Small centrifugal machine for laboratory

Abstract

The invention is suitable for the technical field of centrifugal machines, and provides a small centrifugal machine for a laboratory, which comprises a machine body, a machine cover, a centrifugal chamber, a centrifugal motor and a control panel, and further comprises a fixed cylinder, a fixing and limiting mechanism, a fixed block, a square centrifugal frame, a circular centrifugal frame and a limiting and controlling mechanism, one end of the fixing and limiting mechanism is matched with the clamping groove, and the limiting and controlling mechanism comprises a control assembly and a limiting assembly. According to the small centrifugal machine for the laboratory, through the mode that the fixing and limiting mechanism is matched with the clamping groove, rapid connection between the square centrifugal frame or the circular centrifugal frame and the output end of the centrifugal motor can be achieved, and the replacement time of the square centrifugal frame or the circular centrifugal frame is shortened; the limiting assembly can limit the end, protruding out of the fixing cylinder, of the fixing and limiting mechanism, the connecting stability between the square centrifugal frame or the round centrifugal frame and the fixing cylinder is ensured, and the connecting strength between the centrifugal frame and the fixing cylinder is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifuges, and in particular relates to a small centrifuge used in laboratories. Background Art

[0002] Centrifugation is to use the strong centrifugal force generated by the high-speed rotation of the centrifuge rotor to accelerate the sedimentation rate of particles in the liquid and separate substances with different sedimentation coefficients and buoyancy densities in the sample. The centrifuge is an instrument that uses the centrifugal force generated by rotation to separate substances of different densities and particle sizes in suspensions or emulsions, or to analyze them while separating. It has a wide range of applications and is suitable for use in laboratories such as chemical, food, pharmaceutical, environmental protection, mining, and teaching.

[0003] The existing small centrifuge used in the laboratory comprises a box body, a box cover, a centrifugal device, and a battery; the box body and the box cover are connected by a hinge, a lock assembly is arranged at the connection between the box body and the box cover, a sight glass is arranged on the upper part of the box cover, the sight glass is made of organic transparent glass, the centrifugal device is arranged in the box body, the battery is arranged on the left side of the centrifugal device, a sound-absorbing layer is arranged on the inner surface of the box body and the box cover, and the sound-absorbing layer is made of sound-absorbing sponge; the centrifugal device comprises a motor, a motor bracket, a rotating shaft, a connecting plate, a test tube bracket, and a shock absorber; a refrigeration device is arranged in the box body.

[0004] In laboratory small centrifuges, due to the different types of centrifugal substances, the centrifugal test tubes used are also different. Different types of centrifugal test tubes require test tube racks of different specifications for support, which makes the replacement of test tube racks an issue that cannot be ignored. The test tube racks in existing small centrifuges are generally directly locked on the shaft or rotor with fixing screws. Although this design ensures the stability of the test tube rack, it takes a lot of time to replace it, which will directly affect the working efficiency of the centrifuge.

[0005] Therefore, in view of the above situation, there is an urgent need to develop a small centrifuge for laboratory use to overcome the shortcomings in current practical applications. Summary of the invention

[0006] In view of the shortcomings of the prior art, an object of the embodiments of the present invention is to provide a small centrifuge for laboratory use to solve the problems in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A small centrifuge for laboratory use, comprising a body, a cover rotatably mounted on the body, a centrifugal chamber opened inside the body, a centrifugal motor installed in the centrifugal chamber, a control panel electrically connected to the centrifugal motor installed on one side of the body, and further comprising:

[0009] A fixed cylinder, wherein the fixed cylinder is fixed concentrically to the output end of the centrifugal motor by fixing bolts, wherein the fixed cylinder is circumferentially provided with a clamping groove and a slide groove A parallel to its axial direction, wherein the fixed cylinder is circumferentially provided with a slide groove B parallel to its radial direction, wherein the slide groove B is connected to the slide groove A, and wherein the slide groove B is located between the slide groove A and the clamping groove;

[0010] A fixed limit mechanism, one end of which extends into the fixed cylinder and matches with the slot, and one end of which protrudes out of the fixed cylinder through the slot, and a fixed block is fixed on the other end of the fixed limit mechanism, and a square centrifugal frame and a circular centrifugal frame are respectively fixed on the fixed block;

[0011] The limit control mechanism includes a control component and a limit component, one end of the control component is slidably installed in the fixed limit mechanism, and one end of the control component extends to the outside of the fixed limit mechanism and intermittently conflicts with the limit component, the other end of the control component passes through the fixed block and extends to the top of the fixed block, the two ends of the limit component are respectively installed in the slide groove A and the slide groove B, the end of the limit component located in the slide groove B cooperates with the end of the fixed limit mechanism protruding outside the fixed cylinder, and the end of the limit component located in the slide groove A intermittently conflicts with the end of the control component extending outside the fixed limit mechanism;

[0012] The fixed limit mechanism connects the fixed block and the fixed cylinder as a whole by cooperating with the card slot. The fixed block drives the square centrifugal frame and the circular centrifugal frame thereon to be connected to the fixed cylinder as a whole separately. The square centrifugal frame and the circular centrifugal frame are connected to the fixed cylinder as a whole separately to realize the quick connection of the square centrifugal frame and the circular centrifugal frame separately with the output end of the centrifugal motor. The limiting component releases or restores the limiting of the end of the fixed limit mechanism protruding outside the fixed cylinder by sliding and cooperating with the fixed cylinder and the fixed limit mechanism.

[0013] As a further technical solution of the present invention, the fixed limiting mechanism includes:

[0014] One end of the central column extends into the fixed cylinder, the other end of the central column is provided with a mounting groove for mounting the control component, and the other end of the central column is fixed with a fixing block;

[0015] T-shaped frames circumferentially distributed on the outer wall of one end of the central column, wherein the number of the T-shaped frames is consistent with the number of the slots; and

[0016] A trapezoidal piece is slidably mounted on the T-frame, the inner side of which is movably connected to the T-frame via a spring A, the outer side of which cooperates with the slot and protrudes out of the fixed cylinder through the slot, and the outer side of which intermittently cooperates with one end of the limit assembly located in the slide groove B.

[0017] As a further technical solution of the present invention, the trapezoidal member adopts a strip structure with a trapezoidal shape, and the upper and lower ends of the outer side are respectively set as inclined end surfaces.

[0018] As a further technical solution of the present invention, the control component includes:

[0019] A movable column with one end slidably mounted in the mounting groove, a spring B is mounted between one end of the movable column and the inner wall of the mounting groove, and the other end of the movable column penetrates the fixed block and extends to the top of the fixed block; and

[0020] A control member distributed on the outer wall of one end of the moving column extends outside the central column and intermittently interferes with the limiting assembly.

[0021] As a further technical solution of the present invention, the limit assembly includes:

[0022] A slider having one end slidably mounted in the slide groove A, the other end of the slider extending to the top of the fixed cylinder and contacting the control member, a groove is provided on the side of the slider close to the slide groove B, and the end face of the groove close to the spring C is an inclined end face;

[0023] A spring C installed in the slideway A and connected to the slider; and

[0024] An arc block is slidably installed in the slide groove B. The inner side of the arc block is movably connected to the inner wall of the slide groove B through a spring D. The outer side of the arc block protrudes out of the fixed cylinder and cooperates with the trapezoidal member. One end of the arc block intermittently slides with the slider and the groove.

[0025] As a further technical solution of the present invention, the end face on the inner side of one end of the arc block that matches with the trapezoidal member is an inclined end face.

[0026] As a further technical solution of the present invention, the square centrifugal frame includes a fixed plate and a centrifugal frame A, the fixed plate is fixed on the outer wall of the fixed block and is concentric therewith, four groups of centrifugal frames A are distributed circumferentially on the fixed plate, and the centrifugal frame A is provided with through holes for clamping the centrifugal test tubes, and the circular centrifugal frame includes a centrifugal frame B, the centrifugal frame B is fixed on the outer wall of the fixed block and is concentric therewith, and the centrifugal frame B is provided with through holes along the circumference of its axis.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The fixing mechanism can connect the fixing block and the fixing barrel as a whole by cooperating with the card slot, so that the square centrifugal frame or the circular centrifugal frame on the fixing block can be connected to the fixing barrel as a whole, so as to realize the quick connection between the square centrifugal frame or the circular centrifugal frame and the output end of the centrifugal motor, reduce the replacement time of the square centrifugal frame or the circular centrifugal frame, and improve the working efficiency and convenience of the centrifuge;

[0029] The limiting component can release or restore the limiting of the end of the fixed limit mechanism protruding outside the fixed cylinder, which not only prevents the end from entering the fixed cylinder under high-speed rotation, but also ensures the connection stability between the square centrifuge rack or the round centrifuge rack and the fixed cylinder, thereby ensuring the installation stability of the centrifuge test tube on the square centrifuge rack or the round centrifuge rack, further improving the connection strength between the centrifuge rack and the fixed cylinder, and also facilitates the rapid separation of the fixed limit mechanism from the card slot, thereby reducing the replacement time of the square centrifuge rack or the round centrifuge rack and improving the working efficiency and convenience of the centrifuge.

[0030] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of a small centrifuge for laboratory use provided in an embodiment of the present invention.

[0032] Figure 2 A schematic diagram of the installation structure of a square centrifugal rack provided in an embodiment of the present invention.

[0033] Figure 3 A schematic diagram of the installation structure of a circular centrifugal rack provided in an embodiment of the present invention.

[0034] Figure 4 for Figure 3 An enlarged view of the structure of the middle fixed cylinder, the limiting mechanism, the limiting control mechanism and the fixed block.

[0035] Figure 5 for Figure 4 Structural cross-sectional view of the middle fixed cylinder, fixed limit mechanism, limit control mechanism and fixed block.

[0036] Figure 6 for Figure 4 Structural exploded view of the tilting direction of the fixed block, control assembly and fixed limit mechanism.

[0037] Figure 7 for Figure 4 Exploded view of the structure of the middle limit assembly and the fixed cylinder.

[0038] Figure markings: 100-body, 110-control panel, 200-machine cover, 300-fixed plate, 400-centrifugal frame A, 500-fixed cylinder, 510-slot, 520-slide A, 530-slide B, 600-fixed limit mechanism, 610-center column, 620-T-frame, 630-trapezoidal member, 640-spring A, 650-installation groove, 700-limit control mechanism, 710-control assembly, 711-movable column, 712-control member, 713-spring B, 720-limit assembly, 721-slider, 722-groove, 723-spring C, 724-arc block, 725-spring D, 800-fixed block, 900-centrifugal frame B. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0041] like Figures 1 to 7 As shown, as an embodiment of the present invention, a small centrifuge for laboratory use is provided, including a body 100, a cover 200 is rotatably mounted on the body 100, a centrifugal chamber is opened inside the body 100, a centrifugal motor is installed in the centrifugal chamber, a control panel 110 electrically connected to the centrifugal motor is installed on one side of the body 100, and further includes:

[0042] A fixed cylinder 500, wherein the fixed cylinder 500 is concentrically fixed to the output end of the centrifugal motor by fixing bolts, wherein the fixed cylinder 500 is circumferentially provided with a clamping groove 510 and a slide groove A520 parallel to its axial direction, and wherein the fixed cylinder 500 is circumferentially provided with a slide groove B530 parallel to its radial direction, wherein the slide groove B530 is connected to the slide groove A520, and wherein the slide groove B530 is located between the slide groove A520 and the clamping groove 510;

[0043] A fixed limit mechanism 600, one end of which extends into the fixed cylinder 500 and matches with the slot 510, and one end of which protrudes out of the fixed cylinder 500 through the slot 510, and a fixed block 800 is fixed on the other end of the fixed limit mechanism 600, and a square centrifugal frame or a circular centrifugal frame is fixed on the fixed block 800;

[0044] The control limit mechanism 700 includes a control component 710 and a limit component 720. One end of the control component 710 is slidably installed in the fixed limit mechanism 600, and one end of the control component 710 extends to the outside of the fixed limit mechanism 600 and intermittently conflicts with the limit component 720. The other end of the control component 710 passes through the fixed block 800 and extends to the top of the fixed block 800. The two ends of the limit component 720 are respectively installed in the slide groove A520 and the slide groove B530. The end of the limit component 720 located in the slide groove B530 cooperates with the end of the fixed limit mechanism 600 protruding from the fixed cylinder 500, and the end of the limit component 720 located in the slide groove A520 intermittently conflicts with the end of the control component 710 extending to the outside of the fixed limit mechanism 600.

[0045] In this embodiment, in the initial state, one end of the limiting component 720 located in the slide groove B530 is located on the outside of the card slot 510. When it is necessary to connect the square centrifugal rack or the circular centrifugal rack on the fixed block 800 to the fixed cylinder 500 as a whole, the fixed limit mechanism 600 and the control component 710 move synchronously toward the fixed cylinder 500, and the control component 710 drives the one end of the limiting component 720 located in the slide groove A520 to move downward synchronously in the slide groove A520. The one end of the limiting component 720 located in the slide groove A520 drives the one end of the limiting component 720 located in the slide groove B530 to move in a direction away from the card slot 510 by moving downward. , so that the limiting assembly 720 will not interfere with the limiting mechanism 600 during the process of cooperating with the card slot 510. At the same time, it is also convenient for one end of the limiting mechanism 600 to protrude out of the fixed cylinder 500 through the card slot 510. The limiting mechanism 600 can connect the fixed block 800 and the fixed cylinder 500 as a whole by cooperating with the card slot 510, so that the square centrifugal frame or the circular centrifugal frame on the fixed block 800 can be connected to the fixed cylinder 500 as a whole, so as to realize the quick connection between the square centrifugal frame or the circular centrifugal frame and the output end of the centrifugal motor, reduce the replacement time of the square centrifugal frame or the circular centrifugal frame, and improve the working efficiency and convenience of the centrifuge;

[0046] When one end of the limiting mechanism 600 effectively protrudes out of the fixed cylinder 500, the control component 710 is released, and the control component 710 is separated from the end of the limiting component 720 located in the slide groove A520. The end of the limiting component 720 located in the slide groove A520 drives it to slide in the opposite direction in the slide groove A520 and return to the initial position through its own elastic force. At the same time, it can also drive the end of the limiting component 720 located in the slide groove B530 to move in the opposite direction and return to the initial position. The end of the limiting component 720 located in the slide groove B530 can be limited by returning to the initial position, so that the end of the limiting mechanism 600 protruding out of the fixed cylinder 500 cannot enter the fixed cylinder 500 under high-speed rotation, thereby ensuring the connection stability between the square centrifuge frame or the circular centrifuge frame and the fixed cylinder 500, and further ensuring the installation stability of the centrifuge test tubes on the square centrifuge frame or the circular centrifuge frame, thereby improving the centrifugal quality and efficiency of the centrifuge.

[0047] like Figures 3 to 6 As shown, as a preferred embodiment of the present invention, the fixed limit mechanism 600 includes a center column 610, a T-shaped frame 620, a trapezoidal member 630, a spring A640 and a mounting groove 650, one end of the center column 610 extends into the fixed cylinder 500, the other end of the center column 610 is provided with a mounting groove 650 for installing the control component 710, and the other end of the center column 610 is fixed with a fixed block 800, one end of the center column 610 is circumferentially distributed with T-shaped frames 620 with the same number as the slots 510, a trapezoidal member 630 is slidably installed on the T-shaped frame 620, the inner side of the trapezoidal member 630 is movably connected to the T-shaped frame 620 by the spring A640, the outer side of the trapezoidal member 630 cooperates with the slot 510 and protrudes out of the fixed cylinder 500 through the slot 510, and the outer side of the trapezoidal member 630 intermittently cooperates with one end of the limiting component 720 located in the slide groove B530.

[0048] In this embodiment, when the trapezoidal member 630 moves down to the position where it contacts the inner wall of the fixed cylinder 500, it moves toward the axial direction close to the central column 610, thereby squeezing the spring A640. The spring A640 is in a state of storing force. When the trapezoidal member 630 moves down to the position where it matches the slot 510, the spring A640 drives the trapezoidal member 630 to move quickly toward the axial direction away from the central column 610 through elastic force, so that the upper and lower ends of the outer side of the trapezoidal member 630 are in contact with the slot 510. At the same time, the middle part of the trapezoidal member 630 protrudes out of the fixed cylinder 500 through the slot 510, so that the central column 610 and the fixed block 800 thereon can be quickly connected with the fixed cylinder 500 as a whole, thereby connecting the square centrifugal frame or the circular centrifugal frame on the fixed block 800 with the fixed cylinder 500 as a whole, realizing the quick connection of the square centrifugal frame or the circular centrifugal frame with the output end of the centrifugal motor, reducing the replacement time of the square centrifugal frame or the circular centrifugal frame, and improving the working efficiency and convenience of the centrifuge;

[0049] At the same time, it is also convenient for the end of the limiting component 720 located in the slide groove B530 to quickly cooperate with the trapezoidal member 630, so that the end of the limiting component 720 located in the slide groove B530 completes the limitation of the trapezoidal member 630, so that it cannot enter the fixed cylinder 500 under high-speed rotation, thereby ensuring the connection stability between the square centrifuge frame or the circular centrifuge frame and the fixed cylinder 500, and further ensuring the installation stability of the centrifugal test tube on the square centrifuge frame or the circular centrifuge frame, thereby improving the centrifugal quality and efficiency of the centrifuge.

[0050] In a preferred embodiment, the central column 610 preferably adopts a square column structure, and trapezoidal members 630 are arranged on the four end walls thereof;

[0051] The fixed cylinder 500 preferably adopts a circular cylindrical structure, and a flange fixedly connected to the output end of the centrifugal motor is welded at the bottom thereof, so as to ensure the concentricity of the fixed cylinder 500 and the output end of the centrifugal motor, thereby improving the centrifugal quality and efficiency of the centrifuge.

[0052] like Figures 3 to 6 As shown, as a preferred embodiment of the present invention, the trapezoidal member 630 preferably adopts a strip structure with a trapezoidal shape, and the upper and lower ends of the outer side are respectively set as inclined end faces, so that the trapezoidal member 630 can be quickly matched with the slot 510, and the trapezoidal member 630 can be quickly separated from the slot 510, thereby reducing the connection or separation time of the fixed limit mechanism 600 and the fixed cylinder 500, reducing the replacement time of the centrifuge for the square centrifuge frame or the circular centrifuge frame, and improving the working efficiency and convenience of the centrifuge.

[0053] like Figures 3 to 7As shown, as a preferred embodiment of the present invention, the control component 710 includes a moving column 711, a control member 712 and a spring B713, one end of the moving column 711 is slidably installed in the mounting groove 650, a spring B713 is installed between one end of the moving column 711 and the inner wall of the mounting groove 650, a control member 712 extending to the outside of the central column 610 is distributed on the outer wall of one end of the moving column 711, the control member 712 intermittently interferes with the limit assembly 720, and the other end of the moving column 711 passes through the fixed block 800 and extends to the top of the fixed block 800.

[0054] In this embodiment, before the central column 610 moves into the fixed cylinder 500, the movable column 711 is pressed and driven to move downward in the installation groove 650, and the movable column 711 compresses the spring B713 and puts it in a compressed state. At the same time, the movable column 711 drives the control member 712 to move downward to the limit position;

[0055] The center column 610 drives the trapezoidal member 630 thereon and the control member 712 which has moved down to the extreme position to move down synchronously. In the process that the trapezoidal member 630 moves down to match with the card slot 510, the control member 712 can drive the end of the limit component 720 located in the slide slot A520 to move down synchronously in the slide slot A520 by moving down. The end of the limit component 720 located in the slide slot A520 drives the end of the limit component 720 located in the slide slot B530 to move away from the card slot 510 by moving down, so that the trapezoidal member 630 can move down in the direction away from the card slot 510 when it matches with the card slot 510. During the process, the limiting assembly 720 will not interfere with it. At the same time, it is also convenient for the middle part of the trapezoidal member 630 to protrude out of the fixed cylinder 500 through the card slot 510. The trapezoidal member 630 can connect the fixed block 800 and the fixed cylinder 500 as a whole by cooperating with the card slot 510, so that the square centrifugal frame or the circular centrifugal frame on the fixed block 800 can be connected to the fixed cylinder 500 as a whole, so as to realize the quick connection between the square centrifugal frame or the circular centrifugal frame and the output end of the centrifugal motor, reduce the replacement time of the square centrifugal frame or the circular centrifugal frame, and improve the working efficiency and convenience of the centrifuge;

[0056] When one end of the trapezoidal member 630 effectively protrudes out of the fixed cylinder 500, the movable column 711 is released, and the spring B713 drives the movable column 711 to move in the opposite direction through its own elastic force, and the movable column 711 drives the control member 712 to move in the opposite direction and return to the initial state, and the control member 712 is separated from the limit assembly 720 by the reverse movement, so that the end of the limit assembly 720 located in the slide groove A520 drives it to slide in the opposite direction in the slide groove A520 and return to the initial position through its own elastic force, and at the same time, it can also drive One end of the limiting component 720 located in the slide groove B530 moves in the opposite direction and returns to the initial position. By returning to the initial position, the middle part of the trapezoidal member 630 can be limited so that it cannot enter the fixed cylinder 500 under high-speed rotation, thereby ensuring the connection stability between the square centrifuge frame or the circular centrifuge frame and the fixed cylinder 500, and further ensuring the installation stability of the centrifuge test tube on the square centrifuge frame or the circular centrifuge frame, thereby improving the centrifugal quality and efficiency of the centrifuge.

[0057] In a preferred embodiment, the movable column 711 preferably adopts a circular columnar structure;

[0058] The control member 712 preferably adopts a plate-shaped structure, and the distribution number of the control members 712 is consistent with the distribution number of the trapezoidal members 630.

[0059] like Figures 3 to 7 As shown, as a preferred embodiment of the present invention, the limit assembly 720 includes a slider 721, a groove 722, a spring C723, an arc block 724 and a spring D725. One end of the slider 721 is slidably installed in the slide groove A520 and is connected to the spring C723 installed in the slide groove A520. The other end of the slider 721 extends to the top of the fixed cylinder 500 and contacts the control member 712. The slider 721 is provided with a side close to the slide groove B530 that is slidably matched with the arc block 724. The groove 722 has an end face on the side of the groove 722 close to the spring C723, which is an inclined end face. In this way, when the slider 721 moves upward, the arc block 724 can be helped to quickly move back to the initial position, so that there will be no motion interference between the two. The inner side of the arc block 724 is slidably installed in the slide groove B530, and the outer side of the arc block 724 protrudes out of the fixed cylinder 500 and cooperates with the trapezoidal member 630. The inner side of the arc block 724 is movably connected to the inner wall of the slide groove B530 through the spring D725.

[0060] In this embodiment, in the initial state, the spring D725 can not only drive one end of the arc block 724 to move to the outside of the slot 510 through its own elastic force and the slider 721, but also drive the other end of the arc block 724 to contact the side wall of the slider 721, and at this time, the other end of the arc block 724 does not slide with the groove 722;

[0061] The control member 712 drives the slider 721 and the groove 722 thereon to move downward synchronously, and the slider 721 compresses the spring C723 to make it in a power storage state. When the groove 722 moves downward to a position where it slides with the arc block 724, the spring D725 drives the arc block 724 to move into the groove 722 through its own elastic force, so that one end of the arc block 724 leaves the outer side of the slot 510, thereby making it possible for the arc block 724 to not interfere with the trapezoidal member 630 in the process of cooperating with the slot 510. At the same time, it is also convenient for the middle part of the trapezoidal member 630 to protrude out of the fixed cylinder 500 through the slot 510.

[0062] When the control member 712 moves in the opposite direction and returns to its initial state, the spring C723 drives the slider 721 and the groove 722 thereon to move upward through its own elastic force, and the groove 722 drives the arc block 724 to move in the direction close to the slot 510 by moving upward, and restores it to its initial position. At this time, the arc block 724 is located between the inner side of the trapezoidal member 630 and the outer side of the fixed cylinder 500, so that the middle part of the trapezoidal member 630 can be limited so that it cannot enter the fixed cylinder 500 under high-speed rotation, thereby ensuring the connection stability between the square centrifuge frame or the circular centrifuge frame and the fixed cylinder 500, and further ensuring the installation stability of the centrifugal test tube on the square centrifuge frame or the circular centrifuge frame, thereby improving the centrifugal quality and efficiency of the centrifuge.

[0063] In a preferred embodiment, the center of the arc block 724 is consistent with the center of the slide groove B530, that is, the arc block 724 is concentric with the fixed cylinder 500, so as to ensure that the arc block 724 can effectively move between the trapezoidal member 630 and the fixed cylinder 500, thereby ensuring that the arc block 724 can effectively limit the trapezoidal member 630.

[0064] like Figures 3 to 7As shown, as a preferred embodiment of the present invention, the end face on the inner side of one end of the arc block 724 that cooperates with the trapezoidal member 630 is an inclined end face, so that in the process of the trapezoidal member 630 protruding out of the fixed cylinder 500, even if the arc block 724 conflicts with the trapezoidal member 630, it will not interfere with the movement of the trapezoidal member 630. The trapezoidal member 630 can accelerate the movement rate of the arc block 724 in the groove 722 through the inclined end face on the arc block 724, so that the trapezoidal member 630 can effectively protrude out of the fixed cylinder 500, ensuring that the subsequent arc block 724 can effectively limit the protruding part of the trapezoidal member 630, so that it will not easily enter the fixed cylinder 500, thereby ensuring the centrifugal quality and efficiency of the centrifuge.

[0065] like Figures 1 to 3 As shown, as a preferred embodiment of the present invention, the square centrifuge frame includes a fixed plate 300 and a centrifuge frame A400, the fixed plate 300 is fixed on the outer wall of the fixed block 800 and is concentric therewith, four groups of centrifuge frames A400 are distributed circumferentially on the fixed plate 300, and the centrifuge frame A400 is provided with through holes for clamping the centrifuge test tube, and the circular centrifuge frame includes a centrifuge frame B900, the centrifuge frame B900 is fixed on the outer wall of the fixed block 800 and is concentric therewith, and the centrifuge frame B900 is provided with through holes along the circumference of its axis.

[0066] The working principle of the present invention is:

[0067] In the initial state, the spring D725 can not only drive one end of the arc block 724 to move to the outside of the slot 510 through its own elastic force and the slider 721, but also drive the other end of the arc block 724 to contact the side wall of the slider 721, and at this time, the other end of the arc block 724 does not slide with the groove 722;

[0068] When it is necessary to connect the square centrifugal frame or the circular centrifugal frame on the fixed block 800 with the fixed cylinder 500 as a whole, the fixed limit mechanism 600 and the control component 710 move synchronously toward the fixed cylinder 500. When the trapezoidal member 630 moves down to the inner wall of the fixed cylinder 500, it moves toward the axis direction close to the center column 610, thereby squeezing the spring A640. The spring A640 is in a state of storing force. When the trapezoidal member 630 moves down to a position matching the card slot 510, the spring A640 drives the trapezoidal member 630 to move quickly away from the axis of the center column 610 through the elastic force. The trapezoidal member 630 moves in the same direction, so that the upper and lower ends of the outer side of the trapezoidal member 630 are in conflict with the slot 510. At the same time, the middle part of the trapezoidal member 630 protrudes out of the fixed cylinder 500 through the slot 510. The trapezoidal member 630 cooperates with the slot 510 to realize the central column 610 and the fixed block 800 thereon to be quickly connected with the fixed cylinder 500 as a whole, thereby connecting the square centrifugal frame or the circular centrifugal frame on the fixed block 800 with the fixed cylinder 500 as a whole, realizing the quick connection between the square centrifugal frame or the circular centrifugal frame and the output end of the centrifugal motor, and reducing the replacement time of the square centrifugal frame or the circular centrifugal frame.

[0069] Before the center column 610 moves into the fixed cylinder 500, the moving column 711 is pressed and driven to move downward in the installation groove 650. The moving column 711 compresses the spring B713 and puts it in a compressed state. At the same time, the moving column 711 drives the control member 712 to move downward to the limit position. The center column 610 drives the trapezoidal member 630 thereon and the control member 712 that has moved downward to the limit position to move downward synchronously. In the process of the trapezoidal member 630 moving downward to match the card slot 510, the control member 712 drives the slider 721 and the groove 722 thereon to move synchronously. When the groove 722 moves downward, the slider 721 compresses the spring C723 to store force. When the groove 722 moves downward to the position where the arc block 724 slides, the spring D725 drives the arc block 724 to move into the groove 722 through its elastic force, so that one end of the arc block 724 leaves the outer side of the slot 510, so that the arc block 724 will not interfere with the trapezoidal member 630 in the process of matching with the slot 510. At the same time, it is also convenient for the middle part of the trapezoidal member 630 to protrude out of the fixed cylinder 500 through the slot 510.

[0070] When one end of the trapezoidal member 630 effectively protrudes out of the fixed cylinder 500, the movable column 711 is released, and the spring B713 drives the movable column 711 to move in the opposite direction through its own elastic force, and the movable column 711 drives the control member 712 to move in the opposite direction and return to the initial state, and the spring C723 drives the slider 721 and the groove 722 thereon to move upward through its own elastic force, and the groove 722 drives the arc block 724 to move in the direction close to the slot 510 by moving upward, and restores it to the initial position, at which time the arc block 724 is located between the inner side of the trapezoidal member 630 and the outer side of the fixed cylinder 500, so that the middle part of the trapezoidal member 630 can be limited, so that it cannot enter the fixed cylinder 500 in the high-speed rotation state, thereby ensuring the connection stability between the square centrifuge frame or the circular centrifuge frame and the fixed cylinder 500, and further ensuring the installation stability of the centrifugal test tube on the square centrifuge frame or the circular centrifuge frame;

[0071] The above is the working principle of this small centrifuge used in laboratories.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A small centrifuge for laboratory use, comprising a body, a cover rotatably mounted on the body, a centrifugal chamber disposed inside the body, a centrifugal motor mounted inside the centrifugal chamber, and a control panel electrically connected to the centrifugal motor mounted on one side of the body, characterized in that: Also includes: A fixed cylinder, wherein the fixed cylinder is fixed concentrically to the output end of the centrifugal motor by fixing bolts, wherein the fixed cylinder is circumferentially provided with a clamping groove and a slide groove A parallel to its axial direction, wherein the fixed cylinder is circumferentially provided with a slide groove B parallel to its radial direction, wherein the slide groove B is connected to the slide groove A, and wherein the slide groove B is located between the slide groove A and the clamping groove; A fixed limit mechanism, one end of which extends into the fixed cylinder and matches with the slot, and one end of which protrudes out of the fixed cylinder through the slot, and a fixed block is fixed on the other end of the fixed limit mechanism, and a square centrifugal frame and a circular centrifugal frame are respectively fixed on the fixed block; The limit control mechanism includes a control component and a limit component, one end of the control component is slidably installed in the fixed limit mechanism, and one end of the control component extends to the outside of the fixed limit mechanism and intermittently conflicts with the limit component, the other end of the control component passes through the fixed block and extends to the top of the fixed block, the two ends of the limit component are respectively installed in the slide groove A and the slide groove B, the end of the limit component located in the slide groove B cooperates with the end of the fixed limit mechanism protruding outside the fixed cylinder, and the end of the limit component located in the slide groove A intermittently conflicts with the end of the control component extending outside the fixed limit mechanism; The fixed limit mechanism connects the fixed block and the fixed cylinder as a whole by cooperating with the card slot. The fixed block drives the square centrifugal frame and the circular centrifugal frame thereon to be connected to the fixed cylinder as a whole separately. The square centrifugal frame and the circular centrifugal frame are connected to the fixed cylinder as a whole separately to realize the quick connection of the square centrifugal frame and the circular centrifugal frame separately with the output end of the centrifugal motor. The limiting component releases or restores the limiting of the end of the fixed limit mechanism protruding outside the fixed cylinder by sliding and cooperating with the fixed cylinder and the fixed limit mechanism.

2. The small centrifuge for laboratory use according to claim 1, characterized in that: The limiting mechanism comprises: One end of the central column extends into the fixed cylinder, the other end of the central column is provided with a mounting groove for mounting the control component, and the other end of the central column is fixed with a fixing block; T-shaped frames circumferentially distributed on the outer wall of one end of the central column, wherein the number of the T-shaped frames is consistent with the number of the slots; and A trapezoidal piece is slidably mounted on the T-frame, the inner side of which is movably connected to the T-frame via a spring A, the outer side of which cooperates with the slot and protrudes out of the fixed cylinder through the slot, and the outer side of which intermittently cooperates with one end of the limit assembly located in the slide groove B.

3. The small centrifuge for laboratory use according to claim 2, characterized in that: The trapezoidal member adopts a strip structure with a trapezoidal shape, and the upper and lower ends of the outer side are respectively arranged as inclined end surfaces.

4. The small centrifuge for laboratory use according to claim 2, characterized in that: The control component comprises: A movable column with one end slidably mounted in the mounting groove, a spring B is mounted between one end of the movable column and the inner wall of the mounting groove, and the other end of the movable column penetrates the fixed block and extends to the top of the fixed block; and A control member distributed on the outer wall of one end of the moving column extends outside the central column and intermittently interferes with the limiting assembly.

5. The small centrifuge for laboratory use according to claim 4, characterized in that: The limiting component comprises: A slider having one end slidably mounted in the slide groove A, the other end of the slider extending to the top of the fixed cylinder and contacting the control member, a groove is provided on the side of the slider close to the slide groove B, and the end face of the groove close to the spring C is an inclined end face; A spring C installed in the slideway A and connected to the slider; and An arc block is slidably installed in the slide groove B. The inner side of the arc block is movably connected to the inner wall of the slide groove B through a spring D. The outer side of the arc block protrudes out of the fixed cylinder and cooperates with the trapezoidal member. One end of the arc block intermittently slides with the slider and the groove.

6. The small centrifuge for laboratory use according to claim 5, characterized in that: The end surface on the inner side of one end of the arc block that matches with the trapezoidal piece is an inclined end surface.

7. The small centrifuge for laboratory use according to claim 1, characterized in that: The square centrifugal frame includes a fixed plate and a centrifugal frame A, the fixed plate is fixed on the outer wall of the fixed block and is concentric therewith, four groups of centrifugal frames A are distributed circumferentially on the fixed plate, and the centrifugal frames A are provided with through holes for clamping centrifugal test tubes, and the circular centrifugal frame includes a centrifugal frame B, the centrifugal frame B is fixed on the outer wall of the fixed block and is concentric therewith, and the centrifugal frame B is provided with through holes along the circumference of its axis.

Images