Safety needle assembly

Abstract

The present invention relates to a safety needle assembly (100), comprising: an injection needle (110) attached to a hub (120), the hub having a stud (130) and a receiving member (140) for receiving a dental syringe; an inner sheath (150) having a slit (190) for receiving the stud (130) so as to hold the injection needle (110); and an outer sheath (220) and a cap (240) for accommodating the inner sheath (150). In addition, a pair of outer studs (170) of the inner sheath (150) are complementary to an outer sheath inlet (230) and a cap inlet (250) so as to be removably engaged and locked via a locking member (210). The slit (190) comprises a plurality of ends (200) for receiving and locking the stud (130) via the locking member (210). Preferably, the safety injection needle assembly (100) comprises a sealing member (260) having two sets of indicators (280) for indicating positions.

Description

Technical Field

[0001] The present invention generally relates to a safety needle assembly, and more particularly to a safety needle assembly for use in the dental field to prevent accidental needle stick trauma. Background Art

[0002] Injection needles are widely used to administer drugs, such as anesthetics, to humans. For example, dental anesthetics are administered by injection using dental injection needles. However, most dental injection needles lack safety features to prevent accidental needle stick trauma, which poses a risk of transmitting blood-borne diseases such as human immunodeficiency virus (HIV) and hepatitis B.

[0003] There are few dental needles with enhanced safety features, but these needles are either too expensive or inconvenient to use. In addition, there have been several solutions to provide enhanced safety features for dental needles, two of which are discussed below:

[0004] WO 2012000837 A1 discloses an injection device, which includes a safety device and a pre-filled syringe with a hypodermic needle. The safety device includes a support body, an outer body, a needle shield, a releasable retaining member and a guiding member with a guide pin. The prior art relates to moving the needle shield into multiple positions, which includes a locking mechanism to control the desired movement and positioning of the needle shield, thereby controlling the exposure of the hypodermic needle. However, the prior art only provides a permanent locking mechanism, in which case there is no option for a temporary locking mechanism to further control the positioning and movement of the needle shield. In addition, the pre-filled syringe is configured to be retained in the safety device so that the prior art can work, which may not be suitable for injection in narrow or inaccessible areas such as the posterior gums.

[0005] US 9789262 B2 relates to a sheath for a cannula to prevent or minimize accidental needle stick trauma. The sheath is arranged on a hub and can be matched with a dental syringe, wherein the sheath includes a hollow cylinder having a cavity, thereby forming a concave feature configured to cooperate with a convex element of the hub to guide the sheath to move into a plurality of retracted positions. More specifically, the concave feature includes primary, secondary and tertiary transition structures for receiving the convex element of the hub and guiding the convex element to its respective position; primary and secondary locking structures for temporarily locking the convex element in its respective position; a final locking structure for permanently locking the convex element in its respective position; and a guiding structure for guiding the convex element to a desired position. However, the prior art does not have an outer sheath that encloses the entire sheath with the injection needle to further ensure sterility and better prevent needle stick trauma. In addition, the prior art does not include a member for indicating the position of the convex element and the locking structure for user reference.

[0006] Therefore, it can be seen in the prior art that there is a need for an improved and more effective safety needle assembly that provides different types of locking members at different locations to achieve the desired exposure of the needle during injection. In addition, there is a need to optimize the safety and sterility of the needle by having a double sheath. In addition, for the convenience of the user, it is desirable to have indicators for indicating the position and locking members. Summary of the invention

[0007] The following presents a simplified overview of the present invention in order to provide a basic understanding of some aspects of the present invention. This overview is not a complete overview of the present invention. Its sole purpose is to present some concepts of the present invention in a simplified form as a preface to the specific embodiments presented later.

[0008] It is an object of the present invention to provide a more user-friendly safety injection needle assembly, preferably for use in the dental field.

[0009] Another object of the present invention is to provide a safety injection needle assembly which has dual safety protection for accidental needle stick trauma to the user and the sterility of the injection needle by having a double-layer sheath, more specifically, an inner sheath for accommodating the injection needle, and an outer sheath for completely enclosing the inner sheath accommodating the injection needle.

[0010] Another object of the present invention is to provide a safety needle assembly comprising a slot on an inner sheath for receiving a stud, wherein the slot has multiple ends to control the exposure of the needle by sliding the stud to a desired position within the slot.

[0011] Another object of the present invention is to provide a safety injection needle assembly having locking means, more specifically temporary locking means and permanent locking means, for effectively holding and locking the injection needle at desired positions, such as respective ends on an inner sheath.

[0012] Another object of the present invention is to provide a safety injection needle assembly having an outer shield and a cap. In addition, both the outer shield and the cap have inlets and locking means, more precisely temporary locking means and permanent locking means, for locking the outer shield and the cap together with the inner shield via a pair of outer studs of the inner shield and the corresponding inlets of the outer shield and the cap.

[0013] In addition, another object of the present invention is to provide a safety injection needle assembly with a tearable sealing component, wherein the tearable sealing component includes two sets of indicators for indicating the positions of the pair of external studs and the outer sheath, the pair of ports on the cap, and a permanent locking member provided on the safety injection needle assembly.

[0014] Accordingly, these objectives can be achieved by following the teachings of the present invention. The present invention relates to a safety needle assembly for preventing accidental needle stick trauma, the safety needle assembly comprising: an injection needle, which is attached to a hub, the hub having a stud and a receiving member for receiving a conventional dental syringe; an inner sheath, which has a slit to receive the stud for holding the injection needle; and an outer sheath and a cap, which are used to accommodate the inner sheath including the injection needle. In addition, a pair of outer studs of the inner sheath are complementary to the outer sheath entrance and the cap entrance to removably engage and lock the inner sheath with the outer sheath and the cap via a locking member. In addition, the slit of the inner sheath includes a plurality of ends for receiving and locking the studs via a locking member. Preferably, the safety needle assembly includes a sealing component, which has two sets of indicators for indicating the positions of the outer sheath entrance, the cap entrance, the outer studs and the permanent locking member.

[0015] The above and other objects, features, aspects and advantages of the present invention will be better understood by carefully reading the detailed description provided herein below with appropriate reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to be able to understand the above-mentioned features of the present invention in detail, reference may have been made to a more particular description of the present invention briefly summarized above by way of example, some of which are shown in the accompanying drawings. It should be noted, however, that the accompanying drawings illustrate only typical embodiments of the present invention and are therefore not to be considered limiting of its scope, as the present invention may admit to other equally effective embodiments.

[0017] These and other features, benefits and advantages of the present invention will become apparent by reference to the following drawings, in which like reference numerals refer to like structures throughout the various figures, and in which:

[0018] Figure 1 is a schematic diagram showing a safety injection needle assembly according to a preferred embodiment of the present invention.

[0019] Figure 2 is a schematic diagram showing an inner sheath of a safety injection needle assembly according to a preferred embodiment of the present invention.

[0020] Figure 3 Schematic diagrams showing locking members and stud entrances on (a) a first end; (b) a second end; and (c) a third end of an inner sheath according to a preferred embodiment of the present invention.

[0021] Figure 4 is a schematic diagram showing the attachment of an outer shield and a cap to an inner shield of a safety needle assembly according to a preferred embodiment of the present invention.

[0022] Figure 5Schematic diagrams showing a sealing member of a safety injection needle assembly according to a preferred embodiment of the present invention in (a) a pre-use position and (b) a final use position.

[0023] Figure 6 2 is a schematic diagram showing a sealing member surrounding a safety needle assembly in (a) a pre-use position and (b) a final use position according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0024] Although the present invention is described herein by means of examples using embodiments and illustrative drawings, it will be appreciated by those skilled in the art that the present invention is not limited to the embodiments of the one or more drawings described, and the drawings do not wish to represent the proportions of the various components. In addition, some components that may form part of the present invention may not be shown in certain figures for ease of explanation, and such omissions do not limit the embodiments outlined in any way. It should be understood that the drawings and their detailed descriptions do not wish to limit the present invention to the specific form disclosed, on the contrary, the present invention will cover all modifications, equivalents and alternatives that fall within the scope of the present invention as defined by the appended claims. As used throughout the specification, the word "may" is used in a permissive sense (i.e., indicating that it is possible) rather than a mandatory sense (i.e., indicating that it must). In addition, unless otherwise mentioned, the word "a / one" means "at least one / at least one", and the word "multiple" means "one or more / one or more". In addition, the terms and wordings used herein are for descriptive purposes only and should not be interpreted as limiting the scope. Language such as "comprises," "including," "having," "containing," or "involving," and variations thereof are intended to be broad and encompass the subject matter listed thereafter, equivalents, and additional subject matter not described, and are not intended to exclude other additives, components, integers, or steps. Likewise, for purposes of applicable law, the term "comprises" is considered synonymous with the terms "include" or "containing." Any discussion of documents, statutes, materials, devices, papers, and the like is included in this specification solely for the purpose of providing context for the present invention. No suggestion or representation is made that any or all of these matters form part of the prior art base or are common general knowledge in the field relevant to the present invention.

[0025] In this disclosure, whenever a composition, element, or group of elements is preceded by the conjunction "comprising," it should be understood that we also contemplate that the composition, element, or group of elements has the conjunction "consisting of," "comprising," "selected from a group consisting of," "including," or "is" preceding the recitation of the composition, element, or group of elements, and vice versa.

[0026] The present invention is described below by various embodiments with reference to the accompanying drawings, wherein the reference numerals used in the accompanying drawings correspond to the same elements throughout the description. However, the present invention can be embodied in many different forms and should not be construed as being limited to the embodiments described herein. In fact, embodiments are provided to make this disclosure thorough and complete, and to fully convey the scope of the present invention to those skilled in the art. In the following detailed description, numerical values ​​and ranges are provided for various aspects of the described embodiments. These values ​​and ranges should be considered as examples only and are not intended to limit the scope of the claims. In addition, many materials are identified as being suitable for various aspects of the embodiments. These materials should be considered as exemplary and are not intended to limit the scope of the present invention.

[0027] The present invention relates to a safety injection needle assembly (100), the safety injection needle assembly (100) comprising: an injection needle (110) attached to a hub (120), the hub having a stud (130) and a receiving member (140) for receiving a syringe, whereby the hub (120) is attached at the distal end of an injection site of the injection needle (110); an inner sheath (150) having a slit (190) for receiving the stud (130), whereby the injection needle (110) is positioned and retained within the inner sheath (150); and an outer sheath (220) and a cap (240) for accommodating the injection needle (110). 0) of the inner sheath (150); characterized in that the inner sheath (150) has a pair of external studs (170), the outer sheath (220) has an outer sheath inlet (230) and the cap (240) has a cap inlet (250), which are complementary to the external studs (170) to removably engage and lock the inner sheath (150) and the outer sheath (220); and wherein the slit (190) of the inner sheath has a plurality of ends (200) for receiving the studs (130) to position the injection needle (110) and locking the studs (130) to retain the injection needle (110).

[0028] See the diagram, Figures 1 to 6 The present invention will now be described in more detail.

[0029] Figure 11 is a schematic diagram showing a safety injection needle assembly (100) according to a preferred embodiment of the present invention. The safety injection needle (100) comprises an injection needle (110), an inner sheath (150) for accommodating the injection needle (110), and an outer sheath (220) and a cap (240) for accommodating the inner sheath having the injection needle (110). The injection needle (110) is attached to a hub (120) having a stud (130) and a receiving member (140). More specifically, the injection needle (110) is preferably a conventional injection needle, and the hub (120) is attached at the distal end of the injection site of the injection needle (110). Preferably, the receiving member (140) is (but not limited to) a thread, which is configured to receive a syringe, more specifically a conventional dental syringe. Furthermore, the stud (130) of the hub (120) is removably engaged with the inner sheath (150), more specifically via a slot (190) provided on the inner sheath (150), for positioning and retaining the injection needle (110) within the inner sheath (150).

[0030] According to an embodiment of the present invention, the inner jacket (150) has the outer jacket studs (170), the outer jacket (220) has the outer jacket inlet (230) and the cap (240) has the cap inlet (250), which are complementary to the outer jacket studs (170), thereby removably engaging and locking the inner jacket (150) and the outer jacket (220) together.

[0031] According to an embodiment of the present invention, the inner jacket (150) has a raised surface (160) located between the pair of outer studs (170).

[0032] Figure 2 1 is a schematic diagram showing an inner shield (150) of a safety injection needle assembly (100) according to a preferred embodiment of the present invention. The inner shield (150) includes a slit (190) having a plurality of ends (200) for receiving a stud (130) to position the injection needle (110) and locking the stud (130) to hold the injection needle (110). In the pre-use position, i.e., before the injection needle (110) is used, the stud (130) is positioned at a temporary locking member (210a) of a third end (200c) aligned with the stud inlet (180).

[0033] According to an embodiment of the present invention, the inner jacket (150) comprises a stud inlet (180) for receiving the stud (130), which is connected to the slot (190) of the inner jacket (150).

[0034] According to an embodiment of the present invention, the plurality of ends (200) of the slit (190) include a first end (200a), a second end (200b) and a third end (200c), whereby each of the first end (200a), the second end (200b) and the third end (200c) of the inner sheath (150) has a locking member (210) for locking the stud (130). In addition, each of the plurality of ends (200) determines the position of the injection needle (110), more specifically, the exposure of the injection needle (110).

[0035] According to an embodiment of the present invention, the first end (200a) is located at the distal end of the stud inlet (180) and the inner jacket (150) to the outer stud (170).

[0036] According to an embodiment of the present invention, the third end (200c) is located at the proximal end of the pair of outer studs (170) of the inner sheath (150). In addition, the stud inlet (180) is located at the third end (200c) of the slot (190).

[0037] According to an embodiment of the present invention, the second end (200b) is located between the first end (200a) and the third end (200c).

[0038] Figure 3 Schematic diagram showing the locking member (210) on (a) the first end (200a); (b) the second end (200b); and (c) the third end (200c) and the stud inlet (180) of the inner sheath (150) according to a preferred embodiment of the present invention. Preferably, the locking member (210) includes a temporary locking member (210a) and a permanent locking member (210b).

[0039] According to an embodiment of the present invention, the temporary locking member (210a) comprises a plurality of protrusions. In addition, the permanent locking member (210b) comprises a one-way lock. In addition, as Figure 3 As shown in (a) to (c), the temporary locking member (210a) preferably includes (but is not limited to) a plurality of semicircular protrusions, and the permanent locking member (210b) preferably includes (but is not limited to) a pair of L-shaped spring locks.

[0040] According to an embodiment of the present invention, each of the first end (200a) and the third end (200c) of the inner sheath (150) preferably has a temporary locking member (210a) for locking and unlocking the stud (130).

[0041] More specifically, the temporary locking member (210a) on the first end (200a) is configured to hold the stud (130) so that the injection needle (110) is completely exposed from the inner sheath (150). On the other hand, the temporary locking member (210a) on the third end (200c) is configured to completely cover the injection needle (110) in the inner sheath (150).

[0042] According to an embodiment of the present invention, the stud inlet (180) and the second end (200b) preferably have a permanent locking member (210b) for locking the stud (130). More specifically, the permanent locking member (210b) on the stud inlet (180) is configured to hold the stud (130) on the slit (190), while the permanent locking member (210b) on the end (200b) is configured to hold the stud (130) in the final use position, specifically, when the injection needle (110) is discarded after the final use.

[0043] Figure 4 is a schematic diagram showing the attachment of the outer sheath (220) to the inner sheath (150) of the safety injection needle assembly (100) according to a preferred embodiment of the present invention. Figure 4 As shown in , the outer sheath (220) is configured to accommodate the inner sheath (150) including the injection needle (110). Preferably, the outer sheath (220) and the cap (240) accommodate different parts of the inner sheath (150).

[0044] According to an embodiment of the present invention, the cap (240) is configured to accommodate the inner sheath (150) of the receiving member (140) having the hub (120). On the other hand, the outer sheath (220) is configured to accommodate the inner sheath (150) of the injection site having the injection needle (110). Preferably, the outer sheath (220) and the cap (240) accommodate the inner sheath (150) in a removable manner depending on user needs.

[0045] According to an embodiment of the present invention, the outer sheath (220) and the cap (240) are separated in the pre-use position by a raised surface (160) of the inner sheath (150).

[0046] like Figure 4As shown in , each of the outer jacket inlet (230) and the cap inlet (250) includes a temporary locking member (210a) and a permanent locking member (210b) for locking the outer stud (170) of the inner jacket (150) to the outer jacket (220) cap (240). Similar to the inner jacket (150), the temporary locking member (210a) of the outer jacket (220) and the cap (240) preferably includes (but is not limited to) the plurality of semicircular protrusions, and the permanent locking member (210b) of the outer jacket (220) and the cap (240) preferably includes (but is not limited to) the pair of L-shaped spring locks.

[0047] Preferably, both the outer jacket inlet (230) and the cap inlet (250) are T-shaped inlets. More preferably, the temporary locking member (210a) is located at the junction of the T-shaped inlet, the permanent locking member (210b) is located at one end of the T-shaped inlet, and the opposite end of the T-shaped inlet does not have a locking member (210). In addition, in the pre-use position, the pair of external studs (107) are aligned and fixed at the temporary locking members (210a) of the corresponding outer jacket inlet (230) and the cap inlet (250).

[0048] More specifically, the temporary locking members (210a) on the outer shield inlet (230) and the cap inlet (250) are configured to retain the corresponding outer stud (170) in the pre-use position, while the permanent locking members (210b) on the outer shield inlet (230) and the cap inlet (250) are configured to retain the corresponding outer stud (170) in the final use position. In addition, once both the inner shield (150) and the outer shield (220) are in the final use position, the safety needle assembly (100) is safely discarded.

[0049] Figure 5 Schematic diagram showing a sealing member (260) of a safety injection needle assembly (100) in (a) a pre-use position and (b) a final use position according to a preferred embodiment of the present invention. More specifically, the injection needle assembly (100) includes a sealing member (260) having a pair of tearable serrated lines (270), which are referred to as a first serrated line (270a) and a second serrated line (270b).

[0050] According to an embodiment of the present invention, the sealing component (260) has (but is not limited to) two sets of indicators (280) for indicating the positions of the outer sleeve inlet (230), the cap inlet (250), the outer sleeve inlet (230) and the cap inlet (250), the outer stud (170), the permanent locking member (210b) and the second end (200b).

[0051] According to an embodiment of the present invention, the injection needle assembly (100) includes a sealing component (260) having the pair of tearable serrated lines (270) as an outermost layer, thereby surrounding the protruding surface (160) of the inner sheath (150), the outer sheath (220) and the cap (240) in a pre-use position. Figure 6 Schematic diagrams showing a sealing member (260) surrounding a safety needle assembly (100) in (a) a pre-use position and (b) a final use position according to a preferred embodiment of the present invention.

[0052] According to an embodiment of the present invention, the sealing member (260) is preferably tearable into three sections along the pair of serrated lines (270), whereby the three sections are individually attached to the protruding surface (160) of the inner sheath (150), the outer sheath (220) and the cap (240), such as Figure 6 shown.

[0053] According to an embodiment of the present invention, the first set of indicators (280a) provided on the sealing member (260) has three marks, whereby the three marks correspond to the positions of the outer jacket inlet (230), the pair of outer studs (170) and the cap inlet (250). Figure 5 and 6 As shown, the three marks are preferably (but not limited to) three rectangular marks, namely, a first mark (280aa), a second mark (280ab) and a third mark (280ac). More specifically, the first mark (280aa), the second mark (280ab) and the third mark (280ac) correspond to the positions of the outer sheath inlet (230), the pair of outer studs (170) and the cap inlet (250), respectively.

[0054] Preferably, the first mark (280aa), the second mark (280ab) and the third mark (280ac) are aligned when in the pre-use position, such as Figure 5 (a) and Figure 6 (a). The alignment of the first mark (280aa) and the second mark (280ab) corresponds to the alignment of the outer jacket inlet (230) and the corresponding outer stud (170), thereby achieving the placement or removal of the outer jacket (220) on the inner jacket (150). In addition, the alignment of the second mark (280ab) and the third mark (280ac) corresponds to the alignment of the cap inlet (250) and the corresponding outer stud (170), thereby achieving the placement or removal of the cap (240) on the inner jacket (150).

[0055] According to an embodiment of the present invention, the second set of indicators (280b) provided on the sealing member (260) has three markings, whereby the three markings correspond to the permanent locking members (210b) on the outer sheath (220), the cap (240) and the second end (200b). In the final use position, when the hub (120) is covered by the second set of indicators (280b), the position of the stud (130) is verified, as shown in FIG. Figure 6 (b) as shown.

[0056] like Figure 5 and 6 As shown, the three marks of the second group of indicators (280b) are preferably (but not limited to) three triangular pointers, namely, a first pointer (280ba), a second pointer (280bb) and a third pointer (280bc). Preferably, the first pointer (280ba) corresponds to the permanent locking member (210b) provided on the outer sheath (220), more specifically, the outer sheath inlet (230). The second pointer (280bb) corresponds to the permanent locking member (210b) provided on the cap (240), more specifically, the cap inlet (250). In addition, the third pointer (280bc) corresponds to the permanent locking member (210b) provided on the inner sheath (150), more specifically, the second end (200b).

[0057] More specifically, the alignment of the first pointer (280ba) with the second mark (280ab) indicates that the corresponding outer stud (170) is locked in the permanent locking member (210b) provided on the outer jacket inlet (230). On the other hand, the alignment of the second pointer (280bb) with the second mark (280ab) indicates that the corresponding outer stud (170) is locked in the permanent locking member (210b) provided on the cap inlet (250).

[0058] like Figure 5 (b) and Figure 6 As shown in (b), the second set of indicators (280b) points to the second mark (280ab), thereby indicating that the pair of external studs (170) are locked in the permanent locking members (210b) on the corresponding outer shield inlet (230) and the cap inlet (250), and the studs (130) are also locked in the permanent locking members (210b) on the second end (200b) of the inner shield (150). Preferably, when the second set of indicators (280b) is in the final use position, the injection needle (110) is completely covered and permanently locked in the inner shield (150), and the safety injection needle assembly (100) can therefore be safely discarded.

[0059] Preferably, the stud (130), the pair of external studs (170), the stud entry (180), the gap (190), the multiple ends (200), the locking member (210), the entry (250) and the two sets of indicators (280) can exist and function independently or as a mirrored pair.

[0060] Hereinafter, examples of the present invention will be provided to explain in more detail. Through these examples, advantages of the present invention can be more easily understood and put into practice. However, it should be understood that the following examples are not intended to limit the scope of the present invention in any way.

[0061] Examples

[0062] Example 1

[0063] Attaching the syringe to the safety needle assembly

[0064] The safety needle assembly (100) in the pre-use position is selected for injection operation, wherein the safety needle assembly (100) is maintained in a position where the outer sheath (220) is located on the left and the cap (240) is located on the right. In the pre-use position, the pair of external studs (107) are aligned and fixed at the temporary locking members (210a) of the corresponding outer sheath inlet (230) and the cap inlet (250). In addition, the first mark (280aa), the second mark (280ab) and the third mark (280ac) of the first group of indicators (280a) are also aligned in the pre-use position.

[0065] The cap (240) is gently twisted along the second zigzag line (270b) to tear the sealing member (260), thereby causing the corresponding outer stud (170) to move toward the opposite end of the permanent locking member (210b) of the T-shaped cap inlet (250) without the locking member (210). As a result, the third mark (280ac) of the sealing member (260) moves counterclockwise from its pre-use position and is no longer aligned with the first mark (280aa) and the second mark (280ab). The non-aligned third mark (280ac) indicates that the position of the outer stud (170) in the cap inlet (250) is no longer aligned with the outer stud (170) in the outer jacket inlet (230), wherein the outer stud (170) has moved upward to the opposite end of the permanent locking member (210b) of the T-shaped cap inlet (250).

[0066] After tearing the sealing member (260) along the second serrated line (270b), the cap (240) is rotated clockwise until the third mark (280ac) is aligned with the second mark (280ab) again to indicate that the outer stud (170) is aligned with the cap inlet (250), that is, the outer stud (170) is in the pre-use position again, and then the cap (240) is removed from the inner sleeve (150).

[0067] The dental syringe is attached to the safety needle assembly (100) via a receiving member (140) on the hub (120). The stud (130) remains in a pre-use position, wherein the stud (130) is locked at a temporary locking member (210a) at the third end (200c) of the slot (190).

[0068] The outer sheath (220) is then gently twisted along the first zigzag line (270a) to tear the sealing member (260), thereby causing the first marking (280aa) of the sealing member (260) to move from its pre-use position and thus no longer align with the second marking (280ab). The outer stud (170) is then realigned with the outer sheath inlet (230) again to the pre-use position, and the outer sheath (220) is then removed from the inner sheath (150). As a result, both the outer sheath (220) and the cap (240) are disengaged from the inner sheath (150), while the injection needle (110) remains within the inner sheath (150).

[0069] Example 2

[0070] Injection procedure using safety needle assembly

[0071] In the pre-use position, the stud (130) is positioned at the temporary locking member (210a) of the third end (200c). The inner sheath (150) is rotated clockwise to release the stud (130) from the temporary locking member (210a) of the third end (200c), thereby enabling the stud (130) to slide up and down along the gap (190). When the stud (130) slides to the first end (200a), the injection needle (110) is fully exposed. In addition, the stud (130) is temporarily locked at the temporary locking member (210a) of the first end (200a), thereby preventing the inner sheath (150) from moving and interfering with the injection operation.

[0072] After injection, the inner sheath (150) is rotated clockwise to be released from the temporary locking member (210a) of the first end (200a). The stud (130) slides toward the third end (200c), so that the injection needle (110) is completely covered in the inner sheath (150). In addition, the stud (130) can be repeatedly slid along the slit (190) depending on user requirements, thereby allowing multiple injections to be performed using the same injection needle (110).

[0073] Example 3

[0074] Disposal of safety needle assemblies

[0075] Once the injection operation is completed, the stud (130) slides along the gap (190) and moves into the permanent locking member (210b) of the second end (200b), wherein the stud (130), the permanent locking member (210b) and the second end (200b) are overlapped by the second mark (280ab) and the third pointer (280bc) (corresponding to the final use position). By rotating the inner sleeve (150) counterclockwise, the inner sleeve (150) and the hub (120) are securely locked together as a single unit in the final use position.

[0076] In the final use position, the outer shield (220) is then engaged with the inner shield (150) again, and the safety needle shield (100) is then discarded. The first mark (280aa) and the second mark (280ab) are aligned, so that the outer stud (170) is aligned with the outer shield inlet (230), and then the corresponding outer stud (170) is pushed into the outer shield inlet (230). Subsequently, a tight fit between the inner shield (150) and the outer shield (220) is achieved. In addition, the outer shield (220) is rotated clockwise, and then the outer stud (170) is pushed into the permanent locking member (210b) of the outer shield inlet (230), which can be verified when the first pointer (280ba) is aligned with the second mark (280ab).

[0077] The injection needle (110) is then removed from the syringe by unscrewing the syringe at the receiving member (140) and then reengaging the cap (240) with the inner sheath (150). Similar to the engagement of the outer sheath (220) to the inner sheath (1500), the second mark (280ab) and the third mark (280ac) are aligned and pushed toward each other, so that the outer stud (170) is aligned with the cap inlet (250) and the outer stud (170) is pushed into the cap inlet (250). Subsequently, a tight fit between the inner sheath (150) and the cap (240) is achieved. In addition, the cap (240) is turned clockwise, and thus the outer stud (170) is pushed into the permanent locking member (210b) of the cap inlet (250), which can be verified when the second pointer (280bb) points to the second mark (280ab). Therefore, the inner sheath (150) is fully engaged by the outer sheath (220), and the safety injection needle assembly (100) can be discarded without causing accidental needle stick trauma.

[0078] The above-mentioned safety injection needle assembly (100) overcomes the problems and disadvantages of the existing injection needle assembly. The present invention is more user-friendly and provides double safety protection for accidental needle stick trauma to the user and sterility of the injection needle by having a double-layer sheath (150, 220), more specifically, an inner sheath (150) for accommodating the injection needle, and an outer sheath (220) and a cap (240) for completely enclosing the inner sheath (150) accommodating the injection needle (110). In addition, the present invention allows the user to control the exposure of the injection needle (110) by sliding the stud (130) in the gap (190) having the plurality of ends (200). In addition, the present invention also provides a locking member (210), including a temporary locking member (210a) and a permanent locking member (210b), for effectively holding the injection needle (110) at a desired position by locking the stud (130) at the corresponding multiple ends (200) on the inner sheath (150). In addition, the removable outer sheath (220) and the cap (240) include a locking member (210) for locking the inner sheath (150). Preferably, the present invention also includes a tearable sealing component (260), which includes two sets of indicators (280) for indicating the position of the pair of outer studs (170), the outer sheath inlet (230), the cap inlet (250), and the permanent locking member (210b) provided on the safety injection needle assembly (110).

[0079] The exemplary embodiments described above are shown with specific shapes, sizes and other characteristics, but the scope of the present invention also includes various other shapes, sizes and characteristics. Moreover, the components as described above can be manufactured in various other ways and can include various other materials.

[0080] Based on this specification and the accompanying drawings, various modifications to these embodiments will be clear to those skilled in the art. The principles associated with the various embodiments described herein can be applied to other embodiments. Therefore, this specification is not intended to be limited to the embodiments described in conjunction with the accompanying drawings. Figure 1 The present invention is intended to include all such alternatives, modifications and variations that fall within the scope of the present invention and the appended claims.

[0081] Although the present invention has been described with reference to specific embodiments also shown in the accompanying drawings, it will be apparent to those skilled in the art that many variations and modifications are possible within the scope of the invention as described in the specification and defined in the appended claims.

[0082] Description of the reference numerals used in the drawings according to the present invention:

[0083] Reference Numbers describe 100 Safety needle assembly 110 Injection needle 120 Wheels 130 Stud 140 Receiving components 150 Inner sheath 160 Raised surface 170 A pair of external studs 180 stud entrance 190 Gap 200 Multiple terminals 200a First end 200b The second end 200c The third end 210 Locking components 210a Temporary locking components 210b Permanent locking components 220 Outer sheath 230 Outer sheath inlet 240 Blocked Shots 250 Cap entrance 260 Sealing parts 270 A pair of jagged lines 270a First zigzag line 270b Second zigzag line 280 Two sets of indicators 280a The first set of indicators 280aa First Mark 280ab Second Mark 280ac Third Mark 280b The second set of indicators 280ba First pointer 280bb Second pointer 280bc The third pointer

Claims

1. A safety injection needle assembly (100), characterized in that: The safety injection needle assembly (100) include: an injection needle (110) attached to a hub (120) having a stud (130) and a receiving member (140) for receiving a syringe, whereby the hub (120) is attached at a distal end of an injection site of the injection needle (110); an inner sheath (150) having a slot (190) for receiving the stud (130), thereby positioning and retaining the injection needle (110) within the inner sheath (150); and An outer sheath (220) and a cap (240) which can be locked with the inner sheath (150) including the injection needle (110); The characteristic is that The inner jacket (150) has a pair of outer studs (170), the outer jacket (220) has an outer jacket inlet (230) and the cap (240) has a cap inlet (250) which are complementary to the pair of outer studs (170) to removably engage and lock the inner jacket (150) and the outer jacket (220) together; and wherein the slit (190) of the inner sheath (150) has a plurality of ends (200) for receiving the stud (130) to position the injection needle (110) and locking the stud (130) to retain the injection needle (110); and Each of the outer jacket inlet (230) and the cap inlet (250) includes a temporary locking member (210a) and a permanent locking member (210b) for locking the pair of outer studs (170) of the inner jacket (150) to the outer jacket (220) and the cap (240).

2. The safety injection needle assembly (100) according to claim 1, characterized in that: The inner jacket (150) has a raised surface (160) located between the pair of outer studs (170).

3. The safety injection needle assembly (100) according to claim 1, characterized in that: The inner jacket (150) includes a stud inlet (180) for receiving the stud (130), which is connected to the slot (190) of the inner jacket (150).

4. The safety injection needle assembly (100) according to claim 1, characterized in that: The plurality of ends (200) of the slit (190) include a first end (200a), a second end (200b) and a third end (200c), whereby each of the first end (200a), the second end (200b) and the third end (200c) of the inner jacket (150) has a locking member (210) for locking the stud (130).

5. The safety injection needle assembly (100) according to claim 4, characterized in that: The first end (200a) is located at a distal end of the stud inlet (180) and the pair of outer studs (170) of the inner jacket (150).

6. The safety injection needle assembly (100) according to claim 4, wherein the third end (200c) is located at a proximal end of the pair of outer studs (170) of the inner sheath (150).

7. The safety injection needle assembly (100) according to claim 4, characterized in that: The stud entry (180) is located near the third end (200c) of the slot (190).

8. The safety injection needle assembly (100) according to claim 4, characterized in that: The second end (200b) is located between the first end (200a) and the third end (200c).

9. The safety injection needle assembly (100) according to claim 4, characterized in that: Each of the first end (200a) and the third end (200c) of the inner sheath (150) has a temporary locking member (210a) for locking and unlocking the stud (130).

10. The safety injection needle assembly (100) according to claim 4, characterized in that: The stud inlet (180) and the second end (200b) have permanent locking members (210b) for locking the stud (130).

11. The safety injection needle assembly (100) according to claim 1, characterized in that: The cap (240) is configured to receive the inner sheath (150) having the receiving member (140) of the hub (120).

12. The safety injection needle assembly (100) according to claim 2, characterized in that: The outer sheath (220) and the cap (240) are separated by the raised surface (160) of the inner sheath (150) in a pre-use position.

13. The safety injection needle assembly (100) according to claim 1, characterized in that: The temporary locking member (210a) includes a plurality of protrusions.

14. The safety injection needle assembly (100) according to claim 10 or 13, characterized in that: The permanent locking member (210b) comprises a one-way lock.

15. The safety injection needle assembly (100) according to claim 12, characterized in that: The injection needle assembly (100) includes a sealing member (260) having a pair of tearable serrated lines (270) as an outermost layer, thereby surrounding the protruding surface (160) of the inner sheath (150), the outer sheath (220) and the cap (240) in the pre-use position.

16. The safety injection needle assembly (100) according to claim 15, characterized in that: The sealing member (260) can be torn into three sections along the pair of tearable serrated lines (270), whereby the three sections are individually attached to the protruding surface (160) of the inner sheath (150), the outer sheath (220) and the cap (240).

17. The safety injection needle assembly (100) according to claim 15, characterized in that: The sealing component (260) has two sets of indicators (280) for indicating the positions of the outer jacket inlet (230), the cap inlet (250), the outer jacket inlet (230) and the outer cap inlet (250), the outer stud (170), the permanent locking member (210b) and the second end (200b).

18. The safety injection needle assembly (100) according to claim 17, characterized in that: The first set of indicators (280a) provided on the sealing member (260) has three marks, whereby the three marks correspond to the positions of the outer jacket inlet (230), the pair of outer studs (170) and the cap inlet (250).

19. The safety injection needle assembly (100) according to claim 17, characterized in that: The second set of indicators (280b) provided on the sealing member (260) has three markings, whereby the three markings correspond to the permanent locking members (210b) on the outer sheath inlet (230), the cap inlet (250) and the second end (200b).

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