CN219110457U

CN219110457U - Rebound type safety injection needle

Info

Publication number: CN219110457U
Application number: CN202223059226.8U
Authority: CN
Inventors: 张洪瑜; 刘建明; 王程明
Original assignee: Anhui Hongyu Wuzhou Medical Manufacturer Co ltd
Current assignee: Anhui Hongyu Wuzhou Medical Manufacturer Co ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-06-02
Anticipated expiration: 2032-11-16

Abstract

The utility model discloses a rebound type safety injection needle which comprises a shell structure, wherein a rebound pressing structure, a transmission structure, a lower stopping block and an inner barrel are sequentially arranged in an inner cavity of the shell structure from top to bottom; an auxiliary block is arranged in the transmission structure, and the lower end of the auxiliary block penetrates through the lower end face of the transmission structure and is matched with the lower stop block; the lower end of the lower stop block is fixedly provided with a needle seat, and the lower end of the needle seat is fixedly provided with an injection needle head in a penetrating way; the lower end of the inner cylinder is provided with a perforation, the perforation is communicated with the inner cavity of the inner cylinder, and the needle seat is in penetrating fit with the perforation; a rebound spring is arranged between the lower end of the lower stop block and the bottom surface of the inner cylinder, and the rebound spring is sleeved on the needle seat; the upper end shell structure of the lower stop block is in contact fit. The rebound type safety injection needle can effectively maintain the safety of medical staff, improve the accuracy and the firmness of injection and reduce the uncomfortable feeling when the needle head of the injection needle is separated from a patient.

Description

Rebound type safety injection needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a rebound type safety injection needle.

Background

An injection needle is a medical device for injecting an injection liquid into a patient. After the injection needle is used, medical staff can put on the needle sleeve to isolate and protect the used needle head, but in the sleeving process of the needle sleeve, the condition that the medical staff is injured by the used needle head is easy to occur due to misoperation, so that the problem of blood infection is caused, the sleeved needle sleeve can also fall off due to external force, and the isolating and protecting of the used needle head is invalid, so that the safety risk is caused. Therefore, we propose a rebound type safety injection needle.

Disclosure of Invention

The utility model mainly aims to provide a rebound type safe injection needle which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the rebound type safety injection needle comprises a shell structure, wherein a rebound pressing structure, a transmission structure, a lower stopping block and an inner barrel are sequentially arranged in an inner cavity of the shell structure from top to bottom; an auxiliary block is arranged in the transmission structure, and the lower end of the auxiliary block penetrates through the lower end face of the transmission structure and is matched with the lower stop block; the lower end of the lower stop block is fixedly provided with a needle seat, and the lower end of the needle seat is fixedly provided with an injection needle head in a penetrating way; the lower end of the inner cylinder is provided with a perforation, the perforation is communicated with the inner cavity of the inner cylinder, and the needle seat is in penetrating fit with the perforation; a rebound spring is arranged between the lower end of the lower stop block and the bottom surface of the inner cylinder, and the rebound spring is sleeved on the needle seat; the upper end shell structure of the lower stop block is in contact fit, and when the lower end of the lower stop block is in contact fit with the shell structure, the rebound spring is in a compression accumulation elastic potential energy state.

Preferably, the shell structure comprises an outer barrel, wherein an installation tube is fixedly arranged at the lower end of the outer barrel, and an inner cavity of the installation tube is communicated with an inner cavity of the outer barrel; the lower stop block and the inner wall of the mounting tube form sliding seal; the inner cylinder is fixedly arranged on the inner cylindrical surface of the mounting tube, the rebound triggering frames are fixedly arranged on the bottom surface of the outer cylinder, and the rebound triggering frames are arranged in a plurality and distributed in an annular array by taking the central line of the outer cylinder as the array center; the rebound trigger frame consists of a rebound trigger block and a connecting arc strip.

Preferably, the longitudinal section of the rebound trigger block is triangular, and the connecting arc strip is made of elastic materials; one end of the connecting arc strip is fixedly connected with the bottom surface of the outer cylinder, and the other end of the connecting arc strip is fixedly connected with the rebound triggering block; one end of the rebound trigger block connected with the connecting arc strip is in contact fit with the upper end of the lower stop block, and when the rebound trigger block is in contact fit with the upper end of the lower stop block, the rebound spring is in a compression accumulation elastic potential energy state.

Preferably, the rebound pressing structure comprises an inner tube, the inner tube is positioned in the outer tube, a connector is fixedly arranged at the lower end of the inner tube, a lower stopping top sheet is fixedly arranged on the inner cylindrical surface of the inner tube, and the lower stopping top sheet is obliquely arranged upwards; and a guard plate is fixedly arranged on the upper side of the inner cylindrical surface of the inner tube, and the guard plate is arranged above the lower stop top sheet.

Preferably, the transmission structure comprises a transmission block, a clamping cavity is formed in the upper end of the transmission block, an installation cavity is formed in the lower end of the transmission block, and a rebound driving block is fixedly arranged at the lower end of the transmission block; the mounting cavity is communicated with the clamping cavity and penetrates through the lower end face of the rebound driving block; a clamping groove is formed in the cavity wall of the mounting cavity; the outer side surface of the auxiliary block is fixedly provided with a clamping ring, and the auxiliary block and the clamping ring are respectively matched with the mounting cavity and the clamping groove.

Preferably, the inner tube and the connector are integrally manufactured, and the inner cavity of the inner tube penetrates through the lower end face of the connector; the connector is arranged in the clamping cavity in a clamping way; the outer surface of the transmission block and the inner surface of the rebound triggering block form inclined plane transmission, when the transmission block moves downwards, the rebound triggering block swings towards the bottom surface of the outer cylinder, so that the connecting arc strip is bent, when the rebound triggering block swings to be separated from the lower stopping block, the rebound spring rebound and resets, so that the auxiliary block, the lower stopping block, the needle seat and the needle head of the injection needle move towards the guard plate in the inner cavity of the inner tube, and the needle head of the injection needle is retracted into the outer shell structure.

Preferably, the upper end surface of the lower stopping top piece is in contact fit with the lower end surface of the lower stopping block, and the needle of the injection needle is kept in the shell structure when the upper end surface of the lower stopping top piece is in contact fit with the lower end surface of the lower stopping block.

Compared with the prior art, the utility model has the following beneficial effects:

1. the safety of medical personnel is effectively maintained: by arranging the needle sleeve which can be sleeved on the mounting tube, the needle sleeve can cover the needle head of the injection needle, so that the needle head of the injection needle and medical staff can be isolated before use, and the medical staff can be protected; through setting up rebound spring, after making rebound trigger piece break away from the contact with the piece that ends down, rebound spring extension resets, with supplementary piece, end down in piece and needle file push into the inner tube, with the syringe needle income to shell structure in, and can not stretch out in the shell structure through the piece that ends down with the cooperation of end down top sheet messenger income to the syringe needle in the shell structure, realize keeping apart the protection to syringe needle after the injection to can be after the injection is accomplished, avoid medical personnel to be injured by the syringe needle after the injection, can thoroughly prevent that medical personnel from contacting the syringe needle after the injection and causing problems such as blood infection, play medical personnel's effect.

2. Improving the accuracy and the firmness of injection: the outer shell structure, the rebound pressing structure, the transmission structure, the inner cylinder, the needle seat, the stopping block and the auxiliary block are made of colorless transparent materials, the outer cylinder is provided with scale marks for indicating the liquid level of the injection, medical staff can clearly observe the liquid level condition in the injection operation process, and in addition, the medical staff can timely control the reaction of a patient according to the liquid level, so that the accuracy and the firmness of injection can be improved.

3. Reducing discomfort: the injection needle head is sprung into the shell structure through the rebound spring, so that the injection needle head is automatically separated from the patient, the manual needle pulling action after injection is reduced, the separation of the injection needle head and the patient is completed instantaneously, the pain of the patient caused by needle pulling can be reduced, and the discomfort can be reduced.

Drawings

FIG. 1 is a cross-sectional view of a rebound spring in a compressed state;

FIG. 2 is a cross-sectional view of the internal structure;

FIG. 3 is a cross-sectional view of the housing structure;

FIG. 4 is a schematic diagram of the structure at A;

FIG. 5 is a cross-sectional view of the rebound pressing structure;

FIG. 6 is a cross-sectional view of the transmission structure;

FIG. 7 is a cross-sectional view of the auxiliary block;

FIG. 8 is a schematic diagram of the structure of the lower block;

FIG. 9 is a cross-sectional view of the structure of the rebound spring in an extended return;

fig. 10 is a schematic view showing the overall structure of a rebound type safety needle according to the present utility model.

In the figure: 1. a housing structure; 2. a rebound pressing structure; 3. a transmission structure; 4. an inner cylinder; 41. perforating; 5. a needle stand; 51. a first liquid guide hole; 6. a lower stop block; 61. a second liquid guide hole; 62. a liquid guiding groove; 7. an auxiliary block; 8. a rebound spring; 9. an injection needle head; 10. a needle sleeve; 11. an outer cylinder; 12. installing a pipe; 13. a rebound trigger frame; 131. a rebound trigger block; 132. connecting arc strips; 21. an inner tube; 22. a connector; 23. a bottom stop top sheet; 24. a guard board; 31. a transmission block; 32. a clamping cavity; 33. a mounting cavity; 331. a clamping groove; 332. a rebound driving block; 71. and a clamping ring.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

1-9, the rebound type safety injection needle comprises a shell structure 1, wherein a rebound pressing structure 2, a transmission structure 3, a lower stopping block 6 and an inner barrel 4 are sequentially arranged in an inner cavity of the shell structure 1 from top to bottom; an auxiliary block 7 is arranged in the transmission structure 3, and the lower end of the auxiliary block 7 penetrates through the lower end face of the transmission structure 3 and is matched with the lower stop block 6; the lower end of the lower stop block 6 is fixedly provided with a needle seat 5, and the lower end of the needle seat 5 is fixedly provided with an injection needle 9 in a penetrating way; the lower end of the inner cylinder 4 is provided with a perforation 41, the perforation 41 is communicated with the inner cavity of the inner cylinder 4, and the needle seat 5 is in penetrating fit with the perforation 41; a rebound spring 8 is arranged between the lower end of the lower stop block 6 and the bottom surface of the inner cylinder 4, and the rebound spring 8 is sleeved on the needle seat 5; the upper end of the lower stop block 6 is in contact engagement with the housing structure 1, and the rebound spring 8 is in a compressed accumulating elastic potential energy state when the lower end of the lower stop block 6 is in contact engagement with the housing structure 1.

It should be noted that, shell structure 1, resilience pressing structure 2, transmission structure 3, inner tube 4, needle file 5, end down piece 6, auxiliary block 7 are made by colorless transparent material, in the injection operation in-process, medical personnel can clearly observe the liquid level situation, and medical personnel also can in time be according to the reaction of liquid level height to accuse patient in addition, improves accuracy and the reliability of injection.

As a further explanation of the above technical solution, the housing structure 1 includes an outer cylinder 11; the outer cylinder 11 is used for loading injection, the outer cylinder 11 is provided with scale marks for indicating the liquid level of the injection, and when the injection operation is not performed, the injection is positioned between the bottom surface of the outer cylinder 11 and the transmission structure 3; the lower end of the outer cylinder 11 is fixedly provided with a mounting tube 12, and the inner cavity of the mounting tube 12 is communicated with the inner cavity of the outer cylinder 11; the lower stop block 6 and the inner wall of the mounting tube 12 form sliding seal, and the lower stop block 6 is in plug-in fit with the upper end of the inner cylinder 4; the inner cylinder 4 is fixedly arranged on the inner cylindrical surface of the mounting tube 12, and the end surface of the inner cylinder 4 is flush with the end surface of the mounting tube 12; the bottom surface of the outer cylinder 11 is fixedly provided with rebound trigger frames 13, the rebound trigger frames 13 are provided with a plurality of rebound trigger frames which are distributed in an annular array by taking the central line of the outer cylinder 11 as the array center, and a gap is reserved between every two adjacent rebound trigger frames 13; in a specific embodiment, at least two rebound trigger frames 13 are provided, and when two rebound trigger frames 13 are provided, the two rebound trigger frames 13 are arranged in 180-degree rotation symmetry; the rebound trigger frame 13 is composed of a rebound trigger block 131 and a connecting arc strip 132. The longitudinal section of the rebound trigger block 131 is triangular, the connecting arc strip 132 is made of elastic material, and the connecting arc strip 132 can be bent and deformed; one end of the connecting arc strip 132 is fixedly connected with the bottom surface of the outer cylinder 11, and the other end is fixedly connected with the rebound trigger block 131; one end of the rebound trigger block 131 connected with the connecting arc strip 132 is in contact fit with the upper end of the lower stop block 6, and when the rebound trigger block 131 is in contact fit with the upper end of the lower stop block 6, the rebound spring 8 is in a compression accumulation elastic potential energy state.

It should be noted that, the lower stop block 6 is a T-shaped cylindrical structure, the upper surface of the lower stop block 6 is a curved surface recessed downward, the lower stop block 6 and the needle seat 5 are integrally formed, the lower stop block 6 is provided with a second liquid guide hole 61 penetrating up and down, the needle seat 5 is provided with a first liquid guide hole 51 penetrating up and down, the upper end of the lower stop block 6 is provided with a liquid guide groove 62, the lowest part of the liquid guide groove 62 is positioned below the bottom surface of the outer cylinder 11, the liquid guide groove 62, the second liquid guide hole 61, the first liquid guide hole 51 and the inner cavity of the needle 9 are sequentially communicated, and the injection liquid positioned in the outer cylinder 11 can enter the needle 9 through the liquid guide groove 62, the second liquid guide hole 61 and the first liquid guide hole 51, and can be injected when the rebound pressing structure 2 is pressed down.

As a further explanation of the above technical solution, the rebound pressing structure 2 includes an inner tube 21, the inner tube 21 is located in the outer tube 11, a connector 22 is fixedly mounted at the lower end of the inner tube 21, a lower stop top sheet 23 is fixedly mounted on the inner cylindrical surface of the inner tube 21, the lower stop top sheet 23 is arranged obliquely upward, the lower stop top sheet 23 is an elastic sheet, and the lower stop top sheets 23 are provided with a plurality of annular arrays distributed with the central line of the inner tube 21 as the array center; in the specific embodiment, at least two lower stop top sheets 23 are provided, and when two lower stop top sheets 23 are provided, the two lower stop top sheets 23 are arranged at intervals; a guard plate 24 is fixedly mounted on the upper side of the inner cylindrical surface of the inner tube 21, and the guard plate 24 is arranged above the lower stop top sheet 23. The upper end surface of the lower stop top piece 23 is in contact fit with the lower end surface of the lower stop block 6, and the injection needle 9 is held in the housing structure 1 when the upper end surface of the lower stop top piece 23 is in contact fit with the lower end surface of the lower stop block 6.

The transmission structure 3 comprises a transmission block 31, the transmission block 31 is positioned in the outer cylinder 11, the transmission block 31 and the inner wall of the outer cylinder 11 form sliding seal, so that the transmission block 31 can slide in the outer cylinder 11, and injection liquid positioned in the outer cylinder 11 cannot leak above the transmission block 31 in the sliding process of the transmission block 31; the upper end of the transmission block 31 is provided with a clamping cavity 32, the lower end of the transmission block 31 is provided with a mounting cavity 33, and the lower end of the transmission block 31 is fixedly provided with a rebound driving block 332; the mounting cavity 33 is communicated with the clamping cavity 32 and penetrates through the lower end face of the rebound driving block 332; the wall of the mounting cavity 33 is provided with a clamping groove 331; the outer side surface of the auxiliary block 7 is fixedly provided with a clamping ring 71, and the auxiliary block 7 and the clamping ring 71 are respectively matched with the mounting cavity 33 and the clamping groove 331; when the auxiliary block 7 and the engagement ring 71 are engaged in the mounting cavity 33 and the engagement groove 331, respectively, a seal is formed between the auxiliary block 7 and the transmission structure 3.

It should be noted that, the inner tube 21 and the connector 22 are integrally formed, and the inner cavity of the inner tube 21 penetrates through the lower end surface of the connector 22 and is communicated with the engaging cavity 32; the connector 22 is arranged in the clamping cavity 32 in a clamping way; when the engagement ring 71 is disengaged upward from the engagement groove 331, the auxiliary block 7 enters the inner tube 21.

The outer surface of the transmission block 31 and the inner surface of the rebound trigger block 131 form an inclined plane transmission, when the transmission block 31 moves down, the rebound trigger block 131 swings to the bottom surface of the outer cylinder 11, so that the connecting arc strip 132 is bent, when the rebound trigger block 131 swings to be out of contact with the stop block 6, the rebound spring 8 rebound and resets, so that the auxiliary block 7, the stop block 6, the needle seat 5 and the needle head 9 move to the guard plate 24 in the inner cavity of the inner tube 21, the needle head 9 is retracted into the outer shell structure 1, and protection after injection is realized.

It should be noted that the utility model also comprises a needle sleeve 10 which is sleeved on the mounting tube 12 before the injection of the needle 9, and covers the needle 9 to realize the protection before the injection

It should be noted that the utility model is a rebound type safety injection needle, which has two initial rotation states when in use; the first initial state is: the lower stopping block 6 is positioned in the mounting tube 12 and is contacted with the end face of the rebound triggering block 131, the rebound spring 8 is compressed, the needle head 9 of the injection needle extends out of the shell structure 1, the transmission structure 3 is close to the bottom surface of the outer barrel 11, and no injection is filled in the outer barrel 11; the second initial state is: unlike the first initial state, the transmission structure 3 is located away from the bottom surface of the outer barrel 11, and the outer barrel 11 contains injection.

When the injection device is used from the first initial state, the needle sleeve is firstly taken down, then the injection needle head 9 is put into the injection bottle, the rebound pressing structure 2 is pulled up, so that negative pressure is formed in the outer cylinder 11, the injection is pumped into the outer cylinder 11, and then injection operation is carried out; when injection operation is carried out, the injection needle head 9 pierces into a patient, then, the rebound pressing structure 2 is pressed down, injection liquid is injected into the patient, the rebound pressing structure 2 is continuously pressed down, the auxiliary block 7 is contacted with the anti-falling block 6 before the transmission block 31 is contacted with the rebound triggering block 131, when the transmission block 31 is contacted with the rebound triggering block 131, the rebound triggering frame 13 starts to bear force, the connection arc strip 132 deforms along with the continuous pressing of the rebound pressing structure 2, the rebound triggering block 131 is outwards turned over, the clamping ring 71 is gradually moved upwards to be separated from the clamping groove 331 along with the further pressing of the rebound pressing structure 2, the clamping ring 71 is separated from the clamping groove 331 before the rebound triggering block 131 is outwards turned to be separated from the anti-falling block 6, the rebound spring 8 is reset to be extended to the original length, the auxiliary block 7, the anti-falling block 6 and the needle seat 5 are pushed into the inner tube 21, the injection needle 9 is enabled to be moved upwards to the upper side of the anti-falling top piece 23, the anti-falling block 6 is prevented from being moved upwards to the upper side of the anti-falling top piece 23, and the needle head 9 is prevented from being extended to the outer side of the anti-falling needle head 1 when the rebound spring 8 stops the anti-falling block 6 is prevented from being separated from the anti-falling down block 6, and the needle head 9 is extended to be extended to the outer side of the outer shell 1.

When the needle sleeve is used from the second initial state, the needle sleeve can be directly removed for injection operation, and the injection operation process in the second initial state is basically consistent with the injection operation process in the first initial state.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a resilience type safety injection needle, includes shell structure (1), its characterized in that: a rebound pressing structure (2), a transmission structure (3), a lower stopping block (6) and an inner cylinder (4) are sequentially arranged in the inner cavity of the shell structure (1) from top to bottom; an auxiliary block (7) is arranged in the transmission structure (3), and the lower end of the auxiliary block (7) penetrates through the lower end face of the transmission structure (3) and is matched with the lower stop block (6); the lower end of the lower stop block (6) is fixedly provided with a needle seat (5), and the lower end of the needle seat (5) is fixedly provided with an injection needle head (9) in a penetrating way; the lower end of the inner cylinder (4) is provided with a perforation (41), the perforation (41) is communicated with the inner cavity of the inner cylinder (4), and the needle seat (5) is in penetrating fit with the perforation (41); a rebound spring (8) is arranged between the lower end of the lower stop block (6) and the bottom surface of the inner cylinder (4), and the rebound spring (8) is sleeved on the needle seat (5); the upper end shell structure (1) of the lower stop block (6) is in contact fit, and when the lower end of the lower stop block (6) is in contact fit with the shell structure (1), the rebound spring (8) is in a compression accumulation elastic potential energy state.

2. A rebound safety needle as set forth in claim 1 wherein: the shell structure (1) comprises an outer barrel (11), wherein an installation pipe (12) is fixedly arranged at the lower end of the outer barrel (11), and the inner cavity of the installation pipe (12) is communicated with the inner cavity of the outer barrel (11); the lower stop block (6) and the inner wall of the mounting pipe (12) form sliding seal; the inner cylinder (4) is fixedly arranged on the inner cylindrical surface of the mounting pipe (12), the rebound triggering frames (13) are fixedly arranged on the bottom surface of the outer cylinder (11), and the rebound triggering frames (13) are arranged in a plurality and distributed in an annular array by taking the central line of the outer cylinder (11) as the array center; the rebound trigger frame (13) is composed of a rebound trigger block (131) and a connecting arc strip (132).

3. A rebound safety needle as set forth in claim 2 wherein: the longitudinal section of the rebound trigger block (131) is triangular, and the connecting arc strip (132) is made of elastic materials; one end of the connecting arc strip (132) is fixedly connected with the bottom surface of the outer cylinder (11), and the other end is fixedly connected with the rebound trigger block (131); one end of the rebound trigger block (131) connected with the connecting arc strip (132) is in contact fit with the upper end of the lower stop block (6), and when the rebound trigger block (131) is in contact fit with the upper end of the lower stop block (6), the rebound spring (8) is in a compression accumulation elastic potential energy state.

4. A rebound safety needle as set forth in claim 3 wherein: the rebound pressing structure (2) comprises an inner tube (21), the inner tube (21) is positioned in the outer tube (11), a connector (22) is fixedly arranged at the lower end of the inner tube (21), a lower stopping top sheet (23) is fixedly arranged on the inner cylindrical surface of the inner tube (21), and the lower stopping top sheet (23) is obliquely arranged upwards; a guard plate (24) is fixedly arranged on the upper side of the inner cylindrical surface of the inner tube (21), and the guard plate (24) is arranged above the lower stop top sheet (23).

5. A rebound safety needle as set forth in claim 4 wherein: the transmission structure (3) comprises a transmission block (31), a clamping cavity (32) is formed in the upper end of the transmission block (31), an installation cavity (33) is formed in the lower end of the transmission block (31), and a rebound driving block (332) is fixedly arranged at the lower end of the transmission block (31); the mounting cavity (33) is communicated with the clamping cavity (32) and penetrates through the lower end face of the rebound driving block (332); a clamping groove (331) is formed in the cavity wall of the mounting cavity (33); the outer side surface of the auxiliary block (7) is fixedly provided with a clamping ring (71), and the auxiliary block (7) and the clamping ring (71) are respectively matched with the mounting cavity (33) and the clamping groove (331).

6. A rebound safety needle as set forth in claim 5 wherein: the inner tube (21) and the connector (22) are integrally manufactured, and the inner cavity of the inner tube (21) penetrates through the lower end face of the connector (22); the connector (22) is arranged in the clamping cavity (32) in a clamping way; the outer surface of the transmission block (31) and the inner surface of the rebound triggering block (131) form inclined plane transmission, when the transmission block (31) moves downwards, the rebound triggering block (131) swings towards the bottom surface of the outer cylinder (11) to enable the connecting arc strip (132) to bend, when the rebound triggering block (131) swings to be separated from contact with the anti-falling block (6), the rebound spring (8) returns to the rebound state, so that the auxiliary block (7), the anti-falling block (6), the needle seat (5) and the injection needle head (9) move towards the guard plate (24) in the inner cavity of the inner tube (21), and the injection needle head (9) is retracted into the shell structure (1).

7. A rebound safety needle as set forth in claim 6 wherein: the upper end face of the lower stopping top piece (23) is in contact fit with the lower end face of the lower stopping block (6), and when the upper end face of the lower stopping top piece (23) is in contact fit with the lower end face of the lower stopping block (6), the injection needle head (9) is kept in the shell structure (1).