Cabin door self-locking mechanism

Abstract

The utility model relates to a cabin door self-locking mechanism which comprises a machine body, a front shell, a cabin door, a driving assembly, a cabin opening assembly and a self-locking assembly, the cabin opening assembly is in transmission connection with the driving assembly, and the lower edge of the cabin door is provided with a barrier strip; the cabin opening assembly comprises a rotating seat, a first driving end and a second driving end, and the first driving end and the second driving end are arranged on the two sides of the rotating seat respectively; the self-locking assembly comprises a first self-locking end, a second self-locking end and a reset tension spring, the middle of a whole formed by the first self-locking end and the second self-locking end is hinged to the inner side of the machine body, one end of the reset tension spring is connected with the second self-locking end, and the other end of the reset tension spring is connected with the machine body; the first driving end can drive the first self-locking end to rotate; the second driving end can drive the cabin door to open and close; and the second self-locking end can limit the rotation of the barrier strip in a reset state. A special cabin door opening structure is used, mechanical locking of the cabin door is unlocked while the cabin door is opened, and opening and closing actions and mechanical unlocking actions of the cabin door are simultaneously performed by using one driving motor.

Description

Technical Field

[0001] The utility model relates to the technical field of PCR amplification instruments, in particular to a cabin door self-locking mechanism. Background Art

[0002] PCR amplifier, also known as PCR gene amplifier, PCR nucleic acid amplifier, polymerase chain reaction nucleic acid amplifier, is an instrument that uses PCR (Polymerase chain reaction) technology to amplify specific DNA. It is widely used in medical and biological laboratories, for example, to determine whether the specimen will show a spectrum of a certain genetic disease, diagnosis of infectious diseases, gene replication, and paternity testing.

[0003] During the PCR amplification process, the sealed test kit is placed in the instrument, and the instrument can automatically carry out the entire PCR reaction process, involving high-temperature lysis, high and low temperature rise and fall cycles of PCR, and detection of fluorescent signals.

[0004] However, the high temperature of lysis and the high temperature section of PCR test can reach above 90℃. To prevent accidental contact with the human body, a door is required to isolate this part from people, and the door should have a self-locking device to prevent it from being opened by hand without tools. In addition, the detection of fluorescent signals requires a light-proof environment, and the door is self-locking to prevent people from opening the door by mistake, which may cause erroneous test results.

[0005] At present, the hatch uses a motor to open and close the hatch, but does not perform mechanical locking. It only relies on the gap between the shell and the hatch to prevent the hatch from being opened, which has poor reliability. If an additional motor or electromagnetic mechanism is added to lock the hatch to prevent the hatch from being opened during use, the equipment cost will increase. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a hatch door self-locking mechanism, which uses a special hatch door opening structure to mechanically unlock the hatch door while opening the hatch door, thereby realizing the use of a drive motor to simultaneously perform the switching action and the hatch door mechanical unlocking action.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] The hatch door self-locking mechanism comprises a body, a front shell installed on the front side of the body, and a hatch door installed on the front shell, and also comprises a driving assembly, a hatch opening assembly and a self-locking assembly, wherein the hatch opening assembly is in transmission connection with the driving assembly, the self-locking assembly is installed on the inner side of the body, and a blocking strip is provided on the lower edge of the hatch door;

[0009] The cabin opening assembly comprises a swivel seat, a first driving end and a second driving end, wherein the first driving end and the second driving end are respectively arranged on both sides of the swivel seat;

[0010] The self-locking assembly comprises a first self-locking end, a second self-locking end and a reset spring, wherein the middle part of the whole formed by the first self-locking end and the second self-locking end is hingedly mounted on the inner side of the machine body, one end of the reset spring is connected to the second self-locking end, and the other end is connected to the machine body;

[0011] The first driving end is aligned with the first self-locking end and can drive the first self-locking end to rotate; the second driving end is aligned with the middle of the cabin door and can drive the cabin door to open and close; the second self-locking end can limit the rotation of the blocking bar in the reset state.

[0012] Furthermore, a rotating shaft is fixed to the lower side of the door, both ends of the rotating shaft are respectively hinged to the body, and torsion springs are respectively installed at the hinges to keep the door closed without external force.

[0013] Furthermore, the driving assembly includes a servo motor, a screw, a driving plate, a sliding rod, a sliding seat and a connecting rod. The servo motor is installed in the machine body. The screw is coaxially fixedly connected to the output end of the servo motor. The two sliding seats are fixedly installed in the machine body. A sliding rod is cooperated with and installed in each of the sliding seats. The two sliding rods are parallel to each other, and one end of the two sliding rods is fixedly installed with a driving plate. The screw is connected to the center hole of the driving plate by a threaded fit. The other ends of the two sliding rods are fixedly connected with the connecting rod, and the swivel seat is fixedly installed in the middle of the connecting rod.

[0014] Furthermore, a mounting seat is fixed in the body, and the first self-locking end and the second self-locking end are integrally hingedly rotatably mounted on the mounting seat.

[0015] Furthermore, a first roller is hingedly connected to the first driving end, and a second roller is hingedly connected to the second driving end. The axis of the first roller is in a vertical state, and the axis of the second roller is in a horizontal state.

[0016] Furthermore, the end of the first self-locking end is also provided with an inclined surface. When the cabin opening assembly is driven forward by the driving assembly, the first roller can abut against the inclined surface and push the first self-locking end to rotate, thereby driving the second self-locking end to rotate and stagger with the blocking bar.

[0017] Furthermore, a cushion block is fixed to the middle portion of the inner side of the hatch, and when the hatch opening assembly is driven by the driving assembly to move forward, the second roller can abut against the cushion block.

[0018] The utility model has the following advantages:

[0019] 1. The hatch is purely mechanically locked, with good locking reliability, and only one driving mechanism is needed to open and close the hatch, and ensure that the hatch is self-locking after closing and unlocking when opening.

[0020] 2. Reduce the use of additional drive mechanisms, and avoid locking failure or unlocking abnormalities caused by control abnormalities of drive mechanisms such as motors or electromagnetic mechanisms or component failures. The hatch opening and closing structure is simple, with a small number of parts, easy processing and production, controllable performance and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 The utility model is a three-dimensional structure of the hatch, the hatch opening component and the self-locking component Figure 1 ;

[0023] Figure 3 The utility model is a three-dimensional structure of the hatch, the hatch opening component and the self-locking component Figure 2 ;

[0024] Figure 4 It is a structural schematic diagram of the cabin opening assembly of the utility model;

[0025] Figure 5 It is a structural schematic diagram of the self-locking component of the utility model;

[0026] Figure 6 It is a projection diagram of the hatch opening component and the self-locking component of the utility model in the horizontal plane;

[0027] In the figure: 1-front shell, 2-hatch door, 2a-rotating shaft, 2b-torsion spring, 2c-baffle, 2d-pad, 3-drive assembly, 3a-servo motor, 3b-screw, 3c-drive plate, 3d-slide rod, 3e-slide seat, 3f-connecting rod, 4-hatch opening assembly, 4a-swivel seat, 4b-first drive end, 4b1-first roller, 4c-second drive end, 4c1-second roller, 5-self-locking assembly, 5a-first self-locking end, 5a1-inclined surface, 5b-second self-locking end, 5c-reset spring, 6-mounting seat. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0029] like Figures 1 to 6As shown, the hatch self-locking mechanism includes a body, a front shell 1 installed on the front side of the body, and a hatch 2 installed on the front shell 1. The hatch self-locking mechanism also includes a driving component 3, a hatch opening component 4 and a self-locking component 5. The hatch opening component 4 is transmission-connected with the driving component 3. The driving component 3 is a linear drive. The driving component 3 can drive the hatch opening component 4 to move forward and backward. The self-locking component 5 is installed on the inner side of the body. The lower edge of the hatch 2 is provided with a blocking bar 2c. When the hatch 2 is rotated outward and opened, the blocking bar 2 can be rotated inward; the hatch opening component 4 includes a swivel seat 4a, a first driving end 4b and a second driving end 4c. The first driving end 4b and the second driving end 4c are respectively arranged on the swivel seat 4a. On both sides, in the present embodiment, the swivel seat 4a, the first driving end 4b and the second driving end 4c are an integrally formed rigid structure; the self-locking component 5 comprises a first self-locking end 5a, a second self-locking end 5b and a reset spring 5c, and the middle part of the whole formed by the first self-locking end 5a and the second self-locking end 5b is hingedly installed on the inner side of the machine body, one end of the reset spring 5c ​​is connected to the second self-locking end 5b, and the other end is connected to the machine body; the first driving end 4b is aligned with the first self-locking end 5a, and can drive the first self-locking end 5a to rotate; the second driving end 4c is aligned with the middle part of the cabin door 2, and can drive the cabin door 2 to open and close; the second self-locking end 5b can limit the rotation of the baffle 2c in the reset state. When the driving assembly 3 drives the hatch opening assembly 4 to move forward, the first driving end 4b abuts against the first self-locking end 5a. As the hatch opening assembly 4 moves, the whole formed by the first self-locking end 5a and the second self-locking end 5b rotates clockwise, so that the second self-locking end 5b is staggered with the blocking bar 2c, and the unlocking is completed. The hatch opening assembly 4 moves further forward, and the second driving end 4c abuts against the middle of the cabin door 2, and pushes the cabin door 2 open to achieve the opening of the cabin door 2. When the cabin door 2 is closed, the driving assembly 3 drives the hatch opening assembly 4 to move backward, and the cabin door 2 is gradually closed under the action of the torsion spring 2b. When the second driving end 4c is separated from the cabin door 2 (the cabin door 2 is already closed at this time), the hatch opening assembly 4 continues to move backward until the first driving end 4b is separated from the first self-locking end 5a. Under the reset action of the tension spring 5c, the whole formed by the first self-locking end 5a and the second self-locking end 5b rotates counterclockwise, so that the second self-locking end 5b blocks the blocking bar 2c again, and the cabin door 2 is self-locked.

[0030] Furthermore, a rotating shaft 2a is fixed to the lower side of the door 2, both ends of the rotating shaft 2a are respectively hinged to the body, and torsion springs 2b are respectively installed at the hinges to keep the door 2 closed without external force.

[0031] In this embodiment, the driving assembly 3 includes a servo motor 3a, a screw 3b, a driving plate 3c, a sliding rod 3d, a slide seat 3e and a connecting rod 3f. The servo motor 3a is installed in the machine body, the screw 3b is coaxially fixedly connected to the output end of the servo motor 3a, the two slide seats 3e are fixedly installed in the machine body, and a sliding rod 3d is cooperatedly installed in each of the slide seats 3e. The two sliding rods 3d are parallel to each other, and one end of the two sliding rods 3d is fixedly installed with a driving plate 3c, the screw 3b is connected to the center hole of the driving plate 3c by a threaded fit, the other ends of the two sliding rods 3d are fixedly connected with the connecting rod 3f, and the swivel seat 4a is fixedly installed in the middle of the connecting rod 3f.

[0032] It is understandable that the present embodiment only introduces one driving mode, and other driving modes may be used under the premise that the cabin opening component 4 can move linearly, such as an electric telescopic cylinder, a hydraulic telescopic rod, etc.

[0033] Furthermore, a mounting seat 6 is fixed in the machine body, and the first self-locking end 5a and the second self-locking end 5b form a whole that is hinged and rotatably mounted on the mounting seat 6. When in use, the self-locking component 5 is a moving part. If it is directly mounted on the machine body, it may cause damage to the machine body. In order to reduce maintenance costs, the utility model adopts a mounting seat 6, so that the whole formed by the first self-locking end 5a and the second self-locking end 5b is in direct contact with the mounting seat 6. When the mounting seat 6 is damaged, the mounting seat 6 can be directly replaced without replacing the machine body.

[0034] Furthermore, the first driving end 4b is hinged with a first roller 4b1, and the second driving end 4c is hinged with a second roller 4c1, the axis of the first roller 4b1 is vertical, and the axis of the second roller 4c1 is horizontal. By providing the roller structure, the sliding friction is converted into rolling friction, so that the wear of the hatch opening component 4, the self-locking component 5 and the hatch 2 is reduced, thereby extending the service life of the equipment and reducing the maintenance cost.

[0035] Furthermore, the end of the first self-locking end 5a is also provided with an inclined surface 5a1, and when the hatch opening assembly 4 is driven forward by the driving assembly 3, the first roller 4b1 can abut against the inclined surface 5a1 and push the first self-locking end 5a to rotate, thereby driving the second self-locking end 5b to rotate and stagger with the stop bar 2c. The inclined surface 5a1 makes the switching between the self-locking states smoother.

[0036] Furthermore, a cushion block 2d is fixed to the middle of the inner side of the hatch 2. When the hatch opening assembly 4 is driven forward by the driving assembly 3, the second roller 4c1 can abut against the cushion block 2d. The cushion block 2d is preferably made of a wear-resistant and high-temperature resistant material. The second roller 4c1 contacts the cushion block 2d, which can avoid direct contact between the second roller 4c1 and the hatch 2 body, thereby reducing the wear of the hatch 2.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hatch door self-locking mechanism, comprising a machine body, a front shell (1) mounted on the front side of the machine body, and a hatch door (2) mounted on the front shell (1), characterized in that: It also comprises a driving assembly (3), a hatch opening assembly (4) and a self-locking assembly (5), wherein the hatch opening assembly (4) is drivingly connected to the driving assembly (3), the self-locking assembly (5) is installed on the inner side of the machine body, and a blocking strip (2c) is provided at the lower edge of the hatch door (2); The cabin opening assembly (4) comprises a rotating seat (4a), a first driving end (4b) and a second driving end (4c), wherein the first driving end (4b) and the second driving end (4c) are respectively arranged on two sides of the rotating seat (4a); The self-locking component (5) comprises a first self-locking end (5a), a second self-locking end (5b) and a return tension spring (5c); the middle part of the whole formed by the first self-locking end (5a) and the second self-locking end (5b) is hingedly mounted on the inner side of the machine body; one end of the return tension spring (5c) is connected to the second self-locking end (5b), and the other end is connected to the machine body; The first driving end (4b) is aligned with the first self-locking end (5a) and is capable of driving the first self-locking end (5a) to rotate; the second driving end (4c) is aligned with the middle of the cabin door (2) and is capable of driving the cabin door (2) to open and close; the second self-locking end (5b) is capable of limiting the rotation of the blocking bar (2c) in a reset state.

2. The hatch door self-locking mechanism according to claim 1, characterized in that: A rotating shaft (2a) is fixed on the lower side of the door (2), and both ends of the rotating shaft (2a) are respectively hinged to the machine body, and torsion springs (2b) are respectively installed at the hinges, so that the door (2) remains closed in the absence of external force.

3. The hatch door self-locking mechanism according to claim 1, characterized in that: The driving assembly (3) comprises a servo motor (3a), a screw rod (3b), a driving plate (3c), a sliding rod (3d), a sliding seat (3e) and a connecting rod (3f). The servo motor (3a) is installed in the machine body. The screw rod (3b) is coaxially fixedly connected to the output end of the servo motor (3a). Two sliding seats (3e) are fixedly installed in the machine body. A sliding rod (3d) is installed in each sliding seat (3e). The two sliding rods (3d) are parallel to each other, and one end of the two sliding rods (3d) is fixedly installed with the driving plate (3c). The screw rod (3b) is connected to the center hole of the driving plate (3c) by threaded cooperation. The other ends of the two sliding rods (3d) are fixedly connected with the connecting rod (3f). The rotating seat (4a) is fixedly installed in the middle of the connecting rod (3f).

4. The hatch door self-locking mechanism according to claim 1, characterized in that: A mounting seat (6) is fixed in the body, and the first self-locking end (5a) and the second self-locking end (5b) are integrally hingedly rotatably mounted on the mounting seat (6).

5. The hatch door self-locking mechanism according to claim 1, characterized in that: A first roller (4b1) is hingedly connected to the first driving end (4b), and a second roller (4c1) is hingedly connected to the second driving end (4c); the axis of the first roller (4b1) is in a vertical state, and the axis of the second roller (4c1) is in a horizontal state.

6. The hatch door self-locking mechanism according to claim 5, characterized in that: The end of the first self-locking end (5a) is also provided with an inclined surface (5a1), and when the cabin opening assembly (4) is driven by the driving assembly (3) to move forward, the first roller (4b1) can abut against the inclined surface (5a1) and push the first self-locking end (5a) to rotate, thereby driving the second self-locking end (5b) to rotate and stagger with the blocking bar (2c).

7. The hatch door self-locking mechanism according to claim 5, characterized in that: A cushion block (2d) is fixed to the middle of the inner side of the hatch (2), and when the hatch opening assembly (4) is driven by the driving assembly (3) to move forward, the second roller (4c1) can abut against the cushion block (2d).

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