Headrest mechanism capable of being adjusted in two directions

Abstract

The utility model relates to a two-way adjusting headrest mechanism which comprises a moving part, a fixed base and a sliding block, the fixed base is fixedly installed on a seat backrest and provided with a guide rail, the moving part is provided with a guide groove, the guide rail is installed in the guide groove so that the moving part can move on the fixed base, the fixed base is further provided with a long groove, and the long groove is communicated with the sliding block. The sliding block is located on the side, away from the moving part, of the fixed base and fixedly connected with the moving part in the mode of penetrating through the long groove. According to the two-way adjusting headrest mechanism, the moving part is connected with the fixed base through the sliding block, the function of reinforcing and supplementing rigidity is achieved, the size of the shielding part is increased by reducing the matching size of the relative moving part on the basis of guaranteeing the stroke, and even if the shape of a seat backrest is not high enough, the shielding part can be still still still. When the headrest is moved to the highest position, the headrest rear structure can still be shielded by the seat backrest, a better appearance effect is obtained, and the suspension type modeling headrest is suitable for suspension type modeling headrests and is simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to a car seat, and more particularly to a two-way adjustable headrest mechanism. Background Art

[0002] Known headrests are movably mounted on the seat backs to provide head support to passengers of different heights as required. If the seat back shape is not high enough, when the headrest is moved to the highest position, the rear structure of the headrest is exposed, which is not very beautiful. Utility Model Content

[0003] In order to solve the unsightly problem in the prior art, the utility model provides a two-way adjustable headrest mechanism.

[0004] According to the two-way adjustable headrest mechanism of the utility model, it includes a moving component, a fixed base and a slider, wherein the fixed base is fixedly mounted on the seat back and has a guide rail, the moving component has a guide groove, the guide rail is installed in the guide groove to realize the movement of the moving component on the fixed base, the fixed base also has a long groove, the slider is located on a side of the fixed base away from the moving component and is fixedly connected to the moving component in a manner of passing through the long groove.

[0005] Preferably, the long slot is arranged to extend longitudinally, and the fixed base further has a plurality of transversely extending locking slots communicating with the long slot.

[0006] Preferably, the two-way adjustable headrest mechanism also includes a locking member movably mounted on the moving component, the locking member having a locking portion, and as the moving component moves on the fixed base, the locking portion moves in the long slot and can move relative to the moving component to enter the locking slot for locking.

[0007] Preferably, the two-way adjustable headrest mechanism further comprises a locking spring, wherein the locking spring acts on the locking member to keep the locking portion in the locking groove.

[0008] Preferably, the slider has a transverse groove, and the locking portion is inserted into the transverse groove and can move in the transverse groove.

[0009] Preferably, the locking member comprises a steel wire, and the locking portion is configured to be bent into a U-shape perpendicular to an extending direction of the steel wire.

[0010] Preferably, the locking member comprises a push plate and a locking piece which are fixedly connected, and the locking portion is configured as the locking piece which is arranged perpendicular to the moving direction of the push plate.

[0011] Preferably, the locking member comprises a rotating shaft and a locking plate which are fixedly connected, and a cable connected to the rotating shaft, and the locking portion is configured as the locking plate which can rotate with the rotating shaft under the action of the cable.

[0012] Preferably, it is characterized in that the two-way adjustable headrest mechanism further comprises a button, and the button acts on the steel wire or the push plate or the pull cable so that the locking portion is disengaged from the locking groove to achieve unlocking.

[0013] Preferably, the two-way adjustable headrest mechanism further comprises a motor and a transmission nut, wherein the motor is fixedly mounted on the fixed base, and the transmission nut is fixedly mounted on the moving component and cooperates with the screw thread of the motor.

[0014] Preferably, the two-way adjustable headrest mechanism further comprises a lubrication strip arranged between the guide groove and the guide rail.

[0015] According to the two-way adjustable headrest mechanism of the utility model, the moving part is connected to the fixed base through a slider, which plays a role in strengthening and supplementing rigidity. On the basis of ensuring the stroke, the matching size of the relative moving part is reduced, thereby increasing the size of the shielding part. Even if the seat back shape is not high enough, when the headrest is moved to the highest position, the rear structure of the headrest can still be blocked by the seat back, obtaining a better appearance effect. It is suitable for suspended headrests, has a simple structure and low cost. Moreover, according to the two-way adjustable headrest mechanism of the utility model, the headrest can be adjusted up and down by unlocking the button. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure shows the up and down movement of a two-way adjustable headrest mechanism according to a preferred embodiment of the utility model.

[0017] Figure 2 yes Figure 1 Exploded diagram.

[0018] Figure 3 yes Figure 1 An exploded view from another perspective.

[0019] Figure 4 Show Figure 2 Installation of fixed base and moving parts.

[0020] Figure 5 yes Figure 4 sectional view of .

[0021] Figure 6 Show Figure 2 Installation of lubrication strips.

[0022] Figure 7 yes Figure 6sectional view of .

[0023] Figure 8 Show Figure 2 Installation of locking wire and slider.

[0024] Fig. 9 Show Figure 2 Installation of locking wire.

[0025] Fig.10 yes Fig. 9 sectional view of .

[0026] Fig.11 Show Figure 2 Schematic diagram of the structure of the slider.

[0027] Fig.12 Show Figure 2 Button installation.

[0028] Fig.13 Shown from another perspective Figure 2 Button installation.

[0029] Fig.14 Show Figure 2 Installation of the spring.

[0030] Fig.15 Shows the low position of the two-way adjustable headrest mechanism.

[0031] Fig.16 yes Fig.15 Schematic diagram of the local structure.

[0032] Fig.17 Shows the unlocked state of the two-way adjustable headrest mechanism.

[0033] Fig.18 yes Fig.17 Schematic diagram of the local structure.

[0034] Fig.19 Shows the high position of the two-way adjustable headrest mechanism.

[0035] Fig. 20 yes Fig.18 Schematic diagram of the local structure.

[0036] Fig.21 The working principle of the two-way adjustable headrest mechanism according to the utility model is shown.

[0037] Fig. 22 It is an exploded view of a two-way adjustable headrest mechanism according to another preferred embodiment of the utility model.

[0038] Fig.23 Show Fig. 22 Installation of the push plate.

[0039] Fig.24 Show Fig. 22 The unlocking principle.

[0040] Fig.25 It is an assembly diagram of a two-way adjustable headrest mechanism according to another preferred embodiment of the utility model.

[0041] Fig.26 Show Fig.25 Installation of the cable.

[0042] Fig. 27 Show Fig.25 Installation of the rotating shaft.

[0043] Fig.28 Show Fig.25 The unlocking principle.

[0044] Fig.29 It is a structural schematic diagram of a two-way adjustable headrest mechanism according to another preferred embodiment of the utility model.

[0045] Fig.30 yes Fig.29 Exploded diagram. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present utility model are given below in conjunction with the accompanying drawings and described in detail.

[0047] like Figure 1 As shown, the two-way adjustable headrest mechanism according to a preferred embodiment of the utility model can be adjusted up and down between the high position in the left figure and the low position in the right figure.

[0048] Combination Figure 2 and Figure 3 According to the two-way adjustable headrest mechanism of this embodiment, the front cover 1, the moving part 3, the fixed base 7 and the rear cover 10 are provided, wherein the fixed base 7 is fixedly mounted on the seat back, the moving part 3 is movably mounted on the fixed base 7, the front cover 1 is fixedly mounted on the front side of the moving part 3, and the rear cover 10 is fixedly mounted on the front cover 1 on the rear side of the moving part 3, thereby providing a headrest movably mounted on the seat back. Specifically, as Figure 4 and Figure 5 As shown, the fixed base 7 has a pair of guide rails 71 , and the moving component 3 has a pair of guide grooves 31 . By installing the guide rails 71 into the guide grooves 31 , the moving component 3 can realize the up and down movement on the fixed base 7 .

[0049] like Figure 2 and Figure 3 As shown, the two-way adjustable headrest mechanism according to this embodiment further includes two narrow lubricating strips 5 and four wide lubricating strips 6, as shown in FIG. Figure 6 and Figure 7 As shown, narrow lubricating strips 5 are arranged on the left and right sides of the guide rail 71, and wide lubricating strips 6 are arranged on the front and rear sides of the guide rail 71. The narrow lubricating strips 5 and the wide lubricating strips 6 match the guide grooves 31 of the moving part 3 to improve the smoothness of the moving part 3 when it moves relative to the fixed base 7.

[0050] like Figure 2 and Figure 3 As shown, the two-way adjustable headrest mechanism according to this embodiment further includes a steel wire 2 mounted on the moving part 3 so as to be movable left and right. Figure 8 As shown, the middle of the steel wire 2 has a U-shaped locking portion 21 bent perpendicular to the extension direction of the steel wire, and the moving part 3 has a waist-shaped hole 32, and the locking portion 21 extends from the front to the back through the waist-shaped hole 32. Fig. 9 and Fig.10 As shown, the moving component 3 is provided with an undercut structure 34 for fixing the steel wire 2 to prevent the steel wire 2 from falling out.

[0051] like Figure 2 and Figure 3 As shown, the two-way adjustable headrest mechanism according to this embodiment further includes a slider 8 fixedly mounted on the moving component 3 to increase the impact resistance and rigidity of the headrest, wherein the slider 8 is located on the side of the fixed base 7 away from the moving component 3. Figure 8 As shown, the fixed base 7 has a slot 72, which includes a long slot 722 extending vertically and a locking slot 721 extending horizontally from the long slot 722 at different heights. The slider 8 has a support column 81 extending forward and backward. The moving component 3 has a round hole 33. The support column 81 passes through the long slot 722 and enters the round hole 33 and is locked and fixed by a screw 9. As the moving component 3 moves on the fixed base 7, the locking portion 21 extending through the waist-shaped hole 32 moves up and down in the long slot 722 and can enter the locking slot 721 to be locked and unlocked. Fig.11 As shown, the slider 8 has a transverse groove 82, and the locking portion 21 extending through the groove 72 can move in the transverse groove 82. It should be understood that the transverse groove 82 can provide certain support for the steel wire 2, and the setting of the transverse groove 82 does not affect the locking and unlocking functions of the steel wire 2 by moving left and right.

[0052] like Figure 2 and Figure 3 As shown, the two-way adjustable headrest mechanism according to this embodiment further includes a return spring 11 and a button 12, wherein the button 12 is pressably mounted on the rear cover 10 via the return spring 11. Fig.12 As shown, the back cover 10 has a countersunk hole 105, and the button 12 is assembled in the countersunk hole 105. Fig.13As shown, the button 12 has a pair of hooks 121, the back cover 10 has a step surface 106, and the hooks 121 are fixed on the step surface 106; the button 12 has a pressing column 122, the back cover 10 has a through hole 107, the steel wire 2 has a vertical folding section 22, and the pressing column 122 passes through the through hole 107 and acts on the vertical folding section 22. Specifically, the free end of the pressing column 122 has a groove, and the vertical folding section 22 is arranged in the groove to prevent the steel wire 2 from slipping out. In this way, the movement of the steel wire 2 can be promoted by pressing the button 12.

[0053] like Figure 2 and Figure 3 As shown, the two-way adjustable headrest mechanism according to this embodiment further includes a locking spring 13, which is mounted on the front cover 1 and provides a locking force to the steel wire 2 so that the locking portion 21 of the steel wire 2 is kept in the locking groove 721. Fig.14 As shown, the front cover 1 is provided with a hole slot 101, the side wall of the hole slot 101 has a pair of aligned openings, the locking spring 13 is installed in the hole slot 101, and the steel wire 2 has a transverse folding section 23, which is inserted into the hole slot 101 along the opening and contacts with the locking spring 13, so that the locking spring 13 can apply a force to the steel wire 2, so that the locking portion 21 of the steel wire 2 remains in the locking slot 721.

[0054] Fig.15 and Fig.16 FIG. 2 shows the low position state of the two-way adjustable headrest mechanism according to this embodiment, at which the locking portion 21 of the steel wire 2 is located in the locking groove 721 of the fixed base 7. Fig.17 and Fig.18 As shown, the passenger presses the button 12 with an external force F, and the button 12 pushes the wire 2, which in turn pushes the locking portion 21 to disengage from the locking groove 721 and enter the long groove 722, and the headrest is unlocked. Fig.19 and Fig. 20 As shown, the moving component 3 moves upward to a high position, the button 12 is released, and the steel wire 2 enters the locking groove 721 of the corresponding height under the action of the locking spring 13, and the headrest is locked.

[0055] like Fig.21As shown, the rear cover 10 of the two-way adjustable headrest mechanism according to this embodiment has an opening of height H, that is, the length of the guide groove 31 of the moving part 3 is H, and the overlap amount between the fixed base 7 and the rear cover 10 is L, that is, the length of the guide rail 71 of the fixed base 7 is L. In this way, the moving stroke of the headrest relative to the fixed base 7 is HL. In the prior art, in order to ensure a sufficiently large moving stroke and the rigidity of the moving part 3, the overlap amount L is often designed to be sufficiently large, resulting in a corresponding opening height H of the headrest rear cover 10 is also very large. If the seat back shape is not high enough, when the headrest is moved to the highest position, the headrest opening will be exposed. However, in the two-way adjustable headrest mechanism of this embodiment, since the overlap amount between the fixed base 7 and the rear cover 10 is short, even if the moving stroke of the headrest is large enough, the opening size of the rear cover 10 can be reduced, and the headrest opening will not be exposed when the headrest is in the highest position, meeting the appearance requirements. It should be understood that if the overlap L is simply shortened directly, the headrest will be overhanging too much, and the rigidity of the headrest that can provide support will be lost. The utility model connects the moving part 3 with the fixed base 7 through the slider 8 to strengthen and supplement the rigidity. In this embodiment, a metal insert can be provided in the fixed base 7 to strengthen its rigidity. In fact, the fixed base 7 can also be directly provided by materials such as cast aluminum to ensure its rigidity.

[0056] like Fig. 22 and Fig.23 As shown, the steel wire 2 of the two-way adjustable headrest mechanism according to the present invention is replaced by a push plate 16 and a locking plate 19. The locking plate 19 is a locking part perpendicular to the moving direction of the push plate 16 and can be insert-molded or assembled together with the push plate 16 by a fixed method. Specifically, the push plate 16 is provided with a hook 161, and the moving part 17 is provided with a slot 171. The hook 161 is assembled in the slot 171. Fig.24 As shown, the button 12 is pushed, and the button pushes the push plate 16 to move, thereby driving the locking sheet 19 to disengage from the locking groove 721 to achieve unlocking.

[0057] like Fig.25 As shown, the steel wire 2 of the two-way adjustable headrest mechanism according to the present invention is replaced by a rotating shaft 18, a locking plate 19 and a cable 21. The locking plate 19 is used as a locking part and is molded together with the rotating shaft 18 or assembled together by a fixed manner. The two ends of the cable 21 are respectively connected to the rotating shaft 18 and the button 22. Fig.26 As shown, the cable 21 has a first end 211 and a second end 212 opposite to each other, the shaft 18 is provided with a hole 181 at a position offset from the axis, the button 22 has a hole 221, the first end 211 of the cable 21 is connected to the hole 181 of the shaft 18, and the second end 212 is connected to the hole 221 of the button 22. Fig. 27As shown, the rotating shaft 18 has two opposite ends 182, 183, and the moving component 20 has a hook 201 and a hole 202, and the ends 182, 183 are connected and installed with the hook 201 and the hole 202 respectively. Fig.28 As shown, by pressing the button 22, the cable 21 moves, pulling the shaft 18 to rotate, driving the locking plate 19 to rotate, and disengaging from the locking groove 721 to achieve unlocking.

[0058] like Fig.29 and Fig.30 As shown, the two-way adjustable headrest mechanism according to the utility model can realize electric adjustment. There are two mounting holes 231 on the fixed base 23. The screws 25 pass through the mounting holes 231 and are locked with the motor 24. The motor 24 has a screw 241. The rotation of the screw 241 drives the transmission nut 25 to move along the screw direction. The transmission nut 25 is connected to the moving part 3 by the screw 9, thereby driving the moving part 3 to move along the screw direction. It should be understood that the locking of the moving part 3 can be achieved by the self-locking of the motor 24 itself, so the locking groove 721 and the locking part can be omitted in this embodiment.

[0059] The above is only a preferred embodiment of the utility model, and is not intended to limit the scope of the utility model. The above embodiments of the utility model can also be modified in various ways. That is, all simple, equivalent changes and modifications made according to the claims and the contents of the specification of the utility model application fall within the scope of protection of the claims of the utility model patent. The conventional technical contents are not described in detail in the utility model.

Claims

1. A two-way adjustable headrest mechanism, characterized in that: The two-way adjustable headrest mechanism includes a moving component, a fixed base and a slider, wherein the fixed base is fixedly mounted on the seat back and has a guide rail, the moving component has a guide groove, the guide rail is inserted into the guide groove to realize the movement of the moving component on the fixed base, the fixed base also has a long groove, the slider is located on a side of the fixed base away from the moving component and is fixedly connected to the moving component in a manner of passing through the long groove.

2. The two-way adjustable headrest mechanism according to claim 1, characterized in that: The long slot is configured to extend longitudinally, and the fixed base further comprises a plurality of locking slots extending transversely and communicating with the long slot.

3. The two-way adjustable headrest mechanism according to claim 2, characterized in that: The two-way adjustable headrest mechanism also includes a locking member movably mounted on the moving component, the locking member having a locking portion, and as the moving component moves on the fixed base, the locking portion moves in the long slot and can move relative to the moving component to enter the locking slot for locking.

4. The two-way adjustable headrest mechanism according to claim 3, characterized in that: The two-way adjustable headrest mechanism also includes a locking spring, which acts on the locking member to keep the locking portion in the locking groove.

5. The two-way adjustable headrest mechanism according to claim 3, characterized in that: The slider has a transverse groove, and the locking portion is inserted into the transverse groove and can move in the transverse groove.

6. The two-way adjustable headrest mechanism according to claim 3, characterized in that: The locking member comprises a steel wire, and the locking portion is configured to be bent into a U-shape perpendicular to an extending direction of the steel wire.

7. The two-way adjustable headrest mechanism according to claim 3, characterized in that: The locking member comprises a push plate and a locking piece which are fixedly connected, and the locking portion is configured as the locking piece which is arranged perpendicular to the moving direction of the push plate.

8. The two-way adjustable headrest mechanism according to claim 3, characterized in that: The locking member comprises a rotating shaft and a locking plate which are fixedly connected, and a cable connected to the rotating shaft, and the locking portion is configured as the locking plate which can rotate with the rotating shaft under the action of the cable.

9. The two-way adjustable headrest mechanism according to claim 6, 7 or 8, characterized in that: The two-way adjustable headrest mechanism also includes a button, which acts on the steel wire or the push plate or the pull cable so that the locking portion escapes from the locking groove to achieve unlocking.

10. The two-way adjustable headrest mechanism according to claim 1, characterized in that: The two-way adjustable headrest mechanism also includes a motor and a transmission nut, wherein the motor is fixedly mounted on the fixed base, and the transmission nut is fixedly mounted on the moving component and cooperates with the screw thread of the motor.

11. The two-way adjustable headrest mechanism according to claim 1, characterized in that: The two-way adjustable headrest mechanism also includes a lubrication strip arranged between the guide groove and the guide rail.

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