Syringe piston push rod clamping mechanism

Abstract

The utility model discloses an injector piston push rod clamping mechanism, which relates to the field of medical instruments and comprises a bottom plate, a baffle plate, a clamping plate, a double-thread screw, a sliding block and a guide rod, the baffle plate is upwards arranged on the bottom plate, clamping plates which are opposite left and right are arranged in front of the baffle plate, an inner notch for an injector push rod to penetrate through is formed in the inner side of each clamping plate, and a gap for placing an injector push rod tail plate is reserved between each clamping plate and the baffle plate; the double-thread screw is rotationally arranged relative to the bottom plate, the double-thread screw is driven by a micro motor, and the two ends of the double-thread screw are in threaded fit with the sliding blocks respectively; the guide rod is arranged on the bottom plate in parallel relative to the screw rod, and the sliding block is in sliding fit with the guide rod; the two clamping plates are fixed to the two sliding blocks respectively. The push rod of the injector can be locked through the two clamping plates with the notches, the tail plate of the push rod is blocked through the baffle, multi-angle locking of the push rod can be achieved, and the push rod is prevented from loosening.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a syringe piston rod clamping mechanism. Background Technology

[0002] Cytotoxic drug preparation can cause toxicity to the reproductive, urinary, hepatic, and renal systems through skin contact or inhalation, and can also have teratogenic effects. Long-term exposure to cytotoxic waste can easily lead to occupational injuries for nursing staff. Therefore, the current trend is to use automated solution preparation equipment to assist or replace medical staff in preparing solutions.

[0003] Currently, common automated drug dispensing equipment, such as the fully functional intelligent robot for liquid drug preparation and its dispensing method disclosed in patent document CN102151228B, uses a syringe push-pull clamping mechanism as a crucial component, which is essential for the automated preparation of such drugs. Current related solutions, such as the syringe gripper disclosed in patent document CN217311165U, use an upper clamping plate to fix the plunger. This upper clamping plate uses integrated upper and lower clamping plates to fix the plunger tail plate. This fixing method has significant drawbacks in automated dispensing processes because the fixing force remains constant, resulting in unstable clamping. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a syringe piston rod clamping mechanism. The syringe rod can be locked by two clamping plates with notches, and the tail plate of the rod can be blocked by a baffle, which can achieve multi-angle locking of the rod, prevent the rod from loosening, and drive the rod to move more effectively.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a syringe piston rod clamping mechanism, including a base plate, a baffle, a clamping plate, a double-ended screw, a slider and a guide rod;

[0006] The base plate is provided with the baffle facing upwards, and the baffle is provided with left and right opposing clamps in front of it. The inner side of the clamps is provided with an inner notch for the syringe plunger to pass through. A gap is left between the clamps and the baffle to place the syringe plunger tail plate.

[0007] The double-ended screw is rotatably mounted relative to the base plate. The double-ended screw is driven by a micro motor, and the slider is threaded onto both ends of the double-ended screw.

[0008] The guide rod is arranged side by side with the double-ended screw on the base plate, and the slider is slidably engaged with the guide rod;

[0009] The two clamps are respectively fixed to the two sliders.

[0010] The rotation of the double-ended screw can drive the sliders set on the guide rod to slide. Since the two sliders are set at the two ends of the double-ended screw, the double-ended screw moves in opposite directions, that is, the two sliders will move closer or further apart at the same time.

[0011] Preferably, the micro motor is a bidirectional lead screw motor, and the double-ended screw is the rotor shaft of the bidirectional lead screw motor.

[0012] It has better integration and can significantly save overall space.

[0013] Preferably, the guide rods are respectively provided on both sides of the double-ended screw. This can improve the stability of the slider support.

[0014] Preferably, both ends of the guide rod are fixed to the base, and the base fixes the bottom plate. This provides better support for the sliding rod.

[0015] Preferably, the base is fixed to the bottom plate by bolts. This simplifies the fixing process.

[0016] Preferably, the slider has a through hole for the guide rod to pass through, and a linear bearing that mates with the guide rod is disposed within the through hole. Using a linear bearing facilitates the sliding of the slider on the guide rod.

[0017] Preferably, the outer end of the clamping plate is provided with a connector corresponding to the outer side of the slider, and the connector is connected to the slider. This facilitates connection with the slider.

[0018] Preferably, the connector and the slider are connected by bolts. This simplifies the connection process.

[0019] Preferably, the connector and the slider are connected by a C-shaped interlocking fastener. This results in a more stable connection.

[0020] The beneficial effects of this utility model are:

[0021] The syringe plunger can be locked by two clamps with notches, and the tail plate of the plunger can be blocked by a baffle to achieve multi-angle locking of the plunger, preventing the plunger from loosening and enabling more effective plunger movement. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only two of the drawings in this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a perspective view of an embodiment of the present invention in conjunction with a syringe;

[0024] Figure 2 This is a perspective view of an embodiment of the present utility model;

[0025] The components are: 1. base plate; 2. clamping plate; 3. double-ended screw; 4. guide rod; 5. slider; 6. inner notch; 7. baffle; 8. syringe. Detailed Implementation

[0026] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model.

[0027] Example

[0028] like Figure 1 As shown, a syringe piston rod clamping mechanism includes a base plate 1, a baffle 7, a clamping plate 2, a double-ended screw 3, a slider 5, and a guide rod 4. The base plate 1 is provided with the baffle 7 facing upwards. The clamping plates 2 are provided in front of the baffle 7, and the inner side of the clamping plate 2 is provided with an inner notch 6 for the syringe 8 plunger to pass through. A gap is left between the clamping plate 2 and the baffle 7 to place the tail plate of the syringe 8 plunger. The double-ended screw 3 is rotatably disposed relative to the base plate 1. The double-ended screw 3 is driven by a micro motor, and the two ends of the double-ended screw 3 are respectively threaded to the slider 5. The guide rod 4 is arranged parallel to the double-ended screw on the base plate 1, and the slider 5 is slidably engaged with the guide rod 4. The two clamping plates 2 are respectively fixed to the two sliders 5.

[0029] The rotation of the double-ended screw 3 can drive the slider 5 set on the guide rod 4 to slide. Since the two sliders 5 are respectively set at both ends of the double-ended screw 3, the double-ended screw 3 moves in opposite directions, that is, the two sliders 5 will move closer or further apart at the same time.

[0030] The micro motor is a bidirectional lead screw motor, and the double-ended screw 3 is the rotor shaft of the bidirectional lead screw motor. This design offers better integration and significantly saves overall space.

[0031] The guide rods 4 are respectively provided on both sides of the double-ended screw 3. This improves the stability of the support for the slider 5.

[0032] Both ends of the guide rod 4 are fixed to the base, and the base fixes the bottom plate 1. This provides better support for the sliding rod. The base is fixed to the bottom plate 1 with bolts, making the fixing process simpler.

[0033] The slider 5 has a through hole through which the guide rod 4 passes, and a linear bearing that mates with the guide rod 4 is installed in the through hole. Using a linear bearing makes it easier for the slider 5 to slide on the guide rod 4.

[0034] The outer end of the clamping plate 2 is provided with a connector corresponding to the outer side of the slider 5, and the connector is connected to the slider 5. This facilitates connection with the slider 5.

[0035] The connector and the slider 5 are connected by bolts, simplifying the connection. Alternatively, the connector and the slider 5 can be connected using a C-shaped interlocking mechanism, resulting in a more stable connection.

[0036] The beneficial effects of this utility model are:

[0037] The plunger of the syringe 8 can be locked by two clamps 2 with notches. The tail plate of the plunger is blocked by the baffle 7, which can lock the plunger at multiple angles to prevent it from loosening and drive the plunger to move more effectively.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A syringe piston push rod clamping mechanism, characterized by, The utility model relates to a medicine injection device, which comprises a base plate (1), a baffle (7), a clamping plate (2), a double-end screw rod (3), a sliding block (5) and a guide rod (4). The baffle (7) is arranged on the base plate (1) upward, the left and right clamping plates (2) are arranged in front of the baffle (7), the inner side of the clamping plate (2) is provided with an inner notch (6) for the syringe (8) push rod, and the gap between the clamping plate (2) and the baffle (7) is used for placing the tail plate of the syringe (8) push rod. The double-end screw rod (3) is rotatably arranged on the base plate (1) and driven by a micro motor, and the two ends of the double-end screw rod (3) are respectively threadedly connected with the sliding blocks (5). The guide rods (4) are arranged on the base plate (1) in parallel with the double-end screw rod (3), and the sliding blocks (5) are slidably connected with the guide rods (4). The two clamping plates (2) are respectively fixed on the two sliding blocks (5).

2. A syringe piston rod gripping mechanism according to claim 1, characterized in that: The micro motor is a bidirectional screw rod motor, and the double-end screw rod (3) is a rotor shaft of the bidirectional screw rod motor.

3. A syringe piston rod gripping mechanism according to claim 1, wherein: The guide rods (4) are respectively arranged on the two sides of the double-end screw rod (3).

4. A syringe piston rod gripping mechanism according to claim 1, wherein: The two ends of the guide rods (4) are respectively fixed on a base, and the base fixes the base plate (1).

5. A syringe piston rod gripping mechanism according to claim 4, wherein: The base is fixed on the base plate (1) by bolts.

6. A syringe piston rod gripping mechanism according to claim 1, wherein: The sliding blocks (5) are provided with through holes for the guide rods (4) to pass through, and the through holes are provided with linear bearings matched with the guide rods (4).

7. A syringe piston rod gripping mechanism according to claim 1, wherein: The outer ends of the clamping plates (2) are provided with connecting heads corresponding to the outer sides of the sliding blocks (5), and the connecting heads are connected with the sliding blocks (5).

8. A syringe piston rod gripping mechanism according to claim 7, wherein: The connecting heads and the sliding blocks (5) are connected by bolts.

9. A syringe piston rod gripping mechanism according to claim 8, wherein: The connecting heads and the sliding blocks (5) are connected in a C-shaped mutual gripping and buckling mode.

Images