Cavity injection device

Abstract

The invention discloses a cavity injection device, and relates to the technical field of medical treatment. The cavity injection device comprises an injection needle, a shell, a needle seat assembly and a lifting driving piece. Wherein the head end of the shell is provided with a plugging port; the injection needle is arranged on the needle base assembly, and the needle base assembly is arranged in the shell in a sliding mode in the first direction. The lifting driving part is arranged on the shell in a sliding mode in the second direction, a non-zero included angle is formed between the second direction and the first direction, the needle base assembly is in contact fit with the lifting driving part, and movement of the lifting driving part in the second direction can push the needle base assembly to move in the first direction so as to drive the injection needle to stretch out of or retract into the shell through the insertion opening; when the cavity injection device is used for filler application, the cavity wall is effectively prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically, to a cavity injection device. Background Art

[0002] An internal injection device usually refers to a device that injects drugs into the patient's body. Correspondingly, the process of injecting drugs for treatment using an injection device is called filler surgery. With the development of medical technology, filler surgery is no longer limited to puncturing the skin to inject drugs into the body. When performing vaginal plastic surgery, vaginal dryness and other diseases, the process of injecting drugs into cavities such as the vagina can also be classified as filler surgery.

[0003] However, the injection needle of the existing injection device is generally exposed to the outside. When filling a cavity with a wrinkled side wall, the injection needle of the injection device may scratch the cavity wall and cause infection during the process of moving the injection device to the injection position.

[0004] In summary, how to avoid damaging the cavity wall when performing filling operations in the cavity is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a cavity injection device, which can effectively avoid damaging the cavity wall when performing a filling operation using the cavity injection device.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A cavity injection device, comprising an injection needle, and further comprising:

[0008] The housing has a plug interface at its head end;

[0009] A needle seat assembly, the injection needle is arranged on the needle seat assembly, and the needle seat assembly is arranged inside the housing to slide along a first direction;

[0010] A lifting drive member is provided on the shell and slides along a second direction, the second direction has a non-zero angle with the first direction, the needle seat assembly contacts and cooperates with the lifting drive member, and the movement of the lifting drive member along the second direction can push the needle seat assembly to move along the first direction, so as to drive the injection needle to extend or retract into the shell through the insertion port.

[0011] Preferably, the lifting drive member comprises a guide rail and a driving part, and the guide rail is provided on the side surface close to the driving part;

[0012] The needle seat assembly is located between the driving parts, and the sliding parts on both sides of the needle seat assembly can slidably cooperate with the corresponding guide rails to drive the needle seat assembly to move along the first direction.

[0013] Preferably, the guide rail includes a first slot segment, a second slot segment and a third slot segment, and the first slot segment, the second slot segment and the third slot segment are connected in sequence and form a Z shape; the first slot segment and the third slot segment both extend along the second direction, and the first slot segment and the third slot segment are staggered along the X direction, and the second slot segment has a non-zero angle with the second direction.

[0014] Preferably, the rear end of the shell has a plug-in hole, and the lifting drive member also includes a pushing part fixedly connected to the driving part, the driving part is located inside the shell, the pushing part extends to the outside of the shell through the plug-in hole, and the pushing part can move along the second direction.

[0015] Preferably, the shell comprises a shell body, a first barrel portion, a second barrel portion and a blocking portion;

[0016] The second barrel portion is located at the head end of the shell body, and the first end of the second barrel portion extends into the inner cavity of the shell body, and the second end extends to the outside of the shell body; the first barrel portion is located in the inner cavity of the shell body, and is connected to the second barrel portion through the blocking portion, and the blocking portion is sealed with the inner wall of the first barrel portion and the inner wall of the second barrel portion;

[0017] The blocking portion has an injection through hole, the first end of the needle seat assembly is slidably inserted in the inner cavity of the first barrel portion, and the second end is slidably inserted in the injection through hole, so that the injection needle extends out or retracts in the second barrel portion, and the needle seat assembly can abut against the blocking portion.

[0018] Preferably, the shell body comprises a base, a top cover, a first limiting rib and a second limiting rib; the top cover is buckled with the base; the inner wall of the base and / or the inner wall of the top cover has the first limiting rib and the second limiting rib, and the first limiting rib and the second limiting rib are both in contact with the lifting drive member to correspondingly limit the movement of the lifting drive member along the first direction and the third direction, and the third direction is perpendicular to the first direction and the second direction;

[0019] And / or, the outer circumferential surface of the shell body has a first mark for knowing the length of the cavity injection device extending into the cavity; the outer circumferential surface of the shell body also has a second mark for knowing the rotation angle of the cavity injection device; the outer circumferential surface of the shell body also has a third mark for knowing the position of the pushing part moving along the plug-in through hole, and the interior of the shell body has a plurality of card slots arranged along the second direction, and the card slots are arranged corresponding to the plurality of identification parts of the third mark, and the lifting drive member has an elastic limiting part, and the elastic limiting part can be selectively inserted into or slid out of the corresponding card slot.

[0020] Preferably, the blocking portion has a negative pressure through hole, and the negative pressure through hole is located between the first cylindrical portion and the second cylindrical portion and is connected to the inner cavity of the second cylindrical portion;

[0021] The first end of the negative pressure tube has a negative pressure port connected to the negative pressure through hole;

[0022] A negative pressure pipe joint is provided at the tail end of the shell body, and the second end of the negative pressure pipe is conductively connected to the negative pressure pipe joint.

[0023] Preferably, the shell also includes a support portion extending along the second direction and located inside the shell body, the first end of the support portion abuts against the second cylindrical portion, the second end extends to the outside of the first cylindrical portion and is connected to the inner wall of the shell body, and the first end of the negative pressure tube is embedded in the groove of the support portion.

[0024] Preferably, a liquid inlet pipe joint is provided at the tail end of the housing;

[0025] The first end of the liquid inlet tube is inserted into the needle seat assembly and is connected to the inner cavity of the needle seat assembly; the second end of the liquid inlet tube is connected to the liquid inlet tube joint;

[0026] The driving part is fixedly connected to the pushing part through a connecting part, and the connecting part has a clearance through hole;

[0027] The first end of the liquid inlet pipe is located between one side of the connecting portion and the negative pressure pipe, and the second end passes through the make way channel and extends to the other side of the connecting portion.

[0028] Preferably, the needle hub assembly comprises a needle hub body and a sealing cover;

[0029] The sealing cover is buckled on the opening side of the needle seat body to close the inner cavity of the needle seat body, and the liquid inlet pipe is arranged on the sealing cover and communicated with the inner cavity of the needle seat body;

[0030] The injection needle is inserted into the bottom wall of the needle seat body, and the first end of the injection needle is connected to the inner cavity of the needle seat body, and the second end of the injection needle is connected to the external environment of the needle seat body.

[0031] The cavity injection device provided by the present invention has a shell with a hollow structure, and a through hole is opened on the side wall of the head end of the shell as an insertion interface. The needle seat assembly is slidably arranged inside the shell along a first direction through a slide groove or a limit column, and during the movement of the needle seat assembly along the first direction, it can drive the injection needle arranged thereon to pass through the insertion interface and extend to the outside of the shell, or retract into the inside of the shell.

[0032] Correspondingly, the lifting drive member is arranged on the shell and can be moved along the second direction through a slide groove or a limit column, and the left end of the lifting drive member contacts and cooperates with the upper end of the needle seat assembly. When in use, the lifting drive member is pushed to move along the second direction to drive the needle seat assembly to drive the injection needle to move along the first direction, so that the injection needle extends to the outside of the shell, or retracts into the inside of the shell. When the cavity injection device needs to be sent into the cavity, the injection needle can be pulled back to the inside of the shell, and when injection is needed, the injection needle can be pushed out of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0034] Figure 1 A cross-sectional view of a specific embodiment provided by the present invention;

[0035] Figure 2 A partial structural cross-sectional view of a specific embodiment provided by the present invention;

[0036] Figure 3 A top view of a specific embodiment provided by the present invention;

[0037] Figure 4 A bottom view of a specific embodiment provided by the present invention;

[0038] Figure 5 An oblique view of a specific embodiment provided by the present invention;

[0039] Figure 6 A schematic diagram of the structure of a lifting drive member and a needle seat assembly according to a specific embodiment of the present invention;

[0040] Figure 7 A schematic diagram of the structure of a lifting drive member according to a specific embodiment of the present invention;

[0041] Figure 8 A partial schematic diagram of another lifting drive member of a specific embodiment provided by the present invention;

[0042] Fig. 9 A partial schematic diagram of another lifting drive member of a specific embodiment provided by the present invention;

[0043] Fig.10 A schematic structural diagram of a needle seat assembly according to a specific embodiment of the present invention;

[0044] Fig.11 A cross-sectional view of a needle hub assembly according to a specific embodiment of the present invention;

[0045] Fig.12 A schematic diagram of a local structure of a specific embodiment provided by the present invention;

[0046] Fig.13 A cross-sectional view of a housing according to a specific embodiment of the present invention;

[0047] Fig.14 A schematic diagram of the structure of a top cover according to a specific embodiment of the present invention;

[0048] Fig.15 A schematic structural diagram of a base according to a specific embodiment of the present invention;

[0049] Fig.16 A schematic diagram of a first identifier and a second identifier of a specific embodiment provided by the present invention;

[0050] Fig.17 A schematic diagram of a third identifier of a specific embodiment provided by the present invention;

[0051] Fig.18 A partial schematic diagram of a lifting drive member and a housing according to a specific embodiment of the present invention.

[0052] Reference numerals:

[0053] 1-housing; 11-housing body; 111-base; 1111-first barrel portion; 1112-second barrel portion; 11121-plug interface; 1113-blocking portion; 11131-injection through hole; 11132-negative pressure through hole; 1114-supporting portion; 112-top cover; 1121-plug through hole; 1122-card slot; 1103-first limiting rib; 1104-second limiting rib;

[0054] 2-needle seat assembly; 21-needle seat body; 22-sealing cover; 221-sliding part;

[0055] 3-lifting driving member; 31-driving part; 311-guide rail; 3111-first slot section; 3112-second slot section; 3113-third slot section; 32-pushing part; 33-connecting part; 331-displacing through hole; 332-elastic limiting part;

[0056] 4-Injection needle;

[0057] 5-negative pressure pipe; 6-negative pressure pipe joint;

[0058] 7-liquid inlet pipe; 8-liquid inlet pipe joint;

[0059] 91-first identification; 92-second identification; 93-third identification;

[0060] X-second direction; Y-first direction; Z-third direction. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] The core of the present invention is to provide a cavity injection device, which can effectively avoid damaging the cavity wall when performing filling operations using the cavity injection device.

[0063] Please refer to Figure 1 The present invention provides a cavity injection device, comprising an injection needle 4, a housing 1, a needle seat assembly 2 and a lifting drive 3. The head end of the housing 1 has an insertion port 11121; the injection needle 4 is arranged on the needle seat assembly 2, and the needle seat assembly 2 is arranged inside the housing 1 to slide along the Y direction; the lifting drive 3 is arranged on the housing 1 to slide along the X direction, and the X direction and the Y direction have a non-zero angle, the needle seat assembly 2 is in contact with the lifting drive 3, and the movement of the lifting drive 3 along the X direction can push the needle seat assembly 2 to move along the Y direction, so as to drive the injection needle 4 to extend or retract into the housing 1 through the insertion port 11121.

[0064] like Figure 1 , Figures 12 to 15 As shown, the shell 1 is a hollow structure, and a through hole is opened on the side wall of the head end of the shell 1 as an insertion interface 11121. The needle seat assembly 2 can be slidably arranged in the Y direction inside the shell 1 through a slide groove or a limit column, and during the movement of the needle seat assembly 2 along the Y direction, it can drive the injection needle 4 arranged thereon to pass through the insertion interface 11121 and extend to the outside of the shell 1, or retract into the inside of the shell 1.

[0065] Correspondingly, the lifting drive member 3 is arranged on the shell 1 and can be moved along the X direction through a slide groove or a limit column, and there is a non-zero angle between the X direction and the Y direction, such as 90 degrees or 135 degrees. The left end of the lifting drive member 3 contacts and cooperates with the upper end of the needle seat assembly 2. When in use, the lifting drive member 3 is pushed to move along the X direction to drive the needle seat assembly 2 to drive the injection needle 4 to move along the Y direction, so that the injection needle 4 extends to the outside of the shell 1, or retracts into the inside of the shell 1. When the cavity injection device needs to be sent into the cavity, the injection needle 4 can be pulled back to the inside of the shell 1, and when injection is needed, the injection needle 4 can be pushed out of the shell 1.

[0066] It should be noted that the cooperation between the needle seat assembly 2 and the lifting drive member 3 is not limited, as long as the needle seat assembly 2 can be pushed by the lifting drive member 3, for example, Figure 2 As shown, both the needle seat assembly 2 and the lifting drive member 3 have wedge-shaped surfaces, and the needle seat assembly 2 and the lifting drive member 3 are driven and matched through their respective wedge-shaped surfaces.

[0067] On the basis of the above-mentioned embodiment, the lifting drive member 3 includes a guide rail 311 and a driving part 31, and the side surfaces close to the driving part 31 are provided with guide rails 311; the needle seat assembly 2 is located between the relative driving parts 31, and the sliding parts 221 on both sides of the needle seat assembly 2 can slide and cooperate with the corresponding guide rails 311 to drive the needle seat assembly 2 to move along the Y direction.

[0068] like Figures 6 to 9 , Fig.12 As shown, the driving part 31 can adopt a sheet structure or a rod structure, etc. The two driving parts 31 are arranged opposite to each other, and a groove structure is provided on the inner side of the two driving parts 31 close to each other as a guide rail 311. Matchingly, cylindrical or truncated cone-shaped protrusions are provided on the upper and lower sides of the needle seat assembly 2 as sliding parts 221, which are inserted into the corresponding guide rail 311, so that the needle seat assembly 2 can be raised and lowered along the Y direction between the driving parts 31 on the guide rail 311.

[0069] When in use, the lifting drive member 3 is pushed to move along the X direction, so that under the guidance of the guide rail 311, the needle seat assembly 2 will not move along the X direction with the lifting drive member 3, but can be lifted and lowered along the Y direction.

[0070] It should be noted that the shape of the guide rail 311 is not limited, as long as it can meet the requirement of driving the needle seat assembly 2 to move along the Y direction, for example, Figure 8As shown, the guide rail 311 can adopt a straight structure with a non-zero angle with the X direction and the Y direction. The guide rail 311 can compensate for the moving distance of the lifting drive member 3 along the X direction, so that the lifting drive member 3 can only be lifted along the Y direction. When in use, if the lifting drive member 3 is pushed to the left to drive the needle seat assembly 2 to descend, then the lifting drive member 3 can be pulled back to the right to drive the needle seat assembly 2 to rise, or, as shown in FIG. Fig. 9 As shown, the guide rail 311 can also adopt a sawtooth-shaped bending structure, and the contour lines of each tooth portion in the guide rail 311 have a non-zero angle with the X direction and the Y direction. When in use, the lifting drive member 3 is continuously pushed toward one side along the X direction. When the sliding portion 221 slides with the contour surface of a tooth portion, the needle seat assembly 2 can be driven to first descend and then ascend, or first ascend and then descend.

[0071] On the basis of the above embodiment, the guide rail 311 includes a first slot section 3111, a second slot section 3112 and a third slot section 3113, which are connected in sequence and form a Z shape; the first slot section 3111 and the third slot section 3113 both extend along the X direction, and the first slot section 3111 and the third slot section 3113 are staggered along the X direction, and the second slot section 3112 has a non-zero angle with the X direction.

[0072] For example, Figure 6 , Figure 7 and Fig.12 As shown, in the guide rail 311, the first slot segment 3111 on the left and the third slot segment 3113 on the right both extend along the X direction, and the entire structure of the first slot segment 3111 is located on the left side of the second slot segment 3112 along the X direction; correspondingly, the second slot segment 3112 is a linear structure, and the second slot segment 3112 is inclined compared to the X direction and the Y direction, the upper end of the second slot segment 3112 is inclined to the left to connect with the right end of the first slot segment 3111 on the left, and the lower end of the second slot segment 3112 is inclined to the right to connect with the left end of the second slot segment 3112 on the right, so that the guide rail 311 in this embodiment is Z-shaped.

[0073] In the process of pushing the lifting drive member 3 to the left to drive the needle seat assembly 2 to descend, in the initial state, the sliding part 221 is located in the first groove section 3111 on the left, and the sliding part 221 slides along the first groove section 3111, the second groove section 3112 and the third groove section 3113 in sequence. In this process, when the sliding part 221 slides along the first groove section 3111, the needle seat assembly 2 stays in place and does not move, and when the sliding part 221 slides along the second groove section 3112, the needle seat assembly 2 can descend along the Y direction until the sliding part 221 slides along the third groove section 3113, and the needle seat assembly 2 descends to the position and does not move; otherwise In the process of pulling the lifting drive member 3 back to the right to drive the needle seat assembly 2 to rise, in the initial state, the sliding portion 221 is located in the third groove section 3113 on the right, and the sliding portion 221 slides along the third groove section 3113, the second groove section 3112 and the first groove section 3111 in sequence. During this process, when the sliding portion 221 slides along the third groove section 3113, the needle seat assembly 2 stays in place and does not move, and when the sliding portion 221 slides along the second groove section 3112, the needle seat assembly 2 can rise along the Y direction until the sliding portion 221 slides along the first groove section 3111, and the needle seat assembly 2 rises to its position and does not move.

[0074] Such a configuration is helpful to prevent the injection needle 4 from slipping off under the action of gravity when the injection needle 4 moves to a state of extending or retracting into the housing 1 .

[0075] Based on the above embodiment, the rear end of the shell 1 has a plug-in hole 1121, and the lifting drive member 3 also includes a pushing portion 32 fixedly connected to the driving portion 31, the driving portion 31 is located inside the shell 1, and the pushing portion 32 extends through the plug-in hole 1121 to the outside of the shell 1, and the pushing portion 32 can move along the X direction.

[0076] like Figure 1 , Figure 4 , Figure 5 , Fig.13 and Fig.15 As shown, a plug-in through hole 1121 is opened on the shell wall of the shell 1. Correspondingly, in the lifting drive member 3, the pushing part 32 is fixedly connected to the driving part 31, and the driving part 31 is arranged inside the shell 1, and the upper end of the pushing part 32 extends to the outside of the shell 1. When in use, the pushing part 32 can be pushed to drive the needle seat assembly 2 to rise and fall along the Y direction.

[0077] It should be noted that the type of the plug-in through hole 1121 is not limited. For example, a linear through hole may be used, or a circular through hole may be used, as long as the driving part 31 can be allowed to move along the X direction according to a preset stroke.

[0078] It should also be noted that the type of the pushing portion 32 is not limited as long as it can be pushed by the operator. For example, in some specific embodiments, the pushing portion 32 can adopt an arched plate body, or, in other specific embodiments, the pushing portion 32 can also adopt a handle, the rod body of the handle passes through the plug-in through hole 1121, and the disc-shaped or rod-shaped handle of the handle is located on the outside of the shell 1.

[0079] On the basis of the above embodiment, the shell 1 includes a shell body 11, a first barrel portion 1111, a second barrel portion 1112 and a blocking portion 1113; the second barrel portion 1112 is located at the head end of the shell body 11, and the first end of the second barrel portion 1112 extends into the inner cavity of the shell body 11, and the second end extends to the outside of the shell body 11; the first barrel portion 1111 is located in the inner cavity of the shell body 11, and is connected to the second barrel portion 1112 through the blocking portion 1113. The barrel portion 1112, and the blocking portion 1113 is sealed with the inner wall of the first barrel portion 1111 and the inner wall of the second barrel portion 1112; the blocking portion 1113 has an injection hole 11131, the first end of the needle seat assembly 2 is slidably inserted in the inner cavity of the first barrel portion 1111, and the second end is slidably inserted in the injection hole 11131, so that the injection needle 4 extends out or retracts in the second barrel portion 1112, and the needle seat assembly 2 can abut against the blocking portion 1113.

[0080] like Figure 1 , Figure 4 , Figure 5 , Fig.13 and Fig.15 As shown, a straight second barrel portion 1112 is provided on the side wall at the left end of the shell body 11, and the second barrel portion 1112 extends along the width direction of the shell body 11, and the upper end of the second barrel portion 1112 is located in the inner cavity of the shell body 11, while the lower end of the second barrel portion 1112 protrudes from the shell body 11, and the opening at the lower end of the second barrel portion 1112 is the above-mentioned plug-in port 11121.

[0081] Correspondingly, the linear first barrel portion 1111 also extends along the width direction of the shell body 11, and the lower end of the first barrel portion 1111 is arranged on the upper end of the second barrel portion 1112 through the blocking portion 1113, the plate-shaped blocking portion 1113 is the end wall of the lower end of the first barrel portion 1111, and the periphery of the blocking portion 1113 protrudes from the first barrel portion 1111, and is sealed with the upper end of the second barrel portion 1112, so that when the cavity injection device is used for injection, the cavity fluid can flow back into the interior of the shell 1; and the part of the plate body of the blocking portion 1113 opposite to the inner cavity of the first barrel portion 1111 is provided with one or more through holes as injection through holes 11131, and the injection through holes 11131 are straight holes or stepped holes, etc., and the upper end of the needle seat assembly 2 can be inserted in the first barrel slidably along the Y direction, and the lower end can be inserted in the injection through hole 11131 slidably along the Y direction.

[0082] In some specific embodiments, Figure 4 , Fig.11 , Fig.13 and Fig.15 As shown, the lower end of the needle seat assembly 2 has a plurality of protruding structures, the injection wheel passes through the corresponding protruding structures, and the plurality of protruding structures are slidably inserted in the corresponding insertion through holes.

[0083] When in use, the lifting drive member 3 is pushed to move along the X direction to drive the needle seat assembly 2 to move along the Y direction, and when the injection needle 4 extends downward to the end position, that is, after the injection needle 4 is extended into place, the needle seat assembly 2 abuts against the blocking portion 1113. Such a configuration is conducive to guiding the needle seat assembly 2 to slide stably along the Y direction, and is conducive to positioning the extended position of the injection needle 4.

[0084] It should be noted that the type of the first barrel portion 1111 is not limited as long as it can guide the needle seat assembly 2 to slide along a preset direction. For example, the first barrel portion 1111 can be a hollow barrel with a rectangular cross-sectional shape, or the first barrel portion 1111 can also be a hollow barrel with a truncated cone cross-sectional shape.

[0085] It should also be noted that the type of the second barrel portion 1112 is not limited, as long as it can meet the requirements of being retracted into the inside for protection and extending to the outside for injection within the preset stroke of the injection needle 4. For example, the second barrel portion 1112 can be a hollow barrel with a rectangular cross-section. Preferably, Figure 4 and Figure 5 As shown, the second barrel portion 1112 can also be a hollow barrel with a long strip cross-section, and both ends of the long strip hollow barrel are rounded structures. Such a configuration is helpful in preventing damage to the patient's cavity when the cavity injection device is used.

[0086] On the basis of the above embodiment, the shell body 11 includes a base 111, a top cover 112, a first limiting rib 1103 and a second limiting rib 1104; the top cover 112 is buckled on the base 111; the inner wall of the base 111 and / or the inner wall of the top cover 112 has a first limiting rib 1103 and a second limiting rib 1104, and the first limiting rib 1103 and the second limiting rib 1104 are both in contact with the lifting drive member 3 to correspondingly limit the movement of the lifting drive member 3 along the Y direction and the Y direction, and the Y direction is perpendicular to the Y direction and the X direction.

[0087] like Figures 12 to 15 As shown, the inner wall of the top cover 112 and / or the base 111 has a protruding structure as a first positioning rib and a second positioning rib. During assembly, after placing each component in the inner cavity of the base 111 and snapping the top cover 112 onto the base 111, the lifting drive member 3 is embedded between the first positioning rib and the second positioning rib, thereby limiting the lifting drive member 3 from moving in the Y and Z directions and moving in the X direction as required.

[0088] It should be noted that the types of the first limiting rib 1103 and the second limiting rib 1104 are not limited, as long as they can achieve the positioning of the lifting drive member 3. For example, in some specific embodiments, reference Figures 12 to 15 In the orientation shown, the bottom wall of the base 111 and the top wall of the top cover 112 are both provided with first limiting ribs 1103, so as to limit the lifting drive member 3 from moving along the Y direction. Similarly, the opposite side walls of the base 111 and the opposite side walls of the top cover 112 are both provided with second limiting ribs 1104, so as to limit the lifting drive member 3 from moving along the Z direction. Alternatively, in other specific embodiments, as Figures 12 to 15 As shown, first limiting ribs 1103 are provided on the top wall of the top cover 112 and the bottom wall of the base 111, second limiting ribs 1104 are provided on the opposite side walls of the base 111, and the first limiting ribs 1103 on the base 111 and the corresponding second limiting ribs 1104 are an integral structure; and it should also be noted that the first limiting ribs 1103 and the second limiting ribs 1104 may be the same or different.

[0089] On the basis of the above-mentioned embodiment, the outer peripheral surface of the housing body 11 has a first mark 91 for obtaining the length of the cavity injection device extending into the cavity; Fig.16 As shown, the first mark 91 includes at least one scale line. It should be noted that the type of the first mark 91 is not limited. For example, in some specific embodiments, the first mark 91 includes a scale line, and the scale line is located at the middle length position of the shell body 11; or, in other specific embodiments, the first mark 91 includes several scale lines, and the several scale lines are evenly or unevenly arranged along the length direction of the shell body 11, so as to assist in determining the specific length of the cavity injection device extending into the cavity.

[0090] On the basis of the above-mentioned embodiment, the outer peripheral surface of the housing body 11 further has a second mark 92 for obtaining the rotation angle of the cavity injection device; Fig.16 As shown, the second identification 92 includes a plurality of scale lines arranged around the center line of the shell body 11. It should be noted that the type of the second identification 92 is not limited as long as the above-mentioned function can be achieved. For example, in some specific embodiments, the second identification 92 includes 12 scale lines, and the angle between any two adjacent scale lines is 30 degrees. Alternatively, in other specific embodiments, the second identification 92 includes 4 scale lines, the first scale line is adjacent to the second scale line and the angle between the two is 45 degrees, the second scale line is adjacent to the third scale line and the angle between the two is 60 degrees, the third scale line is adjacent to the fourth scale line and the angle between the two is 90 degrees, and the fourth scale line is adjacent to the fifth scale line and the angle between the two is 165 degrees.

[0091] On the basis of the above-mentioned embodiment, the outer peripheral surface of the housing body 11 further has a third mark 93 for obtaining the position of the push portion 32 moving along the plug-in through hole 1121; Fig.17 As shown, the third mark 93 is located on the side of the plug-in hole 1121, and is used to determine its position during the process of pushing the part 32. It should be noted that the type of the third mark 93 is not limited, as long as the above-mentioned function can be achieved. For example, the third mark 93 includes a plurality of scale lines evenly arranged along the X direction. During the process of the pushing part 32 moving unit length by unit length along the plug-in hole 1121, the pushing part 32 can reach the position of the next scale line by moving one unit length from the position of the previous scale line; or, the third mark 93 includes a plurality of scale lines unevenly distributed along the X direction, so as to mark the movement gradient of the pushing part 32 along the length direction of the plug-in hole 1121, etc.

[0092] Further, on the basis of the above embodiment, the interior of the shell body 11 has a plurality of slots 1122 arranged along the second direction, and the slots 1122 are arranged corresponding to the plurality of identification parts of the third identification 93. The lifting drive member 3 has an elastic limiting part 332, and the elastic limiting part 332 can be selectively inserted into or slid out of the corresponding slot 1122. The slot can be a groove provided on the inner surface of the shell body or a gap between a plurality of protrusions inside the shell body, etc. The plurality of slots are arranged along the X direction, and the elastic limiting part can be an elastic protrusion of a trapezoidal, triangular or rectangular type. The free end of the elastic limiting part can be inserted into or slid out of the corresponding slot, so that the lifting drive member 3 can be pushed by the pushing part 32 to move the lifting drive member 3 to the corresponding position along the X direction. The moving distance of the lifting drive member 3 can be determined by the identification parts in the third identification 93, and at the same time, the movement of the lifting drive member 3 along the X direction is limited by the elastic limiting part arranged in the corresponding slot.

[0093] On the basis of the above embodiment, the blocking portion 1113 has a negative pressure through hole 11132, which is located between the first cylindrical portion 1111 and the second cylindrical portion 1112, and is connected to the inner cavity of the second cylindrical portion 1112; the first end of the negative pressure tube 5 has a negative pressure port connected to the negative pressure through hole 11132; the tail end of the outer shell body 11 is provided with a negative pressure pipe joint 6, and the second end of the negative pressure tube 5 is conductively connected to the negative pressure pipe joint 6.

[0094] like Fig.13 and Fig.15 As shown, a through hole other than the injection through hole 11131 is opened on the blocking portion 1113 as a negative pressure through hole 11132. The negative pressure through hole 11132 can be a round hole or a square hole, etc., and the negative pressure through hole 11132 is located on the outer side of the first barrel portion 1111 and the inner side of the second barrel portion 1112. The negative pressure through hole 11132 penetrates the blocking portion 1113, so that one end of the negative pressure through hole 11132 is connected to the inner cavity of the second barrel portion 1112, and the other end is connected to the inner cavity of the shell body 11.

[0095] Matching, such as Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figures 12 to 15 As shown, a negative pressure pipe joint 6 is inserted on the side wall at the right end of the shell body 11, and the lower end of the negative pressure pipe joint 6 is connected to the outer environment of the shell body 11, so as to connect external equipment through a pipeline; the upper end of the negative pressure pipe joint 6 is connected to the inner cavity of the shell body 11, and the right end of the negative pressure tube 5 is connected to the upper end of the negative pressure pipe joint 6, and the left end extends to the left end of the shell body 11, and the negative pressure port at the left end of the negative pressure tube 5 is connected to the negative pressure through hole 11132, thereby forming a negative pressure channel inside the cavity injection device, that is, the port of the negative pressure pipe joint 6 located outside the shell 1 is connected to the negative pressure through hole 11132 through the negative pressure tube 5.

[0096] It should be noted that there is no limitation on how the left end of the negative pressure tube 5 is arranged, as long as the airtightness of the negative pressure channel can be ensured. For example, in some specific embodiments, the left end of the negative pressure tube 5 is inserted into the negative pressure through hole 11132; or, in other specific embodiments, Figure 4 As shown, the left end of the negative pressure tube 5 is open, the left end surface of the negative pressure tube 5 is bonded to the outer wall of the second cylindrical portion 1112, and a negative pressure port is opened on the tube wall of the negative pressure tube 5.

[0097] Based on the above embodiment, the shell 1 also includes a support portion 1114 extending along the X direction and located inside the shell body 11, the first end of the support portion 1114 abuts against the second cylindrical portion 1112, the second end extends to the outside of the first cylindrical portion 1111 and is connected to the inner wall of the shell body 11, and the first end of the negative pressure tube 5 is embedded in the groove of the support portion 1114.

[0098] like Fig.13 , Fig.15 As shown, the support portion 1114 adopts a frame structure extending along the X direction, and the left end of the support portion 1114 abuts against the outer wall of the second cylindrical portion 1112. Optionally, the left end of the support portion 1114 is bonded to the first cylindrical portion 1111; the right end of the support portion 1114 extends to the outside of the second cylindrical portion 1112, that is, the inner cavity of the outer shell body 11, and the right end of the support portion 1114 is fixedly connected to the inner wall of the outer shell body 11, and a semicircular or rectangular groove is provided on the support portion 1114, and the left end of the negative pressure tube 5 is embedded in the groove. Such a configuration facilitates the positioning and installation of the negative pressure tube 5.

[0099] It should be noted that the type of the shell 1 is not limited, as long as it can meet the installation requirements of the above-mentioned needle seat assembly 2, negative pressure tube 5, etc., in some specific embodiments, the top cover 112 and the limiting ribs thereon are an integrally formed structure, and the base 111, the first barrel portion 1111, the second barrel portion 1112, the supporting portion 1114, the blocking portion 1113 and the limiting ribs inside the base 111 are an integrally formed structure; or, in other specific embodiments, the second barrel portion 1112, the supporting portion 1114, the corresponding limiting ribs, etc. are glued to the base 111, and the corresponding limiting ribs are glued to the top cover 112.

[0100] On the basis of the above embodiment, a liquid inlet pipe joint 8 is provided at the tail end of the shell 1; the first end of the liquid inlet pipe 7 is inserted into the needle seat assembly 2 and is connected to the inner cavity of the needle seat assembly 2; the second end of the liquid inlet pipe 7 is connected to the liquid inlet pipe joint 8; the driving part 31 is fixedly connected to the pushing part 32 through the connecting part 33, and the connecting part 33 has a clearance through hole 331; the first end of the liquid inlet pipe 7 is located between one side of the connecting part 33 and the negative pressure tube 5, and the second end extends to the other side of the connecting part 33 through the clearance channel.

[0101] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Fig.12As shown, a liquid inlet pipe joint 8 is inserted on the side wall arranged at the right end of the shell body 11. Optionally, the liquid inlet pipe joint 8 is threadedly matched with the shell body 11, and the right end of the liquid inlet pipe joint 8 is connected to the outer environment of the shell body 11, so as to connect external equipment through pipelines, etc.; the left end of the liquid inlet pipe joint 8 is connected to the inner cavity of the shell body 11, and the right end of the liquid inlet pipe 7 is connected to the left end of the liquid inlet pipe joint 8, and the left end of the liquid inlet pipe 7 extends to the left end of the shell body 11, and can be connected to the inner cavity of the needle seat assembly 2 and is arranged on the needle seat assembly 2, thereby forming a liquid delivery channel inside the cavity injection device, that is, the port of the liquid inlet pipe joint 8 located outside the shell 1 is connected to the inner cavity of the needle seat assembly 2 through the liquid inlet pipe 7, so that the injection liquid can be delivered to the inner cavity of the needle seat assembly 2, and the injection liquid can be delivered to the patient through the injection needle 4.

[0102] It should be noted that there is no limitation on how the liquid inlet tube 7 cooperates with the needle hub assembly 2, as long as the inner cavities of the two can be connected. For example, in some specific embodiments, the left end of the liquid inlet tube 7 passes through the side wall of the needle hub assembly 2 to connect to the inner cavity of the needle hub assembly 2, or, in other specific embodiments, the needle hub assembly 2 is provided with a through hole connected to the liquid inlet tube 7, and the left end of the liquid inlet tube 7 is bonded to the needle hub assembly 2, and is connected to the inner cavity of the needle hub assembly 2 through the through hole.

[0103] Further, if Figure 6 to Figure 7 As shown, the pushing portion 32 and the driving portion 31 are connected via a connecting portion 33. The connecting portion 33 may be a flat plate structure or an I-shaped plate structure, etc. A clearance hole 331 is provided on the connecting plate. The clearance hole 331 may be a rectangular hole or a circular hole, etc. The right end of the liquid inlet tube 7 is arranged below the connecting portion 33 and above the negative pressure tube 5, while the left end of the liquid inlet tube 7 passes through the clearance channel and extends to the top of the connecting portion 33, so as to facilitate the connection with the upper end of the needle seat assembly 2.

[0104] On the basis of the above-mentioned embodiment, the needle seat assembly 2 includes a needle seat body 21 and a sealing cover 22; the sealing cover 22 is buckled on the opening side of the needle seat body 21 to close the inner cavity of the needle seat body 21, and the liquid inlet tube 7 is arranged on the sealing cover 22 and is connected to the inner cavity of the needle seat body 21; the injection needle 4 is inserted into the bottom wall of the needle seat body 21, and the first end of the injection needle 4 is connected to the inner cavity of the needle seat body 21, and the second end is connected to the external environment of the needle seat body 21.

[0105] like Fig.10 and Fig.11As shown, the sealing cover 22 is fastened on the needle seat body 21 by a threaded structure or a stopper, etc., to close the upper end opening of the needle seat body 21, thereby preventing the injection liquid from overflowing, and the sealing cover 22 is provided with a connecting through hole, which can be a linear through hole extending along the Y direction, or an L-shaped through hole, and one end of the connecting through hole extends along the X direction and connects to the external environment of the sealing cover 22, and the other end extends along the Y direction and connects to the inner cavity of the needle seat body 21; the left end of the liquid inlet tube 7 is inserted in the connecting through hole, or is glued on the sealing cover 22, etc., so as to be connected to the inner cavity of the needle seat body 21 through the connecting through hole.

[0106] Correspondingly, a through hole is opened in the lower end wall of the needle seat body 21 for the insertion of the injection needle 4, and the lower end of the injection needle 4 protrudes from the needle seat body 21 so as to be able to perform puncture during injection. When in use, the injection liquid is transported to the inner cavity of the needle seat body 21 through the liquid inlet tube 7, and then transported to the patient through the injection needle 4.

[0107] It should be noted that the relational terms such as "first" and "second" mentioned above are merely used to distinguish one entity from other entities, and do not necessarily require or imply any actual relationship or order between these entities; the "upper surface, lower surface, top, bottom" and the directional words "upper, lower, left, right" mentioned above are all defined based on the drawings in the specification.

[0108] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0109] The cavity injection device provided by the present invention is introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A cavity injection device, comprising an injection needle (4), characterized in that: Also includes: The housing (1) has a plug interface (11121) at its head end; A needle seat assembly (2), the injection needle (4) being arranged on the needle seat assembly (2), the needle seat assembly (2) being arranged inside the housing (1) so as to slide along a first direction; A lifting drive member (3) is arranged on the housing (1) and slides along a second direction, the second direction and the first direction have a non-zero angle, the needle seat assembly (2) is in contact with the lifting drive member (3), and the movement of the lifting drive member (3) along the second direction can push the needle seat assembly (2) to move along the first direction, so as to drive the injection needle (4) to extend or retract into the housing (1) through the insertion port (11121).

2. The cavity injection device according to claim 1, characterized in that: The lifting drive member (3) comprises a guide rail (311) and a drive portion (31), and the guide rail (311) is provided on the side surface close to the drive portion (31); The needle seat assembly (2) is located relative to the driving portion (31), and the sliding portions (221) on both sides of the needle seat assembly (2) are capable of slidably engaging with the corresponding guide rails (311) to drive the needle seat assembly (2) to move along the first direction.

3. The cavity injection device according to claim 2, characterized in that: The guide rail (311) comprises a first slot section (3111), a second slot section (3112) and a third slot section (3113); the first slot section (3111), the second slot section (3112) and the third slot section (3113) are connected in sequence and form a Z-shape; the first slot section (3111) and the third slot section (3113) both extend along the second direction, and the first slot section (3111) and the third slot section (3113) are staggered along the X direction, and the second slot section (3112) has a non-zero angle with the second direction.

4. The cavity injection device according to claim 2, characterized in that: The rear end of the housing (1) has a plug-in through hole (1121), and the lifting drive member (3) further comprises a pushing portion (32) fixedly connected to the driving portion (31), the driving portion (31) is located inside the housing (1), the pushing portion (32) passes through the plug-in through hole (1121) and extends to the outside of the housing (1), and the pushing portion (32) is capable of moving along the second direction.

5. The cavity injection device according to claim 4, characterized in that: The housing (1) comprises a housing body (11), a first cylindrical portion (1111), a second cylindrical portion (1112) and a blocking portion (1113); The second cylindrical portion (1112) is located at the head end of the outer shell body (11), and the first end of the second cylindrical portion (1112) extends into the inner cavity of the outer shell body (11), and the second end extends to the outside of the outer shell body (11); the first cylindrical portion (1111) is located in the inner cavity of the outer shell body (11), and is connected to the second cylindrical portion (1112) via the blocking portion (1113), and the blocking portion (1113) is in sealing cooperation with the inner wall of the first cylindrical portion (1111) and the inner wall of the second cylindrical portion (1112); The blocking portion (1113) has an injection through hole (11131), and the first end of the needle seat assembly (2) is slidably inserted into the inner cavity of the first barrel portion (1111), and the second end is slidably inserted in the injection through hole (11131), so that the injection needle (4) extends out or retracts in the second barrel portion (1112), and the needle seat assembly (2) can abut against the blocking portion (1113).

6. The cavity injection device according to claim 5, characterized in that: The shell body (11) comprises a base (111), a top cover (112), a first limiting rib (1103) and a second limiting rib (1104); the top cover (112) is buckled on the base (111); the inner wall of the base (111) and / or the inner wall of the top cover (112) has the first limiting rib (1103) and the second limiting rib (1104), and the first limiting rib (1103) and the second limiting rib (1104) are both in contact with the lifting drive member (3) to correspondingly limit the movement of the lifting drive member (3) along the first direction and a third direction, and the third direction is perpendicular to the first direction and the second direction; And / or, the outer circumferential surface of the shell body (11) has a first mark (91) for obtaining the length of the cavity injection device extending into the cavity; the outer circumferential surface of the shell body (11) also has a second mark (92) for obtaining the rotation angle of the cavity injection device; the outer circumferential surface of the shell body (11) also has a third mark (93) for obtaining the position of the push portion (32) moving along the plug-in through hole (1121), and the interior of the shell body (11) has a plurality of slots (1122) arranged along the second direction, the slots (1122) are arranged corresponding to the plurality of mark portions of the third mark (93), and the lifting drive member (3) has an elastic limiting portion (332), and the elastic limiting portion (332) can be selectively inserted into or slid out of the corresponding slot (1122).

7. The cavity injection device according to claim 5, characterized in that: The blocking portion (1113) has a negative pressure through hole (11132), and the negative pressure through hole (11132) is located between the first cylindrical portion (1111) and the second cylindrical portion (1112), and is connected to the inner cavity of the second cylindrical portion (1112); The first end of the negative pressure tube (5) has a negative pressure port connected to the negative pressure through hole (11132); A negative pressure pipe joint (6) is provided at the rear end of the shell body (11), and the second end of the negative pressure pipe (5) is conductively connected to the negative pressure pipe joint (6).

8. The cavity injection device according to claim 7, characterized in that: The shell (1) further comprises a support portion (1114) extending along the second direction and located inside the shell body (11); a first end of the support portion (1114) abuts against the second cylindrical portion (1112), and a second end extends to the outside of the first cylindrical portion (1111) and is connected to the inner wall of the shell body (11); and a first end of the negative pressure tube (5) is embedded in a groove of the support portion (1114).

9. The cavity injection device according to claim 7, characterized in that: A liquid inlet pipe joint (8) is provided at the rear end of the housing (1); The first end of the liquid inlet tube (7) is inserted into the needle seat assembly (2) and is conductively connected to the inner cavity of the needle seat assembly (2); the second end of the liquid inlet tube (7) is conductively connected to the liquid inlet tube connector (8); The driving portion (31) is fixedly connected to the pushing portion (32) via a connecting portion (33), and the connecting portion (33) has a clearance through hole (331); The first end of the liquid inlet pipe (7) is located between one side of the connecting portion (33) and the negative pressure pipe (5), and the second end passes through the clearance channel and extends to the other side of the connecting portion (33).

10. The cavity injection device according to claim 9, characterized in that: The needle seat assembly (2) comprises a needle seat body (21) and a sealing cover (22); The sealing cover (22) is buckled on the opening side of the needle seat body (21) to seal the inner cavity of the needle seat body (21); the liquid inlet tube (7) is arranged on the sealing cover (22) and is connected to the inner cavity of the needle seat body (21); The injection needle (4) is inserted into the bottom wall of the needle seat body (21), and the first end of the injection needle (4) is connected to the inner cavity of the needle seat body (21), and the second end is connected to the external environment of the needle seat body (21).

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