A needle pushing device and medical apparatus

Abstract

The application belongs to the technical field of medical equipment and relates to a needle pushing device and medical equipment. The needle pushing device comprises a guide needle assembly, a driving assembly and a reset member. The moving path of the guide needle assembly is a first path, the guide needle assembly comprises a guide needle and a guide needle limiter, is provided with a first elastic part, the first elastic part is provided with a first abutting surface, the normal line of the first abutting surface intersects the first path, the first elastic part is provided with a first buckle, the outer sidewall of the guide needle is provided with a fixing groove, the first buckle is buckled in the fixing groove and is used for fixing the guide needle, the driving assembly is used for driving the guide needle limiter to move, the reset member is provided with a first reset protrusion and is used for abutting against the first abutting surface, and the first reset protrusion drives the first buckle to move in a direction away from the fixing groove. A user can control the first reset protrusion to abut against the first abutting surface, so that the first buckle and the fixing groove are separated, the guide needle is thus detached, and the quick disassembly and replacement of the guide needle are realized.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a needle-pushing device and a medical device. Background Technology

[0002] In existing technologies, medical devices typically require intervention within the human body to detect bodily information. For example, a blood glucose patch includes a push-needle device, which comprises a drive assembly that can move up and down, a guide needle for guiding the probe needle into the body, and a transmitter assembly. The transmitter assembly includes a main body that inserts into the skin and transmits bodily information to a terminal, and a probe needle that penetrates the body and measures blood glucose from bodily fluids. The drive assembly pushes the guide needle and transmitter assembly toward the skin, causing the guide needle and probe needle to pierce the skin and the main body to adhere to the user's skin surface.

[0003] Because both the guide needle and the probe needle pierce the skin, the guide needle needs to be removed and replaced before the blood glucose patch can be reused. However, existing blood glucose patches typically require additional parts within the push-pin device to remove the guide needle, and the removal process is complex, resulting in a complex push-pin device structure, high cost, and low guide needle replacement efficiency. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of this application is that the existing push needle device has a complex structure, high cost, and low efficiency in replacing the guide needle.

[0005] To solve the above-mentioned technical problems, the embodiments of this application adopt the following solutions:

[0006] A needle-pushing device, the needle-pushing device comprising:

[0007] A guide pin assembly, wherein the movement path of the guide pin assembly is a first path, the guide pin assembly includes a guide pin and a guide pin limiter, the guide pin limiter is sleeved on the guide pin and is provided with a first elastic part, and a first abutting surface is provided at one end of the first elastic part facing the movement direction of the guide pin assembly, and the normal of the first abutting surface intersects with the first path.

[0008] The first elastic part is provided with a first buckle on the side facing the guide pin, and the outer side wall of the guide pin is provided with a fixing groove. The first buckle is fastened into the fixing groove to fix the guide pin.

[0009] A driving component, the driving component being used to drive the guide pin limiter to move;

[0010] A reset component is provided with a first reset protrusion, which abuts against the first abutment surface and drives the first buckle to move away from the fixing groove, so that the guide pin is disengaged from the guide pin limiter.

[0011] Furthermore, the guide pin limiter is provided with a mounting hole, and both the first buckle and the fixing groove are located within the mounting hole;

[0012] The normal of the first contact surface forms an acute angle with the first path, and the opening direction of the acute angle is toward the direction away from the driving component.

[0013] Furthermore, the reset member is provided with a placement groove, and the orthographic projection of the guide pin is located in the placement groove along the moving direction of the guide pin assembly. The placement groove is used to accommodate the guide pin that has fallen off from the guide pin limiter.

[0014] Furthermore, the drive assembly includes a first limiter, a second limiter, a first elastic element, and a second elastic element, and the outer wall of the guide pin limiter is provided with a snap-fit ​​protrusion;

[0015] The second limiter is provided with a second elastic part, and the second elastic part is provided with a second buckle and a second abutting surface on the side facing the buckle protrusion. The second buckle is engaged with the buckle protrusion to restrict the guide pin limiter from moving in a direction away from the second limiter. The normal of the second abutting surface intersects with the first path.

[0016] The first limiter is provided with a second reset protrusion, which is located on the moving path of the latch protrusion and is used to abut against the second abutment surface, so that the second latch moves away from the latch protrusion, so that the guide pin limiter is disengaged from the second limiter;

[0017] One end of the first elastic member abuts against the first restrictor, and the other end abuts against the second restrictor; one end of the second elastic member abuts against the second restrictor, and the other end abuts against the guide pin restrictor.

[0018] The second limiter is used to move in a direction away from the first limiter, so that the second limiter drives the guide pin assembly to move.

[0019] Furthermore, the pusher device also includes a button assembly, one end of which is connected to the first limiter and the other end is provided with a third buckle. The outer side wall of the second limiter is provided with a first positioning groove, and the third buckle is engaged with the first positioning groove to restrict the second limiter from moving away from the first limiter.

[0020] The button assembly is used to rotate or move relative to the first limiter to engage or disengage the third buckle from the first positioning groove.

[0021] Furthermore, the pusher device also includes a third elastic element and a rotating shaft. The outer side wall of the first limiter is provided with a mounting groove. The rotating shaft passes through the side wall of the mounting groove and the button assembly to rotatably connect the button assembly and the first limiter.

[0022] The third elastic element and the third buckle are located at the two ends of the rotating shaft, with the third elastic element abutting against the first limiter at one end and against the button assembly at the other end.

[0023] Furthermore, the side of the second reset protrusion facing the second limiter is an arc surface; and / or,

[0024] The side of the buckle protrusion facing the second limiter is curved; and / or,

[0025] The side of the guide pin facing the guide pin limiter is an arc surface.

[0026] Furthermore, the pusher device also includes a launching assembly, which includes a main body and a probe connected to each other. The main body abuts against the side of the second limiter away from the first limiter and is used to cover the surface of an external object. The guide pin passes through the main body, and the probe pin is located inside the guide pin.

[0027] Furthermore, the pusher device also includes a top cover and a housing. The first limiter, the second limiter, and the guide pin limiter are all located inside the housing. The first limiter is engaged with the inner wall of the housing. The top cover is disposed opposite to the second limiter and is fixedly connected to the housing to restrict the guide pin limiter from moving away from the second limiter.

[0028] Accordingly, this application also provides a medical device, which includes the needle-pushing device described in any of the above embodiments.

[0029] Compared with the prior art, the embodiments of this application have the following main advantages:

[0030] When the drive component drives the guide pin limiter to move, the guide pin will move with the guide pin limiter and then penetrate the human skin. Then, the user can control the first reset protrusion to abut against the first abutment surface, so that the first buckle and the fixing groove are separated, and the guide pin is dislodged. Thus, the guide pin can be quickly disassembled with the help of a simple part structure, reducing the cost of the push pin device. Attached Figure Description

[0031] To more clearly illustrate the solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the pusher device in the embodiments of this application;

[0033] Figure 2 This is an exploded view of the pusher device in the embodiments of this application;

[0034] Figure 3 This is a ZX plane sectional view of the pusher device in its initial state in the embodiments of this application;

[0035] Figure 4 This is a ZX plan sectional view of the pusher device in the extended state in the embodiments of this application;

[0036] Figure 5 This is a ZX plan sectional view of the pusher device in this embodiment after the launch component has been launched;

[0037] Figure 6 This is a ZX plan sectional view of the pusher device in this embodiment before the guide pin is disassembled via the reset component;

[0038] Figure 7 This is a ZX plan sectional view of the pusher device in this embodiment of the application after the guide pin is disassembled by the reset component;

[0039] Figure 8 This is a ZY plane sectional view of the pusher device in its initial state in the embodiments of this application;

[0040] Figure 9 This is a ZY plane sectional view of the pusher device in the extended state in the embodiments of this application;

[0041] Figure 10 This is a ZY plane sectional view of the pusher device after it has been pushed out and the guide needle limiter has retracted in the embodiment of this application.

[0042] Figure 11 This is a ZY plane sectional view of the pusher device in this embodiment of the invention when the second limiter is reset by the reset member;

[0043] Figure 12 This is a schematic diagram showing the connection relationship between the first limiter, button assembly, guide pin limiter, and reset member of the push pin device in the embodiments of this application;

[0044] Figure 13This is a schematic diagram of the guide pin limiter according to an embodiment of this application;

[0045] Figure 14 This is a schematic diagram of the structure of the second limiter according to an embodiment of this application;

[0046] Figure 15 This is a schematic diagram of the structure of the first limiter according to an embodiment of this application.

[0047] Figure label:

[0048] First elastic element 10, second elastic element 20, silicone pad 30, guide pin 110, fixing groove 111, guide pin limiter 120, first abutting surface 121, first buckle 122, buckle protrusion 123, reset element 200, first reset protrusion 210, placement groove 220, first limiter 300, second reset protrusion 310, mounting groove 320, second positioning groove 330, second limiter 400, second buckle 410, second abutting surface 420, first positioning groove 430, fourth buckle 440, first button 510, third buckle 511, second button 520, third elastic element 610, rotating shaft 620, transmitting assembly 700, main body 710, probe pin 720, top cover 800, outer shell 900. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application.

[0050] In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or operating state, specifically the orientation shown in the accompanying drawings; while "inner" and "outer" refer to the outline of the device. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc., are used merely as illustrative purposes and do not impose numerical requirements or establish a numerical order.

[0051] In this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural.

[0052] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one," "at least one of the following," or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, "at least one of a, b, or c," or "at least one of a, b, and c," can both mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can be single or multiple.

[0053] Various embodiments of this application may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of this application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Furthermore, whenever a numerical range is referred to herein, it means including any referenced number (fraction or integer) within the range referred to. The vertical direction is the Z direction in the figures, and the horizontal and left-right directions are the X directions.

[0054] Please refer to Figures 1 to 7 , Figure 14 This application provides a needle-pushing device, which includes:

[0055] The guide pin assembly has a first path for its movement. The guide pin assembly includes a guide pin 110 and a guide pin limiter 120. The guide pin limiter 120 is sleeved on the guide pin 110 and is provided with a first elastic part. A first abutting surface 121 is provided at one end of the first elastic part facing the direction of movement of the guide pin assembly. The normal of the first abutting surface 121 intersects with the first path.

[0056] A first buckle 122 is provided on the side of the first elastic part facing the guide pin 110, and a fixing groove 111 is provided on the outer side wall of the guide pin 110. The first buckle 122 is fastened in the fixing groove 111 to fix the guide pin 110.

[0057] The drive component is used to drive the guide pin limiter 120 to move;

[0058] The reset member 200 is provided with a first reset protrusion 210, which abuts against the first abutment surface 121 and drives the first latch 122 to move away from the fixing groove 111 so that the guide pin 110 is disengaged from the guide pin limiter 120.

[0059] In this embodiment, the working process of the push pin assembly is as follows. First, please refer to... Figure 3 At this point, the guide pin assembly is in its initial state; next, please refer to... Figure 4 When the drive component moves the guide pin limiter 120, the guide pin 110 will move with the guide pin limiter 120 because it is fixed by the guide pin limiter 120, and thus penetrate the human skin; then, please refer to Figure 5 When the guide needle 110 pierces the human skin, since the guide needle 110 only serves to guide the probe needle 720 into the human body, it does not need to remain in the human body but needs to retract to its initial position. At this time, the push needle device can be controlled to move away from the human body. Finally, only the transmitting component 700 remains on the human body.

[0060] Please refer to Figure 6 At this point, the guide pin assembly is complete. Figure 3 During the retraction process, the user can drive the reset member 200, causing it to move upwards towards the guide pin limiter 120, and causing the first reset protrusion 210 to abut against the first abutment surface 121. Since the normal to the first abutment surface 121 intersects the first path, as the first reset protrusion 210 continues to move towards the first abutment surface 121, the first abutment surface 121 experiences a horizontal force moving away from the guide pin 110. Under the action of this horizontal force, the first elastic portion deforms away from the fixing groove 111, thereby releasing the engagement between the first latch 122 and the fixing groove 111, allowing the guide pin 110 to naturally fall downwards.

[0061] In summary, the pusher device of this application embodiment can efficiently disassemble and replace the guide pin 110 through simple movement of the reset member 200, thus its production and replacement costs are low. It should be understood that the plane containing the first path in this solution can be the ZY plane.

[0062] Further, please refer to Figures 2 to 7 The guide pin limiter 120 is provided with a mounting hole (not marked in the figure), and the first buckle 122 and the fixing groove 111 are both located in the mounting hole;

[0063] The normal of the first contact surface 121 forms an acute angle with the first path, and the opening of the acute angle faces away from the driving component.

[0064] In this embodiment, while ensuring that the first buckle 122 is disengaged from the fixing groove 111, the smaller the angle of the acute angle, the shorter the distance that the first reset protrusion 210 needs to move from bottom to top. Therefore, the depth of the first reset protrusion 210 inserted into the mounting hole can be controlled by adjusting the angle of the acute angle.

[0065] Further, please refer to Figure 6 and Figure 7 The reset member 200 is provided with a placement groove 220. Along the moving direction of the guide pin assembly, the orthographic projection of the guide pin 110 is located in the placement groove 220. The placement groove 220 is used to accommodate the guide pin 110 that has fallen off from the guide pin limiter 120.

[0066] In this embodiment, since the orthographic projection of the guide pin 110 is located within the placement groove 220, when the guide pin 110 falls off, it will fall precisely into the placement groove 220, thereby preventing the guide pin 110 from falling off or accidentally piercing the user's skin. It should be understood that the depth of the placement groove 220 can be greater than or equal to the depth of the guide pin 110, so as to completely accommodate the guide pin 110.

[0067] Furthermore, Figures 6 to 7 The cutting surface and Figures 8 to 11 The cross-section is at a 90-degree angle. Please refer to... Figures 2 to 3 , Figures 8 to 12 , Figures 14 to 15 The drive assembly includes a first limiter 300, a second limiter 400, a first elastic member 10 and a second elastic member 20, and the outer side wall of the guide pin limiter 120 is provided with a snap-fit ​​protrusion 123.

[0068] The second limiter 400 is provided with a second elastic part. The second elastic part is provided with a second buckle 410 and a second abutment surface 420 on the side facing the buckle protrusion 123. The second buckle 410 is engaged with the buckle protrusion 123 to limit the guide pin limiter 120 from moving away from the second limiter 400. The normal of the second abutment surface 420 intersects with the first path.

[0069] The first limiter 300 is provided with a second reset protrusion 310, which is located on the moving path of the latch protrusion 123 and is used to abut against the second abutment surface 420, so that the second latch 410 moves away from the latch protrusion 123, so that the guide pin limiter 120 is disengaged from the second limiter 400.

[0070] One end of the first elastic member 10 abuts against the first limiter 300, and the other end abuts against the second limiter 400; one end of the second elastic member 20 abuts against the second limiter 400, and the other end abuts against the guide pin limiter 120.

[0071] The second limiter 400 is used to move in a direction away from the first limiter 300 so that the second limiter 400 drives the guide pin assembly to move.

[0072] In this embodiment, please refer to Figure 3 and Figure 8At this time, the first elastic element 10 is in a compressed state, and the second limiter 400 is close to the first limiter 300 and is fixed by an external device (button assembly) to prevent it from moving away from the first limiter 300. As shown in the figure, the second latch 410 is engaged with the latch protrusion 123. If the second limiter 400 moves away from the first limiter 300, it will drive the guide pin limiter 120 with the latch protrusion 123 to move.

[0073] Please refer to Figure 9 At this time, the first elastic element 10 is already in the released state, and it provides elastic force to make the second limiter 400 move away from the first limiter 300. During the movement of the second limiter 400, since the second reset protrusion 310 is provided on the first limiter 300, the second abutment surface 420 moves relative to the second reset protrusion 310. When the second reset protrusion 310 contacts the second abutment surface 420, since the normal of the second abutment surface 420 intersects with the first path, the second abutment surface 420 is subjected to a horizontal force, causing the second elastic part to deform in the opposite direction away from the buckle protrusion 123, thereby causing the second buckle 410 to release the buckle protrusion 123 from the engagement relationship.

[0074] Please refer to Figure 10 When the second latch 410 disengages from the latch protrusion 123, the guide needle limiter 120 will move away from the second limiter 400 and disengage. Therefore, during the use of the needle pusher device, once the guide needle 110 moves to pierce the human skin, it can automatically retract, preventing the guide needle 110 from remaining on the human body and causing harm or injury due to accidental contact.

[0075] Please refer to Figure 11 When the reset member 200 pushes the second limiter 400 upwards, the second latch 410 inside the second limiter 400 will move toward the disengaged guide pin limiter 120 until the second latch 410 engages above the latch protrusion 123, thereby restricting the movement of the guide pin limiter 120 again. If it is necessary to drive the guide pin assembly to move again, it is only necessary to drive the second limiter 400 downwards. That is, the pusher device of this embodiment can quickly complete the fastening and installation of the guide pin limiter 120 and the second limiter 400.

[0076] In summary, the pusher device of this application embodiment can realize the automatic retraction function of the guide pin 110, and its guide pin limiter 120 and second limiter 400 have high fastening efficiency. It should be understood that the first elastic element 10 and the second elastic element 20 can be springs. The second elastic part can also be disposed on the guide pin limiter 120, while the snap-fit ​​protrusion 123 is disposed on the second limiter 400. In this case, the cooperation between the second elastic part and the snap-fit ​​protrusion 123 can still limit the movement of the guide pin limiter 120. The plane containing the first path in this solution can be the ZX plane.

[0077] Further, please refer to Figures 1 to 4 and Figure 12 The pusher device also includes a button assembly, one end of which is connected to the first limiter 300 and the other end is provided with a third buckle 511. The outer side wall of the second limiter 400 is provided with a first positioning groove 430, and the third buckle 511 is engaged with the first positioning groove 430 to restrict the second limiter 400 from moving away from the first limiter 300.

[0078] The button assembly is used to rotate or move relative to the first limiter 300 to engage or disengage the third latch 511 from the first positioning groove 430.

[0079] In this embodiment, the button assembly includes a first button 510 and a second button 520. A third latch 511 located on the button assembly can engage with the first positioning groove 430, thereby preventing the second limiter 400 from moving away from the first limiter 300. When the push pin device needs to be activated, it is only necessary to drive the button assembly to rotate, thereby causing the third latch 511 to... Figure 3 Rotating the device to the right from the indicated position until it disengages from the first positioning groove 430 will release the lock on the second limiter 400, thereby allowing the second limiter 400 to drive the guide pin assembly to move downward.

[0080] Further, please refer to Figures 1 to 4 , Figure 12 and Figure 15 The pusher device also includes a third elastic element 610 and a rotating shaft 620. The outer side wall of the first limiter 300 is provided with a mounting groove 320. The rotating shaft 620 passes through the side wall of the mounting groove 320 and the button assembly to rotatably connect the button assembly and the first limiter 300.

[0081] The third elastic element 610 and the third buckle 511 are located at the two ends of the rotating shaft 620, with the third elastic element 610 abutting against the first limiter 300 at one end and against the button assembly at the other end.

[0082] In this embodiment, the third elastic member 610 and the third latch 511 are located at both ends of the rotating shaft 620, and the third elastic member 610 abuts against the first limiter 300 at one end and against the button assembly at the other end, so the third latch 511 is continuously subjected to a direction toward the second limiter 400. Figure 3 The force applied is from the left to the center. Therefore, when the user pushes the second limiter 400 to reset from bottom to top using the reset component 200, the third latch 511 will automatically engage with the first positioning groove 430 without the need for manual activation of the third latch 511, thereby improving the reset efficiency of the pusher device.

[0083] Further, please refer to Figure 6 and Figure 8 The side of the second reset protrusion 310 facing the second limiter 400 is an arc surface; and / or,

[0084] The side of the latch protrusion 123 facing the second limiter 400 is curved; and / or,

[0085] The side of the guide pin 110 facing the guide pin limiter 120 is curved.

[0086] In this embodiment, the side of the second reset protrusion 310 facing the second limiter 400 is an arc surface, which guides the second reset protrusion 310 through the upper end of the second elastic part when the first limiter 300 and the second limiter 400 are installed, reducing the coefficient of friction between the second reset protrusion 310 and the second elastic part, thereby improving the installation efficiency of the push pin device. The side of the latch protrusion 123 facing the second limiter 400 is an arc surface, which guides the second latch 410 to move horizontally when the second latch 410 is re-engaged on the latch protrusion 123, thereby preventing the second latch 410 from colliding and wearing with the latch. The side of the guide pin 110 facing the guide pin limiter 120 is an arc surface, which prevents the guide pin 110 from rigidly contacting and colliding with the first latch 122 and wearing when the guide pin 110 is installed from bottom to top.

[0087] It should be understood that the upper end of the second buckle 410 may be chamfered to mate with the arc surface of the buckle protrusion 123. The lower end of the first buckle 122 may be chamfered to mate with the arc surface of the guide pin 110, and the chamfer at the lower end of the first buckle 122 may be on the same plane as the first abutment surface 121.

[0088] Further, please refer to Figures 2 to 5 The pusher device also includes a launching assembly 700, which includes a body 710 and a probe 720 connected to each other. The body 710 abuts against the side of the second limiter 400 away from the first limiter 300 for attaching to the surface of an external object. A guide needle 110 passes through the body 710, and the probe 720 is located inside the guide needle 110.

[0089] In this embodiment, the main body 710 is used to adhere to the surface of an object, and the probe 720 is used to detect human information. When the transmitting assembly 700 is attached to the second limiter 400, its structure is as follows: Figure 3 As shown, the guide needle 110 passes through the main body 710, and the probe needle 720 is located inside the guide needle 110. After the guide needle 110 guides the probe needle 720 to pierce the human body, the transmitting component 700 will remain on the surface of the human skin, and the guide needle 110 will return to its initial position.

[0090] Further, please refer to Figure 2 , Figures 9 to 10 The pusher device also includes a top cover 800 and a housing 900. The first limiter 300, the second limiter 400, and the guide pin limiter 120 are all located inside the housing 900. The first limiter 300 is engaged with the inner wall of the housing 900. The top cover 800 is disposed opposite to the second limiter 400 and is fixedly connected to the housing 900 to limit the guide pin limiter 120 from moving away from the second limiter 400.

[0091] In this embodiment, the top cover 800 can restrict the guide pin limiter 120 from moving away from the second limiter 400, thereby preventing accidental contact that would cause the guide pin limiter 120 to move too far and fall off, and thus preventing the guide pin 110 from falling off and piercing the user's skin.

[0092] For further details, please refer to... Figures 2 to 15 The installation steps of the pusher device in this application embodiment are as follows:

[0093] First, the first button 510 and the second button 520 are assembled to form a button assembly, and the third elastic member 610 is inserted into the circular groove (not shown in the figure) provided on the second button 520. Then, the button assembly and the third elastic member 610 are placed into the mounting groove 320 of the first limiter 300 and fixedly connected to the first limiter 300 through the rotating shaft 620.

[0094] Next, the second elastic member 20 is placed inside the first restrictor 300, and then the protruding part in the middle of the second restrictor 400 is inserted into the middle of the second elastic member 20, so that one end of the second elastic member 20 abuts against the first restrictor 300 and the other end abuts against the second restrictor 400. At this time, the outer wall of the second restrictor 400 is also provided with a fourth buckle 440, and the outer wall of the first restrictor 300 is also provided with a second positioning groove 330. The fourth buckle 440 can be engaged with the second positioning groove 330, thereby limiting the distance that the second restrictor 400 moves away from the first restrictor 300, thereby preventing the second restrictor 400 from falling off.

[0095] Next, place the silicone pad 30 on the end of the guide pin limiter 120 facing the top cover 800, pass the first elastic member 10 through the first limiter 300, and then place the guide pin limiter 120 into the second limiter 400, so that one end of the first elastic member 10 abuts against the guide pin limiter 120 and the other end abuts against the second limiter 400. At this time, the second latch 410 of the second limiter 400 engages with the latch protrusion 123, thereby allowing the guide pin limiter 120 to move with the second limiter 400.

[0096] Then, the assembled structure is placed inside the housing 900. The first limiter 300 can be fixed to the housing 900 by interference fit or by snap-fit, thus achieving a fixed connection between the first limiter 300 and the housing 900. The top cover 800 can limit the displacement of the guide pin limiter 120, and it can be connected to the housing 900 by snap-fit ​​or interference fit through the ribs on the housing 900.

[0097] Finally, the guide pin 110 is passed through the body 710 of the transmitting assembly 700, so that the guide pin 110 is fitted onto the probe pin 720. Then, the transmitting assembly 700 is attached to the second limiter 400 from bottom to top, so that it is located in the slot within the second limiter 400. After the transmitting assembly 700 is attached to the second limiter 400, the guide pin 110 is also located in the mounting hole, and the first latch 122 is engaged with the guide pin 110, so that the guide pin 110 can move together with the guide pin limiter 120.

[0098] Accordingly, please refer to Figures 1 to 11 This application also provides a medical device, which includes any of the needle-pushing devices described in the above embodiments.

[0099] In this embodiment, because the medical device includes any of the needle-pushing devices described in the above embodiments, the medical device can efficiently disassemble and replace the guide needle 110 through simple movement of the reset member 200, resulting in low production and replacement costs. The medical device includes applicators, injection devices, acupuncture devices, etc.

[0100] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

[0101] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, combinations, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A needle-pushing device, characterized in that, The pusher device includes: A guide pin assembly, wherein the movement path of the guide pin assembly is a first path, the guide pin assembly includes a guide pin and a guide pin limiter, the guide pin limiter is sleeved on the guide pin and is provided with a first elastic part, and a first abutting surface is provided at one end of the first elastic part facing the movement direction of the guide pin assembly, and the normal of the first abutting surface intersects with the first path. The first elastic part is provided with a first buckle on the side facing the guide pin, and the outer side wall of the guide pin is provided with a fixing groove. The first buckle is fastened into the fixing groove to fix the guide pin. A driving component, the driving component being used to drive the guide pin limiter to move; A reset component is provided with a first reset protrusion, which abuts against the first abutment surface and drives the first buckle to move away from the fixing groove so that the guide pin is disengaged from the guide pin limiter. The guide pin limiter is provided with a mounting hole, and the first buckle and the fixing groove are both located in the mounting hole; The normal of the first contact surface forms an acute angle with the first path, and the opening direction of the acute angle is toward the direction away from the driving component; The reset member is provided with a placement groove, and the orthographic projection of the guide pin is located in the placement groove along the moving direction of the guide pin assembly. The placement groove is used to accommodate the guide pin that has fallen off from the guide pin limiter.

2. The pusher device according to claim 1, characterized in that, The drive assembly includes a first limiter, a second limiter, a first elastic element, and a second elastic element, and the outer wall of the guide pin limiter is provided with a snap-fit ​​protrusion; The second limiter is provided with a second elastic part, and the second elastic part is provided with a second buckle and a second abutting surface on the side facing the buckle protrusion. The second buckle is engaged with the buckle protrusion to restrict the guide pin limiter from moving in a direction away from the second limiter. The normal of the second abutting surface intersects with the first path. The first limiter is provided with a second reset protrusion, which is located on the moving path of the latch protrusion and is used to abut against the second abutment surface, so that the second latch moves away from the latch protrusion, so that the guide pin limiter is disengaged from the second limiter; One end of the first elastic member abuts against the first restrictor, and the other end abuts against the second restrictor; one end of the second elastic member abuts against the second restrictor, and the other end abuts against the guide pin restrictor. The second limiter is used to move in a direction away from the first limiter, so that the second limiter drives the guide pin assembly to move.

3. The pusher device according to claim 2, characterized in that, The pusher device further includes a button assembly, one end of which is connected to the first limiter and the other end is provided with a third buckle. The outer side wall of the second limiter is provided with a first positioning groove, and the third buckle is engaged with the first positioning groove to restrict the second limiter from moving away from the first limiter. The button assembly is used to rotate or move relative to the first limiter to engage or disengage the third buckle from the first positioning groove.

4. The pusher device according to claim 3, characterized in that, The pusher device further includes a third elastic element and a rotating shaft. The outer side wall of the first limiter is provided with a mounting groove. The rotating shaft passes through the side wall of the mounting groove and the button assembly to rotatably connect the button assembly and the first limiter. The third elastic element and the third buckle are located at the two ends of the rotating shaft, with the third elastic element abutting against the first limiter at one end and against the button assembly at the other end.

5. The pusher device according to claim 2, characterized in that, The side of the second reset protrusion facing the second limiter is an arc surface; and / or, The side of the buckle protrusion facing the second limiter is curved; and / or, The side of the guide pin facing the guide pin limiter is an arc surface.

6. The pusher device according to claim 2, characterized in that, The pusher device further includes a launching assembly, which includes a main body and a probe connected to each other. The main body abuts against the side of the second limiter away from the first limiter and is used to cover the surface of an external object. The guide pin passes through the main body, and the probe pin is located inside the guide pin.

7. The pusher device according to claim 2, characterized in that, The pusher device also includes a top cover and a housing. The first limiter, the second limiter, and the guide pin limiter are all located inside the housing. The first limiter is engaged with the inner wall of the housing. The top cover is disposed opposite to the second limiter and is fixedly connected to the housing to restrict the guide pin limiter from moving away from the second limiter.

8. A medical device, characterized in that, The medical device includes the needle-throwing device according to any one of claims 1 to 7.

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