Skin vesicle tissue fluid suction equipment

Abstract

The utility model discloses skin vesicle tissue fluid suction equipment, which relates to the technical field of medical instruments, and comprises a needle cylinder, a needle head and a cavity, and further comprises a piston arranged in the cavity, and a connecting rod is fixedly arranged at the upper end of the piston; a second inclined groove is formed in the peripheral surface of the driven rod; the top of the driving rod is located outside the needle cylinder, a containing cavity is formed in the driving rod, and a first inclined groove is formed in the peripheral face of the driving rod; and the reverse structure is connected with the driving rod and the driven rod, and when the driving rod moves downwards, the driven rod can be driven to move upwards through the reverse structure. The driven rod can be driven to move upwards through the reverse structure, suction operation can be completed only by holding the needle cylinder with four fingers and pressing the driving rod with the thumb, the device does not need to be stabilized with the other hand, and use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a skin blister tissue fluid suction device. Background Art

[0002] Blisters refer to localized, raised, fluid-containing cavity skin lesions on the skin. They are common rash manifestations in dermatology. When necessary, the tissue fluid in the blisters needs to be sucked out to speed up the healing of the blisters and reduce the risk of infection.

[0003] A skin blister tissue fluid aspirator is proposed in a Chinese patent publication number CN220558339U, comprising a needle tube and a push rod, wherein the push rod is movably mounted inside the needle tube, a piston is fixedly connected to the upper end of the push rod, a handle is fixedly connected to the lower end of the push rod, a needle is fixedly mounted on the upper end of the needle tube, a buckle device is provided at the upper left side of the outer wall of the needle tube, a disinfectant box is provided inside the buckle device, a fixed block is fixedly mounted at the upper right side of the outer wall of the needle tube, and a limiting device is fixedly mounted on the upper end of the fixed block. The aspirator can adjust the length of the needle to facilitate the needle to penetrate into blisters of different sizes to absorb tissue fluid, and can also squeeze out disinfectant to disinfect the blister surface before and after absorbing tissue fluid through an additional disinfection box.

[0004] However, when using the skin blister tissue fluid aspirator, one hand is required to fix the device and the other hand is required to move the push rod, which requires two hands to operate simultaneously. Other actions cannot be completed during the aspiration process, and some unexpected situations cannot be handled, which is very inconvenient. Utility Model Content

[0005] The utility model provides a skin blister tissue fluid suction device, which has the advantage of being able to complete the suction of tissue fluid in the blister with one hand, so as to solve the problems raised in the background technology.

[0006] In order to achieve the purpose of being able to suck out tissue fluid in blisters with one hand, the utility model provides the following technical solutions: a skin blister tissue fluid suction device, comprising a syringe, a needle and a cavity, the needle being fixedly connected to the lower end of the syringe, the cavity being opened in the interior of the syringe, and also comprising a piston being arranged at the lower end of the cavity, a connecting rod being fixedly arranged at the upper end of the piston; a driven rod, the driven rod being fixedly arranged at the upper end of the connecting rod, and a second oblique groove being arranged on the outer circumferential surface of the driven rod; an active rod, the active rod being arranged at the upper end of the driven rod, and the top of the active rod being located outside the syringe, a receiving cavity being arranged in the active rod, the driven rod being able to move up and down in the receiving cavity, a first oblique groove being arranged on the outer circumferential surface of the active rod, and the first oblique groove penetrating into the receiving cavity; a reverse structure, the reverse structure being connected to the first oblique groove and the second oblique groove, and when the active rod moves downward, the driven rod can be driven to move upward through the reverse structure.

[0007] As a preferred technical solution of the utility model, the first inclined groove and the second inclined groove have opposite rotation directions, and the lower end of the first inclined groove overlaps with the upper end of the second inclined groove.

[0008] As a preferred technical solution of the utility model, the reverse structure includes a rotating ring, which is sleeved on the outer circumference of the active rod, and a cylindrical protrusion is fixed on the inner circumference of the rotating ring, and the cylindrical protrusion can be inserted into the overlapping part of the first inclined groove and the second inclined groove.

[0009] As a preferred technical solution of the utility model, a step portion is provided at the upper end of the cavity, the diameter of the step portion is larger than the diameter of the cavity, an annular groove is opened at the upper end of the step portion, the annular groove fits with the rotating ring, and the rotating ring can rotate in the annular groove.

[0010] As a preferred technical solution of the utility model, it also includes a guide structure, which can enable the active rod and the driven rod to move along the axial direction of the syringe; the guide structure includes a first vertical groove opened on the outer peripheral surface of the active rod and a second vertical groove opened on the outer peripheral surface of the driven rod, the first vertical groove penetrates into the accommodating cavity, and the first vertical groove and the second vertical groove are connected in the vertical direction to form a passage, and a guide block is fixedly provided on the surface of the step portion corresponding to the first vertical groove, and the guide block can move up and down in the passage.

[0011] As a preferred technical solution of the utility model, a spring is arranged in the stepped portion, and the spring is sleeved on the outer peripheral surface of the driven rod.

[0012] As a preferred technical solution of the utility model, a soft pad is fixedly provided on the top of the active rod, and the soft pad can increase the friction with the user's hand.

[0013] Compared with the prior art, the utility model provides a skin blister tissue fluid suction device, which has the following beneficial effects:

[0014] 1. The skin blister tissue fluid suction device is provided with an active rod and a driven rod connected to the reverse structure together, so that when the active rod moves downward, the driven rod can be driven to move upward through the reverse structure, thereby changing the toggle structure into a push structure. The suction operation can be completed by only holding the syringe with four fingers and pressing the active rod with the thumb, and there is no need to use the other hand to stabilize the device, which is more convenient to use.

[0015] 2. The skin blister tissue fluid suction device has a spring arranged in the syringe. After the tissue fluid is sucked out, the tissue fluid in the cavity can be discharged through the resetting action of the spring, and there is no need to manually discharge the tissue fluid.

[0016] 3. The skin blister tissue fluid aspiration device can increase the friction with the user's hand by arranging a soft pad on the upper end of the active rod, thereby preventing the fingers from slipping from the top of the active rod during use, causing the needle to stab the patient, and improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a cross-sectional view of the syringe of the utility model;

[0019] Figure 3 This is the internal structure diagram of the syringe of the utility model;

[0020] Figure 4 This is a structural diagram of the active rod and the driven rod of the utility model;

[0021] Figure 5 This is the vertical groove matching diagram of the utility model;

[0022] Figure 6 This is a structural diagram of the rotating ring of the utility model.

[0023] In the figure: 1, syringe; 2, needle; 3, annular groove; 4, active rod; 41, first oblique groove; 42, first vertical groove; 43, accommodating chamber; 5, driven rod; 51, second oblique groove; 52, second vertical groove; 6, connecting rod; 7, piston; 8, spring; 9, rotating ring; 91, cylindrical protrusion; 10, guide block; 11, cavity; 12, stepped portion; 13, cushion. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 - Figure 4 The utility model discloses a skin blister tissue fluid suction device, comprising a syringe 1, a needle 2 for puncturing blisters and a cavity 11 for storing tissue fluid, the needle 2 is fixedly connected to the lower end of the syringe 1, the cavity 11 is opened inside the syringe 1, a piston 7 is arranged at the lower end of the cavity 11, the piston 7 is preferably made of rubber material, and the piston 7 is in sealing contact with the cavity 11, a connecting rod 6 is fixedly arranged at the upper end of the piston 7, the diameter of the connecting rod 6 is smaller than the diameter of the cavity 11, so as to avoid the outer peripheral surface of the connecting rod 6 from contacting the cavity 11.

[0026] A driven rod 5 is fixedly provided at the upper end of the connecting rod 6, and a second inclined groove 51 is provided on the outer circumferential surface of the driven rod 5; an active rod 4 is fixedly provided at the upper end of the driven rod 5, and the top of the active rod 4 is located outside the syringe 1, so that the active rod 4 has enough stroke to move into the syringe 1, and a accommodating chamber 43 is also provided in the active rod 4, so that the driven rod 5 can move up and down in the accommodating chamber 43; a first inclined groove 41 is provided on the outer circumferential surface of the active rod 4, and the first inclined groove 41 penetrates into the accommodating chamber 43; the active rod 4 and the driven rod 5 are connected to the reverse structure together; when the active rod 4 moves downward, the driven rod 5 can be driven to move upward through the reverse structure, thereby changing the toggle structure into a push structure; the aspiration operation can be completed by holding the syringe 1 with four fingers and pressing the active rod 4 with the thumb, and there is no need to use the other hand to stabilize the device, which is more convenient to use.

[0027] In this embodiment, the rotation directions of the first bevel groove 41 and the second bevel groove 51 are opposite. In essence, the first bevel groove 41 and the second bevel groove 51 have the same structure and size, and the lower end of the first bevel groove 41 overlaps with the upper end of the second bevel groove 51 to form a through-hole structure in the radial direction.

[0028] Combination Figure 2 - Figure 4 The reverse structure includes a rotating ring 9, which is sleeved on the outer circumference of the active rod 4. A cylindrical protrusion 91 is fixed on the inner circumference of the rotating ring 9. The cylindrical protrusion 91 can be inserted into the overlapping part of the first inclined groove 41 and the second inclined groove 51. The cylindrical protrusion 91 can also limit the active rod 4 to prevent the active rod 4 from escaping from the syringe 1; a step portion 12 is provided at the upper end of the cavity 11, and the diameter of the step portion 12 is preferably larger than the diameter of the cavity 11. An annular groove 3 is opened at the upper end of the step portion 12, and the annular groove 3 fits with the rotating ring 9, and the rotating ring 9 can rotate in the annular groove 3.

[0029] In this embodiment, when the active rod 4 is pressed downward, the first inclined groove 41 will push the cylindrical protrusion 91, causing the cylindrical protrusion 91 to move from the lower end of the first inclined groove 41 to the upper end thereof along the first inclined groove 41. Since the cylindrical protrusion 91 is fixedly connected to the rotatable rotating ring 9, the cylindrical protrusion 91 will push the second inclined groove 51 and move from the upper end of the second inclined groove 51 to the lower end thereof along the second inclined groove 51, thereby causing the driven rod 5 to rotate and move upward, thereby driving the piston 7 to move upward.

[0030] Combination Figure 3 , Figure 5In order to eliminate the rotation of the active rod 4 and the driven rod 5, a guide structure is also provided, which can enable the active rod 4 and the driven rod 5 to move along the axial direction of the syringe 1; the guide structure includes a first vertical groove 42 opened on the outer peripheral surface of the active rod 4 and a second vertical groove 52 opened on the outer peripheral surface of the driven rod 5, the first vertical groove 42 penetrates into the accommodating cavity 43, and the first vertical groove 42 and the second vertical groove 52 form a passage in the vertical direction, and the first vertical groove 42 and the second vertical groove 52 have the same width, and the first vertical groove 42 and the second vertical groove 52 have opposite sides that are both open ends; a guide block 10 is fixedly provided on the surface of the step portion 12 corresponding to the first vertical groove 42, and the guide block 10 can move up and down in the passage formed by the combination of the first vertical groove 42 and the second vertical groove 52, and the two ends of the guide block 10 are preferably arc surfaces to reduce friction with the first vertical groove 42 and the second vertical groove 52.

[0031] In this embodiment, when the active rod 4 moves downward, the guide block 10 cooperates with the first vertical groove 42 to limit the circumferential movement of the active rod 4, and the guide block 10 also cooperates with the second vertical groove 52 to limit the circumferential movement of the driven rod 5.

[0032] Combination Figure 2 In order to enable the active rod 4 and the driven rod 5 to reset after moving, a spring 8 is provided in the step portion 12. The spring 8 is sleeved on the outer circumferential surface of the driven rod 5, and the lower end of the spring 8 is fixed to the step of the step portion 12. The spring 8 is in a compressed state when the active rod 4 is pressed downward. After the active rod 4 is released, the spring 8 can reset the active rod 4.

[0033] Combination Figure 1 , Figure 2 A cushion 13 is fixedly provided on the top of the active rod 4. The material of the cushion 13 can be silicone or rubber. The cushion 13 can increase friction to prevent the finger from slipping from the top of the active rod 4 during use, thereby causing the needle 2 to injure the patient, thereby improving safety in use.

[0034] The working principle and use process of the utility model are as follows: when in use, four fingers hold the syringe 1 and put the thumb on the cushion 13, then aim the needle 2 at the blister and pierce it, and the thumb is pressed downward to make the active rod 4 move vertically downward under the limit of the guide block 10 and compress the spring 8. At this time, the first inclined groove 41 will push the cylindrical protrusion 91 and make the rotating ring 9 rotate, so that the cylindrical protrusion 91 moves from the lower end of the first inclined groove 41 to the upper end thereof along the first inclined groove 41, and at the same time, the cylindrical protrusion 91 will push the first inclined groove 41 to move the first inclined groove 41 to the upper end thereof. The second inclined groove 51 is connected to the second inclined groove 51, and moves along the upper end of the second inclined groove 51 toward the lower end thereof, thereby driving the driven rod 5 to move vertically upward under the limit of the guide block 10, and then driving the piston 7 to move upward through the connecting rod 6 to extract the tissue fluid in the blister into the cavity 11. After the extraction is completed, the needle 2 is pulled out, and the thumb releases the active rod 4. The active rod 4 can be reset under the action of the spring 8, and drive the driven rod 5 and the piston 7 to move downward, thereby discharging the tissue fluid in the cavity 11.

[0035] In summary, the skin blister tissue fluid suction device, by providing an active rod 4 and a driven rod 5 connected together with the reverse structure, when the active rod 4 moves downward, the driven rod 5 can be driven to move upward through the reverse structure, thereby changing the toggle structure into a push structure, and the suction operation can be completed by holding the syringe 1 with four fingers and pressing the active rod 4 with the thumb, without the need to use the other hand to stabilize the device, which is more convenient to use; by providing a spring 8 in the syringe 1, the tissue fluid in the cavity 11 can be discharged through the reset action of the spring 8 after the tissue fluid is sucked out, and there is no need to manually discharge the tissue fluid; by providing a soft pad 13 at the upper end of the active rod 4, the friction with the user's hand can be increased to avoid the finger slipping from the top of the active rod 4 during use, causing the needle 2 to injure the patient, thereby improving the safety of use.

[0036] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A skin blister tissue fluid aspiration device, comprising a syringe (1), a needle (2) and a cavity (11), wherein the needle (2) is fixedly connected to the lower end of the syringe (1), and the cavity (11) is opened inside the syringe (1), characterized in that: Also includes: A piston (7) is provided at the lower end of the cavity (11), and a connecting rod (6) is fixedly provided at the upper end of the piston (7); A driven rod (5), the driven rod (5) being fixedly mounted on the upper end of the connecting rod (6), and a second inclined groove (51) being formed on the outer peripheral surface of the driven rod (5); An active rod (4), the active rod (4) being arranged at the upper end of the driven rod (5), and the top of the active rod (4) being located outside the syringe (1), a receiving chamber (43) being provided in the active rod (4), the driven rod (5) being able to move up and down in the receiving chamber (43), a first inclined groove (41) being provided on the outer peripheral surface of the active rod (4), and the first inclined groove (41) penetrating into the receiving chamber (43); A reverse structure is connected to the first inclined groove (41) and the second inclined groove (51), and when the active rod (4) moves downward, the driven rod (5) can be driven to move upward through the reverse structure.

2. A skin blister tissue fluid aspiration device according to claim 1, characterized in that: The first inclined groove (41) and the second inclined groove (51) have opposite rotation directions, and the lower end of the first inclined groove (41) overlaps with the upper end of the second inclined groove (51).

3. A skin blister tissue fluid aspiration device according to claim 1, characterized in that: The reverse structure comprises a rotating ring (9), the rotating ring (9) being sleeved on the outer circumference of the active rod (4), the inner circumference of the rotating ring (9) being fixedly provided with a cylindrical protrusion (91), and the cylindrical protrusion (91) being capable of being inserted into the overlapping portion of the first inclined groove (41) and the second inclined groove (51).

4. A skin blister tissue fluid aspiration device according to claim 3, characterized in that: The upper end of the cavity (11) is provided with a stepped portion (12), the diameter of the stepped portion (12) is larger than the diameter of the cavity (11), the upper end of the stepped portion (12) is provided with an annular groove (3), the annular groove (3) is fitted with the rotating ring (9), and the rotating ring (9) can rotate in the annular groove (3).

5. A skin blister tissue fluid aspiration device according to claim 4, characterized in that: It also includes a guide structure, wherein the guide structure enables the active rod (4) and the driven rod (5) to move along the axial direction of the syringe (1); The guide structure comprises a first vertical groove (42) formed on the outer circumference of the active rod (4) and a second vertical groove (52) formed on the outer circumference of the driven rod (5); the first vertical groove (42) penetrates into the accommodating cavity (43), and the first vertical groove (42) and the second vertical groove (52) are connected in the vertical direction to form a passage; a guide block (10) is fixedly provided on the surface of the step portion (12) corresponding to the first vertical groove (42); and the guide block (10) can move up and down in the passage.

6. The skin blister tissue fluid aspiration device according to claim 4, characterized in that: A spring (8) is arranged inside the stepped portion (12), and the spring (8) is sleeved on the outer peripheral surface of the driven rod (5).

7. The skin blister tissue fluid aspiration device according to claim 1, characterized in that: A soft pad (13) is fixedly provided on the top of the active rod (4), and the soft pad (13) can increase the friction force with the user's hand.

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