A multi-degree-of-freedom adjustable seat armrest frame

Abstract

The utility model discloses a kind of seat armrest frames of multiple degrees of freedom adjustment, including the adjusting mechanism of installation plate on the lower part of cutting vehicle seat, armrest mechanism, handle mechanism;The adjusting mechanism is respectively arranged in the front and rear sides of installation plate, and adjusting mechanism can swing on installation plate;The armrest mechanism includes armrest subassembly, sliding subassembly;The armrest subassembly is arranged on the top surface of adjusting mechanism by the sliding subassembly, and can slide on adjusting mechanism;The handle mechanism is connected with armrest mechanism, and handle mechanism can swing on armrest mechanism.The utility model can be freely adjusted according to the actual body shape and driving habit of driver, can give driver better driving and operation comfort, and the degree of freedom of adjustment is high, convenient to use, and widely used.

Description

Technical Field

[0001] This utility model belongs to the field of logging equipment technology, and in particular relates to a seat armrest frame that can be adjusted with multiple degrees of freedom. Background Technology

[0002] When logging operations are carried out in forest areas with complex terrain and harsh working conditions, the cab of the logging vehicle will shake and sway from side to side with the frame. The logging vehicle has no steering wheel, and the driver controls the vehicle by using the control handle on the seat. Since the logging vehicle has no steering wheel, the driver can only rely on the seat armrest to support and stabilize the driver's arms to ensure that the driver can work safely and comfortably.

[0003] like Figure 14 The diagram shows a schematic of a conventional logging vehicle seat. The existing armrest is fixed to the seat back, with the fixing point on the backrest. The extension length is too long, resulting in insufficient sturdiness and inability to provide adequate stable support for the driver's arms. Moreover, since the armrest is installed together with the backrest, the horizontal angle of the armrest also changes when the seat backrest angle is adjusted. Although the existing armrest can be adjusted to a certain angle, the degree of adjustment is still relatively small, and it cannot be further adjusted according to the driver's actual body shape and driving habits. Furthermore, it is inconvenient to install a handle box. Utility Model Content

[0004] The purpose of this utility model is to provide a seat armrest that can be adjusted with multiple degrees of freedom, so as to solve the technical problems mentioned in the background art. To achieve the above objectives, the present invention adopts the following technical solution: A multi-degree-of-freedom adjustable seat armrest includes an adjustment mechanism, an armrest mechanism, and a handle mechanism mounted on a mounting plate under the seat of a logging vehicle. The adjustment mechanism is located on the front and rear sides of the mounting plate and can swing on the mounting plate. The armrest mechanism includes an armrest assembly and a sliding assembly. The armrest assembly is mounted on the top surface of the adjustment mechanism via the sliding assembly and can slide on the adjustment mechanism. The handle mechanism is connected to the armrest mechanism and can swing on the armrest mechanism.

[0005] Furthermore, the adjustment mechanism includes a support rod, a lower swing assembly, and an upper swing assembly; the lower swing assembly includes a first lower pressure plate, a second lower pressure plate, a lower ball head, and a lower ratchet hand-tightening bolt; the first lower pressure plate is located below the second lower pressure plate, the right sides of the first and second lower pressure plates are connected to the mounting plate, and the left sides are connected to each other by the lower ratchet hand-tightening bolt; a vertical through hole is provided in the middle of the first and second lower pressure plates; the through hole has a rounded chamfer; the lower ball head is located inside the first and second lower pressure plates; the support rod is vertically arranged, its lower end passes through the lower ball head, and extends out of the bottom surface of the mounting plate.

[0006] Furthermore, the upper swing assembly includes a first upper pressure plate, a second upper pressure plate, an upper ball head, and an upper ratchet hand-tightening bolt; the first and second upper pressure plates have vertically penetrating through holes in their middle sections; the through holes have rounded chamfers; the upper ball head is fixedly mounted on the top of the support rod; the first upper pressure plate is sleeved on the support rod through its through hole and is located below the upper ball head; the second upper pressure plate is located above the upper ball head, and the left sides of the first and second upper pressure plates are connected to each other by the upper ratchet hand-tightening bolt.

[0007] Furthermore, the support rod has a horizontally penetrating insertion hole at its bottom; it also includes a locking pin; the locking pin passes through the insertion hole and connects to the support rod.

[0008] Furthermore, it also includes a ferrule and a dust cover; the ferrule is respectively disposed on the top surface of the through hole of the second lower pressure plate and the bottom surface of the through hole of the first upper pressure plate; the dust cover is sleeved on the support rod, and its two ends are respectively connected to the ferrule.

[0009] Furthermore, it also includes a compression spring; the compression spring is sleeved on the support rod and located inside the dust cover.

[0010] Furthermore, the handrail assembly includes a lower housing, a bracket, a main housing, an upper housing, and a rubber pad; the lower housing is horizontally positioned, with a through groove on its bottom surface and an opening at its right end; the bracket is fixedly installed inside the lower housing, with vertical channels on its left and right sides in its middle section; the main housing is connected to the top surface of the lower housing; the upper housing is connected to the top surface of the main housing; the rubber pad is located on the top surface of the upper housing; the sliding assembly includes a slide rail and a slider; the slider is located within the channel of the bracket, its bottom passing through the through groove on the bottom surface of the lower housing and fixedly connected to the top surface of the second upper pressure plate; the slide rail is horizontally positioned left and right, and spaced back and forth on both sides of the top surface of the bracket, with the slide rail and the upper part of the slider slidably connected.

[0011] Furthermore, the slider has multiple fixing holes spaced apart on its front and rear side walls; the bracket and the lower housing side walls have insertion holes corresponding to the fixing holes; it also includes locking screws; the locking screws pass through the insertion holes of the bracket and the lower housing and connect to the fixing holes.

[0012] Furthermore, the handle mechanism includes a handle body, a connecting rod, a handle ball head, a handle ball head pressure plate, and a handle ratchet hand-tightening bolt; the connecting rod is horizontally arranged, with one end fixedly connected to the handle body and the other end fixedly connected to the handle ball head; the handle ball head has a through hole on its side wall; the handle ball head pressure plate is fixedly located at the right end of the bracket, with two plates spaced apart front and back, and the handle ball head pressure plate has a first threaded connection hole on its side wall; the handle ratchet hand-tightening bolt passes through the first threaded connection hole and the through hole in sequence, so that the two handle ball head pressure plates press the handle ball head together, connecting the handle ball head between the two handle ball head pressure plates.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. This utility model, by setting an adjustment mechanism, allows the entire armrest frame to swing at multiple angles on the seat via the lower swing component, thereby adjusting the position of the entire armrest frame. The armrest mechanism can also swing at multiple angles via the upper swing component, thereby adjusting the armrest angle. This allows for free adjustment according to the driver's actual body shape and driving habits, providing the driver with better driving and operation comfort. It has a high degree of adjustment freedom, is easy to use, and has a wide range of applications. At the same time, the entire armrest frame is installed under the seat and will not change with the angle of the seat back.

[0014] 2. In the handrail mechanism of this utility model, by setting a sliding component, the handrail component can be moved on the adjustment mechanism, thereby adjusting according to the length of the driver's arm, further improving comfort and applicability.

[0015] 3. The handrail mechanism and handle mechanism of this utility model are connected by a handle ball head, a handle ball head pressure plate and a handle ratchet hand-tightening bolt, which makes it easy to integrate the handle body onto the handrail frame and to adjust the handle angle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the connection structure of this utility model; Figure 2 This is a schematic diagram of the connection structure from another perspective of this utility model; Figure 3 This is a schematic diagram of the structure of this utility model; Figure 4 This is a schematic diagram of the connection mechanism of the adjustment mechanism, armrest mechanism, and handle mechanism of this utility model.

[0017] Figure 5 This is an exploded view of the adjusting mechanism of this utility model; Figure 6 This is a schematic diagram of the lower ball head structure of this utility model; Figure 7 This is a schematic diagram of the circular arc chamfer structure of this utility model; Figure 8 This is a cross-sectional view of the adjustment mechanism of this utility model; Figure 9 This is a structural schematic diagram of the handrail mechanism of this utility model; Figure 10 This is a schematic diagram of the handle mechanism of this utility model; Figure 11 This is a schematic diagram of the adjustable configuration of the handrail frame of this utility model; Figure 12 This is a schematic diagram of the adjustment mode of the handrail mechanism of this utility model; Figure 13 This is a schematic diagram of the adjustment configuration of the handle mechanism of this utility model; Figure 14 This is a schematic diagram of the installation of existing handrail frames.

[0018] In the attached diagram, 1-Adjustment mechanism; 11-Support rod; 111-Clamping hole; 12-Lower swing assembly; 121-First lower pressure plate; 122-Second lower pressure plate; 123-Lower ball head; 124-Lower ratchet hand-tightening bolt; 13-Upper swing assembly; 131-First upper pressure plate; 132-Second upper pressure plate; 133-Upper ball head; 134-Upper ratchet hand-tightening bolt; 14-Chamfered corner; 15-Snap pin; 16-Clip sleeve; 17-Dust cover; 18-Compression spring; 2-Handrail mechanism; 21-Armrest assembly; 211-Lower housing; 2111-Opening; 2112-First insertion hole; 2113-Second threaded connection hole; 212-Bracket; 2121-Channel; 2122-Second socket; 213 - Main housing; 214 - Upper housing; 215 - Rubber pad; 22-Sliding assembly; 221-Slide rail; 222-Slider; 2221-Fixing hole; 223-Locking screw; 3-Handle mechanism; 31-Handle body; 32-Connecting rod; 33-Handle ball head; 331-Smooth hole; 34-Handle ball head pressure plate; 341-First threaded connection hole; 35-Handle ratchet hand-tightening bolt; 4-Mounting plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the utility model, and these aspects can be achieved even without these specific details.

[0020] like Figure 1-13 As shown, a multi-degree-of-freedom adjustable seat armrest includes an adjustment mechanism 1, an armrest mechanism 2, and a handle mechanism 3, all mounted on a mounting plate 4 under the logging vehicle seat. The mounting plate 4 is pre-assembled on the logging vehicle seat. The adjustment mechanism 1 is located on the front and rear sides of the mounting plate 4 and can swing on the mounting plate 4. The armrest mechanism 2 includes an armrest assembly 21 and a sliding assembly 22. The armrest assembly 21 is located on the top surface of the adjustment mechanism 1 via the sliding assembly 22 and can slide on the adjustment mechanism 1. The handle mechanism 3 is connected to the armrest mechanism 2 and can swing on the armrest mechanism 2.

[0021] The adjustment mechanism 1 includes a support rod 11, a lower swing assembly 12, and an upper swing assembly 13; the lower swing assembly 12 includes a first lower pressure plate 121, a second lower pressure plate 122, a lower ball head 123, and a lower ratchet hand-tightening bolt 124; the first lower pressure plate 121 is located below the second lower pressure plate 122, the right sides of the first lower pressure plate 121 and the second lower pressure plate 122 are connected to the mounting plate 4 by screws, and the left sides are connected to each other by the lower ratchet hand-tightening bolt 124, the first lower pressure plate 121 and the second lower pressure plate 122 are connected to each other by screws. The second lower pressure plate 122 has a vertical through hole in the middle; the through hole has a rounded chamfer 14, the radius of which is equal to the radius of the lower ball head 123; the lower ball head 123 is located in the first lower pressure plate 121 and the second lower pressure plate 122 through the rounded chamfer 14 of the first lower pressure plate 121 and the second lower pressure plate 122; the support rod 11 is vertically arranged, its lower part passes through the middle of the lower ball head 123 and connects to the lower ball head 123, and its lower end passes downward and extends out of the bottom surface of the mounting plate 4. The lower ball head 123 is connected within the chamfered corner 14 of the first lower pressure plate 121 and the second lower pressure plate 122. Since the radius of the chamfered corner 14 is equal to the radius of the lower ball head 123, when the first lower pressure plate 121 and the second lower pressure plate 122 are not pressing the lower ball head 123, the lower ball head 123 can rotate freely within the chamfered corner 14, allowing the support rod 11 to swing freely within the first lower pressure plate 121 and the second lower pressure plate 122 based on the lower ball head 123. When the first lower pressure plate 121 and the second lower pressure plate 122 press the lower ball head 123, the chamfered corner 14 can press and lock the lower ball head 123, thereby fixing the support rod 11.

[0022] In a further embodiment, threaded holes are provided on both the left and right sides of the top surface of the first lower pressure plate 121 and the second lower pressure plate 122. The top surface of the mounting plate 4 is also provided with corresponding threaded holes on the right side of the top surface of the first lower pressure plate 121 and the second lower pressure plate 122. The first lower pressure plate 121 and the second lower pressure plate 122 are connected to the mounting plate 4 by screwing screws into the threaded holes on the right side of the first lower pressure plate 121 and the second lower pressure plate 122 in sequence. The lower ratchet hand-tightening bolt 124 is screwed into the threaded holes on the left side of the first lower pressure plate 121 and the second lower pressure plate 122 in sequence to connect the first lower pressure plate 121 and the second lower pressure plate 122 to each other.

[0023] In a further implementation, the lower ball head 123 is a spherical shape made of spring manganese steel with a slot on its side. The support rod 11 passes through the lower ball head 123 and is connected to it. When the first lower pressure plate 121 and the second lower pressure plate 122 press the lower ball head 123, the lower ball head 123 shrinks and deforms under compression, thereby firmly clamping the support rod 11.

[0024] The upper swing assembly 13 includes a first upper pressure plate 131, a second upper pressure plate 132, an upper ball head 133, and an upper ratchet hand-tightening bolt 134. The first upper pressure plate 131 and the second upper pressure plate 132 have vertical through holes in their middle sections. The through holes have rounded chamfers 14. The upper ball head 133 is fixedly mounted on the top of the support rod 11. The first upper pressure plate 131 is sleeved on the support rod 11 through its through hole and is located below the upper ball head 133. The second upper pressure plate 132 is located above the upper ball head 133. The left sides of the first upper pressure plate 131 and the second upper pressure plate 132 are connected to each other by the upper ratchet hand-tightening bolt 134. The upper ball head 133 is connected in the arc chamfer 14 of the first upper pressure plate 131 and the second upper pressure plate 132. The radius of the arc chamfer 14 of the first upper pressure plate 131 and the second upper pressure plate 132 is equal to the radius of the upper ball head 133. When the first upper pressure plate 131 and the second upper pressure plate 132 are not pressing the upper ball head 133, the upper ball head 133 can rotate freely in the arc chamfer 14. That is, the first upper pressure plate 131 and the second upper pressure plate 132 can rotate based on the upper ball head 133, so that the armrest mechanism 2 can swing based on the upper ball head 133 through the first upper pressure plate 131 and the second upper pressure plate 132, thereby adjusting the position of the armrest mechanism 2.

[0025] In a further embodiment, the first upper pressure plate 131 and the second upper pressure plate 132 are provided with threaded holes on both the left and right sides. The right sides of the first upper pressure plate 131 and the second upper pressure plate 132 are connected to each other by screws, and the left sides are connected to each other by upper ratchet hand-tightening bolts 134.

[0026] The support rod 11 has a horizontally penetrating locking hole 111 on its bottom side wall below the mounting plate 4; it also includes a locking pin 15; the locking pin 15 passes through the locking hole 111 and connects to the support rod 11. The locking pin 15 limits the support rod 11 to prevent it from coming off upwards.

[0027] In a further embodiment, the locking pin 15 is a glass bead locking pin to prevent the locking pin 15 from falling out of the locking hole 111 and improve stability.

[0028] It also includes a ferrule 16 and a dust cover 17; the ferrule 16 is respectively provided on the top surface of the through hole of the second lower pressure plate 122 and the bottom surface of the through hole of the first upper pressure plate 131; the dust cover 17 is sleeved on the support rod 11, and its two ends are respectively connected to the ferrule 16.

[0029] In a further embodiment, the sleeve 16 is trumpet-shaped, with the larger diameter ends of the two sleeves 16 facing each other. The dust cover 17 can be connected by being snapped onto the sleeves 16 at both ends, without the need for other connecting structures, which is convenient for disassembly and assembly and more aesthetically pleasing.

[0030] It also includes a compression spring 18; the compression spring 18 is sleeved on the support rod 11 and located inside the dust cover 17. The compression spring 18 is used to balance the weight of the upper part of the handrail frame so that the entire handrail frame will not fall down when the ratchet hand-tightening bolt is loosened.

[0031] The handrail assembly 21 includes a lower housing 211, a bracket 212, a main housing 213, an upper housing 214, and a rubber pad 215. The lower housing 211 is horizontally arranged, with a through groove (not shown in the figure) on its bottom surface and an opening 2111 at its right end. The bracket 212 is fixedly installed inside the lower housing 211, with vertical channels 2121 on its left and right sides. The main housing 213 is connected to the top surface of the lower housing 211, and a button panel is provided on the main housing 213, with buttons on the button panel. The upper housing 214 and... The top surface of the main housing 213 is connected; the rubber pad 215 is provided on the top surface of the upper housing 214 to support the driver's arm; the sliding assembly 22 includes a slide rail 221 and a slider 222; the slider 222 is located in the channel 2121 of the bracket 212, and its bottom passes through the through groove on the bottom surface of the lower housing 211. The slider 222 is fixedly connected to the top surface of the second upper pressure plate 132 by screws; the slide rail 221 is horizontally arranged left and right, and is spaced back and forth on both sides of the top surface of the bracket 212, and the slide rail 221 is slidably connected to the upper part of the slider 222. When moving the armrest assembly 21, the armrest assembly 21 can move on the slider 222 via the slide rail 221, thereby adjusting the front and back position of the armrest assembly 21.

[0032] The slider 222 has multiple spaced fixing holes 2221 on its sidewall; the lower housing 211 has a first insertion hole 2112 on its sidewall corresponding to the position of the slider 222; the bracket 212 has a second insertion hole 2122 on its sidewall corresponding to the position of the first insertion hole 2112; it also includes a locking screw 223; the locking screw 223 passes through the first insertion hole 2112 of the lower housing 211 and the second insertion hole 2122 of the bracket 212 and connects to the fixing holes 2221. When the locking screw 223 is loosened, the handrail assembly 21 can move back and forth; when the locking screw 223 is tightened, the locking screw 223 is inserted into the fixing hole 2221 of the slider 222, at which time the handrail assembly 21 is connected to the slider 222, thus fixing the position of the handrail assembly 21.

[0033] The handle mechanism 3 includes a handle body 31, a connecting rod 32, a handle ball head 33, a handle ball head pressure plate 34, and a handle ratchet hand-tightening bolt 35. The connecting rod 32 is horizontally arranged, with one end fixedly connected to the handle body 31 and the other end fixedly connected to the handle ball head 33. The handle ball head 33 has a through hole 331 on its side wall. The handle ball head pressure plate 34 is fixedly arranged on the right end of the bracket 212, with two plates spaced apart front and back. The handle ball head pressure plate 34 has a first threaded connection hole 341 on its side wall. The lower housing 211 has a second threaded connection hole 2113 on its side wall corresponding to the first threaded connection hole 341. The handle ratchet hand-tightening bolt 35 passes through the second threaded connection hole 2113, the rear first threaded connection hole 341, the through hole 331, and the front first threaded connection hole 341 in sequence, so that the two handle ball head pressure plates 34 press the handle ball head 33, connecting the handle ball head 33 between the two handle ball head pressure plates 34. When the ratchet hand screw 35 is loosened, the handle ball head pressure plate 34 releases the handle ball head 33. At this time, the handle body 31 can be swung up and down based on the handle ball head 33 to adjust the position of the handle body 31.

[0034] The working principle of this utility model is as follows: (1) Multi-angle adjustment of the armrest frame: Loosen the lower ratchet hand-tightening bolt 124 so that the first lower pressure plate 121 and the second lower pressure plate 122 no longer press down on the lower ball head 123. At this time, by swinging the armrest mechanism 2 forward, backward, towards the seat, or away from the seat, the support rod 11 swings in the corresponding direction based on the lower ball head 123 on the first lower pressure plate 121 and the second lower pressure plate 122, thereby adjusting the position of the entire armrest frame. After adjustment, tighten the lower ratchet hand-tightening bolt 124 so that the first lower pressure plate 121 and the second lower pressure plate 122 press down on the lower ball head 123. 3. The entire handrail frame can then be fixed. After adjusting the position of the handrail frame, the upper ratchet hand-tightening bolt 134 can be loosened so that the first upper pressure plate 131 and the second upper pressure plate 132 no longer press against the upper ball head 133. At this time, the handrail mechanism 2 can be swung in any direction and angle based on the upper ball head 133 by the first upper pressure plate 131 and the second upper pressure plate 132, thereby adjusting the position of the handrail mechanism 2. After the adjustment is completed, tighten the upper ratchet hand-tightening bolt 134 to press the first upper pressure plate 131 and the second upper pressure plate 132 against the upper ball head 133, thus fixing the handrail mechanism 2.

[0035] (2) Adjustment of the handrail mechanism: Loosen the locking screw 223 so that it is no longer connected to the fixing hole 2221 of the slider 222. Then push the handrail mechanism 2 forward or backward so that the handrail assembly 21 moves based on the slider 222 via the slide rail 221, thereby adjusting the position of the handrail assembly 21. After the adjustment is completed, tighten the locking screw 223 to fix the handrail assembly 21.

[0036] (3) Handle position adjustment: Loosen the handle ratchet hand screw 35 so that the handle ball head pressure plate 34 no longer presses the handle ball head 33. At this time, the handle body 31 can be swung up and down to adjust the position of the handle body 31. After adjustment, tighten the handle ratchet hand screw 35 so that the handle ball head pressure plate 34 presses the handle ball head 33, thus fixing the handle body 31.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-degree-of-freedom adjustable seat armrest frame, comprising an adjustment mechanism, an armrest mechanism, and a handle mechanism mounted on a mounting plate under the seat of a logging vehicle, characterized in that: The adjustment mechanisms are respectively located on the front and rear sides of the mounting plate, and the adjustment mechanisms can swing on the mounting plate; the handrail mechanism includes a handrail assembly and a sliding assembly; the handrail assembly is located on the top surface of the adjustment mechanism through the sliding assembly, and can slide on the adjustment mechanism; the handle mechanism is connected to the handrail mechanism, and the handle mechanism can swing on the handrail mechanism.

2. The multi-degree-of-freedom adjustable seat armrest according to claim 1, characterized in that: The adjustment mechanism includes a support rod, a lower swing assembly, and an upper swing assembly. The lower swing assembly includes a first lower pressure plate, a second lower pressure plate, a lower ball head, and a lower ratchet hand-tightening bolt. The first lower pressure plate is located below the second lower pressure plate. The right sides of the first and second lower pressure plates are connected to the mounting plate, and their left sides are connected to each other via the lower ratchet hand-tightening bolt. A vertical through hole is formed in the middle of the first and second lower pressure plates. The through hole has a rounded chamfer. The lower ball head is located inside the first and second lower pressure plates. The support rod is vertically arranged, with its lower end passing through the lower ball head and extending out of the bottom surface of the mounting plate.

3. The multi-degree-of-freedom adjustable seat armrest according to claim 2, characterized in that: The upper swing assembly includes a first upper pressure plate, a second upper pressure plate, an upper ball head, and an upper ratchet hand-tightening bolt; the first and second upper pressure plates have vertical through holes in their middle sections; the through holes have rounded chamfers; the upper ball head is fixedly mounted on the top of the support rod; the first upper pressure plate is sleeved on the support rod through its through hole and is located below the upper ball head; the second upper pressure plate is located above the upper ball head, and the left sides of the first and second upper pressure plates are connected to each other by the upper ratchet hand-tightening bolt.

4. The multi-degree-of-freedom adjustable seat armrest according to claim 2, characterized in that: The support rod has a horizontal through hole at its bottom; it also includes a locking pin; the locking pin passes through the through hole and connects to the support rod.

5. A multi-degree-of-freedom adjustable seat armrest according to claim 3, characterized in that: It also includes a ferrule and a dust cover; the ferrule is respectively located on the top surface of the through hole of the second lower pressure plate and the bottom surface of the through hole of the first upper pressure plate; the dust cover is fitted onto the support rod, and its two ends are respectively connected to the ferrule.

6. A multi-degree-of-freedom adjustable seat armrest according to claim 5, characterized in that: It also includes a compression spring; the compression spring is sleeved on the support rod and located inside the dust cover.

7. A multi-degree-of-freedom adjustable seat armrest according to claim 3, characterized in that: The handrail assembly includes a lower housing, a bracket, a main housing, an upper housing, and a rubber pad. The lower housing is horizontally positioned with a through groove on its bottom surface and an opening at its right end. The bracket is fixedly installed inside the lower housing, with vertical channels on its left and right sides. The main housing is connected to the top surface of the lower housing. The upper housing is connected to the top surface of the main housing. The rubber pad is located on the top surface of the upper housing. The sliding assembly includes a slide rail and a slider. The slider is located within the channel of the bracket, with its bottom passing through the through groove on the bottom surface of the lower housing and fixedly connected to the top surface of the second upper pressure plate. The slide rail is horizontally positioned left and right and spaced apart on the front and rear sides of the top surface of the bracket, with the slide rail and the upper part of the slider slidably connected.

8. A multi-degree-of-freedom adjustable seat armrest according to claim 7, characterized in that: The slider has multiple fixing holes spaced apart on its front and rear side walls; the bracket and the lower housing side walls have insertion holes corresponding to the fixing holes; it also includes locking screws; the locking screws pass through the insertion holes of the bracket and the lower housing and connect to the fixing holes.

9. A multi-degree-of-freedom adjustable seat armrest according to claim 7, characterized in that: The handle mechanism includes a handle body, a connecting rod, a handle ball head, a handle ball head pressure plate, and a handle ratchet hand-tightening bolt. The connecting rod is horizontally positioned, with one end fixedly connected to the handle body and the other end fixedly connected to the handle ball head. A through hole is provided on the side wall of the handle ball head. The handle ball head pressure plate is fixedly located at the right end of the bracket, with two plates spaced apart. A first threaded connection hole is provided on the side wall of the handle ball head pressure plate. The handle ratchet hand-tightening bolt passes through the first threaded connection hole and the through hole in sequence, causing the two handle ball head pressure plates to press the handle ball head together, connecting the handle ball head between the two handle ball head pressure plates.

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