Locking structure of inclined plane rotating handrail

Abstract

The utility model discloses a locking structure of a slope rotating handrail, which comprises a handrail seat, a base, a limiting piece, a locking piece and a control piece, and the handrail seat is provided with an inclined rotating surface; the base is arranged on the armrest seat and obliquely rotates on the rotating surface; the limiting piece is arranged on the base in a sliding mode and synchronously rotates along with the base. The locking piece is located in the base and fixed relative to the armrest base. The locking piece is obliquely arranged along the rotating face. A plurality of limiting grooves are formed in the locking piece in the circumferential direction, and when the limiting piece rotates along with the base, the limiting piece selectively enters the different limiting grooves to lock the base; the control piece is configured to control the limiting piece to leave or enter the limiting groove; the base is obliquely and rotatably arranged on the armrest seat, the base and the armrest seat are locked after the base rotates through the limiting piece and the locking piece, the limiting piece can be controlled by the control piece to leave or enter the limiting groove, and the supporting stability is high; the inclined plane rotation is realized through the inclined rotating plane, so that the armrest for supporting the arm of a human body at different positions better conforms to the ergonomics.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a locking structure of an inclined rotating armrest. Background Art

[0002] In order to improve the comfort of the seat, the existing seats are generally equipped with armrests to support the user's arms and improve the comfort of sitting. Generally, the existing seat armrests are mainly divided into fixed armrests and movable armrests. The fixed armrests are fixedly arranged on the seat to provide arm support function, and the movable armrests can adjust the position and posture of the armrest relative to the seat, so as to support the human body's arms in different human body postures.

[0003] There are many types of movable armrests. The more common ones are armrests with lifting functions and rotating armrests with rotation functions. Some rotating armrests rotate on a vertical plane, while others rotate on a horizontal plane. However, the simple movements of these two types of rotating armrests cannot adapt well to the arm postures of the human body in different occasions, and therefore cannot provide comfortable support. Therefore, a structure is needed that can adapt to the arm postures of the human body in more scenarios while ensuring the stability of the arm support provided by the armrests. Summary of the invention

[0004] In order to solve the above-mentioned technical problems, the utility model provides a locking structure of an inclined rotating armrest, including an armrest seat, a base, a limit piece, a locking piece and a control piece. The base is inclined and rotatable and is arranged on the armrest seat. The base and the armrest seat are locked after the base is rotated by means of the limit piece and the locking piece. The limit piece can be controlled by the control piece to leave or enter the limit groove, and the support stability is high. The inclined rotation is achieved by the inclined rotating surface, so that the armrest supporting the human arm in different positions is more ergonomic.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A locking structure for an inclined rotating handrail, comprising:

[0007] An armrest seat having an inclined rotating surface;

[0008] A base, which is arranged on the armrest seat and tilts and rotates on the rotating surface;

[0009] A limiter is slidably arranged on the base and rotates synchronously with the base;

[0010] The locking member is located in the base and fixed relative to the armrest seat, and the locking member is arranged obliquely along the rotating surface; the locking member is provided with a plurality of limiting grooves along the circumferential direction, and when the limiting member rotates with the base, the limiting member selectively enters different limiting grooves to lock the base;

[0011] The control member is configured to control the limiting member to leave or enter the limiting groove.

[0012] The base rotates on the inclined rotating surface, and can be adjusted in the left and right directions as well as in the height direction; the limit piece and the locking piece realize the locking of the base by the card connection limit in the limit groove, so as to improve the structural stability of the armrest; the controllability of the cooperation between the limit piece and the locking piece can also be achieved through the control piece, so that the limit piece can be disengaged from the limit groove and unlocked from the locking piece, thereby realizing the adjustment of the armrest to adapt to the arm posture of the human body in different occasions, and also providing stable support when the card connection limit is achieved.

[0013] Preferably, the base includes a receiving groove, and the limiting member, locking member and control member are all arranged in the receiving groove; the armrest seat is provided with a rotating shaft, which is inserted into the base and enters the receiving groove, and the locking member is installed on the rotating shaft. The rotating shaft is inserted into the base to realize the rotational cooperation between the base and the armrest seat; the locking member is installed on the rotating shaft and fixed relatively to the armrest seat, and the locking member is located in the receiving groove of the base, connecting the base and the armrest seat.

[0014] Preferably, a first slide groove is provided on the base along the length direction of the base, and the limiting member is slidably arranged in the first slide groove. Under the action of the first limiting groove, the limiting member can slide along the length direction of the base.

[0015] Preferably, a pressure plate is provided on the base, which is installed on the base from top to bottom and limits the limiter in the first slide slot. The limiter may be separated from the first slide slot under the action of the spring and the control member, and the pressure plate can limit the limiter in the first slide slot.

[0016] Preferably, the cross section of the shaft head is trapezoidal or rectangular, and the shaft head is inserted into the locking member. The shape of the shaft head provides a limit for the locking member to prevent the locking member from rotating.

[0017] Preferably, a mounting groove is formed in the middle section of the first slide groove, a mounting seat is arranged in the mounting groove, and the limiting member includes a slide bar engaged with the locking member and a slider matched with the inclined surface of the control member; the slider is located on the side of the mounting member away from the locking member, the slide bar is inserted into the mounting member, the tail of the slide bar is exposed from the mounting member and connected to the slider by screws. The slide bar can be inserted into the mounting member first, then connected to the slider, and finally installed on the base through the mounting member, so only the mounting member needs to be fixed, and the installation operation is quick and convenient.

[0018] Preferably, the slide bar comprises a clamping portion at the head, a buttress connected to the clamping portion, and a main body connected to the buttress, wherein the clamping portion, the buttress and the main body are integrally formed; the clamping portion has a rectangular cross section, the buttress and the main body have circular cross sections, and the mounting seat is provided with a guide groove corresponding to the shape of the slide bar. The slider can slide in the first slide groove, and when the slider slides, it will drive the slide bar to slide in the guide groove.

[0019] Preferably, the diameter of the abutment is larger than the diameter of the main body, and an elastic member acting on the limiting member is further provided in the first slide groove, the elastic member is sleeved on the main body and abuts against the abutment, and the elastic member is configured to provide elastic force for the limiting member to enter the limiting groove, and the elastic member is located in the guide groove of the mounting seat. The elastic member is a spring, which provides elastic force for the slide bar to move toward the limiting groove.

[0020] Preferably, a latch is provided at the end of the limiter, and the latch is engaged with the limit slot; the latch includes a sliding surface and a stop surface, and the sliding surface is configured so that when the base rotates in one direction, the latch slides on the locking member through the inclined sliding surface and switches between the limit slots; the stop surface is configured so that when the base has a tendency to rotate in another direction, the stop surface prevents the latch from switching between the limit slots. The cooperation between the sliding surface and the stop surface enables the base to rotate upward and inward without obstacles, but cannot smoothly rotate downward and outward to support the human arm; and when the base needs to rotate downward and outward, the latch can be disengaged from the limit slot through the control member to adjust the base.

[0021] Preferably, the control member is slidably arranged on the base along the thickness direction of the base, and the sliding directions of the control member and the limit member are perpendicular; the control member is located beside the limit member, and a first wedge block protruding toward the control member is provided at the tail of the limit member, and a second wedge block protruding toward the limit member is provided on the control member, the first wedge block and the second wedge block are abutted against each other, and when the control member slides, the limit member is driven to slide by the first wedge block and the second wedge block; the base is provided with a second slide groove that penetrates the base along its thickness direction, and the control member is slidably arranged in the second slide groove and protrudes from the bottom surface of the base; a guide rail is provided in the second slide groove; and a convex strip is provided on the surface of the control member. By cooperating between the inclined surfaces of the first wedge block and the second wedge block, the sliding directions of the control member and the limit member can remain vertical and can interact with each other; the guide rail can guide the sliding of the control member, and the convex strip can reduce the friction between the control member and the second slide groove, making it easier for the operator to operate; since the locking member is also inclined, in order to facilitate the movement of the entire structure, the limit member is horizontally arranged on the base as a whole, and can be coordinated with the locking member through an inclined limit column, which simplifies the structure while allowing the limit column to smoothly enter the limit groove.

[0022] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0023] 1. The base rotates on the inclined rotating surface, and can be adjusted in the left and right directions as well as in the height direction; the limiting member and the locking member realize the locking of the base by the clamping limit in the limiting groove, so as to improve the structural stability of the armrest; the controllability of the cooperation between the limiting member and the locking member can also be realized through the control member, so that the limiting member can be separated from the limiting groove and unlocked from the locking member, thereby realizing the adjustment of the armrest to adapt to the arm posture of the human body in different occasions, and also providing stable support when the clamping limit is realized.

[0024] 2. The cooperation between the sliding surface and the stop surface enables the base to rotate upward and inward without obstacles, but cannot rotate downward and outward smoothly to support the human arm; and when the base needs to rotate downward and outward, the control member can be used to disengage the latch teeth from the limit groove and adjust the base.

[0025] 3. Through the cooperation of the inclined surfaces of the first wedge block and the second wedge block, the sliding directions of the control member and the limit member can remain vertical and can interact with each other; the control member is arranged in this way, on the one hand, to facilitate user operation, and on the other hand, to reduce the size of the base and reduce the cost of production and transportation.

[0026] 4. Since the locking piece is also inclined, in order to facilitate the movement of the entire structure, the limiting piece is horizontally arranged on the base as a whole. The inclined limiting column can be matched with the locking piece to simplify the structure while allowing the limiting column to smoothly enter the limiting groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of the rotating armrest in the normal state in Example 1 of the utility model;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of the rotating armrest in Example 1 of the present utility model after rotation;

[0029] Figure 3 A top view of the support member in the rotating armrest in Example 1 of the utility model;

[0030] Figure 4 A side view of the support member in the rotating armrest in the embodiment 1 of the present invention;

[0031] Figure 5 A schematic diagram of the three-dimensional structure of the utility model in Example 1 in which the supporting member is assembled;

[0032] Figure 6 The three-dimensional structure diagram of the locking structure in Example 1 of the utility model is shown in FIG. Figure 1 ;

[0033] Figure 7 The three-dimensional structure diagram of the locking structure in Example 1 of the utility model is shown in FIG. Figure 2 ;

[0034] Figure 8 This is a schematic diagram of the three-dimensional structure of the armrest seat in Example 1 of the utility model;

[0035] Fig. 9 This is a schematic diagram of the three-dimensional structure of the base in Example 1 of the utility model;

[0036] Fig.10This is a schematic diagram of the three-dimensional structure of the control member and the limiting member in Example 1 of the present utility model;

[0037] Fig.11 This is a schematic diagram of the three-dimensional structure of the locking structure in Example 2 of the present utility model;

[0038] Fig.12 This is an exploded view of the slide bar, the slider and the mounting seat in Example 2 of the present utility model;

[0039] Fig.13 This is a cross-sectional view of the slide rod, the slide block and the mounting seat in Example 2 of the present invention.

[0040] The reference numerals of the figures are as follows: armrest seat 1; rod portion 11; plug-in portion 12; rotating seat 13; supporting member 2; base 21; connecting plate 22; cushion 23; rotating surface 3; supporting surface 4; fitting surface 5; rotating column 6; rotating groove 7; rotating shaft 8; limiting portion 81; limiting surface 811; rotating hole 9; limiting member 10; limiting column 101; locking member 14; control member 15; limiting groove 16; accommodating groove 17; first slide groove 18; elastic member 19; pressing plate 20; second slide groove 24; guide rail 25; convex strip 26; first wedge block 27; second wedge block 28; avoidance groove 29; sliding rod 30; clamping portion 301; abutment 302; main body 303; slider 31; mounting seat 32; guide groove 33; mounting groove 34; latching tooth 35; sliding surface 36; stop surface 37. Implementation

[0041] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0043] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0044] The specific implementation of the utility model is as follows: Example

[0045] like Figure 6 , 7As shown, the utility model provides a locking structure for an inclined rotating armrest, comprising an armrest seat 1, a base 21, a limit member 10, a locking member 14 and a control member 15, wherein the limit member 10 is slidably arranged on the base 21 and rotates synchronously with the base 21; the locking member 14 is located in the base 21 and is relatively fixed to the armrest seat 1, and the locking member 14 is inclined along the rotating surface 3; the locking member 14 is provided with a plurality of limit grooves 16 along the circumferential direction, and when the limit member 10 rotates with the base 21, the limit member 10 selectively enters different limit grooves 16 to lock the base 21; the control member 15 is configured to control the limit member 10 to leave or enter the limit groove 16.

[0046] The base 21 rotates on the inclined rotating surface 3, and can be adjusted in the left and right directions as well as in the height direction; the limiting member 10 and the locking member 14 are matched or not through the control member 15. When the limiting member 10 and the locking member 14 are unlocked, the base 21 can rotate on the armrest seat 1, thereby adjusting to adapt to the arm posture of the human body in different occasions. When the limiting member 10 and the locking member 14 are locked, the base 21 and the armrest seat 1 are relatively fixed, which can provide stable support for the human arm.

[0047] The locking structure is applied in a rotating armrest, such as Figure 1-4 As shown, the rotating armrest includes an armrest seat 1 and a supporting member 2, the armrest seat 1 is configured to connect the seat and the supporting member 2, and the supporting member 2 is configured to support a human arm; an inclined rotating surface 3 is provided on the armrest seat 1, and the supporting member 2 is rotatably arranged on the rotating surface 3, and the supporting member 2 has a supporting surface 4 that fits the human arm; the rotating armrest has a normal state, in which the supporting member 2 faces forward and the supporting surface 4 is horizontal; when the rotating armrest rotates in the normal state, the supporting member 2 tilts forward and the supporting surface 4 tilts backward and is lifted upward.

[0048] Since the rotating surface 3 is inclined, the supporting member 2 can not only swing in the left and right directions, but also be adjusted in the height direction, so that the supporting surface 4 that fits the human arm can be adaptively adjusted in all directions; when the relative positions of the supporting member 2 and the armrest seat 1 are changed in two directions, the shape of the rotating armrest also changes accordingly, thereby adapting to the arm postures of users in different occasions such as when looking at mobile phones, typing on the keyboard, playing games, reading books, etc., and providing more comfortable support.

[0049] Specifically, if Figure 1-4As shown, there are two armrest seats 1 and two supporting members 2. The armrest seat 1 is an L-shaped rod. The armrest seat 1 includes a rod portion 11 and a plug-in portion 12 and a rotating seat 13 located at both ends of the rod portion 11. The plug-in portion 12 is used to connect the seat. The rotating seat 13 is tilted on the rod portion 11, and the rotating surface 3 is formed on the rotating seat 13. The rod portion 11, the plug-in portion 12 and the rotating seat 13 are integrally formed; in this embodiment, in the left and right directions, it is inward between the two supporting members 2, and vice versa, it is outward, while in a general rotating armrest, the rotating surface 3 is horizontal, and in this rotating armrest, the rotating surface 3 is inclined outward relative to the horizontal plane, that is, the direction of the rotating surface 3 is upward and outward, so that the supporting member 2 can be tilted upward while rotating inward; in this embodiment, the inclination angle of the rotating surface 3 is 45°.

[0050] like Figure 5 As shown, the supporting member 2 includes a base 21, a connecting plate 22 and a cushion 23. The base 21 is rotatably connected to the armrest seat 1, the connecting plate 22 is fixedly mounted on the base 21 by screws, and the cushion 23 is snap-fitted to the connecting plate 22 by buckles; specifically, as Figure 8 , 9 As shown, the supporting surface 4 is formed on the cushion 23, and the cushion 23 contacts the arm to improve comfort; the base 21 includes an inclined fitting surface 5 corresponding to the rotating surface 3, and a rotating column 6 protruding from the fitting surface 5 is provided on the fitting surface 5, and correspondingly, a rotating groove 7 is opened on the rotating seat 13, and a rotating shaft 8 protruding from the rotating surface 3 is also provided on the rotating seat 13, and the rotating column 6 is hollow to form a rotating hole 9, and the rotating shaft 8 is inserted into the rotating hole 9; the rotating groove 7 is rotationally matched with the rotating column 6, and the rotating shaft 8 is rotationally matched with the rotating hole 9, and the connection stability between the supporting member 2 and the armrest seat 1 is increased through double matching; the rotating column 6 is perpendicular to the fitting surface 5, and the rotating shaft 8 is perpendicular to the rotating surface 3.

[0051] Specifically, if Figure 6-10As shown, the base 21 includes a receiving groove 17, and the limiting member 10, the locking member 14 and the control member 15 are all arranged in the receiving groove 17; the rotating shaft 8 enters the receiving groove 17 after being inserted into the base 21, and the head of the rotating shaft 8 is milled to form a limiting portion 81, and the limiting portion 81 has a non-arc limiting surface 811, and the locking member 14 is installed on the limiting portion 81 of the rotating shaft 8 and is relatively fixed to the rotating shaft 8 through the limiting surface 811; the cross-section of the limiting portion 81 can also be rectangular or trapezoidal; in a normal state, the upper surface of the base 21 is approximately horizontal, and a groove is opened on the base 21 along the length direction of the base 21 A first slide groove 18 is arranged, and the limit member 10 is slidably set in the first slide groove 18. Under normal conditions, the first slide groove 18 is also horizontal, and the limit member 10 installed therein is also approximately horizontal; in order to make the horizontal limit member 10 cooperate with the inclined locking member 14, a limit column 101 is provided at the head of the limit member 10, and the limit column 101 is perpendicular to the rotating surface 3, so that the limit column 101 can smoothly enter the limit groove 16; the existence of a plurality of limit grooves 16 provides a plurality of gears for the rotation of the supporting member 2, and the limit column 101 can enter the limit groove 16 whenever the supporting member 2 rotates a certain angle.

[0052] An elastic member 19 acting on the limiting member 10 is also provided in the first slide groove 18. The elastic member 19 is configured to provide elastic force for the limiting member 10 to enter the limiting groove 16. The elastic member 19 is a spring. One end of the elastic member 19 is sleeved on the tail end of the limiting member 10, and the other end is against the groove wall of the limiting groove 16. The limiting member 10 may be separated from the first slide groove 18 under the action of the spring and the control member 15. Therefore, a pressing plate 20 is provided on the base 21. The pressing plate 20 is installed on the base 21 from top to bottom and limits the limiting member 10 in the first slide groove 18.

[0053] like Fig. 9 As shown, the base 21 is provided with a second slide groove 24 that penetrates the base 21 along its thickness direction beside the limit member 10, and the control member 15 is slidably arranged in the second slide groove 24 and protrudes from the bottom surface of the base 21 for the user to press; since the opening direction of the first slide groove 18 is along the length direction of the base 21, and the opening direction of the second slide groove 24 is along the thickness direction of the base 21, the sliding direction of the control member 15 and the limit member 10 are perpendicular. The control member 15 is arranged in this way for the convenience of user operation on the one hand, and for the reduction of the size of the base 21 and the reduction of production and transportation costs on the other hand; a guide rail 25 is also provided in the second slide groove 24, and the guide rail 25 is also arranged along the thickness direction of the base 21 for guiding the control member 15; a plurality of convex strips 26 are provided on the surface of the control member 15, and the convex strips 26 are also arranged along the thickness direction of the base 21 for reducing the friction between the control member 15 and the second slide groove 24, making the user's operation more labor-saving.

[0054] Further, if Figure 6 , 9As shown in Figures 10 and 10, the control member 15 is located beside the limiting member 10, and a first wedge block 27 protruding toward the control member 15 is provided at the rear of the limiting member 10, and a second wedge block 28 protruding toward the limiting member 10 is provided on the control member 15. The first wedge block 27 and the second wedge block 28 are in contact with each other, and when the control member 15 slides, the limiting member 10 is driven to slide by the first wedge block 27 and the second wedge block 28; the inclined surfaces of the first wedge block 27 and the second wedge block 28 cooperate so that the sliding directions of the control member 15 and the limiting member 10 can be kept vertical and can also interact with each other; correspondingly, an avoidance groove 29 is opened between the first slide groove 18 and the second slide groove 24, so that the first wedge block 27 can enter the second slide groove 24 and can fit with the second wedge block 28. In addition to avoiding the first wedge block 27, the avoidance groove 29 can also limit the moving distance of the limiting member 10 to prevent the limiting member 10 from excessive movement.

[0055] Embodiment 2: The difference between this embodiment and embodiment 1 is that the structures of the locking member 14 and the limiting member 10 in the base are different. Specifically:

[0056] like Figure 11-13 As shown, the limit member 10 includes a slide bar 30 engaged with the locking member 14 and a slide block 31 matched with the inclined surface of the control member 15, the slide bar 30 includes a clamping portion 301 located at the head, a buttress 302 connected to the clamping portion 301, and a main body 303 connected to the buttress 302, the clamping portion 301, the buttress 302 and the main body 303 are integrally formed, and the end of the main body 303 away from the buttress 302 is inserted into the slide block 31 and connected by screws; the cross-section of the clamping portion 301 is rectangular, the cross-sections of the buttress 302 and the main body 303 are circular, and the diameter of the buttress 302 is larger than the diameter of the main body 303, and the elastic member 19 is sleeved on the main body 303; the slide bar 30 is inserted in a mounting seat 32, and the slide block 31 is located on the side of the mounting seat 32 away from the locking member. The tail of the slide bar 30, that is, the end of the main body 303 away from the abutment 302, is exposed from the mounting seat 32 and inserted in the slider 31; the middle section of the first slide groove 18 forms a mounting groove 34 correspondingly, and the mounting seat 32 is installed in the mounting groove 34 by screws; the mounting seat 32 is provided with a guide groove 33 corresponding to the shape of the slide bar 30, the slide bar 30 is inserted in the guide groove 33 and can slide in the guide groove 33, the elastic member 19 is also located in the guide groove 33, and the two ends of the elastic member 19 are respectively abutted against the abutment 302 and the guide groove 33; during installation, the elastic member 19 can be first sleeved on the slide bar 30, the slide bar 30 is inserted into the mounting seat 32, and then the slide bar 30 is connected to the slider 31, and finally installed on the base 21 through the mounting seat 32. Therefore, it is only necessary to fix the mounting seat 32, and the installation operation is quick and convenient. Since the cross section of the clamping portion 301 is rectangular, the sliding rod 30 will not rotate relative to the mounting seat 32 after being inserted into the mounting seat 32 .

[0057] A latching tooth 35 is provided at the end of the limiting member, that is, the end of the engaging portion 301 away from the platform 302, and the latching tooth 35 is engaged with the limiting groove 16; the latching tooth 35 includes a sliding surface 36 and a stopping surface 37, and the sliding surface 36 is configured so that when the base 21 rotates in one direction, the latching tooth 35 slides on the locking member 14 through the inclined sliding surface 36 and switches between the limiting grooves 16; the stopping surface 37 is configured so that when the base 21 has a tendency to rotate in another direction, the stopping surface 37 prevents the latching tooth 35 from switching between the limiting grooves 16; the cooperation between the sliding surface 36 and the stopping surface 37 enables the base 21 to rotate upward and inward without obstacle, but cannot rotate downward and outward smoothly to support the human arm; and when the base 21 needs to rotate downward and outward, the latching tooth 35 can be disengaged from the limiting groove 16 through the control member to adjust the base 21.

[0058] The abutment platform 302 is provided with a convex strip 26 radially protruding from the abutment platform 302 , and the upper surface of the slider 31 is also provided with a convex strip 26 to reduce the contact area during contact sliding friction, thereby making the sliding smoother.

[0059] When the mounting seat 32 is installed in the base 21 by screws, the limiting member 10 will also remain thereon and will not be separated from the base 21 due to the elastic force of the elastic member 19 , so there is no need for the pressing plate 20 to press the limiting member 10 .

Claims

1. A locking structure for an inclined rotating handrail, characterized in that: include: An armrest seat having an inclined rotating surface; A base, which is arranged on the armrest seat and tilts and rotates on the rotating surface; A limiter is slidably arranged on the base and rotates synchronously with the base; The locking member is located in the base and fixed relative to the armrest seat, and the locking member is arranged obliquely along the rotating surface; the locking member is provided with a plurality of limiting grooves along the circumferential direction, and when the limiting member rotates with the base, the limiting member selectively enters different limiting grooves to lock the base; A control member configured to control the limiting member to leave or enter the limiting groove; The base includes a receiving groove, and the limiting member, the locking member and the control member are all arranged in the receiving groove; a rotating shaft is arranged on the armrest seat, and the rotating shaft is inserted on the base and enters the receiving groove, and the locking member is installed on the rotating shaft; The base is provided with a first slide groove arranged along the length direction of the base, and the limiting member is slidably arranged in the first slide groove.

2. The locking structure of the inclined rotating handrail according to claim 1, characterized in that: A pressing plate is arranged on the base, and the pressing plate is installed on the base from top to bottom and limits the limiting member in the first sliding groove.

3. The locking structure of the inclined rotating handrail according to claim 1, characterized in that: The cross section of the rotating shaft head is trapezoidal or rectangular, and the rotating shaft head is inserted into the locking piece.

4. The locking structure of the inclined rotating handrail according to claim 1, characterized in that: An installation groove is formed in the middle section of the first slide groove, and a mounting seat is arranged in the installation groove. The limiting member includes a sliding rod engaged with the locking member and a sliding block matched with the inclined surface of the control member; the sliding block is located on a side of the mounting seat away from the locking member, the sliding rod is inserted in the mounting seat, the tail of the sliding rod is exposed from the mounting seat and is connected to the sliding block by screws.

5. The locking structure of the inclined rotating handrail according to claim 4, characterized in that: The sliding rod includes a clamping part located at the head, a platform connected to the clamping part, and a main body connected to the platform. The clamping part, the platform and the main body are integrally formed; the cross-section of the clamping part is rectangular, the cross-section of the platform and the main body is circular, and the mounting seat is provided with a guide groove corresponding to the shape of the sliding rod.

6. The locking structure of the inclined rotating handrail according to claim 5, characterized in that: The diameter of the abutment is larger than the diameter of the main body. An elastic member acting on the limiting member is also provided in the first slide groove. The elastic member is sleeved on the main body and abuts against the abutment. The elastic member is configured to provide elastic force for the limiting member to enter the limiting groove. The elastic member is located in the guide groove of the mounting seat.

7. The locking structure of the inclined rotating handrail according to claim 1, characterized in that: A latching tooth is provided at the end of the limiting member, and the latching tooth is engaged with the limiting groove; the latching tooth includes a sliding surface and a stopping surface, and the sliding surface is configured so that when the base rotates in one direction, the latching tooth slides on the locking member through the inclined sliding surface and switches between the limiting grooves; the stopping surface is configured so that when the base has a tendency to rotate in another direction, the stopping surface prevents the latching tooth from switching between the limiting grooves.

8. The locking structure of the inclined rotating handrail according to claim 1, characterized in that: The control member is slidably arranged on the base along the thickness direction of the base, and the sliding directions of the control member and the limiting member are perpendicular; the control member is located beside the limiting member, and a first wedge block protruding toward the control member is provided at the tail of the limiting member, and a second wedge block protruding toward the limiting member is provided on the control member, the first wedge block and the second wedge block are abutted against each other, and when the control member slides, the limiting member is driven to slide by the first wedge block and the second wedge block; the base is provided with a second slide groove penetrating the base along the thickness direction thereof, and the control member is slidably arranged in the second slide groove and protrudes from the bottom surface of the base; a guide rail is provided in the second slide groove; and a convex strip is provided on the surface of the control member.

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