Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a dental floss pick comprising a handle part (11) and a head part (21), wherein the head part (21) is located at the top end of the handle part (11) and curves upwardly in a synclinal fashion from the handle part; the head part (21) has a first arm part (221) and a second arm part (222) symmetrically extending from the bottom end of the head part to the two sides, and a third arm part (223) and a fourth arm part (224) extending symmetrically from the top end of the head part (21) to the two sides; a first space (231) is formed between the ends of the first arm part (221) and the third arm part (223) and used for tightening a first section of dental floss (311), a second space (232) is formed between the ends of the third arm part (223) and the fourth arm part (224) and used for tightening a second section of dental floss (312), and a third space (233) is formed between the ends of the fourth arm part (224) and the second arm part (222) and used for tightening a third section of dental floss (313); and the first section of dental floss (311) and the third section of dental floss (313) are parallel to the lengthwise direction of the handle part (11), and the second section of dental floss (312) is perpendicular to the lengthwise direction of the handle part (11). The dental floss pick is ergonomically designed and can comprehensively and effectively clean teeth.
A: Disclosed is an automatic dental floss pick box, comprising a bottom shell (1), a cover plate (2) and an upper housing (3), wherein the bottom shell (1) is a rectangular tank with an opening in the upper surface thereof, and a front upper edge and a rear upper edge of the bottom shell (1) are respectively provided with an elongated outlet slot (4); the bottom shell (1) is internally provided with plastic buttons (5) and a movable support (6); the plastic buttons (5) are cylindrical rod bodies vertically mounted on the front surface and rear surface of the bottom shell (1); a spring (7) is sheathed on the rod body of each plastic button (5), the outer end of the plastic button (5) is exposed out of the bottom shell (1), and the inner end of the plastic button cooperates with the movable support (6); the movable support (6) is an L-shaped rod, with a short side thereof being thickened and protruding upwards and being perpendicular to the front surface and the rear surface of the bottom shell (1); the cover plate (2) is a plastic plate consistent with the bottom shell (1) in terms of shape, the cover plate (2) is clamped to an upper opening of the bottom shell (1) in an embedded manner, and the middle of the cover plate (2) is provided with rectangular strip-shaped notches (8) which are symmetrically arranged in parallel; ends of the strip-shaped notches (8) are close to a front edge and a rear edge of the cover plate (2), and the short side of the movable support (6) cooperates with the strip-shaped notches (8) and exposes the strip-shaped notches (8); the upper housing (3) is in the shape of a transparent rectangular columnar tank with a bottom opening, the bottom of the upper housing (3) cooperates with the cover plate (2), and symmetrically stacked dental floss picks are held in the upper housing (3); and the bottom dental floss picks are located on the upper surface of the short side of the movable support (6).
B: A handheld gimbal (100). The handheld gimbal (100) comprises a handheld part (10), a first shaft assembly (21), a second shaft assembly (22), a third shaft assembly (23), a rotary connection member (30), and a bearing part (231). The gimbal structure is mounted on the handheld part (10). The handheld gimbal (100) is able to switch between a folded state and an unfolded state. Under the folded state, the second shaft assembly (22), the third shaft assembly (23), and the bearing part (231) are located on the same horizontal side of the handheld part (10); under the unfolded state, the second shaft assembly (22), the third shaft assembly (23), and the bearing part (231) are located on the same vertical side of the handheld part (10). A rotating axis about which a first arm (211) and a second arm (212) rotate relatively is perpendicular to a length direction of the first arm (211). The volume after folding and storage is small, so that the handheld gimbal is in an easy-to-carry state, and portability requirements of consumers are satisfied. Moreover, the folding mode is simple and easy to operate, and can well satisfy user requirements.
C: A drawing force testing device (100) comprises a base (10), a thrust meter (30), and a press-fit mechanism (20). The base (10) comprises a bearing plate (11) and a stopper block 14, the bearing plate (11) being used for bearing a workpiece, and the stopper block (14) being provided on the bearing plate (11); the press-fit mechanism (20) comprises a fixed base (21), a first connecting piece (22), a second connecting piece (23), a third connecting piece (24), and a pressure head (25); the fixed base (21) is mounted on the bearing plate (11); the first connecting piece (22) comprises a mounting plate (221) and a bent portion (223); one end of the bent portion (223) close to the mounting plate (221) is rotationally connected to the fixed base (21); one end of the second connecting piece (23) is rotationally connected to one end of the fixed base (21) facing the outer side of the bearing plate (11); the third connecting piece (24) comprises a connecting portion (241) and a holding portion (243); the middle part of the connecting portion (241) is rotationally connected to a free end of the second connecting piece (23); a tail end of the connecting portion (241) is rotationally connected to the tail end of the bent portion (223); the pressure head (25) is provided at the tail end of the mounting plate (221); the thrust meter (30) is used for abutting against a part to be tested of the workpiece to enable the part to be separated from the workpiece to obtain the drawing force of the part. The drawing force testing device (100) is used for converting the drawing force into thrust force for measurement, and is simple in structure and convenient to measure.
D: A segmented cage (3) for a cylindrical roller bearing, comprising a plurality of independent cage units (31). The cage unit (31) comprises a base part (311) in the shape of a straight rod, a first retaining part (312) extending from an end portion of the base part (311), and a second retaining part (313) extending from the other end portion of the base part (311). The first retaining part (312) and the second retaining part (313) are in the shape of a bent rod; and a tail end portion of the first retaining part (312) and the tail end portion of the second retaining part (313) extend toward opposite directions. The technical solution provides a segmented cage featuring easy implementation and low costs, having both the cage rigidity and flexibility, and having a connection structure between itself and a roller. In addition, also provided are a cylindrical roller bearing using the segmented cage and a method for installing the cylindrical roller bearing.
Answer: A