Armrest assembly with headrest linkage unlocking mechanism

Abstract

The utility model relates to an armrest assembly with a headrest linkage unlocking mechanism, which comprises an armrest framework and an unlocking mechanism, the armrest framework can be rotatably connected to a seat assembly around a rotating axis, a headrest with a locking mechanism is mounted at one end, far away from the rotating axis, of the armrest framework in an openable manner, and the unlocking mechanism comprises an inhaul cable. The head end of the inhaul cable is connected with the locking mechanism, a first fixing point position is fixed in the armrest framework, the inhaul cable movably penetrates through the first fixing point position, the tail end of the inhaul cable is positioned at an eccentric point position, deviating from the rotating axis, of the armrest framework, and the inhaul cable eccentrically moves in the process that the armrest framework rotates from closing to opening. The angle and the length of the inhaul cable section located between the first fixed point position and the eccentric point position are changed through the eccentric movement, and then the locking mechanism is driven to unlock the headrest. The headrest linkage unlocking device can achieve linkage unlocking of the headrest, is simple in structure, convenient to install and low in cost, and does not need to occupy more internal space of an armrest framework.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle seats, in particular to an armrest assembly with a headrest linkage unlocking mechanism. Background Art

[0002] In order to improve the comfort and experience of passengers when taking a vehicle, more and more functions are integrated on the rear seat armrests. For example, a headrest is provided at the top of the armrest for passengers to rest against. In addition, functional components such as a display screen or a cup holder can also be provided on the armrest for passengers to watch or place water cups. Among them, the cup holder is usually hidden inside the armrest and will extend out for passengers to use when the armrest is opened. However, if the cup holder extends out from the side of the armrest, it will occupy the passenger seating space. Therefore, usually when the armrest is opened, the cup holder extends out from the top of the armrest. Therefore, the headrest provided at the top of the armrest needs to be able to be easily flipped to facilitate the extension of the cup holder, and at the same time, the headrest can also be used as a base for the water cup.

[0003] There are mainly two existing unlocking mechanisms for opening the headrest:

[0004] The first is a mechanical unlocking mechanism, as Figure 1 shown. This unlocking mechanism includes a cable 11, a first slider 12, and a second slider 13. One end of the cable 11 is connected to the locking mechanism of the headrest, and the other end is connected to the first slider 12. The first slider 12 is fixed to the armrest skeleton through a first bracket 121, and the second slider 13 is fixed to the armrest rotating shaft (not shown in the figure) through a second bracket 131. When the armrest skeleton rotates, the armrest rotating shaft rotates together with the armrest skeleton, driving the second slider 13. There is a groove provided on the second slider 13, and a pin cooperating with this groove is provided on the first slider 12. The rotation of the second slider 13 is converted into the movement of the first slider 12 through the action of the groove and the pin, and then drives the cable 11 to pull the locking mechanism of the headrest to achieve unlocking. This unlocking mechanism 1 has many parts, high assembly difficulty, a large volume, and the mechanism layout and movement envelope require more internal space of the armrest skeleton.

[0005] The second is an electronic unlocking mechanism, as Figure 2 shown. This unlocking mechanism includes a cable 11, a motor assembly 14, and a sensor. One end of the cable 11 is connected to the locking mechanism of the headrest, and the other end is cooperatively connected to the motor assembly 14. The sensor senses whether the headrest needs to be opened and sends a signal to the motor assembly 14 when the headrest needs to be opened. After receiving the signal, the motor assembly 14 controls the cable 11 to pull the locking mechanism of the headrest to achieve unlocking. This unlocking mechanism has a complex structure, high assembly difficulty, a heavy weight and a large volume. It also requires more internal space of the armrest skeleton, and the cost of the motor assembly 14 and the sensor is relatively high. Summary of the Utility Model

[0006] To solve the above problems, the present utility model provides an armrest assembly with a headrest linkage unlocking mechanism, which utilizes the reverse movement of the eccentric motion principle and realizes the linkage unlocking of the headrest based on the rotation of the armrest assembly. The structure is simple, the installation is convenient, the cost is low, and it does not need to occupy too much internal space of the armrest skeleton.

[0007] The present utility model is realized through the following scheme: An armrest assembly with a headrest linkage unlocking mechanism includes an armrest skeleton rotatably connected to a seat assembly about a rotation axis. A headrest with a locking mechanism is detachably installed at one end of the armrest skeleton far from the rotation axis. The armrest assembly further includes an unlocking mechanism, and the unlocking mechanism includes a cable. The head end of the cable is connected to the locking mechanism. A first fixed point is fixed inside the armrest skeleton. The cable movably passes through the first fixed point and is positioned at an eccentric point on the armrest skeleton deviating from the rotation axis at the tail end. The cable performs an eccentric motion during the process of the armrest skeleton rotating from the closed state to the open state. By the eccentric motion, the angle and length of the cable section between the first fixed point and the eccentric point are changed, thereby driving the locking mechanism to unlock the headrest.

[0008] A further improvement of the armrest assembly with a headrest linkage unlocking mechanism of the present utility model is that the first fixed point rotates with the rotation of the armrest skeleton, and it is satisfied that during the process of the armrest skeleton rotating from the closed state to the open state, it drives the cable section to first become longer and then shorter.

[0009] A further improvement of the armrest assembly with a headrest linkage unlocking mechanism of the present utility model is that a rotating shaft extending along the rotation axis direction is fixed on the seat assembly, and the armrest skeleton is rotatably connected to the rotating shaft.

[0010] A further improvement of the armrest assembly with a headrest linkage unlocking mechanism of the present utility model is that the unlocking mechanism further includes an eccentric unlocking member. The eccentric unlocking member is provided with a central point facing the rotating shaft and the eccentric point deviating from the rotating shaft. The rotating shaft is fixed to the central point, and the tail end of the cable is connected to the eccentric point.

[0011] A further improvement of the armrest assembly with a headrest linkage unlocking mechanism of the present utility model is that the sum of the distance from the first fixed point to the central point and the distance from the eccentric point to the central point is greater than the sum of the length of the cable section when the headrest is in the closed state and the unlocking stroke of the locking mechanism.

[0012] A further improvement of the armrest assembly with a headrest linkage unlocking mechanism of the present utility model lies in that the eccentric unlocking member is an eccentric piece, the eccentric piece includes a central portion and an extension portion formed at the edge of the central portion and extending outward along the central portion, the central point position is located at the center of the central portion, and the eccentric point position is located at one end of the extension portion far from the central portion.

[0013] A further improvement of the armrest assembly with a headrest linkage unlocking mechanism of the present utility model lies in that both the central point position and the eccentric point position are hole structures, and the rotating shaft is inserted into the hole structure of the central point position and fixed to the central portion.

[0014] A further improvement of the armrest assembly with a headrest linkage unlocking mechanism of the present utility model lies in that a plug head is fixed to the tail end of the cable, and the plug head is rotatably inserted into the hole structure of the eccentric point position.

[0015] A further improvement of the armrest assembly with a headrest linkage unlocking mechanism of the present utility model lies in that the eccentric unlocking member is an eccentric wheel, the rotating shaft passes through the shaft hole of the eccentric wheel, the central point position is located at the center of the shaft hole of the eccentric wheel, and the eccentric point position is located at the edge of the eccentric wheel.

[0016] A further improvement of the armrest assembly with a headrest linkage unlocking mechanism of the present utility model lies in that a damper is installed on the rotating shaft, and the rotating shaft is fixed to the eccentric unlocking member after passing through the damper.

[0017] The present utility model utilizes the reverse movement of the eccentric motion principle and realizes the linkage unlocking of the headrest based on the rotation of the armrest assembly. The structure is simple, the installation is convenient, the cost is low, and it does not need to occupy too much internal space of the armrest skeleton. In addition, through the coordinated design of the positions of each point in the unlocking mechanism, the cable section has a process of becoming longer and then shorter during the rotation of the armrest skeleton, so that the locking mechanism of the headrest can automatically reset and lock after unlocking, avoiding the damage of the cable and the locking mechanism caused by the cable always tightening the locking mechanism. Description of the Drawings

[0018] Figure 1 Shows an exploded view of a traditional mechanical unlocking mechanism.

[0019] Figure 2 Shows an exploded view of a traditional electronic unlocking mechanism.

[0020] Figure 3 Shows an exploded view of the first embodiment of the armrest assembly of the present utility model.

[0021] Figure 4 Shows a schematic diagram of the assembled state of the unlocking mechanism in the first embodiment of the armrest assembly of the present utility model.

[0022] Figure 5 shows Figure 4 a magnified schematic view of location A in

[0023] Figure 6 shows an exploded view of the second embodiment of the armrest assembly of the present utility model.

[0024] Figure 7 shows an exploded view of the third embodiment of the armrest assembly of the present utility model.

[0025] Figure 8 shows a schematic view of the assembled state of the cable, eccentric unlocking member and rotating shaft in the third embodiment of the armrest assembly of the present utility model.

[0026] Figure 9 shows a comparative diagram of the changing states of the unlocking mechanism during the rotation of the armrest assembly of the present utility model.

[0027] Figure 10 shows a schematic view of the working principle of the unlocking mechanism during the rotation of the armrest assembly of the present utility model.

[0028] Figure 11 shows an equivalent diagram of key parameters when the unlocking mechanism of the present utility model performs unlocking.

[0029] Figure 1 and Figure 2 in: 11, cable; 12, first slider; 121, first bracket; 13, second slider; 131, second bracket; 14, motor assembly.

[0030] Figures 3 to 11 in: 2, armrest skeleton; 21, first fixed point; 211, card slot member; 212, card sleeve; 24, second fixed point; 25, orientation clip; 3, headrest; 31, headrest rod; 41, cable; 411, cable segment; 412, plug head; 42a, eccentric piece; 42b, eccentric wheel; 421, central part; 422, extension part; 423, shaft hole; 424, groove; 43, bolt; 51, first rotating shaft; 52, second rotating shaft; 6, damper; 7, angle adjuster; 8, functional part. Detailed Embodiment

[0031] Since the existing headrest linkage unlocking mechanism has a complex structure, high assembly difficulty, a relatively large volume and occupies a relatively large amount of internal space of the armrest skeleton. Therefore, the present utility model provides an armrest assembly with a headrest linkage unlocking mechanism, which utilizes the reverse movement of the eccentric motion principle to realize the linkage unlocking of the headrest based on the rotation of the armrest assembly, has a simple structure, is convenient to install, has a low cost, and does not need to occupy a relatively large amount of internal space of the armrest skeleton. The following further describes the armrest assembly with a headrest linkage unlocking mechanism with specific embodiments in conjunction with the drawings.

[0032] Refer to Figures 3 to 8 As shown, an armrest assembly with a headrest linkage unlocking mechanism includes an armrest skeleton 2 rotatably connected to a seat assembly about a rotation axis. One end of the armrest skeleton 2 far from the rotation axis is provided with a headrest with a locking mechanism in an openable and closable manner. A headrest rod 31 for installing the headrest is provided on the armrest skeleton 2. The armrest assembly further includes an unlocking mechanism. The unlocking mechanism includes a cable 41. The head end of the cable 41 is connected to the locking mechanism. A first fixed point 21 is fixed inside the armrest skeleton 2. The cable 41 movably passes through the first fixed point 21 and is positioned at an eccentric point on the armrest skeleton 2 that deviates from the rotation axis at the tail end. The cable 41 performs an eccentric movement during the process of the armrest skeleton 2 rotating from a closed state to an open state. By this eccentric movement, the angle and length of the cable segment 411 between the first fixed point 21 and the eccentric point are changed, thereby driving the locking mechanism to unlock the headrest 3.

[0033] Specifically: A pair of rotating shafts extending along the rotation axis are relatively fixed on the seat assembly, namely a first rotating shaft 51 and a second rotating shaft 52. The armrest skeleton 2 is rotatably connected to the pair of rotating shafts. Specifically, the unlocking mechanism 4 further includes an eccentric unlocking member. The eccentric unlocking member is provided with a central point disposed opposite to the first rotating shaft 51 and an eccentric point disposed away from the first rotating shaft 51. The first rotating shaft 51 is fixed to the central point. The tail end of the cable 41 is connected to the eccentric point.

[0034] In some embodiments, the eccentric unlocking member is an eccentric piece 42a. As shown in the first embodiment of Figures 3 to 5 and the second embodiment of Figure 6 shown, the eccentric piece 42a includes a central portion 421 and an extension portion 422 formed at the edge of the central portion 421 and extending radially outward along the central portion 421. The central point is located at the center of the central portion 421, and the eccentric point is located at one end of the extension portion 422 far from the central portion 421. Both the central point and the eccentric point are hole structures. The first rotating shaft 51 is inserted and fixed in the hole structure of the central point. A plug head 412 is fixed at the tail end of the cable 41, and the plug head 412 is rotatably inserted into the hole structure of the eccentric point.

[0035] As shown in Figure 6 shown, the first fixed point 21 includes a groove member 211 fixed on the armrest skeleton 2 and a sleeve 212 clamped in the groove member 211. The cable 41 movably passes through the sleeve 212. The groove member 211 can be pre-integrated into the armrest skeleton 2 made of a plastic part or a metal part.

[0036] Since the cable 41 needs to be tied from the headrest at the front end to the first rotating shaft 51 at the rear end, almost running through the entire armrest skeleton 2, in order to effectively protect the cable 41 and ensure the stretching direction of each position of the cable 41, a second fixed point 24 is fixed at the position inside the armrest skeleton 2 between the front end of the cable 41 and the first fixed point 21. The second fixed point 24 is also preferably a plastic part, on which a through groove for the cable 41 to movably pass through is formed, and the through groove extends along the designed path of the cable 41, mainly for the turning of the cable 41. The second fixed point 24 can also be pre-integrated onto the armrest skeleton 2.

[0037] Preferably, a directional clip 25 is fixed at the position on the armrest skeleton 2 close to the headrest 3. A clamping space for the cable 41 to movably pass through in the direction pointing to the headrest is formed on the directional clip 25, and it is mainly arranged close to the headrest to ensure that the front end of the cable 41 is naturally connected to the locking mechanism of the headrest.

[0038] The difference between the above first embodiment and the second embodiment lies in the different structures of the armrest skeleton 2. In the second embodiment, as Figure 6 shown, an angle adjuster 7 is installed on one side of the armrest skeleton 2 corresponding to the second rotating shaft 52. The angle adjuster 7 includes a fixed disk and a rotating disk rotatably connected to the fixed disk. The rotating disk is fixed to the armrest skeleton 2, and the fixed disk is fixed to the second rotating shaft 52. The armrest skeleton 2 can be driven to rotate around the rotation axis through the angle adjuster 7 to open and close the armrest. The eccentric piece 42a is located inside the armrest skeleton 2, and the eccentric piece 42a is fixed to the first rotating shaft 51 by passing the first rotating shaft 51 through the hole structure at the center point of the eccentric piece 42a. In the first embodiment, as Figures 3 to 5 shown, a damper 6 is also installed on the first rotating shaft 51 to provide a damping force when the armrest skeleton 2 rotates. After passing through the damper 6, the first rotating shaft 51 is fixed to the above-mentioned eccentric piece 42a.

[0039] In some other embodiments, the eccentric unlocking piece is an eccentric wheel 42b. As shown in the third embodiment of Figure 7 and Figure 8 , compared with the second embodiment, the difference of this embodiment is only that the eccentric unlocking piece is different. In this embodiment, the center point is located at the center of the shaft hole 423 of the eccentric wheel 42b. The first rotating shaft 51 passes through the shaft hole 423 of the eccentric wheel 42b and is fixedly connected to the eccentric wheel 42b. A groove 424 is formed at the edge of the eccentric wheel 42b, and the eccentric point is located at the groove 424 of the eccentric wheel 42b. The rear end of the cable 41 is connected to the groove 424. It can be imagined that a damper can also be provided between the eccentric wheel 42b and the armrest skeleton 2, and after passing through the damper 6, the first rotating shaft 51 is fixed to the eccentric wheel 42b.

[0040] The unlocking principle of the headrest linkage unlocking mechanism will be described below based on the above first embodiment:

[0041] Cooperate with Figure 9 and Figure 10 as shown, Figure 9 Figure 10 shows a comparison diagram of the change state of the unlocking mechanism during the rotation of the armrest assembly. Figure 10 Figure 11 shows a schematic diagram of the working principle of the unlocking mechanism during the rotation of the armrest assembly. Among them:

[0042] When the armrest assembly is in the closed state, as shown in Figure 9 Figure 12(a), at this time, the headrest 3 is also in the closed state, and the headrest 3 is locked in the closed state by the locking mechanism for the passenger's head to lean on the side. The cable segment 411 is located on the left side of the central point O1 (i.e., the rotation axis) and is in a relaxed state. Cooperate with Figure 10 Figure 12(a), the connection lines of the first fixed point 21, the central point O1, and the eccentric point O2 form a triangle, and the connection line between the first fixed point 21 and the eccentric point O2 corresponds to the cable segment 411.

[0043] When the armrest assembly starts to rotate clockwise, since the eccentric unlocking member is fixed to the first rotating shaft 51 of the seat assembly, it remains stationary, that is, both the central point O1 and the eccentric point O2 remain stationary. And the first fixed point 21 is fixed to the armrest frame 2. Therefore, the first fixed point 21 will rotate as the armrest assembly rotates, and then the position of the first fixed point 21 relative to the eccentric point O2 changes, and this change will drive the cable segment 411 (located between the first fixed point 21 and the eccentric point O2) to swing, resulting in an angular change and even a length change.

[0044] When the armrest assembly rotates to the first angle, as shown in Figure 9 Figure 12(b), at this time, the cable segment 411 is stretched to a taut state. When the armrest assembly continues to rotate, the cable segment 411 continues to be stretched, and then the locking mechanism of the headrest 3 is pulled to move. When the locking mechanism moves beyond its unlocking stroke, that is, as shown in Figure 9 Figure 12(c), at this time, the headrest 3 is unlocked and opened, and the cable segment 411 swings with the first fixed point 21 to the state where the three points (the first fixed point 21, the central point O1, and the eccentric point O2) are collinear. At this time, the length of the cable segment 411 is the longest. The moment when the headrest 2 is unlocked and opened, the cable segment 411 is just pulled to the longest, which is the best way. In actual application, the moment when the headrest 2 is unlocked and opened can also correspond to any moment during the process of the cable segment 411 being pulled and lengthened. That is to say, the unlocking can be achieved before the cable segment 411 swings to the state where the above-mentioned three points are collinear, specifically depending on the unlocking stroke of the locking structure and the setting positions of the three points, so that it satisfies the following relationship, cooperate withFigure 11 As shown:

[0045] L1+L2>L0+d (1)

[0046] Wherein: L1 represents the distance from the eccentric point O2 to the center point O1; L2 represents the distance from the first fixed point 21 to the center point O1; d represents the unlocking stroke of the locking mechanism, including tolerance; L0 represents the initial state of the headrest 3 (i.e. Figure 9 and Figure 10 The handrail shown in Figure (a) is the length of the cable section 411 when the handrail is in a closed state.

[0047] Furthermore, in order to avoid damage to the cable 41 and the locking mechanism due to the cable 41 constantly pulling the locking mechanism, it is necessary to make the cable segment 411 have a process of lengthening and then shortening during the rotation of the armrest frame 2, so that the locking mechanism of the headrest 3 can automatically reset and lock after being unlocked. Figure 9 As shown in Figures (d) and (e), before the cable segment 411 swings to the point where the three points are collinear, the length of the cable segment 411 increases. When the cable segment 411 swings to the point where the three points are collinear, the handrail assembly is not fully opened and needs to be further rotated. In the further rotation process, the cable segment 411 swings to the right side of the center point O1 (i.e., the rotation axis), and the handrail assembly is not fully opened. Figure 10 As shown in FIG. 5( d ), at this time, the length of the cable segment 411 begins to shorten, and as the cable segment 411 gradually shortens, the locking mechanism of the headrest 3 is reset (i.e. Figure 9 (d) state), if the handrail assembly still needs to continue to rotate, the cable segment 411 will return to the relaxed state (i.e. Figure 9 In addition to satisfying the above relationship (1), the unlocking angle θ needs to be designed, that is, the angle between L1 and L2 when the headrest 3 is in the initial state (as shown in Figure (e)). Figure 11 shown).

[0048] The utility model utilizes the reverse motion of the eccentric motion principle and realizes the linkage unlocking of the headrest 3 based on the rotation of the armrest assembly. It has a simple structure, is easy to install, has low cost, and does not need to occupy much internal space of the armrest frame 2. In addition, through the coordinated design of the positions of each point in the unlocking mechanism, the cable segment 411 has a process of lengthening and then shortening during the rotation of the armrest frame 2, so that the locking mechanism of the headrest 3 can automatically reset and lock after being unlocked, avoiding damage to the cable 41 and the locking mechanism caused by the cable 41 constantly tightening the locking mechanism.

[0049] The present utility model has been described in detail in combination with the embodiments with reference to the accompanying drawings. Those of ordinary skill in the art can make various variations of the present utility model according to the above description. Therefore, certain details in the embodiments should not constitute a limitation to the present utility model, and the protection scope of the present utility model will be defined by the scope defined in the appended claims.

Claims

1. An armrest assembly with a headrest linkage unlocking mechanism, comprising an armrest skeleton rotatably connected to a seat assembly about a rotation axis, and a headrest with a locking mechanism is detachably installed at one end of the armrest skeleton far from the rotation axis, characterized in that, It further includes an unlocking mechanism. The unlocking mechanism includes a cable. The head end of the cable is connected to the locking mechanism. A first fixed point is fixed inside the armrest frame. The cable movably passes through the first fixed point and is positioned at an eccentric point on the armrest frame that deviates from the rotation axis at the tail end. The cable performs an eccentric movement during the process of the armrest frame rotating from the closed state to the open state. By means of the eccentric movement, the angle and length of the cable section between the first fixed point and the eccentric point are changed, thereby driving the unlocking headrest of the locking mechanism.

2. The armrest assembly with a headrest linkage unlocking mechanism as claimed in claim 1, wherein, The first fixed point rotates along with the rotation of the armrest frame, and it is satisfied that during the process of the armrest frame rotating from the closed state to the open state, the cable section is first lengthened and then shortened.

3. The armrest assembly with a headrest linkage unlocking mechanism as claimed in claim 1, wherein A rotating shaft extending along the rotation axis direction is fixed on the seat assembly, and the armrest frame is rotatably connected to the rotating shaft.

4. The armrest assembly with a headrest linkage unlocking mechanism according to claim 3, characterized in that, The unlocking mechanism further includes an eccentric unlocking member. The eccentric unlocking member is provided with a central point facing the rotating shaft and the eccentric point deviating from the rotating shaft. The rotating shaft is fixed to the central point, and the tail end of the cable is connected to the eccentric point.

5. The armrest assembly with a headrest linkage unlocking mechanism according to claim 4, characterized in that, The sum of the distance from the first fixed point to the central point and the distance from the eccentric point to the central point is greater than the sum of the length of the cable section when the headrest is in the closed state and the unlocking stroke of the locking mechanism.

6. The armrest assembly with a headrest linkage unlocking mechanism according to claim 4, wherein, The eccentric unlocking member is an eccentric piece. The eccentric piece includes a central part and an extension part formed at the edge of the central part and extending outward along the central part. The central point is located at the center of the central part, and the eccentric point is located at one end of the extension part far from the central part.

7. The armrest assembly with a headrest linkage unlocking mechanism as claimed in claim 6, wherein Both the central point and the eccentric point are hole structures, and the rotating shaft is inserted into the hole structure of the central point and fixed to the central part.

8. The armrest assembly with a headrest linkage unlocking mechanism as claimed in claim 7, wherein A plug head is fixed at the tail end of the cable, and the plug head is rotatably inserted into the hole structure of the eccentric point.

9. The armrest assembly with a headrest linkage unlocking mechanism as claimed in claim 4, wherein, The eccentric unlocking member is an eccentric wheel. The rotating shaft passes through the shaft hole of the eccentric wheel. The central point is located at the center of the shaft hole of the eccentric wheel, and the eccentric point is located at the edge of the eccentric wheel.

10. The armrest assembly with a headrest linkage unlocking mechanism according to claim 4, characterized in that, A damper is installed on the rotating shaft, and the rotating shaft passes through the damper and then is fixed to the eccentric unlocking member.

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