A rapid sampler for quality detection of gentamicin sulfate injection

Abstract

The utility model relates to medicine production sampling technical field, concretely relates to a quick sampler for gentamicin sulfate injection quality detection, including horizontal sampling pipe, the inside of horizontal sampling pipe is provided with closed sampling bin, still include: connecting sampling pipe, the top left side of horizontal sampling pipe is connected and set up, the top of connecting sampling pipe is provided with connecting flange, the bottom of connecting sampling pipe passes through the intercommunication of connecting delivery port and closed sampling bin with each other, sampling delivery pipe, the right side of bottom of horizontal sampling pipe is connected and set up. The utility model discloses through the movement of moving plunger and adjusting plunger, realizes the quantitative extraction, conveying and extrusion output sampling of injection in proper order, utilizes the scale graduation on moving plunger, can accurate control the volume of each sampling, guarantees the consistency of sample and the accuracy of experimental result, adopts the closed system to sample, effectively avoids the invasion of outside pollutant.

Description

Technical Field

[0001] This utility model relates to the field of drug production sampling technology, and in particular to a rapid sampler for quality testing of gentamicin sulfate injection. Background Technology

[0002] The production process of gentamicin sulfate injection mainly includes raw material preparation, solution filtration, filling and sealing, and terminal sterilization. In the concentration stage, the raw materials and solvents need to be mixed and prepared in a closed concentration tank. Then, impurities are removed through a multi-stage filtration system. Finally, after filling, it enters the sterilization process. Multiple sampling and testing are required after the concentrated solution is mixed, before the semi-finished product is filled, and at the finished product stage. The focus is on monitoring parameters such as the content of effective components, sterility indicators, and solution clarity.

[0003] Currently, most manufacturers use traditional pipettes or fixed-volume samplers for manual sampling. This requires repeatedly opening and closing the liquid preparation system interface, which poses a risk of introducing microbial contamination. Furthermore, existing sampling equipment generally uses fixed sampling tubes, which cannot achieve precise and rapid adjustment of the sampling volume. This makes it difficult to adapt to the different sample volume requirements of different testing items. Operators need to change different sizes of instruments, which seriously affects the testing efficiency. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a rapid sampler for quality testing of gentamicin sulfate injection, so as to solve the problem that existing sampling equipment generally uses fixed sampling tubes, which cannot achieve rapid adjustment of sampling volume, and requires the replacement of different specifications of instruments, thus affecting the testing efficiency.

[0005] To achieve the above objectives, this utility model provides a rapid sampler for quality testing of gentamicin sulfate injection, comprising a horizontal sampling tube, wherein the horizontal sampling tube has a closed sampling chamber inside, and further comprising:

[0006] A connecting sampling tube is provided at the top left of the horizontal sampling tube. The top of the connecting sampling tube is provided with a connecting flange, and the bottom of the connecting sampling tube is connected to the closed sampling chamber through a connecting delivery port.

[0007] A sampling delivery tube is connected to the bottom right side of the horizontal sampling tube. The bottom end of the sampling delivery tube is provided with a quick-connect interface, and the top end of the sampling delivery tube is connected to the closed sampling chamber through a sampling delivery port.

[0008] A movable plunger is horizontally nested and slidably disposed inside the right side of the closed sampling chamber, and the surface of the movable plunger is provided with scale markings.

[0009] The adjusting plunger is horizontally nested and slidably positioned inside the left side of the closed sampling chamber;

[0010] The connecting end faces of the movable plunger and the adjusting plunger are in contact with each other, and the contact point is located below the connecting conveyor port.

[0011] Furthermore, a limiting block is connected to the outer edge of the adjusting plunger. When the adjusting plunger slides to the right until the limiting block contacts and limits the movement of the left end of the horizontal sampling tube, the right end of the adjusting plunger is located directly above the sampling delivery port.

[0012] Furthermore, a translation rack is provided on the top of the movable plunger, and a translation gear is meshed with the outer side of the translation rack. The translation gear is rotatably connected to the horizontal sampling tube, and a sampling handle is connected to the shaft end of the translation gear.

[0013] Furthermore, a traction guide rod is horizontally connected to the middle of the left end face of the movable plunger, a closed guide sleeve is horizontally connected to the middle of the adjusting plunger, the traction guide rod is nested and slidably disposed inside the closed guide sleeve, an adjusting screw is connected to the left end of the traction guide rod, a horizontal guide rod is horizontally connected to the outer end of the adjusting plunger, a guide sleeve is nested and slidably connected to the outer side of the horizontal guide rod, a positioning adjustment frame is connected to the outer side of the guide sleeve, an adjusting screw sleeve is rotatably connected to the center of the positioning adjustment frame, the adjusting screw sleeve and the adjusting screw are nested and connected to each other, and an adjusting handle is connected to the outer side of the adjusting screw sleeve.

[0014] Furthermore, a locking guide groove is vertically provided on the inner bottom side of the adjusting plunger, and a locking block is vertically slidably fitted in the middle of the locking guide groove. A first locking groove and a second locking groove are respectively provided on the left and right sides of the bottom of the closed sampling chamber. The first locking groove and the second locking groove are configured to cooperate with the locking block. When the locking block is fitted inside the first locking groove, the right end face of the adjusting plunger is located directly below the connecting conveying port. When the locking block is fitted inside the second locking groove, the right end face of the adjusting plunger is located directly above the sampling conveying port.

[0015] Furthermore, a first unlocking guide groove and a second unlocking guide groove are respectively provided on the left and right sides of the locking guide groove. A first unlocking rod and a second unlocking rod are respectively nested and slidably arranged inside the first unlocking guide groove and the second unlocking guide groove. A first return spring and a second return spring are respectively nested on the outer sides of the first unlocking rod and the second unlocking rod. An unlocking ramp is provided at the right end of the first unlocking rod and the left end of the second unlocking rod. Guide ramps are provided on both the left and right sides of the locking block. The unlocking ramps and the guide ramps are configured to cooperate with each other. When the first unlocking rod or the second unlocking rod moves to one side of the locking block, the unlocking ramps and the guide ramps push the locking block downward to disengage from the first locking groove or the second locking groove. The left end of the first unlocking rod and the right end of the second unlocking rod are respectively set to protrude from the left and right end faces of the adjusting plunger. The first unlocking rod and the positioning adjustment frame are configured to correspond to each other.

[0016] The beneficial effects of this utility model are as follows: As can be seen from the above description, the rapid sampler for quality testing of gentamicin sulfate injection provided by this utility model can sequentially realize the quantitative extraction, transportation and extrusion sampling of the injection solution by moving the plunger and adjusting the movement of the plunger. The scale on the moving plunger can accurately control the volume of each sample, ensuring the consistency of the sample and the accuracy of the experimental results. The use of a closed system for sampling effectively avoids the intrusion of external contaminants. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model 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 only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the horizontal sampling tube according to an embodiment of the present invention;

[0019] Figure 2 This is a front structural diagram of an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the external structure of an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the closed sampling chamber according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the movable plunger according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the adjusting plunger in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the locking block in an embodiment of the present invention.

[0025] The diagram is marked as follows:

[0026] 1. Horizontal sampling tube; 101. Enclosed sampling chamber; 102. First locking groove; 103. Second locking groove; 2. Connecting sampling tube; 201. Connecting conveying port; 202. Connecting flange; 3. Sampling conveying tube; 301. Sampling conveying port; 302. Quick-connect interface; 4. Translation gear; 401. Sampling handle; 5. Moving plunger; 501. Translation rack; 502. Scale graduations; 503. Traction guide rod; 504. Adjusting screw; 6. Adjusting plunger; 601 602. Closed guide sleeve; 603. Horizontal guide rod; 604. Limiting block; 605. Locking guide groove; 606. Locking block; 607. Guide slope; 708. Positioning adjustment bracket; 709. Adjusting screw sleeve; 7000. Adjusting handle; 701. Guide slide sleeve; 802. First unlocking guide groove; 803. First unlocking top rod; 804. First return spring; 805. Unlocking slope; 906. Second unlocking guide groove; 907. Second unlocking top rod; 908. Second return spring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0028] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, a rapid sampler for quality testing of gentamicin sulfate injection includes a horizontal sampling tube 1, the interior of which is provided with a closed sampling chamber 101, and further includes:

[0030] The sampling tube 2 is connected and set at the top left of the horizontal sampling tube 1. The top of the sampling tube 2 is provided with a connecting flange 202, and the bottom of the sampling tube 2 is connected to the closed sampling chamber 101 through the connecting delivery port 201.

[0031] The sampling and delivery pipe 3 is connected to the bottom right side of the horizontal sampling pipe 1. The bottom end of the sampling and delivery pipe 3 is provided with a quick-connect interface 302, and the top end of the sampling and delivery pipe 3 is connected to the closed sampling chamber 101 through the sampling and delivery port 301.

[0032] The movable plunger 5 is horizontally nested and slidably disposed inside the right side of the closed sampling chamber 101, and the surface of the movable plunger 5 is provided with scale markings 502.

[0033] Adjust the plunger 6, which is horizontally nested and slidably positioned inside the closed sampling chamber 101 on the left side;

[0034] The connecting end faces of the movable plunger 5 and the adjusting plunger 6 are in contact with each other, and the contact point is located below the connecting conveyor port 201.

[0035] In this embodiment, the device is connected to the production delivery pipeline via the sampling tube 2. The injection solution can be delivered to the closed sampling chamber 101 through the sampling tube 2 and the delivery port 201. The closed sampling chamber 101 is completely filled by the moving plunger 5 and the adjusting plunger 6. During sampling, the moving plunger 5 is moved to the right to allow the solution to enter between the moving plunger 5 and the adjusting plunger 6. The surface of the moving plunger 5 is provided with a scale 502. By controlling the moving distance, the amount of solution entering between the moving plunger 5 and the adjusting plunger 6, i.e., the single sampling amount, can be adjusted. Then, the adjusting plunger 6 is pushed to the right. During the movement of the adjusting plunger 6, the delivery port 201 is closed, and the sampling is promoted. The injection solution and the moving plunger 5 move synchronously to the right until the moving plunger 5 moves to the right side of the sampling delivery port 301. At this time, the solution is delivered through the sampling delivery port 301 and the sampling delivery tube 3 to the sampling bottle connected by the quick connector 302. By adjusting the continuous movement of the plunger 6, the injection solution is completely squeezed and pushed to the sampling bottle to realize the sampling work. Then, the moving plunger 5 is pushed back to reset. Thus, the device can realize rapid sampling through simple mechanical operation. Using the scale 502 on the moving plunger 5, the volume of each sample can be accurately controlled, ensuring the consistency of the sample and the accuracy of the experimental results. The use of a closed system for sampling effectively avoids the intrusion of external contaminants.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, preferably, both the adjusting plunger 6 and the moving plunger 5 of the device are connected to a limiting block 603 at their outer edges. When the adjusting plunger 6 slides to the right until the limiting block 603 contacts the left end of the horizontal sampling tube 1, the right end of the adjusting plunger 6 is directly above the sampling delivery port 301. When the moving plunger 5 slides to the left until the limiting block 603 contacts the right end of the horizontal sampling tube 1, the left end of the moving plunger 5 is directly above the sampling delivery port 301. This ensures that when the adjusting plunger 6 slides to the right until its limiting block 603 contacts the left end of the horizontal sampling tube 1, it can be precisely limited. At this time, the right end of the adjusting plunger 6 is exactly above the sampling delivery port 301. This not only ensures that the adjusting plunger 6 has sufficient stroke when pushing the injection liquid into the sampling delivery tube 3, but also avoids the risk of equipment damage or operational errors due to excessive pushing.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, preferably, the top of the movable plunger 5 of the device is provided with a translation rack 501, and a translation gear 4 is meshed with the outer side of the translation rack 501. The translation gear 4 is rotatably connected to the horizontal sampling tube 1, and a sampling handle 401 is connected to the shaft end of the translation gear 4. The translation gear 4 can be driven to rotate by rotating the sampling handle 401. The rotational motion of the translation gear 4 is converted into the linear movement of the movable plunger 5 through the meshing translation rack 501. The position of the movable plunger 5 can be adjusted according to the required sampling amount. Rotating the sampling handle 401 clockwise or counterclockwise can move the movable plunger 5 to the right or left, respectively. Since the design of the translation rack 501 and the gear has high transmission efficiency and precision, the position of the movable plunger 5 can be controlled very accurately, thereby precisely adjusting the sample volume in the closed sampling chamber 101, making the operation more convenient.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, preferably, a traction guide rod 503 is horizontally connected to the middle of the left end face of the movable plunger 5 of the device, and a closed guide sleeve 601 is horizontally connected to the middle of the adjusting plunger 6. The traction guide rod 503 is nested and slidably disposed inside the closed guide sleeve 601. An adjusting screw 504 is connected to the left end of the traction guide rod 503. A horizontal guide rod 602 is horizontally connected to the outer end of the adjusting plunger 6. A guide sleeve 703 is nested and slidably connected to the outer side of the horizontal guide rod 602. A positioning adjustment frame 7 is connected to the outer side of the guide sleeve 703. An adjusting screw sleeve 701 is rotatably connected to the center of the positioning adjustment frame 7. The adjusting screw sleeve 701 and the adjusting screw 504 are nested and connected to each other. An adjusting handle 702 is connected to the outer side of the adjusting screw sleeve 701. Rotating the adjusting handle 702 can drive the adjusting screw sleeve 701 to rotate. This causes the positioning adjustment frame 7 to move left and right along the horizontal guide rod 602. The horizontal guide rod 602 is also equipped with a scale 502 to adjust the distance between the positioning adjustment frame 7 and the outer end of the adjusting plunger 6. When sampling is required, the moving plunger 5 moves to the right, and the positioning adjustment frame 7 moves synchronously through the traction guide rod 503 and the adjusting screw 504. When the positioning adjustment frame 7 moves to contact the outer end of the adjusting plunger 6, it can pull the adjusting plunger 6 to move synchronously. By rotating the adjusting handle 702 to adjust the position of the adjusting screw sleeve 701, the distance between the positioning adjustment frame 7 and the outer end of the adjusting plunger 6 can be changed, thereby adjusting the distance the moving plunger 5 moves to the right. Finally, precise control of the single sampling amount can be achieved. The sampling amount can be adjusted quickly and conveniently according to actual needs without changing equipment or components, which improves the flexibility of operation.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, preferably, a locking guide groove 604 is vertically provided on the bottom side of the inner side of the adjusting plunger 6 of the device. A locking block 605 is vertically slidably fitted in the middle of the locking guide groove 604. A first locking groove 102 and a second locking groove 103 are respectively provided on the left and right sides of the bottom of the closed sampling chamber 101. The first locking groove 102 and the second locking groove 103 are configured to cooperate with the locking block 605. When the locking block 605 is fitted inside the first locking groove 102, the right end face of the adjusting plunger 6 is located directly below the connecting conveying port 201. When the locking block 605 is fitted inside the second locking groove 103, the right end face of the adjusting plunger 6 is located directly above the sampling conveying port 301. A first locking groove 605 is provided on the left and right sides of the locking guide groove 604. The first unlocking guide groove 8 and the second unlocking guide groove 9 are respectively nested and slidably arranged with a first unlocking rod 801 and a second unlocking rod 901 on their inner sides. A first return spring 802 and a second return spring 902 are respectively nested and arranged on the outer sides of the first unlocking rod 801 and the second unlocking rod 901. An unlocking inclined surface 803 is provided at the right end of the first unlocking rod 801 and the left end of the second unlocking rod 901. Guide inclined surfaces 606 are provided on both the left and right sides of the locking block 605. The unlocking inclined surface 803 and the guide inclined surface 606 are configured to cooperate with each other. When the first unlocking rod 801 or the second unlocking rod 901 moves towards the locking block 605, it is slidably arranged by the unlocking inclined surface 803 and the guide inclined surface 606. 6. Push the locking block 605 downward to disengage from the first locking groove 102 or the second locking groove 103. The left end of the first unlocking rod 801 and the right end of the second unlocking rod 901 protrude from the left and right end faces of the adjusting plunger 6, respectively. The first unlocking rod 801 and the positioning adjustment frame 7 are correspondingly positioned. Therefore, during sampling, the adjusting plunger 6 is fixed in position by being embedded in the first locking groove 102 by the locking block 605, preventing the moving plunger 5 from moving under pressure when drawing injection fluid. When the moving plunger 5 moves a set distance, the positioning adjustment frame 7 contacts the outer end of the adjusting plunger 6. At this time, the positioning adjustment frame 7 pushes the first unlocking rod 801 to move to the right, thereby pushing the locking block 605 upward to achieve synchronous unlocking. After the movable plunger 5 moves the adjusting plunger 6 above the sampling delivery port 301, the movable plunger 5 moves to the left. At this time, the first unlocking push rod 801 and the locking block 605 lose their push and reset. The locking block 605 engages with the second locking groove 103 to lock the adjusting plunger 6, preventing the movable plunger 5 from moving under pressure when it squeezes and pushes the injection liquid. This continues until the movable plunger 5 has completely squeezed out the solution. At this point, the end faces of the movable plunger 5 and the adjusting plunger 6 are in contact with each other. This pushes the second unlocking push rod 901 to the left through the end face of the movable plunger 5, which in turn pushes the locking block 605 upward to achieve synchronous unlocking. This pushes the adjusting plunger 6 to reset. Thus, the locking mechanism ensures the stability and accuracy of the adjusting plunger 6 at different operating stages.To prevent accidental movement that could lead to operational errors or equipment damage, this system ensures accuracy and consistency in every operation, reduces the impact of human error, and simplifies the operation process by utilizing automatic unlocking and reset mechanisms, making the entire sampling process smoother and more efficient.

[0040] The rapid sampler for quality testing of gentamicin sulfate injection provided by this utility model can sequentially achieve quantitative extraction, delivery and extrusion sampling of the injection solution by moving plunger 5 and adjusting plunger 6. The scale 502 on the moving plunger 5 can accurately control the volume of each sample, ensuring the consistency of the sample and the accuracy of the experimental results. The closed system sampling effectively avoids the intrusion of external contaminants.

[0041] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this utility model is limited to these examples; within the framework of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this utility model as described above, which are not provided in the details for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rapid sampler for quality testing of gentamicin sulfate injection, comprising a horizontal sampling tube (1), wherein the horizontal sampling tube (1) has a closed sampling chamber (101) disposed inside, characterized in that, Also includes: A connecting sampling tube (2) is connected and set on the top left side of the horizontal sampling tube (1). A connecting flange (202) is provided at the top of the connecting sampling tube (2). The bottom end of the connecting sampling tube (2) is connected to the closed sampling chamber (101) through the connecting delivery port (201). A sampling delivery tube (3) is connected to the bottom right side of the horizontal sampling tube (1). The bottom end of the sampling delivery tube (3) is provided with a quick-connect interface (302). The top end of the sampling delivery tube (3) is connected to the closed sampling chamber (101) through the sampling delivery port (301). A movable plunger (5) is horizontally nested and slidably disposed inside the right side of the closed sampling chamber (101), and the surface of the movable plunger (5) is provided with a scale (502); Adjust the plunger (6), which is horizontally nested and slidably positioned inside the closed sampling chamber (101) on the left side; The connecting end faces of the movable plunger (5) and the adjusting plunger (6) are in contact with each other, and the contact point is located below the connecting conveying port (201).

2. The rapid sampler for quality testing of gentamicin sulfate injection according to claim 1, characterized in that, A limiting block (603) is connected to the outer edge of the adjusting plunger (6). When the adjusting plunger (6) slides to the right until the limiting block (603) contacts the left end of the horizontal sampling tube (1), the right end of the adjusting plunger (6) is directly above the sampling delivery port (301).

3. The rapid sampler for quality testing of gentamicin sulfate injection solution according to claim 1, characterized in that, The top of the movable plunger (5) is provided with a translation rack (501), and a translation gear (4) is meshed with the outer side of the translation rack (501). The translation gear (4) is rotatably connected to the horizontal sampling tube (1), and a sampling handle (401) is connected to the shaft end of the translation gear (4).

4. The rapid sampler for quality testing of gentamicin sulfate injection according to claim 1, characterized in that, A traction guide rod (503) is horizontally connected to the middle of the left end face of the movable plunger (5). A closed guide sleeve (601) is horizontally connected to the middle of the adjusting plunger (6). The traction guide rod (503) is nested and slidably disposed inside the closed guide sleeve (601). An adjusting screw (504) is connected to the left end of the traction guide rod (503). A horizontal guide rod (602) is horizontally connected to the outer end of the adjusting plunger (6). A guide sleeve (703) is nested and slidably connected to the outer side of the horizontal guide rod (602). A positioning adjustment frame (7) is connected to the outer side of the guide sleeve (703). An adjusting screw sleeve (701) is rotatably connected to the center of the positioning adjustment frame (7). The adjusting screw sleeve (701) and the adjusting screw (504) are nested and connected to each other. An adjusting handle (702) is connected to the outer side of the adjusting screw sleeve (701).

5. The rapid sampler for quality testing of gentamicin sulfate injection according to claim 4, characterized in that, The adjusting plunger (6) has a vertically arranged locking guide groove (604) on its inner bottom side. A locking block (605) is vertically slidably fitted in the middle of the locking guide groove (604). The bottom left and right sides of the closed sampling chamber (101) are respectively provided with a first locking groove (102) and a second locking groove (103). The first locking groove (102) and the second locking groove (103) are fitted with the locking block (605). When the locking block (605) is fitted inside the first locking groove (102), the right end face of the adjusting plunger (6) is located directly below the connecting conveying port (201). When the locking block (605) is fitted inside the second locking groove (103), the right end face of the adjusting plunger (6) is located directly above the sampling conveying port (301).

6. The rapid sampler for quality testing of gentamicin sulfate injection according to claim 5, characterized in that, The locking guide groove (604) has a first unlocking guide groove (8) and a second unlocking guide groove (9) on its left and right sides, respectively. A first unlocking push rod (801) and a second unlocking push rod (901) are slidably nested inside the first unlocking guide groove (8) and the second unlocking guide groove (9), respectively. A first reset spring (802) and a second reset spring (902) are slidably nested outside the first unlocking push rod (801) and the second unlocking push rod (901), respectively. An unlocking ramp (803) is provided at the right end of the first unlocking push rod (801) and the left end of the second unlocking push rod (901). The locking block (605) has unlocking ramps (803) on both its left and right sides. There is a guide slope (606), and the unlocking slope (803) and the guide slope (606) are configured to cooperate with each other. When the first unlocking rod (801) or the second unlocking rod (901) moves toward the locking block (605), the unlocking slope (803) and the guide slope (606) push the locking block (605) downward to disengage from the first locking groove (102) or the second locking groove (103). The left end of the first unlocking rod (801) and the right end of the second unlocking rod (901) are respectively set to protrude from the left and right end faces of the adjusting plunger (6). The first unlocking rod (801) and the positioning adjustment frame (7) are configured to correspond to each other.

Images