Improved linkage sliding door

Abstract

An improved linkage sliding door includes an upper track, a first door panel, a second door panel, a third panel, a gear, a first gear rack, a second gear rack and at least one positioning roller. The upper ends of the first, second, and third door panels are mounted on the upper track. The gear is pivotally disposed at the upper end of the second door panel. The first and second gear racks are respectively fixed to the upper ends of the first and third door panels. The gear meshes with both the first and second gear racks, forming a linkage mechanism that enables a synchronized movement of multiple door panels. The positioning roller is disposed at the upper end of the third door panel, and is contact with an inner sidewall of the upper track. As the positioning roller rolls along the inner sidewall, it guides the third door panel to move smoothly and stably, preventing swaying, shaking, or gear skipping, so as to ensure that the door panels operate in a stable and smooth manner.

Description

Improved linkage sliding door This invention relates to a linkage sliding door, and more particularly to a frameless improved linkage sliding door. Linked sliding doors can be used in shower doors and other similar devices. Existing linked sliding doors already have a multi-door linkage function. When a user pushes one door panel, the linkage mechanism enables the linkage of multiple doors. The existing linkage mechanism consists of gears and racks. Although the gears and racks are precisely matched, there are problems such as door panels easily wobble, shake, or even skipping teeth, making the door panels move less smoothly. The technical problem to be solved by the present invention is to provide an improved linkage sliding door that can assist in the positioning of the door panel, without causing swaying, shaking, or skipping teeth, so that the door panel can move stably and smoothly. To address the aforementioned technical problems, this invention provides an improved interlocking sliding door, comprising: an upper rail having a first groove, a second groove, and a third groove; a first door panel having its upper end disposed in the first groove; a second door panel having at least one first pulley disposed at its upper end, the at least one first pulley being slidably engaged in the second groove; and a third door panel having at least one second pulley disposed at its upper end, the at least one second pulley being slidably engaged in the third groove. A gear pivotally mounted on the upper end of the second door panel; a first rack fixed to the upper end of the first door panel; a second rack fixed to the upper end of the third door panel, the gear meshing with the first rack and the second rack to form a linkage mechanism; and at least one positioning roller disposed on the upper end of the third door panel, the at least one positioning roller contacting an inner sidewall of the upper rail, the positioning roller being able to roll on the inner sidewall of the upper rail. The beneficial effects of this invention are as follows: The improved interlocking sliding door provided by this invention includes an upper rail, a first door panel, a second door panel, a third door panel, a gear, a first rack, a second rack, and at least one positioning roller. The upper ends of the first, second, and third door panels are disposed on the upper rail. The gear is pivotally mounted on the upper end of the second door panel. The first and second racks are respectively fixed to the upper ends of the first and third door panels. The gear meshes with the first and second racks to form an interlocking mechanism, enabling multi-door interlocking. The positioning roller is disposed on the upper end of the third door panel and contacts the inner wall of the upper rail. The positioning roller can roll on the inner wall of the upper rail, guiding the stable movement of the third door panel, preventing swaying or shaking. Furthermore, the gear, the first rack, and the second rack can engage tightly without skipping teeth, allowing the door panels to move stably and smoothly. To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. The following specific embodiments illustrate the relevant implementation methods disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention. In addition, the term "or" as used herein may include, depending on the actual situation, any combination of any one or more of the associated listed items. [Example] Please refer to Figures 1 to 6. The present invention provides an improved linkage sliding door, including an upper rail 1, a first door panel 2, a second door panel 3, a third door panel 4, a gear 5, a first rack 6, a second rack 7, and at least one positioning roller 30. The upper rail 1 can be an extruded aluminum structure, but is not limited thereto. The upper rail 1 can be appropriately fixed to a building. The upper rail 1 has a first groove 11, a second groove 12, and a third groove 13 (as shown in Figures 3 and 5). The first groove 11, the second groove 12, and the third groove 13 extend along the length of the upper rail 1, with the second groove 12 located between the first groove 11 and the third groove 13. The first groove 11, the second groove 12, and the third groove 13 can be pulley grooves, fixing grooves, etc. In this embodiment, the first groove 11 is a fixing groove, and the second groove 12 and the third groove 13 are pulley grooves. A first door panel 2, a second door panel 3, and a third door panel 4 are disposed on an upper rail 1, with the second door panel 3 located between the first door panel 2 and the third door panel 4. In this embodiment, the first door panel 2 is a fixed door panel, with its upper end disposed in a first groove 11 and fixed in place. At least one first pulley 31 is disposed at the upper end of the second door panel 3, slidingly engaged in a second groove 12, allowing the first pulley 31 to move within the second groove 12 to move the second door panel 3 (left or right). At least one second pulley 41 is disposed at the upper end of the third door panel 4, slidingly engaged in a third groove 13, allowing the second pulley 41 to move within the third groove 13 to move the third door panel 4 (left or right). The second door panel 3 and the third door panel 4 can move (left or right) on the upper rail 1, enabling the improved linkage sliding door to open and close. In this embodiment, the upper rail 1 is provided with two first convex rails 14. The two first convex rails 14 are located near the bottom of both sides of the second groove 12. The two first convex rails 14 extend along the length direction of the upper rail 1. The outer edge of the first pulley 31 is provided with two first grooves 32. The two first grooves 32 are respectively matched with the two first convex rails 14. The first grooves 32 can be guided to move (left and right) by the first convex rails 14 and can produce a limiting effect to prevent the first pulley 31 from wobbling back and forth in the second groove 12. In this embodiment, the upper rail 1 is provided with two second convex rails 15. The two second convex rails 15 are located near the bottom of both sides of the third groove 13. The two second convex rails 15 extend along the length direction of the upper rail 1. The outer edge of the second pulley 41 is provided with two second grooves 42. The two second grooves 42 are respectively matched with the two second convex rails 15. The second grooves 42 can be guided to move (left and right) by the second convex rails 15 and can produce a limiting effect to prevent the second pulley 41 from wobbling back and forth in the third groove 13. In this embodiment, a fixing mechanism 70 can be provided at each end of the upper rail 1 (as shown in Figures 9 and 10). Each fixing mechanism 70 includes a fixing seat 701 and two latching pieces 702. The two latching pieces 702 are respectively pivotally connected to the fixing seat 701 by a pivot member 704, so that the fixing seat 701 and the latching pieces 702 can rotate relative to each other. The fixing seat 701 can be fixed to the wall or other installation positions by means of screw locking. Each latching piece 702 has a slot 703 on both sides. The two latching pieces 702 are respectively set in the second groove 12 and the third groove 13. The slots 703 of the two latching pieces 702 can respectively latch with the first convex rail 14 and the second convex rail 15, and the first convex rail 14 and the second convex rail 15 can be respectively sandwiched between the two latching pieces 702 and the fixing seat 701, so that the two ends of the upper rail 1 can be fixed to the installation position by means of the fixing mechanism 70. The mounting base 701 and the latching piece 702 can rotate relative to each other, and the two latching pieces 702 can move in the second groove 12 and the third groove 13, so that the upper rail 1 can be finely adjusted according to the slope of the wall, which facilitates installation. In this embodiment, a connector 33 is provided at the lower end of the first pulley 31 (as shown in Figures 3 and 5). The upper end of the second door panel 3 is fixed to the connector 33 with a fastener 34. The fastener 34 can be an eccentric screw or the like, so that the horizontal height of the second door panel 3 can be adjusted by rotating the fastener 34 (eccentric screw). Similarly, a connector 33 can be provided at the lower end of the second pulley 41, and the upper end of the third door panel 4 is fixed to the connector 33 with a fastener 34 (eccentric screw), so that the horizontal height of the third door panel 4 can be adjusted by rotating the fastener 34 (eccentric screw). Gear 5 is pivotally mounted on the upper end of the second door panel 3. First rack 6 and second rack 7 are respectively fixed to the upper ends of the first door panel 2 and the third door panel 4, with the first rack 6 extending to an appropriate length. In this embodiment, a first seat 21 and a second seat 43 are respectively provided at the upper ends of the first door panel 2 and the third door panel 4. The first seat 21 can be formed on the upper rail 1, and the first rack 6 and second rack 7 are respectively fixed to the first seat 21 and the second seat 43. The first rack 6 and second rack 7 are horizontally arranged, and gear 5 meshes with them. Gear 5 is located between the first rack 6 and the second rack 7, with its opposite sides meshing with the first rack 6 and the second rack 7, thereby forming a linkage mechanism. When the third door panel 4 is pulled, the second door panel 3 can be moved via gear 5, the first rack 6, and the second rack 7, achieving the function of linkage between the two doors. If the first door panel 2 adopts a movable design, the function of three doors moving together can also be achieved. However, the three-door moving mechanism usually fixes the first door panel 2 or the third door panel 4 by means of magnetic attraction, but does not restrict it. Positioning rollers 30 are disposed at the upper end of the third door panel 4. One or more positioning rollers 30 can be pivotally mounted at the upper end of the third door panel 4 via a rotating shaft 301. The rotating shaft 301 can be vertically positioned, allowing the positioning rollers 30 to be horizontally positioned, thus providing a stable rolling guidance effect. The positioning rollers 30 contact an inner wall 17 of the upper rail 1, allowing them to roll on the inner wall 17 of the upper rail 1 when the third door panel 4 moves, guiding the stable movement of the third door panel 4 and preventing swaying or shaking. Furthermore, the gears 5, the first rack 6, and the second rack 7 can engage tightly without skipping teeth. In another embodiment, the first door panel 2 can also be a movable door panel, so that the first door panel 2 can move (left or right) on the upper rail 1. Similarly, a positioning roller (not shown) can be provided at the upper end of the first door panel 2, so that the positioning roller contacts the other inner wall of the upper rail 1, so that when the first door panel 2 moves, the positioning roller 30 can roll on the other inner wall of the upper rail 1, thereby guiding the stable movement of the first door panel 2. In this embodiment, a connector 33 is also provided at the lower end of the second pulley 41, and the upper end of the third door panel 4 is fixed to the connector 33. A connecting rod 40 is provided between the connector 33 and the second pulley 41 (as shown in Figures 7 and 8). The positioning roller 30 can be pivotally mounted on the connecting rod 40 using the rotation axis 301, so that the positioning roller 30 can be pivotally mounted at the upper end of the third door panel 4, and the second pulley 41, the third door panel 4 and the positioning roller 30 can be more securely connected through the connecting rod 40. The improved linkage sliding door of the present invention may further include a first limiting member 8, a second limiting member 9, a first groove-shaped member 10, and a second groove-shaped member 20. In this embodiment, the first limiting member 8 can be fixed to the lower end of the first door panel 2 by means of screws or the like, and the first limiting member 8 extends towards the second door panel 3 to form a first protrusion 81 (as shown in Figure 4). In this embodiment, the cross-section of the first limiting member 8 may be L-shaped, and the first limiting member 8 has a first fixing part 82, which is fixed to one side of the first door panel 2 near the lower end. The first protrusion 81 is formed by extending horizontally and upward from the lower end of the first fixing part 82, so that the first protrusion 81 is vertical. The second limiting member 9 can be fixed to the lower end of the second door panel 3 by means of screws or other methods. The second limiting member 9 extends towards the third door panel 4 to form a second protrusion 91 (as shown in Figure 4). In this embodiment, the cross-section of the second limiting member 9 can be L-shaped. The second limiting member 9 has a second fixing part 92, which is fixed to one side of the second door panel 3 near the lower end. The second protrusion 91 is formed by extending horizontally and upward from the lower end of the second fixing part 92, so that the second protrusion 91 is vertical. The first grooved component 10 can be fixed to the lower end of the second door panel 3 by means of snap-fit ​​or screw locking. The first grooved component 10 has a first limiting groove 101. In this embodiment, the cross-section of the first grooved component 10 can be H-shaped. The first grooved component 10 has a third fixing part 102, which is fixed to the lower end of the second door panel 3. The first limiting groove 101 is located below the third fixing part 102. The first protrusion 81 of the first limiting component 8 is inserted into the first limiting groove 101 of the first grooved component 10. The cooperation of the first protrusion 81 and the first limiting groove 101 can guide and limit the movement of the second door panel 3 to avoid the first door panel 2 and the second door panel 3 from shaking back and forth. This ensures that the first door panel 2 and the second door panel 3 can be accurately positioned without shaking, and the movement is relatively smooth. Preferably, the first groove member 10 may be provided with a plurality of first ribs 103, which are located in the first limiting groove 101. The first ribs 103 extend toward the first protrusion 81 and are close to the first protrusion 81. The first ribs 103 can provide a limiting effect to prevent the first door panel 2 and the second door panel 3 from shaking forward and backward. They can also reduce the entry of dust and other particles into the first limiting groove 101 and have a noise reduction function. The second grooved component 20 can be fixed to the lower end of the third door panel 4 by means of snap-fit ​​or screw locking. The second grooved component 20 has a second limiting groove 201. In this embodiment, the cross-section of the second grooved component 20 can be H-shaped. The second grooved component 20 has a fourth fixing part 202, which is fixed to the lower end of the third door panel 4. The second limiting groove 201 is located below the fourth fixing part 202. The second protrusion 91 of the second limiting component 9 is inserted into the second limiting groove 201 of the second grooved component 20. The cooperation of the second protrusion 91 and the second limiting groove 201 can guide and limit the movement of the second door panel 3 and the third door panel 4 to avoid the second door panel 3 and the third door panel 4 from wobbling back and forth, so that the second door panel 3 and the third door panel 4 can be accurately positioned and move more smoothly. Preferably, the second groove member 20 may be provided with a plurality of second ribs 203, which are located in the second limiting groove 201. The second ribs 203 extend toward the second protrusion 91 and are close to the second protrusion 91. The second ribs 203 can provide a limiting effect to prevent the second door panel 3 and the third door panel 4 from shaking forward and backward. They can also reduce the entry of dust and other particles into the second limiting groove 201 and have a noise reduction function. In this embodiment, the first limiting member 8 can be fixed to the lower end of the first door panel 2 with at least one first eccentric screw 50. The height of the first limiting member 8 can be adjusted by rotating the first eccentric screw 50, so that the first limiting member 8 can be adjusted in height, and the first protrusion 81 and the first limiting groove 101 can form an optimal fit. The second limiting member 9 can be fixed to the lower end of the second door panel 3 with at least one second eccentric screw 60. The height of the second limiting member 9 can be adjusted by rotating the second eccentric screw 60, so that the second limiting member 9 can be adjusted in height, and the second protrusion 91 and the second limiting groove 201 can form an optimal fit. [Beneficial Effects of the Examples] The beneficial effects of this invention are as follows: The improved interlocking sliding door provided by this invention includes an upper rail, a first door panel, a second door panel, a third door panel, a gear, a first rack, a second rack, and at least one positioning roller. The upper ends of the first, second, and third door panels are disposed on the upper rail. The gear is pivotally mounted on the upper end of the second door panel. The first and second racks are respectively fixed to the upper ends of the first and third door panels. The gear meshes with the first and second racks to form an interlocking mechanism, enabling multi-door interlocking. The positioning roller is disposed on the upper end of the third door panel and contacts the inner wall of the upper rail. The positioning roller can roll on the inner wall of the upper rail, guiding the stable movement of the third door panel, preventing swaying or shaking. Furthermore, the gear, the first rack, and the second rack can engage tightly without skipping teeth, allowing the door panels to move stably and smoothly. The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention specification and drawings are included in the scope of the patent application of the present invention. 1: Upper rail 11: First groove 12: Second groove 13: Third groove 14: First convex rail 15: Second convex rail 17: Inner side wall 2: First door panel 21: First seat 3: Second door panel 31: First pulley 32: First groove 33: Connector 34: Locking fastener 4: Third door panel 41: Second pulley 42: Second groove 43: Second seat 5: Gear 6: First rack 7: Second rack 8: First limiting member 81: First protrusion 82: First fixing part 9: Second Limiting component 91: Second protrusion 92: Second fixing part 10: First groove 101: First limiting groove 102: Third fixing part 103: First rib 20: Second groove 201: Second limiting groove 202: Fourth fixing part 203: Second rib 30: Positioning roller 301: Rotating shaft 40: Connecting rod 50: First eccentric screw 60: Second eccentric screw 70: Fixing mechanism 701: Fixing seat 702: Buckle piece 703: Buckle groove 704: Pivot component Figure 1 is a perspective view of the improved linkage sliding door according to an embodiment of the present invention. Figure 2 is a side view of the improved linkage sliding door according to an embodiment of the present invention. Figure 3 is a detailed view of part III of Figure 2. Figure 4 is a detailed view of part IV of Figure 2. Figure 5 is a cross-sectional view of V-V in Figure 1. Figure 6 is a sectional view of VI-VI in Figure 1. Figure 7 is an exploded perspective view (I) of a partial structure of the improved linkage sliding door according to an embodiment of the present invention. Figure 8 is a perspective exploded view (II) of a partial structure of the improved linkage sliding door according to an embodiment of the present invention. Figure 9 is a three-dimensional exploded view of the partial structure of the upper rail in an embodiment of the present invention. Figure 10 is a detailed view of part X of Figure 1. 1: Upper rail 11: First trench 12: Second trench 13: Third trench 14: First Convex Rail 15: Second convex rail 17: Inner wall 2: First door panel 21: First Seat 3: Second door panel 31: First pulley 32: First groove 33: Connector 34: Locking hardware 4: Third door panel 41: Second pulley 42: Second groove 43: Second seat 5: Gears 6: First rack 7: Second rack 30: Positioning roller 301: Rotation axis

Claims

1. An improved linkage sliding door includes: An upper rail, wherein the upper rail has a first groove, a second groove and a third groove; A first door panel, the upper end of which is disposed in a first groove; a second door panel, the upper end of which is provided with at least one first pulley, the at least one first pulley being slidably engaged in the second groove; a third door panel, the upper end of which is provided with at least one second pulley, the at least one second pulley being slidably engaged in the third groove; a gear, the gear being pivotally disposed at the upper end of the second door panel; a first rack, the first rack being fixed at the upper end of the first door panel; a second rack, the second rack being fixed at the upper end of the third door panel, the gear meshing with the first rack and the second rack to form a linkage mechanism; and at least one positioning roller, the at least one positioning roller being disposed at the upper end of the third door panel, the at least one positioning roller contacting an inner sidewall of the upper rail, the positioning roller being able to roll on the inner sidewall of the upper rail; A connector is provided at the lower end of the second pulley, the upper end of the third door panel is fixed to the connector, a connecting rod is provided between the connector and the second pulley, and the positioning roller is pivotally mounted on the connecting rod with a rotation axis. The improved linkage sliding door as described in claim 1, wherein at least one positioning roller is pivotally mounted on the upper end of the third door panel with a rotation axis, the rotation axis being vertically arranged, and the positioning roller being horizontally arranged. The improved interlocking sliding door as described in claim 1 further includes a first limiting member, a second limiting member, a first groove member, and a second groove member. The first limiting member is fixed to the lower end of the first door panel and extends towards the second door panel to form a first protrusion. The second limiting member is fixed to the lower end of the second door panel and extends towards the third door panel to form a second protrusion. The first groove member is fixed to the lower end of the second door panel and has a first limiting groove. The first protrusion of the first limiting member is inserted into the first limiting groove of the first groove member to guide and limit the movement of the second door panel. The second groove member is fixed to the lower end of the third door panel and has a second limiting groove. The second protrusion of the second limiting member is inserted into the second limiting groove of the second groove member to guide and limit the movement of the second door panel and the third door panel. The improved linkage sliding door as described in claim 3, wherein the first groove member is provided with a plurality of first ribs located in the first limiting groove, the first ribs extending toward the first protrusion, and the first ribs being close to the first protrusion. The improved linkage sliding door as described in claim 3, wherein the second groove member is provided with a plurality of second ribs located in the second limiting groove, the second ribs extending toward the second protrusion, and the second ribs being close to the second protrusion. As described in claim 3, in the improved linkage sliding door, the first limiting member can be fixed to the lower end of the first door panel with at least one first eccentric screw, and the height of the first limiting member can be adjusted by rotating the at least one first eccentric screw. As described in claim 3, in the improved linkage sliding door, the second limiting member can be fixed to the lower end of the second door panel with at least one second eccentric screw, and the height of the second limiting member can be adjusted by rotating the at least one second eccentric screw. As described in claim 1, the improved linkage sliding door is provided with two first convex rails on the upper rail, the two first convex rails being located near the bottom of both sides of the second groove and extending along the length of the upper rail. The outer edge of the at least one first pulley is provided with two first grooves, the two first grooves respectively engaging with the two first convex rails. The upper rail is provided with two second convex rails, the two second convex rails being located near the bottom of both sides of the third groove and extending along the length of the upper rail. The outer edge of the at least one second pulley is provided with two second grooves, the two second grooves respectively engaging with the two second convex rails. As described in claim 8, in the improved linkage sliding door, a fixing mechanism is provided at each end of the upper rail. Each fixing mechanism includes a fixing base and two latching pieces. The two latching pieces are pivotally connected to the fixing base by a pivot member, so that the two latching pieces and the fixing base can rotate relative to each other. A slot is provided on each side of the two latching pieces. The two latching pieces are respectively disposed in the second groove and the third groove. The slots of the two latching pieces are respectively engaged with the two first convex rails and the two second convex rails, and the two first convex rails and the two second convex rails are respectively sandwiched between the two latching pieces and the fixing base.

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