Ergonomic motion seat air pump using rotary motor

Abstract

The present invention relates to an ergonomic motion seat air pump wherein a pumping piston is driven by a pumping piston driving device which converts the torque of a rotary motor into linear reciprocating movements by using a cam that linearly moves upward / downward, thereby ensuring an excellent amount of air pumping per minute. According to the present invention, the air pump comprises: a housing having a driving device accommodation space inside the rear end of a rectangular container and having a pumping piston accommodation space inside the front end thereof, thereby discharging compressed air from the front end through an air discharge port; a driving motor accommodated in the driving device accommodation space inside the housing so as to generate rotational power from a rotor; a pump shaft supported in the driving device accommodation space inside the housing to be able to linearly reciprocate; a power conversion unit accommodated in the driving device accommodation space of the housing so as to receive rotational power from the driving motor and convert same such that the pump shaft linearly reciprocates; a pumping piston accommodated in the pumping piston accommodation space of the housing so as to suction external air according to reciprocating movements of the pump shaft and to supply compressed air to the front end; a first check valve installed in the main body of the pumping piston to be closed when the pumping piston ascends and to be opened when the pumping piston descends; and a second check valve accommodated in the valve accommodation space of the housing to be opened when the pumping piston ascends, thereby discharging compressed air to the outside, and to be closed when the pumping piston descends.

Description

Air pump for ergonomic seats using a rotary motor

[0001] The present invention relates to an air pump for an ergo-motion seat, and more specifically, to an air pump for an ergo-motion seat using a rotary motor that drives a pumping piston by means of a pumping piston driving unit that converts the rotational force of the rotary motor into linear reciprocating motion using a cam that moves up and down in a linear motion, thereby having a small number of parts and a simple flow path structure, resulting in high assembly productivity and high driving efficiency, and excellent air pumping volume per minute (LPM) (L / min).

[0002] The Ergo Motion Seat comfortably supports the occupant by adding internal air cushions. In addition, the Ergo Motion Seat adjusts the air pressure to provide an optimal seating experience tailored to the body type and driving posture of both the passenger and the driver.

[0003] The above-mentioned Ergo Motion Seat is equipped with a total of seven air bladders, two in the bottom cushion, three in the backrest, and one each in the side bolsters on both sides, and controls the air volume of the bladders as needed to adjust the occupant's posture.

[0004] The Ergo Motion Seat is equipped with a feature that allows the occupant to directly set the desired cushioning level, enabling the occupant to control the air cushions in the seat cushion and the backrest to the desired degree.

[0005] In addition, it is equipped with drive mode linkage technology that adjusts the size of the air cushions to change the seating position when the drive mode is set, helping the driver to immerse themselves in driving in a lower posture in sports driving mode.

[0006] The Ergo Motion Seat features a function that allows the occupant to directly adjust the desired cushioning level. The air cushion in the seat cushion inflates by approximately 10mm, while the air cushion in the backrest inflates by up to 30mm, allowing the occupant to control the level of each section as desired. This function can be controlled via a switch on the side of the seat and is integrated with the AVN monitor; as the operating parts can be directly viewed, it offers intuitive usability.

[0007] Air cells capable of being inflated are each installed in the lumbar support, bolster device, multi-contour, etc. installed on the seat of the above-mentioned ergo-motion seat, thereby enabling a stable riding posture and convenience of sitting in the seat.

[0008] For example, air cells expand or contract to adjust the passenger's posture and can be installed on the left and right sides of the seat back and seat cushion, respectively.

[0009] The pneumatic control system of the above-described ergo-motion seat can control the pressure of the air cells by driving an air pump to inject air into each air cell or to discharge the air filled in the air cells.

[0010] Korean Published Patent Application No. 10-2020-0051936 (Patent Document 1) proposes a pneumatic pump structure in which an inlet check valve and an outlet check valve are integrated, as a check valve structure for intake and exhaust into a pumping piston in a pneumatic pump applied to a pneumatic control system of a seat.

[0011] A pneumatic pump including the integrated check valve structure of Patent Document 1 minimizes the operating error of the integrated valve and minimizes vibration and noise generation during the air intake and exhaust process between the pneumatic pump and the air bladder.

[0012] In the pneumatic pump of Patent Document 1, when the cam and camshaft are rotated by a drive motor, the rotating plate connected to the tip of the camshaft also rotates, and at the same time, the four corners of the rotating plate move up and down alternately. As a result, when the rotating plate moves up and down, the four pumping pistons, each having a lower end connected to the four corners of the rotating plate, also move up and down alternately, pushing air through the valve plate toward the integrated check valve, and the air is discharged through the integrated check valve to the discharge port of the cover.

[0013] The pneumatic pump of the above-mentioned patent document 1 consists of many components in the air pumping section, making production and assembly difficult and very complex, and the structure of the suction and discharge paths is also complex, resulting in reduced productivity and increased process costs.

[0014] In addition, the above pneumatic pump implements air pumping by unbalancing the rotation plate with the cam and camshaft, which are unbalanced shafts, so it has a structure that is structurally very prone to vibration and noise.

[0015] The above pneumatic pump has a structure in which four pumping pistons sequentially handle air intake and exhaust according to the rotation of an unbalanced rotating plate, so it has a problem of insufficient air pumping volume per minute (LPM) (L / min) due to low efficiency.

[0016] Furthermore, since the air pumping unit and the DC drive motor that provides rotational force to it are manufactured separately and then assembled, the overall size of the pneumatic pump becomes large.

[0017] In addition, the above pneumatic pump fundamentally uses a DC drive motor to provide rotational force to the air pumping section, which results in reduced durability against noise and vibration.

[0018] Since the above pneumatic pumps are manufactured separately and then assembled, it is difficult to minimize the length of the rotation shaft of the drive motor for rotating the cam of the air pumping part, and consequently, there is a problem in that it is difficult to minimize vibration.

[0019] Accordingly, the present invention is proposed to solve the problems of the aforementioned prior art, and its purpose is to provide an air pump for an ergo-motion seat using a rotary motor that has excellent air pumping volume per minute (LPM) (L / min) by driving a pumping piston by means of a pumping piston driving device that converts the rotational force of the rotary motor into linear reciprocating motion using a cam that moves up and down linearly, thereby having a small number of parts and a simple flow path structure, resulting in high assembly productivity and high driving efficiency.

[0020] Another objective of the present invention is to provide an air pump for an ergonomic seat that can minimize vibration and noise by driving a single large pumping piston by means of a pump shaft that reciprocates linearly between top dead center and bottom dead center.

[0021] Another objective of the present invention is to provide an air pump for an ergonomic motion seat that is compact in overall size and highly durable, which drives a large pumping piston by means of a pump shaft that reciprocates linearly and is housed inside an integrated housing, and discharges air into an air cell through first and second check valves.

[0022] To achieve the above-mentioned objective, an air pump for an ergo-motion seat according to one feature of the present invention comprises: a housing having an overall rectangular shape, having a drive unit receiving space inside the rear end and first and second pumping piston receiving spaces inside the front end, and discharging compressed air from the front end to the air cell of the ergo-motion seat through an air discharge port; a drive motor received in the drive unit receiving space inside the housing and generating rotational power from a rotor; a pump shaft supported to enable linear reciprocating motion in the drive unit receiving space inside the housing; a power conversion unit received in the drive unit receiving space of the housing and receiving rotational power from the drive motor to convert the pump shaft into linear reciprocating motion; and a pumping piston received in the first and second pumping piston receiving spaces of the housing, with a central part connected to the front end of the pump shaft to reciprocate, sucking air from the outside of the housing and supplying compressed air to the front end. It is characterized by including: at least one first backflow prevention valve installed in the body of the pumping piston, which closes when the pumping piston rises and opens when the pumping piston descends; and a second backflow prevention valve received inside the valve receiving space of a valve receiving projection provided at the front end of the housing, which opens when the pumping piston rises to discharge compressed air to the outside through an air discharge port and closes when the pumping piston descends.

[0023] The above-mentioned drive motor and power conversion unit can form a pumping piston drive device that reciprocates the pump shaft using the rotational power of the drive motor.

[0024] Additionally, the pumping piston drive unit may include: a drive motor that generates rotational power from a rotor and is housed in a drive unit housing space inside the housing; a pump shaft that is supported to enable linear reciprocating motion in a drive unit housing space inside the housing; and a power conversion unit that is housed in a drive unit housing space of the housing and receives rotational power from the drive motor to convert the pump shaft into linear reciprocating motion.

[0025] Furthermore, the power conversion unit may include a cam arm having through holes formed on one side and the other side; first and second bearings inserted into and supported by the through holes on the one side and the other side; a first hinge shaft, the front end of which passes through the first bearing and is fixedly coupled to a hinge shaft coupling hole formed in the back yoke of the drive motor, and the rear end of which is rotatably supported by the first bearing; and a second hinge shaft, the front end of which passes through the second bearing and is fixedly coupled to a coupling hole of the pump shaft, and the rear end of which is rotatably supported by the second bearing.

[0026] As described above, in the present invention, the pumping piston is driven by a pumping piston driving device that converts the rotational force of a rotary motor into linear reciprocating motion using a cam that moves up and down linearly, so the number of parts is small and the flow path structure is simple, so assembly productivity is high and driving efficiency is high, resulting in an excellent air pumping volume per minute (LPM) (L / min).

[0027] In addition, the conventional air pumping method, which sequentially drives four pumping pistons by unbalancedly rotating a rotating plate using an unbalanced shaft such as a cam and a camshaft, has a structure that is structurally very prone to vibration and noise. However, in the present invention, by driving a single large pumping piston using a pumping piston drive device that converts the rotational power of a drive motor into linear reciprocating motion using a cam, the factors causing vibration and noise can be structurally eliminated.

[0028] Furthermore, in the present invention, a single large pumping piston is driven by a pump shaft that reciprocates linearly and is housed inside an integrated housing, and air is discharged into an air cell through first and second backflow prevention valves, so the overall size is compact and the durability is excellent.

[0029] FIGS. 1 and FIGS. 2 are a perspective view and a plan view, respectively, of an air pump for an ergo-motion seat according to a preferred embodiment of the present invention.

[0030] FIG. 3a is a longitudinal cross-sectional view of an air pump for an ergo-motion seat according to a preferred embodiment of the present invention, showing a cam connection structure between a drive motor and a pump shaft.

[0031] FIGS. 3b and FIGS. 3c are cross-sectional views along line AA of FIG. 2, respectively, showing the case where the pumping piston is located at the top dead center of the air discharge mode and the bottom dead center of the air intake mode in an air pump for an ergo-motion seat according to a preferred embodiment of the present invention.

[0032] Figure 4 is a cross-sectional view of line BB of Figure 2.

[0033] FIG. 5 is an exploded perspective view of the module by module of an air pump for an ergo-motion seat according to the present invention.

[0034] FIG. 6 is an exploded view of the pumping piston drive unit in FIG. 5.

[0035] FIGS. 7a and FIGS. 7b are a perspective view and a cross-sectional view, respectively, of the first backflow prevention valve.

[0036] FIGS. 8a to 8c are an exploded perspective view, an axial cross-sectional view, and an exploded cross-sectional view, respectively, of the second backflow prevention valve.

[0037] FIGS. 9a to 9c are a perspective view, a plan view, and a cross-sectional view along the CC line of FIG. 9b, respectively, showing a drive motor for an air pump for an ergo-motion seat according to the present invention.

[0038] Hereinafter, a preferred embodiment according to the present invention will be described with reference to the attached drawings.

[0039] In this process, the size or shape of components depicted in the drawings may be exaggerated for clarity and convenience of explanation. Additionally, terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intent or convention of the user or operator. Definitions of such terms should be based on the content throughout this specification.

[0040] The Ergo Motion Seat comfortably supports the occupant by adding internal air cells. In addition, the Ergo Motion Seat adjusts the seat's air pressure to provide an optimal seating experience tailored to the body type and driving posture of both the passenger and the driver.

[0041] The above-described ergo-motion seat is equipped with a total of seven air bladders (air cells), for example, two in the bottom cushion, three in the backrest, and one each in the side bolsters on both sides, and the occupant's posture can be adjusted by controlling the amount of air in the air bladders (air cells) as needed.

[0042] The pneumatic control system of the ergo motion seat can regulate the pressure of the air cells by driving an air pump to inject air into each air cell or to discharge the air filled in the air cells.

[0043] The air pump of the present invention can supply air to an air cell for an ergo-motion seat through a first and second backflow prevention valve by driving a pumping piston by means of a pump shaft that reciprocates linearly by a pumping piston driving device.

[0044] Referring to FIGS. 1 to 6, an air pump (1000) for an ergo motion seat according to a preferred embodiment of the present invention is formed in the shape of a rectangular container overall, has a driving device receiving space (117) inside the rear end and first and second pumping piston receiving spaces (118, 119) inside the front end, and has a housing (100) that discharges compressed air from the front end to the air cell of the ergo motion seat through an air discharge port (136); a driving motor (10) that is received in the driving device receiving space (117) inside the housing (100) and generates rotational power from a rotor (30); a pump shaft (251) that is supported to enable linear reciprocating motion in the driving device receiving space (117) inside the housing (100); and a pump shaft (251) that is received in the driving device receiving space (117) of the housing (100) and converts the rotational power of the driving motor (10) into linear reciprocating motion. A power conversion unit (500); a pumping piston (300) that is received in the first and second pumping piston receiving spaces (118, 119) of the housing (100) and has a central part connected to the tip of the pump shaft (251) to reciprocate, sucking air from the outside of the housing (100) and supplying compressed air to the tip; at least one first backflow prevention valve (310) installed in the body (301) of the pumping piston (300) that closes when the pumping piston (300) rises and opens when the pumping piston (300) descends; and a valve receiving space (134) of the valve receiving projection (135) that opens when the pumping piston (300) rises to discharge compressed air to the outside through an air discharge port (136) and closes when the pumping piston (300) descends. It includes a second backflow prevention valve (400).

[0045] The above housing (100) is formed in the shape of a rectangular box overall and includes a body (110) having a drive device receiving space (117) inside the rear end and a first and second pumping piston receiving space (118, 119) inside the front end, a drive device cover (120) fixed to the rear end of the body (110) to seal the drive device receiving space (117) of the body (110), a pump cover (130) fixed to the front end of the body (110) to seal the first and second pumping piston receiving space (118, 119) formed inside the front end of the body (110), and a valve receiving part (140) coupled to the front end of the pump cover (130) and receiving and supporting the second backflow prevention valve (400) inside.

[0046] Through holes (149, 139, 119, 129) are formed at each of the four corners of the valve receiving portion (140), pump cover (130), body (110), and driving device cover (120), and the housing (100) is integrated by fastening fixing bolts to the through holes (149, 139, 119, 129).

[0047]

[0048] In addition, a sealing joint (141) is formed between the valve receiving portion (140) and the pump cover (130) in a structure in which a plurality of grooves and protrusions are combined, and the sealing joint (141) also serves to fix the second backflow prevention valve (400) by compressing and supporting the flange (411a) of the second backflow prevention valve (400) inserted into the inner groove.

[0049] Furthermore, a circular fixing groove (116) is formed in the body (110) to insert and fix the outer fixing part (302) of the pumping piston (300) in a manner similar to the sealing joint (141) between the pump cover (130) and the body (110), and a protrusion is formed on the outer periphery of the rear end of the pump cover (130) to serve to fix the outer fixing part (303) of the pumping piston (300) when joined together.

[0050] In this case, the body (110) is connected through a central through hole (115) between a driving device receiving space (117) formed inside the rear end and a first and second pumping piston receiving space (118, 119) formed inside the front end, and a sleeve bearing (370) that supports the pump shaft (251) to move in a linear reciprocating motion is received in the rear end of the central through hole (115).

[0051]

[0052] The above drive device receiving space (117) is composed of a space that accommodates the pumping piston drive device (250), and the first and second pumping piston receiving spaces (118, 119) form a space with a cross-section approximately rhomboidal in shape inside by the combination of the front end of the body (110) and the rear end of the pump cover (130). To this end, an inclined surface (113) with a decreasing diameter toward the central through hole (115) is formed at the front end of the body (110), and an inclined surface (131) with a decreasing diameter toward the through hole formed at the rear end or center of the pump cover (130) is formed.

[0053] In the body (110), a plurality of longitudinal passages (330) penetrating from the first and second pumping piston receiving spaces (118, 119) to the driving device receiving space (117) are formed along the circumference of the inclined surface (113), and some of the plurality of longitudinal passages (330) are formed in the longitudinal direction of the body (110) and are connected to a plurality of longitudinal passages (340) that are connected to the outside.

[0054] The size and number of a plurality of longitudinal channels (330) and a plurality of longitudinal channels (340) formed in the body (110) can be appropriately set considering the air pumping rate (LPM) (L / min) of the air pump (1000) per minute and the heat dissipation passages for circulating and cooling the heat generated from the coil (44) of the drive motor (10) provided in the pumping piston drive device (250).

[0055] The pumping piston (300) is made of rubber material, and when the pump shaft (251) moves up and down between the top dead center of the air discharge mode and air intake mode shown in FIG. 3a and the bottom dead center of the air exhaust mode shown in FIG. 3b, it performs an air pumping operation while repeatedly rising and falling.

[0056] The pumping piston (300) comprises a main body (301) made of a roughly circular plate, an inner fixing part (303) formed in the inner circumference of the main body (301) and coupled to an annular groove (251c) formed at the tip of the pump shaft (251), and an outer fixing part (302) formed in the outer circumference of the main body (301), inserted into a fixing groove (116) formed at the tip of the body (110) and fixed by the rear end of the pump cover (130).

[0057] In the first and second pumping piston receiving spaces (118, 119), the space formed at the rear end of the pumping piston (300) is defined as the first pumping piston receiving space (118), and the space formed at the front end of the pumping piston (300) is defined as the second pumping piston receiving space (119). In this case, the receiving spaces of the first and second pumping piston receiving spaces (118, 119) can be varied according to the rising and falling of the pumping piston (300).

[0058] In the first and second pumping piston receiving spaces (118, 119), as shown in FIG. 3a, the pumping piston (300) rises according to the reciprocating motion of the pump shaft (251) to set the valve of the first backflow prevention valve (310) to a closed state and compress the air located in the second pumping piston receiving space (119), or as shown in FIG. 3b, the pumping piston (300) descends to introduce the air of the first pumping piston receiving space (118) into the second pumping piston receiving space (119) through the first backflow prevention valve (310) with the valve in an open state.

[0059] As shown in FIG. 7a and FIG. 7b, the first backflow prevention valve (310) has a neck portion (312) inserted into a through hole formed in the body (301) of the pumping piston (300), a hemispherical valve top (313) having an outer diameter larger than the outer diameter of the neck portion (312) is connected to the rear end of the neck portion (312), and a disc-shaped support (314) is connected to the front end of the neck portion (312).

[0060] The outer diameter of the neck portion (312) is formed to be smaller than the diameter of the through hole formed in the main body (301) of the pumping piston (300), so that when the pumping piston (300) rises, the air in the second pumping piston receiving space (119) is compressed, thereby setting the valve to a closed state, and when the pumping piston (300) descends, the air in the first pumping piston receiving space (118) is compressed, thereby setting the valve to an open state.

[0061] As a result, the first backflow prevention valve (310) compresses the air located in the second pumping piston receiving space (119) when the pumping piston (300) rises, and discharges the compressed air to the outside through the second backflow prevention valve (400), and when the pumping piston (300) descends, it introduces the air from the first pumping piston receiving space (118) into the second pumping piston receiving space (119) through the first backflow prevention valve (310) which is in an open state.

[0062] Additionally, the first backflow prevention valve (310) generates a suction force in the first pumping piston receiving space (118) when the pumping piston (300) rises, thereby introducing air from the outside into the first pumping piston receiving space (118) inside the housing (100) through a plurality of grooves (111), a driving device receiving space (117), and a plurality of longitudinal passages (330) sequentially, or through a plurality of longitudinal passages (340) and a plurality of longitudinal passages (330).

[0063] The above valve receiving portion (140) includes a main body (142) in the shape of a square plate, a valve receiving projection (135) protruding from the central part of the main body (142) to form a valve receiving space (134) inside, and an air discharge port (136) having a tip portion extended from the valve receiving projection (135) and an internal through hole (136a) communicating with the valve receiving space (134) to discharge discharge air.

[0064] As shown in FIGS. 3A and 3B and FIGS. 8A to 8C, the second backflow prevention valve (400) is placed in the valve receiving space (134) formed inside the valve receiving projection (135) of the valve receiving portion (140), and serves to discharge compressed air supplied by the pumping piston (300) to the outside through the air discharge port (136).

[0065] To this end, the second backflow prevention valve (400) includes a valve top (420) having a hemispherical ball (422) protruding from the tip of a neck portion (423) protruding from the center of the lower surface of a disc (421), and a support body (410) that supports the valve top (420).

[0066] The above support (410) includes an inner ring (412) into which a hemispherical ball (422) of the valve top (420) is coupled to a through hole, and an outer ring (411) that supports the inner ring (412) through a pair of bridges (413), and the outer ring (411) has a flange (411a) extending outwardly at the lower end that is received in a groove of the sealing joint (141).

[0067] The second backflow prevention valve (400) is received in the valve receiving space (134), and the flange (411a) is received in the groove of the sealing joint (141) to be fixed.

[0068] The valve top (420) and the support body (410) are both made of rubber, and in particular, a pair of bridges (413) supporting the inner ring (412) of the support body (410) are designed to be relatively flexible. Additionally, an arc-shaped through hole is formed between the pair of bridges (413) supporting the inner ring (412).

[0069] As a result, when the pump shaft (251) and the pumping piston (300) descend to the bottom dead center shown in FIG. 3b and suction force is applied or there is no pressure of discharged air from below, the ball (422) of the valve top (420) is coupled to the through hole of the inner ring (412), and the disc (421) of the valve top (420) closes the arc-shaped through hole between the pair of bridges (413).

[0070] However, when the pump shaft (251) and the pumping piston (300) rise to the top dead center shown in FIG. 3a and are pressurized by the compressed discharge air in the second pumping piston receiving space (119), the inner ring (412) to which the ball (422) of the valve top (420) is coupled is lifted due to the flexibility of a pair of bridges (413).

[0071] As a result, the disc (421) of the valve top (420) opens the arc-shaped through hole between the pair of bridges (413), and the compressed discharge air of the second pumping piston receiving space (119) is discharged through the arc-shaped through hole, through the valve receiving space (134), and from the air discharge port (136) to the air cell of the ergo motion seat.

[0072] After that, when the compressed discharge air is discharged from the air discharge port (136) and the pump shaft (251) and pumping piston (300) descend to the bottom dead center shown in FIG. 3b, the inner ring (412) coupled with the ball (422) of the valve top (420) and the disc (421) of the valve top (420) descend to close the arc-shaped through hole.

[0073] In addition, the drive motor (10) and the power conversion unit (500) form a pumping piston drive device (250) that reciprocates the pump shaft (251) using the rotational power of the drive motor (10).

[0074] A pumping piston driving device (250) according to the present invention will be described below with reference to FIGS. 6 and FIGS. 9a to 9c.

[0075] The pumping piston drive device (250) according to the present invention includes a drive motor (10) that generates rotational power from a rotor (30) and is housed in a drive device receiving space (117) inside the housing (100), a pump shaft (251) that is supported to enable linear reciprocating motion in the drive device receiving space (117) inside the housing (100), and a power conversion unit (500) that is housed in the drive device receiving space (117) of the housing (100) and receives rotational power from the drive motor (10) to convert the pump shaft (251) into linear reciprocating motion.

[0076] First, as shown in FIGS. 9a to 9c, the drive motor (10) comprises a rectangular housing (11) having a shaft-supporting bearing housing (11c) protruding therefrom, in which a circular receiving groove (11b) is formed inside and a through hole (11d) is formed in the center; a rotor (30) in which a shaft (32b) is rotatably supported in the through hole (11d) of the bearing housing (11c); a bearing seated in the through hole (11d) of the bearing housing (11c) to rotatably support the shaft (32b); and a stator (40) seated in the circular receiving groove (11b) of the housing (11) to generate a rotating magnetic field and drive the rotor (30) to rotate.

[0077] The above housing (11) has through holes (11a) formed at each of its four corners so that it can be fixed to the body (110), and is fixed to the body (110) by fastening a fixing screw (12).

[0078] A stepped portion (11e) for setting the position of the bearing is protruded from the through hole (11d) of the bearing housing (11c).

[0079] The rotor (30) comprises a magnet (31) that is positioned at a certain gap on the inner circumference of the stator (40), is formed in a cylindrical shape, and has a structure in which N and S poles are alternately divided and magnetized, and a back yoke (32) that forms a magnetic circuit on the inside of the magnet (31).

[0080] The back yoke (32) has a flange portion (32a) formed by bending at the bottom end to support the bottom end of the magnet (31), a circular groove (32c) formed at the bottom to accommodate the bearing housing (11c), and a shaft (32b) protruding from the center of the bottom surface to be rotatably supported by the bearing.

[0081] The back yoke (32) has a hinge shaft coupling hole (33d) formed through it, into which a first hinge shaft (520) coupled to the lower end of the power conversion unit (500) is screw-coupled. In this case, the position where the hinge shaft coupling hole (33d) is formed is set at a position offset from the center.

[0082] In addition, the method of connecting the first hinge shaft (520) to the hinge shaft coupling hole (33d) can also be carried out by a welding method in addition to a screw connection.

[0083] As shown in FIG. 9b, the stator (40) comprises a stator core (45) whose outer circumference is fixed to the inner circumference of the receiving groove (11b) of the housing (11), a bobbin (43) surrounding the coil winding area of ​​the stator core (45) and the back yoke (42), and a coil (44) wound in the coil winding area of ​​the bobbin (43) to which a motor driving signal is applied.

[0084] In this case, the method of fixing the stator (40) to the receiving groove (11b) of the housing (11) can be done by bolt fastening or fusion.

[0085] The above bobbin (43) is made of an insulating material and has an outer guide and an inner guide extended to define a plurality of coil winding regions corresponding to a plurality of teeth (41).

[0086] The above stator core (45) has a plurality of teeth (41) formed in a 'T' shape, each extending toward the center, formed on the inner side of the annular yoke (42).

[0087] The above drive motor (10) generates a rotating magnetic field as a motor drive signal is applied to the coil (44) of the stator (40) to drive the rotor (30) to rotate.

[0088] The above power conversion unit (500) includes a cam arm (510) having through holes (510, 511) formed on one side and the other side, first and second bearings (530, 531) inserted into and supported by the through holes (510, 511) on the one side and the other side, a first hinge shaft (520) whose front end passes through the first bearing (530) and is fixedly coupled to a hinge shaft coupling hole (33d) formed in the back yoke (32) of the drive motor (10), and whose rear end is rotatably supported by the first bearing (530), and a second hinge shaft (521) whose front end passes through the second bearing (531) and is fixedly coupled to a coupling hole of the pump shaft (251), and whose rear end is rotatably supported by the second bearing (531).

[0089] In the through holes (510, 511) on one side and the other side where the first hinge shaft (520) and the second hinge shaft (521) are joined, the first and second bearings (530, 531) and the washer (540) are respectively inserted, and at the end of the through holes (510, 511), a stepped portion (550) is protruded to prevent the first and second bearings (530, 531) and the washer (540) from coming loose.

[0090] In the above power conversion unit (500), when the back yoke (32) of the rotor (30) rotates according to the operation of the drive motor (10), the first hinge shaft (520) which is coupled and fixed to the hinge shaft coupling hole (33d) of the back yoke (32) also rotates together with the back yoke (32).

[0091] Accordingly, the lower part of the cam arm (510) to which the first hinge shaft (520) is rotatably coupled also rotates along a radius of rotation corresponding to the distance between the center of the back yoke (32) and the hinge shaft coupling hole (33d) located at a predetermined distance from the center.

[0092] Since the above rotational movement is performed in the up-and-down direction, the upper part of the cam arm (510) also moves in the up-and-down direction.

[0093] In this case, since the upper part of the cam arm (510) is hinged and the tip of the second hinge shaft (521) is fixed to the lower part of the pump shaft (251), the pump shaft (251) also moves up and down in response to the up and down movement of the cam arm (510).

[0094] When the pump shaft (251) moves up and down, it moves up and down without wobbling according to the guide of the sleeve bearing (370) supported in the central through hole of the body (110).

[0095] The above-mentioned pumping piston drive device (250) is first fixed to the body (110) by fastening a fixing screw (12) into a through hole (11a) provided in the housing (11) of the drive motor (10).

[0096] Next, the lower end of the cam arm (510) provided in the power conversion unit (500) is connected to the rotor (30) of the drive motor (10) using the first hinge shaft (520). In this case, when connecting the first hinge shaft (520), it is necessary to adjust the tightening strength so that the first bearing (530) can rotate smoothly.

[0097] After that, the upper part of the cam arm (510) is connected to the tip of the second hinge shaft (521) using the second hinge shaft (521) in the through hole of the pump shaft (251).

[0098] As described above, the air pump (1000) of the present invention is driven by a pumping piston drive device (250) and uses a pump shaft (251) that performs reciprocating linear motion to drive a single large pumping piston (300), thereby providing an air pump for an ergonomic motion seat with a small number of parts and a simple flow path structure, which results in high assembly productivity and high driving efficiency, and an excellent air pumping volume per minute (LPM) (L / min).

[0099] In addition, in the present invention, vibration and noise of the vehicle constituting the ergo-motion seat can be minimized by using an air pump by driving a large pumping piston (300) by a pump shaft (251) that performs reciprocating linear motion.

[0100] Although the present invention has been illustrated and described above with reference to specific preferred embodiments, the present invention is not limited to the embodiments described above, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the invention.

[0101] 10: Drive motor 11: Housing

[0102] 30: Rotor 31: Magnet

[0103] 32: Back York 40: Status

[0104] 41: Teeth 42: Back York

[0105] 43: Bobbin 44: Coil

[0106] 45: Status Core

[0107] 100: Housing 110: Body

[0108] 117: Actuator housing 118, 119: Pumping piston housing

[0109] 120: Drive unit cover 130: Pump cover

[0110] 134: Valve receiving space 135: Valve receiving projection

[0111] 136: Air outlet 250: Pumping piston drive device

[0112] 251: Pump shaft

[0113] 300: Pumping piston 310,400: Check valve

[0114] 330, 340: Euro 370: Sleeve bearing

[0115] 500: Power conversion unit 510: Cam arm

[0116] 511: Through hole 520, 521: Hinge axis

[0117] 539, 531: Bearing 540: Washer

[0118] 550: Step 1000: Air pump

[0119] The air pump for an ergonomic seat according to the present invention can be applied to control the amount of air in an air bag (air cell) to adjust the posture of the occupant.

Claims

1. A housing having an overall rectangular shape, having a space for accommodating a driving device inside the rear end and spaces for accommodating first and second pumping pistons inside the front end, and discharging compressed air from the front end to the air cell of the ergo-motion seat through an air discharge port; A drive motor that is housed in a drive device receiving space inside the above housing and generates rotational power from a rotor; A pump shaft supported to enable linear reciprocating motion in a drive unit receiving space inside the housing; A power conversion unit housed in the drive unit receiving space of the above housing, which receives rotational power from the above drive motor and converts the pump shaft into linear reciprocating motion; A pumping piston accommodated in the first and second pumping piston receiving spaces of the housing, with a central portion connected to the tip of the pump shaft to reciprocate, sucking in air from the outside of the housing and supplying compressed air to the tip; At least one first backflow prevention valve installed in the body of the pumping piston, which closes when the pumping piston rises and opens when the pumping piston descends; and An air pump for an ergonomic motion seat comprising: a second backflow prevention valve that is received within the valve receiving space of a valve receiving projection provided at the front end of the housing, opens when the pumping piston rises to discharge compressed air to the outside through an air discharge port, and closes when the pumping piston descends.

2. In Paragraph 1, An air pump for an ergonomic motion seat, wherein the above-described drive motor and power conversion unit form a pumping piston drive device that reciprocates the pump shaft using the rotational power of the drive motor.

3. In Paragraph 2, The above pumping piston drive device is A drive motor that is housed in a drive device receiving space inside the above housing and generates rotational power from a rotor; A pump shaft supported to enable linear reciprocating motion in a drive unit receiving space inside the housing; and An air pump for an ergonomic motion seat comprising: a power conversion unit that is housed in the drive unit receiving space of the housing and receives rotational power from the drive motor to convert the pump shaft into linear reciprocating motion.

4. In Paragraph 3, The above power conversion unit A cam arm with through holes formed on one side and the other side; First and second bearings inserted into and supported by through holes on the one side and the other side; A first hinge shaft, the front end of which passes through the first bearing and is coupled and fixed to a hinge shaft coupling hole formed in the back yoke of the drive motor, and the rear end of which is rotatably supported by the first bearing; and An air pump for an ergonomic motion seat comprising: a second hinge shaft, wherein the front end passes through the second bearing and is coupled and fixed to a coupling hole of the pump shaft, and the rear end is rotatably supported by the second bearing.

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