Electric headrest folding mechanism

Abstract

The invention discloses an electric headrest folding mechanism which comprises a mounting support and a headrest support, and linear sliding grooves and curve sliding grooves are formed in the left side wall and the right side wall of the mounting support; 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 shape 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 invention relates to the technical field of automobile seats, and in particular to an electric headrest folding mechanism. Background Art

[0002] At present, the flip headrests of existing car seat products are generally operated manually. When the manual flip headrest is flipped, the impact is large and it is easy to produce abnormal noise. The adjustment method of the manual flip headrest is relatively cumbersome and requires manual operation, which is inconvenient and affects the driving experience. The manual flip headrest may not provide sufficient support and protection in the event of a collision, increasing the risk of neck injuries. Therefore, the manual flip headrest is converted to an electric flip headrest, but it still faces some problems, such as weak impact resistance, low styling adaptability, complex structure and difficult manufacturing, high production and maintenance costs, and difficult maintenance. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an electric headrest folding mechanism with simple structure and convenient manufacturing.

[0004] The technical solution is as follows: an electric headrest folding mechanism, the main points of which are that it includes a mounting bracket and a headrest bracket, wherein both left and right side walls of the mounting bracket are provided with two opposite linear slide grooves and two opposite curved slide grooves;

[0005] The curved slide groove comprises an arc-shaped guide section and a straight buffer section, wherein the arc-shaped buffer section is close to the linear slide groove, a cross bar is provided in the curved slide groove on the left and right side walls of the mounting bracket, and a sliding member is provided in the linear slide groove on the left and right side walls of the mounting bracket, the sliding member is driven to move by a motor, the moving direction of the sliding member is perpendicular to the axial direction of the cross bar, and a connecting rod is hinged between the cross bar and the sliding member;

[0006] The headrest support rod is connected to the cross bar, and the movement of the cross bar in the curved slide groove can drive the headrest bracket to fold. The above structure is simple in structure, easy to manufacture, compact in structure and small in size, easy to realize platformization, and has strong mechanism versatility. The sliding parts can slide upward in the linear slide grooves opposite to each other, and drive the upper cross column to slide and fold in the curved slide groove through the external connecting rod. When the cross bar slides to the top of the curved slide groove, it can continue to push the headrest bracket forward to rotate. The curved slide groove can lock the headrest stably, and can ensure that the headrest can meet the regulatory impact test related to the headrest in the use position. At the same time, the headrest folding mechanism is arranged on both sides of the mounting bracket, making the headrest folding more stable.

[0007] Preferably, the two ends of the crossbar pass through the left and right side walls of the mounting bracket through a curved slide groove, the sliding member is a slider, the two ends of the slider pass through the left and right side walls of the mounting bracket through a linear slide groove, and the connecting rod is hinged between the passing ends of the crossbar and the slider on the same side. With the above structure, the linkage between the sliding member and the crossbar can be achieved through the connecting rod, and when the sliding member moves upward, it can drive the upper crossbar to slide in the curved slide groove.

[0008] Preferably, the motor is fixed on the mounting bracket away from the headrest bracket, a motor lead screw is threadedly connected to the middle of the slider, the motor lead screw is arranged vertically with the cross bar, and the motor lead screw is connected to the output shaft of the motor. With the above structure, the motor can be fixed on the mounting bracket to avoid movement or falling off during use, and the motor lead screw is connected to the output shaft of the motor, which can provide power for the slider to move on the motor lead screw.

[0009] Preferably, a fixing rod parallel to the cross bar is fixed to the left and right side walls of the mounting bracket, and both ends of the fixing rod pass through the left and right side walls of the mounting bracket, and a connecting bracket is hinged between the ends passing through the fixing rod and the cross bar on the same side, and the connecting brackets are fixed to the headrest brackets. With the above structure, the cross bar can rotate concentrically around the fixing rod, thereby driving the headrest bracket fixed on the connecting bracket to fold.

[0010] Preferably, the lead screw thread length of the motor lead screw is greater than the length of the linear slide slot, and a limiter is mounted on the outer end of the motor lead screw, and the limiter is fixed on the mounting bracket. With the above structure, the limiter is set so that the slider can only slide on the lead screw, so as to prevent the slider from exceeding the height of the lead screw when sliding, thereby failing to achieve linkage with the cross bar through the connecting rod.

[0011] Preferably, the connecting bracket is in a "U"-shaped structure, one side of the bottom of the connecting bracket extends outward, a through hole is provided on the extension, and the connecting bracket is sleeved on the fixing rod through the through hole;

[0012] An arc-shaped strip hole is opened at the bottom of the connecting bracket, and the cross bar passes through the connecting rod and extends into the arc-shaped strip hole;

[0013] The two side walls facing the connecting bracket are provided with mounting holes, and a limiting sleeve is provided between the two mounting holes, and the headrest bracket is fixed to the connecting bracket through the limiting sleeve. With the above structure, the connecting bracket and the fixing rod are hinged, the connecting bracket can rotate around the fixing rod, and the cross bar can slide in the curved slide groove and the arc-shaped mounting hole, which has a certain buffering effect. The headrest bracket is arranged on the connecting bracket through the limiting sleeve, which can realize that when the connecting bracket rotates, the headrest bracket is driven to rotate together.

[0014] Preferably, two first limit platforms are arranged on one end of the limit sleeve, and a second limit platform is arranged on the other end, the first limit platform and the second limit platform are arranged in the same direction, and the second limit platform is on the same horizontal line as one of the first limit platforms. With the above structure, the limit sleeve can be fixedly mounted on the connecting bracket through the limit platform, which can effectively prevent it from falling off during use.

[0015] Preferably, a ring groove is provided on the limiting sleeve near the first limiting platform, the upper part of one side of the ring groove is closed, the headrest bracket is provided with a notch corresponding to the ring groove, a fixing ring is provided in the ring groove, and the fixing ring can extend into the notch of the headrest bracket. With the above structure, the headrest bracket can be fixed in the limiting sleeve through the fixing ring, the ring groove and the notch, thereby avoiding the possibility of displacement of the headrest bracket.

[0016] Compared with the prior art, the present invention has the following beneficial effects: simple structure, easy manufacturing, the headrest folding mechanism can realize concentric rotation around the fixed rod, and has high adaptability to the shape; connecting rods and connecting brackets are arranged on both sides of the mounting bracket, which can improve its stability, and the curved slide groove can make the headrest lock stably, with strong impact resistance, compact structure and small volume, easy to realize platformization, and strong mechanism versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 for Figure 1 A front view of

[0019] Figure 3 for Figure 1 Side view of

[0020] Figure 4 It is a structural schematic diagram of the mounting bracket 1;

[0021] Figure 5 is a schematic diagram of the structure of the connecting bracket 8;

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

[0023] Figure 7 It is a schematic structural diagram of the limiting sleeve 12 and the headrest bracket 11;

[0024] Figure 8 for Figure 7 A is a schematic diagram of the enlarged structure of the middle part;

[0025] Fig. 9 It is a folding schematic diagram of the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with embodiments and drawings.

[0027] like Figures 1 to 4 As shown, an electric headrest folding mechanism mainly comprises a mounting bracket 1 and a headrest bracket 11, wherein two opposite linear slide grooves 2 and two opposite curved slide grooves 3 are arranged on the left and right side walls of the mounting bracket 1;

[0028] The curved slide groove 3 includes an arc-shaped guide section 3a and a straight buffer section 3b, wherein the arc-shaped buffer section 3b is close to the linear slide groove 2, a cross bar 4 is provided in the curved slide groove 3 on the left and right side walls of the mounting bracket 1, and a sliding member is provided in the linear slide groove 2 on the left and right side walls of the mounting bracket 1, and the sliding member is driven to move by a motor 9, and the moving direction of the sliding member is perpendicular to the axial direction of the cross bar 4, and a connecting rod 6 is hinged between the cross bar 4 and the sliding member;

[0029] The headrest bracket 11 is connected to the cross bar 4 , and the cross bar 4 moves in the curved slide groove 3 to drive the headrest bracket 11 to fold.

[0030] The sliding member moves under the action of the motor 9, so that the side connecting rod 6 can drive the upper cross bar 4 to slide in the curved slide groove 3. When the cross bar 4 slides to the top of the curved slide groove 3, it can continue to push the headrest bracket 11 forward to rotate, thereby realizing the electric folding of the headrest and avoiding the inconvenience of manual adjustment. At the same time, the electric headrest folding mechanism has a simple structure and is easy to manufacture. It has a compact structure and a small size, is easy to platformize, and has strong mechanism versatility. At the same time, the curved slide groove 3 can ensure that the headrest can meet the regulatory impact test related to 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 bar 4 pass through the left and right side walls of the mounting bracket 1 through the curved slide groove 3. The sliding member is a slider 5. The two ends of the slider 5 pass through the left and right side walls of the mounting bracket 1 through the straight slide groove 2. The connecting rod 6 is hinged between the passing ends on the same side of the cross bar 4 and the slider 5, which can realize the linkage of the cross bar 4 and the slider 5.

[0032] The motor 9 is fixed on the mounting bracket 1 away from the side of the headrest bracket 11, and a motor screw 10 is threadedly connected to the middle part of the slider 5. The motor screw 10 is arranged vertically to the cross bar 4, and the motor screw 10 is connected to the output shaft of the motor 9. The motor 9 is firmly connected to the mounting bracket 1, and can provide power for the slider 5 to slide on the motor screw 10. The screw thread length of the motor screw 10 is greater than the length of the linear slide groove 2. A limiting member 10a is set on the outer end of the motor screw 1, and the limiting member 10a is fixed on the mounting bracket 1. The slider 5 can slide on the motor screw 10. The limiting member 10a is set so that the slider 5 can only slide on the motor screw 10, so as to avoid the slider 5 exceeding the height of the motor screw 10 when sliding, so that it cannot continue to be linked with the cross bar 4 through the connecting rod 6.

[0033] A fixing rod 7 parallel to the cross bar 4 is fixed to the left and right side walls of the mounting bracket 1, and both ends of the fixing rod 7 pass through the left and right side walls of the mounting bracket 1. A connecting bracket 8 is hingedly connected between the passing ends on the same side of the fixing rod 7 and the cross bar 4. The connecting bracket 8 corresponds to and fixes the headrest bracket 11, so that the cross bar 4 and the connecting bracket 8 can realize concentric rotation around the fixing rod 7.

[0034] like Figure 2 and Figure 5 As shown, the connecting bracket 8 is in a "U"-shaped structure, one side of the bottom of the connecting bracket 8 extends outward, a through hole 8a is provided on the extension, and the connecting bracket 8 is sleeved on the fixing rod 7 through the through hole 8a;

[0035] An arc-shaped strip hole 8b is provided at the bottom of the connecting bracket 8, and the cross bar 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 is arranged corresponding to the curved slide groove 3, and the head of the arc-shaped strip hole 8b overlaps with the buffer part 3b of the curved slide groove 3, but the length of the arc-shaped strip hole 8b exceeds the length of the buffer part 3b. When the slider 5 slides upward, it drives the cross bar 4 to move in the overlapping part of the arc-shaped strip hole 8b and the buffer part 3b of the curved slide groove 3. After moving to the tail of the arc-shaped strip hole 8b, the cross bar 4 continues to move in the curved slide groove 4 to the top of the curved slide groove 3, and can continue to drive the connecting bracket 8 and the headrest bracket 11 to rotate around the fixing rod 7, so that the headrest bracket 11 can be folded downward. The arc-shaped strip hole 8b and the buffer part 3b arranged on the connecting bracket 8 cooperate with each other, which can play a certain buffering role, avoiding injury to slow-reacting users or damage to the folding mechanism during the adjustment process.

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

[0038] Two first limit platforms 12a are provided on one end of the limit sleeve 12, and a second limit platform 12b is provided on the other end. The first limit platform 12a and the second limit platform 12b are arranged in the same direction, wherein the second limit platform 12b and one of the first limit platforms 12b are on the same horizontal line, and the limit sleeve 12 can be fixed to the connecting bracket 8 through the first limit platform 12a and the second limit platform 12b. An annular groove 12c is provided on the limit sleeve 12 near the first limit platform 12a, and the upper side of one side of the annular groove 12c is closed. The headrest bracket 11 has a notch 11a corresponding to the annular groove 12c, and a fixing ring 13 is provided in the annular groove 12c. The fixing ring 13 can extend into the notch 11a of the headrest bracket 11 and be fixed to the annular groove 12c of the limit sleeve 12, thereby ensuring the connection stability of the headrest bracket 11.

[0039] like Figure 1 As shown, when the electric headrest folding mechanism is not flipped, the slider 5 is located at the bottom end of the linear slide 2, and the cross bar 4 is located in the straight buffer section 3b of the curved slide 3. Fig. 9 As shown, when the electric headrest folding mechanism is turned over, the slider 5 drives the outer connecting rod 6, thereby pushing the cross bar 4 to reach the top of the curved slide groove 3, and then the headrest bracket 11 is turned downward.

[0040] The operating principle of the electric headrest folding mechanism is as follows: the motor 9 provides power for the slider 5 to slide on the motor screw 10, and the connecting rod 6 outside the linear slide 2 can move up with the slider 5. Under the action of the connecting rod 6, the upper cross bar 4 can now move in the straight buffer section 3b and the arc-shaped strip hole 8b to play a buffering role. The cross bar 4 continues to move in the arc-shaped guide section 3a of the curved slide 3, and drives the external connecting bracket 8 to rotate around the fixed rod 7 to achieve concentric rotation, so that the headrest bracket 11 fixed on the connecting bracket 8 rotates together, and finally the headrest is electrically folded. The curved slide 3 ensures that the headrest can meet the regulatory impact test related to the headrest in the use position, and can make the headrest lock stable and have strong impact resistance.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. An electric headrest folding mechanism, characterized in that: It comprises a mounting bracket (1) and a headrest bracket (11), wherein two opposite linear slide grooves (2) and two opposite curved slide grooves (3) are arranged on the left and right side walls of the mounting bracket (1); The curved slide groove (3) comprises an arc-shaped guide section (3a) and a straight buffer section (3b), wherein the arc-shaped buffer section (3b) is close to the linear slide groove (2), a cross bar (4) is inserted into the curved slide groove (3) on the left and right side walls of the mounting bracket (1), and a sliding member is inserted into the linear slide groove (2) on 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 bar (4), and a connecting rod (6) is hinged between the cross bar (4) and the sliding member; The headrest bracket (11) is connected to the cross bar (4), and the cross bar (4) can drive the headrest bracket (11) to fold when it moves in the curved sliding groove (3).

2. The electric headrest folding mechanism according to claim 1, characterized in that: The two ends of the cross bar (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 slider (5); the two ends of the slider (5) pass through the left and right side walls of the mounting bracket (1) through the straight sliding groove (2); and the connecting rod (6) is hinged between the passing ends on the same side of the cross bar (4) and the slider (5).

3. The electric headrest folding mechanism according to claim 2, characterized in that: The motor (9) is fixed on the mounting bracket (1) at a side away from the headrest bracket (11), and a motor screw (10) is threadedly connected to the middle of the slider (5). The motor screw (10) is arranged vertically to the cross bar (4), and the motor screw (10) is connected to the output shaft of the motor (9).

4. An electric headrest folding mechanism according to claim 2 or 3, characterized in that: A fixing rod (7) parallel to the cross bar (4) is fixed to the left and right side walls of the mounting bracket (1), and both ends of the fixing rod (7) pass through the left and right side walls of the mounting bracket (1). A connecting bracket (8) is hingedly connected between the passing ends on the same side of the fixing rod (7) and the cross bar (4), and the connecting bracket (8) is fixed to the headrest bracket (11) accordingly.

5. The electric headrest folding structure according to claim 4, characterized in that: The screw thread length of the motor screw (10) is greater than the length of the linear slide groove (2), and a limiting member (10a) is sleeved on the outer end of the motor screw (10), and the limiting member (10a) is fixed on the mounting bracket (1).

6. The electric headrest folding mechanism according to claim 4, characterized in that: The connecting bracket (8) is in a "U"-shaped structure, one side of the bottom of the connecting bracket (8) extends outward, a through hole (8a) is provided on the extended portion, and the connecting bracket (8) is sleeved on the fixing rod (7) through the through hole (8a); An arc-shaped strip hole (8b) is provided at the bottom of the connecting bracket (8), and the cross bar (4) passes through the connecting rod (6) and extends into the arc-shaped strip hole (8b); Mounting holes (8c) are provided on both side walls facing the connecting bracket (8), a limiting sleeve (12) is provided between the two mounting holes (8c), and the headrest bracket (11) is fixed to the connecting bracket (8) via the limiting sleeve (12).

7. The electric headrest folding mechanism according to claim 6, characterized in that: Two first limiting platforms (12a) are arranged on one end of the limiting sleeve (12), and a second limiting platform (12b) is arranged on the other end, wherein the first limiting platform (12a) and the second limiting platform (12b) are arranged along the same direction, wherein the second limiting platform (12b) and one of the first limiting platforms (12b) are on the same horizontal line.

8. The electric headrest folding mechanism according to claim 7, characterized in that: An annular groove (12c) is provided on the limiting sleeve (12) near the first limiting platform (12a), the upper part of one side of the annular groove (12c) is closed, the headrest bracket (11) is provided with a notch (11a) corresponding to the annular groove (12c), a fixing ring (13) is arranged in the annular groove (12c), and the fixing ring (13) is clamped in the notch (11a) of the headrest bracket (11).

Images