Injection device

Abstract

The utility model discloses an injection device, and relates to the technical field of medical instruments, the injection device comprises a shell and a treatment head, the shell is provided with a mounting cavity and an infusion mechanism arranged in the mounting cavity, and the infusion mechanism comprises a selection driving piece, a liquid storage assembly and a first linear driving piece; the liquid storage assembly is connected to the output end of the selection driving part and comprises at least one first liquid storage cavity used for storing first liquid medicine, a first plunger constructed to move in the first liquid storage cavity, at least one second liquid storage cavity used for storing second liquid medicine and a second plunger constructed to move in the second liquid storage cavity; the treatment head is detachably connected to the shell and provided with a liquid guide cavity communicated with the liquid storage assembly, the treatment head comprises at least one hollow needle, and the hollow needle is communicated with the liquid guide cavity. According to the technical scheme, the injection device can inject different liquid medicine according to different subcutaneous depths during treatment.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an injection device. Background Technology

[0002] Hyaluronic acid injection is a common cosmetic injection method that involves injecting nutrients into the surface of the skin to improve skin quality, increase hydration and radiance, reduce wrinkles and fine lines, and lighten pigmentation.

[0003] Injecting different doses of nutrients into different skin layers can better promote skin regeneration and repair, reducing discomfort and recovery time. However, existing injection devices generally can only store one type of medication, and can only inject one type of medication at a time during treatment, making it impossible to inject different medications into different skin layers in a single treatment, resulting in poor treatment efficiency. Utility Model Content

[0004] The main objective of this invention is to provide an injection device that allows for the injection of different medications into different skin layers during treatment.

[0005] To achieve the above objectives, this utility model proposes an injection device for skin care and treatment, the injection device comprising:

[0006] A housing, the housing having a mounting cavity and an infusion mechanism including an infusion mechanism disposed in the mounting cavity, the infusion mechanism including a selection drive, a reservoir assembly, and a first linear drive; the reservoir assembly is connected to the output end of the selection drive, the reservoir assembly including at least one first reservoir for storing a first drug solution and a first plunger reciprocating within the first reservoir, and at least one second reservoir for storing a second drug solution and a second plunger reciprocating within the second reservoir; and

[0007] A treatment head is detachably connected to the housing and has a liquid guiding cavity communicating with the liquid storage assembly. The treatment head includes at least one hollow needle, which is connected to the liquid guiding cavity.

[0008] The selective drive unit drives the liquid storage assembly to move relative to the housing so that at least one of the first liquid storage chambers or at least one of the second liquid storage chambers is selectively connected to the liquid guiding chamber. When the first linear drive unit drives the first plunger or the second plunger to move a preset length toward the skin, a preset dose of the first or second drug solution selectively flows into the liquid guiding chamber and is injected into the skin through the hollow needle.

[0009] In one embodiment, the treatment head further includes a needle hub, the fluid guiding cavity is formed within the needle hub, and one end of the hollow needle passes through the needle hub and communicates with the fluid guiding cavity; the injection device further includes a second linear drive member disposed in the mounting cavity, the needle hub is connected to the output end of the second linear drive member, and the second linear drive member is used to drive the needle hub to drive the hollow needle to be inserted into the skin.

[0010] In one embodiment, the infusion mechanism further includes an infusion tube, the two ends of which are respectively connected to the liquid storage component and the liquid guiding cavity; the infusion mechanism further includes an adjustment component disposed at the front end of the liquid storage component, the adjustment component being used to open / close the fluid channel between the first liquid storage cavity or the second liquid storage cavity and the liquid guiding cavity.

[0011] In one embodiment, the regulating component includes a liquid outlet and a one-way valve. The liquid outlet has a liquid outlet chamber and an inlet and an outlet communicating with the liquid outlet chamber. The one-way valve is located at the inlet. The inlet is communicating with the liquid storage component, and the outlet is communicating with the infusion pipe.

[0012] In one embodiment, the injection device further includes a controller disposed in the mounting cavity and a user interface electrically connected to the controller, the user interface being configured to allow a user to select multiple depths to which the needle is to be inserted and the type and dosage of the drug solution to be applied at each depth.

[0013] In one embodiment, the controller is electrically connected to the selection drive, the first linear drive, and the second linear drive, respectively. The controller is responsive to multiple depths selected by the user and the type and dosage of the medication selected by the user at each depth, and is configured to: control the second linear drive to drive the hollow needle into the skin to the multiple depths, and control the selection drive to drive the movement of the reservoir assembly at each depth to select the first reservoir or the second reservoir to be connected to the guide cavity;

[0014] The first linear drive is controlled to push the first plunger or the second plunger to move a preset length to output a first or second dose of medicine to the skin.

[0015] In one embodiment, during multiple depths in which the hollow needle is driven into the skin, the controller controls the hollow needle to perform at least one injection, and the method of outputting a user-selected dose of a first or second drug solution to the skin includes: a continuous release method or a layered release method.

[0016] In one embodiment, the injection device further includes a negative pressure unit located at the end of the treatment head away from the housing and electrically connected to the controller. The negative pressure unit is used to adsorb skin.

[0017] In one embodiment, the injection device further includes a pressure sensor disposed on the treatment surface of the treatment head and electrically connected to the controller, the pressure sensor being used to detect whether the treatment head is in close contact with the skin.

[0018] In one embodiment, the treatment head further includes a radiofrequency microneedle connected to the needle hub and electrically connected to the controller, the radiofrequency microneedle being used to release electrical energy.

[0019] In this invention, the injection device includes a housing and a treatment head, with the housing forming an installation cavity. An infusion mechanism is located within the installation cavity, comprising a selection drive, a reservoir assembly, and a first linear drive. The reservoir assembly is connected to the output end of the selection drive and includes at least one first reservoir for storing a first drug solution and a first plunger movable within the first reservoir, as well as at least one second reservoir for storing a second drug solution and a second plunger movable within the second reservoir. The treatment head is connected to the housing and has a guiding cavity. The treatment head includes at least one hollow needle communicating with the guiding cavity. During treatment, the selection drive drives the reservoir assembly to move, causing one of the first reservoir assemblies to... The liquid chamber is connected to the liquid guide chamber of the treatment head. A first linear drive pushes the plunger in the first liquid reservoir towards the liquid reservoir, causing the first medication in the first liquid reservoir to flow into the liquid guide chamber. The first medication in the liquid guide chamber can be injected into the skin through a hollow needle inserted into the skin. After the first medication injection is completed, a selectable drive can move the liquid reservoir assembly again, connecting a second liquid reservoir to the liquid guide chamber of the treatment head. The first linear drive then pushes the plunger in the second liquid reservoir towards the liquid reservoir, causing the second medication in the second liquid reservoir to flow into the liquid guide chamber. The second medication in the liquid guide chamber can be injected into the skin through a hollow needle inserted into the skin. The dosage of the injected medication can be determined by the length of the plunger's movement. This injection device can inject at least two medications into the skin in a single treatment, improving the treatment efficiency and effectiveness. When the selectable drive moves the liquid reservoir assembly, the doctor can change the depth of the hollow needle insertion into the skin, thus enabling targeted injection of different medications into different skin layers, achieving layered injection treatment for mesotherapy and further improving the treatment effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the injection device in one embodiment of this utility model;

[0022] Figure 2 A schematic diagram of the infusion mechanism in one embodiment of this utility model;

[0023] Figure 3 Another structural schematic diagram of the infusion mechanism provided in one embodiment of this utility model;

[0024] Figure 4 for Figure 3 Cross-sectional view at point A-A'.

[0025] Explanation of icon numbers:

[0026] 100. Injection device; 1. Housing; 11. Mounting cavity; 2. Infusion mechanism; 21. Selection drive; 22. First linear drive; 221. Push rod; 23. Liquid storage assembly; 231. Turntable; 232. Liquid storage cylinder; 233. Rotating shaft; 234. First liquid storage chamber; 235. Second liquid storage chamber; 236. Third liquid storage chamber; 24. Dispensing component; 25. Infusion tube; 3. Treatment head; 31. Hollow needle; 32. Needle seat; 33. Liquid guiding chamber; 34. Second linear drive; 35. Radiofrequency microneedle.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] Among related technologies, hyaluronic acid injection is a common cosmetic injection method. It involves injecting nutrients into the surface of the skin to improve skin quality, increase moisture and radiance, reduce wrinkles and fine lines, and lighten pigmentation.

[0032] Injecting different doses of nutrients at different skin depths can better promote skin regeneration and repair, reducing discomfort and recovery time. However, existing injection devices generally can only store one type of medication, and can only inject one type of medication at a time during treatment. This makes it impossible to inject different medications at different skin depths in a single treatment, resulting in poor treatment efficiency.

[0033] Based on the above issues and ideas, please refer to the following: Figures 1 to 4As shown, this utility model proposes an injection device 100 for skin care and treatment. The injection device 100 includes a housing 1 and a treatment head 3. The housing 1 has a mounting cavity 11 and an infusion mechanism 2 disposed in the mounting cavity 11. The infusion mechanism 2 includes a selection drive 21, a reservoir assembly 23, and a first linear drive 22. The reservoir assembly 23 is connected to the output end of the selection drive 21. The reservoir assembly 23 includes at least one first reservoir cavity 234 for storing a first drug solution and a first plunger movable within the first reservoir cavity 234, and at least one second reservoir cavity 235 for storing a second drug solution and a first plunger movable within the second reservoir cavity 235. The treatment head 3 is detachably connected to the housing 1 and has a fluid guiding cavity 33 communicating with the fluid storage assembly 23. The treatment head 3 includes at least one hollow needle 31, which is connected to the fluid guiding cavity 33. The selective drive member 21 drives the fluid storage assembly 23 to move relative to the housing 1 so that at least one first fluid storage cavity 234 or at least one second fluid storage cavity 235 is selectively connected to the fluid guiding cavity 33. When the first linear drive member 22 drives the first plunger or the second plunger to move a preset length toward the skin, a preset dose of the first or second drug solution selectively flows to the fluid guiding cavity 33 and is injected into the skin through the hollow needle 31.

[0034] In this embodiment, the liquid storage assembly 23 is provided with at least one first liquid storage chamber 234 and at least one second liquid storage chamber 235. The first liquid storage chamber 234 is used to pre-store the first liquid, and the second liquid storage chamber 235 is used to store the second liquid. When the injection device 100 performs treatment, the selector drive 21 drives the liquid reservoir assembly 23 to move, so that one of the first liquid reservoirs 234 is connected to the liquid guide cavity 33 of the treatment head 3. Then, the first linear drive 22 pushes the first plunger in the first liquid reservoir 234 in the direction of the liquid guide cavity 33, so that the first drug solution in the first liquid reservoir 234 flows into the liquid guide cavity 33. The drug solution in the liquid guide cavity 33 can be injected into the skin through the skin-inserting hollow needle 31. After the first drug solution is injected, the selector drive 21 can drive the liquid reservoir assembly 23 to move again, so that a second liquid reservoir 235 is connected to the liquid guide cavity 33 of the treatment head 3. Then, the first linear drive 22 pushes the second plunger in the second liquid reservoir 235 in the direction of the liquid guide cavity 33, so that the second drug solution in the second liquid reservoir 235 flows into the liquid guide cavity 33. The second drug solution in the liquid guide cavity 33 can be injected into the skin through the skin-inserting hollow needle 31. The dosage of the injected drug solution can be determined according to the pushing length of the plunger in the corresponding liquid reservoir. Such an injection device 100 can inject at least two medications into the skin in a single treatment to improve treatment efficiency and effectiveness. When the drive unit 21 drives the liquid reservoir 23 to move, the doctor can set and change the depth of the hollow needle 31 inserted into the skin, thereby enabling targeted injection of different medications into different skin layers, further improving the therapeutic effect of the injection device 100.

[0035] It is understandable that the liquid storage assembly 23 may also be provided with a third liquid storage chamber 236, a fourth liquid storage chamber, or more liquid storage chambers, without specific limitations here. This can increase the types of liquid medication that the liquid storage assembly 23 can store, thereby meeting more treatment needs. Each liquid storage chamber is provided with a plunger, which can prevent the liquid medication in the liquid storage chamber from leaking through atmospheric pressure. The output end of the first linear drive 22 is set to the first liquid storage chamber 234 or the second liquid storage chamber 235 that is connected to the liquid guiding chamber 33. When the injection device 100 injects, the output end of the first linear drive 22 can extend into the first liquid storage chamber 234 or the second liquid storage chamber 235 to push the first plunger or the second plunger. It is understandable that the selected drive 21 drives the liquid storage assembly 23 to move. This movement includes, but is not limited to, rotation, movement, sliding, and rotation that cause changes in the physical position between the liquid storage assembly 23 and the housing. Of course, before selecting the drive unit 21 to drive the liquid storage assembly 23 to move, the output end of the first linear drive unit 22 is pulled out from the first liquid storage chamber 234 or the second liquid storage chamber 235 to avoid affecting the movement of the liquid storage assembly 23.

[0036] Optionally, the treatment head 3 is connected to the housing 1 via a detachable connection method such as a snap-fit ​​structure or screw connection, to facilitate regular cleaning, disinfection, or replacement; no specific limitation is made here. The medication includes liquid or semi-liquid solutions, compound solutions, suspensions, gels, etc.; specific ingredients include hyaluronic acid, collagen, regenerating microspheres, biological factors, amino acids, vitamins, peptides, high molecular weight polysaccharides or their salts, and other nutrients that improve skin condition.

[0037] In one embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the treatment head 3 also includes a needle seat 32, a fluid guiding cavity 33 is formed in the needle seat 32, and one end of the hollow needle 31 passes through the needle seat 32 and communicates with the fluid guiding cavity 33; the injection device 100 also includes a second linear drive 34 disposed in the mounting cavity 11, the needle seat 32 is connected to the output end of the second linear drive 34, and the second linear drive 34 is used to drive the needle seat 32 to drive the hollow needle 31 to be inserted into the skin.

[0038] In this embodiment, the hollow needle 31 is hollow inside and penetrates the side wall of the needle holder 32 facing the treatment surface, so as to communicate with the liquid guiding cavity 33 formed by the needle holder 32. In this way, the liquid in the liquid guiding cavity 33 can be output to the skin through the hollow needle 31. Multiple hollow needles 31 can be provided, and multiple hollow needles 31 are all provided on the needle holder 32. For example, in practical applications, the number of hollow needles 31 is between 1 and 200, and the number of hollow needles 31 may reach 200. With such a number, a guide hole needs to be provided on the needle holder 32 for each hollow needle 31 to facilitate the insertion of the hollow needle 31.

[0039] In this embodiment, a second linear drive 34 is also provided in the mounting cavity 11. The needle holder 32 can be connected to the second linear drive 34 for transmission. Under the drive of the second linear drive 34, the needle holder 32 can move toward or away from the skin to drive at least one hollow needle 31 disposed on the needle holder 32 to be inserted into the skin with different puncture depths to meet the injection needs of different skin layers. The first linear drive 22 and the second linear drive 34 can be configured as a motor, cylinder or other drive structure. The specific implementation can be set according to actual needs and is not limited here.

[0040] In one embodiment of this utility model, such as Figures 1 to 3 As shown, the infusion mechanism 2 also includes an infusion tube 25, with its two ends connected to the liquid storage component 23 and the liquid guiding chamber 33, respectively. The infusion mechanism 2 also includes an adjustment component located at the front end of the liquid storage component 23. The adjustment component is used to open / close the fluid channel between the first liquid storage chamber 234 or the second liquid storage chamber 235 and the liquid guiding chamber 33.

[0041] In this embodiment, the liquid storage component 23 is connected to the liquid guiding chamber 33 via the infusion tube 25. The infusion tube 25 provides a flexible connection between the adjustment component and the needle holder 32, preventing the infusion mechanism 2 from shaking and affecting the normal communication between the outlet chamber and the liquid guiding chamber 33. Simultaneously, when the second linear drive 34 drives the needle holder 32 to move the hollow needle 31, the distance between the liquid guiding chamber 33 and the liquid storage component 23 changes. The infusion tube 25 can be lengthened to meet the communication requirements between the liquid guiding chamber 33 and the liquid storage component 23, ensuring that they remain in a continuous communication state. The length of the infusion tube 25 can be set according to actual needs.

[0042] Understandably, when the injection device 100 is injecting, the regulating component connects the first reservoir 234 or the second reservoir 235 with the guide cavity 33, so that the liquid medication can enter the guide cavity 33 from the first reservoir 234 or the second reservoir 235, and then be injected into the skin through the hollow needle 31. When the injection device 100 pauses injection, the regulating component closes the flow channel between the first reservoir 234 or the second reservoir 235 and the guide cavity 33 to prevent the liquid medication from flowing out of the hollow needle 31.

[0043] In practical implementation, the infusion tubing 25 can be a flexible tubing. Flexible tubing has a certain degree of elasticity and bending ability, and can be bent within the mounting cavity 11 to better adapt to changes in the distance between the adjusting component and the needle seat 32. The adjusting component can be a solenoid valve; no specific limitation is made here.

[0044] In one embodiment of this utility model, such as Figures 2 to 4As shown, the regulating component includes a liquid outlet 24 and a one-way valve. The liquid outlet 24 is provided with a liquid outlet chamber and an inlet and an outlet that are connected to the liquid outlet chamber. The one-way valve is located at the liquid inlet. The liquid inlet is connected to the liquid storage component 23, and the liquid outlet is connected to the delivery pipe 25.

[0045] In this embodiment, the liquid outlet 24 is disposed between the liquid outlet assembly and the treatment head 3. The outlet of the liquid outlet 24 is connected to the liquid guiding cavity 33. When the drive member 21 moves the liquid storage assembly 23 until the outlet of the first liquid storage cavity 234 or the second liquid storage cavity 235 is aligned with the inlet of the liquid outlet 24 and connected to the inlet, the first liquid storage cavity 234 or the second liquid storage cavity 235 is connected to the liquid guiding cavity 33 through the liquid outlet cavity. At this time, the push member is positioned directly in front of the inlet of the first liquid storage cavity 234 or the second liquid storage cavity 235. The push member pushes the first plunger or the second plunger from the inlet of the liquid storage cavity towards the outlet, so that the liquid medicine in the first liquid storage cavity 234 or the second liquid storage cavity 235 flows into the liquid guiding cavity 33 through the liquid outlet cavity and enters the subcutaneous tissue through the hollow needle 31. A one-way valve is provided at the inlet of the liquid outlet component 24 so that the liquid outlet can only allow the liquid to flow into the liquid outlet chamber, but not out of the liquid outlet chamber. This is to prevent the liquid in the liquid outlet component 24 from backflowing and leaking into the mounting cavity 11 when the selector drive component 21 drives the liquid outlet assembly to move, which would cause the electronic components in the mounting cavity 11 to be corroded or short-circuited and damaged.

[0046] Understandably, the dispensing component 24 can be movably connected to the storage component 23 to ensure that the distance between the dispensing component 24 and the storage component 23 remains constant, while the dispensing component 24 remains stationary when the storage component 23 is moved by the drive component 21. The cross-sectional area of ​​the dispensing chamber gradually decreases from the end near the inlet to the end near the outlet, so that the liquid entering through the inlet converges towards the outlet. In actual implementation, the dispensing component 24 is cone-shaped, with the inlet located at the bottom of the cone and the outlet located at the apex, so that the dispensing chamber is funnel-shaped, thereby guiding the liquid entering through the inlet to the outlet. The infusion tube 25 can be connected to the outlet of the dispensing component 24 or the guiding chamber 33 via a threaded connector or a compression fitting.

[0047] In one embodiment, the liquid storage assembly 23 includes a turntable 231 and at least two liquid storage cylinders 232. The liquid storage cylinders 232 enclose a first liquid storage cavity 234 or a second liquid storage cavity 235 and an inlet and outlet connecting the first liquid storage cavity 234 or the second liquid storage cavity 235. The turntable 231 is connected to the output end of the selection drive member 21 and has at least two through holes, with each liquid storage cylinder 232 correspondingly passing through one through hole. The liquid outlet member 24 can be movably connected to the turntable 231 via a rotating shaft 233. The output end of the first linear drive member 22 can be provided with a push rod 221 to facilitate its extension into the liquid storage cavity.

[0048] Understandably, the inlet has a larger area and is set to correspond to the outlet of the liquid storage cylinder 232, while the outlet has a smaller area and is set to correspond to the inlet of the liquid guiding cavity 33, so as to facilitate the sealing treatment at the connection between the inlet and the outlet of the liquid storage cylinder 232, and at the connection between the liquid delivery pipe 25 and the outlet and the inlet of the liquid guiding cavity 33.

[0049] In one embodiment of this utility model, such as Figures 1 to 3 As shown, the injection device 100 also includes a controller disposed in the mounting cavity 11 and a user interface electrically connected to the controller. The user interface is configured to allow the user to select multiple depths to which the needle will be inserted and the type and dosage of the medication to be applied at each depth. The controller is electrically connected to the selection drive 21, the first linear drive 22, and the second linear drive 34, respectively. The controller is used to: respond to the multiple depths selected by the user and the type and dosage of the medication selected at each depth, and is configured to: control the second linear drive 34 to drive the hollow needle 31 to be inserted into the skin to multiple depths, and at each depth control the selection drive 21 to drive the movement of the reservoir assembly 23 to select the first reservoir cavity 234 or the second reservoir cavity 235 to be connected to the guide cavity 33; and control the first linear drive 22 to push the first plunger or the second plunger to move a preset length to output the first or second medication for the selected dose to the skin.

[0050] In one embodiment, the controller controls the second linear drive 34 to drive the hollow needle 31 to penetrate the skin to a first preset depth; based on the first preset depth, the controller controls the selection drive 21 to drive the movement of the liquid storage assembly 23 to select the first liquid storage chamber 234 to be connected to the liquid guiding chamber 33; the controller controls the first linear drive 22 to push the first plunger of the first liquid storage chamber 234 to move a preset length to output a preset dose of the first drug solution to the first preset depth of the skin.

[0051] The controller is also used to: when the injection at the first preset depth of the skin is completed, drive the hollow needle 31 from the first preset depth to the second preset depth of the skin via the second linear drive 34, wherein the second preset depth is different from the first preset depth; based on the second preset depth, control the selection drive 21 to drive the movement of the liquid reservoir assembly 23 to select the second liquid reservoir 235 to be connected to the liquid guiding cavity 33; control the first linear drive 22 to push the second plunger of the second liquid reservoir 235 to move a preset length to output a preset dose of the second drug solution to the second preset depth of the skin.

[0052] Understandably, the first preset depth and the second preset depth can be any depth beneath the epidermis of the skin being treated. Human skin, from the epidermis inwards, consists of the epidermis, dermis, fat layer, and fascia layer. The epidermis can be further divided into the basal layer, spinous layer, granular layer, stratum lucidum, and stratum corneum. In this embodiment, the first preset depth can be any depth among these layers. When the controller controls the second linear drive 34 to drive the hollow needle into the skin to the first preset depth, the controller controls the selection drive 21 to move the liquid storage assembly 23, so that the first liquid storage chamber 234 and the liquid guiding chamber 33 are connected. The first liquid pre-stored in the first liquid storage chamber 234 is a targeted liquid for the dermal layer at the first preset depth. Then, the controller controls the first linear drive 22 to push the first plunger in the first liquid storage chamber 234 to move a preset length, injecting a certain amount of the first liquid into that dermal layer.

[0053] After injection at the first preset depth, the controller, via the second linear drive 34, moves the hollow needle 31 from the first preset depth to the second preset depth. The controller then controls the selection drive 21 to move the liquid reservoir assembly 23, connecting the second liquid reservoir 235 to the liquid guiding cavity 33. The second medication pre-stored in the second liquid reservoir 235 is a targeted medication for the dermal layer at the second preset depth. Subsequently, the controller controls the first linear drive 22 to push the second plunger within the second liquid reservoir 235 a preset length, injecting a certain amount of the second medication into that dermal layer. This allows for automated, targeted injection of different medications into different dermal layers. The second preset depth can be any depth different from the first preset depth, including the basal layer, spinous layer, granular layer, stratum lucidum, and stratum corneum; no specific limitation is made here.

[0054] In actual implementation, after the second preset depth injection is completed, the controller can also control the second linear drive 34 to drive the needle seat 32 to move the hollow needle 31 to the third preset depth. Correspondingly, the liquid storage assembly 23 is equipped with a third liquid storage chamber 236. The controller controls the selection drive 21 to move the liquid storage assembly 23 so that the third liquid storage chamber 236 and the liquid guiding chamber 33 are aligned. The third drug solution pre-stored in the third liquid storage chamber 236 is a targeted drug solution for the skin layer at the third preset depth. Then, the controller controls the first linear drive 22 to push the third plunger in the third liquid storage chamber 236 to move a preset length, injecting a certain amount of the third drug solution into the skin layer. The third preset depth can be any depth in the basal layer, spinous layer, granular layer, stratum lucidum, and stratum corneum that is different from the first and second preset depths. Similarly, the insertion depth of the hollow needle 31 can also be added to a fourth preset depth, a fifth preset depth, etc. Correspondingly, the liquid storage assembly 23 can be equipped with a fourth liquid storage chamber, a fifth liquid storage chamber, etc., without specific limitations here.

[0055] Optionally, the controller has preset depths of one, two, three, four, and five, corresponding to the basal layer, spinous layer, granular layer, stratum lucidum, and stratum corneum, respectively. During injection treatment, the controller can control the second linear drive 34 to drive the needle seat 32 to move the hollow needle 31 from bottom to top sequentially to the first, second, third, fourth, and fifth preset depths; or, the controller can control the second linear drive 34 to drive the needle seat 32 to move the hollow needle 31 from top to bottom sequentially to the fifth, fourth, third, second, and first preset depths; or, the controller can control the second linear drive 34 to drive the needle seat 32 to move the hollow needle 31 to the first, second, third, fourth, and fifth preset depths randomly. The injection device 100 injects a targeted drug solution at each preset depth, and the dosage of the drug solution can be the same or different. During treatment, the treatment end of the hollow needle 31 does not need to be pulled out of the skin; it can be moved directly between various preset depths until the treatment at the last preset depth is completed.

[0056] In one embodiment of this utility model, such as Figure 1 As shown, when the controller drives the hollow needle 31 to penetrate the skin to multiple depths, it controls the hollow needle to perform at least one injection, outputting a first or second drug solution selected by the user to different depths of the skin. The injection method includes a continuous release method or a layered release method.

[0057] In one embodiment, during the process of moving from a first preset depth to a second preset depth of the skin, the hollow needle 31 is controlled to perform at least one injection, and the first and second drug solutions are selectively injected into the skin in a continuous injection or a layered non-continuous injection manner based on the selected dose.

[0058] In this embodiment, the continuous release method can be a method of continuously injecting the drug solution as the needle moves from the fascia layer to the fat layer and the dermis layer; the layered release method can be a method of injecting the drug solution at intervals in the fascia layer, fat layer and dermis layer respectively during the movement of the needle.

[0059] In actual implementation, the controller controls the second linear drive 34 to drive the needle holder 32 to move the hollow needle 31 to different preset depths, and controls the first linear drive 22 to push the injection for injection treatment through continuous release or layered release.

[0060] In one embodiment of this utility model, such as Figure 1 As shown, the injection device 100 also includes a negative pressure unit, which is located at the end of the treatment head 3 away from the housing 1 and is electrically connected to the controller. The negative pressure unit is used to adsorb the skin.

[0061] In this embodiment, to ensure the smoothness of the skin to be treated, the injection device 100 also includes a negative pressure unit. Before treating the skin, the negative pressure unit comes into contact with the skin, and the controller controls the operation of the negative pressure unit to adsorb the skin in the treatment area, adsorbing skin that is not in the same plane to the same plane. This ensures that the skin in the treatment area is in the same plane when the needle is inserted, thereby ensuring that when the controller controls the second linear drive 34 to drive the needle holder 32 to drive multiple hollow needles 31 to insert into the preset depth, each hollow needle 31 actually reaches the preset depth. This avoids the situation where the hollow needles 31 reach different depths due to insufficient skin smoothness, and fail to reach the preset depth, resulting in poor treatment effect.

[0062] In one embodiment of this utility model, such as Figure 1 As shown, the injection device 100 also includes a pressure sensor, which is located on the treatment surface of the treatment head 3 and electrically connected to the controller. The pressure sensor is used to detect whether the treatment head 3 is in close contact with the skin.

[0063] In this embodiment, before the injection device 100 performs treatment, a pressure sensor can detect whether the treatment surface of the injection device 100 is completely in contact with the skin, thereby ensuring the effectiveness of the subsequent injection treatment.

[0064] Multiple pressure sensors can be set, and these sensors can be arranged around the treatment surface of the injection device 100. By measuring the values ​​detected by the multiple pressure sensors, it can be determined whether the treatment surface is at the same level as the skin, so as to ensure that when the controller controls the second linear drive 34 to drive the needle holder 32 to drive the multiple hollow needles 31 to insert into the preset depth, each hollow needle 31 can reach the preset depth simultaneously.

[0065] In one embodiment of this utility model, such as Figure 1 As shown, the treatment head 3 also includes a radiofrequency microneedle 35, which is connected to the needle hub 32 and electrically connected to the controller. The radiofrequency microneedle 35 is used to release electrical energy.

[0066] In this embodiment, during skin injection treatment, radiofrequency microneedles 35 can also emit electrical energy for radiofrequency therapy. When the hollow needle 31 is inserted into the skin at different depths for injection treatment, the radiofrequency microneedles 35 can also be inserted simultaneously. The controller controls the release of electrical energy from the radiofrequency microneedles 35 to meet the treatment needs at different depths. The controller can also control the release of medium-frequency or low-frequency electrical energy from the radiofrequency microneedles 35 to heat subcutaneous tissue, promoting the diffusion and absorption of the medication under the skin to relieve the user's pain.

[0067] In actual implementation, the controller can control the radio frequency microneedle 35 to release electrical energy while the hollow needle 31 is being injected, or it can release electrical energy before or after the injection, without making any specific limitations here.

[0068] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An injection device for skin care and treatment, characterized in that The injection device comprises: a housing provided with a mounting cavity and a liquid delivery mechanism comprising a selection drive, a liquid storage assembly and a first linear drive; the liquid storage assembly is connected to an output end of the selection drive, the liquid storage assembly comprises at least one first liquid storage cavity for storing a first liquid and a first plunger reciprocally moving in the first liquid storage cavity, and at least one second liquid storage cavity for storing a second liquid and a second plunger reciprocally moving in the second liquid storage cavity; and a treatment head detachably connected to the housing and provided with a liquid guide cavity in communication with the liquid storage assembly, the treatment head comprises at least one hollow needle in communication with the liquid guide cavity; wherein the selection drive drives the liquid storage assembly to move relative to the housing so that at least one of the first liquid storage cavity or the second liquid storage cavity is selectively communicated with the liquid guide cavity, and the first linear drive drives the first plunger or the second plunger to move a preset length to make a preset dose of the first liquid or the second liquid selectively flow to the liquid guide cavity and be injected into the skin through the hollow needle.

2. The injection device of claim 1, wherein, The treatment head further comprises a needle seat, the liquid guide cavity is formed in the needle seat, and one end of the hollow needle is arranged in the needle seat and in communication with the liquid guide cavity; the injection device further comprises a second linear drive arranged in the mounting cavity, the needle seat is connected to an output end of the second linear drive, and the second linear drive is used to drive the needle seat to insert the hollow needle into the skin.

3. The injection device of claim 1, wherein, The liquid delivery mechanism further comprises a liquid delivery tube, two ends of the liquid delivery tube are respectively in communication with the liquid storage assembly and the liquid guide cavity; the liquid delivery mechanism further comprises an adjusting assembly arranged at a front end of the liquid storage assembly, the adjusting assembly is used to open / close a fluid passage between the first liquid storage cavity or the second liquid storage cavity and the liquid guide cavity.

4. The injection device of claim 3, wherein, The adjusting assembly comprises a liquid outlet member and a one-way valve, the liquid outlet member is provided with a liquid outlet cavity and a liquid inlet and a liquid outlet in communication with the liquid outlet cavity, the one-way valve is arranged at the liquid inlet, the liquid inlet is in communication with the liquid storage assembly, and the liquid outlet is in communication with the liquid delivery tube.

5. An injection device as claimed in any of claims 2 to 4 wherein, The injection device further comprises a controller arranged in the mounting cavity and a user interface electrically connected with the controller, the user interface is configured to allow a user to select a plurality of depths at which the needle is to be inserted and a kind of liquid and a dose to be applied at each depth.

6. The injection device of claim 5, wherein, The controller is electrically connected with the selection drive, the first linear drive and the second linear drive respectively, the controller is configured to control the second linear drive to drive the hollow needle to penetrate into the skin at the plurality of depths selected by the user and control the selection drive to drive the liquid storage assembly to move so as to select the first liquid storage cavity or the second liquid storage cavity to be communicated with the liquid guide cavity at each depth in response to the plurality of depths selected by the user and the kind of liquid and the dose selected by the user at each depth. The controller controls the first linear drive to push the first plunger or the second plunger to move a preset length to output the selected dose of the first liquid or the second liquid to the skin.

7. The injection device of claim 6, wherein, In the plurality of depths at which the hollow needle is driven to penetrate into the skin, the controller controls the hollow needle to perform at least one injection, and the manner in which the first drug solution or the second drug solution of a user-selected dose is output to the skin includes a sustained release manner or a layered release manner.

8. The injection device of claim 5, wherein, The injection device further comprises a negative pressure unit arranged at an end of the treatment head away from the shell and electrically connected to the controller, and the negative pressure unit is used for adsorbing the skin.

9. The injection device of claim 5, wherein, The injection device further comprises a pressure sensor arranged on a treatment surface of the treatment head and electrically connected to the controller, and the pressure sensor is used for detecting whether the treatment head is in close contact with the skin.

10. The injection device of claim 5, wherein, The treatment head further comprises a radio frequency micro-needle connected to the needle seat and electrically connected to the controller, and the radio frequency micro-needle is used for releasing electric energy.

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