A locking mechanism for a folding headrest

Abstract

The application belongs to the field of automobile parts, and provides a locking mechanism of a folding headrest, comprising a shell and a supporting rod rotationally connected with the shell, characterized by a pushing assembly movably arranged on the shell, the pushing assembly having a pushing block capable of switching between a first position and a second position on the shell; a locking piece rotationally arranged on the shell and movably connected with the pushing block, the locking piece having a bayonet. Compared with the prior art, the application has the advantages that the shell and the supporting rod are provided with the locking piece and the connecting assembly, the bayonet is connected with or away from the supporting rod through the rotation of the locking piece, the locking or unlocking of the turnover is realized, the matching of the whole headrest is better, the structure is more stable, the machining tolerance accumulated by the part machining and assembly is reduced, the headrest is prevented from appearing gap shaking, and the comfort of passengers is improved.

Description

Technical Field

[0001] The invention belongs to the field of automobile parts, and in particular relates to a locking mechanism for a folding headrest. Background Art

[0002] The function of a headrest is generally to provide support for the driver and passengers' heads. Most existing rear headrests in cars have a forward and backward flip function. According to the passengers' habits and safety needs, the headrests can be flipped forward to provide passenger comfort. However, when headrests are manufactured in large quantities, due to the precision of the parts and the tolerances caused by manufacturing, it is easy for the headrests to rock back and forth even in the locked state, causing an uncomfortable experience for the passengers. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a locking mechanism for a folding headrest in view of the current status of the prior art.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: to propose a locking mechanism for a folding headrest, comprising: a shell and a support rod rotatably connected to the shell, characterized in that:

[0005] a pushing assembly movably disposed on the housing, the pushing assembly comprising a pushing block capable of switching between a first position and a second position on the housing;

[0006] a locking member rotatably disposed on the housing and movably connected to the pushing block, the locking member having a bayonet;

[0007] A connecting assembly connected to the support rod, wherein the connecting assembly has a locking pin shaft, and the locking pin shaft is movably engaged with the bayonet;

[0008] When the push block switches from the first position on the shell to the second position, the push block can drive the locking member to rotate, so that the locking pin shaft is disconnected from the bayonet, thereby changing the angle between the shell and the support rod.

[0009] In the above-mentioned locking mechanism of a folding headrest, the pushing assembly has a button and a spring. The button is located on one side of the shell and is connected to the pushing block. One end of the spring is connected to the pushing block, and the other end of the spring is connected to the shell.

[0010] In the above-mentioned locking mechanism of the folding headrest, the pushing block is provided with an oblique wedge portion, and the oblique wedge portion is movably connected to the locking member.

[0011] In the above-mentioned locking mechanism of the folding headrest, the shell has a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are symmetrically arranged, and the first connecting portion and the second connecting portion are connected by a first axle pin and a second axle pin.

[0012] In the above-mentioned locking mechanism of the folding headrest, the first connecting portion and the second connecting portion are respectively provided with a first limiting groove and a second limiting groove, and the locking pin is movably connected to the first limiting groove and the second limiting groove.

[0013] In the above-mentioned locking mechanism of a folding headrest, the locking member has a locking block, a pawl and a first torsion spring, the locking block is rotatably set on the axle pin, the pawl sleeve is set on the second axle pin, and the first torsion spring sleeve is set on the first axle pin, one end of the torsion spring is connected to the first connecting part, and the other end of the torsion spring is connected to the locking block, the locking block has a first end and a second end, the pawl has a third end and the bayonet, the first end is connected to the pushing block, and the second end is engaged with the third end.

[0014] In the above-mentioned locking mechanism of a folding headrest, the second end portion has a first abutting surface and a second abutting surface, the third end portion has a third abutting surface and a fourth abutting surface, the first abutting surface movably abuts against the fourth abutting surface, and the second abutting surface movably abuts against the third abutting surface.

[0015] In the above-mentioned locking mechanism of the folding headrest, a rotating rod is provided on the support rod, and the rotating rod is rotatably connected to the housing.

[0016] In the above-mentioned locking mechanism of a folding headrest, the connecting component has a connecting plate and a second torsion spring, the connecting plate and the second torsion spring are both mounted on the rotating rod, the connecting plate is connected to the locking pin shaft, and one end of the second torsion spring is connected to the second connecting part.

[0017] In the above-mentioned locking mechanism of the folding headrest, a detachable pressing cover is provided on the shell, and the pressing cover is located above the rotating rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: a locking piece and a connecting assembly are provided on the shell and the support rod, and the bayonet is connected to or separated from the support rod by the rotation of the locking piece, thereby realizing locking or unlocking flipping, making the entire headrest better matched and the structure more stable, thereby reducing the accumulated processing tolerances of parts processing and assembly, ensuring that the headrest will not have gaps and shake while improving passenger comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic structural diagram of the present invention in a first state;

[0020] Figure 2 is a schematic structural diagram of the present invention in the second state;

[0021] Figure 3 It is a partial structural schematic diagram of the present invention;

[0022] Figure 4 is a schematic diagram of the structure of the locking member;

[0023] Figure 5 It is a structural diagram of the connected components.

[0024] In the figure, 1, shell; 2, support rod; 3, pushing assembly; 4, locking member; 5, connecting assembly; 100, first connecting part; 101, second connecting part; 102, first axle pin; 103, second axle pin; 104, first limiting groove; 105, second limiting groove; 106, pressure cover; 200, rotating rod; 300, pushing block; 301, button; 302, spring; 303, beveled part; 400, bayonet; 401, locking block; 402, pawl; 403, first torsion spring; 404, first abutting surface; 405, second abutting surface; 406, third abutting surface; 407, fourth abutting surface; 408, first end portion; 409, second end portion; 410, third end portion; 500, locking pin shaft; 501, connecting piece; 502, second torsion spring. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figures 1 to 3 As shown, the locking mechanism of the folding headrest includes: a shell 1 and a support rod 2 rotatably connected to the shell 1, a pushing assembly 3, which is movably arranged on the shell 1, the pushing assembly 3 has a pushing block 300, and the pushing block 300 can switch between a first position and a second position on the shell 1; a locking member 4, which is rotatably arranged on the shell 1 and movably connected to the pushing block 300, and the locking member 4 has a bayonet 400; a connecting assembly 5, which is connected to the support rod 2, the connecting assembly 5 has a locking pin 500, and the locking pin 500 is movably engaged with the bayonet 400; when the pushing block 300 switches from the first position on the shell 1 to the second position, the pushing block 300 can drive the locking member 4 to rotate, so that the locking pin 500 is disengaged from the connection with the bayonet 400, thereby changing the angle between the shell 1 and the support rod 2.

[0027] The shell 1 is a plastic shell 1. When the headrest is in the locked state, that is, the first state, the locking pin shaft 500 is engaged in the bayonet 400. The pushing component 3 is manually pressed, and the pushing block 300 on the pushing component 3 moves from the first position on the right to the second position on the left. The pushing block 300 contacts the locking member 4 and drives the locking member 4 to rotate, so that the position of the bayonet 400 changes, and the locking pin shaft 500 is disconnected from the buckle, so that the shell 1 flips relative to the support rod 2 to achieve the second state; when the headrest needs to be switched from the second state to the first state, the shell 1 is manually pushed to make the shell The body 1 is reset and rotated relative to the support rod 2. During the flipping process of the shell 1, the locking member 4 provided on the shell 1 also rotates accordingly. As the shell 1 flips, the bayonet 400 is initially away from the locking pin shaft 500 until it is close to the locking pin shaft 500. Finally, the bayonet 400 and the locking pin shaft 500 are abutted to achieve engagement and reset the lock member to lock, so that the shell 1 and the support rod 2 are fixed. Through the cooperation of the bayonet 400 and the locking member 4, the gap between the shell 1 and the support rod 2 is eliminated, so that the shell 1 will not shake with the front and rear gap relative to the support rod 2, thereby improving the comfort of the passengers.

[0028] like Figures 1 to 3 As shown, the pushing assembly 3 has a button 301 and a spring 302 . The button 301 is located on one side of the housing 1 and is connected to the pushing block 300 . One end of the spring 302 is connected to the pushing block 300 , and the other end of the spring 302 is connected to the housing 1 .

[0029] The button 301 is located on the right side of the shell 1. When the button 301 is pressed manually, the button 301 moves toward the inside of the shell 1, so that the button 301 pushes the pushing block 300 to switch from the first position to the second position, and then the pushing block 300 drives the locking member 4 to move. After the button 301 is manually released, the spring 302 is expanded by the force of the spring 302, thereby driving the button 301 and the pushing block 300 connected to the button 301 to reset.

[0030] like Figures 1 to 3 As shown, the pushing block 300 is provided with an oblique portion 303 , which is movably connected to the locking member 4 .

[0031] The front end of the push block 300 is provided with a beveled portion 303, and the lower end surface of the beveled portion 303 has a beveled surface. When the push block 300 switches from the first position to the second position, the beveled portion 303 can drive the push locking member 4 to rotate, so that the shell 1 and the support rod 2 are unlocked.

[0032] like Figures 1 to 3 As shown, the housing 1 has a first connecting portion 100 and a second connecting portion 101 . The first connecting portion 100 and the second connecting portion 101 are symmetrically arranged, and the first connecting portion 100 and the second connecting portion 101 are connected by a first shaft pin 102 and a second shaft pin 103 .

[0033] The first connecting part 100 and the second connecting part 101 have the same structure. The first connecting part 100 and the second connecting part 101 are connected by a first axial pin 102 and a second axial pin 103. The locking member 4 is located between the first connecting part 100 and the second connecting part 101 and is connected to the first axial pin 102 and the second axial pin 103.

[0034] like Figures 1 to 3 As shown, the first connection portion 100 and the second connection portion 101 are respectively provided with a first limiting groove 104 and a second limiting groove 105 , and the locking pin shaft 500 is movably connected to the first limiting groove 104 and the second limiting groove 105 .

[0035] The first limiting groove 104 and the second limiting groove 105 are at the same horizontal position, the shell 1 and the support rod 2 are in a locked state, the locking pin shaft 500 is engaged with the bayonet 400, and the two ends of the locking pin shaft 500 are respectively against the first limiting groove 104 and the second limiting groove 105. The first limiting groove 104 and the second limiting groove 105 are used to limit the locking pin shaft 500 to ensure that the headrest will not have a gap and shake.

[0036] like Figures 1 to 4 As shown, the locking member 4 has a locking block 401, a pawl 402 and a first torsion spring 403. The locking block 401 is rotatably set on the shaft pin, the pawl 402 is sleeved on the second shaft pin 103, and the first torsion spring 403 is sleeved on the first shaft pin 102. One end of the torsion spring is connected to the first connecting part 100, and the other end of the torsion spring is connected to the locking block 401. The locking block 401 has a first end 408 and a second end 409. The pawl 402 has a third end 410 and a bayonet 400. The first end 408 is connected to the push block 300, and the second end 409 is engaged with the third end 410.

[0037] The pushing block 300 switches from the first position to the second position so that the beveled portion 303 is connected to the first end portion 408. The beveled portion 303 presses the first end portion 408 downward, causing the second end portion 409 to tilt upward. The positions of the second end portion 409 and the third end portion 410 change. The second end portion 409 presses the third portion downward, causing the bayonet 400 to tilt. The opening position of the bayonet 400 changes, and the locking pin shaft 500 disengages from the bayonet 400, thereby achieving flipping and folding of the headrest relative to the support rod 2.

[0038] like Figure 3 and 4 As shown, the second end 409 has a first abutting surface 404 and a second abutting surface 405, and the third end 410 has a third abutting surface 406 and a fourth abutting surface 407. The first abutting surface 404 and the fourth abutting surface 407 are movably abutted against each other, and the second abutting surface 405 and the third abutting surface 406 are movably abutted against each other.

[0039] When the shell 1 and the support rod 2 are in the first state, the first abutting surface 404 abuts against the fourth abutting surface 407. At this time, the opening of the bayonet 400 is in a horizontal position. When the pushing block 300 moves from the first position to the second position, the bevel portion 303 abuts against the first end portion 408, and the second end portion 409 is tilted, so that the first abutting surface 404 is disengaged from the fourth abutting surface 407, and the second abutting surface 405 is located above the third abutting surface 406. Because of the torsion of the first torsion spring 403, the second abutting portion is driven to move, and the second abutting surface 405 is pressed down by the torsion of the first torsion spring 403 against the third abutting surface 406, so that the opening of the bayonet 400 changes from a horizontal position to an inclined position.

[0040] like Figure 3 As shown, a rotating rod 200 is provided on the support rod 2 , and the rotating rod 200 is rotatably connected to the housing 1 .

[0041] There are two support rods 2 , and the two support rods 2 are rotatably connected to the housing 1 through a rotating rod 200 .

[0042] like Figure 5 As shown, the connecting component 5 has a connecting piece 501 and a second torsion spring 502. The connecting piece 501 and the second torsion spring 502 are both sleeved on the rotating rod 200. The connecting piece 501 is connected to the locking pin shaft 500, and one end of the second torsion spring 502 is connected to the second connecting part 101.

[0043] like Figures 3 to 5 As shown, the connecting piece 501 and the torsion spring are both mounted on the rotating rod 200. When the opening of the bayonet 400 changes from a horizontal position to an inclined position, the locking pin shaft 500 is subjected to the torsion force of the second torsion spring 502 and thus disengages from the bayonet 400, thereby flipping the housing 1 relative to the support rod 2.

[0044] like Figure 1 As shown, a detachable pressure cover 106 is provided on the housing 1 , and the pressure cover 106 is located above the rotating rod 200 .

[0045] The pressure cover 106 is connected to the housing 1 through bolts. The pressure cover 106 is provided to provide a position limiting protection for the rotating rod 200 of the support rod 2.

[0046] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0048] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0049] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A locking mechanism for a folding headrest, comprising: The housing and the support rod rotatably connected to the housing are characterized in that: a pushing assembly movably disposed on the housing, the pushing assembly comprising a pushing block capable of switching between a first position and a second position on the housing; a locking member rotatably disposed on the housing and movably connected to the pushing block, the locking member having a bayonet; A connecting assembly connected to the support rod, wherein the connecting assembly has a locking pin shaft, and the locking pin shaft is movably engaged with the bayonet; When the push block switches from the first position on the housing to the second position, the push block can drive the locking member to rotate, so that the locking pin shaft is disconnected from the bayonet, thereby changing the angle between the housing and the support rod; The housing has a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are symmetrically arranged, and the first connecting portion and the second connecting portion are connected by a first shaft pin and a second shaft pin; A first limiting groove and a second limiting groove are respectively formed on the first connecting portion and the second connecting portion, and the locking pin shaft is movably connected to the first limiting groove and the second limiting groove; The locking member comprises a locking block, a pawl and a first torsion spring, the locking block is rotatably arranged on the shaft pin, the pawl sleeve is arranged on the second shaft pin, and the first torsion spring sleeve is arranged on the first shaft pin, one end of the torsion spring is connected to the first connecting portion, and the other end of the torsion spring is connected to the locking block, the locking block has a first end and a second end, the pawl has a third end and the bayonet, the first end is connected to the pushing block, and the second end is engaged with the third end; The support rod is provided with a rotating rod, and the rotating rod is rotatably connected to the housing; The connecting assembly comprises a connecting piece and a second torsion spring. Both the connecting piece and the second torsion spring are sleeved on the rotating rod. The connecting piece is connected to the locking pin shaft. One end of the second torsion spring is connected to the second connecting portion.

2. The locking mechanism of a folding headrest according to claim 1, characterized in that: The pushing component comprises a button and a spring. The button is located on one side of the shell and is connected to the pushing block. One end of the spring is connected to the pushing block, and the other end of the spring is connected to the shell.

3. The locking mechanism of a folding headrest according to claim 2, characterized in that: The pushing block is provided with an oblique portion, and the oblique portion is movably connected to the locking member.

4. The locking mechanism of a folding headrest according to claim 1, characterized in that: The second end portion has a first abutting surface and a second abutting surface, the third end portion has a third abutting surface and a fourth abutting surface, the first abutting surface movably abuts against the fourth abutting surface, and the second abutting surface movably abuts against the third abutting surface.

5. The locking mechanism of a folding headrest according to claim 1, characterized in that: The housing is provided with a detachable pressure cover, and the pressure cover is located above the rotating rod.

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