CN114984376B

CN114984376B - Water-light needle injection structure

Info

Publication number: CN114984376B
Application number: CN202210564040.3A
Authority: CN
Inventors: 董传贺; 李旺鑫; 贾睿昊; 赵欣
Original assignee: Jinan Guoke Medical Engineering Technology Development Co ltd
Current assignee: Jinan Guoke Medical Engineering Technology Development Co ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2023-11-07
Anticipated expiration: 2042-05-23
Also published as: CN114984376A

Abstract

The invention discloses a hydro-optical needle injection structure, which belongs to the field of medical equipment and comprises a negative pressure cavity, a needle head, an injector and a push rod, wherein the needle head is arranged in the negative pressure cavity, the injector is communicated with the needle head, the push rod is arranged on the injector, the hydro-optical needle injection structure further comprises a support, a driving assembly and a sliding block, the push rod is slidably arranged on the support, the support is fixedly connected with the sliding block, the driving assembly comprises a motor, a speed reducer and a screw rod, the motor is connected with the speed reducer, the screw rod is connected with the speed reducer, the sliding block is matched with the screw rod, the motor drives the screw rod to rotate through the speed reducer, the sliding block drives the push rod to move relative to the injector, and liquid in the injector is stably injected through the needle head.

Description

Water-light needle injection structure

Technical Field

The invention relates to a medical instrument, in particular to a water-light needle injection structure.

Background

The facial skin of an adult is easy to loose, wrinkle, large pores and the like, and the problems can be improved by injecting medicines into the dermis layer of the skin, so that the facial skin is moist and tender, the wrinkles are reduced and compact. The current mainstream water light needle is mainly combined with negative pressure technology, the skin is lifted by utilizing negative pressure before the water light needle enters the skin, and then the needle head accurately enters the dermis layer, so that the medicine is injected.

The existing water-light needle injection process has the problems of low injection precision, unstable injection process and the like.

Disclosure of Invention

In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a water optical needle injection structure with high injection precision and stable injection process.

One of the purposes of the invention is realized by adopting the following technical scheme:

the utility model provides a water light needle injection structure, includes negative pressure chamber, syringe needle, syringe and push rod, the syringe needle install in negative pressure intracavity, the syringe with the syringe needle intercommunication, the push rod install in the syringe, water light needle injection structure still includes support, drive assembly and slider, push rod slidable mounting in the support, the support with slider fixed connection, drive assembly includes motor, reduction gear and screw rod, the motor with the reduction gear is connected, the screw rod with the reduction gear is connected, the slider with the screw rod cooperation, the motor passes through the reduction gear speed reduction drives the screw rod rotates, makes the slider drives the push rod is relative the syringe removes, liquid in the syringe passes through the syringe needle steady injection.

Further, the screw is rotatably mounted on the support, and the speed reducer is fixedly mounted on the support.

Further, the support includes bottom plate, first curb plate, second curb plate and slide, first curb plate with the second curb plate is fixed in respectively the opposite ends of bottom plate, the slide be fixed in first curb plate with the second curb plate, the slide with the bottom plate is parallel, the screw rod rotate install in first curb plate and second curb plate, push rod slidable mounting in the slide.

Further, the water needle injection structure further comprises an encoder, and the encoder is mounted on the motor to monitor the moving distance of the push rod.

Further, the hydro-optical needle injection structure further comprises a clamping piece, wherein the clamping piece is installed on the bracket and clamps the syringe to enable the syringe to be positioned.

Further, the holder includes base and buckle portion, buckle portion follows the base extends and goes out, the support includes the installation department, the installation department is equipped with mounting hole and buckle groove, the shape of mounting hole with the shape of buckle portion corresponds, the buckle groove be circular and with the mounting hole intercommunication, buckle portion follows the mounting hole gets into the buckle groove and can rotate in the buckle groove, buckle portion with the inner wall conflict in buckle groove realizes the buckle.

Further, the mounting portion further comprises an abutting portion, the abutting portion is located in the buckling groove, and the abutting portion enables the buckling portion to be limited.

Further, the clamping piece further comprises a clamping portion, the clamping portion extends out of the base, the clamping portion is arc-shaped, and the injector is located in the clamping portion.

Further, the hydro-optical needle injection structure further comprises a knob, wherein the knob is fixed with the injector, the needle head is installed with the knob, and the knob adjusts the extending length of the needle head.

Further, the knob is in interference fit with the syringe.

Compared with the prior art, the water-light needle injection structure also comprises a bracket, a driving assembly and a sliding block, wherein the push rod is slidably arranged on the bracket, the bracket is fixedly connected with the sliding block, the driving assembly comprises a motor, a speed reducer and a screw rod, the motor is connected with the speed reducer, the screw rod is connected with the speed reducer, the sliding block is matched with the screw rod, the motor drives the screw rod to rotate through the speed reduction of the speed reducer, the sliding block drives the push rod to move relative to the injector, and liquid in the injector is stably injected through the needle head.

Drawings

FIG. 1 is a perspective view of a water needle injection structure of the present invention;

FIG. 2 is a perspective view of a holder of the hydro-optical needle injection structure of FIG. 1;

FIG. 3 is a partial structural perspective view of the bracket of FIG. 1;

FIG. 4 is a perspective view of a holder of the hydro-optical needle injection structure of FIG. 1;

FIG. 5 is a perspective cross-sectional view of the hydro-optical needle injection structure of FIG. 1;

fig. 6 is a perspective view of an internal structure of the hydro-optical needle injection structure of fig. 1.

In the figure: 10. a housing; 20. a drive assembly; 21. a motor; 22. a speed reducer; 23. a screw; 30. a bracket; 31. a bottom plate; 32. a first side plate; 33. a second side plate; 34. a slide plate; 35. a mounting part; 350. a mounting hole; 351. a buckle groove; 352. a collision part; 40. a slide block; 50. a push rod; 60. a syringe; 70. a clamping member; 71. a base; 72. a fastening part; 73. a clamping part; 80. a knob; 90. a negative pressure chamber; 100. a needle; 101. an encoder.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or be present as another intermediate element through which the element is fixed. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Fig. 1 to 6 are schematic views of a hydro-optical needle injection structure for injecting a medicine into skin to improve the problems of skin sagging, wrinkles, enlarged pores, etc. The hydro-optical needle injection structure comprises a housing 10, a drive assembly 20, a bracket 30, a slider 40, a push rod 50, a syringe 60, a clamp 70, a knob 80, a negative pressure cavity 90, a needle 100, and an encoder 101.

The housing 10 is made of plastic. The housing 10 is located at the outermost portion for protecting the driving assembly 20, the bracket 30, the slider 40, and the push rod 50.

The drive assembly 20 includes a motor 21, a decelerator 22, and a screw 23. The motor 21 is used to provide the power for injection. The speed reducer 22 is engaged with an output gear of the motor 21, and the speed reducer 22 is configured to reduce the rotational speed of the motor 21 and increase the torque. The speed reducer 22 is connected with the screw 23 through rivets, and the speed reducer 22 drives the screw 23 to rotate. The driving assembly 20 is stable and accurate in output power through the arrangement of the motor 21, the speed reducer 22 and the screw 23.

The bracket 30 includes a bottom plate 31, a first side plate 32, a second side plate 33, a slide plate 34, and a mounting portion 35. The first side plate 32 and the second side plate 33 are fixed to opposite ends of the bottom plate 31, and the first side plate 32 and the second side plate 33 are parallel to each other and perpendicular to the bottom plate 31. The slide plate 34 is fixed to the ends of the first side plate 32 and the second side plate 33, and the slide plate 34 and the bottom plate 31 are parallel to each other. The mounting portion 35 is located at the end of the slide 34. The mounting portion 35 is provided with a mounting hole 350, a catching groove 351, and an abutting portion 352. The shape of the mounting hole 350 corresponds to the shape of the catching portion 72 of the clip 70. The fastening groove 351 is communicated with the mounting hole 350, the fastening groove 351 is circular, and the diameter of the fastening groove 351 is the same as the length of the fastening portion 72. The interference portion 352 is located in the fastening groove 351. When the locking portion 72 rotates to the limit position in the locking groove 351, the locking portion 72 abuts against the abutting portion 352, and the abutting portion 352 positions the locking portion 72.

The slider 40 is mounted on the screw 23 and cooperates with the screw 23. When the screw 23 rotates, the slider 40 moves linearly.

The push rod 50 is slidably mounted to the slide 34 of the bracket 30. The push rod 50 is fixedly connected with the slide block 40, and the slide block 40 drives the push rod 50 to move relative to the bracket 30.

The syringe 60 is mounted to the holder 30, and the syringe 60 is positioned by the clip 70. The plunger of the push rod 50 is mounted in the syringe 60, and when the push rod 50 moves relative to the bracket 30, the plunger moves in the syringe 60 to achieve injection.

The clip 70 includes a base 71, a clip portion 72, and a clip portion 73. The engaging portion 72 and the holding portion 73 extend from opposite ends of the base 71, respectively. The engaging portion 72 has an elongated shape. The clamping portion 73 has a circular arc shape, and the diameter of the clamping portion 73 is the same as the outer diameter of the syringe 60.

The knob 80 is secured to the end of the syringe 60, and in particular, the knob 80 is an interference fit with the syringe 60.

A negative pressure chamber 90 is located at the end of knob 80. The negative pressure cavity 90 is of a hollow structure, the negative pressure cavity 90 is attached to the skin, when the negative pressure cavity 90 is negative pressure, the skin is lifted, and the needle 100 pierces the skin.

Needle 100 is mounted to knob 80 and is positioned in negative pressure cavity 90. The extension length of needle 100 (i.e., the length within negative pressure lumen 90) can be adjusted by knob 80. The number of the needles 100 is plural, and the plurality of needles 100 are uniformly arranged inside the negative pressure chamber 90. Specifically, needle 100 is a miniature needle that reduces the diameter of the needle aperture formed by needle 100. In this embodiment, the number of needles 100 is 6, and 6 needles 100 are arranged in two rows.

The encoder 101 is installed at the end of the motor 21, and the encoder 101 monitors the rotation speed of the motor 21 to precisely control the movement of the push rod 50, so that the medicine injection is precisely and stably performed.

When the water needle injection structure is assembled, the speed reducer 22 of the driving assembly 20 is fixed on the first side plate 32, the screw 23 is rotatably mounted on the second side plate 33, and the sliding block 40 is mounted on the screw 23 and matched with the screw 23. The push rod 50 is slidably mounted to the slide 34 of the bracket 30. The push rod 50 is fixedly connected with the slide block 40, and the slide block 40 drives the push rod 50 to move relative to the bracket 30. The syringe 60 is mounted to the holder 30, and the syringe 60 is positioned by the clip 70. The knob 80 is fixed to the distal end of the syringe 60, and the negative pressure chamber 90 is located at the end of the knob 80. Needle 100 is mounted to knob 80 and is positioned in negative pressure cavity 90.

When the water optical needle injection structure is used, the motor 21 receives an instruction through a circuit to rotate in a specified direction, the speed is reduced and the torque is increased after the motor passes through the speed reducer 22, the speed reducer 22 transmits the motion to the screw rod 23, the screw rod 23 transmits the motion to the sliding block 40, the sliding block 40 transmits the motion to the pushing rod 50 through the pushing rod 50, and the reagent is injected to the skin surface layer through the needle head 100.

The following is described in connection with specific embodiments:

the motor 21 is a DC brush motor (rated voltage 12V, rated rotational speed 6300 RPM), and the encoder 101 can monitor 16 pulses in one revolution, the reduction ratio of the speed reducer 22 is 375:1, and the lead of the screw 23 is 12mm.

At a rated voltage of 12V for 1s, the number of rotations of the dc brush motor 21 is: 6300 RPM/60=105 rad, the number of pulses monitored by the encoder 101 is 105rad 16=1680, the number of turns of the screw 23 after passing the decelerator 22: 105 rad/375=0.28 rad, the linear feed distance of the screw 23 is: 0.28rad x 12mm = 3.36mm, i.e. the stroke of the slider 40 pushing the plunger 50 forward for injection of 3.36mm, it is clear that the number of pulses of the encoder 101 has a direct mathematical relationship with the injection stroke of the injector 60. The relationship between the injection stroke of the injector 60 and the number of pulses monitored by the encoder 101 can be expressed as: s is S _{Injection stroke} ＝S _{Encoder monitors pulse count} /16/i _{Reduction ratio} *L _Lead Accurate control of the injection stroke of the injector 60 can thus be achieved by setting the encoder 101 pulse number monitoring threshold in advance.

In order to realize multi-stage speed regulation in the reagent propelling process, the invention adopts PWM to control the rotating speed of the motor 21. In order to ensure that the motor 21 is prevented from being influenced by resistance to generate fluctuation of speed in the moving process, the invention adopts a PID algorithm to carry out closed-loop speed control. The structure is simple, stable and reliable, and the precise pushing injection of the multi-needle water optical needle reagent can be realized.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, it is possible to make several modifications and improvements without departing from the concept of the present invention, which are equivalent to the above embodiments according to the essential technology of the present invention, and these are all included in the protection scope of the present invention.

Claims

1. The utility model provides a water light needle injection structure, includes negative pressure chamber, syringe needle, syringe and push rod, the syringe needle install in negative pressure intracavity, the syringe with the syringe needle intercommunication, the push rod install in syringe, its characterized in that: the hydraulic needle injection structure further comprises a support, a driving assembly and a sliding block, the push rod is slidably mounted on the support, the support is fixedly connected with the sliding block, the driving assembly comprises a motor, a speed reducer and a screw rod, the support comprises a bottom plate, a first side plate, a second side plate and a sliding plate, the first side plate and the second side plate are respectively fixed at two opposite ends of the bottom plate, the sliding plate is fixed on the first side plate and the second side plate, the sliding plate is parallel to the bottom plate, the screw rod is rotatably mounted on the first side plate and the second side plate, the push rod is slidably mounted on the sliding plate, the speed reducer is fixedly mounted on the support, the motor is connected with the speed reducer, the screw rod is connected with the speed reducer, the sliding block is matched with the screw rod, the motor drives the screw rod to rotate through speed reduction of the speed reducer, so that the sliding block drives the push rod to move relative to the injector, liquid in the injector passes through the smooth needle, the motor and the injector is mounted on the clamp device, and the injector clamp device is further comprises a clamp device for clamping the injector, and the clamp device.

2. The hydro-optical needle injection structure of claim 1, wherein: the clamping piece comprises a base and a clamping part, the clamping part extends from the base and comprises a mounting part, the mounting part is provided with a mounting hole and a clamping groove, the shape of the mounting hole corresponds to that of the clamping part, the clamping groove is circular and communicated with the mounting hole, the clamping part enters the clamping groove from the mounting hole and can rotate in the clamping groove, and the clamping part is in collision with the inner wall of the clamping groove to realize clamping.

3. The hydro-optical needle injection structure of claim 2, wherein: the mounting part further comprises an abutting part, the abutting part is located in the buckling groove, and the abutting part enables the buckling part to be limited.

4. The hydro-optical needle injection structure of claim 2, wherein: the clamping piece further comprises a clamping portion, the clamping portion extends out of the base, the clamping portion is arc-shaped, and the injector is located in the clamping portion.

5. The hydro-optical needle injection structure of claim 1, wherein: the hydro-optical needle injection structure further comprises a knob, the knob is fixed with the injector, the needle head is installed with the knob, and the knob adjusts the extending length of the needle head.

6. The hydro-optical needle injection structure of claim 5, wherein: the knob is in interference fit with the syringe.