Seat slide unit and seat angle adjustment mechanism using same

Abstract

A seat slide unit and a seat angle adjustment mechanism using same. The seat slide unit comprises a hammer base assembly and a lock hook (2) mounted on the hammer base assembly; the hammer base assembly comprises a stamped member (3) and a plastic block (4) mounted on the inner side of the stamped member (3); the stamped member (3) comprises a connecting plate (301), and a first side plate (302) and a second side plate (303) integrally formed with the connecting plate (301); the top of the plastic block (4) is attached to the connecting plate (301) on the stamped member (3); both the first side plate (302) and the second side plate (303) are provided with a first through hole (304) for a lead screw to pass through; and the plastic block (4) wraps the first through holes (304) on the first side plate (302) and the second side plate (303) to form a lead screw hole (401) which can be threadedly connected to the lead screw. The short and flat design of the hammer base assembly not only reduces the height of the hammer base assembly, but also reduces the weight of the hammer base assembly.

Description

A sliding seat unit and a seat angle adjusting mechanism using the same

[0001] The present application is based on the application CN202421510090.4 with the application date of June 28, 2024, and claims its priority, and the disclosure of the CN application is incorporated herein in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of electric angle adjustment of rear seats of a vehicle, and in particular to a sliding seat unit and a seat angle adjusting mechanism using the same. BACKGROUND

[0003] Automobile seats are important components in the interior of a vehicle, providing comfort and safety for passengers. Currently, rear seats on the market are generally fixed and cannot be adjusted. Commonly used rear seat backrest angle adjusting devices generally use a manual method, which is inconvenient to adjust, and the deflection angle often cannot be continuously adjusted, which cannot meet the individual needs of the occupants, especially for long-distance vehicles, the riding comfort needs to be improved. In order to solve the above problems of manually adjusting the angle of the rear seat backrest, patent CN202323126270.0 discloses an electric angle adjusting mechanism for a rear seat of a vehicle. This patent can solve the problem that the rear seat backrest angle adjusting device generally uses a manual method, but the hammer seat height in the sliding seat unit in this patent is high, and the high upper surface of the hammer seat will cause compatibility risks, such as the KX11 and NDLB project space cannot be arranged, and the local gap with the vehicle body cover is less than 7.5mm when matching with existing projects, so there is a risk of installation, and compared with the existing generation of products, there is a competitive weakness on new projects. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present disclosure is to provide a sliding seat unit and a seat angle adjusting mechanism using the same, which solves the problem that the high hammer seat height in the sliding seat unit will cause compatibility risks.

[0005] To achieve the above object, one aspect of the present disclosure relates to a sliding seat unit, comprising a hammer seat assembly and a lock hook mounted on the hammer seat assembly, the hammer seat assembly comprising a stamping part and a plastic block mounted inside the stamping part, the stamping part comprising a connecting plate, a first side plate and a second side plate integrally formed with the connecting plate, the first side plate, the connecting plate and the second side plate forming a U-shaped cavity, and the plastic block being filled in the U-shaped cavity and wrapping the first side plate and the second side plate; the top of the plastic block being attached to the connecting plate on the stamping part, and the first side plate and the second side plate each being provided with a first through hole for the lead screw to pass through, and the plastic block wrapping the first through holes on the first side plate and the second side plate to form a lead screw hole for thread connection with the lead screw.

[0006] In the present disclosure, by attaching the top of the plastic block to the connecting plate on the stamping part, the hammer seat assembly can be designed to be low and flat. Thus, not only the height of the hammer seat assembly can be reduced, but also the weight of the hammer seat assembly is reduced, and the existing product can be replaced in the project, so that the market competition is more favorable.

[0007] In an embodiment of the present disclosure, the connecting plate of the stamping part is provided with a circular arc protrusion with an inner radius R corresponding to the lead screw hole, and the thread major diameter of the lead screw hole is M. Thus, in addition to the design that the top of the plastic block is attached to the connecting plate on the stamping part, by providing the circular arc protrusion on the connecting plate of the stamping part corresponding to the lead screw hole, the purpose of designing the hammer seat assembly to be low and flat can also be achieved. In addition, this design scheme with the circular arc protrusion has a lower requirement for the injection molding of the plastic block than the scheme without the circular arc protrusion, so that the manufacturing cost and manufacturing difficulty can be controlled under the premise of meeting the low and flat design requirement. In addition, the first through hole in this technical scheme not only can be used for the lead screw to pass through, but also can play a process avoiding role, facilitating the stamping forming of the circular arc protrusion with the inner radius R.

[0008] In an embodiment of the present disclosure, the vertical distance between the center of the lead screw hole and the plane of the connecting plate outside the circular arc protrusion is substantially equal to half of the thread major diameter M of the lead screw hole. Thus, an advantageous relative arrangement structure of the lead screw hole relative to the plane of the connecting plate outside the circular arc protrusion can be obtained, and an advantageous structure of the circular arc protrusion is further obtained.

[0009] In an embodiment of the present disclosure, the inner radius R of the circular arc protrusion and the thread major diameter M of the lead screw hole are selected such that R-M / 2≤4.5mm. Thus, an advantageous size relationship of the inner radius R of the circular arc protrusion and the thread major diameter M of the lead screw hole can be obtained.

[0010] In an embodiment of the present disclosure, the first side plate and the second side plate are further provided with a second through hole for the guide rod to pass through, and the plastic block wraps the second through hole on the first side plate and the second side plate to form a guide rod hole in sliding connection with the guide rod, and the two ends of the guide rod hole are provided with annular protrusions for buffering impact contact. The annular protrusions in the technical solution can serve as impact stops and buffer contact between the front and rear metal supports, thereby avoiding abnormal noise.

[0011] In an embodiment of the present disclosure, the first side plate and the second side plate are further provided with a plurality of third through holes, and the third through holes form a plurality of cylindrical ribs after being wrapped with plastic to connect the first side plate and the second side plate with the plastic block.

[0012] In an embodiment of the present disclosure, the two ends of the lock hook are provided with a press-in formed feature and a waist-shaped limiting feature sleeved on the press-in formed feature, the connecting plate is provided with a fourth through hole corresponding to the press-in formed feature, and the plastic block is provided with a mounting hole corresponding to the press-in formed feature. The fourth through hole in the technical solution is used for the press-in formed feature to pass through, and the mounting hole is used for wrapping the press-in formed feature, thereby achieving the purpose of firmly mounting the lock hook on the hammer seat assembly.

[0013] In an embodiment of the present disclosure, the height of the press-in formed feature is less than the height of the circular arc protrusion. Thus, the advantageous height relative relationship of the press-in formed feature relative to the circular arc protrusion can be achieved.

[0014] In an embodiment of the present disclosure, the distance between the waist-shaped limiting feature and the first through hole is L3, and L3≥3mm. In the present disclosure, through the specific setting of the distance between the waist-shaped limiting feature on the lock hook and the first through hole, not only the injection molding requirement can be reduced, but also the industrial aesthetic design can be met.

[0015] In an embodiment of the present disclosure, the gap distance between the waist-shaped long side of the waist-shaped limiting feature and the outside round corner of the circular arc protrusion is L2, and L2>0. Thus, the waist-shaped limiting feature can be prevented from interfering with the circular arc protrusion.

[0016] In an embodiment of the present disclosure, the distance between the center of the lock hook and the center of the screw rod hole is L1, and L1≤18mm. Through the specific setting of the distance between the lock hook and the screw rod hole, not only the injection molding requirement can be reduced, but also the industrial aesthetic design can be met.

[0017] Another aspect of the present disclosure relates to a seat angle adjustment mechanism employing the sliding seat unit, characterized in that it comprises a support unit, a lead screw unit and a guide rod unit mounted on the support unit, a driving unit for driving the lead screw unit, and a damping unit mounted in the support unit below the sliding seat unit, the lead screw hole on the sliding seat unit being threadedly connected with the lead screw unit, and the guide rod hole on the sliding seat unit being slidingly connected with the guide rod unit. BRIEF DESCRIPTION OF DRAWINGS

[0018] FIG. 1 is a front perspective view of a sliding seat unit in a first embodiment of the present disclosure;

[0019] FIG. 2 is a bottom perspective view of the sliding seat unit in the first embodiment of the present disclosure;

[0020] FIG. 3 is a front sectional view of the sliding seat unit in the first embodiment of the present disclosure;

[0021] FIG. 4 is a perspective view of a locking hook in the sliding seat unit in the first embodiment of the present disclosure;

[0022] FIG. 5 is a perspective view of a punch in the sliding seat unit in the first embodiment of the present disclosure;

[0023] FIG. 6 is a bottom perspective view of a plastic block in the sliding seat unit in the first embodiment of the present disclosure;

[0024] FIG. 7 is a top perspective view of the plastic block in the sliding seat unit in the first embodiment of the present disclosure;

[0025] FIG. 8 is a side sectional view of a hammer seat assembly in the sliding seat unit in the first embodiment of the present disclosure;

[0026] FIG. 9 is a bottom sectional view of the locking hook and the punch in the sliding seat unit in the first embodiment of the present disclosure;

[0027] FIG. 10 is a front perspective view of a sliding seat unit in a second embodiment of the present disclosure;

[0028] FIG. 11 is a bottom perspective view of the sliding seat unit in the second embodiment of the present disclosure;

[0029] FIG. 12 is a front sectional view of the sliding seat unit in the second embodiment of the present disclosure;

[0030] FIG. 13 is a perspective view of a locking hook in the sliding seat unit in the second embodiment of the present disclosure;

[0031] FIG. 14 is a perspective view of a punch in the sliding seat unit in the second embodiment of the present disclosure;

[0032] FIG. 15 is a bottom perspective view of a plastic block in the sliding seat unit in the second embodiment of the present disclosure;

[0033] Fig. 16 is a top perspective view of a plastic block in a slide unit in a second embodiment of the present disclosure;

[0034] Fig. 17 is a side sectional view of a hammer seat assembly in a slide unit in the second embodiment of the present disclosure;

[0035] Fig. 18 is a bottom sectional view of a locking hook and a stamping in a slide unit in the second embodiment of the present disclosure;

[0036] Fig. 19 is an overall perspective view of a seat angle adjustment mechanism in a third embodiment of the present disclosure;

[0037] Fig. 20 is a split perspective view of the seat angle adjustment mechanism in the third embodiment of the present disclosure.

[0038] Element No. Explanation 1. Slide unit; 2. Locking hook; 201. Press-in formed feature; 202. Waist-shaped limiting feature; 3. Stamping; 301. Connecting plate; 302. First side plate; 303. Second side plate; 304. First through hole; 305. Second through hole; 306. Third through hole; 307. Fourth through hole; 308. Circular arc protrusion; 4. Plastic block; 401. Screw hole; 402. Guide rod hole; 403. Annular protrusion; 404. Mounting hole; 5. Support unit; 6. Screw unit; 7. Guide rod unit; 8. Driving unit; 9. Damping unit. DETAILED DESCRIPTION

[0039] The embodiments of the present disclosure will be described in detail by the following specific examples, and other advantages and effects of the present disclosure can be easily understood by those skilled in the art from the contents disclosed in the specification. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0040] Referring to FIGS. 1-9, the first embodiment of the present disclosure provides a sliding seat unit, which comprises a hammer seat assembly and a lock hook 2 mounted on the hammer seat assembly, the hammer seat assembly comprises a stamping part 3 and a plastic block 4 mounted inside the stamping part 3, wherein the lock hook 2 is riveted with the stamping part 3 and the plastic block 4 is integrally formed by injection molding process, the stamping part 3 comprises a connecting plate 301, a first side plate 302 and a second side plate 303 integrally formed with the connecting plate 301, the first side plate 302, the connecting plate 301 and the second side plate 303 constitute a U-shaped cavity, the plastic block 4 is filled in the U-shaped cavity and wraps the first side plate 302 and the second side plate 303, the top of the plastic block 4 is attached to the connecting plate 301 on the stamping part 3, and the first side plate 302 and the second side plate 303 are each provided with a first through hole 304 for the lead screw to pass through, wherein the first through hole 304 not only allows the lead screw to pass through, but also plays a process avoiding role, facilitating the stamping forming of the circular arc protrusion 308 with an inner radius of R, and the plastic block 4 wraps the first through hole 304 on the first side plate 302 and the second side plate 303 to form a lead screw hole 401 threadedly connected with the lead screw, and the connecting plate 301 of the stamping part 3 is provided with a circular arc protrusion 308 with an inner radius of R corresponding to the lead screw hole 401, and the thread major diameter of the lead screw hole 401 is M, wherein R-M / 2≤4.5mm, and the setting of the circular arc protrusion 308 can reduce the height of the hammer seat, thereby improving the adaptability of the sliding seat unit. In addition, in the present disclosure, the vertical distance between the lead screw hole 401 and the plane of the connecting plate 301 outside the circular arc protrusion is substantially equal to half of the thread major diameter M of the lead screw hole 401. In the present disclosure, "substantially" means that the above-mentioned vertical distance is approximately equal to half of the thread major diameter M of the lead screw hole, and the deviation between the two is less than 20%.

[0041] The first side plate 302 and the second side plate 303 are also each provided with a second through hole 305 for the guide rod to pass through, the plastic block 4 wraps the second through hole 305 on the first side plate 302 and the second side plate 303 to form a guide rod hole 402 in sliding connection with the guide rod, and the two ends of the guide rod hole 402 are each provided with an annular protrusion 403 for buffering impact contact, wherein the material of the annular protrusion 403 is plastic, the annular protrusion 403 can play a role as an impact stop point and buffering contact between front and rear metal supports, thereby avoiding abnormal noise, and the first side plate 302 and the second side plate 303 are also each provided with a plurality of third through holes 306, which form a plurality of cylindrical ribs after being wrapped to connect the first side plate 302 and the second side plate 303 with the plastic block 4.

[0042] Two ends of the locking hook 2 are provided with a rivet forming feature 201 and a waist-shaped limiting feature 202 sleeved on the rivet forming feature 201, the connecting plate 301 is provided with a fourth through hole 307 corresponding to the rivet forming feature 201, and the plastic block 4 is provided with a mounting hole 404 corresponding to the rivet forming feature 201, wherein the locking hook 2 is connected with the stamping part 3 and the plastic block 4 by passing through the fourth through hole 307 through the waist-shaped limiting feature 202 and the rivet forming feature 201, and the height of the rivet forming feature 201 is less than the height of the circular arc protrusion 308, further, the fourth through hole 307 is used for the rivet forming feature 201 to pass through, and the rivet forming feature 201 is wrapped by the mounting hole 404 on the plastic block 4, so as to meet the industrial aesthetic design, and the purpose of firmly installing the locking hook 2 on the hammer seat assembly can be achieved. The distance between the center of the locking hook 2 and the center of the lead screw hole 401 is L1, wherein L1≤18mm. The gap distance between the waist-shaped long side of the waist-shaped limiting feature 202 and the outside corner of the circular arc protrusion 308 is L2, wherein L2>0. The distance between the waist-shaped limiting feature 202 and the first through hole 304 is L3, wherein L3≥3mm.

[0043] Please refer to FIGS. 10-18, the second embodiment of the present disclosure also provides a sliding seat unit, which is similar to the structure of the sliding seat unit in the first embodiment, except that the connecting plate 301 of the stamping part 3 on the sliding seat unit 1 is not provided with a circular arc protrusion 308 with an inner radius R corresponding to the lead screw hole 401, but the top of the plastic block 4 is still attached to the connecting plate 301 of the stamping part 3, so that the hammer seat assembly in this sliding seat unit is also designed to be low and flat, thereby reducing the overall height of the hammer seat assembly and ensuring the adaptability of the sliding seat unit. Therefore, the common point of the two embodiments in the present disclosure is that the top of the plastic block 4 is attached to the connecting plate 301 of the stamping part 3. The difference is that in the first embodiment, the connecting plate 301 of the stamping part 3 is further provided with a circular arc protrusion 308 corresponding to the lead screw hole 401.

[0044] Referring to FIG. 19 and FIG. 20, the third embodiment of the present disclosure provides a seat angle adjustment mechanism employing the sliding seat unit, which comprises a support unit 5, a lead screw unit 6 and a guide rod unit 7 mounted on the support unit 5, a driving unit 8 for driving the lead screw unit 6, and a damping unit 9 mounted in the support unit 5 and located below the sliding seat unit 1, the lead screw hole 401 on the sliding seat unit 1 is threadedly connected with the lead screw unit 6, and the guide rod hole 402 on the sliding seat unit 1 is slidingly connected with the guide rod unit 7, wherein the driving unit 8 provides power input for driving the lead screw unit 6 to rotate, the lead screw unit 6 cooperates with the sliding seat unit 1 to convert the rotary motion of the lead screw into the linear motion of the sliding seat unit 1 and push the sliding seat unit 1 to extend and retract forward and backward, the other end of the sliding seat unit 1 is connected with the backrest lock on the rear seat, so that the seat can be adjusted in angle; the guide rod unit 7 cooperates with the sliding seat unit 1 to provide guidance to the sliding seat unit 1 and resist its lateral shaking, and the damping unit 9 provides friction to the hammer seat assembly for resisting the shaking along the axial direction of the lead screw.

[0045] In summary, the present disclosure can achieve the low and flat design of the hammer seat assembly by bonding the top of the plastic block 4 with the connecting plate 301 on the stamping part 3, which not only reduces the height of the hammer seat assembly, but also reduces the weight of the hammer seat assembly, so that the existing product can be replaced in the project, and the market competition is more optimal. In addition, in an embodiment, a circular arc protrusion 308 with an inner radius of R is also provided on the connecting plate 301 of the stamping part 3 corresponding to the lead screw hole 401, so that the purpose of low and flat design of the hammer seat assembly can also be achieved. The design scheme with the circular arc protrusion has lower injection molding requirements for the plastic block than the scheme without the circular arc protrusion, so that the manufacturing cost and manufacturing difficulty can be controlled under the premise of meeting the low and flat design requirements. In addition, the annular protrusion 403 in the present disclosure can serve as a collision stop point and a buffer contact between the front and rear metal supports, so that abnormal noise can be avoided. In addition, the present disclosure also specifically sets the distance between the lock hook 2 or the waist-shaped limiting feature 202 on the lock hook 2 and the first through hole 304 or the lead screw hole 401, which not only reduces the injection molding requirements, but also meets the industrial aesthetic design, so as to facilitate popularization and use.

[0046] The above embodiments only exemplarily illustrate the principles and effects of the present disclosure, but are not used to limit the present disclosure. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical thought disclosed by the present disclosure should still be covered by the claims of the present disclosure.

Claims

1. A slide unit comprising a hammer seat assembly and a lock hook (2) mounted on the hammer seat assembly, the hammer seat assembly comprising a stamping part (3) and a plastic block (4) mounted inside the stamping part (3), the stamping part (3) comprising a connecting plate (301), a first side plate (302) and a second side plate (303) integrally formed with the connecting plate (301), the first side plate (302), the connecting plate (301) and the second side plate (303) forming a U-shaped cavity, and the plastic block (4) being filled in the U-shaped cavity and wrapping the first side plate (302) and the second side plate (303). characterized in that A top of the plastic block (4) is attached to the connecting plate (301) of the stamping part (3), and each of the first side plate (302) and the second side plate (303) is provided with a first through hole (304) for a lead screw to pass through, and the plastic block (4) wraps the first through holes (304) of the first side plate (302) and the second side plate (303) to form a lead screw hole (401) threadedly connected with the lead screw.

2. The slide unit of claim 1, wherein: The connecting plate (301) of the stamping part (3) is provided with a circular arc protrusion (308) with an inner radius R corresponding to the lead screw hole (401), and a major diameter of a thread of the lead screw hole (401) is M.

3. The seat unit according to claim 2, characterized in that: A vertical distance between a center of the lead screw hole (401) and a plane of the connecting plate (301) outside the circular arc protrusion is substantially equal to half of the major diameter M of the thread of the lead screw hole (401).

4. The seat unit of claim 2, wherein: The inner radius R of the circular arc protrusion (308) and the major diameter M of the thread of the lead screw hole (401) are selected such that R-M / 2≤4.5mm.

5. The seat unit of claim 1, wherein: Each of the first side plate (302) and the second side plate (303) is further provided with a second through hole (305) for a guide rod to pass through, and the plastic block (4) wraps the second through holes (305) of the first side plate (302) and the second side plate (303) to form a guide rod hole (402) slidably connected with the guide rod, and each end of the guide rod hole (402) is provided with an annular protrusion (403) for buffering impact contact.

6. The seat unit of claim 1, wherein: Each of the first side plate (302) and the second side plate (303) is further provided with a plurality of third through holes (306), and the third through holes (306) form a plurality of cylindrical ribs after being wrapped to connect the first side plate (302) and the second side plate (303) with the plastic block (4).

7. The seat unit of claim 1, wherein: Both ends of the lock hook (2) are provided with a press-informed feature (201) and a waist-shaped limiting feature (202) sleeved on the press-informed feature (201), the connecting plate (301) is provided with a fourth through hole (307) corresponding to the press-informed feature (201), and the plastic block (4) is provided with a mounting hole (404) corresponding to the press-informed feature (201).

8. The seat unit of claim 7, wherein: A height of the press-informed feature (201) is less than a height of the circular arc protrusion (308).

9. The seat unit (1) according to claim 7, characterized in that A distance between the waist-shaped limiting feature (202) and the first through hole (304) is L3, and L3≥3mm.

10. The seat unit (1) according to claim 7, characterized in that: The connecting plate (301) of the punch (3) is provided with a circular arc protrusion (308) corresponding to the lead screw hole (401), and the gap distance between the waist-shaped long side of the waist-shaped limiting feature (202) and the outside round corner of the circular arc protrusion (308) is L2, wherein L2>0.

11. The seat unit (1) according to claim 1, characterized in that The distance between the center of the lock hook (2) and the center of the lead screw hole (401) is L1, wherein L1≤18mm.

12. A seat angle adjustment mechanism employing the slide unit according to any one of claims 1 to 11, characterized by: The slide unit (1) comprises a support unit (5), a lead screw unit (6) and a guide rod unit (7) mounted on the support unit (5), a driving unit (8) for driving the lead screw unit (6), and a damping unit (9) mounted in the support unit (5) and located below the slide unit (1), the lead screw hole (401) on the slide unit (1) is in threaded connection with the lead screw unit (6), and the guide rod hole (402) on the slide unit (1) is in sliding connection with the guide rod unit (7).

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