Adapter and injection device

Abstract

The utility model discloses a switching seat and injection equipment relates to medical equipment technical field, wherein, the switching seat is used for connecting handle and injection head, the switching seat has negative pressure channel and the negative pressure pipe of the entrance of connecting the negative pressure channel, the negative pressure pipe is away from the negative pressure channel's entrance one end with injection head intercommunication, the outlet of negative pressure channel with handle intercommunication. The utility model provides technical scheme to let the same handle can adapt to the injection head of different size, improves the versatility of handle.

Description

Technical Field

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

[0002] The existing water-light injection products on the market consist of an injection head and a handle. The injection relies on the doctor to manually push the piston inside the syringe. The injection head only has multiple injection needles installed inside, and the negative pressure tube is external. The handle is only equipped with a syringe, which makes the injection head and handle on the market simple in structure and small in size.

[0003] Another type of handle with negative pressure function incorporates an automatic liquid dispensing mechanism and a negative pressure air tube, resulting in a handle size larger than the aforementioned externally mounted negative pressure tube injection head. This creates a structural and dimensional compatibility issue between the injection head and the handle. Because different models or applications of injection heads, such as those with internal or external negative pressure tubes, have different housing shapes and connection dimensions, a single handle often cannot accommodate multiple sizes of injection heads. This necessitates users equipping themselves with multiple dedicated handles, increasing operating costs and reducing operational flexibility and convenience. Utility Model Content

[0004] The main purpose of this invention is to provide an adapter and injection device that allows the same handle to be adapted to injection heads of different sizes, thereby improving the versatility of the handle.

[0005] To achieve the above objectives, this utility model proposes an adapter for connecting a handle and an injection head. The adapter has a negative pressure channel and a negative pressure tube connecting to the inlet of the negative pressure channel. The end of the negative pressure tube away from the inlet of the negative pressure channel is used to communicate with the injection head. The outlet of the negative pressure channel is used to communicate with the handle.

[0006] In one embodiment, the adapter has a groove on one end face near the inlet of the negative pressure channel, and the connecting tube protrudes from the bottom wall of the groove. The two ends of the negative pressure tube are respectively connected to the connecting tube and the injection head.

[0007] In one embodiment, the adapter includes a first housing and a second housing connected to the first housing. A baffle is protruding on the inner surface of the first housing. The baffle surrounds the periphery of the first housing, and the baffle, the inner surface of the first housing, and the inner surface of the second housing together form the negative pressure channel. The inlet of the negative pressure channel is located in the first housing, and the outlet of the negative pressure channel is located in the second housing.

[0008] In one embodiment, the baffle includes a first baffle and a second baffle. The first baffle and the inner surfaces of the first and second housings respectively enclose a first channel and a second channel. The second baffle and the inner surfaces of the first and second housings respectively enclose a liquid storage cavity. The two ends of the liquid storage cavity are respectively connected to the first channel and the second channel to form the negative pressure channel. The liquid storage cavity is used to buffer the fluid adsorbed by the negative pressure. The inlet of the negative pressure channel is located at the first channel, and the outlet of the negative pressure channel is located at the second channel.

[0009] The inner surface of the second housing is provided with a boss, which is arranged around the outlet of the negative pressure channel to block the fluid flowing back from the outlet of the negative pressure channel.

[0010] In one embodiment, the bottom inner surface of the second housing is provided with a snap-fit ​​protrusion, which surrounds the periphery of the second housing; the first housing has an installation opening, the end face of which is provided with a slot, and the snap-fit ​​protrusion is welded to or bonded to the slot.

[0011] In one embodiment, a filter is installed in the negative pressure channel, the filter being used to filter impurities adsorbed by the negative pressure;

[0012] The filter includes:

[0013] Filter cotton, said filter cotton being installed within the negative pressure channel; and / or

[0014] An oleophobic membrane, wherein the oleophobic membrane is connected to one side surface of the filter cotton and is disposed opposite to the inlet of the negative pressure channel; and / or

[0015] A hydrophobic membrane is connected to the other side surface of the filter cotton and is positioned opposite to the outlet of the negative pressure channel.

[0016] This utility model also proposes an injection device, the injection device comprising:

[0017] A handle, wherein a negative pressure air passage is provided inside the handle and a negative pressure connector is provided at the end of the negative pressure air passage;

[0018] An injection head, wherein the end face of the injection head facing the skin has a negative pressure chamber and a negative pressure port communicating with the negative pressure chamber; and

[0019] As described above, in the adapter, the handle and the injection head are detachably connected to the adapter, and the negative pressure connector and the negative pressure hole are detachably connected to the negative pressure channel and the negative pressure tube of the adapter.

[0020] In one embodiment, one end of the handle is provided with at least two clamping buckles, the two clamping buckles are located on both sides of the handle, and are used to clamp the adapter; each clamping buckle is connected to a button, the button is used for the user to press to control the opening and closing of the clamping buckle.

[0021] In one embodiment, the adapter has a plug-in protrusion on one end face facing the handle;

[0022] The handle has a insertion groove on one end face facing the adapter, and the insertion protrusion is inserted into the insertion groove;

[0023] The plug protrusion is provided with a foolproof part, the groove wall of the plug groove is provided with a foolproof groove, and the foolproof part is placed in the foolproof groove.

[0024] In one embodiment, the outer circumferential surface of the adapter is recessed with a mounting groove, and the inner bottom surface of the mounting groove is provided with at least two limiting protrusions, which are located on both sides of the mounting groove; the injection head is installed in the mounting groove and is limited by the two limiting protrusions.

[0025] This invention provides a replaceable adapter between the handle and existing externally mounted negative pressure injection heads. This allows the same handle to flexibly adapt to injection heads with different housing structures. Because the handle contains an automatic liquid-pushing mechanism and a negative pressure air tube, its size is larger than that of externally mounted negative pressure injection heads. The replaceable adapter solves the structural and dimensional compatibility issues between various injection heads and the handle, significantly improving the handle's versatility and application range. The adapter has a negative pressure channel inside, with its outlet connected to the handle and its inlet connected to the injection head via a negative pressure tube. By replacing or cleaning the adapter, reliable connections between different injection heads and the same handle can be achieved, greatly enhancing the device's adaptability and ease of use while ensuring the integrity of the negative pressure function. Attached Figure Description

[0026] 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.

[0027] Figure 1 A cross-sectional view of the injection device provided by this utility model;

[0028] Figure 2 A schematic diagram of the structure of the injection device provided by this utility model;

[0029] Figure 3 A schematic diagram of the structure of the injection device provided by this utility model after the injection head is disassembled;

[0030] Figure 4 An exploded view of the structure of the injection device provided by this utility model after the injection head has been disassembled;

[0031] Figure 5 Exploded view of the structure of the adapter for the injection device provided by this utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the first housing of the adapter for the injection device provided by this utility model;

[0033] Figure 7 This utility model provides a schematic diagram of the structure of the first housing of the adapter for the injection device, in which a filter is installed;

[0034] Figure 8 A schematic diagram of the structure of the adapter for the injection device provided by this utility model;

[0035] Figure 9 A cross-sectional view of the adapter for the injection device provided by this utility model.

[0036] Explanation of icon numbers:

[0037] 10. Handle; 11. Negative pressure connector; 12. Clamping buckle; 13. Button; 10a. Injection channel; 10b. Insertion groove; 20. Injection head; 20a. Negative pressure port; 30. Adapter; 30a. Negative pressure channel; 300a. Inlet; 300b. Outlet; 301a. First channel; 301b. Second channel; 303a. Liquid reservoir; 30b. Negative pressure tube; 30c. Connecting tube; 30d. Insertion protrusion 30e, Anti-mistake part; 30f, Mounting groove; 30g, Limiting protrusion; 31, First housing; 311, Retaining rib; 311a, First retaining rib; 311b, Second retaining rib; 31a, Snap-in groove; 32, Second housing; 32a, Boss; 32b, Snap-in protrusion; 40, Filter; 41, Filter cotton; 42, Oleophobic film; 43, Hydrophobic film; 50, Injection assembly; 51, Injection syringe; 52, Linear drive component.

[0038] 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

[0039] 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.

[0040] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0041] 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.

[0042] In existing technologies, the handle and injection head of injection equipment are usually designed to be a fixed match, with one type of handle often only suitable for injection heads of a specific structure or size. Since different injection tasks require different specifications of injection heads, operators have to equip themselves with multiple dedicated handles, which not only increases equipment costs but also limits operational flexibility and equipment versatility.

[0043] Therefore, please refer to Figures 1 to 4 and Figure 9 This application proposes an adapter 30 for connecting a handle 10 and an injection head 20. The adapter 30 is provided with a negative pressure channel 30a and a negative pressure tube 30b connecting to the inlet 300a of the channel. The end of the negative pressure tube 30b away from the inlet 300a is connected to the injection head 20, and the outlet 300b of the negative pressure channel 30a is connected to the handle 10. This structure replaces external tubing with a built-in conduction path, realizing the internal integration of the negative pressure system.

[0044] In this embodiment, the adapter 30 refers to the fitting component that connects the injection head 20 to the handle 10. It is detachably connected to the handle 10 and facilitates cleaning or replacement. The adapter 30 is structurally convenient for installing the injection head 20 and delivers the negative pressure generated by the negative pressure source within the handle 10 to the injection head 20. The adapter 30 also has a negative pressure channel 30a, which is a continuous cavity within the adapter 30, formed by baffles 311, used to establish an airflow path between the handle 10 and the injection head 20. The negative pressure tube 30b is a tubular structure connecting the channel inlet 300a to the injection head 20. It can be a silicone flexible tube or a rigid plastic tube, and its function is to guide the negative pressure generated by the injection head 20 to the internal channel of the adapter 30. Inlet 300a and outlet 300b refer to the airflow interfaces at both ends of the negative pressure channel 30a. Inlet 300a can be set at the connection end between the adapter 30 and the injection head 20, and outlet 300b is set at the connection end with the handle 10, forming a directional airflow path.

[0045] Specifically, the adapter 30 serves as an intermediate connecting component. Its internal negative pressure channel 30a connects to the negative pressure port 20a of the injection head 20 via an inlet 300a and to the negative pressure air path of the handle 10 via an outlet 300b. The negative pressure generated by the injection head 20 is conducted through the negative pressure tube 30b to the inlet 300a of the negative pressure channel 30a in the adapter 30, flows along the negative pressure channel 30a to the outlet 300b, and enters the negative pressure system of the handle 10. This design replaces the originally exposed pipelines with built-in channels, and the injection head 20 and the handle 10 form an integrated structure through the adapter 30, eliminating the need to handle external pipelines during operation.

[0046] Compared with existing technologies, this application, by setting an adapter 30 between the injection head 20 and the handle 10, enables the same handle to be adapted to multiple injection heads by replacing the adapter 30, significantly improving the versatility and range of applications of the handle. At the same time, the built-in negative pressure channel 30a also enhances the device's anti-contamination capability and operational reliability.

[0047] Please see Figure 1 and Figure 8 This application further proposes that the adapter 30 has a groove on one end face near the inlet 300a of the negative pressure channel 30a, and a connecting pipe 30c protrudes from the bottom wall of the groove. The two ends of the negative pressure pipe 30b are respectively connected to the connecting pipe 30c and the injection head 20.

[0048] In this embodiment, the groove refers to a recessed structure on the end face of the adapter 30, which can be implemented using a rectangular or circular cross-section groove, used to accommodate the connecting tube 30c and restrict its position. The connecting tube 30c refers to a tubular structure extending from the bottom of the groove, which can be made of metal or plastic, used to fix the negative pressure tube 30b and establish a sealed connection. The negative pressure tube 30b refers to a flexible or rigid pipe, which can be made of silicone or polyurethane, used to transmit negative pressure between the injection head 20 and the negative pressure channel 30a.

[0049] Specifically, a groove is formed on the end face of the adapter 30 near the inlet 300a of the negative pressure channel 30a. The bottom wall of the groove protrudes upward to form a connecting tube 30c. The connecting tube 30c and the groove together constitute the mounting base for the negative pressure tube 30b. One end of the negative pressure tube 30b is sleeved on the outer wall of the connecting tube 30c, and the other end extends into the inside of the injection head 20. The groove limits the connection of the connecting tube 30c, ensuring that the negative pressure tube 30b remains axially aligned during connection and avoiding sealing failure due to misalignment. The depth and width of the groove can be adjusted according to the size of the connecting tube 30c. For example, the groove depth can be slightly greater than the height of the connecting tube 30c to provide assembly allowance. A gap is formed between the groove wall and the side wall of the connecting tube 30c to facilitate adaptive adjustment of the position when the negative pressure tube 30b is inserted.

[0050] This solution ensures a stable and sealed connection between the negative pressure pipe 30b and the adapter 30 by using the groove and the connecting pipe 30c. At the same time, it reduces the space occupied by external pipes and improves the overall integrity of the equipment and the smoothness of operation.

[0051] Please see Figures 5 to 8 This application further proposes that the adapter 30 includes a first housing 31 and a second housing 32 connected to the first housing 31. The inner surface of the first housing 31 is provided with a baffle 311, which surrounds the periphery of the first housing 31. The baffle 311, the inner surface of the first housing 31 and the inner surface of the second housing 32 form a negative pressure channel 30a. The inlet 300a of the negative pressure channel 30a is located in the first housing 31 and the outlet 300b of the negative pressure channel 30a is located in the second housing 32.

[0052] In this embodiment, the baffle 311 refers to a protruding structure extending circumferentially along the inner surface of the first housing 31, which can be formed by injection molding or machining, and is used to cooperate with the housing to form a closed fluid channel. The first housing 31 and the second housing 32 are separate structures that can be combined by a detachable or fixed connection, which can be connected by snap-fit, welding or bonding, to facilitate the processing and assembly of the internal channels. The inlet 300a and outlet 300b of the negative pressure channel 30a are located in different housings, which can be achieved by setting through holes in the separate housings, so that the fluid path forms a continuous channel at the housing joint.

[0053] Specifically, the first housing 31 and the second housing 32 are connected by their edges to form a sealed space. The baffle 311 extends circumferentially along the inner wall of the first housing 31 and forms an annular sealing structure after contacting the inner wall of the second housing 32. An inlet 300a is provided at the end of the first housing 31, and an outlet 300b is provided at the end of the second housing 32. Fluid enters the annular channel formed by the baffle 311 and the housing from the inlet 300a, and is guided to exit from the outlet 300b. The split housing structure allows the baffle 311 to be centrally formed on a single housing, reducing processing difficulty, while achieving a complete seal of the channel through housing mating.

[0054] This solution integrates the negative pressure channel 30a into a split housing, allowing the fluid path to be completely embedded within the adapter 30. Traditional one-piece housings are difficult to manufacture for complex flow channels; this solution utilizes the combination of baffles 311 and a split housing to achieve both channel sealing and simplified manufacturing processes. Furthermore, the surrounding design of the baffles 311 provides a stronger seal than traditional straight baffles, preventing fluid leakage to the housing mating surface.

[0055] Please see Figures 5 to 8 This application further proposes that the adapter 30 includes a first housing 31 and a second housing 32 connected to the first housing 31. A baffle 311 is protruding from the inner surface of the first housing 31, surrounding the periphery of the first housing 31. The baffle 311, the inner surface of the first housing 31, and the inner surface of the second housing 32 together form a negative pressure channel 30a. The inlet 300a of the negative pressure channel 30a is located in the first housing 31, and the outlet 300b of the negative pressure channel 30a is located in the second housing 32. The baffle 311 includes a first baffle 311a and a second baffle 311b. The first baffle 311a, the inner surface of the first housing 31, and the inner surface of the second housing 32 respectively form a first channel 301a and a second channel 301b. The second baffle 311b, together with the inner surface of the first housing 31 and the inner surface of the second housing 32, forms a liquid storage cavity 303a. The two ends of the liquid storage cavity 303a are respectively connected to the first channel 301a and the second channel 301b to form a negative pressure channel 30a. The liquid storage cavity 303a is used to buffer the fluid adsorbed by negative pressure. The inlet 300a of the negative pressure channel 30a is located at the first channel 301a, and the outlet 300b of the negative pressure channel 30a is located at the second channel 301b. The inner surface of the second housing 32 is provided with a boss 32a, which surrounds the outlet 300b of the negative pressure channel 30a, or the outlet 300b is directly opened on the boss 32a, to block the fluid flowing back from the outlet 300b of the negative pressure channel 30a.

[0056] In this embodiment, the baffle 311 refers to a protruding structure disposed on the inner surface of the first housing 31, which can be integrally formed with the housing using injection molding, and is used to separate and form different functional channels. The liquid storage cavity 303a refers to a cavity structure formed by the second baffle 311b and the housing, and the cavity volume can be controlled by adjusting the height of the baffle 311, used for temporary storage of liquid carried during negative pressure adsorption. The boss 32a refers to an annular protrusion disposed on the inner surface of the second housing 32, which can be designed as a stepped structure, with a height greater than the climbing height under the action of fluid surface tension, used to physically block the reverse flow of fluid.

[0057] Specifically, when the negative pressure system is activated, the fluid sequentially enters the storage chamber 303a through the first channel 301a for temporary storage, and then flows to the outlet 300b through the second channel 301b. The buffering function of the storage chamber 303a prevents liquid from directly entering the handle 10. The boss 32a forms a barrier around the outlet 300b, preventing liquid from flowing back along the channel wall when the negative pressure fluctuates or the operation is tilted. The meandering channel formed by the first baffle 311a and the second baffle 311b extends the fluid path, and together with the volume buffer of the storage chamber 303a, gas-liquid separation is achieved.

[0058] Compared to existing technologies, current negative pressure systems lack a fluid storage structure, allowing liquid to easily enter the handle directly with the airflow, leading to component contamination. This solution actively traps liquid in the negative pressure airflow through the reservoir 303a, combined with the anti-backflow design of the boss 32a, forming a dual protection mechanism. This effectively prevents adsorbed skin tissue fluid or residual medication from entering the handle 10 during treatment, avoiding performance degradation of precision airflow components due to liquid erosion. The buffering function of the reservoir 303a reduces the risk of liquid being directly drawn into the handle 10 by negative pressure, while the physical barrier properties of the boss 32a ensure that the airflow remains dry even when the device is tilted or negative pressure is paused, improving operational stability and lifespan.

[0059] Please see Figures 5 to 8 This application further proposes that the adapter 30 includes a first housing 31 and a second housing 32 connected to the first housing 31. The bottom inner surface of the second housing 32 is provided with a snap-fit ​​protrusion 32b, which surrounds the periphery of the second housing 32. The first housing 31 has an installation opening, and the end face of the installation opening is provided with a slot 31a. The snap-fit ​​protrusion 32b is welded or bonded to the slot 31a.

[0060] In this embodiment, the snap-fit ​​protrusion 32b refers to a protruding structure that extends continuously along the inner edge of the bottom of the second housing 32. It can be integrally formed using injection molding and is used to mechanically interlock with the snap-fit ​​groove 31a of the first housing 31. The snap-fit ​​groove 31a refers to a recessed structure formed at the edge of the mounting opening in the first housing 31. It can be formed by milling and its shape matches the snap-fit ​​protrusion 32b for positioning. Welding or bonding refers to fixing the snap-fit ​​protrusion 32b to the snap-fit ​​groove 31a using hot melt or adhesive. This can be achieved using ultrasonic welding or epoxy resin adhesive to eliminate assembly gaps and enhance sealing.

[0061] Specifically, when assembling the first housing 31 and the second housing 32, the snap-fit ​​protrusion 32b is embedded in the snap-fit ​​groove 31a to form a preliminary position, and then the two are joined together by welding or bonding. Welding allows the contact surface material to melt and solidify, forming a non-removable connection; bonding uses an adhesive layer to fill the gaps for fixation. This connection method creates a closed negative pressure channel 30a between the first housing 31 and the second housing 32, preventing gas leakage. The depth of the snap-fit ​​groove 31a can be slightly greater than the height of the snap-fit ​​protrusion 32b to allow space for welding or bonding.

[0062] This solution uses the circumferential design of the snap-fit ​​protrusion 32b and the slot 31a to make the force distribution between the first housing 31 and the second housing 32 more uniform and form a tighter connection.

[0063] Please see Figures 5 to 7 This application further proposes an adapter 30, in which a filter 40 is installed within a negative pressure channel 30a. The filter 40 is used to filter impurities carried in the airflow. The filter 40 includes a filter cotton 41 installed within the negative pressure channel 30a; and / or an oleophobic membrane 42 connected to one side surface of the filter cotton 41 and disposed opposite to the inlet 300a of the negative pressure channel 30a; and / or a hydrophobic membrane 43 connected to the other side surface of the filter cotton 41 and disposed opposite to the outlet 300b of the negative pressure channel 30a.

[0064] In this embodiment, filter cotton 41 refers to a porous structure made of fibrous material, specifically polyester fiber or glass fiber, used to intercept solid particles or tissue debris carried during negative pressure adsorption. Oleophobic membrane 42 refers to a thin film with oleophobic properties, specifically a membrane layer coated with polytetrafluoroethylene, used to prevent oily substances from entering the negative pressure channel 30a. Hydrophobic membrane 43 refers to a thin film with hydrophobic properties, specifically a membrane layer coated with polypropylene, used to prevent liquid backflow into the downstream of the negative pressure channel 30a.

[0065] Specifically, a filter cotton 41 is installed within the negative pressure channel 30a as a basic filter layer, which can be used independently or in combination with other membrane layers. When the oleophobic membrane 42 is connected to the inlet 300a side of the filter cotton 41, it preferentially blocks oily impurities; when the hydrophobic membrane 43 is connected to the outlet 300b side of the filter cotton 41, it preferentially blocks liquid backflow. The filter cotton 41, oleophobic membrane 42, and hydrophobic membrane 43 can be installed individually or in combination to form a multi-layered filtration barrier. The negative pressure airflow passes sequentially through the oleophobic membrane 42, the filter cotton 41, and the hydrophobic membrane 43, and impurities are trapped in the filtration structure step by step, preventing them from entering the handle 10 or the injection head 20.

[0066] Compared to existing technologies, current negative pressure systems either lack filters or employ only a single filtration structure, leading to easy clogging of pipes or contamination of the equipment's interior by impurities. This solution utilizes a combined filtration structure to achieve multi-stage filtration within a limited space, simultaneously addressing the issues of solid particles, grease, and liquid backflow, without requiring additional external components.

[0067] Through the above technical solution, this application can effectively extend the service life of the handle 10 and the injection head 20, reduce negative pressure attenuation or equipment failure caused by impurity accumulation, reduce maintenance frequency, and ensure the stability and reliability of negative pressure adsorption during injection operation.

[0068] Please see Figure 1 and Figure 2 This application further proposes an injection device, including a handle 10, an injection head 20, and an adapter 30. The handle 10 has a negative pressure air path, and the end of the negative pressure air path is provided with a negative pressure connector 11. The injection head 20 has a negative pressure chamber and a negative pressure hole 20a communicating with the skin on its skin-facing end face. The adapter 30 is used to connect the handle 10 and the injection head 20. The handle 10 and the injection head 20 are detachably connected to the adapter 30, and the negative pressure connector 11 and the negative pressure hole 20a are detachably connected to the negative pressure channel 30a and the negative pressure tube 30b of the adapter 30, respectively.

[0069] In this embodiment, the negative pressure air path refers to the pipe structure inside the handle 10 for conducting negative pressure gas. Specifically, this can be achieved by reserving a cavity channel during injection molding. This structure avoids interference from external pipes on grip. The negative pressure connector 11 refers to the connecting component located at the end of the negative pressure air path of the handle 10. Specifically, it can be implemented using a quick-connect connector with a sealing ring to ensure a tight seal with the adapter 30. The detachable connection means that the handle 10 and the adapter 30 use a snap-fit ​​or plug-in structure, for example, using the cooperation of an elastic snap and a groove to achieve quick assembly and disassembly, facilitating equipment maintenance and component replacement.

[0070] Specifically, the negative pressure air path inside the handle 10 connects to the negative pressure channel 30a of the adapter 30 via the negative pressure connector 11, and the negative pressure port 20a of the injection head 20 is connected to the adapter 30 via the negative pressure tube 30b. When the device is working, the suction force generated by the negative pressure air path is transmitted sequentially to the injection head 20 through the negative pressure tube 30b of the adapter 30, forming a complete closed negative pressure system. The handle 10 and the adapter 30 adopt a detachable connection structure, such as quick locking via a press-type buckle, and the injection head 20 is fixed in the mounting groove 30f of the adapter 30 by a limiting protrusion 30g. This modular design allows the handle 10, injection head 20, and adapter 30 to be independently disassembled and assembled, improving the convenience of device maintenance while ensuring air path connectivity.

[0071] This solution, through its detachable connection structure between the handle 10 and the adapter 30, allows for the individual replacement of damaged parts without the need for complete equipment scrapping, compared to traditional fixed assembly methods. The adapter 30, acting as an intermediate connector, connects the negative pressure channel of the handle 10 to the negative pressure air path of the injection head 20. The negative pressure channel of the handle 10 is connected to a vacuum pump located outside the handle 10. The hollow microneedle inside the injection head 20 connects to the liquid path of the injection cylinder inside the handle 10. The injection cylinder contains a reciprocating piston, and a linear actuator dynamically drives the piston to move forward a certain distance or speed within the injection cylinder, ultimately changing the liquid injection volume and injection rate of the injection head 20. This allows the same handle 10 to be adapted to connect injection heads 20 of different sizes.

[0072] Please see Figures 1 to 4 This application further proposes an injection device including a handle 10 and an injection head 20. One end of the handle 10 is provided with at least two clamping buckles 12, which are located on both sides of the handle 10 and are used to clamp the adapter 30. Each clamping buckle 12 is connected to a button 13, which is used by the user to press to control the opening and closing of the clamping buckle 12.

[0073] In this embodiment, the clamping buckle 12 refers to the elastically deformable structure disposed on both sides of the handle 10. Specifically, it can be made of plastic or metal material with spring-like properties. By pressing the button 13 inward, the buckle is triggered to deform, thereby realizing the function of clamping or releasing the adapter 30. The button 13 refers to the operating component linked with the clamping buckle 12. Specifically, it can adopt a sliding or pressing structure. For example, a spring or slide rail mechanism is set inside the button 13, which drives the displacement of the clamping buckle 12 when the user applies external force.

[0074] Specifically, the clamping latches 12 on both sides of the handle 10 generate clamping force through elastic deformation. When the adapter 30 is placed between the handle 10 and the injection head 20, the clamping latches 12 retract inward and engage with the corresponding structure of the adapter 30. The button 13 is mechanically connected to the clamping latches 12. Pressing the button 13 causes the clamping latches 12 to expand outward, thereby releasing the fixation on the adapter 30. This enables quick installation and removal between the adapter 30 and the handle 10.

[0075] This solution integrates the adapter 30 directly into the handle 10 by linking the clamping buckles 12 on both sides of the handle 10 with the button 13, eliminating the occupation of the grip space by the exposed air tube. At the same time, the clamping mechanism controlled by the button 13 simplifies the disassembly and assembly steps, ensuring the precise docking of the injection head 20 and the handle 10.

[0076] Please see Figures 1 to 4 This utility model also proposes an injection device, which includes a handle 10, an injection head 20, and an adapter 30. The adapter 30 has an insertion protrusion 30d on one end face facing the handle 10; the handle 10 has an insertion groove 10b on one end face facing the adapter 30, and the insertion protrusion 30d is inserted into the insertion groove 10b; the insertion protrusion 30d has a foolproof part 30e, and the groove wall of the insertion groove 10b has a foolproof groove, with the foolproof part 30e placed in the foolproof groove. The specific structure of the adapter 30 is as described in the above embodiments. Since this injection device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0077] In this embodiment, the insertion protrusion 30d refers to a protruding structure extending from the end face of the adapter 30, specifically implemented as a cylindrical or rectangular boss 32a, used to form a physical connection with the insertion groove 10b of the handle 10. The insertion groove 10b refers to a groove formed on the end face of the handle 10, specifically implemented as a through groove or blind hole matching the shape of the insertion protrusion 30d, used to accommodate the insertion protrusion 30d for quick positioning. The misalignment prevention part 30e refers to an asymmetrical structure provided on the insertion protrusion 30d, specifically implemented as a ridge, groove, or bevel, used to restrict the insertion direction to prevent incorrect assembly. The misalignment prevention groove refers to a recess or protrusion provided on the inner wall of the insertion groove 10b that matches the misalignment prevention part 30e, specifically implemented as a geometry complementary to the misalignment prevention part 30e, used to ensure that the insertion protrusion 30d can only be inserted in a preset direction.

[0078] Specifically, when the adapter 30 is connected to the handle 10, the insertion protrusion 30d inserts into the insertion slot 10b, and the cooperation between the foolproof part 30e and the foolproof slot ensures that the two can only be assembled at a specific angle. For example, if the foolproof part 30e is a single-sided protrusion, then the insertion slot 10b will only have a corresponding groove on one side. If the assembly direction is incorrect, the protrusion will not be able to fit into the groove, thus forcing the operator to adjust the direction. This structure eliminates the possibility of multi-directional insertion through physical limitation.

[0079] The handle 10 also houses an injection assembly 50, which includes an injection syringe 51 and a linear drive 52. Both the syringe 51 and the linear drive 52 are installed within the injection channel 10a. The linear drive 52 is connected to the piston of the syringe 51 and drives the piston to move within the syringe 51. The injection head 20 also has an injection port, which is not connected to the negative pressure port 20a. The injection port is used to inject cosmetic fluid into the skin when the hollow microneedle is extended and to stop injecting cosmetic fluid when the injection head is retracted. The outlet 300b of the syringe 51 is connected to the injection port of the injection head 20. The handle 10 is also equipped with an encoder, which is electrically connected to the linear drive 52. The operator can control the linear drive 52 through the encoder, so that the linear drive 52 can push the piston of the syringe 51 to move, thereby realizing the automatic injection function of the injection device.

[0080] In some specific embodiments, the anti-mistake part 30e can be designed as a trapezoidal protrusion, and the anti-mistake groove is a corresponding trapezoidal groove; an elastic sealing ring can be provided between the insertion protrusion 30d and the insertion groove 10b to enhance the airtightness of the connection.

[0081] This solution integrates the connecting components between the handle 10 and the adapter 30 via a plug-in structure, significantly reducing external protrusions. At the same time, the foolproof design avoids repeated adjustments caused by incorrect orientation in traditional connections, shortening assembly time.

[0082] Please see Figures 1 to 4 This application further proposes an injection device in which a mounting groove 30f is recessed on the circumferential outer surface of an adapter 30, and at least two limiting protrusions 30g are provided on the bottom inner surface of the mounting groove 30f, with the two limiting protrusions 30g located on both sides of the mounting groove 30f; the injection head 20 is mounted in the mounting groove 30f and is defined by the two limiting protrusions 30g. In some specific embodiments, the distance or tilt angle of the two limiting protrusions 30g is adjustable or made of an elastically deformable material to better accommodate injection heads 20 of different sizes.

[0083] In this embodiment, the mounting groove 30f refers to a groove-shaped structure recessed into the outer surface of the adapter 30, which can be implemented by stamping or injection molding processes, and is used to provide a space for the injection head 20. The limiting protrusion 30g refers to a protruding structure extending upward from the bottom wall of the mounting groove 30f, which can be implemented by a protrusion integrally formed with the adapter 30 or a welded limiting block, and is used to limit the lateral displacement of the injection head 20 within the mounting groove 30f.

[0084] Specifically, when the injection head 20 needs to be connected to the adapter 30, the injection head 20 is embedded inside the mounting groove 30f. The limiting protrusions 30g on both sides of the mounting groove 30f abut against the outer wall of the injection head 20, forming a lateral constraint. Thus, the position of the injection head 20 within the mounting groove 30f is fixed, preventing displacement or loosening due to external forces. Furthermore, the depth fit between the limiting protrusions 30g and the mounting groove 30f restricts the longitudinal displacement of the injection head 20, ensuring stable communication between the injection head 20 and the adapter 30 via the negative pressure channel 30a.

[0085] Compared to existing technologies, where the injection head is typically fixed via an external snap-fit ​​or threaded connection, resulting in protruding structures on the outside of the device that affect the grip and easily accumulate contaminants, this solution addresses this issue. The mounting groove 30f recessed on the outer surface of the adapter 30 engages with the corresponding limiting protrusions 30g located on opposite sides of the bottom of the mounting groove 30f. This allows the injection head 20 to embed into the mounting groove 30f of the adapter 30, reducing external protrusions and achieving stable fixation through multiple limiting protrusions. Furthermore, the injection head 20 can be easily removed from the mounting groove 30f, with the two limiting protrusions 30g abutting against both sides of the injection head 20.

[0086] 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 adapter, characterized in that, The adapter is used to connect the handle and the injection head. The adapter has a negative pressure channel and a negative pressure tube connected to the inlet of the negative pressure channel. The end of the negative pressure tube away from the inlet of the negative pressure channel is used to communicate with the injection head. The outlet of the negative pressure channel is used to communicate with the handle.

2. The adapter as described in claim 1, characterized in that, The adapter has a groove on one end face near the inlet of the negative pressure channel. A connecting pipe protrudes from the bottom wall of the groove, and the two ends of the negative pressure pipe are respectively connected to the connecting pipe and the injection head.

3. The adapter as described in claim 1 or 2, characterized in that, The adapter includes a first housing and a second housing connected to the first housing. A baffle is protruding on the inner surface of the first housing. The baffle surrounds the periphery of the first housing. The baffle, the inner surface of the first housing, and the inner surface of the second housing together form the negative pressure channel. The inlet of the negative pressure channel is located in the first housing, and the outlet of the negative pressure channel is located in the second housing.

4. The adapter as described in claim 3, characterized in that, The baffle includes a first baffle and a second baffle. The first baffle and the inner surfaces of the first and second shells respectively enclose a first channel and a second channel. The second baffle and the inner surfaces of the first and second shells respectively enclose a liquid storage cavity. The two ends of the liquid storage cavity are respectively connected to the first channel and the second channel to form the negative pressure channel. The liquid storage cavity is used to buffer the fluid adsorbed by negative pressure. The inlet of the negative pressure channel is located at the first channel, and the outlet of the negative pressure channel is located at the second channel. The inner surface of the second housing is provided with a boss, which is arranged around the outlet of the negative pressure channel to block the fluid flowing back from the outlet of the negative pressure channel.

5. The adapter as described in claim 3, characterized in that, The bottom inner surface of the second housing is provided with a snap-fit ​​protrusion, which surrounds the periphery of the second housing; the first housing has an installation opening, and the end face of the installation opening is provided with a slot, and the snap-fit ​​protrusion is welded to or bonded to the slot.

6. The adapter as described in claim 1 or 2, characterized in that, A filter is installed inside the negative pressure channel, and the filter is used to filter out impurities adsorbed by the negative pressure. The filter includes: Filter cotton, said filter cotton being installed within the negative pressure channel; and / or An oleophobic membrane, wherein the oleophobic membrane is connected to one side surface of the filter cotton and is disposed opposite to the inlet of the negative pressure channel; and / or A hydrophobic membrane is connected to the other side surface of the filter cotton and is positioned opposite to the outlet of the negative pressure channel.

7. An injection device, characterized in that, The injection device includes: A handle, wherein a negative pressure air passage is provided inside the handle and a negative pressure connector is provided at the end of the negative pressure air passage; An injection head, wherein the end face of the injection head facing the skin has a negative pressure chamber and a negative pressure port communicating with the negative pressure chamber; and According to any one of claims 1 to 6, the handle and the injection head are detachably connected to the adapter, and the negative pressure connector and the negative pressure hole are detachably connected to the negative pressure channel and the negative pressure tube of the adapter.

8. The injection device as described in claim 7, characterized in that, At least two clamping buckles are provided at one end of the handle, and the two clamping buckles are located on both sides of the handle for clamping the adapter; each clamping buckle is connected to a button for the user to press to control the opening and closing of the clamping buckle.

9. The injection device as described in claim 7, characterized in that, The adapter has a plug-in protrusion on the end face facing the handle; The handle has a insertion groove on one end face facing the adapter, and the insertion protrusion is inserted into the insertion groove; The plug protrusion is provided with a foolproof part, the groove wall of the plug groove is provided with a foolproof groove, and the foolproof part is placed in the foolproof groove.

10. The injection device as described in claim 7, characterized in that, The adapter has a recessed mounting groove on its outer circumferential surface, and at least two limiting protrusions on the inner bottom surface of the mounting groove, with the two limiting protrusions located on both sides of the mounting groove; the injection head is installed in the mounting groove and is limited by the two limiting protrusions.

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