Glue gun
By designing a glue gun with a push rod, a push device, and a backstop device, the problem of uneven injection of non-Newtonian liquids in minimally invasive surgery was solved, achieving quantitative and stable injection results.
Patent Information
- Application Number
- CN202422989473.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-04
AI Technical Summary
In minimally invasive surgery, the high viscosity of non-Newtonian liquids makes it difficult for the pushing device to achieve precise feeding, and large reaction forces may lead to drug administration failure or unevenness.
A glue gun was designed, comprising a push rod, a push device, a backstop device, and a return spring. Through intermittent rotational motion and a meshing structure, it ensures consistent push volume each time, prevents reverse motion, and achieves quantitative injection.
It enables stable and quantitative injection of non-Newtonian liquids, improves injection accuracy, and reduces the risk of reverse syringe movement caused by reaction force.
Smart Images
Figure CN223731433U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a glue gun. Background Technology
[0002] During minimally invasive surgical interventions, it is often necessary to inject a precise amount of non-Newtonian fluids (such as bio-glue) into the patient's body. Many non-Newtonian fluids have high viscosity, requiring significant pushing force. When squeezed, the pressure is not immediately released completely but rather slowly. During this process, a continuous reaction force is exerted on the syringe. Therefore, if the reaction force is too large, the pushing device may fail to deliver the intended feed, requiring multiple pushes to reach a lower pressure before the feed can be completed. This can lead to drug administration failure or uneven drug delivery. Utility Model Content
[0003] The purpose of this utility model is to provide a glue gun in order to solve the above problems.
[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution:
[0005] A glue gun, including a housing;
[0006] An actuating rod is disposed within the housing, with the distal end of the actuating rod extending into the interior of the syringe and the actuating rod passing through a threaded hole within the housing;
[0007] A propulsion device is provided, which contacts the surface of the propulsion rod. The propulsion device is used to intermittently propel the propulsion rod to rotate, and the angle of propulsion is the same each time the propulsion rod is advanced.
[0008] A backstop device is provided, which engages with the push rod and is used to prevent the push rod from retracting.
[0009] As a further description of the above technical solution, the housing includes a first chamber and a second chamber, and a middle partition is provided between the first chamber and the second chamber. The middle partition is provided with a threaded hole that cooperates with the push rod.
[0010] As a further description of the above technical solution, a wrench is provided at the lower end of the housing. The wrench is connected to the pusher, and the pusher is connected to the pusher claw through a return spring. The pusher claw is engaged with the pusher rod.
[0011] As a further description of the above technical solution, the push rod includes a front end and a rear end. The front end is a threaded rod, and the surface of the rear end is provided with a plurality of circumferentially repeating and uniformly distributed tooth-like structures. The front end is located in a first chamber, and the rear end is located in a second chamber.
[0012] As a further description of the above technical solution, the threaded rod has a double-threaded structure.
[0013] As a further description of the above technical solution, the diameter of the rear end portion is larger than the diameter of the front end portion.
[0014] As a further description of the above technical solution, the propulsion device includes a propulsion claw, which is connected to the interior of the housing via a return spring.
[0015] As a further description of the above technical solution, the anti-reverse device includes an anti-reverse pawl, which is disposed on one side of the rear end portion of the push rod and engages with the rear end of the push rod.
[0016] As a further description of the above technical solution, the pusher claw and the anti-reverse claw have the same structure.
[0017] As a further description of the above technical solution, a quick-return button is provided at the upper end of the housing near the rear end of the push rod.
[0018] The beneficial effects of this utility model are as follows:
[0019] 1. The glue gun of this utility model can quantitatively and stably inject non-Newtonian liquids from the syringe to the target position, which can effectively improve the injection accuracy and reduce the problem of reverse movement of the syringe caused by the reaction force of non-Newtonian fluids.
[0020] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description
[0021] Figure 1 This is a cross-sectional view of a glue gun;
[0022] Figure 2 yes Figure 1 A sectional view of part AA;
[0023] Figure 3 This is a schematic diagram of the casing of a glue gun;
[0024] Figure 4 yes Figure 3 A sectional view of the EE section;
[0025] Figure 5 yes Figure 3 A sectional view of the FF section;
[0026] Figure 6 This is a schematic diagram of the push rod structure.
[0027] Reference numerals: 1. Housing; 101. First chamber; 102. Second chamber; 103. Intermediate partition; 104. Threaded hole; 105. Wrench; 106. Pushing element; 107. Pushing claw; 2. Pushing rod; 201. Front end; 202. Rear end; 203. Knob; 3. Injector; 4. Return spring; 5. Anti-reverse claw; 6. Quick retraction button. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0029] like Figures 1-6 As shown, in one embodiment, a glue gun includes a housing 1, a syringe 3 fixed to one end of the housing 1, and a push rod 2 disposed at the other end of the housing 1. One end of the push rod 2 is connected to the syringe 3, and the push rod 2 can push the syringe 3 forward, thereby discharging non-Newtonian fluid from the syringe 3. A propulsion device is disposed inside the housing 1, which contacts the surface of the push rod 2. By adjusting the propulsion device, the push rod 2 can be intermittently propelled to rotate, with the same angle and distance of advancement for each stroke. This effectively injects non-Newtonian fluid to the target location, and the injection volume is controllable.
[0030] An anti-reverse device is also provided inside the housing 1. The anti-reverse device also engages with the push rod 2. The push rod 2 can be fixed in a stationary state by the anti-reverse device to prevent the push rod 2 from moving in the opposite direction due to the reaction force generated by the non-Newtonian liquid, that is, to prevent the push rod 2 from retracting and affecting the normal injection of the non-Newtonian liquid.
[0031] Optionally, the housing 1 includes a first chamber 101 and a second chamber 102. A middle partition 103 is provided between the first chamber 101 and the second chamber 102. A threaded hole 104 is provided on the middle partition 103 to cooperate with the push rod 2. By cooperating with the push rod 2 through the middle partition 103 and the threaded hole, the feed path of the push rod 2 can be fixed, and the occurrence of reverse movement of the push rod 2 can be effectively reduced.
[0032] Optionally, a handle is provided at the lower end of the housing 1 for easy handholding by the operator. A wrench 105 is provided on the inside of the handle, and the wrench 105 is connected to a pusher 106 inside the handle. The pusher 106 is connected to the pusher pawl 107 through an inclined return spring 4. By pressing the wrench 105, the pusher 106 is driven to move upward, causing the pusher pawl 107 to move the pusher rod 2, thereby realizing the feeding of the pusher rod 2. Each time the wrench 105 is pressed, the feed amount of the pusher rod 2 is the same, which effectively improves the accuracy of the single injection volume of the syringe 3.
[0033] Optionally, refer to Figure 6 The push rod 2 includes a front end 201 and a rear end 202, with a knob 203 located at the tail of the rear end 202. The front end 201 is a threaded rod, and the surface of the rear end 202 has multiple circumferentially repeating, evenly distributed toothed structures. The front end 201 is located within a first chamber 101, and the rear end 202 is located within a second chamber 102. The repeating units at the rear end 202 are asymmetrical structures, with the tangent angle of the section near the push rod 2 being greater than the tangent angle of the section away from the push rod 2. In some embodiments, the outer diameter of the rear end 202 of the push rod 2 is larger than the outer diameter of the front end 201, facilitating loading and unloading from the rear end, and simultaneously reducing the resistance arm during propulsion to a smaller power arm, making propulsion easier.
[0034] Optionally, the threaded rod at the front end 201 has a double-threaded structure, which can effectively reduce the situation where the push rod 2 moves backward due to the reaction force of the syringe 3.
[0035] Optionally, the propulsion device includes a propulsion claw 107, which is connected to the interior of the housing 1 via a return spring 4. The propulsion claw 107 is a vertical plate with teeth that mesh with the propulsion rod 2 on its side near the propulsion rod 2. After pressing the wrench 105, the propulsion claw 107 can move, allowing the teeth to drive the propulsion rod 2 to rotate, thereby realizing the feeding of the propulsion rod 2.
[0036] Optionally, the anti-reverse device includes an anti-reverse pawl 5, which is disposed on one side of the rear end 202 of the push rod 2. The anti-reverse pawl 5 engages with the rear end 202 of the push rod 2. The anti-reverse pawl 5 differs from the push rod 107 only in its axial position along the push rod 2. The push device is equipped with a limiting device, which includes a protrusion on the rear side of the wrench 105 and a groove shell on the housing 1 for guiding the return spring 4. The interior of the housing 1 also limits the progress of the push rod 107. This ensures that a single push is greater than one repeating unit of the push rod 2 but less than two repeating units, guaranteeing that one unit is fed each time.
[0037] Optionally, a quick-reverse button 6 is provided at the upper end of the housing 1 near the rear end 202 of the push rod 2. This disengages the push pawl 107 and the anti-reverse pawl 5 from the push rod 2, allowing the push rod 2 to reverse quickly. The quick-reverse button 6 contacts the push pawl 107 and the anti-reverse pawl 5. When the quick-reverse button 6 is pressed, it moves downwards, abutting against the push pawl 107 and the anti-reverse pawl 5, thus disengaging them from the push rod 2 and achieving a rapid reversal.
[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A glue gun characterized in that, The shell comprises: A propelling rod is arranged in the shell, and the distal end of the propelling rod extends into the interior of the syringe and the propelling rod is arranged in a threaded hole in the shell; A propelling device is in contact with the surface of the propelling rod, the propelling device is used for intermittently propelling the propelling rod to rotate, and the angle of each propulsion of the propelling rod is the same; A retreat-preventing device is engaged with the propelling rod, and the retreat-preventing device is used for preventing the propelling rod from retreating.
2. The glue gun of claim 1, wherein, The shell comprises a first chamber and a second chamber, and an intermediate partition plate is arranged between the first chamber and the second chamber, and the intermediate partition plate is provided with the threaded hole matched with the propelling rod.
3. The glue gun of claim 1, wherein, The lower end of the shell is provided with a wrench connected with a pushing piece, the pushing piece is connected with a propelling claw through a return spring, and the propelling claw is engaged with the propelling rod.
4. The glue gun of claim 2, wherein, The propelling rod comprises a front end and a rear end, the front end is a threaded rod, the surface of the rear end is provided with a plurality of circumferentially repeated and uniformly distributed tooth structures, the front end is arranged in the first chamber, and the rear end is arranged in the second chamber.
5. The glue gun of claim 4, wherein, The threaded rod is a double-thread structure.
6. The glue gun of claim 4, wherein, The diameter of the rear end is greater than that of the front end.
7. The glue gun of claim 4, wherein, The propelling device comprises a propelling claw connected with the interior of the shell through a return spring.
8. The glue gun of claim 7, wherein, The retreat-preventing device comprises a retreat-preventing claw arranged on one side of the rear end of the propelling rod, and the retreat-preventing claw is engaged with the rear end of the propelling rod.
9. The glue gun of claim 8, wherein, The propelling claw and the retreat-preventing claw have the same structure.
10. The glue gun of claim 4, wherein, The upper end of the shell is provided with a fast retreat button close to the position of the rear end of the propelling rod.