Handrail adjustment device for a shower bench

Abstract

The technical scheme belongs to the technical field of shower stands and specifically relates to a handrail adjusting device of a shower stand, which comprises a main frame body, two arm guards, a locking structure and a reversing structure. The two arm guards are hingedly arranged at the upper end of the main frame body. The locking structure is arranged between the main frame body and the corresponding arm guard and is used for achieving one-way rotation locking of the arm guard relative to the main frame body. The reversing structure is arranged in correspondence with the locking structure and acts on the locking structure, and is used for switching the locking direction of the locking structure on the arm guard, so that the arm guard can be correspondingly opened outward or folded inward. The two arm guards can be selectively folded inward only, the locking structure limits accidental opening of the arm guard when a baby or a child uses the shower stand, and the stability is high, or the two arm guards can be only opened outward, which is convenient for the baby or the child to leave. The distance between the two arm guards can be flexibly adjusted by only actuating the arm guard, the size or the requirement of different users can be adapted, the adaptability of the handrail of the shower stand is improved, and the operation is more convenient.

Description

Technical Field

[0001] This technical solution relates to the field of shower rack technology, and specifically refers to a shower rack armrest adjustment device. Background Technology

[0002] A bath stand is a bathing aid designed specifically for infants and toddlers. Since infants at this stage do not have the ability to stand independently, a bath stand helps them stand, balancing bathing safety with ease of use. It solves the dilemma for parents who need to simultaneously support and clean their babies, reduces the risk of slipping, and saves them time and effort.

[0003] For example, Chinese patent CN307363223S discloses a child standing bath stand (LBN-6268), which provides support for infants and young children when they are standing through a frame structure and underarm braces.

[0004] The two armrests in the aforementioned bathing stand are both fixed designs and cannot be adjusted according to the infant's chest circumference. They can only accommodate infants within a specific chest circumference range. Therefore, in actual use, due to the significant differences in chest circumference among infants of different ages and developmental stages, the fixed armrests may cause discomfort due to clamping too tightly or slippage due to clamping too loosely. As infants grow, their body shape will also change, and fixed-size armrests will be difficult to use for a long time. The product lacks flexibility, has poor adaptability, and is not practical enough.

[0005] Existing adjustable bath racks require one hand to support the infant during use to ensure the child's safety when there is no arm for support. The other hand needs to press the unlock switch to rotate the arm to the desired angle. This operation is cumbersome and provides limited protection for children. If the child loses their grip or struggles suddenly, they are prone to slipping, tipping, or other accidents, making them unsafe. Utility Model Content

[0006] This technical solution addresses the safety hazards and inconvenience of existing adjustable armrest adjustment methods for shower racks by providing a new armrest adjustment device.

[0007] The purpose of this technical solution is achieved as follows: A handrail adjustment device for a shower rack includes a main frame and further includes: Both guard arms are hinged to the upper end of the main frame; A locking structure is provided between the main frame and the corresponding guard arm to achieve unidirectional rotation locking of the guard arm relative to the main frame. A reversing structure is provided corresponding to the locking structure. The reversing structure acts on the locking structure to switch the locking direction of the locking structure on the guard arm, so that the guard arm can open outward or close inward accordingly.

[0008] Through the above technical solution, when the handrail adjustment device of a bath rack is in normal use, the locking structure set between the main frame and each arm allows the arm to be rotated and locked in one direction relative to the main frame. At the same time, the reversing structure that cooperates with the locking structure can switch the locking direction. That is, in normal use, the reversing structure acts on the locking structure, selectively allowing the two arms to only close inward, thus restricting accidental opening when used by infants and young children and providing stability, or allowing the two arms to only open outward, making it easier for infants and young children to leave. The distance between the two arms can be flexibly adjusted by simply moving the arms, adapting to the body shape or needs of different users, improving the adaptability of the bath rack handrail, and making the operation more convenient.

[0009] Preferably, the locking structure includes: The upper end of the main frame is fitted with a ratchet seat, and the ratchet seat has tooth segments protruding from the opposite sides of the two guard arms. A swinging latch is rotatably disposed within the corresponding guard arm. The swinging latch has a first tooth and a second tooth that can respectively mesh with the tooth segment. The swinging latch has an abutment surface. The swinging latch also has a slot along the side wall, which includes a first type slot area and a second type slot area. A locking member is used to restrict the rotation of the swinging locking member. When the locking member is pressed against the first type of slot area, the first tooth engages with the tooth segment, and the abutting surface abuts against the tooth segment, restricting the guard arm from rotating in the first direction. By operating the reversing structure, when the locking member is pressed against the second type of slot area, the second tooth engages with the tooth segment, and the abutting surface abuts against the tooth segment, thereby restricting the guard arm from rotating in the second direction opposite to the first direction.

[0010] Through the above technical solution, when the locking component is engaged in the first type of slot area, the first tooth of the swinging locking component meshes with the tooth segment of the ratchet seat, and the abutment surface presses against the tooth segment, completely locking the inward rotation of the guard arm (first direction); by operating the reversing structure to rotate the swinging locking component, the locking block avoids, and the second type of slot area is rotated to engage with the locking component. At this time, the first tooth separates from the tooth segment, the second tooth meshes with the tooth segment accordingly, and the abutment surface is reversed to limit the movement, thus locking the outward rotation of the guard arm (second direction). This design achieves bidirectional switchable unidirectional locking through mechanical interlocking. The tight engagement of the locking component in the slot area ensures the stability of the tooth meshing, and the double force of the abutment surface and the tooth segment enhances the torsional strength, so that the guard arm can withstand a certain amount of push and pull force in any adjustment position, reducing the possibility of accidentally releasing the guard arm from the locked state due to excessive force. It achieves stepless adjustment effect of switching locking direction and bidirectional reliable load bearing to adapt to different usage scenarios.

[0011] Preferably, the locking element includes: A locking sleeve, which is fixed to the guard arm, has an opening, and the opening is formed with a retaining edge on its inner side to limit the locking block from disengaging. The locking block slides within the locking sleeve; and The elastic element pushes the locking block out of the opening by elastic force, and the elastic element makes the locking block tend to press against the first type of slot area or the second type of slot area.

[0012] Through the above technical solution, during the repeated switching between the first type of slot area and the second type of slot area on the swing card, the locking block is pushed to overcome the elastic force of the elastic element to avoid it. After adjustment and alignment, the elastic force pushes the locking block, and the part of the locking block protruding from the opening is pressed against the corresponding slot area, thereby realizing the locking element to turn and lock the swing card and quick switching.

[0013] Preferably, the commutation structure includes: A mounting post, disposed on the inner wall of the guard arm, the mounting post having a cavity and a movable groove communicating with the side of the cavity; and A reversing shaft is inserted into the column cavity and rotatably disposed relative to the mounting column. A limiting part protrudes from the side of the reversing shaft. The rotation of the limiting part is limited within the movable groove. One side wall of the limiting part is used to abut against the side wall of the movable groove, and the other side wall is left with swing space between it and the opposite side wall of the movable groove. The swinging clamp is provided with movable holes for corresponding fitting with the reversing shaft and the limiting part. The rotation of the reversing shaft drives the swinging clamp to rotate synchronously, thereby realizing the switching of different slot areas and fitting with the locking block.

[0014] Through the above technical solution, the rotating reversing shaft pushes against the inner wall of the movable hole through the limiting part, thereby driving the swinging locking part to rotate synchronously, forcing the locking block to disengage from the original slot area and slide to the corresponding target slot area (type 1 or type 2) on the side wall of the swinging locking part; the rotation of the limiting part in the movable slot will abut against the relative inner side wall of the movable slot, precisely limiting the range of the rotation angle of the locking part and preventing the mechanism from jamming; when the guard arm is pried, the limiting part abuts against one side of the movable slot, which can rigidly limit the rotation of the swinging locking part in that direction, while the swing space reserved on the other side allows the swinging locking part to generate a controllable micro-swing in the reverse direction, so that the teeth change the meshing position one by one through the teeth of the tooth segment, realizing a one-way locking mechanism.

[0015] Preferably, the guard arm includes an upper housing and a lower housing seat that matches the upper housing, wherein the lower housing seat is integrally formed with the mounting post; The upper housing is provided with a fixing seat, and the fixing seat has a fixing groove that matches the locking sleeve. The two ends of the elastic element abut against the corresponding side walls of the locking block and the fixing groove, respectively. The lock sleeve has protruding lugs on both sides, and each lug has a countersunk hole. The fixing groove has a threaded hole for bolt connection corresponding to the countersunk hole.

[0016] Through the above technical solution, the guard arm is divided into two parts, which makes it easy to disassemble the lower housing and install the locking structure and reversing structure inside the guard arm; it is fitted into the matching fixing groove, the countersunk holes of the two lugs are aligned with the two threaded holes at the bottom of the groove, and the two bolts are screwed into the two threaded holes after passing through the countersunk holes of the lugs on both sides, so as to realize the installation and fixing of the lock sleeve. The inner wall of one side of the fixing groove can be used for the elastic element to abut.

[0017] Preferably, the slot portion has an arc surface, and the locking block is configured as a ball bearing.

[0018] With the above technical solution, when the user rotates the reversing shaft, the balls are pushed by the elastic element to roll smoothly along the arc surface, converting sliding friction into rolling friction, reducing resistance, and achieving smooth reversing.

[0019] Preferably, both the first tooth portion and the second tooth portion include two protruding teeth, and a tooth groove is formed between the two protruding teeth, wherein the tooth groove matches any tooth of the tooth segment.

[0020] Through the above technical solution, equidistant tooth grooves are formed between the two convex teeth, and the tooth grooves and all the teeth of the tooth segment form a full-stroke adaptive meshing.

[0021] Preferably, the reversing shaft is provided with at least two buckles, and a clearance gap is left between the buckles and the reversing shaft. Each buckle includes an extension and a snap-fit ​​portion disposed at the end of the extension. The swinging clamp is provided with a snap-fit ​​groove for snap-fit ​​portions to snap into each other.

[0022] With the above technical solution, the buckle uses the elastic deformation of the clearance gap to cross the inlet of the snap-fit ​​groove, while the reversing shaft passes through the movable hole, and the wedge surface of the snap-fit ​​part guides it until the snap-fit ​​part is fitted into the snap-fit ​​groove to complete the locking, making the installation convenient and stable.

[0023] Preferably, the swinging clamp is provided with an annular groove along the outer side of the movable hole, and the upper housing extends a positioning post corresponding to the annular groove, with the end of the positioning post embedded in the annular groove.

[0024] Through the above technical solution, the end of the columnar positioning body is precisely embedded in the annular groove to form a constraint, further restricting the swinging clamp from detaching from the reversing shaft and improving the connection strength.

[0025] Preferably, the main frame has a mounting base, the mounting base has a side protrusion with a limited rotation part, and the ratchet seat has a matching limited rotation hole corresponding to the mounting base and the limited rotation part. The ratchet seat is mounted on the mounting base through the limited rotation hole, so that the ratchet seat and the main frame are fixed in relative rotation. The reversing shaft is equipped with a screw head, and the screw head has a protruding slotted block.

[0026] Through the above technical solution, the rotation limiting part penetrates the rotation limiting hole to form a circumferential hard constraint, thereby realizing the stable installation of the ratchet seat on the main frame.

[0027] Users can operate the dial on the screw head to rotate the axis of rotation, which is more labor-saving. The outer wall of the lower housing can also be marked. By pointing the dial to different marks, it is easy to quickly identify the rotation direction of the guard arm.

[0028] The key and beneficial technical effects of this technical solution compared to existing technologies are: 1. This technical solution uses a reversing structure to control a locking structure that can switch the locking direction, so as to realize the one-way rotation locking of the arm guard. The locking direction can be flexibly switched. The arm guard can only be closed inward to enhance stability and safety and prevent infants and young children from accidentally opening it, or it can only be opened outward to facilitate entry and exit. The distance between the two arm guards can be flexibly adjusted by simply moving the arm guard, so as to adapt to the body shape or needs of different users, improve the adaptability of the bath rack arm guard, and make the operation more convenient. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 This is a partial explosion diagram of this embodiment; Figure 3 This is a schematic diagram of a partial explosion of the arm guard in the embodiment; Figure 4 This is one of the partial explosion diagrams of the locking structure in the embodiment; Figure 5 This is the second partial explosion diagram of the locking structure in the embodiment; Figure 6 This is a partial cross-sectional view of this embodiment; Figure 7 This embodiment Figure 6 Enlarged view of a portion; Figure 8 For this embodiment Figure 7 A schematic diagram of another state of the locking structure.

[0030] Reference numerals: 1. Main frame; 2. Guard arm; 21. Upper shell; 22. Lower shell base; 3. Locking structure; 31. Tooth segment; 32. Swinging latch; 33. Locking element; 331. Lock sleeve; 332. Locking block; 333. Elastic element; 4. Reversing structure; 41. Mounting column; 42. Reversing shaft; 5. Racket seat; 61. First tooth; 62. Second tooth; 601. Protruding tooth; 602. Tooth groove; 7. Slot; 71. First type slot area; 72. Second type slot area; 8. Opening; 9. Edge guard; 10. Column cavity; 11. Movable groove; 12. Limiting part; 13. Movable hole; 14. Fixed seat; 15. Fixed groove; 16. Lug; 161. Countersunk hole; 162. Threaded hole; 17. Snap fastener; 171. Extension part; 172. Snap-fit ​​part; 18. Relief gap; 19. Snap-fit ​​groove; 20. Annular groove; 23. Positioning post; 24. Tightening head; 241. Flat-bottomed lever; 25. Mounting seat; 26. Rotation limiting part; 27. Rotation limiting hole; 28. Abutment surface; 701. Curved surface. Detailed Implementation

[0031] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0032] Example: See Figure 1 and Figure 2 A handrail adjustment device for a shower rack includes a main frame 1, two guard arms 2, a locking structure 3, and a reversing structure 4. The guard arms 2 are horn-shaped, and both guard arms 2 are hinged to the upper end of the main frame 1 through through holes, and have the same hinge axis, so that the two guard arms 2 can rotate relative to each other to approach and close or separate and open. The main frame 1 has a mounting base 25, which is set at the upper end of the main frame 1. The front side of the mounting base 25 protrudes a limited rotation part 26. The main frame 1 is provided with a ratchet seat 5, which has matching limited rotation holes 27 corresponding to the mounting base 25 and the limited rotation part 26. During assembly, one guard arm 2 (such as the right guard arm) is first put on the main frame 1, and then the limited rotation hole 27 of the ratchet seat 5 is aligned with the mounting base 25 and fitted into it, so that the ratchet seat 5 is relatively fixed to the main frame 1 and the rotation is restricted. Then, the other guard arm 2 (such as the left guard arm) is put on the main frame 1, and the two guard arms 2 together cover the ratchet seat 5.

[0033] See Figure 3 , Figure 4 as well as Figure 5Each guard arm 2 consists of an upper housing 21 and a matching lower housing 22. The upper housing 21 and the lower housing 22 are bolted together. Each guard arm 2 is equipped with a locking structure 3 and a corresponding reversing structure 4 between itself and the main frame 1. The reversing structure 4 includes a mounting post 41 and a reversing shaft 42. The mounting post 41 is integrally formed inside the lower housing 22. The mounting post 41 has a column cavity 10 and a movable groove 11 communicating with the side of the column cavity 10. Both the column cavity 10 and the movable groove 11 extend to the lower surface of the lower housing 22. The reversing shaft 42 is equipped with a screw head 24, which protrudes from the lower end of the reversing shaft 42. A slotted block 241 protrudes from the side of the screw head 24 away from the reversing shaft 42. A limiting part 12 protrudes from the side of the reversing shaft 42. During assembly, the reversing shaft 42 is inserted into the column cavity 10 from the lower side of the lower housing 22, and the limiting part 12 is correspondingly inserted into the movable groove 11. The screw head 24 abuts against the lower end face of the lower housing 22 to limit the excessive axial insertion of the reversing shaft 42. The reversing shaft 42 is rotatably connected in the mounting post 41. Since the width of the movable groove 11 is greater than the thickness of the limiting part 12, the user drives the reversing shaft 42 to rotate by turning the swivel block 241. Its rotation angle is limited by the swing range of the limiting part 12 in the movable groove 11. When the side wall of the limiting part 12 abuts against any side wall of the movable groove 11, there is a swing space between the other side wall and the opposite side wall of the movable groove 11.

[0034] The locking structure 3 includes a toothed segment 31, a swinging latch 32, and a locking element 33. The toothed segment 31 protrudes from the side of the ratchet seat 5. The ratchet seat 5 has toothed segments 31 protruding from the opposite sides of the two guard arms 2. The toothed segment 31 is composed of a number of teeth. The swinging latch 32 is located inside the guard arm 2 and is fixed to the reversing shaft 42. Specifically, the reversing shaft 42 is symmetrically provided with two latches 17. Each latch 17 includes an extension 171 integrally formed with the reversing shaft 42 and a part extending from the extension. The outer end of the snap-fit ​​part 171 protrudes outward. The snap-fit ​​17 and the reversing shaft 42 have clearance slots 18 on both sides, so that the snap-fit ​​17 can have elastic deformation capability relative to the reversing shaft 42. The swing snap-fit ​​part 32 has a movable hole 13 that matches the reversing shaft 42 and the limiting part 12. The swing snap-fit ​​part 32 has two snap-fit ​​grooves 19 along the movable hole 13. The snap-fit ​​grooves 19 are connected to the side wall of the movable hole 13, and the positions of the two snap-fit ​​grooves 19 correspond one-to-one with the two snap-fit ​​parts 17.

[0035] During assembly, the movable hole 13 of the swing clamp 32 is aligned with the reversing shaft 42 for fitting. The two side latches 17 are pressed together to pass through the movable hole 13 until the push-in latching part 172 reaches the latching groove 19. The latches 17 quickly return to their original position due to their own elasticity. The two side latching parts 172 fit into the corresponding two latching grooves 19. The fitting of the latching part 172 and the latching groove 19 forms a firm mechanical connection, thereby realizing the fixed connection between the swing clamp 32 and the reversing shaft 42.

[0036] The swing clamp 32 has an annular groove 20 along the outer side of the movable hole 13, located on the side of the swing clamp 32 where the locking groove 19 is provided. The upper housing 21 has a positioning post 23 extending from the position corresponding to the annular groove 20. Its size matches the annular groove 20. When the upper housing 21 and the lower housing 22 are installed, the end of the positioning post 23 is inserted into the annular groove 20, providing additional axial limit and further preventing the swing clamp 32 from accidentally axially disengaging from the reversing shaft 42.

[0037] The locking member 33 includes a locking sleeve 331, a locking block 332, and an elastic member 333. The locking member 33 is preferably a ball bearing, which is embedded in the locking sleeve 331. One end of the locking sleeve 331 has an opening 8 and the other end has a placement opening. A retaining edge 9 is formed on the inner side of the opening 8 in the circumferential direction. The diameter of the locking member 33 is smaller than the sleeve hole in the locking sleeve 331 and larger than the channel opening on the inner side of the retaining edge 9. The swinging locking member 32 has a slot 7 formed along the side wall. The slot 7 includes a first type slot area 71 and a second type slot area 72 that are spaced apart. The slot walls in the first type slot area 71 and the second type slot area 72 are both set as arc surfaces 701. The curvature of the arc surface 701 is adapted to the spherical surface of the ball-shaped locking member 33. Alternatively, the locking member 33 can also use plastic protrusions. The swinging locking member 32 achieves the switching of different slot areas by squeezing the plastic protrusions.

[0038] The swinging latch 32 has a first tooth 61 and a second tooth 62 that can respectively mesh with the tooth segment 31. The swinging latch 32 has an abutment surface 28, which is set as a plane on the side of the swinging latch 32 away from the latching slot 7. The first tooth 61 and the second tooth 62 are respectively located at the two ends of the plane. The first tooth 61 and the second tooth 62 each include two protruding teeth 601. A tooth groove 602 is formed between the two protruding teeth 601. The tooth groove 602 matches any tooth in the tooth segment 31.

[0039] The locking sleeve 331 is installed by a fixing seat 14 on the inner side of the upper housing 21. The fixing seat 14 has a fixing groove 15 that matches the locking sleeve 331. The fixing groove 15 has two threaded holes 162. The locking sleeve 331 has lugs 16 protruding on opposite sides. Both lugs 16 have countersunk holes 161 through them. Their positions correspond one-to-one with the two threaded holes 162. The bolt is passed through the corresponding countersunk hole 161 and screwed into the threaded hole 162 for connection, thereby realizing the fixed connection of the locking part 33.

[0040] The elastic element 333 is preferably a return spring, which is also embedded in the lock sleeve 331. One end of the elastic element 333 abuts against the rear side of the locking element 33, and the other end abuts against the inner wall of the corresponding fixing groove 15. Its elastic force pushes the locking element 33 to move, so that the locking element 33 tends to press against the stop edge 9. At this time, part of the locking element 33 protrudes out of the opening 8, so that the locking element 33 abuts against the arc surface 701 in the corresponding groove of the first type of slot area 71 or the second type of slot area 72.

[0041] See Figure 6 and Figure 7 The guard arm 2 is unidirectionally rotatable and locked relative to the main frame 1. It can rotate in either the first direction or the second direction. The first direction is the direction in which the guard arm 2 closes, and the second direction is the opposite of the first direction, which is the direction in which the guard arm 2 opens.

[0042] First state: Under the action of the elastic element 333, the outer end of the locking block 332 is pushed to abut against the arc surface 701 in the first type of slot area 71. This pre-tightening force inhibits the free rotation of the swinging locking element 32, keeping it stable. At this time, the first tooth 61 meshes with the tooth segment 31, and the limiting part 12 reserves swing space in the movable groove 11 along the first direction (combined with...). Figure 5 As shown in the diagram, when the user operates the guard arm 2 to rotate in the first direction (closed), the force applied by the tooth segment 31 to the first tooth 61 will overcome part of the pressure of the elastic member 333, forcing the swinging clamp 32 and the reversing shaft 42 to rotate slightly, and the limiting part 12 will swing towards the swing space side. During this rotation, the first tooth 61 will disengage from the tooth segment 31. As the guard arm 2 is rotated and adjusted, the first tooth 61 will continuously pass through each tooth on the tooth segment 31, maintaining the disengaged state. After the guard arm 2 is rotated to the desired position, the first tooth 61 falls down again and engages with the corresponding tooth at the new position, completing the adjustment.

[0043] When an attempt is made to push the guard arm 2 from the second direction, the abutting surface 28 on the outer side of the first tooth segment 31 presses against the end of the corresponding tooth in the tooth segment 31. At the same time, the limiting part 12 abuts against the other side wall of the movable groove 11 along the second direction, effectively locking the rotation of the guard arm 2 along the second direction, and realizing the one-way locking adjustment mode of the guard arm 2 along the first direction.

[0044] See Figure 6 and Figure 8Switching to the second state, i.e., the guard arm 2 is locked and rotated in the second direction: by rotating the reversing shaft 42, it drives the swinging locking piece 32 to rotate synchronously. The applied rotational force is sufficient to overcome the elastic force applied to the locking block 332 by the elastic member 333. Under the pushing action of the arc surface 701, the locking block 332 is pressed inward (avoidance), disengaging from the first type of slot area 71 where it is currently located, and turning the second type of slot area 72 to the locking block 332. The elastic member 333 pushes the locking block 332 to re-embed into the second type of slot area 72. At this time, the second tooth 62 meshes with the tooth segment 31. Specifically, it is the same as the above-mentioned guard arm 2 opening operation, except that the guard arm 2 is allowed to rotate and open in the second direction, while its rotation in the first direction is restricted.

[0045] The specific work process of this plan is as follows: This technical solution utilizes a locking structure 3 positioned between the main frame 1 and each arm 2. The arm 2 can be unidirectionally rotated and locked relative to the main frame 1. Simultaneously, a reversing structure 4, working in conjunction with the locking structure 3, can switch the locking direction. During normal use, the reversing structure 4 operates on the locking structure 3, selectively allowing the two arms 2 to close inwards only, thus preventing accidental opening by the locking structure 3 and providing stability. Alternatively, the two arms 2 can open outwards only, facilitating the infant's exit. The distance between the two arms 2 can be flexibly adjusted simply by moving the arms, adapting to different user body types and needs, improving the adaptability of the bath rack's handrails, and enhancing operational convenience.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. A handrail adjustment device for a shower stand, comprising a main frame (1), characterized in that, Also includes: Two guard arms (2) are hinged to the upper end of the main frame (1); The locking structure (3) is set between the main frame (1) and the corresponding guard arm (2) to realize the one-way rotation locking of the guard arm (2) relative to the main frame (1); A reversing structure (4) is provided corresponding to the locking structure (3). The reversing structure (4) acts on the locking structure (3) to switch the locking direction of the locking structure (3) on the guard arm (2), so that the guard arm (2) can open outward or close inward accordingly.

2. The handrail adjustment device for a shower rack according to claim 1, characterized in that: The locking structure (3) includes: Tooth segment (31), the upper end of the main frame (1) is fitted with a ratchet seat (5), the ratchet seat (5) protrudes from the opposite sides of the two guard arms (2); A swinging latch (32) is rotatably disposed within the corresponding guard arm (2). The swinging latch (32) has a first tooth (61) and a second tooth (62) that can respectively mesh with the tooth segment (31). The swinging latch (32) has an abutment surface (28). The swinging latch (32) also has a slot (7) along its side wall. The slot (7) includes a first type slot area (71) and a second type slot area (72). The locking member (33) is used to restrict the rotation of the swinging clamp (32). When the locking member (33) is pressed against the first type of slot area (71), the first tooth (61) meshes with the tooth segment (31) and the abutting surface (28) abuts against the tooth segment (31), restricting the guard arm (2) from rotating in the first direction. By operating the reversing structure (4), when the locking member (33) is pressed against the second type of slot area (72), the second tooth (62) meshes with the tooth segment (31) and the abutting surface (28) abuts against the tooth segment (31), thereby restricting the guard arm (2) from rotating in the second direction opposite to the first direction.

3. The handrail adjustment device for a shower rack according to claim 2, characterized in that: The locking element (33) includes: A locking sleeve (331) is fixed to the arm guard (2). The locking sleeve (331) has an opening (8) and the opening (8) has a retaining edge (9) formed along its inner side to restrict the locking block (332) from dislodging. The locking block (332) slides within the locking sleeve (331); and The elastic element (333) pushes the locking block (332) out of the opening (8) by elastic force, and the elastic element (333) makes the locking block (332) tend to press against the first type of slot area (71) or the second type of slot area (72).

4. The handrail adjustment device for a shower rack according to claim 3, characterized in that: The commutation structure (4) includes: A mounting post (41) is disposed on the inner wall of the guard arm (2), the mounting post (41) having a through-hole (10) and a movable groove (11) communicating with the side of the through-hole (10); and A reversing shaft (42) is inserted into the column cavity (10) and rotatably disposed relative to the mounting column (41). A limiting part (12) protrudes from the side of the reversing shaft (42). The rotation of the limiting part (12) is limited within the movable groove (11). One side wall of the limiting part (12) is used to abut against the side wall of the movable groove (11), and the other side wall is left with swing space between it and the opposite side wall of the movable groove (11). The swinging card (32) is provided with a movable hole (13) for corresponding fitting with the reversing shaft (42) and the limiting part (12). The swinging card (32) is driven to rotate synchronously by the rotation of the reversing shaft (42) to realize the switching of different card slot areas and fitting with the locking block (332).

5. The handrail adjustment device for a shower rack according to claim 4, characterized in that: The arm guard (2) includes an upper housing (21) and a lower housing seat (22) that matches the upper housing (21), and the lower housing seat (22) is integrally formed with the mounting post (41); The upper housing (21) is provided with a fixing seat (14), and the fixing seat (14) has a fixing groove (15) that matches the locking sleeve (331). The two ends of the elastic element (333) abut against the corresponding side walls of the locking block (332) and the fixing groove (15). The lock sleeve (331) has protruding lugs (16) on both sides, and each lug (16) has a countersunk hole (161). The fixing groove (15) has a threaded hole (162) for bolt connection corresponding to the countersunk hole (161).

6. The handrail adjustment device for a shower rack according to claim 3, characterized in that: The slot (7) has an arc surface (701), and the locking block (332) is configured as a ball bearing.

7. The handrail adjustment device for a shower rack according to claim 2, characterized in that: Both the first tooth portion (61) and the second tooth portion (62) include two protruding teeth (601), and a tooth groove (602) is formed between the two protruding teeth (601). The tooth groove (602) matches any tooth of the tooth segment (31).

8. The handrail adjustment device for a shower rack according to claim 4, characterized in that: The reversing shaft (42) is provided with at least two buckles (17), and a clearance gap (18) is left between the buckles (17) and the reversing shaft (42). Each buckle (17) includes an extension (171) and a snap-fit ​​part (172) provided at the end of the extension (171). The swing clamp (32) is provided with a snap-fit ​​groove (19) for snap-fitting the snap-fit ​​part (172).

9. The handrail adjustment device for a shower rack according to claim 5, characterized in that: The swing clamp (32) has an annular groove (20) along the outside of the movable hole (13), and the upper housing (21) has a positioning post (23) extending from the annular groove (20), with the end of the positioning post (23) embedded in the annular groove (20).

10. The handrail adjustment device for a shower rack according to claim 4, characterized in that: The main frame (1) has a mounting base (25), and a limited rotation part (26) protrudes from the side of the mounting base (25). The ratchet seat (5) has matching limited rotation holes (27) corresponding to the mounting base (25) and the limited rotation part (26). The ratchet seat (5) is mounted on the mounting base (25) through the limited rotation holes (27), so that the ratchet seat (5) and the main frame (1) are fixed to rotate relative to each other. The reversing shaft (42) is provided with a screw head (24), and the screw head (24) has a protruding flat paddle (241).

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