Glue injection gun with adjustable single injection amount and injection amount adjusting method

Abstract

The invention discloses a glue injection gun with an adjustable single injection amount and an injection amount adjusting method, and relates to the technical field of injectors. The glue injection gun with the adjustable single injection amount comprises a quantitative propelling module, and the quantitative propelling module comprises a shell, a propelling assembly and a driving assembly; the propelling assembly comprises a push rod and a propelling plate; the driving assembly comprises a first rotating shaft, a first rotating arm and a second rotating arm. The first rotating arm drives the second rotating arm to rotate, the arc-shaped surface of the second rotating arm is matched and clamped with the arc-shaped clamping groove of the propelling plate, and the pushed teeth on the bottom surface of the push rod are matched and engaged with the propelling teeth of the propelling plate, so that the second rotating arm can push the push rod to advance for a specific distance when rotating for a constant angle, and then the piston rod of the injector is pushed to advance for a specific distance; therefore, the single injection amount of the fluid medicament is controlled. Such form is simple in structure and convenient to operate, and a user can conveniently and accurately control the total injection amount of the fluid medicament within a specific time period by recording the number of times of pressing the first cantilever.

Description

Technical Field

[0001] This invention relates to the field of syringe technology, specifically to a glue gun with adjustable single injection volume and a method for adjusting the injection volume. Background Technology

[0002] Some treatment techniques require the injection of a specific amount of medication at a specific location in the blood vessel (e.g., injecting clotting gel for varicose veins in the lower extremities, or injecting coagulants during coronary stent surgery).

[0003] Some existing technologies use syringes for injection, which requires medical personnel to visually observe the scale lines while controlling the injection volume. However, the syringe piston has a small propulsion range, making precise control of the injection volume difficult. Some existing technologies use a glue gun to drive the syringe, which can achieve a constant single injection volume, but the single injection volume is difficult to adjust, resulting in a lack of operational flexibility. Summary of the Invention

[0004] In order to overcome the problem of "difficulty in flexibly controlling the injection volume of the syringe" in the above-mentioned background art, the present invention provides a glue gun with adjustable single injection volume and an injection volume adjustment method.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A dispensing gun with adjustable single-injection volume and a method for adjusting the injection volume include a quantitative propulsion module, which includes a housing, a propulsion assembly, and a drive assembly. The propulsion assembly includes a push rod and a propulsion plate, with the push rod's push teeth adapted to the propulsion teeth of the propulsion plate. The drive assembly includes a first rotating shaft, a first rotating arm, and a second rotating arm, with the arc-shaped surface at the end of the second rotating arm adapted to be engaged in the arc-shaped groove of the propulsion plate. When the first rotating arm rotates, it can drive the second rotating arm to rotate around the first rotating shaft as the rotation center, thereby pushing the propulsion plate and the push rod forward and squeezing out the fluid medication in the syringe.

[0006] As a further optimization of the present invention, the distance between the arcuate surface and the rotation center can be adjusted, and / or the single rotation angle of the second rotating arm can be adjusted, so as to adjust the single displacement of the push rod, which is used to adjust the single injection volume of the fluid agent.

[0007] As a further optimization of the present invention, the propulsion assembly further includes an upper clamping member, a lower clamping plate, and a first spring plate; the upper clamping member abuts against the upper surface of the push rod, and the lower clamping plate abuts against the lower surface of the push rod; one end of the first spring plate is connected to the propulsion plate, and the other end abuts against the bottom surface of the lower clamping plate; the first spring plate is used to apply torque to the propulsion plate, so that the propulsion tooth has a tendency to move upward and mesh with the pushed tooth.

[0008] As a further optimization of the present invention, the first spring is V-shaped.

[0009] As a further optimization of the present invention, the driving component further includes a second spring for driving the first rotating arm to rotate and reset.

[0010] As a further optimization of the present invention, the quantitative propulsion module further includes an unlocking component; the unlocking component includes a third spring, a pressing block, and a guide plate; one end of the third spring is fixedly connected to the housing, and the other end is fixedly connected to the pressing block; the bottom surface of the pressing block is provided with a guide plate; the top surface of the propulsion plate is provided with a pressing upright plate, the top surface of the pressing upright plate is pressed against the top surface of the guide plate and can slide relative to it; the pressing upright plate is located beside the push rod; when the pressing block is pressed down, it can push the pressing upright plate and the propulsion plate downward to the point that the pushed tooth and the propulsion tooth disengage, for the return reset of the push rod.

[0011] As a further optimization of the present invention, the first spring is used to drive the push plate to move upward and reset; the third spring is used to drive the lower pressure block to move upward and reset.

[0012] As a further optimization of the present invention, the push rod includes a horizontal plate and a vertical plate perpendicularly connected to the top surface of the horizontal plate; the push tooth is disposed on the bottom surface of the horizontal plate, and the upper clamping member includes a clamping tip and a clamping vertical plate; the clamping tip and the clamping vertical plate respectively abut against the two side walls of the vertical plate.

[0013] As a further optimization of the present invention, the connection position between the first rotating arm and the second rotating arm is provided with a plurality of insertion holes, and the first rotating shaft can be selectively inserted into any of the insertion holes.

[0014] A method for adjusting injection volume involves injecting a fluid agent using a glue gun with adjustable single injection volume; adjusting the distance between the arc-shaped surface and the rotation center and / or the single rotation angle of the second rotating arm can adjust the single injection volume of the fluid agent.

[0015] In summary, the present invention has at least one of the following advantages: (1) In this invention, the first rotating arm drives the second rotating arm to rotate. The arc-shaped surface of the second rotating arm is adapted to engage with the arc-shaped groove of the push plate, and the push teeth on the bottom surface of the push rod are adapted to engage with the push teeth of the push plate. When the second rotating arm rotates at a constant angle, it can push the push rod forward a specific distance, thereby pushing the piston rod of the syringe forward a specific distance to control the single injection volume of the fluid agent. This type of structure is simple and easy to operate. Users can conveniently and accurately control the total injection volume of the fluid agent within a specific time period by recording the number of times the first cantilever is pressed.

[0016] (2) The first spring can rebound, which is used to make the push plate have an upward rotation tendency; on the one hand, after the push plate returns, the push tooth and the pushed tooth can be engaged again; on the other hand, after the push rod returns and is reset by using the unlocking component, the push tooth and the pushed tooth can be engaged again for continuous operation of the present invention.

[0017] (3) The guide plate and the lower pressure plate are pressed together and slidably connected; on the one hand, they are used to guide the laterally moving push plate and improve its lateral stability; on the other hand, they enable the lower pressure block to press down the push plate without contacting the push rod, thereby avoiding the problem of reduced injection accuracy caused by the push rod bending under force.

[0018] (4) The single extrusion volume of the fluid agent can be adjusted by adjusting the distance between the arc-shaped surface and the rotation center or the single rotation angle of the second rotating arm. This invention utilizes a simple principle for control, thereby simplifying the mechanical structure as much as possible while achieving the adjustment function, and improving the reliability and stability of the transmission.

[0019] (5) The first rotating arm includes an upper arm and a lower arm that are rotatably connected; the lateral thrust can be selectively applied to the side of the upper arm or the side of the lower arm, and the single rotation angle of the first rotating arm can be adjusted, thereby adjusting the single rotation angle of the second rotating arm. During the operation, the user can flexibly select the single injection volume by flexibly selecting the pressing position of the present invention, thus achieving the technical effect of convenient operation.

[0020] (6) The adjusting sleeve connected by the thread has a self-locking function, and the cross-shaped groove is hidden inside the first rotating arm (rather than exposed). Only by using a tool (such as a screwdriver) can the single extrusion volume of the fluid agent be adjusted. On the one hand, this avoids the problem of users accidentally touching the first rotating arm and causing unnecessary adjustment of the single extrusion volume of the fluid agent, thereby reducing the occurrence of medical accidents; on the other hand, it retains a certain degree of ease of operation.

[0021] (7) On the one hand, the push block can only withstand the downward pressure (to drive the first rotating shaft to move downward) but cannot withstand the upward thrust, and the sliding plate can only withstand the upward thrust (to drive the first rotating shaft to move upward) but cannot withstand the downward pressure, which solves the problem of accidental contact by the user and improves safety; on the other hand, the single extrusion amount of the fluid agent can be adjusted by simply pressing down the push block and pushing up the sliding plate, making the operation steps simpler and the efficiency higher. Attached Figure Description

[0022] The present application will be further explained below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall front structure of the present invention; Figure 2 This is a front view of the structure of the present invention. Figure 3 This is a front view diagram of the drive component structure; Figure 4 This is a front view schematic diagram of the connection structure between the push rod and the push plate; Figure 5 This is a front view schematic diagram of the connection structure between the first and second rotating arms. Figure 6 Front view diagram of the component structure for unlocking; Figure 7 This is a top-down view of the pressing block in its pressed-down state; Figure 8 This is a top-view diagram showing the position of the upper clamping component and the structure. Figure 9 This is a schematic diagram of the upper clamping component holding the vertical plate at an angle from below. Figure 10 This is a front view schematic diagram of the shell structure; Figure 11 This is a front view schematic diagram of the connection structure between the housing and the syringe; Figure 12 This is a front view schematic diagram of the connection structure between the upper arm and the lower arm; Figure 13 This is a front view diagram showing the location and structure of the interlocking groove. Figure 14 A front view diagram showing the stop protrusion abutting against the engagement groove; Figure 15 A frontal view of the stop protrusion in contact with the side wall of the lower arm; Figure 16 This is a front view diagram showing the position and structure of the lifting assembly; Figure 17 This is a schematic diagram of the position of the lifting block and the front view of the structural elevation section. Figure 18 A front view schematic diagram of the explosion state of the lifting block and the first rotating shaft; Figure 19 This is a front view diagram showing the location and structure of the first slot; Figure 20 This is a front view diagram showing the location and structure of the second strip hole; Figure 21 A front view diagram showing the push block positioned at the bottom of the side slide groove; Figure 22 Right view schematic diagram of the push block positioned at the bottom of the side slide groove; Figure 23 This is a front view diagram showing the sliding plate in its installed state. Figure 24 A top-view cross-section of the sliding plate in its installed state; Figure 25 A front view diagram showing the sliding plate positioned at the top of the side wall of the limiting vertical frame; Figure 26This is a right-side view of the vertical section of the structure with the sliding plate positioned at the top of the side wall of the limiting vertical frame.

[0023] Explanation of reference numerals in the attached figures: In the picture, 1. Housing; 101. Propulsion groove; 102. Clamping slot; 103. Abutment hole; 104. Top hole; 105. Back side insertion hole; 106. End positioning hole; 11. Clamping horizontal plate; 12. First vertical plate; 13. Vertical baffle; 14. Side insertion hole; 2. Propulsion assembly; 21. Upper clamping component; 211. Clamping tip; 2111. First balancing fin; 2112. First side rib; 212. Clamping vertical plate; 2121. Second balancing fin; 2122. Second side rib; 213. Connecting plate; 22. Lower clamping plate; 23. Push rod; 230. Push tooth; 231. Horizontal plate; 232. Vertical plate; 233. Forward push plate; 24. Propulsion plate; 240. Propulsion tooth; 25. First spring; 250. Arc-shaped slot; 26. Lower pressing vertical plate; 3. Drive assembly; 30. Insertion hole; 301. First strip hole; 302. Second vertical rod; 303. Push block; 3031. Push inclined surface; 3032. Second side slot; 304. Side sliding groove; 3041. First side protrusion; 305. First pin hole; 31. First rotating shaft; 3101. First inclined end face; 3102. Second inclined end face; 311. Load-bearing fin; 32. 3201. First rotating arm; 3202. Lifting cavity; 3203. Guide hole; 321. Upper arm; 3211. Abutting bottom surface; 3212. Engaging bottom surface; 322. Lower arm; 3221. Abutting top surface; 3222. Engaging top surface; 323. Second rotating shaft; 324. Engaging groove; 33. Second rotating arm; 331. Arc-shaped surface; 34. Stop protrusion; 35. Second spring piece; 36. Abutting protrusion; 4. Unlocking component; 41. Third spring; 42. Pressing block; 421. Clearance groove; 43. Guide plate; 44. Fixing post; 45. C-shaped locking plate; 5. Syringe; 51. Needle; 511. Clamping fins; 52. Piston; 53. Piston rod; 6. Hollow guidewire; 7. Lifting assembly; 71. Lifting block; 710. Attaching to the vertical wall; 711. First inclined plane; 712. Second inclined plane; 713. Balance column; 72. Spring; 73. First vertical rod; 74. Adjusting sleeve; 1001, Second strip hole; 1002, Sliding plate; 10021, Second side protrusion; 10022, Upward inclined surface; 1003, End hole; 1004, Limiting horizontal frame; 1005, Limiting vertical frame; 10051, First vertical groove; 10052, Second side slot. Detailed Implementation

[0024] Based on the above-described structural features of this application, the implementation methods of this application will be further described as follows: Reference Figures 1-2 This embodiment provides a glue gun with adjustable single injection volume, including a quantitative propulsion module. The quantitative propulsion module includes a housing 1, a propulsion component 2, a drive component 3, and an unlocking component 4. The housing 1 provides structural support for the propulsion component 2, the drive component 3, and the unlocking component 4.

[0025] Reference Figures 2-4 The propulsion assembly 2 includes an upper clamping member 21, a lower clamping plate 22, a push rod 23, a propulsion plate 24, and a first spring piece 25. The propulsion plate 24 is positioned along the length of the push rod 23 and is located below the push rod. The bottom surface of the push rod 23 is provided with push teeth 230 (e.g., integrally fixedly connected), and there are several push teeth 230 arranged in a linear array with equal spacing along the length of the push rod 23; the different push teeth 230 have the same shape and size. The top surface of the propulsion plate 24 is provided with propulsion teeth 240 (e.g., integrally fixedly connected), and there are several propulsion teeth 240 arranged in a linear array with equal spacing along the length of the push rod 23; the different propulsion teeth 240 have the same shape and size.

[0026] When the pusher tooth 230 of the push rod 23 is adapted to the pusher tooth 240 of the pusher plate 24, the pusher tooth 240 and the pusher tooth 230 are engaged. When the pusher tooth 240 moves, it can push the pusher tooth 230 (and the push rod 23) to move, thereby squeezing out the fluid medicine in the syringe 5.

[0027] by Figure 2 and Figure 6 Taking the perspective shown as an example, the syringe 5 is installed at the right end of the housing 1. The tip of the push tooth 240 points to the upper right, and the tip of the push tooth 230 points to the lower left. When the push tooth 240 and the push tooth 230 are engaged, the push plate 24 (and the push tooth 240) can push the push rod 23 (and the push tooth 230) to the right when it moves to the right, so as to apply a thrust to the syringe 5 and squeeze out the fluid medicine in the syringe 5.

[0028] The first spring clip 25 is V-shaped. One end of the first spring clip 25 is connected to the end of the push plate 24 (integrated), and the other end abuts against the bottom surface of the lower clamping plate 22 (and can slide relative to it). The bottom surface of the connection position between the first spring clip 25 and the push plate 24 is provided with an arc-shaped groove 250. The lower clamping plate 22 is fixedly connected to the housing 1 (e.g., by bolts).

[0029] The first spring plate 25 is used to apply torque to the push plate 24, so that the push tooth 240 tends to move upward and mesh with the pushed tooth 230; at the same time, the push plate 24 can apply an upward thrust to the push rod 23.

[0030] Reference Figure 2 and Figure 10 The upper clamping member 21 abuts against the upper surface of the push rod 23 (and can slide relative to it), and the lower clamping plate 22 abuts against the lower surface of the push rod 23 (and can slide relative to it), thereby achieving clamping and limiting of the push rod 23 to keep one end of the push rod 23 in a horizontal state; a first upright plate 12 is fixedly installed in the inner cavity of the housing 1 (for example, by integral fixed connection), the bottom surface of the first upright plate 12 abuts against the top surface of the push rod 23 (and can slide relative to it), and the push plate 24 can apply an upward pushing force to the push rod 23, that is, the first upright plate 12 and the push plate 24 are used to achieve clamping and limiting of the other end of the push rod 23, that is, the other end of the push rod 23 is kept in a horizontal state; thus, the push rod 23 as a whole can keep in a horizontal state.

[0031] Reference Figure 3 , Figure 4 and Figure 5 The drive assembly 3 includes a first rotating shaft 31, a first rotating arm 32, and a second rotating arm 33. The first rotating arm 32 and the second rotating arm 33 are fixedly connected (e.g., by an integral fixed connection), so the second rotating arm 33 can rotate as the first rotating arm 32 rotates. The first rotating arm 32 rotates around the first rotating shaft 31; the second rotating arm 33 rotates around the first rotating shaft 31. The arc-shaped surface 331 at the end of the second rotating arm 33 is adapted to be engaged in the arc-shaped slot 250 of the push plate 24. When the first rotating arm 32 rotates, it can drive the second rotating arm 33 to rotate around the first rotating shaft 31 as the rotation center, which is used to push the push plate 24 and the push rod 23 forward and squeeze out the fluid medicine in the syringe 5; the syringe 5 is connected to the hollow guide wire 6. On the one hand, the arc-shaped slot 250 can transmit thrust to the push plate 24 when the second rotating arm 33 rotates (i.e., the arc-shaped slot 250 and the arc-shaped surface 331 slide relative to each other); on the other hand, the arc-shaped slot 250 will not prevent the push tooth 230 from disengaging from the push tooth 240 (i.e., when the lower pressure block 42 presses down, it ensures that the push plate 24 can move downward synchronously).

[0032] Combination Figure 2 , Figure 3 and Figure 10A stop protrusion 34 is provided on the side of the first rotating arm 32. The side wall of the first rotating arm 32 can abut against the side wall of the stop protrusion 34. The stop protrusion 34 is fixedly connected to the outer shell (e.g., by an integral fixed connection). An abutment hole 103 adapted to the first rotating arm 32 is opened on the side wall of the outer shell. The side wall of the first rotating arm 32 can abut against the top of the abutment hole 103. The abutment hole 103 and the stop protrusion 34 are respectively located on both sides of the first rotating arm 32. When the first rotating arm 32 rotates, the stop protrusion 34 is used to limit the extreme position on one side of the first rotating arm 32, and the abutment hole 103 is used to limit the extreme position on the other side of the first rotating arm 32. Each time the user presses the first rotating arm 32, the first rotating arm 32 is rotated from the extreme position on one side to the extreme position on the other side, which can make it have a constant angular variable, thereby controlling the single displacement of the push rod 23 (specifically, the single forward distance) to be a constant value; therefore, each time the user presses the first rotating arm 32 in this manner, an equal amount (equal volume) of fluid agent can flow from the syringe 5 into the hollow guide wire 6, and an equal amount (equal volume) of fluid agent can be injected into the human body (blood vessels) through the hollow guide wire 6.

[0033] The inner cavity sidewall of the housing 1 is provided with an end positioning hole 106 that is adapted to the insertion hole 30; when the first rotating shaft 31 inserts its end into the end positioning hole 106, the position of the first rotating shaft 31 is fixed.

[0034] Reference Figure 5 The distance between the first rotating shaft 31 and the arc-shaped surface 331 can be adjusted to regulate the single displacement (specifically, the single forward distance) of the push plate 24 and the push rod 23, thereby adjusting the single extrusion volume of the fluid agent in the syringe 5 (which is equal to the single injection volume; specifically, the amount of fluid agent injected into the human body through the guide wire; since the drug concentration in the fluid agent is uniform, controlling the volume can control the dosage). Several insertion holes 30 are provided at the connection position of the first rotating arm 32 and the second rotating arm 33. The first rotating shaft 31 can be selectively inserted into any of the insertion holes 30, thus creating different distances between the first rotating shaft 31 and the arc-shaped surface 331.

[0035] Reference Figure 4 The length of a single pushed tooth 230 is L, where L = 1 mm.

[0036] Reference Figure 5The first rotating arm 32 and the second rotating arm 33 are connected by two insertion holes 30, which are arranged one above the other. The inner wall of the housing 1 has two end positioning holes 106, also arranged one above the other. The upper end positioning hole 106 matches the upper insertion hole 30, and the lower end positioning hole 106 matches the lower insertion hole 30. When the middle of the first rotating shaft 31 is inserted into the upper insertion hole 30 and the end of the first rotating shaft 31 is inserted into the upper end positioning hole 106, the first rotating arm 32 can rotate from one extreme position to the other extreme position to push the push rod 23 forward. The single forward distance L of the push rod 23 (at this time, the distance between the upper insertion hole 30 and the arc-shaped surface 331 needs to match the length of a pushed tooth 230; in this state, it is assumed that the tooth spacing of the pushed tooth 230 is 0).

[0037] Reference Figure 2 , Figure 3 and Figure 10 When the middle part of the first rotating shaft 31 is inserted into the lower insertion hole 30 and the end of the first rotating shaft 31 is inserted into the lower end positioning hole 106, the first rotating arm 32 can push the push rod 23 forward by rotating from the extreme position on one side to the extreme position on the other side, and the single forward distance of the push rod 23 is 3L (at this time, the distance between the upper insertion hole 30 and the arc surface 331 needs to match the total length of the three pushed teeth 230; in this state, it is assumed that the tooth spacing of the pushed teeth 230 is 0).

[0038] The distance between the arc-shaped surface 331 and different sockets 30 is adapted to the total length of different numbers of push teeth 230.

[0039] Reference Figure 3 and Figure 10 The drive assembly 3 also includes a second spring plate 35 for driving the first rotating arm 32 to rotate and reset. The top end of the second spring plate 35 is fixedly connected to the bottom end of the first rotating arm 32 (e.g., through an integral fixed connection), and the bottom end of the second spring plate 35 abuts against an abutment protrusion 36, which is fixedly connected to the inner wall of the housing 1 (e.g., through an integral fixed connection). When the user presses the first rotating arm 32 inward, the second spring plate 35 drives the first rotating arm 32 to rotate outward and reset.

[0040] Reference Figure 2 and Figure 3 The push rod 23 is fixedly provided with a forward push plate 233 (e.g., by an integral fixed connection) at the end position of the push rod 23 located in the push groove 101. The forward push plate 233 is used to push the piston rod 53 of the syringe 5 to move.

[0041] Reference Figure 6 and Figure 7The top surface of the push plate 24 is provided with a downward pressing plate 26, the bottom end of which is fixedly connected to the edge of the top surface of the push plate 24 (for example, through an integral fixed connection). The downward pressing plate 26 is located beside the push rod 23. There are two downward pressing plates 26, which are respectively located on both sides of the push rod 23.

[0042] Reference Figure 1 , Figure 6 and Figure 7 The unlocking component 4 includes a third spring 41, a pressing block 42, and a guide plate 43. One end of the third spring 41 is fixedly connected to the housing 1, and the other end is fixedly connected to the pressing block 42 (e.g., through an integrated fixed connection). The bottom surface of the pressing block 42 is provided with the guide plate 43. The guide plate 43 is located above the upper surface of the push rod 23. The bottom surface of the guide plate 43 is pressed against the top surface of the pressing plate 26. When the pressure block 42 (used by the user) is pressed down (after all the fluid in a syringe 5 has been discharged, the user needs to press down the pressure block 42), it can push the pressure plate 26 and the push plate 24 downwards until the push tooth 230 and the push tooth 240 disengage. Then the anti-return function of the push tooth 240 against the push tooth 230 fails, and it is used for the return reset of the push rod 23 (that is, the user can grasp and pull the tail of the push rod 23 away from the syringe 5, so that the forward push plate 233 moves to the end of the push groove 101 away from the syringe 5, and then the user replaces a new syringe 5 containing fluid.

[0043] Reference Figure 3 and Figure 7 When the push plate 24 moves forward, the top surface of the pressure plate 26 slides relative to the bottom surface of the guide plate 43; that is, the pressure block 42 and the guide plate 43 will not hinder the process of the push plate 24 pushing the push rod 23 forward.

[0044] Reference Figure 7 The first spring piece 25 is used to drive the push plate 24 to move upward and reset. After the user pulls the push rod 23 to return to its original position and releases the lower pressure block 42, the first spring piece 25, which was deformed by the force, springs back to its original position, driving the push plate 24 to move upward until the push tooth 240 and the pushed tooth 230 (re-engage). After that, the push tooth 240 can apply a pushing force to the pushed tooth 230 again and achieve the anti-return effect.

[0045] Reference Figure 1 , Figure 6 and Figure 10 The third spring 41 is used to drive the lower pressure block 42 to move upward and reset. After the user pulls the push rod 23 to return to its original position and releases the lower pressure block 42, the third spring 41, which was deformed by the force, springs back to its original position, so that the top of the lower pressure block 42 is reinserted into the top hole 104 on the top surface of the housing 1 and is exposed, so that the user can easily press the lower pressure block 42 downward next time.

[0046] Reference Figure 7 and Figure 8 The push rod 23 includes a horizontal plate 231 and a vertical plate 232 that is perpendicularly connected to the top surface of the horizontal plate 231 (e.g., by an integral fixed connection); the push tooth 230 is provided on the bottom surface of the horizontal plate 231. The horizontal plate 231 and the vertical plate 232 are connected in an inverted T-shape.

[0047] Reference Figure 2 , Figure 8 and Figure 9 The upper clamping member 21 includes a clamping tip 211, a clamping upright plate 212, and a connecting plate 213. One end of the connecting plate 213 is fixedly connected to the middle of the clamping tip 211 (e.g., through an integral fixed connection), and the other end is fixedly connected to the middle of the clamping upright plate 212 (e.g., through an integral fixed connection). The clamping tip 211 and the clamping upright plate 212 respectively abut against the two side walls of the upright plate 232 to avoid unnecessary movement of the push rod 23 by using friction.

[0048] Reference Figure 8 and Figure 9 The outer wall of the clamping tip 211 is provided with a horizontally arranged first side protrusion 2112 (e.g., by an integral fixed connection), and the outer wall of the clamping plate 212 is provided with a horizontally arranged second side protrusion 2122 (e.g., by an integral fixed connection).

[0049] Reference Figure 8 , Figure 9 and Figure 10 The inner cavity sidewall of the housing 1 is provided with two vertical baffles 13, which abut against the two ends of the upper clamping member 21 respectively, to limit the horizontal position of the upper clamping member 21; the inner cavity of the housing 1 is provided with two opposite sidewalls respectively with side insertion holes 14, the first side protrusion 2112 is adapted to be inserted into one of the side insertion holes 14 and the second side protrusion 2122 is adapted to be inserted into the other side insertion hole 14, to limit the height position of the upper clamping member 21; thereby realizing the snap-fit ​​fixation between the upper clamping member 21 and the housing 1.

[0050] Reference Figure 10 The upper and lower sides of the push groove 101 are respectively provided with clamping horizontal plates 11 to limit the top and bottom surfaces of the push rod 23; the inner side wall of the housing 1 is used to limit the two side walls of the push rod 23.

[0051] Reference Figure 7 The bottom surface of the lower pressure block 42 is provided with a relief groove 421 in the middle to accommodate the vertical plate 232. When the lower pressure block 42 moves downward, the relief groove 421 is used to accommodate the vertical plate 232, so as to avoid the bottom surface of the lower pressure block 42 pressing the push rod 23 downward, thereby avoiding the problem of overload damage (e.g., bending) of the push rod 23, and thus improving the service life of the present invention.

[0052] Reference Figure 2 , Figure 6 and Figure 10 A fixing post 44 is fixedly installed at the edge of the third spring 41 away from the lower pressure block 42 (e.g., through an integral fixing connection). The diameter of the fixing post 44 is larger than the thickness of the third spring 41. A C-shaped clamping plate is fitted around the outer periphery of the fixing post 44. The cross-section of the C-shaped clamping plate is C-shaped and its inner diameter is adapted to the outer diameter of the fixing post 44. The two ends of the C-shaped clamping plate abut against the top and bottom surfaces of the third spring 41, respectively. The axial direction of the C-shaped clamping plate is set along the width direction of the push rod 23. The C-shaped clamping plate is fixedly connected to the inner wall of the housing 1 (e.g., through an integral fixing connection), thereby fixing the end of the third spring 41 away from the lower pressure block 42. The opening of the C-shaped clamping plate is set horizontally, so the third spring 41 has a tendency to spring back to a horizontal position.

[0053] Reference Figure 2 and Figure 10 The housing 1 is provided with a propulsion groove 101, and a clamping groove 102 is provided at the end away from the propulsion groove 101. The clamping groove 102 is used to clamp the barrel of the syringe 5; the push rod 23 is used to push the piston rod 53 of the syringe 5 forward.

[0054] Reference Figure 2 and Figure 11 The syringe 5 includes a syringe barrel 51 for containing a fluid drug, a piston 52 disposed within the syringe barrel 51, and a piston rod 53 inserted into the syringe barrel 51 and connected at its end to the piston 52. Clamping fins 511 are fixedly disposed at the edge of the outer surface of the syringe barrel 51 (e.g., through an integral fixed connection). The end of the syringe barrel 51 is inserted into the end of the advance groove 101, and the clamping fins 511 can be adapted to be inserted into the clamping slot 102, thereby temporarily fixing the syringe barrel 51. A forward push plate 233 can abut against the end of the piston rod 53, so that when the push rod 23 advances, the forward push plate 233 can push the piston rod 53 and the piston 52 to move within the syringe barrel 51, thereby squeezing out the fluid drug located between the piston 52 and the piston rod 53. The end of the syringe 5 away from the forward push plate 233 is connected and communicates with one end of a hollow guidewire 6, the other end of which is inserted into a blood vessel in the human body.

[0055] The housing 1 and the clamping fins 511 of the syringe 5 are detachably connected by a rotary snap-fit.

[0056] The propulsion component 2 is partially installed inside the housing 1 and partially exposed (the exposed part is easy for the user to operate manually, such as pulling the push rod 23 to return to the starting position); the drive component 3 is partially installed inside the housing 1 and partially exposed (the exposed part is easy for the user to operate manually, such as pressing the first rotating arm 32 to make it rotate); the unlocking component 4 is partially installed inside the housing 1 and partially exposed (the exposed part is easy for the user to operate manually, such as pressing the lower pressure block 42).

[0057] Reference Figure 2and Figure 10 The end of the push rod 23 away from the syringe 5 is inserted into the syringe, which makes it easy for the user to grasp and pull the push rod 23.

[0058] A method for adjusting injection volume, namely, using a dispensing gun with adjustable single injection volume to inject fluid agents; specifically, it includes adjusting the distance between the arc-shaped surface 331 and the rotation center and / or the single rotation angle of the second rotating arm 33, which can adjust the single injection volume of the fluid agent.

[0059] Reference Figures 12-15 In this embodiment, the single rotation angle of the second rotating arm 33 is adjustable to adjust the single displacement of the push rod 23, thereby adjusting the single extrusion volume of the fluid agent. Furthermore, in this state, the invention only requires one first rotating shaft 31. (Refer to...) Figure 12 and Figure 13 The first cantilever includes an upper arm 321 and a lower arm 322. The top end of the upper arm 321 is connected to the second rotating arm 33, and the bottom end of the upper arm 321 is rotatably connected to the top end of the lower arm 322 via a second rotating shaft 323. The bottom end of the lower arm 322 is connected to the second spring piece 35. The bottom surface of the upper arm 321 has an abutting bottom surface 3211 at the end away from the stop protrusion 34 and an engaging bottom surface 3212 at the end near the stop protrusion 34. The top surface of the lower arm 322 has an abutting top surface 3221 at the end away from the stop protrusion 34 and an engaging top surface 3222 at the end near the stop protrusion 34. When the engaging top surface 3222 and the engaging bottom surface 3212 are disengaged, they form an engaging groove 324. Furthermore, a torsion spring is installed at the position of the first rotating shaft 31 to give the upper arm 321 a tendency to abut against the top end of the abutting hole 103.

[0060] Reference Figure 14 When the lateral thrust used to drive the first rotating arm 32 to rotate inward acts on the side wall of the upper arm 321, the abutting top surface 3221 and the abutting bottom surface 3211 abut against each other, so that the surface of the engagement groove 324 abuts against the stop protrusion 34 (i.e., the stop protrusion 34 can move relatively into the engagement groove 324), thereby giving the upper arm 321 a relatively large single rotation angle, and thus the push rod 23 has a large single displacement and the fluid agent has a large single extrusion volume. During this process, the second spring 35 applies a thrust to the lower arm 322, so that the abutting bottom surface 3211 and the abutting top surface 3221 can fit together.

[0061] Reference Figure 15When the lateral thrust used to drive the first rotating arm 32 to rotate inward acts on the lower arm 322 (the bottom end of its side wall), the lower arm 322 can rotate inward preferentially over the upper arm 321 (under the action of the torsion spring), causing the bottom abutment surface 3211 and the top abutment surface 3221 to disengage, and the top engagement surface 3222 to engage with the bottom engagement surface 3212 (i.e., the engagement groove 324 is closed). This allows the side wall of the lower arm 322 to abut against the stop protrusion 34 (i.e., the stop protrusion 34 cannot move relative to the engagement groove 324), thus giving the upper arm 321 a relatively small single rotation angle. Consequently, the push rod 23 has a small single displacement, and the fluid agent has a small single extrusion volume. Therefore, when the user grasps and presses the upper arm 321 or the lower arm 322 inward, the fluid agent can have different single extrusion volumes (specifically, a two-stage gradient adjustment, rather than stepless adjustment).

[0062] The stop protrusion 34 and the abutment hole 103 are respectively located on both sides of the first rotating arm 32. The abutment bottom surface 3211 and the engagement bottom surface 3212 are respectively located on both sides of the second rotating shaft 323; the abutment top surface 3221 and the engagement top surface 3222 are respectively located on both sides of the second rotating shaft 323. The included angle between the abutment bottom surface 3211 and the engagement bottom surface 3212 is 120 degrees to 170 degrees; the included angle between the abutment top surface 3221 and the engagement top surface 3222 is 120 degrees to 170 degrees. The second spring piece 35 is located below the lower arm 322.

[0063] Reference Figures 12-15 The lateral thrust used to drive the first rotating arm 32 to rotate inward can be selectively applied to the side of the upper arm 321 or the side of the lower arm 322, which can adjust the single rotation angle of the first rotating arm 32, thereby adjusting the single rotation angle of the second rotating arm 33.

[0064] Compared to the solution of removing the housing 1 and changing the position of the first rotating shaft 31, this solution does not require removing the housing 1. Users can freely choose the pressing position of the first rotating arm 32 to control the amount of fluid agent extruded in a single operation, which has greater flexibility and ease of operation.

[0065] Reference Figures 16-18 In this embodiment, the distance between the arc-shaped surface 331 and the rotation center is adjusted by alternating extensions; specifically, two insertion holes 30 need to be provided (at the connection position of the first rotating arm 32 and the second rotating arm 33) (and the two insertion holes 30 are not interconnected, see the reference slot). Figure 5 ), and each of the two insertion holes 30 is connected to a first rotating shaft 31, and the side wall of the housing 1 is provided with two end positioning holes 106 (refer to Figure 10 The end positioning hole 106 here is a blind hole, and the two end positioning holes 106 are respectively adapted to the two insertion holes 30 (refer to...). Figure 10When the side wall of the first rotating arm 32 abuts against the top of the abutment hole 103, the two insertion holes 30 are coaxially arranged and connected with the two end positioning holes 106 respectively. The present invention also includes a lifting assembly 7; the lifting assembly 7 includes a lifting block 71, a spring 72, a first vertical rod 73 and an adjusting sleeve 74; the lifting block 71 is disposed in the lifting cavity 3201 of the first rotating arm 32; the upper and lower ends of the side wall of the lifting block 71 are respectively provided with a first inclined surface 711 and a second inclined surface 712, the normal of the first inclined surface 711 points obliquely upward, and the normal of the second inclined surface 712 points obliquely downward; the end of the first rotating shaft 31 located above is provided with a first inclined end face 3101, the first inclined end face 3101 and the first inclined surface 71 1. Adaptive fit and sliding connection; the lower end of the first rotating shaft 31 is provided with a second inclined end face 3102, which is adapted to fit and slides with the second inclined surface 712; the height difference between the two first rotating shafts 31 is adapted to the vertical height of the first inclined surface 711 / second inclined surface 712; the lifting block 71 can move vertically, so that the two first rotating shafts 31 can selectively insert into the end positioning hole 106 (specifically, when one first rotating shaft 31 is inserted into the end positioning hole 106, the other first rotating shaft 31 retracts into the first rotating arm 32), thereby changing the distance between the arc surface 331 and the rotation center (the rotation center of the arc surface 331 is the first rotating shaft 31 inserted into the end positioning hole 106). The two first rotating shafts 31 are located on the same side of the lifting block 71; both first rotating shafts 31 are horizontally arranged and perpendicular to the inner wall of the housing 1; the two first rotating shafts 31 are arranged in an up-down configuration.

[0066] Reference Figures 16-18 The first cantilever has two guide holes 3202 on its side, arranged in an up-down pattern to accommodate two first rotating shafts 31. The first rotating shafts 31 are adapted to be inserted into the guide holes 3202 and can move along the axis of the guide holes 3202 to insert the end into the end positioning hole 106 or to pull the end out of the end positioning hole 106. A spring 72 groove is provided in the middle of the guide hole 3202, and a spring 72 and a load-bearing fin 311 are provided in the spring 72 groove. Spring 72 is a compression spring; load-bearing fin 311 is fixedly sleeved on the outer periphery of the first rotating shaft 31 (e.g., by an integral fixed connection); one end of spring 72 is pressed against the end face of the spring 72 groove, and the other end is pressed against the load-bearing fin 311. Spring 72 is used to push the load-bearing fin 311, so that the first inclined end face 3101 is pressed against the first inclined surface 711, so that the second inclined end face 3102 is pressed against the second inclined surface 712, and to push the first rotating shaft 31 out of the end positioning hole 106.

[0067] Reference Figures 16-18The load-bearing fin 311 is perpendicularly connected to the first rotating shaft 31. The outer contour of the load-bearing fin 311 is square, and the cross-section of the guide hole 3202 is oriented to match the positive direction of the outer contour of the load-bearing fin 311. This prevents the first rotating shaft 31 from rotating around its own axis, and consequently prevents the first inclined end face 3101 / second inclined end face 3102 from rotating around the axis of the first rotating shaft 31. This also prevents the first inclined end face 3101 from detaching from the first inclined surface 711 and the second inclined end face 3102 from detaching from the second inclined surface 712. The top and bottom surfaces of the lifting cavity 3201 can respectively abut against the top and bottom surfaces of the lifting block 71 to limit the height change of the lifting block 71 (specifically, the top dead point and the bottom dead point), thus preventing the first rotating shaft 31 and the lifting block 71 from detaching and jamming.

[0068] Reference Figure 16 and Figure 17 The first vertical rod 73 is inserted into the first vertical hole of the first rotating arm 32, and the adjusting sleeve 74 is inserted into the second vertical hole of the first rotating arm 32. The top end of the first vertical hole communicates with the lifting cavity 3201, and the bottom end communicates with the second vertical hole; the first vertical hole and the second vertical hole are coaxially arranged. The top end of the first vertical rod 73 is fixedly connected to the lifting block 71 (for example, by an integral fixed connection), and the bottom end is annularly engaged with the adjusting sleeve 74 (the adjusting sleeve 74 can rotate relative to the first vertical rod 73); the top end of the first vertical rod 73 is fixedly connected to the lifting block 71, so neither of them can rotate (the lifting block 71 has a vertically fitting wall 710 at the side wall position relative to the first inclined surface 711, and the vertically fitting wall 710 is vertically slidably connected to the inner side wall of the lifting cavity 3201); the outer side wall of the adjusting sleeve 74 is threadedly connected to the second vertical hole; the adjusting sleeve 74 can rotate to move vertically, thereby (using the first vertical rod 73) driving the lifting block 71 to move vertically. The first rotating arm 32 is a triangular vertical plate structure. The bottom opening of the second vertical hole is located on the bottom surface of the first rotating arm 32, and the regulating sleeve 74 is located above the bottom surface of the first rotating arm 32 (to prevent the bottom end of the regulating sleeve 74 from protruding and jamming the housing 1, that is, to avoid the problem that the first rotating arm 32 cannot rotate inward).

[0069] Reference Figure 16 The regulating sleeve 74 has a structure with an open top and a sealed bottom; a cross-shaped groove is provided at the center of the bottom surface of the regulating sleeve 74. When the first cantilever abuts against the top of the abutment hole 103, a part of the first cantilever (including the bottom opening of the second vertical hole) extends out from the housing 1. At this time, the user can use a screwdriver to hold it in the cross-shaped groove and rotate the regulating sleeve 74 to adjust the height of the lifting block 71, and then select a first rotating shaft 31 to extend from the first rotating arm 32 and insert into the end positioning hole 106.

[0070] Reference Figure 17 and Figure 18The top of the lifting block 71 is fixed with a balance column 713 (e.g., by an integral fixed connection). The balance column 713 is inserted into the balance hole of the first rotating arm 32 (the bottom end of the balance hole is connected to the lifting cavity 3201). As the lifting block 71 rises and falls, the balance column 713 can rise and fall synchronously within the balance hole. The balance column 713 is used to limit the lifting block 71 to avoid the problem of damage caused by uneven load at the connection position between the top of the first vertical rod 73 and the lifting block 71 (e.g., uneven load caused by the tilt of the lifting block 71).

[0071] Compared to the design that splits the first rotating arm 32 into an upper arm 321 and a lower arm 322, this design offers better stability and reliability. Specifically, the threaded adjustment sleeve 74 has a self-locking function, and the cross-shaped groove is concealed inside the first rotating arm 32 (rather than being exposed). The single extrusion volume of the fluid agent can only be adjusted using a tool (such as a screwdriver). This avoids the problem of users accidentally touching the first rotating arm 32, which could cause unnecessary changes in the single extrusion volume of the fluid agent, thereby reducing the occurrence of medical accidents (i.e., pressing the first rotating arm 32 at a certain point in time will only produce a single extrusion volume). On the other hand, it retains a certain degree of ease of operation.

[0072] Reference Figures 19-26 In this embodiment, the distance between the arc-shaped surface 331 and the rotation center is adjusted by sliding the first rotating shaft 31. Specifically, two insertion holes 30 and one first strip hole 301 need to be provided (at the connection position of the first rotating arm 32 and the second rotating arm 33), and the two insertion holes 30 are connected through the first strip hole 301, and the two insertion holes 30 are respectively located at the top and bottom ends of the first strip hole 301 (in conjunction with...). Figure 5 and Figure 19 Furthermore, a first rotating shaft 31 capable of vertical movement is provided within the first strip-shaped hole 301; furthermore, two end positioning holes 106 and a second strip-shaped hole 1001 are provided on one side wall of the housing 1, and the two end positioning holes 106 are connected through the second strip-shaped hole 1001, and the two end positioning holes 106 are respectively located at the top and bottom ends of the second strip-shaped hole 1001 (in conjunction with...). Figure 10 and Figure 20 ), and the end positioning hole 106 here is a through hole; also, the two end positioning holes 106 are respectively adapted to two insertion holes 30 (specifically combined with Figure 2 and Figure 10 When the side wall of the first rotating arm 32 abuts against the top of the abutment hole 103, the two insertion holes 30 are coaxially arranged and connected with the two end positioning holes 106, respectively; that is, the top and bottom ends of the first strip hole 301 and the top and bottom ends of the second strip hole 1001 are respectively adapted, aligned, and connected. (Refer to...) Figure 24The first rotating shaft 31 is inserted into the first strip hole 301 at its middle part and into the second strip hole 1001 at its end (the two ends of the first rotating shaft 31 are respectively inserted into the two second strip holes 1001). (Refer to...) Figure 21 The first rotating shaft 31 is connected to the lower push block 303 via the second vertical rod 302; the top end of the second vertical rod 302 is fixedly connected to the first rotating shaft 31 (the middle of the bottom surface) in a T-shape (e.g., by an integral fixed connection), and the bottom end is fixedly connected to the lower push block 303 (e.g., by an integral fixed connection); the second vertical rod 302 is disposed in the vertical hole inside the first rotating arm 32, and the lower push block 303 is disposed in the side sliding groove 304 on the side wall of the first rotating arm 32 (the side sliding groove 304 is concave); when the lower push block 303 moves downward, it can (via the second vertical rod 302) pull the first rotating shaft 31 (originally located at the top of the first strip hole 301) downward (to the bottom of the first strip hole 301), thereby adjusting the distance between the arc surface 331 and the rotation center (in this embodiment, the rotation center of the arc surface 331 is the axis of the first rotating shaft 31), and thus (secondary gradient) adjust the single extrusion amount of the fluid agent (rather than stepless adjustment). When the first rotating arm 32 abuts against the top of the abutment hole 103, the side sliding groove 304 is located outside the housing 1, thus facilitating the user to touch and press the push block 303. (Refer to...) Figure 21 and Figure 22 When the first rotating shaft 31 is located at the bottom end of the first strip hole 301, the push block 303 is engaged and fixed with the bottom end of the side sliding groove 304 (the bottom end of the side wall of the side sliding groove 304 is integrally fixed with a first side protrusion 3041, and the side wall of the push block 303 is provided with a first side groove that can be adapted and engaged with the first side protrusion 3041), thereby limiting the first rotating shaft 31 to the bottom end of the first strip hole 301, which improves the stability of the present invention and avoids the problem of the first rotating shaft 31 slipping during the rotation of the first rotating arm 32 (if slipping occurs, the first rotating arm 32 will be jammed and fail).

[0073] Reference Figure 23The outer wall of the housing 1 is provided with a sliding plate 1002 (two sliding plates 1002 are provided and are respectively located on both sides of the housing). The sliding plate 1002 can slide along the length direction of the second strip hole 1001. The left and right sides of the sliding plate 1002 are respectively provided with limiting vertical frames 1005. The two limiting vertical frames 1005 are used to guide and limit the sliding plate 1002. The inner side of the limiting vertical frame 1005 is provided with a first vertical groove 10051. The left and right edges of the sliding plate 1002 are respectively slidably locked in the first vertical groove 10051, thereby preventing the sliding plate 1002 from falling off the surface of the housing 1. The sliding plate 1002 has limiting horizontal frames 1004 at both its top and bottom ends, which are connected in a rectangular shape to the limiting vertical frames 1005. The sliding plate 1002 has a rectangular plate structure. An end hole 1003 is provided in the middle of the sliding plate 1002. The end hole 1003 is a round hole with a diameter adapted to the diameter of the first rotating shaft 31. The end of the first rotating shaft 31 is inserted and fixed in the end hole 1003 (e.g., by bolts). The end of the first rotating shaft 31 is perpendicular to the sliding plate 1002, which is vertically positioned. When the sliding plate 1002 moves upward, it can drive the first rotating shaft 31 (originally located at the bottom of the first strip hole 301) upward (to the top of the first strip hole 301), thereby adjusting the distance between the arc-shaped surface 331 and the center of rotation, and thus (secondary gradient) adjusting the single extrusion volume of the fluid agent. (Refer to...) Figure 24 and Figure 25 When the first rotating shaft 31 is located at the top of the first strip hole 301, the top of the sliding plate 1002 and the limiting vertical frame 1005 are engaged and fixed (the inner side wall of the limiting vertical frame 1005 is integrally fixed with a second side protrusion 10021, and the side wall of the sliding plate 1002 is provided with a second side groove 10052 that can be adapted and engaged with the second side protrusion 10021), thereby limiting the first rotating shaft 31 to the top of the first strip hole 301, which improves the stability of the present invention and avoids the problem of the first rotating shaft 31 slipping during the rotation of the first rotating arm 32.

[0074] Reference Figure 22 and Figure 25 Regardless of whether the first rotating shaft 31 is located at the top or bottom of the first strip hole 301, it can be limited by a snap-fit ​​mechanism to prevent unnecessary movement between the first rotating shaft 31 and the first strip hole 301. (Refer to...) Figure 24 and Figure 25 The surface of the first vertical groove 10051 and the side wall of the sliding plate 1002 are overfitted (to increase friction) so that the first rotating shaft 31 is kept stable when it is in the non-end position of the first strip hole 301, avoiding the problem that the second rotating arm 33 will disengage from the push plate 24 due to the rapid movement of the first rotating shaft 31 in the first strip hole 301, thereby improving the stability of the invention.

[0075] Reference Figure 21The side wall of the push block 303 (away from the stop protrusion 34) is provided with a push-down inclined surface 3031. The normal of the push-down inclined surface 3031 points obliquely upward and away from the direction of the first rotating arm 32. The user can press down on the push-down inclined surface 3031 (and the push block 303) with their fingers, thereby driving the first rotating shaft 31 to move downward (overcoming the friction between the first vertical groove 10051 and the sliding plate 1002 in the process). (See reference...) Figure 26 The sliding plate 1002 (away from the first rotating shaft 31) has a downward inclined surface 3031 on its side wall. The normal of the downward inclined surface 3031 points diagonally downward and away from the first rotating shaft 31. The user can push the sliding plate 1002 upward with his / her fingers, thereby driving the first rotating shaft 31 to move upward (in the process of overcoming the friction between the first vertical groove 10051 and the sliding plate 1002).

[0076] Reference Figure 21 and Figure 26 When the first rotating shaft 31 is located at the bottom end of the first strip hole 301, the bottom surface of the push block 303 is in contact with the bottom surface of the side sliding groove 304, and the outer edge of the bottom surface of the push block 303 is located inside the outer edge of the bottom surface of the side sliding groove 304. At this time, the surface of the push block 303 lacks a suitable locking position for fingers (i.e., lacks a force transmission surface). The user can only drive the first rotating shaft 31 to move upward by pushing the sliding plate 1002 upward, thus avoiding the application of upward pushing force to the push block 303. This avoids the problem of the engagement between the push block 303 and the side sliding groove 304 (i.e., the first side locking groove and the first side protrusion 3041) disengaging, thereby avoiding unnecessary movement of the first rotating shaft 31 (i.e., avoiding accidental contact of the push block 303 by the user, achieving foolproof protection; traditional technology usually uses a trigger point to control the raising and lowering of the first rotating shaft 31, which has a large probability of accidental contact).

[0077] Reference Figure 21 and Figure 26When the first strip hole 301 and the second strip hole 1001 are matched (i.e. parallel) and the first rotating shaft 31 is located at the bottom of the first strip hole 301, if the user (in order to raise the first rotating shaft 31) holds the first rotating arm 32 and pushes the push block 303 upward with his thumb, it may not drive the first rotating shaft 31 to rise. Instead, the height of the first rotating shaft 31 will remain unchanged and the first rotating arm 32 will move downward (because the force is mutual). This will cause the second rotating arm 33 to disengage from the arc-shaped slot 250 and become stuck. The only solution is to remove the housing 1 and readjust and reinstall the position of the second rotating arm 33 (and the first rotating arm 32), which will make the operation very cumbersome. In this invention, a downward-pushing inclined surface 3031 is provided on the surface of the downward-pushing block 303, so the user cannot apply an upward pushing force to the downward-pushing block 303. Furthermore, the sliding plate 1002 is used to directly apply an upward pushing force to the first rotating shaft 31 (across the first rotating arm 32). Therefore, the first rotating arm 32 does not need to bear a downward relative force, thus avoiding the problems of the first rotating shaft 31 remaining at a constant height, the first rotating arm 32 moving downward, and the second rotating arm 33 disengaging from the arc-shaped slot 250. This improves the operational stability and reliability of the invention.

[0078] Reference Figure 21 and Figure 26 When the first rotating shaft 31 is located at the top of the first strip hole 301, the top surface of the sliding plate 1002 is in contact with the bottom surface of the (upper) limiting cross frame 1004, and the outer edge of the top surface of the sliding plate 1002 is located inside the outer edge of the bottom surface of the limiting cross frame 1004. At this time, the surface of the sliding plate 1002 lacks a suitable locking position for fingers (i.e., lacks a force transmission surface). The user can only drive the first rotating shaft 31 to move downward by pressing down the push block 303, thus avoiding the application of an upward pushing force to the sliding plate 1002. This avoids the problem of the locking between the sliding plate 1002 and the limiting cross frame 1004 (i.e., the second side slot 10052 and the second side protrusion 10021) disengaging, thereby avoiding unnecessary movement of the first rotating shaft 31 (i.e., avoiding accidental contact of the user with the sliding plate 1002, achieving foolproof protection; traditional technology usually uses a trigger point to control the raising and lowering of the first rotating shaft 31, which has a large probability of accidental contact).

[0079] Reference Figure 21 and Figure 26 Since the second rotating arm 33 abuts against the lower surface of the arc-shaped slot 250, when the user pushes the sliding plate 1002 upward, the pressure between the second rotating arm 33 and the arc-shaped slot 250 will increase, and the two will not separate.

[0080] Reference Figure 21 and Figure 26When the user presses down the pressure block 42 (which is originally located in the side sliding groove 304 but not at the bottom), the friction may cause the first rotating arm 32, the second rotating arm 33, and the first rotating shaft 31 to move downwards simultaneously, resulting in the second rotating arm 33 disengaging from the arc-shaped groove 250. To avoid this problem, a first pin hole 305 is provided at the bottom of the side wall of the first cantilever, and a second pin hole adapted to the first pin hole 305 is provided in the housing 1. When the first rotating arm 32 abuts against the top of the abutment hole 103, the first pin hole 305 and the second pin hole are coaxially arranged and connected (i.e., aligned). The user can then insert the external pin into the first pin hole 305 and the second pin hole before pressing down the pressure block 42, thus preventing the second rotating arm 33 from disengaging from the arc-shaped groove 250. After the lower pressure block 42 moves to engage and fix with the bottom end of the side slider, the user can pull the external pin out of the first pin hole 305 and the second pin hole (i.e. remove it from the present invention), and press the first rotating arm 32 to squeeze out the fluid agent.

[0081] The vertical cross-section of the push block 303 is a right-angled triangle, and the downward inclined surface 3031 is located at the hypotenuse of this right-angled triangle. The vertical cross-section of the sliding plate 1002 is a right-angled triangle, and the downward inclined surface 3031 is located at the hypotenuse of this right-angled triangle.

[0082] When the first rotating arm 32 abuts against the top of the contact hole 103, the lower pressure block 42 can drive the first rotating shaft 31 to move from the top of the first strip hole 301 to the bottom, or the sliding plate 1002 can drive the first rotating shaft 31 to move from the bottom of the first strip hole 301 to the top, thereby adjusting the single extrusion amount of the fluid agent.

[0083] In this embodiment: Firstly, (compared to the solution of splitting the first rotating arm 32 into an upper arm 321 and a lower arm 322) the mechanical structure is more stable and reliable, reducing the probability of jamming; secondly, it solves the problem of accidental operation by the user (i.e., pressing the first rotating arm 32 at a certain time will only produce a single extrusion volume, and there will be no problem of different single extrusion volumes due to accidental operation of the first rotating arm 32); thirdly, (compared to the solution of rotating the regulating sleeve 74 several times to change the height of the first rotating shaft 31) it retains a high degree of operational convenience. The single extrusion volume of the fluid agent can be adjusted simply by pressing down the lower push block 303 and pushing up the sliding plate 1002. The operation steps are simpler and the efficiency is higher.

[0084] In this invention, the first rotating arm 32 drives the second rotating arm 33 to rotate. The arc-shaped surface 331 of the second rotating arm 33 is adapted to engage with the arc-shaped groove 250 of the push plate 24. The push teeth 230 on the bottom surface of the push rod 23 are adapted to engage with the push teeth 240 of the push plate 24. When the second rotating arm 33 rotates at a constant angle, it can push the push rod 23 forward a specific distance, thereby pushing the piston rod 53 of the syringe 5 forward a specific distance to control the single extrusion volume of the fluid agent. This type of structure is simple and easy to operate. The user can conveniently and accurately control the total amount of fluid agent injected within a specific time period by recording the number of times the first cantilever is pressed.

Claims

1. A glue gun with adjustable single injection volume, characterized in that: It includes a quantitative propulsion module, which includes a housing (1), a propulsion component (2), and a drive component (3). The propulsion assembly (2) includes a push rod (23) and a propulsion plate (24), wherein the push tooth (230) of the push rod (23) is adapted to the propulsion tooth (240) of the propulsion plate (24). The drive assembly (3) includes a first rotating shaft (31), a first rotating arm (32), and a second rotating arm (33). The arc-shaped surface (331) at the end of the second rotating arm (33) is adapted to be fitted into the arc-shaped slot (250) of the push plate (24). When the first rotating arm (32) rotates, it can drive the second rotating arm (33) to rotate around the first rotating shaft (31) as the rotation center, so as to push the push plate (24) and the push rod (23) to move forward and squeeze out the fluid agent in the syringe (5).

2. The glue gun with adjustable single injection volume according to claim 1, characterized in that: The distance between the arcuate surface (331) and the center of rotation can be adjusted, and / or the single rotation angle of the second rotating arm (33) can be adjusted to adjust the single displacement of the push rod (23) for adjusting the single injection volume of the fluid agent.

3. The glue gun with adjustable single injection volume according to claim 2, characterized in that: The propulsion assembly (2) further includes an upper clamping member (21), a lower clamping plate (22), and a first spring (25); the upper clamping member (21) abuts against the upper surface of the push rod (23), and the lower clamping plate (22) abuts against the lower surface of the push rod (23); one end of the first spring (25) is connected to the propulsion plate (24), and the other end abuts against the bottom surface of the lower clamping plate (22); the first spring (25) is used to apply torque to the propulsion plate (24), so that the propulsion tooth (240) has the tendency to move upward and mesh with the pushed tooth (230).

4. The glue gun with adjustable single injection volume according to claim 3, characterized in that: The first shrapnel (25) is V-shaped.

5. The glue gun with adjustable single injection volume according to claim 4, characterized in that: The drive assembly (3) further includes a second spring (35) for driving the first rotary arm (32) to rotate and reset.

6. The glue gun with adjustable single injection volume according to claim 5, characterized in that: The quantitative propulsion module also includes an unlocking component (4); the unlocking component (4) includes a third spring (41), a pressing block (42) and a guide plate (43); one end of the third spring (41) is fixedly connected to the housing (1) and the other end is fixedly connected to the pressing block (42); the bottom surface of the pressing block (42) is provided with a guide plate (43). The top surface of the push plate (24) is provided with a pressing plate (26), the top surface of the pressing plate (26) is pressed against the top surface of the guide plate (43) and can slide relative to each other; the pressing plate (26) is located on the side of the push rod (23); when the pressing block (42) presses down, it can push the pressing plate (26) and the push plate (24) to move downward until the pushed tooth (230) and the push tooth (240) disengage, for the return reset of the push rod (23).

7. The glue gun with adjustable single injection volume according to claim 6, characterized in that: The first spring (25) is used to drive the push plate (24) to move upward and reset; the third spring (41) is used to drive the lower pressure block (42) to move upward and reset.

8. The glue gun with adjustable single injection volume according to claim 7, characterized in that: The push rod (23) includes a horizontal plate (231) and a vertical plate (232) that is perpendicularly connected to the top surface of the horizontal plate (231); the push tooth (230) is disposed on the bottom surface of the horizontal plate (231); the upper clamping member (21) includes a clamping tip (211) and a clamping vertical plate (212); the clamping tip (211) and the clamping vertical plate (212) respectively abut against the two side walls of the vertical plate (232).

9. The glue gun with adjustable single injection volume according to claim 8, characterized in that: The first rotating arm (32) and the second rotating arm (33) are connected by a number of insertion holes (30), and the first rotating shaft (31) can be selectively inserted into any of the insertion holes (30).

10. A method for adjusting injection volume, characterized in that: The fluid agent is injected using a dispensing gun with adjustable single injection volume as described in any one of claims 1-9; Adjusting the distance between the arcuate surface (331) and the center of rotation and / or the single rotation angle of the second rotating arm (33) can adjust the single injection volume of the fluid agent.

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