Armrest adjusting mechanism and seat

Abstract

The utility model provides an armrest adjusting mechanism and a seat, the armrest adjusting mechanism comprises a connecting seat and an armrest body, an adjusting mechanism is arranged between the connecting seat and the armrest body, the adjusting mechanism comprises a fluted disc and a swinging tooth piece, the fluted disc is fixedly arranged on one of the connecting seat and the armrest body, and the swinging tooth piece is arranged on the connecting seat. The swinging tooth piece is rotationally mounted on the other one of the connecting seat and the armrest body and can elastically swing back and forth; according to the armrest adjusting mechanism, the fluted disc arranged between the connecting seat and the armrest body is matched with the swing tooth piece occupying a small radial space, so that the armrest body can rotate up and down to be adjusted to a corresponding position, the armrest adjusting mechanism is arranged on a seat, the structural layout of the armrest adjusting mechanism is optimized, and the manufacturing cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to an armrest adjustment mechanism and a seat. Background Art

[0002] In order to meet the various usage needs of users, existing chairs are equipped with rotatable and adjustable armrests. When sitting normally, the armrests remain horizontal to support the user's arms; when the user needs to raise his arms, the armrests can be adjusted to the corresponding position to provide follow-up support for the arms.

[0003] For example, in the armrest rotation adjustment device previously designed by the applicant with publication number CN214963958, the armrest body can be rotated upward counterclockwise by cooperating with the movable tooth and the fixed gear disc in the rotation positioning mechanism; thereby, the angle and height of the armrest body can be adjusted simultaneously to adapt to the dynamic changes of the user's arm.

[0004] However, such a design has its shortcomings. Specifically, the movable tooth adopts a radial movable manner to cooperate with the fixed teeth on the fixed toothed disc. In order to ensure smooth and stable movement of the movable tooth, two guide holes are provided on the movable tooth to facilitate radial sliding cooperation with the connecting column on the armrest. Therefore, the movable tooth extends a large length in the radial direction, which makes the movable tooth occupy a large space on the armrest body, which not only increases the production cost, but also leads to an unreasonable structural layout of the rotation positioning mechanism. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, the utility model provides an armrest adjustment mechanism and a seat. By cooperating with a gear plate arranged between the connecting seat and the armrest body and a swinging gear piece occupying a smaller radial space, the armrest body can be rotated up and down to adjust to the corresponding position, thereby optimizing the structural layout of the armrest adjustment mechanism and effectively reducing the production cost.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] 18. The seat belt device of claim 17, wherein the adjusting mechanism comprises a connecting seat and an armrest body, the connecting seat being used to be mounted on the seat, and the rear end of the armrest body being rotatably connected to the connecting seat and capable of rotating up and down; an adjusting mechanism is provided between the connecting seat and the armrest body, the adjusting mechanism comprising a gear disc and a swinging gear member, the gear disc being fixedly mounted on one of the connecting seat and the armrest body, and the swinging gear member being rotatably mounted on the other of the connecting seat and the armrest body, and capable of elastically swinging back and forth; a ratchet group is provided on a side of the gear disc facing the swinging gear member, the ratchet group comprising a plurality of ratchet teeth uniformly distributed along the circumference and extending obliquely, a disengagement end being provided at the upper end of the ratchet group, and a reset end being provided at the lower end of the ratchet group; a ratchet groove is formed between every two adjacent ratchet teeth, and a latch tooth matching the ratchet groove is provided on a side of the swinging gear member facing the gear disc; the armrest adjusting mechanism also comprises a locking structure, when the latch tooth acts on the disengagement end and disengages from the ratchet groove, the locking structure can limit the swinging gear member from rotating toward one side of the gear disc;

[0008] The armrest adjustment mechanism has an adjustment state and a reset state. When the armrest adjustment mechanism is in the adjustment state, an external force rotates the armrest body upward and drives the latch gear to switch between multiple ratchet grooves, so that the swinging tooth piece swings elastically back and forth. When the armrest body is rotated into place, the latch gear cooperates with the corresponding ratchet groove and the armrest body stops; when the armrest body continues to rotate upward and the latch gear contacts the disengagement end, the latch gear separates from the ratchet groove, and the locking structure restricts the swinging tooth piece from rotating to one side of the toothed disc. At this time, the armrest body can rotate downward. When the armrest body rotates downward and the latch gear contacts the reset end, the reset end acts on the latch gear and forces the swinging tooth piece to disengage from the locking structure, so that the latch gear engages with the corresponding ratchet groove. At this time, the armrest adjustment mechanism switches to the reset state.

[0009] Preferably, the toothed disc is fixedly mounted on the connecting seat, and the swinging toothed piece is rotatably mounted on the armrest body; the mounting space on the armrest body is relatively large, which facilitates the arrangement of the swinging toothed piece and the locking structure.

[0010] Preferably, an elastic member is provided on the armrest body, which acts on the swinging tooth member and provides elastic force for the elastic swing of the swinging tooth member, so that the latching teeth always have a tendency to be latched into the ratchet groove.

[0011] Preferably, an arc-shaped slot extending along the rotation direction of the swinging tooth is provided on the armrest body, and the elastic member is a first compression spring arranged in the arc-shaped slot and acting on the swinging tooth; the arc-shaped slot can reduce the space occupied by the first compression spring and further optimize the layout of the armrest adjustment mechanism.

[0012] Preferably, the position where the swinging tooth is rotatably connected to the armrest body is the hinge end, and the elastic member is a torsion spring arranged at the hinge end and acting on the swinging tooth; the torsion spring occupies less space, which can make the layout of the armrest adjustment mechanism more precise and reasonable.

[0013] Preferably, a receiving hole is provided on the armrest body, and the locking structure includes a limiting ball in the receiving hole and a second compression spring acting on the limiting ball. The swinging tooth is provided with a clamping hole corresponding to the position of the limiting ball. When the clamping tooth is clamped into the corresponding ratchet groove, the limiting ball and the clamping hole are staggered with each other, and the limiting ball retracts into the receiving hole; when the clamping tooth contacts the disengagement end and disengages from the ratchet groove, the limiting ball is aligned with the clamping hole and is clamped into the clamping hole under the elastic action of the second compression spring to limit the swinging tooth from rotating toward one side of the gear disc, so as to ensure that the clamping tooth will not accidentally be clamped into the ratchet groove when the armrest body rotates downward.

[0014] Preferably, the swinging tooth piece is provided with an arc-shaped slide groove extending along its own rotation direction, and the armrest body is provided with a slide rod corresponding to the position of the arc-shaped slide groove, which passes through the arc-shaped slide groove to guide the swinging of the swinging tooth piece.

[0015] Preferably, a pressure plate is connected to the armrest body, and the pressure plate is pressed on the swinging tooth piece to prevent the swinging tooth piece from separating from the armrest body.

[0016] Preferably, the connecting seat and the armrest body are respectively connected with a first stop cover and a second stop cover that cover the gear disc and the swinging gear; the first stop cover and the second stop cover can play a certain sealing role and also make the armrest body look simpler in appearance.

[0017] Preferably, the swinging tooth has a protrusion adjacent to the latch tooth, and the locking structure is an elastic protrusion arranged on the armrest body, and the elastic protrusion is located on the side away from the latch tooth; when the latch tooth is engaged in the corresponding ratchet groove, the protrusion is separated from the elastic protrusion, and when the latch tooth contacts the disengagement end and disengages from the ratchet groove, the protrusion passes over and reaches the other side of the elastic protrusion, and causes the elastic protrusion to deform and then reset to resist the protrusion, thereby limiting the swinging tooth from rotating toward one side of the toothed disc; to ensure that the latch tooth will not accidentally engage in the ratchet groove when the armrest body rotates downward.

[0018] A chair comprises the armrest adjustment mechanism.

[0019] The beneficial effects of the utility model using the above technical solution are:

[0020] The utility model adopts an elastically swinging swinging tooth piece to cooperate with the toothed disc. Since the swinging tooth piece is rotatably installed on the connecting seat or the armrest body, the swinging tooth piece does not need to be extended in the radial direction of the toothed disc, so that the space occupied by the entire armrest adjustment mechanism is smaller. While ensuring that the position of the armrest body can be adjusted, the layout of the armrest adjustment mechanism is optimized and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an enlarged view of the armrest adjustment mechanism;

[0022] Figure 2 This is an exploded view of the armrest adjustment mechanism;

[0023] Figure 3 This is a schematic diagram of the engagement of the latch teeth in the ratchet groove in the adjustment state;

[0024] Figure 4 Schematic diagram of the latch tooth disengaging from the ratchet groove after contacting the disengagement end;

[0025] Figure 5 This is a schematic diagram of the armrest rotating downward and causing the latching teeth to gradually approach the reset end;

[0026] Figure 6 This is a schematic diagram of the reset end acting on the latching teeth and causing the latching teeth to be re-engaged in the ratchet groove;

[0027] Figure 7 Schematic diagram of the elastic protrusion pressing against the protrusion in Example 2;

[0028] Figure 8 Schematic diagram of the elastic protrusion after separation from the protruding portion in Example 2;

[0029] The figures are marked as follows: 1-connecting seat, 2-armrest body, 3-toothed disc, 4-swinging tooth, 5-first compression spring, 6-limiting ball, 7-pressure plate, 8-first stop cover, 9-second stop cover, 21-slide rod, 22-arc-shaped slot, 23-support shaft, 24-groove, 25-accommodating hole, 26-rib, 27-elastic protrusion, 31-ratchet groove, 32-disengagement end, 33-reset end, 41-grip, 42-arc-shaped slot, 43-extension, 44-hole, 45-protrusion, 61-second compression spring. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0031] 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 scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0032] The present invention has multiple embodiments, and the specific implementation methods are as follows:

[0033] Example 1: Figure 1-6As shown, this embodiment provides an armrest adjustment mechanism, including a connecting seat 1 and an armrest body 2, the connecting seat 1 is used to be installed on the seat, and the rear end of the armrest body 2 is rotatably connected to the connecting seat 1 and can be rotated up and down; in order to ensure the position adjustment effect of the armrest body 2, an adjustment mechanism is provided between the connecting seat 1 and the armrest body 2, and the adjustment mechanism includes a toothed disc 3 and a swinging tooth piece 4, the toothed disc 3 is fixedly mounted on one of the connecting seat 1 and the armrest body 2, and the swinging tooth piece 4 is rotatably mounted on the other of the connecting seat 1 and the armrest body 2, and can be elastically swung back and forth; the toothed disc 3 has a ratchet group on the side facing the swinging tooth piece 4, and the ratchet group includes a toothed disc 3 and a ratchet group along the side facing the swinging tooth piece 4. A plurality of ratchet teeth are evenly distributed around the circumference, with a disengagement end 32 at the upper end of the ratchet group and a reset end 33 at the lower end of the ratchet group. In this embodiment, the disengagement end 32 extends outwardly beyond the ratchet teeth and is connected to the uppermost ratchet groove 31 via a smooth, upwardly extending inclined surface. The reset end 33 also extends outwardly beyond the ratchet teeth. A ratchet groove 31 is formed between every two adjacent ratchet teeth. A latching tooth 41 is provided on the side of the swinging tooth member 4 facing the toothed disc 3, which matches the ratchet groove 31. The armrest adjustment mechanism also includes a locking structure. When the latching tooth 41 interacts with the disengagement end 32 and disengages from the ratchet groove 31, the locking structure can prevent the swinging tooth member 4 from rotating toward the toothed disc 3.

[0034] When the armrest adjusting mechanism is in the adjusting state, the external force rotates the armrest body 2 upward and drives the latch tooth 41 to switch between multiple ratchet grooves 31, so that the swinging tooth piece 4 swings elastically back and forth. When the armrest body 2 is rotated into place, the latch tooth 41 cooperates with the corresponding ratchet groove 31 and stops the armrest body 2; when the armrest body 2 continues to rotate upward and the latch tooth 41 contacts the disengagement end 32, the latch tooth 41 separates from the ratchet groove 31, and the locking structure restricts the swinging tooth piece 4 from rotating to one side of the toothed disc 3. At this time, the armrest body 2 can rotate downward. As the latch tooth 41 gradually approaches the reset end 33, the reset end 33 will intersect with the tip part of the latch tooth 41. When the armrest adjusting mechanism is in the adjusting state, the external force rotates the armrest body 2 upward and drives the latch tooth 41 to switch between multiple ratchet grooves 31, so that the swinging tooth piece 4 swings elastically back and forth.

[0035] Furthermore, since the installation space on the armrest body 2 is large, it is convenient to arrange the swinging gear 4 and the locking structure, so the gear disc 3 in this embodiment is fixedly installed on the connecting seat 1, and the swinging gear 4 is rotatably installed on the armrest body 2; specifically, the gear disc 3 is fixedly connected to the connecting seat 1 by screws, and the armrest body 2 has a groove 24, and the bottom of the groove 24 has a support shaft 23, and the swinging gear 4 has a corresponding socket hole. The swinging gear 4 is sleeved on the support shaft 23 through the socket hole, so that the swinging gear 4 can swing back and forth, and a pressure plate 7 is connected to the armrest body 2, and the pressure plate 7 is pressed on the swinging gear 4 to prevent the swinging gear 4 from detaching from the armrest body 2.

[0036] Furthermore, the reason why the swinging tooth 4 can swing elastically is that an elastic member is provided on the armrest body 2, which acts on the swinging tooth 4 and provides elastic force for the elastic swing of the swinging tooth 4; so that the latching tooth 41 always has a tendency to be stuck in the ratchet groove 31; specifically, an arc-shaped latching groove 22 extending along the rotation direction of the swinging tooth 4 is provided on the armrest body 2, and the elastic member is a first compression spring 5 arranged in the arc-shaped latching groove 22 and acting on the swinging tooth 4. In order to avoid separation of the first compression spring 5 from the swinging tooth 4, an extension portion 43 inserted into the first compression spring 5 is provided on the swinging tooth 4; wherein the extension direction of the arc-shaped latching groove 22 corresponds to the rotation direction of the swinging tooth 4, and will not occupy a large space in the radial direction of the tooth disc 3, thereby reducing the space occupied by the first compression spring 5, and further optimizing the layout of the armrest adjustment mechanism.

[0037] Furthermore, the locking structure in this embodiment is as follows: a receiving hole 25 is provided on the armrest body 2, the locking structure includes a limiting ball 6 in the receiving hole 25, a second compression spring 61 acting on the limiting ball 6, and the swinging tooth member 4 is provided with a latching hole 44 corresponding to the position of the limiting ball 6. When the latching tooth 41 is latched into the corresponding ratchet groove 31, the limiting ball 6 and the latching hole 44 are staggered with each other, and the limiting ball 6 is retracted into the receiving hole 25; when the latching tooth 41 contacts the disengagement end 32 and disengages from the ratchet groove 31, the locking structure 25 is provided. When the armrest body 2 rotates downward, the locking tooth 41 will not accidentally get stuck in the ratchet groove 31, thereby ensuring that the armrest body 2 can be reset normally; when the reset end 33 acts on the locking tooth 41, the reset end 33 will force the locking hole 44 to break away from the restriction of the limiting ball 6, and cause the second compression spring 61 to deform, so that the locking hole 44 and the limiting ball 6 are staggered again.

[0038] Furthermore, in order to make the swinging gear 4 rotate more smoothly, the swinging gear 4 is provided with an arc-shaped slide groove 42 extending along its own rotation direction. The extension direction of the arc-shaped slide groove 42 corresponds to the rotation direction of the swinging gear 4, and will not cause the swinging gear 4 to occupy a large space in the radial direction of the gear disc 3; the armrest body 2 is provided with a sliding rod 21 corresponding to the position of the arc-shaped slide groove 42, and the sliding rod 21 passes through the arc-shaped slide groove 42 to guide the swinging of the swinging gear 4.

[0039] Furthermore, in order to ensure the appearance of the seat and the sealing of the components, the connecting seat 1 and the armrest body 2 are respectively connected with a first block cover 8 and a second block cover 9 that cover the gear plate 3 and the swinging gear 4; the first block cover 8 and the second block cover 9 can play a certain sealing role and also make the armrest body 2 look simpler in appearance.

[0040] Furthermore, the swinging tooth 4 will form a surface contact with the bottom of the groove 24 when swinging. Therefore, after the armrest adjustment mechanism is used for a long time, the swinging tooth 4 will continue to wear against the bottom of the groove 24. Therefore, in this embodiment, a rib 26 that contacts the swinging tooth 4 is provided on the bottom of the groove 24. The rib 26 can separate the swinging tooth 4, reduce the contact area between the swinging tooth 4 and the bottom of the groove 24, make the swinging tooth 4 rotate more smoothly, and at the same time avoid the wear caused by long-term use of the armrest adjustment mechanism.

[0041] A chair is further provided, including the armrest adjustment mechanism, wherein the connecting seat 1 can be set on the chair back or the armrest bracket according to different usage requirements. For example, the connecting seat 1 in this embodiment is set on both sides of the chair back, so that when the chair back is reclined, the armrest body 2 can synchronously support the user's arms.

[0042] Example 2: Figure 7-8 As shown, the locking structure of this embodiment is different from that of the above-mentioned embodiment, wherein the swinging tooth member 4 has a protrusion 45 adjacent to the latch tooth 41, and the locking structure is an elastic protrusion 27 provided on the armrest body 2, which will produce elastic deformation after being subjected to force; the elastic protrusion 27 is located on the side away from the latch tooth 41; when the latch tooth 41 is engaged with the corresponding ratchet groove 31, the protrusion 45 is separated from the elastic protrusion 27, and when the latch tooth 41 contacts the disengagement end 32 and disengages from the ratchet groove 31, the protrusion 45 passes over and It reaches the other side of the elastic protrusion 27 and causes the elastic protrusion 27 to reset after deformation to resist the protrusion 45, thereby limiting the swinging tooth 4 from rotating toward the side of the toothed disc 3, to ensure that the latching tooth 41 will not accidentally get stuck in the ratchet groove 31 when the armrest body 2 rotates downward; when the reset end 33 acts on the latching tooth 41, the reset end 33 will force the protrusion 45 to pass over from the other side of the elastic protrusion 27 and cause the elastic protrusion 27 to reset after deformation, at which time the protrusion 45 is separated from the elastic protrusion 27 again.

[0043] Example 3: This embodiment is different from the above embodiments in that the elastic member that provides elastic swing for the swinging tooth member 4 is no longer a compression spring. Specifically, the position where the swinging tooth member 4 is rotatably connected to the armrest body 2 is a hinge end, and the elastic member is a torsion spring (not shown) arranged at the hinge end position and acting on the swinging tooth member 4; the torsion spring occupies a smaller space and can be directly mounted on the support shaft 23, and the two force arms act on the swinging tooth member 4 and the armrest body 2 respectively. This design reduces the space occupied by the elastic member and makes the layout of the armrest adjustment mechanism more precise and reasonable.

[0044] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. An armrest adjustment mechanism, characterized in that: The invention comprises a connecting seat (1) and an armrest body (2), wherein the connecting seat (1) is used for being mounted on a seat, and the rear end of the armrest body (2) is rotatably connected to the connecting seat (1) and can be rotated up and down; an adjustment mechanism is provided between the connecting seat (1) and the armrest body (2), and the adjustment mechanism comprises a toothed disc (3) and a swinging toothed piece (4); the toothed disc (3) is fixedly mounted on one of the connecting seat (1) and the armrest body (2), and the swinging toothed piece (4) is rotatably mounted on the other of the connecting seat (1) and the armrest body (2), and can be elastically swung back and forth; the toothed disc (3) is oriented toward the swinging toothed piece ( 4) has a ratchet group on one side, the ratchet group includes a plurality of ratchet teeth uniformly distributed along the circumference and extending obliquely, the upper end of the ratchet group has a disengagement end (32), and the lower end of the ratchet group has a reset end (33); a ratchet groove (31) is formed between every two adjacent ratchet teeth, and a latching tooth (41) matching the ratchet groove (31) is provided on the side of the swinging tooth piece (4) facing the toothed disc (3); the armrest adjustment mechanism also includes a locking structure, and when the latching tooth (41) acts on the disengagement end (32) and disengages from the ratchet groove (31), the locking structure can limit the swinging tooth piece (4) from rotating toward the toothed disc (3); The armrest adjustment mechanism has an adjustment state and a reset state. When the armrest adjustment mechanism is in the adjustment state, an external force rotates the armrest body (2) upward, and drives the latching teeth (41) to switch between a plurality of ratchet grooves (31), so that the swinging tooth piece (4) elastically swings back and forth. When the armrest body (2) is rotated into place, the latching teeth (41) cooperate with the corresponding ratchet grooves (31) and make the armrest body (2) stop; when the armrest body (2) continues to rotate upward and makes the latching teeth (41) engage with the disengagement end (32), the armrest body (2) is released. When the latch (41) is in contact with the ratchet groove (31), the locking structure restricts the swinging tooth (4) from rotating toward one side of the toothed disc (3). At this time, the armrest body (2) can rotate downward. When the armrest body (2) rotates downward and the latch (41) contacts the reset end (33), the reset end (33) acts on the latch (41) and forces the swinging tooth (4) to disengage from the locking structure, so that the latch (41) engages with the corresponding ratchet groove (31). At this time, the armrest adjustment mechanism switches to the reset state.

2. The armrest adjustment mechanism according to claim 1, characterized in that: The toothed disc (3) is fixedly mounted on the connecting seat (1), and the swinging toothed piece (4) is rotatably mounted on the armrest body (2).

3. The armrest adjustment mechanism according to claim 2, characterized in that: An elastic member is provided on the armrest body (2), and the elastic member acts on the swinging tooth member (4) and provides elastic force for the elastic swing of the swinging tooth member (4).

4. The armrest adjustment mechanism according to claim 3, characterized in that: The armrest body (2) is provided with an arc-shaped slot (22) extending along the rotation direction of the swinging tooth piece (4), and the elastic piece is a first compression spring (5) arranged in the arc-shaped slot (22) and acting on the swinging tooth piece (4).

5. The armrest adjustment mechanism according to claim 3, characterized in that: The position where the swinging tooth piece (4) is rotatably connected to the armrest body (2) is a hinge end, and the elastic piece is a torsion spring arranged at the hinge end position and acting on the swinging tooth piece (4).

6. The armrest adjustment mechanism according to claim 2, characterized in that: The armrest body (2) is provided with a receiving hole (25), and the locking structure includes a limiting ball (6) in the receiving hole (25), a second compression spring (61) acting on the limiting ball (6), and the swinging tooth (4) is provided with a clamping hole (44) corresponding to the position of the limiting ball (6). When the clamping tooth (41) is clamped into the corresponding ratchet groove (31), the limiting ball (6) and the clamping hole (44) are staggered with each other, and the limiting ball (6) is retracted into the receiving hole (25); when the clamping tooth (41) contacts the disengagement end (32) and disengages from the ratchet groove (31), the limiting ball (6) is aligned with the clamping hole (44) and is clamped into the clamping hole (44) under the elastic action of the second compression spring (61) to limit the swinging tooth (4) from rotating toward one side of the toothed disc (3).

7. The armrest adjustment mechanism according to claim 2, characterized in that: The swinging tooth member (4) is provided with an arc-shaped slide groove (42) extending along its own rotation direction, and the armrest body (2) is provided with a slide rod (21) corresponding to the position of the arc-shaped slide groove (42), and the slide rod (21) passes through the arc-shaped slide groove (42) to guide the swinging of the swinging tooth member (4).

8. The armrest adjustment mechanism according to claim 2, characterized in that: A pressure plate (7) is connected to the armrest body (2), and the pressure plate (7) is pressed onto the swinging tooth piece (4) to prevent the swinging tooth piece (4) from separating from the armrest body (2).

9. The armrest adjustment mechanism according to claim 1, characterized in that: A first blocking cover (8) and a second blocking cover (9) for shielding the toothed disc (3) and the swinging toothed member (4) are respectively connected to the connecting seat (1) and the armrest body (2).

10. The armrest adjustment mechanism according to claim 2, characterized in that: The swinging tooth (4) has a protrusion (45) adjacent to the latch (41), and the locking structure is an elastic protrusion (27) provided on the armrest body (2), and the elastic protrusion (27) is located on a side away from the latch (41); when the latch (41) is engaged with the corresponding ratchet groove (31), the protrusion (45) is separated from the elastic protrusion (27); when the latch (41) contacts the disengagement end (32) and disengages from the ratchet groove (31), the protrusion (45) passes over and reaches the other side of the elastic protrusion (27), and causes the elastic protrusion (27) to deform and then reset to resist the protrusion (45), thereby limiting the swinging tooth (4) from rotating toward one side of the toothed disc (3).

11. A seat, characterized in that: It includes the armrest adjustment mechanism according to claim 1.

Images