CN220114508U - Unlocking driving mechanism for turning over headrest - Google Patents
Unlocking driving mechanism for turning over headrest Download PDFInfo
- Publication number
- CN220114508U CN220114508U CN202320950729.XU CN202320950729U CN220114508U CN 220114508 U CN220114508 U CN 220114508U CN 202320950729 U CN202320950729 U CN 202320950729U CN 220114508 U CN220114508 U CN 220114508U
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- China
- Prior art keywords
- headrest
- wire harness
- connecting piece
- unlocking
- surface structure
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- 239000002184 metal Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 abstract description 7
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
The utility model relates to the technical field of automobile seats, in particular to an unlocking driving mechanism for turning a headrest, which comprises a headrest, a backrest framework, a wire harness and a connecting piece, wherein the connecting piece is fixed on the inner side of the backrest framework, an arc surface structure of the connecting piece is sleeved outside a rotating shaft of an angle adjuster, one end of the wire harness is connected with an unlocking end of a headrest locking mechanism, the other end of the wire harness is connected with a seat cushion framework after passing through the connecting piece, and the wire harness in the connecting piece butts against the arc surface structure of the connecting piece. Compared with the prior art, the utility model designs the unlocking driving mechanism for turning the headrest, and the cambered surface structure of the connecting piece props against the wire harness and lengthens the wire harness in the rotating process of the connecting piece along with the angle adjuster, so that the locking mechanism of the headrest is driven to unlock, and the turning of the headrest is realized; the unlocking stroke and the arrangement environment of different headrests can be adapted by adjusting the cambered surface structure of the connecting piece; the utility model has the advantages of simple structure, less parts, low cost and less space requirement.
Description
Technical Field
The utility model relates to the technical field of automobile seats, in particular to an unlocking driving mechanism for turning a headrest.
Background
With diversification of automobile use scenes, the use scenes of the space in the automobile become more flexible and changeable. If the back is overturned and has the headrest folding function under the condition that the back row is free from sitting, more space can be reserved in the vehicle; if the headrest folding function is applied to the front seat, a larger visual field space can be provided for rear passengers.
At present, a common headrest folding mechanism in the market is capable of folding a headrest by folding a backrest and driving a connecting rod. The disadvantages of this structure are: the connecting rod has complex structure, large space requirement, electric drive unlocking and incapability of controlling the designated stroke of the headrest.
Accordingly, there is a need to design an unlocking drive mechanism for headrest folding to meet the reduced part count and space requirements.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides an unlocking driving mechanism for turning over a headrest, so as to meet the requirements of reducing the number of parts and space.
In order to achieve the above purpose, the utility model provides an unlocking driving mechanism for turning a headrest, which comprises a headrest, a backrest framework, a wire harness and a connecting piece, wherein the connecting piece is fixed on the inner side of the backrest framework, the cambered surface structure of the connecting piece is sleeved outside a rotating shaft of an angle adjuster, one end of the wire harness is connected with an unlocking end of a headrest locking mechanism, the other end of the wire harness is connected with a seat cushion framework after passing through the connecting piece, and the wire harness in the connecting piece butts against the cambered surface structure of the connecting piece.
The connecting piece still be equipped with the fixed bolster, the excircle face and the fixed bolster of cambered surface structure are connected, the notch that the end passed the fixed bolster of pencil.
The wire harness is sleeved with a sleeve, and the sleeve is fixed with the notch of the fixed support.
The connecting line I from the lower end of the wire harness to the contact point of the wire harness and the cambered surface structure is tangent to the track surface of the cambered surface structure, and the connecting line II from the wire harness in the sleeve to the contact point of the cambered surface structure is tangent to the track surface of the cambered surface structure.
The arc length of the track surface is matched with the unlocking stroke of the headrest.
The arc shape of the track surface is an arc, an involute or an ellipse.
The side face and/or the back face of the fixing support and the backrest framework are/is fixed by a plurality of fasteners.
When the overturning stroke of the backrest framework reaches the unlocking angle of the headrest locking mechanism, the first-stage pulling-out length H1 of the wire harness is larger than the stroke A1 required for unlocking the headrest, and when the backrest framework reaches the overturning limit position, the second-stage pulling-out length H2 of the wire harness is smaller than the headrest unlocking and retaining stroke A2.
The wire harness and the seat cushion framework are provided with an angle adjuster lower connecting plate and a fixed metal plate, the angle adjuster lower connecting plate is arranged at the rear end of the seat cushion framework, the angle adjuster lower connecting plate is provided with the fixed metal plate, and the end of the wire harness is clamped into the through hole of the fixed metal plate.
The swing angle of the fixed metal plate is smaller than 5 degrees.
Compared with the prior art, the utility model designs the unlocking driving mechanism for turning the headrest, and the cambered surface structure of the connecting piece props against the wire harness and lengthens the wire harness in the rotating process of the connecting piece along with the angle adjuster, so that the locking mechanism of the headrest is driven to unlock, and the turning of the headrest is realized; the unlocking stroke and the arrangement environment of different headrests can be adapted by adjusting the cambered surface structure of the connecting piece; the utility model has the advantages of simple structure, less parts, low cost and less space requirement.
Drawings
FIG. 1 is a schematic diagram of the present utility model.
Fig. 2 is an enlarged view of the utility model at a of fig. 1.
Fig. 3 is a schematic view of the connection of the harness to the headrest locking mechanism in the present utility model.
Fig. 4 is a schematic view of a wire harness and a connector according to the present utility model.
Fig. 5 is a cross-sectional view of a wire harness and a fixing sheet metal in the present utility model.
Fig. 6 is a schematic view showing the fixing of the side and back surfaces of the fixing bracket to the back frame in the present utility model.
Fig. 7 is a schematic view showing the fixing of the side surface of the fixing bracket to the backrest frame in the present utility model.
FIG. 8 is a schematic view of the trace surface of the connector according to the present utility model.
Fig. 9 is a schematic view of a first-stage harness pull-out length H1 and a headrest unlocking required stroke A1 in the present utility model.
Fig. 10 is a schematic view of the harness second stage pull-out length H2, the headrest unlock holding stroke A2 in the present utility model.
FIG. 11 is a schematic view of a track surface with a longer arc in the present utility model.
FIG. 12 is a schematic view of a track surface with shorter camber in the present utility model.
FIG. 13 is a schematic view of a track surface with different arc combinations according to the present utility model.
Fig. 14 is a schematic view of a seat in which the present utility model is installed in a design position.
FIG. 15 is a schematic view of the present utility model in a design position.
Fig. 16 is a schematic view of a seat incorporating the present utility model flipped forward to a headrest unlocked position.
Fig. 17 is a schematic view of the present utility model in the headrest unlocked position.
Fig. 18 is a schematic view of the seat of the present utility model mounted with the seat flipped forward to the extreme position.
Fig. 19 is a schematic view of the present utility model in the extreme position.
Fig. 20 is a schematic view of a seat incorporating the present utility model flipped back and reset to a design position.
Detailed Description
The utility model will now be further described with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, the utility model provides an unlocking driving mechanism for turning a headrest, which comprises a headrest, a backrest framework 4, a wire harness 1 and a connecting piece 3, wherein the connecting piece 3 is fixed on the inner side of the backrest framework 4, an arc surface structure 31 of the connecting piece 3 is sleeved outside a rotating shaft of an angle adjuster 5, one end of the wire harness 1 is connected with an unlocking end 21 of a headrest locking mechanism 2, the other end of the wire harness 1 passes through the connecting piece 3 and then is connected with a seat cushion framework, and the wire harness 1 in the connecting piece 3 props against the arc surface structure 31 of the connecting piece 3.
Referring to fig. 4, the connecting member 3 is further provided with a fixing bracket 32, and the outer circumferential surface of the arc surface structure 31 is connected with the fixing bracket 32, and the end 11 of the wire harness 1 passes through the notch of the fixing bracket 32. The wire harness 1 is sleeved with the sleeve 12, the sleeve 12 is fixed with the notch of the fixed bracket 32, and the wire harness 1 can slide in the sleeve 12. The structure of the fixing bracket 32 can be adjusted according to different fixing positions, and the fixing mode of the fixing bracket 32 and the backrest frame 4 is also realized.
Referring to fig. 5, an angle adjuster lower connecting plate 51 and a fixed metal plate 7 are arranged between the wire harness 1 and the seat cushion framework, the angle adjuster lower connecting plate 51 is arranged at the rear end of the seat cushion framework, the angle adjuster lower connecting plate 51 is provided with the fixed metal plate 7, and the end 11 of the wire harness 1 is clamped into a through hole of the fixed metal plate 7, so that the lower end of the wire harness 1 is fixed. In the overturning process of the backrest framework 4, the swinging angle of the fixed metal plate 7 is smaller than 5 degrees, and the durable strength of the fixed point at the lower end of the wire harness 1 is ensured.
The fixing manner of the fixing bracket 32 and the backrest frame 4 is various, and the side and/or back of the fixing bracket 32 and the backrest frame 4 are fixed by a plurality of fasteners 6. As shown in fig. 6, the side and back surfaces of the fixing bracket 32 are fixed to the back frame 4; as shown in fig. 7, the side surface of the fixed bracket 32 is fixed to the back frame 4.
Referring to fig. 8, a first connecting line 13 from the lower end of the wire harness 1 to the contact point of the wire harness 1 and the cambered surface structure 31 is tangent to a track surface 311 of the cambered surface structure 31, a second connecting line 14 from the contact point of the wire harness 1 and the cambered surface structure 31 in the sleeve 12 is tangent to the track surface 311 of the cambered surface structure 31, and the wire harness 1 is always in a tangent state in the rotating process of the backrest framework 4, so that the folding durability of the wire harness 1 is ensured, and the wire harness 1 is prevented from being broken due to the folding angle generated by rotation.
Referring to fig. 9, the stroke of the back frame 4 from the design position 8 to the headrest-unlocking position 9 is a stroke A1 required for headrest unlocking, and in this process, the wire harness is lengthened by a first-stage harness pullout length H1. In the unlocking process that one end of the wire harness 1 pulls the unlocking end 21 of the headrest locking mechanism 2, when the overturning stroke of the backrest framework 4 reaches the unlocking angle of the headrest locking mechanism 2, as the backrest overturning is started by a section of idle stroke, the length H1 of the wire harness pulled out in the first stage is larger than the stroke A1 required for unlocking the headrest, and thus, the headrest unlocking function can be ensured to be completed when the backrest overturning angle is set.
Referring to fig. 10, the stroke of the back frame 4 from the headrest unlock position 9 to the limit position 10 is a headrest unlock holding stroke A2, in which the harness is lengthened by a harness second stage pull-out length H2. When the backrest framework 4 reaches the turning limit position, the pulling length H2 of the wire harness in the second stage is less than the headrest unlocking and retaining stroke A2. Because the headrest travel is set to a fixed value, when the backrest framework 4 reaches the turning limit position 10 from the headrest unlocking position 9, the continuous pulling-out length of the wire harness 1 cannot exceed the headrest unlocking holding travel, and the separation track of the cambered surface structure 31 needs to be weakened at the moment, namely the corresponding arc length of the track surface 311 of the cambered surface structure 31 is reduced, so that the continuous pulling-out length of the wire harness 1 is controlled, and the protection of the headrest mechanism is realized.
The arc length of the track surface 311 matches the headrest unlocking stroke. In order to adapt to different headrest unlocking strokes, the arc length of the track surface 311 is changed, and if the headrest unlocking stroke is larger, the arc length of the track surface 311 is increased, as shown in fig. 11. The smaller the headrest unlock stroke, the smaller the arc length of the trajectory surface 311, as shown in fig. 12.
The headrest unlocking stroke is fixed, if the headrest is required to be unlocked in the front stage of the overturning stroke of the backrest framework 4, namely the arc length of the front end track surface 311 is required to be increased, so that more wire harness strokes can be pulled out by the same angle of backrest overturning in the front stage of the overturning stroke, and the headrest is unlocked in advance. However, if only the arc length of the front end track surface 311 is increased, the backrest frame 4 continues to turn over the headrest after the headrest is unlocked, and the requirement for the harness travel is not to exceed the headrest unlocking limit travel, at this time, the arc length of the rear end track surface 311 needs to be reduced, that is, the track surface 311 is designed to be an arc with a large front and a small rear, as shown in fig. 13, so that the continuous pull-out length of the harness 1 does not exceed the headrest unlocking limit unlocking travel in the travel of turning over the backrest to the limit position after the headrest is unlocked, thereby ensuring that the headrest is unlocked in the early stage of the turning-over travel and avoiding the damage of the headrest unlocking mechanism. In addition, the arc shape of the track surface 311 can be designed into an arc, an involute or an ellipse according to different working conditions and use scenes.
When the seat is installed, after the wire harness 1, the connecting piece 3 and the headrest locking mechanism 2 are preassembled, the headrest is installed on the top of the backrest framework 4, the connecting piece 3 is installed on the inner side of the backrest framework 4 through the fastening piece 6, the space requirement is low, and the extra space of the seat is not occupied.
Referring to fig. 14 and 15, in the design position, the back frame 4 is not rotated, the harness 1 does not apply a force to the unlocking end 21 of the headrest locking mechanism 2, and as shown in fig. 3, the pawl 23 is kept locked with the ratchet 22, and the headrest is in the locked state.
When the seat turns forward, the end 11 of the wire harness 1 is fixed and kept still, the angle adjuster 5 drives the connecting piece 3 to rotate, the cambered surface structure 31 of the connecting piece 3 butts against the wire harness 1, and the wire harness 1 positioned in the sleeve 12 is pulled out. Referring to fig. 16 and 17, when the seat reaches the headrest unlocking position, the harness 1 pulls the unlocking end 21 of the headrest locking mechanism 2, and the unlocking end 21 drives the pawl 23 to rotate, so that the pawl 23 is separated from the ratchet 22, and the headrest is unlocked and turned down.
Referring to fig. 18 and 19, the seat is continuously turned forward to the limit position, the harness 1 is continuously elongated by the force, and at this time, the headrest locking mechanism 2 is kept in the unlocked state, and the headrest is kept in the turned-down state until the back frame 4 is turned to the limit position.
Referring to fig. 20, when the seat is turned back and reset to the design position, the wire harness 1 in the connecting piece 3 generates redundancy, the force of the wire harness 1 acting on the unlocking end 21 is reduced, the spring drives the pawl 23 to reset gradually, the pawl 23 withdraws the redundant wire harness 1 in the connecting piece 3 through the unlocking end 21, and the wire harness 1 is prevented from being bent and broken for a long time. Finally, the headrest is manually returned to the locked position, i.e., the seat and headrest are returned to the design position as shown in fig. 14.
The utility model designs an unlocking driving mechanism for turning the headrest, and in the process that the connecting piece rotates along with the angle adjuster, the cambered surface structure of the connecting piece props against the wire harness and lengthens the wire harness, so that the unlocking of the headrest locking mechanism is driven, and the turning of the headrest is realized; the unlocking stroke and the arrangement environment of different headrests can be adapted by adjusting the cambered surface structure of the connecting piece; the utility model has the advantages of simple structure, less parts, low cost and less space requirement.
Claims (10)
1. An unblock actuating mechanism for headrest turns over, includes headrest, back skeleton, pencil, connecting piece, its characterized in that: the connecting piece (3) is fixed in the inboard of back skeleton (4), and outside angle modulation ware (5) pivot is established to cambered surface structure (31) cover of connecting piece (3), one end of pencil (1) is connected with unlocking end (21) of headrest locking mechanism (2), and behind connecting piece (3), is connected with the seatpad skeleton to the other end of pencil (1), and pencil (1) in connecting piece (3) support cambered surface structure (31) of connecting piece (3).
2. An unlock drive mechanism for a headrest fold as claimed in claim 1 wherein: the connecting piece (3) is also provided with a fixed support (32), the outer circular surface of the cambered surface structure (31) is connected with the fixed support (32), and the end (11) of the wire harness (1) penetrates through the notch of the fixed support (32).
3. An unlock drive mechanism for a headrest fold as claimed in claim 2 wherein: the wire harness (1) is sleeved with a sleeve (12), and the sleeve (12) is fixed with a notch of the fixed support (32).
4. An unlock drive mechanism for a headrest fold as claimed in claim 1 or 3 wherein: the connecting line I (13) from the lower end of the wire harness (1) to the contact point of the wire harness (1) and the cambered surface structure (31) is tangent to the track surface (311) of the cambered surface structure (31), and the connecting line II (14) from the contact point of the wire harness (1) in the sleeve (12) and the cambered surface structure (31) is tangent to the track surface (311) of the cambered surface structure (31).
5. An unlock drive mechanism for a headrest fold as claimed in claim 4 wherein: the arc length of the track surface (311) is matched with the unlocking stroke of the headrest.
6. An unlock drive mechanism for a headrest fold as claimed in claim 4 wherein: the arc shape of the track surface (311) is an arc, an involute or an ellipse.
7. An unlock drive mechanism for a headrest fold as claimed in claim 2 wherein: the side face and/or the back face of the fixing bracket (32) and the backrest framework (4) are/is fixed by a plurality of fasteners (6).
8. An unlock drive mechanism for a headrest fold as claimed in claim 1 wherein: when the overturning stroke of the backrest framework (4) reaches the unlocking angle of the headrest locking mechanism (2), the length H1 pulled out of the wire harness in the first stage is larger than the stroke A1 required by the headrest unlocking, and when the backrest framework (4) reaches the overturning limit position, the length H2 pulled out of the wire harness in the second stage is smaller than the headrest unlocking maintaining stroke A2.
9. An unlock drive mechanism for a headrest fold as claimed in claim 1 wherein: the wire harness (1) and the seat cushion framework are provided with an angle adjuster lower connecting plate (51) and a fixed metal plate (7), the angle adjuster lower connecting plate (51) is arranged at the rear end of the seat cushion framework, the angle adjuster lower connecting plate (51) is provided with the fixed metal plate (7), and the end (11) of the wire harness (1) is clamped into the through hole of the fixed metal plate (7).
10. An unlock drive mechanism for a headrest fold as claimed in claim 9 wherein: the swing angle of the fixed metal plate (7) is smaller than 5 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320950729.XU CN220114508U (en) | 2023-04-25 | 2023-04-25 | Unlocking driving mechanism for turning over headrest |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320950729.XU CN220114508U (en) | 2023-04-25 | 2023-04-25 | Unlocking driving mechanism for turning over headrest |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220114508U true CN220114508U (en) | 2023-12-01 |
Family
ID=88912654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320950729.XU Active CN220114508U (en) | 2023-04-25 | 2023-04-25 | Unlocking driving mechanism for turning over headrest |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220114508U (en) |
-
2023
- 2023-04-25 CN CN202320950729.XU patent/CN220114508U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |