Centrifuge locking device

Abstract

The invention discloses a centrifuge locking device, comprising a centrifugal disk, a centrifuge cover and a knob assembly provided on the centrifugal disk, and the knob assembly being used to fix the centrifuge cover to the centrifugal disk. In the invention, an electromagnet, the knob assembly and an optical coupler cooperate with each other, a block extends into the middle of the optical coupler to block the optical coupler channel, the optical coupler gives a signal, and the centrifuge cover is locked. When the centrifuge cover is automatically unlocked (false triggering or vibration triggering), the rotating shaft rises under the action of an elastic structure, and the block at the lower end of the rotating shaft rises at the same time and disengages from the middle of the optical coupler. After the optical coupler receives the signal and sends it to a host, the host determines whether the motor is still working normally. When the host determines that the motor is rotating normally, two electromagnets are started, and a locking rod is extended into the electromagnet locking hole of the centrifuge cover through the electromagnet positioning hole of the centrifuge disk to prevent the centrifuge cover from being opened. The centrifuge cover can be automatically locked, thereby improving the safety of the centrifuge.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifuges, and in particular to a centrifuge locking device. Background Art

[0002] Existing centrifuge lids typically use a single rotating knob for locking. When the centrifuge is spinning at high speed, the knob can be accidentally opened, causing the centrifuge cup inside to fly out without a securing mechanism or causing injuries if a person accidentally reaches into the centrifuge. Although centrifuge knobs currently have sensors to detect whether they are locked, preventing the high-speed centrifuge cup from stopping immediately after opening, injuries can still occur. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a centrifuge locking device, comprising a centrifugal disc, a centrifuge cover and a knob assembly provided on the centrifugal disc, the knob assembly being used to fix the centrifuge cover to the centrifugal disc, and the centrifuge cover being provided with an electromagnet locking hole;

[0004] An electromagnet is installed below the centrifugal disc. The electromagnet is connected to a locking rod. The locking rod is adapted to the locking hole of the electromagnet. The locking rod is used to cooperate with the knob assembly to lock the centrifuge cover.

[0005] In one embodiment, one end of the centrifuge cover is mounted on the centrifugal disc via a screw pin, and the centrifuge cover is rotatably connected to the centrifugal disc via the screw pin.

[0006] In one embodiment, a fixing block is provided at the connection between the centrifuge cover and the knob assembly, and the fixing block is used to fix the magnet.

[0007] In one embodiment, a Hall switch plate is installed below the centrifugal disk, and the Hall switch plate cooperates with a magnet to determine whether the centrifuge cover is in a closed and locked state.

[0008] In one embodiment, a slot is provided in the centrifuge cover corresponding to the fixing block, and the fixing block is arranged in the slot.

[0009] In one embodiment, the knob assembly includes a knob, which is connected to a rotating shaft via a screw. A rotating shaft copper seat is sleeved on the middle of the rotating shaft, a bracket is installed at the lower end of the rotating shaft copper seat, and a control panel is installed on the bracket.

[0010] In one embodiment, a support block is provided on the bracket, and an elastic structure is installed between the support block and the rotating shaft.

[0011] In one embodiment: the rotating shaft includes a central shaft, a boss is provided at the lower part of the central shaft, a connecting part is provided at the lower part of the central shaft, the connecting part is used to fit the elastic structure, the lower end of the connecting part is connected to a stopper, an optical coupler is provided on one side of the stopper, and the optical coupler is installed on the control board.

[0012] In one embodiment: the rotating shaft copper seat includes a fixed seat, a sleeve is fixedly connected to the middle of the fixed seat, the sleeve is used to insert the rotating shaft, the lower end surface of the sleeve is provided with an inclined surface, the sleeve is provided with a first groove at the lower end of the inclined surface, the sleeve is provided with a second groove at the upper end of the inclined surface, and the sleeve is provided with retaining walls at both ends of the inclined surface.

[0013] In one embodiment, a mounting plane is provided at the lower end of the centrifugal disc, and an electromagnet positioning hole is provided on the mounting plane corresponding to the locking rod, and the electromagnetic positioning hole is used to insert the locking rod.

[0014] Technical effects and advantages of the present invention:

[0015] 1. In the present invention, the knob assembly is provided to cooperate with the optical coupler and shield the optical coupler to detect the knob state, which can greatly improve the safety of the centrifuge.

[0016] 2. In the present invention, the knob assembly is turned upward to facilitate opening the centrifuge cover, and the knob assembly is turned downward to facilitate fixing the centrifuge cover. The Hall device on the Hall switch board is used to detect the position of the magnet to determine whether the centrifuge cover is open or closed.

[0017] 3. In the present invention, the electromagnet, the knob assembly and the optical coupler cooperate, and the block extends into the middle of the optical coupler to block the optical coupler channel. The optical coupler gives a signal that the centrifuge cover has been locked. When the knob is automatically unlocked (false trigger or vibration trigger), the rotating shaft rises under the action of the elastic structure, and the block at the lower end of the rotating shaft rises at the same time and disengages from the middle of the optical coupler. After the optical coupler receives the signal and sends it to the host, the host determines whether the motor is still working normally. When the host determines that the motor is rotating normally, the two electromagnets are started, and the locking rod passes through the electromagnet positioning hole of the centrifugal disk and extends into the electromagnet locking hole of the centrifuge cover to prevent the centrifuge cover from being opened. The centrifuge cover can be automatically locked, thereby improving the safety of the centrifuge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a centrifuge locking device provided in an embodiment of the present application;

[0019] Figure 2 This is another structural schematic diagram of the centrifuge locking device provided in an embodiment of the present application;

[0020] Figure 3 The centrifuge locking device provided in the embodiment of the present application Figure 2 Exploded diagram;

[0021] Figure 4 Schematic diagram of the connection structure of the centrifugal disc in the centrifuge locking device provided in an embodiment of the present application;

[0022] Figure 5 This is a schematic structural diagram of a fixing block in a centrifuge locking device provided in an embodiment of the present application;

[0023] Figure 6 1 is a schematic structural diagram of a knob assembly in a centrifuge locking device provided in an embodiment of the present application;

[0024] Figure 7 This is an exploded view of the knob assembly in the centrifuge locking device provided in an embodiment of the present application;

[0025] Figure 8 Schematic diagram of the structure of the optical coupler in the centrifuge locking device provided in an embodiment of the present application;

[0026] Figure 9 Schematic diagram of the structure of the rotating shaft in the centrifuge locking device provided in an embodiment of the present application;

[0027] Figure 10 This is a schematic diagram of the structure of the copper seat of the rotating shaft in the centrifuge locking device provided in an embodiment of the present application;

[0028] Figure 11 Schematic diagram of the structure of the centrifuge cover in the centrifuge locking device provided in an embodiment of the present application;

[0029] Figure 12 Schematic diagram of the bottom structure of the centrifuge cover in the centrifuge locking device provided in an embodiment of the present application;

[0030] Figure 13 Schematic diagram of the structure of the centrifugal disc in the centrifuge locking device provided in an embodiment of the present application;

[0031] Figure 14 It is a schematic diagram of the structure of the electromagnet in the centrifuge locking device provided in an embodiment of the present application.

[0032] In the figure: 1, knob assembly; 2, centrifuge cover; 3, centrifugal disc; 4, motor; 5, electromagnet; 6, screw pin; 7, Hall switch board; 8, magnet; 9, fixing block; 91, through hole; 92, groove; 93, fixing hole; 11, knob; 12, rotating shaft; 13, rotating shaft copper seat; 14, bracket; 141, supporting block; 15, elastic structure; 16, control board; 161, optical coupler; 17, locking sleeve; 131, fixing seat; 132, sleeve; 133, inclined surface; 134, first groove; 135, first Two grooves; 136, retaining wall; 121, center axis; 122, boss; 123, connecting part; 124, stopper; 125, threaded hole; 126, end face; 31, electromagnet positioning hole; 32, electromagnet mounting screw hole; 33, mounting plane; 34, shaft copper seat mounting hole; 35, shaft copper seat positioning hole; 21, magnet mounting hole; 22, slot; 23, screw mounting hole; 24, locking bevel; 25, mounting hole; 26, observation window; 27, electromagnet locking hole; 51, electromagnet mounting surface; 52, locking rod. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0034] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, in this embodiment, a centrifuge locking device is provided, which is applied to a centrifuge to prevent the knob from being opened by mistake, including a centrifugal disk 3, a centrifuge cover 2 is provided on the centrifugal disk 3, and two centrifuge covers 2 are provided. One end of the centrifuge cover 2 is installed on the centrifugal disk 3 through a screw pin 6, and the centrifuge cover 2 is rotatably connected to the centrifugal disk 3 through the screw pin 6, and the other end of the centrifuge cover 2 is connected to the knob assembly 1, and the knob assembly 1 is fixed to the centrifugal disk 3 by screws. An electromagnet 5 is provided below the centrifugal disk 3 corresponding to each centrifuge cover 2, and a fixing block 9 is provided at the connection between the centrifuge cover 2 and the knob assembly 1. The fixing block 9 is used to fix the magnet 8, and a Hall switch plate 7 is installed below the centrifugal disk 3.

[0035] Specifically, when the two centrifuge covers 2 are closed, the centrifuge covers 2 rotate along the screw pin 6, and the two centrifuge covers 2 rotate to the knob assembly 1, and the position of the centrifuge covers 2 is fixed by the knob assembly 1. At the same time, the magnet 8 attracts the Hall device on the Hall switch board 7. The Hall device on the Hall switch board is used to detect the position of the magnet and judge whether the centrifuge covers are opened or closed. The whole machine signal gives a signal that the two centrifuge covers 2 have been closed.

[0036] For further information, see Figure 5 As shown, the fixing block 9 is semicircular, and a through hole 91 is provided in the fixing block 9 corresponding to the magnet 8. The through hole 91 is used to insert the magnet 8. The fixing block 9 also has a fixing hole 93. The screw passes through the fixing hole 93 to fix the fixing block 9 to the centrifuge cover 2. A groove 92 is provided on one side wall of the fixing block 9 corresponding to the knob assembly 1.

[0037] In this embodiment, see Figure 6 、 Figure 7 and Figure 8 As shown, the knob assembly 1 includes a knob 11, which is connected to a rotating shaft 12 by a screw. The rotating shaft 12 is fixedly connected to a Hall switch board 7. A Hall device is provided on the Hall switch board 7, which can save space and cumbersome wiring. A rotating shaft copper seat 13 is provided in the middle of the rotating shaft 12. A bracket 14 is installed at the lower end of the rotating shaft copper seat 13. A control board 16 is installed on the bracket 14. The control board 16 is a PCBA board. An optical coupler 161 is installed on the inside of the control board 16. An optical coupler 161 is welded on the control board 16. The optical coupler 161 is blocked to detect the state of the knob 11. A support block 141 is provided on the bracket 14, and the support block 141 is provided with a through hole. An elastic structure 15 is installed between the rotating shaft 12 and the support block 141. When the rotating shaft 12 moves downward, the elastic structure 15 can be squeezed to deform. Furthermore, a locking sleeve 17 is provided at the bottom of the knob 11, and a groove is provided at the bottom of the knob 11 corresponding to the locking sleeve 17. The locking sleeve 17 is sleeved on the outside of the rotating shaft 12.

[0038] It should be noted that, in the embodiment, the elastic structure 15 includes but is not limited to a spring and a rubber sleeve.

[0039] For further information, see Figure 9As shown, the rotating shaft 12 includes a central shaft 121, and a threaded hole 125 is provided at the upper end of the central shaft 121. The threaded hole 125 is used to connect a screw to fix the knob 11 to the central shaft 121. A boss 122 is provided at the lower part of the central shaft 121, and a connecting portion 123 is provided at the lower part of the central shaft 121. The outer diameter of the connecting portion 123 is smaller than the outer diameter of the central shaft 121, and an end face 126 is provided at the connection between the central shaft 121 and the connecting portion 123. The connecting portion 123 is used to fit the elastic structure 15, and the lower end of the connecting portion 123 is connected to a stopper 124. The stopper 124 is used to be inserted into the through hole of the support block 141. After the rotating shaft 12 is installed, the elastic structure 15 is located between the end face 126 and the support block 141. When the rotating shaft 12 moves downward, the end face 126 squeezes the elastic structure 15 downward.

[0040] For further information, see Figure 10 and Figure 11 As shown, the rotating shaft copper seat 13 includes a fixed seat 131, which is used to connect the bracket 14. A sleeve 132 is fixedly connected to the middle of the fixed seat 131. The sleeve 132 is used to insert the rotating shaft 12. The lower end surface of the sleeve 132 is provided with an inclined surface 133. The sleeve 132 is located at the lower end of the inclined surface 133 and a first groove 134 is opened. The sleeve 132 is located at the upper end of the inclined surface 133 and a second groove 135 is opened. The sleeve 132 is located at the upper end of the inclined surface 133 and retaining walls 136 are provided at both ends of the inclined surface 133.

[0041] Specifically, when the centrifuge cover 2 is closed, the knob 11 is rotated 90 degrees clockwise, and the knob 11 drives the rotating shaft 12 to rotate, and the boss 122 contacts the inclined surface 133. When the knob 11 is rotated clockwise, driving the rotating shaft 12 to rotate, the rotating shaft 12 overcomes the elastic structure 15 under the end surface 126 and moves downward. When the boss 122 rotates from the second groove 135 to the first groove 134, the rotating shaft 12 is locked. At this time, under normal working conditions, the block 124 extends into the middle of the optical coupler 161, blocking the channel of the optical coupler 161. The optical coupler 161 gives a signal that the centrifuge cover 2 is locked. When the knob 11 is automatically unlocked (accidentally triggered or vibration triggered), the rotating shaft 12 rises under the action of the elastic structure 15, and the block at the lower end of the rotating shaft 12 124 rises at the same time and disengages from the middle of the optical coupler 161. After the optical coupler 161 receives the signal, it sends it to the host. The host determines whether the motor 4 is still working normally. If the motor 4 is working normally, the two electromagnets 5 installed at the lower end of the centrifugal disk 3 are started, and the locking rod 52 connected to the electromagnet 5 is extended into the electromagnet locking hole 27 of the centrifuge cover 2 to prevent the centrifuge cover 2 from being opened. If the motor 4 stops working, the electromagnet 5 is not started, so that the centrifuge cover 2 is opened. The centrifuge cover 2 is also provided with an electromagnet locking hole 27, and the electromagnet locking hole 27 is used to insert the locking rod 52. After the electromagnet 5 is energized, the locking rod 5 extends and is inserted into the electromagnet locking hole 27 to prevent the centrifuge cover 2 from rotating. The centrifuge cover 2 can be locked, thereby improving the safety of the centrifuge.

[0042] In this embodiment, see Figure 11 and Figure 12 As shown, the centrifuge cover 2 is provided with a magnet mounting hole 21 corresponding to the magnet 8, and the centrifuge cover 2 is provided with a slot 22 corresponding to the fixing block 9. The fixing block 9 is placed in the slot 22, and the through hole 91 on the fixing block 9 is in a connected state with the magnet mounting hole 21. The magnet 8 is installed in the magnet mounting hole 21 and the through hole 91, and the fixing block 9 is fixed to the centrifuge cover 2 by inserting a screw into the fixing hole 93. A screw mounting hole 23 is provided at one end of the centrifuge cover 2 for the screw pin 6, and a locking inclined surface 2 is provided at the connection between the centrifuge cover 2 and the rotating shaft 12. 4. After the two centrifuge covers 2 are closed, the sides of the two locking bevels 24 are fitted together. When the rotating shaft 12 moves downward, the locking sleeve 17 moves downward with the knob 11, and the locking sleeve 17 is sleeved on the outside of the two locking bevels 24, fixing the positions of the two locking bevels 24, thereby fixing the positions of the two centrifuge covers 2. A mounting hole 25 is opened in the middle of the centrifuge cover 2, and an observation window 26 is installed at the mounting hole 25. The observation window 26 is fixed to the centrifuge cover 2 by screws, and the internal situation of the centrifuge cup is conveniently observed through the observation window 26.

[0043] In this embodiment, see Figure 13 The cam 33 is provided with an electric magnet positioning hole 31 corresponding to the locking rod 52, and the outer end of the locking rod 52 is located in the electric magnet positioning hole 31. The electric magnet positioning hole 31 is used to limit the locking rod 52 to prevent the locking rod 52 from deviating when moving. The mounting plane 33 is provided with an electric magnet mounting screw hole 32 on one side of the electric magnet positioning hole 31. The electric magnet mounting surface 51 fits the electric magnet mounting screw hole 32, and the screw passes through the electric magnet mounting surface 51 and is screwed into the electric magnet mounting screw hole 32 to fix the electric magnet 5 to the centrifugal disk 3. The mounting plane 33 is also provided with a shaft copper seat mounting hole 34, and the screw passes through the shaft copper seat and is screwed into the shaft copper seat mounting hole 34, which can fix the shaft copper seat 13 to the centrifugal disk 3. The centrifugal disk 3 is provided with a shaft copper seat positioning hole 35 corresponding to the shaft copper seat 13. During installation, the sleeve 132 is inserted into the shaft copper seat positioning hole 35 to facilitate the installation of the rotating copper seat 13.

[0044] In this embodiment, see Figure 14 As shown, the electromagnet 5 is fixed to the electromagnet mounting surface 51 by bolts, and the electromagnet mounting surface 51 is connected to the electromagnet mounting threaded hole 32 by bolts, and the electromagnet 5 is installed on the centrifugal disk 3. The electromagnet 5 is connected to the locking rod 52. When the electromagnet 5 is in the power-off state, the locking rod 52 is located inside the electromagnet 5. When the electromagnet 5 is in the power-on state, the locking rod 52 extends to the outside of the electromagnet 5. The locking rod 52 passes through the electromagnet positioning hole 31 and enters the electromagnet locking hole 27 to prevent the centrifuge cover 2 from rotating. The centrifuge cover 2 can be locked to improve the safety of the centrifuge.

[0045] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A centrifuge locking device, comprising a centrifugal disc (3), characterized in that: The centrifugal disc (3) is provided with a centrifuge cover (2) and a knob assembly (1), the knob assembly (1) is used to fix the centrifuge cover (2) and the centrifugal disc (3), and the centrifuge cover (2) is provided with an electromagnet locking hole (27); An electromagnet (5) is installed below the centrifugal disc (3), and the electromagnet (5) is connected to a locking rod (52). The locking rod (52) is adapted to the electromagnet locking hole (27), and the locking rod (52) is used to cooperate with the knob assembly (1) to lock the centrifuge cover (2); The knob assembly (1) includes a knob (11), the knob (11) is connected to a rotating shaft (12) via a screw, a rotating shaft copper seat (13) is sleeved on the middle of the rotating shaft (12), a bracket (14) is installed at the lower end of the rotating shaft copper seat (13), and a control board (16) is installed on the bracket (14); A support block (141) is provided on the bracket (14), and an elastic structure (15) is installed between the support block (141) and the rotating shaft (12); The rotating shaft (12) includes a central shaft (121), a boss (122) is provided at the lower portion of the central shaft (121), a connecting portion (123) is provided at the lower portion of the central shaft (121), the connecting portion (123) is used to fit the elastic structure (15), the lower end of the connecting portion (123) is connected to a stopper (124), an optical coupler (161) is provided on one side of the stopper (124), and the optical coupler (161) is mounted on the control board (16); The rotating shaft copper seat (13) includes a fixed seat (131), a sleeve (132) is fixedly connected to the middle of the fixed seat (131), the sleeve (132) is used to insert the rotating shaft (12), the lower end surface of the sleeve (132) is provided with an inclined surface (133), the sleeve (132) is provided with a first groove (134) at the lower end of the inclined surface (133), the sleeve (132) is provided with a second groove (135) at the upper end of the inclined surface (133), and the sleeve (132) is provided with retaining walls (136) at both ends of the inclined surface (133); The stopper (124) extends into or out of the middle of the optical coupler (161), and the optical coupler (161) receives a signal and sends it to the host. The host determines whether the motor (4) is working normally. If the motor (4) is working normally, the electromagnet (5) starts. If the motor (4) stops working, the electromagnet (5) does not start.

2. A centrifuge locking device according to claim 1, characterized in that: One end of the centrifuge cover (2) is mounted on the centrifugal disc (3) via a screw pin (6), and the centrifuge cover (2) is rotatably connected to the centrifugal disc (3) via the screw pin (6).

3. A centrifuge locking device according to claim 2, characterized in that: A fixing block (9) is provided at the connection between the centrifuge cover (2) and the knob assembly (1), and the fixing block (9) is used to fix the magnet (8).

4. A centrifuge locking device according to claim 3, characterized in that: A Hall switch plate (7) is installed below the centrifugal disc (3), and the Hall switch plate (7) cooperates with the magnet (8) to determine whether the centrifuge cover (2) is in a closed and locked state.

5. A centrifuge locking device according to claim 4, characterized in that: The centrifuge cover (2) is provided with a slot (22) corresponding to the fixed block (9), and the fixed block (9) is arranged in the slot (22).

6. A centrifuge locking device according to claim 1, characterized in that: The lower end of the centrifugal disc (3) is provided with a mounting plane (33), and the mounting plane (33) is provided with an electromagnet positioning hole (31) corresponding to the locking rod (52), and the electromagnetic positioning hole (31) is used for inserting the locking rod (52).

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