Adjustable door body, household protective door fence with adjustable door body and adjusting method of household protective door fence

Abstract

The invention discloses an adjustable door body, a household protective door fence with the adjustable door body and an adjusting method of the household protective door fence. The adjustable door body comprises a frame structure composed of frame components and a plurality of internal connecting components. According to the improvement, at least one pair of oppositely-arranged frame components is of a telescopic structure with the adjustable length, and at least one part of the multiple connecting components is detachably installed on the pair of frame components. The width of the door body is changed by adjusting the length of the telescopic structure, and the installation number of the detachable connecting components is correspondingly increased or decreased, so that the filling density in the door body can be matched with different widths in a self-adaptive mode, and therefore the reasonable protection gap and the overall structural strength are always guaranteed while large-width stepless adjustment is achieved. The household protective door fence based on the door body has the advantages of being wide in installation adaptation range, convenient to adjust, safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of household security door technology, and in particular to an adjustable door body, a household security door with the same, and a method for adjusting it. Background Technology

[0002] In the field of home security gates, common solutions to accommodate doorways or passageways of varying widths include offering a variety of fixed-size gates for users to choose from, or adding adjustable telescopic blocks at both ends of the gate. These solutions have significant limitations:

[0003] Offering multiple product specifications increases inventory and selection costs;

[0004] Simple end-effector adjustments are usually limited in range and may affect the stability and aesthetics of the overall structure.

[0005] More importantly, existing home security door frames have two inherent rigidity limitations in their structure:

[0006] Firstly, the frame that forms the outline of the door is usually a rod of fixed length, and its overall size cannot be substantially changed.

[0007] Secondly, the number and position of the protective grilles filling the inside of the frame are also fixed and cannot be increased, decreased or adjusted.

[0008] These two fixed characteristics together lead to the rigidity of the door's adaptability.

[0009] When the installation space does not match the standard dimensions of the door, users often face the safety hazard of being unable to install or having large gaps. Even if the total width of the door is widened by auxiliary means, the spacing of its internal grilles will be passively increased, which may lead to the failure of protection (excessive spacing), or make the structure redundant and wasteful of materials when shrinking.

[0010] Therefore, the industry urgently needs a door structure solution that can fundamentally overcome the above limitations.

[0011] The ideal solution should allow the door frame itself to reliably and with a wide range of extension and retraction adjustment, while its internal connecting support structure can also be flexibly and collaboratively changed, so as to maintain uniform and appropriate gaps and overall structural strength under any adjusted size, achieving true, high-performance adaptive width adjustment. Summary of the Invention

[0012] The main objective of this invention is to propose an adjustable door body, a household security door frame having the same, and an adjustment method thereof, aiming to fundamentally solve the problem of rigid adaptability caused by the fixed door frame and unchangeable internal grilles in the prior art.

[0013] To achieve the above objectives, the present invention proposes an adjustable door, comprising:

[0014] A frame structure, wherein the frame structure is composed of multiple circumferentially arranged border members connected together, wherein at least one pair of oppositely arranged border members is a telescopic structure with adjustable length.

[0015] Multiple connecting members are disposed within the area enclosed by the frame structure, and the two ends of each connecting member are used to connect with the pair of oppositely arranged frame members;

[0016] At least a portion of the plurality of connecting members are detachably connected to the frame members, and the number of detachable connecting members installed on the pair of frame members is varied to match different length states of the telescopic structure.

[0017] Preferably, the frame structure is a quadrilateral frame;

[0018] The pair of telescopic frame components are the upper frame component and the lower frame component.

[0019] Preferably, the telescopic structure is a telescopic tube structure.

[0020] Preferably, the telescopic tube structure includes a first tube segment and a second tube segment that are nested together, and a locking device for locking the relative positions of the first tube segment and the second tube segment.

[0021] Preferably, the first pipe segment is an inner pipe, the second pipe segment is an outer pipe, and the outer pipe is slidably sleeved on the outside of the inner pipe;

[0022] The telescopic tube structure also includes a limiting structure to prevent the inner tube from completely separating from the outer tube.

[0023] Preferably, the limiting structure includes a first limiting part disposed at the end of the inner tube insertion end, and a second limiting part disposed inside the outer tube;

[0024] When the inner tube extends to its limit position relative to the outer tube, the first limiting part engages or interferes with the second limiting part to prevent the inner tube from detaching from the outer tube.

[0025] Preferably, the locking device includes a housing sleeved outside the outer tube, an operating member movably disposed in the housing, and a pressing member capable of passing through the outer tube and abutting against the outer wall of the inner tube;

[0026] When the operating element is operated, it can move between a first position and a second position.

[0027] When in the first position, the clamping member presses against the outer wall of the inner tube under the drive of the operating member to lock the extension and retraction;

[0028] When in the second position, the clamping member releases its pressure on the outer wall of the inner tube to allow for expansion and contraction.

[0029] Preferably, both ends of one of the connecting members are connected to the housings of the locking devices on the upper frame member and the lower frame member, respectively.

[0030] Preferably, the upper frame component and the lower frame component are each provided with a plurality of insertion positions;

[0031] Both ends of the connecting member are detachably connected to the corresponding insertion positions, and at least one end of the connecting member is provided with a movable plug-in.

[0032] The plug-in is movable relative to the body of the connecting member between an inserted position and a disengaged position;

[0033] When the plug is in the plug position, the plug part of the plug is in a state that can be inserted or held in the corresponding plug position;

[0034] When the plug is moved to the disengaged position, the plug part of the plug exits the corresponding plug position, thereby realizing the disassembly of the corresponding end of the connecting component.

[0035] Preferably, the movable plug is provided at both ends of the connecting member.

[0036] Preferably, the connecting member further includes an elastic element that applies an elastic force to the plug-in to tend to move the plug-in toward or remain in the plug-in position.

[0037] Preferably, the plug-in has a portion exposed outside the connecting member for operation;

[0038] During operation, the insert is moved to the disengaged position by overcoming the elastic force of the elastic element;

[0039] After the operation is removed, the plug-in automatically resets to the insertion position under the action of the elastic element.

[0040] Preferably, all of the plurality of connecting members are detachably connected to the upper frame member and the lower frame member.

[0041] Preferably, the frame member and / or the connecting member are round or square tubes.

[0042] Preferably, the frame structure further includes a left frame member and a right frame member connected to the upper frame member and the lower frame member;

[0043] The left and right frame components have fixed lengths and together with the top and bottom frame components, they form a stable quadrilateral frame.

[0044] The present invention also proposes a household security door railing, including the aforementioned adjustable door body;

[0045] An assembly structure is provided on one side of the door body for rotatably assembling the door body into a preset position;

[0046] A door lock is used to lock the door when it is in the closed position.

[0047] The present invention also proposes a method for adjusting the width of the aforementioned adjustable door, comprising the following steps:

[0048] Adjustment steps: Operate the telescopic structure of the at least one pair of frame members to adjust the frame structure to the target width;

[0049] Adaptation steps: Determine the number of detachable connecting components to be installed based on the adjusted length of the telescopic structure;

[0050] Installation steps: Install the appropriate number of detachable connecting components onto the pair of frame components.

[0051] The adjustable door and household security door frame provided by this invention overcomes the fundamental limitations of traditional security door frames, which have fixed sizes and poor adaptability, by designing the door frame as a telescopic structure and innovatively allowing the number of internal connecting components to be adjusted accordingly. This solution enables smooth and continuous adjustment of the door width over a wide range, allowing users to perfectly adapt to various widths of installation openings with just one product, completely eliminating the problems caused by measurement errors and the cost and storage hassles of purchasing multiple specifications. During adjustment, by increasing or decreasing the number of connecting components, the uniform and safe spacing of the internal grilles is always maintained, ensuring effective protection performance at any width while avoiding structural redundancy or material waste. Its quick-release connection structure design makes adjustment extremely simple and fast, requiring no tools and greatly improving the user experience. Furthermore, the overall structural design is scientifically sound, the telescopic mechanism locks reliably, and the fixed frame ensures overall stability, allowing the product to achieve convenience and save packaging volume without sacrificing the robustness and durability necessary for a security product. In summary, this invention successfully provides an innovative home protection solution that truly achieves "multi-functionality, flexibility, and security," possessing outstanding practical value and significant market competitiveness. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the application after the door has been enlarged and adjusted;

[0053] Figure 2 This is a schematic diagram of the present application after the door body has been reduced in size and adjusted;

[0054] Figure 3 This is a schematic diagram showing the connecting components after they have been separated from the door body.

[0055] Figure 4 This is an exploded view of one end of the connecting component;

[0056] Figure 5 This is a sectional view of one end of the connecting component;

[0057] Figure 6 This is a schematic diagram of the first pipe section, the second pipe section, the first limiting part, the second limiting part, and the locking device;

[0058] Figure 7 This is a cross-sectional view of the locking device;

[0059] Figure 8 This application provides a schematic diagram of the locking device based on the threaded locking principle.

[0060] Figure 9 Schematic diagrams of the first pipe section, the second pipe section, and the locking device based on the threaded locking principle.

[0061] Figure 10 This is a cross-sectional view of a locking device based on the threaded locking principle. Detailed Implementation

[0062] The technical solutions in the embodiments of the present invention 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 the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0063] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the attached figure). If the specific posture changes, the directional indicators will also change accordingly.

[0064] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0065] This invention proposes an adjustable door frame. By designing at least one pair of frame edges as a telescopic structure and making the internal connecting members 2 partially or completely detachable and adjustable in number, the door frame can maintain a reasonable density and uniform gaps in the internal support structure by increasing or decreasing the number of connecting members 2 while adjusting the overall width. This allows for free and flexible adjustment of the door width over a wide range, ensuring stable structural strength and consistent protective performance at any size, achieving a multi-functional door design.

[0066] In embodiments of the present invention, such as Figures 1 to 10 As shown, the adjustable door has an integral frame structure and multiple connecting components 2 disposed within the frame structure.

[0067] Specifically, the frame structure is composed of multiple circumferentially arranged border members connected together to form a closed profile. At least one pair of border members arranged opposite each other is configured as a telescopic structure with adjustable length. This means that by manipulating this telescopic structure, the length of this pair of border members can be directly changed, thereby altering the overall size of the entire frame structure in that direction.

[0068] Within the area enclosed by the frame structure, multiple connecting members 2 are installed. The two ends of these connecting members 2 are respectively connected to the aforementioned pair of oppositely arranged, retractable frame members. Their main function is to fill the frame, form a protective fence, and enhance the overall structural stability.

[0069] Of the plurality of connecting members 2, at least a portion are detachably mounted on the pair of frame members. When we need to adjust the width of the door, we first operate the telescopic structure on the frame member to lengthen or shorten it to the required size. Then, based on the new length after the telescopic structure adjustment, which is the new width of the frame structure, we determine how many detachable connecting members 2 need to be installed. By increasing or decreasing the number of installed detachable connecting members 2, we can perfectly adapt to the requirements of internal filling density after the frame width changes. For example, when the frame structure is widened, more connecting rods are installed to maintain reasonable gaps and prevent children or pets from crawling through; when the frame is narrowed, the excess connecting rods can be removed to make the structure compact and avoid waste.

[0070] Specifically, in a preferred embodiment, the frame structure is a quadrilateral frame, such as a rectangle. The pair of retractable frame members are preferably an upper frame member 11 and a lower frame member 12, whose lengths are adjusted to achieve stepless changes in the door width. The left and right sides of the frame are typically composed of a left frame member 18 and a right frame member 19 of fixed length, which are firmly connected to the ends of the retractable upper and lower frame members 12 to form a stable and robust rectangular frame at any width.

[0071] To achieve reliable telescopic function, the telescopic structure can adopt a mature telescopic tube structure;

[0072] Specifically, taking the upper border component 11 as an example, such as Figure 3 and Figure 6 As shown, the telescopic pipe structure includes a first pipe section 13 and a second pipe section 14 that are nested together. In order to achieve fixation after telescoping, a locking device 3 must also be provided to lock the relative position between the first pipe section 13 and the second pipe section 14 to prevent them from sliding accidentally when subjected to force.

[0073] Furthermore, a more specific design for the telescopic tube structure is as follows:

[0074] The first pipe section 13 is designed as the inner pipe, and the second pipe section 14 is designed as the outer pipe, allowing the outer pipe to slidably fit over the inner pipe. To prevent the inner pipe from being completely pulled out and detaching from the outer pipe during adjustment, which could cause the structure to fall apart, a limiting structure is also provided on the telescopic pipe structure. This limiting structure can prevent the inner pipe from further detaching from the outer pipe when it extends to its limit position. For example, a first limiting part 15, such as a clamp, pin, or a cover, can be provided at the end where the inner pipe is inserted into the outer pipe, while a second limiting part 16, such as another clamp, another pin, or another cover, can be provided inside the outer pipe. When the inner pipe is pulled out to its limit, the first limiting part 15 will engage or interfere with the second limiting part 16, thereby providing a mechanical blocking effect.

[0075] Specifically, regarding the locking device 3 in the aforementioned telescopic tube structure, the present invention provides a preferred embodiment, such as... Figure 1 , 2 As shown in points 3, 6, and 7:

[0076] The locking device 3 includes a housing 31 that is sleeved and fixed to the outside of the outer tube. The housing 31 contains a user-operable movable part, namely an operating element 32, such as a knob, wrench, or swing arm. The locking device 3 also includes a clamping element 33, such as a bolt, pin, or wedge, that can radially pass through the wall of the outer tube and contact the outer wall of the inner tube. The wedge can be made of an elastic or rigid material.

[0077] Specifically, the operating element 32 is designed to move between two working positions. When the user moves or rotates the operating element 32 to the first position, such as the locked position, the operating element 32 directly or indirectly drives the clamping element 33 to move inward through an internal transmission mechanism (such as a thread, inclined plane, or cam), pressing it tightly against the outer wall of the inner tube. Strong friction locks the inner and outer tubes together, preventing relative sliding. When adjustment is needed, the user switches the operating element 32 to the second position, such as the unlocked position. At this time, the operating element 32 drives the clamping element 33 to retract, releasing the clamping force on the inner tube. The inner and outer tubes return to a free sliding state, allowing for telescopic adjustment. For example, the eccentric cam locking type includes an eccentric wheel or cam rotatably disposed within the housing 31. When the operating element 32 is rotated (such as a handle), the protruding portion of the eccentric wheel or cam presses radially against the outer wall of the inner tube or drives the clamping element 33 to press against the inner tube, achieving locking through friction. Reverse rotation releases the lock.

[0078] As another specific and preferred implementation of the locking device, this embodiment provides a structure based on the threaded locking principle, such as... Figures 8 to 10 As shown:

[0079] In this embodiment, the locking device also includes a housing 31 sleeved around the outer tube. The difference lies in that the core of its locking function, namely the operating element 32, is a locking screw. The locking screw is directly screwed onto the housing 31. When the locking screw is turned clockwise or in a specified direction, its rod, driven by the thread, can radially pass through the perforations on the housing 31 and the outer tube wall, moving inward, so that the end of the rod gradually presses against and firmly against the outer wall of the inner tube. Through huge frictional force, the inner tube and the outer tube are locked, preventing them from sliding relative to each other. This state is called locking. When the locking screw is turned in the opposite direction, its rod retracts, and the end of the rod separates from the outer wall of the inner tube, thereby releasing the clamping force and allowing the inner tube to freely expand and contract. This state is called unlocking.

[0080] To optimize the contact and locking effect, a dedicated clamping element 33 can be provided at the end of the locking screw. Specifically, the clamping element 33 can be an independent wear-resistant block, such as a carbide head, fixedly connected to the end of the locking screw; or, to simplify the structure and reduce the number of parts, the end of the locking screw can be directly machined or processed into a shape with clamping function, in which case the clamping element 33 and the locking screw are integrally formed.

[0081] Regarding the screw-fit connection between the locking screw and the housing, there are two common and reliable methods:

[0082] 1. One-piece threaded hole: The threaded hole that mates with the locking screw is directly machined or cast into the housing. This method has the most compact structure and the fewest parts.

[0083] 2. Modular Nut Assembly: An assembly cavity 34 is provided on the housing, and a nut 35 that mates with a locking screw is placed inside the assembly cavity 34. A removable end cap 36, such as an end cap or plug, is typically also provided inside the assembly cavity 34 to encapsulate and secure the nut 35 within the assembly cavity 34, while simultaneously sealing off any remaining space in the assembly cavity 34 to prevent dust ingress and maintain a clean appearance. This method facilitates the selection, replacement, and maintenance of the nut 35 and places lower requirements on the thread strength of the housing material.

[0084] The advantages of this implementation method are:

[0085] Powerful and linearly adjustable locking force: The threaded drive generates a large mechanical gain, and users can intuitively and linearly control the locking force by turning the screws a few times. It is highly adaptable and has extremely high locking reliability.

[0086] Simple and robust structure: The core components are only the housing, locking screw and optional nut. With few moving parts, it is not easy to accidentally loosen in a vibration environment due to the self-locking property of the thread.

[0087] Production and assembly friendly: The continuous stroke of the screw can adaptively compensate for the fit clearance between the inner and outer tubes, reducing the precision requirements for component machining. The modular nut assembly design facilitates production, quality control, and subsequent maintenance.

[0088] Clear operational feedback: The turning operation has a clear sense of torque and stroke, and users can clearly perceive the locked and unlocked status.

[0089] Important Note: The threaded locking structure described in this section, and the locking device structure (operating element being a knob, wrench, or swing arm) described above, are parallel and interchangeable specific embodiments. Both are specific interpretations of the "locking device" technical feature in claims 4 and 7, and both achieve the purpose of reliably locking the telescopic structure. In actual products, the choice can be made flexibly based on cost, design style, and user operating habits. Those skilled in the art should understand that such specific structural substitution based on the same inventive concept fully falls within the protection scope of this invention.

[0090] Specifically, the telescopic principle of the lower frame component 12 is the same as that of the upper frame component 11 described above, and will not be repeated here.

[0091] Specifically, in a structurally optimized embodiment, the two ends of one of the connecting members 2 can be directly connected to the housings 31 of the locking devices 3 installed on the upper frame member 11 and the lower frame member 12, respectively. In this way, the connecting member 2 not only serves a protective function itself, but also connects the housings 31 of the two independent locking devices 3, enhancing the lateral rigidity and overall appearance of the top and bottom areas of the entire door, making the structure more stable and the appearance more harmonious.

[0092] Specifically, regarding the detachable connection between the connecting member 2 and the upper and lower frame members 12, the present invention provides a preferred solution for quick assembly and disassembly. Multiple insertion positions 17 are spaced apart along the length of the upper frame member 11 and the lower frame member 12; these insertion positions 17 can be through holes or blind holes. Both ends of the connecting member 2 are inserted into the corresponding upper and lower insertion positions 17. To achieve quick disassembly, at least one end of the connecting member 2 is designed to contain a movable insert 41, which can move relative to the main body of the connecting member 2, thus having an insertion position and a disengagement position.

[0093] When the plug 41 is released or in its natural state, it is in the plugged position. At this time, a part of the front end of the plug 41, namely the plug part 42, extends out and remains in the plug position 17, thereby locking the connecting member 2 in place.

[0094] When disassembly is required, the user simply operates the plug 41, such as by pressing or pulling, to move it to the disengaged position against resistance. Its plug part 42 will then exit from the plug position 17, and this end of the connecting member 2 will separate from the frame, thus allowing the entire connecting member 2 to be easily removed.

[0095] Specifically, to further improve ease of operation and user experience, the quick-release structure can be designed as an automatic reset type:

[0096] An elastic element 43, such as a spring, can be installed inside the connecting member 2. This elastic element 43 continuously applies an elastic force to the plug 41, and the direction of this force always tends to make the plug 41 return to or remain in the plugged position. At the same time, part of the plug 41 is designed to be exposed outside the connecting member 2, making it easy for the user to pinch or press it with their fingers. During disassembly, the user only needs to use their fingers to overcome the elastic force of the elastic element 43, move the plug 41 to the disengaged position and hold it, and then pull out the connecting rod; after releasing the hand, the plug 41 will automatically spring back to the plugged position under the action of the elastic element 43, ready for the next installation. This design ensures the reliability of the connection and enables quick one-handed operation.

[0097] Specifically, in a preferred embodiment, the movable plug-in 41 is provided at both ends of the connecting member 2.

[0098] Specifically, depending on different product positioning and user needs, all of the multiple connecting components 2 can be installed using the aforementioned detachable quick-release method, allowing each grid bar to be flexibly added or removed, providing maximum adjustment freedom. Of course, a combination of partially fixed and partially detachable components can also be used.

[0099] Specifically, the density of the multiple insertion points 17 provided on the upper frame component 11 and the lower frame component 12 can be determined according to specific production needs. The higher the density, the more connecting components 2 are required, and vice versa.

[0100] Specifically, in terms of material selection, the frame components and connecting components 2 are preferably made of round or square tubes. These types of tubes are easy to process, have high structural strength, and have a regular appearance, making them a common and preferred choice for this type of product. The preferred material is metal.

[0101] Specifically, in the aforementioned embodiment where only one end of the connecting member is equipped with a plug, the other end without a plug is assembled and positioned with the frame member through a simple plug-and-play connection.

[0102] Specifically, in the embodiment where only one end of the connecting member 2 is equipped with a plug, to ensure the connection stability at the other end and avoid shaking or noise due to the fit gap, a connector 37 can be provided at that end. The external dimensions of the connector 37 are designed to form a tight fit (such as a transition fit or a small gap fit) with the plug position on the frame member, which can effectively eliminate the shaking space after installation, thereby eliminating noise caused by vibration or use, and improving the overall texture and user experience of the product.

[0103] Finally, the stability of the quadrilateral frame depends not only on the retractable top and bottom borders, but also on the fixed-length left border component 18 and right border component 19. The left and right border components are firmly connected to the ends of the adjusted top and bottom border components 12, for example, through corner brackets or welding, together forming a stable rectangular frame with good torsional and deformation resistance at any width. This is the cornerstone for the door to reliably bear weight and be used.

[0104] Based on the aforementioned adjustable door body, the present invention also provides a complete household security door frame. In addition to the aforementioned adjustable door body, the door frame includes an assembly structure 5 for hinged or rotatably mounted on one side to a preset position such as a doorway or wall, and a door lock mechanism for locking the door body when closed. The door body, assembly structure 5, and door lock 6 together constitute a complete security product that is ready to use and whose width can be flexibly adapted.

[0105] It should be noted that the core innovation of the household security door frame provided in this application lies in the adjustable door body itself. For other components necessary to constitute a complete door frame product and which are common knowledge in the art, such as the assembly structure 5 and the door lock 6, this specification will not elaborate on their specific structural details.

[0106] Assembly Structure 5: This refers to any mechanical device that allows one side of the door to be rotatably fixed to a predetermined position, such as a door frame, wall, or post, via hinges. Typical implementations include, but are not limited to: pressure mounting using a pressure rod for friction support; permanent fixing by screws to the mounting base to the wall surface; or the use of adjustable universal joints. These structures are widely used in existing technologies, and those skilled in the art can routinely select and apply them according to specific installation environments and usage requirements.

[0107] Door lock 6: This refers to any mechanism that can lock a door in the closed position to prevent it from being accidentally opened. Common forms include: push-button automatic locks, sliding bolt locks, and rotary latch locks. The structure and working principle of these locks are based on existing mature technologies.

[0108] The focus of this invention is on a novel integrated door frame solution incorporating an adjustable door body. The specific installation location and structure of the door lock 6 are not improvements of this invention; those skilled in the art can make conventional selections and adaptations based on the overall product design and user habits. Any conventionally known assembly structure 5 and door lock 6, combined with the adjustable door body of this invention, can constitute the household security door frame product protected by this invention. This descriptive approach aims to clearly define the contribution of this invention and avoid confusion with existing technologies regarding the scope of protection.

[0109] This application also claims protection for an adjustment method, which clearly summarizes the logical steps of using the adjustable door of the present invention. Its specific operation can be more intuitively understood by combining it with actual product design:

[0110] Adjustment steps: The user first operates the telescopic structure located on the upper frame member 11 and / or the lower frame member 12, for example, by loosening the locking device 3, pulling or pushing the frame to adjust the width of the entire door frame to the target size that matches the width of the door opening or passage to be installed, and then re-locking the telescopic structure.

[0111] Adaptation Step: This step is crucial to the intelligence and practicality of this invention. The user needs to determine the number of connecting components 2 to be installed based on the length of the telescopic structure after adjustment. This determination can be achieved in several ways:

[0112] Visual judgment: Observe the span of the area between the upper and lower borders after adjustment, and intuitively judge how many connecting rods are needed to form a safe and uniform gap. For example, ensure that the gap is smaller than the width of an infant's head.

[0113] Scale guidance: As a preferred user interface, length scales can be set on the telescopic structure or frame, and a "Recommended Number of Connecting Rods" table corresponding to different length ranges can be provided in the product manual. Users can quickly determine the required number of connecting rods by referring to the table based on the adjusted scale values.

[0114] Physical adaptation: As described in the aforementioned variant embodiments, the reverse logic of first installing all components and then adjusting them can also be adopted. In this case, the step of determining the quantity is completed by removing the rods during the adjustment process.

[0115] Installation steps: Based on the quantity determined in the adaptation steps, the user installs the corresponding number of detachable connecting components 2, for example, by aligning and inserting them into the plug-in positions 17 using the pressing plug 41, between the upper and lower frame components. If the quantity is greater than before, add more; if the quantity is less than before, remove and store the excess components.

[0116] The method claims protect the aforementioned unique operating procedure adapted to the adjustable door structure, and the sequence of steps and logical relationships reflect the practical value of the invention.

[0117] It should be understood that the frame components described in this invention, particularly the upper and lower frame components as telescopic structures, emphasize the physical structural units that realize the functions of the top and bottom boundaries of the door. Physically, this frame component can be a single integral rod (as described in the preferred embodiment above), or it can be a combined structure composed of multiple side-by-side sub-rods (such as two or more telescopic tubes) structurally fixed or working in concert. As long as these sub-rods collectively define the door frame, install connecting components, and provide length adjustment functionality, they should be considered as a single frame component as defined in this invention. This design using a combined frame component does not depart from the core inventive concept of this invention, which uses at least one pair of oppositely arranged telescopic frames in conjunction with a variable number of connecting components to achieve adaptive adjustment of the door; therefore, it should also fall within the protection scope of this invention.

[0118] The following content further supplements and extends the foregoing preferred embodiments, aiming to more fully illustrate the various specific implementations covered by the technical solution of the present invention. Those skilled in the art will understand that these variations are all based on the same core concept of the present invention, namely, achieving the adjustability and adaptability of the door body through the extension and retraction of the frame members and the coordinated change in the number of connecting members 2; therefore, they should all be included within the protection scope of the present invention.

[0119] 1. Other implementation methods of telescopic structures

[0120] The "telescopic structure" described in this invention is not limited to the aforementioned sleeve-type telescopic tube. Any mechanical structure capable of stepless or stepped adjustment of the linear length is applicable. For example:

[0121] Folding Link Telescopic Structure: This structure may include at least two link segments connected sequentially by hinges. In the retracted state, the link segments fold together, resulting in the shortest overall length. When extension is required, the link segments are unfolded and aligned, and secured by a locking mechanism (such as a knob to lock the hinges), forming an extended rigid rod. This structure is particularly suitable for situations with strict requirements on the retracted length.

[0122] Multi-segment plug-in telescopic structure: This structure consists of multiple pipe segments with progressively varying diameters, connected by direct plugging. Adjacent pipe segments can be secured using elastic bead clamps, threaded connections, or push-button locking mechanisms. Users can adjust the total length by adding or removing the number of plug-in segments as needed.

[0123] 2. Other embodiments of the locking device 3

[0124] There are also several feasible mechanical implementations of the "locking device" that locks the length of the telescopic structure:

[0125] Pin-locking type: Multiple corresponding positioning holes are provided axially spaced on the outer and inner tubes. The locking device includes a pin (such as a spring pin, R-pin, or manual pin) that can be inserted into the overlapping positioning holes. By selecting different positioning holes, stepped length adjustment and fixation can be achieved.

[0126] Wedge-block locking type: This device includes a wedge block disposed within the housing and a drive bolt connected to the operating component. When the operating component is tightened, the drive bolt pushes the wedge block along the inclined plane, causing it to expand in the radial direction, thereby tightly pressing against the outer wall of the inner tube to achieve locking.

[0127] 3. Variations regarding the telescopic combination of border components

[0128] The description of "at least one pair of oppositely arranged frame members being telescopic structures" in this invention has broad applicability. The "pair" can be, as previously mentioned, the upper and lower frame members used to adjust the door width, or the left and right frame members used to adjust the door height. In applications requiring adaptation to specially shaped openings, even both pairs of frame members (i.e., upper, lower, left, and right frame members) can be telescopic structures, thereby achieving free adjustment of the door in both width and height dimensions. Regardless of which pair of frame members the telescopic structure is applied to, the core principle of linkage with the number of detachable connecting members remains unchanged.

[0129] 4. Other methods of detachable connection of connecting components

[0130] "Detachable method" is not limited to the aforementioned plug-in quick-release structure. Other simple and reliable connection methods are also feasible, such as:

[0131] Magnetic connection type: Permanent magnets (such as neodymium iron boron magnets) are embedded in the ends of the connecting members and the insertion positions of the frame members. Magnetic attraction is used to fix the connecting members. Disassembly only requires applying a pulling or torsional force sufficient to overcome the magnetic attraction. This method is extremely simple to operate and has no moving parts.

[0132] Snap-fit ​​connection: A flexible hook (made of plastic or metal) with a bevel or rounded corner is provided at the end of the connecting component. When the end is inserted into the insertion position, the hook is compressed and elastically deformed. After full insertion, the hook springs back to its original position, its hook portion locking onto the inner edge of the insertion position, thus achieving a lock. Disassembly typically requires pressing or actuating a release mechanism to retract the hook, allowing it to be pulled out.

[0133] Threaded connection: External threads are machined at the end of the connecting component, while matching internal threads are machined in the insertion position of the frame component. Secure installation can be achieved by manually tightening the connecting component several turns. For ease of operation, the end of the connecting component may be equipped with a flange or hexagonal head for easy handling or operation with simple tools.

[0134] The detachable connection between the connecting component and the frame component can also be achieved through a simpler through-hole method. For example, the insertion position on the upper frame component is a through hole, while the corresponding insertion position on the lower frame component is a non-through hole. The connecting component is a straight rod, both ends of which can serve as insertion parts, and its length is slightly greater than the vertical distance between the corresponding insertion positions on the upper and lower frame components.

[0135] During installation, the operator moves the connecting component above the door frame, aligning its lower end with the through hole in the upper frame. The connecting component is then inserted vertically downwards, its lower end first passing through the through hole in the upper frame, continuing downwards until it is inserted and stably abuts against the connecting hole in the lower frame. At this point, the upper part of the connecting component remains within the through hole in the upper frame. The inner diameter of the through hole and the outer diameter of the connecting component are fitted with a clearance fit, providing radial positioning for the connecting component while allowing it to maintain its position under a certain frictional force. This completes the installation of a single connecting component, with its upper and lower ends constrained by the through hole and connecting hole respectively, achieving a reliable connection.

[0136] During disassembly, the operator only needs to lift the connecting component from below or pull it upwards directly from above, so that the lower end of the connecting component is disengaged from the connecting hole of the lower frame and completely pulled out from the through hole of the upper frame.

[0137] This method utilizes gravity-assisted alignment and insertion, resulting in an extremely simple structure. It requires no additional moving parts or elastic components, achieving rapid assembly and disassembly solely through the cooperation of rods and holes. This provides another low-cost, highly reliable detachable connection solution. This embodiment also falls within the scope of the "detachable method" described in this application.

[0138] 5. Instructions on adjusting and adapting

[0139] To make adjustments more intuitive and convenient for users, simple guidance labels can be added to the product. For example, length markings can be printed on the surface of the upper and / or lower frame components. Simultaneously, a simple reference table can be included next to the markings or in the product manual, indicating the recommended number of connecting components to be installed within a certain marking range (i.e., a certain width). In this way, after adjusting to the target width, users can immediately know how many connecting rods are needed, achieving a WYSIWYG (What You See Is What You Get) fit.

[0140] 6. Regarding different adjustment operation logics

[0141] The adjustment method of this invention is not fixed or singular. Besides the standard procedure of "adjusting the frame first, then adding or removing connecting rods," there is a faster "adaptive" operation logic: the user can pre-install all or most of the detachable connecting components onto the door. Then, they can directly operate the telescopic structure to adjust the door width to match the installation space. During the width contraction process, as the spacing between the connecting components decreases, the excess connecting components will be compressed. The user only needs to remove these compressed rods. This method reduces the steps of pre-calculating the quantity and relies more on intuitive operational feedback.

[0142] In summary, the various specific embodiments and variations listed above are all specific interpretations and examples of the technical solutions defined in the claims of this invention. Once those skilled in the art understand the core concept of this invention—that is, achieving flexible adjustment of the door size and adaptive internal structural density through the coordinated cooperation of a retractable frame and a variable number of connecting components—it is entirely possible to combine, replace, or modify the specific implementation forms, connection relationships, or operation steps of the above-mentioned components without any inventive effort. All such variations should be considered to fall within the protection scope defined by the claims of this invention.

[0143] The adjustable door and household security door frame provided by this invention overcomes the fundamental limitations of traditional security door frames, which have fixed sizes and poor adaptability, by designing the door frame as a telescopic structure and innovatively allowing the number of internal connecting components to be adjusted accordingly. This solution enables smooth and continuous adjustment of the door width over a wide range, allowing users to perfectly adapt to various widths of installation openings with just one product, completely eliminating the problems caused by measurement errors and the cost and storage hassles of purchasing multiple specifications. During adjustment, by increasing or decreasing the number of connecting components, the uniform and safe spacing of the internal grilles is always maintained, ensuring effective protection performance at any width while avoiding structural redundancy or material waste. Its quick-release connection structure design makes adjustment extremely simple and fast, requiring no tools and greatly improving the user experience. Furthermore, the overall structural design is scientifically sound, the telescopic mechanism locks reliably, and the fixed frame ensures overall stability, allowing the product to achieve convenience and save packaging volume without sacrificing the robustness and durability necessary for a security product. In summary, this invention successfully provides an innovative home protection solution that truly achieves "multi-functionality, flexibility, and security," possessing outstanding practical value and significant market competitiveness.

[0144] The specific embodiments, drawings, and modifications described in this specification are only for assisting those skilled in the art in understanding the technical content and implementation of the present invention. Their purpose is exemplary and explanatory, and they do not constitute any limitation on the scope of protection of the present invention.

[0145] The scope of protection of this invention is determined by the claims finally granted by the State Intellectual Property Office. Any equivalent substitution, simple variation of technical features, or combination of elements between different embodiments based on the core concept of this invention—"achieving door size adjustment and adaptive internal filling density through the synergy of a retractable frame and a variable number of detachable connecting components"—should be considered within the scope of protection of this invention, as long as it does not depart from the technical solution defined by the claims. The references to background art and prior art components in the specification, and the avoidance of excessive elaboration on certain common knowledge, do not affect the description and support of the innovative technical solution of this invention itself.

Claims

1. An adjustable door, characterized by The adjustable door body comprises: a frame structure composed of a plurality of frame members arranged circumferentially, wherein at least one pair of oppositely arranged frame members is a telescopic structure with adjustable length; a plurality of connecting members (2) arranged in the area surrounded by the frame structure, both ends of each connecting member (2) being used for connecting with the pair of oppositely arranged frame members; at least part of the plurality of connecting members (2) is connected with the frame members in a detachable manner, and the different length states of the telescopic structure are matched by changing the number of detachable connecting members (2) installed on the pair of frame members.

2. The adjustable door body according to claim 1, wherein: the frame structure is a quadrilateral frame; the pair of frame members with telescopic structure are upper frame members (11) and lower frame members (12).

3. The adjustable door body according to claim 2, wherein: the telescopic structure is a telescopic pipe structure.

4. The adjustable door body according to claim 3, wherein: the telescopic pipe structure comprises a first pipe segment (13) and a second pipe segment (14) which are telescopically connected with each other, and a locking device (3) for locking the relative position of the first pipe segment (13) and the second pipe segment (14).

5. The adjustable door body according to claim 4, wherein: the first pipe segment (13) is an inner pipe, and the second pipe segment (14) is an outer pipe which is telescopically arranged outside the inner pipe; the telescopic pipe structure further comprises a limiting structure for preventing the inner pipe from completely separating from the outer pipe.

6. The adjustable door body according to claim 5, wherein: the limiting structure comprises a first limiting part (15) arranged at the end of the insertion end of the inner pipe, and a second limiting part (16) arranged inside the outer pipe; when the inner pipe is extended to the limit position relative to the outer pipe, the first limiting part (15) and the second limiting part (16) are engaged or interfered to prevent the inner pipe from separating from the outer pipe.

7. The adjustable door body according to claim 4, wherein: the locking device (3) comprises a housing (31) arranged outside the outer pipe, an operating member (32) movably arranged in the housing (31), and a pressing member (33) capable of penetrating through the outer pipe and abutting against the outer wall of the inner pipe; the operating member (32) is movable between a first position and a second position when being operated, when being in the first position, the pressing member (33) is pressed against the outer wall of the inner pipe under the drive of the operating member (32) to lock the telescopic structure; when being in the second position, the pressing member (33) is released from pressing against the outer wall of the inner pipe to allow the telescopic structure.

8. The adjustable door body according to claim 7, wherein: both ends of one of the connecting members (2) are connected with the housings (31) of the locking devices (3) on the upper frame members (11) and the lower frame members (12), respectively.

9. The adjustable door body according to claim 2 or 3, wherein: A plurality of insertion sites (17) are provided on the upper frame member (11) and the lower frame member (12) respectively; Both ends of the connecting member (2) are detachably connected with the corresponding insertion sites (17), and at least one end of the connecting member (2) is provided with a movable plug-in part (41); The plug-in part (41) can move between the insertion position and the disengagement position relative to the main body of the connecting member (2); When the plug-in part (41) is in the insertion position, the insertion part (42) of the plug-in part (41) is in a state capable of being inserted or retained in the corresponding insertion site (17); When the plug-in part (41) is operated to move to the disengagement position, the insertion part (42) of the plug-in part (41) exits the corresponding insertion site (17), thereby realizing the disassembly of the corresponding end of the connecting member (2).

10. The adjustable door according to claim 9, wherein: Both ends of the connecting member (2) are provided with the movable plug-in part (41).

11. The adjustable door according to claim 9, wherein: The connecting member (2) further comprises an elastic member (43) which applies an elastic force to the plug-in part (41) tending to move or keep the plug-in part (41) in the insertion position.

12. The adjustable door according to claim 11, wherein: The plug-in part (41) has a part exposed outside the connecting member (2) for operation; During operation, the plug-in part (41) is moved to the disengagement position against the elastic force of the elastic member (43); After the operation is removed, the plug-in part (41) is automatically reset to the insertion position under the action of the elastic member (43).

13. The adjustable door according to claim 2 or 3, wherein: All of the plurality of connecting members (2) are detachably connected with the upper frame member (11) and the lower frame member (12).

14. The adjustable door according to claim 2 or 3, wherein: The frame members and / or the connecting members (2) are circular tubes or square tubes.

15. The adjustable door according to claim 2 or 3, wherein: The frame structure further comprises a left frame member (18) and a right frame member (19) connected with the upper frame member (11) and the lower frame member (12); The left frame member (18) and the right frame member (19) are fixed in length and together with the upper frame member (11) and the lower frame member (12) form a stable quadrilateral frame.

16. A home security door guard comprising: Comprising: The adjustable door according to any one of claims 1 to 15; An assembly structure (5) provided on one side of the door body for rotatably assembling the door body at a predetermined position; A door lock (6) for locking the door body in a closed state.

17. A method for adjusting the width of the adjustable door according to claim 1, characterized in that, Comprising the following steps: An adjusting step: operating the telescopic structure of the at least one pair of frame members to adjust the frame structure to a target width; An adapting step: determining the adaptive number of detachable connecting members (2) to be installed according to the length state of the telescopic structure after adjustment; An adjusting step: operating the telescopic structure of the at least one pair of frame members to adjust the frame structure to a target width; An adapting step: determining the adaptive number of detachable connecting members (2) to be installed according to the length state of the telescopic structure after adjustment. Mounting step: mounting the adapted number of detachable connection members (2) to the pair of frame members.

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