Negative pressure auxiliary device for puncture needle

Abstract

A puncture needle negative pressure auxiliary device comprises an injector fixing shell, a needle cylinder clamping cavity used for clamping an injector needle cylinder and a push rod sliding cavity communicated with the needle cylinder clamping cavity are formed in the injector fixing shell, and a springback auxiliary mechanism used for driving an injector push rod to move in the push rod sliding cavity is installed in the push rod sliding cavity. The springback assisting mechanism comprises a locking state and a springback state, in the locking state, the push rod moves to the end closest to the needle cylinder along the push rod sliding cavity, and the position where the push rod is located is locked through the locking mechanism; and in the springback state, locking of the locking mechanism on the push rod is relieved, and the push rod continuously moves towards the end away from the needle cylinder along the push rod sliding cavity under the thrust action of the springback auxiliary mechanism. The injector push rod is pushed out through the elastic force of the spring, the negative pressure state is maintained, the whole device is compact in structure, a doctor can be effectively assisted in completing injector negative pressure operation with one hand, work efficiency is greatly improved, and work intensity is relieved.

Description

Technical Field

[0001] The utility model relates to a negative pressure auxiliary device for a puncture needle. Background Technology

[0002] In clinical pathological diagnosis, the collection of cytological specimens usually relies on puncture technology, among which puncture needles and negative pressure syringes are indispensable tools. The puncture process usually involves the following steps: First, under ultrasound guidance, the operator inserts the puncture needle into the target site; then, remove the needle core, connect the syringe, and generate negative pressure by pulling the push rod. Then, the operator uses negative pressure to repeat the puncture to absorb the cell sample. However, in this process, the operation of the syringe to generate negative pressure requires the cooperation of both hands: one hand fixes the syringe and the other hand pulls the push rod. Although the operator can free up one hand, he still cannot pull the push rod independently. Therefore, the assistance of a second person is often required, which not only causes a waste of human resources, but also does not improve the quality of puncture. Therefore, whether a syringe negative pressure device that can be operated with one hand can be used is a technical problem that needs to be solved urgently. Contents of utility model

[0003] The utility model solves the shortcomings of the prior art and provides a puncture needle negative pressure auxiliary device that can effectively assist doctors in the operation of aspirating cells after puncture, allowing doctors to complete the negative pressure operation of the syringe with one hand.

[0004] To achieve the above-mentioned purpose, the utility model first proposes a negative pressure auxiliary device for a puncture needle, comprising a syringe fixing housing, wherein the syringe fixing housing is provided with a syringe clamping cavity for clamping the syringe syringe and a push rod sliding cavity connected to the syringe clamping cavity, wherein a rebound auxiliary mechanism for driving the syringe push rod to move in the push rod sliding cavity is installed in the push rod sliding cavity, wherein the rebound auxiliary mechanism comprises a locking state and a rebound state, wherein in the locking state, the push rod moves along the push rod sliding cavity to the end closest to the syringe, and the position of the push rod is locked by the locking mechanism; in the rebound state, the locking mechanism unlocks the push rod, and the push rod continuously moves along the push rod sliding cavity toward the end away from the syringe under the thrust of the rebound auxiliary mechanism.

[0005] In this embodiment, the syringe clamping cavity and the push rod sliding cavity are both semi-cylindrical, the inner diameter of the syringe clamping cavity matches the outer diameter of the syringe, the bottom of the push rod sliding cavity is connected to the top of the syringe clamping cavity, a fixed plate is fixed on the side of the push rod sliding cavity near the bottom, and a gap is provided between the fixed plate and the bottom of the push rod sliding cavity to form a second clamping groove that matches the size of the syringe force plate. When the syringe is clamped in the syringe clamping cavity, the syringe force plate is clamped in the second clamping groove.

[0006] In this embodiment, the push rod sliding cavity and the syringe clamping cavity are coaxially arranged.

[0007] In this embodiment, the rebound assisting mechanism includes a sliding plate slidably installed in the push rod sliding cavity. A first clamping groove matching the size of the push plate on the push rod is provided on the sliding plate. After the syringe barrel is clamped in the syringe barrel clamping cavity, the push plate is clamped in the first clamping groove. Two parallel guide rods are fixed in the push rod sliding cavity. The guide rods are parallel to the central axis of the push rod sliding cavity. Both sides of the sliding plate are slidably sleeved on the guide rods. A spring is sleeved on the guide rods between the sliding plate and the fixed plate.

[0008] In this embodiment, the locking mechanism includes an elastic hook and a block cooperating with the elastic hook.

[0009] In this embodiment, a chute communicating with the push rod sliding cavity is provided on the syringe fixing housing. The chute is parallel to the guide rod. A slider is slidably connected in the chute. One end of the slider is fixed on the sliding plate and the other end extends out of the syringe fixing housing and an elastic hook is installed thereon. A block matching the elastic hook is fixed on the syringe fixing housing at the bottom of the push rod sliding cavity and near the end of the chute. In the locked state, the sliding plate moves to the bottom end close to the push rod sliding cavity. At this time, the elastic hook is clamped on the block to lock the position of the sliding plate. In the rebound state, press the elastic hook, the elastic hook is disengaged from the block, and the sliding plate returns to its original position under the action of the spring.

[0010] In this embodiment, a pressing hole communicating with the syringe barrel clamping cavity is also provided on the syringe fixing housing. The pressing hole facilitates ejecting the syringe barrel clamped in the syringe barrel clamping cavity.

[0011] With the above structure, the utility model has the following advantages:

[0012] 1. The device includes a rebound assisting mechanism and a locking mechanism. The rebound assisting mechanism includes a sliding plate, guide rods and a spring. By pressing down the sliding plate and overcoming the elastic force of the spring, the push rod of the syringe can smoothly enter the syringe barrel to achieve the sucking action. The locking mechanism includes an elastic hook and a block, which can lock the push rod of the syringe at the bottom of the syringe barrel to ensure the stable state of the syringe before puncture.

[0013] 2. The structure of the device is ingeniously designed. When the syringe barrel is clamped in the syringe barrel clamping cavity, the push plate of the syringe is clamped in the first clamping groove, and the force-applying plate is clamped in the second clamping groove, it is convenient to assemble the syringe and the device. And after assembly, the push rod of the syringe can still move smoothly in the syringe barrel. The usage method of the device is simple. Through steps such as clamping, pushing and locking, the preparation work before puncture can be quickly completed. After puncture, by pressing the elastic hook, it can effectively assist the doctor to complete the negative pressure operation of the syringe with one hand, thus greatly improving the efficiency of puncturing and sucking cells.

[0014] In summary, the present device utilizes the elastic force of a spring to push out the syringe plunger and maintain a negative pressure state. The entire device has a compact structure, can effectively assist a doctor in performing the negative pressure operation of the syringe with one hand, greatly improving work efficiency and reducing work intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of the front of the present utility model.

[0016] Figure 2 is a perspective view of the back of the present utility model.

[0017] Figure 3 is a schematic structural view of the syringe.

[0018] In the drawings: 1, syringe fixed housing; 11, plunger sliding cavity; 12, sliding plate; 121, first card slot; 13, guide rod; 14, spring; 15, fixed plate; 151, second card slot; 16, chute; 17, syringe barrel clamping cavity; 171, pressing hole; 172, through hole; 2, elastic hook; 3, block; 4, syringe; 41, syringe barrel; 42, force application plate; 43, plunger; 44, push plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] In addition, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0021] Such as Figures 1 to 3As shown in the figure, a puncture needle negative pressure assistance device includes a syringe fixing housing 1. A syringe is installed inside the syringe fixing housing 1. The syringe 4 includes a syringe barrel 41 and a push rod 43. A force application plate 42 is fixed on the syringe barrel 41, and a push plate 44 is fixed on the push rod 43. A syringe barrel clamping cavity 17 for clamping the syringe barrel 41 and a push rod sliding cavity 11 communicating with the syringe barrel clamping cavity 17 are provided inside the syringe fixing housing 1. A pressing hole communicating with the syringe barrel clamping cavity is also opened on the syringe fixing housing. The pressing hole facilitates ejecting the syringe barrel clamped in the syringe barrel clamping cavity. The push rod sliding cavity 11 and the syringe barrel clamping cavity 17 are coaxially arranged. A rebound assistance mechanism for driving the push rod 43 to move in the push rod sliding cavity 11 is installed inside the push rod sliding cavity 11. In this embodiment, both the syringe barrel clamping cavity 17 and the push rod sliding cavity 11 are semi-cylindrical (so as to facilitate clamping the syringe in the syringe fixing housing 1). The inner diameter of the syringe barrel clamping cavity 17 matches the outer diameter of the syringe barrel 41. The bottom of the push rod sliding cavity 11 communicates with the top of the syringe barrel clamping cavity 17. A through hole 172 for the nipple of the syringe barrel 41 to extend out is provided at the bottom of the syringe barrel clamping cavity 17. A fixing plate 15 is fixed on the inner side of the push rod sliding cavity 11, close to the bottom side. Openings not smaller than the outer diameter of the push rod 43 are provided on both the bottom of the push rod sliding cavity 11 and the fixing plate 15 (so as to allow the push rod 43 to pass through). A gap is provided between the fixing plate 15 and the bottom of the push rod sliding cavity 11 to form a second clamping groove 151.

[0022] The rebound assistance mechanism includes a sliding plate 12 slidably installed in the push rod sliding cavity 11. A first clamping groove 121 matching the size of the push plate 44 is provided on the sliding plate 12. After the syringe barrel 41 is clamped in the syringe barrel clamping cavity 17, the nipple of the syringe barrel 41 extends out from the through hole 172. The force application plate 42 of the syringe barrel 41 is clamped in the second clamping groove 151. The push plate 44 on the push rod 43 in the syringe barrel 41 is clamped in the first clamping groove 121. Two parallel guide rods 13 are fixed inside the push rod sliding cavity 11. The guide rods 13 are parallel to the central axis of the push rod sliding cavity 11. Both sides of the sliding plate 12 are slidably sleeved on the guide rods 13. A spring 14 is sleeved on the guide rods 13 between the sliding plate 12 and the fixing plate 15. One end of the spring 14 is fixed on the fixing plate 15, and the other end is fixed to the sliding plate 12. By pressing down the sliding plate 12, the sliding plate 12 overcomes the elastic force of the spring 14, and the sliding plate 12 moves downward along the guide rods 13, so as to approach the bottom of the push rod sliding cavity 11. In this way, after the syringe is clamped in this device, the action of pressing the push rod 43 into the syringe barrel 41 can be realized.

[0023] As Figure 2As shown, in this embodiment, the locking mechanism includes an elastic hook 2 and a card block 3 matched with the elastic hook 2, and the syringe fixed housing 1 is provided with two parallel slide grooves 16 connected with the push rod sliding cavity 11, and the slide groove 16 is parallel to the central axis of the push rod sliding cavity 11, and a slider is slidably connected in the slide groove 16, one end of the slider is fixed on the sliding plate 12, and the other end extends out of the syringe fixed housing 1 on which a hinge seat is installed, the elastic hook 2 includes a card matching with the card block 3, one side of the card is a card hook, and the other side is a pressing plate, the middle part of the card is hinged between the two hinge seats through a rotating shaft, and a torsion spring is mounted on the rotating shaft, one end of the torsion spring is fixed on the hinge seat, and the other end is fixed to the middle part of the card hook, and the syringe fixed housing The body 1 is fixed with a block 3 matching the elastic hook 2 at the bottom of the push rod sliding cavity 11 and the end near the slide groove 16. In the locked state, the sliding plate 12 compresses the spring, and the sliding plate 12 moves to the bottom end near the push rod sliding cavity 11. At this time, the hook of the elastic hook 2 is mounted on the bottom of the block 3, thereby locking the position of the sliding plate 12, so that the spring is used to store force for the subsequent automatic rebound of the sliding plate 12; in the rebound state, press one end of the pressing plate of the elastic hook 2, and at this time, one end of the hook is tilted around the rotating shaft, so that the hook is separated from the block 3, and at this time, the sliding plate 12 returns to its position under the action of the spring 14; when the syringe 4 is fixed in the device, the sliding plate 12 can drive the push rod 43 of the syringe 4 away from the syringe 41 to achieve the suction action.

[0024] How to use:

[0025] 1. Before puncture, first clamp the syringe 41 of the syringe 4 into the syringe clamping cavity 17, clamp the force plate 42 into the second clamping groove 151, clamp the push plate 44 into the first clamping groove 121, and then push the sliding plate 12 to the bottom, and clamp the hook of the elastic hook 2 on the bottom of the clamping block 3, so that the push rod 43 of the syringe 4 is pushed to the bottom of the syringe 41 and maintained in this state.

[0026] 2. After the puncture is completed, one hand stabilizes the puncture needle, and the other hand pulls out the inner core of the puncture needle. At the same time, the hand connects the assembled syringe to the puncture needle, and then presses the elastic hook 2. At this time, the spring drives the push rod 43 of the syringe 4 away from the syringe 41 to achieve the suction action, thereby using negative pressure to absorb cells;

[0027] 3. Finally, pull out the puncture needle with the syringe to complete the puncture.

[0028] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A puncture needle negative pressure assist device, characterized in that: The invention comprises a syringe fixing housing (1), wherein a syringe fixing housing (1) is provided with a syringe fixing cavity (17) for fixing a syringe syringe (41) and a push rod sliding cavity (11) connected to the syringe fixing cavity (17); a rebound auxiliary mechanism for driving a syringe push rod (43) to move in the push rod sliding cavity (11) is installed in the push rod sliding cavity (11); the rebound auxiliary mechanism comprises a locking state and a rebound state; in the locking state, the push rod (43) moves along the push rod sliding cavity (11) to the end closest to the syringe (41), and the position of the push rod (43) is locked by the locking mechanism; in the rebound state, the locking mechanism is released from locking the push rod (43), and the push rod (43) continuously moves along the push rod sliding cavity (11) towards the end away from the syringe (41) under the thrust of the rebound auxiliary mechanism.

2. The puncture needle negative pressure assist device according to claim 1, characterized in that: The syringe clamping cavity (17) and the push rod sliding cavity (11) are both semi-cylindrical, the inner diameter of the syringe clamping cavity (17) matches the outer diameter of the syringe (41), the bottom of the push rod sliding cavity (11) is connected to the top of the syringe clamping cavity (17), a fixing plate (15) is fixed in the push rod sliding cavity (11) on the side close to the bottom, a gap is provided between the fixing plate (15) and the bottom of the push rod sliding cavity (11) to form a second clamping groove (151) matching the size of the syringe force plate (42), when the syringe (41) is clamped in the syringe clamping cavity (17), the force plate (42) of the syringe (41) is clamped in the second clamping groove (151).

3. The puncture needle negative pressure assist device according to claim 2, characterized in that: The push rod sliding cavity (11) and the syringe clamping cavity (17) are coaxially arranged.

4. The puncture needle negative pressure assist device according to claim 2, characterized in that: The rebound auxiliary mechanism comprises a sliding plate (12) slidably mounted in a push rod sliding cavity (11); a first slot (121) matching the size of a push plate (44) on a push rod (43) is provided on the sliding plate (12); when the syringe (41) is mounted in the syringe mounting cavity (17), the push plate (44) is mounted in the first slot (121); two mutually parallel guide rods (13) are fixed in the push rod sliding cavity (11); the guide rods (13) are parallel to the central axis of the push rod sliding cavity (11); both sides of the sliding plate (12) are slidably mounted on the guide rods (13); a spring (14) is mounted on the guide rods (13) and between the sliding plate (12) and the fixed plate (15).

5. The puncture needle negative pressure assist device according to claim 4, characterized in that: The locking mechanism comprises an elastic hook (2) and a clamping block (3) cooperating with the elastic hook (2).

6. The puncture needle negative pressure assist device according to claim 5, characterized in that: The syringe fixed housing (1) is provided with a slide groove (16) connected to the push rod sliding cavity (11), the slide groove (16) is parallel to the guide rod (13), a slider is slidably connected in the slide groove (16), one end of the slider is fixed on the sliding plate (12), and the other end extends out of the syringe fixed housing (1) and an elastic hook (2) is installed on it, and a block (3) matching the elastic hook (2) is fixed on the syringe fixed housing (1) at the bottom of the push rod sliding cavity (11) and close to the end of the slide groove (16). In the locked state, the sliding plate (12) moves to the bottom end close to the push rod sliding cavity (11), at which time the elastic hook (2) is clamped on the block (3) to lock the position of the sliding plate (12). In the rebound state, the elastic hook (2) is pressed, the elastic hook (2) is separated from the block (3), and the sliding plate (12) returns to its original position under the action of the spring (14).

7. The puncture needle negative pressure assist device according to any one of claims 1 to 6, characterized in that: The syringe fixing housing (1) is also provided with a pressing hole (171) which is in communication with the syringe clamping cavity (17).

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