Door lock device and centrifugal machine

Abstract

The door lock device provided by the embodiment of the invention comprises a spring bolt, a mounting plate, a door lock hook assembly and a driving assembly, a groove is formed in the door lock hook assembly; in the locking process, the spring bolt enters the groove and presses the first end of the groove to enable the door lock hook assembly to rotate, the spring bolt is inserted into the second end of the groove, and the driving assembly fixes the door lock hook assembly and maintains the door lock hook assembly at the locking position. In the unlocking process, the driving assembly loosens the door lock hook assembly, the door lock hook assembly reaches the unlocking position after resetting, and the second end of the groove retreats from the spring bolt. The lock tongue presses the first end of the groove to enable the door lock hook assembly to rotate, the second end of the groove is inserted into the lock tongue, the driving assembly fixes the door lock hook assembly to the locking position, in the unlocking process, the driving assembly loosens the door lock hook assembly, the door lock hook assembly reaches the unlocking position after being reset, and the second end of the groove retreats from the lock tongue, so that the structure is simple and firm; in the locking process, only the spring bolt needs to be pressed down, then locking is completed through the driving assembly, and a user does not need to keep for several seconds and then loosen the hand.

Description

Technical Field

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

[0002] Centrifuges are instruments used to separate biological samples and are widely used in life sciences, medicine, chemistry, environmental protection and other fields. For safety reasons, the door of the centrifuge is not allowed to be opened when the centrifuge rotor is rotating at high speed; the door of the centrifuge cannot be easily opened when there are fragments flying inside the centrifuge cavity or a malfunction occurs.

[0003] When the existing door lock device locks the door cover, the experimenter presses the door cover and holds it for a few seconds, and can release it only after the door cover is completely locked. Otherwise, the door cover may not be locked or locked in place, causing safety problems. Summary of the invention

[0004] The embodiment of the present invention provides a door lock device, aiming to solve the problem in the prior art that whether the door lock device is completely locked depends on the experimenter and is prone to danger.

[0005] In a first aspect, a door lock device is provided, comprising: Lock tongue (1); Mounting plate (2); A door lock hook assembly (3) and a drive assembly (4) arranged on the mounting plate (2); The door lock hook assembly (3) forms a groove (1000); during the locking process, the lock tongue (1) enters the groove (1000) and presses the first end of the groove (1000) to rotate the door lock hook assembly (3), the second end of the groove (1000) is inserted into the lock tongue (1), and the drive assembly (4) fixes the door lock hook assembly (3) to maintain the door lock hook assembly (3) in the locked position; during the unlocking process, the drive assembly (4) releases the door lock hook assembly (3), the door lock hook assembly (3) resets to reach the unlocking position, and the second end of the groove (1000) exits the lock tongue (1).

[0006] In a second aspect, a centrifuge is provided, comprising a door cover (6), a cavity (7) and the door lock device described above, wherein the lock tongue (1) is fixed to the door cover (6) and the mounting plate (2) is fixed to the cavity (7).

[0007] In the embodiment of the present invention, the lock tongue presses the first end of the groove formed by the door lock hook assembly, so that the door lock hook assembly rotates, and the second end of the groove formed by the door lock hook assembly is inserted into the lock tongue, and the driving assembly further fixes the door lock hook assembly to the locked position. During the unlocking process, the driving assembly releases the door lock hook assembly, and the door lock hook assembly reaches the unlocking position after resetting, and the second end of the groove formed by the door lock hook assembly exits the lock tongue. The door lock device has a simple and sturdy structure. The locking process only requires pressing the lock tongue, and then the locking is further completed by the driving assembly. The user does not need to hold it for a few seconds before letting go. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 is a schematic diagram of a door lock device provided in Embodiment 1 of the present invention; Figure 2 is a schematic diagram of a door lock hook assembly provided in Embodiment 1 of the present invention; Figure 3 is a schematic diagram of a door lock hook assembly provided by Embodiment 1 of the present invention in State 1; Figure 4 is a schematic diagram of the door lock hook assembly provided by the first embodiment of the present invention in state two; Figure 5 is a schematic diagram of the door lock hook assembly provided by the first embodiment of the present invention in state three; Figure 6 is a schematic diagram of a locking trigger assembly provided in Embodiment 2 of the present invention; Figure 7 is a schematic diagram of a centrifuge provided in Embodiment 3 of the present invention; Figure 8 is a schematic diagram of a centrifuge heat dissipation duct provided in Embodiment 3 of the present invention; Fig. 9 It is a cross-sectional view of a centrifuge provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0009] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar modules or modules with the same or similar functions. The embodiments described below by reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limitations of the present invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0010] In the embodiment of the present invention, the lock tongue presses the first end of the groove formed by the door lock hook assembly, so that the door lock hook assembly rotates, and the second end of the groove formed by the door lock hook assembly is inserted into the lock tongue, and the driving assembly further fixes the door lock hook assembly to the locked position. During the unlocking process, the driving assembly releases the door lock hook assembly, and the door lock hook assembly reaches the unlocking position after resetting, and the second end of the groove formed by the door lock hook assembly exits the lock tongue. The door lock device has a simple and sturdy structure. The locking process only requires pressing the lock tongue, and then the locking is further completed by the driving assembly. The user does not need to hold it for a few seconds before letting go. Embodiment 1

[0011] Figure 1 Schematic diagram of a door lock device provided in Embodiment 1 of the present invention. Figure 2 Schematic diagram of a door lock hook assembly provided in Embodiment 1 of the present invention. Figure 3 Schematic diagram of the door lock hook assembly provided by the first embodiment of the present invention in state 1. Figure 1 , Figure 2 and Figure 3 The door lock device includes a lock tongue 1, a mounting plate 2, a door lock hook assembly 3 and a drive assembly 4. The mounting plate 2 includes at least a first fixing plate 21 and a second fixing plate 22 which are parallel to each other, and the first fixing plate 21 and the second fixing plate 22 are fixedly connected by a positioning shaft and screws. The door lock hook assembly 3 and the drive assembly 4 are arranged on the mounting plate 2. In the embodiment of the present invention, the door lock hook assembly 3 and the drive assembly 4 are arranged in the space between the first fixing plate 21 and the second fixing plate 22.

[0012] The door lock hook assembly 3 is formed with a groove 1000 . Figure 3 The schematic diagram of the door lock hook assembly 3 in state 1 after the first fixing plate 21 is hidden. In state 1, the opening of the groove 1000 is tilted upward, the lock tongue 1 can freely drop or rise, and the door lock hook assembly 3 is in the unlocked position. During the locking process, the lock tongue 1 enters the groove 1000 and presses the first end of the groove 1000 to rotate the door lock hook assembly 3, and at the same time, the second end of the groove 1000 is inserted into the lock tongue 1. At this time, the driving assembly 4 is started to further fix the door lock hook assembly 3 and maintain the door lock hook assembly 3 in the locked position. During the unlocking process, the driving assembly 4 releases the door lock hook assembly 3, and the door lock hook assembly 3 reaches the unlocked position after resetting, and the second end of the groove 1000 exits the lock tongue 1.

[0013] As an embodiment of the present invention, the door lock hook assembly 3 includes a ratchet assembly 31 and a pawl assembly 32. The ratchet assembly 31 is formed with a groove 1000 and a tooth groove 2000, and the pawl assembly 32 and the ratchet assembly 31 can be engaged at the tooth groove 2000. The state is the same as described above.

[0014] Figure 4 It is a schematic diagram of the door lock hook assembly provided in the first embodiment of the present invention in the second state. Figure 5FIG. 1 is a schematic diagram of the door lock hook assembly provided in the first embodiment of the present invention in state three. Figure 4 and Figure 5 As shown, Figure 4 The schematic diagram shows that the rear door lock hook assembly 3 is in state 2 after the first fixing plate 21 is hidden. Figure 5 The schematic diagram of the door lock hook assembly 3 in state three is to hide the first fixing plate 21. During the locking process, the lock tongue 1 enters the groove 1000 and presses the first end of the groove 1000 to rotate the ratchet assembly 31 in a preset direction, such as counterclockwise, and the second end of the groove 1000 is inserted into the lock tongue 1; at the same time, after the ratchet assembly 31 forces the pawl assembly 32 to rotate, the pawl assembly 32 is inserted into the tooth groove 2000 of the ratchet assembly 31 to prevent the ratchet assembly 31 from rotating in the opposite direction. That is, in state two, the second end of the groove 1000 is inserted into the lock tongue 1, and the pawl assembly 32 is engaged with the ratchet assembly 31 at the tooth groove 2000 to prevent the ratchet assembly 31 from rotating clockwise. Then the driving assembly 4 is started to further drive the ratchet assembly 31 to continue to rotate in the preset direction to the locking position, and maintain the ratchet assembly 31 in the locking position. That is, in state three, the ratchet assembly 31 continues to rotate counterclockwise by a certain angle relative to state two, the pawl assembly 32 withdraws from the tooth groove 2000, abuts against the tooth surface of the ratchet assembly 31, and the second end of the groove 1000 is inserted into the lock tongue 1 more than in state two, and at this time the position of the ratchet assembly 31 is fixed by the drive assembly 4, which is in a fully locked state.

[0015] The embodiment of the present invention divides the locking process into two states, state 2 and state 3. After the user presses the lock tongue 1 to make the door lock hook assembly 3 reach state 2, the user releases the lock, and the door lock hook assembly 3 will not rotate in the opposite direction to the unlocking position; then the driving assembly 4 further completes the locking and fixing, and the structure of the door lock device is simple and strong.

[0016] During the unlocking process, the driving assembly 4 releases the ratchet assembly 31, and the ratchet assembly 32 rotates in the opposite direction, that is, clockwise, and the second end of the groove 1000 begins to withdraw from the lock tongue 1. As an embodiment of the present invention, the driving assembly 4 controls the pawl assembly 32 while releasing the ratchet assembly 31, so that it does not prevent the ratchet assembly 31 from moving in the opposite direction; finally, the driving assembly 4 releases the pawl assembly 32, so that the ratchet assembly 31 and the pawl assembly 32 are reset to reach the unlocking position, the second end of the groove 1000 completely withdraws from the lock tongue 1, and the door lock hook assembly 3 returns from state three to state one. As another embodiment of the present invention, the ratchet assembly 32 rotates in the opposite direction, the pawl assembly 32 engages with the ratchet assembly 31 at the tooth groove 2000, and the door lock hook assembly 3 returns from state three to state two; then the driving assembly 4 controls the pawl assembly 32 to withdraw from the tooth groove 2000, and no longer prevents the ratchet assembly 31 from rotating in the opposite direction; finally, the driving assembly 4 releases the pawl assembly 32, so that the ratchet assembly 31 and the pawl assembly 32 are reset to the unlocked position, the second end of the groove 1000 completely withdraws from the lock tongue 1, and the door lock hook assembly 3 returns from state two to state one.

[0017] In the unlocking process of the embodiment of the present invention, by controlling the action of the driving component 4 on the ratchet component 31 and the pawl component 32, the process of the groove 1000 exiting the lock tongue 1 can be continuous, that is, the user feels that the process of the lock tongue 1 rising is continuous during the unlocking process, which is more in line with the user's habit of opening the cover; by adjusting the action of the driving component 4 on the ratchet component 31 and the pawl component 32, the speed of the rising process of the lock tongue 1 can be adjusted to adapt to the user's feelings.

[0018] In the embodiment of the present invention, the lock tongue presses the first end of the groove formed by the door lock hook assembly, so that the door lock hook assembly rotates, and the second end of the groove formed by the door lock hook assembly is inserted into the lock tongue, and the driving assembly further fixes the door lock hook assembly to the locked position. During the unlocking process, the driving assembly releases the door lock hook assembly, and the door lock hook assembly reaches the unlocking position after resetting, and the second end of the groove formed by the door lock hook assembly exits the lock tongue. The door lock device has a simple and sturdy structure. The locking process only requires pressing the lock tongue, and then the locking is further completed by the driving assembly. The user does not need to hold it for a few seconds before letting go. Embodiment 2

[0019] In the embodiment of the present invention, the basic structure of the door lock device is the same as that of the first embodiment, and the same components as the first embodiment use the same reference numerals as the first embodiment, including all the features described in the first embodiment, which will not be repeated here.

[0020] like Figures 1 to 5As shown, in the embodiment of the present invention, the ratchet assembly 31 includes a ratchet 311, a door lock hook 312 and a first elastic member 313. The ratchet 311 and the door lock hook 312 are fixedly connected and form a groove 1000, the ratchet 311 is the first end of the groove 1000, and the door lock hook 312 is the second end of the groove 1000. The pawl assembly 32 includes a pawl 321 and a second elastic member 322. The first elastic member 313 and the second elastic member 322 are torsion springs or springs. The first end of the first elastic member 313 is connected to the ratchet 311, and the second end of the first elastic member 313 is connected to the mounting plate 2. The ratchet 311 and the door lock hook 312 are kept in the unlocked position under the action of the first elastic member 313. The first end of the second elastic member 322 is connected to the pawl 321, and the second end of the second elastic member 322 is connected to the mounting plate 2. The pawl 321 is kept in the unlocked position under the action of the second elastic member 322.

[0021] In the embodiment of the present invention, the ratchet assembly 31 further includes a first shaft 314, and the pawl assembly 32 further includes a second shaft 323. The first shaft 314 and the second shaft 323 are respectively fixedly arranged on the mounting plate 2, the first elastic member 313 is sleeved on the first shaft 314, and the second elastic member 322 is sleeved on the second shaft 323. During the locking and unlocking process, the ratchet 311 and the door lock hook 312 overcome the force of the first elastic member 313 and rotate around the first shaft 314, and the pawl 321 overcomes the force of the second elastic member 322 and rotates around the second shaft 323. When the external force is removed, the ratchet 311 and the door lock hook 312 rotate and reset to the unlocked position under the action of the first elastic member 313, and the pawl 321 rotates and resets to the unlocked position under the action of the second elastic member 322. By adjusting the elastic coefficients of the first elastic member 313 and the second elastic member 322, the force required for the user to press the lock tongue 1 to make the door lock hook assembly 3 reach the second state can be adjusted.

[0022] In the embodiment of the present invention, the ratchet assembly 31 further includes a first pin 315 fixedly connected to the ratchet 311, and the pawl assembly 32 further includes a second pin 324 fixedly connected to the pawl 321. The mounting plate 2 is provided with a first limiting groove 23 and a second limiting groove 24, such as a first limiting groove 23 and a second limiting groove 24 are provided on the first fixing plate 21. The first pin 315 is inserted into the first limiting groove 23 to limit the rotation angle of the ratchet 311, and the second pin 324 is inserted into the second limiting groove 24 to limit the rotation angle of the pawl 321.

[0023] In order to detect the state of the door lock hook assembly 3 and control the driving assembly 4, as an embodiment of the present invention, the ratchet assembly 31 includes a first micro switch 316. The door lock device also includes a locking trigger assembly 5 disposed on the mounting plate 2. Figure 6 Schematic diagram of the locking trigger assembly provided in the second embodiment of the present invention. Figure 6As shown, the locking trigger assembly 5 is arranged outside the second fixing plate 22. The locking trigger assembly 5 includes a trigger plate 51 and a second micro switch 52. The trigger plate 51 can be kept in a preset position under the action of elastic force, and rotate and trigger the second micro switch 52 under the action of external force.

[0024] During the locking process, when the ratchet 311 and the door lock hook 312 leave the unlocking position, the first micro switch 316 sends a signal to the driving assembly 4, so that the driving assembly 4 further fixes the ratchet 311 and the door lock hook 312 to the locking position within a preset time. When the door lock hook assembly 3 enters the state 3 from the second state, the lock tongue 1 descends to contact the trigger plate 51 and causes it to rotate to trigger the second micro switch 52, and the second micro switch 52 sends a signal to the driving assembly 4, so that the driving assembly 4 maintains the ratchet 311 and the door lock hook 312 in the locking position. During the unlocking process, the driving component 4 releases the ratchet component 31 and controls the pawl component 32 after receiving the cover opening signal. The ratchet component 31 resets and reaches the unlocking position, and the first micro switch 316 sends a signal to the driving component 4 to make the driving component 4 release the pawl component 32 to reset it; or, the driving component 4 releases the ratchet component 31 after receiving the cover opening signal, the lock tongue 1 rises and leaves the trigger plate 51, and the second micro switch 52 sends a signal to the driving component 4 to control the pawl component 32. The ratchet component 31 resets and reaches the unlocking position, and the first micro switch 316 sends a signal to the driving component 4 to make the driving component 4 release the pawl component 32 to reset it.

[0025] The driving assembly 4 includes a combination of components such as a motor, a gear, a rack or a belt, which is not limited here.

[0026] In the embodiment of the present invention, the lock tongue presses the first end of the groove formed by the door lock hook assembly, so that the door lock hook assembly rotates, and the second end of the groove formed by the door lock hook assembly is inserted into the lock tongue, and the driving assembly further fixes the door lock hook assembly to the locked position. During the unlocking process, the driving assembly releases the door lock hook assembly, and the door lock hook assembly reaches the unlocking position after resetting, and the second end of the groove formed by the door lock hook assembly exits the lock tongue. The door lock device has a simple and sturdy structure. The locking process only requires pressing the lock tongue, and then the locking is further completed by the driving assembly. The user does not need to hold it for a few seconds before letting go. Embodiment 3

[0027] In the embodiment of the present invention, the basic structure of the door lock device is the same as that of Embodiment 1 or Embodiment 2, and the components that are the same as those of Embodiment 1 or Embodiment 2 use the same labels as those of Embodiment 1 and Embodiment 2, including all the features described in Embodiment 1 and Embodiment 2, which will not be repeated here.

[0028] In the embodiment of the present invention, the centrifuge includes a door cover 6, a cavity 7 and a door locking device. Figure 7 Schematic diagram of a centrifuge provided in Embodiment 3 of the present invention. Figure 7 As shown, the lock tongue 1 is fixed to the door cover 6, and the mounting plate 2 is fixed to the cavity 7. When the door cover 6 is closed toward the cavity 7, the lock tongue 1 and the mounting plate 2 are in corresponding positions, and perform the locking or unlocking process together with other components of the door lock device.

[0029] Figure 8 It is a schematic diagram of the heat dissipation duct of the centrifuge provided in the third embodiment of the present invention. Fig. 9 is a cross-sectional view of a centrifuge provided in Embodiment 3 of the present invention. Figure 7 , Figure 8 and Fig. 9 As shown, the door cover 6 can pivot relative to the cavity 7 around an axis. The door cover 6 and the cavity 7 form an enclosed space, and the components such as the rotor 8, the motor 9, the centrifugal chamber 10 and the cooling fan 11 are contained in the enclosed space. The lock tongue 1 is fixed to the middle of the front end of the door cover 6, and the mounting plate 2 is fixed to the middle of the front end of the cavity 7 by screws on its top surface. When the door cover 6 is closed, the lock tongue 1 and the mounting plate 2 correspond. The motor 9 includes a driving part and a driving shaft part. One end of the motor 9 is fixed to the bottom of the cavity 7, and the other end of the motor 9 passes through the bottom of the centrifugal chamber 10. When the rotor 8 is loaded on the motor 9, it is located in the centrifugal chamber 10. The cooling fan 11 is arranged between the centrifugal chamber 10 and the rear panel of the cavity 7, and ventilation holes 71 are respectively provided at the rear ends of the left and right side panels of the cavity 7, and the ventilation holes 71 are arranged relative to the cooling fan 11. Under the action of the cooling fan 11, the wind outside the centrifuge enters from the ventilation holes 71 on one side of the cavity 7 and is discharged from the ventilation holes 71 on the other side.

[0030] As an embodiment of the present invention, an air inlet is provided at the rear end of the door cover 6, and an air outlet is provided around the bottom of the cavity 7 supporting the motor 9 to form a heat dissipation duct. Figure 8 As shown, air at room temperature enters from the air inlet of the door cover 6 and is guided to the top of the rotor 8. When the motor 9 drives the rotor 8 to rotate at high speed, the air around the rotor 8 rises, and the air flows out from the surrounding of the centrifugal chamber 10, and then passes downward through the motor 9 and is discharged from the air outlet of the cavity 7, thereby completing the heat dissipation of the rotor 8 and the motor 9. Figure 8 The arrows in the figure show the direction of wind flow.

[0031] In order to improve the heat dissipation efficiency of the rotor 8 and the motor 9, as another embodiment of the present invention, the air inlet and the air outlet are blocked, and a refrigeration system (not shown in the figure) is set in the cavity 7 to cool the rotor 8, the motor 9 and the centrifugal chamber 10. The ventilation hole 71 completes the heat dissipation of the refrigeration system.

[0032] In the embodiment of the present invention, the lock tongue presses the first end of the groove formed by the door lock hook assembly, so that the door lock hook assembly rotates, and the second end of the groove formed by the door lock hook assembly is inserted into the lock tongue, and the driving assembly further fixes the door lock hook assembly to the locked position. During the unlocking process, the driving assembly releases the door lock hook assembly, and the door lock hook assembly reaches the unlocking position after resetting, and the second end of the groove formed by the door lock hook assembly exits the lock tongue. The door lock device has a simple and sturdy structure. The locking process only requires pressing the lock tongue, and then the locking is further completed by the driving assembly. The user does not need to hold it for a few seconds before letting go.

[0033] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A door lock device, characterized in that: include: Lock tongue (1); Mounting plate (2); A door lock hook assembly (3) and a drive assembly (4) arranged on the mounting plate (2); The door lock hook assembly (3) forms a groove (1000); during the locking process, the lock tongue (1) enters the groove (1000) and presses the first end of the groove (1000) to rotate the door lock hook assembly (3), the second end of the groove (1000) is inserted into the lock tongue (1), and the drive assembly (4) fixes the door lock hook assembly (3) to maintain the door lock hook assembly (3) in the locked position; during the unlocking process, the drive assembly (4) releases the door lock hook assembly (3), the door lock hook assembly (3) is reset to reach the unlocking position, and the second end of the groove (1000) exits the lock tongue (1).

2. The door lock device according to claim 1, characterized in that: The door lock hook assembly (3) comprises a ratchet assembly (31) and a pawl assembly (32), wherein the ratchet assembly (31) forms the groove (1000); During the locking process, the locking tongue (1) enters the groove (1000) and presses the first end of the groove (1000) to rotate the ratchet assembly (31), the second end of the groove (1000) is inserted into the locking tongue (1), the pawl assembly (32) is inserted into the tooth groove (2000) of the ratchet assembly (31), and the driving assembly (4) drives the ratchet assembly (31) to rotate to a locking position and maintains the ratchet assembly (31) in the locking position; During the unlocking process, the driving assembly (4) releases the ratchet assembly (31) and controls the pawl assembly (32), so that the ratchet assembly (31) and the pawl assembly (32) are reset to reach the unlocking position, and the second end of the groove (1000) exits the lock tongue (1).

3. The door lock device according to claim 2, characterized in that: The ratchet assembly (31) comprises a ratchet (311), a door lock hook (312) and a first elastic member (313); The ratchet (311) and the door lock hook (312) are fixedly connected to form the groove (1000), the ratchet (311) being the first end of the groove (1000), and the door lock hook (312) being the second end of the groove (1000); The ratchet (311) and the door lock hook (312) are maintained in an unlocked position under the action of the first elastic member (313).

4. The door lock device according to claim 3, characterized in that: The ratchet assembly (31) comprises a first shaft (314), the first shaft (314) being fixedly arranged on the mounting plate (2); the ratchet (311) and the door lock hook (312) rotate around the first shaft (314).

5. The door lock device according to claim 3, characterized in that: The ratchet assembly (31) comprises a first pin (315) fixedly connected to the ratchet (311), and a first limiting groove (23) is provided on the mounting plate (2); the first pin (315) is inserted into the first limiting groove (23) to limit the rotation angle of the ratchet (311).

6. The door lock device according to claim 3, characterized in that: The ratchet assembly (31) comprises a first micro switch (316); when the ratchet (311) and the door lock hook (312) leave the unlocking position, the first micro switch (316) sends a signal to the drive assembly (4).

7. The door lock device according to any one of claims 2 to 6, characterized in that: The pawl assembly (32) comprises a pawl (321) and a second elastic member (322); the pawl (321) is maintained in an unlocked position under the action of the second elastic member (322).

8. The door lock device according to claim 7, characterized in that: The pawl assembly (32) comprises a second shaft (323), the second shaft (323) being fixedly arranged on the mounting plate (2); the pawl (321) rotates around the second shaft (323).

9. The door lock device according to claim 7, characterized in that: The pawl assembly (32) comprises a second pin (324) fixedly connected to the pawl (321), and a second limiting groove (24) is provided on the mounting plate (2); the second pin (324) is inserted into the second limiting groove (24) to limit the rotation angle of the pawl (321).

10. A centrifuge, characterized in that: The centrifuge comprises a door cover (6), a cavity (7) and a door lock device according to any one of claims 1 to 9, wherein the lock tongue (1) is fixed to the door cover (6), and the mounting plate (2) is fixed to the cavity (7).

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