An integrated seat headrest manual front and rear adjustment mechanism

Abstract

The present invention provides an integrated manual fore-and-aft adjustment mechanism for a seat headrest, comprising a retaining frame, a rotating frame, and a cover. The retaining frame is connected to the headrest rod and has a through-slot. The inner wall of the through-slot is circumferentially provided with a plurality of gear slots. The rotating frame includes a shaft body, which is rotatably connected to the through-slot and provided with a rib. The rib is limited and abuts against a gear slot. The cover shell covers the exterior of the retaining frame and is connected to a rotating drive column. The rotating drive column is inserted into the through-slot. A first elastic component is provided between the cover shell and the rotating frame, and a second elastic component is provided between the cover shell and the retaining frame. When the cover shell is pushed, the rotating drive column moves along the through-slot, driving the rotating frame to move along the through-slot first. When the rotating frame disengages the current gear slot, the rotating frame is driven to rotate until the rib is limited and abuts against another gear slot. The adjustment mechanism of the present application does not require a side unlocking button. The fore-and-aft gear can be adjusted by simply pushing the headrest, which is simple to operate and provides a good user experience.

Description

Technical Field

[0001] The invention relates to the technical field of motor vehicle headrests, and in particular to an integrated manual front-to-back adjustment mechanism for a seat headrest. Background Art

[0002] Car seat headrests are among the most important components in automotive parts, supporting and protecting the occupant's head. As consumers' demand for automotive comfort increases, a variety of headrests with different functions have emerged on the market, including sleeping headrests, music headrests, four-way adjustable headrests, six-way adjustable headrests, manual headrests, and electrically adjustable headrests. Traditionally, manual fore-and-aft headrests require unlocking a button on the side of the headrest to adjust the headrest, which is extremely inconvenient and unsightly. Therefore, there is an urgent need for an integrated manual headrest that can achieve fore-and-aft adjustment without the need for a side unlocking button. Summary of the Invention

[0003] The present application provides an integrated manual front and rear adjustment mechanism for the seat headrest, which does not require a side unlocking button. The front and rear positions can be adjusted by simply pushing the headrest. The operation is simple and the user experience is good.

[0004] In order to achieve the above-mentioned invention objectives, this application provides the following technical solutions:

[0005] An integrated seat headrest manual front and rear adjustment mechanism, comprising:

[0006] A retainer connected to the headrest rod, the retainer having a through slot, the inner wall of the through slot being provided with a plurality of gear slots along the circumference, the gear slots being located at different positions along the axis of the through slot;

[0007] A rotating bracket, the rotating bracket comprising a shaft body, the shaft body being rotatably connected to the through slot, the shaft body being provided with a rib, the rib being limited and abutted against one of the gear slots;

[0008] a cover shell, the cover shell covering the outside of the retaining frame, the cover shell being connected to a rotation drive column, the rotation drive column being inserted into the through slot, a first elastic component being provided between the cover shell and the rotating bracket, and a second elastic component being provided between the cover shell and the retaining frame;

[0009] When the cover is pushed, the rotation drive column moves along the through slot to drive the rotation bracket to move along the through slot and when the rotation bracket is out of the current gear slot, the rotation bracket is driven to rotate until the rib is limited to another gear slot.

[0010] Optionally, the rib is partially supported on the shift slot and partially extends out of the shift slot;

[0011] When the cover is pushed, the rotary drive shaft abuts against the portion of the rib extending out of the gear slot.

[0012] Optionally, a gear ring is provided at the end of the rotary drive column, and the gear ring includes a plurality of protruding teeth;

[0013] The end of the rib has a sharp corner;

[0014] When the cover shell is pushed, the inclined surface of the protruding tooth abuts against the sharp corner portion to drive the rotating bracket to rotate.

[0015] Optionally, the integrated seat headrest manual front and rear adjustment mechanism includes multiple groups of gear slots, each group of the gear slots is arranged in sequence along the circumference of the through slot, each group of the gear slots includes multiple gear slots arranged along the circumference of the through slot, and the height of each gear slot increases in sequence along the axial direction of the through slot, and multiple ribs are arranged on the shaft body along the circumference, and each of the ribs is respectively limited and supported on the corresponding gear slot on each group of gear slots.

[0016] Optionally, a reset rib is provided on the inner wall of the through groove between two adjacent groups of gear slots, and an obliquely extending guide groove is provided on the convex rib;

[0017] When the convex rib is limited and pressed against the highest gear slot, when the cover shell is pushed again and released, the rotating bracket moves back along the reset rib through the guide groove, and when the guide groove is separated from the reset rib, the first elastic component presses against the rotating bracket so that the convex rib is limited to the lowest gear slot.

[0018] Optionally, the rotary drive column has a hollow groove, and the rotary drive column is sleeved on the shaft.

[0019] Optionally, the cover shell includes a front cover shell and a rear cover shell, the front cover shell and the rear cover shell are snap-fitted together, the front cover shell is connected to a front sliding frame, the front sliding frame includes a first connecting plate and a first guide shaft connected to the first connecting plate, the first connecting plate and the front cover shell are connected and fixed, the rotating bracket has a through groove, the first guide shaft is inserted into the through groove and the hollow groove, the first elastic component includes a first spring, the first spring is sleeved on the first guide shaft, and the two ends of the first spring respectively press against the first connecting plate and the rotating bracket.

[0020] Optionally, the rotating bracket has an annular step groove circumferentially arranged around the through groove;

[0021] One end of the first spring abuts against the annular step groove.

[0022] Optionally, a rear sliding frame is connected to the rear cover, and the rear sliding frame includes a rear connecting plate and the rotary drive column. The rear connecting plate is connected to the rear cover, and the rotary drive shaft is connected to the rear connecting plate.

[0023] Optionally, two guide holes are provided on the retaining frame, and the rear sliding frame further comprises two guide posts connected to the rear connecting plate, the guide posts are inserted into the guide holes, and the second elastic component comprises two second springs, the two second springs are respectively mounted on the corresponding guide posts, and the two ends of the second spring respectively press against the rear connecting plate and the retaining frame.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] The adjustment mechanism of the present application does not require a side unlocking button. The front and rear positions can be adjusted by simply pushing the headrest. The operation is simple and the user experience is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0027] Figure 1 is an exploded view of an adjustment mechanism provided by an embodiment of the present invention;

[0028] Figure 2 This is an assembly diagram of the front cover and the front sliding frame of the adjustment mechanism provided by an embodiment of the present invention being fixed by screws;

[0029] Figure 3 is a three-dimensional structural diagram of a retaining frame of an adjustment mechanism provided by an embodiment of the present invention;

[0030] Figure 4 yes Figure 3 Front view of

[0031] Figure 5 yes Figure 4 Middle AA section view;

[0032] Figure 6 This is an assembly diagram of the rear cover and the rear sliding frame of the present invention fixed by screws;

[0033] Figure 7 It is a front view of the adjustment mechanism of the present invention;

[0034] Figure 8 yes Figure 7 BB cross-sectional view;

[0035] Figure 9 Schematic diagram of the matching structure of the rear sliding frame, the front sliding frame and the retaining frame in the present invention;

[0036] Figure 10 It is a schematic diagram of the coordinated structure of the rear sliding frame, the front sliding frame and the steering bracket in the present invention.

[0037] In the figure, 1, rear cover shell; 2, rear sliding frame; 3, retaining frame; 4, rotating bracket; 41, convex rib; 4a, guide groove; 5, headrest foam; 6, face cover; 7, front sliding frame; 8, front cover shell; 9, second elastic component; 10, first elastic component; 11, rear cover shell screw; 12, front cover shell screw; 13, headrest rod; 2a, gear ring; 2b, guide column; 3a, gear slot; 3b, reset rib; 3c, second hole slot; 3d, first hole slot; 7a, first guide shaft; 7b, cross pin. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] See also Figures 1 to 10As shown, an embodiment of the present application provides an integrated seat headrest manual front and rear adjustment mechanism, comprising: a retaining frame 3, a rotating bracket 4 and a cover. The retaining frame 3 is connected to the headrest rod 13, and the retaining frame 3 has a through slot. The inner wall of the through slot is provided with a plurality of gear slots 3a along the circumference, and each gear slot 3a has a different position along the axis of the through slot (i.e., a different height position). The rotating bracket 4 includes a shaft body, which is rotatably connected to the through slot. The shaft body is provided with a rib 41, and the rib 41 is limited and abuts against one of the gear slots 3a. The cover covers the outside of the retaining frame 3, and the cover is connected to a rotation drive column, which is inserted into the through slot. A first elastic component 10 is provided between the cover and the rotating bracket 4, and a second elastic component 9 is provided between the cover and the retaining frame 3. When the cover is pushed, the rotation drive column moves along the through slot to drive the rotation bracket 4 to move along the through slot and when the rotation bracket 4 leaves the current gear slot, the rotation bracket 4 is driven to rotate until the rib 41 is limited to another gear slot.

[0042] The adjustment mechanism of the present application does not require a side unlocking button. The front and rear positions can be adjusted by simply pushing the headrest. The operation is simple and the user experience is good.

[0043] In a possible embodiment, the rib is partially supported on the shift slot 3a and partially extends out of the shift slot 3a. When the cover is pushed, the rotary drive shaft abuts against the portion of the rib extending out of the shift slot 3a.

[0044] See also Figure 6 As shown, in one possible embodiment, a gear ring 2a is provided at the end of the rotary drive column. The gear ring 2a includes a plurality of protruding teeth. The protruding ribs have sharp corners at their ends. When the cover is pushed, the inclined surfaces of the protruding teeth abut against the sharp corners, driving the rotating bracket 4 to rotate.

[0045] In one possible embodiment, the integrated headrest manual fore-aft adjustment mechanism includes multiple groups of shift slots 3a, each group of which is sequentially arranged along the circumference of the through-slot. Each group of shift slots 3a includes multiple shift slots 3a arranged along the circumference of the through-slot, with each shift slot 3a increasing in height along the axis of the through-slot. The shaft body is provided with multiple ribs along the circumference, each rib being supported on a corresponding shift slot 3a in each group of shift slots 3a. The number of shift slots 3a and their axial position within each group of shift slots 3a are consistent. By providing multiple groups of shift slots 3a, each rib of the shaft body is supported on its corresponding shift slot 3a, improving structural stability.

[0046] In one possible embodiment, a reset rib 3b is provided on the inner wall of the through slot, between two adjacent groups of gear slots 3a, and an obliquely extending guide groove 4a is provided on the rib 41. When the rib 41 is restrained and abutted against the highest gear slot, the rotatable bracket 4 returns to its original position along the reset rib 3b via the guide groove 4a during the process of pushing the cover again and releasing it. When the guide groove 4a disengages from the reset rib 3b, i.e., when it passes the lower end of the reset rib 3b, the first elastic member 10 abuts against the rotatable bracket 4, restraining the rib 41 in the lowest gear slot.

[0047] The reset rib 3b allows the rotating bracket 4 to be reset quickly and accurately, and also allows the adjustment mechanism of the present application to adjust the gear position cyclically.

[0048] The rotary drive column has a hollow groove, and the rotary drive column is sleeved on the shaft. The hollow groove plays a guiding role, facilitating the precise positioning of the convex teeth on the rotary drive column and the sharp corners of the convex ribs on the rotating bracket 4.

[0049] See also Figure 1 and Figure 2 As shown, in a possible embodiment, the cover shell includes a front cover shell 8 and a rear cover shell 1, and the front cover shell 8 and the rear cover shell 1 are snap-fitted together. A front sliding frame 7 is connected to the front cover shell 8, and the front sliding frame 7 includes a first connecting plate and a first guide shaft 7a connected to the first connecting plate. The first connecting plate and the front cover shell 8 are connected and fixed, and the rotating bracket 4 has a through groove, and the first guide shaft 7a is inserted into the through groove and the hollow groove. The first elastic component 10 includes a first spring, and the first spring is sleeved on the first guide shaft 7a. The two ends of the first spring respectively press against the first connecting plate and the rotating bracket 4.

[0050] See also Figure 6 As shown, in a possible embodiment, the rotating bracket 4 has an annular step groove circumferentially arranged around the through groove. One end of the first spring abuts against the annular step groove.

[0051] The rear cover 1 is connected to a rear sliding frame 2 , and the rear sliding frame 2 includes a rear connecting plate and the rotary drive column. The rear connecting plate is connected to the rear cover 1 , and the rotary drive shaft is connected to the rear connecting plate.

[0052] Optionally, the retaining frame 3 is provided with two guide holes, and the rear sliding frame 2 further includes two guide posts 2b connected to the rear connecting plate. The guide posts 2b are inserted into the guide holes. The second elastic component 9 includes two second springs, each of which is sleeved on a corresponding guide post 2b, and the ends of the second springs respectively abut against the rear connecting plate and the retaining frame 3. The provision of the guide posts 2b and the guide holes serves as a guide to prevent positioning and improve the operational stability of the mechanism. Figure 5 As shown, the guide hole of the retaining frame 3 may include a first hole groove 3d and a second hole groove 3c, the diameter of the first hole groove 3d is larger than the second hole groove 3c, an annular step is formed between the first hole groove 3d and the second hole groove 3c, and one end of the second spring abuts against the annular step.

[0053] Among them, see Figure 2 As shown, two cross pins 7b can be further provided on the front sliding frame 7, and the two cross pins 7b are respectively inserted into the corresponding guide holes. The guide column 2b can be a hollow structure, and the cross pins 7b are further inserted into the interior of the guide column 2b.

[0054] The adjustment mechanism of the present application may further include a headrest foam 5 and a face cover 6. The headrest foam 5 is coated on the outside of the cover, and the face cover 6 may be coated on the outside of the headrest foam 5.

[0055] The following provides the assembly production steps of the adjustment mechanism of this application:

[0056] Step 1: Insert-injection-molding the retainer 3 and the headrest rod 13;

[0057] Step 2: The rear cover 1 and the rear sliding frame 2 are fixedly installed by the rear cover screws 11;

[0058] Step 3: The front cover 8 and the front sliding frame 7 are fixedly installed by the front cover screws 12;

[0059] Step 4: Install the first elastic component 10 and the rotating bracket 4 on the first guide shaft 7a of the front sliding frame 7 in sequence;

[0060] Step 5: Place the second elastic component 9 on the guide post 2b of the rear sliding bracket. Simultaneously, insert the assembled subassembly into the central slot of the retaining frame 3. The rear sliding bracket guide post 2b will be inserted into the second slot 3c of the retaining frame 3, and the cross pin 7b of the front sliding frame 7 will be inserted into the interior of the guide post 2b. The second elastic component 9 will abut against the annular step between the first slot 3d and the second slot 3c.

[0061] Step 6: Fix the claws around the front cover 8 into the corresponding slots of the rear cover 1.

[0062] Step 7: Finally, install the foam 5 and the face cover 6 in sequence.

[0063] The principle of the regulating mechanism of this application is described in detail below:

[0064] The headrest rod 13 is fixed to the seat, and the retaining frame 3 and the headrest rod 13 are insert-molded. They can be fixed as one, or the retaining frame 3 can be moved along the headrest rod 13 to adjust the height. The rear cover 1 and the rear sliding frame 2 are fixedly installed by the rear cover screws 11. The front cover 8 and the front sliding frame 7 are fixedly installed by the front cover screws 12. The claws around the front cover 8 are fixed in the corresponding slots of the rear cover 1. Therefore, the rear cover 1, the rear sliding frame 2, the front sliding frame 7, the front cover 8, the rear cover screws, and the front cover screws are fixed together and will move together.

[0065] When a forward force is applied to the rear cover 1, it is equivalent to Figure 8 When the rear sliding frame 2 applies a forward force, the rear cover 1 will move forward, because there is a certain distance between the front toothed ring 2a of the rear sliding frame 2 and the rotating bracket 4. The rotating bracket 4 will remain stationary under the action of the first elastic component 10 between the front sliding frame 7 and the rotating bracket 4. When the front toothed ring 2a of the rear sliding frame 2 contacts the rotating bracket 4, the rear sliding frame 2 will push the rotating bracket 4 to move forward along the through slot of the retaining frame 3. When the lower end point of the rotating bracket 4 passes the apex of the gear slot of the retaining frame 3, due to the inclined surface of the convex teeth on the toothed ring 2a of the rear sliding frame 2, the convex rib 41 of the rotating bracket 4 will rotate around the first guide shaft 7a. At this time, the first gear operation is completed. When the hand is released, see Figure 9 When no force is applied to the rear sliding frame 2, the rear sliding frame 2 will move backward under the action of the second elastic component 9, and the front sliding frame 7 will also drive the rotating bracket 4 to move backward until the convex rib of the rotating bracket 4 is fully engaged with the gear slot 3a in the retaining frame 3 and stops moving. At this time, the first gear adjustment is completed. Similarly, the second and third gears can be adjusted forward. After the third gear adjustment is completed, the forward force is continued to be applied, and the rotating bracket 4 will cross the gear slot 3a at the top of the retaining frame 3 and move backward along it under the constraint of the reset rib 3b. When the guide groove 4a of the rotating bracket 4 passes the lower end of the reset rib 3b, it returns to the designed position under the action of the first elastic component 10 and the second elastic component 9, completing one function.

[0066] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. An integrated seat headrest manual front and rear adjustment mechanism, characterized in that: include: A retainer connected to the headrest rod, the retainer having a through slot, the inner wall of the through slot being provided with a plurality of gear slots along the circumference, the gear slots being located at different positions along the axis of the through slot; A rotating bracket, the rotating bracket comprising a shaft body, the shaft body being rotatably connected to the through slot, the shaft body being provided with a rib, the rib being limited and abutted against one of the gear slots; a cover shell, the cover shell covering the outside of the retaining frame, the cover shell being connected to a rotation drive column, the rotation drive column being inserted into the through slot, a first elastic component being provided between the cover shell and the rotating bracket, and a second elastic component being provided between the cover shell and the retaining frame; When the cover is pushed, the rotation drive column moves along the through slot to drive the rotation bracket to move along the through slot and when the rotation bracket leaves the current gear slot, the rotation bracket is driven to rotate until the rib is limited to another gear slot; Multiple groups of gear slots, each group of gear slots is sequentially arranged along the circumference of the through slot, each group of gear slots includes multiple gear slots arranged along the circumference of the through slot, and the height of each gear slot along the axial direction of the through slot increases sequentially, and multiple ribs are provided on the shaft body along the circumference, and each rib is respectively limited and supported on the corresponding gear slot of each group of gear slots; A reset rib is provided on the inner wall of the through groove between two adjacent groups of gear slots, and an inclined guide groove is provided on the convex rib; When the convex rib is limited and pressed against the highest gear slot, when the cover shell is pushed again and released, the rotating bracket moves back along the reset rib through the guide groove, and when the guide groove is separated from the reset rib, the first elastic component presses against the rotating bracket so that the convex rib is limited to the lowest gear slot.

2. The integrated seat headrest manual front and rear adjustment mechanism according to claim 1, characterized in that: The convex rib is partially supported by the shift slot and partially extends out of the shift slot; When the cover is pushed, the rotary drive column abuts against the portion of the rib extending out of the gear slot.

3. The integrated seat headrest manual front and rear adjustment mechanism according to claim 1, characterized in that: A gear ring is provided at the end of the rotary drive column, and the gear ring includes a plurality of protruding teeth; The end of the rib has a sharp corner; When the cover shell is pushed, the inclined surface of the protruding tooth abuts against the sharp corner portion to drive the rotating bracket to rotate.

4. The integrated seat headrest manual front and rear adjustment mechanism according to claim 1, characterized in that: The rotation driving column has a hollow groove, and the rotation driving column is sleeved on the shaft body.

5. The integrated seat headrest manual front and rear adjustment mechanism according to claim 4, characterized in that: The cover shell includes a front cover shell and a rear cover shell, and the front cover shell and the rear cover shell are snap-fitted together. A front sliding frame is connected to the front cover shell, and the front sliding frame includes a first connecting plate and a first guide shaft connected to the first connecting plate. The first connecting plate and the front cover shell are connected and fixed, and the rotating bracket has a through groove, and the first guide shaft is inserted into the through groove and the hollow groove. The first elastic component includes a first spring, and the first spring is sleeved on the first guide shaft. The two ends of the first spring respectively press against the first connecting plate and the rotating bracket.

6. The integrated seat headrest manual front and rear adjustment mechanism according to claim 5, characterized in that: The rotating bracket has an annular step groove arranged circumferentially around the through groove; One end of the first spring abuts against the annular step groove.

7. The integrated seat headrest manual front and rear adjustment mechanism according to claim 5, characterized in that: The rear cover is connected to a rear sliding frame, which includes a rear connecting plate and the rotation driving column. The rear connecting plate is connected to the rear cover, and the rotation driving column is connected to the rear connecting plate.

8. The integrated seat headrest manual front and rear adjustment mechanism according to claim 7, characterized in that: Two guide holes are provided on the retaining frame, and the rear sliding frame further includes two guide posts connected to the rear connecting plate, and the guide posts are inserted into the guide holes. The second elastic component includes two second springs, and the two second springs are respectively sleeved on the corresponding guide posts, and the two ends of the second spring respectively press against the rear connecting plate and the retaining frame.

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