Modular brush

A modular brush characterized by a first construction, a second construction, a third construction, or a fourth construction:

• wherein the first construction comprises:
• a ferrule (60) arranged at the end of a handle (10), a bristle-attaching portion (70), which is partially accommodated in the ferrule (60) and has bristles (71) on one side and any one of:
• a shaft (72) downwardly extending on a central lower surface of the bristle-attaching portion (70) or a plurality of bars (73) attaching to a lower surface of the bristle-attaching portion (70), wherein the shaft (72) or the plurality of bars (73) arc drawn downwardly of the ferrule (60) so that the bristle-attaching portion (70) can flex in a curved manner with respect to a center portion of the bristle-attaching portion (70) and the bristle-attaching portion (70) can be accommodated in the ferrule (60) with a diameter of the bristle-attaching portion (70) reduced, wherein the bristle-attaching portion (70) can flex in a curved manner with respect to the center portion of the portion of the bristle-attaching portion (70) and the bristle-attaching portion (70) can encase the shaft (72) outside the shaft (72) to further reduce a diameter of the bristle-attaching portion (70), wherein a tube (74) having a larger diameter than that of the shaft (72) is further provided and an end of the tube is fixed to a lever fixing portion (61) arranged in an inner wall of the ferrule (60), wherein a lever (62) is inserted into a guide hole (72a) (74a) formed in the shaft (72) and the tube (74) and configured to penetrate a guide hole (60a) formed in the ferrule (60) so that the lever (62) can move downward along the guide hole (60a) of the ferrule (60) and a position of the shaft (72) is temporarily maintained wherein the bar (73) and the tube (74) primarily move downward and the lever (62) pushes the shaft (72) with a reduced diameter of the bristle-attaching portion (70) so that the bristle-attaching portion (70) is inserted into an inner wall of the ferrule (60) without contact;
• wherein the second construction comprises:
• a track (63) having a groove shape configured along a perimeter of a ferrule (60), an adjuster-ring (64) provided with a pin (64a), which is configured to protrude inwardly wherein the pin (64a) is configured to insert into curved guide holes (72b) (74b) arranged on an outer surface of a shaft (72) and a tube (74) and the adjuster-ring (64) is adjusted with the pin (64a) inserted into the curved guide holes (72b) (74b) so that velocity of downward movement of the shaft (72) and the tube (74) is respectively adjusted according to a curved shape of the curved guide holes (72b) (74b), wherein a bristle-attaching portion (70) is inserted into the ferrule (60) with reduced diameter;
• wherein the third construction comprises:
• a shaft (72) provided with a plurality of bars (73), which are configured to extend outwardly of the shaft (72), wherein a tube (74) provided with a guide hole (74c), into which the plurality of bars (73) penetrates, so that the shaft (72) can upwardly or downwardly slide with constant distance, wherein a bristle attaching portion (70) is inserted into a ferrule (60) with retraction according to adjustment of polarity of moving magnetic bodies (39e) configured on one side of the shaft (72) and fixed magnetic bodies (39b) provided on a coupling (14) of a handle (10);
• and
• wherein the fourth construction comprises:
• a spring (76) arranged between a distance plate (65) provided at a center of a ferrule (60) and a stopper (75) configured by an outwardly protruding end of a shaft (72) wherein a bristle attaching portion (70) is connected with a coupling (14) with retraction so that the bristle attaching portion (70) can be inserted into the ferrule (60) with retraction due to the spring (76).