CN117838205A - Skin sampling device - Google Patents

Abstract

The invention relates to the field of medical equipment and discloses a skin sampling device which comprises a shell, a pushing unit, a cutting unit and a spiral part, wherein the pushing unit, the cutting unit and the spiral part are arranged in the shell, the pushing unit comprises a screw rod, a sleeve sleeved on the screw rod and a rotating part for driving the screw rod to rotate, the screw rod is in sliding connection with the sleeve, the spiral part comprises a spiral rod with a cross section of a 'one' shape and a limiting rod fixedly connected with the spiral rod, the cutting unit comprises a spiral block and a cutting knife which are in rotating connection with the pushing unit, the spiral block is provided with a spiral groove and is in sliding connection with the spiral rod, the spiral block is in rotating connection with the end part of the sleeve, the sleeve is circumferentially provided with a plurality of first sliding grooves, the limiting rod penetrates through the first sliding grooves and is connected with the shell, the bottom of the shell is pressed on the skin, and the rotating part rotates to drive the sleeve to slide so as to cut the skin drilled by the cutting knife. So as to provide a dermatological clinical skin sampling device which is convenient to operate, low in operation difficulty and good in effect.

Description

Skin sampling device

Technical Field

The invention relates to the field of medical instruments, in particular to a skin sampling device.

Background

Skin biopsy is a traumatic clinical examination, and the final purpose of clear clinical diagnosis or treatment is achieved by taking local materials of lesions of skin diseases and performing histopathological examination. The skin is not a thin layer which we imagine, but a three-dimensional structure, and contains many accessory tissues such as hair follicles, sweat glands, blood vessels, etc. Skin diseases are all caused by lesions of these structures. However, these structures are microscopic structures and are not visible to the naked eye, and the tissue is cut under a microscope to find the specific condition of the lesion.

The most common method in clinic is trephine biopsy at present, because the damage is small and a certain cutting depth can be achieved. Trephine biopsy is performed with a hollow circular scalpel to cut lesions in the skin. The trephine is rotated clockwise and counterclockwise to cut the skin approximately 2-5 mm thick to the adipose tissue layer below the dermis layer, and then the cut tissue sample is removed and examined under a microscope. In the prior art, a part of medical staff in hospitals holds an annular knife to be inserted into the skin of a patient for sampling, on one hand, the hand-held sampling has higher requirement on the hand stability of the medical staff, ensures that the medical staff can be vertically inserted into the skin of the patient until the fat layer, and on the other hand, the medical staff is required not to displace or incline in the operation process, otherwise, the wound surface is easy to expand.

Disclosure of Invention

The invention aims to provide a skin sampling device which is convenient to operate, low in operation difficulty and good in effect.

In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a skin sampling device, including the casing and set up propulsion unit in the casing, cutting unit and screw portion, propulsion unit includes the lead screw, the sleeve pipe of cover on the lead screw and drive lead screw pivoted rotation portion, lead screw and sleeve pipe sliding connection, screw portion includes that a cross-section is the hob of "one" shape and with hob fixed connection's gag lever post, cutting unit includes the helicoid and the cutting knife of rotating with propulsion unit and being connected, it has the helicla flute and with hob sliding connection to open on the helicoid, the helicoid rotates with the sleeve pipe tip to be connected, sleeve pipe circumference is opened there is a plurality of first spouts, the gag lever post passes first spout and is connected with the casing, the casing bottom is pressed on the skin, rotation portion rotates and is used for driving the sleeve pipe and slides and bore the skin of cutting knife.

The principle in the technical scheme is as follows: the screw rod rotates to drive the sleeve to slide reciprocally, the screw block is rotationally connected with the end part of the sleeve, when the sleeve slides to push the screw block to slide along the screw rod, the screw rod starts to rotate, so that the cutting knife is in contact with the skin of a patient and pierces into the skin to a certain depth for sampling under the pushing of the sleeve, and the cutting knife synchronously rotates under the driving of the screw block in the process of piercing, so that the cutting knife can sample more smoothly, and simultaneously, the stimulation to the skin of the patient is reduced, and the rest skin of the patient is not damaged.

The beneficial effect of this scheme is: in the technical scheme, a screw rod is arranged concentrically with a shell, the shell is pressed on the skin, a limiting rod penetrates through a first sliding groove to be connected with the shell, the first sliding groove plays a guiding role on a sleeve, when a rotating part rotates to drive a cutting knife, the cutting knife can be ensured to vertically penetrate into the skin, the interference and damage to the rest of the skin of a patient can be minimized, the technical requirement on operators is reduced, the wound range is relatively small, the patient can recover faster, and possible complications are reduced; meanwhile, the rotating part can rotate at a constant speed and stably advance, so that the stability of the whole sampling process can be ensured, discomfort of a patient during operation is relieved, and the later recovery of the patient is facilitated.

The lead screw of propulsion unit can impel the sleeve pipe at the uniform velocity in this technical scheme, be equipped with the screw portion simultaneously and can let the cutting knife rotate and not only press in the propulsive, the cutting knife presses skin if the dynamics is too big probably to lead to cutting process skin surface deformation great, repair and sew up the certain not-force influence to the later stage, can more smooth in inserting skin and form regular incision when the cutting knife takes place to rotate, through the control to propulsion unit and screw portion, medical staff can control the degree of depth of sample more accurately, ensure to acquire sufficient tissue in order to carry out accurate pathology inspection, and need fully consider patient's comfort level, ensure that the process of sampling is not effective but not arouse unnecessary misery.

Preferably, as an improvement, the device further comprises a pressing unit, wherein the pressing unit comprises a first pressing sheet, a connecting rod, a first spring and a pressing ring which is arranged in the shell in a sliding manner, the first pressing sheet is annular and provided with a plurality of holes, and the first pressing sheet is connected with the pressing ring through a plurality of first springs; the quantity of gag lever post is 4 and circumference equipartition on the hob, opens there is the second spout on the casing, and two relative gag lever posts pass the second spout and with second spout sliding connection, two other remaining gag lever posts and shells inner wall butt, and the both sides of these two gag lever posts all are equipped with the spacing with the casing is fixed, presses the ring and passes through connecting rod and gag lever post fixed connection.

The beneficial effects are as follows: through above-mentioned setting before the cutting, the downwardly sliding gag lever post drives first preforming even pressure on patient's skin, and is equipped with a plurality of springs and provides pressure and make first preforming pressfitting patient's skin, and great pressure of cutting knife takes place deformation when avoiding the sample skin to receive the skin and leads to the sample position inaccurate, stability and accuracy when guaranteeing the sample. According to the technical scheme, two remaining limiting rods are abutted against the inner wall of the shell, limiting strips fixed to the shell are arranged on two sides of the two limiting rods, the sliding track of the pressing unit can be limited through the arrangement, namely, the first pressing piece is evenly attached to the skin of a patient by vertically sliding, and meanwhile, the two limiting rods are abutted against the shell to ensure that the screw rod is concentric with the shell, so that axial deviation during sampling is avoided. The first tabletting is annular and is provided with a plurality of holes, so that seepage liquid generated during cutting can be discharged in time, and the influence of seepage liquid seepage on operation is avoided.

Preferably, as an improvement, a plurality of limiting blocks are fixed on the first pressing sheet, a round groove is formed in the center of each limiting block, a round groove is formed in the surface, opposite to the limiting blocks, of each pressing ring, and two ends of each first spring are embedded into the round grooves and are fixedly connected with the limiting blocks and the pressing rings respectively.

The beneficial effects are as follows: through fixed stopper on first preforming, the stopper center is opened there is the circular slot to and pressing ring and stopper relative surface also open there is the circular slot, can restrict the position of first spring effectively, with the in-process that ensures the spring and keep stable position of pressing, can not take place not hard up or skew, on the other hand can make the elasticity of first spring press perpendicularly at skin surface, ensures skin surface leveling before the cutting.

Preferably, as an improvement, a fixed block is fixed on the screw rod, the limiting rods are fixedly connected with the fixed block, the upper surface of the fixed block is provided with a mounting groove, the surface of the screw rod opposite to the fixed block is also provided with a mounting groove, and a second spring is embedded in the mounting groove; the bottom of the screw rod is detachably connected with a second pressing piece.

The beneficial effects are as follows: the second preforming can press the middle part of cutting skin, can play preliminary location's effect to the center of sample skin, can wait to cut the skin and be located the center of cutting knife through the preliminary observation of second preforming, this helps guaranteeing the accuracy of sampling position, has improved the accuracy nature of sampling. The first preforming presses around the sample skin, and the second preforming presses the middle part of cutting skin, realizes pressing down the stability of whole skin region in the sample in-process, avoids deformation, improves the stability and the accuracy of sample. On the other hand, when the cutting knife finishes retreating the knife, the second pressing piece can be pressed on the skin after cutting, so that broken middle parts of the separated superficial skin caused by the fact that the separated superficial skin withdraws along with the cutting knife are avoided, and follow-up accurate cutting is facilitated. The bottom of the screw rod is detachably connected with a second pressing piece, so that the second pressing piece can be conveniently replaced or cleaned, and the maintainability and the operability of the equipment are improved; on the other hand, through changing the second preforming of equidimension, when the second preforming can cover in the sample department, just can audio-visually observe whether wait that the alignment area of cutting knife covers completely and wait to take a sample department.

Preferably, as an improvement, the cutting unit comprises a cutter holder, the cutter holder is fixedly connected with the spiral block, the cutter is clamped and fixed below the cutter holder, the cutter is annular, and liquid seepage slits are formed in two sides of the cutter.

The beneficial effects are as follows: the cutting knife is annular, so that a complete annular incision can be formed in the cutting process, and later suturing and repairing are facilitated. The design that the two sides of the cutting knife are provided with the seepage slots can be helpful for timely discharging seepage generated in the sampling process. This helps to keep the sampling area clean and prevents seepage from affecting the sample; the cutter is clamped and fixed below the cutter seat, and the cutter is likely to be replaced or maintained more easily due to the design.

Preferably, as an improvement, an observation hole is formed in the lower side of the shell, and LED lamp beads are embedded around the observation hole.

The beneficial effects are as follows: the medical staff can observe the sampling process in real time in the operation process by arranging the observation holes, which is very helpful for ensuring the accuracy of the sampling position, avoiding misoperation and adjusting the position of the equipment at any time. The embedded surrounding LED lamp beads provide sufficient illumination, ensure that the sampling area has sufficient brightness, are beneficial to medical staff to clearly see the details of the skin surface, and have positive influence on the accuracy and success rate in the sampling process.

Preferably, as an improvement, a soft silica gel pad is arranged at the bottom of the shell, and the soft silica gel pad has certain viscosity.

The beneficial effects are as follows: before the operation, after the skin of the accessory to be cut is spread and leveled by hand, the soft silica gel pad is attached to the accessory to be cut, and the soft silica gel pad has certain viscosity, so that the shell can be stably fixed on the skin surface of a patient, unexpected movement or sliding of equipment in the sampling process can be prevented, and the accuracy of sampling can be ensured. Meanwhile, the silica gel has a certain thickness and softness, so that the silica gel can be attached to the skin of a patient, the skin of a human body is not a complete plane, the soft silica gel pad can play a certain role in leveling, discomfort during operation is reduced, and the accuracy of operation is improved.

Preferably, as an improvement, a display screen, a controller and a displacement sensor are further arranged, the displacement sensor is provided with two probes, one probe is connected to the screw rod, the other probe is connected to the tool apron, and the displacement sensor is connected with the display screen through the controller.

The beneficial effects are as follows: the current trephine is difficult for controlling the degree of depth of drawing materials, if the degree of depth is insufficient, can cause the failure of drawing materials, and the degree of depth is excessive, then can influence patient later stage's recovery rate, carries out automatically under the control of controller when the sampling process, reduces medical personnel's work load on the one hand, on the other hand can improve the rate of accuracy of sampling.

Preferably, as an improvement, the two sides of the second chute are provided with ratchets, and the cross section of the contact part of the limiting rod and the second chute is conical, so that the limiting rod can slide in the second chute in one way.

The beneficial effects are as follows: through above-mentioned setting, can realize the unidirectional slip of gag lever post in the second spout, promptly after closing the casing on patient's skin, can the singlehanded push down gag lever post for first preforming and second preforming evenly press on patient's skin surface, with the gag lever post slide to suitable position can, improve medical staff to the accurate control of pressing the unit dynamics of pushing down, improved the controllability of operation, reduce the operation degree of difficulty.

Preferably, as an improvement, the rotating portion includes a servo motor capable of rotating in the forward and reverse directions.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is a schematic diagram of a screw rod and screw rod connection according to an embodiment of the present invention;

FIG. 3 is a schematic view illustrating the cooperation of a sleeve and a stop lever according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a pressing unit according to an embodiment of the present invention;

FIG. 5 is a schematic view of the external structure of an embodiment of the present invention;

FIG. 6 is a schematic diagram of a screw block according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a second chute according to an embodiment of the invention

FIG. 8 is a schematic view of a screw rod according to an embodiment of the present invention;

fig. 9 is a schematic view of the first and second compression sheets simultaneously compressing skin according to an embodiment of the present invention.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the device comprises a shell 1, a screw rod 2, a sleeve 3, a screw rod 4, a limit rod 5, a cutting knife 6, a screw block 7, a screw groove 8, a first chute 9, a first pressing piece 10, a connecting rod 11, a first spring 12, a second chute 13, a limit bar 14, a bearing 15, a limit block 16, a fixed block 17, a mounting groove 18, a second spring 19, a second pressing piece 20, a tool apron 21, a liquid seepage slit 22, an observation hole 23, a soft silica gel pad 24, a display screen 25, a ratchet 26, a servo motor 27 and a pressing ring 28.

Examples

The embodiment is basically as shown in fig. 1-9, and the skin sampling device as shown in fig. 1 and 5 comprises a shell 1, a propulsion unit, a cutting unit and a spiral part, wherein the propulsion unit is arranged in the shell 1, the propulsion unit comprises a screw rod 2, a sleeve 3 sleeved on the screw rod 2 and a rotating part for driving the screw rod 2 to rotate, the rotating part comprises a servo motor 27 capable of rotating positively and negatively, the servo motor 27 is fixedly connected with the shell 1, and an output shaft of the servo motor 27 is connected with the screw rod. As shown in fig. 2 and 3, the screw rod 2 is in threaded sliding connection with the sleeve 3, so that the screw rod 2 rotates to drive the sleeve 3 to slide reciprocally, the screw part comprises a screw rod 4 with a cross section of a 'one' shape and a limit rod 5 fixedly connected with the screw rod 4, the cutting unit comprises a screw block 7 rotationally connected with the propulsion unit and a cutting knife 6, as shown in fig. 6, the screw block 7 is provided with a screw groove 8 and is in sliding connection with the screw rod 4, in this embodiment, the screw block 7 is rotationally connected with the end part of the sleeve 3 through a bearing 15, the sleeve 3 is circumferentially provided with a plurality of first sliding grooves 9, the limit rod 5 passes through the first sliding grooves 9 and is in sliding connection with the shell 1, and the rotation part rotates to drive the sleeve 3 to slide and drill the skin of the cutting knife 6. The cutting unit in this embodiment includes blade holder 21, blade holder 21 and spiral piece 7 fixed connection, and cutting knife 6 joint is fixed in blade holder 21 below, and cutting knife 6 is cyclic annular, and cutting knife 6 both sides are opened there is the weeping seam 22, and cutting knife 6 is cyclic annular, helps forming a complete annular incision in the cutting process, is convenient for later stage sew up and restore. The design of the two sides of the cutter blade 6 with the liquid seepage slits 22 may help to timely drain the liquid seepage generated in the sampling process.

As shown in fig. 4, the device further comprises a pressing unit, the pressing unit comprises a first pressing sheet 10, a connecting rod 11, a first spring 12 and a pressing ring 28 slidably arranged in the shell 1, the first pressing sheet 10 is annular and provided with a plurality of holes, so that seepage liquid generated during cutting is discharged in time, and the influence of seepage liquid seepage on operation is avoided. The first pressing piece 10 is connected with the pressing ring 28 through a plurality of first springs 12; the quantity of gag lever post 5 is 4 and circumference equipartition on hob 4, it has second spout 13 to open on casing 1, two relative gag lever posts 5 pass second spout 13 and with second spout 13 sliding connection, as shown in fig. 7, second spout 13 both sides are equipped with ratchet 26, gag lever post 5 and the contact department cross-section of second spout 13 is the toper, realize gag lever post 5 unidirectional slip in second spout 13, ratchet 26 is the plastics material that has elasticity in this embodiment, unidirectional slip card is after the settlement position, can use great power push gag lever post 5 to reset after the later stage completion sample. The other two remaining limiting rods 5 are vertically and slidably connected with the inner wall of the shell 1, limiting strips 14 fixed with the shell 1 are arranged on two sides of the two limiting rods 5, the sliding track of the pressing unit can be limited through the arrangement, namely, the first pressing sheet 10 is uniformly attached to the skin of a patient by vertically sliding, and meanwhile, the two limiting rods 5 are in abutting contact with the shell 1, so that the screw rod 4 and the shell 1 can be ensured to be concentric, and the axial center deviation during sampling is avoided. The pressing ring 28 is fixedly connected with the limit rod 5 through the connecting rod 11. In this embodiment, a plurality of limiting blocks 16 (specifically 5 in this embodiment) are fixed on the first pressing sheet 10, the center of each limiting block 16 is provided with a circular groove, the surface of each pressing ring 28 opposite to each limiting block 16 is also provided with a circular groove, the upper end and the lower end of each first spring 12 are embedded into the circular grooves and are respectively and fixedly connected with the limiting blocks 16 and the pressing rings 28 through welding, the stable position of each first spring 12 is ensured to be kept in the pressing process, looseness or deviation cannot occur, on the other hand, the elastic force of each first spring 12 can be enabled to be vertically pressed on the surface of skin, the surface of the skin is ensured to be flat before cutting, and subsequent cutting is facilitated.

The screw rod 4 is fixedly provided with a fixed block 17, the limiting rod 5 is fixedly connected with the fixed block 17, the upper surface of the fixed block 17 is provided with a mounting groove 18, the surface of the screw rod 2 opposite to the fixed block 17 is also provided with a mounting groove 18, and a second spring 19 is embedded in the mounting groove 18; the bottom of the spiral rod 4 is detachably connected with the second pressing piece 20, in this embodiment, the first pressing piece 10 presses the periphery of the skin to be sampled, the second pressing piece 20 presses the middle of the skin to be cut, stable pressing of the whole skin area is achieved in the sampling process, the stability and accuracy of sampling are improved, in this embodiment, as shown in fig. 9, the first pressing piece 10 and the second pressing piece 20 simultaneously press the skin, the skin section in the gap is in a protruding shape, when the cutting knife 6 penetrates the skin downwards, the skin just penetrates the protruding skin, compared with loose skin, the skin which is tightly supported is more suitable for penetrating the skin, uneven cutting can be avoided, and subsequent healing is facilitated; in addition, when the cutting knife 6 finishes cutting and retreats, the second pressing piece 20 can press on the skin after cutting, so that the broken middle of the separated superficial skin caused by the fact that the separated superficial skin retreats together with the cutting knife 6 is avoided, and the follow-up accurate cutting is facilitated. The second pressing piece 20 is detachably connected, so that on one hand, the second pressing piece 20 can be conveniently replaced or cleaned, and the maintainability and the operability of equipment are improved; on the other hand through changing the second preforming 20 of equidimension, when second preforming 20 can cover in the sample department, just can directly perceivedly observe whether wait that the alignment area of cutting knife 6 covers completely and wait to take a sample the department, simultaneously when second preforming 20 presses on the skin surface, because the axis of cutting knife 6 is parallel with the axis of hob 4, when second preforming 20 and skin surface laminating, can confirm that cutting knife 6 slides along hob 4 and is perpendicularly pierces patient's skin, can take out complete cylindrical sample.

An observation hole 23 is formed in the lower side of the shell 1, and LED lamp beads are embedded around the observation hole 23. By providing the viewing aperture 23, medical staff can observe the sampling process in real time during operation, which is very helpful for ensuring the accuracy of the sampling position, avoiding misoperation and adjusting the position of the device at any time. The embedded surrounding LED lamp beads provide sufficient illumination, ensure that the sampling area has sufficient brightness, are beneficial to medical staff to clearly see the details of the skin surface, and have positive influence on the accuracy and success rate in the sampling process. The bottom of the shell 1 is provided with the soft silica gel pad 24, the soft silica gel pad 24 has certain viscosity, can enable the shell 1 to be stably fixed on the skin surface of a patient, is favorable for preventing accidental movement or sliding of equipment in the sampling process, the silica gel has certain thickness and softness, can enable the soft silica gel pad to be attached to the skin of the patient, the skin of a human body is not a complete plane, and the soft silica gel pad 24 can play a certain leveling role, reduce discomfort in operation and improve the accuracy of operation.

The device is also provided with a display screen 25, a controller and a displacement sensor, wherein the displacement sensor is provided with two probes, one probe is connected to the screw rod 4, the other probe is connected to the tool apron 21, and the displacement sensor is connected with the display screen 25 through the controller. When the sampling process is automatically carried out under the control of the controller, the workload of medical staff is reduced on one hand, and the sampling accuracy rate can be improved on the other hand.

The specific implementation process is as follows:

1. before operation, after the skin near the place to be cut is spread and flattened by hand, the soft silica gel pad 24 is attached to the place, and the soft silica gel pad 24 has certain viscosity, so that the shell 1 can be stably fixed on the skin surface of a patient, unexpected movement or sliding of equipment in the sampling process can be prevented, and the accuracy of sampling can be ensured.

2. Before the cutting, the gag lever post 5 slides downwards, drives first preforming 10 evenly to press on patient's skin, carries out preliminary location, and is equipped with a plurality of springs and provides pressure and make first preforming 10 pressfitting patient's skin, and the great pressure of cutting knife 6 takes place deformation when avoiding the sample skin and leads to the sample position inaccurate, stability and the accuracy when guaranteeing the sample.

3. After the servo motor 27 is started, the screw rod 2 rotates to drive the sleeve 3 to slide reciprocally, the spiral block 7 is rotationally connected with the end part of the sleeve 3, when the sleeve 3 slides to push the spiral block 7 to slide along the spiral rod 4, the spiral rod 4 starts to rotate, so that the cutting knife 6 is in contact with the skin of a patient and penetrates into the skin to be sampled at a certain depth under the pushing of the sleeve 3, the cutting knife 6 synchronously rotates under the driving of the spiral block 7 in the penetrating process, the cutting knife 6 can sample more smoothly, the stimulation to the skin of the patient is reduced, and the rest skin of the patient is not damaged.

In the technical scheme, a screw rod 2 is arranged concentrically with a shell 1, the shell 1 is pressed on the skin, a limiting rod 5 passes through a first sliding groove 9 to be connected with the shell 1, the first sliding groove 9 plays a guiding role on a sleeve 3, when a rotating part rotates to drive a cutting knife 6, the cutting knife 6 can be ensured to vertically penetrate the skin, the interference and damage to the rest of the skin of a patient can be minimized, the technical requirement on an operator is reduced, the wound scope is relatively smaller, the patient is helped to recover faster, and possible complications are reduced; meanwhile, the rotating part can rotate at a constant speed and stably advance, so that the stability of the whole sampling process can be ensured, discomfort of a patient during operation is relieved, and the later recovery of the patient is facilitated.

The lead screw 2 of propulsion unit among this technical scheme can impel sleeve pipe 3 at the uniform velocity, be equipped with the screw portion simultaneously and can let cutting knife 6 rotate rather than just press in the propulsive, cutting knife 6 presses skin if the dynamics is too big probably to lead to cutting process skin surface deformation great, repair and sew up to the later stage and have certain not enough influence, can more smooth in inserting skin and form regular incision when cutting knife 6 takes place to rotate, through the control to propulsion unit and screw portion, medical staff can control the degree of depth of sample more accurately, ensure to acquire sufficient tissue in order to carry out accurate pathology inspection, and need fully consider patient's comfort level, ensure that the process of sampling is not only effective but also not arouse unnecessary misery.

The foregoing is merely exemplary of the present invention, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present invention, and these should also be regarded as the protection scope of the present invention, which does not affect the effect of the implementation of the present invention and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (10)

1. A skin sampling device, characterized in that: including the casing and set up propulsion unit, cutting unit and screw portion in the casing, propulsion unit includes the lead screw, the sleeve pipe of cover on the lead screw and drive lead screw pivoted rotation portion, lead screw and sleeve pipe sliding connection, screw portion includes that a cross-section is the hob of "one" shape and the gag lever post with hob fixed connection, cutting unit includes the helicoid and the cutting knife of rotating with propulsion unit and being connected, it has the helicla flute and with hob sliding connection to open on the helicoid, the helicoid rotates with the sleeve pipe tip to be connected, sleeve pipe circumference is opened there is a plurality of first spouts, the gag lever post passes first spout and is connected with the casing, the casing bottom is pressed on skin, rotation portion rotates and is used for driving the sleeve pipe and slides in order to excision the skin that the cutting knife bored.

2. A skin sampling device according to claim 1, wherein: the pressing unit comprises a first pressing piece, a connecting rod, a first spring and a pressing ring which is arranged in the shell in a sliding manner, wherein the first pressing piece is annular and provided with a plurality of holes, and the first pressing piece is connected with the pressing ring through a plurality of first springs; the quantity of gag lever post is 4 and circumference equipartition on the hob, opens there is the second spout on the casing, and two relative gag lever posts pass the second spout and with second spout sliding connection, two other remaining gag lever posts and shells inner wall butt, and the both sides of these two gag lever posts all are equipped with the spacing with the casing is fixed, presses the ring and passes through connecting rod and gag lever post fixed connection.

3. A skin sampling device according to claim 2, wherein: a plurality of limiting blocks are fixed on the first pressing sheet, round grooves are formed in the centers of the limiting blocks, round grooves are formed in the surfaces, opposite to the limiting blocks, of the pressing ring, and two ends of the first spring are embedded into the round grooves and are fixedly connected with the limiting blocks and the pressing ring respectively.

4. A skin sampling device according to claim 3, wherein: the screw rod is fixedly provided with a fixed block, the limiting rods are fixedly connected with the fixed block, the upper surface of the fixed block is provided with a mounting groove, the surface of the screw rod opposite to the fixed block is also provided with a mounting groove, and a second spring is embedded in the mounting groove; the bottom of the screw rod is detachably connected with a second pressing piece.

5. The skin sampling device of claim 4, wherein: the cutting unit comprises a cutter seat, the cutter seat is fixedly connected with the spiral block, the cutter is clamped and fixed below the cutter seat, the cutter is annular, and liquid seepage slits are formed in two sides of the cutter.

6. A skin sampling device according to claim 5, wherein: an observation hole is formed in the lower side of the shell, and LED lamp beads are embedded around the observation hole.

7. A skin sampling device according to claim 6, wherein: the bottom of the shell is provided with a soft silica gel pad which has certain viscosity.

8. A skin sampling device according to claim 7, wherein: the device is also provided with a display screen, a controller and a displacement sensor, wherein the displacement sensor is provided with two probes, one probe is connected to the screw rod, the other probe is connected to the tool apron, and the displacement sensor is connected with the display screen through the controller.

9. A skin sampling device according to claim 8, wherein: the ratchet teeth are arranged on two sides of the second chute, and the cross section of the contact part of the limiting rod and the second chute is conical, so that the limiting rod can slide in the second chute in one way.

10. A skin sampling device according to claim 9, wherein: the rotating part comprises a servo motor capable of rotating positively and negatively.