Ear Impression Preparation Material Injection Device

Abstract

The present invention discloses an ear impression preparation material injection device, which comprises: a barrel having a distal end and a proximal end along an injection direction, a plunger configured to move in the barrel, the plunger comprising a piston and a push rod; and a barrel tip, which is sealed and connected to the distal end of the barrel, and an extrusion port is provided at the distal end of the barrel tip; wherein the extrusion port is configured to include at least two extensions and at least two flow limiting members; the at least two extensions are configured to be notches formed by cutting off the periphery of the extrusion port; the at least two flow limiting members are configured to be substantially spherical portions arranged between two adjacent notches. The present invention has a reasonable structural design, is stable and reliable, and can improve the efficiency and accuracy of ear impression preparation. When the perfusion volume reaches a preset threshold, an alarm is issued in time to improve safety.

Description

Technical Field

[0001] The present invention relates to a hearing aid manufacturing device, and more particularly to an ear impression preparation material injection device. Background Art

[0002] In-ear hearing aids may be the most convenient and comfortable type of hearing aid. In-ear hearing aids have the characteristics of being suitable for individual ears; comfortable to wear; easy to put on or take off the hearing aid; making full use of the sound collection function of the outer ear; being relatively unobtrusive. The wearer can use the phone in a normal way and can also wear it when sleeping. In-ear hearing aids can be customized according to the patient's hearing and ear canal conditions. The preparation of ear impressions is a key step in customizing hearing aids. When making ear impressions, it is necessary to use a syringe to slowly and safely inject the preparation material into the patient's ear canal. The preparation material must fit the patient's ear canal completely to obtain an accurate ear impression. Existing syringes control the injection speed of the preparation material through the doctor's experience. If the speed is too fast, it will cause damage to the patient's ear canal; if the speed is too slow, part of the preparation material will solidify before the injection is complete, resulting in failure of ear impression preparation. How to control the speed of the syringe to inject the preparation material is a problem that needs to be solved urgently. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] Another object of the present invention is to provide an ear impression preparation material injection device, which can effectively control the extrusion speed of the preparation material, and can also effectively expand its filling surface when the preparation material is extruded, so that the preparation material completely fits the patient's ear canal, thereby improving the preparation efficiency and accuracy of the ear impression. At the same time, when the perfusion volume reaches a preset threshold, an alarm is issued in time to improve safety.

[0005] In order to achieve these purposes and other advantages according to the present invention, there is provided an ear impression preparation material injection device, comprising:

[0006] a barrel having a distal end and a proximal end along the injection direction,

[0007] a plunger configured to move within the barrel, the plunger comprising a piston and a push rod;

[0008] And a tube tip, which is sealed and connected to the distal end of the barrel, and the distal end of the tube tip is provided with an extrusion port; wherein the extrusion port is configured to include at least two extensions and at least two flow limiting members; the at least two extensions are configured to be notches formed by cutting off part of the periphery of the extrusion port; the at least two flow limiting members are configured to be substantially spherical portions arranged between two adjacent notches. The flow limiting member is, for example, spherical, and the outer wall of the flow limiting member is tangent to the inner wall of the extrusion port. Thereby, the outflow speed of the prepared material along the axial direction of the extrusion port hole can be reduced. The prepared material is, for example, a paste made of silicone or organic rubber. The notch can guide the prepared material to flow out from the notch, so that the prepared material expands into the ear canal at the extrusion port, so that the prepared material can better fit the inner wall of the patient's ear canal, thereby improving the accuracy of the customized ear impression.

[0009] Preferably, the flow limiter extends from the edge of the extrusion port to the hole axis of the extrusion port; the extension length of the flow limiter does not exceed two-thirds of the radius of the extrusion port. The size of the flow limiter is, for example, one-fourth of the diameter of the extrusion port. The size of the flow limiter is used to control the injection speed of the self-prepared material.

[0010] Preferably, the flow limiter is a blunt surface. Since the flow limiter is arranged at the end of the extrusion port, the blunt surface of the flow limiter can greatly improve the safety of the device and the safety of the operation.

[0011] Preferably, the flow restrictor has a polished and / or smooth surface portion, in particular a mechanically polished surface portion and / or an electro-polished surface portion.

[0012] Preferably, the plunger further comprises:

[0013] a sensor, which is disposed at the end of the piston and is used to detect the consumption of ear impression preparation material;

[0014] and an alarm, which is arranged at the tail end of the push rod and sounds an alarm when the consumption reaches a preset threshold.

[0015] Preferably, a capacity scale is also provided on the outer peripheral wall of the cylinder.

[0016] Preferably, the area of ​​the extended portion is not less than half of the surface area of ​​the flow limiting member.

[0017] Preferably, the barrel tip has a conical portion, the bottom of the conical portion is sealingly connected to the distal end of the barrel, and the top of the conical portion is provided with the extrusion port.

[0018] Preferably, the distal end of the piston is provided with a stepped end portion adapted to the conical portion of the barrel tip.

[0019] Preferably, a push handle is provided at the rear end of the push rod, and the alarm is provided on the push handle.

[0020] The present invention includes at least the following beneficial effects: the ear impression preparation material injection device of the present invention is provided with a flow limiting component at the periphery of the extrusion port, which can reduce the infusion speed of the preparation material, reduce the impact force of the preparation material on the patient's tympanic membrane during infusion, and protect the patient's tympanic membrane. At the same time, the expansion part can not only be used to offset the influence of the flow limiting component on the infusion speed, but also can change the outflow direction of the preparation material during infusion, so that the preparation material diffuses from the extrusion port to the surroundings during infusion, so that the preparation material can better fit the inner wall of the patient's ear canal, thereby improving the accuracy of the customized ear impression. The ear impression preparation material injection device of the present invention is also provided with a sensor and an alarm on the piston to detect the infusion amount in real time, and issue an alarm in time when the infusion amount exceeds the amount, so as to avoid damaging the patient's ear canal. The ear impression preparation material injection device of the present invention has a simple structure and low processing cost, and can greatly improve the preparation efficiency of customized ear impressions.

[0021] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of an ear impression preparation material injection device according to one embodiment of the present invention;

[0023] Figure 2 This is a schematic structural diagram of an ear impression preparation material injection device according to another embodiment of the present invention;

[0024] Figure 3 The figure is a top view of the barrel tip of the ear impression preparation material injection device according to one embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0026] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0027] like Figure 1 As shown, the present invention provides an ear impression preparation material injection device, which comprises:

[0028] The barrel 100 has a distal end 101 and a proximal end 102 along the injection direction. The proximal end 102 extends with two side wings, for example, to facilitate the control of the position of the barrel 100 during perfusion during surgery.

[0029] The plunger 200 is configured to move in the cylinder 100, and the plunger 200 includes a piston 201 and a push rod 202; a sensor 203 is provided at the end of the piston 201, and an alarm 204 is connected to the tail end of the push rod 202. The alarm 204 is provided with a chip for setting the preset threshold and an alarm for executing chip instructions. The sensor 203 is used to detect the perfusion amount of the preparation material, so that when the perfusion amount reaches the preset threshold, an alarm is issued. The preset threshold is pre-set according to the state of the patient's ear canal, for example.

[0030] And a tip 300, which is sealed and connected to the distal end 101 of the barrel 100, and the distal end of the tip 300 is provided with an extrusion port 301; wherein the extrusion port 301 is configured to include at least two extensions 302 and at least two flow limiting members 303; the at least two extensions 302 are configured to be notches formed by cutting off part of the periphery of the extrusion port 301; the at least two flow limiting members 303 are configured to be substantially spherical portions arranged between two adjacent notches. The flow limiting member 303 is configured to be spherical, and the outer wall of the flow limiting member 303 is tangent to the inner wall of the extrusion port 301. Thus, the outflow speed of the prepared material along the hole axis direction of the extrusion port 301 can be reduced. The extension 302 can guide the prepared material to flow out from the notch, so that the prepared material expands into the ear canal at the extrusion port 301, so that the prepared material can be more closely fitted to the inner wall of the patient's ear canal, thereby improving the accuracy of the customized ear impression.

[0031] When in use, the preset threshold is set according to the infusion amount of the preparation material required for the customized ear impression, and the sensor 203 is started; then the preparation material is injected into the barrel 100, and the push rod 202 is pushed to appropriately control the infusion speed of the preparation material. When the infusion is completed, it can stop automatically or stop according to the alarm. At present, when preparing an ear impression, the infusion speed of the preparation material is often controlled according to the doctor's experience. If the extrusion port of the syringe is too large, the outflow speed of the preparation material is too large, which will cause damage to the patient's tympanic membrane. If the extrusion port is too small, the doctor needs to apply a greater thrust, and the stability of the infusion cannot be guaranteed, and it may also accidentally shift and damage the patient's ear canal. The ear impression preparation material injection device of the present invention buffers the outflow speed of the preparation material through the flow limiting member 303, and at the same time uses the expansion part 302 to reduce the resistance to the outflow of the preparation material, thereby improving the infusion stability.

[0032] In one embodiment, if Figure 1 and Figure 3As shown, the flow limiter 303 extends from the edge of the extrusion port 301 to the hole axis of the extrusion port 301; the extension length of the flow limiter 303 does not exceed two-thirds of the radius of the extrusion port 301. The size of the flow limiter 303 is, for example, one-fourth of the diameter of the extrusion port 301. The size of the flow limiter 303 is used to control the injection speed of the self-prepared material.

[0033] In one embodiment, if Figure 1 As shown, the flow limiter 303 is a blunt surface. Since the flow limiter 303 is arranged on the periphery of the extrusion port 301. At the starting position of perfusion, it is closest to the patient's tympanic membrane and has the highest probability of contacting the inner wall of the patient's ear canal. Therefore, in order to protect the patient's ear canal from damage, the flow limiter 303 is set to a blunt surface, which can greatly improve the safety of the device and the safety of the operation. The flow limiter 303 is, for example, set to an elliptical, spherical or disc shape as required, which can serve as a structure to limit the outflow rate of the preparation material.

[0034] In one embodiment, if Figure 1-Figure 3 As shown, the flow limiter 303 has a polished and / or smooth surface portion, especially a mechanically polished surface portion and / or an electro-polished surface portion. Of course, it can also be drop-casted directly on the periphery of the extrusion port 301 according to the material (plastic or metal) of the barrel tip 300 by drop-casting.

[0035] In one embodiment, if Figure 1 and Figure 2 As shown, the plunger 200 also includes:

[0036] A sensor 203, which is arranged at the end of the piston 201 and is used to detect the consumption of ear impression preparation material;

[0037] and an alarm 204, which is disposed at the rear end of the push rod 202 and sounds an alarm when the consumption reaches a preset threshold. Figure 1 As shown, the rear end of the push rod 202 is provided with an enlarged portion 2021, and the alarm 204 is, for example, arranged in the enlarged portion 2021, and the alarm 204 includes, for example, a built-in chip and an indicator light or a buzzer (not shown in the figure). The enlarged portion 2021 can also serve as a stopper, and the corresponding proximal end of the cylinder 100 is also configured as an enlarged proximal end 102. The enlarged proximal end 102 can also extend two side wings 1021 for the doctor to hold.

[0038] In one embodiment, if Figure 1 and Figure 2As shown, a capacity scale 103 is also provided on the outer peripheral wall of the barrel 100. The barrel 100 is, for example, transparent, and the capacity scale 103 is used to provide a capacity indication to the operator to avoid wasting preparation materials.

[0039] In one embodiment, if Figure 1 As shown, the area of ​​the expansion part 302 is not less than half of the surface area of ​​the flow limiting member 303. Therefore, the preparation material stopped by the flow limiting member 303 will be released from the expansion part 302 accordingly, and the outflow direction of the preparation material can be changed. Thus, the contact area between the preparation material and the inner wall of the patient's ear canal can be expanded during perfusion, thereby improving the accuracy of the customized ear impression.

[0040] In one embodiment, if Figure 1 and Figure 2 As shown, the barrel tip 300 has a conical portion, the bottom of which is sealedly connected to the distal end 101 of the barrel body 100, and the top of which is provided with the extrusion port 301. The conical portion is used to reduce the outflow speed of the preparation material from the extrusion port 301, and also to reduce the impact force of the preparation material when it flows out. This can not only improve the accuracy of preparing the ear impression, but also improve the safety during the preparation process.

[0041] In one embodiment, if Figure 1 As shown, the distal end of the piston 201 is provided with a stepped end 2011 adapted to the conical portion of the barrel tip 300. Thus, the waste of preparation materials can be reduced.

[0042] In one embodiment, if Figure 2 As shown, a push handle 205 is provided at the rear end of the push rod 202, and the alarm 204 is provided on the push handle 205. The push handle 205 is used to reduce the doctor's work intensity and improve the doctor's work efficiency. The alarm 204 is provided on the push handle 205, which is convenient for the doctor to observe the perfusion process more intuitively and conveniently.

[0043] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An ear impression preparation material injection device, characterized in that: include: a barrel having a distal end and a proximal end along the injection direction, a plunger configured to move within the barrel, the plunger comprising a piston and a push rod; and a barrel tip, which is sealed and connected to the distal end of the barrel body, wherein the distal end of the barrel tip is provided with an extrusion port; wherein the extrusion port is configured to include at least two extensions and at least two flow restrictors; the at least two extensions are configured to be notches formed by cutting off a portion of the periphery of the extrusion port; and the at least two flow restrictors are configured to be substantially spherical portions provided between two adjacent notches; The flow restrictor has a polished and / or smooth surface portion, and the surface portion is mechanically polished and / or electro-polished.

2. The ear impression preparation material injection device according to claim 1, characterized in that: The flow limiting member extends from the edge of the extrusion port to the hole axis of the extrusion port; the extension length of the flow limiting member does not exceed two-thirds of the radius of the extrusion port.

3. The ear impression preparation material injection device according to claim 1, characterized in that: The flow limiting component is a blunt surface.

4. The ear impression preparation material injection device according to claim 1, characterized in that: The plunger also includes: a sensor, which is disposed at the end of the piston and is used to detect the consumption of ear impression preparation material; and an alarm, which is arranged at the tail end of the push rod and sounds an alarm when the consumption reaches a preset threshold.

5. The ear impression preparation material injection device according to claim 1, characterized in that: A capacity scale is also arranged on the outer peripheral wall of the cylinder.

6. The ear impression preparation material injection device according to claim 1, characterized in that: The area of ​​the extended portion is not less than half of the surface area of ​​the flow limiting member.

7. The ear impression preparation material injection device according to claim 1, characterized in that: The barrel tip has a cone portion, the bottom of which is sealingly connected to the distal end of the barrel body, and the top of which is provided with the extrusion port.

8. The ear impression preparation material injection device according to claim 7, characterized in that: The distal end of the piston is provided with a stepped end portion adapted to the conical portion of the barrel tip.

9. The ear impression preparation material injection device according to claim 4, characterized in that: A push handle is arranged at the rear end of the push rod, and the alarm is arranged on the push handle.

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