Closed bone cement mixing device

Abstract

The utility model relates to the technical field of bone cement mixing, in particular to a closed bone cement mixing device, which is reasonable in structural design and mainly comprises a mixing cylinder, a cylinder cover and a stirring driving seat, the mixing cylinder comprises a cylinder body, a rotating shaft, a driven face gear, a stirring rod and a wall scraping component, the cylinder cover can seal a mixing cavity at the upper part of the cylinder body, and the stirring driving seat is arranged on the cylinder body. Bone cement mixing is carried out in a closed environment, and leakage of harmful gas is prevented; the stirring driving seat can drive the rotating shaft, the stirring rod on the rotating shaft and the wall scraping assembly to rotate through the driven face gear, the stirring rod is used for fully stirring, and the wall scraping assembly can timely scrape powder materials such as calcium phosphate attached to the inner wall, so that the powder materials fully participate in mixing, and the situation that bone cement is diluted due to the fact that raw materials are reduced is avoided. The hardness of the bone cement is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of bone cement mixing, in particular to a closed bone cement mixing device. Background Art

[0002] Bone cement is a common name for bone adhesives. Bone cement is a medical material used in orthopedic surgery. Because some of its physical properties and appearance and properties after solidification are quite similar to white cement used in construction and decoration, it has the popular name of bone cement. In the prior art, when mixing bone cement, the bone cement raw materials are first put into a bone cement mixing device to make a bone cement material with calcium phosphate salt as the main body. Then, the mixture of calcium phosphate salt powder after stirring is hydrated with the liquid phase for blending. It can self-solidify under physiological conditions of 37°C temperature and 100% humidity. Through the hydration reaction, a solidified product similar to human bone tissue is obtained - hydroxyapatite or pentetrahydroapatite, which is the main material of bone cement.

[0003] Traditional bone cement mixing devices have shortcomings when in use. Their stirring mechanism does not have a wall scraping function. When calcium phosphate is added into the bone cement during stirring, powder materials such as calcium phosphate are easily contaminated on the inner wall of the container. If solvents such as saline are added into the container to make bone cement, the bone cement will become thinner due to the reduction of raw materials, affecting the hardness of the bone cement.

[0004] Therefore, it is necessary to optimize and improve the traditional bone cement mixing device. Utility Model Content

[0005] The purpose of the utility model is to overcome the above problems existing in the traditional technology and provide a closed bone cement mixing device.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] A closed bone cement mixing device comprises a mixing drum, a drum cover installed at the upper end of the mixing drum and a stirring drive seat installed at the lower end of the mixing drum; the mixing drum comprises a drum body, a mixing chamber is provided at the upper part of the drum body, an external threaded portion is provided at the upper end of the drum body, an internal threaded groove and a clamping groove are provided at the lower end of the drum body, a rotating shaft is movably supported in the mixing chamber, the lower end of the rotating shaft is connected to a driven face gear extending into the clamping groove, a stirring rod and a wall scraping assembly are installed on the outside of the shaft body of the rotating shaft located in the mixing chamber, the wall scraping assembly is composed of a transverse sleeve, a transverse support rod, a transverse compression spring and a scraper, two transverse support rods are slidingly restricted in the transverse sleeve, a transverse compression spring is connected between the inner ends of the two transverse support rods, and a scraper is fixed to the outer end of the transverse support rod.

[0008] Furthermore, in the above-mentioned closed bone cement mixing device, the cylinder cover is provided with an internal thread structure matching with the external thread part.

[0009] Furthermore, in the above-mentioned closed bone cement mixing device, the scraper is provided with a scraping blade for contacting with the inner wall of the mixing chamber.

[0010] Furthermore, in the above-mentioned closed bone cement mixing device, the stirring drive seat includes a base, the upper end of the base is provided with a threaded column that cooperates with the internal thread groove and a snap-on convex column that cooperates with the snap-on groove, a stirring motor is embedded in the base, a hexagonal column is snap-on installed in the output shaft of the stirring motor, a driving face gear is installed on the top of the hexagonal column, a vertical compression spring is sleeved on the outer side of the hexagonal column, and a vertical slide groove for facilitating the vertical displacement of the driving face gear and a movable cavity for facilitating the rotation of the output shaft and the hexagonal column are provided inside the snap-on convex column.

[0011] Furthermore, in the above-mentioned closed bone cement mixing device, a hexagonal slot matching with the hexagonal column is provided in the output shaft of the stirring motor.

[0012] Furthermore, in the above-mentioned closed bone cement mixing device, the driving face gear can be connected with the driven face gear to form a face gear transmission structure.

[0013] The beneficial effects of the utility model are:

[0014] The utility model has a reasonable structural design and is mainly composed of a mixing cylinder, a cylinder cover and a stirring drive seat. The mixing cylinder includes a cylinder body, a rotating shaft, a driven surface gear, a stirring rod and a wall scraping assembly. The cylinder cover can seal the mixing chamber on the upper part of the cylinder body, so that bone cement mixing is carried out in a closed environment to prevent leakage of harmful gases; the stirring drive seat can drive the rotating shaft and the stirring rod and the wall scraping assembly thereon to rotate through the driven surface gear. The stirring rod is used for sufficient stirring. The wall scraping assembly can timely scrape off powder materials such as calcium phosphate salts contaminated on the inner wall so that they can fully participate in the mixing, thereby avoiding the situation where the bone cement is thinner due to less raw materials, thereby affecting the hardness of the bone cement.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the mixing cylinder in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the wall scraping component part of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the stirring drive seat in the utility model;

[0021] Figure 5 It is a structural schematic diagram of the output shaft in the utility model;

[0022] Figure 6 It is a schematic diagram of the structure of the hexagonal column in the utility model;

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1-mixing cylinder, 101-cylinder body, 102-mixing chamber, 103-external threaded portion, 104-internal threaded groove, 105-clamping groove, 106-rotating shaft, 107-driven surface gear, 108-stirring rod, 109-transverse sleeve, 110-transverse support rod, 111-transverse compression spring, 112-scraper, 2-inner cover, 3-stirring drive seat, 301-base, 302-threaded column, 303-clamping convex column, 304-stirring motor, 305-output shaft, 306-hexagonal column, 307-driving surface gear, 308-vertical compression spring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-Figure 6 As shown, this embodiment provides a closed bone cement mixing device, including a mixing barrel 1, a barrel cover 2 installed at the upper end of the mixing barrel 1, and a stirring drive seat 3 installed at the lower end of the mixing barrel 1.

[0027] In this embodiment, the mixing barrel 1 includes a barrel 101, a mixing chamber 102 is provided at the upper part of the barrel 101, an external threaded portion 103 is provided at the upper end of the barrel 101, an internal thread groove 104 and a clamping groove 105 are provided at the lower end of the barrel 101, a rotating shaft 106 is movably supported in the mixing chamber 102, and a driven face gear 107 extending into the clamping groove 105 is connected at the lower end of the rotating shaft 106. The rotating shaft 106 is located outside the shaft body of the mixing chamber 102 and is equipped with a stirring rod 108 and a wall scraping assembly. The wall scraping assembly is composed of a transverse sleeve 109, a transverse support rod 110, a transverse compression spring 111 and a scraper 112. The transverse sleeve 109 is fixed on the rotating shaft 106, and two transverse support rods 110 are slidingly restricted in the transverse sleeve 109, a transverse compression spring 111 is connected between the inner ends of the two transverse support rods 110, and a scraper 112 is fixed at the outer end of the transverse support rod 110.

[0028] In this embodiment, the cylinder cover 2 is provided with an internal thread structure that matches the external thread portion 103 .

[0029] In this embodiment, the scraper 112 is provided with a scraping edge for contacting with the inner wall of the mixing chamber 102 .

[0030] In this embodiment, the stirring drive seat 3 includes a base 301, and the upper end of the base 301 is provided with a threaded column 302 that matches the internal thread groove 104 and a clamping convex column 303 that matches the clamping groove 105. A stirring motor 304 is embedded and installed in the base 301, and a hexagonal column 306 is clamped and installed in the output shaft 305 of the stirring motor 304. A driving face gear 307 is installed at the top of the hexagonal column 306, and a vertical compression spring 308 is sleeved on the outer side of the hexagonal column 306. A vertical slide groove is provided inside the clamping convex column 303 to facilitate the vertical displacement of the driving face gear 307 during the docking process with the driven face gear 107, and a movable cavity is provided to facilitate the rotation of the output shaft 305 and the hexagonal column 306.

[0031] In this embodiment, a hexagonal slot matching with the hexagonal column 306 is provided in the output shaft 305 of the stirring motor 304 .

[0032] In this embodiment, the driving face gear 307 can be connected with the driven face gear 107 to form a face gear transmission structure.

[0033] A specific application of this embodiment is: this device is mainly composed of a mixing drum 1, a drum cover 2 and a stirring drive seat 3. The mixing drum 1 includes a drum body 101, a rotating shaft 106, a driven surface gear 107, a stirring rod 108 and a scraping assembly. The drum cover 2 can seal the mixing chamber 102 on the upper part of the drum body 101, so that the bone cement mixing is carried out in a closed environment to prevent the leakage of harmful gases; the stirring drive seat 3 can drive the rotating shaft 106 and the stirring rod 108 and the scraping assembly thereon to rotate through the driven surface gear 107. The stirring rod 108 is used for sufficient stirring. The scraping assembly can scrape off the powder materials such as calcium phosphate salts contaminated on the inner wall in time to allow them to fully participate in the mixing, thereby avoiding the situation where the bone cement becomes thinner due to the reduction of raw materials, thereby affecting the hardness of the bone cement.

[0034] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A closed bone cement mixing device, characterized in that: The mixing drum comprises a mixing drum, a drum cover installed at the upper end of the mixing drum and a stirring drive seat installed at the lower end of the mixing drum; the mixing drum comprises a drum body, a mixing chamber is provided at the upper part of the drum body, an external thread portion is provided at the upper end of the drum body, an internal thread groove and a clamping groove are provided at the lower end of the drum body, a rotating shaft is movably supported in the mixing chamber, a driven face gear is connected at the lower end of the rotating shaft and extends into the clamping groove, a stirring rod and a wall scraping assembly are installed at the outer side of the shaft body of the rotating shaft located in the mixing chamber, the wall scraping assembly is composed of a transverse sleeve, a transverse support rod, a transverse compression spring and a scraper, two transverse support rods are slidingly restricted in the transverse sleeve, a transverse compression spring is connected between the inner ends of the two transverse support rods, and a scraper is fixed at the outer end of the transverse support rod.

2. The closed bone cement mixing device according to claim 1, characterized in that: The cylinder cover is provided with an internal thread structure matched with the external thread part.

3. The closed bone cement mixing device according to claim 1, characterized in that: The scraper is provided with a scraping edge which is convenient for abutting against the inner wall of the mixing chamber.

4. The closed bone cement mixing device according to claim 1, characterized in that: The stirring drive seat includes a base, the upper end of the base is provided with a threaded column matched with the internal thread groove and a clamping convex column matched with the clamping groove, a stirring motor is embedded in the base, a hexagonal column is clamped in the output shaft of the stirring motor, a driving face gear is installed on the top of the hexagonal column, a vertical compression spring is sleeved on the outer side of the hexagonal column, a vertical slide groove for facilitating the vertical displacement of the driving face gear and a movable cavity for facilitating the rotation of the output shaft and the hexagonal column are provided inside the clamping convex column.

5. The closed bone cement mixing device according to claim 4, characterized in that: The output shaft of the stirring motor is provided with a hexagonal slot matched with the hexagonal column.

6. The closed bone cement mixing device according to claim 4, characterized in that: The driving face gear can be connected with the driven face gear to form a face gear transmission structure.

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