Stable anti-overflow glue gun

Abstract

The utility model relates to a stable anti-overflow glue gun which comprises a handle, a trigger assembly, a glue tube bracket and a push rod, the trigger assembly is rotatably connected with the handle, the push rod is connected with the trigger assembly, the glue tube bracket is fixedly arranged at the front end of the handle, the push rod is in sliding fit with the glue tube bracket, and the stable anti-overflow glue gun further comprises an anti-overflow glue assembly which comprises a retaining piece and a rubber ring. The retaining sheet and the rubber ring are arranged in the handle, two sides of the lower end of the retaining sheet are in sliding fit with the handle, an opening is formed in the upper end of the retaining sheet, the bottom of the opening is in contact with the push rod, the rubber ring is arranged between the rubber tube bracket and the retaining sheet, the rubber ring sleeves the push rod, and an inner ring of the rubber ring is matched with the push rod. According to the stable anti-overflow glue gun, the unique returning assembly is designed, it is guaranteed that the push rod can stably and timely return when glue spraying is paused, and therefore the good anti-overflow effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a glue injection tool technical field especially relates to a stable anti -overflow glue gun. BACKGROUND

[0002] The glue gun is a simple and practical tool, its main function is to extrude the glue from the glue pipe by applying pressure. However, due to the existence of certain pressure in the glue pipe, the problem of glue overflow will occur when the glue injection is paused, which will cause the waste of materials and may have adverse effects on subsequent glue injection work, so it is necessary to set back device. The principle of back device is to return the push rod of glue gun a certain distance, so as to release the space in the glue pipe and reduce the pressure, so as to prevent the overflow of glue

[0003] The utility model discloses a "anti -overflow glue glue gun" of CN220658198U Chinese utility model patent publication includes the gun body and push rod, and one end of gun body is provided with trigger and self -locking plate, and the trigger is used for driving push rod to move to the direction close to the gun body, and the push rod is set with reset spring, and the end of reset spring far away from the gun body is connected with self -locking plate, still includes setting on the conical bolt of self -locking plate and with conical bolt screw thread connection conical nut, and the conical bolt is provided with the inner hole of containing push rod passes through. When the glue injection is completed and the trigger is released, the self -locking plate and push rod will move to the direction far away from the gun body under the action of reset spring, and the glue at the glue hole is sucked back to the glue pipe in time, and the overflow problem is prevented.

[0004] However, the reset spring indeed has the effect of returning the push rod, but in actual use, due to the poor flexibility of the spring and the small friction between the spring and the push rod, when the compression amount of the spring is small, the spring will not drive the push rod to return normally after deformation recovery, so it is difficult to ensure that the push rod can return in time and stably. SUMMARY

[0005] In view of the defects in the prior art, the technical problem to be solved by the utility model is to provide a stable anti -overflow glue gun, which can ensure that the push rod can return stably and in time when the glue injection is paused, thereby having good anti -overflow effect.

[0006] To solve the above technical problems, the utility model provides a stable anti -overflow glue gun, which adopts the following technical scheme:

[0007] The stable anti-overflow glue gun comprises a handle, a trigger assembly, a glue pipe bracket and a push rod, the trigger assembly is rotationally connected with the handle, the push rod is connected with the trigger assembly, the glue pipe bracket is fixedly arranged at the front end of the handle, the push rod is in sliding fit with the glue pipe bracket, and the anti-overflow glue assembly comprises a stop sheet and a rubber ring, the stop sheet and the rubber ring are arranged in the handle, the lower ends of the stop sheet are in sliding fit with the handle, the upper end of the stop sheet is provided with an opening, the bottom of the opening is in contact with the push rod, the rubber ring is arranged between the glue pipe bracket and the stop sheet, and the rubber ring is sleeved on the push rod and the inner ring of the rubber ring is in fit with the push rod.

[0008] By designing the anti-overflow glue assembly, the glue gun can effectively prevent the glue from overflowing when the glue gun is paused. Specifically, during operation, the user pulls the trigger assembly, which drives the push rod to move forward, so that the rubber ring is tightly pressed against the rear end of the glue pipe bracket. At this time, the trigger assembly is continuously pulled, and the push rod still moves forward. Because the rubber ring is tightly pressed against the glue pipe bracket, relative sliding occurs between the rubber ring and the push rod. When the trigger assembly is released, the push rod and the trigger assembly have a certain resistance and pull the push rod back. The rubber ring and the push rod retreat together, and when the rubber ring touches the stop sheet, a backward thrust is generated on the stop sheet, but the stop sheet cannot retreat and is lifted up. At this time, the bottom of the opening is in contact with the push rod, and the push rod is stopped from retreating due to the resistance generated by the opening. The resistance is greater than the resistance between the push rod and the trigger assembly, so the trigger assembly will not drive the push rod to return to the original position, thereby achieving the anti-overflow function of the glue gun. Compared with the design of using a spring as a return assembly, the structure has better stability, the friction between the rubber ring and the push rod is greater, and the push rod can be timely returned under the driving of the rubber ring after the trigger assembly is released, thereby meeting the use requirements.

[0009] Further, the axial length of the rubber ring is less than the distance between the stop sheet and the glue pipe bracket. The axial length of the rubber ring can control the distance of the push rod retreating, that is, the strength of the anti-overflow function. The longer the axial length of the rubber ring, the weaker the anti-overflow function, and vice versa. However, if the axial length of the rubber ring is greater than or equal to the distance between the stop sheet and the glue pipe bracket, the glue gun loses the anti-overflow function. Such a design can replace the rubber ring with different axial lengths according to requirements, thereby improving the scene adaptability of the glue gun.

[0010] As preferred, the retreat-stop piece comprises a pressing part and a supporting part, the pressing part is parallel to the rear end of the rubber tube holder, the supporting part is arranged obliquely towards the rubber tube holder, the lower end of the pressing part is fixedly connected with the upper end of the supporting part, the opening is arranged on the pressing part, the two sides of the supporting part are provided with protrusions, the side wall of the handle is provided with a slot, and the protrusions and the slot are in sliding fit. Due to the influence of gravity, the retreat-stop piece is generally placed on the push rod during the extrusion process, the pressing part is slightly inclined downward, the bottom of the opening does not contact the push rod, and the normal advancement of the push rod is not affected. When the push rod is brought back by the trigger assembly, the rubber ring will abut against the pressing part during the retraction process, and the pressing part will be lifted, so that the bottom of the opening contacts the push rod, forms resistance and prevents the push rod from continuing to retract, and the effect of preventing glue overflow without reducing efficiency is achieved. The supporting part is arranged obliquely, which shortens the distance between the retreat-stop piece and the rubber tube holder, because the action of preventing glue overflow does not need to retract too much distance, otherwise the extrusion efficiency will be reduced.

[0011] As preferred, the trigger assembly comprises a trigger and a pusher, the trigger is rotationally connected with the handle, and the pusher is in contact with the bottom of the push rod. During operation, the trigger is pulled, and the trigger drives the pusher to move. In order to ensure the advancement of the push rod, the pusher needs to be in contact with the push rod at all times. In order to achieve this requirement, a torsion spring is arranged between the trigger and the pusher, and the torsion spring generates an upward force on the pusher. When the trigger drives the pusher, a small amount of rotation occurs between them, so that the pusher is always in contact with the push rod. In this way, the push rod can be advanced by pulling the trigger, and the push rod can be retracted by releasing the trigger, so that the movement of the push rod is realized.

[0012] As preferred, the lower end of the push rod is provided with a plurality of evenly spaced teeth, and the lower end edge of the opening and the upper end edge of the pusher are in meshing engagement with the teeth. The design of the meshing teeth has the following advantages for the pusher: on the one hand, the push rod and the pusher can be fixed well, which is more conducive to the cooperation between the pusher and the push rod to realize the above-mentioned movement process; on the other hand, the meshing structure of the teeth is more stable, reduces the risk of failure caused by looseness or misalignment, and is also conducive to the smooth forward movement of the push rod to achieve uniform glue output. For the retreat-stop piece, the presence of the teeth is conducive to the closer contact between the bottom of the opening and the push rod, so that the function of the retreat-stop piece is better realized.

[0013] Preferably, a blade is also included. The blade is fixedly mounted on one side of the trigger and adheres to the inner wall of the handle, with the cutting edge facing forward. A slot is provided on the side wall of the handle where the blade contacts the blade, located in front of the blade. Unused tubular adhesives are sealed and require manual cutting before use. The blade and slot design serve this purpose. The unopened end of the tubular adhesive is inserted into the opening, and pulling the trigger moves the blade forward to complete the opening. This design integrates the opening function into the glue gun and provides a smoother opening, thus facilitating subsequent glue application.

[0014] Preferably, the hose support includes a support member, a first fixing member, and a second fixing member. The support member has an upward-facing opening. The first and second fixing members are fixedly connected to both ends of the support member, respectively. The second fixing member is fixedly connected to a handle. The first fixing member has a fixing groove that extends to its top. The design of the support member, the first fixing member, and the second fixing member provides a stable support for the hose, effectively preventing the hose from tilting or becoming skewed during use. The fixing groove design secures the front end of the hose, thus ensuring the glue application effect.

[0015] Preferably, a top plate is fixedly installed at the front end of the push rod, and the diameter of the top plate is smaller than the diameter of the support. The hose is installed in the hose bracket, and the top plate is in uniform contact with the rear end of the hose, which can apply uniform pressure during the dispensing process, which is conducive to the uniform and even dispensing of the adhesive, thereby ensuring the quality of the dispensing.

[0016] In summary, this stable anti-overflow glue gun features a unique retraction mechanism that ensures the push rod retracts stably and promptly when glue application is paused, thus providing excellent anti-overflow performance. Attached Figure Description

[0017] The utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the anti-reverse sheet of this utility model;

[0021] Handle-1, slot-11, trigger assembly-2, trigger-21, pusher-22, hose bracket-3, support-31, first fixing-32, fixed slot-321, second fixing-33, push rod-4, gear teeth-41, top sheet-42, anti-overflow glue assembly-5, stop sheet-51, convex-511, hole-512, abutting portion-513, support portion-514, rubber ring-52, blade-6. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the utility model is further described in detail below in combination with the drawings and examples.

[0023] As Figure 1 and Figure 2 shown in a kind of stable anti-overflow glue gun, including handle 1, trigger assembly 2, hose bracket 3 and push rod 4, trigger assembly 2 is rotatably connected with handle 1, push rod 4 is connected with trigger assembly 2, hose bracket 3 is fixedly arranged at the front end of handle 1, push rod 4 and hose bracket 3 slidingly cooperate, further include anti-overflow glue assembly 5, anti-overflow glue assembly 5 includes stop sheet 51 and rubber ring 52, stop sheet 51 and rubber ring 52 are arranged in handle 1 interior, the lower end both sides of stop sheet 51 and handle 1 slidingly cooperate, stop sheet 51 upper end is provided with hole 512, the bottom of hole 512 is in contact with push rod 4, rubber ring 52 is arranged between hose bracket 3 and stop sheet 51, rubber ring 52 is sleeved on push rod 4 and the inner ring of rubber ring 52 is matched with push rod 4.

[0024] By designing the anti-glue overflow assembly 5, the glue gun can effectively prevent the glue from overflowing when the glue gun is paused. Specifically, during operation, the user pulls the trigger assembly 2, which drives the push rod 4 to move forward. At the same time, because the bottom of the opening 512 is in contact with the push rod 4, the forward movement of the push rod 4 tends to drive the retainer 51 forward, so that the front end of the retainer 51 tightly presses the rubber ring 52 against the rear end of the glue pipe bracket 3. At this time, continue to pull the trigger assembly 2, and the push rod 4 still moves forward. Because the rubber ring 52 is tightly pressed against the glue pipe bracket 3, relative sliding occurs between the rubber ring 52 and the push rod 4. When the trigger assembly 2 is released, the push rod 4 and the trigger assembly 2 have a certain resistance and pull the push rod 4 back. The rubber ring 52 and the push rod 4 retreat together, and when the rubber ring 52 touches the retainer 51, it will push the retainer 51 backward, but the retainer 51 cannot retreat and is lifted up. At this time, the bottom of the opening 512 is in contact with the push rod 4, which generates resistance to the push rod 4 and stops the push rod 4 from retreating. The resistance is greater than the resistance between the push rod 4 and the trigger assembly 2, so the trigger assembly 2 will not drive the push rod 4 to return to its original position, achieving the anti-glue overflow function of the glue gun. Compared with the design of using a spring as a return assembly, this structure has better stability, and the friction between the rubber ring 52 and the push rod 4 is greater, ensuring that the push rod 4 can retreat in time under the drive of the rubber ring 52 after the trigger assembly 2 is released, meeting the use requirements.

[0025] Further, the axial length of the rubber ring 52 is less than the distance between the retainer 51 and the glue pipe bracket 3. The axial length of the rubber ring 52 can control the distance of the push rod 4 retreating, that is, the strength of the anti-glue overflow function. The longer the axial length of the rubber ring 52, the weaker the anti-glue overflow function, and vice versa. However, if the axial length of the rubber ring 52 is greater than or equal to the distance between the retainer 51 and the glue pipe bracket 3, the glue gun loses the anti-glue overflow function. Such a design can replace the rubber ring 52 with different axial lengths according to needs, improving the scene adaptability of the glue gun.

[0026] As a preferred embodiment, the rubber ring 52 is made of rubber. Figure 3As shown, the retreat stopper 51 includes a pressing portion 513 and a supporting portion 514, the pressing portion 513 is parallel to the rear end of the rubber tube bracket 3, the supporting portion 514 is arranged obliquely towards the rubber tube bracket 3, the lower end of the pressing portion 513 is fixedly connected with the upper end of the supporting portion 514, the opening 512 is arranged on the pressing portion 513, the two sides of the supporting portion 514 are provided with protrusions 511, the side wall of the handle is provided with a slot 11, the protrusions 511 and the slot 11 are in sliding fit. Due to the influence of gravity, the retreat stopper 51 generally rests on the push rod 4 during the extrusion process, the pressing portion 513 is slightly tilted downward, the bottom of the opening 512 does not contact the push rod 4, and the normal advancement of the push rod 4 is not affected. When the push rod 4 is brought back by the trigger assembly 2, the rubber ring 52 will abut against the pressing portion 513 during the retraction process, and the pressing portion 513 will be lifted, so that the bottom of the opening 512 contacts the push rod 4, forms resistance and prevents the push rod 4 from continuing to retract, and achieves the effect of preventing overflow of glue without reducing efficiency. The supporting portion 514 is arranged obliquely, which shortens the distance between the retreat stopper 51 and the rubber tube bracket 3, because the anti-glue overflow action does not need to retract too much distance, otherwise it will cause the extrusion efficiency to decrease.

[0027] As preferred, as shown in the drawings, Figure 2 As shown, the trigger assembly 2 includes a trigger 21 and a pusher 22, the trigger 21 is rotationally connected with the handle 1, the pusher 22 is in contact with the bottom of the push rod 4, and the bottom of the pusher 22 is rotationally connected with the top of the trigger 21. During operation, cock the trigger 21, the trigger 21 drives the pusher 22 to move, in order to ensure the advancement of the push rod 4, the pusher 22 needs to be in contact with the push rod 4 at all times. In order to achieve this requirement, a torsion spring is used to connect the trigger 21 and the pusher 22, the torsion spring will generate an upward force on the pusher 22, which will cause a slight rotation between the trigger 21 and the pusher 22 when the trigger 21 drives the pusher 22, thereby ensuring that the pusher 22 always abuts against the push rod 4, so that the pusher 22 can push the push rod 4 forward when the trigger 21 is cocked, and the push rod 4 can be retracted when the trigger 21 is released, thereby realizing the movement of the push rod 4.

[0028] As preferred, the lower end of the push rod 4 is provided with a plurality of evenly spaced teeth 41, the lower end edge of the opening 512 and the upper end edge of the pusher 22 are all engaged with the teeth 41. The design of engaging with the teeth 41 is beneficial to the pusher 22 in that, on the one hand, the push rod 4 and the pusher 22 can achieve good fixing effect, which is more conducive to the cooperation of the pusher 22 and the push rod 4 to realize the above-mentioned movement process, on the other hand, the engaging structure of the teeth 41 is more stable, which reduces the risk of failure caused by looseness or misalignment, and is also beneficial to the smooth forward movement of the push rod 4 to achieve uniform glue output. For the retreat stopper 51, the presence of the teeth 41 is beneficial to the closer contact between the bottom of the opening 512 and the push rod 4, thereby better realizing the function of the retreat stopper 51.

[0029] As preferred, the knife 6 is fixedly installed on one side of the trigger 21 and attached to the inner wall of the handle 1, the cutting edge of the knife 6 is arranged forwardly, and a slot hole is arranged on the side wall of the handle 1 attached to the knife 6, the slot hole is located in front of the knife 6. Various tubular glues that are not used are sealed, and need to be cut by manual operation before use. The knife 6 and the slot hole are designed to cut the opening. The front end of the unopened tubular glue is inserted into the opening, the trigger 21 is pulled, and the knife 6 can move forward to complete the opening work. This design integrates the opening function on the glue gun, and can process the opening more smoothly, thereby facilitating the subsequent glue injection work.

[0030] As preferred, the glue pipe bracket 3 comprises a supporting piece 31, a first fixing piece 32 and a second fixing piece 33, the supporting piece 31 is arranged upwardly, the first fixing piece 32 and the second fixing piece 33 are fixedly connected with two ends of the supporting piece 31 respectively, the second fixing piece 33 is fixedly connected with the handle 1, and the first fixing piece 32 is provided with a fixing groove 321 extending to the top of the first fixing piece 32. The design of the supporting piece 31, the first fixing piece 32 and the second fixing piece 33 provides a stable support for the glue pipe, which can effectively prevent the glue pipe from being skewed due to uneven force in the use process, and the design of the fixing groove 321 can tightly clamp the front end of the glue pipe, thereby ensuring the glue injection effect.

[0031] As preferred, the front end of the push rod 4 is fixedly installed with a top piece 42, and the diameter of the top piece 42 is smaller than that of the supporting piece 31. The glue pipe is installed in the glue pipe bracket 3, the top piece 42 is in uniform contact with the rear end of the glue pipe, which can apply uniform pressure during glue injection, thereby facilitating the uniform injection of the glue, and ensuring the quality of the glue injection.

[0032] In summary, the stable anti-glue overflow gun is designed with a unique return assembly, which can ensure that the push rod can stably and timely return when the glue injection is paused, thereby having a good anti-glue overflow effect.

[0033] In summary, the above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stable anti-overflow glue gun, comprising a handle (1), a trigger assembly (2), a glue tube holder (3), and a push rod (4), wherein the trigger assembly (2) is rotatably connected to the handle (1), the push rod (4) is connected to the trigger assembly (2), the glue tube holder (3) is fixedly disposed at the front end of the handle (1), and the push rod (4) is slidably engaged with the glue tube holder (3), characterized in that: It also includes an anti-overflow adhesive assembly (5), which includes a backstop plate (51) and a rubber ring (52). The backstop plate (51) and the rubber ring (52) are disposed inside the handle (1). The lower ends of the backstop plate (51) are slidably engaged with the handle (1). An opening (512) is provided at the upper end of the backstop plate (51). The bottom of the opening (512) is in contact with the push rod (4). The rubber ring (52) is disposed between the hose bracket (3) and the backstop plate (51). The rubber ring (52) is sleeved on the push rod (4) and the inner ring of the rubber ring (52) is engaged with the push rod (4).

2. The stable anti-overflow glue gun according to claim 1, characterized in that: The axial length of the rubber ring (52) is less than the distance between the anti-reverse plate (51) and the hose bracket (3).

3. The stable anti-overflow glue gun according to claim 2, characterized in that: The anti-reverse plate (51) includes a pressing part (513) and a supporting part (514). The pressing part (513) is parallel to the rear end of the hose bracket (3). The supporting part (514) is inclined toward the hose bracket (3). The lower end of the pressing part (513) is fixedly connected to the upper end of the supporting part (514). The opening (512) is provided on the pressing part (513). The two sides of the supporting part (514) are provided with protrusions (511). The side wall of the handle (1) is provided with a groove (11). The protrusions (511) and the groove (11) are slidably engaged.

4. The stable anti-overflow glue gun according to claim 2, characterized in that: The trigger assembly (2) includes a trigger (21) and a pusher (22). The trigger (21) is rotatably connected to the handle (1). The pusher (22) is in contact with the bottom of the push rod (4). The bottom of the pusher (22) is rotatably connected to the top of the trigger (21).

5. The stable anti-overflow glue gun according to claim 4, characterized in that: The lower end of the push rod (4) is provided with a plurality of evenly spaced teeth (41), and the lower edge of the opening (512) and the upper edge of the pusher (22) are engaged with the teeth (41).

6. The stable anti-overflow glue gun according to claim 5, characterized in that: It also includes a blade (6), which is fixedly installed on one side of the trigger (21) and attached to the inner wall of the handle (1). The blade (6) is positioned with its cutting edge facing forward. A slot (12) is provided on the side wall of the handle (1) that is attached to the blade (6). The slot (12) is located in front of the blade (6).

7. The stable anti-overflow glue gun according to claim 1, characterized in that: The hose bracket (3) includes a support (31), a first fixing member (32), and a second fixing member (33). The support (31) is open and facing upward. The first fixing member (32) and the second fixing member (33) are fixedly connected to both ends of the support (31), respectively. The second fixing member (33) is fixedly connected to the handle (1). The first fixing member (32) is provided with a fixing groove (321), which extends to the top of the first fixing member (32).

8. The stable anti-overflow glue gun according to claim 7, characterized in that: The push rod (4) has a top plate (42) fixedly installed at its front end. The diameter of the top plate (42) is smaller than the diameter of the support (31).

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