Medical handheld device and inner ear administration device

Abstract

The invention provides a medical handheld device and an inner ear administration device. The medical handheld device comprises a handheld shell and a connector located at one end of the handheld shell. The connector is provided with a connector inner cavity arranged in a penetrating mode, and the handheld shell is provided with a shell inner cavity communicated with the connector inner cavity. The connector is used for being detachably connected with a needle base of a puncture needle, and a connector inner cavity of the connector is used for allowing a catheter to be inserted in a sealed mode. Therefore, an operator only needs to insert the puncture needle into the inner ear with the help of the medical handheld device, direct administration of the inner ear can be conducted, only one-time insertion operation exists in the whole process, the operation process is effectively simplified, and operation convenience is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a medical handheld device and an inner ear drug delivery device. Background Art

[0002] Inner ear diseases such as tinnitus and hearing loss are diseases characterized by recurrent, paroxysmal, and episodic vertigo, hearing loss, and tinnitus. Inner ear drug delivery technology is generally used to treat inner ear diseases. Current inner ear drug delivery technologies include tympanic cavity delivery and direct inner ear delivery. Among them, tympanic cavity delivery is to deliver the drug directly to the tympanic cavity of the middle ear, so that the drug diffuses and penetrates into the inner ear through the round window membrane, realizing indirect inner ear delivery; while direct inner ear delivery is to deliver the drug directly into the inner ear. Due to the uncontrollable nature of drug diffusion during tympanic cavity delivery, it is difficult to ensure that a sufficient amount of drug enters the inner ear, affecting the treatment effect. Therefore, direct inner ear delivery has been widely used.

[0003] Direct drug delivery to the inner ear is typically performed using a syringe and a catheter connected to a micropump. The syringe relies on manual operation during injection, making it difficult to precisely control the dosage in microliter or even nanoliter inner ear drug delivery scenarios, which can affect efficacy or cause adverse reactions. While the catheter connected to the micropump enables precise drug delivery, its flexibility makes it difficult to directly pierce the round window membrane and insert into the inner ear. Therefore, the current practice is to first puncture the round window membrane with a puncture tool to establish an insertion channel, then align the catheter with the established insertion channel and insert it into the inner ear along the insertion channel. The entire process requires two insertion operations, which can be time-consuming and inconvenient. Summary of the Invention

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a medical handheld device and an inner ear drug delivery device. The medical handheld device is used to achieve detachable connection and conduction between the catheter and the puncture needle, so that the operator only needs to insert the puncture needle into the inner ear with the help of the medical handheld device to stably deliver the drug into the inner ear, effectively simplifying the operation process and improving the convenience of operation.

[0005] To achieve the above-mentioned objectives and other related objectives, the present invention provides a medical handheld device for connecting a catheter and a puncture needle; the medical handheld device includes a handheld shell and a connector located at one end of the handheld shell; the connector has a connector inner cavity provided therethrough, and the handheld shell has a shell inner cavity connected to the connector inner cavity; the connector is used to be detachably connected to the needle seat of the puncture needle, and one end of the catheter is sealed and inserted into the connector inner cavity after passing through the shell inner cavity; in this way, the operator only needs to use the medical handheld device to insert the puncture needle into the inner ear to perform direct drug administration to the inner ear. The entire process only involves one insertion operation, which effectively simplifies the operating process and improves operational convenience.

[0006] Preferably, the handheld shell includes a first half shell and a second half shell, and the first half shell and the connecting head are integrally formed; the second half shell can move 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 cooperates with the first half shell to form a shell inner cavity for accommodating part of the catheter; part of the catheter located in the shell inner cavity is constrained and fixed on the handheld shell; since the present application can seal and insert one end of the catheter into the connector inner cavity of the connecting connector when the second half shell is open, the difficulty of inserting the catheter is effectively reduced and the convenience of assembly is improved; at the same time, the shell inner cavity formed after the second half shell is closed can also constrain and fix the catheter to prevent the catheter assembled in the connector inner cavity from being accidentally pulled out of the connecting connector, thereby ensuring the connection stability during use.

[0007] Preferably, the second half shell is rotatably connected to one side of the first half shell by a hinge, and the second half shell is detachably connected to the other side of the first half shell by a locking device, which not only avoids the loss of the second half shell, 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 latch and a locking member that cooperate with each other; one of the latch and the locking member is arranged on the first half shell, and the other is arranged on the second half shell, so as to lock the second half shell in the closed state on the first half shell.

[0009] Preferably, guide plates are formed on the inner walls of the first and second half shells, extending axially along the corresponding half shells. The guide plates can guide the mandrel axially out of the corresponding half shell, reducing the risk of scratching the inner walls of the half shells due to mandrel deflection, and ensuring smooth and stable demolding of the mandrel.

[0010] Preferably, reinforcing plates are symmetrically provided on both sides of the guide plate, so that the reinforcing plates and the guide plates form an internal reinforcing frame of the corresponding half shell 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 snap fastener and the locking member are integrally injection molded through a set of injection molds, which not only reduces the mold cost, but also eliminates the assembly process, thereby improving the reliability and production efficiency of the medical handheld device.

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

[0013] The present invention also provides an inner ear drug delivery device, comprising a catheter, a puncture needle and the above-mentioned 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 comprises a needle head and a needle seat, and the puncture needle is detachably connected to the connector via 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 a puncture end; the outer diameter of the second needle is larger than the outer diameter of the first needle; this two-stage needle design has stronger anti-breakage ability compared with the traditional single outer diameter needle design.

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

[0016] 1) The medical handheld device of the present application can realize 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, so that the catheter and the inner ear are connected; 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 the present application are simpler and more convenient, and the trauma is less, effectively reducing the chance of wound infection.

[0017] 2) The handheld shell of the present 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 be moved to an open state, it is convenient to seal and insert one end of the catheter into the connector cavity of the connector in this state, effectively reducing the difficulty of inserting the catheter and improving the operational convenience; at the same time, after the second half shell is closed, part of the catheter section can be constrained and fixed in the shell cavity of the handheld shell, further improving the connection stability of 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 sheet hinge, and the second half shell is preferably snap-connected to the other side of the first half shell by cooperating snap members and locking members; in this way, the first half shell, the second half shell, the connecting head, the sheet hinge, the snap members and the locking members 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 micropump or a manual syringe as needed, providing greater operational flexibility. Furthermore, the flexible catheter and catheter connector design better adapt to the operating environment, allowing for optimal dosing at the most appropriate location, enhancing comfort and rationality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional image of the medical handheld device from a first perspective.

[0021] Figure 2 It is a three-dimensional image of the medical handheld device from a second viewing angle.

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

[0023] Figure 4 This is a three-dimensional view of the medical handheld device with the second shell opened.

[0024] Figure 5 for Figure 4 A in the enlarged view.

[0025] Figure 6 It is an isometric cross-sectional view of the medical handheld device with the second shell opened.

[0026] Figure 7 It is a schematic diagram of the cooperation between the latching member and the locking member when the second housing is in the closed state.

[0027] Figure 8 FIG1 is an isometric cross-sectional view of another embodiment of a medical handheld device with the second shell opened.

[0028] Figure 9 A perspective view of the connector.

[0029] Figure 10 A three-dimensional diagram of the inner ear drug delivery device.

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

[0031] Figure 12 A vertical cross-sectional view of the puncture needle.

[0032] Description of Reference Numerals

[0033] Handheld housing 10, housing cavity 11, end opening 111, first half shell 12a, second half shell 12b, housing body 121, end plate 122, guide plate 123, reinforcement plate 124, recessed portion 125, raised portion 126, hinge 13, latch 14, cantilever portion 141, latch head 142, locking member 15, anti-slip structure 16;

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

[0035] catheter 30;

[0036] Puncture needle 40, needle 41, first needle 411, second needle 412, needle hub 42, needle hub tapered hole 421, lug 422;

[0037] Catheter connector 50. DETAILED DESCRIPTION

[0038] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0039] See also Figures 1 to 12 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0040] The present invention provides a medical handheld device that can connect a catheter 30 and a puncture needle 40, so that a user can directly administer medicine to the inner ear by inserting the puncture needle 40 into the inner ear of a patient with the help of the medical handheld puncture device, thereby effectively simplifying the operation steps of the inner ear drug administration.

[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 inner cavity 23 arranged 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 inner cavity 11 connected to the connector inner cavity 23, and the end of the handheld shell 10 away from the connector 20 is provided with an end opening 111 connected to the shell inner cavity 11; one end of the catheter 30 is inserted into the handheld shell 10 from the end opening 111, and after passing through the shell inner cavity 11, it is interference-sealed and inserted into the connector inner cavity 23 of the connector 20.

[0042] It should be noted that the manners in which the conduit 30 is sealed and inserted into the connector inner cavity 23 include but are not limited to the following two:

[0043] Method 1

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

[0045] Method 2

[0046] The conduit 30 is interference-fitted into the inner cavity 23 of the joint 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 being sterilized.

[0048] For the convenience of description, in the following embodiments, the axial direction of the connector 20 is defined as the front-to-back direction, the height direction of the connector 20 is defined as the up-down direction, and the direction perpendicular to both the front-to-back direction and the up-down direction is defined as the left-to-right direction. Figure 3 and Figure 10 In the figure, the right side and the left side of the paper are the front direction and the rear direction respectively, the upper side and the lower side of the paper are the upper direction and the lower direction respectively, and the inner side and the outer side of the paper are the left direction and the right direction respectively.

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

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

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

[0052] It should be noted that the handheld shell 10 is an openable structure or a non-openable structure, which is not limited to this; in order to reduce the difficulty of assembling the catheter 30 and the connector 20, in this embodiment, the handheld shell 10 preferably adopts an openable structure.

[0053] Specifically, if Figures 1 to 4As shown, the handheld shell 10 includes a first half shell 12a and a second half shell 12b; the first half shell 11a and the connector 20 are integrally formed to avoid assembly errors 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 operation of the catheter 30, which is conducive to quickly and accurately aligning and inserting the catheter 30 into the connector cavity 23; when the second half shell 12a is in the closed state, the second half shell 12b cooperates with the first half shell 12a to form a shell cavity 11 and an end opening 111 for accommodating part of the catheter.

[0054] In order to prevent the catheter 30 from being accidentally pulled out of the connecting joint 20, before the second half shell 12a is closed, the part of the catheter located in the first half shell 12a can be fixed to the first half shell 12a by gluing or other means to achieve secondary fixation of the catheter 30 and the medical handheld device; or the second half shell 12b can be directly closed to clamp and fix the part of the catheter in 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 can be rotatably connected to the first half shell 12a via the hinge 13, which is not limited to this.

[0056] In this embodiment, if 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 of fixation, such as a snap locking device, a magnetic locking device, or a bolt locking device, and there is no limitation on this; in this embodiment, the locking device preferably adopts a snap locking device.

[0058] The structure of the buckle locking device is as follows Figure 2 、 Figure 4 and Figure 5 As shown, it includes a latch 14 and a locking member 15 that cooperate with each other; wherein, one of the latch 14 and the locking member 15 is provided on the first half shell 12a, and the other is provided on the second half shell 12b; when the second half shell 12b is in a closed state, the latch 14 can be deformed and reset to be snap-connected with the corresponding locking member 15, thereby limiting the opening of the second half shell 12b.

[0059] Specifically, if Figure 2 、 Figure 4 、 Figure 5 and Figure 7As shown, the latch 14 includes a cantilever portion 141 and a clamping portion 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 squeeze the corresponding clamping head 142 of the fastener 14, so that the clamping head 142 of the fastener 14 deflects inward until the clamping head 142 reaches the corresponding locking hole; at this time, the clamping head 142 is reset and engaged with the corresponding locking hole to limit 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 clamping head 142 of the corresponding latch 14, so that the clamping head 142 of the latch 14 deflects inward until the clamping head 142 passes over the corresponding locking block; at this time, the clamping head 142 is reset and locked with the corresponding locking block to limit the opening of the second half shell 12b.

[0062] In an alternative embodiment, if 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 docked, the protrusion 126 and the recess 125 are plugged into each other to ensure the docking accuracy of the two half shells.

[0063] In a preferred embodiment, the medical handheld device is an integral injection molded part (i.e., it is integrally molded by a set of injection molds), which not only eliminates the assembly process of the medical handheld device but also reduces the cost of mass production. 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 docked.

[0064] Optionally, when the medical handheld device is an integral injection molded part, such as Figure 8 As shown, the cover 122 of the first half shell 12a can be rotatably connected to the body 121 of the first half shell 12a via a molded plate hinge, and the cover 122 can be detachably connected to the corresponding body 121 via a snap-fit ​​locking device. In this way, an inner-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 an integral 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 an integral injection molded part, the molded sheet hinge has one or two slits; the sheet hinge can be bent at the slit to adjust the angle between the two parts connected by the sheet hinge.

[0067] In an alternative embodiment, if Figure 4 As shown, a guide plate 123 is formed on the inner wall of the first half shell 12a and the second half shell 12b, and the guide plate 123 extends along the axial direction of the corresponding half shell; in this way, after the corresponding half shell is injection molded, the guide plate 123 can be used to guide the core shaft of the mold to axially exit the corresponding half shell, thereby reducing the risk of scratches on the inner wall of the half shell caused by the deflection of the core shaft, thereby ensuring the smoothness and stability of the core shaft 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 shell to increase the strength of the half shell and prevent the half shell from excessive deformation.

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

[0070] In an optional implementation, the inner diameter of the accommodating channel is adapted to the outer diameter of the catheter 30 to constrain and fix the catheter 30 in the shell cavity 11; of course, in other embodiments, the inner diameter of the accommodating channel is larger than the outer diameter of the catheter 30. In this case, the catheter 30 can be fixed in the accommodating channel by gluing, tying, etc.

[0071] like Figure 1 As shown, an anti-skid structure 16 is provided on the outer wall of the handheld shell 10. The anti-skid structure 16 is an anti-skid protrusion or an anti-skid groove to prevent the medical handheld device from slipping when in use.

[0072] like Figure 10 As shown, the present application provides an inner ear drug delivery device, which includes a catheter 30, a puncture needle 40 and the above-mentioned medical handheld device; wherein, one end of the catheter 30 is interference-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 micropump or directly detachably connected to a syringe; the puncture needle 40 includes a needle 41 and a needle seat 42, and the puncture needle 40 is detachably connected to the connector 20 via the needle seat 42.

[0073] It should be noted that a micro pump is an instrument that outputs a small amount of fluid evenly and continuously, and includes an actuator, a control mechanism and a syringe (i.e., a drug storage device); since the micro pump belongs to the existing technology, its 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 connected to the male Luer connector on the micro pump or syringe without leakage; since the female Luer connector and the male Luer connector are existing structures, they are not 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 needle seat tapered hole 421 connected to the needle head 41, and the diameter of the needle seat tapered hole 421 gradually increases in the direction close to the needle head 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 inner cavity 23, and the plug portion 21 includes a tapered plug portion 211 that matches the tapered hole 421 of the needle seat, and the sealing and fixation of the two are achieved through the friction of the two tapered surfaces.

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

[0077] In an alternative embodiment, if 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; when 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 achieving the purpose of reducing the residual liquid medicine.

[0078] In addition, in order to prevent the needle seat 42 and the connector 20 from being accidentally pulled apart, Figure 8 、 Figure 10 and Figure 11 As shown, two symmetrically arranged lugs 422 are provided on the outer wall of the needle seat 42; the connector 20 includes a connecting shell 22 coaxially arranged with the tapered plug portion 211, and an internal thread that cooperates with the lugs 422 is provided on the inner wall of the connecting shell 22, so as to assist in locking through the threaded cooperation between the lugs 422 and the internal thread, thereby improving safety in 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-thread thread composed of two independent helices 221, wherein the phase angle difference between the two helices 221 is 180° (i.e., one helical body 221 rotates 180° and overlaps with the other helical body 221); compared with the single-thread thread, the double-thread thread has a larger lead, which facilitates the quick connection of the connector 20 and the needle seat 42.

[0081] like Figure 9 As shown, when the internal thread of the connecting shell 22 is composed of two independent spirals 221, a notch 222 corresponding to each spiral 221 is provided on the outer wall of the connecting shell 22, and the front wall of the notch 222 is coplanar with the rear wall of the corresponding spiral 221. The notch 222 is used to accommodate the mold insert during the injection molding of the connecting shell 22, so that each mold insert cooperates with the spiral mandrel to define a cavity for the two spirals, so that the connecting shell 22 and the two spirals 221 on its inner wall can be injection molded at one time. Because the spiral mandrel only moves axially and not rotationally when it is withdrawn during demolding, damage to the thread during rotational withdrawal is effectively avoided, ensuring the quality of the thread.

[0082] In a preferred embodiment, if 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 a puncture end; compared with the traditional single first needle design, this two-stage needle design is not only more resistant to breakage.

[0083] In a further embodiment, scale marks are provided on the outer wall of the first needle 411 so that the user can control the puncture depth of the needle according to the scale marks to avoid defects such as excessive puncture or insufficient puncture depth.

[0084] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0085] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

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

2. A medical handheld device according to claim 1, characterized in that: The handheld shell (10) comprises a first half shell (12a) and a second half shell (12b), and the first half shell (11a) and the connector (20) are integrally formed; 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 closed state, the second half shell (12b) cooperates with the first half shell (12a) to form a shell cavity (11) for accommodating a portion of the catheter; the portion of the catheter 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 comprises a latch (14) and a locking member (15) that cooperate with each other; one of the latch (14) and the locking member (15) is arranged on the first half shell (12a), and the other is arranged 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 shells.

6. A medical handheld device according to claim 5, characterized in that: Reinforcement plates (124) are symmetrically provided on both sides of the guide plate (123).

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 snap-fitting part (14) and the locking part (15) are integrally injection-molded through a set of injection molds.

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

9. An inner ear drug delivery device, characterized in that: The invention comprises a catheter (30), a puncture needle (40) and a medical handheld device according to any one of claims 1 to 8; one end of the catheter (30) is provided with a catheter connector (50), and the other end of the catheter (30) is sealed and inserted into a connector (20) of the medical handheld device; the puncture needle (40) comprises a needle head (41) and a needle seat (42), and the puncture needle (40) is detachably connected to the connector (20) via the needle seat (42).

10. The inner ear drug delivery device according to claim 9, characterized in that: The needle (41) comprises 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 a puncture end; the outer diameter of the second needle (412) is greater than the outer diameter of the first needle (411).

Images