Structurally improved armrest suspension for automotive seats

Abstract

The utility model relates to a structure improved automobile seat armrest suspension device belongs to automobile seat technical field. Including casing device, end cover, inner toothed plate, dial, rotating shaft and direct damping mechanism, end cover is located in the right side of inner toothed plate and together with inner toothed plate with the right side fixed of casing device, the central position of dial constitutes rotating shaft connecting hole, this rotating shaft connecting hole is connected with the rotating shaft dial connecting part of constituting in the middle part of rotating shaft, and in the right side of dial constitutes a dial spring stopper and a locking toothed plate pivot axle, the left end of rotating shaft stretches to the left side of casing device and is connected with automobile seat armrest under the use state, and the right end stretches to the right side of end cover, direct damping mechanism is located in the right side of end cover and is sleeved in the right end of rotating shaft and with the right side fixed connection of casing device. Advantages: significantly shorten the force chain and improve rigidity, make the structure more stable, significantly improve energy transmission efficiency and damping response speed.

Description

Technical Field

[0001] This utility model belongs to the field of automotive seat technology, specifically relating to an improved automotive seat armrest suspension device. Background Technology

[0002] Based on professional knowledge, the key to the suspension of car seat armrests lies in the locking mechanism. This mechanism is not limited to: gravity self-locking mechanisms, which use components such as gravity balls to automatically lock and unlock the armrest without manual intervention, offering a high degree of intelligence; ratchet and pawl mechanisms, which achieve reliable one-way locking through ratchet engagement, offering strong load-bearing capacity, stable locking, and high safety; and friction damping mechanisms, which generate friction damping through interference fits, achieving stepless suspension and free and smooth angle adjustment. Because friction damping mechanisms achieve an optimal balance between user experience, cost and manufacturing, and design freedom, they are highly valued in the industry. Specifically, the friction damping mechanism features stepless adjustment, smooth and quiet operation, allowing users to hover at any angle. The operation is silky smooth and virtually noiseless, directly reflecting a premium feel. It allows for intuitive operation, with any angle adjustment easily completed with one hand, without the need to find a locking mechanism or perform any additional unlocking steps. It is also convenient for temporarily placing items, as items will not slip off when hovered at an angle. It can meet the comfort needs of passengers at any time, and so on.

[0003] Among the publicly available Chinese patent documents, there is technical information on the structural design of car seat armrests that utilize friction damping mechanisms to achieve suspension. A typical example is the "vehicle seat armrest locking mechanism with suspension function" recommended by CN115716437A. According to the description in paragraph 0037 of the patent specification, it can objectively realize the three technical effects summarized in paragraph 0016 of the specification.

[0004] However, based further on the description in paragraph 0026 of the specification of CN115716437A, it can be seen that its core structure and assembly form adopt a combination of a positioning damping ring, an external gear ring, and an internal gear hole. The aforementioned positioning damping ring, which has teeth forming around its outer wall, is placed on the positioning damping ring mounting section of the rotating shaft, and the positioning damping ring is inserted into the external gear ring (that is, the external gear ring is placed outside the positioning damping ring). The external gear ring is then placed into the internal gear hole of the end cover plate shaft, which is located at the center of the end cover plate, so that the teeth forming around the external gear ring are... The teeth on the wall engage with the internal toothed hole, and the end cover plate, as a static component, prevents the outer gear ring from rotating. Therefore, when the rotating shaft is driven to rotate, the shaft drives the aforementioned positioning damping ring, which is fitted onto the bearing housing of its damping ring. This causes friction between the outer wall of the positioning damping ring and the inner wall of the outer gear ring, generating damping. The damping depends on the magnitude of the frictional force, or coefficient of friction, between the positioning damping ring and the outer gear ring; that is, the effectiveness of the damping is determined by the fit between the teeth on the outer wall of the positioning damping ring and the smooth inner wall of the outer gear ring. As mentioned above, CN115716437A is essentially indirect damping. Indirect damping means that the rotating shaft does not directly interact with the positioning damping ring; rather, the damping relationship is formed by the fit between the positioning damping ring and the outer gear ring.

[0005] The above explanation further reveals that CN115716437A has at least two shortcomings: First, due to indirect damping, the transmission path of the damping force, or locking force, sequentially passes through the rotating shaft, the positioning damping ring, the external gear ring, and the end cover plate. The locking torque needs to pass through three meshing interfaces (such as the positioning damping ring and the rotating shaft, the positioning damping ring and the external gear ring, and the external gear ring and the internal toothed hole of the end cover plate bushing on the end cover plate) to finally achieve the suspension of the handrail. This is a lengthy "force chain" composed of multiple discrete parts connected in series, and each meshing... The presence of minute gaps and elastic deformations in the components will result in loss (consumption) of motion play. For example, the inconsistent expansion coefficients of the positioning damping ring and / or the external gear ring will affect the damping effect. Similarly, wear on the positioning damping ring and / or the external gear ring will also affect the damping effect. Furthermore, if the fit between the rotating shaft and the positioning damping ring causes negative movement of the positioning damping ring, it will also affect the damping effect, and so on. Secondly, the energy transfer efficiency is low and the response speed is slow because the energy path from the rotating shaft, which is the source, to the end point, such as the end cover plate, is long, and the path length tends to be proportional to the energy loss. Utility Model Content

[0006] The objective of this invention is to provide an improved automotive seat armrest suspension device that helps to transform indirect damping in existing technologies into direct damping, thereby enabling the locking torque to be directly transmitted to the end and significantly shortening the force chain and increasing stiffness to achieve a more stable structure; it also helps to shorten the energy path from the rotating shaft as the source to the end, thereby reducing intermediate links and significantly improving energy transfer efficiency and response speed; it significantly simplifies the structure, making it convenient for manufacturing and assembly, saving resources and demonstrating economy; and it facilitates regular or irregular inspection and replacement during use, thereby reducing the workload of maintenance personnel and saving maintenance time.

[0007] The present invention achieves its objective by providing an improved car seat armrest suspension device, comprising a housing, an end cover, an inner toothed plate, a dial, and a rotating shaft. In use, the housing is fixed to the backrest frame of the car seat. The end cover is located on the right side of the inner toothed plate and, together with the inner toothed plate, is fixed to the right side of the housing. The central region of the inner toothed plate has a recessed hole, and an arcuate tooth segment is formed on the wall of this recessed hole. A locking device is positioned corresponding to the recessed hole, engaging or disengaging with the arcuate tooth segment of the inner toothed plate. The locking device also cooperates with the left side of the end cover. The dial corresponds to the inner toothed plate... On the left side, and cooperating with the inner toothed plate, a rotating shaft connecting hole is formed in the center of the dial. This rotating shaft connecting hole connects to the rotating shaft dial connecting part formed in the middle of the rotating shaft. On the right side of the dial, a paddle spring stop and a locking toothed plate pivot shaft are formed. The locking device cooperates with the paddle spring stop and the locking toothed plate pivot shaft. The left end of the rotating shaft extends to the left side of the cover device and is connected to the car seat armrest in the use state, while the right end extends to the right side of the end cover plate. It is characterized by further including a direct damping mechanism, which is located on the right side of the end cover plate and is sleeved on the right end of the rotating shaft and fixedly connected to the right side of the cover device.

[0008] In a specific embodiment of this utility model, the area where the right end of the rotating shaft extends to the right side of the end cover plate constitutes an expansion sleeve mating section, and the direct damping mechanism is sleeved on the expansion sleeve mating section, with the right end of the expansion sleeve mating section protruding to the right side of the direct damping mechanism.

[0009] In another specific embodiment of this utility model, the direct damping mechanism includes a friction damping expansion sleeve and a friction damping expansion sleeve fixing plate. The friction damping expansion sleeve is fitted onto the expansion sleeve mating section. A friction damping expansion sleeve limiting hole with an inner diameter that matches the outer diameter of the friction damping expansion sleeve is opened at the center of the friction damping expansion sleeve fixing plate. The friction damping expansion sleeve fixing plate is fitted onto the friction damping expansion sleeve through the friction damping expansion sleeve limiting hole and limits the friction damping expansion sleeve. The friction damping expansion sleeve fixing plate is fixedly connected to the cover device.

[0010] In another specific embodiment of this utility model, a stress relief groove for breaking the friction damping expansion sleeve into a C-shaped structure is formed on the wall of the friction damping expansion sleeve. A friction damping expansion sleeve anti-rotation limiting flange protruding from the outer wall is formed on the outer wall of the friction damping expansion sleeve. A friction damping expansion sleeve anti-rotation limiting flange mating groove recessed in the surface of the hole wall of the friction damping expansion sleeve limiting hole of the friction damping expansion sleeve fixing plate is formed. The friction damping expansion sleeve anti-rotation limiting flange mates with the friction damping expansion sleeve anti-rotation limiting flange mating groove.

[0011] In another specific embodiment of this utility model, a pair of fixing plate connecting ears are provided on the friction damping expansion sleeve fixing plate and extend around the circumference of the friction damping expansion sleeve fixing plate at a distance of 180° from each other. Each of the pair of fixing plate connecting ears has a fixing plate connecting ear hole. The fixing plate connecting ear is fixedly connected to the cover device by fasteners at the position corresponding to the fixing plate connecting ear hole.

[0012] In another specific embodiment of this utility model, the rotating shaft dial connecting part formed in the middle of the rotating shaft is a spline wheel, and the rotating shaft connecting hole formed in the center of the dial is a spline hole, which cooperates with the spline wheel.

[0013] In a further specific embodiment of this utility model, an end cover plate rotation shaft clearance hole is provided at the center of the end cover plate. A cam protruding from the left side of the end cover plate and surrounding the end cover plate rotation shaft clearance hole is formed on the left side of the end cover plate. This cam has a toothed plate mating boss and a paddle spring mating boss, and a stop extends from the paddle spring mating boss. The right end of the rotation shaft passes through the cover plate rotation shaft clearance hole and extends to the right side of the end cover plate. The locking device includes a locking toothed plate, a locking spring, and a paddle spring. A locking toothed plate pivot shaft hole is formed in the middle of the locking toothed plate, which pivotally engages with the locking toothed plate pivot shaft. An external locking toothed plate tooth is formed on the side of the locking toothed plate facing the inner toothed plate arc tooth section. The locking tooth plate engages with or disengages from the arc-shaped section of the inner tooth plate. A tooth plate mating boss cavity is formed on the side of the locking tooth plate opposite to the outer tooth of the locking tooth plate. This tooth plate mating boss cavity mates with the tooth plate mating boss. A locking tooth plate locking foot is formed at one end of the locking tooth plate. Under the action of the locking spring, the locking tooth plate locking foot engages with the locking tooth plate locking foot groove on the wall of the inner tooth plate clearance hole formed in the inner tooth plate. A paddle spring abutment is formed at the other end of the locking tooth plate. The locking spring is disposed in the inner tooth plate clearance hole. The middle part of the locking spring engages with the locking spring cavity on the wall of the inner tooth plate clearance hole. The two ends of the locking spring correspond to the locking tooth plate locking foot and the stop foot, respectively. One end of the paddle spring is embedded in the paddle spring stop block, and the other end mates with the paddle spring abutment.

[0014] In a further specific embodiment of the present invention, a pair of end cover fixing feet are formed at the edge of the end cover and at a distance of 180° from each other around the circumference of the end cover. The pair of end cover fixing feet are in the shape of a figure 7 and face to the left. A pair of inner tooth plate fixing foot fitting cavities are formed at the edge of the inner tooth plate and at a distance of 180° from each other around the circumference of the inner tooth plate. The pair of inner tooth plate fixing foot fitting cavities correspond to the pair of end cover fixing feet. The pair of end cover fixing feet are fixedly connected to the cover device when they are fitted into the pair of inner tooth plate fixing foot fitting cavities.

[0015] In another specific embodiment of this utility model, a pair of internal tooth plate fixing holes are provided on the internal tooth plate at positions corresponding to the connecting ear holes of the fixing plate; the cover device includes an outer cover and a cover gap-free inner sleeve, a left-facing boss is formed at the center of the left wall of the outer cover, a cover gap-free inner sleeve boss mating hole is formed at the center of the left wall boss, and inner sleeve positioning flange holes are spaced apart on the left wall of the outer cover and around the left wall of the outer cover, and an outer cover skirt is formed at the right edge of the outer cover. The outer casing skirt has spaced-apart outer casing fixing screw holes. The outer casing fixing screws pass sequentially through these holes, the inner toothed plate fixing holes, and the fixing plate connecting lug holes to fix the friction damping expansion sleeve fixing plate and the inner toothed plate to the outer casing skirt. At the edge of the outer casing skirt, corresponding to the position of the pair of end cover fixing feet, a pair of outer casing fixing claw positioning grooves are formed. The pair of end cover fixing feet, in a state of engagement with the inner toothed plate fixing foot fitting cavity, are fixed in these outer casing fixing claw positioning grooves. On the outer casing skirt, and around the four... The outer cover is provided with backrest frame fixing screw holes at intervals. The backrest frame fixing screws fix the outer cover to the backrest frame at positions corresponding to these holes. A gap-free inner sleeve is stacked inside the outer cover cavity. On the left wall of this gap-free inner sleeve, at positions corresponding to the inner sleeve positioning flange holes, there are an equal number of gap-free inner sleeve flanges protruding from the surface of the left wall. These flanges engage with the inner sleeve positioning flange holes. A leftward-facing flange is formed at the center of the left wall of the gap-free inner sleeve. The raised inner sleeve boss of the cover has a shaft hole at its center. The inner sleeve boss is fitted with the inner sleeve boss mating hole. A inner sleeve limiting block extends on the left wall of the inner sleeve and mates with the inner sleeve limiting block hole formed on the left wall of the outer cover. The left end of the rotating shaft extends through the inner sleeve shaft hole to the left side of the outer cover, and the middle part of the rotating shaft forms a rotating pair with the hole wall of the inner sleeve shaft hole. The dial is located inside the inner sleeve cavity of the inner sleeve.

[0016] In another specific embodiment of this utility model, the inner sleeve shaft hole of the cover is concentric with the mating hole of the inner sleeve boss of the cover, and a set of rotating shaft guide blocks are formed at intervals around the circumferential direction of the hole wall of the inner sleeve shaft hole of the cover to reduce the frictional force on the middle part of the rotating shaft. The middle part of the rotating shaft and the set of rotating shaft guide blocks form a rotating pair; the side of the set of rotating shaft guide blocks facing the inner sleeve shaft hole of the cover is formed as a concave arc surface.

[0017] The technical advantages of the present invention are as follows: Because a direct damping mechanism, fixedly connected to the cover device, is added to the right side of the end cover and at the right end of the rotating shaft, a damping relationship is directly generated between the rotating shaft and the direct damping mechanism. This allows the locking torque to be directly transmitted to the end, significantly shortening the force chain and increasing stiffness, thus making the structure more stable. It also helps to shorten the energy path from the rotating shaft (the source) to the end, reducing intermediate links and significantly improving energy transfer efficiency and damping response speed. Compared to existing technologies, the structure is significantly simplified, making manufacturing and assembly convenient, saving resources, and demonstrating economic efficiency. Since the direct damping mechanism is located on the right side of the end cover, which is the end component, there is no need to disassemble other components during maintenance, reducing the workload and intensity of maintenance personnel, saving time, and improving maintenance efficiency. Attached Figure Description

[0018] Figure 1 This is a structural diagram of an embodiment of the present utility model; Figure 2 for Figure 1 The structural diagram observed after the right end is rotated forward at an angle; Figure 3 for Figure 1 and Figure 2 The detailed structural diagram of the enclosure device is shown.

[0019] In the diagram: 1. Cover assembly; 11. Outer cover; 111. Left wall of outer cover; 1111. Boss on the left wall of outer cover; 1112. Positioning flange hole of inner sleeve; 1113. Mating hole of boss on inner sleeve of cover with backlash elimination; 1114. Hole of limiting block on inner sleeve of cover with backlash elimination; 113. Skirt of outer cover; 1131. Fixing screw hole of outer cover; 1132. Positioning groove of fixing claw of outer cover; 1133. Fixing screw hole of chair back frame; 114. Outer cover cavity; 12. Backlash elimination inner sleeve of cover; 121. Flange of backlash elimination inner sleeve of cover; 122. Boss of backlash elimination inner sleeve of cover; 1221. Shaft hole of backlash elimination inner sleeve of cover; 12211. Rotating shaft guide block; 123. Limiting block of inner sleeve of backlash elimination; 2. End cover plate; 21. 211. End cover plate rotating shaft clearance hole; 2111. Cam; 2111. Tooth plate mating boss; 2112. Paddle spring mating boss; 21121. Stop foot; 22. End cover plate fixing foot; 3. Inner tooth plate; 31. Inner tooth plate clearance hole; 311. Inner tooth plate arc tooth section; 312. Locking spring cavity; 313. Locking tooth plate locking foot groove; 32. Locking device; 321. Locking tooth plate; 3211. Locking tooth plate pivot shaft hole; 3212. Locking tooth plate outer tooth; 3213. Tooth plate mating boss cavity; 3214. Locking tooth plate locking foot; 3215. Paddle spring stop part; 322. Locking spring; 323. Paddle spring; 33. Inner tooth plate fixing foot cavity; 34. Inner tooth plate fixing hole; 4. 41. Rotating shaft connecting hole; 42. Paddle spring stop; 43. Locking tooth plate pivot shaft; 5. Rotating shaft; 51. Rotating shaft dial connecting part; 52. Expansion sleeve mating section; 6. Direct damping mechanism; 61. Friction damping expansion sleeve; 611. Expansion sleeve stress relief groove; 612. Friction damping expansion sleeve anti-rotation limiting flange; 62. Friction damping expansion sleeve fixing plate; 621. Friction damping expansion sleeve limiting hole; 6211. Friction damping expansion sleeve anti-rotation limiting flange mating groove; 622. Fixing plate connecting ear; 6221. Fixing plate connecting ear hole. Detailed Implementation

[0020] In order to better understand the technical essence and beneficial effects of this utility model, the applicant provides a detailed description below by way of embodiments. However, the description of the embodiments is not intended to limit the solution of this utility model. Any formal but not substantive equivalent transformations made based on the concept of this utility model should be considered within the scope of the technical solution of this utility model.

[0021] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on... Figure 1The current position is used as an example and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0022] Please see Figure 1 and Figure 2 The diagram shows a housing device 1, an end cover plate 2, an internal gear plate 3, a dial 4, and a rotating shaft 5. The housing device 1 is fixed to the backrest frame of a car seat in use. The end cover plate 2 is located on the right side of the internal gear plate 3 and is fixed to the right side of the housing device 1 along with the internal gear plate 3. The central region of the internal gear plate 3 forms an internal gear plate clearance hole 31. An internal gear plate arc tooth segment 311 is formed on the hole wall of the clearance hole 31. A locking device 32 is provided at a position corresponding to the internal gear plate clearance hole 31. This locking device 32 engages with or disengages from the aforementioned internal gear plate arc tooth segment 311 and locks... The device 32 also mates with the left side of the end cover plate 2. The dial 4 corresponds to the left side of the inner toothed plate 3 and mates with the inner toothed plate 3. A rotating shaft connecting hole 41 is formed in the center of the dial 4. The rotating shaft connecting hole 41 is connected to the rotating shaft dial connecting part 51 formed in the middle of the rotating shaft 5. A paddle spring stop 42 and a locking toothed plate pivot shaft 43 are formed on the right side of the dial 4. The aforementioned locking device 32 mates with the paddle spring stop 42 and the locking toothed plate pivot shaft 43. The left end of the rotating shaft 5 extends to the left side of the cover device 1, and the right end extends to the right side of the aforementioned end cover plate 2. Figure 1 The diagram shows a rotating shaft armrest connection hole located at the axial center of the left end of the rotating shaft 5, which is parallel to the rotating shaft 5. The left end of the rotating shaft 5 is connected to the car seat armrest by means of a pin or similar component at the position corresponding to the aforementioned rotating shaft armrest connection hole. Alternatively, it can be described as connecting the car seat armrest to the left end of the rotating shaft 5.

[0023] The key technical point of the technical solution provided by this utility model is that the structure of the aforementioned car seat armrest suspension device also includes a direct damping mechanism 6, which is located on the right side of the aforementioned end cover plate 2 and is sleeved on the right end of the aforementioned rotating shaft 5 and fixedly connected to the right side of the aforementioned cover device 1.

[0024] The area where the right end of the aforementioned rotating shaft 5 extends to the right side of the aforementioned end cover plate 2 constitutes an expansion sleeve mating section 52. The aforementioned direct damping mechanism 6 is fitted onto the expansion sleeve mating section 52, and the right end of the expansion sleeve mating section 52 protrudes to the right side of the direct damping mechanism 6.

[0025] Depend on Figure 1 and Figure 2As shown, the aforementioned direct damping mechanism 6 includes a friction damping expansion sleeve 61 and a friction damping expansion sleeve fixing plate 62. The friction damping expansion sleeve 61 is fitted onto the aforementioned expansion sleeve mating section 52. A friction damping expansion sleeve limiting hole 621 with an inner diameter that matches the outer diameter of the friction damping expansion sleeve 61 is opened at the center of the friction damping expansion sleeve fixing plate 62. The friction damping expansion sleeve fixing plate 62 is fitted onto the friction damping expansion sleeve 61 through the friction damping expansion sleeve limiting hole 621 and limits the friction damping expansion sleeve 61. The friction damping expansion sleeve fixing plate 62 is fixedly connected to the right side of the aforementioned cover device 1.

[0026] A stress relief groove 611 for breaking the friction damping expansion sleeve 61 into a C-shaped structure is formed on the wall of the aforementioned friction damping expansion sleeve 61. A friction damping expansion sleeve anti-rotation limiting flange 612 protruding from the outer wall is formed on the outer wall of the friction damping expansion sleeve 61. A friction damping expansion sleeve anti-rotation limiting flange mating groove 6211 recessed into the surface of the hole wall of the aforementioned friction damping expansion sleeve fixing plate 62 is formed on the hole wall of the friction damping expansion sleeve limiting hole 621. The friction damping expansion sleeve anti-rotation limiting flange 612 mates with the friction damping expansion sleeve anti-rotation limiting flange mating groove 6211.

[0027] On the aforementioned friction damping expansion sleeve fixing plate 62, and extending around the circumference of the friction damping expansion sleeve fixing plate 62 at a distance of 180° from each other, there is a pair of fixing plate connecting ears 622. Each of the pair of fixing plate connecting ears 622 has a fixing plate connecting ear hole 6221. The fixing plate connecting ears 622 are fixedly connected to the aforementioned cover device 1 by fasteners at the positions corresponding to the fixing plate connecting ear holes 6221.

[0028] In this embodiment, the rotating shaft dial connecting part 51, which is located in the middle of the aforementioned rotating shaft 5, is constructed as a spline wheel or spline gear. Correspondingly, the rotating shaft connecting hole 41, located in the center of the aforementioned dial 4, is a spline hole, which mates with the aforementioned spline wheel. Of course, it is also possible to modify the spline wheel on the aforementioned rotating shaft 5, which is integral with the rotating shaft 6, by milling a flat surface to form a square, pentagon, or regular hexagon with equal side lengths, and to adaptably modify the aforementioned rotating shaft connecting hole 41 to a square hole, pentagonal hole, or regular hexagonal hole. Therefore, the change in the connection method between the rotating shaft 5 and the rotating shaft connecting hole 41 should not be considered as deviating from the scope of the technical content disclosed in this utility model.

[0029] See you later Figure 1 and Figure 2An end cover plate rotation shaft clearance hole 21 is provided at the center of the aforementioned end cover plate 2. A cam 211 protruding from the left side of the end cover plate 2 and surrounding the end cover plate rotation shaft clearance hole 21 is formed on the left side of the end cover plate 2. The cam 211 has a toothed plate mating boss 2111 and a paddle spring mating boss 2112. A stop 21121 extends from the paddle spring mating boss 2112. The right end of the aforementioned rotation shaft 5 extends through the aforementioned end cover plate rotation shaft clearance hole 21. To the right side of the end cover plate 2; the aforementioned locking device 32 includes a locking tooth plate 321, a locking spring 322, and a paddle spring 323. A locking tooth plate pivot hole 3211 is formed in the middle of the locking tooth plate 321. The locking tooth plate pivot hole 3211 is pivotally engaged with the aforementioned locking tooth plate pivot shaft 43. Furthermore, a locking tooth plate outer tooth 3212 is formed on the side of the locking tooth plate 321 facing the aforementioned inner tooth plate arc tooth section 311. The locking tooth plate outer tooth 3212 meshes with the inner tooth plate arc tooth section 311. Upon disengagement, a toothed plate mating boss cavity 3213 is formed on the side of the locking toothed plate 321 opposite to the outer tooth 3212 of the locking toothed plate. This toothed plate mating boss cavity 3213 mates with the aforementioned toothed plate mating boss 2111. A locking toothed plate locking foot 3214 is formed at one end of the locking toothed plate 321. Under the action of the aforementioned locking spring 322, the locking toothed plate locking foot 3214 engages with the locking toothed plate locking foot groove 313 on the hole wall of the inner toothed plate clearance hole 31 of the aforementioned inner toothed plate 3. The other end of plate 321 is provided with a paddle spring stop 3215. Locking spring 322 is provided in the aforementioned inner tooth plate relief hole 31. The middle part of the locking spring 322 is fitted with the locking spring cavity 312 formed on the hole wall of the inner tooth plate relief hole 31. The two ends of the locking spring 322 correspond to the locking tooth plate locking foot 3214 and the aforementioned stop foot 21121, respectively. One end of the paddle spring 323 is fitted on the aforementioned paddle spring stop 42, and the other end cooperates with the aforementioned paddle spring stop 3215.

[0030] A pair of end cover fixing feet 22 are formed at the edge of the aforementioned end cover plate 2 and at a distance of 180° from each other in the circumferential direction of the end cover plate 2. The pair of end cover fixing feet 22 are shaped like the number 7 and face to the left. A pair of inner tooth plate fixing foot fitting cavities 33 are formed at the edge of the aforementioned inner tooth plate 3 and at a distance of 180° from each other in the circumferential direction of the inner tooth plate 3. The pair of inner tooth plate fixing foot fitting cavities 33 correspond to the pair of end cover fixing feet 22. The pair of end cover fixing feet 22 are fixedly connected to the aforementioned cover device 1 when they are fitted with the pair of inner tooth plate fixing foot fitting cavities 33. The aforementioned dial 4 is positioned along with the positioning of the inner tooth plate 3.

[0031] Please see Figure 3 And combined Figure 1 and Figure 2 A pair of internal toothed plate fixing holes 34 are provided on the aforementioned internal toothed plate 3 at positions corresponding to the aforementioned fixing plate connecting ear holes 6221; the aforementioned cover device 1 includes an outer cover 11 and a cover gap-free inner sleeve 12. A left-protruding outer cover left wall boss 1111 is formed at the center of the outer cover left wall 111 of the outer cover 11. A cover gap-free inner sleeve boss mating hole 1113 is formed at the center of the outer cover left wall boss 1111. Inner sleeve positioning flange holes 1112 are spaced apart on the outer cover left wall 111 and around the outer cover left wall 111. An outer cover skirt 113 is formed on the right edge of the outer cover 11, and spaced apart on the outer cover skirt 113. The outer casing fixing screw hole 1131 is used to fix the aforementioned friction damping expansion sleeve fixing plate 62 and inner toothed plate 3 to the outer casing skirt 113 of the outer casing 11 by passing the outer casing fixing screw through the outer casing fixing screw hole 1131, the inner toothed plate fixing hole 34, and the fixing plate connecting ear hole 6221 in sequence. At the edge of the outer casing skirt 113, and at the position corresponding to the aforementioned pair of end cover fixing feet 22, a pair of outer casing fixing claw positioning grooves 1132 are formed. The pair of end cover fixing feet 22 are engaged with the aforementioned inner toothed plate fixing foot fitting cavity 33 and are fixed in the outer casing fixing claw positioning grooves 1132. On the outer casing skirt 113 and around the outer casing skirt 113, there are also spaced-out grooves. The backrest frame is provided with fixing screw holes 1133. The outer cover 11 is fixed to the backrest frame by the fixing screws at the positions corresponding to the fixing screw holes 1133. The inner sleeve 12 is stacked in the outer cover cavity 114 of the outer cover 11. On the left wall of the inner sleeve 12, and at the position corresponding to the inner sleeve positioning flange hole 1112, there are an equal number of inner sleeve flanges 121 that protrude from the surface of the left wall of the inner sleeve 12. The inner sleeve flanges 121 are inserted into the inner sleeve positioning flange hole 1112. A leftward protrusion is formed at the center of the left wall of the inner sleeve 12. The inner sleeve boss 122 has a shaft hole 1221 at its center. The inner sleeve boss 122 is fitted with the inner sleeve boss mating hole 1113. A inner sleeve limiting block 123 extends on the left wall of the inner sleeve 12 and is fitted with the inner sleeve limiting block hole 1114 formed on the left wall 111 of the outer cover 11. The left end of the aforementioned rotating shaft 5 extends to the left side of the outer cover 11 through the aforementioned inner sleeve shaft hole 1221. The middle part of the rotating shaft 5 forms a rotating pair with the hole wall of the inner sleeve shaft hole 1221. The aforementioned dial 4 is located in the inner sleeve cavity of the inner sleeve 12.

[0032] The aforementioned housing gap-free inner sleeve shaft hole 1221 is concentric with the aforementioned housing gap-free inner sleeve boss mating hole 1113, and a set of rotating shaft guide blocks 12211 are formed at intervals around the circumference of the hole wall of the housing gap-free inner sleeve shaft hole 1221 to reduce the frictional force on the middle part of the aforementioned rotating shaft 5. The middle part of the rotating shaft 5 and the set of rotating shaft guide blocks 12211 form a rotating pair; the side of the aforementioned set of rotating shaft guide blocks 12211 facing the housing gap-free inner sleeve shaft hole 1221 is formed as a concave arc surface.

[0033] The applicant briefly describes the working principle of this utility model. The car seat armrest suspension device of this utility model is fixed to the side of the car seat via the aforementioned cover device 1, i.e., installed on the side of the car seat frame. The part of the rotating shaft 5 extending to the right side of the friction damping expansion sleeve fixing plate 62 is the connection end for connecting the rotating shaft 5 to the armrest. When the armrest is rotated upwards to a desired position, such as placing the armrest in a vertical position... During the aforementioned process, the handrail drives the rotating shaft 5 to rotate accordingly. Under the action of the locking spring 322, the locking tooth plate locking foot 3214 of the aforementioned locking device 32 is fitted into the locking tooth plate locking foot groove 313 formed on the hole wall of the inner tooth plate clearance hole 31. Slight external forces, such as vehicle vibration or unintentional collisions by passengers, are insufficient to disengage the locking tooth plate locking foot 3214 from the locking tooth plate locking foot groove 313, thereby ensuring that the handrail is in a locked state. When the passenger needs to lower the handrail, by forcefully pulling the handrail downward, the locking tooth plate locking foot 3214 is disengaged from the locking tooth plate locking foot groove 313. As the handrail rotates downward into the adjustable angle range, the handrail can be reliably and permanently suspended by the damping force between the inner wall of the friction damping expansion sleeve 61 and the expansion sleeve mating section 52 of the direct damping mechanism 6 structural system.

[0034] Since the working mechanism of the locking tooth plate 321, locking spring 322 and paddle spring 323 of the locking device 32 in other cases of handrail adjustment of this utility model is similar to the description in paragraph 0037 of the specification of Chinese Patent Publication No. CN115716437A (only the form of the figure reference has been changed), the applicant will not repeat it here.

[0035] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. An improved car seat armrest suspension device, comprising a housing device (1), an end cover plate (2), an inner toothed plate (3), a dial (4), and a rotating shaft (5), wherein the housing device (1) is fixed to the backrest frame of the car seat in use, the end cover plate (2) is located on the right side of the inner toothed plate (3) and is fixed together with the inner toothed plate (3) to the right side of the housing device (1), the central region of the inner toothed plate (3) is provided with an inner toothed plate clearance hole (31), an inner toothed plate arc tooth segment (311) is provided on the hole wall of the inner toothed plate clearance hole (31), and a locking device (32) is provided at the position corresponding to the inner toothed plate clearance hole (31), the locking device (32) engaging or disengaging with the inner toothed plate arc tooth segment (311), and the locking device ( 32) It also cooperates with the left side of the end cover plate (2), the dial (4) corresponds to the left side of the inner tooth plate (3) and cooperates with the inner tooth plate (3), a rotating shaft connecting hole (41) is formed in the center of the dial (4), the rotating shaft connecting hole (41) is connected to the rotating shaft dial connecting part (51) formed in the middle of the rotating shaft (5), and a paddle spring stop (42) and a locking tooth plate pivot shaft (43) are formed on the right side of the dial (4), the locking device (32) cooperates with the paddle spring stop (42) and the locking tooth plate pivot shaft (43), the left end of the rotating shaft (5) extends to the left side of the cover device (1) and is connected to the car seat armrest in the use state, while the right end extends to the right side of the end cover plate (2), characterized in that: It also includes a direct damping mechanism (6), which is located on the right side of the end cover plate (2) and sleeved on the right end of the rotating shaft (5) and fixedly connected to the right side of the cover device (1).

2. The structurally improved automobile seat armrest suspension device according to claim 1, characterized in that: The area where the right end of the rotating shaft (5) extends to the right side of the end cover plate (2) forms an expansion sleeve fitting section (52), and the direct damping mechanism (6) is fitted on the expansion sleeve fitting section (52), with the right end of the expansion sleeve fitting section (52) protruding from the right side of the direct damping mechanism (6).

3. The structurally improved automobile seat armrest suspension device according to claim 2, characterized in that: The direct damping mechanism (6) includes a friction damping expansion sleeve (61) and a friction damping expansion sleeve fixing plate (62). The friction damping expansion sleeve (61) is fitted onto the expansion sleeve mating section (52). A friction damping expansion sleeve limiting hole (621) with an inner diameter that matches the outer diameter of the friction damping expansion sleeve (61) is opened at the center of the friction damping expansion sleeve fixing plate (62). The friction damping expansion sleeve fixing plate (62) is fitted onto the friction damping expansion sleeve (61) through the friction damping expansion sleeve limiting hole (621) and limits the friction damping expansion sleeve (61). The friction damping expansion sleeve fixing plate (62) is fixedly connected to the cover device (1).

4. The structurally improved automobile seat armrest suspension device according to claim 3, characterized in that: A stress relief groove (611) for breaking the friction damping expansion sleeve (61) into a C-shaped structure is formed on the wall of the friction damping expansion sleeve (61). A friction damping expansion sleeve anti-rotation limiting flange (612) protruding from the outer wall is formed on the outer wall of the friction damping expansion sleeve (61). A friction damping expansion sleeve anti-rotation limiting flange mating groove (6211) recessed into the surface of the hole wall of the friction damping expansion sleeve limiting hole (621) of the friction damping expansion sleeve fixing plate (62) is formed. The friction damping expansion sleeve anti-rotation limiting flange (612) mates with the friction damping expansion sleeve anti-rotation limiting flange mating groove (6211).

5. The structurally improved automobile seat armrest suspension device according to claim 4, characterized in that: A pair of fixing plate connecting ears (622) are provided on the friction damping expansion sleeve fixing plate (62) and extend around the circumference of the friction damping expansion sleeve fixing plate (62) at a distance of 180° from each other. Each of the pair of fixing plate connecting ears (622) has a fixing plate connecting ear hole (6221). The fixing plate connecting ear (622) is fixedly connected to the cover device (1) by fasteners at the positions corresponding to the fixing plate connecting ear hole (6221).

6. The structurally improved automobile seat armrest suspension device according to claim 1, characterized in that: The rotating shaft dial connecting part (51) located in the middle of the rotating shaft (5) is a spline wheel, and the rotating shaft connecting hole (41) located in the center of the dial (4) is a spline hole, which is engaged with the spline wheel.

7. The structurally improved automobile seat armrest suspension device according to claim 1, characterized in that: An end cover plate rotation shaft clearance hole (21) is provided at the center of the end cover plate (2). On the left side of the end cover plate (2) and around the end cover plate rotation shaft clearance hole (21), a cam (211) protruding from the left side of the end cover plate (2) is formed. The cam (211) has a toothed plate mating boss (2111) and a paddle spring mating boss (2112). A stop (21121) extends from the paddle spring mating boss (2112). The right end of the rotation shaft (5) passes through the end cover plate rotation shaft clearance hole (21) and extends to... On the right side of the end cover (2); the locking device (32) includes a locking tooth plate (321), a locking spring (322) and a paddle spring (323). A locking tooth plate pivot hole (3211) is formed in the middle of the locking tooth plate (321), which pivotally engages with the locking tooth plate pivot shaft (43). On the side of the locking tooth plate (321) facing the inner tooth plate arc tooth section (311), a locking tooth plate outer tooth (3212) is formed, which meshes with the inner tooth plate arc tooth section (311). Alternatively, the engagement can be disengaged. A toothed plate mating boss cavity (3213) is formed on the side of the locking toothed plate (321) opposite to the outer tooth (3212) of the locking toothed plate. This toothed plate mating boss cavity (3213) mates with the toothed plate mating boss (2111). A locking toothed plate locking foot (3214) is formed at one end of the locking toothed plate (321). Under the action of the locking spring (322), the locking toothed plate locking foot (3214) engages with the locking toothed plate locking foot groove (313) on the hole wall of the inner toothed plate clearance hole (31) of the inner toothed plate (3). (321) has a paddle spring stop (3215) at the other end. The locking spring (322) is disposed in the inner tooth plate relief hole (31). The middle part of the locking spring (322) is fitted with the locking spring cavity (312) formed on the hole wall of the inner tooth plate relief hole (31). The two ends of the locking spring (322) correspond to the locking tooth plate locking foot (3214) and the stop foot (21121) respectively. One end of the paddle spring (323) is embedded in the paddle spring stop (42), and the other end cooperates with the paddle spring stop (3215).

8. The structurally improved automobile seat armrest suspension device according to claim 5, characterized in that: A pair of end cover fixing feet (22) are formed at the edge of the end cover (2) and around the circumference of the end cover (2) at a distance of 180° from each other. The pair of end cover fixing feet (22) are in the shape of a figure 7 and face to the left. A pair of inner tooth plate fixing foot fitting cavities (33) are formed at the edge of the inner tooth plate (3) and around the circumference of the inner tooth plate (3) at a distance of 180° from each other. The pair of inner tooth plate fixing foot fitting cavities (33) correspond to the pair of end cover fixing feet (22). The pair of end cover fixing feet (22) are fixedly connected to the cover device (1) in the state of fitting with the pair of inner tooth plate fixing foot fitting cavities (33).

9. The structurally improved automobile seat armrest suspension device according to claim 8, characterized in that: A pair of internal tooth plate fixing holes (34) are provided on the internal tooth plate (3) at positions corresponding to the connecting ear holes (6221) of the fixing plate;The housing device (1) includes an outer housing (11) and a housing gap-free inner sleeve (12). A left-protruding boss (1111) is formed at the center of the left wall (111) of the outer housing (11). A housing gap-free inner sleeve boss mating hole (1113) is formed at the center of the left wall (111). Inner sleeve positioning flange holes (1112) are spaced apart on the left wall (111) and around its perimeter. An outer housing skirt (113) is formed on the right edge of the outer housing (11). Outer housing fixing screw holes (1131) are spaced apart on the outer housing skirt (113), through which outer housing fixing screws pass sequentially. The friction damping expansion sleeve fixing plate (62) and the inner toothed plate (3) are fixed to the outer shell skirt (113) of the outer shell (11) through the shell fixing screw hole (1131), the inner toothed plate fixing hole (34) and the fixing plate connecting ear hole (6221). A pair of outer shell fixing claw positioning grooves (1132) are formed on the edge of the outer shell skirt (113) and at the position corresponding to the pair of end cover fixing feet (22). The pair of end cover fixing feet (22) are fixed to the pair of outer shell fixing claw positioning grooves (1132) when they are engaged with the inner toothed plate fixing foot fitting cavity (33). A chair back frame fixing is also provided on the outer shell skirt (113) and around the outer shell skirt (113) at intervals. Screw holes (1133) are used to fix the outer shell (11) to the backrest frame by the backrest frame fixing screws at the positions corresponding to the backrest frame fixing screw holes (1133). The backrest frame gap-free inner sleeve (12) is stacked in the outer shell cavity (114) of the outer shell (11). On the left wall of the backrest frame gap-free inner sleeve (12) and at the position corresponding to the inner sleeve positioning flange hole (1112), there are a number of backrest frame gap-free inner sleeve flanges (121) that are equal to the number of inner sleeve positioning flange holes (1112) and protrude from the surface of the left wall of the backrest frame gap-free inner sleeve (12). The backrest frame gap-free inner sleeve flanges (121) are inserted into the inner sleeve positioning flange holes (1112). A gap-free inner sleeve flange is formed at the center of the left wall of the backrest frame gap-free inner sleeve (12). A left-protruding inner sleeve boss (122) with a gap-free inner sleeve shaft hole (1221) is formed in the center of the inner sleeve boss (122). The inner sleeve boss (122) is inserted into the inner sleeve boss mating hole (1113). A inner sleeve limiting block (123) is extended on the left wall of the inner sleeve (12) for mating with the inner sleeve limiting block hole (1114) formed on the left wall of the outer cover (11). The left end of the rotating shaft (5) extends to the left side of the outer cover (11) through the inner sleeve shaft hole (1221). The middle part of the rotating shaft (5) and the hole wall of the inner sleeve shaft hole (1221) form a rotating pair.The dial (4) is located within the cavity of the gap-free inner sleeve of the housing (12).

10. The structurally improved automobile seat armrest suspension device according to claim 9, characterized in that: The housing gap-free inner sleeve shaft hole (1221) is concentric with the housing gap-free inner sleeve boss mating hole (1113), and a set of rotating shaft guide blocks (12211) are formed at intervals around the circumference of the hole wall of the housing gap-free inner sleeve shaft hole (1221) to reduce the frictional force on the middle part of the rotating shaft (5). The middle part of the rotating shaft (5) and the set of rotating shaft guide blocks (12211) form a rotating pair; the side of the set of rotating shaft guide blocks (12211) facing the housing gap-free inner sleeve shaft hole (1221) is formed as a concave arc surface.

Images