Foot operable door opener

Abstract

The foot operable door opener operates without the use of hands or electrical assistance. Entry is initiated by stepping on the pedal. This force drives the pedal 1 / 4 turn, engaging the soft wheel to open the door. The pedal is hard connected to a crank arm that enters a one way crank axle hub to turn the wheel. Downward pressure from the pedal pivots a ratchet hinge connected to a bracketed spring loaded wheel assembly to maintain constant pressure on the ground. A gear box or multiple pumps of the pedal turn the wheel two or more 360 degree rotations, opening the door to let the entrant through until the foot pedal is released. This action releases the ratchet hinge mechanism, allowing the spring assisted wheel assembly to rotate to its original upward position, releasing the wheel from the ground, thus closing the door.

Description

Technical Field

[0001] This invention relates to a safe, foot-operated door opener to avoid manually touching door handles that may harbor unsanitary pathogens. Foot-operated means using the foot or a cane. The foot-operated door opener can also be used for opening doors without the need for hands, such as for warehouse workers or food service workers carrying heavy food trays in or out. The foot-operated door opener can also serve as a door assist device for people with arm disabilities. Background Technology

[0002] In this age of rampant bacteria and viruses, doorknobs can be a continuous source of bacteria and viruses that can be transmitted to the hands of subsequent users.

[0003] Efforts have been made to provide electrically operated door openers, but their installation and operation are often complex and expensive, requiring electricity, wiring, and sensors.

[0004] Existing technology patents include Shelley's U.S. Patent No. 10,081,977 B2, which discloses a device for automatically and electronically remotely opening and closing doors using a remote control and a counter-rotating wheel.

[0005] Other patents promote a non-motorized bracket for footwear (such as shoes or boots) attached to a door, forcing the user to awkwardly insert the shoe or boot into the non-movable footwear bracket attached to the door. This bracket includes a lower horizontal base plate and a vertical ledge extending upwards from the distal side, thus requiring the user to attempt to open the door using only the leverage of their leg, as described in Michael Sewell's U.S. Patent No. 9,115,530. This is impractical because most doors are designed with standard top-mounted closers, floor closers, or spring hinges with a resistance of 5-10 pounds. Without mechanical advantage, the force required to pivot on a single leg is too great to overcome easily.

[0006] The aforementioned patent does not provide a simple, cost-effective method for opening doors without using hands, without requiring pneumatic or electrical assistance, or without requiring shoe supports or providing mechanical assistance.

[0007] The purpose of this invention

[0008] Therefore, one object of the present invention is to provide a simple and cost-effective door opening device that does not require the use of hands and electrical assistance.

[0009] Another object of the present invention is to provide a convenient and safe door opener that uses only the user's foot on the pedal actuator of the door opener.

[0010] Another object of the present invention is to provide a door opener that has a time delay in both the opening and closing cycles of the door opening process to allow safe entry and exit through the door.

[0011] Another objective is to provide a foot-operated door opener that can be retrofitted to any existing door.

[0012] Other objectives will become apparent from the following description of the invention. Summary of the Invention

[0013] In order to make these and other objectives apparent, the present invention relates to a foot-operated door opener that does not require the use of hands or electrical assistance.

[0014] It is known in the industry as SAFETY MAX TM Door opener.

[0015] In this age of bacteria and viruses, this invention is a simple, cost-effective door opening device that requires no hands and no electrical assistance. The cycle begins by pressing a pedal. This force drives the pedal ¼ turn, engaging the soft wheel to open the door. The pedal is rigidly connected to a crank arm, which engages a one-way crankshaft hub to rotate the wheel. Downward pressure from the pedal causes a ratchet hinge connected to a bracketed, spring-loaded wheel assembly to pivot, maintaining constant pressure on the ground. An acceleration gearbox or multiple pumps in the pedal cause the wheel system to rotate two or more 360-degree turns, fully opening the door to allow entry. When the entrant releases the pedal, this action releases the one-way mechanism, such as a ratchet hinge mechanism or other one-way mechanisms like cams, coils, one-way threaded devices, slides and ways, or rack and pawl mechanisms, to allow the spring-assisted wheel assembly to rotate or slide upwards back to its original upward position, thus releasing the wheel from the ground and allowing the door to close with a standard top-mounted closer or spring-loaded hinge. The door is now ready for the next person to enter.

[0016] The model may also include an optional master spring, which can be wound to provide further assistance to accommodate delayed actuation, at which point a foot-operated spring-loaded wheel descends and participates in the aforementioned opening cycle. As described above, after actuation, the door will close after a delay following the retraction of the spring mechanism. Both opening and closing rely on mechanical advantages, requiring no electricity or motor. This invention differs from all prior art, is unique, novel, and patentable because it is a simple machine that requires no type of electricity, motor, scanner, or traffic reader, maintaining constant pressure with the floor plane through mechanical advantages and a spring-loaded hinge assembly; it allows for hygienic door opening when one desires to completely avoid disease, viruses, bacteria, or other hazards, or when manual operation is not feasible, such as in warehouses or food service, where the risk of tripping or falling is greatly reduced by using an economical device that can be added to / or retrofitted to any type of door (wood, hollow metal, metal-framed glass, all-glass, etc.) to facilitate access for all types, locations, and environments.

[0017] Other alternative embodiments of foot-operated door openers may include an internal latch release mechanism, enabling the door opener to be used with standard latched doors (such as latched doors seen in most residences).

[0018] In a first preferred embodiment, the foot-operated door opener includes a crank assembly comprising a crank arm that rotates from an initial position by pressing a foot pedal or cane to rotate a crankshaft 1.3. A drive assembly is connected to the crank arm via the crankshaft to wind one or more master springs.

[0019] A gear train with a pre-selected speed-up ratio transmits power from the main spring to the drive wheel assembly, which preferably includes a main drive wheel selected from a mechanical durometer main drive wheel or a pneumatic main drive wheel connected to the main drive shaft. The traction tension assembly is actuated by the main crankshaft to rotate the main shaft, thereby swinging the door open.

[0020] Optionally, a delay component is provided to delay the release of potential energy from the main spring to the main drive shaft, allowing the entrant's weight to be safely and ergonomically transferred to their feet, which allows the entrant to comfortably avoid the swinging of the door.

[0021] A return spring is mounted on the aforementioned crankshaft and crank arm to return the crank arm to its original position; and thereby, an entrant can open the door without the use of hands or electrical assistance.

[0022] It includes a safety feature whereby the gear train of the door opener includes a clutch bearing, thereby allowing the gear train to travel in one direction without backlash or backward movement.

[0023] The gear train preferably has an increase ratio of about 1 to 10.

[0024] For safety reasons, the delay assembly of the door opener includes a spring-loaded mechanical damper or cylinder that is compressed by the main crankshaft when the pedal and crank arm are pressed down, such that the cylinder has an opening, such as an orifice or an adjustable needle valve, to allow air to escape from the compression chamber in the mechanical or cylinder. This delay is adjusted to release the potential energy stored from the main spring and to start the rotational cycle of the main drive wheel without losing any potential energy.

[0025] Furthermore, regarding the delay assembly, the aforementioned cylinder has a piston and a spring-loaded plunger, wherein the plunger presses down on a pawl, which engages a one-way mechanical orientation device, such as a ratchet or sleeve, which is directly connected to the aforementioned main drive wheel. Other one-way orientation devices can be used, such as cams, one-way threaded devices, racks, and pawls. The release of pressure within the cylinder causes the spring-loaded plunger to release the ratchet, delaying the release of the potential energy stored in the main spring and initiating the rotational cycle of the main drive wheel without losing any potential energy.

[0026] When the crank arm is depressed, the traction assembly is also actuated, causing the main shaft to rotate. This causes the depressor arm to pull the fork assembly downward, engaging a spring-loaded mechanism held downward by a locking pawl. This locking pawl generates a constant downward pressure over a predetermined stroke to accommodate undercuts under doors, sills, and any ramps in front of them. When the main spring releases at the end of its rotation, the spring-loaded mechanism releases the locking pawl and lifts the locking pawl and main drive wheel back to their rest position when the actuation pin strikes the actuation trigger, preparing for the next cycle.

[0027] The door then closes automatically with the help of at least one of the following: a standard spring-loaded or gravity hinge, a top-closing mechanism, and a floor-closing mechanism (which is standard on all operating entrance doors, or can be added to the interior of doors that are not normally equipped with this mechanism).

[0028] Optionally, the drive wheel assembly is connected to the crank arm via a set of wire ropes wound around a drum, whereby when the pedal and crank arm are pressed down, the wire ropes rotate the drum to wind the master spring. Optionally, the master springs are either left-handed or right-handed.

[0029] For stability, a chassis is installed on the door, which basically houses all the operating elements of the door opener.

[0030] In a preferred first embodiment, the invention further includes a method for constructing and using a foot-operable door opener, the method comprising the following steps:

[0031] a) Provides a crank assembly including a crank arm that rotates from its original position by pressing down a foot pedal for rotating the crankshaft;

[0032] b) Provide a cable assembly connected to the crank arm via the transmission shaft to wind one or more master springs;

[0033] A drive assembly is provided, which is connected to a transmission shaft connected to the gear train;

[0034] c) Provide a gear train with a preselected speed ratio for transmitting power from the main spring to the drive wheel assembly; wherein the drive wheel assembly includes a hardness gauge main drive wheel connected to the main drive shaft;

[0035] d) Alternatively, a crank assembly and crankshaft are provided, which rotate a gear powertrain at an increase ratio of approximately 1-10, the gear powertrain winding one or more master springs and supplying master springs to the drive wheel assembly. The drive wheel assembly thus includes a hardness gauge master drive wheel connected to the master drive shaft;

[0036] e) The traction tension assembly is actuated via the crankshaft to rotate the drive shaft for swinging to open the door;

[0037] f) Provide a delay component for delaying the release of the potential energy of the main spring to the main drive shaft to allow the weight of the entrant to be safely and ergonomically transferred to the feet, thereby allowing the entrant to comfortably avoid the swing of the door;

[0038] g) Provide a return spring mounted on the crankshaft for returning the crank arm to its initial position;

[0039] h) The step of an entrant opening the door using the door opener without using hand or electrical assistance;

[0040] i) Provide bracket assemblies to accommodate all relevant mechanisms and the aforementioned relationships;

[0041] j) A hole is provided in the bracket to facilitate securing the door opening to a new or existing door;

[0042] k) Provide a clamping subplate mounting system that surrounds the bottom and edges of the door to facilitate the installation of the door opener on any door without penetrating, drilling, or causing any damage to existing glass, metal, wood, or fiberglass doors;

[0043] l) Provides an ergonomically designed cover to protect the door opener from weather, dust, and environmental conditions; and

[0044] m) provides the cover to protect, prevent and prevent pedestrians from being entangled or tripped by the door opener.

[0045] A method for opening a foot-operated door opener without electrical assistance also includes an optional step of providing a gear train, which includes a clutch bearing, to allow the gear train to travel in one direction without backlash or backward movement.

[0046] Preferably, the gear train has an increase ratio of about 1 to 10.

[0047] The method also includes a delay component step having a spring-loaded mechanical or pneumatic cylinder that is compressed by the main crankshaft when the pedal and crank arm are pressed down, and wherein the mechanical or pneumatic cylinder has an opening (e.g., a fixed orifice or an adjustable needle valve) to allow air to escape from the compression chamber in the cylinder or damper, thereby regulating the delayed release of stored potential energy from the main spring and initiating the rotational cycle of the main drive wheel without losing any potential energy.

[0048] Alternatively, the method may include a friction clutch to constrain the drive wheel for a fixed or variable duration, or include a damper, such as a damping pot cylinder, to mechanically adjust the pressure of a spring-loaded plunger against a ratchet engaged with a ratchet, the ratchet itself being directly connected to the aforementioned main drive wheel. The release of pressure within the cylinder causes the spring-loaded plunger to release the ratchet, delaying the release of the potential energy stored in the main spring and initiating the rotational cycle of the main drive wheel without losing any potential energy.

[0049] The method also includes a mechanical or pneumatic cylinder with a piston and a spring-loaded plunger, wherein the spring-loaded plunger presses down on a pawl engaged with a ratchet, which is directly connected to the aforementioned main drive wheel. The release of pressure within the cylinder causes the spring-loaded plunger to release the ratchet, delaying the release of the potential energy stored in the main spring, and initiating the rotational cycle of the main drive wheel without losing any potential energy.

[0050] Optionally, the method further includes a mechanical cylinder or damping cylinder having a piston and a spring-loaded plunger, wherein the spring-loaded plunger presses down on a pawl engaged with a ratchet, which is directly connected to the aforementioned main drive wheel, thereby releasing the pressure inside the cylinder causing the spring-loaded plunger to release the ratchet, delaying the release of the potential energy stored in the main spring, and initiating the rotational cycle of the main drive wheel without losing any potential energy.

[0051] Optionally, the method further includes the following steps: when the crank arm is pressed down, the traction assembly is also actuated to rotate the crankshaft, which causes the pressing arm to pull the support arm down to engage the spring-loaded mechanism held down by the locking pawl, generating a constant downward pressure over a predetermined length of stroke to accommodate undercuts under the door, sill, and any ramp in front of the door.

[0052] The method for opening the foot-operated door opener also includes the following steps: when the main spring is released at the end of its rotation, the actuating pin strikes the actuating trigger, thereby releasing the locking pawl, closing the spring-loaded mechanism, raising the main drive wheel 5.1 back to the stationary position, and preparing for the next cycle.

[0053] Optionally, the method also includes a time delay for a predetermined or variable duration before the main drive wheel 5.1 is raised back to its original position and ready for the next cycle.

[0054] The method also includes the step of connecting the drive wheel assembly to a gear train connected to a transmission shaft, wherein the crank arm has a set of wire ropes wound on a drum, whereby when the pedal and crank arm are pressed down, the wire ropes rotate the drum and the transmission shaft to wind the main spring.

[0055] Alternatively, the main springs can be either left-handed or right-handed.

[0056] Furthermore, when the chassis is mounted on the door, it essentially houses all the operating elements of a foot-operated door opener.

[0057] In the second embodiment, the foot-operated door opener is operated by the user applying force to a pedal attached to a crank arm and shaft. A transmission shaft operates in conjunction with the transmission arm and drive pawl, and the transmission shaft operates in conjunction with a right-hand main spring as a drive assembly, which is mounted on a main chassis with accessories such as chassis mounting holes and screws or clamping plates. The gear train of this second embodiment includes a main gear having a clutch bearing, an idler gear speed-increasing gear and an idler gear shaft, as well as a secondary speed-increasing gear, a shaft, and a drive gear that drives a drive shaft with associated transmission gears and communicates with a drive wheel. A traction / tension bracket assembly adjusts the viscous or slippage and coefficient of friction of the components on the surfaces in which they move, including a support arm, an actuating arm, a connecting arm, a bracket pressing arm, a hinge pin, and a tension arm with a tension arm roller. A traction spring, together with a trigger actuating pin, is provided to ensure smooth opening and closing of the door, with a delay achieved through a frictional slip clutch between the drive wheel and the drive shaft.

[0058] In the third embodiment, during the entry cycle, the user activates a non-motorized, foot-operated door opener with a drivetrain (preferably a planetary gear assembly) by pressing a pedal. The force applied to the pedal drives a crank arm to rotate 60 to 90 degrees, engaging a soft wheel to open door D. The speed-increasing planetary gearbox winds one or more springs (left-hand and right-hand) to open the door sufficiently to allow the entrant to pass through until the entrant releases the pedal. With the aid of a return armspring, the crank arm returns to its original position. This action causes the crank arm to strike a trigger lever release mechanism, which in turn releases the ratchet hinge mechanism and springs, allowing the wheel return lifting springs to lift and rotate the wheel assembly upwards, returning it to its original upward position, guided and terminated by a guide pin. This disengages the wheel from the ground, allowing the door to close with a standard top-mounted closer or spring-loaded hinges, which is standard hardware for most doors. At that point after the door has opened and closed, it is already ready for the next entrant. Attached Figure Description

[0059] The invention can be best understood in conjunction with the accompanying drawings. It is worth noting that the invention is not limited to the specific embodiments shown in the following drawings, wherein:

[0060] Figure 1 This is an isometric view showing the pedal pointing downwards from the upper left.

[0061] Figure 2 It is a bottom right rear isometric view showing the door and floor removed, with the pedal in the upward position.

[0062] Figure 3 This is an isometric view showing the pedals pointing upwards and downwards from the upper right front.

[0063] Figure 4 It is a lower left rear isometric view showing the door and floor removed, with the foot pedal in the upward position.

[0064] Figure 4A This is a detailed cross-sectional view of the delay system of the main drive wheel 5.1.

[0065] Figure 4B This is a detailed cross-sectional view of the traction bracket assembly.

[0066] Figure 4C This is a schematic block diagram of an aerodynamic delay system.

[0067] Figure 4D This is a schematic block diagram of a damper delay system.

[0068] Figure 4E This is a schematic block diagram of a slipper clutch delay system.

[0069] Figure 5A , 5B Figures 6 and 7 show environmental details of using a foot-operated door opener, in which:

[0070] Figure 5A The image shows a pedestrian approaching a door with a foot-operated door opener, which includes a foot pedal attached to a crank arm, thereby enclosing the internal components of the foot-operated door opener within a housing.

[0071] Figure 5B It is a close-up detailed view of a pedestrian's foot approaching the pedal 1.1 mounted on the crank arm and the housing mounted on the ground "G" near the door "D"; and

[0072] Figure 6 It is a close-up, detailed view without any text labels.

[0073] Figure 7 This is an isometric view of the upper right front of the second embodiment of the door opener, showing the foot pedal in the downward position.

[0074] Figure 8 This is an isometric view of the upper right front of the second embodiment, with the pedal in the upward position.

[0075] Figure 9 yes Figure 7 The second embodiment is a left-top front isometric view showing the pedal down, but with a delayed slip clutch assembly to allow the user time to exit the open door.

[0076] Figure 10 This is a left-side isometric view of a third embodiment of a foot-operated door opener, showing the pedal in the upward position.

[0077] Figure 11 This is a right-side isometric view of a third embodiment of a foot-operated door opener, showing the pedal in the upward position.

[0078] Figure 12 This is an exploded view of the planetary gears related to the third embodiment.

[0079] List of reference numerals

[0080]

[0081]

[0082]

[0083]

[0084]

[0085] Detailed Implementation

[0086] This invention has wide applications in many technical fields involving various items. For illustrative purposes only, this document describes a preferred embodiment for carrying out the invention, in which a foot-operated door opener without electrical assistance is provided.

[0087] exist Figure 1-6 In the first embodiment shown, the foot-operated door opener of the present invention has a foot pedal for user convenience. It minimizes hand contact with unsanitary, hand-operated door handles, allowing for handless door opening when hands are occupied.

[0088] The current configuration of the first embodiment of the door opener is divided into seven different operating segments. The first segment is the crank assembly 1.0. When the pedal 1.1 is pressed down, the cycle begins, and the pedal 1.1 moves the crank arm 1.2 downward, transmitting torque to the crankshaft 1.3. The crank arm returns to its original position with the help of the return spring 1.33.

[0089] The next section is the drive assembly 2.0. The drive assembly is connected to the crank arm via a set of wire ropes 2.2. These wire ropes are wound on a drum 2.3, which rotates when the pedals and crank arm are pressed down, thereby winding around the main springs 2.6 and 2.7. In the current configuration, the springs, which can rotate both left and right, converge on the main shaft 2.5, generating the torque required to rotate wheel 5.1 via the gear train 4.0.

[0090] The chassis 3.1 houses all the different mechanisms and bushings within the chassis. It also houses the means by which the chassis is secured to the door using fasteners such as screws or clips.

[0091] The gear train 4.0 has a speed-increasing ratio of 1 to 10. A 60-degree rotation of the crank arm 1.2 translates to 4.5 revolutions of the 4-inch wheel 5.1. This is sufficient to open a door 635-762 mm (25 to 30 inches) wide. The main springs 2.6 and 2.7 drive the main gear 4.1, which has a one-way clutch bearing 4.11 centered on shaft 2.5. This allows the gear to travel in one direction without backlash or backward movement. The large main gear meshes with the small idler gear 4.2, which is connected to gear 4.3 via shaft 4.31. Gear 4.3 meshes with the drive gear 4.4. Drive gear 4.4 is mounted on the same shaft 4.5 as drive wheel 5.1. The transmission system transmits rotation of drive shaft 2.5 to drive shaft 4.5 in the same direction of rotation at a ratio of 1:10.

[0092] The drive wheel assembly 5.0 consists of a drive wheel, such as a soft durometer wheel or a pneumatic main drive wheel, which is connected to the main drive shaft 4.5 via a hub 5.2. Energy stored in the wound torsion springs 2.6 and 2.7 is transferred to the drive wheel 5.1 via a gear train. The drive wheel 5.1 is temporarily locked by a delay system to allow a safe time delay, for example, about 3 to 5 seconds, for the wheel 5.1 to begin rotating.

[0093] The delay system 6.0 retains and delays the energy release of the wound torsion springs 2.6 and 2.7. This allows a person's weight to be safely and ergonomically transferred to their feet. This unique feature enables a person's weight to return to the ground. This allows entrants to comfortably step aside to avoid the door swinging.

[0094] The delay assembly 6.0 consists of a double-acting cylinder 6.2 with a return spring. When the pedal 1.1 and crank arm 1.2 are pressed down, cylinder 6.2 is compressed by the main crankshaft 1.3. Cylinder 6.2 pressurizes the system to a single-acting pin cylinder 6.3 via a plastic tube 6.24 and a check valve 6.251, causing the plunger 6.32 to extend. This plunger presses down a pawl 6.4, which engages and locks a ratchet 6.5, which is directly connected to the main drive wheel 5.1. Air escapes from the compression chamber of the single-acting pin cylinder 6.2 through a fixed orifice limiter 6.252 or a needle valve, thereby regulating the delay. When pressure is released through the orifice limiter, the spring-loaded plunger 6.32 retracts with the aid of a tension spring 6.6 to release the pawl 6.4, allowing it to release the ratchet 6.5 on the main wheel 5.1. This delay releases the energy stored in the wound torsion spring without losing any energy and releases the rotation of drive wheel 5.1.

[0095] When the master pedal crank arm 1.2 is pressed down, the traction tension assembly 7.0 is actuated. This causes the crankshaft 1.3, which is connected to the actuating arm 7.2, to pull down the bracket pressing arm 7.3 via the connecting rod 7.21. The pressing arm 7.3 pulls down the tension arm 7.4 via the tension arm roller 7.41, which falls into a notch and is locked in place by the traction locking pawl 7.5 with the aid of the traction pawl spring 7.51, which maintains a constant slight torque, causing the traction locking pawl to contact the circular portion of the tension arm 7.4. The pressing arm 7.3 is pulled down via the guide pin and stop block 7.12 and engages the preloaded fork assembly 7.1, moving the drive wheel 5.1 toward the ground. The traction spring 7.6 maintains a constant downward pressure and applies a positive force to the ground to maintain traction throughout the entire 38.1 mm (1.5 inch) stroke 7.11. This is to accommodate: undercuts under any ramps in the path of the door, threshold, and opening the door.

[0096] When the main springs 2.6 and 2.7 release at the end of the cycle, the actuator pin 7.8 strikes the trigger rod 7.7, and the locking pawl 7.5 is lifted via the pawl actuator shaft 7.52, thereby releasing the fork assembly with the aid of the fork assembly lift spring 7.13. This lifts the main drive wheel 5.1 back to its rest position, ready for the next cycle.

[0097] Figure 4A , 4B It displays cross-sectional details of the mechanism that are difficult to see in an isometric view. Figure 4C , 4D 4E shows an optional system with a schematic diagram.

[0098] Figure 4A This is a close-up detail of a portion of the wheel retardation assembly. For example, as described above, the retardation assembly 6.0 consists of a double-acting cylinder 6.2 with a return spring. When the pedal 1.1 and crank arm 1.2 are pressed down, cylinder 6.2 is compressed via the main crankshaft 1.3. Cylinder 6.2 pressurizes the system to a single-acting pin cylinder 6.3 via a plastic tube 6.24 and a check valve 6.251, causing the plunger 6.32 to extend. This plunger presses down a pawl 6.4, which engages and locks a ratchet 6.5, which is directly connected to the main drive wheel 5.1. Air escapes from the compression chamber of the single-acting pin cylinder 6.2 through a fixed orifice limiter 6.252 or a needle valve to adjust the retardation. When the pressure is released through the orifice limiter, the spring-loaded plunger 6.32 retracts with the aid of the tension spring 6.6 to release the pawl 6.4, thereby allowing the pawl 6.4 to release the ratchet 6.5 on the main wheel 5.1. This delay releases the energy stored in the wound torsion spring without any energy loss and releases the rotation of the drive wheel 5.1.

[0099] Figure 4B This is a close-up detail of the traction / tension bracket assembly. For example, as described above, when the master pedal crank arm 1.2 is pressed down, the traction / tension assembly 7.0 is actuated. This causes the crankshaft 1.3, which is connected to the actuating arm 7.2, to pull down the bracket pressing arm 7.3 via the connecting rod 7.21. The pressing arm 7.3 pulls down the tension arm 7.4 via the tension arm roller 7.41, which falls into a notch and is locked in place by the traction locking pawl 7.5 with the assistance of the traction pawl spring 7.51. The traction pawl spring maintains a continuous slight torque, causing the traction locking pawl to contact the circular portion of the tension arm 7.4. The pressing arm 7.3 is pulled down via the guide pin and stop block 7.12 and engages the preloaded fork assembly 7.1, moving the drive wheel 5.1 toward the ground. The traction spring 7.6 maintains a constant downward pressure and applies a positive force to the ground to maintain traction throughout the entire 38.1 mm (1.5 inch) travel 7.11. This is to accommodate undercuts under any ramps in the travel path of the door, threshold, and opening door.

[0100] When the main springs 2.6 and 2.7 release at the end of the cycle, the actuator pin 7.8 strikes the trigger rod 7.7, and the locking pawl 7.5 is lifted via the pawl actuator shaft 7.52, thereby releasing the fork assembly with the aid of the fork assembly lift spring 7.13. This lifts the main drive wheel 5.1 back to its rest position, ready for the next cycle.

[0101] Figure 4C This is a schematic diagram of an optional pneumatic delay system. When the double-acting cylinder is actuated by crankshaft 1.3, the system is pressurized with the assistance of check valves. These valves allow pressure to build up in the single-acting pin cylinder, thereby engaging the plunger. A second check valve from the master cylinder line maintains the seal and pressure of the pin cylinder. An orifice limiter or needle valve releases pressure at a controlled rate, thus delaying the release of the drive wheel. The first check valve in the line releases pressure in the master cylinder, so it has an unimpeded backflow, allowing it to inflate the system on the next pedal press.

[0102] This can also serve as a delay for engaging the traction release mechanism 7.0, providing another delay option for keeping the door open by delaying the closing cycle at a fixed or variable time interval.

[0103] Figure 4D This is a schematic diagram of a selectable damper delay system. This mechanism can be used with... Figure 4C It can be used in conjunction with a pneumatic system or as a standalone system physically activated by a mechanical device. The use of a spring-loaded damping cylinder in conjunction with a restrictor or needle valve enables controlled release of the plunger, equivalent to a delay in the start of drive wheel engagement.

[0104] This can also serve as a delay for the engagement of the traction release mechanism 7.0, providing another delay option for keeping the door open, delaying the closing cycle at a fixed or variable time interval.

[0105] Figure 4E This is a schematic diagram of an optional friction slip clutch delay system. A stationary device fixed to the shaft disc engages with a rotating disc attached to the drive wheel. The two brake discs are allowed to slip a predetermined degree until they mechanically engage and lock together. The time delay is adjusted by changing the tension applied to the loading spring using a tension nut. This changes the duration of the slip until the two surfaces mechanically engage.

[0106] This can also serve as a delay for the engagement of the traction release mechanism, providing another option for when the closing cycle begins.

[0107] Figure 5A , Figure 5B and Figure 6The environment details show the use of a foot-operated door opener.

[0108] For example, Figure 5A The image shows a pedestrian approaching a door “D” with a foot-operated door opener 10, which includes a foot pedal 1.1 connected to a crank arm 1.2, thereby enclosing the internal components of the foot-operated door opener 10 in a housing 12. Figure 5A Also shown is a wordless directional sign 13 displayed on or near the door surface. The sign preferably has a triptych of three images, including a diagonal “NO” sign with an image of a user’s hand gripping the door handle, a close-up detail view of a pedestrian’s foot touching the pedal 1.1, and an image showing the door open in the direction of the curved arrow shown, with caution advised in the path of the door swinging.

[0109] Figure 5B It is a close-up detailed view of a pedestrian's foot near the pedal 1.1 mounted on the crank arm 1.2 and the housing 12 mounted on the ground "G" near the door "D".

[0110] Figure 6 This is a close-up detailed view of the unmarked indicator 13.

[0111] In the foregoing description, certain terms and visual descriptions are used to illustrate preferred embodiments. However, the terms used or the illustrations depicted, other than those shown in the prior art, should not be construed as unnecessarily limiting, as the terms and illustrations are merely exemplary and do not imply limitation of the scope of the invention.

[0112] In the second embodiment, as Figure 7-9 As shown, the current configuration of the door opener consists of seven different operations. The first operation is the crank assembly 31.0. This cycle begins when the pedal 31.1 is pressed down, causing the crank arm 31.2 to move downwards, transmitting force to the crankshaft 31.3. During the opening cycle, the crank arm returns to its original position via the trigger actuation pin 37.8 with the aid of the main spring 32.6. The crank arm 31.2 is connected to the drive arm 32.7 via the connecting rod 32.2.

[0113] The next operation is the drive assembly 32.0. When the pedals and crank arms are pressed down, the drive assembly connects to the master spring 32.6, which coils up and rotates the master gear 34.1 via the transmission shaft 32.5, which has a clutch bearing 34.11 centered on the shaft 32.5. This allows the gear to travel in one direction without backlash or backward movement. The master gear remains in place, preventing the master spring from being released via the drive pawl 32.3, which is pressed down and set by the connecting rod 32.2, winding around the master spring 32.6.

[0114] The chassis 33.1 houses all the different mechanisms and bushings within the chassis. It also provides means for securing the mechanisms to the door with screws or clips.

[0115] Gear train 34.0 has a speed-increasing ratio of 1 to 10. Therefore, when crank arm 31.2 rotates 60-90 degrees, wheel 35.1 (0.4 inch) will make a net 2 1 / 2 to 3 revolutions. This is sufficient to open a door 635-762 mm (25 to 30 inches) in diameter. The main spring 32.6 drives the main gear 34.1, which meshes with the drive gear 34.6. The large drive gear moves down to the small idler gear 34.2, which then moves up again to the auxiliary speed-increasing gear 34.3, and finally reaches the drive gear 34.4. The drive gear is mounted on the same shaft 34.5 as the drive wheel 35.1.

[0116] The drive wheel assembly 35.0 consists of a hardness gauge wheel connected to the main drive shaft 34.5, which is connected to the drive shaft. The potential energy of the spring 32.6 is coiled by the downward pressure of the pedal 31.1 and crank arm 31.2, which are connected to the drive arm 32.7 via a connecting rod 32.2. The connecting rod 32.2 is wound around the spring 32.6. The potential energy is temporarily suppressed and not released.

[0117] The delay component 36.0 retains and delays the release of the potential energy of the coiled spring. This allows a person's weight to be safely and ergonomically transferred to their feet. This unique feature enables a person's weight to return to the ground. This allows entrants to comfortably step aside from the swinging of the door.

[0118] The delay assembly consists of a spring-loaded cylinder (not shown). When the pedals and crank arms are pressed down, the cylinder is compressed via the main crankshaft. With the aid of a hose and a check valve, the cylinder moves air to the piston and plunger of a single-pin cylinder. This plunger presses down a pawl, which engages a ratchet, directly connected to the main drive wheel. Air escapes from the compression chamber, which is regulated by a needle valve to adjust the delay. When the pressure is released, the plunger disengages with the aid of a tension spring, causing the pawl to release from the ratchet on the main drive wheel.

[0119] Alternatively, the method involves using a spring-loaded damper with a plunger instead of a single-acting pin cylinder. This will be mechanically activated. This eliminates the need for a cylinder, hose, and check valve. The delay releases the potential energy stored in the main spring and initiates the rotational cycle of the wheel without losing any potential energy.

[0120] Alternatively, the method includes a friction clutch 36.1 to constrain the drive wheel 35.1 or the main gear 34.1 for a fixed or variable duration, such as... Figure 4E As shown.

[0121] The traction tension assembly 37.0 adjusts the viscosity, slip, or coefficient of friction of each component on its moving surface. It is activated when the master pedal crank arm 31.2 is pressed down. This causes the connecting arm 37.21 to rotate and descend, which in turn lowers the bracket pressing arm 37.3. The pressing arm actuates the support arm 37.1 via the engaging actuator arm 37.2, which engages the traction spring 37.6. This maintains a constant variable pressure on the support arm 37.1, thus providing constant pressure on an inclined floor.

[0122] When the drive pawl 32.3 rotates together with the main gear 34.1, the pedal 31.1, the transmission arm 32.2, and the connecting arm 37.21 all raise the bracket lower arm 37.3. This, in turn, causes the lower arm to engage the actuating arm 37.2 to raise the support arm 37.1, which in turn engages the traction spring 37.6 to raise the support arm 37.1 and retract the wheel 35.1. Therefore, the door D can now swing freely and return to the closed position by means of a hinge mounted on the top of the floor or a spring-loaded hinge. This allows the door to close without assistance.

[0123] exist Figure 10-12 In the third embodiment shown, a non-motorized, foot-operated door opener is activated by the user pressing pedal 51.1 to enter a cycle. The force applied to pedal 51.1 drives crank arm 51.2 to rotate 60 to 90 degrees, engaging soft wheel 55.1 to open door D. Pedal 51.1 is rigidly connected to crank arm 51.2, which engages a one-way clutch bearing 54.11, which is connected to planetary gearbox 54.1, which in turn is connected to drive shaft hub 54.5 to rotate soft wheel 55.1. Downward pressure from pedal 51.1 causes support arm 57.1 to pivot about traction locking ratchet 57.5, connected to hinge 57.31 of main chassis 53.1, which is a spring-loaded wheel assembly 57.6 to maintain constant pressure on ground G.

[0124] The speed-increasing planetary gearbox 54.1 winds one or more springs 52.27 and 52.26 (right-hand and left-hand), optionally, if the order is reversed, from the crank arm to the gears, or alternatively, multiple pumps of the pedal, which is also possible, then rotates the wheel system (each wheel system connected to the drive shaft 54.5), which in turn rotates the wheel 51.1, opening the door D through multiple 360-degree rotations, fully allowing the entrant to pass through until the foot pedal 51.1 disengages from the entrant. With the aid of the arm return spring 51.33, the crank arm 51.2 returns to its original position. This action causes crank arm 51.1 to strike trigger lever release device 57.7, thereby releasing ratchet hinge mechanism 57.5 and spring 57.6. This allows the wheel position lift spring 57.8 to rotate the wheel assembly upwards, guided by guide pin 57.11 and stop block 57.12 back to its upward original position. Then wheel 55.1 is released from the ground, allowing the door to close with a standard top-mounted closer or spring-loaded hinges, which is standard hardware on most doors. At that point after the door has opened and closed, it is ready for the next entrant.

[0125] Figure 10-12 Embodiments may include optional main springs or springs 52.27 and 52.26 (capable of both right-hand and left-hand rotation), which may be wound to further assist in accommodating the delayed action 56.0, wherein, at this time, the spring-loaded wheel actuated by the foot switch descends and participates in the opening cycle as described above. After actuation, also as described above, the door will close after a delay of 56.0 as the spring mechanism retracts. Both opening and closing rely on mechanical advantages, eliminating the need for electricity or motors.

[0126] In general, Figure 1-6 In all three embodiments 7-9 and 10-12, the present invention differs from any prior art motorized door opener in that it is unique, novel, and distinguishable because it is a simple machine without any type of electricity, motor, scanner, or flow reader, and maintains constant pressure on the floor plane through mechanical advantages and a ratchet, spring-loaded hinge assembly. It hygienically opens doors when one wishes to avoid disease, virus, bacteria, or other hazards, or when hands are occupied (e.g., food service and warehouse personnel) and cannot operate by hand. It facilitates access to all types, locations, and environments by fixing an economical device that can be added to or modified to any type of door through mounting holes or clamps in a bracket or chassis to doors made of wood, hollow metal, metal-framed glass, all-glass, etc.

[0127] In general, Figure 1-6In all three embodiments 7-9 and 10-12, the present invention is different from any non-motorized door opener in the prior art and is unique, novel and distinguishable because it is a simple machine that can develop the mechanical advantages required to safely open exterior doors and other doors without manual operation, and provides an ergonomic, user-friendly, and safe interface with integrated delay when paired with doors that have standard resistance due to the presence of top-mounted closers, floor closers and spring hinges.

[0128] It should also be noted that, although Figure 4A , 4B Combining 4C, 5A, and 5B Figure 6 and Figure 1-4 Preferred embodiments have been shown, but it should be understood that, Figure 4A , 4B 4C, 5A, 5B and Figure 6 Can also be used with Figure 7-9 Used in conjunction with alternative embodiments 10-12.

[0129] Figure 7 , 8 The second embodiment shown in Figure 9 describes a non-preferred embodiment with a friction slip clutch delay assembly, wherein the gear train includes a main gear, an idler gear, a speed-increasing gear, and a secondary gear.

[0130] Figure 10 , 11 The third embodiment shown in Figure 12 describes another non-preferred embodiment, which optionally lacks a delay component, and wherein the gear train is a planetary gear assembly.

[0131] It is also known that, as described in the appended claims, other modifications may be made to the invention without departing from the scope of the invention.

Claims

1. A foot-operated door opener (10), characterized in that: A chassis (3.1) comprising: one or more mounting holes (3.2) configured to mount the chassis (3.1) to a door (D); Crank assembly (1.0), comprising: A crankshaft (1.3) is rotatably mounted on the chassis (3.1); A crank arm (1.2) having a first end fixedly fastened to the crankshaft (1.3); Foot pedal (1.1), which is positioned at the second end of the crank arm (1.2); The crank arm (1.2) is configured to rotate by a force applied to the foot pedal (1.1) to cause the crank shaft (1.3) to rotate from its original position to at least a second position in a first rotational direction; A return spring (1.33) is configured to bias the crank arm (1.2) toward its original position; The driver component (2.0) includes: A main shaft (2.5) rotatably mounted on the chassis (3.1), the main shaft (2.5) comprising: a cylindrical portion (2.3); One or more main springs (2.6, 2.7) are mounted on the main shaft (2.5), each having a first end fastened to the chassis and a second end fastened to the main shaft; and One or more cables (2.2) having a first portion configured to be attached to and wound around the cylindrical portion (2.3) and a second portion connected to the crank arm (1.2); Drive wheel assembly (5.0), comprising: A drive shaft (4.5) rotatable relative to the chassis (3.1); and A drive wheel (5.1) is mounted on the drive shaft (4.5); Gear train (4.0), which includes: A main gear (4.1) and a clutch bearing (4.11) are mounted on the main shaft (2.5), the clutch bearing (4.11) being configured to provide unidirectional rotation of the main gear; A drive gear (4.4) is mounted on the drive shaft (4.5); A gear train shaft (4.31) is rotatably mounted on the chassis (3.1); An idler gear (4.2) is mounted on the gear train shaft (4.31); A secondary speed-increasing gear (4.3) is mounted on the gear train shaft (4.31); The primary gear (4.1) meshes with the idler gear (4.2), and the secondary gear (4.3) meshes with the drive gear (4.4); and The gear train (4.0) is configured to transmit power from the main shaft (2.5) to the drive wheel (5.1) at a preselected ratio via the main gear (4.1), the idler speed-increasing gear (4.2), the secondary speed-increasing gear (4.3), and the drive gear (4.4); When force is applied to the foot pedal (1.1) to cause the crank arm (1.2) and the crankshaft (1.3) to rotate away from their original positions in a first rotational direction, one or more cables (2.2) cause the main shaft (2.5) to rotate together in the corresponding first rotational direction, thereby causing one or more main springs (2.6, 2.7) to wind around, while the rotation of the main gear (4.1) is controlled by the clutch bearing (4.11), which prevents the main gear (4.1) from rotating together in the corresponding first rotational direction; and When force is removed from the foot pedal (1.1), the bias provided by the return spring (1.33) causes the crank arm (1.2) to return to its original position, and the wound main springs (2.6, 2.7) unwind, causing the main gear (4.1) to rotate in the opposite direction in the second rotational direction. This causes the idler gear (4.2), the secondary gear (4.3), and the drive gear (4.4) to rotate in the opposite direction. The corresponding reverse rotation of the drive gear (4.4) causes the drive shaft (4.5) to rotate in the opposite direction, and the drive wheel (5.1) to rotate in the opposite direction as well. The contact between the drive wheel (5.1) and the ground (G) causes the door (D) to open.

2. The foot-operable door opener (10) as described in claim 1, further comprising: The traction tension bracket assembly (7.0) is characterized by: A fork member (7.1) is pivotally mounted to the gear train shaft (4.31) for pivoting between a rest position and a lowered position, in which the drive wheel (5.1) contacts the ground (D), the fork member including: a guide opening (7.11); The drive shaft (4.5) is rotatably mounted on the fork member (7.1); A fork member lifting spring (7.13) is configured to bias the fork member (7.1) toward a rest position; A tension arm (7.4) is rotatably mounted on the gear train shaft (4.31), the tension arm (7.4) being characterized by having a notch; A guide pin (7.12) is configured to protrude from the tension arm (7.4), a portion of which is received within the guide opening of the fork member (7.1); The roller (7.41) is configured to protrude from the tension arm (7.4); The actuator arm (7.2) is fixedly mounted on the crankshaft (1.3); The bracket lower pressure arm (7.3) is pivotally mounted to the chassis (3.1); The connecting rod (7.21) has a first portion rotatably connected to the actuating arm (7.2) and a second portion rotatably connected to the bracket lower pressure arm (7.3); A traction spring (7.6) is configured to bias the fork member (7.1) relative to the tension arm (7.4) to maintain downward pressure between the drive wheel (5.1) and the ground (G) to maintain traction, thereby adapting to any slope in the travel path of the drive wheel (5.1) during door opening (D) when the fork member (7.1) is in the lowered position; Pawl actuator shaft (7.52); The locking pawl (7.5) is securely fastened to the pawl actuator shaft (7.52); A traction pawl spring (7.51) is configured to maintain the locking pawl (7.5) in contact with the tension arm (7.4); and When a force is applied to the foot pedal (1.1) to cause the crank arm (1.2) and the crank shaft (1.3) to rotate in a first rotational direction, the actuator arm (7.2) rotates in the first rotational direction and causes the connecting rod (7.21) to drive the bracket lowering arm (7.3). A portion of the driven bracket lowering arm (7.3) contacts the roller (7.41) to drive the tension arm (7.4) to rotate, causing the guide pin to drive the fork member (7.1) to pivot to a lowered position. In the lowered position, a portion of the locking pawl (7.5) engages the notch of the tension arm (7.4) to lock the tension arm (7.4) and hold the fork member (7.1) in the lowered position.

3. The foot-operable door opener (10) as described in claim 2, further comprising: Delay component (6.0), characterized in that: A pawl (6.4) is pivotally mounted to the fork member (7.1); A spring (6.6) is configured to bias the pawl (6.4) to rotate it from a first pivot position to a second pivot position; A ratchet (6.5) is directly connected to the drive wheel (5.1); When the pawl is in the first pivot position, a portion of the pawl (6.4) is configured to engage a portion of the ratchet (6.5), thereby blocking the rotational movement of the drive wheel (5.1); When the pawl is in the second pivot position, the portion of the pawl disengages from the portion of the ratchet to allow rotational movement of the drive wheel (5.1); Arm (6.1) is fixedly fastened to the crankshaft (1.3); A cylinder (6.2), the first end of which is pivotally mounted to the chassis (3.1); A shaft and a U-shaped clamp (6.21), the shaft being configured to slide within the cylinder (6.2), the U-shaped clamp at the distal end of the shaft being pivotally mounted to the arm (6.1) by a U-shaped clamping pin (6.22); Valve assembly (6.25), the valve assembly (6.25) comprising: First air tube (6.24) and second air tube (6.24); T-fittings for pipelines; First check valve (6.251) and second check valve (6.251); Limiter or needle valve (6.252); Pin cylinder (6.3); A plunger (6.32) is configured to slide within the cylinder (6.3); The first end of the first air pipe (6.24) is in fluid communication with the cylinder (6.2) of the pneumatic actuator, and the second end of the first air pipe (6.24) is in fluid communication with the first opening of the T-joint; The air outlet of the first check valve (6.251) is in fluid communication with the second opening of the T-connector; The air inlet of the second check valve (6.251) is in fluid communication with the third opening of the T-joint; The first end of the second air pipe (6.24) is in fluid communication with the air outlet of the second check valve (6.251), and the second end of the first air pipe (6.24) is in fluid communication with the pin cylinder (6.3); When force is applied to the foot pedal (1.1) to cause the crank arm (1.2) and the crank shaft (1.3) to rotate in the first rotational direction, the arm (6.1) rotates together in the first rotational direction and causes the shaft (6.21) to extend, thereby pressurizing the air in the cylinder (6.3), forcing the air through each of the first air pipe (6.24), the second check valve (6.251), and the second air pipe (6.24), generating air pressure in the second air pipe (6.24), and causing the plunger (6.32) to extend from the cylinder (6.3) to drive the pawl (6.4) from the second rotational position to the first rotational position, thereby engaging the portion of the ratchet (6.5) and blocking the rotational movement of the drive wheel (5.1); The air pressure in the second air tube (6.24) also causes air to flow out from the limiter or needle valve (6.252); The air flowing from the limiter or needle valve (6.252) is time-delayed to prevent the reverse rotation of the drive wheel (5.1) and thereby prevents the energy release of the wound main springs (2.6, 2.7) to allow the entrant to move away from the door (D) until the remaining air pressure in the second air pipe (6.24) is overcome by the biasing force of the spring (6.6), after which the spring (6.6) biases the pawl from the first rotational position to the second rotational position, thereby allowing the drive wheel (5.1) to rotate by the release of the one or more main springs (2.6, 2.7) and open the door (D).

4. The foot-operable door opener (10) as described in claim 3, further comprising: The actuating pin (7.8) is configured to protrude from a portion of the main shaft (2.5); The trigger lever (7.7) is fixed relative to the pawl actuator shaft (7.52); When the wound one or more main springs (2.6, 2.7) approach the end of the release cycle, the actuating pin (7.8) strikes the trigger rod (7.7) to pivot the pawl actuator shaft (7.52), thereby releasing the tension arm (7.4) to lift the fork member (7.1) and the drive wheel (5.1) from the lowered position back to the stationary position.

5. The foot-operable door opener (10) as described in claim 4, characterized in that, The drive wheel (5.1) is formed of a soft hardness tester material.

6. The foot-operable door opener (10) as described in claim 5, characterized in that, The gear train (4.0) has a preselection ratio in the range of 1 to 10.

7. The foot-operable door opener (10) as described in claim 6, characterized in that, The one or more main springs (2.6, 2.7) are at least one left-handed spring and at least one right-handed spring.

Images