Anti-drop installation structure and method for flip-over armrest of automobile seat

Abstract

The present invention discloses an anti-slip installation structure and method for a reversible armrest of a car seat. The structure and method are as follows: the first end of a rotating shaft is configured to be composed of a rotating shaft portion, a step portion and a limiting portion, and an anti-slip buckle with an anti-slip buckle hole matching a limiting boss is provided, and the limiting piece is used to realize the double-sided limiting of the rotating shaft. When the car seat is impacted and the first or second armrest bracket is deformed, as long as the rotating shaft is not at a slip-out angle, the limiting effect of the limiting boss can be used to effectively prevent the first end of the rotating shaft from slipping out of the first shaft hole, thereby preventing the armrest from being loosened and causing harm to the passenger. The probability of the rotating shaft being at a slip-out angle when an accident occurs is very low, and the slip-out angle can be designed to be the angle at which the armrest is least likely to stay according to the specific car seat model. The present invention can prevent the rotating shaft of the armrest from being separated from the first or second armrest bracket during the use of the car seat, eliminate safety hazards, and ensure the safety of the reversible armrest of the car seat.

Description

Technical Field

[0001] The invention relates to a car seat, in particular to an anti-dropping installation structure and method for a flippable armrest of a car seat. Background Art

[0002] Car seats are one of the most important safety parts in cars. While providing passengers with riding comfort, they must also meet the requirements of national safety regulations to protect the safety of passengers. The seat armrests mainly provide support for the passengers' arms and improve the comfort of long-term riding.

[0003] Most of the reversible armrests on car seats currently available on the market are installed in a single-side limited position, i.e. Figure 1 As shown, a first armrest bracket 1 and a second armrest bracket 2 are arranged at intervals on the automobile seat frame, and the first armrest bracket 1 and the second armrest bracket 2 are both provided with axial holes, which are respectively recorded as the first axial hole 1a and the second axial hole 2a; a rotating shaft 4 is fixed on the armrest 3, the first end 4-1 of the rotating shaft 4 is a bare rod end, and the second end 4-2 is a threaded end, and the armrest 3 and the rotating shaft 4 are arranged in the interval space between the first armrest bracket 1 and the second armrest bracket 2; the bare rod end of the rotating shaft 4 passes through the first axial hole 1a and is rotatably installed in the first axial hole 1a, the threaded end is threadedly connected with a limiting member 5, and the limiting member 5 is located on the outer side of the second armrest bracket 2, so that the threaded end can be rotatably installed in the second axial hole 2a, so that the rotating shaft 4 is unilaterally limited in the axial direction, that is, the second end 4-2 of the rotating shaft 4 is limited in the axial direction by the limiting member 5 and cannot be separated from the second axial hole 2a, while the first end 4-1 of the rotating shaft 4 adopts a bare rod end without any limiting treatment.

[0004] The installation steps of the one-side limit installation method of the above-mentioned flip armrest of the car seat are as follows:

[0005] Step 1: pre-weld a first armrest bracket 1 and a second armrest bracket 2 which are arranged at intervals on the frame of the automobile seat, wherein the first armrest bracket 1 is close to the frame of the automobile seat, and the second armrest bracket 2 is located outside the frame of the automobile seat; and after completing the assembly of the filler and the skin of the automobile seat, the armrest 3 is installed;

[0006] Step 2: Use an armrest 3 fixed with a rotating shaft 4;

[0007] Step 3: With the rotating shaft 4 tilted, place the handrail 3 and the rotating shaft 4 in the space between the first handrail bracket 1 and the second handrail bracket 2, so that the bare end of the rotating shaft 4 passes through the first shaft hole 1a, so that the threaded end can be aligned with the second shaft hole 2a;

[0008] Step 4: place the limiter 5 on the outside of the second handrail bracket 2, and thread the limiter 5 with the threaded end of the rotating shaft 4 so that the bare rod end and the threaded end are rotatably installed in the first shaft hole 1a and the second shaft hole 2a respectively.

[0009] The above-mentioned single-sided limit installation method of the flip armrest of the car seat has the following shortcomings: when the car seat is impacted, it may cause the deformation of the car seat frame, so that the spacing distance between the first armrest bracket 1 and the second armrest bracket 2 increases, and the bare rod end of the rotating shaft 4 is not limited and can easily fall out of the first axial hole 1a of the first armrest bracket 1, resulting in damage to the installation of the armrest 3, and the metal parts fixed on the armrest 3 are exposed from the surface of the car seat, which may cause serious harm to the passengers, posing a serious safety hazard.

[0010] To solve the potential safety hazard of the above-mentioned single-side limit installation method, the general idea is to adopt a double-side limit installation method, that is: Figure 2 As shown, on the basis of the single-sided limit installation method, the first end 4-1 of the rotating shaft 4 is also changed into a threaded end, and the second limit piece 6 located on the outside of the first armrest bracket 1 is fixedly connected to the first end 4-1 to realize the axial limitation of the first end 4-1, thereby avoiding the problem that the bare rod end is easily separated from the first axial hole 1a when the car seat is impacted in the single-sided limit installation method.

[0011] However, in the prior art, the reason why most of the flip armrests of automobile seats adopt a single-sided limiting installation method, and do not limit the first end 4-1 of the rotating shaft 4 according to the double-sided limiting installation method of the above general idea, is that: the first armrest bracket 1 is close to the automobile seat frame, and after the filling and skin of the automobile seat are assembled, the interval between the first armrest bracket 1 and the automobile seat frame is very small or even non-existent. Therefore, if the above-mentioned double-sided limiting installation method is used to install the rotating shaft 4 according to the installation steps of the above-mentioned single-sided limiting installation method, in step three, because there is not enough space between the first armrest bracket 1 and the automobile seat frame, the second limiting member 6 cannot be placed between the first armrest bracket 1 and the automobile seat frame, and the fixed connection between the second limiting member 6 and the first end 4-1 cannot be achieved.

[0012] Therefore, if Figure 2 As shown, in the prior art, in order to solve the above-mentioned problem that the second limiting member 6 cannot be connected to the first end portion 4-1, the double-sided limiting installation method of the flip armrest of the automobile seat also requires that the first armrest bracket 1 and the second armrest bracket 2 be designed as one body, and the installation steps of the double-sided limiting installation method are changed as follows:

[0013] Step 1: Use a first handrail bracket 1 and a second handrail bracket 2 connected into one body through a connecting plate 7, and record them as a handrail installation frame;

[0014] Step 2: Use an armrest 3 fixed with a rotating shaft 4;

[0015] Step 3: With the rotating shaft 4 tilted, place the handrail 3 and the rotating shaft 4 in the space between the first handrail bracket 1 and the second handrail bracket 2, so that the first end 4-1 of the rotating shaft 4 passes through the first shaft hole 1a, so that the second end 4-2 can be aligned with the second shaft hole 2a;

[0016] Step 4: place the limiting member 5 on the outside of the second handrail bracket 2, and connect and fix the limiting member 5 to the second end portion 4-2;

[0017] Step 5: Place the second stopper 6 on the outside of the first handrail bracket 1, and connect and fix the second stopper 6 to the first end 4-1, so that the first end 4-1 and the second end 4-2 are rotatably connected to the first shaft hole 1a and the second shaft hole 2a respectively;

[0018] Step 6: After the filling and skin of the car seat are assembled, the first armrest bracket 1, the second armrest bracket 2, the connecting plate 7, the armrest 3, the rotating shaft 4, the stopper 5 and the second stopper 6, which have been assembled above, are installed together on the car seat. The specific method is as follows:

[0019] Step 6-1: Use a filler and a cover with a reversible armrest mechanism installation avoidance opening, so that: after the filler and the cover of the car seat are assembled, the mounting position on the car seat frame for connecting the armrest mounting frame is exposed at the reversible armrest mechanism installation avoidance opening;

[0020] Step 6-2: fix the armrest mounting frame to the mounting position of the car seat frame;

[0021] Step 6-3: Install a plastic guard plate on the car seat to cover the armrest mounting frame and the flip armrest mechanism installation avoidance opening to avoid metal parts being exposed on the surface of the car seat to create a safety hazard and maintain the beautiful appearance of the car seat.

[0022] In summary, the double-side limit installation method and installation steps of the flip armrest of the car seat have the following shortcomings:

[0023] First, due to the two reasons mentioned below, the cost of the double-sided limit installation method will increase significantly compared to the single-sided limit installation method: First, since the armrest mounting frame needs to be fixed to the car seat frame by riveting, bolting, etc., and the welding method of the single-sided limit installation method cannot be adopted, the armrest mounting frame needs to be designed to have higher strength, which will increase a lot of costs; second, the addition of the plastic guard plate, in addition to its own cost, in order to install the plastic guard plate, it is also necessary to make corresponding special designs for the car seat frame, filler and skin, which will increase more costs.

[0024] Second, compared with the single-side limit installation method, the installation steps of the double-side limit installation method are more complicated and time-consuming. Summary of the invention

[0025] The technical problem to be solved by the present invention is to provide an anti-detachment installation structure and method for a flip armrest of a car seat, so as to solve the problem that the double-sided limit installation method of the flip armrest of a car seat in the prior art has a larger cost increase, and the installation steps are more complicated and time-consuming compared to the mainstream single-sided limit installation method.

[0026] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0027] A structure for preventing a reversible armrest of a car seat from falling off is provided, comprising a first armrest bracket, a second armrest bracket, an armrest, a rotating shaft and a limiting member; the first armrest bracket and the second armrest bracket are both fixed to a car seat frame, and the first armrest bracket is closer to a middle position of the car seat than the second armrest bracket, the first armrest bracket is provided with a first shaft hole, and the second armrest bracket is provided with a second shaft hole; the armrest and the rotating shaft are fixed and are both arranged in a space between the first armrest bracket and the second armrest bracket; the first end of the rotating shaft is rotatably connected to the first shaft hole, and the second end is rotatably connected to the second shaft hole; the limiting member is located on the outer side of the second armrest bracket, and is fixedly connected to the second end of the rotating shaft;

[0028] Features:

[0029] According to the direction in which the second end portion points to the first end portion, the first end portion of the rotating shaft is composed of a rotating shaft portion, a step portion and a limiting portion which are connected in sequence, and the limiting portion has a limiting boss which protrudes relative to the step portion in the radial direction of the rotating shaft;

[0030] The anti-drop installation structure is also provided with an anti-drop buckle, and the anti-drop buckle is provided with an anti-drop buckle hole;

[0031] The anti-drop buckle is fixedly connected to the outer side of the first handrail bracket; the limiting portion passes through the first shaft hole and the anti-drop buckle hole in sequence and then extends to the outer side of the anti-drop buckle, the step portion can rotate around the axis of the rotating shaft in the anti-drop buckle hole, and the rotating shaft portion is rotatably connected to the first shaft hole;

[0032] Furthermore, the limiting boss matches the anti-dropout hole so that: when the rotating shaft rotates to a dropout angle, the limiting boss can move axially along the rotating shaft through the anti-dropout hole; when the rotating shaft rotates away from the dropout angle, the anti-dropout blocks the limiting boss from moving axially along the rotating shaft.

[0033] Thus, when the car seat is impacted and causes the first armrest bracket or the second armrest bracket to be deformed, as long as the rotating shaft is not at the disengagement angle, the limiting effect of the limiting boss can effectively prevent the first end of the rotating shaft from disengaging from the first axial hole of the first armrest bracket, thereby preventing the armrest from loosening and causing harm to the passenger. On the one hand, the probability of the rotating shaft being at the disengagement angle in the event of an accident is very low. On the other hand, the disengagement angle can be designed to be the angle at which the armrest is least likely to stay according to the specific car seat model. Therefore, the present invention can prevent the rotating shaft of the armrest from disengaging from the first armrest bracket or the second armrest bracket during the use of the car seat, eliminates safety hazards, and ensures the safety of the flippable armrest of the car seat.

[0034] As a preferred embodiment of the present invention: the anti-tripping hole of the anti-tripping buckle is provided with a rectangular hole or an elliptical hole, and the width of the rectangular hole and the short axis of the elliptical hole are both recorded as the maximum width of the anti-tripping hole, and the length of the rectangular hole and the long axis of the elliptical hole are both recorded as the maximum length of the anti-tripping hole;

[0035] The step portion and the limit portion of the rotating shaft each have two mutually parallel cross-sections, one cross-section of the step portion and the limit portion is coplanar to form a first rotating shaft cross-section, and the other cross-section of the step portion and the limit portion is coplanar to form a second rotating shaft cross-section;

[0036] The thickness between the first rotating shaft section and the second rotating shaft section is less than the maximum width, the maximum dimension of the limiting portion in the radial direction of the rotating shaft is greater than the maximum width and less than the maximum length of the anti-dropping hole, the limiting boss is located between the planes where the first rotating shaft section and the second rotating shaft section are located, and when the rotating shaft is rotated to the disengagement angle, the first rotating shaft section is parallel to the long side of the rectangular hole or the long axis of the elliptical hole, so that the limiting boss matches the anti-dropping hole;

[0037] The maximum dimension of the step portion in the radial direction of the rotating shaft is smaller than the maximum width, so that the step portion can rotate around the axis of the rotating shaft in the anti-dropping hole.

[0038] Therefore, the second embodiment utilizes the size setting to achieve the limiting and assembly and disassembly between the first end and the anti-drop buckle, which has the advantages of simple processing and convenient and smooth assembly.

[0039] As a preferred embodiment of the present invention: the anti-tripping hole of the anti-tripping is composed of a circular hole portion and a boss passing portion, and the boss passing portion protrudes from the edge of the circular hole portion;

[0040] The step portion has a circular cross section or a partial circular cross section, the diameter of which is less than the diameter of the circular hole portion, so that the step portion can rotate around the axis of the rotating shaft in the circular hole portion of the anti-drop hole;

[0041] When the rotating shaft rotates to the disengagement angle, the limiting portion is aligned with the boss passing portion, so that the limiting boss matches the anti-dropping hole.

[0042] Therefore, the third embodiment can make the step portion have a larger cross-sectional area, so as to improve the strength of the rotating shaft at the step portion and avoid deformation and damage of the rotating shaft during operation.

[0043] As a preferred embodiment of the present invention: the rotating shaft portion is rotatably installed in the first shaft hole, and a bushing is provided between the rotating shaft portion and the first shaft hole to reduce friction between the rotating shaft portion and the first shaft hole.

[0044] As a preferred embodiment of the present invention: the anti-detachment installation structure is also provided with a cover plate and a limit pin, the cover plate is fixedly connected to the inner side of the first handrail bracket, and the cover plate is provided with a cover plate arc-shaped limit groove, and the first handrail bracket is provided with a bracket arc-shaped limit groove; the limit pin is fixed to the handrail, and the limit pin passes through the cover plate arc-shaped limit groove and the bracket arc-shaped limit groove.

[0045] Therefore, the cooperation of the limit pin and the arc-shaped limit groove of the bracket can be used to limit the flipping angle of the armrest, and when the limit pin passes through the arc-shaped limit groove of the cover plate, the cover plate can be used to form resistance to the flipping of the armrest, so that the armrest can remain stable during driving.

[0046] Preferably, the bushing and the cover plate are integrally formed, and the cover plate is fixedly connected to the inner side of the first armrest bracket by means of a snap connection.

[0047] As a preferred embodiment of the present invention: a threaded hole is provided on the end face of the second end portion of the rotating shaft, and the limiting member is a bolt, which is composed of a screw portion, a shaft portion and a head portion connected in sequence; the screw portion is threadedly connected and fixed to the threaded hole, the shaft portion is rotatably installed in the second shaft hole, and the head portion is located on the outside of the second handrail bracket to play a limiting role.

[0048] As a preferred embodiment of the present invention: a rivet hole is provided on the end face of the second end of the rotating shaft, and the limiting member is a rivet; the rivet rod is riveted to the rivet hole, and the head of the rivet is located on the outside of the second handrail bracket to play a limiting role.

[0049] Preferably, the first armrest bracket and the second armrest bracket are both welded to the automobile seat frame, and the anti-drop buckle is welded to the outer side of the first armrest bracket.

[0050] A method for preventing the detachment of a reversible armrest of a car seat, characterized in that: the method for preventing the detachment is used for assembling the anti-detachment installation structure;

[0051] The anti-drop installation method comprises:

[0052] Step S1, pre-fixing a first armrest bracket and a second armrest bracket on a car seat frame, wherein the first armrest bracket is closer to a middle position of the car seat than the second armrest bracket, the first armrest bracket is provided with a first axial hole, the second armrest bracket is provided with a second axial hole, and an anti-drop buckle is fixedly connected to the outer side of the first armrest bracket, and the anti-drop buckle is provided with an anti-drop buckle hole;

[0053] Then, after the filling material and the skin of the automobile seat are assembled, the following steps S2 to S4 are performed;

[0054] Step S2, using a handrail fixed with a rotating shaft, wherein the two ends of the rotating shaft are respectively marked as a first end and a second end, and according to the direction in which the second end points to the first end, the first end of the rotating shaft is composed of a rotating shaft portion, a step portion and a limiting portion connected in sequence, and the limiting portion has a limiting boss protruding relative to the step portion in the radial direction of the rotating shaft;

[0055] Step S3, placing the handrail and the rotating shaft in the interval space between the first handrail bracket and the second handrail bracket, and installing the first end of the rotating shaft to the first shaft hole, that is, the limiting portion passes through the first shaft hole and the anti-dropping hole in sequence and then extends to the outside of the anti-dropping hole, the step portion is in the anti-dropping hole, and the rotating shaft portion is rotatably connected to the first shaft hole, wherein the step portion can rotate around the axis of the rotating shaft in the anti-dropping hole; so that: the second end of the rotating shaft is aligned with the second shaft hole;

[0056] Step S4, placing the limiting member on the outer side of the second handrail bracket, and using the limiting member to fixedly connect the second end of the rotating shaft so that the second end is rotatably connected to the second shaft hole;

[0057] Among them, the limiting boss matches the anti-dropout hole so that: when the rotating shaft rotates to the dropout angle, the limiting boss can move axially along the rotating shaft through the anti-dropout hole; when the rotating shaft rotates away from the dropout angle, the anti-dropout blocks the limiting boss from moving axially along the rotating shaft.

[0058] Therefore, the present invention is assembled in the order of step S1 to step S4. On the one hand, there is no need to use the gap between the first armrest bracket and the car seat frame during the assembly process, thereby avoiding the problem that the assembly process cannot proceed smoothly due to the gap between the first armrest bracket and the car seat frame being too small or even without a gap; on the other hand, after completing the assembly of the filler and skin of the car seat, the armrest, the rotating shaft and the limit member can be installed on the first armrest bracket and the second armrest bracket pre-fixed on the car seat frame (i.e., step S2 to step S4), thereby avoiding the existing double-sided limit installation method that requires improving the strength of the armrest installation frame, adding plastic guard plates, and making corresponding special designs for the car seat frame, filler and skin for the installation of the plastic guard plates, which greatly increases the cost and the complicated and time-consuming installation steps. Compared with the existing single-sided limit installation method, the increase in cost and assembly time is very small, which is much lower than the existing double-sided limit installation method.

[0059] In summary, the present invention has the advantages of high safety, low cost and easy installation.

[0060] Compared with the prior art, the present invention has the following beneficial effects:

[0061] First, the present invention realizes the double-sided limitation of the rotating shaft by configuring the first end of the rotating shaft to be composed of a rotating shaft portion, a step portion and a limiting portion, and arranging an anti-dropping buckle whose anti-dropping buckle hole matches the limiting boss, and cooperating with the limiting piece, so that: when the automobile seat is impacted and causes the first armrest bracket or the second armrest bracket to be deformed, as long as the rotating shaft is not at a disengagement angle, the limiting effect of the limiting boss can effectively prevent the first end of the rotating shaft from being disengaged from the first shaft hole of the first armrest bracket, thereby preventing the armrest from being loosened and causing harm to the passenger. On the one hand, the probability of the rotating shaft being at a disengagement angle in the event of an accident is very low, and on the other hand, the disengagement angle can be designed to be the angle at which the armrest is least likely to stay according to the specific automobile seat model. Therefore, the present invention can prevent the rotating shaft of the armrest from being separated from the first armrest bracket or the second armrest bracket during the use of the automobile seat, eliminates safety hazards, and ensures the safety of the flippable armrest of the automobile seat;

[0062] Second, the present invention performs assembly in the order of step S1 to step S4. On the one hand, the interval between the first armrest bracket and the automobile seat frame does not need to be used during the assembly process, thereby avoiding the problem that the assembly process cannot proceed smoothly due to the interval between the first armrest bracket and the automobile seat frame being too small or even without interval; on the other hand, after completing the assembly of the filler and the skin of the automobile seat, the armrest, the rotating shaft and the limiter can be installed on the first armrest bracket and the second armrest bracket pre-fixed on the automobile seat frame (i.e., step S2 to step S4), thereby avoiding the existing double-sided limit installation method, which requires improving the strength of the armrest installation frame, adding a plastic guard plate, and making corresponding special designs for the automobile seat frame, filler and skin for the installation of the plastic guard plate, which greatly increases the cost and the complicated and time-consuming installation steps. Compared with the existing single-sided limit installation method, the increase in cost and assembly time is very small, which is much lower than the existing double-sided limit installation method;

[0063] In summary, the present invention has the advantages of high safety, low cost and easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0065] Figure 1 It is a structural schematic diagram of a single-side limit installation of a flip-up armrest of a car seat in the prior art;

[0066] Figure 2 It is a structural schematic diagram of the double-side limit installation of the flip armrest of the car seat in the prior art;

[0067] Figure 3 It is a schematic cross-sectional view of the anti-detachment installation structure of the flip armrest of a car seat according to the present invention;

[0068] Figure 4 It is an assembly diagram of the first handrail bracket 1, the rotating shaft 4, the anti-drop buckle 8, the bushing 9 and the cover plate 10 in the present invention;

[0069] Figure 5 It is a schematic diagram of the explosion structure of the first handrail bracket 1, the rotating shaft 4, the anti-drop buckle 8, the bushing 9 and the cover plate 10 in the present invention;

[0070] Figure 6 It is a schematic diagram of the planar structure of the anti-tripping buckle 8 with a rectangular hole 8a1 in the present invention;

[0071] Figure 7 It is a schematic diagram of the planar structure of the anti-tripping buckle 8 with an elliptical hole 8a2 in the present invention;

[0072] Figure 8 It is a schematic diagram of the structure of the rotating shaft 4 in the present invention;

[0073] Fig. 9 for Figure 8 AA section view;

[0074] Fig.10 It is one of the anti-dropping buckles 8 composed of the circular hole portion 8a3 and the boss through portion 8a4 in the present invention;

[0075] Fig.11 It is the second anti-drop buckle 8 of the present invention, which is composed of a circular hole portion 8a3 and a boss through portion 8a4. DETAILED DESCRIPTION

[0076] The present invention is described in detail below in conjunction with the embodiments and the accompanying drawings to help those skilled in the art better understand the inventive concept of the present invention. However, the protection scope of the claims of the present invention is not limited to the following embodiments. For those skilled in the art, all other embodiments obtained without creative work without departing from the inventive concept of the present invention belong to the protection scope of the present invention.

[0077] Embodiment 1

[0078] like Figures 3 to 11 As shown, the present invention discloses an anti-detachment installation structure of a flip-up armrest of a car seat, which is provided with a first armrest bracket 1, a second armrest bracket 2, an armrest 3, a rotating shaft 4 and a limiting member 5; the first armrest bracket 1 and the second armrest bracket 2 are both fixed on the car seat frame, and the first armrest bracket 1 is closer to the middle position of the car seat than the second armrest bracket 2, the first armrest bracket 1 is provided with a first shaft hole 1a, and the second armrest bracket 2 is provided with a second shaft hole 2a; the armrest 3 and the rotating shaft 4 are fixed and are both arranged in the interval space between the first armrest bracket 1 and the second armrest bracket 2; the first end 4-1 of the rotating shaft 4 is rotatably connected to the first shaft hole 1a, and the second end 4-2 is rotatably connected to the second shaft hole 2a; the limiting member 5 is located on the outer side of the second armrest bracket 2, and is fixedly connected to the second end 4-2 of the rotating shaft 4;

[0079] The position-limiting member 5 is located outside the second armrest bracket 2, which includes two situations: one is that the armrest 3 is the right armrest located on the right side of the automobile seat frame (see Figure 3 ), the first armrest bracket 1 is closer to the middle position of the automobile seat than the second armrest bracket 2, which means that the first armrest bracket 1 is located on the left side of the second armrest bracket 2. In this case, the limiter 5 is located on the right side of the second armrest bracket 2; secondly, the armrest 3 is a left armrest located on the left side of the automobile seat frame (not shown in the drawings, equivalent to Figure 3The first armrest bracket 1 is closer to the middle position of the car seat than the second armrest bracket 2, which means that the first armrest bracket 1 is located on the right side of the second armrest bracket 2. In this case, the limit member 5 is located on the left side of the second armrest bracket 2.

[0080] According to the direction in which the second end portion 4-2 points to the first end portion 4-1, the first end portion 4-1 of the shaft 4 is composed of a shaft portion 4-1-1, a step portion 4-1-2 and a limiting portion 4-1-3 which are connected in sequence, and the limiting portion 4-1-3 has a limiting boss 4-1-3a protruding relative to the step portion 4-1-2 in the radial direction of the shaft 4;

[0081] The anti-drop installation structure is further provided with an anti-drop buckle 8, and the anti-drop buckle 8 is provided with an anti-drop buckle hole 8a;

[0082] The anti-trip buckle 8 is fixedly connected to the outer side of the first handrail bracket 1; the limiting portion 4-1-3 passes through the first shaft hole 1a and the anti-trip buckle hole 8a in sequence and then extends to the outer side of the anti-trip buckle 8, the step portion 4-1-2 can rotate around the axis of the rotating shaft 4 in the anti-trip buckle hole 8a, and the rotating shaft portion 4-1-1 is rotatably connected to the first shaft hole 1a;

[0083] In addition, the limiting boss 4-1-3a matches the anti-dropout hole 8a, so that: when the rotating shaft 4 rotates to the dropout angle, the limiting boss 4-1-3a can move axially along the rotating shaft 4 through the anti-dropout hole 8a; when the rotating shaft 4 rotates away from the dropout angle, the anti-dropout 8 blocks the limiting boss 4-1-3a from moving axially along the rotating shaft 4.

[0084] Thus, when the car seat is impacted and causes the first armrest bracket 1 or the second armrest bracket 2 to be deformed, as long as the shaft 4 is not at the disengagement angle, the limiting effect of the limiting boss 4-1-3a can effectively prevent the first end 4-1 of the shaft 4 from disengaging from the first axial hole 1a of the first armrest bracket 1, thereby preventing the armrest from loosening and causing harm to the passenger. On the one hand, the probability of the shaft 4 being at the disengagement angle in the event of an accident is very low. On the other hand, the disengagement angle can be designed to be the angle at which the armrest 3 is least likely to stay according to the specific car seat model. Therefore, the present invention can prevent the shaft 4 of the armrest 3 from being separated from the first armrest bracket 1 or the second armrest bracket 2 during the use of the car seat, eliminates safety hazards, and ensures the safety of the flippable armrest of the car seat.

[0085] The above is a basic implementation of the first embodiment of the present invention, and further optimization, improvement and limitation can be made on the basis of the basic implementation:

[0086] Preferably, the first armrest bracket 1 and the second armrest bracket 2 are both welded to the car seat frame, and the anti-drop buckle 8 is welded to the outer side of the first armrest bracket 1 .

[0087] The present invention also discloses an anti-detachment installation method for a flip-over armrest of a car seat, which is used for assembling the anti-detachment installation structure;

[0088] The anti-drop installation method comprises:

[0089] Step S1, pre-fixing a first armrest bracket 1 and a second armrest bracket 2 on a car seat frame, wherein the first armrest bracket 1 is closer to a middle position of the car seat than the second armrest bracket 2, the first armrest bracket 1 is provided with a first axial hole 1a, the second armrest bracket 2 is provided with a second axial hole 2a, and an anti-drop buckle 8 is fixedly connected to the outer side of the first armrest bracket 1, and the anti-drop buckle 8 is provided with an anti-drop buckle hole 8a;

[0090] Then, after the filling material and the skin of the automobile seat are assembled, the following steps S2 to S4 are performed;

[0091] Step S2, using a handrail 3 fixed with a rotating shaft 4, wherein the two ends of the rotating shaft 4 are respectively marked as a first end 4-1 and a second end 4-2, and according to the direction in which the second end 4-2 points to the first end 4-1, the first end 4-1 of the rotating shaft 4 is composed of a rotating shaft portion 4-1-1, a step portion 4-1-2 and a limiting portion 4-1-3 connected in sequence, and the limiting portion 4-1-3 has a limiting boss 4-1-3a protruding relative to the step portion 4-1-2 in the radial direction of the rotating shaft 4;

[0092] Step S3, placing the handrail 3 and the rotating shaft 4 in the interval space between the first handrail bracket 1 and the second handrail bracket 2, and installing the first end 4-1 of the rotating shaft 4 to the first shaft hole 1a, that is, the limiting portion 4-1-3 passes through the first shaft hole 1a and the anti-tripping hole 8a in sequence and then extends to the outside of the anti-tripping buckle 8, the step portion 4-1-2 is in the anti-tripping hole 8a, and the rotating shaft portion 4-1-1 is rotatably connected to the first shaft hole 1a, wherein the step portion 4-1-2 can rotate around the axis of the rotating shaft 4 in the anti-tripping hole 8a; so that: the second end 4-2 of the rotating shaft 4 is aligned with the second shaft hole 2a;

[0093] Among them, since the present invention only designs the matching limiting boss 4-1-3a and the anti-dropping buckle hole 8a as follows: after the anti-dropping installation structure of the present invention is assembled, that is, after steps S1 to S4 are completed, when the rotating shaft 4 leaves the drop-out angle and the rotating shaft 4 moves axially, the anti-dropping buckle 8 will block the limiting boss 4-1-3a. Therefore, in step S3, when the second end 4-2 is not rotatably connected to the second shaft hole 2a and is not fixedly connected to the limiting member 5, as long as the rotating shaft 4 is slightly tilted or rotated to a suitable angle range, the first end 4-1 of the rotating shaft 4 can be smoothly installed in the first shaft hole 1a;

[0094] Step S4, placing the limiting member 5 on the outside of the second handrail bracket 2, and fixing the limiting member 5 to the second end portion 4-2 of the rotating shaft 4, so that the second end portion 4-2 is rotatably connected to the second shaft hole 2a;

[0095] Among them, the limiting boss 4-1-3a matches the anti-dropout hole 8a, so that: when the rotating shaft 4 rotates to the disengagement angle, the limiting boss 4-1-3a can move axially along the rotating shaft 4 through the anti-dropout hole 8a; when the rotating shaft 4 rotates away from the disengagement angle, the anti-dropout 8 blocks the limiting boss 4-1-3a from moving axially along the rotating shaft 4.

[0096] Therefore, the present invention is assembled in the order of step S1 to step S4. On the one hand, there is no need to use the interval between the first armrest bracket 1 and the car seat frame during the assembly process, thereby avoiding the problem that the assembly process cannot proceed smoothly due to the interval between the first armrest bracket 1 and the car seat frame being too small or even without interval; on the other hand, after completing the assembly of the filler and skin of the car seat, the armrest 3, the rotating shaft 4 and the limit member 5 can be installed on the first armrest bracket 1 and the second armrest bracket 2 pre-fixed on the car seat frame (i.e., step S2 to step S4), thereby avoiding the existing double-sided limit installation method that requires improving the strength of the armrest installation frame, adding plastic guard plates, and making corresponding special designs for the car seat frame, filler and skin for the installation of the plastic guard plates, which greatly increases the cost and the complicated and time-consuming installation steps. Compared with the existing single-sided limit installation method, the increase in cost and assembly time is very small, which is much lower than the existing double-sided limit installation method.

[0097] In summary, the present invention has the advantages of high safety, low cost and easy installation.

[0098] Embodiment 2

[0099] On the basis of the above-mentioned embodiment 1, this embodiment 2 also adopts the following preferred implementation manner:

[0100] like Figures 6 to 9 As shown, the anti-dropping hole 8a of the anti-dropping buckle 8 is provided with a rectangular hole 8a1 or an elliptical hole 8a2, and the width of the rectangular hole 8a1 and the short axis of the elliptical hole 8a2 are both recorded as the maximum width W of the anti-dropping hole 8a, and the length of the rectangular hole 8a1 and the long axis of the elliptical hole 8a2 are both recorded as the maximum length L of the anti-dropping hole 8a;

[0101] The step portion 4-1-2 and the limit portion 4-1-3 of the shaft 4 each have two mutually parallel cross-sections, one cross-section of the step portion 4-1-2 and the limit portion 4-1-3 is coplanar to form a first shaft cross-section 4-1a, and the other cross-section of the step portion 4-1-2 and the limit portion 4-1-3 is coplanar to form a second shaft cross-section 4-1b;

[0102] The thickness T between the first rotating shaft section 4-1a and the second rotating shaft section 4-1b is below the maximum width W, the maximum dimension D1 of the limiting portion 4-1-3 in the radial direction of the rotating shaft 4, i.e., at the limiting boss 4-1-3a, is greater than the maximum width W and is below the maximum length L of the anti-dropping hole 8a, the limiting boss 4-1-3a is located between the planes where the first rotating shaft section 4-1a and the second rotating shaft section 4-1b are located (i.e., the thickness of the limiting boss 4-1-3a does not exceed the thickness T), and when the rotating shaft 4 is rotated to the disengagement angle, the first rotating shaft section 4-1a is parallel to the long side of the rectangular hole 8a1 or the long axis of the elliptical hole 8a2, so that the limiting boss 4-1-3a matches the anti-dropping hole 8a;

[0103] The maximum dimension D2 of the step portion 4 - 1 - 2 in the radial direction of the rotating shaft 4 is smaller than the maximum width W, so that the step portion 4 - 1 - 2 can rotate around the axis of the rotating shaft 4 in the anti-drop hole 8 a .

[0104] Therefore, the second embodiment utilizes the size setting to achieve the limiting and assembly and disassembly between the first end portion 4 - 1 and the anti-drop buckle 8 , which has the advantages of simple processing and convenient and smooth assembly.

[0105] Embodiment 3

[0106] On the basis of the above-mentioned embodiment 1, this embodiment 3 also adopts the following preferred implementation manner:

[0107] like Figures 8 to 11 As shown, the anti-drop hole 8a of the anti-drop buckle 8 is composed of a circular hole portion 8a3 and a boss passing portion 8a4, and the boss passing portion 8a4 protrudes from the edge of the circular hole portion 8a3;

[0108] The step portion 4-1-2 has a circular cross section or a partially circular cross section (eg Figure 8 , 9The diameter of the circular cross section or the partially circular cross section is less than the diameter of the circular hole portion 8a3, so that the step portion 4-1-2 can rotate around the axis of the rotating shaft 4 in the circular hole portion 8a3 of the anti-drop hole 8a;

[0109] When the rotating shaft 4 rotates to the disengagement angle, the limiting portion 4-1-3 is aligned with the boss passing portion 8a4, so that the limiting boss 4-1-3a matches the anti-dropping hole 8a.

[0110] Therefore, the third embodiment can make the step portion 4 - 1 - 2 have a larger cross-sectional area, so as to improve the strength of the rotating shaft 4 at the step portion 4 - 1 - 2 and prevent the rotating shaft 4 from being deformed and damaged during operation.

[0111] Embodiment 4

[0112] Based on any one of the above embodiments 1 to 3, this embodiment 4 also adopts the following preferred implementation modes:

[0113] like Figures 3 to 5 As shown, the shaft portion 4-1-1 is rotatably installed in the first shaft hole 1a, and a bushing 9 is provided between the shaft portion 4-1-1 and the first shaft hole 1a to reduce the friction between the shaft portion 4-1-1 and the first shaft hole 1a.

[0114] On the premise that the friction force requirement can be met, the bushing 9 can also be omitted.

[0115] Embodiment 5

[0116] Based on any one of the above embodiments 1 to 4, this embodiment 5 also adopts the following preferred implementation modes:

[0117] like Figures 3 to 5 As shown, the anti-slip installation structure is also provided with a cover plate 10 and a limit pin 11. The cover plate 10 is fixedly connected to the inner side of the first handrail bracket 1, and the cover plate 10 is provided with a cover plate arc-shaped limit groove 10a, and the first handrail bracket 1 is provided with a bracket arc-shaped limit groove 1b; the limit pin 11 is fixed to the handrail 3, and the limit pin 11 passes through the cover plate arc-shaped limit groove 10a and the bracket arc-shaped limit groove 1b.

[0118] Thus, the cooperation between the limit pin 11 and the arc-shaped limit groove 1b of the bracket can be used to limit the flipping angle of the armrest 3. When the limit pin 11 passes through the arc-shaped limit groove 10a of the cover plate, the cover plate 10 can be used to form resistance to the flipping of the armrest 3, so that the armrest 3 can remain stable during driving.

[0119] The above is a basic implementation of the fifth embodiment, and further optimization, improvement and limitation can be made on the basis of the basic implementation:

[0120] Preferably, the bushing 9 and the cover plate 10 are integrally formed, and the cover plate 10 is fixedly connected to the inner side of the first armrest bracket 1 by means of a snap connection.

[0121] Embodiment 6

[0122] Based on any one of the above embodiments 1 to 5, this embodiment 6 also adopts the following preferred implementation modes:

[0123] like Figure 3 As shown, a threaded hole 4-2a is provided on the end face of the second end portion 4-2 of the rotating shaft 4, and the limiting member 5 is a bolt, which is composed of a screw portion 5-1, an axial portion 5-2 and a head portion 5-3 connected in sequence; the screw portion 5-1 is threadedly connected and fixed to the threaded hole 4-2a, the axial portion 5-2 is rotatably installed in the second axial hole 2a, and the head portion 5-3 is located on the outside of the second handrail bracket 2 to play a limiting role.

[0124] Embodiment 7

[0125] Based on any one of the above embodiments 1 to 6, this embodiment 7 also adopts the following preferred implementation modes:

[0126] A rivet hole is provided on the end face of the second end portion 4-2 of the rotating shaft 4, and the limiting member 5 is a rivet; the rivet rod is riveted to the rivet hole, and the head of the rivet is located on the outside of the second handrail bracket 2 to play a limiting role.

[0127] In addition, the above-mentioned Embodiment 2 and Embodiment 3 are only preferred embodiments of the first end portion 4-1 of the rotating shaft 4 and the anti-drop buckle 8 of the present invention. As long as they comply with the structural description of the two in the embodiment of the present invention and the description of the working mode of the anti-drop structure after they are matched, their shapes can be set arbitrarily. For example: in the above-mentioned Embodiment 2, only one section or more sections can be set; or, the step portion 4-1-2 can be designed as a cylindrical shape, the cross-section of the limiting portion 4-1-3 can be designed as a special-shaped section, and the shape of the anti-drop buckle hole 8a can be designed to be the same as the special-shaped section.

[0128] The present invention is not limited to the above-mentioned specific implementation modes. According to the above-mentioned contents, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the present invention, the present invention can also make other various forms of equivalent modifications, replacements or changes, all of which fall within the protection scope of the present invention.

Claims

1. An anti-drop installation structure for a reversible armrest of a car seat, comprising a first armrest bracket (1), a second armrest bracket (2), an armrest (3), a rotating shaft (4) and a stopper (5); the first armrest bracket (1) and the second armrest bracket (2) are both fixed to a car seat frame, and the first armrest bracket (1) is closer to the middle position of the car seat than the second armrest bracket (2); the first armrest bracket (1) is provided with a first shaft hole (1a), and the second armrest bracket (2) is provided with a second shaft hole (2a); the armrest (3) and the rotating shaft (4) are fixed to each other and are both arranged in the interval between the first armrest bracket (1) and the second armrest bracket (2); the first end (4-1) of the rotating shaft (4) is rotatably connected to the first shaft hole (1a), and the second end (4-2) is rotatably connected to the second shaft hole (2a); the stopper (5) is located on the outer side of the second armrest bracket (2) and is fixedly connected to the second end (4-2) of the rotating shaft (4); Features: According to the direction in which the second end portion (4-2) points toward the first end portion (4-1), the first end portion (4-1) of the rotating shaft (4) is composed of a rotating shaft portion (4-1-1), a step portion (4-1-2) and a limiting portion (4-1-3) which are connected in sequence, and the limiting portion (4-1-3) has a limiting boss (4-1-3a) which protrudes relative to the step portion (4-1-2) in the radial direction of the rotating shaft (4); The anti-dropout installation structure is further provided with an anti-dropout buckle (8), and the anti-dropout buckle (8) is provided with an anti-dropout buckle hole (8a); The anti-drop buckle (8) is fixedly connected to the outer side of the first handrail bracket (1); the limiting portion (4-1-3) passes through the first shaft hole (1a) and the anti-drop buckle hole (8a) in sequence and then extends to the outer side of the anti-drop buckle (8); the step portion (4-1-2) can rotate around the axis of the rotating shaft (4) in the anti-drop buckle hole (8a); and the rotating shaft portion (4-1-1) is rotatably connected to the first shaft hole (1a); Furthermore, the limiting boss (4-1-3a) matches the anti-dropout hole (8a), so that: when the rotating shaft (4) rotates to a dropout angle, the limiting boss (4-1-3a) can move axially along the rotating shaft (4) through the anti-dropout hole (8a); when the rotating shaft (4) rotates away from the dropout angle, the anti-dropout (8) blocks the limiting boss (4-1-3a) from moving axially along the rotating shaft (4); The anti-drop hole (8a) of the anti-drop (8) is composed of a circular hole portion (8a3) and a boss passing portion (8a4), and the boss passing portion (8a4) protrudes from the edge of the circular hole portion (8a3); The step portion (4-1-2) has a circular cross section or a partially circular cross section, the diameter of the circular cross section or the partially circular cross section is smaller than the diameter of the circular hole portion (8a3), so that the step portion (4-1-2) can rotate around the axis of the rotating shaft (4) in the circular hole portion (8a3) of the anti-drop hole (8a); When the rotating shaft (4) rotates to the disengagement angle, the limiting portion (4-1-3) is aligned with the boss passing portion (8a4), so that the limiting boss (4-1-3a) matches the anti-dropping hole (8a); The anti-drop installation structure is further provided with a cover plate (10) and a limit pin (11); the cover plate (10) is fixedly connected to the inner side of the first handrail bracket (1), and the cover plate (10) is provided with a cover plate arc-shaped limit groove (10a); the first handrail bracket (1) is provided with a bracket arc-shaped limit groove (1b); the limit pin (11) is fixed to the handrail (3), and the limit pin (11) passes through the cover plate arc-shaped limit groove (10a) and the bracket arc-shaped limit groove (1b); The first armrest bracket (1) and the second armrest bracket (2) are both welded to the automobile seat frame, and the anti-drop buckle (8) is welded to the outer side of the first armrest bracket (1).

2. The anti-drop installation structure of the flip armrest of a car seat according to claim 1, characterized in that: The rotating shaft portion (4-1-1) is rotatably mounted in the first shaft hole (1a), and a bushing (9) is provided between the rotating shaft portion (4-1-1) and the first shaft hole (1a).

3. The anti-drop installation structure of the flip armrest of a car seat according to claim 2, characterized in that: The bushing (9) and the cover plate (10) are integrally formed, and the cover plate (10) is fixedly connected to the inner side of the first handrail bracket (1) by means of a snap connection.

4. The anti-drop installation structure of the flip armrest of a car seat according to claim 1, characterized in that: A threaded hole (4-2a) is provided on the end surface of the second end portion (4-2) of the rotating shaft (4); the limiting member (5) is a bolt, which is composed of a screw portion (5-1), an axial portion (5-2) and a head portion (5-3) which are connected in sequence; the screw portion (5-1) is threadedly connected and fixed to the threaded hole (4-2a); the axial portion (5-2) is rotatably mounted in the second axial hole (2a); and the head portion (5-3) is located outside the second handrail bracket (2) and plays a limiting role.

5. The anti-drop installation structure of the flip armrest of a car seat according to claim 1, characterized in that: A rivet hole is provided on the end surface of the second end portion (4-2) of the rotating shaft (4), and the limiting member (5) is a rivet; the rivet rod is riveted to the rivet hole, and the head of the rivet is located outside the second handrail bracket (2) to play a limiting role.

6. A method for preventing the reversible armrest of a car seat from falling off, characterized in that: The anti-slip installation method is used for assembling the anti-slip installation structure according to any one of claims 1 to 5; The anti-drop installation method comprises: Step S1, pre-fixing a first armrest bracket (1) and a second armrest bracket (2) on a car seat frame, wherein the first armrest bracket (1) is closer to a middle position of the car seat than the second armrest bracket (2), the first armrest bracket (1) is provided with a first axial hole (1a), the second armrest bracket (2) is provided with a second axial hole (2a), and an anti-drop buckle (8) is fixedly connected to the outer side of the first armrest bracket (1), and the anti-drop buckle (8) is provided with an anti-drop buckle hole (8a); Then, after the filling material and the skin of the automobile seat are assembled, the following steps S2 to S4 are performed; Step S2, using a handrail (3) fixed with a rotating shaft (4), wherein two ends of the rotating shaft (4) are respectively marked as a first end (4-1) and a second end (4-2), and in the direction in which the second end (4-2) points to the first end (4-1), the first end (4-1) of the rotating shaft (4) is composed of a rotating shaft portion (4-1-1), a step portion (4-1-2) and a limiting portion (4-1-3) connected in sequence, and the limiting portion (4-1-3) has a limiting boss (4-1-3a) protruding relative to the step portion (4-1-2) in the radial direction of the rotating shaft (4); Step S3, placing the handrail (3) and the rotating shaft (4) in the interval space between the first handrail bracket (1) and the second handrail bracket (2), and installing the first end (4-1) of the rotating shaft (4) into the first shaft hole (1a), that is, the limiting portion (4-1-3) sequentially passes through the first shaft hole (1a) and the anti-dropping hole (8a) and then extends to the outside of the anti-dropping hole (8), the step portion (4-1-2) is in the anti-dropping hole (8a), and the rotating shaft portion (4-1-1) is rotatably connected to the first shaft hole (1a), wherein the step portion (4-1-2) can rotate around the axis of the rotating shaft (4) in the anti-dropping hole (8a); so that the second end (4-2) of the rotating shaft (4) is aligned with the second shaft hole (2a); Step S4, placing the limiting member (5) on the outside of the second handrail bracket (2), and using the limiting member (5) to fixedly connect the second end portion (4-2) of the rotating shaft (4), so that the second end portion (4-2) is rotatably connected to the second shaft hole (2a); The limiting boss (4-1-3a) matches the anti-dropout hole (8a) so that: when the rotating shaft (4) is rotated to a dropout angle, the limiting boss (4-1-3a) can move axially along the rotating shaft (4) through the anti-dropout hole (8a); and when the rotating shaft (4) is rotated away from the dropout angle, the anti-dropout (8) blocks the limiting boss (4-1-3a) from moving axially along the rotating shaft (4).

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