Electric headrest folding mechanism

Abstract

The utility model discloses an electric headrest folding mechanism which comprises an installation support and a headrest support, and a linear sliding groove and a curve sliding groove are formed in the left side wall and the right side wall of the installation support respectively. Each curve sliding groove comprises an arc-shaped guiding section and a straight buffering section, the arc-shaped buffering sections are close to the linear sliding grooves, cross rods are arranged in the curve sliding grooves in the left side wall and the right side wall of the mounting support in a penetrating mode, sliding pieces are arranged in the linear sliding grooves in the left side wall and the right side wall of the mounting support in a penetrating mode, and the sliding pieces are driven by a motor to move. A connecting rod is hinged between the cross rod and the sliding piece; the headrest support is connected with the transverse rod, and the transverse rod moves in the curve sliding groove and can drive the headrest support to be folded. The headrest folding mechanism has the advantages that the structure is simple, manufacturing is convenient, concentric rotation is adopted in the headrest folding mechanism, and the modeling adaptability is high; the curve sliding groove can enable the headrest to be locked stably, the impact resistance is high, the structure is compact, the size is small, platformization is easy to achieve, and the mechanism universality is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile seat, concretely relates to electric headrest folding mechanism. BACKGROUND

[0002] At present, the existing automobile seat product's turnover headrest is manual operation universally, and the manual turnover headrest has big impact when turning over, and is easy to produce abnormal sound, and the adjustment mode of the manual folding headrest is relatively complicated, needs manual operation and is inconvenient, influences the driving feeling, and the manual folding headrest can not provide enough support and protection when collision occurs, increases the risk of neck injury. Therefore, the manual folding headrest is changed into electric folding headrest, but still faces some problems, for example, weak impact resistance, low modeling adaptability, complex structure, high production and maintenance cost, difficult maintenance and the like. SUMMARY

[0003] To solve the above technical problems, the utility model provides a kind of electric headrest folding mechanism with simple structure and easy manufacturing

[0004] Its technical scheme is as follows: a kind of electric headrest folding mechanism, its gist is, including installation support and headrest support, wherein two two opposite straight line sliding grooves and two two opposite curve sliding grooves are arranged on the left and right side walls of the installation support;

[0005] The curve sliding groove includes an arc-shaped guide section and a straight buffer section, wherein the straight buffer section is close to the straight line sliding groove, a horizontal rod is arranged in the curve sliding groove of the left and right side walls of the installation support, a sliding member is arranged in the straight line sliding groove of the left and right side walls of the installation support, the sliding member is driven to move by the motor, the moving direction of the sliding member is perpendicular to the axial direction of the horizontal rod, and a connecting rod is hinged between the horizontal rod and the sliding member;

[0006] The headrest support rod is connected with the horizontal rod, and the movement of the horizontal rod in the curve sliding groove can drive the folding of the headrest support. With the above structure, the structure is simple, the manufacturing is convenient, the structure is compact and small in size, the platformization is easy to realize, the mechanism has strong universality, the sliding member can slide upward in the two two opposite straight line sliding grooves, the horizontal column above is driven to slide and fold in the curve sliding groove through the external connecting rod, when the horizontal rod slides to the top end of the curve sliding groove, the headrest support rod can be continuously pushed forward to rotate, the curve sliding groove can make the headrest locking stable, and the headrest can meet the impact test of the regulations related to the headrest in the use position, and the headrest folding mechanism is arranged on the two sides of the installation support, so that the headrest folding is more stable.

[0007] Preferably, the two ends of the horizontal rod pass through the left and right side walls of the mounting bracket through curved sliding grooves, the sliding member is a sliding block, the two ends of the sliding block pass through the left and right side walls of the mounting bracket through straight sliding grooves, and the connecting rods are hinged between the passing-through ends on the same side of the horizontal rod and the sliding block. With the above structure, the linkage of the sliding member and the horizontal rod can be realized through the connecting rods, and the horizontal rod above can be driven to slide in the curved sliding groove when the sliding member moves upward.

[0008] Preferably, the motor is fixed on the mounting bracket away from the headrest support, and a motor lead screw is threadedly connected to the middle of the sliding block, the motor lead screw is arranged perpendicularly to the horizontal rod, and the motor lead screw is connected with the output shaft of the motor. With the above structure, the motor can be fixed on the mounting bracket, avoiding movement or falling off during use, the motor lead screw is connected with the output shaft of the motor, and power can be provided for the sliding block to move on the motor lead screw.

[0009] Preferably, fixed rods parallel to the horizontal rod are fixed on the left and right side walls of the mounting bracket, the two ends of the fixed rods pass through the left and right side walls of the mounting bracket, connecting supports are hinged between the passing-through ends on the same side of the fixed rods and the horizontal rod, and the connecting supports correspondingly fix the headrest supports. With the above structure, the horizontal rod can be rotated concentrically around the fixed rod, thereby driving the headrest supports fixed on the connecting supports to be folded.

[0010] Preferably, the length of the screw thread of the motor lead screw is greater than the length of the straight sliding groove, and a limiting piece is sleeved on the outer end of the motor lead screw and fixed on the mounting bracket. With the above structure, the limiting piece is arranged to enable the sliding block to slide only on the motor lead screw, avoiding the sliding block from sliding beyond the height of the motor lead screw, so that the linkage with the horizontal rod through the connecting rods cannot be continued.

[0011] Preferably, the connecting support is in a “U” shape, one side of the bottom of the connecting support extends outward, a through hole is formed in the extension, and the connecting support is sleeved on the fixed rod through the through hole.

[0012] An arc-shaped strip hole is formed in the bottom of the connecting support, and the horizontal rod passes through the connecting rod and extends into the arc-shaped strip hole.

[0013] Mounting holes are formed in the opposite side walls of the connecting support, a limiting sleeve is arranged between the two mounting holes, and the headrest support is fixed on the connecting support through the limiting sleeve. With the above structure, the connecting support and the fixed rod are hinged, the connecting support can rotate around the fixed rod, the horizontal rod can slide in the curved sliding groove and the arc-shaped mounting hole, and there is a certain buffering effect. The headrest support is arranged on the connecting support through the limiting sleeve, and the headrest support can be driven to rotate together when the connecting support rotates.

[0014] As preferred: two first limiting tables are arranged on one end of the limiting sleeve, and a second limiting table is arranged on the other end, the first limiting table and the second limiting table are arranged in the same direction, and the second limiting table is in the same horizontal line with one of the first limiting tables. With the above structure, the limiting sleeve can be fixedly installed on the connecting support through the limiting tables, and falling off during use can be effectively avoided.

[0015] As preferred: a ring groove is arranged on the limiting sleeve close to the first limiting table, the ring groove is closed on one side, the headrest support is provided with a notch corresponding to the ring groove, and a fixing ring is arranged in the ring groove and can extend into the notch of the headrest support. With the above structure, the headrest support can be fixed in the limiting sleeve through the fixing ring, the ring groove and the notch, and the possibility of displacement of the headrest support can be avoided.

[0016] Compared with the prior art, the headrest folding mechanism of the utility model has the advantages of simple structure, convenient manufacturing, high adaptability of shape, improved stability of the connecting support, high stability of the headrest locking, strong impact resistance, compact structure, small size, easy realization of platformization and high universality of the mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the utility model;

[0018] Figure 2 is a front view of Figure 1

[0019] Figure 3 is a side view of Figure 1

[0020] Figure 4 is a structural schematic view of the installing support 1;

[0021] Figure 5 is a structural schematic view of the connecting support 8;

[0022] Figure 6 is a structural schematic view of the limiting sleeve 12;

[0023] Figure 7 is a structural schematic view of the limiting sleeve 12 and the headrest support 11;

[0024] Figure 8 is an enlarged structural schematic view of A in Figure 7

[0025] Figure 9 is a folding schematic view of the utility model. DETAILED DESCRIPTION​​​

[0026] The utility model will be further described below in combination with the embodiments and drawings.

[0027] As Figures 1 to 4 The utility model discloses an electric headrest folding mechanism, which mainly comprises a mounting bracket 1 and a headrest support 11, wherein two straight sliding grooves 2 and two curved sliding grooves 3 are arranged on the left and right side walls of the mounting bracket 1.

[0028] The curved sliding groove 3 comprises an arc-shaped guiding section 3a and a flat buffer section 3b, wherein the flat buffer section 3b is close to the straight sliding groove 2, a cross rod 4 is arranged in the curved sliding groove 3 of the left and right side walls of the mounting bracket 1, a sliding member is arranged in the straight sliding groove 2 of the left and right side walls of the mounting bracket 1, the sliding member is driven to move by a motor 9, the moving direction of the sliding member is perpendicular to the axial direction of the cross rod 4, and a connecting rod 6 is hinged between the cross rod 4 and the sliding member.

[0029] The headrest support 11 is connected with the cross rod 4, and the movement of the cross rod 4 in the curved sliding groove 3 can drive the headrest support 11 to fold.

[0030] The sliding member moves under the action of the motor 9, so that the connecting rod 6 of the side portion can drive the cross rod 4 above to slide in the curved sliding groove 3, when the cross rod 4 slides to the top end of the curved sliding groove 3, the headrest support 11 can be continuously pushed forward to rotate, the electric folding of the headrest is realized, the inconvenience of manual adjustment is avoided, the electric headrest folding mechanism has the advantages of simple structure, convenient manufacturing, compact structure, small volume, easy platform implementation, strong universality of the mechanism, the curved sliding groove 3 can ensure that the headrest can meet the regulation impact test involving the headrest in the use position, and the headrest folding mechanism is arranged on the left and right sides of the mounting bracket 1, so that the headrest folding is more stable.

[0031] The two ends of the cross rod 4 pass through the left and right side walls of the mounting bracket 1 through the curved sliding groove 3, the sliding member is a sliding block 5, the two ends of the sliding block 5 pass through the left and right side walls of the mounting bracket 1 through the straight sliding groove 2, the connecting rod 6 is hinged between the same side passing-through ends of the cross rod 4 and the sliding block 5, and the linkage of the cross rod 4 and the sliding block 5 can be realized.

[0032] The motor 9 is fixed on the mounting bracket 1 away from the headrest support 11, a motor lead screw 10 is threadedly connected to the middle of the sliding block 5, the motor lead screw 10 is arranged perpendicularly to the cross rod 4, the motor lead screw 10 is connected to the output shaft of the motor 9, the motor 9 is firmly connected to the mounting bracket 1, and the motor 9 can provide power for the sliding block 5 to slide on the motor lead screw 10, the length of the screw thread of the motor lead screw 10 is greater than the length of the straight sliding groove 2, a limiting piece 10a is sleeved on the outer end of the motor lead screw 10, the limiting piece 10a is fixed on the mounting bracket 1, the sliding block 5 can slide on the motor lead screw 10, and the limiting piece 10a is arranged to enable the sliding block 5 to only slide on the motor lead screw 10, so that the sliding block 5 cannot slide beyond the height of the motor lead screw 10, thereby the linkage of the connecting rod 6 and the cross rod 4 cannot be continued.

[0033] Fixed on the left and right side walls of the mounting bracket 1 are fixed rods 7 parallel to the cross rod 4, the fixed rods 7 pass through the left and right side walls of the mounting bracket 1 at both ends, connecting brackets 8 are hingedly connected between the passing-through ends of the fixed rods 7 and the cross rod 4 on the same side, the connecting brackets 8 are all correspondingly fixed with the headrest supports 11, and the cross rod 4 and the connecting brackets 8 can be concentrically rotated around the fixed rods 7.

[0034] As shown in Figure 2 and Figure 5 , the connecting bracket 8 is in a “U” shape, one side of the bottom of the connecting bracket 8 extends outward, a through hole 8a is formed in the extending portion, and the connecting bracket 8 is sleeved on the fixed rod 7 through the through hole 8a;

[0035] An arc-shaped strip hole 8b is formed in the bottom of the connecting bracket 8, and the cross rod 4 passes through the connecting rod 6 and extends into the arc-shaped strip hole 8b;

[0036] The arc-shaped strip hole 8b of the connecting bracket 8 corresponds to the curved sliding groove 3, the head of the arc-shaped strip hole 8b coincides with the buffer portion 3b of the curved sliding groove 3, but the length of the arc-shaped strip hole 8b exceeds the length of the buffer portion 3b. When the sliding block 5 slides upward, the cross rod 4 moves in the overlapping portion of the arc-shaped strip hole 8b and the buffer portion 3b of the curved sliding groove 3, after the cross rod 4 moves to the tail of the arc-shaped strip hole 8b, the cross rod 4 continues to move in the curved sliding groove 4 to the top end of the curved sliding groove 3, and the connecting bracket 8 and the headrest support 11 can continue to rotate around the fixed rod 7, so that the headrest support 11 is folded downward, and the arc-shaped strip hole 8b arranged on the connecting bracket 8 and the buffer portion 3b cooperate with each other to have a certain buffering effect, so as to avoid causing harm to the user who is slow to react or damaging the folding mechanism during adjustment.

[0037] As shown in Figures 6 to 8As shown, the connecting bracket 8 is provided with mounting holes 8c on the two opposite side walls, and a limiting sleeve 12 is arranged between the two mounting holes 8c, and the headrest bracket 11 is fixed to the connecting bracket 8 through the limiting sleeve 12.

[0038] The limiting sleeve 12 is provided with two first limiting tables 12a at one end and a second limiting table 12b at the other end, and the first limiting table 12a and the second limiting table 12b are arranged in the same direction, wherein the second limiting table 12b is in the same horizontal line with one of the first limiting tables 12a, and the limiting sleeve 12 can be fixed to the connecting bracket 8 through the first limiting table 12a and the second limiting table 12b, and a ring groove 12c is arranged on the limiting sleeve 12 close to the first limiting table 12a, and the ring groove 12c is closed at the top of one side, and the headrest bracket 11 is provided with a notch 11a corresponding to the ring groove 12c, and a fixing ring 13 is arranged in the ring groove 12c, and the fixing ring 13 can be inserted into the notch 11a of the headrest bracket 11 and fixed with the ring groove 12c of the limiting sleeve 12, so as to ensure the connection stability of the headrest bracket 11.

[0039] As shown in the figure, Figure 1 When the electric headrest folding mechanism is not turned over, the sliding block 5 is located at the bottom end of the straight sliding groove 2, and the cross rod 4 is located in the flat buffer section 3b of the curved sliding groove 3, as shown in the figure, Figure 9 When the electric headrest folding mechanism is turned over, the sliding block 5 drives the outer connecting rod 6, so as to push the cross rod 4 to the top end of the curved sliding groove 3, and then the headrest bracket 11 is folded downward.

[0040] The use principle of the electric headrest folding mechanism is that the motor 9 provides power for the sliding of the sliding block 5 on the motor lead screw 10, the connecting rod 6 outside the straight sliding groove 2 can move upward together with the sliding block 5, the upper cross rod 4 can move in the flat buffer section 3b and the arc-shaped strip-shaped hole 8b under the action of the connecting rod 6, so as to play a buffering role, the cross rod 4 continues to move in the arc-shaped guide section 3a of the curved sliding groove 3, and drives the outer connecting bracket 8 to rotate around the fixed rod 7, so as to realize concentric rotation, so that the headrest bracket 11 fixed to the connecting bracket 8 rotates together, and finally realizes the electric folding of the headrest, and the curved sliding groove 3 ensures that the headrest can meet the regulation impact test involving the headrest in the use position, can make the headrest locking stable, and has strong impact resistance.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present application, and those skilled in the art can make various similar expressions under the inspiration of the present application without deviating from the purpose and claims of the present application, and such changes fall within the protection scope of the present application.

Claims

1. An electric headrest folding mechanism, characterized by: The utility model relates to a headrest support structure, including installation support (1) and headrest support (11), wherein two two opposite linear slide groove (2) and two two opposite curved slide groove (3) are all arranged on the left and right side walls of installation support (1), The curved slide groove (3) includes an arc-shaped guide section (3a) and a straight buffer section (3b), wherein the straight buffer section (3b) is close to the linear slide groove (2), a crossbar (4) is arranged in the curved slide groove (3) of the left and right side walls of the installation support (1), a sliding member is arranged in the linear slide groove (2) of the left and right side walls of the installation support (1), the sliding member is driven to move by a motor (9), the moving direction of the sliding member is perpendicular to the axial direction of the crossbar (4), and a connecting rod (6) is hingedly connected between the crossbar (4) and the sliding member, The headrest support (11) is connected with the crossbar (4), and the movement of the crossbar (4) in the curved slide groove (3) can drive the headrest support (11) to be folded.

2. The power headrest folding mechanism according to claim 1, characterized in that: The two ends of the crossbar (4) pass through the left and right side walls of the installation support (1) through the curved slide groove (3), the sliding member is a sliding block (5), the two ends of the sliding block (5) pass through the left and right side walls of the installation support (1) through the linear slide groove (2), and the connecting rod (6) is hingedly connected between the same side passing-out ends of the crossbar (4) and the sliding block (5).

3. The power headrest folding mechanism according to claim 2, wherein: The motor (9) is fixed on the installation support (1) away from the headrest support (11), a motor lead screw (10) is threadedly connected in the middle of the sliding block (5), the motor lead screw (10) is arranged perpendicularly to the crossbar (4), and the motor lead screw (10) is connected with the output shaft of the motor (9).

4. The power headrest folding mechanism according to claim 2 or 3, characterized in that: Fixed rods (7) parallel to the crossbar (4) are fixed on the left and right side walls of the installation support (1), the two ends of the fixed rods (7) pass through the left and right side walls of the installation support (1), connecting brackets (8) are hingedly connected between the same side passing-out ends of the fixed rods (7) and the crossbar (4), and the connecting brackets (8) are all correspondingly fixed with the headrest support (11).

5. The power headrest folding mechanism according to claim 3, wherein: The screw thread length of the motor lead screw (10) is greater than the length of the linear slide groove (2), a limiting piece (10a) is sleeved on the outer end of the motor lead screw (10), and the limiting piece (10a) is fixed on the installation support (1).

6. The power headrest folding mechanism of claim 4, wherein: The connecting bracket (8) has a "U" type structure, one side of the bottom of the connecting bracket (8) extends outward, a through hole (8a) is formed in the extension part, and the connecting bracket (8) is sleeved on the fixed rod (7) through the through hole (8a); An arc-shaped strip hole (8b) is formed in the bottom of the connecting bracket (8), and the crossbar (4) passes through the connecting rod (6) and extends into the arc-shaped strip hole (8b); Mounting holes (8c) are formed in the opposite side walls of the connecting bracket (8), a limiting sleeve (12) is arranged between the two mounting holes (8c), and the headrest support (11) is fixed on the connecting bracket (8) through the limiting sleeve (12).

7. The power headrest folding mechanism according to claim 6, wherein: The limiting sleeve (12) is provided with two first limiting tables (12a) on one end and a second limiting table (12b) on the other end, the first limiting table (12a) and the second limiting table (12b) are arranged in the same direction, wherein the second limiting table (12b) is in the same horizontal line with one of the first limiting tables (12a).

8. The power headrest folding mechanism according to claim 7, wherein: A ring groove (12c) is formed on the limiting sleeve (12) near the first limiting table (12a), the ring groove (12c) is closed on the upper side of one side, the headrest support (11) is provided with a notch (11a) corresponding to the ring groove (12c), and a fixing ring (13) is arranged in the ring groove (12c), the fixing ring (13) can extend into the notch (11a) of the headrest support (11).

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