CN118216908A - Painless needle assisting device - Google Patents

Abstract

The invention discloses a painless needle aid, which comprises a shell, a spiral spring, a rotary table, a button, an unlocking push rod, a sliding guide rail and a transmitter fixing shell, wherein the shell is formed by a shell A and a shell B in a hollow cavity structure with an opening at the lower end; the inner wall surface of the shell A is provided with a spring installation round groove, a guide rail chute and a push rod chute; the outer wall surface of the shell A is provided with a button mounting groove, and one side wall of the shell A is provided with a push rod sliding hole; the scroll spring is arranged in the spring installation circular groove; the turntable is rotatably sleeved on the fixed shaft; the front end of the unlocking push rod is inserted into the push rod chute and slides along the push rod chute; the two sides of the sliding guide rail are inserted into the two vertical guide rail sliding grooves in a one-to-one correspondence manner and slide along the corresponding vertical guide rail sliding grooves. The painless needle assisting device realizes needle assisting through one spiral spring, the whole needle assisting process is quicker, pain is reduced to the greatest extent, and painless needle assisting is realized.

Description

Painless needle assisting device

Technical Field

The invention relates to a painless needle assisting device.

Background

Monitoring of blood glucose is important to diabetics and blood glucose levels are useful in assessing conditions of glucose metabolism disorders in diabetics. Currently, blood glucose detection can be divided into in vitro detection after blood sampling and real-time detection by an implantable blood glucose sensor. When blood glucose is controlled by the method of in vitro detection after blood sampling, blood sampling must be performed several times a day, and a heavy burden is imposed on the spirit and flesh of a patient, so that a method of real-time detection by an implantable blood glucose sensor is becoming popular.

At present, the miniature sensor which is only implanted in subcutaneous tissue and can be used for clinical continuous blood sugar monitoring products is technically verified to a certain extent, and for this purpose, the field needs to implant a small and soft flexible detection part of a biological sensor into the skin, a puncture tube penetrates into the skin at a very fast speed, pain is reduced to a very low level, a sensor electrode part is left under the skin, continuous monitoring is realized, and the upper part of the sensor skin needs to be fixed with the skin.

Blood glucose continuous monitoring products generally include needle aids, sensors and transmitters which are sold as a kit, and are disposable and relatively costly. The needle aid is used for implanting a flexible detection part of a sensor into the skin, the part structure of the needle aid in the prior art is complex, two springs are generally needed to realize the whole needle aid process, the pre-compression potential energy of one spring is used for delivering a needle, and the pre-compression potential energy of the other spring is used for withdrawing the needle; or the steel needle and the soft needle are fed into the body by manpower, and then the steel needle is withdrawn by the needle withdrawing mechanism; the needle feeding and the needle withdrawing are completed through two mechanisms, the steel needle body retention time in the needle assisting process is about 40-50 milliseconds, the steel needle body retention time is long, and the pain is caused when the steel needle is injected. And in the use process, if a user touches the start button of the needle aid device by mistake, the needle aid device can be directly started to work, so that the whole set of blood sugar continuous monitoring products are invalid.

The applicant discloses a needle aid in the chinese patent with the application number CN 202220834228.0, the part structure is simple, the needle aid process can be realized through the cooperation of a clockwork spring and a rotary table, and the needle aid has a toggle switch to avoid the user to touch the button by mistake to open. However, in the process of assisting the needle, the rotating disc is connected with the tray through the connecting rod, when the clockwork spring rotates, the tray is pushed to move downwards/upwards through the connecting rod, the connecting rod is connected with the rotating disc and the connecting rod is connected with the tray through the pin shaft, the contact points are concentrated, and if the pin shaft is disconnected in the use process, the whole needle assisting device is easy to lose efficacy.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a painless needle assisting device, wherein a sliding guide rail is adopted to replace a connecting rod to connect a rotary table with a transmitter fixing shell, so that the whole needle assisting process is more stable and reliable; the unlocking push rod is used for avoiding the user from touching the button by mistake, so that the unlocking push rod is safer and more practical; the needle is assisted by one spiral spring, the whole needle assisting process is quicker, pain is reduced to the greatest extent, and painless needle assisting is realized.

The technical scheme for achieving the purpose is as follows: a painless needle aid comprising a housing, a spiral spring, a rotary disc, a button, an unlocking push rod, a sliding guide rail and an emitter fixing shell, wherein:

the shell is formed by combining a shell A and a shell B into a hollow cavity structure with an opening at the lower end;

The inner wall surface of the shell A is provided with a spring installation round groove, a guide rail sliding groove and a push rod sliding groove, the axial direction of the spring installation round groove is mutually perpendicular to the axial direction of the shell A, and a fixed shaft is coaxially arranged in the spring installation round groove; the guide rail sliding groove consists of two vertical guide rail sliding grooves which are respectively arranged at the two radial sides of the spring installation circular groove; the push rod sliding grooves are vertically arranged, and the push rod sliding grooves are positioned between the spring installation round groove and one of the vertical guide rail sliding grooves;

the outer wall surface of the A shell is provided with a button mounting groove, and one side wall of the A shell is provided with a push rod sliding hole;

the scroll spring is arranged in the spring installation circular groove and sleeved on the fixed shaft; the rotary disc is rotatably sleeved on the fixed shaft, and the annular peripheral wall of the rotary disc is positioned between the scroll spring and the groove wall of the spring mounting circular groove; the inner end of the scroll spring is connected with the fixed shaft; the outer end of the scroll spring is connected with the annular peripheral wall of the turntable;

A turntable boss is arranged on the outer wall surface of the annular peripheral wall of the turntable, and a turntable limiting table is arranged at the bottom of the turntable;

the button is movably arranged in the button mounting groove of the A shell, and the rear end of the button penetrates through the groove bottom of the button mounting groove and extends into the A shell; a button boss is arranged on the inner side wall of the rear end of the button, and in an initial state, the turntable boss is abutted against the button boss;

The front end of the unlocking push rod is inserted into the push rod chute and slides along the push rod chute; one side of the unlocking push rod is inserted into the push rod sliding hole and slides along the push rod sliding hole, and in an initial state, the rear end of the button is abutted against the other side of the unlocking push rod;

the front side of the upper part of the sliding guide rail is provided with a rotary table limiting groove which is transversely arranged, two sides of the sliding guide rail are correspondingly inserted into the two vertical guide rail sliding grooves one by one and slide along the corresponding vertical guide rail sliding grooves, and the rotary table limiting table is inserted into the rotary table limiting groove;

the transmitter fixing shell is coaxially arranged in the shell;

The top end of the emitter fixing shell is connected with the bottom end of the sliding guide rail.

The painless needle assisting device is characterized in that a hard needle mounting hole is formed in the bottom end of the sliding guide rail, and a hard needle inserting hole which penetrates up and down is formed in the top end of the emitter fixing shell.

The painless needle aid comprises a cylindrical fixing shaft, wherein a spring inner end bayonet is formed in the wall surface of the fixing shaft along the axial direction of the fixing shaft, and a spring outer end bayonet is formed in the annular peripheral wall of the rotary disc along the axial direction of the annular peripheral wall of the rotary disc; the inner end of the scroll spring is clamped in the bayonet at the inner end of the spring; the outer end of the scroll spring is clamped in the bayonet at the outer end of the spring.

The painless needle assisting device comprises a rotating disc, wherein the disc bottom of the rotating disc is provided with a shaft hole and two rotating holes, the two rotating holes are positioned on two radial sides of the shaft hole, and the shaft hole of the disc bottom of the rotating disc is sleeved on the fixed shaft.

The painless needle assisting device is characterized in that the button mounting groove is positioned at the front side of the spring mounting round groove, and two button perforations are formed in the bottom of the button mounting groove; the button comprises a button body, a button short inserting column and a button long inserting column, wherein the button short inserting column and the button long inserting column are respectively arranged at the rear end of the button body; the button short inserting posts and the button long inserting posts penetrate through the two button perforation holes in a one-to-one correspondence manner, and the button short inserting posts penetrate through the corresponding button perforation holes and are positioned in the fixed shaft;

the button boss is positioned on the inner side wall of the rear end of the button long inserting column;

the bottom of the button mounting groove is provided with a button elastic piece protruding forwards, and the button body is contacted with the button elastic piece.

The painless needle assisting device comprises a push rod body, a push rod front inserting piece arranged at the front end of the push rod body, a push rod side inserting piece arranged at the lower part of one side of the push rod body and a button abutting table arranged at the upper part of the other side of the push rod body;

the push rod front inserting piece is inserted into the push rod sliding groove and slides along the push rod sliding groove; the push rod side inserting piece is inserted into the push rod sliding hole and slides along the push rod sliding hole, and in an initial state, the rear end of the button long inserting column is abutted to the front side of the button abutting table.

The painless needle assisting device is characterized in that the front inserting piece of the push rod is provided with the elastic piece, and the groove wall of the push rod chute is provided with the corrugated strip matched with the elastic piece.

The painless needle aid comprises a guide rail back plate, a guide rail bottom plate and two guide bars, wherein the guide rail back plate and the guide rail bottom plate are connected to be L-shaped, and the two guide bars are connected to two sides of the guide rail back plate in a one-to-one correspondence manner;

The turntable limiting groove is transversely formed in the upper part of the front side surface of the guide rail rear plate;

the two guide bars of the sliding guide rail are inserted into the two vertical guide rail sliding grooves in a one-to-one correspondence manner and slide along the corresponding vertical guide rail sliding grooves.

The painless needle assisting device is characterized in that the guide rail bottom plate is provided with the emitter fixing shell slot, the top end of the emitter fixing shell is provided with the emitter fixing shell inserting table, and the emitter fixing shell inserting table is inserted into the emitter fixing shell slot.

The painless needle assisting device is characterized in that the rotary disc limiting groove is in a strip shape or an upward protruding arc shape.

According to the painless needle assisting device, the sliding guide rail is adopted to replace a connecting rod to connect the turntable and the emitter fixing shell, so that the whole needle assisting process is more stable and reliable; the unlocking push rod is used for avoiding the user from touching the button by mistake, so that the unlocking push rod is safer and more practical; the needle is assisted by one spiral spring, the whole needle assisting process is quicker, pain is reduced to the greatest extent, and painless needle assisting is realized.

Drawings

FIG. 1 is a front view of the painless needle assist apparatus of the present invention;

FIG. 2 is an exploded view of the painless needle aid of the present invention

FIG. 3 is an internal structural view of the painless needle booster of the present invention;

FIG. 4 is a cross-sectional view of the painless needle assist apparatus of the present invention;

FIG. 5 is a schematic view of the installation of the spiral spring of the painless needle assist apparatus of the present invention;

FIG. 6 is a schematic view of the installation of the turntable of the painless needle assist apparatus of the present invention;

FIG. 7 is a schematic view of the installation of an unlocking push rod of the painless needle assist apparatus of the present invention;

FIG. 8 is a schematic illustration of the unlocking push rod and button limiting;

FIG. 9 is a schematic view showing the installation of the sliding guide rail of the painless needle assist apparatus of the present invention;

FIG. 10 is a schematic illustration of the attachment process of the sliding guide rail and the transmitter housing;

FIG. 11 is a schematic diagram of the operation of the painless needle assist apparatus of the present invention;

FIG. 12 is a comparison of the operation of the turntable stop table of the turntable in the elongated turntable stop slot and the arcuate turntable stop slot (the rotation angle of the turntable is the same);

FIG. 13 is a comparison of the operation of the turntable stop table of the turntable in the elongated turntable stop slot and the arcuate turntable stop slot (with the same slide rail travel);

fig. 14 is a schematic diagram of hard needle retention time detection.

Detailed Description

In order to enable those skilled in the art to better understand the technical scheme of the present invention, the following detailed description is provided with reference to the accompanying drawings:

Referring to fig. 1 to 11, a painless needle booster according to a preferred embodiment of the present invention includes a housing 1, a spiral spring 2, a rotary disc 3, a button 4, an unlocking push rod 5, a sliding guide 6, and a transmitter fixing case 7.

The shell 1 is formed by combining an A shell 11 and a B shell 12 into a hollow cavity structure with an opening at the lower end; the inner wall surface of the shell A11 is provided with a spring installation round groove 13, a guide rail chute and a push rod chute 15, the axial direction of the spring installation round groove 13 is mutually perpendicular to the axial direction of the shell 1, and a fixed shaft 16 is coaxially arranged in the spring installation round groove 13; the guide rail sliding groove consists of two vertical guide rail sliding grooves 14, and the two vertical guide rail sliding grooves 14 are respectively arranged at the two radial sides of the spring installation circular groove 13; the push rod runner 15 is vertically arranged, and the push rod runner 15 is located between the spring mounting circular groove 13 and one of the vertical guide rail runners 14.

The outer wall surface of the A shell 11 is provided with a button mounting groove, and one side wall of the A shell 11 is provided with a push rod sliding hole 17.

The scroll spring 2 is arranged in the spring installation circular groove 13 and sleeved on the fixed shaft 16; the rotary disk 3 is rotatably sleeved on the fixed shaft 16, and the annular peripheral wall of the rotary disk 3 is positioned between the scroll spring 2 and the groove wall of the spring mounting circular groove 13; the inner end of the scroll spring 2 is connected with a fixed shaft 16; the outer end of the scroll spring 2 is connected with the annular peripheral wall of the turntable 3; specifically, the fixed shaft 16 is cylindrical, a spring inner end bayonet 161 is formed on the wall surface of the fixed shaft 16 along the axial direction thereof, and a spring outer end bayonet 31 is formed on the annular peripheral wall of the turntable 3 along the axial direction thereof; the inner end of the scroll spring 2 is clamped in a spring inner end bayonet 161; the outer end of the spiral spring 2 is clamped in the outer end clamping opening 31 of the spring. The pre-pressing potential energy of the scroll spring 2 pushes the turntable 3 to rotate.

The disk bottom of the rotary disk 3 is provided with a shaft hole 32 and two rotating holes 33, the two rotating holes 33 are positioned on two radial sides of the shaft hole 32, and the shaft hole 32 of the disk bottom of the rotary disk is sleeved on the fixed shaft 16. During installation, two bosses of the rotary table rotary tool are clamped in the two rotary holes 33, so that the rotary table 3 can be rotated, and the spiral spring 2 can be rotated, so that the pre-pressing potential energy of the spiral spring 2 reaches proper strength, and needle feeding and needle withdrawing can be realized.

The outer wall surface of the annular peripheral wall of the turntable 3 is provided with a turntable boss, and the bottom of the turntable 3 is provided with a turntable limiting table 34.

The button 4 is movably arranged in a button mounting groove of the A shell 11, and the rear end of the button 4 penetrates through the groove bottom of the button mounting groove and extends into the A shell 11; the button boss 41 is provided on the inner side wall of the rear end of the button 4, and in the initial state, the turntable boss is abutted against the button boss 41.

Specifically, the button mounting groove is located on the front side of the spring mounting circular groove 13, and the groove bottom of the button mounting groove coincides with the groove bottom portion of the spring mounting circular groove 13. Two button perforations are formed in the bottom of the button mounting groove; the button 4 comprises a button body 43, a button short plug 44 and a button long plug 42, wherein the button short plug and the button long plug are respectively arranged at the rear end of the button body 43; the button short inserting posts 44 and the button long inserting posts 42 penetrate through the two button perforation holes in a one-to-one correspondence manner, and the button short inserting posts 43 penetrate through the corresponding button perforation holes and then are positioned in the fixed shaft 16; the button boss 41 is positioned on the inner side wall of the rear end of the button long plug 42; the tank bottom of the button mounting groove is provided with a button shrapnel 19 protruding forwards, the button body 43 is contacted with the button shrapnel 19, when the button 4 is pressed, the button long inserting column 42 drives the button boss 41 to move backwards, the turntable boss is separated from the button boss 41, and the turntable 3 can rotate under the action of the scroll spring 2.

The front end of the unlocking push rod 5 is inserted into the push rod chute 15 and slides along the push rod chute 15; one side of the unlocking push rod 5 is inserted into the push rod sliding hole 17 and slides along the push rod sliding hole 17, and in the initial state, the rear end of the push button 4 abuts against the other side of the unlocking push rod 5.

Specifically, the unlocking push rod 5 includes a push rod body 51, a push rod front insertion piece 52 provided at the front end of the push rod body 51, a push rod side insertion piece 53 provided at the lower portion of one side of the push rod body, and a button abutting table 54 provided at the upper portion of the other side of the push rod body; the push rod front insert 52 is inserted into the push rod chute 15 and slides along the push rod chute 15; the push rod side insert piece 53 is inserted into the push rod sliding hole 17 and slides along the push rod sliding hole 17, and in the initial state, the rear end of the long button insert post 42 of the button 4 is abutted against the front side of the button abutting table 54, and even if the user erroneously touches the button 4, the button cannot be pushed to move backward due to the abutting action of the button abutting table 54 for unlocking the push rod 5. When the needle box is used, the needle box bottom shell provided with the sensor is provided with the push piece, when the painless needle aid is in butt joint with the sensor in the needle box bottom shell, the push piece pushes the push rod side inserting piece 53 to slide upwards along the push rod sliding hole 17, meanwhile, the push rod front inserting piece 52 moves upwards along the push rod sliding groove 15 to play a guiding role, the whole unlocking push rod 5 moves upwards, the rear end of the long button inserting post 42 of the button 4 is separated from the button abutting table 54, the button 4 is unlocked, and the button 4 can be pressed backwards.

The front inserting piece 52 of the push rod is provided with an elastic piece 55, and the groove wall of the push rod chute 15 is provided with a corrugated strip 151 matched with the elastic piece 55.

The front side of the upper part of the sliding guide rail 6 is provided with a rotary table limiting groove 60 which is transversely arranged, two sides of the sliding guide rail are correspondingly inserted into the two vertical guide rail sliding grooves 14 one by one and slide along the corresponding vertical guide rail sliding grooves, and the rotary table limiting table 34 is inserted into the rotary table limiting groove 60; when the turntable 3 rotates, the turntable limiting table 34 in the turntable limiting groove 60 pushes the sliding guide rail 6 to move downwards and then upwards.

The transmitter fixing shell 7 is coaxially arranged in the shell 1; the top end of the transmitter fixing case 7 is connected to the bottom end of the slide rail 6.

Specifically, the sliding guide rail 6 includes a guide rail back plate 61, a guide rail bottom plate 62 and two guide bars 63, the guide rail back plate 61 and the guide rail bottom plate 62 are connected in an L shape, and the two guide bars 63 are connected to two sides of the guide rail back plate 61 in a one-to-one correspondence manner; the turntable limiting groove 60 is transversely formed in the upper part of the front side surface of the guide rail rear plate 61; the two guide bars 63 of the slide rail 6 are inserted in the two vertical rail grooves 14 in a one-to-one correspondence and slide along the corresponding vertical rail grooves.

The guide rail base plate 62 is provided with an emitter fixing shell slot 621, the top end of the emitter fixing shell 7 is provided with an emitter fixing shell inserting table 71, and the emitter fixing shell inserting table 71 is inserted into the emitter fixing shell slot 621.

The bottom end of the sliding guide rail 6, namely the guide rail bottom plate 62 is provided with a hard needle mounting hole 64, and the top end of the emitter fixing shell 7 is provided with a hard needle jack 72 which penetrates up and down; when the painless needle aid is in butt joint with the sensor assembly in the needle box bottom shell, the top end of the hard needle 8 on the sensor assembly passes through the hard needle insertion hole 72 and then is clamped in the hard needle mounting hole 64, and the sliding guide rail 6 drives the hard needle 8 to move up and down when moving up and down.

The emitter fixing shell 7 is of a groove-shaped structure with an opening at the lower end; a transmitter assembly 9 is disposed within the transmitter housing 7. The lower part of the housing 1 is covered with a bottom cover 10. The bottom of the inner wall surface of the outer shell 1 is provided with a transmitter fixing shell limiting table 18, and when the needle aid is used and pulled out, the transmitter fixing shell 7 is clamped by the transmitter fixing shell limiting table 18, left in the outer shell 1 and taken down together.

Referring to fig. 11, in the painless-needle booster of the present invention, in use, the bottom cover 10 is removed, the needle case bottom case containing the sensor assembly is mounted at the lower portion of the housing 1, when the painless-needle booster is docked with the sensor assembly in the needle case bottom case, the tip of the hard needle 8 on the sensor assembly is caught in the hard needle mounting hole 64 after passing through the hard needle insertion hole 72, simultaneously the push piece on the needle case bottom case pushes the push rod side insert 53 to slide upward along the push rod sliding hole 17, the entire unlocking push rod 5 moves upward, the rear end of the long button insert 42 of the push button 4 is disengaged from the button abutting table 54, the push button 4 is unlocked, then the painless-needle booster docked with the sensor is pressed to a proper position of human skin, then the push button 4 is pressed inward, the dial boss on the annular peripheral wall of the dial 3 is disengaged from the button boss 41 at the rear end of the long button insert 42, the button 4 releases the limit on the rotary table 3, the rotary table 3 rotates under the drive of the pre-pressing potential energy of the spiral spring 2, the rotary table limiting table 34 moves downwards along with the rotation of the rotary table 4, the rotary table limiting table 34 in the rotary table limiting groove 60 pushes the sliding guide rail 6 to move downwards when moving downwards, the emitter fixing shell 7 and the hard needle 8 are driven to move downwards, the emitter component is driven to move downwards, the hard needle 8 drives the sensor component to be pricked into skin together, when the spiral spring 2 drives the rotary table 3 to push the sliding guide rail 6 to the bottommost end, at the moment, the hard needle 8 is pricked into muscle completely, the needle pricking process is completed, the sensor is implanted into the skin, the rotary table 3 continues to rotate, the rotary table limiting table 34 drives the sliding guide rail 6 to move upwards, and the sliding guide rail 6 drives the hard needle 8 to pull upwards, so that the hard needle 8 is recovered; the painless needle aid is then removed and the emitter and sensor are adhered to the skin by means of a medical adhesive backing at the bottom end of the emitter assembly.

The painless needle assisting device has simpler structure, adopts the sliding guide rail to replace a connecting rod to connect the rotary table and the emitter fixing shell, and the rotary table limiting table 34 on the rotary table is inserted into the long rotary table limiting groove 60 on the sliding guide rail, and the rotary table limiting table 34 is always positioned in the rotary table limiting groove 60 in the rotary table rotating process, so that the whole needle assisting process is more stable and reliable.

Referring to fig. 12, the turntable limiting groove 60 may be elongated or may be configured to have an upwardly protruding arc shape. Fig. 12a shows the movement trace of the turntable limiting table 34 on the turntable in the long turntable limiting groove 60 during the downward movement of the sliding guide rail 6, and B shows the movement trace of the turntable limiting table 34 on the turntable in the arc-shaped turntable limiting groove 60 during the downward movement of the sliding guide rail 6, and the arc-shaped turntable limiting groove 60 can realize a longer pushing stroke h2> h1 of the sliding guide rail under the condition that the rotation angles of the turntable are the same =.1 =.2.

Referring to fig. 13, a diagram shows a movement track of the turntable limiting table 34 on the turntable in the long turntable limiting groove 60 during the downward movement of the sliding guide rail 6, and B diagram shows a movement track of the turntable limiting table 34 on the turntable in the arc-shaped turntable limiting groove 60 during the downward movement of the sliding guide rail 6, when the sliding guide rail travel is the same h1=h3, the arc-shaped turntable limiting groove 60 can make the rotation angle of the turntable smaller, i.e. angle 3< <1, i.e. can complete the needle assisting process in a shorter time.

Referring to fig. 14, hard needle retention time test: the hard needle retention time of a commercial product and the painless needle aid of the invention is detected by an industrial high-speed camera with the product model OSG030-790UMTZ, and the specific experimental method comprises the following steps: the needle aid 100 is in butt joint with a needle box, a sensor and a hard needle are arranged, the needle aid is arranged at the front end of an industrial high-speed camera 501, a camera of the industrial high-speed camera 501 and a movement area of the hard needle are in the same direction, so that the industrial high-speed camera 501 can shoot a movement process of the hard needle, and a light supplementing lamp 502 is arranged to irradiate the needle aid so as to provide sufficient illumination; in the shooting process, buttons of a commercial product and the painless needle aid device are respectively pressed, and an industrial high-speed camera records the movement process of the commercial product and the painless needle aid device. After shooting, analyzing the video image by software, starting from the outward movement of the needle point of the hard needle to the outlet of the needle aid, and then returning the needle point of the hard needle to the outlet of the needle aid, calculating the video image frame number between the two to obtain the video image frame number of the hard needle moving outside the needle aid, and obtaining the moving time of the hard needle outside the needle aid by using the average frame rate of the high-speed camera when the video image frame number of the hard needle moving outside the needle aid is/is tested, namely the stay time of the hard needle, for example: when commercial products are tested, the average frame rate of a high-speed camera is 2277fps (2277 frames per second), the average movement of the hard needle outside the needle aid is 110 frames, 110 frames/2277 fps=48.3 ms, and the average movement of the hard needle outside the needle aid is 48.3ms; when the painless needle aid of the invention is tested, the average frame rate of the high-speed camera is 2696fps (2696 frames per second), the average moving speed of the steel needle outside the needle aid is 12 frames, 12 frames/2696 fps=4.45 ms, and the average moving speed of the steel needle outside the needle aid is calculated to be 4.45ms. Through multiple tests, the average value of the hard needle retention time of the painless needle aid is 4.45 milliseconds, and the hard needle retention time of the commercially available needle aid is 48.3 milliseconds.

In summary, the painless needle assisting device adopts the sliding guide rail to replace the connecting rod to connect the turntable and the emitter fixing shell, so that the whole needle assisting process is more stable and reliable; the unlocking push rod is used for avoiding the user from touching the button by mistake, so that the unlocking push rod is safer and more practical; the needle is assisted by one spiral spring, the whole needle assisting process is quicker, pain is reduced to the greatest extent, and painless needle assisting is realized.

It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the invention, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the invention as long as they fall within the true spirit of the invention.

Claims (10)

1. The painless needle assisting device is characterized by comprising a shell, a spiral spring, a rotary disc, a button, an unlocking push rod, a sliding guide rail and a transmitter fixing shell, wherein:

the shell is formed by combining a shell A and a shell B into a hollow cavity structure with an opening at the lower end;

The inner wall surface of the shell A is provided with a spring installation round groove, a guide rail sliding groove and a push rod sliding groove, the axial direction of the spring installation round groove is mutually perpendicular to the axial direction of the shell A, and a fixed shaft is coaxially arranged in the spring installation round groove; the guide rail sliding groove consists of two vertical guide rail sliding grooves which are respectively arranged at the two radial sides of the spring installation circular groove; the push rod sliding grooves are vertically arranged, and the push rod sliding grooves are positioned between the spring installation round groove and one of the vertical guide rail sliding grooves;

the outer wall surface of the A shell is provided with a button mounting groove, and one side wall of the A shell is provided with a push rod sliding hole;

the scroll spring is arranged in the spring installation circular groove and sleeved on the fixed shaft; the rotary disc is rotatably sleeved on the fixed shaft, and the annular peripheral wall of the rotary disc is positioned between the scroll spring and the groove wall of the spring mounting circular groove; the inner end of the scroll spring is connected with the fixed shaft; the outer end of the scroll spring is connected with the annular peripheral wall of the turntable;

A turntable boss is arranged on the outer wall surface of the annular peripheral wall of the turntable, and a turntable limiting table is arranged at the bottom of the turntable;

the button is movably arranged in the button mounting groove of the A shell, and the rear end of the button penetrates through the groove bottom of the button mounting groove and extends into the A shell; a button boss is arranged on the inner side wall of the rear end of the button, and in an initial state, the turntable boss is abutted against the button boss;

The front end of the unlocking push rod is inserted into the push rod chute and slides along the push rod chute; one side of the unlocking push rod is inserted into the push rod sliding hole and slides along the push rod sliding hole, and in an initial state, the rear end of the button is abutted against the other side of the unlocking push rod;

the front side of the upper part of the sliding guide rail is provided with a rotary table limiting groove which is transversely arranged, two sides of the sliding guide rail are correspondingly inserted into the two vertical guide rail sliding grooves one by one and slide along the corresponding vertical guide rail sliding grooves, and the rotary table limiting table is inserted into the rotary table limiting groove;

the transmitter fixing shell is coaxially arranged in the shell;

The top end of the emitter fixing shell is connected with the bottom end of the sliding guide rail.

2. The painless needle booster according to claim 1, wherein the bottom end of the sliding guide rail is provided with a hard needle mounting hole, and the top end of the transmitter fixing case is provided with a hard needle insertion hole penetrating up and down.

3. The painless needle aid according to claim 1, wherein the fixed shaft is cylindrical, a spring inner end bayonet is formed on a wall surface of the fixed shaft along an axial direction of the fixed shaft, and a spring outer end bayonet is formed on an annular peripheral wall of the turntable along the axial direction of the annular peripheral wall; the inner end of the scroll spring is clamped in the bayonet at the inner end of the spring; the outer end of the scroll spring is clamped in the bayonet at the outer end of the spring.

4. The painless needle booster according to claim 1, wherein the disc bottom of the rotary disc is provided with a shaft hole and two rotating holes, the two rotating holes are positioned at two radial sides of the shaft hole, and the shaft hole of the disc bottom of the rotary disc is sleeved on the fixed shaft.

5. The painless needle assistant of claim 1 wherein the button mounting groove is positioned at the front side of the spring mounting circular groove, and two button perforations are formed at the bottom of the button mounting groove; the button comprises a button body, a button short inserting column and a button long inserting column, wherein the button short inserting column and the button long inserting column are respectively arranged at the rear end of the button body; the button short inserting posts and the button long inserting posts penetrate through the two button perforation holes in a one-to-one correspondence manner, and the button short inserting posts penetrate through the corresponding button perforation holes and are positioned in the fixed shaft;

the button boss is positioned on the inner side wall of the rear end of the button long inserting column;

the bottom of the button mounting groove is provided with a button elastic piece protruding forwards, and the button body is contacted with the button elastic piece.

6. The painless needle booster according to claim 5, wherein the unlocking push rod comprises a push rod body, a push rod front insert piece provided at a front end of the push rod body, a push rod side insert piece provided at a lower portion of one side of the push rod body, and a button abutting table provided at an upper portion of the other side of the push rod body;

the push rod front inserting piece is inserted into the push rod sliding groove and slides along the push rod sliding groove; the push rod side inserting piece is inserted into the push rod sliding hole and slides along the push rod sliding hole, and in an initial state, the rear end of the button long inserting column is abutted to the front side of the button abutting table.

7. The painless needle booster according to claim 6, wherein the push rod front inserting piece is provided with an elastic piece, and the groove wall of the push rod chute is provided with a corrugated strip matched with the elastic piece.

8. The painless needle aid according to claim 1, wherein the sliding guide rail comprises a guide rail back plate, a guide rail bottom plate and two guide bars, wherein the guide rail back plate and the guide rail bottom plate are connected in an L shape, and the two guide bars are connected to two sides of the guide rail back plate in a one-to-one correspondence manner;

The turntable limiting groove is transversely formed in the upper part of the front side surface of the guide rail rear plate;

the two guide bars of the sliding guide rail are inserted into the two vertical guide rail sliding grooves in a one-to-one correspondence manner and slide along the corresponding vertical guide rail sliding grooves.

9. The painless acupuncture device according to claim 8, wherein an emitter fixing case slot is formed in the guide rail base plate, an emitter fixing case insertion table is arranged at the top end of the emitter fixing case, and the emitter fixing case insertion table is inserted into the emitter fixing case slot.

10. A painless needle assistant according to claim 1 or 8 and wherein the rotary disc limit groove has a long strip shape or an upwardly convex arc shape.