A foot-operated door opening device and door linkage system

Abstract

The utility model provides a kind of foot-operated door opening device and door linkage system, belong to the technical field of door control auxiliary equipment, the foot-operated door opening device includes foot-operated assembly, mechanical lock piece, first connecting rod component, electric self-locking piece and electric door opening component, the foot-operated assembly includes pedal, first reset spring located in the bottom of the pedal, rebound switch on the pedal;The mechanical lock piece includes first fixed seat and first lock block;The first connecting rod component is connected between the lock block and the pedal, for driving the first lock block switches between the first state and the second state;The electric self-locking piece has second fixed seat, second lock block, and the first drive mechanism is drivingly connected with the second lock block, and the first drive mechanism is electrically connected with the rebound switch;The electric door opening component is used to drive door to open, and the electric door opening component is electrically connected with the rebound switch.

Description

Technical Field

[0001] This utility model belongs to the technical field of door control auxiliary equipment, specifically relating to a foot-operated door opening device and door linkage system. Background Technology

[0002] In biopharmaceutical operating rooms, laboratory personnel must strictly adhere to aseptic techniques. Hands must be disinfected (e.g., by wiping with alcohol) or sterile gloves must be worn. If traditional manual door opening is used, direct contact with the door handle may transfer contaminants to it, which can then be transferred to other personnel opening the door, creating a chain of cross-infection. Manual door opening can also lead to glove contamination, which can then contaminate experimental samples, culture media, or bioreactors, affecting the reliability of experimental results. Furthermore, when entering and exiting the laboratory, personnel may need to carry experimental items. If the door is opened manually, the items must be put down before opening the door, but some items cannot touch the ground or may be damaged when being put down or picked up. Under these circumstances, manual door opening devices cannot be used in this scenario.

[0003] Currently, all biopharmaceutical operating rooms use electric doors for personnel entry and exit. Electric doors do not require manual operation. However, biopharmaceutical operating rooms need to meet certain pressure conditions. Under pressure, the electric doors may open automatically, and they may also open automatically in the event of a power outage, which is not very reliable. Utility Model Content

[0004] This utility model provides a foot-operated door opening device and door linkage system, aiming to solve the technical problems of existing electric doors that rely on electricity and have low reliability.

[0005] In a first aspect, embodiments of the present invention provide a foot-operated door opening device, comprising:

[0006] The foot pedal assembly includes a pedal, a first return spring located at the bottom of the pedal, and a rebound switch located on the pedal;

[0007] A mechanical locking component includes a first fixed base and a first locking block, wherein the first locking block has a first state of engaging with the first fixed base and a second state of being separated from the first fixed base;

[0008] A first linkage assembly is connected between the locking block and the pedal, and is used to drive the first locking block to switch between the first state and the second state;

[0009] An electric self-locking component has a second fixed base, a second locking block, and a first drive mechanism that is pulsatorically connected to the second locking block. The second locking block has a third state in which it engages with the second fixed base and a fourth state in which it is separated from the second fixed base. The first drive mechanism is used to drive the second locking block to switch between the third state and the fourth state. The first drive mechanism is electrically connected to the spring-loaded switch.

[0010] An electric door opening assembly is used to open the door, and the electric door opening assembly is electrically connected to the spring-loaded switch;

[0011] When the pedal is pressed, the first return spring is compressed, the first linkage assembly drives the lock block to switch to the second state, the circuit between the rebound switch and the first drive mechanism and the electric door opening assembly is connected, the first drive mechanism drives the second lock block to switch to the fourth state, and the electric door opening assembly opens the door; when the pedal is released, the first return spring resets, the first linkage assembly drives the lock block to switch to the first state, the circuit between the rebound switch and the first drive mechanism and the electric door opening assembly is disconnected, the first drive mechanism drives the second lock block to switch to the third state, and the electric door opening assembly closes the door.

[0012] In conjunction with the first aspect, in one possible implementation, the first linkage assembly includes a shaft on which a gear is fixed, and the first locking block is provided with a rack that meshes with the gear;

[0013] The first fixed base is provided with a first locking groove, and the first locking block is slidably engaged with the first locking groove;

[0014] The first state is when the first locking block engages with the first locking groove, and the second state is when the first locking block slides out of the first locking groove.

[0015] In conjunction with the first aspect, in one possible implementation, the first linkage assembly further includes:

[0016] The first connecting plate is fixedly connected to the rotating shaft;

[0017] A first fixing plate is provided corresponding to the first connecting plate;

[0018] The second return spring is connected between the first connecting plate and the first fixing plate;

[0019] A connecting rod, one end of which is connected to the first connecting plate, and the other end of which is connected to the pedal;

[0020] The second reset spring is used to pull the first connecting plate so that the rotating shaft drives the first locking block to slide out of the first locking groove.

[0021] In conjunction with the first aspect, in one possible implementation, the first locking block has a wedge-shaped portion at one end facing the first locking groove, the wedge-shaped portion being used to extend into the first locking groove and cooperate with the first locking groove.

[0022] In conjunction with the first aspect, in one possible implementation, the foot pedal component further includes:

[0023] Second fixing plate;

[0024] The second connecting plate is rotatably connected to the second fixed plate, and the second connecting plate is connected to the pedal.

[0025] A third return spring is connected between the second connecting plate and the second fixing plate;

[0026] The third reset spring is used to drive the second connecting plate to lift the pedal.

[0027] In conjunction with the first aspect, in one possible implementation, the pedal has an extension on the side facing the second connecting plate, the extension is rotatably connected to the second connecting plate, and the extension has a plurality of rotatable mounting positions for hinged to a fixed shaft in the wall.

[0028] In conjunction with the first aspect, in one possible implementation, the foot-operated switch device further includes a locking seat, the bottom end of the first reset spring being fixed to the locking seat, and the top end abutting against the bottom of the pedal.

[0029] In conjunction with the first aspect, in one possible implementation, the first driving mechanism is a controller, and multiple second fixed seats and multiple second locking blocks are provided, corresponding one to one. The second locking block includes a motor and a locking tongue, and the controller is communicatively connected to the motors in the multiple second locking blocks.

[0030] In conjunction with the first aspect, in one possible implementation, the electric door opening assembly includes:

[0031] The main unit has a rotating head;

[0032] The second linkage assembly has its drive end connected to the rotary head via a transmission connection.

[0033] The third fixed seat is fixed to the door and rotatably connected to the transmission end of the second linkage assembly.

[0034] Compared with the prior art, the solution shown in this application embodiment, by setting a rebound switch on the pedal, allows the mechanical lock and the electric self-locking device to be opened simultaneously by the pedal. The mechanical lock and the electric self-locking device achieve double locking of the door. Even in the event of a power failure, the electric self-locking device will automatically open, and the mechanical lock can still lock the door. The double protection is more reliable. Furthermore, the simultaneous opening of the mechanical lock and the electric self-locking device by the pedal is quick and simple to operate, without the need for two separate unlocking steps, and the response is rapid.

[0035] Secondly, this utility model embodiment also provides a door linkage system, including at least two of the above-mentioned foot-operated door opening devices, wherein the electric self-locking components in the plurality of foot-operated door opening devices are interconnected, and when the electric self-locking component in one of the foot-operated door opening devices is in the open state, the electric self-locking components in the remaining foot-operated door opening devices are in the locked state.

[0036] The solution shown in this application, compared with the prior art, can link multiple doors by setting up multiple foot-operated door opening devices. For example, in a laboratory, doors A and B are each equipped with a foot-operated door opening device. When door A is opened by the foot-operated door opening device, the foot-operated door opening device on door B recognizes that door A is open, and the electric self-locking component of door B remains locked. Door B can only be opened when door A is closed. Similarly, when three or more doors are linked, as long as one door is open, the others cannot be opened. The above technical solution can control two doors connecting airlock rooms of different cleanliness levels to prevent them from opening simultaneously, thereby reducing the risk of cross-contamination. Attached Figure Description

[0037] Figure 1 A three-dimensional structural diagram of the foot-operated door opening device provided in an embodiment of this utility model;

[0038] Figure 2 This is a three-dimensional structural diagram of the foot pedal component used in an embodiment of the present utility model;

[0039] Figure 3 This is a three-dimensional structural diagram of the mechanical locking component and the first connecting rod assembly used in an embodiment of the present utility model;

[0040] Figure 4 This is a three-dimensional structural diagram of the electric self-locking component used in an embodiment of this utility model;

[0041] Figure 5 This is an exploded structural diagram of the electric door opening assembly used in an embodiment of this utility model.

[0042] Explanation of reference numerals in the attached figures:

[0043] 10-Foot pedal assembly; 11-Pedal; 111-Extension; 112-Rotating mounting position; 12-First return spring; 13-Rebound switch; 14-Second fixing plate; 15-Second connecting plate; 16-Third return spring; 17-Locking seat;

[0044] 20-Mechanical lock component; 21-First fixed seat; 22-First lock block; 221-Wedge-shaped part; 23-Rack; 24-First locking groove;

[0045] 30-First connecting rod assembly; 31-Rotating shaft; 32-Gear; 33-First connecting plate; 34-First fixing plate; 35-Second return spring; 36-Connecting rod; 37-Fourth fixing seat;

[0046] 40 - Electric self-locking component; 41 - Second fixed base; 42 - Second locking block; 421 - Motor; 422 - Lock tongue; 43 - First drive mechanism;

[0047] 50 - Electric door opening assembly; 51 - Main unit; 52 - Second linkage assembly; 53 - Third mounting bracket;

[0048] 60 - Signal line. Detailed Implementation

[0049] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0053] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0054] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0055] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0056] Please refer to the following: Figures 1 to 5 The foot-operated door opening device provided by this utility model will now be described. The foot-operated door opening device includes a foot pedal assembly 10, a mechanical lock 20, a first linkage assembly 30, an electric self-locking component 40, and an electric door opening assembly 50. The foot pedal assembly 10 includes a pedal 11, a first return spring 12 located at the bottom of the pedal 11, and a rebound switch 13 located on the pedal 11. The mechanical lock 20 includes a first fixed base 21 and a first locking block 22. The first locking block 22 has a first state of engaging with the first fixed base 21 and a second state of being separated from the first fixed base 21. The first linkage assembly 30 is connected between the locking block and the pedal 11 and is used to drive the first lock... Block 22 switches between a first state and a second state; the electric self-locking component 40 has a second fixed base 41, a second locking block 42, and a first drive mechanism 43 that is pulsatorically connected to the second locking block 42. The second locking block 42 has a third state that cooperates with the second fixed base 41 and a fourth state that is separated from the second fixed base 41. The first drive mechanism 43 is used to drive the second locking block 42 to switch between the third state and the fourth state. The first drive mechanism 43 is electrically connected to the rebound switch 13; the electric door opening assembly 50 is used to drive the door to open. The electric door opening assembly 50 is electrically connected to the rebound switch 13.

[0057] When the pedal 11 is pressed, the first return spring 12 is compressed, the first linkage assembly 30 drives the lock block to switch to the second state, the circuit between the rebound switch 13, the first drive mechanism 43, and the electric door opening assembly 50 is connected, the first drive mechanism 43 drives the second lock block 42 to switch to the fourth state, and the electric door opening assembly 50 opens the door; when the pedal 11 is released, the first return spring 12 is reset, the first linkage assembly 30 drives the lock block to switch to the first state, the circuit between the rebound switch 13, the first drive mechanism 43, and the electric door opening assembly 50 is disconnected, the first drive mechanism 43 drives the second lock block 42 to switch to the third state, and the electric door opening assembly 50 closes the door.

[0058] To facilitate stepping on the pedal 11, anti-slip textures can be provided on the pedal 11 to ensure that the feet will not slip and improve the safety of use; the foot pedal assembly 10 can be installed outside the wall or near the base of the wall and equipped with a protective shell.

[0059] Specifically, the electrical connection can be achieved using signal wire 60. In actual installation, signal wire 60 is embedded in the wall and connects to the rebound switch 13, the first drive mechanism 43, and the electric door opening assembly 50. Similarly, the foot pedal assembly 10, mechanical lock 20, first linkage assembly 30, electric self-locking component 40, and electric door opening assembly 50 are determined based on actual needs to determine whether they need to be embedded in the wall, exposed, or connected to the door. This part can be considered using a conventional door structure.

[0060] It should be noted that the spring-loaded switch 13 is a commonly used component in this field, a "self-resetting switch," also known as an instantaneous switch. Its working principle is that it conducts when an external force is applied and automatically rebounds immediately after the external force disappears. The spring-loaded switch 13 is electrically connected to the first drive mechanism 43, that is, the spring-loaded switch 13 controls the opening and closing of the first drive mechanism 43, and the same applies to the electric door opening assembly 50.

[0061] The electric door opening component 50 has the same structure and principle as the existing electric door, so it will not be described in detail here. In practical implementation, when the door needs to be opened, the pedal 11 is pressed down, compressing the first return spring 12. The pedal 11, through the first linkage assembly 30, causes the first locking block 22 to disengage from the first fixed seat 21 (second state). Simultaneously, the pedal 11 is pressed down, triggering the rebound switch 13. The rebound switch 13 opens the first drive mechanism 43, which causes the second locking block 42 to disengage from the second fixed seat 41 (fourth state). At the same time, the electric door opening assembly 50 is opened, causing the door to move and open. After the pedal 11 is released, the first return spring 12 causes the pedal 11 to return to its original position. The first linkage assembly 30 causes the first locking block 22 to engage with the first fixed seat 21 (first state). Simultaneously, the rebound switch 13 is closed when the pressure plate is released, closing the first drive mechanism 43 and the electric door opening assembly 50. The second locking block 42 engages with the second fixed seat 41 (third state), and the electric door opening assembly 50 closes the door.

[0062] Compared with the prior art, the foot-operated door opening device provided in this embodiment, by setting a rebound switch 13 on the pedal 11, can simultaneously open the mechanical lock 20 and the electric self-locking component 40 through the pedal 11. The mechanical lock 20 and the electric self-locking component 40 achieve double locking of the door. Even in the event of a power failure, the electric self-locking component 40 will automatically open, and the mechanical lock 20 can still lock the door. The double protection is more reliable. Furthermore, the simultaneous opening of the mechanical lock 20 and the electric self-locking component 40 through the pedal 11 is quick and simple to operate, without the need for two separate unlocking steps, and the response is rapid.

[0063] In some embodiments, a specific implementation of the mechanical locking member 20 described above can be as follows: Figure 1 and Figure 3 The structure shown. See also Figure 1 and Figure 3 The first linkage assembly 30 includes a rotating shaft 31, on which a gear 32 is fixedly mounted, and a rack 23 that meshes with the gear 32 is provided on the first locking block 22; a first locking groove 24 is provided on the first fixed seat 21, and the first locking block 22 is slidably engaged with the first locking groove 24.

[0064] The first locking block 22 is in the first state when it is engaged with the first locking groove 24, and the first locking block 22 is in the second state when it slides out of the first locking groove 24.

[0065] When pedal 11 is pressed, the first linkage assembly 30 drives the rotating shaft 31 to rotate. The gear 32 follows the rotation of the rotating shaft 31, thereby driving the rack 23 to move along its own extension direction. This causes the first locking block 22 to slide out of the first locking groove 24. It is worth noting that the extension direction of the rack 23 is perpendicular to the axial direction of the rotating shaft 31. This structure ensures that the first locking block 22 reacts quickly when pedal 11 is pressed, realizing a rapid switch between the first and second states. Furthermore, the cooperation between the gear 32 and the rack 23 ensures that the movement stroke of the first locking block 22 is precisely controlled.

[0066] In the above embodiment, the first locking block 22 is slidably adjusted to cooperate with the first fixed seat 21; as an alternative implementation, the first locking block 22 can also be rotated by the first connecting rod assembly 30 to cooperate with the first fixed seat 21.

[0067] In some embodiments, an improved implementation of the first linkage assembly 30 described above may employ, as follows: Figure 1 and Figure 3 The structure shown. See also Figure 1 and Figure 3 The first linkage assembly 30 also includes a first connecting plate 33, a first fixing plate 34, and a second return spring 35. The first connecting plate 33 is fixedly connected to the rotating shaft 31; the first fixing plate 34 is correspondingly arranged with the first connecting plate 33; the second return spring 35 is connected between the first connecting plate 33 and the first fixing plate 34; one end of the connecting rod 36 is connected to the first connecting plate 33, and the other end is connected to the pedal 11.

[0068] The second reset spring 35 is used to pull the first connecting plate 33 so that the rotating shaft 31 drives the first locking block 22 to slide out of the first locking groove 24.

[0069] In specific implementation, the first fixing plate 34 is installed in the wall, the first connecting plate 33 is independent of the first fixing plate 34, and a fourth fixing seat 37 for the first connecting plate 33 needs to be installed in the wall. The first connecting plate 33 and the fourth fixing seat 37 are rotatably connected. When the pedal 11 is stepped on, the first linkage assembly 30 pulls the first connecting plate 33 to rotate (not 360°, but swinging within a certain angle range), thereby driving the rotating shaft 31 fixed on the first connecting plate 33 to rotate, realizing the rotation of the gear 32. At this time, the first return spring 12 is compressed. When the pedal 11 is released, the first return spring 12 and the second return spring 35 work together. The first return spring 12 resets the pedal 11, and the second return spring 35 resets the first connecting plate 33, realizing rapid reset, shortening the reset time, and enabling the door to open and close quickly and multiple times in a short period of time.

[0070] In some implementations, a specific embodiment of the first locking block 22 described above can be as follows: Figure 1 and Figure 3 The structure shown. See also Figure 1 and Figure 3 The first locking block 22 has a wedge-shaped portion 221 at one end facing the first locking groove 24. The wedge-shaped portion 221 is used to extend into the first locking groove 24 and cooperate with it. Figure 2 The wedge-shaped portion 221 on the first locking block 22 shown is positioned toward the first locking groove 24. If the first locking block 22 is slightly displaced during use, the tip of the wedge-shaped portion 221 can slide into the first locking groove 24 as long as it is within the range of the first locking groove 24, thus extending its service life.

[0071] In some embodiments, an improved implementation of the foot pedal component 10 may employ, as follows: Figures 1 to 2 The structure shown. See also Figures 1 to 2 The foot pedal assembly 10 also includes a second fixed plate 14, a second connecting plate 15, and a third return spring 16. The second connecting plate 15 is rotatably connected to the second fixed plate 14 and is connected to the pedal 11. The third return spring 16 is connected between the second connecting plate 15 and the second fixed plate 14.

[0072] The third reset spring 16 is used to drive the second connecting plate 15 to lift the pedal 11.

[0073] The second fixing plate 14 can be installed in the corresponding position inside the wall. The second connecting plate 15 is connected to the side of the pedal 11 away from the spring. Utilizing the lever principle, when one end of the pedal 11 is pressed down, the other end is lifted up. The pressed position corresponds to the first return spring 12, and the lifted position corresponds to the second connecting plate 15. Through the joint action of the third return spring 16 and the first return spring 12, the pedal 11 can be quickly reset. Furthermore, even if one of the return springs fails, the reset process of the pedal 11 will not be affected.

[0074] Specifically, the second connecting plate 15 and the second fixing plate 14 can be connected by a rotating shaft, and the third return spring 16 can be a torsion spring sleeved on the rotating shaft.

[0075] In some embodiments, an improved implementation of the pedal 11 described above may employ, as follows: Figures 1 to 2 The structure shown. See also Figures 1 to 2 The pedal 11 has an extension 111 on the side facing the second connecting plate 15. The extension 111 is rotatably connected to the second connecting plate 15. The extension 111 has a plurality of rotating mounting positions 112 for hinged to a fixed shaft in the wall.

[0076] When the pedal 11 is installed, a corresponding fixed shaft needs to be set in the wall. The rotating mounting position 112 corresponds to and is connected to the fixed shaft. The position of the fixed shaft forms the fulcrum of the pedal 11, forming a lever. When the pedal 11 is stepped on, the end of the extension 111 near the second connecting plate 15 is lifted. One of the multiple rotating mounting positions 112 can be rotated and cooperated with the fixed shaft to adjust the height of the pedal 11 so as to conform to the user's body shape during installation.

[0077] The extension 111 extends upward away from the pedal 11, and multiple rotating mounting parts are evenly distributed along the extension direction of the extension 111, thereby realizing the adjustment of the height of the pedal 11.

[0078] In some embodiments, an improved implementation of the above-described foot-operated switch device may employ, as follows: Figures 1 to 2 The structure shown. See also Figures 1 to 2 The foot-operated switch also includes a locking seat 17, with the bottom end of the first return spring 12 fixed to the locking seat 17 and the top end abutting against the bottom of the pedal 11. The locking seat 17 is used to fix the first return spring 12, preventing the first return spring 12 from shifting and affecting the reset process of the pedal 11. Furthermore, by fixing the position of the first return spring 12 through the locking seat 17, the pedal 11 can directly abut against the top of the first return spring 12, simplifying the connection.

[0079] In some embodiments, a specific implementation of the above-described electric self-locking component 40 may employ, as follows: Figure 1 and Figure 4 The structure shown. See also Figure 1 and Figure 4 The first drive mechanism 43 is a controller. There are multiple second fixed bases 41 and multiple second locking blocks 42, and they correspond one to one. The second locking block 42 includes a motor 421 and a locking tongue 422. The controller is communicatively connected to the motors 421 in the multiple second locking blocks 42.

[0080] The number of the second fixed seat 41 and the second locking block 42 depends on the number of doors in the environment. Each door corresponds to one second fixed seat 41 and one second locking block 42, thus enabling simultaneous control.

[0081] It should be noted that when the spring-loaded switch 13 is opened, the controller receives an electrical signal and sends an unlocking command to the motor 421. The motor 421 then starts, causing the locking tongue 422 to move, thus unlocking the device. The communication principle between the controller and the motor 421 is common knowledge in the field and will not be elaborated here.

[0082] Specifically, the motor 421 can drive the locking tongue 422 to rotate to unlock, or the locking tongue 422 can be extended and retracted by installing a gear 32 on the output shaft of the motor 421 and installing a rack 23 on the locking tongue 422 that meshes with the gear 32 to unlock.

[0083] In some embodiments, a specific implementation of the above-described electric door opening assembly 50 may employ, as follows: Figure 1 and Figure 5 The structure shown. See also Figure 1 and Figure 5 The electric door opening assembly 50 includes a main unit 51, a second linkage assembly 52, and a third fixed base 53. The main unit 51 has a rotating head; the driving end of the second linkage assembly 52 is connected to the rotating head; the third fixed base 53 is fixed to the door and is rotatably connected to the driving end of the second linkage assembly 52.

[0084] The rotating head on the main unit 51 drives one end of the second linkage assembly 52 to rotate. Under the action of the mutual linkage, the door slides or rotates, realizing the automatic opening of the door.

[0085] The second linkage assembly 52 includes multiple hinged links, the specific number of which can be selected according to the actual use.

[0086] The door opens automatically by rotating the connecting rod driven by the host 51. This is the same structure and principle as the commonly used electric control door in the prior art, and will not be described in detail here.

[0087] Based on the same inventive concept, this application also provides a door linkage system, including at least two of the above-mentioned foot-operated door opening devices. The electric self-locking components 40 in the multiple foot-operated door opening devices are interconnected. When the electric self-locking component 40 in one of the foot-operated door opening devices is in the open state, the electric self-locking components 40 in the other foot-operated door opening devices are all in the locked state.

[0088] Compared with existing technologies, the door linkage system provided in this application can link multiple doors by setting up multiple foot-operated door opening devices. For example, in a laboratory, doors A and B are each equipped with a foot-operated door opening device. When door A is opened by the foot-operated door opening device, the foot-operated door opening device on door B recognizes that door A is open, and the electric self-locking component 40 of door B remains locked. Door B can only be opened when door A is closed. Similarly, when three or more doors are linked, as long as one door is open, the others cannot be opened. The above technical solution can control two doors connecting airlock rooms of different cleanliness levels to prevent them from opening simultaneously, thereby reducing the risk of cross-contamination.

[0089] In this embodiment of the application, if used with a door closing device sold on the market, the door opening operation can be performed using only the embodiment of this application, while the door closing operation is performed by the inner door closing device.

[0090] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foot operated door opening device characterized by, include: The foot pedal assembly includes a pedal, a first return spring located at the bottom of the pedal, and a rebound switch located on the pedal; A mechanical locking component includes a first fixed base and a first locking block, wherein the first locking block has a first state of engaging with the first fixed base and a second state of being separated from the first fixed base; A first linkage assembly is connected between the locking block and the pedal, and is used to drive the first locking block to switch between the first state and the second state; An electric self-locking component has a second fixed base, a second locking block, and a first drive mechanism that is pulsatorically connected to the second locking block. The second locking block has a third state in which it engages with the second fixed base and a fourth state in which it is separated from the second fixed base. The first drive mechanism is used to drive the second locking block to switch between the third state and the fourth state. The first drive mechanism is electrically connected to the spring-loaded switch. An electric door opening assembly is used to open the door, and the electric door opening assembly is electrically connected to the spring-loaded switch; When the pedal is pressed, the first return spring is compressed, the first linkage assembly drives the lock block to switch to the second state, the circuit between the rebound switch and the first drive mechanism and the electric door opening assembly is connected, the first drive mechanism drives the second lock block to switch to the fourth state, and the electric door opening assembly opens the door; when the pedal is released, the first return spring resets, the first linkage assembly drives the lock block to switch to the first state, the circuit between the rebound switch and the first drive mechanism and the electric door opening assembly is disconnected, the first drive mechanism drives the second lock block to switch to the third state, and the electric door opening assembly closes the door.

2. The foot operated door opening device as recited in claim 1, wherein The first linkage assembly includes a rotating shaft, on which a gear is fixed, and on the first locking block is a rack that meshes with the gear; The first fixed base is provided with a first locking groove, and the first locking block is slidably engaged with the first locking groove; The first state is when the first locking block engages with the first locking groove, and the second state is when the first locking block slides out of the first locking groove.

3. The foot operated door opening apparatus as described in claim 2, wherein, The first link assembly also includes: The first connecting plate is fixedly connected to the rotating shaft; A first fixing plate is provided corresponding to the first connecting plate; The second return spring is connected between the first connecting plate and the first fixing plate; A connecting rod, one end of which is connected to the first connecting plate, and the other end of which is connected to the pedal; The second reset spring is used to pull the first connecting plate so that the rotating shaft drives the first locking block to slide out of the first locking groove.

4. The foot operated door opening apparatus as described in claim 2, wherein, The first locking block has a wedge-shaped portion at one end facing the first locking groove, and the wedge-shaped portion is used to extend into the first locking groove and cooperate with the first locking groove.

5. The foot operated door opening apparatus as recited in claim 1, wherein The foot pedal assembly also includes: Second fixing plate; The second connecting plate is rotatably connected to the second fixed plate, and the second connecting plate is connected to the pedal. A third return spring is connected between the second connecting plate and the second fixing plate; The third reset spring is used to drive the second connecting plate to lift the pedal.

6. The foot operated door opening apparatus as recited in claim 5, wherein The pedal has an extension on the side facing the second connecting plate. The extension is rotatably connected to the second connecting plate. The extension has multiple rotatable mounting positions for hinged connection with a fixed shaft in the wall.

7. The foot-operated door opening device as described in claim 1, characterized in that, The foot-operated door opening device also includes a locking seat, the bottom end of the first return spring is fixed to the locking seat, and the top end abuts against the bottom of the pedal.

8. The foot operated door opening apparatus as described in claim 1, wherein, The first driving mechanism is a controller. Multiple second fixed bases and multiple second locking blocks are provided, and they correspond one-to-one. The second locking block includes a motor and a locking tongue. The controller is communicatively connected to the motors in the multiple second locking blocks.

9. The foot operated door opening apparatus as described in claim 1, wherein, The electric door opening assembly includes: The main unit has a rotating head; The second linkage assembly has its drive end connected to the rotary head via a transmission connection. The third fixed seat is fixed to the door and rotatably connected to the transmission end of the second linkage assembly.

10. A door linkage system characterized by, It includes at least two foot-operated door opening devices as described in any one of claims 1-9, and the electric self-locking components in the plurality of foot-operated door opening devices are interconnected. When the electric self-locking component in one of the foot-operated door opening devices is in the open state, the electric self-locking components in the remaining foot-operated door opening devices are in the locked state.

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