Chain unit for gauze isolation device

Abstract

The invention provides a chain unit for a gauze isolation device, the chain unit comprises a limiting part and a connecting part, the limiting part is provided with a limiting groove and at least one pivoting hole, and the side surface of the limiting part is provided with a shielding convex rib; the connecting part is provided with at least one pivoting convex part which can be accommodated in the limiting groove of the adjacent chain unit in a pivoting manner, and the pivoting convex part is correspondingly pivoted in the pivoting hole of the adjacent chain unit, so that a plurality of chain units can be pivoted to form a bendable chain structure, and the bendable chain structure is applied to the gauze isolation device; the door body unit of the gauze isolation device can be guided to slide in the horizontal direction so as to unfold or fold the gauze screen, and therefore the effect of effectively preventing outdoor mosquitoes from entering a room is achieved.

Description

Technical Field

[0001] The invention relates to a chain unit structure, in particular to a chain unit used in a gauze isolation device to guide and stabilize the sliding of a gauze. Background Art

[0002] Many buildings now install screens to prevent mosquitoes from entering. Among these screens, concealed screens are becoming increasingly popular in various residential and commercial spaces due to their ease of storage, simple appearance, and ability to maintain visibility through door and window openings.

[0003] However, the structural design of existing concealed screens often creates a thin gap between the screen and the door or window frame or rail, allowing mosquitoes to enter the room through the gap at the bottom. This problem is particularly noticeable when the screen is frequently opened and closed or is subject to wind pressure. Summary of the Invention

[0004] The technical solution adopted by the present invention is: a chain unit for a gauze isolation device, any two adjacent chain units are pivotally connected to each other, and is characterized in that, the chain unit includes: a limiting portion, the limiting portion having a limiting groove and at least one pivot hole, wherein a blocking rib is protruded from one side of the limiting portion, and the upper edge and lower edge of the blocking rib are respectively at a distance from the upper edge and lower edge of the limiting portion; and a connecting portion, the connecting portion is connected to the limiting portion, and the connecting portion is provided with at least one pivot protrusion; the connecting portion of one chain unit is pivotally arranged in the limiting groove of the limiting portion of the other chain unit, and the pivot protrusion of one chain unit is correspondingly pivoted in the pivot hole of the other chain unit.

[0005] The object of the present invention is to provide a chain unit which can be assembled to form a chain structure and applied to a gauze isolation device, so as to improve the deficiencies of the existing gauze isolation device in terms of ease of use and protection.

[0006] In order to achieve the above-mentioned purpose, the chain unit of the present invention includes a limiting portion and a connecting portion, wherein the limiting portion has a limiting groove and at least one pivot hole, and a shielding rib is protruded from the side surface of the limiting portion, and the upper edge and lower edge of the shielding rib are respectively at a distance from the upper edge and lower edge of the limiting portion; the connecting portion is provided with at least one pivoting protrusion, which is configured to be pivotally arranged and accommodated in the limiting groove of another adjacent chain unit, and the pivoting protrusion is correspondingly pivoted in the pivot hole of the adjacent chain unit, so that the chain units can be linked to each other to form a bendable chain structure.

[0007] The gauze isolation device of the present invention comprises an outer frame unit, a door unit, a gauze screen, and a guide unit. The door unit is slidably accommodated within the outer frame unit. The guide unit is disposed within the door unit and comprises two chain structures, each comprising a plurality of pivotally linked chain units that together define a sliding groove. The gauze screen is disposed on the door unit and slidably disposed within the sliding groove, allowing it to be horizontally expanded and retracted as the door unit slides.

[0008] The present invention offers the following benefits: The chain structure, composed of multiple pivotally connected chain units, offers excellent flexibility and guidance. When the user pulls the movable frame of the door unit, the chain structure guides the screen to slide smoothly within the sliding groove, achieving expansion and folding functions. This eliminates the need for a raised floor frame, enhancing barrier-free accessibility. Furthermore, the chain units are tightly connected by shielding ribs, significantly reducing gaps at the chain joints and effectively preventing insects from entering, enhancing the airtight seal. Furthermore, a guide mechanism is provided to return the screen to its original position should it be forced out of the sliding groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional schematic diagram of a gauze isolation device according to one embodiment of the present invention.

[0010] Figure 2 2 is a front view of a gauze isolation device according to one embodiment of the present invention.

[0011] Figure 3 2 is a schematic cross-sectional view of a gauze isolation device according to one embodiment of the present invention.

[0012] Figure 4 and Figure 5 Schematic diagrams from different angles of a retracting mechanism according to one embodiment of the present invention.

[0013] Figure 6 Schematic diagram of a chain structure and a gauze screen according to one embodiment of the present invention.

[0014] Figure 7 and Figure 8 2 is a schematic three-dimensional diagram from different angles of a chain unit according to one embodiment of the present invention.

[0015] Figure 9 FIG2 is a perspective schematic diagram of two chain units pivotally connected to each other according to one embodiment of the present invention.

[0016] Figure 10A and Figure 10B The state changes of the chain structure are respectively when the mesh screen is in the expanded state and the folded state.

[0017] Figure 11 It is a schematic diagram of the structural design of the vertical material discharge and the lower track.

[0018] Figures 12 to 14 2 is a schematic structural diagram of a chain unit according to another embodiment of the present invention.

[0019] Explanation of Figure Numbers

[0020] 1: outer frame unit; 11: vertical material; 12: upper track; 13: lower track; 130: slide groove; 131: guide groove; 132: extension part; 133: wire shielding part.

[0021] 2: Door unit; 21: Retracting mechanism; 211: Retracting shaft; 212: Actuating member; 213: Adjusting rod; 22: Movable frame.

[0022] 3: mesh screen; 4: guide unit.

[0023] 5: chain structure; 51: chain unit; 51': chain unit; 511: limiting portion; 511a: notch portion; 511b: upper edge; 511c: lower edge; 512: connecting portion; 512a: missing corner portion; 513: limiting groove; 514: pivot hole; 515: pivot protrusion; 52: shielding rib; 52a: first side portion; 52b: second side portion; 52c: extension portion; 52d: stop portion; 52e: upper edge; 52f: lower edge; 521: abutment portion; 522: recessed portion; 53: stop portion; 54: pivot space; 56: sliding groove.

[0024] 6: First line adjustment seat group; 6a: First line adjustment seat; 6b: First line adjustment seat; 6c: First fixed line; 61: Seat frame; 62: Adjustment shaft.

[0025] 7: Second line adjustment seat group; 7a: Second line adjustment seat; 7b: Second fixed line; 7c: Spring structure.

[0026] A: first section; B: second section; D1: distance; D2: distance. DETAILED DESCRIPTION

[0027] To facilitate understanding of the above and other objectives, features, and advantages of the present invention, preferred embodiments of the present invention are described below in detail with reference to the accompanying drawings. Furthermore, directional terms used herein, such as up, down, top, bottom, front, back, left, right, inside, outside, side, periphery, center, horizontal, transverse, vertical, longitudinal, axial, radial, topmost, or bottommost, are intended solely to refer to the directions of the accompanying drawings. Therefore, these directional terms are intended to illustrate and facilitate understanding of the present invention and are not intended to limit the present invention.

[0028] The present invention is a chain unit for a gauze isolation device. In specific implementation, the gauze isolation device is a door and window device such as a screen window or a screen door.

[0029] Please refer to Figures 1 to 3 , which respectively show a perspective schematic diagram, a front view, and a cross-sectional schematic diagram of a screen isolation device according to one embodiment of the present invention. The screen isolation device of this embodiment mainly includes: an outer frame unit 1, a door unit 2 accommodated in and slidable relative to the outer frame unit 1, and a screen 3 and a guide unit 4 disposed within the door unit 2.

[0030] The outer frame unit 1, as a supporting structure for an integral structure, can be used in door or window frames. It primarily comprises two vertically extending vertical members 11 arranged parallel to each other, an upper track 12 connected to the upper ends of the two vertical members 11, and a lower track 13 connected to the lower ends of the two vertical members 11. The door unit 2 comprises a retracting mechanism 21 disposed within one of the vertical members 11 and a movable frame 22 slidably disposed within the outer frame unit 1. One end of the screen mesh 3 is fixedly connected to the retracting mechanism 21 for storage when not in use, while the other end is connected to the movable frame 22. As the movable frame 22 slides away from the retracting mechanism 21, the screen mesh 3 is pulled and unfolded from the retracting mechanism 21. Conversely, as the movable frame 22 moves toward the retracting mechanism 21, the retracting mechanism 21 automatically retracts the screen mesh 3, concealing it within the retracting mechanism 21 and achieving a closed position.

[0031] Specifically, if Figure 1 、 Figure 4 and Figure 5 As shown, the reeling mechanism 21 mainly includes a reeling shaft 211, an actuator 212 and an adjusting rod 213. The reeling shaft 211 is connected to the mesh screen 3, and a torsion spring is provided inside the reeling shaft 211 to provide elastic restoring force. The adjusting rod 213 is used to be linked with the actuator 212, and the actuator 212 is sleeved on the reeling shaft 211 to drive the reeling shaft 211 to rotate to adjust the tightness of the torsion spring. The adjusting rod 213 is used to be linked with the actuator 212, and its two ends are exposed outside the outer frame unit 1. The user can use a screwdriver or corresponding tool to rotate the adjusting rod 213 from either side of the outer frame unit 1, and then drive the actuator 212 to rotate to tighten or loosen the torsion spring inside the reeling shaft 211, thereby adjusting the tension of the mesh screen 3 according to actual needs.

[0032] like Figure 1 and Figure 6As shown, the guide unit 4 includes two chain structures 5 arranged opposite each other, which are installed on the lower track 13. The edge of the mesh screen 3 is arranged between the two chain structures 5, so that the chain structures 5 can guide and stably support the edge of the mesh screen 3 during the process of expanding or contracting the mesh screen 3. In addition, the chain structures 5 maintain continuous guidance of the mesh screen 3 during sliding, further improving the structural stability.

[0033] Specifically, each chain structure 5 is composed of a plurality of chain units 51 connected end to end in a pivotal manner, and the overall structure has bendability and interlocking properties. Figures 7 to 9 As shown, each chain unit 51 includes a stopper 511 and a connecting portion 512, which are connected to each other. The stopper 511 is provided with a stopper slot 513 and a pair of pivot holes 514 disposed on either side of and connected to the stopper slot 513. The connecting portion 512 is provided with a pivoting protrusion 515 that is inserted into the pivot holes 514. By inserting the connecting portion 512 of one chain unit 51 into the stopper slot 513 of another adjacent chain unit 51 and pivoting the pivoting protrusion 515 into the pivot hole 514 of the adjacent chain unit 51, the chain units 51 are pivotally connected to each other, thereby forming an integral, bendable chain structure.

[0034] Furthermore, if Figure 9 As shown, the limiting portion 511 has a notch 511a extending toward the opening of the limiting slot 513, while the connecting portion 512 has a notched portion 512a at a corner thereof away from the limiting slot 513. The notched portion 512a corresponds to the notch 511a of the adjacent chain unit 51 and together define a pivoting space 54 for the chain units 51 to pivot. This prevents interference or jamming between the two chain units 51 when bent to a certain angle, ensuring smooth pivoting of the chain structure and enhancing overall operational fluency.

[0035] In one embodiment, if Figures 7 to 9As shown, a shielding rib 52 is provided on one side of the limiting portion 511. The upper edge 52e of the shielding rib 52 is spaced a distance D1 from the upper edge 511b of the limiting portion 511, and the lower edge 52f of the shielding rib 52 is spaced a distance D2 from the lower edge 511c of the limiting portion 511. In this embodiment, distance D2 is greater than distance D1, thereby providing more stable support for the edge of the mesh screen 3. The shielding rib 52 has opposing first and second side portions 52a, 52b. The first side portion 52a is farther from the connecting portion 512 and has an inclined design, while the second side portion 52b is closer to the connecting portion 512 and has a vertical design. An abutment portion 521 is protruding from the first side portion 52a. Through the above design, when two chain units 51 are pivotally connected to each other, the abutment portion 521 of any chain unit 51 can abut against the lower edge surface of the second side portion 52b of the adjacent chain unit 51, and form a three-dimensional fitting interface when the chain structure is bent or non-bending, thereby effectively shielding the connecting gaps between the chain units 51 and preventing mosquitoes from penetrating into the indoor space through the gaps.

[0036] Please refer again Figure 6 and Figure 9 The shielding rib 52 includes an extension portion 52c and a stop portion 52d, wherein the extension portion 52c extends horizontally from the surface of the limiting portion 511, and the stop portion 52d is connected to the extension portion 52c and forms a distance with the corresponding surface of the limiting portion 511. The stop portion 52d extends downward from the side edge of the extension portion 52c away from the limiting portion 511 and is inclined at an angle relative to the limiting portion 511. The main function of the stop portion 52d is to provide guidance and restriction functions for the edge of the mesh screen 3 during the unfolding and sliding process of the mesh screen 3. Specifically, when the two chain structures 5 are respectively located on opposite sides of the mesh screen 3, their respective shielding ribs 52 correspond to each other, and the stop portions 52d will jointly define a sliding groove 56 for the edge of the mesh screen 3 to slide through. During normal use, the edge of the screen 3 is positioned within the sliding groove 56. The stopper 52d provides guidance and lateral support during sliding movement. Furthermore, because the distance D2 between the shielding rib and the upper and lower edges of the stopper in this embodiment is greater than the distance D1, the screen 3 is prevented from escaping the sliding groove 56 during sliding movement. If the screen 3 escapes from the sliding groove 56 due to external forces (e.g., strong winds or collisions), the stopper 52d acts as a guiding slope, forcing the screen 3 back into the sliding groove 56, thereby enhancing its stability and protective effect.

[0037] Please also refer to Figure 6 、 Figure 10A and Figure 10B ,in Figure 10A and Figure 10BThe following diagrams illustrate the state changes of the chain structure 5 when the mesh screen 3 is in the expanded and retracted states, respectively. To clearly illustrate the structural transformation of the chain structure 5 during dynamic motion, in this embodiment, the chain structure 5 is divided into a first section A and a second section B. The first section A refers to the portion slidably accommodated within the interior space of the movable frame 22, while the second section B refers to the portion slidably located on the lower track 13 of the outer frame unit 1. As the movable frame 22 slides toward the retracting mechanism 21, the length of the first section A of the chain structure 5 gradually increases, meaning that more chain units 51 enter the movable frame 22 and are accommodated. Simultaneously, the second section B shortens, indicating that the chain structure 5 gradually bends and is partially retracted within the movable frame 22. Conversely, as the movable frame 22 slides away from the retracting mechanism 21, the chain units 51 in the first section A move out of the movable frame 22 and expand along the lower track 13, causing the length of the second section B to increase. This segment length conversion mechanism ensures that the chain structure 5 can change shape as the movable frame 22 moves, while maintaining the continuity of the bottom guide and support at any sliding position, keeping the mesh screen 3 stably expanded or retracted during the sliding process.

[0038] Please also refer to Figure 2 、 Figure 5 、 Figure 10A and Figure 10B In order to further enhance the smoothness of the sliding of the door unit 2 and prevent the movable frame 22 from tilting, this embodiment includes a first line adjustment seat group 6 and a second line adjustment seat group 7 in the guide unit. The first line adjustment seat group 6 includes two line adjustment seats (for example, the first line adjustment seat 6a and the first line adjustment seat 6b) and a first fixed line 6c. The first line adjustment seat 6a is arranged at the upper end of one of the vertical materials 11, and the first line adjustment seat 6b is arranged at the lower end of the other vertical material 11. The first line adjustment seat 6a and the first line adjustment seat 6b each include a seat frame 61, and an adjustment shaft 62 pivotally arranged in the seat frame 61 and rotatable relative to the seat frame. The first fixed line 6c is passed through the interior of the movable frame 22, and its two ends are respectively connected to the adjustment shafts 62 of the first line adjustment seat 6a and the first line adjustment seat 6b. The tension of the first fixed line 6c can be adjusted by rotating the adjustment shaft 62.

[0039] The second line adjustment seat group 7 includes a second line adjustment seat 7a and a second fixed line 7b arranged on one of the vertical materials 11. The second line adjustment seat 7a also has a frame and an adjustment shaft pivotally mounted thereon. The second fixed line 7b is passed through the interior of the movable frame 22, one end of which is connected to the adjustment shaft of the second line adjustment seat 7a, and the other end is connected to one end of the spring structure 7c, and the other end of the spring structure 7c is connected to the end of the chain structure 5 located in the movable frame 22. The spring structure 7c can maintain the stability of the tension of the second fixed line 7b during the sliding of the door unit, so as to respond to the tension change during the movement of the chain structure and further prevent the movable frame 22 from shaking or tilting.

[0040] In this embodiment, the first fixing line 6c and the second fixing line 7b are arranged in a staggered manner in the internal space of the movable frame 22. The two fixing lines form a restraining effect in different directions, which effectively restricts the movable frame 22 from being tilted during the sliding process, thereby ensuring stability during the sliding process. Therefore, the user can position the movable frame 22 to be fully open (such as Figure 10B As shown), all off (as shown Figure 10A as shown) or any intermediate position (as Figure 2 By adjusting the tension of the first fixed line 6c and the second fixed line 7b, the movable frame 22 can be maintained in a specific position without sliding arbitrarily when no force is applied, thereby increasing the operability and convenience of the present invention.

[0041] Please also refer to Figure 10A and Figure 11 In one embodiment, the first fixing wire 6c and the second fixing wire 7b are respectively accommodated in the upper rail 12 in their upper paths, while their lower paths are set in the lower rail 13. In order to integrate the sliding path of the chain structure 5 in the lower rail 13 with the configuration of the first fixing wire 6c, the lower rail 13 is provided with two slide grooves 130 and two guide grooves 131. The slide grooves 130 are used for the sliding of the chain structure 5, and the guide grooves 131 are used to accommodate the first fixing wire 6c. To prevent the first fixing wire 6c from being exposed during use, extensions 132 are provided on both sides of the guide grooves 131, and each extension 132 has a wire shielding portion 133 protruding horizontally. A gap is left between the corresponding wire shielding portions 133, allowing the first fixing wire 6c to be inserted into the guide groove 131 through the gap and shielded by the wire shielding portion 133. This design not only aesthetically shields the wires but also helps prevent dust.

[0042] In the present invention, the chain structure can also be designed in different shapes. Figures 12 to 14 As shown, the basic structure of the chain unit 51 'is similar to Figures 7 to 9The chain units 51 shown are substantially the same, so the common parts are indicated by the same symbols, and only the structural differences are described below. The shielding rib 52 of the chain unit 51' includes an abutment portion 521 and a recessed portion 522 arranged on opposite sides thereof, an extension portion 52c extending horizontally from the surface of the limiting portion 511, and a stop portion 53 extending upward from a side edge of the extension portion 52c away from the limiting portion 511. The surfaces corresponding to the stop portion 53 and the extension portion 52c are arranged at a distance from each other and are arranged in parallel in this embodiment. When the two chain units 51' are pivotally connected to each other, the abutment portion 521 of one of the chain units 51' can abut against the recessed portion 522 of the adjacent chain unit 51', thereby forming a tight joint after the pivoting to avoid the formation of gaps. In a chain structure composed of multiple pivotally connected chain units 51', when two chain structures are adjacent and juxtaposed, their stoppers 53 can be aligned with each other and together define a sliding groove for the gauze screen to slide, further enhancing the stability of the overall structure. Since the chain unit 51' has the same function and application as the chain unit 51, a repeated description will not be given.

[0043] As described above, the chain units provided by the present invention can be assembled into chain structures of varying lengths depending on the size of the frame. The flexible design of the chain structure allows the screen to slide and unfold along the chain structure's sliding grooves and lower rails. This eliminates the need for a high bottom frame, provides a smooth passage surface, facilitates barrier-free spaces, and reduces the risk of tripping. Furthermore, the chain units are tightly connected by mating structures such as the extended and abutting portions of the shielding ribs. This not only significantly reduces gaps at the chain unit connections but also effectively blocks mosquitoes from entering, thereby enhancing overall protection and airtightness. If the screen is dislodged by external forces, the shielding ribs guide it back into the sliding grooves, enhancing its durability and anti-detachment stability. Furthermore, the staggered arrangement of the fixing wires within the movable frame creates a mutual restraint during sliding, keeping the movable frame in place and preventing it from shifting or tilting, ensuring smooth and stable deployment and folding of the screen.

[0044] Although the present invention has been disclosed with reference to preferred embodiments, this is not intended to limit the present invention. Anyone skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the appended patent applications.

Claims

1. A chain unit for a gauze isolation device, wherein any two adjacent chain units are pivotally connected to each other, characterized in that: in, The chain unit includes: a limiting portion having a limiting groove and at least one pivot hole, wherein a shielding rib is protruded from a side surface of the limiting portion, and an upper edge and a lower edge of the shielding rib are respectively spaced apart from an upper edge and a lower edge of the limiting portion; and a connecting portion connected to the limiting portion, and provided with at least one pivoting protrusion; The connecting portion of one chain unit is pivotally disposed in the limiting groove of the limiting portion of the other chain unit, and the pivoting protrusion of one chain unit is correspondingly pivotally disposed in the pivoting hole of the other chain unit.

2. A chain unit for a gauze isolation device according to claim 1, characterized in that: in, The shielding rib includes an extension portion and a stop portion. The extension portion extends from the surface of the limiting portion, and the stop portion is connected to a side edge of the extension portion away from the limiting portion.

3. A chain unit for a gauze isolation device according to claim 1, characterized in that: in, The shielding rib has a first side portion and a second side portion, wherein the first side portion corresponds to the second side portion, the first side portion is farther away from the connecting portion than the second side portion, and the first side portion is protruded with a contact portion, which is configured to contact the lower edge surface of the second side portion of the other chain unit.

4. A chain unit for a gauze isolation device according to claim 1, characterized in that: in, The limiting portion is provided with a notch portion, and the connecting portion is provided with a missing corner portion. The missing corner portion is arranged corresponding to the notch portion of the other chain unit, and a pivoting space for pivoting is defined by the notch portion and the missing corner portion.

5. A chain unit for a gauze isolation device according to claim 2, characterized in that: in, The stopping portion is parallel to the limiting portion or the stopping portion is inclined at an angle relative to the limiting portion.

6. A chain unit for a gauze isolation device according to any one of claims 1 to 5, characterized in that : Several chain units are pivotally connected to each other to form a chain structure, and the chain structure is arranged in a gauze isolation device, and the gauze isolation device includes: an outer frame unit; a door unit, the door unit being accommodated in the outer frame unit; a guide unit disposed in the door unit, wherein the guide unit comprises two chain structures disposed at the bottom of the door unit, and a sliding groove is defined by the two chain structures; and A gauze screen is arranged on the door unit and is slidably arranged in the sliding groove.

7. A chain unit for a gauze isolation device according to claim 6, characterized in that: in, The door body unit is provided with a retracting mechanism and a movable frame. The retracting mechanism is arranged on one side of the outer frame unit. The movable frame can be slidably arranged in the outer frame unit relative to the retracting mechanism, wherein one end of the mesh screen is connected to the retracting mechanism, and the other end is connected to the movable frame.

8. The chain unit for a gauze isolation device according to claim 6, characterized in that: in, The guiding unit comprises: a first wire adjustment seat group, the first wire adjustment seat group including two first wire adjustment seats and a first fixed line, wherein the two first wire adjustment seats are respectively arranged at the upper end and the lower end of the vertical material, and the first fixed line passes through the movable frame, and the two ends of the first fixed line are respectively connected to the two first wire adjustment seats; and a second wire adjustment seat assembly, comprising a second wire adjustment seat and a second fixed wire, wherein the second wire adjustment seat is disposed on a vertical material, the second fixed wire passes through the movable frame, one end of the second fixed wire is connected to the second wire adjustment seat, and the other end of the second fixed wire is connected to one end of the chain structure disposed in the movable frame via a spring structure; The first fixing line and the second fixing line are arranged alternately in the movable frame.

9. A chain unit for a gauze isolation device according to claim 8, characterized in that: The first line adjustment seat and the second line adjustment seat respectively include: a seat frame, the seat frame being arranged on the corresponding vertical material; and an adjustment shaft pivotally mounted on the seat frame and capable of rotating relative to the seat frame; The adjustment shaft is connected to the corresponding end of the fixing line, and the adjustment shaft can be rotated to adjust the tension of the first fixing line and the second fixing line.

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