A double linkage self-locking safety door lock mechanism

Abstract

The invention discloses a double linkage self-locking safety door lock mechanism, comprising a lock assembly fixed on a housing and a lock catch fixed on a door cover; the lock assembly comprises a front lock frame and a rear lock frame arranged relatively, an axle pin, a latch pin, a lock tongue top plate, a lock tongue, a lock torsion spring, a transmission rod and a cam are located between the front lock frame and the rear lock frame, the front lock frame and the rear lock frame are assembled to form a hole position matching the lock catch, and the hole position is provided with a lock tongue matching the lock catch, the lock tongue matches the lock tongue top plate, the axle pin passes through the axle pin hole on the lock tongue and the lock tongue top plate to fix the lock tongue and the lock tongue top plate, the axle pin is sleeved with a lock torsion spring, a transmission rod is fixed between the front lock frame and the rear lock frame, a cam is sleeved on the transmission rod and the cam matches the lock tongue top plate; the two ends of the transmission rod are respectively connected to the output shaft of the motor and the manual adjustment seat. The double linkage self-locking safety door lock mechanism of the invention has a simple structure and a reasonable design, and is operated by mechanical drive when the motor cannot work normally, so it is easy to operate and has great application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of door locks, in particular to a double-linked self-locking safety door lock mechanism, and in particular to a durable and efficient double-linked self-locking safety door lock mechanism suitable for a large centrifuge. Background Art

[0002] The centrifuge door lock is an important part of the centrifuge. When the centrifuge is working, it must be sealed and closed to ensure safety. However, the current centrifuge door lock structure is relatively simple. The door is opened by pressing a button, and then the door needs to be pulled up manually. From a safety perspective, the door cover of the centrifuge cannot be opened when the centrifuge rotor is rotating at high speed (centrifugal operation). In the case of debris splashing or malfunction inside the centrifuge cavity, the door cover cannot be easily opened. Because centrifugal operation is a common operation in the laboratory, the process of locking and unlocking the door cover is relatively cumbersome, which greatly affects the convenience of using the centrifuge door lock.

[0003] At present, most large centrifuges use solenoid valves to lock and unlock the door cover. However, since most large centrifuges only have one locking point in the front middle of the cover, long-term use may cause the centrifuge door cover to be unsealed due to only one locking point; the centrifuge door lock cannot automatically pop open when unlocking. If it is locked during operation and encounters special circumstances such as power outages, it is difficult to open the door.

[0004] Therefore, it is of great practical significance to develop a centrifuge door lock mechanism which has a simple structure, can be automatically opened when unlocked, has good sealing performance, and can conveniently open the cover door in special circumstances. Summary of the invention

[0005] Due to the above defects in the prior art, the present invention provides a centrifuge door lock mechanism with a simple structure, automatic pop-up when unlocked, good sealing performance, and convenient door opening under special circumstances, namely, a double-linkage self-locking safety door lock mechanism for a large centrifuge, so as to solve the problems that the current centrifuge door lock mechanism cannot automatically pop-up when unlocked, has poor sealing performance, a complex structure (poor durability), and cannot immediately open the door under special circumstances such as power outages.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A double-linked self-locking safety door lock mechanism comprises a lock assembly fixed on a housing and a lock catch fixed on a door cover;

[0008] The lock assembly comprises a front lock frame, a rear lock frame, an axle pin, a latch pin, a lock tongue top plate, a lock tongue, a first lock torsion spring, a second lock torsion spring, a transmission rod and a cam. The axle pin, the latch pin, the lock tongue top plate, the lock tongue, the first lock torsion spring, the second lock torsion spring, the transmission rod and the cam are arranged between the front lock frame and the rear lock frame which are arranged relatively. After the front lock frame and the rear lock frame are assembled, a hole position matching the lock buckle is formed, and a lock tongue matching the lock buckle is provided at the hole position. The lock tongue matches the lock tongue top plate, and an axle pin hole matching the axle pin is opened on the lock tongue and the lock tongue top plate. The axle pin passes through the axle pin hole on the lock tongue and the lock tongue top plate to lock the lock tongue and The lock tongue top plate is fixed between the front lock frame and the rear lock frame, the lock tongue and the lock tongue top plate can rotate around the shaft pin, and the shaft pins fixed on the lock tongue and the lock tongue top plate are respectively provided with a first lock torsion spring and a second lock torsion spring, a latch pin and a transmission rod are also fixed between the front lock frame and the rear lock frame, one end of the first lock torsion spring is fixedly connected to the lock tongue, and the other end is pressed on the latch pin, and the two ends of the second lock torsion spring are respectively fixed on the lock tongue top plate and the rear lock frame, a cam is provided on the transmission rod and the cam matches the lock tongue top plate, the rotation of the cam drives the lock tongue top plate to rotate, and the lock tongue rotates to loosen or lock the lock buckle under the drive of the lock tongue top plate;

[0009] One end of the transmission rod is coaxially connected to the output shaft of the motor, and the other end is coaxially connected to the manual adjustment seat. The manual adjustment piece is fixed to the manual adjustment seat. The cam can be rotated by rotating the manual adjustment piece or controlling the motor to complete the control of the double-linkage self-locking safety door lock mechanism.

[0010] When mechanical parts are used to open the door, the manual adjustment part is inserted into the manual adjustment seat. The manual adjustment part rotates, driving the second connecting rod to rotate so that the highest position of the cam is against the top plate of the lock tongue. The top plate of the lock tongue rotates, and the lock tongue moves upward under the action of the first lock torsion spring to open the lock.

[0011] When the electric component is used to open the door, the driving motor makes the cam top position against the lock tongue top plate, and the lock tongue top plate rotates. The lock tongue moves upward under the action of the first lock torsion spring to open the lock catch. Then the motor rotates the lock tongue top plate and the cam to reset it.

[0012] When the door is closed, press the door cover directly (the lock buckle is fixed on the door cover) so that the lock buckle presses down the lock tongue under pressure and pushes the lock tongue top plate at the same time. When the lock tongue moves to the ideal locking position, the lock tongue top plate is reset to the door cover under the tension of the second lock torsion spring, and the door cover is closed.

[0013] The double-linked self-locking safety door lock mechanism of the present invention has a reasonable and relatively simple structural design. It organically combines the motor drive and mechanical drive modes to drive the gear to rotate so that the lock tongue exits the door lock slot. The structure of the door lock device is strong and durable. When the motor cannot work normally, the manual adjustment seat can be rotated by mechanical drive to realize the lock buckle exiting the door lock slot (that is, the hole position matching the lock buckle). The operation is simple and convenient, and has great application prospects.

[0014] As the preferred technical solution:

[0015] In the double-linked self-locking safety door lock mechanism as described above, the rear lock frame is fixedly connected to the lock fixing support plate, and the lock assembly is fixed in the to-be-fixed position by the lock fixing support plate.

[0016] In the double-linked self-locking safety door lock mechanism as described above, the front lock frame and the rear lock frame are fixedly connected by bolts.

[0017] A double-linked self-locking safety door lock mechanism as described above, wherein the lock components have two groups and the two groups of lock components are symmetrically arranged;

[0018] The transmission rods of the two lock assemblies are connected by a first connecting rod and the two transmission rods are coaxial with the first connecting rod;

[0019] The rear lock frame of the lock assembly is located inside the two lock assembly groups. The two lock assembly groups match the two lock buckles, which can improve the locking safety of the double linkage self-locking safety door lock mechanism.

[0020] In the double-linked self-locking safety door lock mechanism as described above, the motor and the manual adjustment seat are respectively located on the outside of the two sets of lock components;

[0021] The first connecting rod is connected to the transmission rod through a connecting rod sleeve.

[0022] In the double-linked self-locking safety door lock mechanism as described above, there are two connecting rod sleeves in total and the two connecting rod sleeves are symmetrically arranged on both sides of the first connecting rod.

[0023] In the double-linked self-locking safety door lock mechanism as described above, the manual adjustment seat is connected to the transmission rod through the second connecting rod; the manual adjustment seat is a hexagonal seat; and the manual adjustment piece is an Allen wrench matching the hexagonal seat.

[0024] In the double-linked self-locking safety door lock mechanism as described above, the second connecting rod is connected to the transmission rod through a connecting rod support plate.

[0025] In the double-linked self-locking safety door lock mechanism as described above, the connecting rod support plate is respectively connected with the second connecting rod and the transmission rod by bolts;

[0026] The connecting rod sleeve is respectively connected with the first connecting rod and the transmission rod by bolts.

[0027] In the double-linked self-locking safety door lock mechanism as described above, a first micro switch is installed at the cam position connected to the motor; and a second micro switch is installed at the lock tongue position;

[0028] The first micro switch and the second micro switch are electrically connected to the door lock control unit respectively, and the state of the door lock can be obtained through the door lock control unit.

[0029] The above technical solution is only a feasible technical solution of the present invention, and the protection scope of the present invention is not limited thereto. Those skilled in the art can reasonably adjust the specific design according to actual needs.

[0030] The above invention has the following advantages or beneficial effects:

[0031] The double-linked self-locking safety door lock mechanism of the present invention has a reasonable and relatively simple structural design. It organically combines the motor drive and mechanical drive modes to drive the gear to rotate so that the lock tongue exits the door lock slot. The structure of the door lock device is strong and durable. When the motor cannot work normally, the manual adjustment seat can be rotated by mechanical drive to realize the lock buckle exiting the door lock slot (that is, the hole position matching the lock buckle). The operation is simple and convenient, and has great application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and emphasis is placed on illustrating the subject matter of the present invention.

[0033] Figure 1 is a partial schematic diagram of a centrifuge;

[0034] Figure 2 Schematic diagram of the double linkage self-locking safety door lock mechanism of Example 1;

[0035] Figure 3 It is a partial schematic diagram of a double-linked self-locking safety door lock mechanism in an unlocked state;

[0036] Figure 4 It is a partial schematic diagram of a double-linked self-locking safety door lock mechanism in a locked state;

[0037] Figure 5 It is an exploded view of the double linkage self-locking safety door lock mechanism;

[0038] Figure 6 It is a schematic diagram of a micro switch assembly in a double-linked self-locking safety door lock mechanism;

[0039] Among them, 1-shell, 2-door cover, 3-first micro switch, 4-second micro switch, 5-motor, 6-front lock frame, 7-rear lock frame, 8-lock fixing support plate, 9-cam, 10-transmission rod, 11-lock tongue top plate, 12-lock tongue, 13-axle pin, 14-latch pin, 15-first lock torsion spring, 16-second lock torsion spring, 17-lock buckle, 18-connecting rod sleeve, 19-first connecting rod, 20-connecting rod support plate, 21-second connecting rod, 22-manual adjustment seat. DETAILED DESCRIPTION

[0040] The structure of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0041] Example 1

[0042] A centrifuge double linkage self-locking safety door lock mechanism, such as Figures 1 to 5 As shown, it includes two sets of lock components fixed on the housing 1 and a lock catch 17 fixed on the door cover 2;

[0043] The lock assembly includes a front lock frame 6, a rear lock frame 7, an axle pin 13, a latch pin 14, a lock tongue top plate 11, a lock tongue 12, a first lock torsion spring 15, a second lock torsion spring 16, a transmission rod 10 and a cam 9. The axle pin 13, the latch pin 14, the lock tongue top plate 11, the lock tongue 12, the first lock torsion spring 15, the second lock torsion spring 16, the transmission rod 10 and the cam 9 are all arranged between the front lock frame 6 and the rear lock frame 7 which are arranged relatively (the front lock frame 6 and the rear lock frame 7 are fixedly connected by bolts, and the rear lock frame 7 is fixedly connected to the lock fixing support plate 8, and the lock assembly is fixedly connected by bolts. The lock fixing support plate 8 is fixed in the position to be fixed), the front lock frame 6 and the rear lock frame 7 are assembled to form a hole position matching the lock buckle 17, and a lock tongue 12 matching the lock buckle 17 is provided at the hole position, the lock tongue 12 matches the lock tongue top plate 11, and the lock tongue 12 and the lock tongue top plate 11 are provided with an axle pin hole matching the axle pin 13, and the axle pin 13 passes through the axle pin hole on the lock tongue 12 and the lock tongue top plate 11 to fix the lock tongue 12 and the lock tongue top plate 11 between the front lock frame 6 and the rear lock frame 7, and the axle pin 13 fixed on the lock tongue 12 and the lock tongue top plate 11 is also divided into A first lock torsion spring 15 and a second lock torsion spring 16 are separately provided, and a latch 14 and a transmission rod 10 are also fixed between the front lock frame 6 and the rear lock frame 7. One end of the first lock torsion spring 15 is fixedly connected to the lock tongue 12, and the other end is pressed against the latch 14. The two ends of the second lock torsion spring 16 are respectively fixed on the lock tongue top plate 11 and the rear lock frame 7. A cam 9 is provided on the transmission rod 10, and the cam 9 matches the lock tongue top plate 11. The rotation of the cam 9 drives the lock tongue top plate 11 to rotate, and the lock tongue 12 rotates to loosen or lock the lock buckle under the drive of the lock tongue top plate 11. 17 (when opening the door, the second connecting rod 21 or the motor 5 is driven to rotate so that the cam 9 is at the highest position against the lock tongue top plate 11, the lock tongue top plate 11 rotates, and the lock tongue 12 moves upward under the action of the first lock torsion spring 15 to open the lock catch 17. When the door is closed, the door cover is directly pressed down so that the lock catch 17 presses the lock tongue 12 downward under the pressure and pushes the lock tongue top plate 11 at the same time. When the lock tongue 12 moves to the ideal locking position, the lock tongue top plate 11 is reset under the tension of the second lock torsion spring 16 to close the door cover 2);

[0044] There are two lock assemblies in total and the two lock assemblies are arranged symmetrically. The transmission rods of the two lock assemblies are connected through the first connecting rod 19 (the first connecting rod 19 is connected to the transmission rod 10 through the connecting rod sleeve 18. There are two connecting rod sleeves 18 in total and the two connecting rod sleeves 18 are symmetrically arranged on both sides of the first connecting rod 19. The connecting rod sleeves 18 are respectively bolted to the first connecting rod 19 and the transmission rod 10) and the two transmission rods 10 are coaxial with the first connecting rod 19. The rear lock frame 7 of the lock assembly is located on the inner side of the two lock assemblies. The motor 5 and the manual adjustment seat 22 (hexagonal seat) are respectively located on the outside of the two lock assemblies, the manual adjustment seat 22 is connected to the transmission rod 10 through the second connecting rod 21 (the second connecting rod 21 and the transmission rod 10 are connected through the connecting rod support plate 20, and the connecting rod support plate 20 is bolted to the second connecting rod 21 and the transmission rod 10 respectively), and the manual adjustment piece (the hexagonal wrench matched with the hexagonal seat) is fixed to the manual adjustment seat 22, and the cam 6 can be rotated by rotating the manual adjustment piece or controlling the motor 5 to complete the control of the double linkage self-locking safety door lock mechanism;

[0045] Micro switch components such as Figure 6 As shown, a first micro switch 3 is installed at the cam position connected to the motor, and a second micro switch 4 is installed at the lock tongue position. The first micro switch 3 and the second micro switch 4 are electrically connected to the door lock control unit respectively;

[0046] When the door cover 2 is open, the lock tongue 12 is in the upward open state, and the second micro switch 4 sends a command to indicate the door is open; when the door cover 2 is closed, the lock buckle 17 is pressed down and contacts the lock tongue 12, and the lock tongue 12 buckles the lock buckle 17 in the closed state, and the second micro switch 4 is pressed down, and then the second micro switch 4 sends a command to indicate the closed state. The first micro switch 3 is always in the pressed state, and when the door cover is mechanically driven to open, the cam 9 will rotate to an easy angle; when the motor is used to unlock, the first micro switch 3 will automatically recognize and rotate to reset to the pressed state of the first micro switch 3.

[0047] It has been verified that the double-linked self-locking safety door lock mechanism of the present invention has a reasonable and relatively simple structural design. It organically combines the motor drive and mechanical drive modes to drive the gear to rotate so that the lock tongue exits the door lock slot. The structure of the door lock device is strong and durable. When the motor cannot work normally, the manual adjustment seat can be rotated by mechanical drive to realize the lock buckle exiting the door lock slot (that is, the hole position matching the lock buckle). The operation is simple and convenient, and has great application prospects.

[0048] Those skilled in the art should understand that those skilled in the art can implement variations by combining the prior art and the above embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present invention, and will not be described in detail here.

[0049] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A double linkage self-locking safety door lock mechanism, characterized in that: It includes a lock assembly fixed on the housing and a lock catch fixed on the door cover; The lock assembly includes a front lock frame, a rear lock frame, an axle pin, a latch pin, a lock tongue top plate, a lock tongue, a first lock torsion spring, a second lock torsion spring, a transmission rod and a cam. The axle pin, the latch pin, the lock tongue top plate, the lock tongue, the first lock torsion spring, the second lock torsion spring, the transmission rod and the cam are arranged between the front lock frame and the rear lock frame which are arranged relatively. After the front lock frame and the rear lock frame are assembled, a hole position matching the lock buckle is formed, and a lock tongue matching the lock buckle is provided at the hole position. The lock tongue matches the lock tongue top plate, and the lock tongue and the lock tongue top plate are provided with an axle pin hole matching the axle pin. An axle pin passes through the lock tongue and the lock tongue top plate. The axle pin hole fixes the lock tongue and the lock tongue top plate between the front lock frame and the rear lock frame, and the axle pins fixed on the lock tongue and the lock tongue top plate are respectively provided with a first lock torsion spring and a second lock torsion spring, and a latch pin and a transmission rod are also fixed between the front lock frame and the rear lock frame, one end of the first lock torsion spring is fixedly connected to the lock tongue, and the other end is pressed on the latch pin, and the two ends of the second lock torsion spring are respectively fixed on the lock tongue top plate and the rear lock frame, and a cam is provided on the transmission rod and the cam matches the lock tongue top plate, and the rotation of the cam drives the lock tongue top plate to rotate, and the lock tongue rotates to loosen or lock the lock buckle under the drive of the lock tongue top plate; There are two groups of lock assemblies, and the two groups of lock assemblies are symmetrically arranged; The transmission rods of the two lock assemblies are connected by a first connecting rod and the two transmission rods are coaxial with the first connecting rod; The rear lock frame of the lock assembly is located inside the two sets of lock assemblies; The transmission rod in one group of lock assemblies is coaxially connected to the output shaft of the motor away from the first connecting rod end, and the transmission rod in the other group of lock assemblies is coaxially connected to the manual adjustment seat away from the first connecting rod end. The manual adjustment part is fixed to the manual adjustment seat. The cam can be rotated by rotating the manual adjustment part or controlling the motor to complete the control of the double-linkage self-locking safety door lock mechanism.

2. A double linkage self-locking safety door lock mechanism according to claim 1, characterized in that: The rear lock frame is fixedly connected to the lock fixing support plate, and the lock assembly is fixed at the to-be-fixed position through the lock fixing support plate.

3. A double linkage self-locking safety door lock mechanism according to claim 1, characterized in that: The front locking frame and the rear locking frame are fixedly connected by bolts.

4. A double linkage self-locking safety door lock mechanism according to claim 1, characterized in that: The motor and the manual adjustment seat are respectively located on the outsides of the two lock components; The first connecting rod is connected to the transmission rod through a connecting rod sleeve.

5. A double linkage self-locking safety door lock mechanism according to claim 4, characterized in that: There are two connecting rod sleeves in total, and the two connecting rod sleeves are symmetrically arranged on both sides of the first connecting rod.

6. A double linkage self-locking safety door lock mechanism according to claim 4, characterized in that: The manual adjustment seat is connected to the transmission rod through a second connecting rod; the manual adjustment seat is a hexagonal seat; and the manual adjustment piece is an inner hexagonal wrench matched with the hexagonal seat.

7. A double linkage self-locking safety door lock mechanism according to claim 6, characterized in that: The second connecting rod is connected to the transmission rod through a connecting rod supporting plate.

8. A double linkage self-locking safety door lock mechanism according to claim 7, characterized in that: The connecting rod support plate is respectively connected with the second connecting rod and the transmission rod by bolts; The connecting rod sleeve is respectively connected with the first connecting rod and the transmission rod by bolts.

9. A double linkage self-locking safety door lock mechanism according to claim 1, characterized in that: A first micro switch is installed at the cam position connected to the motor; a second micro switch is installed at the lock tongue position; The first micro switch and the second micro switch are electrically connected to the door lock control unit respectively.

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