Pressing handle screwed with Luer taper

Abstract

The utility model relates to the technical field of Luer tapers, in particular to a pressing handle for screwing Luer tapers, which comprises a shell, a guide shaft, a core rod and a clamp, the shell and the guide shaft are both of hollow structures, the guide shaft is fixed inside the shell, two sections of tracks communicated with each other are arranged on the shaft wall of the guide shaft, and the core rod is fixed on the guide shaft. The tracks at the two ends are spiral and are in mirror symmetry about the symmetry axis of the axis of the guide shaft; the core rod is arranged on the inner side of the guide shaft, a guide rod capable of moving in the track is arranged on the outer side of the core rod, and the guide rod is located in the middle of the core rod; the two ends of the core rod penetrate out of the shell and are detachably connected with the clamps, and the clamps are used for being connected with the Luer tapers. The Luer taper and the core rod are fixed, the core rod is driven to rotate in a pressing mode, then the Luer taper is screwed or unscrewed, the operation that the Luer taper is pinched by fingers is omitted, and the labor injury of personnel is avoided; axial displacement generated by pressing the shell is converted into axial displacement of the core rod and circumferential rotation of the clamp at the same time, circle-by-circle rotation is not needed, and the screwing or unscrewing step can be completed only through one action.

Description

Technical Field

[0001] The utility model relates to the technical field of Luer connectors, in particular to a pressing handle for screwing a Luer connector. Background Art

[0002] The Luer connector is a commonly used liquid connection method. It achieves leak-proof connection through the unique design of internal and external threads and is widely used in fields such as biopharmaceuticals. In the prior art, the connection between male and female Luer connectors needs to be tightened manually. However, the Luer connector is small in size and needs to be pinched firmly with the fingers to be grasped. Moreover, due to its small size and ridged outer periphery, it has a significant pressure on the fingers. When the number of tightenings exceeds a certain number, it will cause obvious pain to the operator's fingers, which not only poses a risk of work-related injuries but also reduces efficiency. In addition, the number of threads of the Luer connector is more than one. Even if the efficiency reduction caused by human discomfort is not taken into account, it itself requires multiple rotation operations to be completely screwed on.

[0003] If you want to design a special electric device for it, you need to consider the following issues:

[0004] 1. Electric equipment contains motors, which are usually lubricated with oil to prevent rust. This makes them unsuitable for clean workshops to avoid contamination of products.

[0005] 2. Electric equipment has heat dissipation requirements, and its internal layout cannot be completely compact, which will result in a large volume. Moreover, due to the presence of charging cables, it is difficult to carry and is not conducive to operation in a small space.

[0006] 3. Since the material of the Luer connector is fragile and cannot withstand large torque, the number of revolutions of the motor and the torque must be precisely controlled.

[0007] Therefore, if you want to solve the above problems and customize a dedicated electric device, the complexity and cost will be greatly increased. Utility Model Content

[0008] The utility model aims to provide a pressing handle for screwing a Luer connector, so as to solve the problems of low connection efficiency and easy labor injury caused by operation of the Luer connector.

[0009] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a pressing handle for a screw-on Luer connector, comprising a shell, a guide shaft, a core rod, and a clamp, wherein the shell and the guide shaft are both hollow structures, the guide shaft is fixed to the interior of the shell, and the shaft wall of the guide shaft is provided with two sections of mutually connected tracks, the tracks at both ends are spiral and mirror-symmetrical about the axis of symmetry of the guide shaft axis; the core rod is arranged on the inner side of the guide shaft, and a guide rod movable within the track is provided on the outer side of the core rod, and the guide rod is located in the middle of the core rod; both ends of the core rod pass through the shell and are detachably connected to the clamp, and the clamp is used to connect the Luer connector.

[0010] Preferably, both ends of the shell are threadedly connected with end covers, and a hole is opened in the middle of the end cover for the core rod to pass through; the core rod is provided with two bearings located on the inner side of the guide shaft, and the bearings are arranged on both sides of the guide rod; the core rod is also provided with two springs, and the two ends of each spring are respectively abutted against one of the bearings and one of the end covers.

[0011] Preferably, a spring receiving groove is provided in the middle portion of the inner side of the end cover, and the corresponding end portion of the spring is confined in the spring receiving groove.

[0012] Preferably, the core rod includes a middle section and spring sleeve sections on both sides of the middle section, the diameter of the spring sleeve section is smaller than the diameter of the middle section, and the spring and the bearing are both sleeved on the spring sleeve section; the guide rod is provided in the middle of the middle section, and the guide rod extends radially outward.

[0013] Preferably, the bearing is a thrust bearing, which is sleeved on the end of the spring sleeve section close to the middle section, and two sides of the bearing are in contact with the spring and the middle section respectively.

[0014] Preferably, the bearing is a radial bearing, a table is formed at the intersection of the middle section and the spring sleeve section, the inner ring of the radial bearing abuts the table, and the spring abuts the outer ring of the radial bearing.

[0015] Preferably, the clamp is a Luer connector contoured chuck having a contoured cavity and a chuck sleeve connected to the contoured cavity; the chuck sleeve is sleeved on the end of the core rod, and a ball screw is used to connect the core rod and the chuck sleeve.

[0016] Preferably, the end of the core rod has a rotation-stopping plane, and the internal shape of the chuck sleeve matches the shape of the end of the core rod to prevent relative circumferential displacement between the Luer connector contoured chuck and the core rod.

[0017] Preferably, the clamp is a thick silicone pad, which has friction, and the Luer connector can be sunk into the thick silicone pad, so that the thick silicone pad and the Luer connector are relatively fixed.

[0018] Preferably, the two sections of the track are a forward track and a reverse track respectively, the forward track and the reverse track are connected by a stop tangential track, and the guide rod is passed through the forward track, the reverse track and the stop tangential track; when the pressing handle is placed upright, the forward track is located above the stop tangential track, and the forward track spirals upward clockwise from the stop tangential track.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The utility model fixes the Luer connector and the core rod, and uses a pressing method to drive the core rod to rotate, thereby tightening or loosening the Luer connector, eliminating the operation of pinching the connector with fingers and avoiding labor injuries.

[0021] 2. The utility model converts the axial displacement generated by pressing the shell into the axial displacement of the core rod and the circumferential rotation of the clamp. There is no need to rotate circle by circle, and only one action is needed to complete the tightening or loosening step.

[0022] 3. The present invention adopts a mirror-symmetrical spiral track design. When the Luer connector is connected to the clamps at both ends, pressing can produce opposite circumferential movements, thereby realizing both screwing on and tightening the Luer connector and loosening and unscrewing the Luer connector.

[0023] 4. The utility model connects the shell to the two ends of the core rod through springs, which can not only realize the automatic reset function of the core rod, but also increase the damping feeling when pressing the shell, thereby improving the user experience of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of each component in the embodiment of the utility model;

[0026] Figure 3 It is a cross-sectional view of the present utility model;

[0027] Figure 4 This is a schematic diagram of the cooperation between the Luer connector chuck and the mandrel in an embodiment of the present invention;

[0028] Figure 5 It is a front view of the guide shaft when the embodiment of the utility model is placed upright. DETAILED DESCRIPTION

[0029] See also Figures 1 to 3 The embodiment of the utility model discloses a pressing handle for a screw-on Luer connector, comprising a housing 1, a guide shaft 2, a core rod 3 and a clamp.

[0030] Both the outer shell 1 and the guide shaft 2 have an internal hollow structure. A screw hole 81 is provided at the end of the guide shaft 2. A fixing screw 71 is passed through the screw hole 81 on the outer shell 1 and connected to the screw hole 81 of the guide shaft 2 to fix the guide shaft 2 inside the outer shell 1. The guide shaft 2 and the outer shell 1 form a whole that will not move relative to each other.

[0031] The wall of the guide shaft 2 is provided with a forward track 21, a reverse track 23, and a stop tangential track 22. The forward track 21, the reverse track 23, and the stop tangential track 22 are connected in series, and the forward track 21 and the reverse track 23 are connected by the stop tangential track 22. The forward track 21 and the reverse track 23 are both spiral-shaped and have a mirror-symmetric relationship about the axis of the guide shaft 2.

[0032] The forward track 21 , reverse track 23 and stop tangential track 22 connected to each other form a set of guide tracks. Another set of guide tracks is opened on the shaft wall of the guide shaft 2 , and the two sets of guide tracks are mirror-symmetrical about the axis of the guide shaft 2 .

[0033] Mandrel 3 is positioned inside guide shaft 2, forming a mirror-symmetrical structure. Mandrel 3 is longer than both guide shaft 2 and housing 1. End caps 11 are threadedly connected to each end of housing 1. End caps 11 have internal threads, while housing 1 has external threads, forming a mating connection. A hole 12 is defined in the center of end caps 11 for mandrel 3 to pass through. Both ends of mandrel 3 extend through hole 12.

[0034] The mandrel 3 comprises a central section 31 and spring-mounted sections 32 on either side of the central section 31. The diameter of the spring-mounted sections 32 is smaller than that of the central section 31. Two co-linear guide rods 34 are positioned in the center of the central section 31. Both guide rods 34 extend radially outward and are respectively threaded through a set of guide rails. The mandrel 3 is sheathed with two springs 5, one located in each of the spring-mounted sections 32.

[0035] A table 33 is formed at the intersection of the middle section 31 and the spring sleeve section 32. The diameter of the table 33 is between that of the middle section 31 and the spring sleeve tongue section 32. A deep groove ball bearing 6, a type of radial bearing, is mounted on the end of the spring sleeve section 32 near the table 33. The deep groove ball bearing 6 is located inside the guide shaft 2. The inner ring of the deep groove ball bearing 6 abuts the table 33, while the outer ring does not contact any part of the mandrel 3.

[0036] A spring receiving groove 13 is further provided in the middle of the inner side of the end cover 11 . One end of the spring 5 abuts against the outer ring of the deep groove ball bearing 6 , and the other end abuts against the end cover 11 and is confined in the spring receiving groove 13 .

[0037] The mandrel 3 is connected to the housing 1 via springs 5 at both ends. When no external force is applied, the guide rod 34 is in the stop tangential track 22. Pressing the housing 1 against one end of the mandrel 3 causes the mandrel 3 to move axially relative to the housing 1. Simultaneously, the guide rod 34 moves from the stop tangential track 22 to the forward track 21 or the reverse track 23, rotating along the track and driving the mandrel 3 in circumferential rotation.

[0038] The spring 5 is provided to ensure that the mandrel 3 automatically returns to its original position and to provide a slight damping effect when pressing downward, enhancing the tool's user experience. Furthermore, the outer ring of the deep groove ball bearing 6 contacts only the spring 5, preventing the mandrel 3 from rotating while simultaneously driving the spring 5. A thrust bearing can also be used in place of the deep groove ball bearing 6. However, using a thrust bearing eliminates the need for table 33, allowing the two sides of the thrust bearing to directly contact the spring 5 and the middle section 31, respectively, thus preventing the spring 5 from rotating with the mandrel 3.

[0039] Combine Figure 1 、 Figure 3 and Figure 4 Mandrel 3 is detachably connected to a fixture on the exterior of housing 1 for connection to a Luer connector. In this embodiment, the fixture is a Luer connector contoured chuck 4 having a contoured cavity 41 and a chuck sleeve 42 connected thereto. The end of mandrel 3 has a rotation-stopping flat surface 35. The internal shape of chuck sleeve 42 matches the shape of the end of mandrel 3, allowing chuck sleeve 42 to fit over the end of mandrel 3.

[0040] Both the anti-rotation surface 35 and the collet sleeve 42 are provided with fixing holes 82, through which a screw 72 is inserted to connect the mandrel 3 and the collet sleeve 42. The anti-rotation surface 35 also prevents circumferential displacement of the Luer connector chuck 4 and the mandrel 3. Since the end of the mandrel 3 is not fixedly connected to the Luer connector chuck 4, different chuck sizes can be interchanged, providing greater practicality and adaptability.

[0041] In other embodiments, the Luer connector contoured chuck 4 can be replaced with a thick pad made of a soft material such as silicone. The thick silicone pad has friction, and when pressed, the Luer connector can easily sink into the thick silicone pad, thereby making the thick silicone pad and the Luer connector relatively fixedly connected, and the core rod 3 can drive the Luer connector to rotate.

[0042] See Figure 1 The outer surface of the end cap 11 is marked with the words "Forward" or "Reverse". "Forward" is marked on the end cap 11 on the side where the forward track 21 is located, and "Reverse" is marked on the end cap 11 on the side where the reverse track 23 is located. Note that in both cases where the "Forward" mark is on the top and the "Reverse" mark is on the top, the entire pressing handle is reversed.

[0043] The definition of this utility model is that when the handle is placed forward, the "forward" mark faces upward. Figure 5 The forward track 21 is located above the stop tangential track 22. When viewing the trajectory of each track from above, the forward track 21 spirals upward clockwise from the stop tangential track 22. After the swap, the "reverse" mark faces upward, and the reverse track 23 is located above the stop tangential track 22. When viewing the trajectory of each track from above, the reverse track 23 spirals upward counterclockwise from the stop tangential track 22.

[0044] To tighten the Luer connector, first identify the markings on the end cap 11, aligning the "forward" marking with the handle. Then, place the female Luer connector on the Luer connector chuck 4 at the other end, aligning it with the male Luer connector. Then, hold the housing 1 and press downward. The guide rod 34 will leave the stop tangential track 22, move upward, and enter the forward track 21. Due to the track's limiting action, the guide rod 34 will drive the mandrel 3 in forward rotation, thereby driving the female Luer connector in forward rotation, thereby tightening the connector. Once tightened, stop pressing and quickly remove the handle. The Luer connector chuck 4 is only temporarily fixed and can be disconnected directly. The female Luer connector remains attached to the male Luer connector, completing the connection.

[0045] To loosen the Luer connector, first identify the marking on the end cap 11, align the "reverse" marking upward, and then place the Luer female connector onto the Luer connector shaped chuck 4 at the other end. Then, hold the housing 1 and press downward; the guide rod 34 will leave the stop tangential track 22, move upward, and enter the reversal track 23. Due to the limiting effect of the track, the guide rod 34 will drive the core rod 3 to rotate in the opposite direction, thereby reversing the Luer female connector and loosening it.

[0046] In summary, the present invention fixes the Luer connector to the core rod 3, and uses a pressing method to drive the core rod 3 to rotate, thereby tightening or loosening the Luer connector, eliminating the operation of pinching the connector with fingers and avoiding labor injuries to personnel; at the same time, the axial displacement generated by pressing the shell 1 is converted into the axial displacement of the core rod 3 and the circumferential rotation of the clamp, without the need for rotation circle by circle, and only one action is required to complete the tightening or loosening step; the present invention uses a mirror-symmetrical spiral track design, and when the Luer connector is connected to the clamps at both ends, pressing can produce opposite circumferential movements, thereby realizing both the screwing and tightening of the Luer connector and the loosening and unscrewing of the Luer connector.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A push handle for a screw-on Luer connector, characterized in that: The invention comprises a shell (1), a guide shaft (2), a core rod (3) and a clamp, wherein the shell (1) and the guide shaft (2) are both hollow structures, the guide shaft (2) is fixed inside the shell (1), and the shaft wall of the guide shaft (2) is provided with two sections of tracks that are interconnected, the tracks at both ends are spiral-shaped and are mirror-symmetrical about the axis of symmetry of the guide shaft (2); the core rod (3) is arranged on the inner side of the guide shaft (2), and a guide rod (34) that can move within the track is arranged on the outer side of the core rod (3), and the guide rod (34) is located in the middle of the core rod (3); the two ends of the core rod (3) pass through the shell (1) and are detachably connected to the clamp, and the clamp is used to connect the Luer connector.

2. The pressing handle according to claim 1, wherein: The two ends of the housing (1) are threadedly connected to end covers (11), and a hole (12) is provided in the middle of the end cover (11) for the core rod (3) to pass through; the core rod (3) is provided with two bearings located on the inner side of the guide shaft (2), and the bearings are arranged on both sides of the guide rod (34); the core rod (3) is also provided with two springs (5), and the two ends of each spring (5) are respectively in contact with one of the bearings and one of the end covers (11).

3. The pressing handle according to claim 2, wherein: A spring receiving groove (13) is provided in the middle of the inner side of the end cover (11), and the corresponding end of the spring (5) is confined in the spring receiving groove (13).

4. The pressing handle according to claim 2, wherein: The core rod (3) comprises a middle section (31) and spring sleeve sections (32) on both sides of the middle section (31); the diameter of the spring sleeve section (32) is smaller than the diameter of the middle section (31); the spring (5) and the bearing are both sleeved on the spring sleeve section (32); the guide rod (34) is provided in the middle of the middle section (31), and the guide rod (34) extends outward in the radial direction.

5. The pressing handle according to claim 4, characterized in that: The bearing is a thrust bearing, which is sleeved on the end of the spring sleeve section (32) close to the middle section (31), and both sides of the bearing are in contact with the spring (5) and the middle section (31) respectively.

6. The pressing handle according to claim 4, wherein: The bearing is a radial bearing, and a table surface (33) is formed at the intersection of the middle section (31) and the spring sleeve section (32). The inner ring of the radial bearing abuts against the table surface (33), and the spring (5) abuts against the outer ring of the radial bearing.

7. The pressing handle according to claim 1, wherein: The clamp is a Luer connector shaped chuck (4), which has a shaped cavity (41) and a chuck sleeve (42) connected to the shaped cavity (41). The chuck sleeve (42) is sleeved on the end of the core rod (3), and a ball screw (72) is used to connect the core rod (3) and the chuck sleeve (42).

8. The pressing handle according to claim 7, wherein: The end of the core rod (3) has a rotation-stopping plane (35), and the internal shape of the chuck sleeve (42) matches the end shape of the core rod (3) to prevent the Luer connector contoured chuck (4) and the core rod (3) from having relative circumferential displacement.

9. The pressing handle according to claim 1, wherein: The clamp is a thick silicone pad, which has friction. The Luer connector can be sunk into the thick silicone pad, so that the thick silicone pad and the Luer connector are relatively fixed.

10. The pressing handle according to claim 1, wherein: The two sections of the track are respectively a forward track (21) and a reverse track (23); the forward track (21) and the reverse track (23) are connected through a stop tangential track (22); the guide rod (34) is arranged through the forward track (21), the reverse track (23) and the stop tangential track (22); when the pressing handle is placed upright, the forward track (21) is located above the stop tangential track (22), and the forward track (21) spirals upward clockwise from the stop tangential track (22).

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