Seat armrest lifting adjusting mechanism

Abstract

The utility model relates to the technical field of seat armrests, and discloses a seat armrest lifting adjusting mechanism which comprises a fixing pipe and a lifting rod, a ratchet bar is arranged on the inner wall of the right side of the fixing pipe, a plurality of ratchet grooves are formed in the left side of the ratchet bar, an unlocking groove is formed in the inner wall of the front side of the fixing pipe, and the lifting rod is inserted into the fixing pipe. A mounting groove is formed in the front side of the lifting rod, a positioning column, a movable groove hole, a locking groove hole and a locking block are arranged in the mounting groove, the movable groove hole is formed around the axis of the positioning column, the locking groove hole is formed in the vertical direction, the top end of the locking groove hole communicates with the left end of the movable groove hole, and a linear groove hole and a locking column are arranged on the rear side of the locking block; the positioning column is inserted into the linear groove hole in a penetrating mode, the locking column can be inserted into the movable groove hole in a sliding mode, the left side of the locking block is connected with the left side of the installation groove through a spring, the right side of the locking block is matched with the ratchet groove, and an unlocking column is arranged on the front side of the locking block and extends into the unlocking groove. The device is stable in structure and easy and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of seat armrests, in particular to a seat armrest lifting and lowering adjustment mechanism. Background Art

[0002] Armrests are generally installed on both sides of the seat. The seat armrest is an important part of the seat design, which provides additional support and comfort for users. With the development of society, people have higher and higher requirements for the comfort of armrests, so the armrests have gradually developed from the original mechanical fixed type to the adjustable type. The existing seat armrests are generally equipped with a lifting adjustment mechanism to achieve the lifting and adjustment of the armrest board. However, the lifting and adjustment structure of the existing seat armrests generally requires people to press the unlock button before the armrest board can be lifted and adjusted, which is inconvenient to operate and the structural stability is poor. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a seat armrest lifting and adjusting mechanism which is easy to operate and has a stable structure.

[0004] In order to solve the above technical problems, the utility model provides a seat armrest lifting adjustment mechanism, including a fixing tube and a lifting rod.

[0005] A ratchet bar is provided on the right inner wall of the fixing tube, and the ratchet bar is allowed to move in a direction from bottom to top. A plurality of ratchet grooves arranged vertically are provided on the left side of the ratchet bar, and an unlocking groove is provided on the front inner wall of the fixing tube.

[0006] The lifting rod can be inserted into the fixing tube in a vertical sliding manner, a mounting groove is provided on the front side of the lifting rod, the right side of the mounting groove is an opening, a positioning column, a movable slot hole, a locking slot hole and a locking block are provided in the mounting groove, the movable slot hole is arranged around the axis of the positioning column, the locking slot hole is arranged vertically, and the top end of the locking slot hole is connected to the end of the movable slot hole away from the opening,

[0007] A linear slot and a locking column are provided on the rear side of the locking block, the positioning column is inserted into the linear slot, the positioning column and the linear slot are rotatably and slidably connected, the locking column can be slidably inserted into the movable slot, the left side of the locking block is connected to the left side of the mounting groove through a spring, and a ratchet block extending out of the opening is provided on the right side of the locking block, and the ratchet block cooperates with the ratchet groove.

[0008] An unlocking column is provided on the front side of the locking block, and the unlocking column can be movably extended into the unlocking groove. When the unlocking column moves up to abut against the top of the unlocking groove, the ratchet block is separated from the ratchet groove, the linear slot is vertically arranged, and the locking column is located at the end of the movable slot away from the opening.

[0009] As a preferred solution of the utility model, the top of the ratchet groove is provided with a first inclined surface which gradually inclines to the right from top to bottom, the bottom end of the ratchet groove is provided with a horizontally arranged first plane, and the ratchet block is provided with a second inclined surface which cooperates with the first inclined surface and a second plane which cooperates with the first plane.

[0010] As a preferred solution of the utility model, a guiding slope is provided at the top of the unlocking groove, and the guiding slope gradually tilts toward the left side from bottom to top, and a limiting step is provided at the left bottom end of the unlocking groove.

[0011] As a preferred solution of the utility model, a limiting groove arranged vertically is provided on the rear inner wall of the fixed tube, and a limiting block is provided on the rear side of the lifting rod, and the limiting block is slidably connected to the limiting groove.

[0012] The utility model provides a seat armrest lifting and adjusting mechanism. Compared with the prior art, the utility model has the following beneficial effects: in a normal state, the ratchet block extends out of the opening and cooperates with the ratchet groove. Since the ratchet bar allows movement from bottom to top, the lifting rod and the locking block cannot be lowered under the restriction of the ratchet groove, which helps the lifting rod to remain in a predetermined position and has a stable structure; when the lifting rod needs to be raised and adjusted, the lifting rod is lifted upward, at which time the ratchet block gradually rises and gradually disengages from the ratchet groove. When the ratchet block rises to a position corresponding to the position of the previous ratchet groove, the ratchet block returns to a normal state under the action of a spring, that is, the lifting and lowering rod can be directly lifted to achieve the lifting and adjustment of the lifting rod, and the operation is simple; when the lifting rod rises to a position where the ratchet block cooperates with the uppermost ratchet groove, when it needs to be reset, the lifting and lowering rod is first lifted until the locking block is locked, and then the lifting rod is pressed downward until the locking block is unlocked. Thereafter, when the position of the tooth groove corresponds to the position of the lowermost ratchet groove, the locking block will return to a normal state under the action of the spring, and the lifting rod and the locking block will be reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of a chair armrest of the utility model;

[0014] Figure 2 It is a front side broken structure diagram of the utility model when it is in the initial normal state;

[0015] Figure 3 This is another front side broken structure diagram of the utility model when it is in the initial normal state;

[0016] Figure 4 It is a rear view structural diagram of the utility model when it is in an initial normal state;

[0017] Figure 5 yes Figure 4 The fracture structure diagram of

[0018] Figure 6 It is a structural diagram of the lifting rod of the utility model;

[0019] Figure 7 It is a rear view structural diagram of the front inner wall of the fixed tube of the utility model;

[0020] Figure 8 It is a structural diagram of the locking block of the utility model;

[0021] Fig. 9 It is a front side structural sectional view when the unlocking post of the utility model abuts against the top end of the unlocking slot and the locking post is locked;

[0022] Fig.10 It is another front side structural broken view when the unlocking post of the utility model abuts against the top end of the unlocking groove and the locking post is locked;

[0023] Fig.11 It is a rear view structural diagram of the present invention when the unlocking post abuts against the top end of the unlocking slot and the locking post is locked;

[0024] Fig.12 yes Fig.11 The fracture structure diagram of

[0025] Fig.13 It is a front side structural broken diagram of the utility model when the unlocking column and the limiting step are abutted and the locking column is unlocked;

[0026] Fig.14 It is another front side structural broken view of the utility model when the unlocking column and the limiting step are abutted and the locking column is unlocked;

[0027] Fig.15 It is a rear structural diagram of the utility model when the unlocking column and the limiting step are abutted and the locking column is unlocked;

[0028] Fig.16 yes Fig.15 The broken diagram;

[0029] In the figure, 1, fixed tube; 11, ratchet bar; 111, ratchet groove; 112, first inclined surface; 113, first plane; 12, unlocking groove; 121, guide inclined surface; 122, limiting step; 13, limiting groove; 2, lifting rod; 21, installation groove; 211, opening; 22, positioning column; 23, movable slot; 24, locking slot; 25, locking block; 251, ratchet block; 252, linear slot; 253, locking column; 254, unlocking column; 255, second inclined surface; 256, second plane; 26, spring; 27, limiting block. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance, among which, Figure 9-16 The spring is omitted.

[0032] like Figure 1-16 As shown, a seat armrest lifting and adjusting mechanism according to a preferred embodiment of the utility model comprises a fixing tube 1 and a lifting rod 2.

[0033] A ratchet bar 11 is provided on the right inner wall of the fixed tube 1. The ratchet bar 11 allows movement from bottom to top. A plurality of ratchet grooves 111 arranged vertically are provided on the left side of the ratchet bar 11. An unlocking groove 12 is provided on the front inner wall of the fixed tube 1.

[0034] The lifting rod 2 can be inserted into the fixed pipe 1 in a vertically slidable manner. A mounting groove 21 is provided on the front side of the lifting rod 2. The right side of the mounting groove 21 is an opening 211. A positioning column 22, a movable slot 23, a locking slot 24 and a locking block 25 are provided in the mounting groove 21. The movable slot 23 is arranged around the axis of the positioning column 22. The locking slot 24 is arranged vertically. The top end of the locking slot 24 is connected to the end of the movable slot 23 away from the opening 211.

[0035] A linear slot 252 and a locking column 253 are provided on the rear side of the locking block 25. The positioning column 22 is inserted into the linear slot 252. The positioning column 22 and the linear slot 252 are connected in rotation and sliding manner, that is, the locking block 25 can rotate around the axis of the positioning column 22, and the positioning column 22 can slide relatively along the direction of the linear slot 252. The locking column 253 can be slidably inserted into the movable slot 23. The left side of the locking block 25 is connected to the left side of the installation groove 21 through the spring 26. The right side of the locking block 25 is provided with a ratchet block 251 extending out of the opening 211. The ratchet block 251 cooperates with the ratchet groove 111.

[0036] An unlocking column 254 is provided on the front side of the locking block 25, and the unlocking column 254 can be movably extended into the unlocking slot 12. When the unlocking column 254 moves up to abut against the top of the unlocking slot 12, the ratchet block 251 is separated from the ratchet slot 111, the linear slot 252 is vertically arranged, and the locking column 253 is located at the end of the movable slot 23 away from the opening 211.

[0037] The working principle of this embodiment is as follows: when in use, the fixing tube 1 is installed on the seat, and the armrest plate is installed on the top of the lifting rod 2; in normal state, Figure 2-5 As shown, the positioning column 22 is located at the lower end (the lower end) of the linear slot 252, the locking column 253 is located at the end of the movable slot 23 close to the opening 211, the unlocking column 254 extends into the unlocking slot 12, and the ratchet block 251 extends out of the opening 211 to cooperate with the ratchet groove 111. It can be understood that, initially, the ratchet block 251 cooperates with the ratchet groove 111 located at the bottom; when the armrest needs to be raised and adjusted, the lifting rod 2 is lifted up, at this time the ratchet block 251 will gradually rise and gradually disengage from the ratchet groove 111, and the locking block 25 will rotate around the axis of the positioning column 22 in a direction away from the opening 211 (relative to the lifting rod 2), so that the spring 26 is compressed, the locking column 253 gradually moves to the end away from the opening 211, and the unlocking column 25 4 moves in the unlocking groove 12. It can be understood that there is sufficient space in the unlocking groove 12. In this process, the unlocking groove 12 will not hinder the movement of the unlocking column 254 and affect the movement of the locking block 25 until the ratchet block 251 completely leaves the tooth groove and rises to the position corresponding to the previous ratchet groove 111. Under the elastic force of the spring 26, the position of the locking block 25 is restored to the normal state. At this time, the ratchet block 251 cooperates with the ratchet groove 111 to achieve the upward adjustment of the armrest. Since the allowed movement direction of the ratchet bar 11 is from bottom to top, the ratchet block 251 cannot move downward under the restriction of the ratchet groove 111, so that the lifting rod 2 and the locking block 25 cannot fall, which helps the armrest to remain in a predetermined position and the structure is stable;

[0038] When the lifting rod 2 rises to the point where the ratchet block 251 cooperates with the uppermost ratchet groove 111, the unlocking column 254 and the lifting rod 2 can continue to rise. The specific process of the subsequent lowering and resetting of the lifting rod 2 and the locking block 25 is as follows: first, the lifting rod 2 and the locking block 25 are controlled to continue to rise until the unlocking column 254 abuts against the top of the unlocking groove 12. At this time, the lifting rod 2 can continue to rise, and the ratchet block 251 is separated from the ratchet groove 111 (after the ratchet block 251 is separated from the uppermost ratchet groove 111, it remains separated from the ratchet groove 111), the spring 26 is in a compressed state, the linear slot 252 is vertically set (rotated to a vertical state), and the locking column 253 moves to the end of the movable slot 23 away from the opening 211; then, the lifting rod 2 continues to rise, and the unlocking column 254 is blocked by the top of the unlocking groove 12 and cannot continue to rise. The locking block 25 cannot be raised further, so the lifting rod 2 will move relative to the locking block 25, causing the positioning column 22 to move vertically toward the upper end of the linear slot 252. Since the top of the locking slot 24 is connected to the end of the movable slot 23 away from the opening 211, the locking column 253 will relatively move vertically toward the bottom end of the locking slot 24 until the locking column 253 moves to the bottom end of the locking slot 24. At this time, the locking column 253 is separated from the movable slot 23. Under the cooperation of the locking slot 24 and the locking column 253, the locking block 25 cannot rotate relatively around the axis of the positioning column 22 under the elastic force of the spring 26. The locking block 25 is locked, so that the ratchet block 251 remains separated from the ratchet groove 111. The ratchet groove 111 will not hinder the ratchet block 251 from descending. Therefore, the lifting rod 2 and the locking block 25 can descend together. Figure 9-12 As shown, generally, at this time, the lifting rod 2 cannot continue to rise, that is, the lifting rod 2 is at the upper limit position; then, the lifting rod 2 and the locking block 25 are controlled to descend together until the unlocking column 254 abuts against the bottom end of the unlocking slot 12, at which time the lifting rod 2 can continue to descend, but the locking block 25 cannot continue to descend; then, the lifting rod 2 continues to descend, and the lifting rod 2 will move relative to the locking block 25, so that the positioning column 22 moves vertically toward the lower end of the linear slot 252, and the locking column 253 will relatively move vertically toward the top end of the locking slot 24, until the locking column 253 moves into the movable slot 23, thereby unlocking the locking block 25, as shown in FIG. Figure 13-16 As shown, generally, the lifting rod 2 cannot continue to descend at this time, that is, the lifting rod 2 is at the lower limit position. Thereafter, the position of the lifting rod 2 and the locking block 25 is adjusted. When the position of the ratchet groove 111 corresponds to the position of the lowest ratchet groove 111, the locking block 25 will be restored to its normal state under the action of the spring 26, that is, the ratchet block 251 cooperates with the lowest ratchet groove 111 to achieve the resetting of the lifting rod 2 and the locking block 25.

[0039] In summary, under normal conditions, the ratchet block 251 extends out of the opening 211 and cooperates with the ratchet groove 111. Since the ratchet bar 11 allows movement from bottom to top, the ratchet block 251 cannot move downward under the restriction of the ratchet groove 111, so that the lifting rod 2 and the locking block 25 cannot fall, which helps the lifting rod 2 to remain in a predetermined position and the structure is stable. When the lifting rod 2 needs to be raised and adjusted, the lifting rod 2 is lifted upward, and the ratchet block 251 will gradually rise and gradually disengage from the ratchet groove 111. When the ratchet block 251 rises to the position corresponding to the previous ratchet groove 111, the ratchet block 251 is restored under the action of the spring 26. When the lifting rod 2 is lifted to the normal state, the lifting adjustment of the lifting rod 2 can be realized by directly lifting the lowering rod 2, which is easy to operate. When the lifting rod 2 rises to the point where the ratchet block 251 cooperates with the uppermost ratchet groove 111, when it needs to be reset, the lowering rod 2 is lifted until the locking block 25 is locked, so that the ratchet block 251 remains separated from the ratchet groove 111. At this time, the lifting rod 2 is pressed down, and the lifting rod 2 and the locking block 25 descend together until the locking block 25 is unlocked. Thereafter, when the position of the tooth groove corresponds to the position of the lowermost ratchet groove 111, the locking block 25 will return to the normal state under the action of the spring 26, thereby resetting the lifting rod 2 and the locking block 25.

[0040] Exemplarily, the top of the ratchet groove 111 is provided with a first inclined surface 112 which gradually inclines toward the right from top to bottom, the bottom end of the ratchet groove 111 is provided with a horizontally arranged first plane 113, and the ratchet block 251 is provided with a second inclined surface 255 which cooperates with the first inclined surface 112 and a second plane 256 which cooperates with the first plane 113, thereby realizing the function of allowing the ratchet block 251 to rise and limiting the descent of the ratchet block 251.

[0041] The locking column 253 will move to the end away from the opening 211 until the unlocking column 254 moves to the top of the left side of the guide bevel 121. When the locking post 253 is in contact with the limiting step 122, the position of the ratchet block 251 is near the position of the lowest ratchet groove 111. Thereafter, the lifting rod 2 is controlled to continue to descend until the locking post 253 moves to the top of the locking slot 24 (located in the movable slot 23), and finally the slot lifting rod 2 and the locking block 25 continue to descend. When the position of the ratchet block 251 is relatively to the position of the lowest ratchet groove 111, under the elastic force of the spring 26, the ratchet block 251 cooperates with the lowest ratchet groove 111 to realize the reset of the lifting rod 2 and the locking block 25.

[0042] Exemplarily, the inner wall of the rear side of the fixed tube 1 is provided with a limit groove 13 arranged vertically, and the rear side of the lifting rod 2 is provided with a limit block 27. When the limit block 27 rises to abut against the top end of the limit groove 13, the lifting rod 2 is in the upper limit position. When the limit block 27 descends to abut against the bottom end of the limit groove 13, the lifting rod 2 is in the lower limit position, thereby preventing the lifting rod 2 from rising or falling excessively. The length of the limit groove 13 is sufficient and will not affect the normal operation of the lifting rod 2.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A seat armrest lifting and adjusting mechanism, characterized in that: Including fixed tube and lifting rod, A ratchet bar is provided on the right inner wall of the fixing tube, and the ratchet bar is allowed to move in a direction from bottom to top. A plurality of ratchet grooves arranged vertically are provided on the left side of the ratchet bar, and an unlocking groove is provided on the front inner wall of the fixing tube. The lifting rod can be inserted into the fixing tube in a vertical sliding manner, a mounting groove is provided on the front side of the lifting rod, the right side of the mounting groove is an opening, a positioning column, a movable slot hole, a locking slot hole and a locking block are provided in the mounting groove, the movable slot hole is arranged around the axis of the positioning column, the locking slot hole is arranged vertically, and the top end of the locking slot hole is connected to the end of the movable slot hole away from the opening, A linear slot and a locking column are provided on the rear side of the locking block, the positioning column is inserted into the linear slot, the positioning column and the linear slot are rotatably and slidably connected, the locking column can be slidably inserted into the movable slot, the left side of the locking block is connected to the left side of the mounting groove through a spring, and a ratchet block extending out of the opening is provided on the right side of the locking block, and the ratchet block cooperates with the ratchet groove. An unlocking column is provided on the front side of the locking block, and the unlocking column can be movably extended into the unlocking groove. When the unlocking column moves up to abut against the top of the unlocking groove, the ratchet block is separated from the ratchet groove, the linear slot is vertically arranged, and the locking column is located at the end of the movable slot away from the opening.

2. The seat armrest lifting and adjusting mechanism according to claim 1, characterized in that: The top of the ratchet groove is provided with a first inclined surface which gradually tilts to the right from top to bottom, the bottom of the ratchet groove is provided with a horizontally arranged first plane, and the ratchet block is provided with a second inclined surface which matches the first inclined surface and a second plane which matches the first plane.

3. The seat armrest lifting and adjusting mechanism according to claim 1, characterized in that: A guiding slope is provided at the top of the unlocking groove, and the guiding slope gradually inclines toward the left side from bottom to top, and a limiting step is provided at the left bottom end of the unlocking groove.

4. The seat armrest lifting and adjusting mechanism according to claim 1, characterized in that: A limiting groove arranged vertically is arranged on the inner wall at the rear side of the fixing tube, and a limiting block is arranged at the rear side of the lifting rod, and the limiting block is slidably connected with the limiting groove.

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