A device for concealing and protecting a syringe needle and a syringe

Abstract

The utility model relates to injection device field, concretely is a kind of device and syringe for syringe needle concealment and protection, including outer tube, protection cylinder, rotating ring, compression ring, elastic element, inner tube, injection element and push rod;One end of protection cylinder is sequentially provided rotating ring, compression ring and inner tube;Compression ring and rotating ring abutment drive rotating ring rotation, and then make protection cylinder move along the sliding restraint groove of rotating ring inside;Elastic element realizes the reset of protection cylinder;Injection element is inserted into protection cylinder after passing through inner tube, compression ring and rotating ring, and push rod is connected with injection element.Push rod drives compression ring to press down and make rotating ring relative to protection cylinder realize rotation, and then make protection cylinder relatively realize axial sliding and rotation on the restraint groove on rotating ring under the action of elastic element until trigger locking.Needle is concealed in protection cylinder in process, weakens the psychological influence to patient and effectively protects needle, and the locking of needle can also avoid the secondary use of syringe and accidental touch to stab others.

Description

Technical Field

[0001] This utility model relates to the field of injection devices, specifically a device for concealing and protecting the needle of a syringe and a syringe. Background Technology

[0002] In the medical field, syringes are one of the most commonly used medical devices, but traditional syringes and related technologies have many shortcomings. Currently, the exposed needle of common syringes can cause psychological stress for patients, especially those who have a fear of needles. This psychological burden may affect the smooth execution of the injection procedure.

[0003] Furthermore, traditional syringes lack adequate needle protection after injection, making them prone to accidental injury to healthcare workers or patients due to accidental needle contact. Exposed needles also pose a risk of cross-infection during device disposal.

[0004] To overcome these shortcomings, some syringes with protective devices have appeared on the market. However, the triggering methods of these devices have significant deficiencies: either their structure is simple but the needle protection is unreliable, or they require force to trigger the switch to activate the protective device; they fail to achieve reliable and simple triggering. Furthermore, most of these devices simply add a single protective function to the syringe, without providing other auxiliary functions, thus failing to maximize the use of these added components to provide a better user experience. Utility Model Content

[0005] To overcome the problems existing in the prior art, the purpose of this utility model is to provide a device and syringe for concealing and protecting the syringe needle.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for concealing and protecting syringe needles, comprising: an outer cylinder, a protective cylinder, a rotating ring, a pressure ring, an elastic element, an inner cylinder, an injection element, and a push rod;

[0007] The protective cylinder is located inside the outer cylinder and can move along the axial direction of the outer cylinder. One end of the protective cylinder is the needle protrusion end, and the other end is sequentially provided with a rotating ring, a pressure ring, and an inner cylinder. The inner wall of the rotating ring is provided with a sliding constraint groove, and the protective cylinder moves relative to the sliding constraint groove in the rotating ring. The pressure ring abuts against the rotating ring, driving the rotating ring to rotate, realizing the trigger locking protection after use. The elastic element is sleeved on the outside of the injection element, with one end of the elastic element abutting against the protective cylinder and the other end abutting against the inner cylinder, providing the reset power for the protective cylinder.

[0008] One end of the injection element is equipped with a needle, which passes through the inner cylinder, the pressure ring, and the rotating ring before extending into the protective cylinder. The other end of the injection element is an injection needle tube. A push rod is connected to the injection needle tube. During the push process, the push rod drives the pressure ring to press down, causing the rotating ring to rotate relative to the protective cylinder. The protective cylinder is reset by an elastic element, allowing the protective cylinder to slide axially relative to the rotating ring. This allows the protective cylinder to move relative to the rotating ring within the sliding constraint groove until the locking position is triggered.

[0009] The present invention is further configured such that: the outer cylinder includes a needle protrusion section, a protective cylinder mounting section, and a drive mounting section; one end of the protective cylinder mounting section is connected to the needle protrusion section, and the other end is connected to the drive mounting section, and the diameter of the protective cylinder mounting section gradually shrinks from the connection point with the drive mounting section to the needle protrusion section.

[0010] The present invention is further configured such that: at least one set of limiting components is provided at the end of the protective cylinder away from the needle protrusion end, and the end face of the limiting component is the contact surface of the first elastic element, and the contact surface of the first elastic element abuts against the elastic element;

[0011] The limiting component includes a stop block and a first rib; the first rib is disposed on the outer wall of the protective cylinder, and the stop block is disposed at a preset distance from the first rib in the circumferential direction; the stop block is disposed in the sliding constraint groove, and the stop block drives the protective cylinder to slide relative to each other along the sliding constraint groove;

[0012] The inner wall of the protective cylinder installation section is provided with a protective cylinder limiting rib group and a protective cylinder stop rib; the positions of the protective cylinder limiting rib group and the protective cylinder stop rib are respectively matched with the positions of the first rib and the stop block.

[0013] After installation, the stop block of the protective cylinder abuts against the stop rib of the protective cylinder. The first rib of the protective cylinder is located in the groove between the limit ribs of the protective cylinder. The stop block can only move upward due to the obstruction of the stop ribs of the protective cylinder, preventing the protective cylinder from detaching from the outer cylinder. The first rib can only move up and down within the groove between the limit ribs of the protective cylinder, so that the protective cylinder can only move along the axial direction of the device, preventing the protective cylinder from rotating.

[0014] The present invention is further configured such that: one end of the rotating ring abuts against the stop rib of the protective cylinder, and the other end is configured as a first tooth surface, the first tooth surface abuts against the pressure ring.

[0015] The present invention is further configured such that: the sliding constraint groove includes a second rib, a third rib, and a locking block; the second rib is disposed between the locking block and the third rib, a first sliding groove is formed between the second rib and the third rib, and a second sliding groove is formed between the second rib and the locking block; a circumferential locking groove is provided at the bottom of the locking block, and the locking groove communicates with the second sliding groove.

[0016] The present invention is further configured such that: the axial length of the second rib is equal to or less than the preset axial movement distance of the protective cylinder; the axial length of the third rib and the locking block is greater than the preset axial movement distance of the protective cylinder.

[0017] The present invention is further configured such that: one end of the pressure ring is configured as a second tooth surface, the second tooth surface abuts against the first tooth surface, and the shape of the second tooth surface matches that of the first tooth surface;

[0018] The pressure ring sidewall is provided with positioning ribs, which are connected to the outer cylinder through the positioning ribs;

[0019] The inner wall of the drive mounting section is provided with a positioning groove, and the positioning rib is inserted into the positioning groove.

[0020] Both the first and second tooth surfaces are helical tooth surfaces.

[0021] The above structure allows the pressure ring to move only axially relative to the outer cylinder after assembly, and it cannot rotate; during the axial downward pressing process, the second tooth surface of the pressure ring contacts the first tooth surface, causing the first tooth surface of the rotating ring to slide and rotate along the second tooth surface.

[0022] During actual operation, the pressure ring will drive the rotating ring to press down, causing the rotating ring to move relative to the protective cylinder. At this time, the stop block moves along the first slide groove. When the stop block passes the length of the second rib, the rotating ring will rotate along the second tooth surface, causing the stop block to move from the first slide groove to the second slide groove.

[0023] The present invention is further configured such that: at one end of the pressure ring away from the second tooth surface, two first cantilever arms are symmetrically arranged, and a first buckle is provided on the outer side of the first cantilever arm;

[0024] The drive mounting section has symmetrically arranged first fasteners on its sidewalls, and a transition block is provided on the inner wall of the drive mounting section at the top of the first fasteners.

[0025] In the initial state, the first buckle is in contact with the transition block. During the pressing process, the first buckle passes over the transition block. After the injection is completed, the first buckle engages in the first locking position, thereby locking the pressure ring axially.

[0026] The present invention is further configured such that: one end of the inner cylinder is a contact surface of the second elastic element, and the contact surface of the second elastic element abuts against the elastic element; two second cantilever arms are symmetrically arranged at the other end, and a second buckle is provided on the outer side of the second cantilever arm;

[0027] The sidewall of the drive mounting section is symmetrically provided with second fasteners, and the second buckle is engaged in the second fasteners; and the second fasteners are staggered with the first fasteners.

[0028] The present invention is further configured such that: a pressure channel is provided on both sides of the inner cylinder, and the first cantilever passes through the pressure channel and is fastened to the transition block.

[0029] The purpose of the above structure is that, with the inner and outer cylinders relatively fixed, the axial movement of the pressure ring is restricted by the inner cylinder in the initial state, preventing the pressure ring from detaching from the device. During the pressing process, the push rod contacts the first cantilever extending from the inner cylinder, driving the first cantilever to press down along the pressing channel until the injection is completed. At this point, the first buckle on the outside of the first cantilever engages with the first locking position, thus axially locking the pressure ring.

[0030] The present invention is further configured such that: a needle tube mounting groove is provided on the inner side of the inner cylinder, and a flange is provided at the tail of the injection needle tube, the flange engaging with the needle tube mounting groove to fix the injection needle tube relative to the inner cylinder.

[0031] This utility model also relates to a syringe, including the above-described device for concealing and protecting the syringe needle.

[0032] In summary, the beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0033] In this invention, the injection needle is concealed within the protective sleeve during and after the injection process, reducing the psychological impact of the needle on the patient and enhancing the effectiveness of needle protection.

[0034] By cooperating with the protective sleeve, rotating ring, and pressure ring, the protective sleeve moves to the locked position during injection. When pulled out, the elastic force of the elastic element resets the protective sleeve, which is then locked along the sliding constraint groove of the rotating ring, thus concealing and protecting the needle.

[0035] This invention can prevent needles from harming users and also prevent used needles from harming handlers and causing cross-infection during waste disposal; at the same time, locking the needles can also prevent the syringe from being reused. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is an exploded view of Embodiment 1 of this utility model;

[0038] Figure 2 This is a cross-sectional view of the outer cylinder and the protective cylinder in their initial state according to Embodiment 1 of this utility model.

[0039] Figure 3 This is a cross-sectional view of the rotating ring according to Embodiment 1 of this utility model;

[0040] Figure 4 This is an isometric view of the pressure ring according to Embodiment 1 of this utility model;

[0041] Figure 5 This is an isometric view of the inner cylinder of Embodiment 1 of this utility model;

[0042] Figure 6 This is a schematic diagram of the assembly of the inner and outer cylinders after removing the pressure ring and push rod in Embodiment 1 of this utility model.

[0043] Figure 7 This is based on Embodiment 1 of the present utility model. Figure 6 Assembly diagram of the pressure ring, inner cylinder and outer cylinder after installation;

[0044] Figure 8 This is a cross-sectional view of the initial state of Embodiment 1 of this utility model;

[0045] Figure 9 This is a partial cross-sectional view of the initial state of Embodiment 1 of this utility model;

[0046] Figure 10 This is a partial cross-sectional view of the locked state in Embodiment 1 of this utility model;

[0047] Figure 11 This is the initial state of Embodiment 1 of the present invention, with the outer cylinder removed from the isometric view;

[0048] Figure 12 This is a cross-sectional view of the present invention in Embodiment 1, showing the preparation for injection after needle insertion.

[0049] Figure 13 This is a cross-sectional view of Embodiment 1 of this utility model after injection but before needle removal;

[0050] Figure 14 This is a partial isometric view of the outer cylinder after injection but before the needle is removed, according to Embodiment 1 of this utility model.

[0051] Figure 15 This is a cross-sectional view of the locked state in Embodiment 1 of this utility model;

[0052] Figure 16 In the locked state of Embodiment 1 of this utility model, a partial isometric view of the outer cylinder is removed;

[0053] Figure 17 This is a schematic diagram of an embodiment of the present utility model;

[0054] Figure 18 This is a schematic diagram showing the positions of the pressure block and the first cantilever during the injection process in Embodiment 2 of this utility model;

[0055] Figure 19 This is a schematic diagram showing the position of the pressure block and the first cantilever when the injection process is completed in Embodiment 2 of this utility model;

[0056] Figure 20 This is a schematic diagram of the position of the pressure block and the first cantilever when the injection is completed and the block is far from the affected area in Embodiment 2 of this utility model.

[0057] The attached diagram lists the components represented by each number as follows:

[0058] 1. Outer cylinder; 101. Protective cylinder stop rib; 102. Transition block; 103. First fastener; 104. Protective cylinder limit rib group; 105. Positioning groove; 106. Second fastener.

[0059] 2. Protective cylinder; 201. Stop block; 202. Contact surface of the first elastic element; 203. First rib;

[0060] 3. Rotating ring, 301. First tooth surface, 302. Locking block, 303. Second slide groove, 304. Locking groove, 305. Second rib, 306. First slide groove, 307. Third rib;

[0061] 4. Pressure ring, 401. Second toothed surface, 402. First buckle, 403. Positioning rib, 404. First cantilever;

[0062] 5. Elastic elements;

[0063] 6. Inner cylinder; 601. Second elastic element contact surface; 602. Second buckle; 603. Needle tube mounting groove;

[0064] 7. Injection element, 8. Push rod, 9. Pressure block. Detailed Implementation

[0065] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this utility model, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the protection scope of this utility model. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the scope of this utility model.

[0066] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0067] Example 1

[0068] like Figures 1-16As shown in the preferred embodiment of this utility model, a device for concealing and protecting syringe needles includes:

[0069] Outer cylinder 1, used for overall installation and support of the device;

[0070] Inner cylinder 6, used for fixing the injection element;

[0071] The protective sleeve 2 moves along the sliding constraint groove inside the rotating ring 3 to conceal and protect the needle of the syringe 7;

[0072] Rotating ring 3 is used to constrain the movement of protective cylinder 2;

[0073] The pressure ring 4 abuts against the rotating ring 3, causing the rotating ring 3 to rotate to achieve trigger locking protection after use;

[0074] The elastic element 5 provides the reset force for the protective cylinder 2; in this embodiment, the elastic element is a spring.

[0075] Injection element 7, used for injection;

[0076] The push rod 8 is used to push the syringe 7 to achieve injection and trigger the locking protection of the pressure ring 4;

[0077] The protective cylinder 2 is disposed inside the outer cylinder 1 and can move along the axial direction of the outer cylinder 1; one end of the protective cylinder 2 is the needle protrusion end, and the other end is sequentially provided with a rotating ring 3, a pressure ring 4 and an inner cylinder 6; the elastic element 5 is sleeved on the outside of the injection element 7, one end of the elastic element 5 abuts against the protective cylinder 2, and the other end abuts against the inner cylinder 6; the inner wall of the rotating ring 3 is provided with a sliding constraint groove; one end of the injection element 7 is provided with a needle, which passes through the inner cylinder 6, the pressure ring 4 and the rotating ring 3 and extends into the protective cylinder 2; the other end of the injection element 7 is an injection needle tube, which is connected to the inner cylinder 6; the push rod 8 is connected to the injection needle tube through a rubber stopper;

[0078] During the pushing process, the push rod 8 drives the pressure ring 4 to press down, causing the rotating ring 3 to rotate relative to the protective cylinder 2. The elastic element 5 resets the protective cylinder 2, allowing the protective cylinder 2 to slide axially relative to the rotating ring 3. This causes the protective cylinder 2 to move relative to the sliding constraint groove until the locking position is triggered, thus achieving concealment protection of the needle inside the protective cylinder 2.

[0079] The outer cylinder 1 includes a needle protrusion section, a protective cylinder mounting section, and a drive mounting section; one end of the protective cylinder mounting section is connected to the needle protrusion section, and the other end is connected to the drive mounting section, and the diameter of the protective cylinder mounting section gradually shrinks from the connection point with the drive mounting section to the needle protrusion section.

[0080] The outer walls on both sides of the outer cylinder 1 are also provided with cantilever structures to facilitate pushing the push rod 8 during injection.

[0081] Combination Figure 2 , Figure 8 As shown, at least one set of limiting components is provided at the end of the protective cylinder 2 away from the needle protrusion end. The end face of the limiting component is the first elastic element contact surface 202, and the first elastic element contact surface abuts against the elastic element 5.

[0082] The limiting component includes a stop block 201 and a first rib 203; the first rib 203 is disposed on the outer wall of the protective cylinder 2, and the stop block 201 is disposed at a preset distance from the first rib 203 in the circumferential direction.

[0083] During assembly, the stop block 201 is set in the sliding constraint groove, and the stop block 201 drives the protective cylinder 2 to slide relative to each other along the sliding constraint groove;

[0084] The inner wall of the protective cylinder installation section is provided with a protective cylinder limiting rib group 104 and a protective cylinder stop rib 101; the positions of the protective cylinder limiting rib group 104 and the protective cylinder stop rib 101 are respectively matched with the positions of the first rib 203 and the stop block 201.

[0085] After installation, the stop block 201 of the protective cylinder 2 abuts against the protective cylinder stop rib 101. The first rib 203 of the protective cylinder 2 is located in the groove between the protective cylinder limiting rib group 104. The stop block 201, blocked by the protective cylinder stop rib 101, can only move upward, preventing the protective cylinder 2 from detaching from the outer cylinder 1. The first rib 203 can only move up and down within the groove between the protective cylinder limiting rib group 104, so that the protective cylinder 2 can only move along the axial direction of the device, preventing the protective cylinder 2 from rotating.

[0086] Combination Figure 3 As shown, one end of the rotating ring 3 abuts against the protective cylinder stop rib 101, and the other end is configured as a first tooth surface 301, which abuts against the pressure ring 4.

[0087] The sliding constraint groove includes a second rib 305, a third rib 307, and a locking block 302; the second rib 305 is disposed between the locking block 302 and the third rib 307, forming a first sliding groove 306 between the second rib 305 and the third rib 307, and forming a second sliding groove 303 between the second rib 305 and the locking block 302; the bottom of the locking block 302 is provided with a circumferential locking groove 304, which communicates with the second sliding groove 303.

[0088] The axial length of the second rib 305 is equal to or less than the preset axial movement distance of the protective cylinder 2; the axial length of the third rib 307 and the locking block 302 is greater than the preset axial movement distance of the protective cylinder 2.

[0089] Combination Figure 4As shown, one end of the pressure ring 4 is configured as a second tooth surface 401, which abuts against the first tooth surface 301, and the shape of the second tooth surface 401 matches that of the first tooth surface 301; both the first tooth surface 301 and the second tooth surface 302 are helical tooth surfaces.

[0090] The pressure ring 4 is provided with a positioning rib 403 on its side wall, and is connected to the outer cylinder 1 through the positioning rib 403;

[0091] The inner wall of the drive mounting section of the outer cylinder 1 is provided with a positioning groove 105, and the positioning rib 403 is inserted into the positioning groove 105.

[0092] The above structure allows the pressure ring 4 to move only axially relative to the outer cylinder 1 after assembly, and it cannot rotate; during the axial downward pressing process, the second tooth surface 401 contacts the first tooth surface 301, causing the first tooth surface 301 of the rotating ring 3 to slide and rotate along the second tooth surface 401.

[0093] The pressure ring 4 will drive the rotating ring 3 to press down, causing the rotating ring 3 to move relative to the protective cylinder 2. At this time, the stop block 201 moves along the first slide groove 306. When the stop block 201 passes the length of the second rib 305, the rotating ring 3 will rotate along the second tooth surface 401, causing the stop block 201 to move from the first slide groove 306 to the second slide groove 303.

[0094] During actual injection, in the initial state, the stop block 201 of the protective cylinder 2 is in the first groove 306. Under the action of the ribs 305 and 307 on the rotating ring 3, the rotating ring 3 cannot rotate around the axis; as Figure 11 As shown, the toothed surface 301 of the rotating ring 3 and the toothed surface 401 of the pressure ring 4 are in misaligned contact. At the same time, because the other end of the pressure ring 4 abuts against the inner cylinder 6, the pressure ring cannot move axially at this time. Therefore, in the initial state, only the protective cylinder 2 can move axially in the device.

[0095] Combination Figure 6 , Figure 7 As shown, at the end of the pressure ring 4 away from the second tooth surface 401, two first cantilever 404 are symmetrically arranged, and a first buckle 402 is provided on the outer side of the first cantilever 404;

[0096] The drive mounting section has symmetrically arranged first fasteners 103 on its sidewalls, and a transition block 102 is provided on the inner wall of the drive mounting section at the top of the first fasteners 103.

[0097] In the initial state, the first buckle 402 is in contact with the transition block 102. During the pressing process, the first buckle 402 passes over the transition block 102. After the injection is completed, the first buckle 402 engages in the first buckle position 103, thereby locking the pressure ring 4 axially.

[0098] Combination Figure 5As shown, one end of the inner cylinder 6 is the contact surface 601 of the second elastic element, which abuts against the elastic element 5; the other end is symmetrically provided with two second cantilever arms, and the outer side of the second cantilever arm is provided with a second buckle 602.

[0099] The side wall of the drive mounting section is symmetrically provided with second fastening positions 106, and the second buckle 602 is engaged in the second fastening positions 106; and the second fastening positions 106 and the first fastening positions 103 are staggered.

[0100] The inner cylinder 6 has pressure channels on both sides. In the initial state, the first cantilever 404 passes through the pressure channels and is fastened to the transition block 102.

[0101] Combination Figure 9 , Figure 10 As shown, the purpose of the above structure is to fix the inner cylinder 6 and the outer cylinder 1 relative to each other. In the initial state, the axial movement of the pressure ring 4 is restricted by the inner cylinder 6, preventing the pressure ring 4 from disengaging from the device. During the pressing process, the push rod 8 contacts the first cantilever 404 extending from the inner cylinder 5, driving the first cantilever 404 to press down along the pressing channel until the injection is completed. The first buckle 402 on the outside of the first cantilever 404 engages with the first buckle 103, thereby locking the pressure ring 4 axially.

[0102] The inner cylinder 6 has a needle mounting groove 603 on its inner side, and the tail of the injection needle has a flange. The flange engages with the needle mounting groove 603, so that the injection needle is fixed relative to the inner cylinder 6.

[0103] like Figure 12 As shown, this is the state when the device in this embodiment is first inserted into the affected area. In this state, the protective cylinder 2 moves to... Figure 12 At the position shown, the second rib 305 on the rotating ring 3 is passed by the stop block 201 of the protective cylinder 2, while the third rib 307 is not passed. At this time, the rotating ring 3 can rotate to transfer the stop block 201 of the protective cylinder 2 from the first slide groove 306 to the second slide groove 303.

[0104] like Figure 13 As shown, the syringe 7 completes injection under the action of the push rod 8. During the movement of the push rod 8, the first cantilever 404 of the pressure ring 4 abuts against the push rod 8, and the pressure ring 4 is pressed down under the action of the push rod 8. During the movement, the second tooth surface 401 of the pressure ring 4 and the first tooth surface 301 of the rotating ring 3 are always in contact and slide relative to each other. Figure 14 As shown, the rotating ring 3 rotates a certain angle relative to the entire device. At this time, the stop block 201 of the protective cylinder 2 is transferred from the first slide groove 306 to the second slide groove 303.

[0105] The push rod 8 is provided with a pressure plate at its tail end. The size of the pressure plate matches that of the first cantilever 404. During the downward pressing process, the push rod 8 contacts the first cantilever 404 through the pressure plate, thereby driving the pressure ring 4 to press down.

[0106] When the device has finished injecting and is away from the affected area, the protective cylinder 2, under the action of the elastic element 5, moves along the second sliding groove 303 until the stop block 201 abuts against the protective cylinder stop rib 101 of the outer cylinder 1; at this time, the push rod 8 is pushed further, causing the pressure ring 4 to continue to press down, and the second tooth surface 401 of the pressure ring 4 and the first tooth surface 301 of the rotating ring 3 slide relative to each other. Figure 16 The state shown is the locked state. In this state, the stop block 201 of the protective cylinder 2 has moved from the second slide groove 303 into the locking groove 304, as shown. Figure 15 As shown, at this time, one end of the stop block 201 abuts against the protective cylinder stop rib 101 of the outer cylinder 1, and the other end is constrained by the groove 304 of the rotating ring. The rotating ring 3 is completely abutted by the pressure ring 4. The pressure ring 4 is axially locked in the locked state. Under the combined action, the protective cylinder 2 is axially locked, so that the needle is no longer exposed.

[0107] Example 2

[0108] In this embodiment, the appearance of the outer cylinder 1 can be customized compared to that in Embodiment 1, and a pressure block 9 is added and fitted onto the push rod 8.

[0109] like Figure 17 As shown, the two cantilever structure of Embodiment 1 can be adjusted to a two-ring structure; with the internal structure unchanged, the customized adjustment of the appearance can make the product more widely applicable.

[0110] like Figure 17 As shown, by adding pressure block 9, push rod 8 can be replaced with a standard product, eliminating the need for a custom-made large-sized tail pressure plate. At a certain stage of injection, push rod 8 connects to pressure block 9, and pressure block 9 connects to the first cantilever 404 of pressure ring 4. During subsequent injection, push rod 8 pushes pressure block 9, which in turn pushes pressure ring 4 downwards, achieving the same functional effect as before the addition.

[0111] Based on the added pressure block 9, the needle locking function can be optimized by adjusting the dimensions of the first cantilever 404 and the first buckle 402 of the pressure ring 4.

[0112] like Figure 18 As shown, under the action of push rod 8 and pressure block 9, injection element 7 completes injection. During the movement of push rod 8, the first cantilever 404 of pressure ring 4 abuts against push rod 8, and pressure ring 4 is pressed down under the action of push rod 8; when injection is completed, the first cantilever 404 is engaged into the first latch 103, and the first cantilever 404 undergoes a certain deformation, such as... Figure 19As shown. During the movement, the second tooth surface 401 of the pressure ring 4 and the first tooth surface 301 of the rotating ring 3 remain in contact and slide relative to each other. Figure 14 As shown, the rotating ring 3 rotates a certain angle relative to the entire device. At this time, the stop block 201 of the protective cylinder 2 is transferred from the first slide groove 306 to the second slide groove 303.

[0113] When the device has finished injecting and is away from the affected area, the protective cylinder 2 moves along the second slide groove 303 under the action of the elastic element 5 until the stop block 201 abuts against the protective cylinder stop rib 101 of the outer cylinder 1; at this time, the first cantilever 404 of the pressure ring 4 deforms and returns to its original position, becoming Figure 20 As shown, synchronously, under the force of deformation recovery, the pressure ring 4 continues to push downwards, and the second tooth surface 401 of the pressure ring 4 and the first tooth surface 301 of the rotating ring 3 slide relative to each other until... Figure 16 The state shown is the locked state. In this state, the stop block 201 of the protective cylinder 2 has moved from the second slide groove 303 into the locking groove 304, as shown. Figure 15 As shown, at this time, one end of the stop block 201 abuts against the protective cylinder stop rib 101 of the outer cylinder 1, and the other end is constrained by the groove 304 of the rotating ring. The rotating ring 3 is completely abutted by the pressure ring 4. The pressure ring 4 is axially locked in the locked state. Under the combined action, the protective cylinder 2 is axially locked, so that the needle is no longer exposed.

[0114] Compared to Embodiment 1, the step of continuing to push the push rod 8 after the device has finished injecting and moved away from the affected area is omitted.

[0115] Example 3

[0116] A syringe, including the device for concealing and protecting the syringe needle as described in Embodiment 1 or Embodiment 2.

[0117] In summary, during use, the injection elements of this invention are concealed within the protective sleeve, reducing the psychological impact of the needle on the patient and enhancing the effectiveness of needle protection. The locking of the needle after injection also prevents the syringe from being reused, making the device safer and more convenient.

[0118] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A device for concealing and protecting syringe needles, characterized in that, include: Outer cylinder, protective cylinder, rotating ring, pressure ring, elastic element, inner cylinder, injection element, and push rod; The protective cylinder is located inside the outer cylinder and can move along the axial direction of the outer cylinder. One end of the protective cylinder is the needle protrusion end, and the other end is sequentially provided with a rotating ring, a pressure ring, and an inner cylinder. The inner wall of the rotating ring is provided with a sliding constraint groove, and the protective cylinder moves relative to the sliding constraint groove in the rotating ring. The pressure ring abuts against the rotating ring, driving the rotating ring to rotate, realizing the trigger locking protection after use. The elastic element is sleeved on the outside of the injection element, with one end of the elastic element abutting against the protective cylinder and the other end abutting against the inner cylinder, providing the reset power for the protective cylinder. One end of the injection element is equipped with a needle, which passes through the inner cylinder, the pressure ring, and the rotating ring before extending into the protective cylinder. The other end of the injection element is an injection needle tube. A push rod is connected to the injection needle tube. During the push process, the push rod drives the pressure ring to press down, causing the rotating ring to rotate relative to the protective cylinder. The protective cylinder is reset by an elastic element, allowing the protective cylinder to slide axially relative to the rotating ring. This allows the protective cylinder to move relative to the rotating ring within the sliding constraint groove until the locking position is triggered.

2. The device for concealing and protecting syringe needles according to claim 1, characterized in that, The outer cylinder includes a needle protrusion section, a protective cylinder mounting section, and a drive mounting section; one end of the protective cylinder mounting section is connected to the needle protrusion section, and the other end is connected to the drive mounting section, and the diameter of the protective cylinder mounting section gradually narrows from the connection point with the drive mounting section to the needle protrusion section.

3. The device for concealing and protecting syringe needles according to claim 2, characterized in that, The protective cylinder is provided with at least one set of limiting components on the side away from the needle protrusion end. The end face of the limiting components is the contact surface of the first elastic element, and the contact surface of the first elastic element abuts against the elastic element. The limiting component includes a stop block and a first rib; the first rib is disposed on the outer wall of the protective cylinder, and the stop block is disposed at a preset distance from the first rib in the circumferential direction; the stop block is disposed in the sliding constraint groove, and the stop block drives the protective cylinder to slide relative to each other along the sliding constraint groove; The inner wall of the protective cylinder installation section is provided with a protective cylinder limiting rib group and a protective cylinder stop rib; the positions of the protective cylinder limiting rib group and the protective cylinder stop rib are respectively matched with the positions of the first rib and the stop block.

4. The device for concealing and protecting syringe needles according to claim 3, characterized in that, One end of the rotating ring abuts against the stop rib of the protective cylinder, and the other end is configured as a first toothed surface, which abuts against the pressure ring.

5. The device for concealing and protecting syringe needles according to claim 1, characterized in that, The sliding constraint groove includes a second rib, a third rib, and a locking block; the second rib is disposed between the locking block and the third rib, a first sliding groove is formed between the second rib and the third rib, and a second sliding groove is formed between the second rib and the locking block; a circumferential locking groove is provided at the bottom of the locking block, and the locking groove communicates with the second sliding groove; The axial length of the second rib is equal to or less than the preset axial movement distance of the protective cylinder; the axial length of the third rib and the locking block is greater than the preset axial movement distance of the protective cylinder.

6. The device for concealing and protecting syringe needles according to claim 4, characterized in that, One end of the pressure ring is configured as a second toothed surface, which abuts against the first toothed surface, and the shape of the second toothed surface matches that of the first toothed surface; The pressure ring sidewall is provided with positioning ribs, which are connected to the outer cylinder through the positioning ribs; The inner wall of the drive mounting section is provided with a positioning groove, and the positioning rib is inserted into the positioning groove.

7. The device for concealing and protecting syringe needles according to claim 6, characterized in that, Two first cantilever arms are symmetrically arranged at the end of the pressure ring away from the second tooth surface, and a first buckle is provided on the outer side of the first cantilever arm; The drive mounting section has symmetrically arranged first fasteners on its sidewalls, and a transition block is provided on the inner wall of the drive mounting section at the top of the first fasteners.

8. The device for concealing and protecting syringe needles according to claim 7, characterized in that, One end of the inner cylinder is the contact surface of the second elastic element, which abuts against the elastic element; the other end is symmetrically provided with two second cantilever arms, and the outer side of the second cantilever arms is provided with a second buckle. The sidewall of the drive mounting section is symmetrically provided with second fasteners, and the second buckle is engaged in the second fasteners; and the second fasteners are staggered with the first fasteners.

9. The device for concealing and protecting syringe needles according to claim 8, characterized in that, The inner cylinder has pressure channels on both sides, and the first cantilever passes through the pressure channels and is fastened to the transition block.

10. A syringe, characterized in that, Includes the device for concealing and protecting syringe needles as described in any one of claims 1-9.

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