Portable electric armrest and automobile seat

Abstract

The utility model belongs to the technical field of automobile parts, and provides a portable electric armrest and an automobile seat. The armrest body is provided with a telescopic shaft, and the telescopic shaft is movably arranged on the mounting framework; the shaft sleeve is arranged on the mounting framework, a bearing frame and a plurality of balls are embedded in the shaft sleeve, and the balls are distributed on the inner wall of the bearing frame and movably make contact with the telescopic shaft. Compared with the prior art, the utility model has the advantages that the structure that the balls and the bearing bracket are embedded in the shaft sleeve is designed, so that the telescopic shaft is in movable contact with the balls, the shaft sleeve is used for effectively limiting the axial shaking in the telescopic process, and the balls and the bearing bracket are used for inhibiting the radial swinging generated during angle adjustment through the radial supporting capability; the two structures supplement each other, the shaking amount of the armrest body in the extending and rotating processes is perfectly reduced, the safety and the structural reliability are improved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically relating to a convenient electric handrail and a car seat. Background Technology

[0002] Traditional car seat armrests mainly come in two forms: one is mounted on the side of the seat back and can be manually rotated forward, and the other is fixed to both sides of the seat. These traditional forms are functionally limited, inconvenient to use, and cannot meet the increasingly diverse needs of in-car environments.

[0003] To improve ease of use, some high-end seats have begun to incorporate electric armrests in recent years. For example, Chinese Patent No. CN222040298U discloses a drive mechanism for an armrest and a car seat. The drive mechanism includes: a mounting base and a drive component, the drive component having a first resting position and a second resting position; an armrest drive shaft and a limiting module, movably mounted on the mounting base, the armrest being connectable to the armrest drive shaft; the drive component can drive the armrest drive shaft to extend and retract; when the drive component is in the first resting position, the limiting module restricts the rotation of the armrest drive shaft; when the drive component moves from the first resting position to the second resting position, the drive component drives the armrest drive shaft to extend outward relative to the mounting base; when the drive component moves to the second resting position, the limiting module releases the rotation restriction on the drive shaft; when the drive component moves from the second resting position to the first resting position, the drive component drives the armrest drive shaft to retract towards the mounting base.

[0004] In summary, while existing handrails achieve automation, they often neglect structural stability and dynamic precision control during movement. Specifically, the electric handrails in this comparative document often rely on limit module structures during extension and rotation. These limit modules, on the one hand, employ numerous components, making them complex and unsuitable for mass production, while also complicating subsequent maintenance. On the other hand, the guide gaps created by the single guide structure exacerbate the swaying of the handrail body during axial extension and rotation, ultimately causing unstable operation and even abnormal noises, severely impacting user experience and product lifespan. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a convenient electric handrail and car seat with a simple structure, good stability, and zero clearance in the axial and radial movements of the handrail body.

[0006] The objective of this utility model can be achieved by addressing the following technical problem: providing a convenient electric handrail, including: installing a frame;

[0007] The handrail body is equipped with a telescopic shaft, which is movably mounted on the mounting frame.

[0008] A drive mechanism is provided on the mounting frame, and the output end of the drive mechanism is connected to the telescopic shaft, which is used to drive the telescopic shaft to move relative to the mounting frame along its axial direction, so as to realize the extension and retraction of the handrail body.

[0009] A locking mechanism is provided in the handrail body, and the locking mechanism is used to limit the rotation angle of the handrail body relative to the mounting frame;

[0010] A bushing is provided on the mounting frame. The bushing contains a bearing bracket and several balls. The balls are distributed on the inner wall of the bearing bracket and are in movable contact with the telescopic shaft. The bushing, together with the balls, is used to limit the axial wobble generated when the handrail body is extended or retracted, as well as the radial wobble generated when the handrail body is adjusted in angle.

[0011] In the aforementioned portable electric handrail, the drive mechanism includes a drive component and a lead screw. The drive component is mounted on the mounting frame, and the output end of the drive component is connected to the lead screw. The length direction of the lead screw is coaxial with the extension and retraction direction of the handrail body. A movable block is connected to the end of the extension shaft, and the movable block is movably connected to the lead screw.

[0012] In one of the aforementioned portable electric handrails, an infrared switch is also provided on the mounting frame. The infrared switch is used to determine the position state of the handrail body after the angle is adjusted.

[0013] In the aforementioned convenient electric handrail, a connecting sleeve and a connecting hole are formed on the movable block, and a locking hole is provided at the end of the telescopic shaft. The connecting sleeve is synchronously connected to the lead screw along with the movable block. When the connecting hole and the locking hole are aligned and connected, fasteners can pass through to fix the movable block and the telescopic shaft together.

[0014] In one of the aforementioned convenient electric handrails, an assembly plate is connected to the outer wall of the bushing, and the assembly plate is connected to the mounting frame to limit the displacement of the bushing, the bearing bracket, and the balls.

[0015] In the aforementioned convenient electric handrail, a guide rod is also connected to the mounting frame, and an anti-detachment groove is provided on the assembly plate. The guide rod extends into the anti-detachment groove, and the moving block is movably engaged with the guide rod.

[0016] In one of the aforementioned convenient electric handrails, the movable block is also provided with a locking groove, which is movably engaged with the guide rod.

[0017] In one of the aforementioned portable electric handrails, at least two limit switches are also provided on the mounting frame, which are used to detect the extension and retraction length of the telescopic shaft.

[0018] In one of the aforementioned portable electric handrails, the locking mechanism includes a ratchet and a locking block built into the handrail body to achieve angle adjustment of the handrail body.

[0019] The technical solution adopted by this utility model to solve its technical problem is to also propose an automobile seat, including one of the above-mentioned convenient electric armrests.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) This utility model provides a convenient electric handrail and car seat. By embedding the locking mechanism inside the handrail body, the use of parts is saved and the manufacturing cost is reduced. At the same time, the design of the bushing with embedded balls and bearing brackets allows the telescopic shaft to make active contact with several balls. The bushing effectively restricts the axial sway during the extension and retraction process, while the balls and bearing brackets suppress the radial sway generated during angle adjustment through their radial support capacity. The two structures complement each other, greatly improving the rigidity and stability of the handrail body during dynamic operation, and perfectly reducing the amount of sway during the extension and rotation of the handrail body. The overall structure is simple, improving safety and structural reliability, and extending service life.

[0022] (2) By setting an infrared switch on the mounting frame to detect the position status of the handrail body after angle adjustment, non-contact position sensing is realized. This structure effectively avoids the problem of mechanical contact wear and improves detection accuracy and system reliability. At the same time, it can be linked with the control system to realize automatic recognition and feedback control of angle adjustment, which facilitates intelligent operation and enhances the automation level and human-computer interaction experience of the product.

[0023] (3) The moving block has a locking groove and is movably locked to the guide rod, so that a stable sliding fit relationship is formed between the moving block and the guide rod. The overall structure is simple and can effectively constrain the degree of freedom of the moving block in the direction perpendicular to the length of the screw, ensuring that it moves only in the predetermined direction, avoiding off-center loading or jamming, and further improving the smoothness and guiding accuracy of the telescopic action. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this application;

[0025] Figure 2 This is a schematic diagram of the installation structure between the drive mechanism, the telescopic shaft, and the bushing.

[0026] Figure 3 yes Figure 2 Exploded view.

[0027] In the diagram, 1 is the mounting frame; 10 is the guide rod; 2 is the handrail body; 20 is the telescopic shaft; 200 is the moving block; 200a is the connecting sleeve; 200b is the connecting hole; 200c is the locking groove; 201 is the locking hole; 3 is the drive mechanism; 30 is the drive component; 31 is the lead screw; 4 is the bushing; 40 is the bearing bracket; 41 is the assembly plate; 410 is the anti-disengagement groove; 5 is the infrared switch; and 6 is the limit switch. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] like Figure 1 As shown, this solution mainly describes a convenient electric armrest for use in car seats. However, this convenient electric armrest is not limited to use in car seats, but can also be applied to other types of seats, such as chairs in daily life.

[0031] like Figures 1 to 3 As shown, this utility model provides a convenient electric handrail, which includes a mounting frame 1, a handrail body 2, a drive mechanism 3, a locking mechanism, and a bushing 4.

[0032] The handrail body 2 is equipped with a telescopic shaft 20, which is movably mounted on the mounting frame 1. A drive mechanism 3 is mounted on the mounting frame 1, and the output end of the drive mechanism 3 is connected to the telescopic shaft 20. The drive mechanism 3 is used to drive the telescopic shaft 20 to move relative to the mounting frame 1 along its axial direction, so as to realize the extension and retraction of the handrail body 2. A locking mechanism is set inside the handrail body 2. The locking mechanism is used to limit the rotation angle of the handrail body 2 relative to the mounting frame 1. A bushing 4 is mounted on the mounting frame 1. The bushing 4 is embedded with a bearing bracket 4 and several balls (not shown in the figure). The balls are distributed on the wall of the bearing bracket 40 and movably contact the telescopic shaft 20. Together with the balls, the bushing is used to limit the axial wobble generated when the handrail body 2 retracts and the radial wobble generated when the angle of the handrail body 2 is adjusted.

[0033] This embodiment primarily aims to simultaneously achieve the extension and rotation angle adjustment functions of the handrail body 2. Specifically, when the user issues a command to extend the handrail body 2 via a control button (not shown in the figure), the drive mechanism 3 is activated by the control system. At this time, the output end of the drive mechanism 3 begins to rotate, which is then converted into linear motion of the extension shaft 20 (i.e., the extension shaft 20 moves along...). Figure 2 Moving to the right, which in turn causes the right-end connected armrest body 2 to extend relative to the mounting frame 1, the telescopic shaft 20 passes through the bushing 4 on the mounting frame 1. This bushing 4 acts as an external rigid limiting structure, precisely guiding the axial displacement path of the telescopic shaft 20 and effectively suppressing its axial jump (such as vibration, swaying, or rebound) during forward and backward movement, ensuring that the armrest body 2 extends outward smoothly and linearly until it reaches the preset usage position. After the armrest body 2 is fully extended, the user can manually rotate the armrest body 2 slightly according to their sitting posture or usage habits, allowing it to rotate around the axis of the telescopic shaft 20. During rotation, due to the bearing bracket 40 and several balls (not shown in the figure) embedded in the bushing 4, the telescopic shaft 20 slides between these balls, relying on the low friction and high conductivity of the balls. The high precision of the bearing housing ensures that the telescopic shaft 20 receives uniform radial support during movement, preventing jamming or lateral friction caused by uneven loading or assembly errors. It is worth noting that the ball bearings and bearing housing in this embodiment are similar to the outer ring with steel balls in a bearing. Therefore, the ball bearings, in conjunction with the bearing housing 40 and the bushing 4, not only perform axial sliding but also provide stable radial support. This significantly suppresses radial swaying or shaking caused by external forces (such as hand resting) during rotation, ensuring smooth and seamless rotation. The two structures complement each other, greatly improving the rigidity and stability of the handrail body 2 during dynamic operation, perfectly reducing the amount of swaying during extension and rotation. The overall structure is simple, improving safety and structural reliability, and extending service life.

[0034] The drive mechanism 3 includes a drive component 30 and a lead screw 31. The drive component 30 is mounted on the mounting frame 1, and the output end of the drive component 30 is connected to the lead screw 31. The length direction of the lead screw 31 is coaxial with the extension and retraction direction of the handrail body 2. The end of the extension shaft 20 is connected to a moving block 200, and the moving block 200 is movably connected to the lead screw 31.

[0035] like Figure 2 and Figure 3As shown, when the control system sends a "handrail extension" command to the drive component 30, the drive component 30 is activated and the lead screw 31 is rotated through the output shaft. Since the moving block 200 at the end of the telescopic shaft 20 is movably connected to the lead screw 31, the rotational motion of the lead screw 31 is converted into the linear motion of the moving block 200, which ultimately drives the telescopic shaft 20 and the handrail body 2 to extend outward synchronously. This structure and working principle are the same as those of the ball screw commonly used in machinery. Through the cooperation of the moving block 200 and the lead screw 31, precise and stable linear propulsion is achieved. Moreover, the lead screw 31 transmission has the advantages of high transmission efficiency and high precision, which can effectively control the extension and retraction stroke of the handrail body 2, avoid the shaking or backlash caused by power fluctuations, improve the responsiveness and stability of electric control, and ensure smooth handrail movement and accurate positioning.

[0036] The movable block 200 has a connecting sleeve 200a and a connecting hole 200b. The end of the telescopic shaft 20 has a locking hole 201. The connecting sleeve 200a is synchronously connected to the lead screw 31 along with the movable block 200. When the connecting hole 200b is aligned and connected with the locking hole 201, a fastener can pass through to fix the movable block 200 and the telescopic shaft 20.

[0037] like Figure 2 and Figure 3 As shown, in this embodiment, a connecting sleeve 200a is formed on the side of the movable block 200 near the driving member 30. This connecting sleeve 200a can be synchronously connected to the lead screw 31 along with the movable block 200. The overall structure is compact, which is beneficial for layout in narrow spaces. It also ensures the stability of the connection between the movable block 200 and the lead screw 31, thereby ensuring the smoothness of the telescopic shaft 20 driving the handrail body 2 to extend and retract. In addition, in this embodiment, the connecting hole 200b and the locking hole 201 on the telescopic shaft 20 can be fixedly connected by fasteners to form a reliable mechanical connection. This structure is easy to assemble and disassemble, which is beneficial for later maintenance. At the same time, it ensures the synchronicity and connection strength between the movable block 200 and the telescopic shaft 20 during the transmission process, prevents slippage or loosening, and improves the stability and durability of the transmission structure. It should be noted that the fasteners in this embodiment can be replaced by screws, bolts, or other connecting components.

[0038] The outer wall of the bushing 4 is connected to an assembly plate 41, which is connected to the mounting frame 1 to limit the displacement of the bushing 4, the bearing bracket 40 and the balls.

[0039] like Figure 3As shown, in this embodiment, the bushing 4 is fixedly connected to the mounting frame 1 by the mounting plate 41, which effectively restricts the overall displacement of the bushing 4, the embedded bearing bracket 40 (which is interference-fitted with the bushing), and the balls during the working process, ensuring that they are always in the correct installation position. This provides a guarantee of stability for reducing the amount of shaking during the extension and rotation of the handrail body 2. Therefore, this structure not only enhances the rigidity of the support system and avoids bearing offset or failure caused by vibration or uneven load, but also further improves the guiding accuracy and running stability of the handrail telescopic movement, ensuring the reliability of long-term use.

[0040] The mounting frame 1 is also connected to a guide rod 10. The assembly plate 41 has an anti-detachment groove 410. The guide rod 10 extends into the anti-detachment groove 410, and the moving block 200 is movably engaged with the guide rod 10.

[0041] like Figure 2 and Figure 3 As shown, in this embodiment, anti-detachment grooves 410 are provided at both the top and bottom of the assembly plate 41. Similarly, guide rods 10 on the mounting frame 1 are correspondingly provided with each anti-detachment groove 410. The guide rods 10 extend into the anti-detachment grooves 410 and are movably engaged with the anti-detachment grooves 410 to form a double limiting structure. This design not only provides stable linear guidance for the moving block 200, preventing it from deflecting or shaking during the transmission of the lead screw 31, but also prevents the moving block 200 from accidentally detaching from the guide rods 10 through the anti-detachment groove 410 structure. This significantly improves the structural safety and anti-interference ability of the entire telescopic mechanism, and is especially suitable for the vibration environment during vehicle operation.

[0042] Similarly, such as Figure 2 and Figure 3 As shown, in this embodiment, both the top and bottom ends of the moving block 200 are provided with engaging grooves 200c, which are also correspondingly provided with the guide rod 10. The engaging grooves 200c are movably engaged with the guide rod 10, so that a stable sliding fit relationship is formed between the moving block 200 and the guide rod 10. The engaging grooves 200c have a simple structure, are easy to process and manufacture, and can effectively constrain the degree of freedom of the moving block 200 in the direction perpendicular to the length of the lead screw 31, ensuring that it moves only in the predetermined direction, avoiding off-center loading or jamming, and further improving the smoothness and guiding accuracy of the telescopic action.

[0043] like Figure 1As shown, this embodiment has at least two limit switches 6 on the mounting frame 1 to detect the extension and retraction limit positions of the telescopic shaft 20 (in this embodiment, one limit switch 6 is used to detect the position when the handrail body 2 is fully retracted, and the other limit switch 6 is used to detect the position when the handrail body 2 is fully extended). When the telescopic shaft 20 reaches the preset position (i.e., the two positions mentioned above), the limit switch 6 is triggered, which can cut off the power supply of the drive mechanism 3 or send a control signal in time to realize automatic limit protection. This design effectively prevents motor overload and mechanism collision damage, ensures the safe operation of the equipment, and at the same time helps to realize precise control and automated operation of telescopic movement, and improves the intelligence level of the product.

[0044] The locking mechanism (not shown in the figure) in this embodiment adopts a ratchet (not shown in the figure) and locking block (not shown in the figure) cooperation structure built into the armrest body 2. On the one hand, this structure saves overall space by installing it inside the armrest body 2; on the other hand, the engagement of the locking block and the ratchet achieves positioning and locking after angle adjustment. This structure is characterized by its compact structure, rapid response, and strong locking force, and can reliably self-lock at any adjusted angle, meeting the needs of different users and improving the adaptability and comfort of the product. It should be noted that this structure is the same as the angle adjustment structure and working principle used in traditional car seat armrests, and will not be described in detail here.

[0045] like Figure 1 As shown, this embodiment also includes an infrared switch 5 on the mounting frame 1. The infrared switch 5 is used to detect the position of the handrail body 2 after angle adjustment, realizing non-contact position sensing. This design avoids the problem of mechanical contact wear and improves detection accuracy and system reliability. At the same time, it can be linked with the control system to realize automatic recognition and feedback control of angle adjustment, enhancing the automation level of the product and the human-computer interaction experience.

[0046] It should be noted that the drive unit 30 in this embodiment can be replaced by other drive devices such as stepper motors and servo motors. The drive unit 30 provides an axial movement power source for the handrail body 2 and can record the extension position of the handrail body 2 through a Hall sensor.

[0047] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A portable electric handrail, characterized by include: Install the frame; The handrail body is equipped with a telescopic shaft, which is movably mounted on the mounting frame. A drive mechanism is provided on the mounting frame, and the output end of the drive mechanism is connected to the telescopic shaft, which is used to drive the telescopic shaft to move relative to the mounting frame along its axial direction, so as to realize the extension and retraction of the handrail body. A locking mechanism is provided in the handrail body, and the locking mechanism is used to limit the rotation angle of the handrail body relative to the mounting frame; A bushing is provided on the mounting frame. The bushing contains a bearing bracket and several balls. The balls are distributed on the inner wall of the bearing bracket and are in movable contact with the telescopic shaft. The bushing, together with the balls, is used to limit the axial wobble generated when the handrail body is extended or retracted, as well as the radial wobble generated when the handrail body is adjusted in angle.

2. A portable electric handrail according to claim 1, characterized in that The driving mechanism includes a driving component and a lead screw. The driving component is mounted on the mounting frame, and the output end of the driving component is connected to the lead screw. The length direction of the lead screw is coaxial with the extension and retraction direction of the handrail body. A moving block is connected to the end of the extension shaft, and the moving block is movably connected to the lead screw.

3. A portable electric handrail according to claim 1, characterized in that An infrared switch is also provided on the mounting frame, which is used to determine the position of the handrail body after the angle is adjusted.

4. A portable power handrail as defined in claim 2 wherein, The movable block has a connecting sleeve and a connecting hole, and the end of the telescopic shaft has a locking hole. The connecting sleeve is synchronously connected to the lead screw along with the movable block. When the connecting hole and the locking hole are aligned and connected, fasteners can pass through to fix the movable block and the telescopic shaft together.

5. A portable power handrail as defined in claim 2 wherein, An assembly plate is connected to the outer wall of the bushing, and the assembly plate is connected to the mounting frame to limit the displacement of the bushing, the bearing bracket and the balls.

6. A portable electric handrail according to claim 5, characterized in that The mounting frame is also connected to a guide rod, and the assembly plate has an anti-detachment groove. The guide rod extends into the anti-detachment groove, and the moving block is movably engaged with the guide rod.

7. A portable electrically powered handrail according to claim 6, wherein The movable block is also provided with a locking groove, which is movably engaged with the guide rod.

8. A portable power handrail as defined in claim 1, wherein The mounting frame is also equipped with at least two limit switches, which are used to detect the extension and retraction length of the telescopic shaft.

9. A portable power handrail as defined in claim 1, wherein The locking mechanism includes a ratchet and a locking block built into the handrail body to achieve angle adjustment of the handrail body.

10. An automotive seat characterized by comprising: Includes a convenient electric handrail as described in any one of claims 1-9.

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