An electric ear-impression injector

Abstract

The utility model discloses an electric ear impression mould injector, its characterized in that: including casing, push part and adapter, be equipped with the guide part on the casing, the push part includes electric drive part and pusher, electric drive part is installed in the casing below the guide part, electric drive part is configured to drive pusher moves along the guide part before and after, the casing on the guide part front end is equipped with the limiting slot, the outer edge of adapter is detachably installed in the limiting slot, and the adapter is opposite pusher and sets, the upper of adapter is equipped with the positioning cavity and at least one with the positioning cavity intercommunication's let -alone hole, and ear sample paste pipe one end is detachably connected with the positioning cavity, and pusher is opposite let -alone hole and sets, the utility model discloses has improved the convenience of use and injection precision, reduced operator's labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of hearing aids, and more particularly to an electric ear impression syringe. Background Technology

[0002] Auricularia auricularia (also known as ear impression material) is a special material used to create precise models of the ear canal or auricle. Its core applications include personalized hearing aid customization, precision earplug manufacturing, and medical diagnostic model acquisition. The key characteristics of this material are its excellent plasticity, outstanding biocompatibility, and reliable curing stability, enabling it to accurately capture and replicate the subtle features of the ear structure. Traditional syringes (similar to conventional medical syringes) rely on manual control, injecting the auricularia auricularia by squeezing a piston or plunger with a lever. However, because manual operation makes it difficult to achieve highly precise force and speed control through muscle memory, the extrusion process of the auricularia auricularia is often uneven, and the extrusion volume is unstable (manual control results in fluctuations of ±15% to 20%, and continuous operation can lead to fatigue). This not only affects the accuracy of the model but also easily leads to material waste. More importantly, existing syringe structures typically only accommodate a single size of auricularia auricularia tube, lacking versatility. They cannot simultaneously accommodate and effectively fix auricularia auricularia tubes with different cross-sectional shapes, such as the common square and round tubes. Therefore, in practical applications, each type of ear-shaped ointment tube must be equipped with a dedicated syringe of the corresponding specification. This one-to-one matching method inevitably leads to unnecessary consumption of equipment resources and additional occupation of storage space. Summary of the Invention

[0003] The purpose of this invention is to provide an electric ear impression syringe. By using this structure, the applicability is improved, the cost is reduced, and the labor intensity of operators is also reduced.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: an electric ear impression syringe, characterized in that it includes a housing and a pushing component;

[0005] The housing is provided with a guide component;

[0006] The pushing component includes an electric drive unit and a pushing member. The electric drive unit is installed in a housing below the guide component and is configured to drive the pushing member to move back and forth along the guide component.

[0007] The front end of the guide component is provided with a limiting groove, and the rear end of the ear-shaped ointment tube is detachably inserted into the limiting groove, with the ear-shaped ointment tube facing the pusher.

[0008] An adapter is also provided, and the rear end of the ear-shaped ointment tube can be detachably installed in the limiting groove via the adapter, with the adapter facing the pusher.

[0009] The adapter is provided with a positioning cavity and at least one clearance hole communicating with the positioning cavity. The rear end of the ear ointment tube is detachably connected to the positioning cavity. The pusher is positioned directly opposite the clearance hole. When the electric drive unit drives the pusher to move back and forth, the front end of the pusher passes through the clearance hole and is inserted into the ear ointment tube, or the front end of the pusher disengages from the ear ointment tube and the clearance hole and is positioned on the rear side of the adapter.

[0010] In the above technical solution, one end of the limiting groove is connected to the outer wall of the housing.

[0011] In the above technical solution, the limiting groove includes a front groove and a rear groove that are interconnected. The width of the front groove is greater than the width of the rear groove. The rear end of the ear-like ointment tube is locked in the rear groove, or the adapter is locked in the rear groove. The front end of the ear-like ointment tube passes through the front groove and is located at the front end of the housing.

[0012] In the above technical solution, the front end of the positioning cavity is connected to the front end face of the adapter, and one end of the positioning cavity is connected to the outer side wall of the adapter; the front end of the clearance hole is connected to the positioning cavity, and the rear end of the clearance hole is connected to the rear end face of the adapter.

[0013] The positioning cavity has a slot at the top and bottom, one end of which is connected to the outer wall of the adapter. The rear end of the ear-shaped ointment tube is accommodated in the positioning cavity, and the top and bottom of the rear end of the ear-shaped ointment tube are respectively locked in the two slots.

[0014] In the above technical solution, the electric drive unit includes a motor assembly, the output end of the motor assembly is provided with a gear, the pusher is provided with a rack that meshes with the gear, the motor assembly is configured to drive the gear to rotate, and drive the pusher to move back and forth along the guide member via the rack.

[0015] In the above technical solution, there are two clearance holes, which are spaced apart. The front end of the pusher is provided with two push rods, which are spaced apart. Each push rod is positioned opposite one of the clearance holes.

[0016] In the above technical solution, a power supply component is also provided inside the housing, which supplies power to the motor assembly;

[0017] And / or, the housing is further provided with a controller, which is electrically connected to the power supply component and the motor assembly.

[0018] In the above technical solution, the pusher is provided with two parallel racks, and the motor assembly is also rotatably mounted with a transmission gear that meshes with the gear. The gear meshes with one of the racks, and the transmission gear meshes with the other rack.

[0019] In the above technical solution, the top of the electric drive unit is provided with two sets of limiting members, and the pusher is slidably disposed between the two limiting members.

[0020] In the above technical solution, the housing has a receiving chamber, the front end of the receiving chamber is connected to the limiting groove, and the rear end of the receiving chamber is connected to the rear end face of the housing; the limiting member is disposed in the receiving chamber, and the receiving chamber constitutes the guiding member, or the receiving chamber and the limiting member constitute the guiding member.

[0021] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0022] 1. In this utility model, an adapter is used to install the ear sample ointment tube on the housing, and an electric drive unit drives the pusher to move. The movement of the pusher is used to squeeze the ear sample ointment in the ear sample ointment tube, so as to achieve precise extrusion of the ear sample ointment. Compared with the previous manual extrusion method, it effectively reduces the labor intensity of the operator and improves the accuracy of the ear sample ointment extrusion amount.

[0023] 2. By setting an adapter, different shaped ear-shaped ointment tubes can be installed on the shell for extruding ear-shaped ointment from different shaped tubes, thereby improving the applicability and reducing costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure in Embodiment 1 of this utility model;

[0025] Figure 2 This is a structural schematic diagram of Embodiment 1 of this utility model (without the ear-shaped ointment tube and adapter installed);

[0026] Figure 3 This is a structural schematic diagram of Embodiment 1 of this utility model (part of the shell is not shown);

[0027] Figure 4 yes Figure 1 Exploded view;

[0028] Figure 5 This is a schematic diagram of the pusher component in Embodiment 1 of this utility model;

[0029] Figure 6This is a schematic diagram of the structure of the pusher and the electric drive unit in Embodiment 1 of this utility model (gears and transmission gears are not shown);

[0030] Figure 7 This is a schematic diagram of the structure of the connection between the gear, the transmission gear and the rack in Embodiment 1 of this utility model;

[0031] Figure 8 This is a schematic diagram of the adapter in Embodiment 1 of this utility model.

[0032] The components include: 1. Housing; 2. Adapter; 3. Electric drive unit; 4. Pushing component; 5. Limiting groove; 6. Positioning cavity; 7. Relief hole; 8. Ear-shaped ointment tube; 9. Slot; 10. Gear; 11. Rack; 12. Push rod; 13. Power supply component; 14. Battery cover; 15. Control circuit board; 16. Speed ​​knob; 17. Reset button; 18. Switch button; 19. Battery foam; 20. Motor foam; 21. Transmission gear; 22. Limiting component; 23. Receiving chamber; 24. Limit switch. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0034] Example 1: See Figure 1-8 As shown, an electric ear impression injector includes a housing 1, a pushing component, and an adapter 2;

[0035] The housing 1 is provided with a guide component;

[0036] The pushing component includes an electric drive unit 3 and a pushing member 4. The electric drive unit 3 is installed in the housing 1 below the guide component, and the electric drive unit 3 drives the pushing member 4 to move back and forth along the guide component.

[0037] The front end of the guide component is provided with a limiting groove 5, and the outer edge of the adapter 2 is detachably installed in the limiting groove 5. The adapter 2 is positioned directly opposite the pusher 4.

[0038] The adapter 2 is provided with a positioning cavity 6 and at least one clearance hole 7 communicating with the positioning cavity 6. The rear end of the ear ointment tube 8 is detachably connected to the positioning cavity 6. The pusher 4 is positioned directly opposite the clearance hole 7. When the electric drive unit 3 drives the pusher 4 to move back and forth, the front end of the pusher 4 passes through the clearance hole 7 and is inserted into the ear ointment tube 8, or the front end of the pusher 4 disengages from the ear ointment tube 8 and the clearance hole 7 and is positioned on the rear side of the adapter 2.

[0039] In this embodiment, the ear-like ointment tube has an existing structure with a chamber. The rear end of the chamber is connected to the rear end face of the ear-like ointment tube, and the front end has an outlet (the outlet is initially closed and is opened or cut open when needed). The chamber contains ear-like ointment (ear impression material), and a piston is installed in the chamber at the rear end of the ear-like ointment. The chamber generally has two cross-sectional shapes: circular and square. In this embodiment, the adapter can be of one type, with a clearance hole that can be either circular or square, the size of which is smaller than the front end of the pusher. The clearance hole can also have two shapes: one circular shape to fit a circular ear-like ointment tube chamber, and another square shape to fit a square ear-like ointment tube chamber, the size of which is smaller than the size of the pusher. Depending on the ear-like ointment tube, the corresponding adapter is selected to connect the ear-like ointment tube and the shell. In this invention, the adapter is a type of device that uses a circular clearance hole with a diameter smaller than the size of the front end of the pusher (slightly smaller than the size of the pusher, to ensure the contact area between the pusher and the piston). In this way, regardless of whether the ear-shaped ointment tube is square or round, the front end of the pusher can pass through the clearance hole and contact the piston, thus pushing the piston to move.

[0040] Of course, as another embodiment: if the ear-shaped ointment tube is circular, its rear end can directly fit into the limiting groove, and the rear end of the ear-shaped ointment tube directly engages with the limiting groove without the need for an adapter. If injection is required for a square-shaped ear-shaped ointment tube, the rear end of the square-shaped ear-shaped ointment tube engages with the limiting groove via an adapter. In this method, the adapter allows different ear-shaped ointment tubes to be mounted on the housing, enabling electric injection and providing greater compatibility.

[0041] Of course, depending on the required ear-shaped ointment tube, you can choose whether to use an adapter to connect the ear-shaped ointment tube and the housing, or select the corresponding model of adapter for connecting the ear-shaped ointment tube and the housing.

[0042] In practical use, taking the example of all ear-like ointment tubes needing to be installed on the housing via an adapter, the rear end of the ear-like ointment tube is connected to the positioning cavity of the adapter, thus connecting the ear-like ointment tube and the adapter. At this point, the clearance hole is aligned with the chamber of the ear-like ointment tube. Then, the adapter with the ear-like ointment tube installed is installed into the limiting groove of the housing. The limiting groove limits the adapter's movement relative to the housing. At this time, the pusher is aligned with the clearance hole, and then the electric drive unit is controlled to work. The electric drive unit drives the pusher to move forward. The front end of the pusher passes through the clearance hole and abuts against the piston of the ear-like ointment tube, and then continues to move forward. The pusher pushes the piston forward, and the forward movement of the piston pushes the ear-like ointment in the ear-like ointment tube to be extruded from its front outlet. In this method, the electric drive is highly efficient and reduces the labor intensity of the operator. At the same time, the electric drive method is more precise than the manual piston movement method, and the extrusion accuracy is higher than the previous manual control method. After the ear-like ointment is completely extruded from the tube, the electric drive unit drives the pusher to move backward, causing the front end of the pusher to move backward and disengage from the ear-like ointment tube and the clearance hole. This allows the adapter to be removed from the limiting groove of the housing. During this process, the ear-like ointment tube will also be detached from the housing. Afterward, a new ear-like ointment tube can be replaced, and the above steps can be repeated for use.

[0043] See Figure 2 As shown, one end of the limiting groove 5 is connected to the outer side wall of the housing 1. In this embodiment, the right end of the limiting groove is connected to the right side wall of the housing. Therefore, when installing or removing the adapter, the adapter with the ear-like ointment tube is positioned facing the right side of the limiting groove, and then moved to the left to engage with the limiting groove, thus achieving the installation of the adapter. Subsequently, the pushing member moves forward and abuts against the piston. When the piston moves forward, the limiting groove limits the adapter, thereby preventing the adapter and the ear-like ointment tube from moving back and forth relative to the housing, ensuring that the ear-like ointment in the ear-like ointment tube can be smoothly and stably extruded.

[0044] The limiting groove includes a front groove and a rear groove that are interconnected. The width of the front groove is greater than the width of the rear groove. The adapter is engaged in the rear groove. The front end of the ear-shaped ointment tube passes through the front groove and is positioned at the front end of the housing.

[0045] In this embodiment, the length of the ear-shaped ointment tube is longer than the thickness of the adapter. In order to facilitate the normal extrusion of the ear-shaped ointment tube, the front end of the front groove is connected to the front end face of the shell. In order to restrict the forward and backward movement of the adapter, the width of the rear groove is greater than the width of the front groove. The width of the adapter is adapted to the width of the rear groove. The width of the adapter is greater than the width of the front groove. Therefore, the rear groove limits the forward and backward movement of the adapter, while the front groove makes way for the ear-shaped ointment tube. Since the left end of the limiting groove is not connected to the left side wall of the shell, the limiting groove can also limit the leftward movement of the adapter and the ear-shaped ointment tube from detaching from the shell. In this way, when the adapter is installed in the limiting groove, the left end of the limiting groove can also be used to limit the leftward movement of the adapter into the limiting groove, ensuring the accuracy of the adapter installation position.

[0046] See Figure 3 , 7 As shown, the front end of the positioning cavity 6 is connected to the front end face of the adapter 2, and one end of the positioning cavity 6 is connected to the outer side wall of the adapter 2; the front end of the clearance hole 7 is connected to the positioning cavity 6, and the rear end of the clearance hole 7 is connected to the rear end face of the adapter 2.

[0047] The top and bottom of the positioning cavity 6 are respectively provided with a slot 9. One end of the slot 9 is connected to the outer wall of the adapter 2. The rear end of the ear ointment tube 8 is accommodated in the positioning cavity 6, and the top and bottom of the rear end of the ear ointment tube 8 are respectively locked in the two slots 9.

[0048] In this embodiment, the rear end of the ear-like ointment tube has a mounting plate, which is equivalent to a handle of a syringe. Both ends of the mounting plate are located outside the ear-like ointment tube, and its width is greater than the size of the ear-like ointment tube. Therefore, the mounting plate is placed into the positioning cavity, and the ends of the mounting plate exposed outside the ear-like ointment tube are respectively inserted into the slots on both sides of the positioning groove. In this way, the positioning cavity and slots of the adapter can be used to limit the ear-like ointment tube.

[0049] In this embodiment, the left end of the positioning cavity is connected to the left side of the adapter, and the left end of the slot is also connected to the left side of the adapter. In this structure, when the adapter is inserted into the limiting groove from right to left, the left end of the limiting groove can restrict the ear-like ointment tube, preventing it from moving to the left and detaching from the adapter, and also preventing it from moving to the right and detaching from the adapter. When removing the adapter from the limiting groove, since most or all of the adapter is within the limiting groove, it is inconvenient to remove it. At this time, the operator can grasp the ear-like ointment tube and pull it to the right. Because the positioning cavity and slot are not connected to the right side wall of the adapter, the pulling force applied to the ear-like ointment tube to the right will be directly transmitted to the adapter, thereby causing the adapter to move to the right and detach from the limiting groove, facilitating the removal of the adapter from the housing. Preferably, the adapter is made of ABS, PC, or a combination of both materials.

[0050] See Figure 5 , 6 As shown, the electric drive unit 3 includes a motor assembly, a gear 10 is provided on the output end of the motor assembly, and a rack 11 is provided on the pusher 4 to mesh with the gear 10. The motor assembly is configured to drive the gear 10 to rotate and drive the pusher 4 to move back and forth along the guide member via the rack 11.

[0051] In this embodiment, the motor assembly can be a single motor or a combination of a motor and a reducer. Preferably, the motor assembly is a combination of a motor and a reducer, with the motor's output shaft connected to the reducer and the gear mounted on the reducer's output shaft. Since the pusher is limited by the guide component, when the motor assembly drives the gear to rotate, the gear, through meshing with the rack, will cause the pusher to move along the guide component. For example, if the gear rotates forward, causing the pusher to move forward; if the gear rotates in reverse, it will cause the pusher to move backward. By controlling the forward and reverse rotation of the motor assembly driving the gear, the forward or backward movement of the pusher can be controlled. By controlling the rotational speed of the motor assembly driving the gear, the speed at which the pusher drives the ear-shaped paste extrusion can be controlled, thereby precisely controlling the extrusion volume.

[0052] See Figure 3 , 8 As shown, there are two clearance holes 7, which are spaced apart. The front end of the pusher 4 is provided with two push rods 12, which are spaced apart. Each push rod 12 is positioned opposite one clearance hole 7.

[0053] In this embodiment, the ear-like ointment tube has two chambers, each containing a piston. Therefore, two clearance holes are provided directly opposite the two push rods. The diameter of the push rods is slightly smaller than the diameter of the positioning holes, and the diameter of the push rods is also slightly smaller than the diameter of the pistons. This ensures that when the pusher moves the push rods forward, the push rods will not contact the inner wall of the clearance holes or the inner wall of the ear-like ointment tube, thus ensuring stable and precise movement of the pistons and squeezing out the ear-like ointment inside.

[0054] See Figure 3 , 4 As shown in Figure 6, a power supply component 13 is also provided inside the housing 1, which supplies power to the motor assembly. The power supply component uses a battery, preferably a rechargeable battery, which is connected to the motor assembly to supply power. A battery compartment is provided inside the housing for battery installation, and a charging interface, such as a Type-C interface, is provided on the outer wall of the housing for connecting to the power supply component, thus eliminating the need for battery replacement. Alternatively, the battery can be replaceable; it can be replaced when charging is inconvenient. Therefore, a battery cover 14 is provided on the housing to open the housing and expose the battery compartment inside, facilitating battery installation and replacement.

[0055] The housing also includes a controller, which is electrically connected to the power supply component and the motor assembly. The controller includes a control circuit board 15 and a control switch. The control circuit board is located inside the housing and connected to the motor assembly, power supply component, and control switch. The control switch can control the motor assembly to operate, stop, rotate forward, reverse, and adjust its speed via the control circuit board. In this embodiment, the end of the control switch protrudes from the outer wall of the housing for easy operator control. The control switch includes a speed knob 16, a reset button 17, and a switch button 18. The switch button controls the motor assembly to operate and moves the pusher forward. The reset button controls the motor assembly to operate and moves the pusher back to its initial position. The speed knob controls the rotational speed of the motor assembly and the gear speed, thereby controlling the movement speed of the pusher.

[0056] The housing also includes battery foam 19 and motor foam 20. The battery foam covers the power supply components, and the motor foam covers the motor assembly. The battery foam protects the power supply components from wear, while the motor foam effectively prevents collisions between the motor assembly and the housing, reducing noise. Alternatively, battery and motor foam can be omitted, depending on the specific requirements.

[0057] See Figure 5-7As shown, the pusher 4 has two parallel racks 11, and the motor assembly also has a transmission gear 21 that meshes with the gear 10. The gear 10 meshes with one of the racks 11, and the transmission gear 21 meshes with the other rack 11. This ensures that when the gear rotates and meshes with one of the racks, and when the other transmission gear meshes with the other rack, both racks receive a thrust in the same direction, ensuring smooth movement of the pusher.

[0058] Two racks are set with a left-right gap. Gears and transmission gears are set between the two racks. Preferably, the two racks are set opposite each other. This can stably drive the pusher to move back and forth, so that the two push rods move forward to the same position, so that they do not deviate to one side or have a greater force on one side, which would cause uneven force on the pistons of the two chambers of the ear ointment tube.

[0059] See Figure 3 , 6 As shown, the top of the electric drive unit 3 is provided with two sets of limiting members 22, and the pusher 4 is slidably disposed between the two limiting members 22. The two sets of limiting members can restrict the pusher, thereby ensuring that the pusher moves stably back and forth and does not deviate to the left or right.

[0060] See Figure 3 As shown, the housing 1 has a receiving chamber 23. The front end of the receiving chamber 23 is connected to the limiting groove 5, and the rear end of the receiving chamber 23 is connected to the rear end face of the housing 1. The limiting member 22 is disposed in the receiving chamber 23. The receiving chamber 23 constitutes the guiding member, or the receiving chamber and the limiting member constitute the guiding member. In this embodiment, the receiving chamber and the limiting member constitute the guiding member.

[0061] When the pusher is in the rear position, its rear end is outside the rear end of the receiving chamber, thus reducing the material used in the housing. The height of the receiving chamber is adapted to the thickness of the pusher, preventing vertical displacement of the pusher. Two sets of limiting members further restrict horizontal displacement of the pusher, ensuring that the pusher can only move back and forth.

[0062] More preferably, two limit switches 24 (or sensors) are installed in the accommodating chamber and electrically connected to the controller. The two limit switches are respectively located on the left and right sides of the front end of the accommodating chamber, directly opposite the two push rods of the pusher. The bottom of the push rod has a protrusion facing the corresponding limit switch, which is used to detect the forward movement position of the pusher, thereby accurately controlling the forward movement of the pusher and accurately controlling the extrusion amount of the ear-shaped ointment. The limit switches can be installed on the electric drive unit.

[0063] In this embodiment, the housing includes two symmetrical half-shells. One half-shell has a snap-fit ​​component, and the other half-shell has a mating component. The snap-fit ​​component and the mating component are inserted or snapped together to assemble the housing, thereby confining the electric drive unit, pusher, and other components within the housing. Compared to screw fixing, the assembly time can be reduced by one-third by using the snap-fit ​​method, which also reduces costs, improves production efficiency, and lightens the overall weight. Additionally, anti-slip grooves can be provided on the housing, positioned at the user's grip point, improving operational comfort and stability. Of course, the two half-shells can also be connected by bolts.

[0064] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of the invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0065] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. For instance, the two components can be mechanically connected by contact or abutting; they can also be directly hooked or connected by an intermediate medium; or they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. An electric ear impression syringe, characterized in that: Includes the housing and the actuating components; The housing is provided with a guide component; The pushing component includes an electric drive unit and a pushing member. The electric drive unit is installed in a housing below the guide component and is configured to drive the pushing member to move back and forth along the guide component. The front end of the guide component is provided with a limiting groove, and the rear end of the ear-shaped ointment tube is detachably inserted into the limiting groove, with the ear-shaped ointment tube facing the pusher. An adapter is also provided, and the rear end of the ear-shaped ointment tube can be detachably installed in the limiting groove via the adapter, with the adapter facing the pusher. The adapter is provided with a positioning cavity and at least one clearance hole communicating with the positioning cavity. The rear end of the ear ointment tube is detachably connected to the positioning cavity. The pusher is positioned directly opposite the clearance hole. When the electric drive unit drives the pusher to move back and forth, the front end of the pusher passes through the clearance hole and is inserted into the ear ointment tube, or the front end of the pusher disengages from the ear ointment tube and the clearance hole and is positioned on the rear side of the adapter.

2. The electric ear impression syringe according to claim 1, characterized in that: One end of the limiting groove is connected to the outer wall of the housing.

3. The electric ear impression syringe according to claim 2, characterized in that: The limiting groove includes a front groove and a rear groove that are interconnected. The width of the front groove is greater than the width of the rear groove. The rear end of the ear-shaped ointment tube is engaged in the rear groove, or the adapter is engaged in the rear groove. The front end of the ear-shaped ointment tube passes through the front groove and is disposed at the front end of the housing.

4. The electric ear impression syringe according to claim 1 or 2, characterized in that: The front end of the positioning cavity is connected to the front end face of the adapter, and one end of the positioning cavity is connected to the outer side wall of the adapter; the front end of the clearance hole is connected to the positioning cavity, and the rear end of the clearance hole is connected to the rear end face of the adapter. The positioning cavity has a slot at the top and bottom, one end of which is connected to the outer wall of the adapter. The rear end of the ear-shaped ointment tube is accommodated in the positioning cavity, and the top and bottom of the rear end of the ear-shaped ointment tube are respectively locked in the two slots.

5. The electric ear impression syringe according to claim 1, characterized in that: The electric drive unit includes a motor assembly, the output end of which is provided with a gear, and the pusher is provided with a rack that meshes with the gear. The motor assembly is configured to drive the gear to rotate and, via the rack, drive the pusher to move back and forth along the guide member.

6. The electric ear impression syringe according to claim 5, characterized in that: There are two clearance holes, which are spaced apart. The front end of the pusher is provided with two push rods, which are spaced apart. Each push rod is positioned opposite one of the clearance holes.

7. The electric ear impression injector according to claim 5, characterized in that: The housing also contains a power supply component, which supplies power to the motor assembly. And / or, the housing is further provided with a controller, which is electrically connected to the power supply component and the motor assembly.

8. The electric ear impression syringe according to claim 6, characterized in that: The pusher is provided with two parallel racks, and the motor assembly is also rotatably mounted with a transmission gear that meshes with the gear. The gear meshes with one of the racks, and the transmission gear meshes with the other rack.

9. The electric ear impression syringe according to claim 1, characterized in that: The top of the electric drive unit is provided with two sets of limiting members, and the pusher is slidably disposed between the two limiting members.

10. The electric ear impression syringe according to claim 9, characterized in that: The housing has a receiving chamber, the front end of which is connected to the limiting groove, and the rear end of which is connected to the rear end face of the housing; the limiting member is disposed in the receiving chamber, and the receiving chamber constitutes the guiding member, or the receiving chamber and the limiting member constitute the guiding member.

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