Device for hiding and protecting syringe needle and syringe

Abstract

The invention relates to the field of injection devices, in particular to a device for hiding and protecting a syringe needle and a syringe, the device comprises an outer cylinder, a protective cylinder, a rotating ring, a pressing ring, an elastic element, an inner cylinder, an injection element and a push rod; the rotating ring, the pressing ring and the inner cylinder are sequentially arranged at one end of the protective cylinder; the pressing ring abuts against the rotating ring to drive the rotating ring to rotate, and then the protection barrel moves along a sliding restraining groove in the inner side of the rotating ring. The elastic element realizes resetting of the protective cylinder; the injection element penetrates through the inner cylinder, the pressing ring and the rotating ring and then extends into the protection cylinder, and the push rod is connected with the injection element. The push rod drives the pressing ring to press downwards so that the rotating ring can rotate relative to the protection barrel, and then the protection barrel can slide axially and rotate relatively along the restraining groove in the rotating ring under the action of the elastic element till locking is triggered. In the process, the needle head is hidden in the protection cylinder, psychological influence on a patient is weakened, the needle head is effectively protected, and secondary use of the syringe and stabbing of other people by mistake can be avoided by locking the needle head.

Description

Technical Field

[0001] The present invention relates to the field of injection devices, and particularly to a device and a syringe for concealing and protecting a syringe needle. Background Art

[0002] In the medical field, syringes are one of the commonly used medical devices. However, traditional syringes and related technologies have many deficiencies. Currently, in the process of using common syringes, the exposed needle will cause psychological pressure on patients. Especially for some patients who have a fear of needles, this psychological burden may affect the smooth progress of the injection operation.

[0003] In addition, after the injection is completed, the protection measures for the needle of traditional syringes are not perfect enough, and it is easy to cause accidental injuries to medical staff or patients due to accidental contact with the needle. When the device is discarded, the exposed needle also poses a risk of cross-infection.

[0004] To overcome these shortcomings, some syringes with protection devices have emerged on the market. However, the triggering methods of these devices have obvious deficiencies: either the structure is simple but the reliability of needle protection is not high, or it is necessary to trigger the switch with effort to start the protection device; reliable and simple triggering has not been achieved. At the same time, most of them add a single protection function to the syringe, and the added parts do not have other auxiliary functions, and the added parts are not maximally utilized to provide a better experience for users. Summary of the Invention

[0005] In order to overcome the problems existing in the prior art, the purpose of the present invention is to provide a device and a syringe for concealing and protecting a syringe needle.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A device for concealing and protecting a syringe needle, comprising: an outer cylinder, a protection cylinder, a rotating ring, a pressing ring, an elastic element, an inner cylinder, an injection element and a push rod;

[0007] The protection cylinder is arranged inside the outer cylinder and can move axially along the outer cylinder. One end of the protection cylinder is the needle protruding end, and the other end is sequentially provided with a rotating ring, a pressing ring and an inner cylinder; a sliding constraint groove is arranged on the inner wall of the rotating ring, and the protection cylinder relatively moves along the sliding constraint groove inside the rotating ring; the pressing ring abuts against the rotating ring and drives the rotating ring to rotate to achieve triggering and locking protection after use; the elastic element is sleeved outside the injection element, one end of the elastic element abuts against the protection cylinder, and the other end abuts against the inner cylinder to provide a reset power for the protection cylinder;

[0008] One end of the injection element is provided with a needle, which passes through the inner cylinder, the pressing ring and the rotating ring and then extends into the protection cylinder. The other end of the injection element is an injection syringe tube; the push rod is connected to the injection syringe tube. During the pushing process, the push rod drives the pressing ring to press down, so that the rotating ring rotates relative to the protection cylinder; the protection cylinder is reset by an elastic element, so that the protection cylinder axially slides relative to the rotating ring, and further makes the protection cylinder move relative to the sliding constraint groove in the rotating ring until the locking position is triggered.

[0009] The present invention is further configured as: the outer cylinder includes a needle protruding section, a protection cylinder installation section and a drive installation section; one end of the protection cylinder installation section is connected to the needle protruding section, and the other end is connected to the drive installation section. The diameter of the protection cylinder installation section gradually shrinks from the connection with the drive installation section to the needle protruding section.

[0010] The present invention is further configured as: at least one set of limiting components is provided at one end of the protection cylinder away from the needle protruding end. The end face where the limiting components are located is the first elastic element contact surface, and the first elastic element contact surface abuts against the elastic element;

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

[0012] The inner wall of the protection cylinder installation section is provided with a protection cylinder limiting rib group and a protection cylinder stop rib; the positions of the protection cylinder limiting rib group and the protection 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 protection cylinder abuts against the protection cylinder stop rib, and the first rib of the protection cylinder is in the groove between the protection cylinder limiting rib groups. The stop block can only move upward under the block of the protection cylinder stop rib, preventing the protection cylinder from detaching from the outer cylinder. The first rib can only move up and down in the groove between the protection cylinder limiting rib groups, so that the protection cylinder can only move along the axial direction of the device, preventing the protection cylinder from rotating.

[0014] The present invention is further configured as: one end of the rotating ring abuts against the protection cylinder stop rib, and the other end is provided with a first tooth surface, and the first tooth surface abuts against the pressing ring.

[0015] The present invention is further configured as: the sliding constraint groove includes a second rib, a third rib and a locking block; the second rib is arranged 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 arranged at the bottom of the locking block, and the locking groove is communicated 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 protection cylinder; the axial lengths of the third rib and the locking block are greater than the preset axial movement distance of the protection cylinder.

[0017] The present invention is further configured such that: one end of the pressing ring is provided with 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 side wall of the pressing ring is provided with positioning ribs, and is connected to the outer cylinder through the positioning ribs;

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

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

[0021] The above structure enables the pressing ring to only move axially relative to the outer cylinder after assembly and cannot rotate; when the pressing ring is axially pressed down, the second tooth surface contacts the first tooth surface, driving the first tooth surface of the rotating ring to slide and rotate along the second tooth surface.

[0022] During the actual movement process, the pressing ring will drive the rotating ring to press down, causing the rotating ring to move relative to the protection cylinder. At this time, the stop block moves along the first sliding groove. When the stop block exceeds 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 sliding groove to the second sliding groove.

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

[0024] The side wall of the driving installation section is symmetrically provided with first buckling positions, and a transition block is arranged on the inner wall of the driving installation section at the top of the first buckling positions.

[0025] In the initial state of the pressing ring, the first buckle contacts the transition block. During the pressing process, the first buckle passes over the transition block. After the injection is completed, the first buckle is snapped into the first buckling position, enabling the axial locking of the pressing ring.

[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; the other end is symmetrically provided with two second cantilevers, and a second buckle is arranged on the outer side of the second cantilever;

[0027] The side wall of the driving installation section is symmetrically provided with second buckling positions, and the second buckle is snapped into the second buckling positions; and the second buckling positions and the first buckling positions are arranged staggeredly.

[0028] The present invention is further configured such that: pressing channels are provided on both sides of the inner cylinder, and the first cantilever passes through the pressing channels and is buckled on the transition block.

[0029] The purpose of the above structure is that the inner cylinder and the outer cylinder are relatively fixed. In the initial state, the axial movement of the pressing ring is restricted by the inner cylinder to prevent the pressing ring from detaching from the device. During the pressing process, the push rod contacts the first cantilever extending out of the inner cylinder, driving the first cantilever to press downward along the pressing channel until the injection is completed. The first buckle on the outer side of the first cantilever is snapped into the first buckling position, axially locking the pressing ring.

[0030] The present invention is further configured such that: a syringe needle mounting groove is provided inside the inner cylinder, and a flanging is provided at the tail of the injection syringe needle. The flanging is snap-fitted with the syringe needle mounting groove to relatively fix the injection syringe needle and the inner cylinder.

[0031] The present invention also relates to a syringe, including the above device for concealing and protecting the syringe needle.

[0032] In summary, the beneficial effects of the above technical solutions of the present invention are as follows:

[0033] During the injection process and after the injection is completed, the injection syringe needle is hidden inside the protection cylinder, reducing the psychological impact of the syringe needle on the patient and enhancing the effectiveness of protecting the syringe needle.

[0034] Through the cooperation of the protection cylinder with the rotating ring and the pressing ring, the protection cylinder moves to the locking position during the injection process. When pulled out, the elastic force of the elastic element causes the protection cylinder to reset and be locked in place along the sliding restraint groove of the rotating ring, thereby hiding and protecting the syringe needle.

[0035] That is, the present invention can avoid the harm of the syringe needle to the user, and also avoid the harm and cross-infection of the used syringe needle to the handler during the waste treatment process; at the same time, the locking of the syringe needle can also prevent the secondary use of the syringe. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 It is an exploded view of Embodiment 1 of the present invention;

[0038] Figure 2 It is an assembly sectional view of the outer cylinder and the protection cylinder in the initial state of Embodiment 1 of the present invention;

[0039] Figure 3Axonometric sectional view of the rotating ring in the first embodiment of the present invention;

[0040] Figure 4 Axonometric view of the pressing ring in the first embodiment of the present invention;

[0041] Figure 5 Axonometric view of the inner cylinder in the first embodiment of the present invention;

[0042] Figure 6 Assembly schematic diagram of the inner cylinder and the outer cylinder after removing the pressing ring and the push rod in the first embodiment of the present invention;

[0043] Figure 7 Based on the first embodiment of the present invention Figure 6 Assembly schematic diagram of the pressing ring, the inner cylinder and the outer cylinder after installing the pressing ring;

[0044] Figure 8 Sectional view of the initial state in the first embodiment of the present invention;

[0045] Figure 9 Partial sectional view of the initial state in the first embodiment of the present invention;

[0046] Figure 10 Partial sectional view of the locked state in the first embodiment of the present invention;

[0047] Figure 11 Axonometric view of removing the outer cylinder in the initial state in the first embodiment of the present invention;

[0048] Figure 12 Sectional view when preparing for injection after needle insertion in the first embodiment of the present invention;

[0049] Figure 13 Sectional view after injection without removing the needle in the first embodiment of the present invention;

[0050] Figure 14 Partial axonometric view of removing the outer cylinder when not removing the needle after injection in the first embodiment of the present invention;

[0051] Figure 15 Sectional view of the locked state in the first embodiment of the present invention;

[0052] Figure 16 Partial axonometric view of removing the outer cylinder in the locked state in the first embodiment of the present invention;

[0053] Figure 17 Structural schematic diagram of the present invention;

[0054] Figure 18 Schematic diagram of the positions of the pressing block and the first cantilever during injection in the second embodiment of the present invention;

[0055] Figure 19 Schematic diagram of the positions of the pressing block and the first cantilever when the injection process is completed in the second embodiment of the present invention;

[0056] Figure 20 This is a schematic diagram of the positions of the pressing block and the first cantilever when the injection in the second embodiment of the present invention is completed and the device is away from the affected area.

[0057] In the drawings, the list of components represented by each reference numeral is as follows:

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

[0059] 2. Protective cylinder, 201. Stop block, 202. First elastic element contact surface, 203. First rib;

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

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

[0062] 5. Elastic element;

[0063] 6. Inner cylinder, 601. Second elastic element contact surface, 602. Second buckle, 603. Syringe needle installation groove;

[0064] 7. Injection element, 8. Pusher rod, 9. Pressing block. Detailed implementation manners

[0065] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments of the present invention, other similar embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention. In addition, the directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only references to the directions in the drawings. Therefore, the directional terms used are for illustration rather than to limit the present invention.

[0066] The present invention will be further described below in conjunction with the drawings and preferred embodiments.

[0067] Embodiment 1

[0068] As Figures 1 - 16 shown, it is a preferred embodiment of the present invention. A device for syringe needle concealment and protection includes:

[0069] The outer cylinder 1, which is used for the installation and support of the whole device;

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

[0071] Protection cylinder 2, moving along the sliding constraint groove in the rotating ring 3, for concealing and protecting the needle of the syringe 7;

[0072] Rotating ring 3, for the movement constraint of the protection cylinder 2;

[0073] Pressing ring 4, abutting against the rotating ring 3, driving the rotating ring 3 to rotate to achieve trigger locking protection after use;

[0074] Elastic element 5, providing a reset power for the protection cylinder 2; in this embodiment, the elastic element is a spring.

[0075] Injection element 7, for injection;

[0076] Pusher rod 8, for pushing the syringe 7 to achieve injection and trigger the locking protection of the pressing ring 4;

[0077] The protection cylinder 2 is arranged inside the outer cylinder 1 and can move axially along the outer cylinder 1; one end of the protection cylinder 2 is the needle protruding end, and the other end is sequentially provided with a rotating ring 3, a pressing ring 4 and an inner cylinder 6; the elastic element 5 is sleeved outside the injection element 7, one end of the elastic element 5 abuts against the protection 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, the needle passes through the inner cylinder 6, the pressing ring 4 and the rotating ring 3 and then extends into the protection cylinder 2, the other end of the injection element 7 is an injection needle tube, and the injection needle tube is connected to the inner cylinder 6; the pusher rod 8 is connected to the injection needle tube through a rubber stopper;

[0078] During the pushing process of the pusher rod 8, the pressing ring 4 is driven to press down, so that the rotating ring 3 rotates relative to the protection cylinder 2, the protection cylinder 2 is reset by the elastic element 5, so that the protection cylinder 2 slides axially relative to the rotating ring 3, and then the protection cylinder 2 moves relative to the sliding constraint groove until the trigger lock position is triggered, realizing the concealed protection of the needle inside the protection cylinder 2.

[0079] The outer cylinder 1 includes a needle protruding section, a protection cylinder installation section and a driving installation section; one end of the protection cylinder installation section is connected to the needle protruding section, and the other end is connected to the driving installation section, and the diameter of the protection cylinder installation section gradually shrinks from the connection with the driving installation section to the needle protruding section.[[ID=-29]]

[0080] The outer walls on both sides of the outer cylinder 1 are also provided with cantilever structures, which are convenient for pushing the pusher rod 8 during injection.

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

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

[0083] During assembly, the stop block 201 is arranged in the sliding constraint groove, and the stop block 201 drives the protective cylinder 2 to slide relative to the ground along the sliding constraint groove.

[0084] On the inner wall of the installation section of the protective cylinder, a protective cylinder limiting rib group 104 and a protective cylinder stop rib 101 are provided. The positions of the protective cylinder limiting rib group 104 and the protective cylinder stop rib 101 respectively cooperate 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, and the first rib 203 of the protective cylinder 2 is in the groove between the protective cylinder limiting rib groups 104. The stop block 201 is blocked by the protective cylinder stop rib 101 and 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 in the groove between the protective cylinder limiting rib groups 104, enabling the protective cylinder 2 to only move along the axial direction of the device and preventing the protective cylinder 2 from rotating.

[0086] Combined Figure 3 As shown, one end of the rotating ring 3 abuts against the protective cylinder stop rib 101, and the other end is set as a first tooth surface 301, and the first tooth surface 301 abuts against the pressing 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 arranged between the locking block 302 and the third rib 307. A first sliding groove 306 is formed between the second rib 305 and the third rib 307, and a second sliding groove 303 is formed between the second rib 305 and the locking block 302. A circumferential locking groove 304 is provided at the bottom of the locking block 302, and the locking groove 304 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 lengths of the third rib 307 and the locking block 302 are greater than the preset axial movement distance of the protective cylinder 2.

[0089] Combined Figure 4As shown, one end of the pressing ring 4 is provided with a second tooth surface 401, the second tooth surface 401 abuts against the first tooth surface 301, and the shapes of the second tooth surface 401 and the first tooth surface 301 are matched; both the first tooth surface 301 and the second tooth surface 302 are spiral tooth surfaces.

[0090] The side wall of the pressing ring 4 is provided with positioning rib strips 403, and the pressing ring 4 is connected to the outer cylinder 1 through the positioning rib strips 403;

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

[0092] The above structure enables the pressing ring 4 to only move axially relative to the outer cylinder 1 after assembly and cannot rotate; when the pressing ring 4 is axially pressed down, the second tooth surface 401 contacts the first tooth surface 301, driving the first tooth surface 301 of the rotating ring 3 to slide and rotate along the second tooth surface 401.

[0093] That is, the pressing ring 4 will drive the rotating ring 3 to press down, causing the rotating ring 3 to move relative to the protection cylinder 2. At this time, the stop block 201 moves along the first chute 306. When the stop block 201 crosses 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 chute 306 to the second chute 303.

[0094] During actual injection, in the initial state, the stop block 201 of the protection cylinder 2 is in the first chute 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 shown, the tooth surfaces 301 of the rotating ring 3 and the tooth surface 401 of the pressing ring 4 are in misaligned contact. At the same time, because the other end of the pressing ring 4 abuts against the inner cylinder 6, the pressing ring cannot move axially at this time. Therefore, in the initial state, only the protection cylinder 2 can move axially in the device.

[0095] Combined with Figure 6 、 Figure 7 As shown, two first cantilevers 404 are symmetrically arranged at one end of the pressing ring 4 away from the second tooth surface 401, and first buckles 402 are arranged on the outer sides of the first cantilevers 404;

[0096] First buckling positions 103 are symmetrically arranged on the side wall of the driving and installing section, and a transition block 102 is arranged on the inner wall of the driving and installing section at the top of the first buckling position 103.

[0097] In the initial state of the pressing ring 4, the first buckle 402 contacts the transition block 102. During the pressing process, the first buckle 402 crosses the transition block 102. After the injection is completed, the first buckle 402 is snapped into the first buckling position 103, locking the pressing ring 4 axially.

[0098] Combined with Figure 5As shown, one end of the inner cylinder 6 is the contact surface 601 of the second elastic element, and the contact surface 601 of the second elastic element abuts against the elastic element 5; at the other end, two second cantilevers are symmetrically arranged, and a second buckle 602 is arranged on the outer side of the second cantilever.

[0099] On the side wall of the driving installation section, second buckle positions 106 are symmetrically arranged, and the second buckle 602 is clamped in the second buckle position 106; and the second buckle position 106 and the first buckle position 103 are staggered.

[0100] On both sides of the inner cylinder 6, a pressing channel is arranged. In the initial state, the first cantilever 404 passes through the pressing channel and is buckled on the transition block 102.

[0101] Combined Figure 9 、 Figure 10 As shown, the purpose of the above structure is to relatively fix the inner cylinder 6 and the outer cylinder 1. In the initial state, the axial movement of the pressing ring 4 is restricted by the inner cylinder 6 to prevent the pressing ring 4 from detaching from the device. During the pressing process, the push rod 8 contacts the first cantilever 404 extending out of 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 outer side of the first cantilever 404 is clamped into the first buckle position 103, locking the pressing ring 4 axially.

[0102] On the inner side of the inner cylinder 6, a syringe needle installation groove 603 is arranged. At the tail of the injection syringe needle, a flanging is arranged, and the flanging is clamped with the syringe needle installation groove 603 to relatively fix the injection syringe needle and the inner cylinder 6.

[0103] As Figure 12 shown, this is the state of the device of this embodiment just piercing into the affected area. In this state, the protection cylinder 2 has moved to the Figure 12 position shown. At this position, the second rib 305 on the rotating ring 3 is exceeded by the stop block 201 of the protection cylinder 2, while the third rib 307 has not been exceeded yet. At this time, the rotating ring 3 can rotate to relatively transfer the stop block 201 of the protection cylinder 2 from the first sliding groove 306 to the second sliding groove 303.

[0104] As Figure 13 shown, under the action of the push rod 8, the syringe 7 has completed the injection. During the movement of the push rod 8, the first cantilever 404 of the pressing ring 4 abuts against the push rod 8, and the pressing ring 4 is pressed down under the action of the push rod 8; during the movement, the second tooth surface 401 of the pressing ring 4 and the first tooth surface 301 of the rotating ring 3 are always in contact and relatively slide to the Figure 14 state shown, that is, the rotating ring 3 rotates a certain angle relative to the whole device. At this time, the stop block 201 of the protection cylinder 2 is relatively transferred from the first sliding groove 306 to the second sliding groove 303.

[0105] A pressing plate is provided at the tail of the push rod 8. The size of the pressing plate is matched with the first cantilever 404. During the downward pressing process of the push rod 8, the push rod 8 contacts the first cantilever 404 through the pressing plate, driving the pressing ring 4 to press downward.

[0106] When the device finishes injection and moves away from the affected area, under the action of the elastic element 5, the protection cylinder 2 moves along the second sliding groove 303 until the stop block 201 abuts against the protection cylinder stop rib 101 of the outer cylinder 1. At this time, when the push rod 8 is continuously pushed, the pressing ring 4 is driven to press downward continuously. Synchronously, the second tooth surface 401 of the pressing ring 4 and the first tooth surface 301 of the rotating ring 3 slide relative to each other until Figure 16 the state shown in the figure is reached, that is, the locking state. At this time, the stop block 201 of the protection cylinder 2 has relatively moved from the second sliding groove 303 to the locking groove 304, as Figure 15 shown. At this time, one end of the stop block 201 abuts against the protection cylinder stop rib 101 of the outer cylinder 1, and the other end is restricted by the groove 304 of the rotating ring 3. The rotating ring 3 is completely abutted by the pressing ring 4. The pressing ring 4 is axially locked in the locking state. Under the combined action, the protection cylinder 2 is axially locked, so that the needle is no longer exposed.

[0107] Embodiment 2

[0108] In this embodiment, compared with the outer cylinder 1 in Embodiment 1, the appearance can be customized, and a pressing block 9 sleeved on the push rod 8 is added.

[0109] As Figure 17 shown, the two-cantilever structure in Embodiment 1 can be adjusted to two-ring structures. Without changing the internal structure, the customized adjustment of the appearance can make the product more widely applicable.

[0110] As Figure 17 shown, by adding the pressing block 9, the push rod 8 can be replaced with a conventional product, and there is no need to customize a large-size tail pressing plate. When injecting to a certain stage, the push rod 8 is in contact with the pressing block 9, and the pressing block 9 is in contact with the first cantilever 404 of the pressing ring 4. During the subsequent injection process, the push rod 8 pushes the pressing block 9 to further push the pressing ring 4 downward to achieve the same functional effect as before the addition.

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

[0112] As Figure 18 shown, when the injection element 7 finishes injection under the action of the push rod 8 and the pressing block 9, during the movement of the push rod 8, the first cantilever 404 of the pressing ring 4 abuts against the push rod 8, and the pressing ring 4 is pressed downward under the action of the push rod 8. When the injection is completed, the first cantilever 404 is clamped into the first buckling position 103, and the first cantilever 404 deforms to a certain extent, as Figure 19As shown. During the movement, the second tooth surface 401 of the pressing ring 4 and the first tooth surface 301 of the rotating ring 3 are always in contact and slide relative to each other until Figure 14 the state shown, that is, the rotating ring 3 rotates a certain angle relative to the whole device. At this time, the stop block 201 of the protective cylinder 2 is relatively transferred from the first sliding groove 306 to the second sliding groove 303.

[0113] When the device finishes injection and moves away from the affected area, under the action of the elastic element 5, the protective cylinder 2 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 first cantilever 404 of the pressing ring 4 deforms and returns to Figure 20 the state shown. Synchronously, under the action of the force of deformation and reset, the pressing ring 4 continues to be pushed down, and the second tooth surface 401 of the pressing ring 4 and the first tooth surface 301 of the rotating ring 3 slide relative to each other until Figure 16 the state shown, that is, the locking state. At this time, the stop block 201 of the protective cylinder 2 relatively moves from the second sliding groove 303 into the locking groove 304, as Figure 15 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 restricted by the groove 304 of the rotating ring. The rotating ring 3 is completely abutted by the pressing ring 4, and the pressing ring 4 is axially locked in the locking state. Under the combined action, the protective cylinder 2 is axially locked, so that the needle is no longer exposed.

[0114] Compared with the first embodiment, the step of continuously pushing the push rod 8 after the device finishes injection and moves away from the affected area is omitted.

[0115] Embodiment 3

[0116] A syringe, comprising the device for syringe needle concealment and protection described in Embodiment 1 or Embodiment 2.

[0117] In summary, during the use of the present invention, the injection elements are all concealed in the protective cylinder, weakening the psychological impact of the needle on the patient, enhancing the effectiveness of needle protection, and the locking of the needle after injection can also prevent the secondary use of the syringe, 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 the present invention, rather than a limitation on the protection scope of the present invention. Any simple modification or equivalent replacement of the technical solution of the present invention by those of ordinary skill in the art does not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A device for syringe needle concealment and protection, characterized in that, Comprising: An outer cylinder, a protective cylinder, a rotating ring, a pressing ring, an elastic element, an inner cylinder, an injection element and a push rod; The protective cylinder is arranged inside the outer cylinder and can move axially along the outer cylinder. One end of the protective cylinder is the needle protruding end, and the other end is sequentially provided with a rotating ring, a pressing ring and an inner cylinder. A sliding restraint groove is arranged on the inner wall of the rotating ring, and the protective cylinder moves relatively along the sliding restraint groove inside the rotating ring. The pressing ring abuts against the rotating ring to drive the rotating ring to rotate, realizing the trigger lock protection after use. The elastic element is sleeved outside the injection element. One end of the elastic element abuts against the protective cylinder, and the other end abuts against the inner cylinder, providing a reset power for the protective cylinder; One end of the injection element is provided with a needle, and the needle penetrates through the inner cylinder, the pressing ring and the rotating ring and then extends into the protective cylinder. The other end of the injection element is an injection syringe. The push rod is connected to the injection syringe. During the pushing process, the push rod drives the pressing ring to press down, so that the rotating ring rotates relative to the protective cylinder. The protective cylinder is reset by the elastic element, so that the protective cylinder axially slides relative to the rotating ring, and further makes the protective cylinder move relatively in the sliding restraint groove inside the rotating ring until the trigger lock position is triggered.

2. The device for syringe needle concealment and protection according to claim 1, characterized in that, The outer cylinder includes a needle protruding section, a protective cylinder installation section and a drive installation section; One end of the protective cylinder installation section is connected to the needle protruding section, and the other end is connected to the drive installation section. The diameter of the protective cylinder installation section gradually shrinks from the connection with the drive installation section to the needle protruding section.

3. The device for syringe needle concealment and protection according to claim 2, characterized in that, At least one group of limiting components is arranged on the side of the protective cylinder away from the needle protruding end. The end face where the limiting components are located is the first elastic element contact surface, and the first elastic element contact surface abuts against the elastic element; The limiting component includes a stop block and a first rib; The first rib is arranged on the outer wall of the protective cylinder, and the stop block is arranged at a preset distance from the first rib in the circumferential direction; The stop block is arranged in the sliding restraint groove, and the stop block drives the protective cylinder to slide relatively along the sliding restraint 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 syringe needle concealment and protection according to claim 3, characterized in that, One end of the rotating ring abuts against the protective cylinder stop rib, and the other end is set as a first tooth surface, and the first tooth surface abuts against the pressing ring.

5. The device for syringe needle concealment and protection according to claim 1, wherein The sliding restraint groove includes a second rib, a third rib and a locking block; The second rib is arranged between the locking block and the third rib. A first chute is formed between the second rib and the third rib, and a second chute is formed between the second rib and the locking block; A circumferential locking groove is arranged at the bottom of the locking block, and the locking groove communicates with the second chute; The axial length of the second rib is equal to or less than the preset axial movement distance of the protective cylinder; The axial lengths of the third rib and the locking block are greater than the preset axial movement distance of the protective cylinder.

6. The device for syringe needle concealment and protection according to claim 4, wherein One end of the pressing ring is set as a second tooth surface, and the second tooth surface abuts against the first tooth surface, and the shapes of the second tooth surface and the first tooth surface are matched; A positioning rib is arranged on the side wall of the pressing ring, and the pressing ring is connected to the outer cylinder through the positioning rib; A positioning groove is arranged on the inner wall of the drive installation section, and the positioning rib is inserted into the positioning groove.

7. The device for syringe needle concealment and protection according to claim 6, wherein At one end of the pressing ring away from the second tooth surface, two first cantilevers are symmetrically arranged, and first buckles are arranged on the outer sides of the first cantilevers; First buckling positions are symmetrically arranged on the side wall of the driving installation section, and a transition block is arranged on the inner wall of the driving installation section at the top of the first buckling position.

8. The device for syringe needle concealment and protection according to claim 7, wherein 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 cantilevers are symmetrically arranged at the other end, and second buckles are arranged on the outer sides of the second cantilevers; Second buckling positions are symmetrically arranged on the side wall of the driving installation section, and the second buckles are clamped in the second buckling positions; and the second buckling positions and the first buckling positions are arranged staggeredly.

9. The device for syringe needle concealment and protection according to claim 8, characterized in that, Pressing channels are arranged on both sides of the inner cylinder, and the first cantilevers pass through the pressing channels and are buckled on the transition blocks.

10. A syringe, characterized in that, Comprising the device for syringe needle concealment and protection according to any one of claims 1-9.

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