Pulse blood oxygen detection device and method thereof

Abstract

The invention relates to the technical field of medical equipment, and provides a pulse blood oxygen detection device and a method thereof.The pulse blood oxygen detection device comprises a lower clamping cover and an upper clamping cover hinged to the lower clamping cover, the opposite faces of the lower clamping cover and the upper clamping cover are each provided with a clamping groove used for clamping a finger, and a detection module is arranged in the clamping groove of the lower clamping cover; a first motor driving the lower clamping cover to be opened and closed is fixed to one side of the tail of the lower clamping cover, and two pressing rods are fixed in a clamping groove of the upper clamping cover. The upper clamping cover is closed on the lower clamping cover to clamp a finger, so that pulse blood oxygen can be detected through the detection module, the two clamping mechanisms are in a loose state under extrusion of two pressing rods on the bottom surface of the upper clamping cover in the state, the periphery of the finger can be ventilated through work of the ventilation mechanism, air circulation is increased, and the safety of the finger is improved. Compared with the prior art, a ventilation mode is adopted in the detection process, so that the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a pulse oximetry detection device and method thereof. Background Art

[0002] The photosensitive sensor (receiving tube) in the pulse oximeter detects the transmitted light signal and calculates the blood oxygen saturation based on the different absorption rates of red light and infrared light on oxygenated hemoglobin and reduced hemoglobin. When the blood flow is large, the light absorption change caused by the change in the oxygenation state of hemoglobin also occurs. By measuring this change, the pulse oximeter can accurately calculate the oxygen saturation in the blood.

[0003] Most of the pulse oximeters on the market are finger-clip detectors. For example, the announcement number CN201929960U discloses a portable finger-clip non-invasive blood oxygen pulse detector, which consists of: a housing, an LCD screen, a keyboard, an electronic circuit board, a battery box, a power plug, a USB interface, an LD1 optical fiber, a finger-clip probe, an LD2 optical fiber, and a detection optical fiber. The front of the housing is provided with an LCD screen and a keyboard, and the back of the housing is provided with a battery box, a power plug, a USB interface, an LD1 optical fiber, an LD2 optical fiber, a detection optical fiber, and a finger-clip probe. The finger-clip probe consists of: a photodetector, LD1, and LD2. An electronic circuit board is installed in the housing. It is a photoelectric measuring device that does not need to penetrate blood vessels to measure the arterial blood oxygen saturation in the human body, avoiding the pain of penetrating blood vessels for patients. The phase-locked amplifier circuit has a filtering and amplification function, strong anti-interference ability, simple and accurate signal detection, simple structure, high reliability, low power consumption, and can be connected to a host computer to achieve signal storage and playback.

[0004] In actual use of existing pulse oximeters, the accuracy of pulse oximetry detection may be affected by many factors. In order to avoid errors when operating pulse oximetry detection, the following measures need to be taken: the fingers need to be cleaned before use, and water stains are likely to remain during cleaning, or the patient's fingers may sweat due to nervousness, so the fingers need to be wiped from time to time. In addition, to prevent long-term squeezing, medical staff or the patients themselves need to loosen their fingers from time to time or choose other fingers for testing, which increases the workload of medical staff. Summary of the invention

[0005] The present invention provides a pulse blood oxygen detection device and method thereof, which solves the problem of wiping the finger parts and requiring manual movement or position change in the prior art.

[0006] The technical scheme of the present invention is as follows: a pulse blood oxygen detection device, comprising a lower clamping cover and an upper clamping cover hinged on the lower clamping cover, wherein the lower clamping cover and the upper clamping cover are provided with clamping grooves for clamping fingers on opposite sides, a detection module is arranged in the clamping groove of the lower clamping cover, a motor for driving the lower clamping cover to open and close is fixed to one side of the tail of the lower clamping cover, two pressure rods are fixed in the clamping groove of the upper clamping cover, a clamping mechanism corresponding to the two pressure rods is arranged in the clamping groove of the lower clamping cover, and when the upper clamping cover is closed on the lower clamping cover, the two clamping mechanisms are squeezed by the two pressure rods respectively. When pressed down and opened to both sides, the two clamping mechanisms can clamp the fingers from both sides when the upper clamping cover is opened from the lower clamping cover. A ventilation mechanism for ventilating the area around the fingers and a transmission mechanism driven by the ventilation mechanism are arranged in the middle position of the tail of the lower clamping cover. An auxiliary mechanism for supporting the fingertips is arranged between the two clamping mechanisms. A lifting mechanism is arranged between the ventilation mechanism and the auxiliary mechanism, which performs lifting and lowering motion in cooperation with the transmission mechanism when the two clamping mechanisms clamp the fingers. The cooperation between the auxiliary mechanism and the lifting mechanism drives the fingertips to move up and down.

[0007] Preferably, the clamping mechanism includes a rocker arm, which includes a long rod section and a short rod section integrally connected to the long rod section. The proximal ends of the long rod section and the short rod section of the rocker arm are hinged to the lower clamping cover through a rotating shaft and a torsion spring is clamped at the hinge. A clamping column is fixed to the end of the short rod section of the rocker arm. An arc-shaped concave surface is provided on the proximal side of the clamping columns of the two clamping mechanisms, and a U-shaped fork is fixed to the end of the long rod section of the rocker arm.

[0008] Preferably, hinge seats are fixed on both sides of the tail of the lower clamping cover and the upper clamping cover, a pin is rotatably connected between the two hinge seats of the lower clamping cover, the hinge seat of the upper clamping cover is fixedly connected to the pin, the motor 1 is fixed in a hinge seat on one side of the lower clamping cover, and the output end of the motor 1 is fixedly connected to the pin.

[0009] Preferably, the two pressure rods are located between the short rod sections of the two swing rods, and the two swing rods tend to rotate toward the landing point of the two pressure rods under the elastic force of the torsion springs, and the diameters of the two pressure rods gradually decrease from top to bottom.

[0010] Preferably, the ventilation mechanism includes a shell, a hole is formed through the tail of the lower clamping cover, the shell is fixed outside the hole of the lower clamping cover, a second motor is fixed in the hole inside the shell, a fan blade is fixed on the output shaft of the second motor, and a worm is fixed to the end of the output shaft of the second motor.

[0011] The two wheels are connected with each other through the two guide rails, and the two guide rails are connected with each other through the two guide rails, and the two guide rails are connected with each other through the two guide rails.

[0012] Preferably, the sliding sleeve passes through the U-shaped fork transversely, and the first toothed disc abuts against the U-shaped fork under the elastic force of the spring.

[0013] Preferably, the lifting mechanism includes a lifting plate and slides fixed at both ends of the lifting plate, the two slides are vertically slidably connected to the lower clamping cover, one end of the two slides extends out of the lower clamping cover and is hinged to the connecting rod, and a pair of bar teeth are fixed on one side of the slide facing the auxiliary mechanism.

[0014] Preferably, the auxiliary mechanism includes two supports, both of which are fixed to the lower clamping cover, and both of the supports are hinged with a V-shaped frame, and the V-shaped frame is fixed with fan-shaped teeth meshing with bar teeth at the hinge with the support, and pressure wheels are fixed at both ends of the V-shaped frame, and a guard plate fixed to the two V-shaped frames is arranged between the two pressure wheels, and ventilation holes are opened on the lifting plate and the guard plate.

[0015] Based on the above device, the present invention also discloses a method for using the device, wherein the upper clamping cover is opened to a first working angle by operating the motor 1, a finger is extended into the clamping groove between the lower clamping cover and the upper clamping cover, and the finger is placed between the two clamping mechanisms, the finger tip is supported on the auxiliary mechanism, and then the upper clamping cover is closed on the lower clamping cover by the motor 1 to clamp the finger, so that the pulse blood oxygen can be detected by the detection module. In this state, the two clamping mechanisms are in a relaxed state under the compression of the two pressure rods on the bottom surface of the upper clamping cover, and the area around the finger can be ventilated by the operation of the ventilation mechanism; After a certain period of time, motor 1 opens the upper clamping cover to a second working angle which is greater than the first working angle and releases the part that originally clamped the finger. At the same time, the two pressure rods on the bottom surface of the upper clamping cover disengage from the two clamping mechanisms. The two clamping mechanisms clamp the sides of the finger inward from both sides to keep the finger on the lower clamping cover. While the two clamping mechanisms clamp the finger, they drive the transmission mechanism to drive the lifting mechanism to perform reciprocating lifting motion, and then the auxiliary mechanism drives the fingertips to move up and down under the cooperation of the auxiliary mechanism and the lifting mechanism.

[0016] The beneficial effects of the present invention are: In the present invention, the upper clamping cover is closed on the lower clamping cover to clamp the finger, so that the pulse blood oximeter can be detected through the detection module. In this state, the two clamping mechanisms are in a relaxed state under the compression of the two pressure rods on the bottom surface of the upper clamping cover, and the ventilation mechanism can be used to ventilate the area around the finger, thereby increasing the circulation of air to prevent sweat stains around the finger from affecting the detection result. Compared with the prior art, the present invention adopts ventilation in the detection process to improve the detection efficiency; In the present invention, after a certain period of detection, the motor 1 opens the upper clamping cover and releases the part originally clamping the finger, and at the same time, the two clamping mechanisms can clamp the finger from both sides to prevent the finger from being separated from the lower clamping cover, and at the same time, it is convenient to clamp the finger again by the motor 1 later. Compared with the prior art, the present invention does not need to manually change the finger for clamping, which reduces the difficulty of operation and reduces the workload of medical staff; When the two pressure rods on the bottom surface of the upper clamping cover in the present invention are separated from the two clamping mechanisms, the two clamping mechanisms clamp the sides of the fingers inward from both sides to keep the fingers on the lower clamping cover, and the two clamping mechanisms clamp the fingers while driving the transmission mechanism to drive the lifting mechanism to perform reciprocating lifting and lowering motions, and then the auxiliary mechanism drives the fingertips to move up and down under the cooperation of the auxiliary mechanism and the lifting mechanism. Compared with the prior art, the present invention can replace manual movement of the patient's finger parts to promote blood circulation and avoid blood stasis caused by long-term squeezing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 A schematic diagram of the structure of a pulse oximetry detection device and method proposed by the present invention; Figure 2 This is a schematic diagram of the lower clamping cover structure proposed by the present invention; Figure 3 This is a schematic diagram of the structure of the upper clamping cover and the mechanisms inside the upper clamping cover proposed by the present invention; Figure 4 This is a schematic diagram of the structure of each mechanism in the upper clamping cover proposed by the present invention; Figure 5 This is a schematic diagram of the ventilation mechanism structure proposed by the present invention; Figure 6 This is a schematic diagram of the structure of the clamping mechanism proposed by the present invention; Figure 7 It is a schematic diagram of the transmission mechanism structure proposed by the present invention; Figure 8 This is a schematic diagram of the auxiliary mechanism structure proposed by the present invention; Fig. 9 This is a schematic diagram of the lifting mechanism structure proposed by the present invention; In the figure: 1, lower clamping cover; 11, hinge seat; 12, pin shaft; 13, detection module; 2, upper clamping cover; 3, clamping groove; 4, pressure rod; 5, clamping mechanism; 51, swing rod; 52, clamping column; 53, rotating shaft; 54, torsion spring; 55, U-shaped fork; 6, ventilation mechanism; 61, housing; 62, motor 2; 63, fan blade; 64, worm; 7, transmission mechanism; 71, transmission rod; 710, support Frame; 72, worm gear; 73, sleeve; 74, first toothed disc; 75, convex ring; 76, spring; 77, spline rod; 78, second toothed disc; 79, connecting rod; 8, auxiliary mechanism; 81, support; 82, V-shaped frame; 83, sector teeth; 84, pressure wheel; 85, guard plate; 9, lifting mechanism; 91, slide plate; 92, lifting plate; 93, bar teeth; 94, air vent; 10, motor one. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 and Figure 2 The present invention provides a technical solution: a pulse oximeter detection device, comprising a lower clamping cover 1, and an upper clamping cover 2 hinged on the lower clamping cover 1, the lower clamping cover 1 and the upper clamping cover 2 are provided with a clamping groove 3 for clamping a finger on opposite sides, a detection module 13 is arranged in the clamping groove 3 of the lower clamping cover 1, a motor 10 for driving the lower clamping cover 1 to open and close is fixed to one side of the tail of the lower clamping cover 1, hinge seats 11 are fixed on both sides of the tail of the lower clamping cover 1 and the upper clamping cover 2, a pin shaft 12 is rotatably connected between the two hinge seats 11 of the lower clamping cover 1, the hinge seat 11 of the upper clamping cover 2 is fixedly connected to the pin shaft 12, the motor 10 is fixed in the hinge seat 11 on one side of the lower clamping cover 1, and the output end of the motor 10 is fixedly connected to the pin shaft 12.

[0021] See also Figure 2 , Figure 3 and Figure 4 Two pressure rods 4 are fixed in the clamping groove 3 of the upper clamping cover 2, and a clamping mechanism 5 corresponding to the two pressure rods 4 is arranged in the clamping groove 3 of the lower clamping cover 1. When the upper clamping cover 2 is closed on the lower clamping cover 1, the two clamping mechanisms 5 are respectively squeezed to both sides by the two pressure rods 4. When the upper clamping cover 2 is opened from the lower clamping cover 1, the two clamping mechanisms 5 can clamp the fingers from both sides. A ventilation mechanism 6 for ventilating the area around the fingers and a transmission mechanism 7 driven by the ventilation mechanism 6 are arranged in the middle position of the tail of the lower clamping cover 1. An auxiliary mechanism 8 for supporting the fingertips is arranged between the two clamping mechanisms 5. A lifting mechanism 9 is arranged between the ventilation mechanism 6 and the auxiliary mechanism 8, which performs a lifting movement in cooperation with the transmission mechanism 7 when the two clamping mechanisms 5 clamp the fingers. The cooperation between the auxiliary mechanism 8 and the lifting mechanism 9 drives the fingertips to move up and down.

[0022] See also Figure 4 and Figure 6 The clamping mechanism 5 includes a swing rod 51, which includes a long rod section and a short rod section integrally connected to the long rod section. The proximal ends of the long rod section and the short rod section of the swing rod 51 are hinged to the lower clamping cover 1 through a rotating shaft 53, and a torsion spring 54 is clamped at the hinge. A clamping column 52 is fixed to the end of the short rod section of the swing rod 51. The proximal sides of the clamping columns 52 of the two clamping mechanisms 5 are both provided with an arc-shaped concave surface. A U-shaped fork 55 is fixed to the end of the long rod section of the swing rod 51. The two pressure rods 4 are located between the short rod sections of the two swing rods 51. The two swing rods 51 tend to move toward the two pressure rods under the elastic force of the torsion spring 54. 4, the diameters of the two pressure rods 4 gradually decrease from top to bottom. When the upper clamping cover 2 and the lower clamping cover 1 are closed, the two pressure rods 4 on the bottom surface of the upper clamping cover 2 can squeeze the short rod sections of the two swing rods 51, so that the short rod sections of the two swing rods 51 are opened outward, thereby maintaining a certain gap with the fingers. When the upper clamping cover 2 is opened from the lower clamping cover 1, the two pressure rods 4 gradually separate from the short rod sections of the two swing rods 51. The two swing rods 51 tend to rotate toward the landing point of the two pressure rods 4 under the elastic force of the torsion springs 54, thereby clamping the fingers from both sides to prevent the fingers from separating from the lower clamping cover 1.

[0023] See also Figure 4 and Figure 5 The ventilation mechanism 6 includes a shell 61, a hole is penetrated through the tail of the lower clamping cover 1, the shell 61 is fixed outside the hole of the lower clamping cover 1, a motor 2 62 is fixed in the shell 61 and is located in the hole, a fan blade 63 is fixed on the output shaft of the motor 2 62, a worm 64 is fixed to the end of the output shaft of the motor 2 62, and the motor 2 62 can drive the fan blade 63 to rotate when it works, thereby increasing the circulation of air to prevent sweat stains around the fingers from affecting the detection results.

[0024] See also Figure 4 and Figure 7The transmission mechanism 7 includes a transmission rod 71, which is rotatably connected to two brackets 710. The two brackets 710 are fixed to the lower clamping cover 1. A worm wheel 72 fixed to the transmission rod 71 is arranged between the two brackets 710. The worm wheel 72 is meshed with the worm 64. Sliding sleeves 73 are arranged on the outer sides of both ends of the transmission rod 71. A spline rod 77 fixed to the end of the transmission rod 71 is slidably arranged in the sliding sleeve 73. A spline rod 77 fixed to the end of the transmission rod 71 is arranged between the sliding sleeve 73 and the bracket 710. The convex ring 75 of the sleeve 73 is elastically connected to the convex ring 75 through a spring 76. The end of the sleeve 73 away from the spring 76 is fixed with a first toothed disc 74. A through hole is penetrated through the lower clamping cover 1 on the opposite side of the first toothed disc 74, and a second toothed disc 78 is rotatably connected in the through hole. The first toothed disc 74 and the second toothed disc 78 are provided with annular teeth on the opposite side thereof that can bite each other when the two are fitted. The outer side of the second toothed disc 78 is hinged with a connecting rod 79, and the hinge connection between the connecting rod 79 and the second toothed disc 78 The center of the second toothed disc 78 is eccentrically arranged, and the sliding sleeve 73 passes through the U-shaped fork 55 horizontally. The first toothed disc 74 contacts the U-shaped fork 55 under the elastic force of the spring 76. When the motor 2 62 is working, the transmission rod 71 can be synchronously driven to rotate through the meshing action of the worm wheel 72 and the worm 64. When the upper clamping cover 2 and the lower clamping cover 1 are closed, the short rod sections of the two swing rods 51 are opened outward, and the U-shaped forks 55 of the two swing rods 51 tend to move inward, so that the first toothed disc 74 is pressed against the U-shaped fork 55 by the elastic force of the spring 76. The disc 74 maintains a certain distance from the second toothed disc 78, and when the upper clamping cover 2 is opened from the lower clamping cover 1, the two rocker arms 51 tend to rotate toward the landing point of the two pressure rods 4 under the elastic force of the torsion spring 54, thereby pushing the first toothed disc 74 to overcome the elastic force of the spring 76 and move outward until the first toothed disc 74 and the second toothed disc 78 are in contact with each other, and the annular teeth on the first toothed disc 74 and the second toothed disc 78 engage with each other, thereby driving the second toothed disc 78 to rotate synchronously with the first toothed disc 74.

[0025] See also Figure 4 and Fig. 9 The lifting mechanism 9 includes a lifting plate 92 and slide plates 91 fixed at both ends of the lifting plate 92. The two slide plates 91 are vertically slidably connected to the lower clamping cover 1. One end of the two slide plates 91 extends out of the lower clamping cover 1 and is hinged to the connecting rod 79. A pair of bar teeth 93 are fixed on the side of the slide plate 91 facing the auxiliary mechanism 8. The hinge point of the connecting rod 79 and the slide plate 91 is located directly above the center of the second toothed disc 78. The connecting rod 79 and the second toothed disc 78 constitute a crank-connecting rod system, which can drive the slide plate 91 to perform reciprocating lifting and lowering motion.

[0026] See also Figure 4 and Figure 8The auxiliary mechanism 8 includes two supports 81, both supports 81 are fixed to the lower clamping cover 1, and V-shaped frames 82 are hinged on the two supports 81. The V-shaped frame 82 is fixed with fan-shaped teeth 83 meshing with the bar-shaped teeth 93 at the hinge with the support 81. Pressing wheels 84 are fixed at both ends of the V-shaped frame 82. A guard plate 85 fixed to the two V-shaped frames 82 is arranged between the two pressing wheels 84. The guard plate 85 prevents fingers from contacting the transmission structure. The lifting plate 92 and the guard plate 85 are fixed to the lifting plate 92 and the guard plate 85. Air holes 94 are provided on both sides. When the slide plate 91 makes a reciprocating lifting and lowering motion, the engagement of the bar teeth 93 and the fan teeth 83 drives the V-shaped frame 82 to swing back and forth. When the V-shaped frame 82 swings upward, the fingertips are supported by the pressure wheel 84 at the bottom to bend upward. When the V-shaped frame 82 swings downward, the fingertips are pressed downward by the pressure wheel 84 at the top to bend downward. The continuous swinging of the V-shaped frame 82 can assist the fingers to move quickly, which is beneficial to blood circulation.

[0027] Based on the above embodiments, the present invention further proposes a method for using the detection device, wherein the upper clamping cover 2 is opened to a first working angle by the operation of a motor 10, and the opening degree of the first working angle is between 30-50 degrees, which can satisfy the requirement of placing a finger between the two clamping mechanisms 5, extending the finger into the clamping groove 3 between the lower clamping cover 1 and the upper clamping cover 2, and placing the finger between the two clamping mechanisms 5, with the fingertip supported on the auxiliary mechanism 8, and then closing the upper clamping cover 2 on the lower clamping cover 1 by the motor 10 to clamp the finger, so that the pulse blood oximeter can be detected by the detection module 13. In this state, the two clamping mechanisms 5 are in a relaxed state due to the squeezing of the two pressure rods 4 on the bottom surface of the upper clamping cover 2, and the area around the finger can be ventilated by the operation of the ventilation mechanism 6; After a certain period of time, the motor 10 opens the upper clamping cover 2 to a second working angle greater than the first working angle and releases the part that originally clamped the finger. The opening degree of the second working angle is between 70-90 degrees, and the two clamping mechanisms 5 can clamp the finger from both sides. At the same time, the two pressure rods 4 on the bottom surface of the upper clamping cover 2 are separated from the two clamping mechanisms 5. The two clamping mechanisms 5 clamp the sides of the finger inward from both sides to keep the finger on the lower clamping cover 1. While the two clamping mechanisms 5 clamp the finger, they drive the transmission mechanism 7 to drive the lifting mechanism 9 to perform reciprocating lifting motion, and then the auxiliary mechanism 8 is driven by the cooperation of the lifting mechanism 9 to drive the fingertips to move up and down.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pulse oximeter detection device, comprising a lower clamping cover (1), and an upper clamping cover (2) hinged on the lower clamping cover (1), wherein opposite sides of the lower clamping cover (1) and the upper clamping cover (2) are both provided with a clamping groove (3) for clamping a finger, and a detection module (13) is arranged in the clamping groove (3) of the lower clamping cover (1), characterized in that: A motor (10) is fixed on one side of the tail of the lower clamping cover (1) for driving the lower clamping cover (1) to open and close. Two pressure rods (4) are fixed in the clamping groove (3) of the upper clamping cover (2). A clamping mechanism (5) corresponding to the two pressure rods (4) is arranged in the clamping groove (3) of the lower clamping cover (1). When the upper clamping cover (2) is closed on the lower clamping cover (1), the two clamping mechanisms (5) are respectively pressed to both sides by the two pressure rods (4). When the upper clamping cover (2) is opened from the lower clamping cover (1), the two clamping mechanisms (5) can clamp the fingers from both sides. The lower clamping cover (1) is provided with a ventilation mechanism (6) for ventilating the area around the finger and a transmission mechanism (7) driven by the ventilation mechanism (6) at the middle position of the tail of the lower clamping cover (1); an auxiliary mechanism (8) for supporting the fingertip is provided between the two clamping mechanisms (5); a lifting mechanism (9) is provided between the ventilation mechanism (6) and the auxiliary mechanism (8) for performing lifting movement in cooperation with the transmission mechanism (7) when the two clamping mechanisms (5) clamp the finger; the auxiliary mechanism (8) and the lifting mechanism (9) cooperate to drive the fingertip to move up and down.

2. A pulse oximetry detection device according to claim 1, characterized in that: The clamping mechanism (5) comprises a swing rod (51), the swing rod (51) comprising a long rod section and a short rod section integrally connected to the long rod section. The proximal ends of the long rod section and the short rod section of the swing rod (51) are hinged to the lower clamping cover (1) via a rotating shaft (53), and a torsion spring (54) is clamped at the hinge. A clamping column (52) is fixed to the end of the short rod section of the swing rod (51). The proximal sides of the clamping columns (52) of the two clamping mechanisms (5) are both provided with an arc-shaped concave surface. A U-shaped fork (55) is fixed to the end of the long rod section of the swing rod (51).

3. A pulse oximetry detection device according to claim 1, characterized in that: Hinge seats (11) are fixed on both sides of the tail of the lower clamping cover (1) and the upper clamping cover (2); a pin shaft (12) is rotatably connected between the two hinge seats (11) of the lower clamping cover (1); the hinge seat (11) of the upper clamping cover (2) is fixedly connected to the pin shaft (12); the motor 1 (10) is fixed in the hinge seat (11) on one side of the lower clamping cover (1); and the output end of the motor 1 (10) is fixedly connected to the pin shaft (12).

4. A pulse oximetry detection device according to claim 2, characterized in that: The two pressure rods (4) are located between the short rod sections of the two swing rods (51); the two swing rods (51) tend to rotate towards the landing point of the two pressure rods (4) under the elastic force of the torsion spring (54); and the diameters of the two pressure rods (4) gradually decrease from top to bottom.

5. A pulse oximetry detection device according to claim 2, characterized in that: The ventilation mechanism (6) comprises a shell (61), a hole is formed through the tail of the lower clamping cover (1), the shell (61) is fixed outside the hole of the lower clamping cover (1), a second motor (62) is fixed inside the shell (61) and is located in the hole, a fan blade (63) is fixed on the output shaft of the second motor (62), and a worm (64) is fixed at the end of the output shaft of the second motor (62).

6. A pulse oximetry detection device according to claim 5, characterized in that: The transmission mechanism (7) comprises a transmission rod (71), the transmission rod (71) being rotatably connected to two brackets (710) on the outside, the two brackets (710) being fixed to the lower clamping cover (1), a worm wheel (72) fixed to the transmission rod (71) being arranged between the two brackets (710), the worm wheel (72) being meshed with the worm (64), sliding sleeves (73) being sleeved on the outer sides of both ends of the transmission rod (71), a spline rod (77) fixed to the end of the transmission rod (71) being slidably arranged in the sliding sleeve (73), and a convex ring (75) fixed to the transmission rod (71) being arranged between the sliding sleeve (73) and the bracket (710). ), the sliding sleeve (73) is elastically connected to the convex ring (75) through a spring (76), a first toothed disc (74) is fixed to one end of the sliding sleeve (73) away from the spring (76), a through hole is penetrated through the lower clamping cover (1) on the opposite side of the first toothed disc (74), and a second toothed disc (78) is rotatably connected in the through hole, and the first toothed disc (74) and the second toothed disc (78) are provided with annular teeth that can bite each other when the two are fitted together on the opposite side, and the outer side of the second toothed disc (78) is hinged with a connecting rod (79), and the center of the hinge point between the connecting rod (79) and the second toothed disc (78) is eccentrically arranged with the center of the second toothed disc (78).

7. A pulse oximetry detection device according to claim 6, characterized in that: The sliding sleeve (73) passes through the U-shaped fork (55) transversely, and the first toothed disc (74) abuts against the U-shaped fork (55) under the elastic force of the spring (76).

8. A pulse oximetry detection device according to claim 7, characterized in that: The lifting mechanism (9) comprises a lifting plate (92) and slide plates (91) fixed at both ends of the lifting plate (92), the two slide plates (91) being vertically slidably connected to the lower clamping cover (1), one end of the two slide plates (91) extending out of the lower clamping cover (1) and being hinged to the connecting rod (79), and a pair of bar teeth (93) being fixed on one side of the slide plate (91) facing the auxiliary mechanism (8).

9. A pulse oximetry detection device according to claim 8, characterized in that: The auxiliary mechanism (8) comprises two supports (81), the two supports (81) are fixed to the lower clamping cover (1), the two supports (81) are hinged with a V-shaped frame (82), the V-shaped frame (82) is fixed with a fan-shaped tooth (83) meshing with the bar-shaped tooth (93) at the hinge with the support (81), the two ends of the V-shaped frame (82) are fixed with a pressure wheel (84), a guard plate (85) fixed to the two V-shaped frames (82) is arranged between the two pressure wheels (84), and the lifting plate (92) and the guard plate (85) are both provided with a ventilation hole (94).

10. A method for using a detection device, according to the pulse oximetry detection device of claim 1, characterized in that: The upper clamping cover (2) is opened to a first working angle by operating the motor 1 (10), and a finger is extended into the clamping groove (3) between the lower clamping cover (1) and the upper clamping cover (2), and the finger is placed between the two clamping mechanisms (5). The finger tip is placed on the auxiliary mechanism (8), and then the upper clamping cover (2) is closed on the lower clamping cover (1) by the motor 1 (10) to clamp the finger, so that the pulse blood oxygen can be detected by the detection module (13). In this state, the two clamping mechanisms (5) are in a relaxed state due to the compression of the two pressure rods (4) on the bottom surface of the upper clamping cover (2), and the area around the finger can be ventilated by the operation of the ventilation mechanism (6); After a certain period of time, the motor 1 (10) opens the upper clamping cover (2) to a second working angle greater than the first working angle, thereby releasing the part originally clamping the finger. At the same time, the two pressure rods (4) on the bottom surface of the upper clamping cover (2) are separated from the two clamping mechanisms (5). The two clamping mechanisms (5) clamp the sides of the finger inward from both sides, so that the finger is kept on the lower clamping cover (1). While the two clamping mechanisms (5) clamp the finger, they drive the transmission mechanism (7) to drive the lifting mechanism (9) to perform reciprocating lifting motion, and then the auxiliary mechanism (8) drives the finger tip to move up and down in cooperation with the lifting mechanism (9).

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