Bidirectional headrest mechanism based on lateral locking

Abstract

The utility model discloses a two-way headrest mechanism based on lateral locking, which belongs to the technical field of vehicle seat accessories, and comprises a headrest body, a transverse guide groove and a vertical hole site are arranged in the headrest body; the insertion rod vertically penetrates through the vertical hole site, and a plurality of groups of insertion rod notches are formed in the insertion rod; the locking steel wire is arranged in the transverse guide groove, the locking steel wire comprises a straight section, and the straight section is embedded into the insertion rod notch to achieve locking; one end of the tension spring is connected with the locking steel wire, the other end of the tension spring is connected with the headrest body, and the tension spring is used for applying transverse tension to the locking steel wire; and the button assembly is installed on one side of the headrest body, and the button assembly makes contact with the locking steel wire and is used for enabling the locking steel wire to be separated from the insertion rod notch to achieve unlocking.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of vehicle seat accessories, and particularly relates to a two-way headrest mechanism, and especially to a two-way headrest adjusting mechanism based on single steel wire lateral locking, which is suitable for occasions requiring two-way adjustment and reliable locking, such as automobile seats and aviation seats. BACKGROUND

[0002] At present, most two-way headrest mechanisms on the market usually adopt two long bushing structures, and if the insertion rod has a bending (such as an L-shaped or U-shaped insertion rod), the insertion rod cannot be assembled from top to bottom, so the insertion rod must be split into two separate rod pieces. This not only reduces the structural rigidity, causing the headrest to easily shake, but also increases the complexity of manufacturing and assembly.

[0003] In recent years, some vehicle models have begun to use two-way headrest mechanisms that are unlocked laterally, such as the patent CN115768657A, which discloses a scheme of embedding two locking iron sheets or installing two independent locking steel wires in a plastic push plate. However, this structure increases the material and assembly costs due to the need for precisely machined locking iron sheets or multiple locking steel wires.

[0004] Therefore, there is an urgent need for a two-way headrest locking mechanism with low cost, easy assembly, and high reliability, which can overcome the defects of the prior art and meet the needs of frequent adjustment and long-term durability. SUMMARY

[0005] The utility model provides a two-way headrest mechanism based on lateral locking to solve the technical defects of complex structure, high cost, and poor locking reliability in existing two-way adjustable headrests of automobiles.

[0006] The utility model provides a two-way headrest mechanism based on lateral locking, comprising: a headrest body, the headrest body is internally provided with a horizontal guide groove and a vertical hole position; an insertion rod, the insertion rod vertically penetrates the vertical hole position, and a plurality of groups of insertion rod notches are arranged on the insertion rod; a locking steel wire, the locking steel wire is arranged in the horizontal guide groove, and the locking steel wire comprises a straight section, which is embedded in the insertion rod notch to achieve locking; a tension spring, one end of the tension spring is connected to the locking steel wire, and the other end of the tension spring is connected to the headrest body, for applying a horizontal tension to the locking steel wire; a button assembly, the button assembly is installed on one side of the headrest body, and the button assembly is in contact with the locking steel wire to make the locking steel wire disengage from the insertion rod notch to achieve unlocking.

[0007] Optionally, the insertion rod comprises a horizontal rod and vertical rods at both ends, forming an inverted U-shaped structure, and the notches are arranged on the side surface of the vertical rods.

[0008] Optionally, a plurality of groups of short bushings are symmetrically mounted in the headrest body, the vertical rod passes through the short bushings and is in sliding fit with the short bushings, so that the vertical rod is kept vertical and centered when sliding up and down.

[0009] Optionally, the vertical rod is in clearance fit with the vertical hole position, so that the vertical rod can pass through the vertical hole position to move up and down.

[0010] Optionally, the length of the straight section of the locking steel wire matches the spacing of the plug rod notch, and the end of the straight section is provided with a chamfer to reduce the friction resistance with the plug rod notch.

[0011] Optionally, the transverse guide groove is in clearance fit with the locking steel wire, and the end of the transverse guide groove is provided with a flange for limiting the transverse displacement of the locking steel wire.

[0012] Optionally, the bottom of the transverse guide groove is provided with a rubber buffer pad for absorbing the impact when the locking steel wire is reset.

[0013] Optionally, the button assembly comprises a button core, a button spring and a button frame, the button frame is mounted on one side of the headrest body, the button core is slidably connected in the button frame, one end of the button spring is connected to the button core, and the other end of the button spring is connected to the button frame, and the button core is in contact with the locking steel wire.

[0014] Optionally, the contact surface of the button core and the locking steel wire is arc-shaped, and the contact surface is coated with a wear-resistant coating to prolong the service life.

[0015] Optionally, the headrest body comprises a front shell and a rear shell, and the front shell and the rear shell are connected by snap fit or screw fit.

[0016] The two-way headrest mechanism based on lateral locking provided by the utility model realizes the locking function by the cooperation of the locking steel wire and the plug rod notch, and the number of parts is greatly reduced compared with the traditional two-way headrest mechanism, and the plug rod is integrally formed, the up and down movement is realized, the rigidity of the mechanism is ensured, and the assembly efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0018] Figure 1 It is a front view of the two-way headrest mechanism based on lateral locking provided by an embodiment of the utility model.

[0019] Figure 2 is an embodiment of the utility model provides a two -way headrest mechanism's plug -in rod adjusting use state diagram based on lateral locking Figure 1 ;

[0020] Figure 3 is an embodiment of the utility model provides a two -way headrest mechanism plug -in rod adjusting use state diagram based on lateral locking Figure 2 ;

[0021] Figure 4 is the utility model's two -way headrest mechanism parts explosion view based on lateral locking;

[0022] Figure 5 is the structure diagram of the rear shell of the utility model;

[0023] Figure 6 is the structure diagram of the plug -in rod of the utility model;

[0024] Figure 7 is the assembly of the plug -in rod and the rear shell of the utility model Figure 1 ;

[0025] Figure 8 is the assembly of the plug -in rod and the rear shell of the utility model Figure 2 ;

[0026] Figure 9 is the assembly diagram of the tension spring, locking wire and rear shell of the utility model;

[0027] Figure 10 is Figure 9 the local enlarged diagram of A in;

[0028] Figure 11 is the assembly diagram of the locking wire and the plug -in rod of the utility model;

[0029] Figure 12 is an embodiment of the utility model provides a two -way headrest mechanism's locking state diagram based on lateral locking;

[0030] Figure 13 is an embodiment of the utility model provides a two -way headrest mechanism's unlocking state diagram based on lateral locking.

[0031] Reference signs:

[0032] 1. Headrest body; 11. Front shell; 12. Rear shell; 13. Horizontal guide groove; 14. Vertical hole; 2. Insert rod; 21. Horizontal rod; 22. Vertical rod; 24. Insert rod slot; 3. Locking wire; 31. Straight section; 4. Tension spring; 5. Button assembly; 51. Button core; 52. Button spring; 53. Button frame; 6. Short bushing. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] As mentioned earlier, existing two-way adjustable headrests for automobiles generally suffer from technical defects such as complex structure, high cost, difficult assembly, poor locking reliability, unpleasant operating feel, and insufficient durability, and innovative solutions are urgently needed.

[0035] In response to this, the present invention provides a two-way headrest mechanism based on lateral locking. A locking steel wire 3 is used to replace the plastic part with embedded iron plate in the prior art. Through cooperation with the insertion rod slot 24, the locking function is cleverly achieved by using a single locking steel wire 3. The mechanism can move up and down while ensuring that the insertion rod 2 is integrally formed, thus improving assembly efficiency while ensuring the rigidity of the mechanism.

[0036] The following is combined Figures 1-12 This utility model is described in detail.

[0037] First embodiment:

[0038] like Figures 1-4 As shown, this utility model provides a two-way headrest mechanism, particularly a two-way headrest mechanism based on lateral locking. In this embodiment, the two-way headrest mechanism based on lateral locking may include: a headrest body 1, a plug rod 2, a locking wire 3, a tension spring 4, and a button assembly 5. The headrest body 1 may include a front shell 11 and a rear shell 12, which are connected by a snap-fit ​​or screw. The snap-fit ​​provides quick pre-positioning, and the screw enhances structural strength.

[0039] like Figures 5-8As shown, the rear shell 12 is internally provided with a transverse guide slot 13 and a vertical hole position 14 and symmetrically mounted with several groups of short bushings 6. The transverse guide slot 13 is used to guide the linear motion of the locking steel wire 3, ensuring the stability of the locking, and the vertical hole position 14 is the installation reference of the insertion rod 2, and the short bushing 6 is used to limit the insertion rod 2 and reduce the sliding friction coefficient of the insertion rod 2. The insertion rod 2 can include a horizontal rod 21 and vertical rods 22 at both ends, forming an inverted U-shaped structure, the bottom of the vertical rod 22 is provided with a bend, and the side of the vertical rod 22 is provided with a plurality of groups of insertion rod 2 notches 24. The insertion rod 2 is integrally designed, and the horizontal rod 21 connects the double vertical rods 22 to enhance the overall rigidity. The insertion rod 2 vertically penetrates the vertical hole position 14, the vertical rod 22 penetrates the short bushing 6 and is in sliding cooperation with the short bushing 6, so that the vertical rod 22 remains vertical and centered when it slides up and down. The vertical rod 22 is in clearance fit with the vertical hole position 14, which facilitates the bend to pass during assembly, so that the vertical rod 22 can pass through the vertical hole position 14 to move up and down, ensuring that the insertion rod 2 does not deviate when moving vertically, and the insertion rod 2 can be installed by blind insertion through the vertical hole position 14 during assembly.

[0040] As shown in the drawings, Figures 9-11 The locking steel wire 3 is arranged in the transverse guide slot 13, one end of the tension spring 4 is connected with the locking steel wire 3, and the other end of the tension spring 4 is connected with the headrest body 1, so as to apply a transverse tension to the locking steel wire 3. The locking steel wire 3 can include a straight section 31, the straight section 31 is embedded in the insertion rod notch 24, the length of the straight section 31 of the locking steel wire 3 is matched with the spacing of the insertion rod notch 24, so that the insertion rod notch 24 and the straight section 31 of the locking steel wire 3 form a surface contact locking. And the end of the straight section 31 is provided with a chamfer to reduce the friction resistance with the insertion rod notch 24. The transverse guide slot 13 is in clearance fit with the locking steel wire 3, the end of the transverse guide slot 13 is provided with a flange for limiting the transverse displacement of the locking steel wire 3, preventing the displacement of the locking steel wire 3 from being out of range. The bottom of the transverse guide slot 13 is provided with a rubber buffer pad for absorbing the impact when the locking steel wire 3 is reset, and the noise reduction effect is significant.

[0041] Second embodiment:

[0042] As shown in the drawings, Figure 12 And Figure 13 The utility model provides a two -way headrest mechanism, and its button assembly 5 can include button core 51, button spring 52 and button frame 53, button frame 53 is installed to one side of headrest body 1, button core 51 can be slidably connected in button frame 53, one end of button spring 52 is connected with button core 51, the other end of button spring 52 is connected with button frame 53, button core 51 is in contact with locking steel wire 3, to make locking steel wire 3 separate insertion rod notch 24 and realize unlocking. The contact surface of button core 51 and locking steel wire 3 is arc-shaped, and the contact surface is coated with a wear-resistant coating to prolong the service life. When the arc-shaped contact surface of the button core 51 pushes the locking steel wire 3, the straight section 31 is separated from the insertion rod notch 24, and at this time the insertion rod 2 can be freely adjusted in height; after the button is released, the tension spring 4 pulls the locking steel wire 3 to reset and relock.

[0043] In summary, the two-way headrest mechanism based on lateral locking has the following advantages:

[0044] I. Simplify the structure, convenient assembly:

[0045] 1. The plug rod 2 adopts an integrated double vertical rod 22 structure with bending, and cooperates with the short bushing 6 guide, without the need for additional reinforcing parts to ensure vertical centring, compared with the traditional plug rod 2, the number of parts is reduced;

[0046] 2. The locking wire 3 is directly inserted into the slot 24 of the plug rod 2 through the transverse guide groove 13 to realize locking, which saves complex structure and shortens the assembly time;

[0047] 3. The gap between the bending part of the plug rod 2 and the vertical hole position 14 is designed to allow direct insertion from the top for installation, simplifying the assembly process.

[0048] II. Locking is stable and accurate:

[0049] 1. The straight section 31 of the locking wire 3 cooperates with the slot 24 of the plug rod, and the constant tension of the tension spring 4 ensures that the locking error remains low after long-term use;

[0050] 2. The chamfer design at the end of the straight section 31 reduces friction resistance, making the unlocking force stable;

[0051] 3. The flange of the transverse guide groove 13 and the rubber buffer pad double limit to avoid the locking wire 3 from tilting or impacting abnormal noise.

[0052] III. Wear-resistant, noise-reducing, and life-enhancing:

[0053] 1. The contact surface between the button core 51 and the locking wire 3 adopts an arc shape + wear-resistant coating, which reduces the wear rate and prolongs the service life;

[0054] 2. The rubber buffer pad is embedded in the transverse guide groove 13, which effectively absorbs road vibration and reduces noise.

[0055] IV. Lightweight and cost optimization:

[0056] 1. The locking structure is only composed of the locking wire 3, the tension spring 4 and the button assembly 5, which is lower in material cost than the traditional scheme.

[0057] 2. The gap between the short bushing 6 and the plug rod 2 avoids the need for precision machining, further reducing costs.

[0058] In summary, the unique structure of the lateral locking significantly simplifies the headrest adjusting mechanism while ensuring strength and reliability, with the advantages of low cost, high precision and long service life, especially suitable for high-end vehicles that need frequent adjustment.

[0059] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been explained in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A two-way headrest mechanism based on lateral locking, characterized in that, The utility model relates to a headrest locking mechanism, including: Headrest body (1), the headrest body (1) inside is equipped with transverse guide groove (13) and vertical hole (14); Inserting rod (2), the inserting rod (2) vertically passes through the vertical hole (14), and the inserting rod (2) is equipped with several groups of inserting rod slot (24); Locking steel wire (3), the locking steel wire (3) is arranged in the transverse guide groove (13), and the locking steel wire (3) includes straight section (31), and the straight section (31) is embedded in the inserting rod slot (24) to realize locking; Tension spring (4), one end of the tension spring (4) is connected with the locking steel wire (3), and the other end of the tension spring (4) is connected with the headrest body (1), for applying transverse tension to the locking steel wire (3); Button assembly (5), the button assembly (5) is installed on one side of the headrest body (1), and the button assembly (5) is in contact with the locking steel wire (3), to make the locking steel wire (3) be separated from the inserting rod slot (24) and realize unlocking.

2. The two-way headrest mechanism based on lateral locking according to claim 1, characterized in that The inserting rod (2) includes horizontal rod (21) and vertical rod (22) at both ends, forms inverted U-shaped structure, and the slot (24) is arranged on the side surface of the vertical rod (22).

3. The two-way headrest mechanism based on lateral locking according to claim 2, characterized in that A plurality of groups of short bushings (6) are symmetrically installed in the headrest body (1), the vertical rod (22) passes through the short bushing (6) and is slidably connected with the short bushing (6), so that the vertical rod (22) is kept vertical and centered when sliding up and down.

4. The two-way headrest mechanism based on side locking according to claim 3, characterized in that The vertical rod (22) is in clearance fit with the vertical hole (14), so that the vertical rod (22) can pass through the vertical hole (14) to move up and down.

5. The side-locked based two-way headrest mechanism of claim 1, wherein, The length of the straight section (31) of the locking steel wire (3) matches the spacing of the inserting rod slot (24), and the end of the straight section (31) is provided with a chamfer to reduce the frictional resistance of the inserting rod slot (24).

6. The two-way headrest mechanism based on side locking according to claim 5, characterized in that The transverse guide groove (13) is in clearance fit with the locking steel wire (3), and the end of the transverse guide groove (13) is provided with a flange for limiting the transverse displacement of the locking steel wire (3).

7. The two-way headrest mechanism based on side locking according to claim 6, characterized in that The bottom of the transverse guide groove (13) is provided with a rubber buffer pad for absorbing the impact when the locking steel wire (3) resets.

8. The side-locked based two-way headrest mechanism of claim 1, wherein, The button assembly (5) includes a button core (51), a button spring (52) and a button frame (53), the button frame (53) is installed on one side of the headrest body (1), the button core (51) is slidably connected in the button frame (53), one end of the button spring (52) is connected with the button core (51), the other end of the button spring (52) is connected with the button frame (53), and the button core (51) is in contact with the locking steel wire (3).

9. The two-way headrest mechanism based on side locking according to claim 8, characterized in that The contact surface between the button core (51) and the locking steel wire (3) is arc-shaped, and the contact surface is coated with a wear-resistant coating to prolong the service life.

10. The side-locked based two-way headrest mechanism of claim 1, wherein, The headrest body (1) includes a front shell (11) and a rear shell (12), and the front shell (11) and the rear shell (12) are connected by snap or screw fit.

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