A two-way headrest mechanism and a vehicle headrest

Abstract

The application discloses a two-way movement headrest mechanism and a vehicle-mounted headrest. The two-way movement headrest mechanism comprises a movement mechanism framework, a headrest rod and a locking assembly. The headrest rod is connected with the movement mechanism framework, and the movement mechanism framework can move along the up-down direction relative to the headrest rod. The locking assembly is connected with the movement mechanism framework. The locking assembly comprises a manual locking strip and a locking piece. The manual locking strip is movably arranged on the outer wall of the movement mechanism framework. The manual locking strip is provided with an avoiding hole for the headrest rod to pass through. The locking piece is connected with the manual locking strip and is translated to be clamped into or separated from the headrest rod along with the movement of the manual locking strip, so as to realize the locking or unlocking of the headrest rod.

Description

Technical Field

[0001] This application relates to the field of vehicle headrest mechanism technology, and more specifically to a two-way motion headrest mechanism and a vehicle headrest. Background Technology

[0002] With the increasing demand for car seat comfort, four-way adjustable headrests—height adjustment and fore-aft adjustment—have become mainstream features. Currently, four-way adjustable headrest mechanisms in the industry are mainly divided into two types: manual and electric.

[0003] For manually adjustable headrests, the locking components in related technologies are mostly built-in designs. That is, the core components used for locking need to be installed in a pre-set channel inside the headrest frame. For example, Chinese patent application CN118876838A provides a manually adjustable four-way headrest, which discloses a manual adjustment structure. This structure uses a locking bar with a square cross section to move along a specific trajectory in the guide channel of the inner lining block to achieve unlocking and locking control of the headrest rod, thereby completing the adjustment action of the headrest.

[0004] However, the locking bar and guide post of the above-mentioned square structure require a large space for the locking bar to move and adjust, and the fit is weak. When the locking bar moves in the guide channel of the inner liner block, it will wobble relative to the inner liner block during the locking and unlocking adjustment process, resulting in poor stability. Utility Model Content

[0005] The purpose of this application is to provide a two-way motion headrest mechanism and a vehicle headrest to improve the stability during the headrest adjustment process.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a two-way motion headrest mechanism is provided, comprising: a motion mechanism frame, a headrest rod, and a locking assembly. The headrest rod is connected to the motion mechanism frame, and the motion mechanism frame can move relative to the headrest rod in the vertical direction. The locking assembly is connected to the motion mechanism frame and includes a manual locking bar and a locking member. The manual locking bar is movably disposed on the outer wall of the motion mechanism frame. The manual locking bar has an clearance hole for the headrest rod to pass through. The locking member is connected to the manual locking bar and moves to engage or disengage from the headrest rod as the manual locking bar moves, thereby locking or unlocking the headrest rod.

[0007] As a preferred embodiment, the locking component is located at the bottom of the outer wall of the motion mechanism frame.

[0008] As another preferred embodiment, two headrest rods are arranged in parallel, and the two headrest rods are connected by a first connector to achieve position synchronization; the locking member acts on one of the headrest rods to achieve synchronous locking or unlocking of the two headrest rods.

[0009] Further preferably, the headrest rod includes a first headrest rod and a second headrest rod, and the manual locking bar is provided with a first clearance hole corresponding to the passage of the first headrest rod and a second clearance hole corresponding to the passage of the second headrest rod.

[0010] Preferably, the manual locking bar has an operating part for user operation, and the operating part and the manual locking bar are located on an adjacent plane on the motion mechanism frame.

[0011] Preferably, the first headrest rod is provided with a first stop groove, and the second headrest rod is provided with a second stop groove;

[0012] The locking mechanism further includes a first locking member, a second locking member, and an elastic member. One end of the first locking member is connected to the manual locking bar, and the other end engages with the first gear groove. One end of the second locking member is connected to the manual locking bar, and the other end engages with the second gear groove. One end of the elastic member is connected to the manual locking bar, and the other end is connected to the motion mechanism frame. The elastic member provides the manual locking bar with an elastic force that enables the first locking member and the second locking member to remain engaged in the corresponding first gear groove and second gear groove. Pressing the operating part can drive the manual locking bar to move the first locking member and the second locking member against the elastic force of the elastic member, thereby disengaging them from the second gear groove to achieve unlocking.

[0013] In a further preferred embodiment, the two-way motion headrest mechanism also includes a guide block; the guide block is disposed between the motion mechanism frame and the headrest rod.

[0014] In a further preferred embodiment, the inner wall of the guide block is provided with a raised rib, and the guide block contacts and abuts against the headrest rod through the raised rib.

[0015] In a further preferred embodiment, the two-way motion headrest mechanism also includes a reinforcing plate, which is connected to the outer wall of the motion mechanism frame, and the reinforcing plate is configured to avoid the motion trajectory of the headrest rod and the manual locking bar.

[0016] Furthermore, this application also provides a vehicle headrest, comprising: a two-way motion headrest mechanism as described in any of the above; and a flexible member that covers the exterior of the two-way motion headrest mechanism.

[0017] Compared with the prior art, the beneficial effects of this application are as follows:

[0018] The manual locking bar is set on the outer wall of the motion mechanism frame, rather than in the built-in channel. The manual locking bar is externally mounted, and its shape and size can be precisely controlled by machining. There is no need to open a rectangular movement channel in the motion mechanism frame, which fundamentally avoids the fitting clearance caused by draft angle and significantly improves assembly accuracy and operational stability.

[0019] The clearance hole on the manual locking bar not only provides a through channel for the headrest rod, but also, when the headrest rod passes through the clearance hole and maintains a precise clearance fit with the hole wall, the precise clearance fit between the hole wall and the headrest rod can effectively guide the direction of movement when the motion mechanism frame is adjusted up and down.

[0020] The manual locking bar is integrally assembled on the outer wall of the motion mechanism frame, eliminating the need for a cavity or guide channel inside the frame for its installation and movement, thus significantly reducing the space occupied inside the motion mechanism frame. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a two-way motion headrest mechanism.

[0022] Figure 2 This is another structural schematic diagram of a two-way motion headrest mechanism.

[0023] Figure 3 This is a schematic diagram of the two-way motion headrest mechanism from an upward viewing angle.

[0024] Figure 4 This is a schematic diagram of the two-way motion headrest mechanism from the main view.

[0025] Figure 5 This is a schematic diagram of the two-way motion headrest mechanism from a side view.

[0026] Figure 6 This is a partial structural schematic diagram of a two-way motion headrest mechanism in some embodiments.

[0027] Figure 7 This is a schematic diagram of the locking mechanism between the manual locking bar and the headrest bar.

[0028] Figure 8 This is a partial sectional view of a two-way motion headrest mechanism.

[0029] Figure 9 This is a schematic diagram of the guide block.

[0030] Figure 10 This is a schematic diagram of the structure of a car headrest.

[0031] In the diagram: 1. Two-way motion headrest mechanism; 2. Vehicle headrest; 3. Flexible component; 4. Button; 10. Motion mechanism frame; 20. Headrest rod; 21. First headrest rod; 211. First position groove; 22. Second headrest rod; 221. Second position groove; 23. First connector; 30. Locking assembly; 31. Manual locking strip; 32. Clearance hole; 321. First clearance hole; 322. Second clearance hole; 33. Locking component; 331. First locking component; 332. Second locking component; 34. Operating part; 35. Elastic component; 40. Guide block; 41. Rib; 50. Reinforcing plate. Detailed Implementation

[0032] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0033] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0034] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0035] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0036] In related technologies, headrest movement mechanisms often employ a rectangular locking strip in conjunction with guide posts to achieve a locking function. This locking structure is typically housed within a plastic inner liner. However, since the inner liner is an injection-molded part, integral molding makes it difficult to guarantee high-precision dimensions. Furthermore, to facilitate the movement of the rectangular locking strip and guide posts within the channel, draft angles must be incorporated into the mold for the rectangular channel. Without draft angles, the rectangular locking strip or guide posts will be stuck together on all four sides within the channel, resulting in jamming. If draft angles are incorporated, significant assembly gaps will exist between the channel cross-section and the locking strip and guide posts. These gaps can cause the headrest to wobble during adjustment, affecting the feel and structural stability. This problem is inherent to the multi-faceted contact of the plastic parts and is difficult to completely avoid.

[0037] Meanwhile, the locking strip arrangement used in the related technology, which involves a transverse penetrating inner liner block, and the use of a multi-tooth meshing locking method for both the headrest rod and the guide post, often causes the end of the locking strip to protrude significantly from the inner liner block during the unlocking or locking process. This results in low overall structural space utilization and a large space occupation.

[0038] Therefore, to address the above problems, this application proposes the following structural improvements, and in a preferred embodiment, see [link to preferred embodiment]. Figures 1 to 9 This application provides a two-way motion headrest mechanism 1, including: a motion mechanism frame 10, a headrest rod 20, and a locking assembly 30. The headrest rod 20 is connected to the motion mechanism frame 10, and the motion mechanism frame 10 can move relative to the headrest rod 20 in the vertical direction. The locking assembly 30 is connected to the motion mechanism frame 10 and includes a manual locking bar 31 and a locking member 33. The manual locking bar 31 is movably disposed on the outer wall of the motion mechanism frame 10. The manual locking bar 31 is provided with a clearance hole 32 for the headrest rod 20 to pass through. The locking member 33 is connected to the manual locking bar 31 and moves to engage or disengage from the headrest rod 20 as the manual locking bar 31 moves, so as to lock or unlock the headrest rod 20.

[0039] First, the manual locking strip 31 is set on the outer wall of the motion mechanism frame 10, rather than in the built-in channel. The manual locking strip 31 is externally mounted, and its external dimensions can be precisely controlled by machining. There is no need to open a rectangular moving channel in the motion mechanism frame 10, which fundamentally avoids the fitting gap caused by the draft angle and significantly improves the assembly accuracy and operational stability.

[0040] Specifically, the headrest rod 20 is fixedly arranged vertically, and the motion mechanism frame 10 is fitted onto the headrest rod 20 through its pre-set mounting holes. The motion mechanism frame 10 and the headrest rod 20 employ a sliding fit structure, allowing the motion mechanism frame 10 to move relative to the headrest rod 20 along its axial direction (vertical direction), thereby achieving headrest height adjustment. The locking assembly 30 is detachably connected to the outer wall of the motion mechanism frame 10. Its core components include a manual locking strip 31 and a locking element 33. The manual locking strip 31 is made of a long strip of metal sheet and is slidably fitted onto the outer wall of the motion mechanism frame 10 through a pre-set horizontal groove. The stop bar 31 has circular clearance holes 32 at positions corresponding to the headrest rod 20. The headrest rod 20 passes through the clearance holes 32 and maintains a precise clearance fit with the hole wall. In the normal state, the motion mechanism frame 10 is fixed relative to the headrest rod 20 by the locking member 33. When the user pushes the manual locking bar 31 in the horizontal direction, the locking member 33 moves synchronously with the manual locking bar 31, thereby disengaging the locking member 33 from the headrest rod 20. The motion mechanism frame 10 is released from the headrest rod 20 and can slide up and down along the headrest rod 20. After the height adjustment is completed, the manual locking bar 31 is released, and the locking member 33 resets to reconnect with the headrest rod 20, restoring the locked state.

[0041] Among them, the clearance hole 32 on the manual locking bar 31 not only provides a through channel for the headrest rod 20, but the precise clearance fit between the hole wall and the headrest rod 20 can also effectively guide its movement direction when the motion mechanism frame 10 is adjusted up and down; at the same time, the axial length of the clearance hole 32 constitutes the movement stroke limit of the manual locking bar 31. When the manual locking bar 31 moves to the end of the clearance hole 32 and abuts against the side wall of the headrest rod 20, it will be unable to move further, thereby preventing the locking part 33 from excessive translation and ensuring the precise control of locking and unlocking actions.

[0042] Meanwhile, the manual locking strip 31 is integrally assembled on the outer wall of the motion mechanism frame 10, eliminating the need to open a cavity or guide channel inside the frame for its installation and movement. This significantly reduces the space occupied inside the motion mechanism frame 10, leaving ample space for subsequent integration of auxiliary functional components such as buffer pads and stroke limit blocks within the motion mechanism frame 10. It also simplifies the overall structural design of the motion mechanism frame 10 and reduces the complexity and manufacturing cost of its injection mold.

[0043] As a preferred embodiment, the locking component 30 is located at the bottom of the outer wall of the motion mechanism frame 10. The side walls and top of the motion mechanism frame 10 usually need to reserve space for mounting headrest cushioning cotton, skin covering structure, or subsequent functional expansion components. Placing the locking component 30 at the bottom can avoid layout conflicts with the above-mentioned components. Specifically, in this application, a reinforcing plate 50 is connected to the outer wall of the motion mechanism frame 10, and the reinforcing plate 50 avoids the movement trajectory of the headrest rod 20 and the manual locking bar 31. The reinforcing plate 50 will not affect the adjustment movement of the locking component 30. At the same time, when the motion mechanism frame 10 moves up and down, the reinforcing plate 50 will not interfere with the headrest rod 20. The reinforcing plate 50 can be connected to the skin covering structure, or it can reserve an installation area for subsequent expansion components such as neck support adjustment module and pressure sensing element, thereby improving the functional expandability of the motion mechanism frame 10.

[0044] As another preferred embodiment, two headrest rods 20 are arranged in parallel, and the two headrest rods 20 are connected by a first connector 23 to achieve position synchronization; and see also Figure 6 The locking element 33 can act on one of the headrest rods 20 to achieve synchronous locking or unlocking of both headrest rods 20.

[0045] Preferably, the headrest rod 20 in this application includes a first headrest rod 21 and a second headrest rod 22, and the locking member 33 includes a first locking member 331, a second locking member 332, and an elastic member 35. The first locking member 331 is provided corresponding to the first headrest rod 21, and the second locking member 332 is provided corresponding to the second headrest rod 22, so as to improve the adjustment stability of the motion mechanism frame 10. The manual locking bar 31 is provided with a first clearance hole 321 corresponding to the passage of the first headrest rod 21 and a second clearance hole 322 corresponding to the passage of the second headrest rod 22. Correspondingly, the manual locking bar 31 is provided with an operating part 34 for user operation. The operating part 34 and the manual locking bar 31 are placed on an adjacent plane on the motion mechanism frame 10. The operating part 34 is adjacent to the mounting plane of the manual locking bar 31 and protrudes from the outer wall of the frame, which conforms to the ergonomic design. The user does not need to deliberately find the operating position, and can complete the pressing and unlocking by naturally applying force with his / her hand.

[0046] Meanwhile, the first headrest rod 21 is provided with a first position groove 211, and the second headrest rod 22 is provided with a second position groove 221; one end of the first locking member 331 is connected to the manual locking bar 31, and the other end is engaged with the first position groove 211; one end of the second locking member 332 is connected to the manual locking bar 31, and the other end is engaged with the second position groove 221; one end of the elastic member 35 is connected to the manual locking bar 31, and the other end is connected to the motion mechanism frame 10. The elastic member 35 provides the manual locking bar 31 with an elastic force that enables it to drive the first locking member 331 and the second locking member 332 to remain engaged with the corresponding first position groove 211 and second position groove 221; pressing the operating part 34 can drive the manual locking bar 31 to drive the first locking member 331 and the second locking member 332 to move against the elastic force of the elastic member 35, thereby disengaging from the second position groove 221 to achieve unlocking.

[0047] The first locking component 331 and the second locking component 332 are preferably independently machined metal plates, which are modularly assembled onto the locking bar and the motion mechanism frame 10. This modular design ensures high fitting accuracy while facilitating later maintenance and parts replacement. The overall structure is compact and highly reliable, effectively suppressing shaking during adjustment. Correspondingly, the headrest rod 20 is also a metal rod. The metal plates, manual locking bar 31, and motion mechanism frame 10 are all detachably connected. When a metal plate wears out, it is not necessary to replace the entire locking assembly 30; only the corresponding metal plate needs to be removed.

[0048] When the user needs to adjust the headrest height, press the operating part 34 away from the headrest bar 20. The manual locking bar 31 slides along the horizontal guide groove and overcomes the elastic force of the elastic member 35. Simultaneously, it drives the first locking member 331 to disengage from the first position groove 211 and the second locking member 332 to disengage from the second position groove 221. At this time, the motion mechanism frame 10 is unlocked and can move up and down along the first headrest bar 21 and the second headrest bar 22. After adjusting to the target height, release the operating part 34. Under the action of the reset elastic force, the elastic member 35 pushes the manual locking bar 31 to move in the opposite direction, so that the first locking member 331 and the second locking member 332 re-engage into the corresponding position groove, completing the locking.

[0049] Further preferably, the two-way motion headrest mechanism 1 also includes a guide block 40; the guide block 40 is disposed between the motion mechanism frame 10 and the headrest rod 20, and the inner wall of the guide block 40 is provided with a protruding rib 41, through which the guide block 40 contacts and abuts against the headrest rod 20; in order to reduce the movement gap between the headrest rod 20 and the front and rear guide rods and the motion mechanism frame 10, this application independently provides a guide block 40 between the two. The guide block 40, as an intermediate guide component, cooperates with the rods and the motion mechanism frame 10 respectively. In order to strengthen the connection strength, the front and rear guide rods and the headrest rod 20 in this application can be made of metal rods. The setting of the guide block 40 not only avoids direct friction between the metal rods and the plastic frame, but also effectively eliminates the gap during movement and prevents shaking. At the same time, the use of metal rods further improves the overall structural strength and wear resistance.

[0050] Further, see Figure 10 This application also provides a vehicle headrest 2, including: a two-way motion headrest mechanism 1 as described in any of the above; and a flexible member 3, which covers the outside of the two-way motion headrest mechanism 1.

[0051] The flexible component 3 can be a multi-layer composite structure, specifically including an inner sponge cushioning layer and an outer flexible skin layer. For the locking operation adaptation of the two-way motion headrest mechanism 1, a button 4 is externally connected to the operating part 34 of the manual locking bar 31 in the locking assembly 30. This button 4 is a cylindrical or rectangular block structure, with one end detachably connected to the operating part 34 via an embedded connecting post, and the other end extending along the side of the vehicle headrest 2. Correspondingly, an opening adapted to the button 4 is pre-set on the side of the flexible component 3. The end of the button 4 away from the operating part 34 passes through the flexible component 3 along the opening and is exposed, ensuring that the user can drive the operating part 34 to activate the manual locking bar 31 by pressing the button 4.

[0052] The button 4 is located on the side of the headrest 2, which avoids the main head support area of ​​the headrest 2. When the passenger places their head on the headrest 2, the head and neck will not come into contact with the button 4, thus avoiding accidental unlocking caused by accidental operation and ensuring that pressing the button 4 will not affect the riding comfort.

[0053] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A two-way motion headrest mechanism, characterized in that, include: The motion mechanism frame, headrest rod, and locking assembly are provided, wherein the headrest rod is connected to the motion mechanism frame and the motion mechanism frame is movable relative to the headrest rod in the vertical direction. The locking assembly is connected to the motion mechanism frame. The locking assembly includes a manual locking bar and a locking element. The manual locking bar is movably disposed on the outer wall of the motion mechanism frame. The manual locking bar has a clearance hole for the headrest rod to pass through. The locking member is connected to the manual locking bar and moves to engage or disengage from the headrest rod as the manual locking bar moves, thereby locking or unlocking the headrest rod.

2. The bidirectional motion headrest mechanism as described in claim 1, characterized in that, The locking component is located at the bottom of the outer wall of the motion mechanism frame.

3. The bidirectional motion headrest mechanism as described in claim 1, characterized in that, Two headrest rods are arranged in parallel, and the two headrest rods are connected by a first connector to achieve position synchronization; The locking element acts on one of the headrest bars to achieve synchronous locking or unlocking of both headrest bars.

4. The bidirectional motion headrest mechanism as described in claim 1, characterized in that, The headrest rod includes a first headrest rod and a second headrest rod. The manual locking bar is provided with a first clearance hole corresponding to the passage of the first headrest rod and a second clearance hole corresponding to the passage of the second headrest rod.

5. The bidirectional motion headrest mechanism as described in claim 4, characterized in that, The manual locking bar is provided with an operating part for user operation, and the operating part and the manual locking bar are located on adjacent planes on the motion mechanism frame.

6. The bidirectional motion headrest mechanism as described in claim 5, characterized in that, The first headrest rod is provided with a first stop groove, and the second headrest rod is provided with a second stop groove; The locking component further includes a first locking component, a second locking component, and an elastic component. One end of the first locking component is connected to the manual locking bar, and the other end is engaged with the first gear groove. One end of the second locking component is connected to the manual locking bar, and the other end is engaged with the second gear groove. One end of the elastic element is connected to the manual locking bar, and the other end is connected to the motion mechanism frame. The elastic element provides the manual locking bar with an elastic force that enables it to drive the first locking element and the second locking element to remain engaged in the corresponding first gear groove and second gear groove. Pressing the operating part can drive the manual locking bar to move the first locking member and the second locking member against the elastic force of the elastic member, thereby disengaging from the second position groove to achieve unlocking.

7. The two-way motion headrest mechanism as described in any one of claims 1-6, characterized in that, It also includes guide blocks; The guide block is disposed between the motion mechanism frame and the headrest rod.

8. The bidirectional motion headrest mechanism as described in claim 7, characterized in that, The inner wall of the guide block is provided with a raised rib, and the guide block contacts and abuts against the headrest rod through the raised rib.

9. The bidirectional motion headrest mechanism as described in any one of claims 1-6, characterized in that, It also includes a reinforcing plate, which is connected to the outer wall of the motion mechanism frame, and the reinforcing plate is configured to avoid the movement trajectory of the headrest rod and the manual locking bar.

10. A vehicle headrest, characterized in that, include: The two-way motion headrest mechanism as described in any one of claims 1-9; A flexible component, which covers the exterior of the two-way motion headrest mechanism.

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