An automobile seat

Abstract

The utility model discloses a kind of automobile seats, it is related to automobile field.The automobile seat includes backrest framework and shoulder adjusting mechanism, shoulder adjusting mechanism includes pivot bracket, fixed support, sliding member, connecting rod and drive assembly, pivot bracket is hinged in backrest framework, fixed support is fixedly connected in one of backrest framework and pivot bracket;Sliding member and fixed support sliding fit, one end of connecting rod is hinged in sliding member, the other end is hinged in the other of backrest framework and pivot bracket;Drive assembly and sliding member transmission connection are configured as drive sliding member relative fixed support sliding, to rotate pivot bracket by connecting rod drive.The utility model provides the automobile seat with the characteristics of more simple structure, higher reliability, more optimal carrying capacity and longer service life.

Description

Technical Field

[0001] This utility model relates to the automotive field, and more specifically, to an automotive seat. Background Technology

[0002] Some car seats on the market are equipped with shoulder adjustment mechanisms, which can adjust the tilt angle relative to the seat back in the fore-and-aft direction, thereby providing better shoulder support and riding comfort for drivers and passengers.

[0003] However, existing shoulder adjustment mechanisms generally suffer from limited adjustment range, a large number of parts, and complex structures, resulting in a complex overall structure for car seats and significant gaps between parts. Furthermore, the force exerted by the occupants directly impacts the drive components of the shoulder adjustment mechanism, which can easily cause deformation or even damage to these components, affecting the reliability and lifespan of the car seat. Utility Model Content

[0004] The purpose of this utility model is to provide a car seat that has a simpler structure, a larger shoulder adjustment range, smaller gaps between parts, higher reliability, and a longer service life.

[0005] The embodiments of this utility model provide a technical solution: A car seat includes a backrest frame and a shoulder adjustment mechanism. The shoulder adjustment mechanism includes a pivot bracket, a fixed bracket, a sliding member, a connecting rod, and a drive assembly. The pivot bracket is pivotally connected to the backrest frame, and the fixed bracket is fixedly connected to one of the backrest frame and the pivot bracket. The sliding member is slidably engaged with the fixed bracket, and one end of the connecting rod is pivotally connected to the sliding member, while the other end is pivotally connected to the other of the backrest frame and the pivot bracket. The drive assembly is connected to the slider and configured to drive the slider to slide relative to the fixed bracket, thereby driving the pivot bracket to rotate via the connecting rod.

[0006] In an optional embodiment, the drive assembly includes a motor and a rotating lead screw, the motor being fixedly connected to the fixed bracket, and the rotating lead screw being drively connected to the motor; The sliding element is sleeved on the rotating lead screw and threadedly engaged with the rotating lead screw; the rotating lead screw is configured to rotate under the drive of the motor, so as to drive the sliding element to slide along the rotating lead screw.

[0007] In an optional embodiment, the drive assembly includes a turbine motor assembly and a fixing screw, the fixing screw being fixedly connected to the fixing bracket, the turbine motor assembly being sleeved on the fixing screw and threadedly engaged with the fixing screw; The sliding member is fixedly connected to the turbine motor assembly, which is configured to move along the fixed lead screw to drive the sliding member to slide along the fixed lead screw.

[0008] In an optional embodiment, the fixed bracket has a groove, and the sliding member and the connecting rod are respectively located on opposite sides of the groove; The shoulder adjustment mechanism also includes a pivot assembly passing through the slide groove, and the connecting rod is pivotally connected to the sliding member through the pivot assembly.

[0009] In an optional embodiment, the pivot assembly includes a first bushing and a stepped bolt, the connecting rod is provided with a pivot hole, the first bushing is sleeved in the pivot hole, and the stepped bolt passes through the first bushing and the slide groove in sequence and is threadedly connected to the sliding member.

[0010] In an optional embodiment, the shoulder adjustment mechanism further includes a second bushing, which is fitted inside the groove or onto the stepped bolt.

[0011] In an optional embodiment, the number of the slide groove, the connecting rod, and the pivot assembly are all two, the two slide grooves are arranged side by side and spaced apart, and the sliding member is located between the two slide grooves; The two connecting rods are located on opposite sides of the two sliding grooves and are pivotally connected to the opposite sides of the sliding member by the two pivoting assemblies.

[0012] In an optional embodiment, the fixed bracket is provided with a guide post, and the sliding member is sleeved on the guide post and slides in cooperation with the guide post.

[0013] In an optional embodiment, the shoulder adjustment mechanism further includes a gap-eliminating component, which includes a self-lubricating element and an elastic element. One end of the elastic element abuts against the sliding element, and the other end abuts against the self-lubricating element, so as to press the self-lubricating element against the fixed bracket, while continuously applying an elastic force perpendicular to the sliding direction of the sliding element to the sliding element.

[0014] Compared to existing technologies, the car seat provided in this embodiment of the invention features a sliding engagement between the sliding component and the fixed bracket. Most of the leaning force exerted by the occupant on the pivot bracket is transmitted to the fixed bracket via the sliding component, resulting in less stress on the drive assembly and preventing deformation and failure. Furthermore, the drive assembly, through a combination of linkage and sliding component transmission, drives the pivot bracket to rotate relative to the backrest frame, achieving greater shoulder adjustment. With fewer components and smaller gaps between parts, the overall structure is simpler, more reliable, and has superior load-bearing capacity. Therefore, the car seat provided by this invention offers the following advantages: simpler structure, higher reliability, superior load-bearing capacity, and longer service life. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and therefore should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a partial structural schematic diagram of a car seat provided in the first embodiment of the present utility model; Figure 2 for Figure 1 An exploded view of the structure shown; Figure 3 for Figure 1 A schematic diagram of the middle shoulder adjustment mechanism; Figure 4 for Figure 1 Exploded view of the shoulder adjustment mechanism; Figure 5 for Figure 4 Schematic diagram of the connection structure between the central connecting rod and the pivot support; Figure 6 for Figure 5 An exploded view of the structure shown; Figure 7 for Figure 4 A schematic diagram of the connection structure of the drive assembly, slider, and fixed bracket; Figure 8 for Figure 7 An exploded view of the structure shown; Figure 9 for Figure 4 Schematic diagram of the connection structure between the drive component and the slider; Figure 10 for Figure 9 Schematic diagram of the backlash elimination component; Figure 11 This is an exploded view of the gap elimination component; Figure 12 for Figure 1 The diagram shown is a structural schematic of a car seat in its initial state. Figure 13 This is a schematic diagram of the shoulder adjustment mechanism in its initial state. Figure 14 This is a schematic diagram of the connection structure between the sliding component and the fixed bracket in the initial state. Figure 15 This is a schematic diagram of the shoulder adjustment mechanism in its intermediate state; Figure 16This is a schematic diagram of the connection structure between the sliding component and the fixed bracket in the intermediate state. Figure 17 This is a schematic diagram of the shoulder adjustment mechanism under extreme conditions; Figure 18 This is a schematic diagram of the connection structure between the sliding component and the fixed bracket under extreme conditions. Figure 19 A simplified structural diagram of the car seat in its initial state as provided in the first embodiment; Figure 20 A simplified structural diagram of the car seat provided in the first embodiment under extreme conditions; Figure 21 A simplified structural diagram of a car seat in its initial state, provided for another embodiment; Figure 22 for Figure 21 The diagram shown is a simplified structural diagram of a car seat under extreme conditions. Figure 23 A simplified structural diagram of a car seat in its initial state, provided for the second embodiment of this utility model; Figure 24 A simplified structural diagram of the car seat under extreme conditions provided in the second embodiment; Figure 25 A simplified structural diagram of a car seat in its initial state, provided for yet another embodiment; Figure 26 for Figure 25 The diagram shown is a simplified structural diagram of a car seat under extreme conditions. Figure 27 A partial structural schematic diagram of the shoulder adjustment mechanism of a car seat provided in the third embodiment of this utility model; Figure 28 for Figure 27 An exploded view of the structure shown; Figure 29 for Figure 27 Schematic diagram of the connection structure between the drive component and the slider; Figure 30 A partial structural schematic diagram of a car seat provided for the fourth embodiment of this utility model; Figure 31 for Figure 30 A partial structural diagram of the shoulder adjustment mechanism; Figure 32 for Figure 31 A schematic diagram of the connection structure between the drive component and the slider.

[0017] Icons: 100 - Car seat; 110 - Backrest frame; 120 - Shoulder adjustment mechanism; 121 - Pivot bracket; 1211 - Swing arm; 1212 - Housing; 1213 - Headrest bracket; 122 - Fixed bracket; 1221 - Slide groove; 1222 - Flanged edge; 1223 - Guide column; 123 - Sliding element; 1231 - Sliding block; 1232 - Clamp; 124 - Connecting rod; 125 - Drive assembly; 1251 - Motor; 1252 - Rotary lead screw; 1253 - Turbine motor assembly; 1254 - Fixed lead screw; 126 - First bushing; 127 - Step bolt; 128 - Second bushing; 129 - Backlash elimination assembly; 1291 - Self-lubricating element; 1292 - Elastic element. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] First Embodiment Please refer to the following: Figure 1 and Figure 2 , Figure 1 The diagram shown is a partial structural schematic of the car seat 100 provided in this embodiment. Figure 2 As shown Figure 1 An exploded view of the structure shown.

[0026] This embodiment provides a car seat 100, including a backrest frame 110 and a shoulder adjustment mechanism 120. The shoulder adjustment mechanism 120 is mounted on the backrest frame 110 and can provide adjustable shoulder support for the driver and passengers. It is understood that the car seat 100 may also include conventional components and structures such as a seat cushion and headrest, which will not be described in detail in this embodiment.

[0027] Please refer to the following: Figure 3 and Figure 4 , Figure 3 The diagram shown is a structural schematic of the shoulder adjustment mechanism 120. Figure 3 The diagram shown is an exploded view of the shoulder adjustment mechanism 120.

[0028] In this embodiment, the shoulder adjustment mechanism 120 includes a pivot bracket 121, a fixed bracket 122, a sliding member 123, a connecting rod 124, and a drive assembly 125. The pivot bracket 121 is pivotally connected to the backrest frame 110, the fixed bracket 122 is fixedly connected to the backrest frame 110, and the sliding member 123 is slidably engaged with the fixed bracket 122. One end of the connecting rod 124 is pivotally connected to the sliding member 123, and the other end is pivotally connected to the pivot bracket 121. The drive assembly 125 is drively connected to the sliding member 123 and is configured to drive the sliding member 123 to slide relative to the fixed bracket 122, thereby driving the pivot bracket 121 to rotate via the connecting rod 124.

[0029] Preferably, in this embodiment, the pivot bracket 121 is pivotally connected to the backrest frame 110 about a horizontally extending pivot axis, which actually extends in the left-right direction of the backrest frame 110. If the vehicle is used as a reference standard, the pivot axis extends in the width direction of the vehicle. The orientation descriptions in this embodiment are all based on the vehicle as a reference standard.

[0030] In practical applications, the drive component 125 drives the slider 123 to slide on the fixed bracket 122, thereby causing the connecting rod 124 to swing, which in turn causes the pivot bracket 121 to rotate relative to the backrest frame 110 around its pivot axis, thereby adjusting the tilt angle of the pivot bracket 121 in the front-back direction.

[0031] In practical applications, the pivot bracket 121 actually serves to support the shoulders of the driver and passengers. By adjusting the tilt angle of the pivot bracket 121 in the front-back direction, the support position of the driver and passengers' shoulders can be adjusted to improve the riding comfort of the driver and passengers.

[0032] Because the sliding member 123 slides into the fixed bracket 122, the force exerted by the driver and passengers on the pivot bracket 121 is transmitted from the sliding member 123 to the fixed bracket 122, preventing excessive force on the drive assembly 125 and effectively preventing deformation and failure of the drive assembly 125. Furthermore, the combined transmission via the connecting rod 124 and the sliding member 123 significantly reduces the number of parts and the gaps between parts compared to the traditional shoulder adjustment mechanism 120, simplifying the overall structure and greatly improving reliability and load-bearing capacity.

[0033] Please refer to the following: Figure 5 and Figure 6 , Figure 5 The diagram shows the connection structure between the connecting rod 124 and the pivot bracket 121. Figure 7 As shown Figure 5 An exploded view of the structure shown.

[0034] The pivot bracket 121 includes a swing arm 1211 and a housing 1212 connected to each other. The two ends of the swing arm 1211 are pivotally connected to the two side plates of the backrest frame 110, namely the left side plate and the right side plate, respectively, via pivot shafts. The housing 1212 is located between the two ends of the swing arm 1211, and the end of the connecting rod 124 away from the sliding member 123 is pivotally connected to the housing 1212 via a pivot shaft.

[0035] In this embodiment, the swing arm 1211 is roughly in the shape of a "Z" shape, and the housing 1212 is connected to the top of the swing arm 1211. The housing 1212 can selectively install a headrest bracket 1213 according to functional requirements. The headrest bracket 1213 is used to install a headrest. It is understood that when the headrest is installed on the headrest bracket 1213, the headrest can move synchronously with the rotation of the pivot bracket 121.

[0036] Preferably, in this embodiment, there are two connecting rods 124. One end of each of the two connecting rods 124 is pivotally connected to the housing 1212 via a pivot. In another embodiment, they can also be pivotally connected to the swing arm 1211. The ends of the two connecting rods 124 that are away from the housing 1212 are pivotally connected to the left and right sides of the sliding member 123.

[0037] In practical applications, when the drive assembly 125 drives the slider 123 to slide on the fixed bracket 122, the two connecting rods 124 together drive the pivot bracket 121 to rotate, so as to ensure that the pivot bracket 121 rotates smoothly and provide reliable support for the pivot bracket 121.

[0038] In this application, the number of connecting rods 124 is not specifically limited. It should be noted that in another embodiment, if there is only one connecting rod 124, the end of the connecting rod 124 away from the pivot bracket 121 can be pivotally connected to the middle position of the slider 123 in the left-right direction to ensure that the slider 123 is subjected to balanced force and the sliding process is smooth and does not jam.

[0039] Please refer to the following: Figure 7 , Figure 8 and Figure 9 , Figure 7 The diagram shows the connection structure of the drive assembly 125, the slider 123, and the fixed bracket 122. Figure 8 As shown Figure 7 An exploded view of the structure shown. Figure 9 The diagram shows the connection structure between the drive assembly 125 and the slider 123.

[0040] In this embodiment, the drive assembly 125 includes a motor 1251 and a rotating lead screw 1252. The motor 1251 is fixed to the fixed bracket 122, and the rotating lead screw 1252 extends in a vertical plane and is connected to the motor 1251 in a transmission manner. A sliding member 123 is sleeved on the rotating lead screw 1252 and is threadedly engaged with the rotating lead screw 1252. The rotating lead screw 1252 is configured to rotate under the drive of the motor 1251, so as to drive the sliding member 123 to slide relative to the fixed bracket 122.

[0041] It is understandable that the extension direction of the rotating lead screw 1252 is the same as the sliding direction of the slider 123. In practical applications, when the motor 1251 drives the rotating lead screw 1252 to rotate, the slider 123 is restricted in its rotational motion by the fixed bracket 122 due to its sliding engagement with the fixed bracket 122. Relative rotation occurs between the rotating lead screw 1252 and the slider 123, thereby causing the slider 123 to slide linearly on the fixed bracket 122.

[0042] In practical applications, depending on strength requirements, one or both ends of the rotating lead screw 1252 can be limited. In this embodiment, one end of the rotating lead screw 1252 is connected to the motor 1251 for transmission, while the other end is suspended. In another embodiment, one end of the rotating lead screw 1252 can be rotatably connected to the fixed bracket 122 or the backrest frame 110, while the other end is suspended. Alternatively, both ends of the rotating lead screw 1252 can be rotatably connected to the fixed bracket 122 or the backrest frame 110, or both ends of the rotating lead screw 1252 can be rotatably connected to both the fixed bracket 122 and the backrest frame 110 respectively.

[0043] In this embodiment, the fixed bracket 122 has a slide groove 1221 extending in a vertical plane. The slide groove 1221 is parallel to the rotating lead screw 1252. The sliding member 123 and the connecting rod 124 are respectively located on opposite sides of the slide groove 1221. The shoulder adjustment mechanism 120 also includes a pivot assembly passing through the slide groove 1221. The connecting rod 124 is pivotally connected to the sliding member 123 through the pivot assembly.

[0044] It is understandable that during the linear sliding of the slider 123 on the fixed bracket 122, it drives the pivot assembly to slide in the slide groove 1221, thereby causing the connecting rod 124 to swing in the vertical plane, and then causing the pivot bracket 121 to rotate around its pivot axis.

[0045] Specifically, the fixed bracket 122 also has two parallel and spaced-apart flanges 1222, each flange 1222 having a through groove 1221. The sliding member 123 is located between the two flanges 1222, and the two flanges 1222 limit the sliding member 123 in the left and right directions. The ends of the two connecting rods 124 away from the pivot bracket 121 are located on opposite sides of the two grooves 1221, and are pivotally connected to the sliding member 123 through a pivot assembly.

[0046] It is understandable that the left and right sides of the slider 123 are restricted by two flanges 1222 respectively, which prevents the slider 123 from moving relative to the fixed bracket 122 in the left and right directions, and from rotating relative to the fixed bracket 122. It can only slide in a straight line along the slide groove 1221.

[0047] In this embodiment, the motor 1251 is located at the bottom end of the fixed bracket 122 and is fixedly connected to the fixed bracket 122. The rotating screw 1252 extends between the two flanges 1222. During the process of the motor 1251 driving the rotating screw 1252 to rotate, the sliding member 123 moves along the rotating screw 1252, and drives the two connecting rods 124 to move along the slide groove 1221 at the ends away from the pivot bracket 121 through the pivot assembly connected on the left and right sides, thereby realizing the synchronous swing of the two connecting rods 124.

[0048] In order to ensure the smooth sliding of the slider 123 and thus ensure the stable rotation of the pivot bracket 121, in this embodiment, the shoulder adjustment mechanism 120 further includes a backlash elimination component 129. The backlash elimination component 129 is disposed between the fixed bracket 122 and the slider 123 and continuously applies a force to the slider 123 so that the pivot component can maintain contact with one side of the groove wall of the slide groove 1221 and reduce the gap of the threaded engagement between the slider 123 and the rotating lead screw 1252.

[0049] By setting the gap elimination component 129, the gap between the parts of the entire shoulder adjustment mechanism 120 is reduced, and the relative displacement of the pivot component in the front and rear directions of the slide groove 1221 is prevented, which would cause the sliding member 123 to wobble during the sliding process.

[0050] In this embodiment, the sliding member 123 includes a slider 1231 that is threadedly engaged with the rotating lead screw 1252, and a clamp 1232 that holds the slider 1231 between its front and rear sides. The left and right ends of the clamp 1232 are pivotally connected to two connecting rods 124 respectively through two pivot components.

[0051] In practical applications, the slider 1231 and the clamp 1232 can be made of different materials. This allows the slider 123 as a whole to meet both the threaded fit requirements with the rotating lead screw 1252 and the pivot connection requirements with the pivot assembly, while effectively reducing production costs. For example, the slider 1231 can be made of plastic, and the clamp 1232 can be made of metal.

[0052] Please refer to the following: Figure 10 and Figure 11 , Figure 10 The diagram shown is a structural schematic of the gap elimination component 129. Figure 11 The diagram shown is an exploded view of the gap elimination component 129.

[0053] The gap-eliminating component 129 provided in this embodiment includes a self-lubricating element 1291 and an elastic element 1292. One end of the elastic element 1292 abuts against the sliding element 123, and the other end abuts against the self-lubricating element 1291, so as to press the self-lubricating element 1291 against the fixed bracket 122, while continuously applying an elastic force perpendicular to the sliding direction of the sliding element 123 to the sliding element 123.

[0054] It is understandable that the elastic element 1292 is always in a compressed state. During the sliding process of the slider 123, the elastic element 1292 drives the self-lubricating element 1291 to slide on the surface of the fixed bracket 122. Since the self-lubricating element 1291 has self-lubricating properties, it can ensure that its sliding process is smooth.

[0055] In another embodiment, depending on the actual application conditions, other structures of the abutment members can be used to replace the self-lubricating member 1291 to further improve the smoothness of the movement process. For example, rollers can be provided on the abutment member, and the rollers abut against the surface of the fixed bracket 122. During the sliding of the sliding member 123, the rollers of the abutment member roll on the surface of the fixed bracket 122, which greatly reduces the friction between the two.

[0056] Furthermore, in order to constrain the movement direction of the self-lubricating component 1291, in another embodiment, a guide structure can be provided on the surface of the fixed bracket 122. The guide structure can be a groove or slide rail parallel to the rotating lead screw 1252, and the self-lubricating component 1291 slides in cooperation with the guide structure.

[0057] In this embodiment, the pivot assembly includes a first bushing 126 and a stepped bolt 127. The end of the connecting rod 124 away from the pivot bracket 121 is provided with a pivot hole. The first bushing 126 is sleeved in the pivot hole. The stepped bolt 127 passes through the first bushing 126 and the slide groove 1221 in sequence and is threadedly connected to the sliding member 123.

[0058] Under the thrust of the elastic element 1292, the stepped bolt 127 remains in contact with one side wall of the slide groove 1221. During the sliding process of the sliding element 123, the sliding element 123 drives the stepped bolt 127 to slide in the slide groove 1221, and the connecting rod 124 rotates relative to the stepped bolt 127 through the first bushing 126, realizing the swing in the vertical plane.

[0059] Considering that the large-area contact and relative sliding between the end of the connecting rod 124 away from the pivot bracket 121 and the flange 1222 of the fixed bracket 122 would generate significant noise, to address this issue, the shoulder adjustment mechanism 120 provided in this embodiment further includes a second bushing 128. The second bushing 128 is fitted within the slide groove 1221, and the side of the second bushing 128 closest to the connecting rod 124 protrudes from the surface of the flange 1222. In another embodiment, the second bushing 128 can also be fitted onto the stepped bolt 127 and protrude from the side of the connecting rod 124 closest to the flange 1222.

[0060] In this embodiment, since the second bushing 128 protrudes from the surface of the flange 1222, the connecting rod 124 contacts the protruding part of the second bushing 128, thereby forming a gap with the surface of the flange 1222. During the movement, the end of the connecting rod 124 away from the pivot bracket 121 contacts and slides relative to the protruding part of the second bushing 128 over a small area, which can significantly reduce noise.

[0061] Furthermore, in practical applications, the second bushing 128 can also be made of a material that is different from the fixed bracket 122 and has a higher surface flatness, or a self-lubricating material, to improve the smoothness of the sliding of the connecting rod 124, thereby further reducing noise.

[0062] Please refer to the following: Figure 12 , Figure 13 and Figure 14 , Figure 12 The diagram shown is a structural schematic of the car seat 100 in its initial state. Figure 13 The diagram shown is a schematic of the shoulder adjustment mechanism 120 in its initial state. Figure 14 The diagram shows the connection structure between the slider 123 and the fixed bracket 122 in the initial state.

[0063] It should be noted that the initial state refers to the state when the angle between the pivot bracket 121 and the backrest frame 110 is the smallest, which is also the state when the distance between the pivot bracket 121 and the fixed bracket 122 in the front-back direction is the smallest. At this time, the pivot bracket 121 provides the rearmost shoulder support for the driver and passengers.

[0064] In this embodiment, in the initial state, the slider 123 is at the bottom end of the rotating lead screw 1252, and the distance between it and the motor 1251 is minimal. The end of the connecting rod 124 away from the pivot bracket 121 is at the bottom end of the slide groove 1221. At this time, the included angle between the connecting rod 124 and the slide groove 1221 is minimal.

[0065] As can be seen, the connecting rod 124 in this embodiment can be set to a relatively long length. In the initial state, it is folded with the pivot bracket 121, which will not affect the minimum distance between the pivot bracket 121 and the fixed bracket 122 in the front-back direction, and can also obtain a larger shoulder adjustment stroke.

[0066] Please refer to the following: Figure 15 and Figure 16 , Figure 15 The diagram shown is a structural schematic of the shoulder adjustment mechanism 120 in the intermediate state. Figure 16 The diagram shows the connection structure between the slider 123 and the fixed bracket 122 in the intermediate state.

[0067] The intermediate state refers to the state in which the pivot bracket 121 rotates forward relative to the backrest frame 110 to the maximum travel. In this state, the distance between the pivot bracket 121 and the fixed bracket 122 in the front-back direction is greater than the distance in the initial state. At this time, the pivot bracket 121 provides shoulder support for the driver and passengers in the middle position in the front-back direction.

[0068] In the intermediate state, the slider 123 is in the middle position of the rotating lead screw 1252. The end of the connecting rod 124 away from the pivot bracket 121 is in the middle position of the slide groove 1221. At this time, the included angle between the connecting rod 124 and the slide groove 1221 is greater than the included angle in the initial state.

[0069] Please refer to the following: Figure 17 and Figure 18 , Figure 17 The diagram shown is a schematic representation of the shoulder adjustment mechanism 120 under extreme conditions. Figure 18 The diagram shows the connection structure between the slider 123 and the fixed bracket 122 under extreme conditions.

[0070] The extreme state refers to the state when the pivot bracket 121 rotates forward to its maximum stroke relative to the backrest frame 110. In this state, the angle between the pivot bracket 121 and the backrest frame 110 is the largest, and the distance between the pivot bracket 121 and the fixed bracket 122 in the front-back direction is the largest. At this time, the pivot bracket 121 provides the most forward shoulder support for the driver and passengers.

[0071] In the extreme state, the slider 123 is at the top of the rotating lead screw 1252. The end of the connecting rod 124 away from the pivot bracket 121 is at the top of the slide groove 1221. At this time, the included angle between the connecting rod 124 and the slide groove 1221 is the largest.

[0072] Please refer to the following: Figure 19 and Figure 20 , Figure 19 The diagram shown is a simplified structural diagram of the car seat 100 provided in this embodiment in its initial state. Figure 20 The diagram shown is a simplified structural diagram of the car seat 100 under extreme conditions.

[0073] In the car seat 100 provided in this embodiment, the motor 1251 is located at the bottom end of the rotating screw 1252. During the process of the shoulder adjustment mechanism 120 switching from the initial state to the limit state, the sliding member 123 moves upward along the rotating screw 1252, and the end of the connecting rod 124 away from the pivot bracket 121 moves from the bottom end of the slide groove 1221 to the top end. The included angle between the connecting rod 124 and the slide groove 1221 gradually increases.

[0074] Conversely, during the process of the shoulder adjustment mechanism 120 resetting from the limit state to the initial state, the sliding member 123 moves downward along the rotating screw 1252, and the end of the connecting rod 124 away from the pivot bracket 121 moves from the top end of the slide groove 1221 to the bottom end, and the included angle between the connecting rod 124 and the slide groove 1221 gradually decreases.

[0075] Please refer to the following: Figure 21 and Figure 22 , Figure 21 The diagram shown is a simplified structural diagram of a car seat 100 in its initial state according to another embodiment. Figure 22 As shown Figure 21 The diagram shows a simplified structural diagram of the car seat 100 under extreme conditions.

[0076] The difference between this embodiment and the first embodiment is that the motor 1251 is located at the top of the rotating lead screw 1252. Similarly, during the process of the shoulder adjustment mechanism 120 switching from the initial state to the limit state, the sliding member 123 moves upward along the rotating lead screw 1252, and the end of the connecting rod 124 away from the pivot bracket 121 moves from the bottom end of the slide groove 1221 to the top end, and the included angle between the connecting rod 124 and the slide groove 1221 gradually increases.

[0077] Conversely, during the process of the shoulder adjustment mechanism 120 resetting from the limit state to the initial state, the sliding member 123 moves downward along the rotating screw 1252, and the end of the connecting rod 124 away from the pivot bracket 121 moves from the top end of the slide groove 1221 to the bottom end, and the included angle between the connecting rod 124 and the slide groove 1221 gradually decreases.

[0078] Second Embodiment Please see Figure 23 and Figure 24 , Figure 23 The diagram shown is a simplified structural diagram of the car seat 100 provided in this embodiment in its initial state. Figure 24 The diagram shown is a simplified structural diagram of the car seat 100 provided in this embodiment under extreme conditions.

[0079] The difference between the car seat 100 provided in this embodiment and the first embodiment is that the fixed bracket 122 is fixedly connected to the pivot bracket 121, and the end of the connecting rod 124 away from the sliding member 123 is pivotally connected to the backrest frame 110.

[0080] In practical applications, when the motor 1251 drives the rotating lead screw 1252 to rotate, the sliding member 123 moves along the rotating lead screw 1252 and drives the two connecting rods 124 to move along the slide groove 1221 at the ends away from the backrest frame 110, thereby realizing the synchronous swing of the two connecting rods 124, which in turn drives the pivot bracket 121 to rotate relative to the backrest frame 110.

[0081] It should be noted that although the motor 1251 is located at the top of the rotating lead screw 1252 in this embodiment, in other embodiments, the motor 1251 may be located at other relative positions of the rotating lead screw 1252, such as at the bottom of the rotating lead screw 1252.

[0082] In this embodiment, the connecting rod 124 is pivotally connected to the backrest frame 110 above the slide groove 1221. During the process of the shoulder adjustment mechanism 120 switching from the initial state to the limit state, the slider 123 moves upward along the rotating lead screw 1252, and the end of the connecting rod 124 away from the backrest frame 110 moves from the bottom end to the top end of the slide groove 1221, and the included angle between the connecting rod 124 and the slide groove 1221 gradually increases.

[0083] Conversely, during the process of the shoulder adjustment mechanism 120 resetting from the limit state to the initial state, the slider 123 moves downward along the rotating screw 1252, and the end of the connecting rod 124 away from the backrest frame 110 moves from the top end of the slide groove 1221 to the bottom end, and the included angle between the connecting rod 124 and the slide groove 1221 gradually decreases.

[0084] Please see Figure 25 and Figure 26 , Figure 25 The diagram shown is a simplified structural diagram of a car seat 100 in its initial state according to another embodiment. Figure 26 As shown Figure 25 The diagram shows a simplified structural diagram of the car seat 100 under extreme conditions.

[0085] The difference between this embodiment and the second embodiment is that the connecting rod 124 is pivotally connected to the backrest frame 110 below the slide groove 1221. During the process of the shoulder adjustment mechanism 120 switching from the initial state to the limit state, the sliding member 123 moves downward along the rotating screw 1252, and the end of the connecting rod 124 away from the backrest frame 110 moves from the top end of the slide groove 1221 to the bottom end, and the included angle between the connecting rod 124 and the slide groove 1221 gradually increases.

[0086] Conversely, during the process of the shoulder adjustment mechanism 120 resetting from the limit state to the initial state, the slider 123 moves upward along the rotating screw 1252, and the end of the connecting rod 124 away from the backrest frame 110 moves from the bottom end of the slide groove 1221 to the top end, and the included angle between the connecting rod 124 and the slide groove 1221 gradually decreases.

[0087] In another embodiment, the pivot position of the connecting rod 124 and the backrest frame 110 can also be in other relative positions of the slide groove 1221. For example, the pivot position of the connecting rod 124 and the backrest frame 110 can also be in the middle region of the slide groove 1221.

[0088] Third Embodiment Please refer to the following: Figure 27 , Figure 28 and Figure 29 , Figure 27 The diagram shown is a partial structural schematic of the shoulder adjustment mechanism 120 of the car seat 100 provided in this embodiment. Figure 28 As shown Figure 27 An exploded view of the structure shown. Figure 29 As shown Figure 27 A schematic diagram of the connection structure between the drive component 125 and the slider 123.

[0089] Compared with the first embodiment and the second embodiment, the difference of the shoulder adjustment mechanism 120 provided in this embodiment is that the fixed bracket 122 has a guide column 1223 extending in a vertical plane, and the sliding member 123 is sleeved on the guide column 1223 and slides in cooperation with the guide column 1223.

[0090] It is understandable that the guide column 1223 is parallel to the rotating lead screw 1252. In practical applications, when the motor 1251 drives the rotating lead screw 1252 to rotate, the sliding member 123 slides on the guide column 1223 and drives the two connecting rods 124 to swing synchronously, thereby driving the pivot bracket 121 to rotate relative to the backrest frame 110.

[0091] It should be noted that the shoulder adjustment mechanism 120 provided in this embodiment has a fixed bracket 122 that can be fixedly connected to either the backrest frame 110 or the pivot bracket 121. Similarly, when the fixed bracket 122 is fixedly connected to the backrest frame 110, the end of the connecting rod 124 away from the sliding member 123 is pivotally connected to the pivot bracket 121; when the fixed bracket 122 is fixedly connected to the pivot bracket 121, the end of the connecting rod 124 away from the sliding member 123 is pivotally connected to the backrest frame 110.

[0092] The shoulder adjustment mechanism 120 provided in this embodiment also includes a gap elimination component 129. The gap elimination component 129 is disposed between the fixed bracket 122 and the sliding member 123, and continuously applies a force to the sliding member 123 so that the sliding member 123 can maintain contact with the guide column 1223, preventing the sliding member 123 from undergoing relative displacement in the radial direction of the guide column 1223, which would cause the sliding member 123 to wobble during the sliding process.

[0093] Preferably, in this embodiment, the guide pin 1223 has a circular cross-section, and there are multiple guide pins 1223 arranged side by side with intervals. The multiple guide pins 1223 together guide and limit the sliding member 123, ensuring that the sliding member 123 can perform smooth and stable linear movement, thereby ensuring that the pivot bracket 121 can rotate smoothly and stably relative to the backrest frame 110.

[0094] Fourth embodiment Please refer to the following: Figure 30 , Figure 31 and Figure 32 , Figure 30 The diagram shown is a partial structural schematic of the car seat 100 provided in this embodiment. Figure 31 As shown Figure 30 A partial structural diagram of the shoulder adjustment mechanism 120. Figure 32 As shown Figure 31 A schematic diagram of the connection structure between the drive component 125 and the slider 123.

[0095] Compared to the first and second embodiments, the shoulder adjustment mechanism 120 in this embodiment differs in that the drive assembly 125 includes a turbine motor assembly 1253 and a fixed lead screw 1254. The fixed lead screw 1254 is fixedly connected to the fixed bracket 122 and extends in a vertical plane. The turbine motor assembly 1253 is sleeved on the fixed lead screw 1254 and threadedly engaged with it. The sliding member 123 is fixedly connected to the turbine motor assembly 1253, and the turbine motor assembly 1253 is configured to move along the fixed lead screw 1254 to drive the sliding member 123 to slide relative to the fixed bracket 122.

[0096] The turbine motor assembly 1253 may include a drive motor, a worm gear, a turbine, and a rotating nut. The shaft of the drive motor extends into the housing and connects to the worm gear. The worm gear meshes with the turbine, and the output end of the turbine is connected to the rotating nut. The rotating nut is threadedly engaged with the fixed lead screw 1254. When the drive motor drives the worm gear to rotate, the turbine drives the rotating nut to rotate around the fixed lead screw 1254, thereby causing the entire turbine motor assembly 1253 to move linearly along the fixed lead screw 1254. This, in turn, causes the sliding member 123 to slide on the fixed bracket 122, so as to drive the pivot bracket 121 to rotate relative to the backrest frame 110 through the connecting rod 124.

[0097] Similarly, the shoulder adjustment mechanism 120 provided in this embodiment has a fixed bracket 122 that can be fixedly connected to either the backrest frame 110 or the pivot bracket 121. Furthermore, it can also employ a sliding engagement between the guide column 1223 and the sliding member 123, as in the third embodiment.

[0098] In summary, the shoulder adjustment mechanism 120 provided in this application has the characteristics of simpler structure, higher reliability, larger shoulder adjustment angle, better load-bearing capacity and longer service life.

[0099] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A car seat, characterized in that, The backrest frame (110) and shoulder adjustment mechanism (120) are included. The shoulder adjustment mechanism (120) includes a pivot bracket (121), a fixed bracket (122), a slider (123), a connecting rod (124), and a drive assembly (125). The pivot bracket (121) is pivotally connected to the backrest frame (110), and the fixed bracket (122) is fixedly connected to one of the backrest frame (110) and the pivot bracket (121). The sliding member (123) is slidably engaged with the fixed bracket (122), and one end of the connecting rod (124) is pivotally connected to the sliding member (123), and the other end is pivotally connected to the other of the backrest frame (110) and the pivot bracket (121); The drive assembly (125) is connected to the slider (123) and is configured to drive the slider (123) to slide relative to the fixed bracket (122) so as to drive the pivot bracket (121) to rotate via the connecting rod (124).

2. The car seat according to claim 1, characterized in that, The drive assembly (125) includes a motor (1251) and a rotating lead screw (1252). The motor (1251) is fixedly connected to the fixed bracket (122), and the rotating lead screw (1252) is connected to the motor (1251) in a transmission connection. The sliding member (123) is sleeved on the rotating screw (1252) and threadedly engaged with the rotating screw (1252); the rotating screw (1252) is configured to rotate under the drive of the motor (1251) so as to drive the sliding member (123) to slide along the rotating screw (1252).

3. The car seat according to claim 1, characterized in that, The drive assembly (125) includes a turbine motor assembly (1253) and a fixing screw (1254). The fixing screw (1254) is fixedly connected to the fixing bracket (122). The turbine motor assembly (1253) is sleeved on the fixing screw (1254) and threadedly engaged with the fixing screw (1254). The sliding member (123) is fixedly connected to the turbine motor assembly (1253), which is configured to move along the fixed lead screw (1254) to drive the sliding member (123) to slide along the fixed lead screw (1254).

4. The car seat according to claim 1, characterized in that, The fixed bracket (122) has a groove (1221), and the sliding member (123) and the connecting rod (124) are respectively located on opposite sides of the groove (1221); The shoulder adjustment mechanism (120) also includes a pivot assembly passing through the slide (1221), and the connecting rod (124) is pivotally connected to the slider (123) through the pivot assembly.

5. The car seat according to claim 4, characterized in that, The number of the slide groove (1221), the connecting rod (124) and the pivot assembly are all two, the two slide grooves (1221) are arranged side by side and spaced apart, and the sliding member (123) is located between the two slide grooves (1221); The two connecting rods (124) are located on opposite sides of the two slides (1221) and are pivotally connected to the opposite sides of the slider (123) via the two pivot assemblies.

6. The car seat according to claim 4, characterized in that, The pivot assembly includes a first bushing (126) and a stepped bolt (127). The connecting rod (124) has a pivot hole through it. The first bushing (126) is fitted into the pivot hole. The stepped bolt (127) passes through the first bushing (126) and the slide groove (1221) in sequence and is threadedly connected to the sliding member (123).

7. The car seat according to claim 6, characterized in that, The shoulder adjustment mechanism (120) further includes a second bushing (128), which is fitted inside the slide groove (1221) or on the step bolt (127).

8. The car seat according to claim 1, characterized in that, The fixed bracket (122) is provided with a guide column (1223), and the sliding member (123) is sleeved on the guide column (1223) and slides in cooperation with the guide column (1223).

9. The car seat according to claim 1, characterized in that, The shoulder adjustment mechanism (120) further includes a gap elimination component (129), which includes a self-lubricating element (1291) and an elastic element (1292). One end of the elastic element (1292) abuts against the sliding element (123), and the other end abuts against the self-lubricating element (1291) to press the self-lubricating element (1291) against the fixed bracket (122), while continuously applying an elastic force perpendicular to the sliding direction of the sliding element (123) to the sliding element (123).

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