Injection needle assembly

Abstract

The utility model relates to medical equipment technical field provides an injection needle head subassembly. The injection needle head subassembly can include: injection needle head, the injection needle head includes fixedly connected needle stem and base, the stretchable bellows, the bellows cover sets in the circumferential outside of injection needle head, the bellows includes the first end close to needle stem and the second end away from needle stem, the second end is connected with base swing, wherein, the bellows includes first state and second state, when the bellows is in first state, the bellows cover sets in the circumferential outside of base, the needle stem is exposed to the bellows, when the bellows is in second state, the bellows cover sets in the circumferential outside of needle stem, the needle stem is located in the bellows. According to the injection needle head subassembly provided in this embodiment, the possibility of infection of medical staff can be reduced.

Description

Technical Field

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

[0002] The existing disposable injection needles for dentistry (specifically for Bilan anesthesia) have the entire needle exposed after the cap is opened. After the patient is injected with the anesthetic, when the needle cap is replaced, the medical staff need to first use one hand to lift the needle cap with the needle tip, and then use both hands to replace the needle cap. Many medical staff sometimes find it inconvenient to replace the needle cap during the operation and can only leave the needle tip exposed in the operating tray.

[0003] During oral surgery, if the patient's condition requires additional anesthetic, the anesthetic needle must be exposed on the operating table between the initial and subsequent injections, posing a risk of accidental contact to medical staff and significantly increasing their occupational exposure risk. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the present invention provides an injection needle assembly.

[0005] This application provides an injection needle assembly, which may include: an injection needle, the injection needle including a needle shaft and a base fixedly connected; and a stretchable bellows, the bellows being sleeved on the circumferential outer side of the injection needle, the bellows including a first end near the needle shaft and a second end away from the needle shaft, the second end being movably connected to the base; wherein the bellows includes a first state and a second state, when the bellows is in the first state, the bellows covers the circumferential outer side of the base, and the needle shaft is exposed in the bellows; when the bellows is in the second state, the bellows covers the circumferential outer side of the needle shaft, and the needle shaft is located inside the bellows.

[0006] In this way, the corrugated tube can protect the needle shaft between multiple injections of anesthetic by the doctor, preventing accidental puncture and reducing the risk of infection for medical staff, as well as occupational exposure risk.

[0007] In some embodiments of this application, the outer peripheral surface of the base is provided with a first slide rail, which extends along the needle bar toward the base; the injection needle assembly further includes: a first connecting post, which includes a first slider and a first connecting rod connected together, the second end of which is connected to the first connecting rod, the first slider slidingly engaging with the first slide rail, and the first slider being able to slide in the extending direction of the first slide rail.

[0008] In some embodiments of this application, the outer peripheral surface of the base is provided with a second slide rail, the second slide rail extends along the direction of the injection needle toward the base, and the second slide rail and the first slide rail are spaced apart in the circumferential direction of the base; the injection needle assembly further includes: a second connecting post, the second connecting post includes a second slider and a second connecting rod connected together, the second end is connected to the second connecting rod, the second slider is slidably engaged with the second slide rail, and the second slider can slide in the extension direction of the second slide rail.

[0009] In some embodiments of this application, the first slide rail and the second slide rail are symmetrically arranged about the central axis of the needle bar; the first connecting post and the second connecting post are symmetrically arranged about the central axis of the needle bar.

[0010] In some embodiments of this application, the injection needle assembly further includes: a cover plate located on the side where the first end of the bellows is located, the first end being connected to the cover plate, the cover plate having a through hole through which the needle shaft passes.

[0011] In some embodiments of this application, the orthographic projection of the base onto the cover plate is located within the cover plate.

[0012] In some embodiments of this application, the base is provided with a first receiving cavity having a first opening facing the needle bar; the injection needle assembly further includes: a first elastic member disposed in the first receiving cavity, one end of the first elastic member being connected to the cover plate and the other end being connected to the bottom wall of the first receiving cavity, the first elastic member always applying a pushing force away from the base to the cover plate.

[0013] In some embodiments of this application, the cover plate has a first protrusion on the side facing the opening, the first protrusion can extend into the first receiving cavity through the first opening, and the first protrusion has a first locking part; the inner wall of the first receiving cavity has a second locking part, and the first locking part and the second locking part lock together.

[0014] In some embodiments of this application, the first locking part is a first locking post, one end of which is disposed on the outer peripheral surface of the first protrusion; the second locking part is a first locking track, which includes a connected vertical track and a horizontal track, the vertical track extending to the upper end surface of the base, and the first locking post slidingly engaging with the first locking track.

[0015] In some embodiments of this application, the base is provided with a second receiving cavity having a second opening facing the needle bar, and the second receiving cavity and the first receiving cavity are circumferentially spaced on the base; the injection needle assembly further includes: a second elastic member, the second elastic member being disposed in the second receiving cavity, one end of the second elastic member being connected to the cover plate, and the other end being connected to the bottom wall of the second receiving cavity, and the second elastic member always applying a pushing force away from the base to the cover plate. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of an injection needle assembly provided in some embodiments of this application;

[0019] Figure 2 for Figure 1 A cross-sectional view of the injection needle assembly shown;

[0020] Figure 3 for Figure 1 The diagram shows the injection needle assembly in its second state;

[0021] Figure 4 for Figure 3 A schematic diagram of the first slide rail shown;

[0022] Figure 5 for Figure 3 The diagram shows the first locking pin located on the vertical track.

[0023] Figure 6 for Figure 3 The diagram shows the first locking pin located on the transverse track.

[0024] Figure label:

[0025] 100. Injection needle assembly;

[0026] 110. Needle bar;

[0027] 120. Base; 121. First slide rail; 122. Second slide rail; 123. First receiving cavity; 124. Second receiving cavity; 125. First locking rail; 1251. Vertical rail; 1252. Horizontal rail;

[0028] 130. Bellows; 131. First end; 132. Second end;

[0029] 140. First connecting post;

[0030] 150. Second connecting post;

[0031] 160. Cover plate; 161. Through hole; 162. First protrusion; 163. Second protrusion; 164. First locking pin;

[0032] 170. First elastic element;

[0033] 180. Second elastic element. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0036] The existing disposable injection needles for dentistry (specifically for Bilan anesthesia) have the entire needle exposed after the cap is opened. After administering the anesthetic to the patient, when recapping the needle, medical staff need to first use one hand to lift the cap with the needle tip and then use both hands to recap it. Many medical staff sometimes find this inconvenient and can only leave the needle exposed in the operating tray.

[0037] During oral surgery, patients may require additional anesthetic treatment due to their condition. Between the initial and subsequent injections, the anesthetic needle is exposed on the operating table, posing a risk of accidental puncture and infection to the surgeon, significantly increasing the occupational exposure risk for healthcare workers.

[0038] To resolve the above technical issues, please refer to Figures 1 to 6 This application provides an injection needle assembly 100, which may include an injection needle and a bellows 130.

[0039] Please refer to Figures 1 to 3The injection needle includes a needle shaft 110 and a base 120. The needle shaft 110 includes an insertion end and a connecting end, the connecting end being connected to the base 120. The insertion end is used to pierce the patient's skin. The base 120 is provided with a threaded hole, the opening of which is located away from the needle shaft 110. The threaded hole is used to connect to a syringe.

[0040] The bellows 130 is a stretchable tubular structure. The bellows 130 is sleeved on the circumferential outer side of the injection needle. The bellows 130 includes a first end 131 near the needle bar 110 and a second end 132 away from the needle bar 110. The second end 132 is movably connected to the base 120.

[0041] Among them, the bellows 130 includes a first state (e.g. Figure 2 The bellows shown in the diagram represents the first state and the second state (e.g., the second state). Figure 3 (The bellows shown in the diagram) When the bellows 130 is in the first state, the bellows 130 covers the circumferential outer side of the base 120, and the needle bar 110 is exposed to the bellows 130. When the bellows 130 is in the second state, the bellows 130 covers the circumferential outer side of the needle bar 110, and the needle bar 110 is located inside the bellows 130.

[0042] It should be noted that during the use of the injection needle assembly 100, in the initial state, that is, after the doctor opens the outer packaging of the injection needle assembly 100, the bellows 130 is in the first state. After the doctor assembles the injection needle assembly 100 into the syringe, the doctor can give the patient the first injection of anesthetic. After the first injection of anesthetic, the doctor adjusts the bellows 130 from the first state to the second state, so that the needle shaft 110 is under the protection of the bellows 130. Then the injection needle assembly 100 is placed on the sterile cloth. When the doctor needs to give the patient a second or multiple injections of anesthetic, the bellows 130 is adjusted from the second state to the first state.

[0043] In this way, during the time between multiple injections of anesthetic by the doctor, the corrugated tube 130 can protect the needle shaft 110, preventing the doctor from accidentally touching it and causing puncture, reducing the risk of infection for the doctor, and reducing the occupational exposure risk for medical staff.

[0044] In some embodiments of this application, please refer to Figures 2 to 4 The base 120 has a first slide rail 121 on its outer peripheral surface. The first slide rail 121 extends along the needle bar 110 toward the base 120. The injection needle assembly 100 also includes a first connecting post 140. The first connecting post 140 includes a first slider and a first connecting rod connected together. The second end 132 is connected to the first connecting rod. The first slider is slidably engaged with the first slide rail 121. The first slider can slide in the extending direction of the first slide rail 121.

[0045] In this way, by setting the first slide rail 121 and the first slider in a sliding fit, the stability of the bellows 130 in adjusting and switching between the first state and the second state can be guaranteed, that is, the stability of the bellows 130 in the stretching and compression process.

[0046] For details, please refer to Figure 4 The first slide rail 121 is formed as a slide groove. In the depth direction of the slide groove, the slide groove includes a first groove segment and a second groove segment. The first groove segment is connected to the opening of the slide groove. The width of the first groove segment is smaller than the width of the second groove segment. The first slider is located in the second groove segment. The width of the first slider is greater than the width of the first groove segment and smaller than the width of the second groove segment.

[0047] This enables the interaction and cooperation between the first connecting rod and the first slide rail 121.

[0048] Furthermore, a second slide rail 122 is provided on the outer peripheral surface of the base 120. The second slide rail 122 extends along the direction of the injection needle toward the base 120, and the second slide rail 122 and the first slide rail 121 are spaced apart in the circumferential direction of the base 120. The injection needle assembly 100 also includes a second connecting post 150, which includes a connected second slider and a second connecting rod. The second end 132 is connected to the second connecting rod. The second slider is slidably engaged with the second slide rail 122, and the second slider can slide in the extending direction of the second slide rail 122.

[0049] In this way, by setting the first slide rail 121 and the first connecting post 150 to cooperate with each other, and the second slide rail 122 and the second connecting post 150 to cooperate with each other, the stability of the bellows 130 during the stretching and compression process can be further guaranteed.

[0050] The second connecting post 150 can have the same structure as the first connecting post 140, and the second slide rail 122 can have the same structure as the first slide rail 121.

[0051] Furthermore, the first slide rail 121 and the second slide rail 122 are symmetrically arranged about the central axis of the needle bar 110, and the first connecting post 140 and the second connecting post 150 are symmetrically arranged about the central axis of the needle bar 110. This further ensures the stability of the bellows 130 during stretching and compression.

[0052] Please refer to some embodiments of this application. Figure 2 and Figure 3 The injection needle assembly 100 also includes a cover plate 160, which is located on the side where the first end 131 of the bellows 130 is located. The first end 131 is connected to the cover plate 160. The cover plate 160 is provided with a through hole 161, through which the needle bar 110 passes.

[0053] It should be noted that by setting the cover plate 160, when the bellows 130 is in the second state, the cover plate 160 can cover the first end 131 of the bellows 130, and further cover the needle bar 110 in the space enclosed by the bellows 130 and the cover plate 160, so as to prevent the doctor from accidentally touching the insertion end of the needle bar 110 and reduce the possibility of the doctor being infected.

[0054] Furthermore, the orthographic projection of the base 120 onto the cover plate 160 is located within the cover plate 160. That is, the radial dimension of the cover plate 160 is larger than the radial dimension of the cover plate 160, which facilitates the doctor to switch the bellows 130 between the first and second states by pushing and pulling the cover plate 160.

[0055] Please refer to some embodiments of this application. Figure 2 and Figure 3 The base 120 is provided with a first receiving cavity 123 with a first opening facing the needle bar 110. The injection needle assembly 100 also includes a first elastic element 170, which is disposed in the first receiving cavity 123. One end of the first elastic element 170 is connected to the cover plate 160, and the other end is connected to the bottom wall of the first receiving cavity 123. The first elastic element 170 always applies a pushing force away from the base 120 to the cover plate 160.

[0056] Therefore, by setting the first elastic element 170, the bellows 130 can be provided with the power to adjust from the first state to the second state, so as to realize the bellows 130 switching from the first state to the second state.

[0057] For further information, please refer to [link / reference]. Figure 2 and Figure 3 The cover plate 160 has a first protrusion 162 on the side facing the opening. The first protrusion 162 can extend into the first receiving cavity 123 through the first opening. The first protrusion 162 has a first locking part. The inner wall of the first receiving cavity 123 has a second locking part, and the first locking part and the second locking part lock together.

[0058] Therefore, by setting the first locking part and the second locking part, when the bellows 130 is in the first state, the first locking part and the second locking part are locked, which can keep the bellows 130 in the first state, making it convenient for doctors to inject anesthetic. When it is necessary to switch the bellows 130 from the first state to the second state, it is only necessary to unlock the first locking part and the second locking part. Under the action of the first elastic member 170, the bellows 130 switches from the first state to the second state.

[0059] Specifically, the first locking part is a first locking pin 164, one end of which is located on the outer peripheral surface of the first protrusion 162. The second locking part is a first locking track 125, which includes a vertical track 1251 and a horizontal track 1252 connected together. The vertical track 1251 extends to the upper end surface of the base 120. The first locking pin 164 and the first locking track 125 are slidably engaged.

[0060] The first locking rail 125 has the same structure as the first slide rail 121, and the first locking pin 164 has the same structure as the first connecting rod. The first locking pin 164 moves downward first, so that the free end of the first locking pin 164 moves from the vertical rail 1251 to the horizontal rail 1252. Then, the cover plate 160 is rotated so that the free end of the first locking pin 164 is located in the horizontal rail 1252 and is offset from the vertical rail 1251, thereby limiting the cover plate 160 in the vertical direction.

[0061] When unlocking, the doctor only needs to rotate the cover plate 160 in the opposite direction so that the free end of the first locking pin 164 enters the vertical track 1251. Under the action of the first elastic element 170, the bellows 130 switches between the first state and the second state.

[0062] Furthermore, the base 120 is provided with a second receiving cavity 124 having a second opening facing the needle bar 110. The second receiving cavity 124 and the first receiving cavity 123 are circumferentially spaced apart from each other on the base 120. The injection needle assembly 100 may also include a second elastic member 180, which is disposed in the second receiving cavity 124. One end of the second elastic member 180 is connected to the cover plate 160, and the other end is connected to the bottom wall of the second receiving cavity 124. The second elastic member 180 always applies a pushing force to the cover plate 160 away from the base 120.

[0063] It is understandable that by setting the first elastic element 170 and the second elastic element 180, the stability of the bellows 130 during the process of switching from the first position to the second position can be further guaranteed.

[0064] Both the first elastic element 170 and the second elastic element 180 can be springs.

[0065] Furthermore, the cover plate 160 has a second protrusion 163 on the side facing the opening. The second protrusion 163 can extend into the second receiving cavity 124 through the second opening. The second protrusion 163 is provided with a second locking pin. The inner wall of the second receiving cavity 124 is provided with a second locking track. The second locking pin and the second locking track are slidably engaged.

[0066] The structure of the second locking pin can be the same as that of the first locking pin 164, and the structure of the second locking track can be the same as that of the first locking track 125.

[0067] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0068] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0069] In the description of the embodiments of this utility model, the term "and / or" refers to and covers any and all possible combinations of one or more of the associated listed items. The term "and / or" describes an association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this utility model generally indicates that the preceding and following related objects have an "or" relationship.

[0070] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after the connection. Furthermore, the directional terms mentioned in the embodiments of this utility model, such as "inner" and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0071] In the description of embodiments of this utility model, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0072] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An injection needle assembly, characterized in that, include: An injection needle, comprising a fixedly connected needle shaft and a base; A stretchable bellows is sleeved around the circumferential outer side of the injection needle. The bellows includes a first end near the needle bar and a second end away from the needle bar, the second end being movably connected to the base. The corrugated tube includes a first state and a second state. When the corrugated tube is in the first state, it covers the circumferential outer side of the base, and the needle bar is exposed to the corrugated tube. When the corrugated tube is in the second state, it covers the circumferential outer side of the needle bar, and the needle bar is located inside the corrugated tube. The outer peripheral surface of the base is provided with a first slide rail, which extends along the direction of the needle bar toward the base; The injection needle assembly also includes: The first connecting post includes a first slider and a first connecting rod connected together. The second end is connected to the first connecting rod. The first slider is slidably engaged with the first slide rail and can slide in the extension direction of the first slide rail.

2. The injection needle assembly according to claim 1, characterized in that, The outer circumferential surface of the base is provided with a second slide rail, which extends along the direction of the injection needle toward the base, and the second slide rail and the first slide rail are spaced apart in the circumferential direction of the base; The injection needle assembly also includes: The second connecting post includes a second slider and a second connecting rod connected together. The second end is connected to the second connecting rod. The second slider is slidably engaged with the second slide rail and can slide in the extension direction of the second slide rail.

3. The injection needle assembly according to claim 2, characterized in that, The first slide rail and the second slide rail are symmetrically arranged about the central axis of the needle bar; The first connecting post and the second connecting post are symmetrically arranged about the central axis of the needle bar.

4. The injection needle assembly according to claim 1, characterized in that, Also includes: A cover plate is located on the side where the first end of the corrugated pipe is located. The first end is connected to the cover plate. The cover plate has a through hole, and the needle rod passes through the through hole.

5. The injection needle assembly according to claim 4, characterized in that, The orthographic projection of the base onto the cover plate is located within the cover plate.

6. The injection needle assembly according to claim 4, characterized in that, The base is provided with a first receiving cavity having a first opening, the first opening facing the needle bar; The injection needle assembly also includes: A first elastic element is disposed in the first receiving cavity. One end of the first elastic element is connected to the cover plate, and the other end is connected to the bottom wall of the first receiving cavity. The first elastic element always applies a thrust to the cover plate away from the base.

7. The injection needle assembly according to claim 6, characterized in that, The cover plate has a first protrusion on the side facing the opening, the first protrusion can extend into the first receiving cavity through the first opening, and the first protrusion has a first locking part; The inner wall of the first receiving cavity is provided with a second locking part, and the first locking part and the second locking part are locked together.

8. The injection needle assembly according to claim 7, characterized in that, The first locking part is a first locking pin, and one end of the first locking pin is disposed on the outer peripheral surface of the first protrusion; The second locking part is a first locking track, which includes a connected vertical track and a horizontal track. The vertical track extends to the upper surface of the base, and the first locking pin slides in conjunction with the first locking track.

9. The injection needle assembly according to claim 6, characterized in that, The base is provided with a second receiving cavity having a second opening, the second opening facing the needle bar, and the second receiving cavity and the first receiving cavity are arranged circumferentially on the base; The injection needle assembly also includes: The second elastic element is disposed in the second receiving cavity. One end of the second elastic element is connected to the cover plate, and the other end is connected to the bottom wall of the second receiving cavity. The second elastic element always applies a thrust to the cover plate away from the base.

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