside the cylinder 23, and the delivery sleeve 221 is positioned in the retaining groove 2411. Simultaneously, the end of the second spring 242 away from the retaining ring 241 abuts against the inner wall of the cylinder 23. (See also...) Figures 20-21 As shown, when the second spring 242 is not compressed, under the action of the second spring 242, the side of the slot 2411 near the second spring 242 is close to the delivery sleeve 221, squeezing the delivery sleeve 221 to fix it; when the plunger 222 needs to move, see... Figures 22-23As shown, the outer side of the retaining ring 241 is pressed. Specifically, the side of the retaining ring 241 opposite to the mounting hole 2412 is pressed. Under the pressure, the second spring 242 is compressed, causing the inner wall of the groove 2411 to separate from the delivery sleeve 221, thereby allowing the plunger 222 to move freely in the vertical direction. After the pressing is released, under the action of the delivery sleeve 221, the inner wall of the groove 2411 re-presses and fixes the delivery sleeve 221, thereby fixing the plunger 222.

[0055] The slot 2411 in this invention can be either circular or semi-circular. To ensure control effectiveness while simplifying the structure, the slot 2411 is preferably semi-circular, that is, the cross-section of the slot 2411 is preferably semi-circular.

[0056] To improve the clamping effect, the present invention preferably provides a clamping block 2413 in the slot 2411 so that the conveying sleeve 221 can be squeezed and fixed by the clamping block 2413 when fixing the conveying sleeve 221; further preferably, the inner side of the clamping block 2413 is an arc-shaped structure to increase the contact area between the clamping block 2413 and the conveying sleeve 221 and improve the stability of the fixation.

[0057] The present invention further preferably has the diameter of the inner arc-shaped structure of the clamping block 2413 being consistent with the outer diameter of the conveying sleeve 221, so that when the clamping block 2413 comes into contact with the conveying sleeve 221, its inner side can be completely fitted with the outer diameter of the conveying sleeve 221, thereby further improving the stability and reliability of the fixation.

[0058] Furthermore, the present invention preferably provides an anti-slip structure on the inner side of the clamping block 2413 to increase the friction between the clamping block 2413 and the conveying sleeve 221, thereby increasing reliability.

[0059] Accordingly, the outer side of the conveying sleeve 221 is also provided with an anti-slip structure; the anti-slip structure on the inner side of the clamping block 2413 and the outer side of the conveying sleeve 221 can be anti-slip protrusions, etc., and the anti-slip structure is preferably an anti-slip texture.

[0060] For ease of operation, the present invention preferably provides a pressing protrusion 2414 on the outer side of the retaining ring 241, so as to release the plunger locking system by means of the pressing protrusion 2414; specifically, the present invention preferably provides the pressing protrusion 2414 opposite to the mounting hole 2412, so as to apply pressure to the pressing protrusion 2414 to cause the second spring 242 to contract and open the plunger locking system 24.

[0061] Furthermore, the present invention preferably provides a mounting groove 231 on the cylinder 23 that is compatible with the plunger locking system 24, so as to improve the stability of the structure by placing the retaining ring 241 in the mounting groove 231.

[0062] For ease of operation, the present invention preferably provides a pressing through hole 2311 on the mounting groove 231. The pressing through hole 2311 is adapted to the pressing protrusion 2414 so that the pressing protrusion 2414 can be installed in the pressing through hole 2311 and the pressing protrusion 2414 can be pressed through the pressing through hole 2311, thereby reducing the difficulty of operation.

[0063] Preferably, the outer end of the bone cement outlet pipe 31 is provided with a port plug 311 so that the bone cement outlet pipe 31 can be sealed by the port plug 311 when no conveying operation is being performed, thereby ensuring the airtightness of the powder storage chamber 3 and preventing the bone cement from being exposed to air.

[0064] For ease of operation, the present invention preferably provides a Luer lock 312 at the end of the bone cement outlet pipe 31; and the Luer lock 312 is located inside the port plug 311.

[0065] The bottom of the powder storage chamber 3 in the press-type bone cement applicator provided by the present invention is provided with an air outlet 32; an air outlet cover 321 is provided at the outer end of the air outlet 32.

[0066] Furthermore, the present invention preferably provides a vacuum membrane 33 on the bottom plate of the powder storage cavity 3, which allows air to pass through but blocks powder or bone cement from passing through.

[0067] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A press-type bone cement applicator, characterized in that, Includes an ampoule twist-off system (1), a mixing system (2), and a powder storage chamber (3); wherein, The ampoule twist-off system (1) includes an ampoule receiving cavity (11) and a twist-off structure (12) connected together. The ampoule container cavity (11) is connected to the powder storage cavity (3); The mixing system (2) is connected to the powder storage chamber (3); The bottom of the powder storage chamber (3) is provided with a bone cement outlet pipe (31).

2. The press-type bone cement applicator as described in claim 1, characterized in that, The mixing system (2) includes a stirring assembly (21) and a conveying assembly (22); the stirring assembly (21) includes a stirring rod (211) and a stirrer (212) connected to the bottom of the stirring rod (211); the conveying assembly (22) includes a conveying sleeve (221) and a plunger (222) connected to the bottom of the conveying sleeve (221); the conveying sleeve (221) and the plunger (222) are both sleeved on the outside of the stirring rod (211), the conveying sleeve (221) and the plunger (222) are both located above the stirrer (212), and the stirrer (212) and the plunger (222) are both located inside the powder storage chamber (3).

3. The press-type bone cement applicator as described in claim 2, characterized in that, The stirring rod (211) is provided with a locking pin (213), and the conveying sleeve (221) is provided with a locking hole (223) that matches the locking pin (213).

4. The press-type bone cement applicator as described in claim 3, characterized in that, The stirring rod (211) includes a stirring handle (2111).

5. The press-type bone cement applicator as described in claim 2, characterized in that, The mixing system (2) also includes a cylinder (23) which is fitted over the outside of the conveying assembly (22).

6. The press-type bone cement applicator as described in claim 5, characterized in that, The mixing system (2) further includes a plunger locking system (24); the plunger locking system (24) is disposed between the cylinder (23) and the conveying assembly (22).

7. The press-type bone cement applicator as described in any one of claims 1-6, characterized in that, The outer end of the bone cement outlet pipe (31) is provided with a port plug (311).

8. The press-type bone cement applicator as described in claim 7, characterized in that, The end of the bone cement outlet pipe (31) is provided with a Luer lock (312); the Luer lock (312) is located inside the port plug (311).

9. The press-type bone cement applicator as described in claim 7, characterized in that, The bottom of the powder storage chamber (3) is provided with an air outlet (32); the outer end of the air outlet (32) is provided with an air outlet cover (321).

10. The press-type bone cement applicator as described in claim 7, characterized in that, A vacuum membrane (33) is provided on the bottom plate of the powder storage cavity (3).

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