Seat arm rear rotation automatic locking mechanism and seat arm

Abstract

The utility model belongs to the technical field of seat armrest, specifically relates to a seat armrest is with back rotation automatic locking mechanism and seat armrest, and this new -type includes: the rotatory surface of connecting seat is equipped with at least two locking holes, and the inside of the rotatory seat rotationally connected with connecting seat is equipped with cylinder portion, and locking assembly, it includes: the spacing cap, first spring and locking pin that set in cylinder portion from left to right in proper order, wherein the both ends of first spring are respectively with spacing cap and locking pin abut, and the inner wall of cylinder portion is slidably connected with locking pin, this seat armrest is with back rotation automatic locking mechanism and seat armrest rotate through the rotatory seat relative to connecting seat, when the rotatory seat rotates to cylinder portion and any locking hole concentric, first spring deformation rebound pushes the locking pin and inserts into locking hole, to restrict the rotatory seat rotation, thereby makes seat armrest automatic stabilization in the angle, provides the support for the arm of user.

Description

Technical Field

[0001] This utility model belongs to the field of seat armrest technology, specifically relating to a rear-rotating automatic locking mechanism for seat armrests and a seat armrest. Background Technology

[0002] Modern ergonomic chairs, office chairs, and lounge chairs generally feature a reclining backrest to meet users' needs for rest and relaxation. However, when the backrest is reclined, the user's shoulder position shifts, causing the armrests, which provide adequate support when sitting upright, to fail to effectively support the arms when reclining. This results in the arms being suspended or in an uncomfortable position, significantly impacting the comfort of reclining and resting.

[0003] To address this issue, the industry has developed rear-rotating armrests. When the user leans back, the armrest can be pushed to rotate backward, following the position of the user's arms and providing continuous support. However, existing rear-rotating mechanisms of this type are typically movable and cannot be locked in a designated position. This results in the armrest not being stably fixed in one position during rear-rotation or after reaching a certain angle. When pressure is applied by the user's arms, the armrest may continue to rotate uncontrollably or wobble under external forces, failing to provide a firm and reliable sense of support. This unstable support experience may even cause users to feel insecure.

[0004] Therefore, in order to solve the above problems, it is necessary to design a rear-rotation automatic locking mechanism for seat armrests and a seat armrest. Utility Model Content

[0005] The purpose of this utility model is to provide a rear-rotating automatic locking mechanism for seat armrests and a seat armrest, so as to solve the technical problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a rear-rotation automatic locking mechanism for a seat armrest, comprising: The connector has at least two locking holes on its rotating surface; A rotating seat rotatably connected to a connecting seat has a cylindrical portion inside. The locking assembly includes, from left to right, a limiting cap, a first spring, and a locking pin, which are sequentially disposed within the cylindrical portion; wherein The two ends of the first spring abut against the limiting cap and the locking pin, respectively; and The locking pin is slidably connected to the inner wall of the cylindrical part; When the rotating seat rotates to the point where the cylindrical part is concentric with any of the locking holes, the first spring deforms and rebounds, pushing the locking pin into the locking hole to restrict the rotation of the rotating seat.

[0007] Furthermore, an unlocking cover is provided on the other side of the rotating base; wherein The unlocking cover is rotatably connected to the rotating base; The side of the unlocking cover is provided with an arc-shaped recess; wherein The bottom surface of the arc-shaped concave portion is inclined so that the depth of the arc-shaped concave portion gradually changes linearly along its extension direction; that is... The depth of the arc-shaped concave portion smoothly transitions from the shallowest point at one end to the deepest point at the other end. The inner wall of the cylindrical section has stepped holes; wherein The stepped hole consists of a first hole segment and a second hole segment; and The diameter of the first hole segment is larger than the diameter of the second hole segment; The end of the first hole segment and the beginning of the second hole segment form a stepped surface; The locking assembly further includes: a second spring sleeved on the locking pin; wherein One end of the second spring is connected to the locking pin, and the other end abuts against the stepped surface; The limiting cap is slidably connected to the first hole segment; The limiting cap contacts the arc-shaped concave portion; When locking is required, rotate the unlocking cover counterclockwise so that the arc-shaped concave part gradually changes from a deep part to a shallow part that contacts the limiting cap. The inclined surface of the arc-shaped concave part pushes the limiting cap to move within the first hole section. The limiting cap pushes the locking pin to slide within the cylindrical part until it abuts against the rotating surface of the connecting seat by compressing the first spring. The locking pin compresses the second spring to form a trigger state. When the rotating seat rotates to the point where the cylindrical part is concentric with any of the locking holes, the first spring deforms and rebounds, pushing the locking pin to automatically insert into the locking hole, and compressing the second spring again; When unlocking is required, rotate the unlocking cover clockwise so that the arc-shaped recess gradually changes from contacting the limit cap at a shallow depth to contacting the limit cap at a deep depth. The first spring deforms and rebounds to push the limit cap back to its original position, and the second spring deforms and rebounds to push the locking pin back to its original position, so that the locking pin retracts from the locking hole into the cylindrical part.

[0008] Furthermore, the locking pin includes: a cylindrical portion, a first spring protrusion disposed on one side of the cylindrical portion, and a pin portion disposed on the other side of the cylindrical portion; wherein The cylindrical portion is slidably connected to the first hole section; The pin is slidably connected to the second hole section; One end of the first spring is sleeved on the first spring protrusion and abuts against one side of the cylindrical part, while the other end abuts against the inner wall of the limiting cap; The second spring is sleeved on the pin, with its two ends abutting against the cylindrical part and the stepped surface, respectively.

[0009] Furthermore, the rotating surface of the connecting seat is provided with a positioning boss and two limiting ears; wherein The two limiting ears are disposed on both sides of the positioning boss; and The limiting ear is fitted with a positioning ball screw; One side of the rotating base is provided with a positioning boss receiving position and two limiting ear moving positions; wherein The two limiting ears are positioned on both sides of the positioning boss receiving position and are in communication with the positioning boss receiving position; and The limiting ear movement position is provided with several arc-shaped bead receiving positions; The positioning boss is rotatably connected to the positioning boss receiving position. When the two limiting ears move within the corresponding limiting ear moving position, the positioning ball screws move sequentially to the ball receiving position.

[0010] Furthermore, a rotating boss is provided on the side of the positioning boss; The rotating base has a rotating boss receiving position in the middle; wherein The rotating boss receiving position is connected to the positioning boss receiving position; The rotating boss is rotatably connected to the rotating boss receiving position.

[0011] Furthermore, the side of the rotating seat is provided with a space for placing wear-resistant plates; wherein The wear-resistant sheet placement position is connected to the rotating boss receiving position; The wear-resistant sheet placement position is provided with a wear-resistant sheet; The rotating boss is provided with a screw on its side; The screw is adapted to pass through the positioning boss receiving position, the rotating boss receiving position, and the wear-resistant plate; The screw is fitted with two U-shaped springs, an anti-rotation washer, and an anti-loosening nut from right to left; wherein... The anti-loosening nut is threadedly connected to the screw to connect the connecting seat and the rotating seat.

[0012] Furthermore, a nut receiving portion is provided on one side of the unlocking cover; wherein The screw end, anti-loosening nut, anti-rotation washer, and two U-shaped springs are located inside the nut receiving part.

[0013] Furthermore, the side of the unlocking cover is provided with an irregularly shaped recess; The irregularly shaped recess is provided with bolt clearance holes; wherein The bolt clearance hole is connected to the nut receiving part; A bolt is placed inside the irregularly shaped recess; The screw has a threaded hole in the middle; The shank of the bolt is adapted to pass through the bolt clearance hole and then be threaded into the threaded hole to connect the unlocking cover with the rotating seat.

[0014] Furthermore, the unlocking cover is provided with at least two insertion holes; A decorative cover is movably connected to the side of the unlocking cover; wherein The decorative cover has an irregularly shaped frame and at least two insertion posts on one side; and The irregularly shaped frame portion is adapted to be inserted into the irregularly shaped recess; Each of the aforementioned plug pins is adapted to be inserted into the corresponding plug hole.

[0015] On the other hand, this utility model also provides a seat armrest, including: The armrest, the rotating arm rotatably connected to the armrest, the telescopic arm rotatably connected to the rotating arm, and the rear-rotating automatic locking mechanism for the seat armrest; wherein The telescopic arm includes: a telescopic outer cylinder rotatably connected to the rotating arm and a telescopic inner cylinder connected to the rotating seat; and The connecting seat is adapted to be connected to the seat frame.

[0016] The beneficial effects of this utility model are: (I) When the user pushes the armrest of the seat, the rotating seat rotates relative to the connecting seat. During the rotation, the locking pin is blocked by the rotating surface of the connecting seat, and the compressed first spring cannot push the locking pin. When the rotating seat rotates to the point where the cylindrical part is concentric with any locking hole, the locking pin is no longer blocked, the first spring deforms and rebounds, pushing the locking pin into the corresponding locking hole. At this time, the locking pin and the locking hole cooperate to restrict the rotation of the rotating seat relative to the connecting seat, so that the armrest of the seat is automatically stabilized at this angle, providing support for the user's arm.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1Explosion of the preferred embodiment of this utility model Figure 1 ; Figure 2 Explosion of the preferred embodiment of this utility model Figure 2 ; Figure 3 This is a cross-sectional perspective view of a preferred embodiment of the present invention. Figure 4 This is a perspective view of a preferred embodiment of the locking component of this utility model; Figure 5 This is a cross-sectional view of a preferred embodiment of the present invention. Figure 6 This is a perspective view of a preferred embodiment of the connector of this utility model; Figure 7 Explosion of the preferred embodiment of this utility model Figure 3 ; Figure 8 Explosion of the preferred embodiment of this utility model Figure 4 ; Figure 9 Explosion of the preferred embodiment of this utility model Figure 5 ; Figure 10 Explosion of the preferred embodiment of this utility model Figure 6 ; Figure 11 This is a three-dimensional representation of a preferred embodiment of the seat armrest of this utility model. Figure 1 ; Figure 12 This is a three-dimensional representation of a preferred embodiment of the seat armrest of this utility model. Figure 2 .

[0021] In the picture: Connector 1, locking hole 101, positioning boss 102, limiting ear 103, rotating boss 104; Rotating seat 2, cylindrical part 201, first hole section 2011, second hole section 2012, stepped surface 2013, positioning boss receiving position 202, limiting ear moving position 203, ball receiving position 204, rotating boss receiving position 205, wear-resistant plate placement position 206; Locking component 3, limit cap 301, first spring 302, locking pin 303, cylindrical part 3031, first spring protrusion 3032, pin part 3033, second spring 304; Unlock cover 4, arc-shaped recess 401, nut receiving part 402, irregular recess 403, bolt clearance hole 404, insertion hole 405; Positioning ball screw 5, wear-resistant plate 6, screw 7, threaded hole 701; 8. U-shaped spring sheet; 9. Anti-rotation washer; 10. Anti-loosening nut; 11. Bolt; Decorative cover 12, irregular frame 1201, plug-in post 1202; 13. Handrail board, 14. Rotating arm, 15. Telescopic arm, 1501. Telescopic outer cylinder, 1502. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example 1

[0023] like Figures 1 to 10 As shown, this embodiment provides a rear-rotation automatic locking mechanism for a seat armrest, including: The connecting seat 1 has at least two locking holes 101 on its rotating surface; the rotating seat 2, which is rotatably connected to the connecting seat 1, has a cylindrical portion 201 inside; the locking assembly 3 includes: a limiting cap 301, a first spring 302, and a locking pin 303 arranged sequentially from left to right inside the cylindrical portion 201; wherein the two ends of the first spring 302 abut against the limiting cap 301 and the locking pin 303 respectively; and the locking pin 303 is slidably connected to the inner wall of the cylindrical portion 201; when the rotating seat 2 rotates to the point where the cylindrical portion 201 is concentric with any of the locking holes 101, the first spring 302 deforms and rebounds to push the locking pin 303 into the locking hole 101 to limit the rotation of the rotating seat 2; wherein the connecting seat 1 has at least two locking holes 101 on its rotating surface to provide a locking basis for the rotating seat 2 at different angles; wherein the rotating seat 1 is rotatably connected to the connecting seat 1 to adjust the angle of the armrest of the seat to adapt to the change in the position of the user's arms when leaning back.

[0024] In this embodiment, when the user pushes the armrest of the seat, the rotating seat 2 rotates relative to the connecting seat 1. During the rotation, the locking pin 303 is blocked by the rotating surface of the connecting seat 1, and the compressed first spring 302 cannot push the locking pin 303. When the rotating seat 2 rotates to the point where the cylindrical part 201 is concentric with any locking hole 101, the locking pin 303 is no longer blocked, the first spring 302 deforms and rebounds, pushing the locking pin 303 into the corresponding locking hole 101. At this time, the locking pin 303 cooperates with the locking hole 101, restricting the rotation of the rotating seat 2 relative to the connecting seat 1, thereby automatically stabilizing the armrest at this angle and providing support for the user's arm.

[0025] The other side of the rotating seat 2 is provided with an unlocking cover 4; wherein the unlocking cover 4 is rotatably connected to the rotating seat 2; the side of the unlocking cover 4 is provided with an arc-shaped recess 401; wherein the bottom surface of the arc-shaped recess 401 is inclined so that the depth of the arc-shaped recess 401 gradually changes linearly along its extension direction; that is, the depth of the arc-shaped recess 401 smoothly transitions from the shallowest point at one end to the deepest point at the other end; the inner wall of the cylindrical part 201 is a stepped hole; wherein the stepped hole is composed of a first hole segment 2011 and a second hole segment 2012; and the diameter of the first hole segment 2011 is larger than the diameter of the second hole segment 2012; the end of the first hole segment 2011 and the beginning of the second hole segment 2012 form a step. Surface 2013; The locking assembly 3 further includes: a second spring 304 sleeved on the locking pin 303; wherein one end of the second spring 304 is connected to the locking pin 303, and the other end abuts against the stepped surface 2013; the limiting cap 301 is slidably connected to the first hole section 2011; the limiting cap 301 contacts the arc-shaped recess 401; when locking is required, the unlocking cover 4 is rotated counterclockwise so that the arc-shaped recess 401 gradually changes from a deep contact with the limiting cap 301 to a shallow contact with the limiting cap 301, the inclined surface of the arc-shaped recess 401 pushes the limiting cap 301 to move within the first hole section 2011, and the limiting cap 301 pushes the locking pin 303 in the cylindrical part 2 by compressing the first spring 302. When the rotating seat 2 slides into the cylinder 201 and abuts against the rotating surface of the connecting seat 1, the locking pin 303 compresses the second spring 304, forming a trigger state. When the rotating seat 2 rotates to the point where the cylindrical part 201 is concentric with any locking hole 101, the first spring 302 deforms and rebounds, pushing the locking pin 303 to automatically insert into the locking hole 101, and compressing the second spring 304 again. When unlocking is required, the unlocking cover 4 is rotated clockwise so that the arc-shaped recess 401 gradually changes from contacting the limit cap 301 at a shallow depth to contacting the limit cap 301 at a deep depth. The first spring 302 deforms and rebounds, pushing the limit cap 301 to reset, and the second spring 304 deforms and rebounds, pushing the locking pin 303 to reset, so that the locking pin 303 retracts from the locking hole 101. Inside the cylindrical section 201; an arc-shaped recess 401 is provided on the unlocking cover 4, and the bottom surface of the arc-shaped recess 401 is inclined so that the depth of the arc-shaped recess 401 gradually changes linearly along its extension direction. This allows the locking component 3 to be precisely controlled by rotating the unlocking cover 4. The user can precisely trigger the locking or unlocking operation as needed, avoiding instability caused by improper operation and improving the accuracy and controllability of the operation. A second spring 304 is provided. During the locking process, when the locking pin 303 is pushed, the second spring 304 is compressed, which plays a role in energy storage. During unlocking, the second spring 304 deforms and rebounds, helping the locking pin 303 to reset, ensuring the smooth progress of locking and unlocking actions.By providing a stepped hole on the inner wall of the cylindrical portion 201, space is provided for the installation and positioning of the second spring 304. Simultaneously, the stepped surface 2013 abuts against the second spring 304, ensuring that the second spring 304 can be compressed and deformed to rebound.

[0026] The locking pin 303 includes: a cylindrical portion 3031, a first spring protrusion 3032 disposed on one side of the cylindrical portion 3031, and a pin portion 3033 disposed on the other side of the cylindrical portion 3031; wherein the cylindrical portion 3031 is slidably connected to the first hole segment 2011; the pin portion 3033 is slidably connected to the second hole segment 2012; one end of the first spring 302 is sleeved on the first spring protrusion 3032 and abuts against one side of the cylindrical portion 3031, and the other end abuts against the inner wall of the limiting cap 301; the second spring 304 is sleeved on... On the pin 3033, both ends abut against the cylindrical part 3031 and the stepped surface 2013 respectively; by providing the first spring protrusion 3032, a stable sleeve position is provided for the first spring 302. One end of the first spring 302 is sleeved on the first spring protrusion 3032 and abuts against one side of the cylindrical part 3031 to ensure that the first spring 302 will not deviate during operation and can accurately transmit the elastic force; by providing the pin 3033, it is inserted into the locking hole 101 on the connecting seat 1 when locking to realize the locking of the seat armrest.

[0027] The rotating surface of the connecting seat 1 is provided with a positioning boss 102 and two limiting ears 103; wherein the two limiting ears 103 are located on both sides of the positioning boss 102; and a positioning ball screw 5 is embedded in the limiting ear 103; one side of the rotating seat 2 is provided with a positioning boss receiving position 202 and two limiting ear moving positions 203; wherein the two limiting ear moving positions 203 are located on both sides of the positioning boss receiving position 202 and communicate with the positioning boss receiving position 202; and a plurality of arc-shaped ball screws are provided in the limiting ear moving positions 203. The positioning boss 102 is rotatably connected to the positioning boss receiving position 202; when the two limiting ears 103 move within their respective limiting ear moving positions 203, the positioning ball screws 5 move sequentially into the ball receiving position 204; wherein the rotatable connection between the positioning boss 102 and the positioning boss receiving position 202 provides a central axis for the rotation of the rotating seat 2 relative to the connecting seat 1, so that the rotating seat 2 can rotate stably and smoothly around the axis of the positioning boss 102, ensuring the stability of the seat armrest during angle adjustment and avoiding rotation. The wobbling and offset during rotation provide users with a stable and reliable operating experience. By setting the limiting ear 103 and the limiting ear movement position 203, the rotation range of the rotating seat 2 relative to the connecting seat 1 is limited, thereby achieving precise adjustment of the seat armrest angle. Specifically, by setting the positioning ball screw 5 and the ball receiving position 204, when the limiting ear 103 moves within the limiting ear movement position 203, the positioning ball screw 5 moves sequentially into the ball receiving position 204, realizing the positioning of the seat armrest at different angles. Each ball receiving position 204 corresponds to one... The specific angle of the seat armrest allows the armrest to be fixed at a specific angle when the positioning ball screw 5 falls into a ball receiving position 204, providing the user with a clear angle positioning. At the same time, the cooperation between the positioning ball screw 5 and the ball receiving position 204 can also provide the user with operational feedback. When the user rotates the seat armrest, they will feel a slight sticking and "click" sound when the positioning ball screw 5 falls into the ball receiving position 204. This feedback allows the user to clearly know that the seat armrest has reached the preset angle position, improving the accuracy and convenience of operation.

[0028] The positioning boss 102 has a rotating boss 104 on its side; the rotating seat 2 has a rotating boss receiving position 205 in its middle; the rotating boss receiving position 205 is connected to the positioning boss receiving position 202; the rotating boss 104 is rotatably connected to the rotating boss receiving position 205; by setting the rotating boss 104 and the rotating boss receiving position 205 rotatably connected on the basis of the positioning boss 102 and the positioning boss receiving position 202, the force is distributed and the stability of the center positioning is enhanced. The positioning boss 102 and the positioning boss receiving position 202 constitute the main rotation axis positioning, while the rotating boss 104 and the rotating boss receiving position 205 serve as auxiliary rotation support points. The two work together to make the rotation of the rotating seat 2 relative to the connecting seat 1 more stable.

[0029] The rotating seat 2 has a wear-resistant plate placement position 206 on its side; the wear-resistant plate placement position 206 communicates with the rotating boss receiving position 205; the wear-resistant plate 6 is provided in the wear-resistant plate placement position 206; the rotating boss 104 has a screw 7 on its side; the screw 7 is adapted to pass through the positioning boss receiving position 202, the rotating boss receiving position 205 and the wear-resistant plate 6; two U-shaped spring pieces 8, an anti-rotation washer 9 and an anti-loosening nut 10 are sequentially sleeved on the screw 7 from right to left; the anti-loosening nut 10 is threadedly connected to the screw 7 to connect the connecting seat 1 and the rotating seat 2; one of the U-shaped spring pieces 8 contacts the wear-resistant plate 6 to effectively reduce the wear of the U-shaped spring piece 8 directly on the rotating seat 2, thereby extending the service life of the rotating seat 2; wherein the... The screw 7 passes through the positioning boss receiving position 202, the rotating boss receiving position 205, and the wear-resistant plate 6, serving to connect the connecting seat 1 and the rotating seat 2. It also provides precise positioning for the entire rotating structure, ensuring the relative position of the connecting seat 1 and the rotating seat 2 is stable during rotation, avoiding rotational instability caused by loosening. Two U-shaped springs 8 are provided to provide a certain elastic preload, maintaining appropriate pressure between the connecting seat 1 and the rotating seat 2, reducing the gap between them, and further improving the smoothness and stability of rotation. An anti-rotation washer 9 and a lock nut 10 are provided. Tightening the lock nut 10 into contact with the anti-rotation washer 9 ensures that the connecting seat 1 and the rotating seat 2 are firmly connected.

[0030] The unlocking cover 4 has a nut receiving portion 402 on one side; wherein the end of the screw 7, the anti-loosening nut 10, the anti-rotation washer 9 and the two U-shaped spring pieces 8 are located in the nut receiving portion 402; wherein by setting the nut receiving portion 402, the end of the screw 7, the anti-loosening nut 10, the anti-rotation washer 9 and the two U-shaped spring pieces 8 are avoided, and the unlocking cover 4 is prevented from causing interference.

[0031] The unlocking cover 4 has a shaped recess 403 on its side; the shaped recess 403 has a bolt clearance hole 404; the bolt clearance hole 404 communicates with the nut receiving part 402; a bolt 11 is placed in the shaped recess 403; the middle part of the screw 7 has a threaded hole 701; the shank of the bolt 11 is adapted to pass through the bolt clearance hole 404 and be threaded into the threaded hole 701 so that the unlocking cover 4 is connected to the rotating seat 2; by setting the bolt clearance hole 404, the shank of the bolt 11 is cleared; by tightening the bolt 11, the unlocking cover 4 is firmly fixed on the rotating seat 2, ensuring that the unlocking cover 4 will not loosen or fall off during use.

[0032] The unlocking cover 4 is provided with at least two insertion holes 405; a decorative cover 12 is movably connected to the side of the unlocking cover 4; wherein one side of the decorative cover 12 is provided with an irregular frame portion 1201 and at least two insertion posts 1202; and the irregular frame portion 1201 is adapted to be inserted into the irregular recess 403; each of the insertion posts 1202 is adapted to be inserted into the corresponding insertion hole 405; by setting the decorative cover 12 to cover and beautify the side of the unlocking cover 4, the head of the bolt 11 is concealed, making the appearance of the seat armrest more concise and uniform; wherein the fit between the irregular frame portion 1201 and the irregular recess 403 and the insertion of the insertion posts 1202 and the insertion holes 405 make the connection structure between the decorative cover 12 and the unlocking cover 4 a hidden connection, improving the overall aesthetics of the product and enhancing the market competitiveness of the product. Example 2

[0033] like Figures 10 to 12 As shown, this embodiment also provides a seat armrest, including: The armrest 13, the rotating arm 14 rotatably connected to the armrest 13, the telescopic arm 15 rotatably connected to the rotating arm 14, and the automatic locking mechanism for the seat armrest; wherein the telescopic arm 15 includes: a telescopic outer cylinder 1501 rotatably connected to the rotating arm 14 and a telescopic inner cylinder 1502 connected to the rotating seat 2; and the connecting seat 1 is adapted to be connected to the seat frame; wherein the telescopic inner cylinder 1502 is integrally formed with the rotating seat 2.

[0034] For the specific structure and implementation process of the automatic locking mechanism for the rear rotation of the seat armrest, please refer to the relevant discussion in Example 1, which will not be repeated here.

[0035] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0036] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A rear-rotation automatic locking mechanism for a seat armrest, characterized in that, include: The connecting seat (1) has at least two locking holes (101) on its rotating surface. A rotating seat (2) rotatably connected to the connecting seat (1) has a cylindrical part (201) inside. The locking assembly (3) includes: a limiting cap (301), a first spring (302), and a locking pin (303) arranged sequentially from left to right within the cylindrical portion (201); wherein The two ends of the first spring (302) abut against the limiting cap (301) and the locking pin (303) respectively; and The locking pin (303) is slidably connected to the inner wall of the cylindrical part (201); When the rotating seat (2) rotates to the point where the cylindrical part (201) is concentric with any of the locking holes (101), the first spring (302) deforms and rebounds to push the locking pin (303) into the locking hole (101) to restrict the rotation of the rotating seat (2).

2. The automatic locking mechanism for seat armrests as described in claim 1, characterized in that, The other side of the rotating base (2) is provided with an unlocking cover (4); wherein The unlocking cover (4) is rotatably connected to the rotating seat (2); The side of the unlocking cover (4) is provided with an arc-shaped recess (401); wherein The bottom surface of the arc-shaped recess (401) is inclined so that the depth of the arc-shaped recess (401) gradually changes linearly along its extension direction; that is... The depth of the arc-shaped recess (401) smoothly transitions from the shallowest point at one end to the deepest point at the other end; The inner wall of the cylindrical portion (201) has stepped holes; wherein The stepped hole consists of a first hole segment (2011) and a second hole segment (2012); and The diameter of the first hole segment (2011) is larger than the diameter of the second hole segment (2012); The end of the first hole segment (2011) and the beginning of the second hole segment (2012) form a stepped surface (2013). The locking assembly (3) further includes: a second spring (304) sleeved on the locking pin (303); wherein One end of the second spring (304) is connected to the locking pin (303), and the other end abuts against the stepped surface (2013); The limiting cap (301) is slidably connected to the first hole segment (2011); The limiting cap (301) contacts the arc-shaped recess (401); When locking is required, the unlocking cover (4) is rotated counterclockwise so that the arc-shaped recess (401) gradually changes from contact with the limiting cap (301) from a deep part to a shallow part. The inclined surface of the arc-shaped recess (401) pushes the limiting cap (301) to move within the first hole section (2011). The limiting cap (301) pushes the locking pin (303) to slide within the cylindrical part (201) to abut against the rotating surface of the connecting seat (1) by compressing the first spring (302). The locking pin (303) compresses the second spring (304) to form a trigger state. When the rotating seat (2) rotates to the point where the cylindrical part (201) is concentric with any locking hole (101), the first spring (302) deforms and rebounds, pushing the locking pin (303) to automatically insert into the locking hole (101), and compressing the second spring (304) again. When unlocking is required, the unlocking cover (4) is rotated clockwise so that the arc-shaped recess (401) gradually changes from contact with the limit cap (301) from a shallow position to a deep position. The first spring (302) deforms and rebounds to push the limit cap (301) back to its original position, and the second spring (304) deforms and rebounds to push the locking pin (303) back to its original position, so that the locking pin (303) retracts from the locking hole (101) into the cylindrical part (201).

3. The automatic locking mechanism for seat armrests as described in claim 2, characterized in that, The locking pin (303) includes: a cylindrical portion (3031), a first spring protrusion (3032) disposed on one side of the cylindrical portion (3031), and a pin portion (3033) disposed on the other side of the cylindrical portion (3031); wherein The cylindrical portion (3031) is slidably connected to the first hole section (2011); The pin (3033) is slidably connected to the second hole section (2012); One end of the first spring (302) is sleeved on the first spring protrusion (3032) and abuts against one side of the cylindrical part (3031), while the other end abuts against the inner wall of the limiting cap (301); The second spring (304) is sleeved on the pin (3033), with its two ends abutting against the cylindrical part (3031) and the stepped surface (2013) respectively.

4. The automatic locking mechanism for seat armrests as described in claim 3, characterized in that, The rotating surface of the connecting seat (1) is provided with a positioning boss (102) and two limiting ears (103); wherein The two limiting ears (103) are disposed on both sides of the positioning boss (102); and The limiting ear (103) is fitted with a positioning ball screw (5); The rotating base (2) is provided with a positioning boss receiving position (202) and two limiting ear moving positions (203) on one side; wherein The two limiting ear moving positions (203) are disposed on both sides of the positioning boss receiving position (202) and are in communication with the positioning boss receiving position (202); and The limiting ear movement position (203) is provided with several arc-shaped bead receiving positions (204). The positioning boss (102) is rotatably connected to the positioning boss receiving position (202); When the two limiting ears (103) are moved within the corresponding limiting ear moving position (203), the positioning ball screw (5) moves sequentially into the ball receiving position (204).

5. The automatic locking mechanism for seat armrests as described in claim 4, characterized in that, The side of the positioning boss (102) is provided with a rotating boss (104). The rotating base (2) is provided with a rotating boss receiving position (205) in the middle; wherein The rotating boss receiving position (205) is connected to the positioning boss receiving position (202); The rotating boss (104) is rotatably connected to the rotating boss receiving position (205).

6. The automatic locking mechanism for a seat armrest by rotation as described in claim 5, characterized in that, The side of the rotating seat (2) is provided with a wear-resistant plate placement position (206); wherein The wear-resistant sheet placement position (206) is connected to the rotating boss receiving position (205); The wear-resistant sheet placement position (206) is provided with a wear-resistant sheet (6); The rotating boss (104) has a screw (7) on its side. The screw (7) is adapted to pass through the positioning boss receiving position (202), the rotating boss receiving position (205) and the wear-resistant plate (6). The screw (7) is fitted with two U-shaped springs (8), an anti-rotation washer (9), and an anti-loosening nut (10) from right to left; wherein The anti-loosening nut (10) is threadedly connected to the screw (7) so that the connecting seat (1) and the rotating seat (2) are connected.

7. The automatic rear-rotation locking mechanism for seat armrests as described in claim 6, characterized in that, The unlocking cover (4) has a nut receiving part (402) on one side; wherein The end of the screw (7), the anti-loosening nut (10), the anti-rotation washer (9) and the two U-shaped springs (8) are located inside the nut receiving part (402).

8. The automatic locking mechanism for a seat armrest by rotation as described in claim 7, characterized in that, The side of the unlocking cover (4) is provided with an irregularly shaped recess (403). The irregularly shaped recess (403) is provided with a bolt clearance hole (404); wherein The bolt clearance hole (404) is connected to the nut receiving part (402); A bolt (11) is placed inside the irregular recess (403); The screw (7) has a threaded hole (701) in the middle. The shank of the bolt (11) is adapted to pass through the bolt clearance hole (404) and be threaded into the threaded hole (701) so that the unlocking cover (4) is connected to the rotating seat (2).

9. The automatic locking mechanism for a seat armrest by rear rotation as described in claim 8, characterized in that, The unlocking cover (4) is provided with at least two insertion holes (405). A decorative cover (12) is movably connected to the side of the unlocking cover (4); wherein The decorative cover (12) has an irregularly shaped frame (1201) and at least two insertion posts (1202) on one side; and The irregular frame portion (1201) is adapted to be inserted into the irregular recess portion (403); Each of the aforementioned plug posts (1202) is adapted to be inserted into the corresponding plug hole (405).

10. A type of armrest for a seat, characterized in that, include: Armrest (13), rotating arm (14) rotatably connected to armrest (13), telescopic arm (15) rotatably connected to rotating arm (14), and rear-rotating automatic locking mechanism for seat armrest as described in any one of claims 1-9; in The telescopic arm (15) includes: a telescopic outer cylinder (1501) rotatably connected to the rotating arm (14) and a telescopic inner cylinder (1502) connected to the rotating seat (2). as well as The connecting seat (1) is adapted to be connected to the seat frame.

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