Glue gun and anti-failure mechanism

Abstract

The application discloses a glue gun, comprising: a casing; an output mechanism arranged at the front end of the casing, comprising a container and a push rod assembly movable in the container, the push rod assembly comprising a screw rod and a piston; an execution mechanism driving the push rod assembly to move; the glue gun further comprises an anti-failure mechanism detachably connected to the push rod assembly, the anti-failure mechanism comprising a cleaning tooth, when the anti-failure mechanism moves relative to the screw rod, the cleaning tooth removes residual adhesive on the screw rod.

Description

TECHNICAL FIELD

[0001] The present application relates to a glue tool, in particular to a glue gun and an anti-failure mechanism. BACKGROUND

[0002] The glue gun is generally driven by a manual or electric screw rod rotation, the screw rod is driven to rotate while performing linear movement, so as to push the piston to move and realize the extrusion of the adhesive in the glue container, but the existing glue gun will inevitably have the situation that the adhesive in the glue container is adhered to the screw rod during use, and the adhesive will accumulate and solidify on the surface of the screw rod for a long time, thereby causing the transmission failure of the screw rod and the transmission device, thus causing the overall failure of the glue gun, affecting the user's experience, and on the other hand, the service life of the glue gun is obviously limited. SUMMARY

[0003] The purpose of the present application is to provide a glue gun, which specifically adopts the following technical scheme:

[0004] A glue gun, comprising:

[0005] A housing;

[0006] An output mechanism arranged at the front end of the housing, comprising a container and a push rod assembly movable in the container, the push rod assembly comprising a screw rod and a piston;

[0007] An execution mechanism driving the movement of the push rod assembly;

[0008] The glue gun further comprises an anti-failure mechanism detachably connected to the push rod assembly, the anti-failure mechanism comprising a cleaning tooth, when the anti-failure mechanism moves relative to the screw rod, the cleaning tooth removes the residual adhesive on the screw rod.

[0009] Further, the cleaning tooth can be inserted into the thread tooth bottom for removing the residual glue in the thread tooth bottom.

[0010] Further, the anti-failure mechanism comprises a plurality of cleaning teeth, and the plurality of cleaning teeth are arranged at intervals along the axial direction of the screw rod.

[0011] Further, the anti-failure mechanism comprises a plurality of cleaning teeth, and the plurality of cleaning teeth are arranged at intervals along the axial direction of the screw rod.

[0012] Further, the anti-failure mechanism is provided with a plurality of anti-failure mechanisms respectively adapted to cooperate with screw rods of different diameters.

[0013] Further, the anti-failure mechanism further comprises an auxiliary operation part, wherein the auxiliary operation part comprises a lug or a rib arranged on the outer circumferential surface of the anti-failure mechanism.

[0014] Further, the anti-failure mechanism further comprises a torque amplification hole arranged on the outer circumferential surface of the anti-failure mechanism.

[0015] Further, the anti-failure mechanism is threadedly connected with the piston.

[0016] Further, the glue gun is an electric glue gun, and the actuating mechanism comprises a motor connected with the push rod assembly through a transmission mechanism.

[0017] An anti-failure mechanism suitable for a glue gun, the glue gun comprising a lead screw threadedly connecting a piston and an actuating mechanism.

[0018] The anti-failure mechanism comprises

[0019] Cleaning teeth cooperating with the surface threads of the lead screw, the cleaning teeth being used to clean the residual adhesive on the lead screw when the anti-failure mechanism moves relative to the lead screw.

[0020] Further, the cleaning teeth can be inserted into the thread root to clean the residual glue in the thread root.

[0021] Further, the anti-failure mechanism comprises a plurality of cleaning teeth, the plurality of cleaning teeth being arranged at intervals along the axial direction of the lead screw, or the plurality of cleaning teeth being arranged in the cleaning member at helical intervals.

[0022] Further, the anti-failure mechanism further comprises an auxiliary operation part, wherein the auxiliary operation part comprises a lug or a rib arranged on the outer circumferential surface of the anti-failure mechanism.

[0023] Further, the anti-failure mechanism further comprises a torque amplification hole arranged on the outer circumferential surface of the anti-failure mechanism.

[0024] Further, the anti-failure mechanism is threadedly connected with the piston.

[0025] The present application has the following advantages:

[0026] The glue gun of the present application is provided with an anti-failure mechanism detachably connected therewith, and the adhesive residual on the lead screw can be cleaned by the movement of the anti-failure mechanism relative to the lead screw, thereby avoiding the accumulation and solidification of the adhesive on the surface of the lead screw, and affecting the use experience and service life of the glue gun. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic view of an electric tool of the present application.

[0028] Figure 2 is Figure 1 is a left-right sectional view of the electric tool in

[0029] Figure 3 isFigure 1 Assembly view of the transmission mechanism, clutch mechanism and actuator mechanism in the electric tool in

[0030] Figure 4 Figure 3 Cross-sectional view of the electric tool in along the line A-A in

[0031] Figure 5 Figure 4 Working view of the B part in

[0032] Figure 6 Figure 4 Working view of the B part in another state

[0033] Figure 7 Assembly view of the rotating unit, radial transmission unit and axial transmission unit in the transmission mechanism of the electric tool of the present application

[0034] Figure 8 Assembly view of the first transmission sleeve, second transmission sleeve and ball holder in the transmission mechanism of the electric tool of the present application

[0035] Figure 9 Non-working state view of the anti-lost mechanism and the fixed piston of the electric tool of the present application

[0036] Figure 10 Working state view of the anti-lost mechanism of the electric tool of the present application

[0037] Figure 11 Structure view of the anti-lost mechanism of the electric tool of the present application

[0038] Figure 12 Figure 11 C-C cross-sectional view shown in

[0039] Figure 13 Assembly view of the anti-lost mechanism of the electric tool of the present application

[0040] Figure 14 Assembly view of the anti-lost mechanism of the electric tool of the present application from another perspective

[0041] Figure 15 Structure view of the piston of the electric tool of the present application

[0042] Figure 16 Structure view of the body of the anti-lost mechanism of the present application

[0043] Figure 17 Structure view of the cleaning member of the anti-lost mechanism of the present application

[0044] Explanation of reference signs:

[0045] ​​​​100 - glue gun; 110 - machine shell;

[0046] 200 - output mechanism; 210 - glue container; 220 - push rod assembly; 221 - screw rod; 221a - screw groove; 221b - guide plane; 222 - piston; 222a - internal thread;

[0047] 300 - motor;

[0048] 400 - transmission mechanism;

[0049] 410 - rotating unit; 411 - transmission hole;

[0050] 420 - gear box;

[0051] 430 - radial transmission unit; 431 - transmission tooth; 432 - first transmission sleeve; 433 - second transmission sleeve; 4331 - mounting hole; 434 - stop groove;

[0052] 440 - axial transmission unit;

[0053] 441 - ball holder; 4411 - pin groove; 442 - sliding connection part; 443 - through hole; 444 - ball; 445 - rotation-stopping pin;

[0054] 451 - first non-circular part; 452 - second non-circular part; 453 - third non-circular part;

[0055] 500 - operation handle;

[0056] 600 - anti-failure mechanism;

[0057] 610 - body; 611 - outer body; 612 - inner body; 612a - external thread;

[0058] 620 - cleaning piece; 621 - cleaning tooth;

[0059] 630 - auxiliary operation part;

[0060] 640 - torque amplification hole;

[0061] 650 - nut;

[0062] 710 - trigger unit; 711 - button; 712 - lever; 720 - moving unit; 721 - flange; 730 - connection unit; 740 - spring;

[0063] 800 - battery pack;

[0064] 910 - switch assembly; 920 - control mechanism. DETAILED DESCRIPTION

[0065] As Figures 1-2The image shows a glue gun according to the present invention, specifically an electric glue gun 100, used for handheld glue application. However, it is not limited to an electric glue gun; it could also be a manual glue gun.

[0066] The glue gun 100 includes a housing 110, an output mechanism 200, an actuation mechanism 300, and a transmission mechanism 400.

[0067] See Appendix for details. Figure 1 The output mechanism 200 is located at the front end of the housing 110, and the actuator 300 provides power to the output mechanism 200. In this embodiment of the invention, the actuator 300 is specifically a motor.

[0068] like Figure 2 and Figure 3 As shown, the output mechanism 200 in this embodiment of the invention includes a glue container 210 and a push rod assembly 220 that can move in the glue container 210. The glue container 210 stores adhesive. The transmission mechanism 400 drives the motor 300 and the push rod assembly 220. The piston 222 of the push rod assembly 220 is disposed in the glue container 210 for moving along the axial direction of the glue container 210 to extrude the glue.

[0069] See appendix Figure 2 The push rod assembly 220 includes a lead screw 221 and a piston 222. The lead screw 221 extends in a front-to-back direction, and the piston 222 is fixedly mounted at its front end. The piston 222 moves axially back and forth with the lead screw 221. An operating handle 500 is located at the rear end of the lead screw 221, allowing the user to pull the lead screw back to its original position. The lead screw 221 is connected to a motor 300 via a transmission mechanism 400, and the motor 300 drives the lead screw 221 to move back and forth.

[0070] See appendix Figure 1 and attached Figure 2 The electric glue gun in this embodiment of the invention also includes a battery pack 800, a switch assembly 910, and a control mechanism 920. The battery pack 800 provides power to the motor. The control mechanism 920 controls the operation of the motor 300. The switch assembly 910 in this embodiment is a rotary switch, which is connected to the motor 300 via the control mechanism 920. The rotary switch can control the on / off state of the motor and also adjust the output speed. Its speed adjustment principle is the same as that of existing power tools and will not be elaborated here.

[0071] The transmission method of the glue gun in this embodiment is described below with reference to the accompanying drawings.

[0072] See Figures 3-4The transmission mechanism 400 comprises a rotating unit 410, a gear box 420, a radial transmission unit 430 and an axial transmission unit 440. The screw rod 221 extends in the front-rear direction. The gear box 420 is in transmission connection with the motor 300 and drives the rotating unit 410 to rotate around the screw rod 221 by the motor 300.

[0073] Referring to Figure 4 , the radial transmission unit 430 in the embodiment is driven to rotate by the rotating unit 410. The axial transmission unit 440 is in transmission connection with the radial transmission unit 430 and the screw rod 221 respectively. The axial transmission unit 440 is driven to rotate by the radial transmission unit 430 and drives the screw rod 221 to move in the axial front-rear direction by the rotation of the axial transmission unit 440.

[0074] As shown in Figure 7 and Figure 8 , the rotating unit 410 comprises a driving gear and a sleeve. The driving gear is coaxially arranged at the axial end of the sleeve. In the embodiment, the driving gear and the sleeve are integrally formed. The rotating unit 410 is in transmission connection with the transmission device. Specifically, the driving gear is in meshing connection with the output gear of the gear box. The sleeve is provided with a transmission hole 411.

[0075] As shown in Figures 7-8 , the radial transmission unit 430 comprises a transmission tooth 431 and a first transmission sleeve 432. The transmission tooth 431 is arranged at the radial outer side of the first transmission sleeve 432. The transmission tooth 431 is driven to rotate by the rotating unit 410. Specifically, the transmission tooth 431 is inserted into the transmission hole 411 of the rotating unit 410 and is driven to rotate by the rotating unit 410. The axial transmission unit 440 can be inserted into the first transmission sleeve 432 and is in axial sliding connection with the inner periphery of the first transmission sleeve 432. In the embodiment, the transmission tooth 431 and the first transmission sleeve 432 are integrally formed.

[0076] As shown in Figures 7-8 , the axial transmission unit 440 comprises a ball holder 441 and a ball 444. The axial end of the ball holder 441 is provided with a sliding connection part 442. In the embodiment, the sliding connection part 442 is an end plate integrally formed with the ball holder 441. The sliding connection part 442 at the axial end of the ball holder 441 is in sliding connection with the first transmission sleeve 432. The ball holder 441 is in the shape of a cylinder and is sleeved on the outer periphery of the screw rod 221. A plurality of through holes 443 are arranged on the wall of the ball holder 441 in a regular manner. The through holes 443 allow the ball 444 to pass through. As shown in Figure 5 , when in transmission connection, the ball 444 can pass through the through holes 443 and is in cooperation with the threaded groove 221a on the screw rod 221. The ball 444 is driven to spiral roll around the screw rod 221 by the ball holder 441. The screw rod 221 is driven to move in the axial direction by the rolling of the ball 444.

[0077] AsFigure 4 As shown, in this embodiment, the lead screw 221 has a threadless guide plane 221b extending along the axial direction of the lead screw. The glue gun 100 includes a guide sleeve that mates with the lead screw 221, wherein the guide sleeve has a hole adapted to the cross-section of the lead screw 221, thereby guiding the lead screw 221 to move linearly along its axial direction. The lead screw 221 passes through the guide sleeve, and the guide plane 221b limits the lead screw 221 to only be able to move forward or backward under the rotation of the ball bearings, thereby achieving glue extrusion.

[0078] The transmission mechanism 400 in this embodiment of the invention further includes a torque transmission unit disposed between the radial transmission unit 430 and the axial transmission unit 440 to ensure that the axial transmission unit 440 and the radial transmission unit 430 rotate synchronously.

[0079] The torque transmission unit in this embodiment of the invention includes a first torque transmission unit, wherein the first torque transmission unit is disposed between the first transmission sleeve 432 and the axial transmission member 440 to enable the two to rotate synchronously. Specifically, as shown... Figure 8 As shown, the torque transmission section includes a plurality of first non-circular portions 451 disposed on the inner periphery of the first transmission sleeve 432, and a plurality of second non-circular portions 452 disposed on the outer periphery of the sliding connection portion 442 of the ball cage 441, wherein the second non-circular portions 452 cooperate with the first non-circular portions 451.

[0080] See also Figures 7-8 In this embodiment, the first non-circular portion 451 is a plane on the inner circumference of the first transmission sleeve 432, and the second non-circular portion 452 is a plane or straight edge on the outer circumference of the sliding connection portion 442. There are two of the first non-circular portion 451 and the second non-circular portion 452. The first non-circular portion 451 is suitable for insertion and sleeve on the outer circumference of the second non-circular portion 452. By setting the first non-circular portion 451 and the second non-circular portion 452, the rotation of the ball frame 441 relative to the first transmission sleeve 432 is restricted, thereby ensuring that the two always rotate synchronously. It also avoids the slippage caused by the relative rotation of the radial transmission unit 430 relative to the ball frame 441, which further ensures that the lead screw always moves smoothly, making the glue application operation more stable and uniform.

[0081] like Figures 7-8 As shown, the radial transmission unit 430 in this embodiment of the invention further includes a second transmission sleeve 433, which is sleeved on the cylindrical outer periphery of the ball bearing cage 441. See also Figure 5 The inner circumferential wall of the second transmission sleeve 433 is provided with a retaining groove 434 to allow the ball 444 to enter. During normal operation, the ball 444 is embedded in the ball holder 441, and the ball 444 can roll around the threaded groove 221a on the surface of the lead screw 221. See Appendix Figure 6When the ball cage 441 moves along its axial direction, the balls 444 are pushed by the ball cage 441 into the staying groove 434 of the second transmission sleeve 433. At this time, since the balls 444 are disengaged from the screw rod 221 and the ball cage 441, the screw rod 221 can move axially freely relative to the ball cage 441.

[0082] Referring to the accompanying drawings Figure 7 The torque transmission part in the embodiment further comprises a second torque transmission part arranged between the second transmission sleeve 433 and the axial transmission part 440 to synchronize the rotation of the two, wherein the second torque transmission part comprises a rotation-stopping pin 445, a mounting hole 4331 arranged on the second transmission sleeve 433, and a pin groove 4411 arranged on the ball cage 441, the pin groove 4411 extending along the axial direction of the ball cage 441.

[0083] Specifically, referring to the accompanying drawings Figure 7 - the accompanying drawings Figure 8 The surface of the ball cage 441 is further provided with a pin groove 4411 extending along its axial direction, the surface of the second transmission sleeve 433 is provided with a mounting hole 4331, and a rotation-stopping pin 445 is mounted in the mounting hole 4331, the rotation-stopping pin 445 being axially slidably connected with the pin groove 4411. By arranging the pin groove 4411 and the rotation-stopping pin 445, the relative rotation between the second transmission sleeve 433 and the ball cage 441 is limited, and the axial movement of the ball cage 441 relative to the second transmission sleeve 433 is allowed.

[0084] Referring to the accompanying drawings Figure 5 and the accompanying drawings Figure 8 The outer periphery of the second transmission sleeve 433 in the embodiment of the application is also provided with a third non-circular part 453, wherein the third non-circular part 453 cooperates with the first non-circular part 451 of the inner periphery of the first transmission sleeve 432, thereby limiting the relative rotation between the second transmission sleeve 433 and the first transmission sleeve 432 and realizing the synchronous rotation of the two. In this way, the reliability of the transmission is ensured, and the smooth movement and output of the screw rod are further ensured.

[0085] Of course, as an alternative embodiment, the first non-circular part 451, the second non-circular part 452, and the third non-circular part 453 can also be arranged as other non-planar cooperating structures, such as mutually cooperating protrusions and grooves, or mutually cooperating convex and concave curved surfaces, etc.

[0086] Of course, as an alternative embodiment, the second transmission sleeve 433 can also be integrally formed with the first transmission sleeve 432.

[0087] The screw rod 221 in the embodiment is connected with the ball 444 in the axial transmission unit 440, so as to realize linear axial movement. During the operation of the glue gun, it is difficult to avoid that the adhesive in the glue container adheres to the screw rod, so that the surface of the screw rod 221 is covered by the adhesive, the ball 444 cannot be connected with the screw rod 221, the screw rod 221 cannot move normally, and finally the glue gun cannot perform the glue injection operation.

[0088] Therefore, in order to avoid the failure of the glue gun, the glue gun 100 in the embodiment of the present application further comprises a failure prevention mechanism 600 for removing the residual adhesive on the surface of the screw rod 221, so as to remove the residual adhesive on the surface of the screw rod. Figure 2 、 Figures 11-14

[0089] The failure prevention mechanism 600 is detachably connected with the push rod assembly 220. Specifically, the failure prevention mechanism 600 in the embodiment comprises a body 610 and a cleaning piece 620, the body 610 is detachably connected with the push rod assembly 220, and the cleaning piece 620 is detachably connected with the body 610. The body 610 comprises a non-working state as shown in Figure 9 and a working state as shown in Figure 10 .

[0090] As shown in Figure 12 、 Figure 16 、 Figure 17 , the body 610 and the cleaning piece 620 in the embodiment are both annular members, the cleaning piece 620 is connected to the radially inner side of the body 610, and the cleaning piece 620 is arranged on the radially inner side of the body 610.

[0091] Of course, the body 610 and the cleaning piece 620 of the failure prevention mechanism 600 can also be integrally formed, which is not limited.

[0092] Specifically, as shown in Figure 13 , the body 610 in the embodiment comprises an outer body 611 and an inner body 612 arranged coaxially, wherein the inner body 612 is connected to the radially inner side of the outer body 611, and the inner body 612 and the outer body 611 in the embodiment are integrally formed.

[0093] The body 610 is detachably connected with the piston 222, for example, threaded connection or clamping. In the embodiment, the body 610 is connected with the piston 222 by threaded connection. The cleaning piece 620 is used to remove the residual adhesive on the screw rod 221 when the body 610 moves relative to the screw rod 221.

[0094] Specifically, as shown in Figure 13 and Figure 14 ​As shown, an external thread 612a is provided at one end of the shaft of the inner body 612. Alternatively, external threads 612a can be provided at both ends of the shaft of the inner body 612. Correspondingly, an internal thread 222a, which mates with the external thread 612a, is provided at the end of the shaft of the piston 222 near the transmission mechanism to connect the piston 222 and the body 610. The direction of rotation of the thread on the body 610 is the same as the direction of rotation of the thread on the lead screw 221. Specifically, in this embodiment, the direction of rotation of the external thread 612a on the inner body 612 is the same as the direction of rotation of the thread on the surface of the lead screw 221. This ensures that when the body 610 is screwed onto the piston 222, the anti-failure mechanism 600 rotates along the lead screw 221 towards its axial front end. When the body 610 is screwed off the piston 222, the anti-failure mechanism 600 rotates along the lead screw 211 towards its axial rear end. Continuing to rotate the anti-failure mechanism 600 at this point allows for the removal of residual adhesive.

[0095] Of course, the cleaning component 620 can also be detachably connected to the piston 222. For example, a thread is provided at the axial end of the cleaning component 620 to detachably connect to the piston 222, thereby realizing the detachable connection between the failure prevention mechanism 600 and the piston 222.

[0096] like Figure 12 As shown, in this embodiment, the cleaning component 620 is snapped into the body 610. Specifically, a groove and / or flange are provided on the outer peripheral surface of the cleaning component 620, and a flange and / or groove are provided on the inner peripheral surface of the inner body 612. The relative fixation of the two is achieved by snapping the flange into the groove. Of course, as an alternative embodiment, the cleaning component 620 can also be threaded into the body 610. For example, an external thread is provided on the outer peripheral surface of the cleaning component 620, and an internal thread that mates with the external thread is provided on the inner peripheral surface of the inner body 612.

[0097] like Figure 12 and Figure 17 As shown, the cleaning component 620 includes cleaning teeth 621 that engage with the threads on the surface of the lead screw 221. When the body 610 rotates relative to the lead screw 221, the cleaning teeth 621 rotate synchronously. The rotation of the cleaning teeth 621 relative to the lead screw threads removes residual adhesive adhering to the lead screw threads, thereby preventing the lead screw 221 from failing due to residual adhesive in the lead screw threads during its engagement with the transmission mechanism 400.

[0098] At least the cleaning tooth 621 is a metal part. In this embodiment, the cleaning part 620 is a metal part and the body 610 is a plastic part to reduce the overall weight of the anti-failure mechanism 600.

[0099] Of course, the cleaning teeth 621 and the cleaning member 620 can also be made of hard plastic, in other words, the anti-lost mechanism 600 can be a plastic member integrally formed with the cleaning member 620 and the body 610, or the anti-lost mechanism 600 can also be a metal member integrally formed with the body 610 and the cleaning member 620, which is not limited.

[0100] Specifically, referring to FIG. 1, the cleaning teeth 621 on the cleaning member 620 in the embodiment are adapted to be inserted into the thread root of the lead screw 221 for removing the residual adhesive in the thread interval. Figure 12

[0101] Each cleaning member 620 can be provided with one cleaning tooth 621, or can be provided with a plurality of cleaning teeth 621.

[0102] When a plurality of cleaning teeth 621 are provided, the plurality of cleaning teeth 621 can be arranged at intervals along the axial direction of the lead screw 221. For example, 2 or 3 cleaning teeth 621 can be arranged at intervals along the axial direction of the lead screw 221, and the number of cleaning teeth 621 is not limited to 2 or 3, and any number of cleaning teeth 621 can be selected.

[0103] Optionally, the plurality of cleaning teeth 621 are arranged at intervals on the inner circumferential surface of the cleaning member 620 in a substantially spiral direction.

[0104] By providing the anti-lost mechanism with cleaning teeth, the removal of the residual adhesive between the threads of the lead screw is achieved by rotating the anti-lost mechanism relative to the lead screw. The anti-lost mechanism has a simple structure and can be repeatedly used, has a low cost, and is conducive to improving the service life of the glue gun and the user's experience.

[0105] Optionally, the cleaning member 620 can be configured in the form of an assembly, for example, the cleaning assembly includes a plurality of cleaning members 620 that can be replaced or used together, wherein the cleaning teeth 621 provided on different cleaning members 620 are adapted to different lead screws 221 with different diameters d1, in other words, the cleaning teeth 621 on different cleaning members 620 are suitable for cleaning lead screws of different sizes, wherein the diameter d1 refers to the diameter of the imaginary cylinder tangent to the outer thread root.

[0106] By providing the cleaning assembly with a plurality of cleaning members 620, the adaptability of the cleaning member 620 can be improved, so that it is suitable for lead screws 221 of different specifications. It can be understood that the cleaning member with cleaning teeth suitable for the size of the lead screw 221 can be selected for cleaning the adhesive, and the other unused cleaning assembly can be stored separately.

[0107] As shown in FIG. 2, the cleaning teeth 621 on the cleaning member 620 are adapted to be inserted into the thread root of the lead screw 221 for removing the residual adhesive in the thread interval. Figure 13 and Figure 14 ​As shown, the anti-lost mechanism 600 of the present embodiment further comprises an auxiliary operation part 630, wherein the auxiliary operation part 630 comprises a lug or a rib provided on the outer circumferential surface of the body 610, for the user to hold and apply force when rotating. Of course, as an alternative embodiment, the auxiliary operation part 630 can also comprise a rough surface provided on the outer circumferential surface of the body 610, for increasing the friction when the user rotates the operation, so as to facilitate the user to conveniently rotate the anti-lost mechanism 600.

[0108] Also referring to the accompanying drawings Figure 13 and the accompanying drawings Figure 14 , the anti-lost mechanism 600 of the present embodiment further comprises a torque amplification hole 640 provided on the outer circumferential surface of the body 610. Specifically, the torque amplification hole is a round hole, and the torque amplification hole 640 allows a torque amplification piece to be inserted, wherein the torque amplification piece can be any stick-like object available to the user, such as a stick, a rod, a screwdriver bit, etc., the user inserts the torque amplification piece into the torque amplification hole 640, and rotates the torque amplification piece to easily rotate the anti-lost mechanism 600, so that the user can easily rotate the anti-lost mechanism 600 to clean the glue using a smaller force, thereby avoiding the need to exert force to rotate the anti-lost mechanism to achieve cleaning when the cleaning teeth encounter the glue on the surface of the lead screw.

[0109] The use mode of the anti-lost mechanism 600 of the present embodiment is as follows:

[0110] It can be understood that the anti-lost mechanism 600 of the present embodiment can be threadedly connected to the piston 222 when not in use, thereby forming a relatively fixed whole with the piston 222, and stored in the glue gun.

[0111] When the glue in the glue container 210 is used up, the user can remove the glue container 210, or during the replacement of the glue container 210 (i.e. after removing the used glue container and before installing a new glue container), the anti-lost mechanism 600 can be used to remove the residual adhesive on the lead screw 221, by rotating the anti-lost mechanism 600, the anti-lost mechanism 600 can be rotated off the piston 222 and moved along the lead screw 221 to the axial rear end thereof, the body 610 rotates to drive the cleaning teeth 621 of the cleaning piece 620 to move along the thread groove of the lead screw 221, thereby achieving the glue cleaning operation.

[0112] When the glue cleaning is completed, the user can rotate the anti-lost mechanism 600 in the opposite direction, so as to move the anti-lost mechanism 600 along the lead screw 221 to the axial front end thereof and finally screw onto the piston 222, thereby achieving the exit and storage of the anti-lost mechanism 600.

[0113] The anti-failure mechanism 600 in the embodiment can be detachably connected with the piston by being provided with threads, and can realize the detachment from the piston and the glue removal operation by one-way rotation. Correspondingly, the forward movement on the screw rod and the fixed connection with the piston can be realized by the reverse one-way rotation. The above-mentioned mode is simple and convenient to operate, and the user does not need to use an additional independent part to remove the glue. By detachably connecting the anti-failure mechanism 600 to the piston 222, the redundancy of accessories is avoided, and the loss of accessories is further avoided. On the other hand, the glue removal operation can be easily and conveniently realized without disassembling the main machine, which helps to improve the user experience.

[0114] Of course, as an alternative embodiment, the anti-failure mechanism 600 can also include several alternative auxiliary cleaning pieces, which have the same structure as the cleaning piece 620 and are provided with auxiliary cleaning teeth. The difference is that the auxiliary cleaning teeth cooperate with the thread tooth top of the screw rod 221 to remove the residual glue on the thread tooth top. It can be understood that these auxiliary cleaning pieces are individually stored, and when removing the glue, the cleaning teeth and the cleaning piece that are suitable in size for the screw rod 221 are selected and installed on the screw rod to remove the glue.

[0115] Of course, as an alternative embodiment, the main cleaning teeth and the auxiliary cleaning teeth can also be provided on the cleaning piece. The main cleaning teeth cooperate with the thread tooth bottom, and the auxiliary cleaning teeth cooperate with the thread tooth top.

[0116] Of course, as another alternative embodiment, the cleaning teeth on the cleaning piece 620 can also be V-shaped teeth that are suitable for the thread. Specifically, the tooth top of the cleaning tooth 621 is provided with a V-shaped groove that is suitable for the thread of the screw rod and can be wrapped around the outer surface of the thread. Thus, the removal of the residual adhesive on the tooth top and the tooth bottom can be realized at the same time.

[0117] Of course, when not in use, the anti-failure mechanism 600 can also not be fixed to the piston 222, but can be individually stored as an accessory according to the user's selection, and can be installed on the screw rod 221 for use only when needed. When installing, the fixing nut 650 at the axial end of the piston 222 is first removed, and then the piston 222 is removed. Then, the anti-failure mechanism 600 is sleeved on the screw rod 221 and removes the residual adhesive along the screw rod 221. After the removal is completed, the anti-failure mechanism 600 can be rotated out again, and the piston 222 and the nut 650 can be installed again.

[0118] As an alternative embodiment, the anti-failure mechanism 600 is also applicable to a manual glue gun that uses a screw rod to push the glue, as long as the glue gun that uses a push rod mechanism containing a screw rod is applicable to the anti-failure mechanism of the embodiment, and no limitation is made in this regard.

[0119] Wherein the electric glue gun 100 of the present application further comprises a clutch mechanism, wherein the clutch mechanism is used to drive the ball holder 441 to move along the axial direction of the screw rod 221 to a clutch position, wherein when the ball holder 441 is located at the clutch position, the ball 444 is pushed into the stay groove 434 of the second transmission sleeve 433 and is disengaged from the screw rod 221, at this time the screw rod can be axially freely moved relative to the ball holder.

[0120] Wherein referring to the accompanying drawings Figure 3 - The accompanying drawings Figure 6 , the clutch mechanism comprises a trigger unit 710, a moving unit 720 and a connecting unit 730, wherein the trigger unit 710 is used to drive the moving unit 720 to move to the clutch position, the connecting unit 730 is connected with the ball holder 441, the moving unit 720 is sleeved on the second transmission sleeve 433, and the moving unit 720 drives the connecting unit 730 to drive the ball holder 441 to move axially.

[0121] Specifically, referring to the accompanying drawings Figure 5 and Figure 7 , the moving unit 720 is a cylindrical structure sleeved on the second transmission sleeve 433, the moving unit 720 is provided with a flange 721 protruding radially therefrom for facilitating the triggering of the trigger unit 710, and the connecting unit 730 is a connecting piece clamped on the axial end of the ball holder 441, as shown in Figure 7 , the connecting unit 730 in the embodiment is a U-shaped insert piece clamped on the axial end of the ball holder 441. As shown in Figure 3 and Figure 4 , the trigger unit 710 comprises a trigger button 711 and a lever 712, wherein the middle part of the lever 712 is pivoted to the casing 110, the lower end of the lever 712 is provided with the button 711, and the upper end of the lever 712 is arranged at the axial rear end of the flange 721 (i.e. the right side of Figure 6 ).

[0122] Of course, in order to realize the automatic reset of the clutch mechanism, the present embodiment of the present application is also provided with a spring 740 for driving the ball holder 441 to return to the original position, wherein referring to the accompanying drawings Figure 5 and Figure 7 , the spring 740 is arranged between the sliding connection part 442 of the ball holder 441 and the axial end of the second transmission sleeve 433, and is used to drive the ball holder 441 to return to the initial position.

[0123] The working process of the clutch mechanism of the present embodiment is as follows:

[0124] When working normally, referring to the accompanying drawings Figure 5 :

[0125] The motor 300 drives the rotating unit 410 to rotate and drives the first transmission sleeve 432 to rotate, and the first transmission sleeve 432 drives the ball holder 441 and the second transmission sleeve 433 to rotate synchronously through the first non-circular part 451 on the inner periphery of the first transmission sleeve 432;

[0126] At this time, the ball 444 is embedded in the through hole 443 of the ball holder 441 and is driven by the ball holder 441 to roll around the threaded groove 221a on the outer periphery of the lead screw 221, thereby driving the lead screw 221 to translate along the axial direction, and the glue dispensing operation is realized.

[0127] When the glue container is replaced, referring to the attached Figure 6 :

[0128] When the lead screw 221 advances to the limit position, the lead screw needs to be reset, and a new glue container is reinstalled. At this time, first, the motor is stopped by the knob control, and then the user presses the button 611, and the moving unit 620 is driven by the lever 612 to move the ball holder 441 together to the axial front end through the connecting unit 630. At this time, the ball 444 is pushed into the rest groove 434 of the second transmission sleeve 433 by the ball holder 441 and is separated from the threaded groove 221a on the surface of the lead screw 221.

[0129] Then, the user pulls the operation handle 500 to make the lead screw 221 retreat; of course, the anti-failure mechanism 600 can be rotated to perform the glue cleaning operation on the lead screw 211 before the retreat step is performed.

[0130] After that, the user releases the button 611, the lever 612 is reset by the spring, and the spring 700 applies a force to the ball holder 441 to move the ball holder 441 to the axial rear end to the initial position, and the ball holder 441 drives the moving unit 620 to return to the initial position, thereby realizing the reset of the ball holder 441 and the clutch mechanism.

[0131] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the above examples do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A glue gun, comprising: chassis; The output mechanism, located at the front end of the housing, includes a container and a push rod assembly movable within the container, the push rod assembly including a lead screw and a piston; The actuator drives the push rod assembly to move; Its features are, The glue gun also includes a failure prevention mechanism detachably connected to the push rod assembly. The failure prevention mechanism includes cleaning teeth. When the failure prevention mechanism moves relative to the lead screw, the cleaning teeth remove residual adhesive from the lead screw. When not in use, the failure prevention mechanism is connected to the piston, and detachment from the piston and glue removal operation can be achieved simultaneously through unidirectional rotation.

2. The glue gun according to claim 1, characterized in that, The cleaning tooth can be inserted into the root of the thread to remove residual adhesive from the root of the thread.

3. The glue gun according to claim 1, characterized in that, The failure prevention mechanism includes a plurality of cleaning teeth, which are arranged at intervals along the axial direction of the lead screw.

4. The glue gun according to claim 1, characterized in that, The failure prevention mechanism includes a plurality of cleaning teeth, which are arranged spirally at intervals in the cleaning component.

5. The glue gun according to claim 1, characterized in that, The failure prevention mechanism is provided in multiple parts, each suitable for lead screws of different diameters.

6. The glue gun according to any one of claims 1-5, characterized in that, The failure prevention mechanism also includes an auxiliary operation section, wherein the auxiliary operation section includes lugs or stiffeners provided on the outer peripheral surface of the failure prevention mechanism.

7. The glue gun according to claim 6, characterized in that, The failure prevention mechanism also includes a torque amplification hole located on the outer peripheral surface of the failure prevention mechanism.

8. The glue gun according to claim 1, characterized in that, The failure prevention mechanism is threadedly connected to the piston.

9. The glue gun according to claim 1, 7, or 8, characterized in that, The glue gun is an electric glue gun, and the actuator includes a motor, which is connected to the push rod assembly through a transmission mechanism.

10. A failure prevention mechanism for a glue gun, the glue gun comprising a lead screw connecting a piston and an actuator; Its features are, The failure prevention mechanism includes The cleaning teeth engage with the threads on the lead screw surface. These cleaning teeth are used to remove residual adhesive from the lead screw when the anti-failure mechanism moves relative to the lead screw. When not in use, the anti-failure mechanism is connected to the piston and can be disassembled from the piston and the adhesive removal operation can be performed simultaneously by unidirectional rotation.

11. The anti-failure mechanism according to claim 10, characterized in that, The cleaning tooth can be inserted into the root of the thread to remove residual adhesive from the root of the thread.

12. The anti-failure mechanism according to claim 10, characterized in that, The failure prevention mechanism includes a plurality of cleaning teeth, which are arranged at intervals along the axial direction of the lead screw, or the plurality of cleaning teeth are arranged at intervals in the cleaning component in a spiral manner.

13. The anti-failure mechanism according to any one of claims 10-12, characterized in that, The failure prevention mechanism also includes an auxiliary operation section, wherein the auxiliary operation section includes lugs or stiffeners provided on the outer peripheral surface of the failure prevention mechanism.

14. The anti-failure mechanism according to claim 13, characterized in that, The failure prevention mechanism also includes a torque amplification hole located on the outer peripheral surface of the failure prevention mechanism.

15. The anti-failure mechanism according to claim 11, characterized in that, The failure prevention mechanism is threadedly connected to the piston.

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