Seat position adjusting device with improved assembly

Abstract

The present invention relates to a seat position adjustment device with improved assemblability, in which assemblability is improved and weight is reduced by individually changing the form of a placement portion and a gear portion and improving a coupling structure, the seat position adjustment device with improved assemblability comprising: a drive portion including a motor having a drive shaft formed therein; a gear part having a curved surface part formed on the outside thereof and coupled to the drive shaft in a gear connection manner, the curved surface part extending in a direction of rotation with respect to a first shaft extending to both sides; a rod part which penetrates through the gear part and is combined with the gear part in a manner of receiving the power of the driving shaft and moving forwards or backwards; and a placement portion in which a portion of an upper end of a curved plate structure for surrounding the curved surface portion surrounds the rod portion respectively in front of and behind the gear portion and forms a through-hole, the length of the upper and lower portions of the through-hole being longer with respect to the thickness of the upper and lower portions of the rod portion, and the placement portion being fixed to the gear portion. A seat connected with the rod part moves along with the movement of the rod part.

Description

Technical Field

[0001] The contents disclosed in this specification relate to a seat position adjustment device, and more specifically, the present invention relates to a seat position adjustment device for a vehicle seat with improved fitability. Background Technology

[0002] Unless otherwise stated in this specification, the content described in the identification items is not prior art to the claims of this application, and its inclusion in the identification items does not imply that it is prior art.

[0003] Typically, a vehicle seat consists of a seat cushion fixed to the bottom of the vehicle interior to support the passenger's load and a seat back that supports the passenger's upper body. A seat frame is installed inside the seat cushion and seat back.

[0004] The vehicle seat is raised or lowered by a vehicle seat height adjustment device fixed to the vehicle or track, which is located at the bottom of the seat. The vehicle seat position adjustment device is fixed to the vehicle or track in a manner that allows it to rotate as the seat moves.

[0005] Existing vehicle seat position adjustment devices are manufactured with the following structure: the drive unit is fixed to the vehicle or track by assembling a housing bracket and a rotating bracket that are coupled with a drive unit shaft including a guide screw, and the drive unit and rotating bracket rotate as the drive unit operates.

[0006] However, existing seat position adjustment devices are installed in vehicles by assembling brackets, which has the following disadvantages: increased assembly time, increased manufacturing costs due to the weight of multiple brackets, and deterioration of the vehicle's fuel efficiency or energy efficiency.

[0007] Therefore, in order to improve the ease of manufacturing of seat position adjustment devices and enhance the fuel efficiency of vehicles equipped with seat position adjustment devices, it is necessary to improve the assemblability of seat position adjustment devices and reduce their weight.

[0008] Relatedly, Korean Patent Publication No. 10-0885096 discloses a height adjustment device for automobile seats, and Korean Patent Publication No. 10-2014-0066582 discloses an electric seat height adjustment drive unit for vehicles.

[0009] However, there are no publicly disclosed technologies for improving the assemblability and lightweighting of seat position adjustment devices.

[0010] Existing technical documents

[0011] Patent documents

[0012] (Patent Document 1) Korean Patent Publication No. 10-0885096

[0013] (Patent Document 2) Korean Patent Publication No. 10-2014-0066582 Summary of the Invention

[0014] The problem that the invention aims to solve

[0015] The aim is to provide a seat position adjustment device with improved assemblability by changing the shape of the placement part and gear part and improving the connection structure to improve assemblability and reduce weight.

[0016] Furthermore, the present invention is not limited to the technical problems described above, and it will be apparent that other technical problems can be derived from the following description.

[0017] Solution for solving the problem

[0018] According to one embodiment of the disclosed content, the improved seat position adjustment device includes: a drive unit including a motor having a drive shaft; a gear unit having a curved surface formed on its outer side and engaging with the drive shaft in a gear-like manner, the curved surface extending along a direction of rotation based on a first axis extending to both sides; a rod unit passing through the gear unit and engaging with the gear unit in a manner that receives power from the drive shaft to move forward or backward; and a placement unit in which a portion of the upper end of a curved plate structure for surrounding the curved surface surrounds the rod unit in front of and behind the gear unit, and each forms a through hole, the upper and lower lengths of the through holes being longer than the upper and lower thicknesses of the rod unit. When the placement unit is fixed, the seat connected to the rod unit moves with the movement of the rod unit.

[0019] Furthermore, the aforementioned placement portion can be formed into a large arc shape and closely adhere to the aforementioned curved surface, so as to engage with the aforementioned gear portion in a manner that allows it to slide along the direction of rotation based on the aforementioned first axis.

[0020] Additionally, the gear portion may include: a housing having a plurality of ribs forming the curved surface on its outer side, and a hollow portion having an internal space open to the outside at the front and rear of the housing to allow the rod portion to pass through; and a protrusion protruding from the lower part of the housing.

[0021] Furthermore, in the aforementioned placement portion, a portion of the placement portion corresponding to the path along which the protrusion rotates about the first axis during the movement of the aforementioned seat is recessed to form a groove for the protrusion to be inserted.

[0022] Furthermore, in the aforementioned placement portion, a portion of one side of the placement portion is recessed toward the aforementioned groove to form a slot that connects with the aforementioned groove.

[0023] Furthermore, in the aforementioned placement part, the inner edge of one side of the placement part can be processed into a cone shape to form an inclined surface.

[0024] Furthermore, the aforementioned gear portion may also include: a worm gear, which engages with the aforementioned drive shaft in the aforementioned space; and a gear nut, in the aforementioned space, the inner surface of the gear nut being threadedly engaged with the aforementioned rod portion, and the outer surface of the gear nut being gearedly engaged with the aforementioned worm gear.

[0025] Invention Effects

[0026] According to an embodiment disclosed in this specification, unlike previous inventions, in the seat position adjustment device with improved assemblability, the gear part and the placement part are connected by a slot-type connection, so there is no need to use brackets and rivets for the connection between the gear part and the placement part, thereby having the advantage of reducing the overall weight.

[0027] Furthermore, unlike in the past, in the seat position adjustment device with improved assembly, the placement part is formed in a shape that surrounds and closely adheres to the outer part of the gear part, thereby having the advantages of reducing the weight of materials used in manufacturing and facilitating the assembly between the gear part and the placement part.

[0028] Furthermore, unlike in the past, in the improved seat position adjustment device, the outer part of the gear is rotatably connected to the placement part by fitting it tightly against the inner side of the placement part. Therefore, it has the advantage of not needing to use rivets to rotate and connect the placement part and the gear.

[0029] In addition, the placement part is made of a bent plate-shaped material to form a bearing support shape with an opening at the top. Therefore, the material volume is minimized, the material is easy to process, and the cross-sectional thickness of the placement part around the gear part is uniform, thus improving the weight reduction effect.

[0030] Furthermore, the effects of the present invention described above are independent of whether the inventor was aware of them; they arise naturally from the composition of the described content. Therefore, the above effects are merely a few effects based on the described content and cannot be considered as describing all effects that are known to the inventor or actually exist. Moreover, the effects of the present invention should be further understood through the entire description. Even if not explicitly stated, any effect that can be recognized by a person skilled in the art based on this description should be considered an effect described in this description. Attached Figure Description

[0031] Figure 1 This is a perspective view of an assembly-improved seat position adjustment device according to an embodiment of this specification.

[0032] Figure 2and Figure 3 It is a different perspective. Figure 1 An exploded perspective view of the seat position adjustment device with improved assembly.

[0033] Figure 4 and Figure 5 It is Figure 1 An exploded perspective view of a portion of the seat position adjustment device with improved assembly.

[0034] Figure 6 It is cut along I-I' Figure 1 A cross-sectional view of the improved seat position adjustment device.

[0035] Figure 7 and Figure 8 It shows that in the setting Figure 1 A schematic diagram showing the various states in which the seat position adjustment device with improved assembly is driven.

[0036] Figure 9 It is shown that it includes Figure 1 A perspective view of another embodiment of the placement part in the seat position adjustment device with improved assembly.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100: Seat position adjustment device with improved assembly.

[0039] 200: Drive Unit

[0040] 400: Gear section

[0041] 600: Placement Section

[0042] 800: Bar section. Detailed Implementation

[0043] Hereinafter, the configuration, operation, and effects of the seat position adjustment device with improved assemblability according to the preferred embodiment will be described with reference to the accompanying drawings. For reference, in the following drawings, for convenience and clarity, each component is omitted or briefly shown, and the size of each component does not reflect its actual size. Furthermore, throughout the specification, the same reference numerals refer to the same components, and reference numerals for the same configuration are omitted in individual drawings.

[0044] Reference Figures 1 to 8 The improved seat position adjustment device 100 includes a drive unit 200, a gear unit 400, a placement unit 600, and a lever unit 800.

[0045] The improved seat position adjustment device 100 is combined with a linkage connected to the seat of the vehicle. When driven by the drive unit 200, the linkage 800 is reciprocated by the drive unit 200 to raise or lower the seat.

[0046] When the seat position adjustment device 100, which has improved fit as the lever 800 moves, is moved to different horizontal lines by the linkage or the seat, the drive unit 200 and gear unit 400, except for the placement unit 600, rotate by a predetermined angle corresponding to the height of the lever 800.

[0047] Reference Figures 2 to 4 The drive unit 200 includes a motor 220, a drive control unit 240, and a drive shaft 260.

[0048] The drive unit 200 is attached to one side of the gear unit 400. Driven by the motor 220, the drive shaft 260 rotates based on the shaft extending to both sides, thereby transmitting power to the gear unit 400.

[0049] Specifically, the motor 220 is formed as a cylindrical shape that extends long to both sides, and rotates the drive shaft 260 by the operation of the user, and is connected to the gear unit 400 by the drive control unit 240 connected to the other side.

[0050] The drive control unit 240 has a built-in motor drive circuit. The motor drive circuit receives control signals from the outside through user operation and generates drive signals for the motor 220 to drive the motor 220.

[0051] The drive shaft 260 is formed as a cylinder extending a predetermined distance from the drive control unit 240 to the other side, and rotates in the forward or reverse direction with the extension direction as the axis driven by the motor 220.

[0052] Reference Figure 2 and Figure 3 The gear part 400 includes a housing 420, a worm gear 440, a gear nut 460, a first support member 462 and a second support member 464, and the housing 420 includes a body 422, a cover 424 and a protrusion 428.

[0053] The gear portion 400 has a curved surface 410 on its lower outer side that extends in a direction of rotation based on the first shaft 10 extending in a lateral direction. It is connected to the drive shaft 260 gear inserted inside and transmits the rotational power of the drive shaft 260 to the rod portion 800.

[0054] Specifically, refer to Figure 2 and Figure 3One side of the housing 420 is combined with the drive control unit 240, and the other side of the housing 420 is manufactured in the form of a shell covering the worm gear 440 and the gear nut 460. A first hollow part 430 and a second hollow part 432 are formed at the rear and front to communicate the first internal space 1 with the outside.

[0055] The lower end of the outer casing 420 is formed into a cylindrical shape that extends longer to both sides, and the upper end of the other side is formed into a shape in which the upper part of the lower end protrudes upward by a predetermined distance and extends longer to both sides.

[0056] Reference Figures 2 to 6 The main body 422 includes a first housing 422a, a second housing 422b, a guide member 422c, a first rib 422d, a second rib 422e, a third rib 422f, and a reinforcing member 422j.

[0057] Specifically, one side of the main body 422 is formed as a shell shape and covers the other side of the drive control unit 240. The lower end of the other side is made into a pillar shape that extends toward the other side at a predetermined distance. The upper end of the other side is made into a semi-cylindrical shape in which the upper part of the lower end protrudes and extends to both sides.

[0058] The first space 1 formed inside the lower end of the other side of the main body 422 is manufactured to open to the outside space from the front of the lower end of the other side of the main body 422. The gear nut 460, the first support member 462 and the second support member 464 are inserted into the first space 1.

[0059] Reference Figure 1 and Figure 6 The upper end of the other side of the main body 422 is disposed in the opening 605 when the gear part 400 and the placement part 600 are engaged. When the drive part 200 and the gear part 400 move excessively with reference to the first shaft 10, the movement is restricted by the brackets 640 and 660 respectively disposed behind and in front of the opening 605.

[0060] Therefore, it has the following advantages: in the event of a problem with the threaded connection between the gear part 400 and the rod part 800, and the seat lifting control fails, the upper end of the other side of the main body 422 will collide with either of the brackets 640 and 660, thereby preventing the seat from lifting or lowering excessively.

[0061] Reference Figure 3 The first hollow portion 430 is made in such a way that a portion of the lower end of the other side of the body 422 is recessed forward by a predetermined distance, so that the first space 1 communicates with the rear external space of the body 422 and provides a channel function for the lead screw 820 to be inserted into the first space 1.

[0062] Reference Figure 2 The second hollow portion 432 is made in such a way that a portion of the front of the cover 424 is recessed to the rear by a predetermined distance, such that the rear side space of the cover 424 is connected to the front side external space of the cover 424.

[0063] Reference Figure 2 , Figure 3 and Figure 6 The first housing 422a is formed as a box shape with the internal space open to one side, and is attached to the other side of the drive control unit 240 to cover the drive control unit 240.

[0064] Reference Figure 2 , Figure 3 and Figure 6 The lower end of the second shell 422b is formed in a hexahedral shape with the first internal space 1 facing forward. The upper end is made into a semi-cylindrical shape with the upper part of the lower end protruding upward and extending to both sides. A second space 2 communicating with the first space 1 is formed inside.

[0065] Reference Figure 3 The first hollow portion 430 is configured such that a portion located at the rear of the second housing 422b is recessed forward by a predetermined distance, so that the first space 1 communicates with the rear side external space of the second housing 422b, and serves as a channel for inserting the lead screw 820 into the first space 1.

[0066] Reference Figure 3 The guide member 422c is formed in an annular shape around the opening of the first hollow portion 430 formed at the rear of the second housing 422b, and is connected or combined to the rear of the second housing 422b. It guides the guide screw 820 inserted into the first hollow portion 430 and the first space 1 to rotate while being able to move in the forward and backward direction.

[0067] Specifically, the guide member 422c is formed into a ring shape around the opening of the first hollow portion 430, and its rear is machined to form a first curved surface extending in a direction of rotation based on the first axis 10.

[0068] Reference Figure 3 Multiple first ribs 422d are each manufactured in an arc-shaped (circular segment) form that extends long in the upward and downward direction and protrudes backward. They are arranged at a predetermined distance from each other on the same horizontal line on both sides of the guide member 422c and are combined with the second housing 422b.

[0069] A first connecting rib is formed between the multiple first ribs 422d to connect the multiple first ribs 422d, thereby improving durability. The first connecting rib suppresses the deformation of the first ribs 422d during the rotation of the gear part 400 in the first rotation space 20 inside the placement part 600.

[0070] The rear outer surfaces of the multiple first ribs 422d are in close contact with the inner surface of the placement portion 600 in the first rotation space 20, and together with the back of the guide member 422c, they form part of the curved surface 410. The curved surface 410 guides the gear portion 400 to rotate stably in the first rotation space 20 with the first shaft 10 as a reference.

[0071] Reference Figure 3 and Figure 4 Multiple second ribs 422e are each manufactured in a circular segment shape that extends long in the front-back direction and protrudes downwards. They are attached to the lower part of the second housing 422b in a state where they are arranged from one side to the other at a predetermined distance on the same horizontal line.

[0072] Multiple second ribs 422e are interconnected by second connecting ribs that extend to both sides, thereby improving durability. The second connecting ribs suppress deformation of the second ribs 422e during the rotation of the gear part 400 in the first rotation space 20.

[0073] Reference Figure 2 Multiple third ribs 422f are each manufactured in a circular segment shape that extends long in the front-back direction and protrudes upwards. They are attached to the upper part of the second shell 422b in a state where they are arranged from one side to the other at a predetermined distance on the same horizontal line.

[0074] Reference Figure 5 The locking groove 422g is formed by recessing a portion of one side of a quadrilateral shape corresponding to the lower side of one side of the second housing 422b toward the other side by a predetermined distance, and a portion of the cover 424 is inserted into the locking groove 422g.

[0075] Reference Figure 2 The locking groove 422i is formed by recessing a portion of the other side of a quadrilateral shape corresponding to the upper part of the other side of the second housing 422b to one side by a predetermined distance. A portion of the cover 424 is inserted into the locking groove 422i and engages with the second housing 422b through the locking flange.

[0076] Reference Figure 5 The insertion groove 422h is formed by a portion of the front side of the second housing 422b, which is located on the same horizontal line as the locking groove 422g, being recessed rearward by a specified distance, and is connected to the locking groove 422g.

[0077] Reference Figure 5 The reinforcing member 422j is manufactured in a rib shape that connects one bottom surface of the second housing 422b and the first housing 422a to each other, and partially covers one side of the insertion groove 422h, thereby suppressing the phenomenon that the engagement between the locking member 424d inserted into the insertion groove 422h and the second housing 422b through the locking flange is released.

[0078] Reference Figures 2 to 5 The cover 424 includes a cover body 424a, a guide member 424b, a fourth rib 424c, and locking members 424d and 424e.

[0079] The front of the cover 424 protrudes forward in a convex shape, and a curved surface extending along the rotation direction of the body 422 is formed at the front. A central portion of the front of the cover 424 is recessed backward, thereby forming a second hollow portion 432 that connects the front and rear external spaces.

[0080] The cover 424 is attached to the front of the lower end of the other side of the main body 422 and covers the front of the first space 1. It fixes the gear nut 460, the first support member 462 and the second support member 464. During the rotation of the gear part 400, it is in close contact with the inner side of the placement part 600 and guides the rotation of the gear part 400.

[0081] Specifically, refer to Figures 3 to 5 The cover body 424a is formed as a quadrilateral plate with a protrusion of the same shape as the second support member 464 at the rear, so that it is in close contact with the front of the second shell 422b surrounding the first space 1 and the second support member 464 and covers the front of the first space 1.

[0082] The guide member 424b is formed in an annular shape around the front opening of the second hollow portion 432 and connected to the front of the cover body 424a. The front of the guide member 424b is machined to form a second curved surface extending along the direction of rotation based on the first axis 10.

[0083] Multiple fourth ribs 424c are respectively manufactured on both sides of the guide member 424b in an arc shape that extends long in the upward and downward direction and protrudes forward, and are attached to the front of the cover body 424a in a state of being spaced apart from each other at a predetermined distance on the same horizontal line.

[0084] The first curved surface of the guide member 422c, the second curved surface of the guide member 424b, the first rib 422d, the second rib 422e and the fourth rib 424c described above constitute the curved surface 410, which is a curved surface shape with a large bow-shaped arc.

[0085] The curved surface 410 is in close contact with the inner side of the placement part 600, stably guiding the rotation of the gear part 400 inserted into the first rotation space 20, and has the advantage of improving the durability of the gear part 400.

[0086] On the other hand, the curved surface 410 can be formed by a first rib 422d, a second rib 422e, and a fourth rib 424c, in addition to the guide members 422c and 424b. In this case, the outer curved surfaces of the guide members 422c and 424b can be recessed and separated from the inner surface of the placement portion 600.

[0087] The inner edges of the guide components 422c and 424b are machined into a tapered shape with the inner diameter gradually increasing toward the first space 1, thereby forming an inner inclined surface. In this case, the inner inclined surface formed on the guide components 422c and 424b has the advantage of guiding the smooth movement of the guide screw 820.

[0088] With the gear part 400 and the placement part 600 engaged, the outer surfaces of the first curved surface of the guide member 422c, the second curved surface of the guide member 424b, the first rib 422d, the second rib 422e, and the fourth rib 424c are in close contact with the inner surface of the placement part 600.

[0089] With the gear part 400 inserted into the first rotation space 20, the first curved surface, the second curved surface, the first rib 422d, the second rib 422e, and the fourth rib 424c are in close contact with the inner side of the placement part 600. During the rotation of the gear part 400, the first curved surface, the second curved surface, the first rib 422d, the second rib 422e, and the fourth rib 424c remain in close contact with the placement part 600.

[0090] Reference Figure 5 One end of the locking member 424d is formed into a rod extending forward and backward and is connected to a position corresponding to the rear and lower part of one side of the cover body 424a. A portion of the other end protrudes a predetermined distance to the other side to form a first locking flange.

[0091] During the process of joining the body 422 and the cover 424 together, the locking component 424d moves backward a predetermined distance and is inserted into the insertion groove 422h, and the first locking flange is inserted into the locking groove 422g.

[0092] During the process of the locking component 424d being inserted into the insertion groove 422h and moving backward, the first locking flange is in a state of elastic movement to one side. When the first locking flange moves to the locking groove 422g, the first locking flange elastically moves to the other side and is inserted into the locking groove 422g.

[0093] With the body 422 and the cover 424 engaged, the first locking flange is inserted into the locking groove 422g formed on one side of the body 422 by the elastic restoring force of the locking member 424d, thereby increasing the bonding force between the body 422 and the cover 424.

[0094] Reference Figures 2 to 4 One end of the locking member 424e is formed into a rod extending forward and backward, and is connected to a position corresponding to the rear and upper part of the other side of the cover body 424a. A portion of the other end protrudes to one side by a predetermined distance to form a second locking flange.

[0095] With the body 422 and the cover 424 engaged, the second locking flange is inserted into the locking groove 422i formed on the other side of the body 422 by the elastic restoring force of the locking member 424e, thereby increasing the bonding force between the body 422 and the cover 424.

[0096] Reference Figures 2 to 4 The protrusion 428 protrudes downward from the center of the second rib 422e, which is located at a position separated from one side of the second housing 422b by a first separation distance, and is formed in a hexahedral shape.

[0097] The protrusion 428 is configured to be closer to one side of the second housing 422b than the other side of the second housing 422b, and is inserted into the slide groove 624 through the slot 623 during the process of the second housing 422b being inserted from one side of the placement portion 600 into the first rotation space 20.

[0098] With the protrusion 428 inserted into the groove 624, a portion of the protrusion 428 protrudes a predetermined distance toward the lower part of the placement part 600, guiding the rotation direction of the drive part 200 and the gear part 400 and preventing the gear part 400 from separating from the placement part 600.

[0099] Reference Figure 2 , Figure 3 and Figure 6 The worm gear 440 is manufactured such that one end is connected to the other end of the drive shaft 260 in the second space 2, and the other end extends a specified distance from one end toward the other.

[0100] The thread formed on the outside of the worm 440 is manufactured to extend helically from the outer side of one end of the worm 440 while rotating counterclockwise when viewed from one side.

[0101] Reference Figure 2The gear nut 460 is formed in a cylindrical shape around a through hole 465 extending from the first space 1 in the forward and backward direction. A thread is formed on the inner side of the through hole 465, and a plurality of teeth are arranged on the outer side. The plurality of teeth are arranged at equal distances from each other along the outer side of the gear nut 460.

[0102] The teeth formed on the outside of the gear nut 460 mesh with the threads formed on the worm 440 at the lower part of the worm 440. When the drive shaft 260 and the worm 440 rotate forward or backward, the gear nut 460 rotates forward or backward with reference to the shaft extending forward and backward.

[0103] The thread formed on the inner side of the gear nut 460 is manufactured in a shape that rotates clockwise from the rear inner side of the gear nut 460 and extends spirally toward the front of the gear nut 460, and is engaged with the inner side of the gear nut 460 in the through hole 465.

[0104] The first support member 462 is formed in the shape of a four-corner washer and surrounds a portion of the rear of the gear nut 460. The outer side of the member located at the edge is in close contact with the inner side of the second housing 422b in the first space 1 and is fixed to the second housing 422b.

[0105] The second support member 464 is formed in the shape of a four-corner washer and surrounds the front part of the gear nut 460. The outer side of the member located at the edge is in close contact with the inner side of the second housing 422b in the first space 1 and is fixed to the second housing 422b.

[0106] The gear nut 460 is disposed in the first space 1 between the first support member 462 and the second support member 464. When the worm gear 440 rotates forward or backward, its position is fixed on the same horizontal and vertical lines by the first support member 462 and the second support member 464.

[0107] When viewing the drive unit 200 from one side, if the drive shaft 260 rotates clockwise as the positive rotation direction, the worm gear 440 rotates in the positive direction. When viewing the gear nut 460 from the rear, the gear nut 460 rotates clockwise in the positive direction.

[0108] When the gear nut 460 rotates clockwise while rotating forward, the guide screw 820 moves backward a predetermined distance in proportion to the rotation of the drive shaft 260, and the seat connected to the guide screw 820 lowers or rises.

[0109] Conversely, when viewing the drive unit 200 from one side, if the drive shaft 260 rotates counterclockwise as the reverse rotation direction, the worm gear 440 rotates in the opposite direction. When viewing the gear nut 460 from the rear, the gear nut 460 rotates counterclockwise.

[0110] When the gear nut 460 rotates in the opposite direction and turns counterclockwise, the guide screw 820 moves forward a predetermined distance in proportion to the rotation of the drive shaft 260, and the seat connected to the guide screw 820 lowers or rises.

[0111] Based on the connection structure between the seat and the improved seat position adjustment device 100, the seat movement direction can be downward or upward depending on the forward movement direction of the guide screw 820.

[0112] Furthermore, based on the connection structure between the seat and the improved seat position adjustment device 100, the seat movement direction can be downward or upward depending on the rearward movement direction of the guide screw 820.

[0113] Reference Figures 1 to 4 The placement part 600 includes a guide 620 and brackets 640 and 660.

[0114] The placement portion 600 is formed in a shape surrounding the curved surface 410 formed on the gear portion 400, and is engaged with the gear portion 400 in a manner that allows it to rotate along the first axis 10. A first through hole 621 and a second through hole 622 are formed by recessing a portion of the gear portion 400 at the rear and front, respectively, which are separated from each other.

[0115] The lower end of the placement part 600 is made to bend the plate extending forward and backward into a large bow-shaped arc protruding downward to surround the first rotation space 20, and an opening 605 is formed on the upper part, with the inner side closely attached to the curved surface 410.

[0116] The lower end and upper end of the placement part 600 are positioned at the rear and front respectively, on a horizontal line that is relatively higher than the first shaft 10, separated by the opening 605, so that the placement part 600 inserted into the first rotation space 20 can be stably fixed.

[0117] Specifically, the guide 620 is manufactured in the form of a curved surface 410 formed on the lower end of the other side of the housing 420, with its inner surface in close contact with the guide member 422c, the first rib 422d, the second rib 422e, the guide member 424b, and the fourth rib 424c.

[0118] The first through hole 621 is formed by a portion of the back center of the guide 620 being recessed forward by a predetermined distance, thereby communicating the first rotation space 20 for inserting the second housing 422b with the rear external space of the guide 620.

[0119] The second through hole 622 is formed by recessing a portion of the front center of the guide 620 backward by a predetermined distance, thereby connecting the first rotation space 20 with the front side external space of the guide 620.

[0120] With the lower end of the outer casing 420 inserted into the first rotation space 20, the first through hole 621 communicates with the first hollow portion 430 formed in the second casing 422b, and the second through hole 622 communicates with the second hollow portion 432.

[0121] The lead screw 820 is threaded into the gear nut 460 while passing through the first through hole 621, the first hollow part 430, the through hole 465, the second hollow part 432 and the second through hole 622, and moves forward or backward according to the rotation direction of the drive shaft 260.

[0122] The slot 623 is made in such a way that a portion of one side of the guide 620 located at the lower part of the first rotation space 20 is recessed to the other side by a predetermined distance and communicates with the slide 624, so that the first rotation space 20 communicates with the lower external space of the guide 620.

[0123] Specifically, the slot 623 is made in such a way that, when the seat is located on a horizontal line corresponding to the maximum height or a horizontal line corresponding to the minimum height, a portion of one side of the guide 620, which is located on a horizontal line relatively higher than the horizontal line where the protrusion 428 is located, is recessed to the other side by a predetermined distance and communicates with the slide 624.

[0124] The length of the slot 623 is made relatively smaller than the distance between the other side of the guide 620 and the slide 624, and relatively smaller than the length of the slide 624. This reduces the volume corresponding to a portion of the guide 620 that needs to be removed to process the slot 623 and the slide 624, thereby improving the durability of the guide 620.

[0125] With the placement part 600 positioned and fixed apart from the seat, the slot 623 is always positioned at a horizontal line that is relatively higher than the protrusion 428, regardless of the position of the protrusion 428 which rotates with respect to the first axis 10 as the seat rises and falls. This prevents the protrusion 428 from moving toward the slot 623 due to external force, and has the advantage of stable engagement between the gear part 400 and the placement part 600.

[0126] Furthermore, since the assembly between the gear 400 and the placement part 600 is completed with the protrusion 428 inserted into the slide 624, there is no need to use connecting parts including rivets, which has the advantage of reducing the weight of the housing 420.

[0127] On the other hand, the slot 623 can be manufactured such that a portion of the upper part of one side of the guide 620 located in the lower part of the first rotation space 20 is recessed to the other side by a predetermined distance to communicate with the slide 624 and be isolated from the lower external space of the guide 620.

[0128] The groove 624 is formed in such a way that a portion of the guide 620 is recessed, corresponding to the path of the protrusion 428 during the period when the seat moves the maximum distance during the raising or lowering of the seat, so that the first rotation space 20 is connected to the lower outer space of the guide 620.

[0129] The distance between one side of the guide 620, which is on the same horizontal line as the slide 624, and the slide 624 is relatively smaller than the distance between the other side of the guide 620, which is on the same horizontal line as the slide 624, and the slide 624.

[0130] On the other hand, the groove 624 can be manufactured such that a portion of the inner side of the guide 620, corresponding to the path of the protrusion 428 during the period when the seat moves the maximum distance during the rising or falling of the seat, is recessed downward by a predetermined distance and is isolated from the lower external space of the guide 620.

[0131] When the slot 623 and slide 624 are manufactured in a form that isolates them from the lower external space of the guide 620, the bottom surface of the protrusion 428 is positioned on a horizontal line that is relatively higher than the bottom surface of the guide 620 when it is inserted into the slot 623 or slide 624.

[0132] If the placement part 600 is rotated forward by a predetermined angle with the first shaft 10 as a reference, such that the first through hole 621 faces the rear and lower part, and the placement part 600 is moved to one side with the gear part 400 positioned on the other side of the placement part 600, then the protrusion 428 is inserted into the rear end of the slide groove 624 through the slot 623.

[0133] Furthermore, if the placement part 600 is rotated in the opposite direction by a predetermined angle with the first axis 10 as a reference, the first through hole 621 and the second through hole 622 are connected to each other on the same horizontal line through the first hollow part 430 and the second hollow part 432, and the protrusion 428 will be disposed in the center of the groove 624.

[0134] With the placement part 600 fixed to the seat or track, the rod part 800 passes through the gear part 400 and the placement part 600 and is threaded into the gear part 400. The rear end of the rod part 800 is rotated with a connecting rod connected to the seat based on an axis extending to both sides.

[0135] One end of the bracket 640 is formed as a vertical plate that extends long to both sides and is perpendicular to the ground, thereby connecting to the upper rear end of the guide 620, and the other end is manufactured such that the upper part of one end extends rearward by a predetermined distance.

[0136] One end of the bracket 660 is formed as a vertical plate that extends long to both sides and is perpendicular to the ground, thereby connecting to the upper front end of the guide 620, and the other end is manufactured such that the upper part of one end extends forward a predetermined distance.

[0137] An opening 605 communicating with the first rotation space 20 is formed between one end of the brackets 640 and 660. The upper end of the outer casing 420 is disposed in the opening 605, thereby allowing it to rotate forward or backward with the first axis 10 as a reference.

[0138] The placement part 600 is connected to the track, car body or seat frame of the vehicle via brackets 640 and 660. When the position of the rod part 800 changes due to the seat and connecting rod being raised and lowered by the drive part 200, the guide gear part 400 rotates stably with the first shaft 10 as a reference.

[0139] On the other hand, the second housing 422b can be inserted into the first rotation space 20 in an interference fit with the guide 620. At this time, the friction between the curved surface 410 and the inner surface of the guide 620 increases, thereby enabling stable rotation of the gear part 400.

[0140] The rod portion 800 includes a lead screw 820 and a nut 840.

[0141] Reference Figures 1 to 4 The rod portion 800 is formed into a rod shape that extends relatively far forward and backward, and is manufactured to be threadedly engaged with the gear portion 400 while passing through the first through hole 621, the gear portion 400 and the second through hole 622.

[0142] Specifically, refer to Figure 3 One end of the lead screw 820 is manufactured into a quadrilateral plate with a hole 822 passing through the center of both sides, and is rotatably coupled to the connecting rod or seat based on the axis extending to both sides.

[0143] The central part of the lead screw 820 is manufactured with threads on the outer surface of a cylinder extending forward and backward. When it extends forward a predetermined distance from one end and passes through the first through hole 621, the first hollow part 430, the through hole 465, the second hollow part 432 and the second through hole 622 in sequence, it is threadedly engaged with the threads formed on the inner surface of the gear nut 460.

[0144] The thread formed on the outer side of the central portion of the lead screw 820 is manufactured to extend a predetermined distance forward in a clockwise direction while rotating from the rear of the central portion of the lead screw 820 along the outer side of the lead screw 820.

[0145] Preferably, the length of the central portion of the guide screw 820 is manufactured to match the distance the guide screw 820 is to move during the seat's upward or downward movement between its maximum and minimum height.

[0146] The other end of the lead screw 820 is formed by protruding a cylindrical portion from the front center of the central part of the central part forward by a specified distance, and has threads formed on the outer side to engage with the nut 840.

[0147] The nut 840 is threadedly engaged with the other end of the guide screw 820 protruding forward of the placement part 600 at a position corresponding to the front of the placement part 600. If necessary, the guide screw 820 and the nut 840 can be welded together.

[0148] The nut 840 is manufactured such that the length between the opposite sides facing each other is greater than the diameter of the second hollow portion 432, and when the lead screw 820 moves excessively backward, the cover 424 prevents the rear of the nut 840 from moving, thereby preventing the lead screw 820 from separating from the gear nut 460.

[0149] The height of one end of the lead screw 820 is relatively greater than the diameter of the first hollow part 430. When the lead screw 820 moves forward excessively, the second housing 422b prevents one end of the lead screw 820 from moving forward, thereby preventing the lead screw 820 from separating from the gear nut 460 or from moving forward excessively.

[0150] When the drive shaft 260 and worm gear 440 rotate in the forward direction, when viewed from the rear, the gear nut 460 rotates clockwise in the forward direction, and the lead screw 820 moves backward a predetermined distance, causing the seat to lower or raise.

[0151] When the drive shaft 260 and the worm gear 440 rotate in opposite directions, when viewed from the rear, the gear nut 460 rotates counterclockwise, and the lead screw 820 moves forward a predetermined distance, causing the seat to lower or rise.

[0152] During the process of the guide screw 820 moving backward a predetermined distance, if the seat rises and one end of the guide screw 820 rises, then when viewing the drive unit 200 from one side of the drive unit 200, the drive unit 200 and the gear unit 400 rotate counterclockwise by a predetermined angle with the first shaft 10 as the reference.

[0153] During the forward movement of the guide screw 820 a predetermined distance, if the seat descends and one end of the guide screw 820 descends, when viewed from one side of the drive unit 200, the drive unit 200 and the gear unit 400 rotate clockwise by a predetermined angle with the first shaft 10 as the reference.

[0154] By controlling the drive unit 200, the rotation speed of the drive shaft 260 can be adjusted, thereby adjusting the distance the lead screw 820 moves forward or backward, thus preventing the protrusion 428 from moving into the slot 623 during rotation.

[0155] For example, during the rotation of the gear section 400 during the raising or lowering of the seat, the protrusion 428 only moves back and forth along the slide 624. During the rotation of the gear section 400, the slot 623 is always positioned at a relatively higher level than the protrusion 428, thus preventing the protrusion 428 from dislodging from the external space through the slot 623.

[0156] Therefore, during the lifting and lowering of the seat, the protrusion 428 only slides within the slide groove 624, preventing the protrusion 428 from disengaging into the external space via the slot 623. Thus, during the lifting and lowering drive of the seat, the gear part 400 and the placement part 600 are prevented from separating from each other.

[0157] Preferably, the length of the central portion of the guide screw 820 is manufactured to match the distance the guide screw 820 needs to move during the seat's upward or downward movement between its maximum and minimum height. In this case, when the seat is moved to its maximum or minimum height position, the movement of the guide screw 820 is restricted by the nut 840 or one end of the guide screw 820, thus preventing excessive seat height adjustment and achieving weight reduction.

[0158] Reference Figure 7 and Figure 8 The improved seat position adjustment device 100 can be combined with the vehicle's track 50 via the placement part 600, and the rod part 800 can be rotatably attached to the lower part of the first link 52 connected to the seat frame 60.

[0159] The track 50 is manufactured in a form that extends long in the front and back and is integrated into the vehicle frame. The seat frame 60 is integrated with the track 50 in a way that allows it to move up and down via the first link 52 and the second link 54.

[0160] Specifically, one end of the first link 52 is rotatably connected to one end of the lead screw 820 with respect to an axis extending to both sides. The central part of the first link 52 extends forward and upward at a predetermined distance and is rotatably connected to the track 50 with respect to an axis extending to both sides. The other end extends backward and upward at a predetermined distance and is rotatably connected to the seat frame 60 with respect to an axis extending to both sides.

[0161] One end of the second link 54 is rotatably coupled to the track 50 in front of the first link 52 with reference to an axis extending to both sides, and the other end extends backward and upward at a predetermined distance with reference to an axis extending to both sides and is rotatably coupled to the seat frame 60.

[0162] Reference Figure 1 and Figure 7 (a) By reversing the rotation of the drive shaft 260, the lead screw 820 moves forward a predetermined distance, one end of the first link 52 descends in a forward and downward tilting direction, and the other end of the first link 52 and the seat frame 60 descend in a rearward and downward tilting direction.

[0163] At this time, the seat frame 60 is positioned in a first position corresponding to the lowest height of the seat, one end of the guide screw 820 is prevented from moving forward by the second housing 422b, and one end of the guide screw 820 is positioned on a horizontal line that is relatively lower than the first shaft 10 by the rotation of the drive unit 200 and the gear unit 400.

[0164] Reference Figure 7 (b) By rotating the drive shaft 260 in the forward direction, the lead screw 820 moves backward a predetermined distance, one end of the first link 52 rises in a direction that is inclined backward and upward, and the other end of the first link 52 and the seat frame 60 rise in a direction that is inclined forward and upward.

[0165] At this time, the seat frame 60 is positioned in a second position corresponding to a horizontal line that is relatively higher than the first position described earlier. The guide screw 820 and nut 840 are positioned at a location spaced apart from the placement part 600. In the accompanying drawings, the drive part 200 and the gear part 400 are... Figure 7 Compared to the drive unit 200 and gear unit 400 of (a), the first shaft 10 is referenced and rotated further in a clockwise direction by a predetermined angle.

[0166] Reference Figure 8 (c) By rotating the drive shaft 260 in the forward direction, the lead screw 820 and Figure 7 Compared to the lead screw 820 of (b), it moves further rearward by a predetermined distance, one end of the first link 52 rises in a rearward and upward tilting direction, and the other end of the first link 52 and the seat frame 60 rise in a forward and upward tilting direction.

[0167] At this time, the seat frame 60 is positioned in a third position, corresponding to a horizontal line that is relatively higher than the second position described earlier. The nut 840 is tightly fitted against the second housing 422b. In the accompanying drawings, the drive unit 200 and the gear unit 400 are... Figure 7 Compared to the drive unit 200 and gear unit 400 of (b), the first shaft 10 is rotated further clockwise by a predetermined angle.

[0168] like Figure 7 and Figure 8 As shown, the improved seat position adjustment device 100 can be fixed to the track 50, and the shape of the first link 52 can be changed according to the fixed position of the placement part 600.

[0169] In addition, the lever 800 of the seat position adjustment device 100 with improved assembly can be rotatably coupled to the seat frame 60 based on the axis extending to both sides, instead of the first link 52. In this case, the seat frame 60 can be raised or lowered by the drive unit 200.

[0170] Therefore, unlike the prior art, in the seat position adjustment device 100 with improved assemblability, since the connection between the gear part 400 and the placement part 600 is a slot-type connection, there is no need to use brackets and rivets for the connection between the gear part 400 and the placement part 600, which has the advantage of reducing the overall weight.

[0171] Furthermore, unlike in the past, in the seat position adjustment device 100 with improved assemblability, the placement part 600 is formed in a shape that surrounds and closely adheres to the outer part of the gear part 400, thereby having the advantages of reducing the weight of materials used in manufacturing and facilitating the assembly between the gear part 400 and the placement part 600.

[0172] Furthermore, unlike in the past, in the improved seat position adjustment device 100, the outer part of the gear part 400 is engaged with the placement part 600 in a way that allows it to rotate while closely adhering to the inner side of the placement part 600. Therefore, it has the advantage of not requiring additional brackets and rivets to rotate the placement part 600 and the gear part 400 together.

[0173] In addition, the guide 620 is bent into a large arc shape around the curved surface 410 and fits tightly against the curved surface 410. Therefore, the guide 620 prevents the second housing 422b from detaching from the outside through the opening 605. Thus, it has the advantage that no additional brackets and rivets are needed for a stable rotational engagement between the gear part 400 and the placement part 600.

[0174] In addition, the placement part 600 is made of a bent plate-shaped material to form a bearing support with an opening at the top. Therefore, the volume of the material is minimized, the material is easy to process, and the cross-sectional thickness of the placement part 600 surrounding the gear part 400 is uniform, thereby improving the weight reduction effect.

[0175] Furthermore, in the seat position adjustment device 100 with improved assembly, when the placement part 600 is attached to the seat or seat frame 60, the rod part 800 can be rotatably connected to the connecting rod attached to the track 50. In this case, the seat frame 60 can be raised or lowered depending on the direction of movement of the rod part 800.

[0176] On the other hand, refer to Figure 9 In the placement section 600, the inner edge of one side of the guide 620, which is separated from the slot 623 to the rear and front respectively, is processed into a tapered shape, thereby forming a first inclined surface 670 and a second inclined surface 680.

[0177] The first inclined surface 670 and the second inclined surface 680 have the advantage of guiding the gear part 400 to be quickly and accurately inserted into the first rotation space 20 during the process of inserting the gear part 400 from one side of the placement part 600 into the first rotation space 20.

[0178] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described in this specification and the structures illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, it should be understood that at the time of this application, there may be various equivalent technical solutions and modifications that can replace these. Therefore, the embodiments described above should be understood in all respects as exemplary rather than limiting. The scope of the present invention is embodied by the claims described below rather than the detailed description. All changes or modifications derived from the meaning, scope, and equivalent concepts of the claims should be interpreted as being included within the scope of the present invention.

Claims

1. A seat position adjustment device with improved assembly characteristics, comprising: The drive unit includes a motor having a drive shaft formed thereon; The gear portion has a curved surface formed on its outer side and is connected to the drive shaft in a gear-like manner. The curved surface extends along a direction of rotation based on a first axis extending to both sides. A lever portion that passes through the gear portion and engages with the gear portion in such a way that it receives power from the drive shaft and moves forward or backward; as well as The placement portion, wherein a portion of the upper end of the curved plate structure surrounding the curved surface portion respectively surrounds the rod portion at the front and rear of the gear portion, and respectively forms through holes, wherein the upper and lower lengths of the through holes are longer than the upper and lower thicknesses of the rod portion. With the placement part fixed, the seat connected to the rod moves as the rod moves.

2. The improved seat position adjustment device according to claim 1, characterized in that, The placement part is formed in the shape of a large bow and fits tightly against the curved surface so as to engage with the gear part in a manner that allows it to slide along a direction of rotation based on the first axis.

3. The improved seat position adjustment device according to claim 2, characterized in that, The gear section includes: The outer casing has multiple ribs forming the curved surface on its outer side, and hollow portions forming open interior spaces at the front and rear of the outer casing to allow the rod to pass through; and A protrusion is formed on the lower part of the outer shell.

4. The improved seat position adjustment device according to claim 3, characterized in that, In the placement portion, a portion of the placement portion is recessed to form a groove for the protrusion to be inserted, corresponding to the path along which the protrusion rotates about the first axis during the movement of the seat.

5. The improved seat position adjustment device according to claim 4, characterized in that, In the placement part, a portion of one side of the placement part is recessed toward the slide groove to form a slot that connects with the slide groove.

6. The improved seat position adjustment device according to claim 5, characterized in that, The inner edge of one side of the placement part is machined into a cone shape to form an inclined surface.

7. The improved seat position adjustment device according to claim 4, wherein, The gear unit also includes: A worm gear, which engages with the drive shaft in the space; and A gear nut is provided in the space, wherein the inner side of the gear nut is threaded into the rod, and the outer side of the gear nut is geared into the worm.

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