Seat with collision locking mechanism

Abstract

The utility model relates to a seat with a collision locking mechanism, the seat can move between a first position and a second position relative to a fixed base, the collision locking mechanism comprises a cross rod used for being fixed on the fixed base, a lock hook used for being rotatably installed on the seat, and a rotating arm rotatably connected with the lock hook, the rotating arm can rotate between a first state and a second state; when the rotating arm is in the first state, the rotating arm guides the lock hook to cross the cross rod so as to allow the seat to move from a first position to a second position relative to the fixed base; and when the rotating arm is in the second state, the lock hook is hung on the cross rod to limit the seat to move from the first position to the second position relative to the fixed base. The safety seat is stable in locking effect, solves the technical problem that the seat moves mistakenly due to inertia when encountering great acceleration in the prior art, and can reduce harm to human bodies caused by acceleration impact.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to a seat with a collision locking mechanism. Background Art

[0002] In recent years, the automobile industry has developed rapidly. In order to provide a wider field of view for the rear seats of the car, a foldable passenger seat structure came into being. After the passenger seat backrest is folded, the field of view can be greatly increased. However, since the heights of the seat cushion and the two sides of the cushion are higher than the height of the middle, if the passenger seat backrest is folded directly, the folding angle will be affected, so that the passenger seat backrest cannot be folded to a horizontal angle, thereby partially blocking the field of view or failing to provide a footrest for users in the rear seats. To solve this problem, the passenger seat cushion can be moved forward while the passenger seat backrest remains in place, providing sufficient folding space for the passenger seat backrest, so that the upper part of the passenger seat backrest is overlapped with the seat cushion position, and folded to a horizontal angle.

[0003] Although moving the passenger seat forward solves the problem that the backrest cannot be folded to a horizontal angle, another problem also arises. After the passenger seat is moved forward, there is no other locking structure. When the vehicle collides, the passenger seat cannot be locked, which makes it easy for the passenger seat to move incorrectly due to inertia, causing harm to the human body.

[0004] In the prior art, other parts of the car may have locking mechanisms, such as a gravity self-locking mechanism for an armrest and its design method, which is published in CN112297977A. It discloses a gravity lock structure for an armrest, and its function depends on the magnitude of acceleration. Therefore, the movement of the locking plate is greatly affected by acceleration and other factors, which may cause locking failure. Moreover, because the mechanism has an acceleration process, the movement of the function is longer, resulting in a longer response time for the function. Therefore, a collision locking mechanism is now needed to solve the problem of locking the passenger seat cushion. Utility Model Content

[0005] In view of the deficiencies existing in the above-mentioned prior art, the utility model provides a seat with a collision locking mechanism, which solves the technical problem in the prior art that the seat moves incorrectly due to inertia when encountering a collision with extremely large acceleration.

[0006] A seat with a collision locking mechanism of the present utility model includes a fixed base. The seat is movable relative to the fixed base between a first position and a second position. The collision locking mechanism is disposed between the seat and the fixed base and includes a cross bar for fixing on the fixed base, a locking hook rotatably mounted on the seat, and a rotating arm rotatably connected to the locking hook. The rotating arm is configured to be rotatable between a first state and a second state. When the rotating arm is in the first state, the rotating arm guides the locking hook over the cross bar to allow the seat to move relative to the fixed base from the first position to the second position. When the rotating arm is in the second state, the locking hook is hooked on the cross bar to restrict the seat from moving relative to the fixed base from the first position to the second position.

[0007] The seat with a collision locking mechanism of the present utility model is further improved in that one end of the locking hook forms a hook portion for hooking on the cross bar, and the rotating arm is rotatably connected to the hook portion. When in the first state, the rotating arm is inclined towards the cross bar so as to lift the hook portion after contacting the cross bar.

[0008] The seat with a collision locking mechanism of the present utility model is further improved in that the collision locking mechanism further includes a circlip. The locking hook is provided with a through hole for the circlip to pass through, and a clamping groove is provided at one end of the rotating arm away from the hook portion. When in the first state, the clamping groove of the rotating arm is clamped with the circlip so that the rotating arm is inclined towards the cross bar.

[0009] The seat with a collision locking mechanism of the present utility model is further improved in that when in the second state, the clamping groove of the rotating arm is disengaged from the circlip so that the locking hook is hooked on the cross bar.

[0010] The seat with a collision locking mechanism of the present utility model is further improved in that the hook portion has an inclined surface opposite to the inclination direction of the rotating arm. When the seat moves relative to the fixed base from the second position to the first position, the inclined surface contacts the cross bar and lifts the hook portion so that the locking hook can cross over the cross bar.

[0011] The seat with a collision locking mechanism of the present utility model is further improved in that the number of the locking hooks is two, and the two locking hooks are arranged side by side at intervals, and the rotating arm is disposed between the two locking hooks.

[0012] The seat with a collision locking mechanism of the present utility model is further improved in that the collision locking mechanism further includes a spring. One end of the spring is connected to the seat, and the other end is connected to the other end of the locking hook away from the hook portion.

[0013] The seat with a collision locking mechanism of the present utility model is further improved in that the spring is configured to apply a pulling force to the locking hook so that the locking hook can reset after crossing over the cross bar.

[0014] The further improvement of the seat with a collision locking mechanism in the present utility model lies in that two such locking hooks are rotatably mounted on the seat through a first rotating shaft, and a sleeve is sleeved on the first rotating shaft and located between the two locking hooks.

[0015] The further improvement of the seat with a collision locking mechanism in the present utility model lies in that the rotating arm is rotatably mounted on the locking hook through a second rotating shaft.

[0016] Compared with the prior art, the effect of the present utility model is positive and obvious. When a collision occurs, the cross bar impacts the rotating arm in the present utility model, causing the clamping spring to deform and the rotating arm to disengage from the clamping spring, while the hooked portion of the locking hook catches the cross bar, or the rotating arm breaks, and the hooked portion of the locking hook catches the cross bar to achieve the purpose of locking the seat. The locking effect of the present utility model is stable, solving the technical problem that the seat in the prior art moves erroneously due to inertia when encountering a great acceleration, and can reduce the injury caused by the acceleration impact to the human body. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the installation position of the collision locking mechanism in the present utility model.

[0019] Figure 2 It is a schematic diagram of the collision locking mechanism before the seat cushion of the present utility model is lifted.

[0020] Figure 3 It is a schematic diagram of the change of the collision locking mechanism when the seat cushion of the present utility model is lifted.

[0021] Figure 4 It is a schematic diagram of the structure of the collision locking mechanism in the present utility model at a first angle.

[0022] Figure 5 It is a schematic diagram of the structure of the collision locking mechanism in the present utility model at a second angle.

[0023] Figure 6 It is a schematic diagram of the structure of the collision locking mechanism in the present utility model at a third angle.

[0024] Figure 7 It is a schematic diagram of the structure of the collision locking mechanism in the present utility model at a fourth angle.

[0025] Figure 8 Exploded view of the collision locking mechanism in the present utility model.

[0026] Figure 9 Side view of the change state of the collision locking mechanism in the present utility model from the first position to the second position in the normal state.

[0027] Figure 10 Side sectional view of the change state of the collision locking mechanism in the present utility model from the first position to the second position in the normal state.

[0028] Figure 11 Second side view of the change state of the collision locking mechanism in the present utility model from the first position to the second position in the normal state.

[0029] Figure 12 Second side sectional view of the change state of the collision locking mechanism in the present utility model from the first position to the second position in the normal state.

[0030] Figure 13 Third side view of the change state of the collision locking mechanism in the present utility model from the first position to the second position in the normal state.

[0031] Figure 14 Third side sectional view of the change state of the collision locking mechanism in the present utility model from the first position to the second position in the normal state.

[0032] Figure 15 Fourth side view of the change state of the collision locking mechanism in the present utility model from the first position to the second position in the normal state.

[0033] Figure 16 Fourth side sectional view of the change state of the collision locking mechanism in the present utility model from the first position to the second position in the normal state.

[0034] Figure 17 Side view of the change state of the collision locking mechanism in the present utility model from the second position back to the first position in the normal state.

[0035] Figure 18 Side sectional view of the change state of the collision locking mechanism in the present utility model from the second position back to the first position in the normal state.

[0036] Figure 19 Second side view of the change state of the collision locking mechanism in the present utility model from the second position back to the first position in the normal state.

[0037] Figure 20 Second side sectional view of the change state of the collision locking mechanism in the present utility model from the second position back to the first position in the normal state.

[0038] Figure 21 The third side view of the changing state when the collision locking mechanism in the present utility model returns from the second position to the first position in the normal state.

[0039] Figure 22 The third side sectional view of the changing state when the collision locking mechanism in the present utility model returns from the second position to the first position in the normal state.

[0040] Figure 23 The fourth side view of the changing state when the collision locking mechanism in the present utility model returns from the second position to the first position in the normal state.

[0041] Figure 24 The fourth side sectional view of the changing state when the collision locking mechanism in the present utility model returns from the second position to the first position in the normal state.

[0042] Figure 25 The first side view of the changing state when the collision locking mechanism in the present utility model is in the collision impact state.

[0043] Figure 26 The first side sectional view of the changing state when the collision locking mechanism in the present utility model is in the collision impact state.

[0044] Figure 27 The second side view of the changing state when the collision locking mechanism in the present utility model is in the collision impact state.

[0045] Figure 28 The second side sectional view of the changing state when the collision locking mechanism in the present utility model is in the collision impact state.

[0046] Figure 29 The third side view of the changing state when the collision locking mechanism in the present utility model is in the collision impact state.

[0047] Figure 30 The third side sectional view of the changing state when the collision locking mechanism in the present utility model is in the collision impact state.

[0048] Figure 31 The fourth side view of the changing state when the collision locking mechanism in the present utility model is in the collision impact state.

[0049] Figure 32 The fourth side sectional view of the changing state when the collision locking mechanism in the present utility model is in the collision impact state.

[0050] Wherein: 1. Front connecting bracket; 2. Seat side plate; 3. Slide rail; 4. Rear connecting bracket; 5. Spring; 6. First rotating shaft; 7. Lock hook; 71. Strip-shaped hole; 72. Hook portion; 8. Snap ring; 9. Rotating arm; 91. Card slot; 10. Second rotating shaft; 11. Cross bar; 12. Sleeve; 13. Chute; 14. Spring bracket; 15. Fixed base; 16. Motor; 17. Slide block. Detailed implementation manner

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0052] In this embodiment, the collision locking mechanism is installed above the upper track of the front and rear adjustment track of the co-pilot seat and is used for the locking structure after the co-pilot seat cushion moves forward. When a vehicle collision occurs, the co-pilot seat cushion can be locked, thereby avoiding the co-pilot seat cushion from being easily misaligned due to inertia and causing harm to the human body.

[0053] As Figures 1 to 32 shown, the seat with a collision locking mechanism provided by the present invention includes a fixed base. The seat can move between a first position and a second position relative to the fixed base 15. The collision locking mechanism is disposed between the seat and the fixed base 15, as in Figure 1 the position of the A circle in. It includes a cross bar 11 for fixing on the fixed base 15, a lock hook 7 for rotatably installing on the seat, and a rotating arm 9 rotatably connected to the lock hook 7. The rotating arm 9 is arranged to be rotatable between a first state and a second state; when the rotating arm 9 is in the first state, the rotating arm 9 guides the lock hook 7 to cross over the cross bar 11 to allow the seat to move from the first position to the second position relative to the fixed base 15; when the rotating arm 9 is in the second state, the lock hook 7 is hooked on the cross bar 11 to restrict the seat from moving from the first position to the second position relative to the fixed base 15. In this embodiment, the cross bar 11 is L-shaped, and a limiting hook for hooking on the fixed base 15 is formed by extending one end of the second end of the cross bar 11 away from the lock hook 7, so as to avoid excessive collision impact force and cause the cross bar 11 to break away from the fixed base 15.

[0054] Specifically, when the seat is subjected to a collision impact, the rotating arm 9 rotates from the first state to the second state. As Figures 1 to 3As shown, after the seat cushion of the seat moves forward, if it is necessary to fold the backrest to a horizontal angle, it is necessary to lift the front part of the seat cushion. When the front connecting bracket of the seat cushion is lifted by electric drive, the seat cushion moves forward along the slide rail 3. During the lifting process, the locking hook 7 will normally move from the first position to the second position. During this process, the collision locking mechanism is in a good state.

[0055] Preferably, as Figures 4 to 8 shown, one end of the locking hook 7 is formed with a hook portion 72 for hanging on the cross bar 11. The rotating arm 9 is rotatably connected to the hook portion 72. When in the first state, the rotating arm 9 is inclined towards the cross bar 11 so as to lift the hook portion 72 after contacting the cross bar 11. The hook portion 72 is formed at a position far from the end rotatably installed on the seat. The rotating arm 9 is inclined towards the cross bar 11, so as to provide a guiding surface for the locking hook 7 to disengage from the cross bar 11 when the seat moves from the first position to the second position.

[0056] Preferably, as Figures 4 to 8 shown, the collision locking mechanism further includes a circlip 8. The locking hook 7 is provided with a through hole 71 for the circlip 8 to pass through. One end of the rotating arm 9 away from the hook portion 72 is provided with a clamping groove 91. When in the first state, the clamping groove 91 of the rotating arm 9 is clamped with the circlip 8 so that the rotating arm 9 is inclined towards the cross bar 11. Further, in the first state, the height of the lower groove wall of the clamping groove 91 is greater than that of the upper groove wall, so that the rotating arm 9 is tightly clamped with the circlip 8 and is not likely to fall off. The rotating arm 9 is rotatably connected to the hook portion 72, and the hook portion 72 is a downward hook. The through hole 71 is located at the middle position of the locking hook 7. Thus, when the rotating arm 9 is clamped with the circlip 8, the rotating arm 9 is inclined towards the cross bar 11, which is convenient for the seat to move from the first position to the second position relative to the fixed base 15 and take the hook portion 72 away from the position of the cross bar 11. Specifically, the circlip 8 is U-shaped, and the connection line of the two side rods of the circlip 8 coincides with or is parallel to the axis of the rotating arm 9, and the axis of the through hole 71 is parallel to the axis of the rotating arm 9.

[0057] Preferably, as Figures 25 to 32 shown, when in the second state, the clamping groove 91 of the rotating arm 9 is disengaged from the circlip 8 so that the locking hook 7 is hung on the cross bar 11. When the rotating arm 9 rotates from the first state to the second state, due to the excessive acceleration of the collision impact, the rotating arm 9 quickly contacts the cross bar 11 and rotates away from the cross bar 11, or directly breaks, so that the hook portion 72 is hung on the cross bar 11, thus realizing the braking of the seat.

[0058] Preferably, as Figures 4 to 8As shown, the hook portion 72 has an inclined surface 73 with an inclination direction opposite to that of the rotating arm 9. When the seat moves from the second position to the first position relative to the fixed base 15, the inclined surface 73 contacts the cross bar 11 and lifts the hook portion 72 so that the locking hook 7 can cross over the cross bar 11. The inclined surface 73 can provide a guiding surface for the locking hook 7 to snap back into the cross bar 11 when the seat moves from the first position to the second position.

[0059] Preferably, as Figures 4 to 8 shown, the number of the locking hooks 7 is two, and the two locking hooks 7 are arranged side by side at intervals. The rotating arm 9 is arranged between the two locking hooks 7. The two locking hooks 7 can enable the snap spring 8 and the rotating arm 9 to be installed more stably.

[0060] Preferably, as Figures 4 to 8 shown, the collision locking mechanism further includes a spring 5. One end of the spring 5 is connected to the seat, and the other end is connected to the other end of the locking hook 7 away from the hook portion 72. Specifically, a connecting portion is formed by extending the second end of the locking hook 7 and is connected with a spring 5. The orientation of the connecting portion is the same as that of the hook portion. A spring bracket 14 is fixed on the seat. One end of the spring 5 is connected to the spring bracket 14, and the other end is connected to the connecting portion. The spring 5 is located on the side away from the hook portion 72 and below the locking hook 7.

[0061] Preferably, as Figures 4 to 8 shown, the spring 5 is arranged to apply a pulling force to the locking hook 7 so that the locking hook 7 can reset after crossing over the cross bar 11. The spring 5 can keep the locking hook 7 in a relatively horizontal state and assist in driving the locking hook 7 to cross over the cross bar 11 when the seat moves from the first position to the second position.

[0062] Preferably, as Figures 4 to 8 shown, the two locking hooks 7 are rotatably mounted on the seat through a first rotating shaft 6. A sleeve 12 is sleeved on the first rotating shaft 6 and located between the two locking hooks 7. The sleeve 12 separates the two locking hooks 7, so that there is a space for the rotating arm 9 to rotate between the two locking hooks 7. A rear connecting bracket for mounting the locking hook 7 is fixed on the seat. An opening for the first rotating shaft 6 to pass through is formed on the rear connecting bracket. The first rotating shaft 6 passes through the opening and is fixed to a slider 17. The slider 17 is slidably mounted in a chute 13 of the fixed base 15. The length direction of the chute 13 is along the front-rear direction of the vehicle. The front connecting bracket 1 and the seat side plate 2 rotate relative to each other during the folding, lifting or lowering movement, and the rear connecting bracket 4 slides in the chute 13 through the slider 17.

[0063] Preferably, as Figures 4 to 8 shown, the rotating arm 9 is rotatably mounted on the locking hook 7 through a second rotating shaft. Openings for mounting the second rotating shaft are formed on both the hook portion 72 of the locking hook 7 and the rotating arm 9.

[0064] As Figures 9 to 16 shown, in the normal state, i.e., the first state, when the motor drives the seat cushion of the seat to lift, i.e., from the first position to the second position, the seat side plate 2 drives the entire collision locking mechanism to move forward, the spring 5 is stretched, and the rotating arm 9 touches the cross bar 11. At this time, the magnitude of the acceleration does not meet the deformation requirement of the circlip 8, and the cross bar 11 pushes the entire locking hook 7 upward, so that the hooked portion 72 of the locking hook 7 crosses the cross bar 11. After the seat cushion of the seat is lifted, it meets the normal operation of folding the backrest into a horizontal working condition.

[0065] As Figures 17 to 24 shown, in the normal state, i.e., the first state, when the motor drives the seat cushion of the seat to descend, i.e., from the second position back to the first position, the seat side plate 2 drives the entire collision locking mechanism to move backward, the spring 5 is compressed, and the cross bar 11 will push the entire locking hook 7 upward, and continue to move backward until it finally returns to the designed position to complete the reset.

[0066] As Figures 25 to 32 shown, when a vehicle collision impact occurs, i.e., the second state, the seat side plate 2 drives the locking hook 7 to touch the cross bar 11 forward. The impact force meets the deformation requirement of the circlip 8, the circlip 8 deforms, the rotating arm 9 is impacted and rotates clockwise around the second rotating shaft or the rotating arm 9 will come out and break. At this time, the locking hook 7 hooks the cross bar 11, and the entire collision locking structure will not be pushed up, playing a locking role.

[0067] In the present utility model, when a collision occurs, the rotating arm is impacted by the cross bar, causing the circlip to deform and the rotating arm to disengage from the circlip, and the hooked portion of the locking hook hooks the cross bar, or the rotating arm breaks and the hooked portion of the locking hook hooks the cross bar to achieve the purpose of locking the seat. The locking effect of the present utility model is stable, solving the technical problem that in the prior art, when the seat encounters a great acceleration, it moves wrongly due to inertia, and can reduce the harm caused by the acceleration impact to the human body.

[0068] Parts not involved in the present utility model are the same as or can be implemented by using the prior art. The above description is only a preferred embodiment of the present utility model, and does not make any form of limitation to the present utility model. Although the present utility model has been disclosed above with the preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art, without departing from the technical solution of the present utility model, can make some changes or modifications to the above-disclosed technical content to be equivalent embodiments of equivalent changes. However, as long as it does not depart from the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A seat with a collision locking mechanism, comprising a fixed base, wherein the seat can move between a first position and a second position relative to the fixed base, characterized in that: The collision locking mechanism is arranged between the seat and the fixed base, and comprises a cross bar (11) for fixing on the fixed base, a lock hook (7) for being rotatably mounted on the seat, and a rotating arm (9) rotatably connected to the lock hook (7), wherein the rotating arm (9) is arranged to be rotatable between a first state and a second state; when the rotating arm (9) is in the first state, the rotating arm (9) guides the lock hook (7) to pass over the cross bar (11) to allow the seat to move from a first position to a second position relative to the fixed base; when the rotating arm (9) is in the second state, the lock hook (7) is hung on the cross bar (11) to limit the seat from moving from a first position to a second position relative to the fixed base.

2. The seat with a collision locking mechanism according to claim 1, characterized in that: A hook portion (72) for hanging on the cross bar (11) is formed at one end of the lock hook (7), and the rotating arm (9) is rotatably connected to the hook portion (72). When in a first state, the rotating arm (9) is tilted toward the cross bar (11) so as to lift the hook portion (72) after contacting the cross bar (11).

3. The seat with a collision locking mechanism according to claim 2, characterized in that: The collision locking mechanism also includes a retaining spring (8); a through hole (71) is provided on the lock hook (7) for the retaining spring (8) to pass through; a retaining groove (91) is provided at one end of the rotating arm (9) away from the bent hook portion (72); when in a first state, the retaining groove (91) of the rotating arm (9) is engaged with the retaining spring (8) so that the rotating arm (9) is tilted toward the cross bar (11).

4. The seat with a collision locking mechanism according to claim 3, characterized in that: When in the second state, the locking groove (91) of the rotating arm (9) is disengaged from the retaining spring (8), so that the locking hook (7) is hung on the cross bar (11).

5. The seat with a collision locking mechanism according to claim 2, characterized in that: The hook portion (72) has an inclined surface (73) in the opposite direction to the inclination direction of the rotating arm (9); when the seat moves from the second position to the first position relative to the fixed base, the inclined surface (73) contacts the cross bar (11) and lifts the hook portion (72) so that the locking hook (7) passes over the cross bar (11).

6. The seat with a collision locking mechanism according to claim 2, characterized in that: There are two locking hooks (7), which are arranged side by side and spaced apart from each other, and the rotating arm (9) is arranged between the two locking hooks (7).

7. The seat with a collision locking mechanism according to claim 2, characterized in that: The collision locking mechanism also includes a spring (5), one end of which is connected to the seat, and the other end of which is connected to the other end of the lock hook (7) away from the bent hook portion (72).

8. The seat with a collision locking mechanism according to claim 7, characterized in that: The spring (5) is configured to apply a pulling force to the locking hook (7) so that the locking hook (7) is reset after passing over the cross bar (11).

9. The seat with a collision locking mechanism according to claim 1, characterized in that: The two locking hooks (7) are rotatably mounted on the seat via a first rotating shaft (6); a sleeve (12) is sleeved on the first rotating shaft (6) and located between the two locking hooks (7).

10. The seat with a collision locking mechanism according to claim 1, characterized in that: The rotating arm (9) is rotatably mounted on the locking hook (7) via a second rotating shaft.

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