Headrest folding mechanism and automobile seat

Abstract

The utility model provides a headrest folding mechanism and an automobile seat, and relates to the technical field of automobile seat accessories. The headrest folding mechanism comprises a headrest folding frame, a locking assembly and a fixed base; the headrest folding frame is rotatably installed on the fixed base, a headrest spring bolt used for being matched with the locking assembly is arranged on the headrest folding frame, the headrest spring bolt and the headrest folding frame are relatively fixed, a first reset torsion spring is arranged on the headrest folding frame, one end of the first reset torsion spring is connected with the headrest spring bolt, and the other end of the first reset torsion spring is connected with the fixed base; the locking assembly comprises an unlocking shaft, a gap spring bolt and a locking spring bolt, the unlocking shaft is rotatably installed on the fixed base and connected with an unlocking inhaul cable, the unlocking shaft is fixedly sleeved with the locking spring bolt, and the unlocking shaft is slidably sleeved with the gap spring bolt. The automobile seat comprises the headrest folding mechanism. The technical effect that the headrest cannot shake after being locked is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seat accessories, in particular to a headrest folding mechanism and an automobile seat. Background Art

[0002] Ordinary car seat headrests are mostly adjusted up and down. With the diversification of car seat usage scenarios, such as the backrest being folded flat to form a bed mode, the headrest affects the folding of the seat, so the headrest needs to be removed. At this time, for the convenience of operation, a foldable headrest is needed. Due to its high convenience and large space utilization, it has been widely used in various types of cars.

[0003] However, the folding mechanism of vehicle seats currently on the market generally has a large shake (gap) of the headrest after locking. The existing headrest folding mechanism is cumbersome to operate when unlocking and folding. The unstable situation of the locking mechanism after locking may cause accidental flipping. The adjustment is not smooth, and in severe cases, it may even cause injuries to the occupants. Safety cannot be guaranteed, resulting in a poor user experience. Utility Model Content

[0004] The utility model aims to provide a headrest folding mechanism and a car seat, so as to alleviate the technical problem of the headrest shaking after being locked in the prior art.

[0005] In a first aspect, an embodiment of the utility model provides a headrest folding mechanism, including a headrest folding frame, a locking assembly and a fixed base;

[0006] The headrest folding frame is rotatably mounted on the fixed base, a headrest locking tongue adapted to the locking assembly is arranged on the headrest folding frame, the headrest locking tongue is relatively fixed to the headrest folding frame, a first return torsion spring is arranged on the headrest folding frame, one end of the first return torsion spring is connected to the headrest locking tongue, and the other end is connected to the fixed base;

[0007] The locking assembly comprises an unlocking shaft, a clearance lock tongue and a locking lock tongue, wherein the unlocking shaft is rotatably mounted on the fixed base, the unlocking shaft is connected with an unlocking cable, the locking lock tongue is fixedly sleeved on the unlocking shaft, and the clearance lock tongue is slidably sleeved on the unlocking shaft;

[0008] A second reset torsion spring is sleeved on the unlocking shaft, one end of the second reset torsion spring is connected to the fixed base, and the other end is connected to the locking tongue;

[0009] A third return torsion spring is sleeved on the unlocking shaft, one end of the third return torsion spring is connected to the fixed base, and the other end is connected to the gap locking tongue. When the headrest folding frame is locked, the gap locking tongue can tightly abut against the headrest locking tongue under the action of the third return torsion spring.

[0010] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect. Among them, a limit retaining ring is fixedly sleeved on the unlocking shaft, and the clearance locking tongue is located between the locking locking tongue and the limit retaining ring.

[0011] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect. Among them, an unlocking synchronizing rod is arranged on the locking locking tongue, and an unlocking synchronizing seat adapted to the unlocking synchronizing rod is provided on the clearance locking tongue.

[0012] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect. Among them, the headrest folding frame includes a rotating shaft and a headrest rod;

[0013] The rotating shaft is rotatably installed on the fixed base, and a plurality of the headrest rods are fixedly arranged on the rotating shaft;

[0014] The headrest locking tongue is fixedly arranged on the rotating shaft, and the first return torsion spring is sleeved on the rotating shaft.

[0015] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect. Among them, an adapter plate is fixedly arranged on the rotating shaft, and the headrest rod is fixedly arranged on the adapter plate.

[0016] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect. Among them, a strengthening support frame is provided on the fixed base, and both the rotating shaft and the unlocking shaft are passed through the strengthening support frame;

[0017] Self-lubricating bushings are provided at the perforation positions of the strengthening support frame for both the rotating shaft and the unlocking shaft.

[0018] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect. Among them, the total thickness of the clearance locking tongue and the locking locking tongue is equal to the thickness of the headrest locking tongue.

[0019] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect. Among them, a cable mounting seat for mounting the unlocking cable is provided on the fixed base.

[0020] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect. Among them, a cable connection seat connected to the unlocking cable is provided on the unlocking shaft.

[0021] In the second aspect, an embodiment of the present utility model provides an automobile seat, including the headrest folding mechanism.

[0022] Beneficial effects:

[0023] The utility model provides a headrest folding mechanism, which comprises a headrest folding frame, a locking component and a fixed base; the headrest folding frame is rotatably installed on the fixed base, a headrest locking tongue for adapting to the locking component is arranged on the headrest folding frame, the headrest locking tongue is relatively fixed to the headrest folding frame, a first return torsion spring is arranged on the headrest folding frame, one end of the first return torsion spring is connected with the headrest locking tongue, and the other end is connected with the fixed base; the locking component comprises an unlocking shaft, a clearance locking tongue and a locking locking tongue, the unlocking shaft is rotatably installed on the fixed base, the unlocking shaft is connected with an unlocking cable, the locking locking tongue is fixedly sleeved on the unlocking shaft, and the clearance locking tongue is slidably sleeved on the unlocking shaft; a second return torsion spring is sleeved on the unlocking shaft, one end of the second return torsion spring is connected with the fixed base, and the other end is connected with the locking locking tongue; a third return torsion spring is sleeved on the unlocking shaft, one end of the third return torsion spring is connected with the fixed base, and the other end is connected with the clearance locking tongue. When the headrest folding frame is locked, the clearance locking tongue can tightly abut against the headrest locking tongue under the action of the third return torsion spring.

[0024] Specifically, in the actual use process, the user pulls the unlocking cable to perform an unlocking action. When the unlocking cable is pulled, it can drive the unlocking shaft to rotate. The rotation of the unlocking shaft can drive the locking locking tongue to rotate, and the locking locking tongue drives the clearance locking tongue to rotate, so as to unlock the locking of the headrest locking tongue. Then the first return torsion spring drives the headrest locking tongue to rotate, and the headrest locking tongue drives the headrest folding frame to rotate, so as to complete the folding of the headrest. The user releases the unlocking cable. During this process, the locking locking tongue and the clearance locking tongue are reset under the action of the second return torsion spring and the third return torsion spring respectively; when the user opens the headrest, the user can manually lift the headrest upward. During the upward swinging process of the headrest, it will drive the headrest locking tongue to press and cross the clearance locking tongue and the locking locking tongue, so as to complete the locking. At the same time, the clearance locking tongue will tightly abut against the headrest locking tongue under the action of the third return torsion spring, so that the headrest locking tongue is firmly fixed and will not move randomly, so that the headrest will not shake after being locked.

[0025] An embodiment of the utility model provides an automobile seat, which comprises a headrest folding mechanism. The automobile seat has the above advantages compared with the prior art, and will not be described in detail here. Description of the drawings

[0026] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0027] Figure 1 Schematic diagram of the structure of the headrest folding mechanism provided by the embodiment of the present utility model from the first perspective;

[0028] Figure 2 Schematic diagram of the structure of the headrest folding mechanism provided by the embodiment of the present utility model from the second perspective;

[0029] Figure 3 Schematic diagram of the structure of the locking assembly in the headrest folding mechanism provided by the embodiment of the present utility model;

[0030] Figure 4 Explosion diagram of the headrest folding mechanism provided by the embodiment of the present utility model.

[0031] Icon:

[0032] 100 - Headrest folding frame; 110 - Headrest locking tongue; 120 - First return torsion spring; 130 - Rotating shaft; 140 - Headrest rod; 150 - Adapter plate;

[0033] 200 - Locking assembly; 210 - Unlocking shaft; 211 - Limit retaining ring; 220 - Clearance locking tongue; 221 - Unlocking synchronization seat; 230 - Locking locking tongue; 231 - Unlocking synchronization rod; 240 - Second return torsion spring; 250 - Third return torsion spring; 260 - Cable connection seat;

[0034] 300 - Fixed base; 310 - Reinforcing support frame; 320 - Cable mounting seat;

[0035] 400 - Unlocking cable. Detailed implementation manners

[0036] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0039] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] The present utility model will be further described in detail below through specific embodiments in conjunction with the drawings.

[0041] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown in

[0042] Among them, the total thickness of the clearance locking tongue 220 and the locking locking tongue 230 is equal to the thickness of the headrest locking tongue 110.

[0043] Specifically, during actual use, the user pulls the unlocking cable 400 to perform an unlocking action. When the unlocking cable 400 is pulled, it can drive the unlocking shaft 210 to rotate. The rotation of the unlocking shaft 210 can drive the locking locking tongue 230 to rotate, and the locking locking tongue 230 then drives the clearance locking tongue 220 to rotate, thereby unlocking the locking of the headrest locking tongue 110. Then, the first return torsion spring 120 drives the headrest locking tongue 110 to rotate, and the headrest locking tongue 110 drives the headrest folding frame 100 to rotate, thereby completing the folding of the headrest. When the user releases the unlocking cable 400, during this process, the locking locking tongue 230 and the clearance locking tongue 220 are reset under the action of the second return torsion spring 240 and the third return torsion spring 250 respectively; when the user opens the headrest, the user can manually lift the headrest upward. During the upward swinging process of the headrest, it will drive the headrest locking tongue 110 to press against and cross the clearance locking tongue 220 and the locking locking tongue 230, thereby completing the locking. At the same time, the clearance locking tongue 220 will tightly abut against the headrest locking tongue 110 under the action of the third return torsion spring 250, so that the headrest locking tongue 110 is firmly fixed and will not move randomly, so that the headrest will not shake after being locked.

[0044] Among them, a cable mounting seat 320 for mounting the unlocking cable 400 is provided on the fixed base 300, and a cable connecting seat 260 connected to the unlocking cable 400 is provided on the unlocking shaft 210.

[0045] It should be noted that components such as the locking assembly 200 and the headrest locking tongue 110 are all arranged between the two headrest rods 140. Therefore, the forces on the two headrest rods 140 are balanced. When impacted, the headrest will not deflect and will not cause sprains to the necks of passengers, ensuring safety.

[0046] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, in an alternative solution of this embodiment, a limit retaining ring 211 is fixedly sleeved on the unlocking shaft 210, and the clearance locking tongue 220 is located between the locking locking tongue 230 and the limit retaining ring 211.

[0047] Specifically, through the setting of the limit retaining ring 211, the clearance locking tongue 220 cannot move randomly, ensuring that the clearance locking tongue 220 will not fail, and enabling the clearance locking tongue 220 to abut against the headrest locking tongue 110 in the locked state.

[0048] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, in an alternative solution of this embodiment, an unlocking synchronization rod 231 is provided on the locking tongue 230, and an unlocking synchronization seat 221 adapted to the unlocking synchronization rod 231 is provided on the clearance tongue 220.

[0049] Specifically, through the setting of the unlocking synchronization rod 231, when the unlocking shaft 210 rotates, the unlocking shaft 210 can drive the locking tongue 230 to swing, and the unlocking synchronization rod 231 on the locking tongue 230 can drive the clearance tongue 220 to swing along with the locking tongue 230, so as to ensure that the clearance tongue 220 and the locking tongue 230 are unlocked synchronously, thereby releasing the locking of the headrest tongue 110.

[0050] Among them, the unlocking synchronization rod 231 adopts an unlocking pin.

[0051] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, in an alternative solution of this embodiment, the headrest folding frame 100 includes a rotating shaft 130 and a headrest rod 140; the rotating shaft 130 is rotatably installed on the fixed base 300, and a plurality of headrest rods 140 are fixedly arranged on the rotating shaft 130; the headrest tongue 110 is fixedly arranged on the rotating shaft 130, and the first return torsion spring 120 is sleeved on the rotating shaft 130.

[0052] Among them, a transfer plate 150 is fixedly arranged on the rotating shaft 130, and the headrest rod 140 is fixedly arranged on the transfer plate 150.

[0053] Among them, the fixed base 300 is provided with a strengthening support frame 310, and both the rotating shaft 130 and the unlocking shaft 210 are passed through the strengthening support frame 310; self-lubricating bushings are arranged at the perforation positions of the strengthening support frame 310 for the rotating shaft 130 and the unlocking shaft 210.

[0054] Specifically, the locking assembly 200 is arranged in the middle of the two headrest rods 140, so that the forces on both sides of the headrest are evenly distributed, which can avoid the problem of obvious large shaking clearance on the non-locking side when arranged unilaterally. And a clearance locking tongue 220 is arranged in the locking assembly 200. In the locked state, the clearance locking tongue 220 can tightly abut against the headrest locking tongue 110 under the action of the third return torsion spring 250, thereby reducing the shaking clearance of the headrest and reducing the manufacturing requirements for the overall structural accuracy. That is, the assembly accuracy of the headrest locking tongue 110 and the locking locking tongue 230 is reduced, and the assembly requirements for the first return torsion spring 120, the second return torsion spring 240 and the third return torsion spring 250 are reduced. It is not necessary to ensure the tight abutment of the headrest locking tongue 110 and the locking locking tongue 230 after the assembly of the first return torsion spring 120 and the second return torsion spring 240. Therefore, there is no requirement for the rotation angle of the unlocking shaft 210, as long as the third return torsion spring 250 drives the clearance locking tongue 220 to rotate on the unlocking shaft 210 and tightly abut against the headrest locking tongue 110. And a reinforcing support frame 310 is arranged on the fixed base 300. By arranging the reinforcing support frame 310, the rigidity of the locking assembly 200 can be effectively improved, and the stability of the locking assembly 200 can be ensured.

[0055] This embodiment provides an automobile seat, including a headrest folding mechanism.

[0056] Specifically, the automobile seat provided by the present utility model has the advantages of the above-mentioned headrest folding mechanism compared with the prior art, which will not be elaborated here.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A headrest folding mechanism, characterized in that: include: A headrest folding frame (100), a locking assembly (200) and a fixing base (300); The headrest folding frame (100) is rotatably mounted on the fixed base (300); a headrest locking tongue (110) adapted to the locking assembly (200) is disposed on the headrest folding frame (100); the headrest locking tongue (110) and the headrest folding frame (100) are relatively fixed; a first return torsion spring (120) is disposed on the headrest folding frame (100); one end of the first return torsion spring (120) is connected to the headrest locking tongue (110), and the other end is connected to the fixed base (300); The locking assembly (200) comprises an unlocking shaft (210), a clearance lock tongue (220) and a locking lock tongue (230); the unlocking shaft (210) is rotatably mounted on the fixed base (300); the unlocking shaft (210) is connected to an unlocking cable (400); the locking lock tongue (230) is fixedly sleeved on the unlocking shaft (210); and the clearance lock tongue (220) is slidably sleeved on the unlocking shaft (210); A second return torsion spring (240) is sleeved on the unlocking shaft (210), one end of the second return torsion spring (240) is connected to the fixed base (300), and the other end is connected to the locking bolt (230); A third return torsion spring (250) is sleeved on the unlocking shaft (210), one end of the third return torsion spring (250) is connected to the fixed base (300), and the other end is connected to the gap lock tongue (220); when the headrest folding frame (100) is locked, the gap lock tongue (220) can tightly abut against the headrest lock tongue (110) under the action of the third return torsion spring (250).

2. The headrest folding mechanism according to claim 1, characterized in that: A limit ring (211) is fixedly sleeved on the unlocking shaft (210), and the clearance lock tongue (220) is located between the locking lock tongue (230) and the limit ring (211).

3. The headrest folding mechanism according to claim 2, characterized in that: The locking bolt (230) is provided with an unlocking synchronization rod (231), and the clearance bolt (220) is provided with an unlocking synchronization seat (221) adapted to the unlocking synchronization rod (231).

4. The headrest folding mechanism according to claim 2, characterized in that: The headrest folding frame (100) comprises a rotating shaft (130) and a headrest rod (140); The rotating shaft (130) is rotatably mounted on the fixed base (300), and a plurality of headrest rods (140) are fixedly arranged on the rotating shaft (130); The headrest locking tongue (110) is fixedly arranged on the rotating shaft (130), and the first return torsion spring (120) is sleeved on the rotating shaft (130).

5. The headrest folding mechanism according to claim 4, characterized in that: An adapter plate (150) is fixedly arranged on the rotating shaft (130), and the headrest rod (140) is fixedly arranged on the adapter plate (150).

6. The headrest folding mechanism according to claim 4, characterized in that: The fixed base (300) is provided with a reinforcing support frame (310), and both the rotating shaft (130) and the unlocking shaft (210) are arranged on the reinforcing support frame (310); The reinforcing support frame (310) is provided with self-lubricating bushings at the through holes of both the rotating shaft (130) and the unlocking shaft (210).

7. The headrest folding mechanism according to claim 2, characterized in that: The total thickness of the clearance latch tongue (220) and the locking latch tongue (230) is equal to the thickness of the headrest latch tongue (110).

8. The headrest folding mechanism according to any one of claims 1 to 7, characterized in that: The fixed base (300) is provided with a cable mounting seat (320) for mounting the unlocking cable (400).

9. The headrest folding mechanism according to claim 8, characterized in that: The unlocking shaft (210) is provided with a cable connecting seat (260) connected to the unlocking cable (400).

10. A car seat, characterized in that: It comprises the headrest folding mechanism as claimed in any one of claims 1 to 9.

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