Medical hand-held device and inner ear drug delivery device

Abstract

The utility model provides a kind of medical handheld device and inner ear dosing device;The medical handheld device includes handheld shell and connector at one end of handheld shell;The connector has the through setting connector inner cavity, and handheld shell has the shell inner cavity being communicated with connector inner cavity;The connector is used for the detachable connection with the needle holder of puncture needle, and the connector inner cavity of connector is used for the sealed insertion of duct, so that, operator only needs to insert puncture needle into inner ear by medical handheld device, direct dosing of inner ear can be carried out, there is only one insertion operation in the whole process, effectively simplify operation process, improve operation convenience.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a medical handheld device and an inner ear drug delivery device. Background Technology

[0002] Tinnitus, hearing loss, and other inner ear diseases are characterized by recurrent, paroxysmal, episodic vertigo, hearing loss, and tinnitus. Inner ear drug delivery techniques are generally used for treatment. Current inner ear drug delivery techniques include tympanic cavity drug delivery and direct inner ear drug delivery. Tympanic cavity drug delivery involves directly delivering medication to the tympanic cavity of the middle ear, allowing the drug to diffuse through the round window membrane into the inner ear, achieving indirect inner ear drug delivery. Direct inner ear drug delivery, on the other hand, delivers the drug directly into the inner ear. Due to the uncontrollable diffusion characteristics of tympanic cavity drug delivery, it is difficult to ensure that a sufficient amount of drug enters the inner ear, affecting the treatment effect. Therefore, direct inner ear drug delivery has been widely used.

[0003] Direct drug administration to the inner ear is generally performed using a syringe and a catheter connected to a microinfusion pump. However, syringes require manual operation, which makes precise dosage control difficult in micro- or nano-scale inner ear drug delivery scenarios, potentially affecting efficacy or causing adverse reactions. While catheters connected to microinfusion pumps can achieve precise drug delivery, their flexibility makes it difficult to directly puncture the round window membrane for insertion into the inner ear. Therefore, current practice involves first using a puncture tool to create an insertion channel through the round window membrane, then aligning the catheter with this channel and inserting it into the inner ear. This process requires two insertion operations, resulting in lengthy procedures and inconvenience. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a medical handheld device and an inner ear drug delivery device. The medical handheld device is used to realize the detachable connection and conduction of the catheter and the puncture needle, so that the operator can stably deliver the drug into the inner ear by simply inserting the puncture needle into the inner ear with the help of the medical handheld device, which effectively simplifies the operation process and improves the convenience of operation.

[0005] To achieve the above and other related objectives, this utility model provides a medical handheld device for connecting a catheter and a puncture needle. The medical handheld device includes a handheld shell and a connector at one end of the handheld shell. The connector has a through-hole cavity, and the handheld shell has a shell cavity communicating with the connector cavity. The connector is detachably connected to the needle hub of the puncture needle, and one end of the catheter passes through the shell cavity and is sealed and inserted into the connector cavity. Thus, the operator only needs to use the medical handheld device to insert the puncture needle into the inner ear to directly administer medication to the inner ear. The entire process involves only one insertion operation, effectively simplifying the operation process and improving operational convenience.

[0006] Preferably, the handheld shell includes a first half-shell and a second half-shell, and the first half-shell is integrally formed with the connector; the second half-shell is movable relative to the first half-shell to switch between an open state and a closed state; when the second half-shell is in the closed state, the second half-shell and the first half-shell cooperate to form a shell cavity for accommodating a portion of the conduit; the portion of the conduit located in the shell cavity is constrained and fixed on the handheld shell; since this application allows one end of the conduit to be inserted into the connector cavity of the connector in the open state of the second half-shell, the difficulty of inserting the conduit is effectively reduced and the assembly convenience is improved; at the same time, the shell cavity formed after the second half-shell is closed can also constrain and fix the conduit to prevent the conduit assembled in the connector cavity from being accidentally pulled out of the connector, ensuring the connection stability during use.

[0007] Preferably, the second half-shell is rotatably connected to one side of the first half-shell via a hinge, and the second half-shell is detachably connected to the other side of the first half-shell via a locking device. This not only prevents the second half-shell from being lost, but also reduces the difficulty of opening and closing the second half-shell and the first half-shell.

[0008] Preferably, the locking device includes a latching element and a locking element that cooperate with each other; one of the latching element and the locking element is disposed on the first half shell and the other is disposed on the second half shell, so as to lock the second half shell in the closed state onto the first half shell.

[0009] Preferably, guide plates are formed on the inner walls of the first and second half-shells, and the guide plates extend along the axial direction of the corresponding half-shells. The guide plates can guide the mandrel to axially exit the corresponding half-shell, reducing the risk of scratches on the inner wall of the half-shell due to mandrel misalignment, and ensuring the smoothness and stability of mandrel demolding.

[0010] Preferably, reinforcing plates are symmetrically arranged on both sides of the guide plate, so as to form an internal reinforcing frame for the corresponding half-shell by means of the reinforcing plates and the guide plate, so as to avoid excessive deformation of the half-shell.

[0011] Preferably, the hinge is a sheet hinge; the first half-shell, the second half-shell, the sheet hinge, the connector, the buckle and the locking part are integrally injection molded by a set of injection molds, which can not only reduce the mold cost, but also eliminate the assembly process and improve the reliability and production efficiency of the medical handheld device.

[0012] Preferably, the outer wall of the handheld shell is provided with an anti-slip structure to prevent the user from slipping when holding it.

[0013] This utility model also provides an inner ear drug delivery device, including a catheter, a puncture needle, and the aforementioned medical handheld device; one end of the catheter has a catheter connector, and the other end of the catheter is sealed and inserted into the connector of the medical handheld device; the puncture needle includes a needle tip and a needle seat, and the puncture needle is detachably connected to the connector through the needle seat.

[0014] Preferably, the needle includes a first needle and a second needle; one end of the first needle is connected to the second needle, and the other end of the first needle is the puncture end; the outer diameter of the second needle is larger than the outer diameter of the first needle; this two-section needle design makes the needle more resistant to breakage compared with the traditional single-outer-diameter needle design.

[0015] As described above, the medical handheld device and inner ear drug delivery device of this utility model have the following beneficial effects:

[0016] 1) The medical handheld device of this application enables the detachable connection and conduction of the catheter and the puncture needle, so that the operator can use the medical handheld device to insert the puncture needle into the inner ear and connect the catheter with the inner ear. Compared with the traditional operation method of first puncturing to establish an insertion channel and then inserting the catheter into the inner ear through the insertion channel, the operation steps of this application are simpler and more convenient, with less trauma and effectively reducing the chance of wound infection.

[0017] 2) The handheld shell of this application includes a first half shell and a second half shell; since the first half shell and the connector are integrally formed, the positional accuracy of the handheld shell and the connector can be effectively guaranteed, avoiding the assembly error problem caused by the separate design of the two; in addition, since the second half shell can move to the open state, it is convenient to seal and insert one end of the catheter into the inner cavity of the connector in this state, effectively reducing the difficulty of catheter insertion and improving the convenience of operation; at the same time, after the second half shell is closed, it can constrain and fix part of the catheter segment in the inner cavity of the handheld shell, further improving the connection stability between the catheter and the medical handheld device, so as to prevent the catheter from being accidentally pulled out of the connector.

[0018] 3) The second half-shell is preferably rotatably connected to one side of the first half-shell by a plate hinge, and the second half-shell is preferably snapped together to the other side of the first half-shell by a matching snap fastener and locking element; in this way, the first half-shell, the second half-shell, the connector, the plate hinge, the snap fastener and the locking element can be integrally injection molded using a set of injection molds, which not only eliminates the assembly process, but also reduces the cost of mass production.

[0019] 4) The catheter connector can be connected to a micro-infusion pump or a manual syringe as needed, providing greater operational flexibility. Furthermore, the flexible catheter and connector design better adapts to the operating environment, allowing for drug delivery from the most suitable location, thus improving comfort and efficiency. Attached Figure Description

[0020] Figure 1 This is a first-person perspective stereoscopic view of a medical handheld device.

[0021] Figure 2 This is a stereoscopic view of a medical handheld device from a second-person perspective.

[0022] Figure 3 This is a vertical cross-sectional view of a medical handheld device.

[0023] Figure 4 This is a perspective view of the medical handheld device with the second housing open.

[0024] Figure 5 for Figure 4 Enlarged view of point A in the image.

[0025] Figure 6 This is an isometric sectional view of the medical handheld device with the second housing open.

[0026] Figure 7 This is a schematic diagram showing the engagement of the latching and locking components when the second housing is in the closed state.

[0027] Figure 8 This is an isometric sectional view of a medical handheld device in the second housing open state, according to another embodiment.

[0028] Figure 9 This is a 3D view of the connector.

[0029] Figure 10 This is a three-dimensional diagram of an inner ear drug delivery device.

[0030] Figure 11 Vertical cross-sectional view of the inner ear drug delivery device.

[0031] Figure 12 This is a vertical cross-sectional view of the puncture needle.

[0032] Explanation of reference numerals in the attached figures

[0033] Handheld shell 10, shell inner cavity 11, end opening 111, first half shell 12a, second half shell 12b, shell body 121, end plate 122, guide plate 123, reinforcing plate 124, recessed part 125, protruding part 126, hinge 13, fastener 14, cantilever part 141, locking head 142, locking part 15, anti-slip structure 16;

[0034] Connector 20, plug 21, tapered plug part 211, cylindrical plug part 212, connector shell 22, spiral 221, notch 222, connector inner cavity 23, connector tapered hole 231, connector cylindrical hole 232;

[0035] Catheter 30;

[0036] Puncture needle 40, needle tip 41, first needle tip 411, second needle tip 412, needle base 42, needle base conical hole 421, lug 422;

[0037] 50. Detailed Implementation

[0038] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0039] Please see Figures 1 to 12 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0040] This invention provides a medical handheld device that connects a catheter 30 and a puncture needle 40, allowing the user to directly administer medication to the inner ear by inserting the puncture needle 40 into the patient's inner ear using the handheld medical puncture device, effectively simplifying the procedure for administering medication to the inner ear.

[0041] like Figure 1 , Figure 2 , Figure 3 and Figure 11 As shown, the medical handheld device includes a handheld shell 10 and a connector 20 located at one end of the handheld shell 10; wherein, the connector 20 has a connector cavity 23 extending through it along its own axial direction, and the connector 20 can be detachably connected to the puncture needle 40; the handheld shell 10 has a shell cavity 11 communicating with the connector cavity 23, and the end of the handheld shell 10 away from the connector 20 is provided with an end opening 111 communicating with the shell cavity 11; one end of the catheter 30 is inserted into the handheld shell 10 through the end opening 111, and after passing through the shell cavity 11, it is press-fitted into the connector cavity 23 of the connector 20.

[0042] It should be noted that the method by which the catheter 30 is sealed and inserted into the inner cavity 23 of the connector includes, but is not limited to, the following two:

[0043] Method 1

[0044] The catheter 30 is first inserted into the inner cavity 23 of the connector with a gap. Then, glue is filled between the outer wall of the catheter 30 and the inner wall of the connector 23 to form an annular sealant, thereby preventing the liquid medicine flowing out of the catheter 30 from flowing into the handheld shell 10 through the gap between the catheter 30 and the inner cavity 23 of the connector, causing unnecessary waste.

[0045] Method 2

[0046] The catheter 30 is inserted into the inner cavity 23 of the connector with an interference fit to achieve a sealed connection between the two.

[0047] At this time, since the medical handheld device can be detachably connected to the puncture needle 40 and the catheter 30, the medical handheld device can be reused after disinfection.

[0048] For ease of description, in the following embodiments, the axial direction of the connector 20 is defined as the front-back direction, the height direction of the connector 20 is defined as the up-down direction, and the direction perpendicular to both the front-back and up-down directions is defined as the left-right direction; based on this, in Figure 3 and Figure 10 In the diagram, the right and left sides of the paper represent the front and back directions, the top and bottom sides represent the top and bottom directions, and the inside and outside sides represent the left and right directions.

[0049] To prevent the catheter 30 from interfering with the internal structure of the medical handheld device during insertion, such as Figure 1 and Figure 3 As shown, the end opening 111, the inner cavity 11 of the housing, and the inner cavity 23 of the connector are connected in a straight line in the axial direction of the connector 20 to ensure the smooth insertion of the conduit 30.

[0050] In an alternative embodiment, such as Figure 3 As shown, the inner cavity 23 of the connector includes a conical connector hole 231 and a cylindrical connector hole 232 that are coaxially connected. The conical connector hole 231 is used to guide the catheter 30 to be quickly and accurately inserted into the cylindrical connector hole 232 to prevent the catheter 30 from deviating during the insertion process.

[0051] It should be noted that in this application, the handheld case 10 can be any shape that is easy to hold, such as a pistol or pen (i.e., cylindrical), and there is no limitation on this; in this embodiment, the shape of the handheld case 10 is preferably set to pen.

[0052] It should be noted that the handheld shell 10 can be either an openable or closed structure, and there is no limitation on this. In order to reduce the assembly difficulty of the conduit 30 and the connector 20, in this embodiment, the handheld shell 10 preferably adopts an openable structure.

[0053] Specifically, such as Figures 1 to 4 As shown, the handheld housing 10 includes a first half-shell 12a and a second half-shell 12b; the first half-shell 12a is integrally formed with the connector 20 to avoid assembly error problems caused by the separate design of the two; the second half-shell 12b can move relative to the first half-shell 12a to switch between an open state and a closed state; when the second half-shell 12b is in the open state, it can provide an unobstructed operating space for the insertion of the catheter 30, which is conducive to quickly and accurately aligning the catheter 30 and inserting it into the inner cavity 23 of the connector; when the second half-shell 12a is in the closed state, the second half-shell 12b and the first half-shell 12a cooperate to form a housing inner cavity 11 and an end opening 111 for accommodating part of the catheter.

[0054] To prevent the catheter 30 from being accidentally pulled out of the connector 20, either the portion of the catheter located inside the first half-shell 12a can be fixed to the first half-shell 12a by means of adhesive or other methods before the second half-shell 12a is closed, so as to achieve secondary fixation of the catheter 30 and the medical handheld device; or the second half-shell 12b can be closed directly to clamp and fix the portion of the catheter inside the first half-shell 12a in the formed shell cavity 11.

[0055] It should be noted that the second half-shell 12b can be completely separated from the first half-shell 12a, or it can be rotatably connected to the first half-shell 12a via the hinge 13; there is no limitation on this.

[0056] In this embodiment, as Figure 1 As shown, the second half-shell 12b is rotatably connected to one side of the first half-shell 12a via a hinge 13, and the second half-shell 12b is detachably connected to the other side of the first half-shell 12a via a locking device.

[0057] It should be noted that the locking device includes, but is not limited to, various existing connection structures that can achieve relative fixation and release, such as snap-locking devices, magnetic locking devices, or bolt locking devices; in this embodiment, a snap-locking device is preferred.

[0058] The structure of the latch locking device is as follows Figure 2 , Figure 4 and Figure 5 As shown, it includes a latching member 14 and a locking member 15 that cooperate with each other; wherein, one of the latching member 14 and the locking member 15 is disposed on the first half shell 12a and the other is disposed on the second half shell 12b; when the second half shell 12b is in the closed state, the latching member 14 can deform and reset to engage with the corresponding locking member 15, thereby restricting the opening of the second half shell 12b.

[0059] Specifically, such as Figure 2 , Figure 4 , Figure 5 and Figure 7 As shown, the buckle 14 includes a cantilever portion 141 and a buckle head 142 located at the free end of the cantilever portion 141; the locking member 15 is a locking hole or a locking block.

[0060] The locking member 15 is a locking hole. When the second half shell 12b switches from the open state to the closed state, the half shell where the locking hole is located will press the locking head 142 of the corresponding latching member 14, so that the locking head 142 of the latching member 14 deflects inward until the locking head 142 reaches the corresponding locking hole. At this time, the locking head 142 resets and engages with the corresponding locking hole to restrict the opening of the second half shell 12b.

[0061] The locking member 15 is a locking block. When the second half shell 12b switches from the open state to the closed state, the locking block will squeeze the locking head 142 of the corresponding latching member 14, so that the locking head 142 of the latching member 14 deflects inward until the locking head 142 passes the corresponding locking block. At this time, the locking head 142 resets and locks with the corresponding locking block to restrict the opening of the second half shell 12b.

[0062] In an alternative embodiment, such as Figure 6 As shown, one of the first half-shell 12a and the second half-shell 12b is provided with a protrusion 126, and the other is provided with a recess 125; when the two half-shells are joined, the protrusion 126 and the recess 125 are inserted and engaged to ensure the joining accuracy of the two half-shells.

[0063] In a preferred embodiment, the medical handheld device is a one-piece injection molded part (i.e., integrally injection molded using a single injection mold). This not only eliminates the assembly step of the medical handheld device but also reduces the cost of mass production; at this time, such as Figure 1 and Figure 4 As shown, the hinge 13 is a molded sheet hinge; the first half shell 12a and the second half shell 12b both include a semi-cylindrical shell body 121 and a cover plate 122 located at the rear end of the shell body 121; the cover plate 122 is provided with a semi-circular groove or a U-shaped groove to form an end opening 111 of the handshake shell 10 when the two half shells are mated together.

[0064] Optionally, when the medical handheld device is a one-piece injection molded part, such as Figure 8 As shown, the cover plate 122 of the first half-shell 12a can be rotatably connected to the shell body 121 of the first half-shell 12a via a molded sheet hinge, and the cover plate 122 can be detachably connected to the corresponding shell body 121 via a snap-locking device. In this way, an internal slider injection mold can be used for injection molding of the medical handheld device, effectively improving the molding quality of the medical handheld device.

[0065] It should be noted that when the medical handheld device is a one-piece injection molded part, its material is one or more of various medical plastics such as polyethylene (PE), polypropylene (PP), or polycarbonate (PC), and there is no limitation on this.

[0066] It should be noted that when the medical handheld device is a one-piece injection molded part, the molded sheet hinge has one or two slits; the sheet hinge can be bent at the slits to adjust the angle between the two parts connected by the sheet hinge.

[0067] In an alternative embodiment, such as Figure 4 As shown, guide plates 123 are formed on the inner walls of the first half-shell 12a and the second half-shell 12b. The guide plates 123 extend along the axial direction of the corresponding half-shell. In this way, after the corresponding half-shell is injection molded, the guide plates 123 can guide the mandrel of the mold to exit the corresponding half-shell axially, reducing the risk of scratches on the inner wall of the half-shell caused by the mandrel misalignment, thereby ensuring the smoothness and stability of the mandrel demolding.

[0068] Furthermore, reinforcing plates 124 connected to the inner walls of the corresponding half-shells are symmetrically arranged on both sides of the guide plate 123; at this time, the reinforcing plates 124 and the guide plates 123 together constitute the internal reinforcing frame of the corresponding half-shells to increase the strength of the half-shells and prevent the half-shells from undergoing excessive deformation.

[0069] It should be noted that when the second half-shell 12b is mated with the first half-shell 12a, the internal reinforcing frames of the two half-shells enclose and form an axially extending receiving channel, which is used to receive the conduit 30 located in the inner cavity 11 of the shell.

[0070] In one optional embodiment, the inner diameter of the receiving channel is adapted to the outer diameter of the conduit 30 to constrain and fix the conduit 30 in the inner cavity 11 of the housing; of course, in other embodiments, the inner diameter of the receiving channel is larger than the outer diameter of the conduit 30. In this case, the conduit 30 can be fixed in the receiving channel by means of adhesive bonding, binding or other methods.

[0071] like Figure 1 As shown, the outer wall of the handheld shell 10 is provided with an anti-slip structure 16, which is an anti-slip protrusion or an anti-slip groove to prevent the medical handheld device from slipping during use.

[0072] like Figure 10 As shown, this application provides an inner ear drug delivery device, which includes a catheter 30, a puncture needle 40, and the aforementioned medical handheld device; wherein, one end of the catheter 30 is press-fitted into the connector 20 of the medical handheld device, and the other end of the catheter 30 is provided with a catheter connector 50; the catheter connector 50 can be detachably connected to a micro-infusion pump or directly detachably connected to a syringe; the puncture needle 40 includes a needle tip 41 and a needle seat 42, and the puncture needle 40 is detachably connected to the connector 20 through the needle seat 42.

[0073] It should be noted that a micro-infusion pump is an instrument that delivers fluid in a small, uniform, and continuous manner. It includes an actuator, a control mechanism, and a syringe (i.e., a drug storage device). Since micro-infusion pumps are existing technology, their specific structure will not be described in detail.

[0074] It should be noted that the catheter connector 50 is an existing female Luer connector, which can be leak-free connected to the male Luer connector on the micro-pump or syringe; since the female and male Luer connectors are existing structures, they will not be described in detail.

[0075] like Figure 12 As shown, the needle seat 42 of the puncture needle 42 is a female Luer connector, which has a conical needle seat hole 421 communicating with the needle tip 41, and the diameter of the conical needle seat hole 421 gradually increases radially towards the needle tip 41. At this time, the structure of the connector 20 is as follows... Figure 8 and Figure 10 As shown, it includes a plug portion 21 with a connector cavity 23, and the plug portion 21 includes a tapered plug portion 211 that mates with the tapered hole 421 of the pin seat. The two tapered surfaces are rubbed together to achieve sealing and fixation.

[0076] It should be noted that the taper of both the pin seat tapered hole 421 and the tapered plug portion 211 is 6%.

[0077] In an alternative embodiment, such as Figure 9 and Figure 11 As shown, the plug portion 21 also includes a cylindrical plug portion 212 coaxially fixed to the front end of the tapered plug portion 211; after the connector 20 and the needle seat 42 are assembled, the cylindrical plug portion 212 helps to reduce the remaining space in the tapered hole 421 of the needle seat, thereby reducing the residue of the medicine.

[0078] In addition, to prevent the pin holder 42 from being accidentally pulled apart from the connector 20, such as Figure 8 , Figure 10 and Figure 11 As shown, the outer wall of the needle holder 42 is provided with two symmetrically arranged lugs 422; the connector 20 includes a connecting shell 22 coaxially arranged with the conical plug portion 211. The inner wall of the connecting shell 22 is provided with an internal thread that mates with the lugs 422, so as to assist in locking through the thread engagement between the lugs 422 and the internal thread, thereby improving the safety of use.

[0079] In one embodiment, the internal thread of the connecting shell 22 is a single-thread thread.

[0080] In another embodiment, the internal thread of the connecting shell 22 is a double-threaded thread composed of two independent helices 221, wherein the phase angle difference between the two helices 221 is 180° (that is, one helice 221 rotates 180° and then coincides with the other helice 221); compared with the single-threaded thread, the double-threaded thread has a larger lead, which facilitates the quick connection between the connector 20 and the needle seat 42.

[0081] like Figure 9 As shown, when the internal thread of the connecting shell 22 consists of two independent helices 221, the outer wall of the connecting shell 22 is provided with notches 222 corresponding to each helice 221. The front wall of the notch 222 is coplanar with the rear wall of the corresponding helice 221. The notch 222 is used to accommodate mold inserts during the injection molding of the connecting shell 22, so that each mold insert can cooperate with the helical mandrel to define the cavity of the two helices, so that the connecting shell 22 and the two helices 221 on its inner wall can be injection molded in one step. Since the helical mandrel only involves axial movement and not rotational movement when it exits the mold during demolding, damage to the threads during rotational exit is effectively avoided, ensuring the quality of the threads.

[0082] In a preferred embodiment, such as Figure 12 As shown, the needle 41 includes a first needle 411 and a second needle 412; wherein, the outer diameter of the second needle 412 is larger than the outer diameter of the first needle 411, and one end of the first needle 411 is connected to the second needle 412, and the other end of the first needle 411 is the puncture end; this two-section needle design is more resistant to breakage than the traditional single first needle design.

[0083] In a further embodiment, the outer wall of the first needle 411 is provided with scale markings so that the user can control the puncture depth of the needle according to the scale markings, and avoid defects such as over-puncture or insufficient puncture depth.

[0084] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0085] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A medical handheld device for connecting a catheter (30) and a puncture needle (40); characterized in that, The medical handheld device includes a handheld shell (10) and a connector (20) located at one end of the handheld shell; the connector (20) has a through-hole connector cavity (23), and the handheld shell (10) has a shell cavity (11) communicating with the connector cavity (23); the connector (20) is used to detachably connect with the needle seat (42) of the puncture needle (40), and one end of the catheter (30) passes through the shell cavity (11) and is sealed and inserted into the connector cavity (23).

2. The medical handheld device according to claim 1, characterized in that, The handheld shell (10) includes a first half-shell (12a) and a second half-shell (12b), and the first half-shell (12a) is integrally formed with the connector (20); the second half-shell (12b) is movable relative to the first half-shell (12a) to switch between an open state and a closed state; when the second half-shell (12b) is in the closed state, the second half-shell (12b) and the first half-shell (12a) cooperate to form a shell cavity (11) for accommodating a portion of the conduit; the portion of the conduit located in the shell cavity (11) is constrained and fixed on the handheld shell (10).

3. A medical handheld device according to claim 2, characterized in that, The second half-shell (12b) is rotatably connected to one side of the first half-shell (12a) via a hinge (13), and the second half-shell (12b) is detachably connected to the other side of the first half-shell (12a) via a locking device.

4. A medical handheld device according to claim 3, characterized in that, The locking device includes a latching element (14) and a locking element (15) that cooperate with each other; one of the latching element (14) and the locking element (15) is disposed on the first half shell (12a) and the other is disposed on the second half shell (12b).

5. A medical handheld device according to claim 4, characterized in that, Guide plates (123) are formed on the inner walls of the first half-shell (12a) and the second half-shell (12b), and the guide plates (123) extend along the axial direction of the corresponding half-shell.

6. A medical handheld device according to claim 5, characterized in that, The guide plate (123) is symmetrically provided with reinforcing plates (124) on both sides.

7. A medical handheld device according to any one of claims 4 to 6, characterized in that, The hinge (13) is a sheet hinge; the first half shell (12a), the second half shell (12b), the sheet hinge, the connector (20), the buckle (14) and the locking part (15) are integrally injection molded by a set of injection molds.

8. A medical handheld device according to any one of claims 1 to 6, characterized in that, The outer wall of the handheld shell (10) is provided with an anti-slip structure (16).

9. An inner ear drug delivery device, characterized in that, The device includes a catheter (30), a puncture needle (40), and a medical handheld device as described in any one of claims 1 to 8; one end of the catheter (30) has a catheter connector (50), and the other end of the catheter (30) is sealed and inserted into the connector (20) of the medical handheld device; the puncture needle (40) includes a needle tip (41) and a needle seat (42), and the puncture needle (40) is detachably connected to the connector (20) through the needle seat (42).

10. An inner ear drug delivery device according to claim 9, characterized in that, The needle (41) includes a first needle (411) and a second needle (412); one end of the first needle (411) is connected to the second needle (412), and the other end of the first needle (411) is the puncture end; the outer diameter of the second needle (412) is larger than the outer diameter of the first needle (411).

Images