Abstract: A multi-audio stethoscope head comprising a head body (1) including a sound collecting surface (11), a vibrating diaphragm, and a fastener. The sound collecting surface (11) is provided with a sound guiding hole (16), and the fastener (3) is provided with an axial through hole (33), a fastener sidewall (31) for attaching to the head body (1), and a diaphragm pressing portion (32) for tightly attaching the vibrating diaphragm (2) to the head body (1). The vibrating diaphragm (2) is disposed between the diaphragm pressing portion (32) and the head body (1). Protruding poles (6) protruding toward the vibrating diaphragm (2) is arranged on the sound collecting surface (11) at the radially inner side of the through hole (33), and when the vibrating diaphragm (2) is not subject to external pressure, the vibrating diaphragm (2) is spaced from the protruding poles (6).

Abstract: A multi-audio stethoscope head comprising a head body (1) including a sound collecting surface (11), a vibrating diaphragm, and a fastener. The sound collecting surface (11) is provided with a sound guiding hole (16), and the fastener (3) is provided with an axial through hole (33), a fastener sidewall (31) for attaching to the head body (1), and a diaphragm pressing portion (32) for tightly attaching the vibrating diaphragm (2) to the head body (1). The vibrating diaphragm (2) is disposed between the diaphragm pressing portion (32) and the head body (1). Protruding poles (6) protruding toward the vibrating diaphragm (2) is arranged on the sound collecting surface (11) at the radially inner side of the through hole (33), and when the vibrating diaphragm (2) is not subject to external pressure, the vibrating diaphragm (2) is spaced from the protruding poles (6).

Abstract: Disclosed are a structure for automatically identifying a predetermined length of a tourniquet, and a method for quickly identifying the predetermined length. The structure for automatically identifying a predetermined length of a tourniquet comprises a box and tourniquets, wherein the box has at least one receiving cavity in which the tourniquets are placed and an opening configured to be passed through by an end of the tourniquets, wherein apertures are formed in the tourniquets at an interval of the predetermined length in a longitudinal direction of the tourniquets, the box is provided with a protrusion configured to cooperate with the apertures during the extraction of the tourniquets, and the apertures are configured to identify the predetermined length of the tourniquets and facilitate tearing off of the tourniquets during the tearing off of the tourniquets.

Abstract: Disclosed is a disposable sealed body fluid retention device, comprising a fluid storage pipe (1), a fluid-taking piece (2) and a shielding body (4), wherein the fluid storage pipe (1) comprises an opening part (11) and a fluid storage cavity (12); the fluid-taking piece (2) is provided with a fluid guide channel (21), an exhaust channel (22), an annular side wall (23) and a partition (28); the partition (28) is located in the annular side wall (23) and separates the fluid guide channel (21) from the exhaust channel (22); one end of the fluid guide channel (21) is provided with a fluid inlet (24) and the other end is provided with a fluid outlet (25); the fluid outlet (25) is located at the lower part of the fluid-taking piece (2); one end of the exhaust channel (22) is provided with an exhaust port (26) and the other end is provided with an air outlet (27); the exhaust port (26) is located at the lower part of the fluid-taking piece (2); and the shielding body (4) is located outside the fluid storage pipe (1

Abstract: Disclosed is a mating structure of a liquid extraction piece and a test tube assembly, which comprises the liquid extraction piece (1) and the test tube assembly (4). A test tube plug (2) is arranged at an opening end (32) of a test tube (3). The lower portion of the liquid extraction piece (1) is mated with the test tube assembly (4). The body of the test tube plug (2) is provided with a blocking body (25). The blocking body (25) is provided with a movable portion (253) and a fixed portion (252). The movable portion (253) can move with respect to the fixed portion (252). An axial recess is arranged above an upper surface (251) of the movable portion (253). The lower portion of the liquid extraction piece (1) is mated with the recess. The blocking body (25) is located in a lumen (31) of the test tube (3).

Abstract: Disclosed are a structure for automatically identifying a predetermined length of a tourniquet, and a method for quickly identifying the predetermined length. The structure for automatically identifying a predetermined length of a tourniquet comprises a box and tourniquets, wherein the box has at least one receiving cavity in which the tourniquets are placed and an opening configured to be passed through by an end of the tourniquets, wherein apertures are formed in the tourniquets at an interval of the predetermined length in a longitudinal direction of the tourniquets, the box is provided with a protrusion configured to cooperate with the apertures during the extraction of the tourniquets, and the apertures are configured to identify the predetermined length of the tourniquets and facilitate tearing off of the tourniquets during the tearing off of the tourniquets.

Abstract: A stethoscope head with adjustable audio frequency includes a head body, a diaphragm and a fastener. The diaphragm includes an annular step and a footing, and is disposed on a sound collecting surface on a front side of the head body and fixed on the head body by the fastener. An outer marginal part of a front side of the head body is provided with the annular step, and screw threads are provided on a step surface of the annular step. An annular groove is provided at the sound collecting surface inside the annular step. The inner surface of the annular groove and the bottom surface of annular recess form an obtuse angle ?. The diaphragm footing is disposed in the annular groove. The stethoscope head of the invention is convenient to assemble and the sound effect can be adjusted continuously.

Abstract: Disclosed is a mating structure of a liquid extraction piece and a test tube assembly, which comprises the liquid extraction piece (1) and the test tube assembly (4). A test tube plug (2) is arranged at an opening end (32) of a test tube (3). The lower portion of the liquid extraction piece (1) is mated with the test tube assembly (4). The body of the test tube plug (2) is provided with a blocking body (25). The blocking body (25) is provided with a movable portion (253) and a fixed portion (252). The movable portion (253) can move with respect to the fixed portion (252). An axial recess is arranged above an upper surface (251) of the movable portion (253). The lower portion of the liquid extraction piece (1) is mated with the recess. The blocking body (25) is located in a lumen (31) of the test tube (3).

Abstract: A stethoscope head with adjustable audio frequency, comprises: a head body having an annular step and a sound collecting surface at a front side of the head body; an annular fastener; and a diaphragm having an annular step and a footing, the diaphragm disposed on the sound collecting surface of the head body by the annular fastener which cooperates with the head body by screw threads, wherein, when the stethoscope head is in operation, the footing of the diaphragm is deformed in response to rotation of the annular fastener relative to the head body along the screw threads to regulate an audio frequency received by the diaphragm. The stethoscope head of the invention is convenient to assemble and the sound effect can be adjusted continuously.

Abstract: Disclosed is a disposable sealed body fluid retention device, comprising a fluid storage pipe (1), a fluid-taking piece (2) and a shielding body (4), wherein the fluid storage pipe (1) comprises an opening part (11) and a fluid storage cavity (12); the fluid-taking piece (2) is provided with a fluid guide channel (21), an exhaust channel (22), an annular side wall (23) and a partition (28); the partition (28) is located in the annular side wall (23) and separates the fluid guide channel (21) from the exhaust channel (22); one end of the fluid guide channel (21) is provided with a fluid inlet (24) and the other end is provided with a fluid outlet (25); the fluid outlet (25) is located at the lower part of the fluid-taking piece (2); one end of the exhaust channel (22) is provided with an exhaust port (26) and the other end is provided with an air outlet (27); the exhaust port (26) is located at the lower part of the fluid-taking piece (2); and the shielding body (4) is located outside the fluid storage pipe (1

Abstract: A detection head of a stethoscope comprises a detection head body (1, 2, 8) and a sound guiding conduit in the detection head body (1, 2). The sound guiding conduit comprises a sound collecting surface (12, 23), a sound guiding pore (D), and a lateral sound guiding aperture (4). The sound collecting surface (12, 23), the sound guiding pore (D), and the lateral sound guiding aperture (4) are disposed on the detection head body (1, 2, 8), and in combination with each other. At least a part of the detection head body (1, 2, 8) is made of a second density material. The density of the material of a sound guiding layer (3, 5, 6, 7, 9A) on the sound collecting surface (12, 23) is greater than that of the second density material.

Abstract: A detection head of a stethoscope comprises a detection head body (1, 2, 8) and a sound guiding conduit in the detection head body (1, 2). The sound guiding conduit comprises a sound collecting surface (12, 23), a sound guiding pore (D), and a lateral sound guiding aperture (4). The sound collecting surface (12, 23), the sound guiding pore (D), and the lateral sound guiding aperture (4) are disposed on the detection head body (1, 2, 8), and in combination with each other. At least a part of the detection head body (1, 2, 8) is made of a second density material. The density of the material of a sound guiding layer (3, 5, 6, 7, 9A) on the sound collecting surface (12, 23) is greater than that of the second density material.

Abstract: A stethoscope earplug seat and the fitting a fitted configuration with an earplug head thereof. The stethoscope earplug seat includes a large tubular body (6) and a small tubular body (5). The large tubular body (6) sheaths the outside of the small tubular body (5), and one side of the tube mouth of the large tubular body (6) is level with one side of the tube mouth of the small tubular body (5). The inside radius of the large tubular body (6) is equal to the outside radius of the small tubular body (5), the length of the large tubular body (6) is smaller than the length of the small tubular body (5), and the out-edge part of one side of the small tubular body (5) which is away from the large tubular body (6) is provided with an annular slot (7).