Integrated air pump for ergo motion seat

Abstract

The present invention relates to an integrated air pump for an Ergo motion seat, which is designed as an integrated type without separately assembling a driving motor and an air pumping portion so as to reduce the length of a shaft system, thereby minimizing vibrations. The integrated air pump according to the present invention comprises: a driving motor which generates and provides rotational power; an air pumping portion which supplies air to air cells for an Ergo motion seat by using the rotational power; an air pump body which is formed with a quadrangular box shape and has, in the quadrangular box, a partition wall for dividing the space into a front portion space accommodating the rear end portion of the air pumping portion and a back portion space accommodating part of the driving motor; and a motor cover accommodating and supporting the rear end portion of the driving motor, wherein the motor cover is fixed to the air pump body by a plurality of first fixing bolts fastened thereto from the partition wall of the air pump body.

Description

Integrated air pump for ergo motion seats

[0001] The present invention relates to an integrated air pump for an ergo motion seat, and more particularly, to an integrated air pump for an ergo motion seat, which is designed as an integrated pump without separate assembly of a driving motor and an air pumping unit, thereby shortening the length of the shaft system and minimizing vibration.

[0002] The Ergo Motion Seat features an internal air bladder to provide comfortable support for passengers. Furthermore, the Ergo Motion Seat adjusts the air pressure within the seat to provide optimal seating comfort tailored to the passenger and driver's body type and driving posture.

[0003] The above ergo motion seat is equipped with a total of seven air bladders: two in the bottom cushion, three in the backrest, and one in each side bolster, and adjusts the passenger's posture by controlling the amount of air in the bladders as needed.

[0004] The Ergo Motion Seat has a function that allows the passenger to directly set the desired cushioning, allowing the passenger to control the air pockets in the seat cushion and the air pockets in the backrest to the desired level.

[0005] Additionally, when setting the drive mode, the drive mode linkage technology is installed to change the seating position by adjusting the size of the air bladder, helping the driver to focus on driving in a lower posture in sports driving mode.

[0006] The Ergo Motion seat features a feature that allows passengers to customize the cushioning to their liking. The air pockets in the seat cushion inflate by approximately 10mm, and the air pockets in the backrest inflate by up to 30mm, allowing the passenger to adjust each area to their desired level. This feature can be controlled via a switch on the side of the seat and is also linked to the AVN monitor. The intuitiveness of the system allows for direct visibility of the operating area.

[0007] The lumbar support, bolster device, and multi-contour installed on the seat of the above ergo motion seat are each equipped with air cells that can be injected with air, thereby enabling the passenger to have a stable riding posture and enjoy the convenience of seat seating.

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

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

[0010] Korean Patent Publication No. 10-2020-0051936 (Patent Document 1) proposes a pneumatic pump having an integrated inlet check valve and outlet check valve 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] The pneumatic pump including the integrated check valve structure of Patent Document 1 minimizes the operating error of the integrated valve and minimizes the generation of vibration and noise during the air intake and exhaust process between the pneumatic pump and the air bladder.

[0012] In the pneumatic pump of the above patent document 1, when the cam and camshaft are rotated by the driving motor, the rotating plate connected to the front end of the camshaft also rotates, and 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 of which has 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 patent document 1 has an air pumping unit and a DC drive motor that provides rotational force to the unit manufactured separately and then assembled, so the overall size is large.

[0014] In addition, the above pneumatic pump fundamentally uses a DC drive motor to provide rotational force to the air pumping part, so it has poor durability against noise and vibration.

[0015] Moreover, the above-mentioned pneumatic pump has a structure that has very large vibrations structurally because it implements air pumping by unbalanced rotation of a rotating plate with a cam and camshaft, which are unbalanced shafts.

[0016] In addition, since the DC drive motor and the air pumping unit are manufactured separately and then assembled, there is a problem in that it is difficult to minimize the length of the rotational axis of the drive motor for rotating the cam of the air pumping unit, and thus it is difficult to minimize vibration.

[0017] Accordingly, the present invention has been proposed to solve the problems of the above-mentioned prior art, and its purpose is to provide an integrated air pump for an ergo motion seat that can minimize vibration by shortening the length of the shaft system by designing the drive motor and the air pumping unit as an integrated unit without separate assembly.

[0018] Another object of the present invention is to provide an integrated air pump for an ergo motion seat having a compact overall size and excellent assembly productivity by designing the drive motor and the air pumping unit as an integrated unit.

[0019] Another object of the present invention is to provide an integrated air pump for an ergo motion seat that can implement optimal conditions for filling pumping air by optimizing the rotational speed of a pumping piston rotation plate by using a BLDC motor as a driving motor, which is easy to control speed and has high durability against noise and vibration.

[0020] In order to achieve the above object, an integrated air pump for an ergo motion seat according to one feature of the present invention comprises: a driving motor that generates and provides rotational power; an air pumping unit that supplies air to an air cell for an ergo motion seat using the rotational power; an air pump body having a square cylinder shape and having a partition wall for dividing the inside of the square cylinder into a front space for accommodating a rear end of the air pumping unit and a rear space for accommodating a part of the driving motor; and a motor cover for accommodating and supporting a rear end of the driving motor; wherein the motor cover is characterized in that it is fixed to the air pump body by a plurality of first fixing bolts that are fastened from the partition wall of the air pump body.

[0021] The above driving motor includes a rotary shaft rotatably supported at both ends by first and second bearings respectively installed in the bulkhead and motor cover of the air pump body; a rotor formed on the outer periphery of the rotary shaft; and a stator disposed on the outer side of the rotor with an air gap and configured to generate a rotating magnetic field to rotate the rotor; wherein the stator has a back yoke having four fixed protrusions protruding from the outer periphery, and the plurality of first fixed bolts can pass through through holes formed in the four fixed protrusions.

[0022] The integrated air pump according to the present invention further includes first to third curved protrusions formed protrudingly on three of the four inner circumferences of each of the air pump body and the motor cover and having curved end surfaces; and a fourth flat protrusion formed protrudingly on the remaining one of the four inner circumferences and having a flat end surface; and the back yoke may include three curved outer circumferences in contact with the first to third curved protrusions and a flat outer circumference in contact with the flat end surface of the fourth flat protrusion.

[0023] In this case, the rotor includes a cylindrical magnet formed on the outer periphery of the rotation shaft, and the rotation shaft may be made of SM45C.

[0024] The air pumping unit comprises: a cam having a camshaft connected to a front end of the rotating shaft and installed at the front end in a position and direction where the rotation axis and the center axis are misaligned; a rotating plate having a rear end connected to the camshaft of the cam and having first to fourth corners that swing up and down in accordance with the rotation of the cam; first to fourth pumping pistons having one end connected to the first to fourth corners of the rotating plate and that are compressed or restored in accordance with the up and down swing of the rotating plate; a pumping piston housing that receives and supports the front ends of the first to fourth pumping pistons; a valve plate disposed at a front end of the pumping piston housing and having an intake port and an exhaust port formed therein; an integrated check valve mounted on the valve plate and having an intake valve communicating with the intake port and an exhaust valve communicating with the exhaust port; And a pump cover having a partition wall for dividing a first chamber communicating with the exhaust valve and a second chamber communicating with the intake valve, and an outlet communicating with the first chamber, which is positioned in front of the integrated check valve, and the cam and the rotary plate are positioned in the front space of the air pump body, and the air pump body may be provided with a plurality of intake holes for receiving external air from the outside into the second chamber.

[0025] In addition, the tip of the rotation shaft may be extended to the front space through the through hole of the bulkhead and connected to the cam of the air pumping unit.

[0026] The above air pumping unit can be fixed by a plurality of second fixing bolts whose tip ends pass through the through holes of the valve plate and the pumping piston housing from the pump cover and are fastened to the air pump body.

[0027] As described above, in the present invention, the air pump that supplies air to the air cell for the ergo motion seat is designed as an integrated unit without separate assembly of the drive motor and the air pumping unit, thereby shortening the length of the shaft system and minimizing vibration.

[0028] In addition, since the driving motor and the air pumping unit of the present invention are designed as an integrated unit, the overall size is compact and assembly productivity is excellent.

[0029] Moreover, in the present invention, a BLDC motor, which is easy to control speed and has high durability against noise and vibration, is adopted as a driving motor, thereby optimizing the rotational speed of the pumping piston and the rotating plate, thereby implementing optimal conditions for filling the pumping air.

[0030] FIGS. 1A and 1B are forward and rear perspective views, respectively, of an integrated air pump for an ergo motion seat according to a preferred embodiment of the present invention.

[0031] Figures 2 and 3 are a front view and a left side view, respectively, showing an integrated air pump according to a preferred embodiment of the present invention.

[0032] Figures 4a to 4c are cross-sectional views taken along lines AA, BB, and CC of Figure 3, respectively.

[0033] Figures 5a and 5b are exploded perspective views of the assembly of an integrated air pump according to a preferred embodiment of the present invention, respectively.

[0034] Figures 6a and 6b are fully exploded perspective views of an integrated air pump according to a preferred embodiment of the present invention, respectively.

[0035] FIG. 7a and FIG. 7b are longitudinal cross-sectional views of a drive motor of an integrated air pump according to the present invention, respectively. FIG. 7a illustrates a case where a back yoke is used in the rotor, and FIG. 7b illustrates a case where a back yoke is not used in the rotor.

[0036] Hereinafter, a preferred embodiment according to the present invention will be described with reference to the attached drawings.

[0037] In this process, the sizes and shapes of components depicted in the drawings may be exaggerated for clarity and convenience. Furthermore, terms specifically defined in consideration of the structure and operation of the present invention may vary depending on the intent or custom of the user or operator. Definitions of these terms should be based on the content throughout this specification.

[0038] The Ergo Motion Seat features internal air cells to provide comfortable support for passengers. Furthermore, the Ergo Motion Seat adjusts air pressure within the seat to provide optimal seating comfort tailored to the passenger's and driver's body types and driving posture.

[0039] The above ergo motion seat is equipped with a total of seven air bladders (air cells) - two in the bottom cushion, three in the backrest, and one in each side bolster - to control the amount of air in the air bladders (air cells) as needed to adjust the passenger's posture.

[0040] The pneumatic control system of the Ergo Motion Seat can control the pressure of the air cells by driving an air pump to inject air into each air cell or by exhausting the air that is filled in the air cell.

[0041] In the present invention, the air pump that supplies air to the air cell for the ergo motion seat is designed as an integrated pump without separate assembly of the drive motor and the air pumping unit, thereby shortening the length of the shaft system and minimizing vibration, and as a result, the overall size is compact and has excellent assembly productivity.

[0042] Referring to FIGS. 1 to 7, an integrated air pump (1000) for an ergo motion seat according to a preferred embodiment of the present invention has an overall square cylinder shape and largely includes a driving motor (100) that generates and provides rotational power and an air pumping unit (200) that supplies air to an air cell for an ergo motion seat using the rotational power.

[0043] The above-mentioned integrated air pump (1000) uses a square-shaped air pump body (11) located in the middle, has a drive motor (100) built into the rear end, and has an air pumping unit (200) built into the front end. A motor cover (12) that accommodates a portion of the drive motor (100) is coupled to the rear end of the air pump body (11) to form an end finish. A pumping piston housing (170), a valve plate (140), an integrated check valve (150), and a pump cover (160) are sequentially coupled to the front end of the air pump body (11).

[0044] As described above, the integrated air pump (1000) of the present invention has a structure in which the driving motor (100) and the air pumping unit (200) are integrated into one body.

[0045] The above air pump body (11) has a partition wall (11c) formed inside a square tube to separate the front and rear spaces. A central through hole is formed in the center of the partition wall (11c) through which the rotation shaft (60) of the driving motor (100) passes, and the rear end of the rotation shaft (60) is rotatably supported by a second bearing (62) installed in a groove (12b) of a second bearing housing (12d) formed inside the motor cover (12), and the front end of the rotation shaft (60) is rotatably supported by a first bearing (61) installed in a groove of a first bearing housing (11f) protruding into the rear end space of the partition wall (11c).

[0046] The above driving motor (100) includes a rotor (30) having a cylindrical structure formed on the outer periphery of the rotating shaft (60), a stator (40) arranged with an air gap on the outer side of the rotor (30) to generate a rotating magnetic field to rotate the rotor (30), and a printed circuit board (PCB) (50) on which a motor driving circuit is mounted.

[0047] A through hole (50a) necessary for the rotation shaft (60) to pass through is formed in the center of the printed circuit board (PCB) (50), and the outer shape is formed in a square shape so that the outer peripheral portion can be supported inside a square cylinder shape.

[0048] The rotor (30) above includes a back yoke (32) and a magnet (31) that serve as a magnetic circuit in a cylindrical structure that are sequentially laminated and formed on the outer periphery of the rotation shaft (60), as shown in FIG. 7b. The magnet (31) may be a ring-shaped magnet in which the N and S poles are multi-polarly divided and magnetized, or may be made of a plurality of N and S pole split magnet pieces.

[0049] However, when the material of the rotation shaft (60) of the rotor (30) is a carbon steel material for machine structures such as SM45C that can act as a magnetic circuit, it is also possible to form a magnet (31) directly on the outer periphery of the rotation shaft (60) without using a separate back yoke, as shown in Fig. 7a.

[0050] In the remaining drawings except for Fig. 7b, a magnet (31) is formed directly on the outer periphery of the rotation axis (60) without using a separate back yoke.

[0051] The stator (40) includes a stator core (45) having a plurality of teeth (41) formed in a “T” shape as shown in FIGS. 7a and 7b and a back yoke (42) interconnected with the plurality of teeth (41) to form a magnetic circuit; a bobbin (44) made of an insulating material integrally formed to surround an outer circumferential surface on which coils (43) of each of the plurality of teeth are wound; and a coil (43) wound on the outer circumferential surface of the bobbin (44).

[0052] In this case, the bobbin (44) is formed integrally with the stator support, and one terminal of three press fits (51a-51c) for electrically connecting the start lines of three coils (43) of the U, V, and W three-phase drive method to a printed circuit board (50) on which a motor drive circuit is mounted adjacent to the stator support can be installed.

[0053] The start lines of the three coils (43) are connected to the motor drive circuit of the printed circuit board (50) through three press fits (51a-51c).

[0054] Additionally, the bobbin (44) may be composed of upper and lower insulators or one-side and the other-side insulators assembled to surround the back yoke (42) from the upper and lower sides together with a plurality of teeth (41).

[0055] The above driving motor (100) is an inner rotor type motor of a radial gap type in which a stator (40) is arranged on the outside of a rotor (30), and may be formed as a BLDC (brushless DC) motor with a 12-pole-9-slot, 10-pole-9-slot, or 8-pole-6-slot structure.

[0056] The above driving motor (100) can be driven in a three-phase driving manner, and for this purpose, the coil (43) of the stator (40) can be wound on the teeth (41) in a U, V, W three-phase driving manner.

[0057] In this case, when the coil (43) of the stator (40) of the driving motor (100) is wound on a plurality of teeth (41), the coil (43) is wound in a U, V, W three-phase structure, and the other end of the U, V, W three-phase coil (43) can be connected in a Y-connection or star-connection manner.

[0058] Moreover, the drive motor (100) can be driven in a 6-step radio wave drive manner using an inverter after receiving a rotor position signal from two or three Hall sensors mounted on a Hall sensor assembly in a motor drive circuit mounted on the printed circuit board (50), for example.

[0059] In the illustrated embodiment, a printed circuit board (PCB) (50) having a motor drive circuit mounted thereon is installed inside the drive motor (100). However, the motor drive circuit is installed outside the integrated air pump (1000), and a Hall sensor assembly is mounted on the printed circuit board (PCB) (50) installed inside the housing, so that U, V, W output signals, three Hall sensor (Hall sensor) (H1 to H3) signals, Vcc, and GND are applied from the inverter circuit (not shown) of the motor drive circuit to the stator coil and Hall sensor assembly of the drive motor (100) through cables from the motor drive circuit installed outside.

[0060] On one side of the above motor cover (12), a slit (12c) is formed through which a cable for applying a control signal and power (Vcc, GND) from the system body to the printed circuit board (PCB) (50) of the above driving motor (100) passes.

[0061] The above stator core (45) has four fixing protrusions (42c) formed with through holes so that they can be fixed to the four corners of the air pump body (11) of a square cylinder structure on the outer periphery of the back yoke (42) that interconnects a plurality of teeth (41).

[0062] The above stator (40) can be fixed by a plurality of, for example, three or four, fixing bolts (13) whose leading end is fixed to the inner wall of the motor cover (12) from the bulkhead (11c).

[0063] Four through holes are formed at the four corners of the square bulkhead (11c) of the above air pump body (11), and a plurality of fixing bolt connecting projections (11e) are formed at the rear of the bulkhead (11c) to support fixing bolts by communicating with the four through holes (11b) at the four corners.

[0064] At the inner edge of the above motor cover (12), a fixing bolt engaging projection (12a) is formed to which, for example, the tip portions of three or four fixing bolts (13) are engaged and fixed.

[0065] The above stator (40) has four fixing protrusions (42c) formed in the center so that the back yoke (42) can be fixed to the four corners of the air pump body (11) having a square cylinder structure between three curved outer peripheral parts (42b) and a flat outer peripheral part (42a).

[0066] Accordingly, the stator (40) is fixed by fastening three or four fixing bolts (13) through the through-holes (11b) from the front of the bulkhead (11c) and through the through-holes of four fixing projections (42c) formed in the back yoke (42) to the fixing bolt engaging projections (12a) of the motor cover (12).

[0067] In addition, the air pump body (11) and the motor cover (12) each have three curved fixing protrusions (14a-14c) and a flat fixing protrusion (14d) protruding from each of the four inner surfaces, which contact the outer surface of the stator (40) back yoke (42).

[0068] In this case, the back yoke (42) facing the three curved fixing protrusions (14a-14c) has three curved outer peripheral portions (42b), and the back yoke (42) facing the flat fixing protrusion (14d) has a flat outer peripheral portion (42a).

[0069] As a result, the stator (40) is first assembled inside the air pump body (11), and when the motor cover (12) is coupled to the rear, the assembly position of the stator (40) is determined by contacting the flat outer peripheral portion (42a) of the back yoke (42) with the flat fixing protrusion (14d) of the air pump body (11) and the motor cover (12).

[0070] In addition, when a driving signal is applied to the stator coil (43) of the driving motor (100) and an electromagnet whose stimulation is periodically changed for each tooth on which the coil (43) is wound is formed to generate a rotating magnetic field, an attractive or repulsive force may be generated between the electromagnet and the magnet (31) of the rotor (30) facing the electromagnet, and accordingly, the stator (40) needs to be fixed to a preset position without movement when assembled inside the air pump body (11) and the motor cover (12).

[0071] Moreover, a pair of guide protrusions (15a, 15b) are formed inside the four corners of the air pump body (11) and the motor cover (12) to block the flow of the four fixed protrusions (42c) of the stator core (45).

[0072] As described above, the integrated air pump (1000) of the present invention uses an air pump body (11), has a drive motor (100) built into the rear end, and has an air pumping unit (200) built into the front end. A motor cover (12) coupled to the rear end of the air pump body (11) and accommodating a portion of the drive motor (100) is fixed by fastening a plurality of fixing bolts (13) through a through hole (11b) from the front of the partition wall (11c).

[0073] As a result, the integrated air pump (1000) of the present invention has a structure in which the drive motor (100) and the air pumping unit (200) are integrated into one body, thereby minimizing the length of the rotational shaft (60) of the drive motor (100), thereby shortening the length of the shaft system, thereby minimizing vibration, and has a compact overall size and excellent assembly productivity.

[0074] The above air pumping unit (200) comprises a cam (110) that receives rotational force from the rotational shaft (60) of the driving motor (100) and a camshaft (111) connected thereto, a rotation plate (120) that rotates while swinging up and down by the rotation of the camshaft (111), four pumping pistons (130-134) that are connected at the lower ends to four points of the rotation plate (120) and are inserted into and supported by four through holes of a pumping piston housing (170), a valve plate (140) that is arranged at the front end of the pumping piston housing (170) and for fixing an integrated check valve (150) that is arranged at the front end, four intake valves (151) that are arranged at the front end of the valve plate (140) and are installed on the outside and open when air is sucked into the pumping piston (130), and four intake valves (151) that are installed on the inside and open when air is sucked into the pumping piston (130) from the inside to the outside. It includes an integrated check valve (150) in which four exhaust valves (152) that open when exhausting air are installed and the intake valves (151) and the exhaust valves (152) are positioned so that they communicate with the internal space of the pumping piston (130), and a pump cover (160) that is positioned above the integrated check valve (150) and provides a seal for the intake valve (151) of the integrated check valve (150) while providing a first chamber (C1) for air discharged through the exhaust valve (152) and a second chamber (C2) for air sucked toward the intake valve (151).

[0075] The cam (110), camshaft (111), rotating plate (120), pumping piston (130) and pumping piston housing (170), valve plate (140), integrated check valve (150), and pump cover (160) constituting the above air pumping unit (200) are very similar in structure and air pumping operation to those disclosed in, for example, the above patent document 1. Therefore, a detailed description thereof is omitted.

[0076] The above air pumping unit (200) has an air outlet (i.e., air nipple) (161) formed in the center of the pump cover (160), and four through holes formed in the four side portions of the outer surface, into which fixing bolts (113) are fastened, are formed.

[0077] The air pumping unit (200) has a structure that is integrated into an integral part with the driving motor (100) by having the tip of the fixing bolt (113) fastened to a plurality of fixing bolt connecting protrusions (11a) formed on the inner periphery of the air pump body (11) through the through hole (172) of the valve plate (140) and the pumping piston housing (170) from the outside through the through hole of the cover (160).

[0078] The above air pumping unit (200) receives rotational force from the rotational shaft (60) of the driving motor (100) and has a cam (110) connected to one side of a camshaft (111) that transmits the rotational force. The camshaft (111) is installed at a position and in a direction where its center axis is misaligned with the rotational shaft (60), so that when the cam (110) rotates, the rotation plate (120) connected to the front end of the camshaft (111) rotates while swinging up and down.

[0079] The up-and-down rotating motion of the above-mentioned rotating plate (120) provides power to generate a pumping motion of four pumping pistons (131-134) whose lower ends are each connected to through holes (121-124) at four corners.

[0080] In this case, the four pumping pistons (131-134) are inserted from the upper side of the pumping piston housing (170) through four through holes (171) and then the upper part is supported on the pumping piston housing (170).

[0081] The above pumping piston (130) is made of rubber, and when the rotating plate (120) rotates while swinging up and down in accordance with the rotation of the cam (110), the four pumping pistons (131-134) mounted on the rotating plate (120) perform a pumping operation by alternately compressing and restoring.

[0082] A valve plate (140) is attached to the upper side of the pumping piston (130), an integrated check valve (150) is mounted on the upper side of the valve plate (140), and a pump cover (160) is placed on the upper side thereof.

[0083] The above-mentioned integrated check valve (150) is made of a material that can be elastically deformed, such as rubber, and both the intake valve (151) and the exhaust valve (152) are structures cut by an arc-shaped slit, and are made to have a step on either the upper or lower surface.

[0084] The above-mentioned integrated check valve (150) includes two types of check valves for exhaust and intake, and the four intake valves (151) located on the outside are opened when air is sucked into the pumping piston (130), and the four exhaust valves (152) located on the inside are opened when air is exhausted from the inside of the pumping piston (130) to the outside.

[0085] In addition, both the exhaust valve (152) and the intake valve (151) must be positioned so as to be in communication with the internal space of the pumping piston (130), and the exhaust valve (152) must be connected to an air discharge port (161) that discharges air toward the air cell side. In order to utilize space and compactify the pump, the exhaust valve (152) may be formed on the outside, and the intake valve (151) may be formed on the inside.

[0086] A connected passage is formed through the valve plate (140) and the integrated check valve (150) to receive external air into the second chamber (C2) to draw air into the pumping piston (130), and a plurality of intake holes (11d) are formed in the air pump body (11) to receive external air into the second chamber (C2).

[0087] The inside of the above pump cover (160) may include a partition wall for dividing the space into a first chamber (C1) for exhaust and a second chamber (C2) for intake.

[0088] Below, the air pumping operation of the air pumping unit (200) is described.

[0089] When the cam (110) receives rotational force from the rotation shaft (60) of the above driving motor (100), the camshaft (111) that rotates together with the cam (110) and the rotation plate (120) connected to the tip of the camshaft (111) also rotates while swinging up and down.

[0090] Accordingly, the up-and-down rotating motion of the above-mentioned rotating plate (120) provides power to generate a pumping motion of the four pumping pistons (130), and the four pumping pistons (130) perform a pumping motion by alternately compressing and restoring.

[0091] During the intake process, one of the four pumping pistons (130) is in a completely exhausted state, meaning that the pumping piston (130) has exhausted the air inside to the maximum extent.

[0092] In this case, the other pumping piston (130) facing the pumping piston (130) in the completely exhausted state is set to have its corresponding intake valve (151) open so that external air can be sucked in, and the external air introduced through the intake hole (11d) is introduced into the second chamber (C2) through the connecting passage formed in the valve plate (140) and the integrated check valve (150), and then the air is sucked into the pumping piston (130) in the intake state through the intake valve (151).

[0093] Thereafter, as the rotating plate (120) rotates, the pumping piston (130) in the fully exhausted state gradually descends and returns to its original shape, and the corresponding exhaust valve (152) switches to a closed state.

[0094] In addition, after the above intake stroke is completed, the pumping piston (130) in the intake state is gradually compressed according to the rotation of the rotating plate (120), and the exhaust stroke begins, so that the exhaust valve (152) opens and the intake valve (151) closes.

[0095] Accordingly, the internal air sucked into the pumping piston (130) in the intake state is discharged to the first chamber (C1) through the exhaust valve (152), and then finally discharged to the air bag (air cell) for the ergo motion seat through the air discharge port (161).

[0096] The integrated air pump (1000) according to the present invention has a compact overall size since the driving motor (100) and the air pumping unit (200) are designed as an integrated unit.

[0097] In the case of a conventional air pump in which the drive motor and air pumping part are manufactured separately and then assembled, the size is 36×91 mm in diameter × length, but the integrated air pump of the present invention can be manufactured in 36×70 mm in diameter × length.

[0098] As described above, in the air pump (1000) according to the present invention, the rotation plate (120) of the air pumping unit (200) rotates in accordance with the rotation of the driving motor (100), and the four pumping pistons (130) sequentially repeat compression and restoration, and in this process, intake and exhaust strokes are sequentially performed, thereby performing air pumping.

[0099] The driving motor (100) of the present invention is an inner rotor type motor of a radial gap type in which a stator (40) is arranged on the outside of a rotor (30), and can be formed as a BLDC (brushless DC) motor driven by a U, V, W three-phase driving method.

[0100] The above driving motor (100) can be driven in a 6-step radio wave driving manner using an inverter after receiving a rotor position signal from two or three Hall sensors mounted on a Hall sensor assembly in a motor driving circuit mounted on the printed circuit board (50).

[0101] As a result, the driving motor (100) is easy to control the speed of the motor, has high durability against noise and vibration, and can implement optimal conditions for filling the pumping air by optimizing the rotational speed of the pumping piston (130) and the rotating plate (120).

[0102] Although the present invention has been described and illustrated with specific preferred embodiments as examples, the present invention is not limited to the above embodiments, and various changes and modifications may be made by a person having ordinary skill in the art to which the invention pertains within a scope that does not depart from the spirit of the present invention.

[0103] An integrated air pump for an ergo motion seat according to the present invention is applied to an ergo motion seat and can adjust the passenger's posture by controlling the amount of air in an air bag (air cell).

Claims

1. A driving motor that generates and provides rotational power; An air pumping unit that supplies air to an air cell for an ergo motion seat using the above rotational power; An air pump body having a square cylinder shape and a partition wall for dividing the front space in which the rear end of the air pumping unit is accommodated and the rear space in which a part of the driving motor is accommodated inside the square cylinder; and A motor cover that accommodates and supports the rear end of the above driving motor; An integrated air pump for an ergo motion seat, wherein the motor cover is fixed to the air pump body by a plurality of first fixing bolts that are fastened from the bulkhead of the air pump body.

2. In paragraph 1, The above driving motor A rotary shaft rotatably supported at both ends by first and second bearings respectively installed on the bulkhead and motor cover of the above air pump body; A rotor formed on the outer periphery of the above rotating shaft; and A stator is disposed with an air gap on the outside of the rotor and generates a rotating magnetic field to drive the rotor to rotate; The above stator has a back yoke with four fixed projections protruding from the outer periphery, The above plurality of first fixing bolts are an integrated air pump for an ergo motion seat that passes through the through holes formed in the four fixing projections.

3. In paragraph 2, First to third curved protrusions having a curved cross-section and protruding on three of the four inner surfaces of each of the air pump body and motor cover; and It further includes a fourth flat protrusion formed protrudingly on one of the remaining four inner surfaces and having a flat cross-section; An integrated air pump for an ergo motion seat, wherein the back yoke includes three curved outer peripheral portions in contact with the first to third curved protrusion portions and a flat outer peripheral portion in contact with the leading edge surface of the plane of the fourth flat protrusion portion.

4. In paragraph 2, The above rotor includes a cylindrical magnet formed on the outer periphery of the rotation shaft, The above rotating shaft is an integrated air pump for the ergo motion seat made of SM45C.

5. In paragraph 1, The above air pumping part A cam having a camshaft connected to the tip of the above-mentioned rotary shaft and installed at the tip in a position and direction where the rotary shaft and the center axis are misaligned; A rotating plate having a rear end connected to the camshaft of the cam and having first to fourth corners that swing up and down according to the rotation of the cam; First to fourth pumping pistons, each having one end connected to the first to fourth corners of the rotating plate and configured to be compressed or restored according to the up-and-down movement of the rotating plate; A pumping piston housing that accommodates and supports the tip portions of the first to fourth pumping pistons; A valve plate disposed at the front end of the above pumping piston housing and having an intake hole and an exhaust hole formed therein; An integral check valve mounted on the valve plate and having an intake valve communicating with the intake port and an exhaust valve communicating with the exhaust port; and A pump cover having a partition wall for dividing a first chamber communicating with the exhaust valve and a second chamber communicating with the intake valve, and a discharge port communicating with the first chamber, located in front of the integrated check valve, The above cam and rotating plate are positioned in the front space of the air pump body, An integrated air pump for an ergo motion seat having a plurality of intake holes in the above air pump body for receiving external air from the outside into the second chamber.

6. In paragraph 5, An integrated air pump for an ergo motion seat, wherein the tip of the above-mentioned rotating shaft extends into the front space through the through hole of the above-mentioned bulkhead and is connected to the cam of the above-mentioned air pumping unit.

7. In paragraph 5, An integrated air pump for an ergo motion seat, wherein the air pumping unit is fixed by a plurality of second fixing bolts that pass through the through-holes of the valve plate and the pumping piston housing from the pump cover and are fastened to the air pump body.

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