Clean room module and closing device thereof

Abstract

The invention relates to the technical field of clean rooms, in particular to a clean room module and a sealing device thereof. The closing device is installed on a window of a clean room module and comprises a curtain, an electric roller and a telescopic wire box, one end of the curtain is connected to a cable of the telescopic wire box, and the other end of the curtain is connected to the electric roller; the telescopic wire box tends to contract the cable and pulls the curtain in the direction of the telescopic wire box; the electric roller is used for pulling the curtain to the direction away from the telescopic wire box. Due to the fact that the telescopic wire box is used for providing traction force for the curtain, a bottom rod which is large in size and weight does not need to be arranged between the two clean room modules. Therefore, the distance between the guide rails between the two clean room modules can be smaller. In this way, the carrying device can be transferred between the two clean room modules more smoothly through the guide rails.

Description

Technical Field

[0001] This patent relates to the field of clean room technology, and in particular to a clean room module and a sealing device for the clean room module. Background Art

[0002] A clean room refers to a well-enclosed space where parameters such as air cleanliness, temperature, humidity, pressure, and noise are controlled as needed.

[0003] The development of clean rooms is closely linked to modern industry and cutting-edge technology. Since industries such as precision machinery, semiconductors, pharmaceuticals, aerospace, and medical care all have high requirements for the environment, clean room technology has been continuously developing, and clean rooms have been widely used in the above fields.

[0004] On the other hand, the high mobility of the industry is a new trend in the increasingly fierce market competition. Traditional clean rooms are fixed in the factory. When encountering many kinds of events such as the introduction of new process flow, the rollout of new product lines, the iteration and upgrade of factory functions, the addition of new equipment, etc., the production line will be changed. In the process of change, it is inevitable to dismantle and relocate the clean room. The clean room of the existing technology has high cost and long installation time during the relocation process.

[0005] In order to solve this problem, the prior art proposes a clean room system based on the modular concept. In this system, different clean room modules are used to handle different operating procedures, and by combining with each other, the system can handle complex manufacturing processes.

[0006] In order to ensure cleanliness, the windows between clean room modules need to be connected in a sealed manner as much as possible. For this purpose, the windows are equipped with curtains, which remain open when the clean room modules are connected to each other and are closed when they are not connected. In response to this demand, the prior art proposes a closing device for clean room modules, which uses electric rolling to drive the curtains to move to close the windows. However, in a clean room system, the windows of two clean room modules often need to be connected by guide rails to transport materials. The two guide rails will be cut off by the curtains, so a certain distance needs to be reserved between the guide rails. Obviously, this distance should be as small as possible so that the carrier can smoothly transfer from one clean room module to another. However, due to space and structural limitations, it is difficult for the prior art to meet this smooth transition requirement. Summary of the invention

[0007] In order to solve or at least partially solve the above technical problems, the present patent provides a clean room module and a sealing device for the clean room module.

[0008] This patent provides a sealing device for a clean room module, which is installed on the window of the clean room module and includes:

[0009] Curtains, electric rollers and telescopic boxes,

[0010] One end of the curtain is connected to the cable of the telescopic box, and the other end is connected to the electric roller;

[0011] The telescopic box tends to retract the cable, pulling the curtain in its direction;

[0012] The motorized roller is used to pull the curtain away from the extension box.

[0013] Optionally, it also includes:

[0014] Two sealing strips are respectively arranged on opposite sides of the window frame, and two sides of the curtain are respectively embedded in the two sealing strips to move along the length direction of the sealing strips.

[0015] Optionally, the telescopic wire box includes a box body, a coil spring, a rotating disk and a self-locking structure;

[0016] The turntable is connected to the box body through a rotating shaft so as to be rotatable relative to the box body;

[0017] The coil spring is respectively connected to the turntable and the cable and is contained in the box body so as to use its own elastic force to pull back the cable, and the cable is wound around the turntable;

[0018] A self-locking structure, acting on the turntable, for unidirectionally locking the turntable to stop the retracting movement of the cable in the direction toward the box body;

[0019] The self-locking structure can be unlocked.

[0020] Optionally, the self-locking structure includes:

[0021] A ratchet wheel is coaxially arranged with the turntable;

[0022] A pawl, arranged in cooperation with a ratchet wheel;

[0023] A driver is connected to the pawl, and is used for driving the pawl to move closer to or away from the ratchet wheel, so as to lock the turntable through the ratchet wheel, or to unlock the turntable.

[0024] Optionally, the driver comprises:

[0025] a spring, pressing against the pawl so that the pawl tends to press against the ratchet wheel;

[0026] The solenoid valve acts on the pawl, and when energized, pulls the pawl away from the ratchet wheel to unlock the turntable.

[0027] Optionally, a self-locking structure acts on the turntable to unidirectionally lock the turntable to stop the movement of the cable toward the box body when the cable is pulled out and released for the first time;

[0028] The self-locking structure is also used to release the lock when the cable is pulled out a second time.

[0029] Optionally, the self-locking structure includes:

[0030] The self-locking track and the limit cavity are respectively arranged on the turntable and the box body;

[0031] The ball is arranged in the limit cavity and connected to the self-locking track;

[0032] The self-locking track comprises an inner ring track, an outer ring track, a first guide channel and a second guide channel;

[0033] The first guide channel connects the inner ring track and the outer ring track;

[0034] The inner ring track has a starting position, the outer ring track has a terminating position, the second guide channel is unidirectionally connected from the terminating position to the starting position, and a stop wall is arranged in the second guide channel;

[0035] When the cable is pulled out from the initial position, the turntable rotates in the first direction, and the ball moves along the starting position, the inner ring track, the first guide channel to the outer ring track in sequence under the restriction of the limit cavity;

[0036] When the cable is released for the first time, the turntable is driven by the coil spring to rotate in the second direction so that the ball enters the second guide channel from the end position and abuts against the stop wall to lock the turntable;

[0037] When the cable is pulled out for the second time, the turntable rotates in the first direction, and the ball continues to move along the second guide channel to the starting position under the restriction of the limit cavity;

[0038] When the cable is released for the second time, the turntable rotates in the second direction driven by the coil spring, so that the ball moves in the inner ring track until the cable contracts and returns to the initial position.

[0039] Optionally, the end position has a higher altitude than the start position;

[0040] The second guide channel includes:

[0041] A first guide wall, one side of which is connected to the outer ring track and divides the outer ring track into two parts with different heights, and the other side of the first guide wall is connected to the stop wall;

[0042] The second guide wall is set at an angle with the first guide wall. One side of the second guide wall is connected to the inner ring track, and the other side is connected to the stop wall. The height of the path guided by the second guide wall is lower than the height of the path guided by the first guide wall.

[0043] Optionally, the first guiding channel includes:

[0044] The third guide wall is connected to the inner ring track and divides the inner ring track into two parts with different heights to guide the balls from the inner ring track to the outer ring track.

[0045] Optionally, it also includes:

[0046] Bottom rod, the bottom rod is set on the curtain, the curtain is connected to the telescopic wire box through the bottom rod, the weight of the bottom rod is less than 100g, and the thickness is less than or equal to 5mm;

[0047] There are two telescopic wire boxes, which are connected to both sides of the curtains respectively.

[0048] This patent also provides a clean room module having a window, which is used to dock with the windows of other clean room modules; the window is provided with the aforementioned closing device.

[0049] Compared with the prior art, the present invention uses a telescopic wire box to provide traction for the curtain, so there is no need to set a large and heavy bottom rod between the two clean room modules. Therefore, the spacing between the guide rails between the two clean room modules can be smaller. This enables the carrier to transfer between the two clean room modules more smoothly through the guide rails. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the implementation of this patent, the following is a brief introduction to the relevant drawings. It can be understood that the drawings described below are only used to illustrate some implementations of this patent, and ordinary technicians in this field can also obtain many other technical features and connection relationships not mentioned in this article based on these drawings.

[0051] Figure 1 It is a three-dimensional schematic diagram of a clean room module according to an embodiment of the present patent;

[0052] Figure 2 It is a three-dimensional schematic diagram of a clean room system according to an embodiment of the present patent;

[0053] Figure 3 It is a schematic diagram of a window of a clean room module in the prior art;

[0054] Figure 4 It is a schematic diagram of various structures and devices between windows of a clean room module in the prior art;

[0055] Figure 5 It is a schematic diagram of a window of a clean room module in an embodiment of the present patent;

[0056] Figure 6 It is a schematic diagram of the internal structure of a telescopic box of a clean room module in an embodiment of the present patent;

[0057] Figure 7 It is a schematic diagram of the internal structure of a telescopic box of another clean room module of the embodiment of the present patent;

[0058] Figure 8 This is a schematic diagram of the internal structure of a telescopic box of another clean room module in an embodiment of the present patent;

[0059] Fig. 9 yes Figure 8 A magnified schematic diagram of the self-locking structure. Description of reference numerals:

[0060] a. Clean room module; 1. Electric roller; 2. Bottom rod; 3. Window; 4. Curtain; 5. Guide rail; 6. Telescopic box; 61. Box body; 62. Coil spring; 63. Turntable; 7. Self-locking structure; 71. Ratchet; 72. Paw; 73. Limiting cavity; 74. Driver; 741. Spring; 742. Solenoid valve; 75. Self-locking track; 751. Inner ring track; 7511. Starting position; 752. Outer ring track; 7521. End position; 753. First guide channel; 7531. Third guide wall; 754. Second guide channel; 7541. Stop wall; 7542. First guide wall; 7543. Second guide wall; 755. Ball; 8. Cable; 9. Sealing strip. DETAILED DESCRIPTION

[0061] The patent is described in detail below in conjunction with the accompanying drawings.

[0062] A typical clean room module is Figure 1 As shown, it has a window 3. Figure 2As shown, when two or more clean room modules a are assembled together in a state where windows 3 are opposite to each other, a clean room system can be formed. A mechanical arm, a guide rail, a conveying device and various processing equipment such as a welding device, an etching device, a spraying device, a polishing device, etc. can be provided in the clean room module a so that the material can be processed when rotating between the clean room modules a. For example, a centrifugal granulation device can be provided in a previous clean room module a, and the granulated product can be transported to the vicinity of the window 3 through a conveyor belt. A conveyor belt is also provided in the next clean room module a, and a pressure device is provided at the end of the conveyor belt to press the granulated product into the shape of a mold. For another example, a mechanical arm can also be provided in the central clean room module a, and multiple peripheral clean room modules a are connected to the central clean room module a from multiple directions, and the mechanical arm is used to perform product assembly operations. The clean room system assembled by the clean room modules a can have many functions, which will not be repeated here.

[0063] See also Figure 3 As shown, the inventor of this patent found that the closing device of the clean room module a proposed in the prior art includes: a curtain 4, an electric roller 1 and a bottom rod 2. One end of the curtain 4 is connected to the bottom rod 2, and the other end is connected to the electric roller 1. With the help of the electric roller 1, the curtain 4 can be pulled up to open the window 3. The curtain 4 tends to be pulled down by the dead weight of the bottom rod 2. When the window 3 needs to be closed, the electric roller 1 can be made to gradually release the curtain 4, and the window 3 can be closed under the gravity of the bottom rod 2.

[0064] However, this device requires the bottom rod 2 to have a considerable weight in principle to overcome the friction between the two sides of the window 3 and the curtain 4, which places requirements on the deadweight, that is, the material and size of the bottom rod 2. In fact, most of the bottom rods 2 in the prior art have a width of more than 6 mm and are made of metal or alloy materials.

[0065] However, see Figure 4 As shown, in a clean room system, the windows 3 of two clean room modules a often need to be connected by a guide rail 5 so that materials can be transported by a transport device such as a transport trolley or a transport pallet. When the window 3 is closed, the two guide rails 5 will be cut off by the curtain 4, so a certain distance needs to be reserved between the guide rails 5. Obviously, this distance should be as small as possible so that the transport device can smoothly transition from one clean room module to another. Since the width of the bottom rod 2 determines the size of this distance, under the premise of using the existing clean room module a's closing device, a longer-sized transport device is required. For clean room modules a with relatively limited space, this will in turn affect their overall design.

[0066] Of course, if the bottom rod 2 is not used to pull the curtain 4, two electric rollers 1 can also be set to pull the curtain 4 from two directions. However, such a setting undoubtedly increases the cost and increases the difficulty of controlling the opening and closing of the curtain 4, and the electric roller 1 set at the bottom still occupies a large bottom space.

[0067] In view of this, the embodiment of this patent proposes a clean room module a and a sealing device for the clean room module a to solve the above technical problems.

[0068] First embodiment

[0069] The first embodiment of this patent proposes a clean room module a, see Figure 1 and Figure 5 As shown, it has a window 3, and the window 3 is used to dock with the window 3 of other clean room modules a. The window 3 is provided with a closing device of the clean room module a.

[0070] Specifically, the first embodiment of the present invention proposes a closure of a clean room module a installed on the window 3 of the clean room module a, see Figure 5 As shown, including:

[0071] Curtain 4, electric roller 1 and telescopic wire box 6,

[0072] One end of the curtain 4 is connected to the cable 8 of the telescopic wire box 6, and the other end is connected to the electric roller 1;

[0073] The telescopic box 6 tends to retract the cable 8 and pull the curtain 4 in the direction of itself;

[0074] The electric roller 1 is used to pull the curtain 4 in a direction away from the telescopic wire box 6 .

[0075] The retractable wire box 6 is a mechanical device that can retract the cable 8 back into the device when the cable 8 is pulled away from the device. There are many types of retractable wire box 6 structures in the prior art. Basically, any device that can pull the cable 8 back into the retractable wire box 6 can be used in this patent. For example, the pull-back structure of a measuring tape can be regarded as a retractable wire box 6, which can make the tape measure tend to retract back into the box through the elastic restoring force of the coil spring. When the measuring tape structure is applied to the clean room module a, the curtain 4 can be opened and closed by controlling the electric roller 1. The winding structure used in electrical appliances such as irons or vacuum cleaners in the prior art is also a retractable wire box 6, which can also be applied to this patent.

[0076] In this embodiment, the telescopic wire box 6 always tends to retract the cable 8. When the electric roller 1 has no power input or the power input is small, the telescopic wire box 6 pulls the curtain 4 downward to close the window 3. On the contrary, when the electric roller 1 is driven to roll up and pull the curtain 4 upward, the window 3 can be opened or the opening degree of the window 3 can be controlled. However, it is worth mentioning that in this patent, the positions of the electric roller 1 and the telescopic wire box 6 are not limited. That is to say, by changing the position, the window 3 can be closed by the electric roller 1 and the window 3 can be opened by the telescopic wire box 6.

[0077] As an optional solution, the clean room module a may also include: a bottom rod 2, the bottom rod 2 is arranged on the curtain 4, and the curtain 4 is connected to the telescopic wire box 6 through the bottom rod 2. Since the telescopic wire box 6 is provided and the power for pulling the curtain 4 in the opposite direction of the electric roller 1 is provided through the telescopic wire box 6, the present patent may not provide the bottom rod 2, or provide a lighter bottom rod 2 with less weight. For example, in an embodiment of the present patent, the weight of the bottom rod 2 may be less than 100g, the thickness may be less than or equal to 5mm, and it may be made of a thin metal plate. The provision of the bottom rod 2 can make the flexible curtain 4 move more smoothly when being pulled, and in order to ensure the uniformity of the force on the curtain 4, two telescopic wire boxes 6 may be provided and connected to both sides of the curtain 4 respectively.

[0078] Optionally, in order to improve the sealing performance, the clean room module a may further include: two sealing strips 9, which are respectively arranged on opposite sides of the window frame, and the two sides of the curtain 4 are respectively embedded in the two sealing strips 9 to move along the length direction of the sealing strips 9. The sealing strips 9 are often made of rubber material, and the provision of the sealing strips 9 can ensure the airtightness of the clean room module a. At the same time, Figure 5 As shown in , the bottom rod 2 can be set at the two side edges of the bottom of the curtain 4 to maintain the lateral rigidity of the curtain 4 so that it can be aligned with the sealing strip 9 to better achieve sealing when the window 3 is closed. However, the provision of the sealing strip 9 will also bring greater resistance to the movement of the curtain 4. In the prior art, it is precisely to overcome this resistance that a larger bottom rod 2 is required. If the bottom rod 2 is set to a smaller size, it is difficult to install a sealing strip 9 with sufficient sealing performance. In this patent, since a telescopic wire box 6 is provided to provide a sufficiently large pulling force for the curtain 4, it can be combined with a sealing strip 9 with better sealing performance to provide better airtightness.

[0079] Compared with the prior art, the present invention uses a telescopic wire box 6 to provide traction for the curtain 4, so there is no need to set a large bottom rod 2 between the two clean room modules a. Therefore, the distance between the guide rails 5 between the two clean room modules a can be smaller. This enables the carrier to pass through the guide rails 5 more smoothly and stably transfer between the two clean room modules a.

[0080] Second embodiment

[0081] In the first embodiment, the telescopic wire box 6 in the prior art is directly used. However, the cables of the telescopic wire box 6 always tend to pull back the curtain 4. In order to keep the window 3 open, the electric roller 1 needs to always output a traction force greater than or equal to the pulling force of the telescopic wire box 6. This will increase the energy consumption of the system and shorten the service life of the electric roller 1.

[0082] In view of this, the second embodiment of the present invention also proposes a clean room module and a sealing device thereof. Compared with the first embodiment, the second embodiment makes further improvements on the telescopic box 6. The main improvement is that, see Figure 6 As shown, the telescopic wire box 6 includes a box body 61, a coil spring 62, a rotating disk 63 and a self-locking structure 7;

[0083] The turntable 63 is connected to the box body 61 via a rotating shaft so as to be able to rotate relative to the box body 61;

[0084] The coil spring 62 is respectively connected to the turntable 63 and the cable 8 and is contained in the box body 61 to pull back the cable 8 by its own elastic force. The cable 8 is wound around the turntable 63;

[0085] The self-locking structure 7 acts on the turntable 63 and is used to unidirectionally lock the turntable 63 to stop the retracting movement of the cable 8 in the direction toward the box body 61;

[0086] The self-locking structure 7 can be unlocked.

[0087] The term "acting on" in this patent refers to the ability to exert force on the object being acted on. This includes but is not limited to the situation where there is a physical connection between the two, so that force is transmitted through contact. In fact, it is also feasible to use electromagnetic action or other possible non-contact transmission technology.

[0088] exist Figure 6 In the figure, the coil spring 62 is blocked by the turntable 63 and is therefore indicated in dashed lines. As can be seen from the figure, the cable 8 connected thereto can be pulled by the elastic restoring force of the coil spring 62, so that the cable 8 is pulled back into the box body 61. However, since the cable 8 is wound on the turntable 63, and the turntable 63, the cable 8 and the coil spring 62 are connected, the turntable 63 will rotate so that the cable 8 is continuously wound on the turntable 63, thereby storing the cable 8.

[0089] Compared with the first embodiment, the present embodiment makes the telescopic movement of the cable 8 controllable by the self-locking structure 7 acting on the turntable 63. Therefore, the self-locking structure 7 can avoid the energy consumption and life problems caused by the electric drum 1 always outputting traction. This can significantly improve the reliability of the system and extend the service life.

[0090] The self-locking structure 7 can be realized in two ways: active and passive. This embodiment provides an example of an active self-locking structure 7.

[0091] Still see Figure 6 As shown. The self-locking structure 7 includes:

[0092] The ratchet wheel 71 is coaxially arranged with the rotating disk 63;

[0093] The pawl 72 is configured to cooperate with the ratchet wheel 71 .

[0094] The driver 74 is connected to the pawl 72 , and is used to drive the pawl 72 to move closer to or away from the ratchet wheel 71 , so as to lock the rotating disk 63 through the ratchet wheel 71 , or to unlock the rotating disk 63 .

[0095] by Figure 6 For example, when the cable 8 is pulled out, the coil spring 62 is tightened, and the ratchet 71 rotates counterclockwise. At this time, the pawl 72 does not hinder the rotation of the ratchet 71. When the cable 8 stops being pulled out, the ratchet 71 is blocked by the pawl 72 and cannot rotate clockwise, so the coil spring 62 cannot return to a relaxed state, and the elastic potential energy is still stored in it. Under this premise, the cable 8 will not shrink, so the electric roller 1 can keep the curtain 4 in a variety of possible positions limited by the tooth pitch of the ratchet 71 without inputting power. In other words, the window 3 can basically be kept at any opening range, which is very free.

[0096] When the window 3 needs to be closed, the driver 74 can be used to move the pawl 72 along the Figure 6 This will release the elastic potential energy of the coil spring 62 and drive the ratchet 71 to rotate clockwise. At this time, the cable 8 will be pulled into the box body 61 and wound around the rotating disk 63 to complete the storage action.

[0097] It is worth mentioning that in this patent, the pawl 72 can have a variety of possible shapes, as long as it can match the shape of the ratchet 71. The driver 74 can also have a variety of possible forms, for example, the pawl 72 can be driven to move by a motor or a micro gas rod. The motor is the most convenient and feasible solution, but the cost is slightly higher. When the clean room module a itself needs pneumatic operation and has an air source, the cost of using a micro gas rod to drive the pawl 72 will be lower.

[0098] When the self-locking structure 7 is driven in an active manner, a signal needs to be input to the self-locking structure 7 to realize the control of the self-locking structure 7, so a controller needs to be set. The controller can be a microcontroller unit (MCU), a programmable logic controller (PLC), or even a host computer, etc. It can be understood that in this patent, the controller can be separately set in each clean room module a to independently control the self-locking structure 7 in the clean room module a. At this time, the clean room module a includes a controller. Alternatively, the controller can also be set in a control hub outside the clean room module a to comprehensively control all clean room modules a in the venue.

[0099] Third embodiment

[0100] The inventor of this patent found that the use of gas rod drive requires a gas source and is not very versatile. The cost of using a miniaturized motor drive is high and the motor stroke control is also more complicated. In view of this, the third embodiment of this patent proposes a clean room module and its sealing device. The third embodiment is a further improvement on the second embodiment, and its main improvement is that, see Figure 7 As shown, the driver 74 includes:

[0101] The spring 741 presses against the pawl 72 so that the pawl 72 tends to press against the ratchet wheel 71;

[0102] The electromagnetic valve 742 acts on the pawl 72 . When the electromagnetic valve 742 is energized, it pulls the pawl 72 away from the ratchet wheel 71 to release the lock on the rotating disk 63 .

[0103] The spring 741 mentioned in this patent includes but is not limited to a spiral spring 741 or a spring 741 in the form of a leaf spring, as long as it can push the pawl 72 to move toward the ratchet 71. With the help of the spring 741, the pawl 72 always tends to stick to the ratchet 71, which can effectively prevent the ratchet 71 from slipping. The solenoid valve 742 can use electromagnetic force to temporarily drive the pawl 72 away from the ratchet 71 to release the coil spring 62.

[0104] Compared with the motor drive, the electromagnetic valve 742 is used to drive the ratchet 72, which has a simpler structure, easier control and lower cost. Compared with the gas rod drive, the electromagnetic valve 742 is not restricted by the environment and has excellent versatility. More importantly, the electromagnetic valve 742 is very small in size, which is very conducive to the miniaturization of the self-locking structure 7.

[0105] Fourth embodiment

[0106] The fourth embodiment of the present invention proposes a clean room module and a sealing device thereof. The fourth embodiment is substantially the same as the second and third embodiments, and the main difference is that in the second and third embodiments, an active self-locking structure 7 is mainly used, while in the present embodiment, a passive self-locking structure 7 is used.

[0107] When a passive self-locking structure 7 is used, it is difficult to actively control the locking and releasing of the self-locking structure 7 due to the lack of power input. Therefore, the locking or unlocking of the self-locking structure 7 can be achieved by mechanical structural design in conjunction with the pulling operation of the cable 8.

[0108] In this embodiment, the self-locking structure 7 acts on the turntable 63 to unidirectionally lock the turntable 63 to stop the movement of the cable 8 toward the box body 61 when the cable 8 is pulled out and released for the first time;

[0109] The self-locking structure 7 is also used to release the lock when the cable 8 is pulled out for the second time.

[0110] Specifically, see Figure 8 As shown, the self-locking structure 7 includes:

[0111] The self-locking track 75 and the limiting cavity 73 are respectively arranged on the rotating disk 63 and the box body 61; the ball 755 is arranged in the limiting cavity 73 and connected to the self-locking track 75;

[0112] The corresponding relationship between the limiting cavity 73 and the self-locking track 75 means that the ball 755 can roll in the self-locking track 75 under the restriction of the limiting cavity 73 .

[0113] The self-locking track 75 includes an inner ring track 751, an outer ring track 752, a first guide channel 753 and a second guide channel 754;

[0114] The first guide channel 753 connects the inner ring track 751 and the outer ring track 752;

[0115] For the sake of convenience, in Figure 8 and Fig. 9 In the embodiment, the coil spring 62 is omitted, but the limit cavity 73 is indicated by a dotted line. Fig. 9 As shown, the inner ring track 751 has a starting position 7511, the outer ring track 752 has a terminal position 7521, the second guide channel 754 is unidirectionally connected from the terminal position 7521 to the starting position 7511, and a stop wall 7541 is provided in the second guide channel 754;

[0116] When the cable 8 is pulled out from the initial position, the turntable 63 rotates in the first direction, and the ball 755 moves along the starting position 7511, the inner ring track 751, the first guide channel 753 to the outer ring track 752 under the restriction of the limit cavity 73; Figure 8 and Fig. 9 In the first direction, the first direction is counterclockwise;

[0117] When the cable 8 is released for the first time, the turntable 63 is driven by the coil spring 62 to rotate in the second direction so that the ball 755 enters the second guide channel 754 from the end position 7521 and abuts against the stop wall 7541 to lock the turntable 63. Figure 8 and Fig. 9 , the second direction is clockwise;

[0118] When the cable 8 is pulled out for the second time, the turntable 63 rotates in the first direction, and the ball 755 continues to move along the second guide channel 754 to the starting position 7511 under the restriction of the limiting cavity 73;

[0119] When the cable 8 is released for the second time, the turntable 63 is driven by the coil spring 62 to rotate in the second direction, so that the ball 755 moves in the inner ring track 751 until the cable 8 contracts and returns to the initial position.

[0120] exist Figure 8 and Fig. 9 In the embodiment, the self-locking track 75 is located on the rotating disk 63, and the limiting cavity 73 is arranged on the inner surface of the box body 61 covering the rotating disk 63. Obviously, the limiting cavity 73 can also be located on the rotating disk 63, and the self-locking track 75 is arranged on the box body 61, which does not affect the relative motion relationship between the two. When the rotating disk 63 rotates, the ball 755 can roll in the self-locking track 75 under the restriction of the limiting cavity 73, so that its position in the self-locking track 75 is constantly changed.

[0121] Obviously, the one-way design of the second guide channel 754 is the key to realize the locking control of the self-locking structure 7. The second guide channel 754 can have several structures to achieve the technical purpose, such as realizing one-way guidance by setting a one-way door. As a further preferred technical solution of this patent, one-way guidance can be realized by setting a height difference.

[0122] Under this premise, the height of the end position 7521 can be made higher than the start position 7511. Fig. 9 As shown, at this time, the second guide channel 754 includes:

[0123] A first guide wall 7542, one side of which is connected to the outer ring track 752 and divides the outer ring track 752 into two parts with different heights, and the other side of the first guide wall 7542 is connected to the stop wall 7541;

[0124] The second guide wall 7543 is set at an angle to the first guide wall 7542. One side of the second guide wall 7543 is connected to the inner ring track 751, and the other side is connected to the stop wall 7541. The height of the path guided by the second guide wall 7543 is lower than the height of the path guided by the first guide wall 7542.

[0125] Preferably, the angle between the second guide wall 7543 and the first guide wall 7542 is an acute angle.

[0126] Also optionally, the first guide channel 753 may also include:

[0127] The third guide wall 7531 is connected to the inner ring track 751 and divides the inner ring track 751 into two parts with different heights to guide the balls 755 from the inner ring track 751 to the outer ring track 752.

[0128] The one-way movement of the ball 755 is achieved by adopting a height difference, which has the advantage of simple structure compared to the method of adding a one-way door. During production, the box body 61 and the turntable 63 can be made by a one-time molding process, which is more cost-effective.

[0129] by Figure 8 , Fig. 9 In the actual use, the self-locking structure 7 operates according to the following rules:

[0130] 1. When the cable 8 is pulled out from the initial position, the turntable 63 rotates counterclockwise. At this time, the ball 755 moves along the starting position 7511, the inner ring track 751, and the first guide channel 753 in sequence under the restriction of the limit cavity 73. When the turntable 63 is used as a reference, the ball 755 is equivalent to moving in the clockwise direction in the inner ring track 751. When moving to the first guide channel 753, due to the height difference of the third guide wall 7531, the ball 755 will not be able to continue to move along the inner ring track 751, and it will enter the outer ring track 752 through the guidance of the first guide channel 753.

[0131] 2. The cable 8 continues to be pulled out, and the turntable 63 still rotates in the counterclockwise direction. When the turntable 63 is used as a reference, the ball 755 is equivalent to moving in the outer ring track 752 in the clockwise direction. Since the first guide wall 7542 of the second guide channel 754 descends from a high position to a low position in the clockwise direction, it will not form any obstruction to the movement of the ball 755. In this process, according to the length of the cable 8, the ball 755 can go around any number of circles in the outer ring track 752 until the cable 8 is completely pulled out.

[0132] 3. When the cable 8 is pulled out to any length, it can be released. When the cable 8 is released, the elastic potential energy of the coil spring 62 is released, causing the turntable 63 to rotate in the clockwise direction. When the turntable 63 is used as a reference, the ball 755 is equivalent to moving in the outer ring track 752 in the counterclockwise direction until it moves to the end position 7521. At the end position 7521, the ball 755 will be blocked by the first guide wall 7542 and enter the second guide channel 754. Since the first guide wall 7542 and the second guide wall 7543 are respectively connected to the two sides of the stop wall 7541 and the two are arranged at an angle, the stop wall 7541 will block the continued movement of the ball 755, which will prevent the cable 8 from being pulled back further, so that the turntable 63 can be locked.

[0133] 4. Continue to pull out a small section of cable 8, and the ball 755 will continue to return to the inner ring track 751 along the second guide channel 754 due to the height difference.

[0134] 5. Release the cable 8, so that the elastic potential energy of the coil spring 62 is released. The turntable 63 will move in the clockwise direction. When the turntable 63 is used as a reference, the ball 755 is equivalent to moving in the counterclockwise direction in the inner ring track 751. Still due to the existence of the height difference, the ball 755 will not enter the first guide channel 753 or the second guide channel 754, but will only rotate continuously in the inner ring track 751 until the cable 8 is completely pulled back into the self-locking structure 7 by the coil spring 62.

[0135] The above-mentioned self-locking structure 7 eliminates the need to set a power source in the self-locking structure 7. This greatly reduces the cost of the telescopic cable box 6 and further increases the reliability. It is easy to understand that the passive self-locking structure 7 can also be converted to other possible similar structures in the prior art. In this patent, there are no excessive restrictions on the specific feasible methods of the self-locking structure 7.

[0136] Finally, it should be noted that ordinary technicians in this field can understand that in order to make readers better understand this patent, the implementation methods of this patent propose many technical details. However, even without these technical details and various changes and modifications based on the above-mentioned implementation methods, the technical solutions claimed for protection by the claims of this patent can be basically realized. Therefore, in practical applications, various changes can be made to the above-mentioned implementation methods in form and details without departing from the spirit and scope of this patent.

Claims

1. A sealing device for a clean room module, mounted on a window of the clean room module, characterized in that: include: Curtains, electric rollers and telescopic boxes, One end of the curtain is connected to the cable of the telescopic wire box, and the other end is connected to the electric roller; The retractable wire box tends to retract the cable, pulling the curtain toward the direction of the retractable wire box; and The electric roller is used to pull the curtain in a direction away from the telescopic wire box.

2. The sealing device of the clean room module according to claim 1, characterized in that: Also includes: Two sealing strips are respectively arranged on opposite sides of the window frame, and the two sides of the curtain are respectively embedded in the two sealing strips to move along the length direction of the sealing strips.

3. The sealing device of the clean room module according to claim 1, characterized in that: The telescopic wire box comprises a box body, a coil spring, a rotating disk and a self-locking structure; The turntable is connected to the box body via a rotating shaft so as to be rotatable relative to the box body; The coil spring is respectively connected to the turntable and the cable and is contained in the box body so as to use its own elastic force to pull back the cable, which is wound around the turntable; The self-locking structure acts on the turntable and is used to unidirectionally lock the turntable to stop the retracting movement of the cable toward the box body; as well as The self-locking structure can be unlocked.

4. The sealing device of the clean room module according to claim 3, characterized in that: The self-locking structure comprises: A ratchet wheel is coaxially arranged with the rotating disk; a pawl, arranged in cooperation with the ratchet wheel; and A driver is connected to the pawl, and is used for driving the pawl to move closer to or away from the ratchet wheel, so as to lock or unlock the rotating disk through the ratchet wheel.

5. The sealing device of the clean room module according to claim 4, characterized in that the drive include: a spring, pressing against the pawl so that the pawl tends to press against the ratchet wheel; as well as The electromagnetic valve acts on the ratchet pawl. When the electromagnetic valve is energized, the ratchet pawl is pulled away from the ratchet wheel to release the lock on the rotating disk.

6. The sealing device of the clean room module according to claim 3, characterized in that: The self-locking structure acts on the turntable to unidirectionally lock the turntable to stop the movement of the cable toward the box body when the cable is pulled out and released for the first time; and The self-locking structure is also used to release the lock of the turntable when the cable is pulled out for the second time.

7. The sealing device of the clean room module according to claim 6, characterized in that: The self-locking structure comprises: A self-locking track and a limiting cavity, which are respectively arranged on the turntable and the box body; and A ball, arranged in the limiting cavity and connected to the self-locking track; The self-locking track comprises an inner ring track, an outer ring track, a first guide channel and a second guide channel; The first guide channel connects the inner ring track and the outer ring track; The inner ring track has a starting position, the outer ring track has a terminating position, the second guide channel is unidirectionally connected from the terminating position to the starting position, and a stop wall is arranged in the second guide channel; When the cable is pulled out from the initial position, the turntable rotates in the first direction, and the ball moves in sequence along the starting position, the inner ring track, and the first guide channel to the outer ring track under the restriction of the limiting cavity; When the cable is released for the first time, the turntable is driven by the coil spring to rotate in the second direction so that the ball enters the second guide channel from the end position and abuts against the stop wall to lock the turntable; When the cable is pulled out for the second time, the turntable rotates in the first direction, and the ball continues to move along the second guide channel to the starting position under the restriction of the limiting cavity; When the cable is released for the second time, the turntable is driven by the coil spring to rotate in the second direction, so that the ball moves in the inner ring track until the cable contracts and returns to the initial position.

8. The sealing device of the clean room module according to claim 7, characterized in that: The height of the end position is higher than the start position; as well as The second guiding channel comprises: A first guide wall, one side of which is connected to the outer ring track and divides the outer ring track into two parts with different heights, and the other side of the first guide wall is connected to the stop wall; and The second guide wall is set at an angle with the first guide wall, one side of the second guide wall is connected to the inner ring track, and the other side is connected to the stop wall, and the height of the path guided by the second guide wall is lower than the height of the path guided by the first guide wall.

9. The sealing device of the clean room module according to claim 7, characterized in that: The first guiding channel comprises: The third guide wall is connected to the inner ring track and divides the inner ring track into two parts with different heights so as to guide the balls from the inner ring track to the outer ring track.

10. The sealing device of the clean room module according to claim 1, characterized in that: Also includes: A bottom rod, the bottom rod is arranged on the curtain, the curtain is connected to the telescopic wire box through the bottom rod, the weight of the bottom rod is less than 100g, and the thickness is less than or equal to 5mm; There are two telescopic wire boxes, which are respectively connected to two sides of the curtain.

11. A clean room module, characterized in that: The clean room module has a window, and the window is used to dock with the window of other clean room modules; the window is provided with the sealing device according to any one of claims 1 to 10.

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