Anti-derailing pulley device of a mobile door and shower room

Abstract

The utility model discloses a kind of anti-derailing pulley device of mobile door and shower room, anti-derailing pulley device includes the support frame for being set in the bottom of mobile door and the pulley assembly for rolling fit with the lower guide rail of mobile door, pulley assembly is set in support frame by guiding structure and can move up and down;Reset piece is arranged between pulley assembly and support frame, when mobile door occurs jump rail, reset piece drives pulley assembly to move downward relative to support frame, to make pulley assembly and lower guide rail keep rolling fit state.The utility model solves the security risk of existing mobile door of shower room derailing, improves the safety and reliability of product.

Description

Technical Field

[0001] This utility model relates to the field of bathroom fixtures, and in particular to an anti-derailment pulley device for a sliding door and a shower room. Background Technology

[0002] Shower enclosures make full use of a corner of the bathroom, clearly defining the shower area with a sliding door and guide rails to form a relatively independent bathing space. The sliding door and guide rails require a pulley system for proper operation. Currently, double sliding door shower enclosures with a bottom-rail load-bearing structure generally lack effective anti-derailment mechanisms. For ease of installation, a clearance must be left between the sliding door and the upper guide rail. This structural design meets basic functional requirements under normal use conditions; however, under abnormal operating conditions (such as strong impact or rapid closing), the sliding door is prone to jumping due to inertia, causing the pulley system at the bottom of the sliding door to detach from the guide rail. This poses a serious safety hazard, especially when one side of the sliding door is suddenly braked, the jumping phenomenon on the other side due to inertia is more pronounced, potentially causing the sliding door to completely detach, endangering user safety. Utility Model Content

[0003] This utility model addresses the technical problems existing in the prior art by providing an anti-derailment pulley device for a sliding door and a shower room, thus solving the safety hazard of derailment in existing shower room sliding doors and improving the safety and reliability of the product.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a sliding door anti-derailment pulley device, including a support frame for being installed at the bottom of the sliding door and a pulley assembly for rolling cooperation with the lower guide rail of the sliding door. The pulley assembly is installed in the support frame and can move up and down through a guide structure. A reset member is provided between the pulley assembly and the support frame. When the sliding door derails, the reset member drives the pulley assembly to move downward relative to the support frame so that the pulley assembly and the lower guide rail maintain a rolling cooperation state.

[0005] In a preferred embodiment, the reset member includes an elastic member. When the sliding door is in normal operation, the elastic member is in an energy-storing state. When the sliding door derails, the elastic member releases the stored energy to drive the pulley assembly to move downward relative to the support frame.

[0006] In a preferred embodiment, the support frame includes a housing with an inner cavity and an adjustment assembly. The pulley assembly includes a movable frame and at least one pulley group disposed on the movable frame. The movable frame is disposed in the inner cavity of the housing through a guide structure. The adjustment assembly is movably connected to the movable frame to drive the pulley assembly to move upward or downward relative to the housing.

[0007] In a preferred embodiment, the adjustment assembly includes an elongated adjustment member, a first sliding member, and a second sliding member. The first sliding member and the second sliding member are slidably disposed within the housing in a preset direction. The adjustment member extends in the preset direction and is rotatably connected to the housing around its axis, and is threadedly connected to the first sliding member and the second sliding member. An elastic member and a portion of a movable frame are provided between the first sliding member and the second sliding member, and the two ends of the elastic member respectively abut against and cooperate with a portion of the movable frame and the second sliding member.

[0008] In a preferred embodiment, the preset direction is the length direction of the housing, and the movable frame moves up and down by moving along the inclined direction, and the horizontal component of the inclined direction is consistent with the length direction of the housing; a part of the movable frame is the first side wall of the movable frame, the first side wall is provided with a clearance hole, the clearance hole is elongated and extends in the vertical direction, and the adjusting member passes through the clearance hole.

[0009] In a preferred embodiment, the guide structure includes a pin disposed on the housing and a guide groove disposed on the second side wall of the movable frame. The pin is disposed along the width direction of the housing, and the guide groove is elongated and extends in an inclined direction. The pin and the guide groove are slidably engaged.

[0010] In a preferred embodiment, the adjustment assembly further includes a limiting member, which is an adjustment screw that passes through a mounting hole provided on the side wall of the housing, with its head located on the outside of the housing. The adjustment screw has a tool relief groove located on the inside of the housing. The limiting member is embedded in the tool relief groove and, together with the head of the adjustment screw, restricts the axial degree of freedom of the adjustment screw.

[0011] In a preferred embodiment, the elastic element is sleeved outside the adjusting element, and the elastic element is a spring.

[0012] This utility model also provides a shower room, including a sliding door and a lower guide rail, and also includes an anti-derailment pulley device for the sliding door of this utility model. The support frame is installed at the bottom of the sliding door, and the pulley assembly rolls in cooperation with the lower guide rail.

[0013] In a preferred embodiment, the device further includes a mounting bracket with a first mounting groove at the top and a second mounting groove at the bottom. The bottom of the sliding door is fixed in the first mounting groove, and the support frame is installed in the second mounting groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model has a reset component between the pulley assembly and the support frame. When the sliding door derails, the reset component drives the pulley assembly to move downward relative to the support frame, so that the pulley assembly and the lower guide rail maintain a rolling engagement state, preventing the pulley assembly from dislodging from the lower guide rail. This solves the derailment safety hazard of existing shower room sliding doors and improves the safety and reliability of the product.

[0016] 2. The reset component includes an elastic element. In the normal operation of the sliding door, the elastic element is in an energy-storing state. When the sliding door derails, the elastic element releases the stored energy to drive the pulley assembly to move downward relative to the support frame. This avoids the use of complex mechanical parts, resulting in a simple structure, low cost, fewer failure points, and easier maintenance.

[0017] 3. The support frame includes a housing with an inner cavity and an adjustment component. The adjustment component can drive the pulley assembly to move up or down relative to the housing, thereby flexibly adjusting the height of the sliding door according to the actual installation situation, so as to avoid excessive gap above the sliding door causing derailment.

[0018] 4. The adjustment assembly also includes a limiting component. The adjusting screw has a tool relief groove located inside the housing. The limiting component is embedded in the tool relief groove and together with the head of the adjusting screw, restricts the axial freedom of the adjusting screw, ensuring stability during adjustment and preventing axial movement of the adjusting screw, thereby improving the reliability of the adjustment assembly.

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the anti-derailment pulley device for a sliding door and the shower room of the present invention are not limited to the embodiments. Attached Figure Description

[0020] Figure 1 This is an exploded view of the anti-derailment pulley device of this utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the anti-derailment pulley device of this utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the anti-derailment pulley device of this utility model (rotated at an angle);

[0023] Figure 4 This is a top view of the anti-derailment pulley device of this utility model in its first state;

[0024] Figure 5 yes Figure 4 A cross-sectional view along line AA;

[0025] Figure 6 yes Figure 5 A magnified view of a portion of the image;

[0026] Figure 7 This is a cross-sectional schematic diagram of the anti-derailment pulley device of this utility model in the second state;

[0027] Figure 8 yes Figure 7 A magnified view of a portion of the image;

[0028] Figure 9 This is a partial structural diagram of the shower room of this utility model (sliding door in normal operating state);

[0029] Figure 10 This is a side view of the shower room of this utility model (sliding door in normal operating state);

[0030] Figure 11 yes Figure 10 Enlarged view of point B;

[0031] Figure 12 yes Figure 10 Enlarged view of point C;

[0032] Figure 13 This is a cross-sectional schematic diagram of the anti-derailment pulley device of this utility model in the third state;

[0033] Figure 14 yes Figure 13 A magnified view of a portion of the image;

[0034] Figure 15 This is a partial structural diagram of the shower room of this utility model (the sliding door has jumped off the track);

[0035] Figure 16 This is a side view of the shower room of this utility model (the sliding door has jumped off the track);

[0036] Figure 17 yes Figure 16 Enlarged diagram of point D;

[0037] Figure 18 This is a cross-sectional schematic diagram of the anti-derailment pulley device of this utility model in the fourth state;

[0038] Figure 19 yes Figure 18 A magnified view of a portion of the image;

[0039] Figure 20 This is a cross-sectional schematic diagram of the anti-derailment pulley device of this utility model after the sliding door is raised in the third state;

[0040] Figure 21 yes Figure 20 A magnified view of a portion of the image;

[0041] In the diagram: 1. Sliding door; 2. Housing; 21. Mounting hole; 22. Round hole; 3. Adjustment assembly; 31. Adjusting screw; 311. Relief groove; 32. Square nut; 33. Square bushing; 331. Limiting part; 332. Abutting part; 34. Limiting component; 4. Pulley assembly; 41. Moving frame; 411. First side wall; 412. Clearance hole; 413. Second side wall; 414. Guide groove; 42. Pulley block; 5. Pin; 6. Spring; 7. Lower guide rail; 8. Upper guide rail; 91. First mounting bracket; 92. Second mounting bracket; 10. Upper pulley device. Detailed Implementation

[0042] In this utility model, the terms "first," "second," "third," and "fourth," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "left," "right," "inner," "outer," "top," and "bottom" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, and is only for the convenience of describing this utility model, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation on the scope of protection of this utility model. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] Furthermore, in the description of this utility model, unless otherwise stated, "at least one" means one or more. In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0044] Please see Figures 1-21As shown, this utility model discloses an anti-derailment pulley device for a sliding door, comprising a support frame for mounting at the bottom of the sliding door 1 and a pulley assembly 4 for rolling engagement with the lower guide rail 7 of the sliding door 1. The pulley assembly 4 is vertically movable within the support frame via a guide structure. A reset element is provided between the pulley assembly 4 and the support frame. When the sliding door 1 derails, the reset element drives the pulley assembly 4 downward relative to the support frame, maintaining the rolling engagement between the pulley assembly 4 and the lower guide rail 7, preventing the pulley assembly from detaching from the lower guide rail 7. This solves the derailment safety hazard of existing sliding doors in shower rooms, improving the safety and reliability of the product. In this embodiment, all mentioned directions such as "up," "down," "left," "right," "front," and "back" are in reference to... Figure 5 For reference standards.

[0045] The reset element includes an elastic element. During normal operation of the sliding door 1, the elastic element is in an energy-storing state. When the sliding door 1 derails, the elastic element releases its stored energy, causing the pulley assembly 4 to move downwards relative to the support frame. In other embodiments, the reset element can be a magnet assembly, comprising magnets respectively disposed on the pulley assembly and the support frame, so that the pulley assembly moves downwards relative to the support frame through the attraction or repulsion of the two magnets.

[0046] The support frame includes a housing 2 with an inner cavity and an adjusting assembly 3. The pulley assembly 4 includes a movable frame 41 and at least one pulley group 42 disposed on the movable frame 41. In this embodiment, the number of pulley groups 42 is two, but it is not limited to this. The movable frame 41 is disposed in the inner cavity of the housing 2 through a guide structure. The adjusting assembly 3 is movably connected to the movable frame 41 to drive the pulley assembly 4 to move upward or downward relative to the housing 2, thereby flexibly adjusting the height of the sliding door 1 according to the actual installation situation to avoid excessive gap above the sliding door 1 causing derailment.

[0047] The adjusting assembly 3 includes an elongated adjusting member, a first sliding member, and a second sliding member. The first and second sliding members are slidably disposed within the housing 2 in a preset direction. The adjusting member extends in the preset direction and is rotatably connected to the housing 2 around its axis, and is threadedly connected to the first and second sliding members. An elastic member and a portion of a movable frame 41 are provided between the first and second sliding members, and the two ends of the elastic member respectively abut against a portion of the movable frame 41 and the second sliding member. The adjusting assembly 3 also includes a limiting member 34. The adjusting member is an adjusting screw 31, which passes through a mounting hole 21 provided on the side wall of the housing 2, and its head is located outside the housing 2. The adjusting screw 31 has a relief groove 311 located inside the housing 2. The limiting member 34 is embedded in the relief groove 311 and, together with the head of the adjusting screw 31, restricts the axial freedom of the adjusting screw 31. The elastic member is sleeved outside the adjusting member, and the elastic member is a spring 6, that is, the spring 6 is sleeved outside the adjusting screw 31.

[0048] Specifically, the first sliding member is a square nut 32, and the second sliding member is a square bushing 33. The square nut 32 and the square bushing 33 are respectively threaded to the adjusting screw 31. The external structure of the square nut 32 and the square bushing 33 can respectively form a matching constraint with the installation space where they are located, restricting their rotational freedom, so as to convert the rotational motion of the adjusting screw 31 into the linear motion of the square nut 32 and the square bushing 33 in a preset direction.

[0049] The preset direction is the length direction of housing 2 (i.e.) Figure 5 The movable frame 41 moves up and down by moving along the inclined direction (left and right). The horizontal component of the inclined direction is consistent with the length direction of the housing 2. The horizontal inclined direction can be decomposed into two components: a horizontal component and a vertical component. Here, the "horizontal component direction" refers to the projection direction of the inclined direction onto the horizontal plane, that is, the direction of the straight line formed on the horizontal plane when the inclined direction intersects with the horizontal plane. A part of the movable frame 41 located between the first sliding member and the second sliding member is the first side wall 411 of the movable frame 41. The first side wall 411 is provided with a clearance hole 412. The clearance hole 412 is elongated and extends vertically. The adjusting member passes through the clearance hole 412, that is, the adjusting screw 31 passes through the clearance hole 412, so that there is a fitting gap between the clearance hole 412 and the adjusting screw 31 to ensure the adjustable range of the movable frame 41. In this embodiment, when the adjusting screw 31 is rotated clockwise, the square nut 32 and the square bushing 33 move to the right along the axial direction of the adjusting screw 31; when the adjusting screw 31 is rotated counterclockwise, the square nut 32 and the square bushing 33 move to the left along the axial direction of the adjusting screw 31, but are not limited to this.

[0050] The guiding structure includes a pin 5 mounted on the housing 2 and a guide groove 414 mounted on the second side wall 413 of the movable frame 41. The movable frame 41 has two second side walls 413, each connected to both ends of the first side wall 411 in the horizontal direction and perpendicular to the first side wall 411. The pin 5 runs along the width direction of the housing 2 (i.e.,...). Figure 5 The housing 2 is provided with a circular hole 22 through which the pin 5 can pass (in the front-back direction). The guide groove 414 is elongated and extends in an inclined direction. Specifically, the guide groove 414 extends upward inclinedly in the direction away from the first side wall 411 of the movable frame 41, and the inclination angle of the guide groove 414 relative to the horizontal plane is 45 degrees. The pin 5 slides in conjunction with the guide groove 414.

[0051] Specifically, the square nut 32 is rectangular, with its length slightly less than the width of the inner cavity of the housing 2. The square nut 32 has a threaded hole that runs through its thickness and mates with the adjusting screw 31. The square bushing 33 includes a limiting part 331 and an abutment part 332 located on one side of the limiting part 331 in the thickness direction. The limiting part 332 is square, and the abutment part 331 is cylindrical. The side length of the limiting part 331 is slightly less than the distance between the two second side walls 413 of the movable frame 41. The square bushing 33 has a threaded hole that runs through the limiting part 332 and the abutment part 331 and mates with the adjusting screw 31. During installation, the abutment part 332 is close to the first side wall 411 of the movable frame 41. The spring 6 is sleeved outside the adjusting screw 31 and the abutment part 332, and the spring 6 abuts between the first side wall 411 of the movable frame 41 and the limiting part 331.

[0052] During assembly, first, the two pulley groups 42 are fixedly connected to the movable frame 41 to form an integrated pulley assembly 4. The pulley assembly 4 is installed in the inner cavity of the housing 2, and the pin 5 is fixed to the housing 2 through the round hole 22 and slidably engaged with the guide groove 414. The adjusting screw 31 passes through the mounting hole 21 on the housing 2 and is threadedly connected to the square nut 32. Then, it passes through the clearance hole 412 on the movable frame 41. The spring 6 is fitted onto the adjusting screw 31, and then the square bushing 33 is connected so that the spring 6 abuts between the first side wall 411 of the movable frame 41 and the limiting part 331 of the square bushing 33. Then, the limiting member 34 is embedded in the relief groove 311 of the head of the adjusting screw 31 to form an axial constraint, so that the adjusting screw 31 can only rotate around its axis and cannot move axially. This completes the anti-derailment pulley device.

[0053] The working principle of the anti-derailment pulley device for a sliding door of this utility model is as follows:

[0054] Preliminary preparations: The square nut 32 contacts the outer wall of the first side wall 411 of the movable frame 41, forming an initial positioning reference. The two ends of the spring 6 abut against the first side wall 411 of the movable frame 41 and the limiting part 331 of the square bushing 33, respectively, maintaining a pre-compressed state. At this time, the pin 5 is at the highest position of the guide groove 414, that is, the movable frame 41 is at its lowest position relative to the housing 2, constituting the initial assembly position in the first state. Figures 4-6As shown; in the first state, when the adjusting screw 31 is rotated clockwise, the square nut 32 and the square bushing 33 move synchronously to the right along the axial direction of the adjusting screw 31. The square nut 32 pushes the moving frame 41 to the right, and the spring 6 moves to the right with the square bushing 33, while maintaining its original compression. The moving frame 41 converts the horizontal movement to the right into a linear displacement along the direction of the guide groove 414 through the cooperation of the guide groove 414 and the clearance hole 412. When the pin 5 moves to the lowest position of the guide groove 414, that is, the moving frame 41 is at its highest position relative to the housing 2, it constitutes the second state, as shown. Figure 7 , Figure 8 As shown.

[0055] Installed at the bottom of the sliding door 1: When the pin 5 moves to the lowest position of the guide groove 414, that is, when the anti-derailment pulley device is in the second state, it forms the assembly reference state, and is installed at the bottom of the sliding door 1, so that the pulley assembly 4 rolls with the lower guide rail 7. The weight of the sliding door 1 is transmitted to the lower guide rail 7 through the anti-derailment pulley device, forming a load-bearing support structure. The anti-derailment pulley device can roll freely along the extension direction of the lower guide rail 7, realizing the sliding function of the sliding door 1, such as... Figures 9-12 As shown.

[0056] Adjustment after installation at the bottom of sliding door 1: In the second state, when the adjusting screw 31 is rotated counterclockwise, the square nut 32 and the square bushing 33 move synchronously to the left along the axial direction of the adjusting screw 31. The housing 2 and the moving frame 41 remain in their original positions under the action of the sliding door 1, that is, the moving frame 41 is still in the highest position relative to the housing 2. The square bushing 33 moves to the left and compresses the spring 6. Since the force of the spring 6 driving the pulley assembly 4 to move downward relative to the housing 2 is less than the weight of the sliding door 1, the spring 6 remains compressed. When the end face of the abutment part 332 of the square bushing 33 abuts against the inner wall of the first side wall 411 of the moving frame 41, the spring 6 reaches a state close to its limit of compression. At this time, the distance between the square nut 32 and the first side wall 411 of the moving frame 41 is greater than the horizontal projection distance of the guide groove 414, constituting the third state, such as... Figure 13 , Figure 14 As shown.

[0057] When sliding door 1 trips: When the sliding door is in normal operation, such as Figure 11As shown, there is an installation gap Δh between the top of the sliding door 1 and the bottom of the upper guide rail 8 (i.e., the second mounting bracket 92 and the bottom of the upper guide rail 8 described below). Since the anti-derailment pulley device is in the third state at this time, the spring 6 is in a near-limit compression state, storing elastic potential energy. When the sliding door 1 is closed forcefully, and the sliding door jumps up due to the impact, the sliding door 1 instantly disengages from the lower guide rail 7, releasing the gravitational constraint on the anti-derailment pulley device. The spring 6 immediately releases its elastic potential energy, pushing the moving bracket 41 to move downwards and to the left along the guide groove 414. This causes the moving bracket 41 to move downwards relative to the housing 2, making the moving bracket 41 the lowest position relative to the housing 2, thus forming the fourth state. Figure 18 , Figure 19 As shown, the pulley assembly 4 and the lower guide rail 7 are kept in a rolling engagement state to prevent derailment accidents. Figures 15-17 As shown.

[0058] In the third state, the height of the sliding door 1 is adjusted: When it is necessary to raise the height of the sliding door 1, rotate the adjusting screw 31 counterclockwise, causing the square bushing 33 to move to the left. The square bushing 33 pushes the moving frame 41 to move downward and to the left along the guide groove 414, thereby raising the sliding door 1 to any height within the range of the guide groove 414, such as... Figure 20 , Figure 21 As shown; when it is necessary to lower the height of the sliding door 1, rotate the adjusting screw 31 clockwise to make the square nut 32 and the square bushing 33 move to the right simultaneously. When the square bushing 33 moves to the right, the compression of the spring 6 decreases and the elastic force is released. At this time, since the force of the spring 6 driving the pulley assembly 4 to move downward relative to the housing 2 is less than the weight of the sliding door 1, the spring 6 is compressed under the weight of the sliding door 1, and the moving frame 41 moves to the upper right along the guide groove 414. Even if the moving frame 41 moves upward relative to the housing 2, the height of the sliding door 1 is lowered. During this process, the distance between the square nut 32 and the first side wall 411 of the moving frame 41 is always greater than the lateral distance of the horizontal projection of the guide groove 414. After the height of the sliding door 1 is adjusted, the principle of the sliding door 1 jumping off the track is the same as above.

[0059] Please see Figures 1-21 As shown, a shower room according to the present invention includes a sliding door 1 and a lower guide rail 7, and also includes the aforementioned anti-derailment pulley device for the sliding door. The support frame is installed at the bottom of the sliding door 1, and the pulley assembly 4 is in rolling cooperation with the lower guide rail 7.

[0060] This utility model also includes a first mounting bracket 91, which has a first mounting groove at the top and a second mounting groove at the bottom. The bottom of the sliding door 1 is fixed in the first mounting groove, and the support frame is installed in the second mounting groove, i.e., the housing 2 is installed in the second mounting groove. This utility model also includes an upper guide rail 8, a second mounting bracket 92, and an upper pulley device 10. The second mounting bracket 92 has a third mounting groove at the top and a fourth mounting groove at the bottom. The top of the sliding door 1 is fixed in the fourth mounting groove, and the upper pulley device 10 is installed in the third mounting groove and rolls in cooperation with the upper guide rail 8.

[0061] The structure and working principle of the anti-derailment pulley device for the sliding door of this shower room are described in the preceding section and will not be repeated here.

[0062] This utility model relates to an anti-derailment pulley device for a sliding door and a shower room. The parts not described herein are the same as or can be implemented using existing technologies.

[0063] The above embodiments are only used to further illustrate the anti-derailment pulley device for a sliding door and a shower room of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A sliding door anti-derailment pulley device, comprising a support frame for mounting at the bottom of the sliding door and a pulley assembly for rolling engagement with the lower guide rail of the sliding door, wherein the pulley assembly is vertically movable within the support frame via a guide structure; characterized in that: A reset element is provided between the pulley assembly and the support frame. When the sliding door jumps off the track, the reset element drives the pulley assembly to move downward relative to the support frame so that the pulley assembly and the lower guide rail maintain a rolling engagement.

2. The anti-derailment pulley device for a sliding door according to claim 1, characterized in that: The reset component includes an elastic element. In the normal operation state of the sliding door, the elastic element is in an energy storage state. When the sliding door derails, the elastic element releases the stored energy to drive the pulley assembly to move downward relative to the support frame.

3. The anti-derailment pulley device for a sliding door according to claim 2, characterized in that: The support frame includes a housing with an inner cavity and an adjustment assembly. The pulley assembly includes a movable frame and at least one pulley group disposed on the movable frame. The movable frame is disposed in the inner cavity of the housing through the guide structure. The adjustment assembly is movably connected to the movable frame to drive the pulley assembly to move upward or downward relative to the housing.

4. The anti-derailment pulley device for a sliding door according to claim 3, characterized in that: The adjustment assembly includes an elongated adjustment member, a first sliding member, and a second sliding member. The first and second sliding members are slidably disposed within the housing in a preset direction. The adjustment member extends along the preset direction and is rotatably connected to the housing around its axis, and is threadedly connected to the first and second sliding members. An elastic member and a portion of the movable frame are disposed between the first and second sliding members, and the two ends of the elastic member respectively abut against the portion of the movable frame and the second sliding member.

5. The anti-derailment pulley device for a sliding door according to claim 4, characterized in that: The preset direction is the length direction of the housing. The movable frame moves up and down by moving along the inclined direction, and the horizontal component of the inclined direction is consistent with the length direction of the housing. A part of the movable frame is the first side wall of the movable frame. The first side wall is provided with a clearance hole. The clearance hole is elongated and extends in the vertical direction. The adjusting member passes through the clearance hole.

6. The anti-derailment pulley device for a sliding door according to any one of claims 3-5, characterized in that: The guide structure includes a pin on the housing and a guide groove on the second side wall of the movable frame. The pin is arranged along the width direction of the housing, and the guide groove is elongated and extends in an inclined direction. The pin and the guide groove are slidably engaged.

7. The anti-derailment pulley device for a sliding door according to claim 5, characterized in that: The adjustment assembly also includes a limiting member, which is an adjustment screw that passes through a mounting hole on the side wall of the housing and has its head located on the outside of the housing. The adjustment screw has a tool relief groove located on the inside of the housing. The limiting member is embedded in the tool relief groove and, together with the head of the adjustment screw, restricts the axial degree of freedom of the adjustment screw.

8. The anti-derailment pulley device for a sliding door according to claim 4, characterized in that: The elastic element is sleeved outside the adjusting element, and the elastic element is a spring.

9. A shower enclosure, comprising a sliding door and a lower guide rail, characterized in that: It also includes an anti-derailment pulley device for a sliding door as described in any one of claims 1-8, wherein the support frame is installed at the bottom of the sliding door, and the pulley assembly is in rolling cooperation with the lower guide rail.

10. The shower room according to claim 9, characterized in that: It also includes a mounting bracket, which has a first mounting groove at the top and a second mounting groove at the bottom. The bottom of the sliding door is fixed in the first mounting groove, and the support frame is installed in the second mounting groove.

Images