Search

EP-3974248-B1 - PUMPING DEVICE FOR VEHICLE SEAT

EP3974248B1EP 3974248 B1EP3974248 B1EP 3974248B1EP-3974248-B1

Inventors

  • KIM, WON

Dates

Publication Date
20260506
Application Date
20210915

Claims (8)

  1. A pumping device for a vehicle seat, the pumping device comprising: a housing (100) made of a plastic material, the housing (100) comprising a bottom surface having a through hole, a side wall arranged along an outer circumferential surface of the bottom surface, and an open upper surface; a clutch device (110, 120) and a brake device (130) seated on the clutch device (110, 120), both of the clutch device (110, 120) and brake device (130) being disposed in the housing (100); a lever connected to the housing (100) at an outside of the bottom surface through the through hole so that the housing (100) is configured to transmit drive force from the lever to the clutch device (110, 120); and a housing cover (200) made of a metal material, the housing cover (200) comprising a first side surface covering the open upper surface of the housing (100), a plurality of bending parts (210, 220, 230) at an edge thereof such that the bending parts (210, 220, 230) are bent toward the housing to achieve coupling between the housing cover (200) and the housing (100), and a second side surface coupled to a seat frame, wherein the clutch device (110, 120) comprises a clutch cam (110) and a clutch drum (120) disposed inside the housing (100), the clutch drum (120) is configured to be compressed, and the brake device (130) is seated on an upper end of the clutch drum (120).
  2. The pumping device of claim 1, wherein the housing (100) includes a plurality of coupling parts spaced apart from each other at an upper portion of the side wall of the housing (100), and the housing cover (200) is seated on the housing (100) and the bending parts (210, 220, 230) of the housing cover (200) are bent and inserted into the coupling parts of the housing (100).
  3. The pumping device of claim 2, wherein each of the coupling parts comprises coupling protrusions spaced apart from each other in a lateral direction, and each of the bending parts (210, 220, 230) is inserted into a portion between the coupling protrusions spaced apart from each other while being bent and is fitted into and overlaps with the side wall of the housing (100).
  4. The pumping device of claim 1, wherein a plurality of assembly protrusions are disposed upward on an upper end of the side wall of the housing (100) and are spaced apart from each other and assembly grooves (250) are disposed at the housing cover (200), and wherein the housing cover (200) is seated on an upper end of the housing (100) and the assembly protrusions of the housing (100) are inserted into the assembly grooves (250) of the housing cover (200).
  5. The pumping device of claim 1, wherein a plurality of downward protruding hooks are disposed at an edge of the bottom surface of the housing (100) and are spaced apart from each other, and a lever bracket to which the lever is mounted is assembled to the bottom surface of the housing (100) in such a manner that separation of the lever bracket is prevented as an edge of the lever bracket is blocked at the hooks.
  6. The pumping device of claim 1, wherein the brake device (130) comprises a brake ring (135) having a plurality of braking protrusions protruding outward, and an upper portion of the side wall of the housing (100) has a plurality of insertion grooves into which the braking protrusions of the brake ring (135) are inserted, such that the braking protrusions of the brake ring (135) are inserted into the insertion grooves of the housing (100), thereby preventing rotation of the brake ring (135).
  7. The pumping device of claim 1, wherein the housing cover (200) has a plurality of holes, and the housing cover (200) is coupled to the seat frame by using the plurality of holes through a manner including bolting or riveting when being coupled to the seat frame.
  8. The pumping device of claim 1, wherein the bottom surface of the housing (100) comprises a first surface (102) surrounding the through hole and a second surface (104) protruding from the first surface (102) toward the clutch device (110, 120) and surrounding the first surface (102), and the clutch device (110, 120) comprises a clutch cam (110) and a clutch drum (120), wherein the clutch cam (110) is supported by the first surface (102) and the clutch drum (120) is supported by the second surface (104).

Description

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates generally to a pumping device for a vehicle seat, wherein a housing is formed of a plastic material, a housing cover is formed of a metal material, and the housing and the housing cover are coupled to each other by bending and fitting methods. Description of the Related Art A conventional pumping device is a device mounted to a vehicle seat so that a seat occupant adjusts the height of a seat cushion to suit his/her body. When the seat occupant controls a lever provided at a side surface of the seat cushion clockwise or counterclockwise, operation force of the lever is transmitted to a link device through the pumping device to raise or lower the seat cushion corresponding to an operated direction of the lever, so that the height of the seat cushion may be adjusted. However, the conventional pumping device has many restrictions of shape, thereby affecting a method, mass production, etc. because almost all elements thereof are designed based on metal. In order to compensate the restrictions of shape, addition of elements or additional post-processing is required, which causes an increase in product cost. Therefore, in the current situation, popular design has been oriented to achieve cost competitiveness, and an environment in which it is difficult to adopt new ideas has been created, so development of a new pumping device compensating the problems has been required. The foregoing is intended merely to aid in the understanding of the background of the present invention, and is not intended to mean that the present invention falls within the purview of the related art that is already known to those skilled in the art. Document KR 10-0784620 B1 discloses an example for a pumping apparatus for a vehicle seat cushion. DE 10 2017 206 231 A1 discloses another pumping device for a vehicle seat comprising a housing, a clutch unit and a braking unit. SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the related art, and the present invention is intended to propose a pumping device for a vehicle seat, wherein a housing is made of a plastic material so as to increase a degree of freedom of shape in manufacturing the housing, a housing cover is made of a metal material, and the housing and the housing cover are coupled to each other by bending and fitting methods. In order to achieve the above objective, the invention provides pumping device for a vehicle seat in accordance with claim 1. According to one aspect of the present invention, there is provided a pumping device for a vehicle seat. The pumping device for a vehicle seat includes: a housing made of a plastic material, the housing including a bottom surface having a through hole, a side wall arranged along an outer circumferential surface of the bottom surface, and an open upper surface; a clutch device and a brake device seated on the clutch device, both of the clutch device and brake device disposed in the housing; a lever connected to the housing at an outside of the bottom surface through the through hole so that the housing may be configured to transmit drive force from the lever to the clutch device; and a housing cover made of a metal material, the housing cover including a first side surface covering the open upper surface of the housing, a plurality of bending parts at an edge thereof such that the bending parts may be bent toward the housing to achieve coupling between the housing cover and the housing, and a second side surface coupled to a seat frame. The clutch device includes a clutch cam and a clutch drum, and in the inside of the housing, while the clutch drum is compressed, the brake device is seated on an upper end of the clutch drum. A plurality of coupling parts may be provided to be spaced apart from each other at an upper portion of the side wall of the housing, and the housing cover may be seated on the housing and the bending parts of the housing cover may be bent and inserted into the coupling parts of the housing. Each of the coupling parts may include coupling protrusions spaced apart from each other in a lateral direction, and each of the bending parts may be inserted into a portion between the coupling protrusions spaced apart from each other while being bent and be fitted into and overlaps with the side wall of the housing. A plurality of assembly protrusions may be provided upward on an upper end of the side wall of the housing and be spaced apart from each other and assembly grooves may be provided at the housing cover, so the housing cover may be seated on an upper end of the housing and the assembly protrusions of the housing may be inserted into the assembly grooves of the housing cover. A plurality of downward protruding hooks may be provided at an edge of the bottom surface of the housing and be spaced apart from each other, and a lever bracket to which the lever may be mounted