Track assembly for shower door and shower enclosure comprising same

Abstract

The present disclosure provides a track assembly for a shower door, comprising at least one roller assembly, at least one closer, and a track. The roller assembly includes a roller and an anti-derailment member; the roller is accommodated in and passes through the anti-derailment member to be seated above the track for reciprocation in a first direction. The anti-derailment member has a limiting block protruding toward the track in a second direction perpendicular to the first. The track has a first accommodating cavity with an upward opening and limiting edges on both sides partially covering it. The closer is entirely hidden in the cavity; the limiting block extends into the cavity and engages the limiting edges to prevent detachment, and also engages the closer for buffering. The roller contacts only the limiting edges. This design achieves an aesthetic, simple appearance while ensuring stable, reliable operation of the roller assembly.

Description

Track assemblies for shower doors and shower enclosures including them Technical Field

[0001] This disclosure relates to the field of bathroom equipment technology, and more specifically, to a track assembly for a shower door and a shower enclosure including the track assembly. Background Technology

[0002] Nowadays, people usually install shower doors in their bathrooms during renovations. Generally, bathrooms are shown as rectangles on floor plans, and a shower door is typically used in the middle of the rectangle to separate the bathroom into a dry area and a wet area.

[0003] A shower door can be a combination of a fixed door and a sliding door, or a combination of multiple fixed doors and multiple sliding doors. To increase practicality, most shower doors are installed with two sliding doors that slide against each other. This allows users to enter the shower without spatial restrictions, from either the left or right side of the shower door.

[0004] Most existing double-hinged sliding doors have two tracks, each corresponding to a door panel. The door panels slide within their respective tracks without interfering with each other. However, this requires relatively large tracks to accommodate both tracks. Such a design results in significant material consumption, contradicting current environmental protection principles.

[0005] In addition, to prevent the sliding door from colliding violently with the wall when closing, a door closer is usually installed on the track. Current technology involves installing the door closer below the track, and also installing an anti-jump device below the track to prevent the rollers connected to the door panel from disengaging from the track. The anti-jump device can also work with the door closer to provide a soft closing effect. However, placing the door closer and anti-jump device below the track obviously affects the aesthetics of the shower door.

[0006] Therefore, there is an urgent need for a track assembly with anti-derailment rollers and concealed closure, which can save materials and achieve a beautiful and simple appearance in the practical application of shower doors.

[0007] Utility Model Content

[0008] To address the aforementioned problems, a key aspect of this disclosure provides a track assembly for a shower door, comprising at least one roller assembly, at least one closer, and a track disposed along a first direction. The roller assembly includes a roller and an anti-derailment element. The roller is housed within and passes through the anti-derailment element, sitting above the track to reciprocate along the track in the first direction. The anti-derailment element has a limiting block protruding toward the track in a second direction perpendicular to the first direction. The track has a first receiving cavity and a limiting edge extending longitudinally along the first direction. The first receiving cavity has an upward opening, and the limiting edge is arranged on both sides of the opening in a third upward direction and partially covers the opening, the third direction being perpendicular to both the first and second directions. The closer is entirely concealed within the first receiving cavity. The limiting block extends into the first receiving cavity and engages with the limiting edge to prevent the roller assembly from disengaging from the track. The limiting block is adapted to engage with the closer to provide a cushioning force. The roller only rolls in contact with the limiting edge of the track. By incorporating anti-derailment components, the roller assembly is allowed to run stably and reliably along the track, preventing it from jumping up and derailing.

[0009] Optionally, the anti-derailment component further includes a stepped portion extending downward from the lower surface of the anti-derailment component body along a second direction, and a limiting block extending downward from the lower surface of the stepped portion along the second direction. The limiting block includes a main body and a limiting boss, the limiting boss being formed on both sides of the main body in a third direction and having guide ramps that gradually narrow downward, wherein the minimum dimension between the guide ramps in the third direction is smaller than the size of the opening and the maximum dimension is larger than the size of the opening, and wherein at least the limiting block is made of an elastic material. The stepped portion is received in the opening between the limiting sides, and the limiting block is received in a first receiving cavity. That is, the dimensions of the stepped portion and the limiting block are configured such that by compressing the limiting boss, the limiting block and the stepped portion can be received in the opening defined between the limiting sides, and the limiting block can be held in the first receiving cavity, and the limiting boss, after restoring its elastic deformation, can engage with the limiting side to prevent the limiting block from disengaging from the first receiving cavity.

[0010] Optionally, the anti-derailment component has a second receiving cavity for accommodating the roller. The circumferential surface of the second receiving cavity has two spaced-apart openings at its bottom, through which the roller rolls into contact with the limiting edges on both sides of the track. Alternatively, the axial dimension of the second receiving cavity is smaller than the axial dimension of the roller, such that the outer edge of the roller near the opening side of the second receiving cavity extends out of the anti-derailment component and contacts the track. The circumferential surface of the second receiving cavity has an opening at its bottom and on the opposite side, allowing the outer edge of the roller to contact the track through the opening on the other side. This allows the roller to roll into contact with the track via the anti-derailment component. Optionally, the diameter of the outer circumferential surface of the roller decreases from the center to both ends, and the upper surface of the limiting edge is formed into a corresponding concave shape to better support the roller.

[0011] Optionally, the closure includes an engaging member and a damper connected to the engaging member. The engaging member is positioned closer to the longitudinal end of the track than the damper, and the engaging member is adapted to engage with a limiting block to transmit the buffering force from the damper and the automatic closing force from the spring to the roller assembly. Compared to a structure where the damper is positioned outside the engaging member, the engaging member of this application is positioned outside the damper, thereby allowing the limiting block and rollers to be positioned closer to the ends of the door rather than the center, which is beneficial to the stability of the sliding door and improves the applicability of the track assembly.

[0012] Optionally, the track includes load-bearing plates spaced apart and parallel to each other in a second direction, and a bottom connecting plate connecting the load-bearing plates. Near the bottom connecting plate, the load-bearing plates form a limiting partition extending inwardly in a third direction. The limiting partition, load-bearing plates, and limiting edge together define a first receiving cavity. Below the first receiving cavity, the limiting partition, load-bearing plates, and bottom connecting plate together define a mounting groove. A nut is provided in the mounting groove for fixing the closure device within the first receiving cavity. This provides a simple and aesthetically pleasing track assembly structure.

[0013] Optionally, the roller assembly also includes an anti-rotation component and a clamping component. The clamping component, roller, anti-derailment component, and anti-rotation component are coaxially connected sequentially along a third direction and installed on the side of the movable door facing the track. The anti-rotation component and the anti-derailment component are non-rotatably connected to prevent relative rotation between them. The clamping component is provided with a fixing screw, and the anti-rotation component is provided with a hollow shaft with an internal threaded hole. The hollow shaft passes through the center holes of the anti-derailment component and the roller in sequence and is threadedly connected to the fixing screw. The roller is mounted on the hollow shaft by ball bearings. Thus, the roller assembly is assembled, and in the installed state, only the roller can rotate around the hollow shaft, while other components remain fixed.

[0014] Optionally, the anti-rotation component includes a first disc-shaped seat portion perpendicular to the hollow shaft, and the first seat portion is provided with an anti-rotation notch; the clamping component includes a second disc-shaped seat portion perpendicular to the fixing screw, and the anti-derailment component has a first countersunk hole formed on the surface facing the anti-rotation component, and the inner circumferential wall of the first countersunk hole has protruding teeth for engaging with the anti-rotation notch on the first seat portion of the anti-rotation component, thereby preventing relative rotation between the anti-rotation component and the anti-derailment component.

[0015] Optionally, the roller assembly also includes an eccentric fastener having a disc-shaped third seat and an eccentric shaft. A threaded hole is provided at the center of the third seat, penetrating both the third seat and the eccentric shaft, and the central axis of the eccentric shaft is offset from the central axis of the threaded hole. The eccentric shaft can be inserted into the mounting hole of the sliding door from the side opposite to the track, and a helical locking member can be screwed into the internal threaded hole of the anti-rotation member through the threaded hole of the eccentric shaft to lock the roller assembly. The installation height of the sliding door can be adjusted by rotating the eccentric fastener.

[0016] According to another aspect of this disclosure, a shower enclosure comprising at least one movable door and any of the aforementioned track components is also provided.

[0017] Optionally, the shower enclosure includes two sliding doors that share a single track and are positioned on opposite sides of the track in a third-direction orientation. The rollers of the two doors are staggered on the track, such that the inner roller of one door is positioned between the two rollers of the other door and rolls between them. By allowing the two doors to share a single track, the number of tracks is reduced, saving costs.

[0018] The above-mentioned features include a concealed anti-derailment component in the roller assembly to prevent the sliding door from detaching from the track, and a concealed closure between the roller assembly and the track to prevent the sliding door from sliding too fast and colliding with the door frame or wall. This effectively reduces the overall size of the track assembly, simplifies the overall mechanism, saves costs, and enhances the aesthetics of the shower door, thereby improving product usability and user satisfaction. Attached Figure Description

[0019] The accompanying drawings are included to provide a further understanding of this disclosure and are incorporated in and form a part of this specification. The drawings illustrate alternative embodiments of this disclosure and, together with the following description, serve to illustrate the principles of this disclosure.

[0020] Figure 1 shows a schematic diagram of the installation of a track assembly for a shower door in a sliding door according to an embodiment of this application;

[0021] Figure 2 shows a cross-sectional view of the track assembly of Figure 1 in the installed state;

[0022] Figure 3 is an exploded schematic diagram showing the structure of the track assembly in Figure 1;

[0023] Figure 4 shows a cross-sectional schematic diagram of the track assembly of Figure 1 in the installed state;

[0024] Figures 5a and 5b show schematic diagrams of the track of the track assembly in Figure 1;

[0025] Figure 6 shows a schematic diagram of the rollers of the track assembly in Figure 1;

[0026] Figure 7 shows a schematic diagram of the anti-derailment component of the track assembly in Figure 1;

[0027] Figure 8 shows a schematic diagram of the anti-rotation component of the track assembly in Figure 1;

[0028] Figure 9 shows a schematic diagram of the clamping element of the track assembly in Figure 1;

[0029] Figure 10 shows a schematic diagram of the eccentric fastener of the track assembly in Figure 1;

[0030] Figure 11 shows a schematic diagram of the closure of the track assembly in Figure 1.

[0031] The reference numerals in the figures represent: 10: Roller assembly; 101: Roller; 1011: First center hole; 1012: Roller end face; 102: Anti-derailment component; 1021: Limiting block; 1022: Main body; 1023: Limiting boss; 1024: Guide slope; 1025: First through hole; 1026: Stepped part; 1027: Second receiving cavity; 1028: Opening; 1029: Baffle; 10210: Second center hole; 10211: First countersunk hole; 10212: Raised tooth; 103: Anti-rotation component; 1031: Seat; 1032: Anti-rotation notch; 1033: First step; 1034: Hollow shaft; 1035: Bottom surface; 104: Clamping component; 1041: Seat; 1042: Fixing screw; 1043: Pressing surface; 105: Eccentric fastener; 1051: Seat; 1052: Third through hole; 1053: Second countersunk hole; 1054: Eccentric shaft; 20: Closure device; 201: Engaging part; 202: Damper; 203: Fourth through hole; 204: Nut; 205: Sliding groove; 206: Recessed step; 207: Plate-shaped body; 208: First locking tooth; 209: Second locking tooth; 2010: Spring; 2011: Guide cavity; 30: Track; 301, 302: Load-bearing plate; 303: Bottom connecting plate; 304: First receiving cavity; 305: Limiting edge; 306, 307: Track end face; 308: Limiting partition; 309: Mounting groove. Detailed Implementation

[0032] The technical solutions of the embodiments of this disclosure will now be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of this disclosure and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0033] Unless otherwise expressly defined, the terms "first," "second," or "third" used in the claims, description, and accompanying drawings of this disclosure are for distinguishing different objects and not for describing a specific order.

[0034] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this disclosure, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," and "right" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this disclosure and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this disclosure.

[0035] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this disclosure shall be interpreted broadly to refer to any connection in which there is no displacement relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or elements.

[0036] In the claims, description and accompanying drawings of this disclosure, the terms "comprising", "having" and variations thereof are used to mean "including but not limited to".

[0037] This document describes embodiments with reference to cross-sectional views as idealized implementations. Therefore, variations in shape relative to the illustrations are anticipated as a result of, for example, manufacturing techniques and / or tolerances. Consequently, the embodiments described herein should not be construed as limited to the specific shapes of the regions shown herein, but should include deviations in shape due to, for example, manufacturing processes. For example, regions shown or described as flat may typically have rough and / or non-linear characteristics. Furthermore, acute angles shown may be rounded. The same reference numerals denote the same parts throughout the document. In the drawings, for clarity, the thickness, proportions, and dimensions of the parts are enlarged.

[0038] For ease of description and understanding, referring to the installation position shown in Figure 1, the direction of the moving door (opening or closing direction, i.e., the horizontal direction in Figure 1) is defined as the first direction in this disclosure, the vertical direction (i.e., up and down direction) in the installation state is defined as the second direction, the first direction is perpendicular to the second direction, and the direction perpendicular to the first direction and the second direction is defined as the third direction.

[0039] This disclosure provides a track assembly for a shower door, comprising a roller assembly, a closer, and a track. The roller assembly includes an anti-derailment element to prevent the door from detaching from the track. A concealed closer is provided between the roller assembly and the track, ensuring both the aesthetics of the shower door and preventing the door from sliding too quickly and causing an impact, thereby improving user satisfaction.

[0040] The following embodiments of this disclosure exemplarily illustrate a track assembly for a shower door, as shown in Figures 1 to 11. As schematically shown in Figure 1, the track assembly can be mounted along a first direction at a position corresponding to the top of the movable door. As shown in Figure 2, the track assembly includes a roller assembly 10, a closure 20, and a track 30. At least two roller assemblies can be mounted on a movable door, and at least one movable door can be mounted on a shower door.

[0041] As shown in Figures 2 and 5a, the closure 20 can be completely accommodated in the first receiving cavity 304 of the track 30, so that the entire closure 20 is hidden within the first receiving cavity 304, and the closure 20 is installed at a position close to either end of the track end face 306 or track end face 307 of the track 30. Depending on the need, the closure 20 can be installed at one end of the track 30 or simultaneously at both ends of the track 30.

[0042] As shown in Figure 3, the roller assembly 10 includes a roller 101, an anti-derailment component 102, an anti-rotation component 103, a clamping component 104, and an eccentric fastener 105. As shown in Figure 4, in the installed state, the clamping component 104, roller 101, anti-derailment component 102, and anti-rotation component 103 are sequentially coaxially connected along a third direction and installed on the side of the movable door facing the track. The eccentric fastener 105 is located on the other side of the movable door opposite to the track. The roller 101 is accommodated in the anti-derailment component 102 and sits above the track 30 through the anti-derailment component 102, thereby reciprocating along the first direction on the track 30, allowing the movable door to slide reciprocally along the first direction on the track 30 via the roller 101. The anti-derailment component 102 is formed with a limiting block 1021 protruding toward the track 30 in a second direction for engaging with the track 30 to prevent the roller assembly 10 from disengaging from the track 30, and the limiting block 1021 is adapted to engage with the closure 20 so that the closure 20 provides a buffering force.

[0043] A track 30 is provided below the roller assembly 10. The length of the track 30 is greater than the size of the movable door in the first direction, and the length of the track 30 can be adjusted according to the actual application. The track end face 306 and track end face 307 of the track 30 can be fixedly installed between the two walls and / or the fixed frame of the shower room by means of adhesive, threaded connection, etc.

[0044] As shown in Figures 5a and 5b, the track 30 has load-bearing plates 301 and 302 spaced apart and parallel to each other in a second direction. The bottoms of the load-bearing plates 301 and 302 are connected by a bottom connecting plate 303, thereby forming a first receiving cavity 304 with a top opening, which is used to receive the closure device 20, and the limiting block 1021 of the anti-derailment member 102 also extends into the first receiving cavity 304. The tops of the load-bearing plates 301 and 302 also form limiting edges 305. The limiting edges 305 partially cover the openings of the first receiving cavity 304 from both sides, providing a track for the roller 101 to roll and engaging with the limiting block 1021 to prevent the roller assembly 10 from disengaging from the track 30.

[0045] As shown in Figure 6, preferably, the roller 101 is generally cylindrical in shape, slightly thicker in the middle and slightly thinner at both ends. The diameter of its outer circumferential surface decreases from the center to both ends, and a first central hole 1011 is formed through it along the central axis. The roller end face 1012 protrudes from the first central hole 1011 along the circumference. Correspondingly, as shown in Figure 4, the upper surface of the limiting edge 305 is concave in shape and recessed into the first receiving cavity 304, thereby more stably supporting the roller 101 and making rolling contact with the roller 101. It can be understood that the roller 101 can be formed as a cylinder, and the limiting edge 305 can be formed as a flat surface.

[0046] As shown in Figure 7, a second receiving cavity 1027 is formed inside the main body of the anti-derailment component 102 for accommodating the roller 101. The second receiving cavity 1027 is surrounded by a circumferential surface and a baffle 1029, and thus, the second receiving cavity 1027 has an opening facing the track 30 in the installed state to facilitate the installation of the roller 101. In addition, a second central hole 10210 is provided at the center of the baffle 1029 for assembling the roller assembly 10. The second receiving cavity 1027 has two openings spaced apart at the bottom on its circumferential surface. The roller 101 rolls in contact with the limiting edges 305 on both sides of the track 30 through the two openings. Alternatively, the axial dimension of the second receiving cavity 1027 is smaller than the axial dimension of the roller 101, such that the outer edge of the roller 101 near the opening side of the second receiving cavity 1027 extends out of the anti-derailment member 102 and contacts the track 30. The circumferential surface of the second receiving cavity 1027 has an opening 1028 at the bottom and on the opposite side from the opening side, such that the outer edge of the roller 101 contacts the track 30 through the opening 1028 on the other side. The bottom of the second receiving cavity 1027 also has a protruding stepped portion 1026, which is adjacent to the opening 1028 and parallel to the track 30 in a first direction.

[0047] The anti-derailment component 102 also includes a stepped portion 1026, which extends downwards along a second direction for a first length from the lower surface of the body of the anti-derailment component 102. The limiting block 1021 consists of a main body portion 1022 and a limiting boss 1023. The main body portion 1022 extends downwards along a second direction for a second length from the lower surface of the stepped portion 1026, and has a first through hole 1025 at its center. The limiting boss 1023 protrudes from both sides of the main body portion 1022 in a third direction, and has a guide ramp 1024 that gradually narrows downwards. Optionally, the limiting block 1021 is integrally made of an elastic material, and optionally, the entire anti-derailment component 102 is made of an elastic material.

[0048] During installation, the guide slope 1024 of the limiting block 1021 contacts the edge of the limiting edge 305 facing the first receiving cavity 304. The limiting bosses 1023 on both sides of the main body 1022 are compressed toward the first through hole 1025 under the action of external force, and extend into the first receiving cavity 304 of the track 30 under the guidance of the guide slope 1024. The dimensions of the stepped portion 1026 and the limiting bosses 1023 are configured such that the limiting bosses 1023 and the stepped portion 1026 can pass through the opening defined between the limiting edge 305 by compressing the limiting bosses 1023. The stepped portion 1026 is accommodated in the opening, and after the limiting block 1021 is fully inserted into the first receiving cavity 304, it springs back and returns to its original size.

[0049] Thus, in the installed state, the limiting block 1021 extends into the first receiving cavity 304 of the track 30. When the roller assembly 10 moves upward, the limiting boss 1023 abuts against the bottom surface of the limiting edge 305 of the track 30, so that the roller assembly 10 is hooked on the limiting edge 305 of the track 30 by means of the limiting block 1021 on the anti-derailment component 102, preventing the roller assembly 10 from leaving the track 30.

[0050] As clearly shown in Figure 4, the anti-derailment component 102 is sized such that, during normal operation, there is a gap between the limiting boss 1023 and the lower surface of the limiting edge 305, which is small enough that there is essentially no frictional resistance between the limiting boss 1023 and the lower surface of the limiting edge 305; once the roller assembly 10 jumps upward, the limiting boss 1023 abuts against the lower surface of the limiting edge 305, thereby preventing the roller assembly from derailing from the track.

[0051] The baffle 1029 of the anti-derailment component 102 has a stepped first countersunk hole 10211 on the side opposite to the second receiving cavity 1027, and the inner circumferential wall of the first countersunk hole 10211 has protruding teeth 10212 for cooperating with the anti-rotation component 103.

[0052] As shown in Figure 8, the anti-rotation member 103 may include, for example, a disc-shaped seat 1031 (corresponding to the first seat). The seat 1031 has a bottom surface 1035 and an anti-rotation notch 1032 formed at its outer edge for engaging with the protruding teeth 10212 of the anti-derailment member 102. The anti-rotation member 103 has a circular first step 1033 on the side of the seat 1031 facing away from the bottom surface 1035. A protruding hollow shaft 1034 is formed axially at the center of the first step 1033. A second through hole 1036 is formed axially at the center of the hollow shaft 1034. The second through hole 1036 has an internal thread and penetrates the anti-rotation member 103.

[0053] During installation, the hollow shaft 1034 passes through the second center hole 10210 of the anti-derailment component 102, extends into the first center hole 1011 of the roller 101, and contacts the roller 101. The first countersunk hole 10211 of the anti-derailment component 102 can accommodate the seat 1031 and the first step 1033 of the anti-rotation component 103. The protruding teeth 10212 engage with the anti-rotation notch 1032 of the anti-rotation component 103, thereby preventing relative rotation between the anti-rotation component 103 and the anti-derailment component 102.

[0054] The anti-rotation component of this application is not limited to the above-described form, but can be replaced by other shapes and structures that can be conceived by those skilled in the art to achieve the same effect of preventing relative rotation between the anti-rotation component 103 and the anti-derailment component 102. For example, the shapes of the seat portion 1031 and the first countersunk hole 10211 can be paired non-circular shapes.

[0055] As shown in Figure 9, the clamping member 104 is provided with a disc-shaped seat portion 1041 (corresponding to the second seat portion). The seat portion 1041 has a clamping surface 1043, on which a fixing screw 1042 protruding axially is formed.

[0056] During installation, the fixing screw 1042 extends into the second through hole 1036 of the anti-rotation member 103 through the first center hole 1011 of the roller 101, so that the clamping member 104 is threadedly connected to the anti-rotation member 103; the clamping surface 1043 abuts against the roller end face 1012 of the roller 101 facing the opening side of the first receiving cavity 304.

[0057] As shown in Figure 10, the eccentric fastener 105 can similarly include a disc-shaped seat 1051 (corresponding to the third seat), an eccentric shaft 1054, and a central threaded hole, i.e., a third through hole 1052, penetrating the seat 1051 and the eccentric shaft 1054, wherein the central axis of the eccentric shaft 1054 is offset from the central axis of the seat 1051 and the third through hole 1052. A second countersunk hole 1053 is also formed at the center of the bottom surface of the seat 1051 (i.e., the side facing away from the shower door). As shown in Figure 4, a countersunk screw or bolt, serving as a locking element, can be screwed into the threaded holes 1052 and 1036 via the second countersunk hole 1053 for fixing and eccentrically adjusting the installation height of the shower door.

[0058] During installation, the eccentric shaft 1054 is inserted into the mounting hole of the sliding door from the side facing away from the track 30. At this time, the top surface of the eccentric fastener 105—that is, the side with the eccentric shaft 1054—contacts one side of the sliding door. The anti-rotation member 103 is placed aligned with the mounting hole on the side of the sliding door facing the track 30. A locking member, such as a countersunk bolt, is screwed through the through hole 1052 of the eccentric shaft 1054 into the second through hole 1036 of the anti-rotation member 103 to lock the roller assembly 10, while allowing adjustment of the sliding door's installation height by rotating the eccentric fastener 105. As shown in Figure 4, the rollers are mounted on a hollow shaft, for example, via ball bearings and can rotate around the hollow shaft.

[0059] As shown in Figure 11, the closure 20 has fourth through holes 203 at both ends, through which the closure 20 can be fixedly installed on the bottom connecting plate 303 at the bottom of the track 30 using, for example, a threaded connection. In a preferred embodiment, as shown in Figure 5b, the load-bearing plates 301 and 302 of the track 30 have limiting partitions 308 extending inwardly in a third direction near the bottom connecting plate 303. The limiting partitions 308, load-bearing plates 301 and 302, and the limiting edge 305 together define a first receiving cavity 304. The limiting partitions 308, load-bearing plates 301 and 302, and the bottom connecting plate 303 together define a mounting groove 309 below the first receiving cavity 304. A nut 204 is provided in the mounting groove 309 for installing and fixing the closure 20 within the first receiving cavity 304. By passing a screw through the fourth through hole 203 of the closure 20 and combining it with the nut 204, the closure 20 is fixed to the bottom connecting plate 303 of the track 30. The position of the closure 20 relative to the track 30 can be easily adjusted by loosening and tightening the screw.

[0060] The closure 20 includes an engaging member 201 and a damper 202 connected to the engaging member 201. The engaging member 201 is located closer to the longitudinal end of the track 30 than the damper 202, and the engaging member 201 is adapted to engage with the limiting block 1021 to transmit the force from the damper 202 to the roller assembly 10.

[0061] The closure 20 includes an engaging member 201, a damper 202, a sliding groove 205, a guide cavity 2011, and a connecting arm (not shown). The engaging member 201 has a sheet-like body 207 received in the sliding groove 205, allowing the engaging member 201 to reciprocate along the sliding groove 205 in a first direction. The damper 202 is received in the guide cavity 2011 and includes a damping cylinder and a damping rod (not shown). When the door is closed, the damping rod retracts into the damping cylinder; when the door is opened, the damping rod extends outward from the damping cylinder. The engaging member 201 is positioned opposite to the damping rod of the damper 202, and the engaging member 201 is connected to the damping rod of the damper 202 via the connecting arm. One end of the connecting arm is hinged to a hinge portion (not shown) of the engaging member 201, and the other end is hinged to the end of the damping rod away from the damping cylinder. The guide cavity 2011 restricts the reciprocating movement of the connecting arm in the first direction. When the closure 20 is installed onto the track 30, the end of the closure 20 near the engaging member 201 is closer to the track end face of the track 30 than the end near the damper 202.

[0062] A downward-sloping step 206 is provided vertically downward along the second direction at one end of the sliding groove 205 near the damper 202. The two ends of the engaging member 201 have upward-protruding first and second teeth 208 and 209, respectively. When the engaging member 201 slides to the downward-sloping step 206, it flips over, and the second tooth 209 near the damper 202 sinks downward, releasing the engaging action of the engaging member 201. When the engaging member 201 slides away from the downward-sloping step 206, the second tooth 209 near the damper 202 flips upward, thus forming a locking mechanism between the first and second teeth 208 and 209.

[0063] The closure 20 also includes a spring 2010, which is disposed below the engaging member 201 and the damper 202 and positioned outside the movement path of the engaging member 201 and the damper 202. The movable end of the spring 2010 is connected to the latch of the connecting arm to engage with the engaging member 201, thereby enabling the movable end of the spring 2010 to reciprocate with the engaging member 201, thus achieving different tension states of the spring 2010.

[0064] When the sliding door closes to one side with the help of external force, the sliding door drives the roller 101 to approach the end face of the track. After the sliding door slides to a certain position, the limiting block 1021 of the anti-derailment component 102 pushes the first locking tooth 208 of the engaging component 201, causing the second locking tooth 209 to lift upward and disengage from the recessed step 206. The engaging component 201 engages with the limiting block 1021, thereby causing the sliding door to move synchronously with the engaging component 201. The movement of the engaging component 201 is transmitted to the damping rod of the damper 202 via the connecting arm, causing the damping rod of the damper 202 to push towards the damping cylinder. Thus, the damper 202 can absorb some kinetic energy, thereby slowing down the sliding of the door. At the same time, the movement of the engaging component 201 is transmitted to the movable end of the spring 2010, causing the spring 2010, which is in a stretched state, to retract. At this time, the sliding door can close automatically by the rebound force of the spring 2010 without the action of external force. When the movable door moves in the reverse direction (opens), the limit block 1021 pulls the locking piece 201 back under the drive of the movable door, and drives the damping rod and spring to extend outward through the connecting arm until the locking piece 201 slides to the sinking step 206 and flips over. The second locking tooth 209 sinks downward. At this time, the locking action of the latch is released, the locking piece 201 stops moving at the sinking step 206, the damping rod and spring are in the maximum tension state, and the movable door can drive the roller 101 to continue moving.

[0065] This disclosure also provides a shower enclosure including the aforementioned track assembly, which allows two sliding doors to be arranged on opposite sides of a track in a third direction. There is only one track, and the rollers of the two sliding doors can share the same track. The rollers of the two sliding doors are staggered on the track, such that one roller of one sliding door is positioned between two rollers of the other sliding door and can roll between the two rollers. This allows for left and right sliding of the sliding doors while reducing the number of tracks, thereby saving track materials and reducing costs.

[0066] The above description is merely a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present disclosure should be included within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be determined by the scope of the claims.

Claims

1. A track assembly for a shower door, characterized in that, The track assembly includes at least one roller assembly (10), at least one closure (20), and a track (30) arranged along a first direction, wherein, The roller assembly (10) includes a roller (101) and an anti-derailment member (102). The roller (101) is housed in the anti-derailment member (102) and sits above the track (30) through the anti-derailment member (102), thereby reciprocating on the track in a first direction. The anti-derailment member (102) is formed with a limiting block (1021) protruding toward the track (30) in a second direction perpendicular to the first direction. The track (30) is formed with a first receiving cavity (304) and a limiting edge (305) extending along the longitudinal length of the track (30) in the first direction. The first receiving cavity (304) has an upward opening. The limiting edge (305) is arranged on both sides of the opening in a third direction and partially covers the opening. The third direction is perpendicular to the first direction and the second direction. The closure (20) is entirely concealed within the first receiving cavity (304), the limiting block (1021) extends into the first receiving cavity (304) and can engage with the limiting edge (305), and the limiting block (1021) is adapted to engage with the closure to provide a cushioning force; and The roller (101) only makes rolling contact with the limiting edge (305) of the track (30).

2. The track assembly according to claim 1, wherein, The anti-derailment component (102) further includes a stepped portion (1026), which extends downward from the lower surface of the body of the anti-derailment component (102) along the second direction, and the limiting block (1021) extends downward from the lower surface of the stepped portion (1026) along the second direction. The limiting block (1021) includes a main body (1022) and a limiting boss (1023). The limiting boss (1023) is formed on both sides of the main body (1022) in the third direction and has guide ramps (1024) that gradually narrow downwards. The minimum dimension of the guide ramps (1024) in the third direction is smaller than the size of the opening, and the maximum dimension is larger than the size of the opening. Furthermore, at least the limiting block (1021) is made of an elastic material. The stepped portion (1026) is accommodated in the opening between the limiting edges (305), and the limiting block (1021) is accommodated in the first receiving cavity (304).

3. The track assembly according to claim 1 or 2, characterized in that, The anti-derailment component (102) has a second receiving cavity (1027) for accommodating the roller (101). The second receiving cavity (1027) has two openings spaced apart at the bottom on its circumferential surface, through which the roller (101) contacts the limiting edges (305) on both sides of the track (30); or The axial dimension of the second receiving cavity (1027) is smaller than the axial dimension of the roller (101). The outer edge of the roller (101) near the opening side of the second receiving cavity (1027) extends out of the anti-derailment member (102) and contacts the track (30). The circumferential surface of the second receiving cavity (1027) has an opening (1028) at the bottom and on the opposite side to the opening side. The outer edge of the roller (101) contacts the track (30) on the other side through the opening (1028). Optionally, the diameter of the outer circumferential surface of the roller (101) decreases from the center to both ends, and the upper surface of the limiting edge (305) is formed into a corresponding concave shape.

4. The track assembly according to claim 3, characterized in that, The closure (20) includes an engaging member (201) and a damper (202) connected to the engaging member (201), the engaging member (201) being disposed closer to the longitudinal end of the track than the damper (202), and the engaging member (201) being adapted to engage with the limiting block (1021).

5. The track assembly according to claim 4, characterized in that, The track (30) includes load-bearing plates (301, 302) spaced apart and parallel to each other in the second direction and a bottom connecting plate (303) connecting the load-bearing plates (301, 302). The load-bearing plates (301, 302) have a limiting partition (308) extending inwardly in the third direction near the bottom connecting plate (303). The limiting partition (308), the load-bearing plates (301, 302) and the limiting edge (305) together define the first receiving cavity (304). The limiting partition (308), the load-bearing plates (301, 302) and the bottom connecting plate (303) together define a mounting groove (309) below the first receiving cavity (304). A nut (204) is provided in the mounting groove (309) for fixing the closure (20) in the first receiving cavity (304).

6. The track assembly according to claim 5, wherein, The roller assembly (10) further includes an anti-rotation component (103) and a clamping component (104). The clamping component (104), the roller (101), the anti-derailment component (102), and the anti-rotation component (103) are sequentially coaxially connected along the third direction and installed on the side of the movable door facing the track (30). The anti-rotation component (103) and the anti-derailment component (102) are non-rotatably connected. The clamping member (104) is provided with a fixing screw (1042), and the anti-rotation member (103) is provided with a hollow shaft (1034) with an internal threaded hole (1036). The hollow shaft (1034) passes through the center holes of the anti-derailment member (102) and the roller (101) in sequence and is threadedly connected to the fixing screw (1042). The roller (101) is mounted on the hollow shaft (1034) by ball bearings.

7. The track assembly according to claim 6, wherein, The anti-rotation component (103) includes a disc-shaped first seat (1031) disposed perpendicular to the hollow shaft (1034), and the first seat (1031) is provided with an anti-rotation notch (1032); The clamping member (104) includes a disc-shaped second seat (1041) disposed perpendicular to the fixing screw (1042). The anti-derailment component (102) has a first countersunk hole (10211) formed on the surface facing the anti-rotation component (103). A tooth (10212) is formed on the inner circumferential wall of the first countersunk hole (10211), and the tooth (10212) engages with the anti-rotation notch (1032) on the first seat portion (1031) of the anti-rotation component (103).

8. The track assembly according to claim 7, wherein, The roller assembly (10) further includes an eccentric fastener (105) having a disc-shaped third seat (1051) and an eccentric shaft (1054). A threaded hole (1052) is provided at the center of the third seat (1051) and the eccentric shaft (1054), and the central axis of the eccentric shaft (1054) is offset from the central axis of the threaded hole (1052).

9. A shower enclosure, characterized in that, The shower enclosure includes at least one movable door and a track assembly according to any one of claims 1 to 8.

10. The shower enclosure as claimed in claim 9, wherein, The shower enclosure includes two movable doors that share a track and are respectively arranged on opposite sides of the track in the third direction. The rollers of the two movable doors are arranged alternately on the track, with the inner roller of one movable door arranged between the two rollers of the other movable door.