CN221032015U - Novel self-locking mechanism for airtight door of sterile inspection isolator - Google Patents

Abstract

The utility model provides a novel self-locking mechanism of a closed door of a sterile inspection isolator, which comprises a first door lock mechanism arranged on a box body of the isolator and a second door lock mechanism correspondingly arranged on a movable door combination, wherein the first door lock mechanism comprises a first base and a first inductor, a locking groove is formed in one side end of the top of the first base, a first induction groove is formed in the other side end of the top of the first base, and the first inductor is arranged in the first induction groove; the second door lock mechanism comprises a second base, a lock cylinder block and a second inductor, wherein the lock cylinder block and the second inductor are adjacently arranged in a groove on the second base and are respectively and correspondingly arranged with the locking groove and the first inductor. The self-locking mechanism of the airtight door has the advantages of simple structure, convenient processing and installation, better passing of leakage rate test, convenient maintenance and wide application range, can be suitable for any sterile inspection isolator, and is convenient for improving the detection efficiency.

Description

Novel self-locking mechanism for airtight door of sterile inspection isolator

Technical Field

The utility model relates to a sterile inspection isolator, in particular to a novel self-locking mechanism of a closed door of the sterile inspection isolator.

Background

Sterile inspection isolators are an air purification product that separates operators from laboratory or production process powder or liquid products by physical barrier means, the isolator system can create a local class a environment in a low level background environment, physical isolation of products and personnel is a key factor in the biopharmaceutical industry, and the design and application of the isolator depends on the nature of the isolator use, and the internal and external pressure differences, air flows, materials of construction, environment, type, etc. of the isolator are designed according to the characteristics of use.

Depending on the use of the separator system, positive pressure separators and negative pressure separators may be generally designed; the tightness of the format isolator can be generally designed to completely seal the isolator (Isolator) and the restricted access isolation system (RABS), while the restricted access isolation system (RABS) can be further divided into an open restricted access isolation system (O-RABS) and a closed restricted access isolation system (C-RABS).

In recent years, with the development of industry and the upgrading of GMP, the aseptic inspection isolator is widely applied in the industries such as medicine, and the demand for the aseptic inspection isolator is also increasing. Accordingly, the requirements for each component mechanism of the device are high. When the current sterile inspection isolator starts to work, the whole glass door combination and the front box body of the isolator keep the same horizontal plane and are in a locking state, and the normal work can be realized after the leakage rate reaches a set value.

However, when the glass door assembly on the existing sterile inspection isolator is closed and locked, the inflatable sealing ring arranged on the outer ring of the glass door assembly is required to be inflated and sealed, if the door self-locking mechanism is not tightly closed, the requirement of the sterile inspection isolator cannot be met when the isolator box body is subjected to leakage rate test, and therefore leakage rate detection cannot be passed.

Disclosure of utility model

The utility model aims to solve the defects in the prior art, and provides the novel self-locking mechanism of the sterile inspection isolator sealing door, which has the advantages of simple structure, convenience in processing and installation and capability of better passing the leakage rate test.

The utility model adopts the following technical scheme for solving the technical problems:

The utility model provides a novel self-locking mechanism of a closed door of a sterile inspection isolator, which comprises a first door lock mechanism arranged on a box body of the isolator and a second door lock mechanism correspondingly arranged on a movable door combination, wherein the first door lock mechanism comprises a first door lock mechanism, a second door lock mechanism and a third door lock mechanism, wherein the second door lock mechanism comprises a first door lock mechanism and a second door lock mechanism, and the first door lock mechanism is arranged on the movable door combination, and the second door lock mechanism comprises a first door lock mechanism and a second door lock mechanism which is arranged on the movable door combination, wherein the first door lock mechanism comprises a second door lock:

The first door lock mechanism comprises a first base and a first inductor, wherein a locking groove is formed in one side end of the top of the first base, a first induction groove is formed in the other side end of the top of the first base, and the first inductor is arranged in the first induction groove;

The second door lock mechanism comprises a second base, a lock cylinder block and a second inductor, wherein the lock cylinder block and the second inductor are adjacently arranged in a groove on the second base and are respectively and correspondingly arranged with the locking groove and the first inductor.

Preferably, the locking groove and the top and front side of the first sensing groove are opened, a first partition plate is arranged between the locking groove and the first sensing groove, the cross section of the locking groove is triangular, and the cross section of the first sensing groove is square.

Preferably, the first door lock mechanism further comprises a first cover plate and a first screw, wherein:

The four corners of the first cover plate are respectively provided with a first mounting hole, and the inner side edge of the top end is provided with a first attaching part extending upwards;

The number of the first screws is four, and the first screws respectively penetrate through the corresponding first mounting holes to mount the first cover plate on the front part of the first base.

Preferably, the first door lock mechanism further comprises a fixed block, wherein:

The fixed block is of a U-shaped structure, and two ends of the fixed block are connected with the back of the first base and the isolator box body through screws respectively.

Preferably, the recess of second base is bottom and front side opening, and the top interval of recess is provided with first cylindric lock, hold-down spring and second cylindric lock, wherein:

the top ends of the first cylindrical pin and the second cylindrical pin are fixed at the top of the second base, and the lower end of the first cylindrical pin and the second cylindrical pin are embedded in a limiting hole at the top of the lock cylinder block;

The top end of the compression spring is fixed to the top of the second base through a countersunk screw, and the lower end of the compression spring is embedded in a spring hole in the top of the lock cylinder block.

More preferably, a second partition plate is disposed at an intermediate position of the bottom opening of the groove on the second base, where:

The second baffle is L-shaped, the transverse section of one side of the second baffle is provided with the second inductor, and the other side of the second baffle is used for accommodating the lower end of the lock cylinder block.

More preferably, the lock core piece top correspond and set up first spacing hole, second spacing hole and the spring hole, wherein:

The first limiting hole, the second limiting hole and the spring hole are respectively and movably embedded with the first cylindrical pin, the second cylindrical pin and the compression spring.

Preferably, a locking block which extends downwards and corresponds to the locking groove is arranged at one side end of the bottom of the lock cylinder block, and a manual shifting groove is formed in the middle of the front side wall.

Preferably, the second door lock mechanism further comprises a second cover plate and a second screw, wherein:

the middle part of the second cover plate is provided with a poking hole corresponding to the manual poking groove, the four corners of the second cover plate are respectively provided with a second mounting hole, and the outer side edge of the bottom end of the second cover plate is provided with a second attaching part which extends downwards and is matched with the first attaching part;

The number of the second screws is four, and the corresponding second mounting holes are respectively penetrated to fix the lock cylinder block and the second cover plate on the second base.

Preferably, the second door lock mechanism further comprises a gasket, a screw, a locking knob and an O-ring, wherein:

The shape of the gasket is the same as that of the second base, the gasket is correspondingly arranged on the back of the second base, and through holes are respectively formed in the left end and the right end of the gasket;

The two screws are respectively and fixedly arranged at the left end and the right end of the back of the second base, and the end parts of the screws respectively penetrate through the corresponding through holes;

The locking knobs are respectively sleeved with the O-shaped sealing rings and are respectively in threaded connection with the corresponding screw rods so as to clamp and fix the movable door combination.

Compared with the prior art, the utility model has the following technical effects:

(1) Safety and reliability: the first door lock mechanism and the second door lock mechanism which are matched are respectively arranged on the isolator box body and the movable door combination, and the first sensor and the second sensor arranged on the first door lock mechanism are utilized to detect whether the movable door combination is locked or not in real time, and the movable door combination is simple in structure, convenient to process and install and capable of better passing a leakage rate test;

(2) The overhaul is convenient: the first door lock mechanism and the second door lock mechanism are respectively combined with the isolator box body and the movable door and are detachably connected and installed through screws, and the first sensor and the second sensor are fixedly installed through screws, so that the installation and the disassembly are convenient, and the replacement and the maintenance are convenient;

(3) The application range is wide: the self-locking mechanism of the airtight door fully considers the safety in use, is applicable to any sterile inspection isolator, can well ensure that the leakage rate test reaches a normal value, is convenient to improve the detection efficiency, and accords with the GMP standard.

Drawings

FIG. 1 is a schematic diagram of a novel self-locking mechanism application state of a sterile inspection isolator airtight door;

FIG. 2 is a schematic view of a part A of the self-locking mechanism of the hermetic door of the novel sterile inspection isolator of FIG. 1 in a partially enlarged structure;

FIG. 3 is a schematic diagram of the overall structure of a novel self-locking mechanism of a hermetic door of a sterile inspection isolator;

FIG. 4 is a schematic view of a part B of the self-locking mechanism of the hermetic door of the novel sterile inspection isolator of FIG. 3 in an enlarged partial structure;

FIG. 5 is a schematic diagram of a front view of a self-locking mechanism of a novel sterile inspection isolator airtight door according to the present utility model;

FIG. 6 is a schematic side view of a self-locking mechanism of a novel sterile inspection isolator closure door of the present utility model;

FIG. 7 is a schematic top view of a self-locking mechanism of a novel sterile inspection isolator closure door of the present utility model;

FIG. 8 is a schematic cross-sectional view of a novel self-locking mechanism for a hermetic door of a sterile inspection isolator according to the present utility model;

FIG. 9 is a schematic diagram of an explosion structure of a novel self-locking mechanism of a hermetic door of a sterile inspection isolator according to the present utility model;

FIG. 10 is a schematic diagram of a second explosive structure of a self-locking mechanism of a novel hermetic door of a sterile inspection isolator according to the present utility model;

Wherein, each reference sign is:

100-isolator housings; 200-a movable door combination;

300-a first door lock mechanism, 310-a first base, 311-a locking groove, 312-a first induction groove; 320-a first inductor; 330-first cover plate, 331-first mounting hole, 332-first fitting portion; 340-a first screw; 350-fixing blocks;

400-second door lock mechanism, 410-second base, 411-first cylindrical pin, 412-second cylindrical pin, 413-compression spring, 414-countersunk screw, 415-second baffle; 420-lock cylinder blocks, 421-locking blocks, 422-manual shifting grooves, 423-first limiting holes, 424-second limiting holes and 425-spring holes; 430-a second inductor; 440-second cover plate, 441-poking hole, 442-second mounting hole, 443-second fitting part; 450-second screw, 460-spacer; 470-screw; 480-locking knob; 490-O seal.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In some embodiments, as shown in fig. 1, a novel airtight door self-locking mechanism of an aseptic inspection isolator is provided, and the airtight door self-locking mechanism mainly comprises a first door lock mechanism 300 and a second door lock mechanism 400 which are matched with each other, wherein the first door lock mechanism 300 is installed on the isolator box 100, the second door lock mechanism 400 is correspondingly installed on a movable door assembly 200, the movable door assembly 200 adopts a toughened glass door assembly, and the first door lock mechanism 300 and the second door lock mechanism 400 are oppositely arranged to realize lock catch connection between the two.

Through the improvement innovation of the first door lock mechanism 300 and the second door lock mechanism 400, the phenomenon that the self-locking mechanism of the door is not tightly related after the inflatable sealing ring arranged on the outer ring of the movable door combination is inflated is overcome, and therefore the isolator box body is unqualified in leakage rate test is caused. The self-locking mechanism of the airtight door is simple in structure, convenient to process and install and capable of better enabling the glass door to be combined and locked, so that the leakage rate is guaranteed to reach a normal value, and the leakage rate can be better tested.

As shown in fig. 3, 4, 8, 9 and 10, the first door lock mechanism 300 is fixedly mounted on the sliding door assembly 200 in a detachable or welded manner, and mainly includes a first base 310 and a first sensor 320. A locking groove 311 is formed at one side end of the top of the first base 310, a first sensing groove 312 is formed at the other side end, the locking groove 311 is assembled with a locking block 421 on the second door locking mechanism 400 in a matched manner, and the first sensor 320 is installed in the first sensing groove 312.

Accordingly, as shown in fig. 3, 4, 5, 6, 7, 8, 9 and 10, the second door lock mechanism 400, which is a latch mechanism mounted on the sliding door assembly 200, mainly includes a second base 410, a key cylinder block 420 and a second sensor 430. A groove is formed in the second base 410, and the lock cylinder block 420 and the second sensor 430 are adjacently installed in the groove on the second base 410.

The locking block 421 on the lock cylinder block 420 is disposed corresponding to the locking groove 311, so as to be engaged with or disengaged from the locking groove 311 in the process of moving up and down. And the second sensor 430 is arranged corresponding to the first sensor 320, and the second sensor 430 and the first sensor 320 detect whether the second door lock mechanism 400 is closed in place with the first door lock mechanism 300, so as to ensure the closing of the self-locking mechanism.

In some embodiments, as shown in fig. 8 and 9, a first partition plate is integrally formed between the locking groove 311 and the top and front side openings of the first sensing groove 312, and the locking groove 311 and the first sensing groove 312 are divided into two independent spaces by the first partition plate.

The shape of the locking groove 311 is the same as the shape of the locking block 421 of the second door locking mechanism 400, and the cross section of the locking groove is triangular for assembling and embedding the locking block 421. The shape of the first sensing groove 312 is the same as that of the first sensor 320, and the cross section of the first sensing groove is square, so that the first sensor 320 is mounted and fixed in the first sensing groove 312 by using screws.

In some embodiments, as shown in fig. 3, 4, 5, 6, 9 and 10, the first door lock mechanism 300 further includes a first cover plate 330 and a first screw 340, and the first cover plate 330 is detachably mounted on the first base 310 by the first screw 340.

The four corners of the first cover plate 330 are respectively provided with a first mounting hole 331, the inner side of the top end is provided with a first attaching portion 332 extending upwards, the first attaching portion 332 is stepped and is matched with a second attaching portion 443 of the bottom end of the second cover plate 440.

The number of the first screws 340 is four, corresponding to the four first cover plates 330 at the four corners of the first cover plate 330. Four first screws 340 respectively pass through the first mounting holes 331 corresponding to four corners, and are used for mounting the first cover plate 330 on the front portion of the first base 310.

In order to stably fix the first door lock mechanism 300 to the isolator housing 100, a fixing block 350 is provided on the back surface of the first door lock mechanism 300. The fixing block 350 has a U-shaped structure, and two ends of the fixing block are respectively connected to the back of the first base 310 and the separator housing 100 by screws. Of course, the fixing block 350 may be welded to the separator housing 100 as needed.

In some of these embodiments, as shown in fig. 5, 8, 9 and 10, the recess of the second base 410 is designed as a bottom opening and front opening structure in order to facilitate the installation of the key cylinder block 420 and the second sensor 430. And a first cylindrical pin 411, a compression spring 413 and a second cylindrical pin 412 are arranged at the top of the groove at intervals, wherein the first cylindrical pin 411 is a short cylindrical pin, and the second cylindrical pin 412 is a long cylindrical pin.

Specifically, the top ends of the first cylindrical pin 411 and the second cylindrical pin 412 are fixed to the top of the second base 410, and the lower end is embedded in a limiting hole at the top of the lock cylinder block 420. The first cylindrical pin 411 and the second cylindrical pin 412 are located at two side ends, so that a certain limiting effect is achieved on the lock cylinder block 420 sliding up and down, the lock cylinder block 420 is prevented from shaking in the locking process, and then the defect of loose locking with the first door lock mechanism 300 is effectively avoided.

In addition, for the purpose of realizing the automatic locking connection between the second door lock mechanism 400 and the first door lock mechanism 300, a pressing spring 413 is disposed in the second base 410, the top end of the pressing spring 413 is fixed on the top of the second base 410 by a countersunk head screw 414, and the lower end is embedded in a spring hole 425 at the top of the lock cylinder block 420.

The main working principle of the second door lock mechanism 400 is that the self elasticity of the pressing spring 413 is utilized to always keep a downward pressure on the lock cylinder block 420, so that the locking block 421 at the lower end of the second door lock mechanism is pressed and retracted when contacting with the first door lock mechanism 300, and is pressed into the locking groove 311 under the action of the pressing spring 413 when being aligned with the locking groove 311, thereby realizing automatic locking of the first door lock mechanism 300.

In some embodiments, as shown in fig. 9, in order to facilitate a reasonable installation layout of the lock cylinder block 420 and the second sensor 430, a second partition 415 is disposed at a middle position of the bottom opening of the groove on the second base 410, and the bottom opening of the groove is divided into two left and right areas by the second partition 415. The second partition 415 is L-shaped, and has a lateral section on one side thereof provided with the second inductor 430, and the other side thereof is used for accommodating the lower end of the lock cylinder block 420.

In some embodiments, as shown in fig. 9, to achieve the limit assembly with the first cylindrical pin 411, the compression spring 413 and the second cylindrical pin 412, a first limit hole 423, a second limit hole 424 and the spring hole 425 are correspondingly formed on the top of the lock cylinder block 420. The first limiting hole 423, the second limiting hole 424 and the spring hole 425 are respectively movably embedded with the first cylindrical pin 411, the second cylindrical pin 412 and the compression spring 413.

In some embodiments, as shown in fig. 6, 8, 9 and 10, a locking block 421 extending downward is disposed at one side end of the bottom of the lock cylinder block 420, and the locking block 421 and the lock cylinder block 420 body are integrally formed. The lock cylinder block 420 is disposed opposite to the locking groove 311 of the first door lock mechanism 300.

In addition, in order to facilitate the release of the connection of the second door lock mechanism 400 to the first door lock mechanism 300 for opening the movable door assembly 200, a manual dial 422 is provided at a central position of the front sidewall of the key cylinder block 420. When in use, the movable door assembly 200 can be opened by manually pulling the lock cylinder block 420 upwards, pulling the lock block 421 at the lower end of the lock cylinder block out of the lock groove 311, and then turning the movable door assembly 200 upwards.

In some embodiments, as shown in fig. 3, 5, 6, 7, 9 and 10, the second door lock mechanism 400 further includes a second cover plate 440 and second screws 450, and second mounting holes 442 are respectively formed at four corners of the second cover plate 440. Accordingly, the number of the second screws 450 is four, and the second screws pass through the corresponding second mounting holes 442 to fix the lock cylinder block 420 and the second cover plate 440 to the second base 410.

Wherein, in order to facilitate manual access to the lock cylinder block 420, the lock cylinder block 420 is moved upwards to achieve the unlocking purpose. A poking hole 441 corresponding to the manual poking groove 422 is formed in the middle of the second cover plate 440, and the shape of the poking hole 441 is larger than that of the manual poking groove 422.

In addition, as shown in fig. 4, 9 and 10, a second attaching portion 443 extending downward is provided at the outer side of the bottom end of the second cover 440, and the second attaching portion 443 is overlapped with the first attaching portion 332, so as to improve the smoothness and the aesthetic property of the whole surface of the self-locking mechanism of the airtight door.

In some of these embodiments, as shown in fig. 2, 3, 6, 7, 9 and 10, to effect mounting and securing with the sliding door assembly 200. A gasket 460, a screw 470, a locking knob 480, and an O-ring 490 are also provided on the second door lock mechanism 400.

Specifically, the shape of the spacer 460 is the same as that of the second base 410, and the spacer is correspondingly disposed on the back of the second base 410, and the left and right ends of the spacer are respectively provided with a through hole for inserting the screw 470. The gasket 460 is made of POM material and is used for being attached to the outer side wall of the sliding door assembly 200, so as to avoid the second base 410 from directly contacting with the sliding door assembly 200, and effectively prevent the glass from being broken due to self-weight extrusion.

The two screws 470 are respectively and fixedly installed at the left and right ends of the back of the second base 410 by adopting a threaded connection or a welded connection manner at the inner ends, and the outer ends are respectively fixed by adopting locking knobs 480 after passing through corresponding through holes on the gasket 460 and the installation holes on the movable door combination 200.

The number of the locking knobs 480 is two, in order to avoid the local extrusion of the movable door assembly 200 from cracking during the screwing process of the locking knobs 480, the locking knobs 480 are respectively sleeved with the O-shaped sealing rings 490, and the O-shaped sealing rings 490 are in contact with the inner side walls of the movable door assembly 200. The locking knobs 480 are respectively in threaded connection with the corresponding screw rods 470, and the purpose of clamping and fixing the sliding door assembly 200 can be achieved by screwing the locking knobs 480.

Through the design of having special POM cushion 460 between second base 410 and dodge gate combination 200, connect through 2 locking knob 480 and screw up, the O type sealing washer 490 is installed to locking knob 480 inboard, can guarantee simultaneously that the connecting hole of opening on the dodge gate combination 200 is totally airtight, has guaranteed that the leak rate test reaches normal value. This set of mechanisms better locks the sliding door assembly 200 so that the leak rate reaches a normal value.

In some embodiments, in order to fully consider the use safety, the second door lock mechanism 400 and the first door lock mechanism 300 are made of stainless steel or aluminum alloy, the parts are made by adopting a mirror polishing process, the surface finish is good and attractive, the roughness meets the design requirement of the isolator, and the leakage rate test can be well ensured to reach the normal value.

When the sterility check isolator is in operation, the inner chamber needs to be tested for leak rate and the combination 200 is kept closed for a long period of time. The movable door assembly 200 is locked by a glass door self-locking mechanism, and when the self-locking mechanism is not locked tightly, the leakage rate test can not reach a normal value easily, so that the normal starting work of the equipment is affected.

By adopting the airtight door self-locking mechanism of the scheme, the first base 310 can be fixed with the isolator box 100 through welding and screw fixing, the second base 410 and the bottom first base 310 are firmly locked together through the lock cylinder block 420, meanwhile, the first cover plate 330 and the second cover plate 440 can well protect the lock cylinder block 420, and the second inductor 430 and the first inductor 320 detect whether the second door locking mechanism 400 is locked with the first door locking mechanism 300 or not, so that the movable door assembly 200 and the isolator box 100 are on the same plane, the gap between the two is reduced, and the leakage risk is avoided.

In addition, the self-locking mechanism of the airtight door of the sterile inspection isolator can be adjusted according to the difference of the sizes of the inner chambers of the sterile inspection isolator, so that the sterile inspection isolator is more convenient and faster to lock, the leakage rate test reaches a normal value, and then the rest operation steps are carried out.

The last points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;

Secondly, in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other without conflict;

Finally, the foregoing description of the preferred embodiment of the utility model is provided for the purpose of illustration only, and is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (2)

1. Novel aseptic inspection isolator airtight door self-locking mechanism, its characterized in that includes first door lock mechanism (300) that set up on isolator box (100) and corresponds second door lock mechanism (400) that set up on dodge gate combination (200), wherein:

The first door lock mechanism (300) comprises a first base (310) and a first inductor (320), wherein a locking groove (311) is formed in one side end of the top of the first base (310), a first induction groove (312) is formed in the other side end of the top of the first base, and the first inductor (320) is arranged in the first induction groove (312);

The second door lock mechanism (400) comprises a second base (410), a lock cylinder block (420) and a second inductor (430), wherein the lock cylinder block (420) and the second inductor (430) are adjacently arranged in grooves on the second base (410) and are respectively and correspondingly arranged with the locking groove (311) and the first inductor (320);

the first door lock mechanism (300) further comprises a first cover plate (330) and a first screw (340), wherein:

The four corners of the first cover plate (330) are respectively provided with a first mounting hole (331), and the inner side edge of the top end is provided with a first attaching part (332) extending upwards;

Four first screws (340) respectively penetrate through the corresponding first mounting holes (331) to mount the first cover plate (330) on the front part of the first base (310);

the first door lock mechanism (300) further comprises a fixed block (350), wherein:

the fixing block (350) is of a U-shaped structure, and two ends of the fixing block are respectively connected with the back of the first base (310) and the isolator box body (100) through screws;

The second door lock mechanism (400) further comprises a second cover plate (440) and a second screw (450), wherein:

A poking hole (441) corresponding to the manual poking groove (422) is formed in the middle of the second cover plate (440), second mounting holes (442) are respectively formed in four corners, and a second attaching part (443) which extends downwards and is matched with the first attaching part (332) is arranged on the outer side edge of the bottom end;

four second screws (450) respectively penetrate through the corresponding second mounting holes (442) to fix the lock cylinder block (420) and the second cover plate (440) on the second base (410);

The top and the front side of the locking groove (311) and the first induction groove (312) are provided with openings, a first partition plate is arranged between the locking groove (311) and the first induction groove, the cross section of the locking groove (311) is triangular, and the cross section of the first induction groove (312) is square;

The recess of second base (410) is bottom and front side opening, and the top interval of recess is provided with first cylindric lock (411), hold-down spring (413) and second cylindric lock (412), wherein:

The top ends of the first cylindrical pin (411) and the second cylindrical pin (412) are fixed at the top of the second base (410), and the lower end of the first cylindrical pin is embedded in a limiting hole at the top of the lock cylinder block (420);

The top end of the compression spring (413) is fixed to the top of the second base (410) through a countersunk head screw (414), and the lower end of the compression spring is embedded in a spring hole (425) in the top of the lock cylinder block (420);

A second baffle (415) is arranged at the middle position of the bottom opening of the groove on the second base (410), wherein:

The second partition plate (415) is L-shaped, a transverse section of one side of the second partition plate is provided with the second inductor (430), and the other side of the second partition plate is used for accommodating the lower end of the lock cylinder block (420);

First spacing hole (423), second spacing hole (424) and spring hole (425) have been seted up to correspondence at lock core piece (420) top, wherein:

The first limiting hole (423), the second limiting hole (424) and the spring hole (425) are respectively and movably embedded with the first cylindrical pin (411), the second cylindrical pin (412) and the compression spring (413);

the second door lock mechanism (400) further comprises a gasket (460), a screw (470), a locking knob (480) and an O-ring seal (490), wherein:

The shape of the gasket (460) is the same as that of the second base (410), the gasket is correspondingly arranged on the back of the second base (410), and through holes are respectively formed at the left end and the right end of the gasket;

The two screws (470) are respectively and fixedly arranged at the left end and the right end of the back of the second base (410), and the ends of the screws respectively pass through the corresponding through holes to be arranged;

The number of the locking knobs (480) is two, the O-shaped sealing rings (490) are respectively sleeved on the locking knobs, and the locking knobs are respectively in threaded connection with the corresponding screw rods (470) so as to clamp and fix the movable door combination (200).

2. The novel self-locking mechanism for the airtight door of the sterile inspection isolator according to claim 1, wherein a locking block (421) which extends downwards and corresponds to the locking groove (311) is arranged at one side end of the bottom of the lock cylinder block (420), and a manual poking groove (422) is formed in the middle of the front side wall.