A hand-held pulse oximeter

Abstract

The present invention belongs to the field of hand-held pulse oximeters, and specifically relates to a hand-held pulse oximeter, which includes a pulse oximeter main body, a connecting wire of the pulse oximeter main body, and a finger clamping mechanism is provided at one end of the wire. The finger clamping mechanism includes: a lower clamping plate, the lower clamping plate is fixedly connected to the wire, an upper clamping plate arranged above the lower clamping plate, a fixed sleeve arranged between the upper clamping plate and the lower clamping plate, a first spring arranged in the fixed sleeve, a movable plate movably installed at one end of the first spring, the movable plate is slidably connected to the inner cavity of the fixed sleeve, two groups of connecting rods symmetrically hinged on the movable plate, one end of one group of connecting rods is hinged to the lower clamping plate, one end of the other group of connecting rods is hinged to the upper clamping plate, a bearing plate movably installed at the other end of the first spring. Compared with the prior art, by rotating the screw rod, the position of the bearing plate is changed, so that the spring force in the initial state of the first spring can be adjusted, thereby realizing the adjustment of the clamping force of the lower clamping plate and the upper clamping plate on the finger, and avoiding being too loose or too tight.

Description

Technical Field

[0001] The present invention belongs to the field of handheld pulse oximeters, and more specifically, it is a handheld pulse oximeter. Background Art

[0002] Pulse oximeters provide a non-invasive method for measuring blood oxygen saturation or arterial hemoglobin saturation. Pulse oximeters can also detect arterial pulsations, and thus can calculate and inform the patient's heart rate. A pulse oximeter is a medical device that measures the oxygen content in a patient's arterial blood.

[0003] Publication No. CN218792251U discloses a handheld pulse oximeter with an anti-slip structure, which relates to the technical field of handheld pulse oximeters. To solve the problem that the existing device only adds a function of the pulse oximeter, but when the clamping block clamps the finger for detection, since the sizes of the clamping blocks are uniformly produced, and the sizes of people's fingers vary greatly, the clamping block may fall off the finger during detection, affecting the detection structure. It includes a pulse oximeter main body, an electronic display screen is arranged on the pulse oximeter main body, a battery installation compartment is arranged at the rear end of the pulse oximeter main body, a connecting cable is arranged on the pulse oximeter main body, and a finger clamping structure is arranged at one end of the connecting cable away from the pulse oximeter main body, and an expansion airbag is also included.

[0004] In the above solution, a splint is arranged on the resilient connecting shaft, and the splint is connected to the movable end on the resilient connecting shaft by welding. The arrangement of the splint can clamp the finger clamping structure on the finger by the elastic force provided by the spring on the resilient connecting shaft when the user uses the pulse oximeter. It can be seen that the finger clamping force is provided by the rebound force of the spring, and the magnitude of the rebound force of the spring is related to the thickness of the finger. Since the thicknesses of the fingers of users are different, the clamping forces of the clamping structure on fingers of different thicknesses are different, resulting in situations of being too loose or too tight, and the tightness cannot be adjusted, which will bring inconvenience to people when using the oximeter. Therefore, the present invention provides a handheld pulse oximeter. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A handheld pulse oximeter described in the present invention includes a pulse oximeter main body and a connecting wire of the pulse oximeter main body. One end of the wire is provided with a finger clamping mechanism, and the finger clamping mechanism includes: a lower clamping plate fixedly connected to the wire, an upper clamping plate arranged above the lower clamping plate, a fixing sleeve arranged between the upper clamping plate and the lower clamping plate, a first spring arranged in the fixing sleeve, a movable plate movably installed at one end of the first spring, the movable plate slidably connected to the inner cavity of the fixing sleeve, two groups of connecting rods symmetrically hinged on the movable plate, one end of one group of connecting rods hinged to the lower clamping plate, one end of the other group of connecting rods hinged to the upper clamping plate, a pressure bearing plate movably installed at the other end of the first spring, the pressure bearing plate slidably connected to the inner cavity of the fixing sleeve, a screw rod screwed to the pressure bearing plate, the end of the screw rod rotatably connected to the fixing sleeve, a detection cavity formed between the upper clamping plate and the lower clamping plate, two groups of installation grooves are opened on the upper and lower sides in the detection cavity, a light emitting diode assembly is arranged in one group of installation grooves, and a receiving transistor assembly is arranged in the other group of installation grooves. Two groups of rotating shafts are symmetrically arranged on both sides of the fixing sleeve, and both the upper clamping plate and the lower clamping plate are rotatably connected to the rotating shafts;

[0007] Compared with the prior art, by rotating the screw rod to change the position of the pressure bearing plate, the spring force in the initial state of the first spring can be adjusted, so as to realize the adjustment of the clamping force of the lower clamping plate and the upper clamping plate on the finger, and avoid being too loose or too tight.

[0008] Preferably, a plugging device is movably inserted into the detection cavity. The plugging device is used to plug and clean the detection cavity. The plugging device includes: a plug, the plug is movably inserted into the detection cavity, two groups of L-shaped pins symmetrically arranged on the plug, a driving mechanism arranged inside the plug, and two groups of dust-free cloths symmetrically arranged on the driving mechanism. The driving mechanism is used to drive the dust-free cloths. Two groups of limiting slots are symmetrically opened at the port part of the detection cavity, and the L-shaped pins are inserted into the limiting slots;

[0009] The plug drives the two groups of dust-free cloths to slide along the light emitting diode assembly and the receiving transistor assembly through the driving mechanism, and wipes off the fingerprints on the light emitting diode assembly and the receiving transistor assembly with the dust-free cloth until the L-shaped pins are inserted into the limiting slots. Since the plug is inserted into the detection cavity, dust is prevented from entering the detection cavity, and further dust is prevented from adhering to the light emitting diode assembly and the receiving transistor assembly.

[0010] Preferably, the driving mechanism includes: a button, the button is movably installed in the inner cavity of the plug, two groups of rectangular plates symmetrically arranged on the button, a receiving plate slidably connected to the rectangular plates, the dust-free cloth is adhered to the receiving plate, and a second spring sleeved on the button. A guiding groove is arranged on the receiving plate, the rectangular plates are slidably connected to the guiding groove, four groups of inclined chutes are symmetrically arranged on both sides in the guiding groove, and four groups of pin shafts are symmetrically arranged on both sides of the rectangular plates. The pin shafts are slidably connected to the inclined chutes;

[0011] Due to the spring force of the second spring blocking the receiving plate, a part of the extrusion force of the pin shaft pressing against the inner wall of the chute causes the receiving plate to move towards the diode component or the receiving transistor component, so that the two groups of dust-free cloths squeeze the diode component and the receiving transistor component, increasing the friction force between the dust-free cloth and the diode component and the receiving transistor component. At the same time, another part of the extrusion force of the pin shaft pressing against the inner wall of the chute drives the receiving plate together with the dust-free cloth to move axially, so that the dust-free cloth completely wipes off the fingerprints on the diode component and the receiving transistor component.

[0012] Preferably, a wire winding mechanism is arranged on the back side of the pulse oximeter main body. The wire winding mechanism is used to organize the wire and the finger clamping mechanism. The wire winding mechanism includes: a winding sleeve fixedly installed on the back side of the pulse oximeter main body, a placement groove arranged on the winding sleeve. The winding sleeve is used for winding the wire, and the placement groove is used for placing the finger clamping mechanism;

[0013] The wire is directly wound on the winding sleeve. When the wire is wound close to the end, the entire finger clamping mechanism is inserted into the placement groove. The operation is simple and convenient, which is convenient for the user to organize the wire and the finger clamping mechanism, thereby shortening the time used for organizing the wire and the finger clamping mechanism.

[0014] Preferably, the wire winding mechanism further includes: a limiting plate assembly for limiting the wire and the finger clamping mechanism. The limiting plate assembly includes: an L-shaped rotary connection plate, two groups of rotary connection grooves are symmetrically arranged on the winding sleeve, the L-shaped rotary connection plate is rotatably connected in the rotary connection groove, a first limiting plate fixedly connected to one end of the L-shaped rotary connection plate, a movable frame arranged at the other end of the L-shaped rotary connection plate, a U-shaped elastic sheet arranged on one side of the movable frame, and a second limiting plate fixedly connected to the movable frame. The U-shaped elastic sheet and the movable frame are both located in the rotary connection groove. The movable frame is slidably connected to the rotary connection groove. Rectangular sliding grooves are symmetrically arranged on both sides of the movable frame, and two groups of shafts 1 are symmetrically arranged on both sides of the other end of the L-shaped rotary connection plate. The shaft 1 is slidably connected to the rectangular sliding groove;

[0015] Push the two groups of first limiting plates to drive the L-shaped rotary connection plate to rotate by the first limiting plate, and the first limiting plate flips towards the back side of the pulse oximeter main body. Since the first limiting plate continuously flips towards the back side of the pulse oximeter main body, the first limiting plate will press the coiled wire to prevent the wire from becoming scattered. Secondly, the movable frame drives the second limiting plate to move, so that the second limiting plate extends to the port of the placement groove, thereby realizing the limitation of the finger clamping mechanism.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. When the lower splint and the upper splint clamp the finger too tightly, rotate the screw rod. As the screw rod rotates, the bearing plate will slide towards the bottom of the fixed sleeve, and gradually relieve the compression of the first spring. Therefore, the rebounding force received by the movable plate when compressing the first spring will become smaller, so that the force for the lower splint and the upper splint to clamp the finger will become smaller. Compared with the prior art, by rotating the screw rod and changing the position of the bearing plate, the spring force in the initial state of the first spring can be adjusted, so as to realize the adjustment of the clamping force of the lower splint and the upper splint on the finger, and avoid being too loose or too tight.

[0018] 2. After the detection is completed, insert the plug into the detection cavity. As the plug moves along the detection cavity, the plug drives two groups of dust-free cloths to slide along the light-emitting diode assembly and the receiving transistor assembly through the driving mechanism, and wipes off the fingerprints on the light-emitting diode assembly and the receiving transistor assembly with the dust-free cloth until the L-shaped pin is inserted into the limit slot. Since the plug is inserted into the detection cavity, dust is prevented from entering the detection cavity, and further prevented from adhering to the light-emitting diode assembly and the receiving transistor assembly.

[0019] 3. Continue to press the button. The button and two groups of rectangular plates move along the inner cavity of the plug. At the same time, the rectangular plates slide along the guide grooves, and the rectangular plates drive the pin shafts to slide along the inclined chutes. Since the bearing plate is blocked by the spring force of the second spring, a part of the extrusion force of the pin shaft pressing against the inner wall of the chute causes the bearing plate to move towards the diode assembly or the receiving transistor assembly, so that the two groups of dust-free cloths squeeze the diode assembly and the receiving transistor assembly, increasing the friction between the dust-free cloth and the diode assembly and the receiving transistor assembly. At the same time, another part of the extrusion force of the pin shaft pressing against the inner wall of the chute drives the bearing plate and the dust-free cloth to move axially, so that the dust-free cloth completely wipes off the fingerprints on the diode assembly and the receiving transistor assembly.

[0020] 4. When organizing the wire and the finger clamping mechanism, directly wind the wire around the winding sleeve. When the wire is wound close to the end, insert the entire finger clamping mechanism into the placement groove. The operation is simple and convenient, facilitating the user to organize the wire and the finger clamping mechanism, thus shortening the time used for organizing the wire and the finger clamping mechanism.

[0021] 5. Push the two groups of first limit plates, so that the first limit plates drive the L-shaped rotary connection plate to rotate, and the first limit plates flip towards the dorsal side of the pulse oximeter main body. At the same time, the first shaft at the other end of the L-shaped rotary connection plate will slide along the rectangular chute, and squeeze the inner wall of the rectangular chute, so that the movable frame slides along the rectangular chute and compresses the U-shaped elastic piece until, under the rebounding force of the U-shaped elastic piece, the chute wall of the rectangular chute will resist the first shaft to maintain the rotating posture of the L-shaped rotary connection plate. Since the first limit plates continuously flip towards the dorsal side of the pulse oximeter main body, the first limit plates will press the coiled wire, preventing the wire from becoming scattered. Secondly, the movable frame drives the second limit plate to move, so that the second limit plate extends to the port of the placement groove, thereby realizing the limitation of the finger clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a schematic structural diagram of the present invention.

[0024] Figure 2 It is a combined schematic diagram of the wire and the finger clamping mechanism of the present invention.

[0025] Figure 3 It is a schematic cross-sectional view of the finger clamping mechanism of the present invention.

[0026] Figure 4 It is a combined schematic diagram of the finger clamping mechanism and the plugging device of the present invention.

[0027] Figure 5 It is a combined schematic cross-sectional view of the upper clamping plate, the lower clamping plate, the light-emitting diode component, the receiving transistor component, and the plugging device of the present invention.

[0028] Figure 6 It is a combined schematic diagram of the plug, the button, the rectangular plate, the receiving plate, and the dust-free cloth in the cross-section of the present invention.

[0029] Figure 7 It is a combined schematic diagram of the pulse oximeter main body and the wire winding mechanism of the present invention.

[0030] Figure 8 It is a schematic cross-sectional view of the wire winding mechanism of the present invention.

[0031] Figure 9 It is Figure 8 the enlarged view at A in

[0032] Figure 10 It is a combined schematic diagram of the L-shaped rotary connection plate and the movable frame of the present invention.

[0033] In the figure: 1. Pulse oximeter main body; 2. Wire; 3. Finger clamping mechanism; 4. Sealing device; 5. Wire winding mechanism; 301. Upper clamping plate; 302. Lower clamping plate; 303. Fixed sleeve; 3031. Rotary connection shaft; 304. First spring; 305. Movable plate; 306. Connecting rod; 307. Bearing plate; 308. Screw rod; 309. Detection cavity; 3091. Limit slot; 310. Installation groove; 311. Light emitting diode assembly; 312. Receiving transistor assembly; 401. Plug; 402. L-shaped pin; 403. Driving mechanism; 404. Dust-free cloth; 4031. Button; 4032. Rectangular plate; 321. Pin shaft; 4033. Bearing plate; 331. Guide groove; 332. Oblique chute; 4034. Second spring; 501. Winding sleeve; 5011. Rotary connection groove; 502. Placement groove; 503. Limit plate assembly; 5031. L-shaped rotary connection plate; 313. Shaft one; 5032. First limit plate; 5033. Movable frame; 331. Rectangular chute; 5034. U-shaped elastic piece; 5035. Second limit plate. Embodiment

[0034] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments. Embodiment 1

[0035] As Figures 1 to 3 shown, a handheld pulse oximeter according to an embodiment of the present invention includes a pulse oximeter main body 1. The pulse oximeter main body 1 is connected to a wire 2. One end of the wire 2 is provided with a finger clamping mechanism 3. The finger clamping mechanism 3 includes: a lower clamping plate 302, the lower clamping plate 302 is fixedly connected to the wire 2, an upper clamping plate 301 arranged above the lower clamping plate 302, a fixed sleeve 303 arranged between the upper clamping plate 301 and the lower clamping plate 302, a first spring 304 arranged in the fixed sleeve 303, a movable plate 305 movably installed at one end of the first spring 304, the movable plate 305 is slidably connected to the inner cavity of the fixed sleeve 303, two groups of connecting rods 306 symmetrically hinged on the movable plate 305, one end of one group of connecting rods 306 is hinged to the lower clamping plate 302, one end of the other group of connecting rods 306 is hinged to the upper clamping plate 301, a bearing plate 307 movably installed at the other end of the first spring 304, the bearing plate 307 is slidably connected to the inner cavity of the fixed sleeve 303, a screw rod 308 screwed to the bearing plate 307, the end of the screw rod 308 is rotatably connected to the fixed sleeve 303. A detection cavity 309 is formed between the upper clamping plate 301 and the lower clamping plate 302. Two groups of installation grooves 310 are opened on the upper and lower sides in the detection cavity 309. A light emitting diode assembly 311 is arranged in one group of installation grooves 310, and a receiving transistor assembly 312 is arranged in the other group of installation grooves 310. Two groups of rotary connection shafts 3031 are symmetrically arranged on both sides of the fixed sleeve 303. The upper clamping plate 301 and the lower clamping plate 302 are both rotatably connected to the rotary connection shafts 3031.

[0036] Specifically, in the initial state, the upper clamping plate 301 and the lower clamping plate 302 are closed, the first spring 304 is in a compressed state, the light-emitting diode assembly 311, the receiving transistor assembly 312 are electrically connected to the wire 2. When in use, the user presses the lower clamping plate 302 and the upper clamping plate 301 towards each other with one hand, so that the lower clamping plate 302 and the upper clamping plate 301 rotate around the rotary connection shaft 3031. At the same time, the lower clamping plate 302 and the upper clamping plate 301 drive the corresponding connecting rod 306, and the connecting rod 306 pushes the movable plate 305 to slide along the inner cavity of the fixed sleeve 303, and further compresses the first spring 304. As the lower clamping plate 302 and the upper clamping plate 301 rotate, the detection cavity 309 will open. At this time, the user puts a finger into the detection cavity 309, releases the lower clamping plate 302 and the upper clamping plate 301. Under the action of the rebounding force of the first spring 304, the upper clamping plate 301 and the lower clamping plate 302 return to the initial state and clamp the finger, so that the light-emitting diode assembly 311 and the receiving transistor assembly 312 can closely adhere to the user's finger. The light-emitting diode assembly 311 irradiates light on the finger, and the receiving transistor assembly 312 receives the optical signal after the light is absorbed by the finger. The optical signal is transmitted to the pulse oximeter main body 1 through the wire 2. The pulse oximeter main body 1 obtains the pulse wave signal according to the intensity of the optical signal, and obtains the detection results of the pulse rate, blood oxygen and heart rate variability based on the pulse wave signal. Secondly, when the lower clamping plate 302 and the upper clamping plate 301 clamp the finger too tightly, rotate the screw 308. As the screw 308 rotates, the bearing plate 307 will slide towards the bottom of the fixed sleeve 303, and gradually relieve the compression of the first spring 304. Therefore, the rebounding force received by the movable plate 305 compressing the first spring 304 will become smaller, so that the force of the lower clamping plate 302 and the upper clamping plate 301 clamping the finger becomes smaller. Compared with the prior art, by rotating the screw 308 and changing the position of the bearing plate 307, the spring force of the first spring 304 in the initial state can be adjusted, so as to realize the adjustment of the clamping force of the lower clamping plate 302 and the upper clamping plate 301 on the finger, and avoid being too loose or too tight.

[0037] As Figure 4 shown, a plugging device 4 is movably inserted into the detection cavity 309. The plugging device 4 is used for plugging and cleaning the detection cavity 309. The plugging device 4 includes: a plug 401, the plug 401 is movably inserted into the detection cavity 309, two groups of L-shaped pins 402 symmetrically arranged on the plug 401, a driving mechanism 403 arranged inside the plug 401, and two groups of dust-free cloths 404 symmetrically arranged on the driving mechanism 403. The driving mechanism 403 is used to drive the dust-free cloth 404. Two groups of limit slots 3091 are symmetrically opened at the port part of the detection cavity 309, and the L-shaped pins 402 are inserted into the limit slots 3091.

[0038] Specifically, after the above-mentioned finger tightening mechanism 3 is used, since the detection cavity 309 is open, dust can easily enter the detection cavity 309, causing the dust to adhere to the light-emitting diode component 311 and the receiving transistor component 312. Secondly, since the light-emitting diode component 311 and the receiving transistor component 312 are close to the finger, fingerprints will be left on the contact surface between the light-emitting diode component 311, the receiving transistor component 312 and the finger. If they are not cleaned, the accuracy of the next detection will be affected. Therefore, after the detection is completed, the plug 401 is inserted into the detection cavity 309, and then As the plug 401 moves along the detection cavity 309, the plug 401 drives two sets of dust-free cloths 404 to slide along the light-emitting diode component 311 and the receiving transistor component 312 through the driving mechanism 403, and the fingerprints on the light-emitting diode component 311 and the receiving transistor component 312 are wiped off by the dust-free cloth 404 until the L-shaped pin 402 is inserted into the limiting slot 3091. Since the plug 401 is inserted into the detection cavity 309, dust is prevented from entering the detection cavity 309, thereby preventing dust from adhering to the light-emitting diode component 311 and the receiving transistor component 312.

[0039] like Figure 5 and Figure 6 As shown, the driving mechanism 403 includes: a button 4031, the button 4031 is movably installed in the inner cavity of the plug 401, two groups of rectangular plates 4032 are symmetrically arranged on the button 4031, a receiving plate 4033 slidably connected to the rectangular plate 4032, the dust-free cloth 404 is adhered to the receiving plate 4033, and a second spring 4034 is sleeved on the button 4031, a guide groove is arranged on the receiving plate 4033, the rectangular plate 4032 is slidably connected to the guide groove 331, four groups of oblique sliding grooves 332 are symmetrically arranged on both sides of the guide groove 331, four groups of pins 321 are symmetrically arranged on both sides of the rectangular plate 4032, and the pins 321 are slidably connected to the oblique sliding grooves 332.

[0040] Specifically, the above-mentioned lint-free cloth 404 wipes off fingerprints by moving while adhering to the diode component 311 and the receiving transistor component 312. However, due to the limited adhesion force of the lint-free cloth 404 to the diode component 311 and the receiving transistor component 312, the frictional force is small, and the fingerprints on the diode component 311 and the receiving transistor component 312 cannot be completely and thoroughly removed. Therefore, after the plug 401 is inserted into the detection cavity 309, the button 4031 is continuously pressed. The button 4031 and the two sets of rectangular plates 4032 move along the inner cavity of the plug 401. At the same time, the rectangular plates 4032 slide along the guiding grooves, and the rectangular plates 4032 drive the pin shafts 321 to slide along the inclined sliding grooves 332. Since the receiving plate 4033 is blocked by the spring force of the second spring 4034, a part of the extrusion force of the pin shafts 321 pressing against the inner wall of the sliding groove 332 causes the receiving plate 4033 to move towards the diode component 311 or the receiving transistor component 312, so that the two sets of lint-free cloths 404 squeeze the diode component 311 and the receiving transistor component 312, increasing the frictional force between the lint-free cloth 404 and the diode component 311 and the receiving transistor component 312. At the same time, another part of the extrusion force of the pin shafts 321 pressing against the inner wall of the sliding groove 332 drives the receiving plate 4033 and the lint-free cloth 404 to move axially, so that the lint-free cloth 404 completely wipes off the fingerprints on the diode component 311 and the receiving transistor component 312.

[0041] As shown in Fig. 7, a wire winding mechanism 5 is provided on the dorsal side of the pulse oximeter main body 1. The wire winding mechanism 5 is used to organize the wire 2 and the finger clamping mechanism 3. The wire winding mechanism 5 includes: a winding sleeve 501 fixedly installed on the dorsal side of the pulse oximeter main body 1, a placement groove 502 provided on the winding sleeve 501. The winding sleeve 501 is used to wind the wire 2, and the placement groove 502 is used to place the finger clamping mechanism 3.

[0042] Specifically, after cleaning the fingerprints on the diode component 311 and the receiving transistor component 312, the user needs to organize the wire 2 and the finger clamping mechanism 3 for easy storage of the wire 2 and the finger clamping mechanism 3. Since the length of the wire 2 is relatively long, it takes a long time to manually coil and organize it. Secondly, since the finger clamping mechanism 3 is fixedly connected to the wire 2, when organizing, in order to avoid the finger clamping mechanism 3 from swinging, the finger clamping mechanism 3 needs to be tied to the wire 2, which further prolongs the time for organizing. Therefore, when organizing the wire 2 and the finger clamping mechanism 3, the wire 2 is directly wound around the winding sleeve 501. When the wire 2 is wound close to the end, the entire finger clamping mechanism 3 is inserted into the placement groove 502. The operation is simple and convenient, facilitating the user to organize the wire 2 and the finger clamping mechanism 3, thereby shortening the time used for organizing the wire 2 and the finger clamping mechanism 3. Embodiment 2

[0043] As Figures 8 to 10As shown in the figure, compared with the first comparative example, another implementation manner of the present invention is that the wire winding mechanism 5 further includes: a limit plate assembly 503 for limiting the wire 2 and the finger clamping mechanism 3. The limit plate assembly 503 includes: an L-shaped rotary connection plate 5031, two groups of rotary connection grooves 5011 are symmetrically arranged on the winding sleeve 501, the L-shaped rotary connection plate 5031 is rotatably connected in the rotary connection groove 5011, a first limit plate 5032 fixedly connected to one end of the L-shaped rotary connection plate 5031, a movable frame 5033 arranged at the other end of the L-shaped rotary connection plate 5031, a U-shaped elastic piece 5034 arranged on one side of the movable frame 5033, and a second limit plate 5035 fixedly connected to the movable frame 5033. The U-shaped elastic piece 5034 and the movable frame 5033 are both located in the rotary connection groove 5011, the movable frame 5033 is slidably connected to the rotary connection groove 5011, rectangular sliding grooves 333 are symmetrically opened on both sides of the movable frame 5033, and two groups of shaft one 313 are symmetrically arranged on both sides of the other end of the L-shaped rotary connection plate 5031, and the shaft one 313 is slidably connected to the rectangular sliding groove 333.

[0044] Specifically, the U-shaped elastic piece 5034 is made of elastic stainless steel. After the wire 2 is wound around the winding sleeve 501 and the finger clamping mechanism 3 is inserted into the placement groove 502, if the coiled wire 2 and the finger clamping mechanism 3 are not limited, during the handling process, the coiled wire 2 is very likely to become loose, and the finger clamping mechanism 3 has the risk of detaching from the placement groove 502. Therefore, after the finger clamping mechanism 3 is inserted into the placement groove 502, the two first limit plates 5032 are pushed simultaneously, so that the first limit plate 5032 drives the L-shaped rotary connection plate 5031 to rotate, and the first limit plate 5032 flips towards the back side of the pulse oximeter main body 1. At the same time, the shaft one 313 at the other end of the L-shaped rotary connection plate 5031 will slide along the rectangular sliding groove 333 and squeeze the inner wall of the rectangular sliding groove 333, so that the movable frame 5033 slides along the rectangular sliding groove 333 and compresses the U-shaped elastic piece 5034 until under the rebounding force of the U-shaped elastic piece 5034, the groove wall of the rectangular sliding groove 333 will abut against the shaft one 313 to maintain the rotation posture of the L-shaped rotary connection plate 5031. Since the first limit plate 5032 continuously flips towards the back side of the pulse oximeter main body 1, the first limit plate 5032 will press the coiled wire 2 to prevent the wire 2 from becoming scattered. Secondly, the movable frame 5033 drives the second limit plate 5035 to move, so that the second limit plate 5035 extends to the port of the placement groove 502, thereby realizing the limitation of the finger clamping mechanism 3.

[0045] Working principle: The user presses the lower clamping plate 302 and the upper clamping plate 301 towards each other with one hand, causing the lower clamping plate 302 and the upper clamping plate 301 to flip around the rotary joint shaft 3031. At the same time, the lower clamping plate 302 and the upper clamping plate 301 drive the corresponding connecting rods 306, and the connecting rods 306 push the movable plate 305 to slide along the inner cavity of the fixed sleeve 303, and further compress the first spring 304. As the lower clamping plate 302 and the upper clamping plate 301 flip, the detection cavity 309 will open. At this time, the user puts a finger into the detection cavity 309, releases the lower clamping plate 302 and the upper clamping plate 301. Under the action of the elastic force of the first spring 304, the upper clamping plate 301 and the lower clamping plate 302 return to the initial state and clamp the finger, enabling the light-emitting diode component 311 and the receiving transistor component 312 to closely adhere to the user's finger. The light-emitting diode component 311 irradiates light on the finger, and the receiving transistor component 312 receives the optical signal after the light is absorbed by the finger. The optical signal is transmitted into the pulse oximeter main body 1 through the wire 2. The pulse oximeter main body 1 obtains the pulse wave signal according to the intensity of the optical signal, and obtains the detection results of pulse rate, blood oxygen, and heart rate variability based on the pulse wave signal. Secondly, when the lower clamping plate 302 and the upper clamping plate 301 clamp the finger too tightly, rotate the screw 308. As the screw 308 rotates, the bearing plate 307 will slide towards the bottom of the fixed sleeve 303 and gradually relieve the compression of the first spring 304. Therefore, the elastic force of the first spring 304 compressed by the movable plate 305 will become smaller, so that the force of the lower clamping plate 302 and the upper clamping plate 301 clamping the finger becomes smaller. After the detection is completed, insert the plug 401 into the detection cavity 309. As the plug 401 moves along the detection cavity 309, the plug 401 drives two groups of dust-free cloths 404 to slide against the light-emitting diode component 311 and the receiving transistor component 312 through the driving mechanism 403, and wipes off the fingerprints on the light-emitting diode component 311 and the receiving transistor component 312 through the dust-free cloths 404 until the L-shaped pin 402 is inserted into the limit slot 3091. Continue to press the button 4031, and the button 4031 together with the two groups of rectangular plates 4032 moves along the inner cavity of the plug 401. At the same time, the rectangular plates 4032 slide along the guide groove, and the rectangular plates 4032 drive the pin shaft 321 to slide along the inclined chute 332. Due to the spring force of the second spring 4034 blocking the bearing plate 4033, a part of the extrusion force of the pin shaft 321 pressing against the inner wall of the chute 332 causes the bearing plate 4033 to move towards the diode component 311 or the receiving transistor component 312. At the same time, another part of the extrusion force of the pin shaft 321 pressing against the inner wall of the chute 332 drives the bearing plate 4033 together with the dust-free cloth 404 to move axially, so that the dust-free cloth 404 completely wipes off the fingerprints on the diode component 311 and the receiving transistor component 312. When organizing the wire 2 and the finger clamping mechanism 3, directly wind the wire 2 around the winding sleeve 501. When the wire 2 is wound close to the end, insert the entire finger clamping mechanism 3 into the placement groove 502, and at the same time push the two groups of first limiting plates 5032,The first limiting plate 5032 drives the L-shaped rotary connection plate 5031 to rotate, and the first limiting plate 5032 flips towards the dorsal side of the pulse oximeter main body 1. At the same time, the first shaft 313 at the other end of the L-shaped rotary connection plate 5031 will slide along the rectangular sliding groove 333 and press against the inner wall of the rectangular sliding groove 333, causing the movable frame 5033 to slide along the rectangular sliding groove 333 and compress the U-shaped elastic piece 5034 until, under the rebounding force of the U-shaped elastic piece 5034, the groove wall of the rectangular sliding groove 333 abuts against the first shaft 313 to maintain the rotational posture of the L-shaped rotary connection plate 5031. Since the first limiting plate 5032 continuously flips towards the dorsal side of the pulse oximeter main body 1, the first limiting plate 5032 will press on the coiled wire 2. Secondly, the movable frame 5033 drives the second limiting plate 5035 to move, causing the second limiting plate 5035 to extend to the port of the placement groove 502.,

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification merely illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all such changes and improvements fall within the scope of the present invention as claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A handheld pulse oximeter, comprising a pulse oximeter main body (1) and a connecting wire (2) of the pulse oximeter main body (1), characterized in that: One end of the wire (2) is provided with a finger clamping mechanism (3). The finger clamping mechanism (3) includes: a lower clamping plate (302), and the lower clamping plate (302) is fixedly connected to the wire (2). An upper clamping plate (301) arranged above the lower clamping plate (302); a fixing sleeve (303) arranged between the upper clamping plate (301) and the lower clamping plate (302); a first spring (304) arranged inside the fixing sleeve (303). A movable plate (305) movably installed at one end of the first spring (304), and the movable plate (305) is slidably connected to the inner cavity of the fixing sleeve (303). Two groups of connecting rods (306) symmetrically hinged on the movable plate (305), one end of one group of connecting rods (306) is hinged to the lower clamping plate (302), and one end of the other group of connecting rods (306) is hinged to the upper clamping plate (301). A bearing plate (307) movably installed at the other end of the first spring (304), the bearing plate (307) is slidably connected to the inner cavity of the fixing sleeve (303); a screw rod (308) screwed to the bearing plate (307), and the end of the screw rod (308) is screwed to the fixing sleeve (303). A detection cavity (309) is formed between the upper clamping plate (301) and the lower clamping plate (302). Two groups of mounting grooves (310) are opened on the upper and lower sides in the detection cavity (309). A light-emitting diode assembly (311) is arranged in one group of mounting grooves (310), and a receiving transistor assembly (312) is arranged in the other group of mounting grooves (310). Two groups of rotating shafts (3031) are symmetrically arranged on both sides of the fixing sleeve (303), and both the upper clamping plate (301) and the lower clamping plate (302) are rotatably connected to the rotating shaft (3031). A plugging device (4) is movably inserted into the detection cavity (309), and the plugging device (4) is used for plugging and cleaning the detection cavity (309); the plugging device (4) includes a plug (401), and the plug (401) is movably inserted into the detection cavity (309); two groups of L-shaped pins (402) symmetrically arranged on the plug (401). A driving mechanism (403) arranged inside the plug (401); two groups of dust-free cloths (404) symmetrically arranged on the driving mechanism (403), and the driving mechanism (403) is used to drive the dust-free cloth (404). Two groups of limit slots (3091) are symmetrically opened at the port of the detection cavity (309), and the L-shaped pins (402) are inserted into the limit slots (3091); the driving mechanism (403) includes a button (4031), and the button (4031) is movably installed in the inner cavity of the plug (401); two groups of rectangular plates (4032) symmetrically arranged on the button (4031). A receiving plate (4033) slidably connected to the rectangular plate (4032), the dust-free cloth (404) is adhered to the receiving plate (4033); a second spring (4034) sleeved on the button (4031).

2. A hand-held pulse oximeter according to claim 1, characterized in that: A guiding groove is arranged on the receiving plate (4033), the rectangular plate (4032) is slidably connected to the guiding groove (331), four groups of oblique sliding grooves (332) are symmetrically arranged on both sides in the guiding groove (331), four groups of pin shafts (321) are symmetrically arranged on both sides of the rectangular plate (4032), and the pin shafts (321) are slidably connected to the oblique sliding grooves (332).

3. A hand-held pulse oximeter according to claim 2, characterized in that: A wire winding mechanism (5) is provided on the dorsal side of the pulse oximeter main body (1), and the wire winding mechanism (5) is used to organize the wire (2) and the finger clamping mechanism (3). The wire winding mechanism (5) includes: A winding sleeve (501), which is fixedly installed on the dorsal side of the pulse oximeter main body (1); A placement groove (502) provided on the winding sleeve (501).

4. A hand-held pulse oximeter according to claim 3, characterized in that: The winding sleeve (501) is used to wind the wire (2), and the placement groove (502) is used to place the finger clamping mechanism (3).

5. A hand-held pulse oximeter according to claim 4, characterized in that: The wire winding mechanism (5) further includes: a limit plate assembly (503), and the limit plate assembly (503) is used to limit the wire (2) and the finger clamping mechanism (3); The limit plate assembly (503) includes: An L-shaped rotary connection plate (5031), two groups of rotary connection grooves (5011) are symmetrically arranged on the winding sleeve (501), and the L-shaped rotary connection plate (5031) is rotatably connected in the rotary connection groove (5011); A first limit plate (5032) fixedly connected to one end of the L-shaped rotary connection plate (5031); A movable frame (5033) provided at the other end of the L-shaped rotary connection plate (5031); A U-shaped elastic piece (5034) provided on one side of the movable frame (5033); And, A second limit plate (5035) fixedly connected to the movable frame (5033).

6. A hand-held pulse oximeter according to claim 5, characterized in that: Both the U-shaped elastic piece (5034) and the movable frame (5033) are located in the rotary connection groove (5011), and the movable frame (5033) is slidably connected to the rotary connection groove (5011).

7. A handheld pulse oximeter according to claim 6, characterized in that: Rectangular sliding grooves (333) are symmetrically opened on both sides of the movable frame (5033), and two groups of shafts I (313) are symmetrically arranged on both sides of the other end of the L-shaped rotary connection plate (5031), and the shafts I (313) are slidably connected to the rectangular sliding grooves (333).

Images