Large armrest locking hinge for rear seats in vehicles

Abstract

The present invention discloses a locking hinge for a large armrest of a rear seat of a car, comprising a fixed axis component and a movable bracket rotatably sleeved with the fixed axis component, the fixed axis component is provided with a folding limit portion and a use support portion protruding outward, the movable bracket is provided with a positioning shaft, the positioning shaft limits the rotation stroke of the movable bracket between the folding limit portion and the use support portion; a main locking block is rotatably mounted on the movable bracket, a first elastic element is assembled between the main locking block and the movable bracket, when the positioning shaft moves to the inner side position of the folding limit portion, the first elastic element causes the main locking block to apply a thrust to the folding limit portion, so as to force the positioning shaft to keep close contact with the folding limit portion. The beneficial effect of the present invention is that the large armrest can be locked on the backrest of the rear row in a zero-shaking clearance manner.

Description

Technical Field

[0001] The invention relates to an automobile armrest component, in particular to a large armrest locking hinge for a rear seat of an automobile. Background Art

[0002] Some models have an armrest in the middle of the rear seat, i.e., a large armrest. In addition to the hand support function, the large armrest of the rear seat is also integrated with cup holders, control panels and other components on some high-end models. Therefore, the assembly accuracy of the large armrest in the rear seat should have more stringent requirements.

[0003] However, in the prior art, the locking of the large armrest in the folded state is achieved with the help of a limit pin. In order to ensure that the limit pin can be locked into the corresponding hole, there should be a clearance fit between the limit pin and the hole. Due to the influence of manufacturing precision and assembly precision, the limit pin will have a certain amount of swing. Although the swing gap is small, when it is reflected to the far end of the large armrest, the swing will be significantly magnified, which seriously reduces the installation quality of the armrest and affects the riding experience of the rear passengers. Summary of the invention

[0004] In view of this, the present invention provides a locking hinge for a large armrest of a rear seat of an automobile, which can lock the large armrest on a rear seat backrest in a manner of zero swing clearance.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A locking hinge for a large armrest of a rear seat of an automobile, the key of which is that it comprises a fixed axis component and a movable bracket rotatably sleeved with the fixed axis component, the fixed axis component is provided with a folding limit portion and a use support portion protruding outward, the movable bracket is provided with a positioning shaft, the positioning shaft limits the rotational stroke of the movable bracket between the folding limit portion and the use support portion; a main locking block is rotatably mounted on the movable bracket, a first elastic element is assembled between the main locking block and the movable bracket, when the positioning shaft moves to the inner position of the folding limit portion, the first elastic element causes the main locking block to apply a thrust to the folding limit portion to force the positioning shaft to remain in close contact with the folding limit portion.

[0007] With the above structure, the fixed axis component is fixedly mounted on the support inside the seat back, and the movable bracket is fixedly assembled on the side of the large armrest frame. The rotation of the large armrest frame can drive the movable bracket to rotate around the fixed axis component, thereby realizing the opening and folding of the large armrest. When the positioning shaft rotates to the position of the folding limit part, it is the folding position of the large armrest. At this time, the first elastic element drives the main locking block to apply thrust to the folding limit part, and then the folding limit part forms a reverse thrust on the main locking block. The reverse thrust makes the movable bracket have a tendency to move in the folding direction of the large armrest frame, so that the positioning shaft and the folding limit part are kept in close contact, that is, zero gap installation is achieved in the folded state, ensuring that the large armrest will not shake at all, which helps to improve the comfort experience of rear passengers.

[0008] Preferably, a secondary locking block is rotatably mounted on the movable bracket, and a second elastic element is installed between the secondary locking block and the movable bracket. When the positioning shaft moves to the inner position of the folding limit portion, the second elastic element causes the secondary locking block to apply a thrust to the folding limit portion to force the positioning shaft to keep in close contact with the folding limit portion. The above structure can play a double insurance role. For example, when the main locking block fails or bounces up due to severe bumps, the secondary locking block can still keep the positioning shaft and the folding limit portion in close contact.

[0009] Preferably, the folding limit portion has a first opposite side and a second opposite side away from the inner side thereof, and in the hinge locked state, the main locking block and the secondary locking block respectively abut against the first opposite side and the second opposite side. With the above structure, in the locked state, the main locking block and the secondary locking block act on different surfaces of the folding limit portion, which can further ensure the reliability of locking.

[0010] Preferably, the inner side of the folding limit portion is an inner concave curved surface, and the first opposite side and the second opposite side are outer convex curved surfaces. With the above structure, the abutment between the components can be constrained to be linear contact, which helps to further ensure the reliability of locking.

[0011] Preferably, the main locking block and the auxiliary locking block are installed in parallel, a synchronization shaft is fixedly provided on the upper part of the auxiliary locking block, and the synchronization shaft part is located above the main locking block. In the locked state, there is a gap between the synchronization shaft and the main locking block. The setting of the gap can ensure that the main locking block and the auxiliary locking block do not affect each other in the locked state.

[0012] Preferably, the movable bracket includes two sets of bracket pieces arranged in parallel, a support shaft is connected between the ends of the two sets of bracket pieces, and the main locking block and the auxiliary locking block are both rotatably mounted on the support shaft. The first elastic element is a torsion spring, the middle part of which is mounted on the support shaft, and the two ends are respectively supported by the bracket piece and the main locking block. The above structure can realize modular design of the hinge, which is conducive to ensuring the assembly accuracy of the large handrail.

[0013] Preferably, the main locking block is provided with a cable connection hole at one end away from the support shaft. With the above structure, the cable is fixed to the cable connection hole, and pulling the cable can sequentially drive the main locking block and the auxiliary locking block to leave the folding limit portion, thereby completing the unlocking operation.

[0014] Preferably, the fixed axis component includes a cylindrical portion and a square axis integrally formed on one side of the cylindrical portion, the folding limit portion and the use support portion are formed on the circumferential outside of the cylindrical portion, the cylindrical portion is symmetrically provided with support truncated tables on both sides of the axial direction, and the two groups of bracket pieces are provided with mounting holes that are rotatably sleeved with the support truncated tables. With the above structure, the two groups of bracket pieces are symmetrically rotatably mounted on both sides of the cylindrical portion, which can ensure the reliability of the rotational assembly of the movable bracket and the smoothness of operation.

[0015] As a preference: the lower parts of the main locking block and the auxiliary locking block are provided with guide surfaces. With the above structure, during the folding process of the large armrest, the guide surfaces can enable the main locking block and the auxiliary locking block to smoothly pass over the folding limit portion.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The large armrest can be locked on the rear seat backrest with zero shaking clearance, ensuring that the large armrest will not shake when folded, which helps to improve the riding comfort experience of rear passengers and is suitable for mid-to-high-end models.

[0018] 2. The main lock block and the auxiliary lock block are used for double insurance, which has the technical advantages of good reliability and high locking strength.

[0019] 3. By adjusting the rotation angle between the folding limit part and the support part, it can be applied to armrests with different opening angles, with good versatility.

[0020] 4. The design of each component and its assembly relationship is reasonable, and the hinge can realize modular and serialized production and manufacturing. It can be applied to large armrests of different styles and different models, and has broad market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the installation of locking hinges on large handrails;

[0022] Figure 2 It is a partial exploded schematic diagram of the locking hinge position of the large armrest;

[0023] Figure 3 is a structural schematic diagram of a locking hinge;

[0024] Figure 4 It is a schematic diagram of the exploded structure of the locking hinge;

[0025] Figure 5is a cross-sectional view of the locking hinge (folded state);

[0026] Figure 6 This is a cross-sectional view of the locking hinge (in the expanded state). DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with embodiments and drawings.

[0028] In this embodiment, the locking hinge A is applied to Figure 1 The large armrest shown in the figure is taken as an example for detailed description.

[0029] Please refer to Figure 1 and Figure 2 As shown, a rear seat armrest mounting structure involves the following components: support 7, locking hinge A, armrest frame 8, unlocking component 9, and cable 10. The support 7 is used to be fixedly connected to the frame of the seat, and there are two groups in total, which are located on both sides of the inner end of the armrest frame 8. The locking hinge A can not only make the armrest frame 8 rotate and assemble on the support 7, but also ensure that the armrest is locked on the backrest in the folded state.

[0030] For example Figure 3 , 4 As shown in Figure 5, in this embodiment, the locking hinge A includes a fixed axis component 1 and a movable bracket 2 rotatably connected to the fixed axis component 1, wherein the fixed axis component 1 is fixedly assembled on the support 7, and the fixed axis component 1 has a folding limit portion 1a and a use support portion 1b protruding outward, and the movable bracket 2 is fixedly assembled on the inner end side wall of the large armrest frame 8. The movable bracket 2 is provided with a positioning shaft 2a, which limits the rotation stroke of the movable bracket 2 between the folding limit portion 1a and the use support portion 1b. When the positioning shaft 2a is rotated to the position of the folding limit portion 1a, the large armrest is in a folded state, and when the positioning shaft 2a is rotated to the position of the use support portion 1b, the large armrest is in an unfolded state.

[0031] Furthermore, the movable bracket 2 includes two groups of bracket plates 2b arranged in parallel, and a support shaft 2c is connected between the ends of the two groups of bracket plates 2b. The locking hinge A also includes a main locking block 3 and a secondary locking block 5, both of which are rotatably mounted on the support shaft 2c, wherein a first elastic element 4 is installed between the main locking block 3 and the movable bracket 2. When the positioning shaft 2a moves to the inner side a position of the folding limit part 1a, the first elastic element 4 drives the main locking block 3 to apply a thrust to the folding limit part 1a. Since the folding limit part 1a is fixed on the support 7, the folding limit part 1a will form a reverse thrust on the main locking block 3. The reverse thrust makes the movable bracket 2 have a tendency to move in the folding direction of the large armrest frame 8, thereby making the positioning shaft 2a and the folding limit part 1a remain continuously in close contact.

[0032] A second elastic element 6 is installed between the secondary locking block 5 and the movable bracket 2. When the positioning shaft 2a moves to the inner side a position of the folding limit part 1a, the second elastic element 6 drives the secondary locking block 5 to apply a thrust to the folding limit part 1a. Since the folding limit part 1a is fixed on the support 7, the folding limit part 1a will form a reverse thrust on the secondary locking block 5. The reverse thrust makes the movable bracket 2 tend to move in the folding direction of the large armrest frame 8, so that the positioning shaft 2a and the folding limit part 1a remain in continuous close contact.

[0033] In the locking hinge A, only one of the main locking block 3 and the secondary locking block 5 can be set, or they can be set at the same time. Setting the main locking block 3 and the secondary locking block 5 at the same time can play a double insurance role. For example, when the main locking block 3 fails or bounces up due to severe bumps, the secondary locking block 5 can still keep the positioning shaft 2a and the folding limit part 1a in close contact, thereby ensuring that the locking position of the large armrest is zero gap, ensuring that there will be no shaking after the large armrest is folded, which helps to improve the comfort experience of the rear passengers.

[0034] For example Figure 1 As shown, in order to ensure the locking reliability and strength, locking hinges A are installed between the two sides of the inner end of the large armrest frame 8 and the two groups of supports 7.

[0035] For example Figure 1 , 3 As shown in Figure 4, in this embodiment, the unlocking assembly 9 includes a base body 9a fixedly mounted on the large armrest frame 8, a button 9b is rotatably arranged in the base body 9a, a cable connecting hole 3a is provided at the end of the main locking block 3 away from the support shaft 2c, and a cable 10 is connected between the cable connecting hole 3a and the button 9b. When the user needs to use the large armrest, the button 9b is operated by hand, and the button 9b pulls the cable 10 to move, and then the main locking block 3 overcomes the resistance of the first elastic element 4 and moves in the direction away from the folding limit portion 1a, releasing the holding force between the positioning shaft 2a and the folding limit portion 1a, thereby completing the unlocking. After unlocking, the large armrest can be folded forward.

[0036] The main locking block 3 and the secondary locking block 5 are installed in parallel, and a synchronization shaft 5a is fixedly passed through the upper part of the secondary locking block 5. The synchronization shaft 5a is at least partially located above the main locking block 3. In the locked state, there is a gap between the synchronization shaft 5a and the main locking block 3. The setting of the gap can not only ensure that the main locking block 3 and the secondary locking block 5 do not affect each other in the locked state, but also through the button 9b to pull the cable 10, it can sequentially drive the main locking block 3 and the secondary locking block 5 to leave the folding limit part 1a, thereby completing the unlocking of the main locking block 3 and the secondary locking block 5.

[0037] like Figure 5 and 6As shown, the lower parts of the main locking block 3 and the auxiliary locking block 5 are provided with a guide surface d. During the folding process of the large armrest, the guide surface d enables the main locking block 3 and the auxiliary locking block 5 to smoothly pass over the folding limit portion 1a, and then automatically rest against the folding limit portion 1a under the elastic force of the torsion spring, thereby achieving locking.

[0038] In this embodiment, the first elastic element 4 is a torsion spring, the middle part of which is mounted on the support shaft 2c, and the two ends of which are respectively supported by the bracket plate 2b and the main locking block 3; the second elastic element 6 is also a torsion spring, the middle part of which is mounted on the support shaft 2c, and the two ends of which are respectively supported by the bracket plate 2b and the secondary locking block 5.

[0039] For example Figure 4 As shown, the fixed axis component 1 includes a cylindrical portion 1f and a square axis 1e integrally formed on one side of the cylindrical portion 1f, the square axis 1e is fixedly sleeved on the support 7, the folding limit portion 1a and the use support portion 1b are integrally formed on the circumferential outside of the cylindrical portion 1f, and support cones 1d are symmetrically provided on both sides of the axial direction of the cylindrical portion 1f, and two groups of bracket sheets 2b are provided with mounting holes 2b1 rotatably sleeved with the support cones 1d. The two groups of bracket sheets 2b are symmetrically rotationally mounted on both sides of the cylindrical portion 1f, which can ensure the reliability of the rotational assembly and the smoothness of the operation of the movable bracket 2.

[0040] For example Figure 2 , 4 As shown, the large armrest frame 8 is provided with a positioning hole 8a adapted to the end of the support shaft 2c and the support cone 1d. After the locking hinge A is assembled, the ends of the support shaft 2c and the support cone 1d both protrude from the outside of the bracket sheet 2b, and the protruding parts are embedded in the positioning hole 8a of the large armrest frame 8, and then welding is performed between the bracket sheet 2b and the large armrest frame 8, which can fully ensure the reliability of the assembly connection between the movable bracket 2 and the large armrest frame 8.

[0041] For example Figure 5 As shown, the folding limit portion 1a has a first relative side b and a second relative side c away from its inner side a. In the hinge locking state, the positioning shaft 2a abuts against the inner side a, and the main locking block 3 and the secondary locking block 5 abut against the first relative side b and the second relative side c respectively. The forces of the main locking block 3 and the secondary locking block 5 are designed to be on different surfaces of the folding limit portion 1a, which can further ensure the reliability of locking. In this embodiment, the inner side a of the folding limit portion 1a is preferably an inner concave curved surface, and the first relative side b and the second relative side c are preferably outer convex curved surfaces. Such a design can constrain the abutment between the components into linear contact, which helps to further improve the reliability of locking.

[0042] 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. A large armrest locking hinge for a rear seat of a car, characterized in that: The invention comprises a fixed axis component (1) and a movable bracket (2) rotatably sleeved with the fixed axis component (1), wherein the fixed axis component (1) is provided with a folding limit portion (1a) and a use support portion (1b) protruding outward, and the movable bracket (2) is provided with a positioning shaft (2a), wherein the positioning shaft (2a) limits the rotational travel of the movable bracket (2) between the folding limit portion (1a) and the use support portion (1b); a main locking block (3) is rotatably mounted on the movable bracket (2), and a first elastic element (4) is arranged between the main locking block (3) and the movable bracket (2), and when the positioning shaft (2a) moves to a position on the inner side (a) of the folding limit portion (1a), the first elastic element (4) causes the main locking block (3) to apply a thrust to the folding limit portion (1a), so as to force the positioning shaft (2a) to maintain close contact with the folding limit portion (1a).

2. The large armrest locking hinge for a rear seat of a vehicle according to claim 1, characterized in that: A secondary locking block (5) is rotatably mounted on the movable bracket (2), and a second elastic element (6) is installed between the secondary locking block (5) and the movable bracket (2). When the positioning shaft (2a) moves to the inner side (a) position of the folding limit portion (1a), the second elastic element (6) causes the secondary locking block (5) to apply a thrust to the folding limit portion (1a), so as to force the positioning shaft (2a) to maintain close contact with the folding limit portion (1a).

3. The large armrest locking hinge for a rear seat of a vehicle according to claim 2, characterized in that: The folding limit portion (1a) has a first relative side (b) and a second relative side (c) away from the inner side (a) thereof, and in a hinge locked state, the main locking block (3) and the secondary locking block (5) respectively abut against the first relative side (b) and the second relative side (c).

4. The large armrest locking hinge for a rear seat of a vehicle according to claim 2, characterized in that: The main locking block (3) and the auxiliary locking block (5) are installed in parallel, and a synchronizing shaft (5a) is fixedly provided on the upper part of the auxiliary locking block (5). The synchronizing shaft (5a) is partially located above the main locking block (3). In a locked state, there is a gap between the synchronizing shaft (5a) and the main locking block (3).

5. The large armrest locking hinge for a rear seat of a vehicle according to claim 2, characterized in that: The movable bracket (2) comprises two groups of bracket plates (2b) arranged in parallel, a support shaft (2c) is connected between the ends of the two groups of bracket plates (2b), and the main locking block (3) and the auxiliary locking block (5) are both rotatably sleeved on the support shaft (2c).

6. The large armrest locking hinge for a rear seat of a vehicle according to claim 5, characterized in that: The first elastic element (4) is a torsion spring, the middle portion of which is sleeved on the support shaft (2c), and the two ends of which are respectively supported by force on the bracket plate (2b) and the main locking block (3).

7. The large armrest locking hinge for a rear seat of a vehicle according to claim 5, characterized in that: A cable connection hole (3a) is provided at one end of the main locking block (3) away from the support shaft (2c).

8. The large armrest locking hinge for a rear seat of a vehicle according to claim 5, characterized in that: The fixed axis component (1) comprises a cylindrical portion (1f) and a square axis (1e) integrally formed on one side of the cylindrical portion (1f); the folding limit portion (1a) and the use support portion (1b) are formed on the circumferential outside of the cylindrical portion (1f); support truncated tables (1d) are symmetrically provided on both sides of the axial direction of the cylindrical portion (1f); and mounting holes (2b1) rotatably sleeved with the support truncated tables (1d) are provided on the two groups of bracket sheets (2b).

9. The large armrest locking hinge for a rear seat of a vehicle according to claim 2, characterized in that: The lower parts of the main locking block (3) and the auxiliary locking block (5) are both provided with a guide surface (d).

10. The large armrest locking hinge for a rear seat of a vehicle according to claim 3, characterized in that: The inner side (a) of the folding limit portion (1a) is an inner concave curved surface, and the first opposite side (b) and the second opposite side (c) are outer convex curved surfaces.

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