Drip-proof structure of hot melt glue gun

Abstract

The utility model discloses an anti-dripping structure of a hot melt glue gun, which drives a glue pushing unit to move through a handle to realize the return of a glue stick and further suck back a molten glue solution, and is simple to operate. When the pressing handle moves in the first direction, glue feeding power is provided for the glue pushing unit, the glue pushing unit drives the glue stick to move from the initial position to the glue feeding position, the glue stick is conveyed into the heating head assembly to be heated and melted, and the glue feeding process is achieved; in the process that the glue pushing unit returns to the initial position from the glue feeding position, the glue stick is not driven to move, so that continuous glue feeding is ensured; when the handle is pushed to move in the second direction, power for returning is provided for the glue pushing unit, the glue pushing unit drives the glue stick to move from the initial position to the returning position, and the glue stick is driven to return. In the process of returning the glue stick, a negative pressure space is generated in the heating head assembly, and a molten glue solution at the glue outlet is sucked into the space under the action of pressure difference, so that the dripping and waste of the glue solution are effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of hot melt glue gun technology, and more specifically, to a drip-proof structure for a hot melt glue gun. Background Technology

[0002] Hot melt glue guns, as a widely used glue application tool, play an important role in various manual, industrial manufacturing, and repair fields. Their core working principle involves heating a solid glue stick to a molten state using a heating device, forming a flowable glue liquid. This liquid is then precisely sprayed onto the surface of the workpiece to be bonded or sealed through a specific nozzle structure. This process not only requires the hot melt glue gun to have efficient heating capabilities and stable temperature control, but also places high demands on its ease of operation, feed accuracy, and safety.

[0003] Existing hot melt glue guns include a housing, a feeding device, a handle, and a nozzle mounted on the front end of the housing. The housing contains an inlet sleeve, and the rear end of the housing has a loading hole. The nozzle is mounted on the front end of the housing, and the hot melt glue stick passes through the loading hole and the inlet sleeve and is inserted into the nozzle. When the handle is pressed, the handle drives the feeding device, propelling the hot melt glue stick axially along the inlet sleeve towards the nozzle's outlet. The melted glue is then discharged from the outlet. After the handle is reset, because the hot melt glue stick remains in the feeding position, some of the melted glue drips from the outlet onto the worktable, causing dirt on the worktable and wasting hot melt glue. Utility Model Content

[0004] To overcome the problem that with existing hot melt glue guns, after the handle is reset, some of the melted glue can still drip from the nozzle onto the workbench, causing dirt on the workbench and wasting hot melt glue, this utility model provides a drip-proof structure for hot melt glue guns.

[0005] The technical solution of this utility model is as follows:

[0006] A drip-proof structure for a hot melt glue gun includes:

[0007] A heating head assembly capable of heating a rubber rod placed therein;

[0008] The glue pushing unit has an open structure and is sleeved on the glue rod. It is used to drive the glue rod to move from the initial position to the glue feeding position and from the initial position to the retraction position. The glue feeding position and the retraction position are located on both sides of the initial position, respectively.

[0009] The handle is linked to the glue-pushing unit and is used to provide the glue-feeding and retraction power to the glue-pushing unit;

[0010] Pressing the handle moves it in the first direction, and the glue pushing unit drives the glue stick to move from the initial position to the glue feeding position;

[0011] Pushing the handle to move in the second direction causes the glue-pushing unit to move the glue stick from the initial position to the retracted position.

[0012] According to the above-described scheme of this utility model, the heating head assembly includes:

[0013] A heat-conducting sleeve, wherein a chamber is provided inside the heat-conducting sleeve, an adhesive inlet is provided at one end of the chamber, and an adhesive outlet is provided at the other end of the chamber;

[0014] A heating element is attached to the heat-conducting sleeve, and the heating element is located on the side of the heat-conducting sleeve near the outlet.

[0015] According to the above-described scheme of this utility model, a stop valve is provided at the end of the heat-conducting sleeve with the glue outlet.

[0016] According to the above-described scheme of this utility model, the diameter of the glue outlet gradually decreases from the chamber to the glue outlet port.

[0017] According to the present invention based on the above scheme, the glue-pushing unit includes a glue-pushing body and a sliding part. The glue-pushing body has an open structure, and the two sliding parts are disposed on both sides of the glue-pushing body, with the opening of the glue-pushing body located in the middle of the two sliding parts.

[0018] According to the present utility model of the above-described scheme, a transmission unit is provided between the handle and the adhesive pushing unit. The transmission unit includes a transmission rod and a push rod. The first end of the transmission rod is connected to the handle, the first end of the push rod is connected to the second end of the transmission rod, and the second end of the push rod is connected to the adhesive pushing body.

[0019] According to the above-described scheme of this utility model, the push rod has an arc-shaped structure.

[0020] According to the present invention based on the above scheme, the handle is further provided with a ring buckle portion, which is used to place fingers to press or push the handle.

[0021] According to the above-described scheme, the present invention further includes a slide rail, with two slide rails respectively disposed on both sides of the adhesive pushing unit. The adhesive pushing unit moves along the slide rail, and the distance between the two slide rails gradually increases from the initial position to the adhesive feeding position. The distance between the two slide rails gradually increases or remains unchanged from the initial position to the retraction position.

[0022] According to the above-described solution, this utility model also includes an elastic element, which is connected to the handle, and the elastic element drives the handle to reset under its own elastic force.

[0023] According to the above-described solution, the beneficial effect of this utility model is that the anti-drip structure of the hot melt glue gun of this utility model can move the glue pushing unit by the handle to realize the feeding and retraction of the glue stick, which is simple to operate.

[0024] When the handle is pressed and moved in the first direction, it provides power to the glue-feeding unit. The glue-feeding unit drives the glue stick from the initial position to the glue-feeding position, and delivers the glue stick into the heating head assembly for heating and melting, thus realizing the glue-feeding process. During the process of the glue-feeding unit returning from the glue-feeding position to the initial position, it does not drive the glue stick to move, so as to ensure continuous glue-feeding.

[0025] When the handle is pushed in the second direction, it provides the retraction force to the glue-pushing unit, which then moves the glue stick from the initial position to the retraction position, causing the glue stick to retract. During the retraction of the glue stick, a negative pressure space is generated inside the heating head assembly. The molten glue at the glue outlet is drawn into this space under the action of the pressure difference, effectively preventing glue dripping and waste. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is an exploded structural diagram of the heating head assembly of this utility model;

[0028] Figure 3 This is a cross-sectional view of the heating head assembly of this utility model;

[0029] Figure 4 This is a schematic diagram of the adhesive pushing unit of this utility model.

[0030] In the figure, the various attached figures are labeled as follows:

[0031] 10. Heating head assembly; 11. Heat-conducting sleeve; 111. Chamber; 112. Glue inlet; 113. Glue outlet; 12. Heating element; 13. Glue stop valve; 20. Glue pushing unit; 21. Glue pushing body; 22. Sliding part; 30. Handle; 31. Ring buckle part; 40. Transmission rod; 50. Push rod; 60. Slide rail; 70. Elastic element; 80. Anti-scalding silicone; 90. Control unit; 91. Battery; 92. LED light; 100. Glue stick. Detailed Implementation

[0032] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification and claims of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices. Terms such as "set up" should be interpreted broadly; for example, it can refer to a fixed connection, a detachable connection, or an integral part; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements or the interaction between two elements, unless otherwise expressly defined. Terms such as "upper," "lower," "left," "right," "front," "rear," and "bottom" indicate orientations or positions based on the orientations or positions shown in the accompanying drawings, and are only for ease of description and should not be construed as limiting the present technical solution.

[0034] It should be noted that existing hot melt glue guns include a housing, a feeding device, a handle, and a gun head mounted on the front end of the housing. The housing contains an inlet sleeve, and the rear end of the housing has a loading hole. The gun head is mounted on the front end of the housing, and the hot melt glue stick passes through the loading hole and the inlet sleeve and is inserted into the gun head. When the handle is pressed, the handle drives the feeding device, propelling the hot melt glue stick axially along the inlet sleeve towards the glue outlet of the gun head. The melted glue is then discharged from the outlet. After the handle is reset, because the hot melt glue stick is still in the feeding position, some of the melted glue can still drip from the outlet onto the worktable, causing dirt on the worktable and wasting hot melt glue.

[0035] like Figures 1-4 As shown, this embodiment provides a drip-proof structure for a hot melt glue gun. The handle 30 drives the glue-pushing unit 20 to move, realizing the feeding and retraction of the glue stick 100, which is simple to operate.

[0036] When the handle 30 moves in the first direction, it provides power to the glue-feeding unit 20. The glue-feeding unit 20 drives the glue rod 100 from the initial position to the glue-feeding position, and delivers the glue rod 100 into the heating head assembly 10 for heating and melting, thus realizing the glue-feeding process. During the process of the glue-feeding unit 20 returning from the glue-feeding position to the initial position, it does not drive the glue rod 100 to move, so as to ensure continuous glue feeding.

[0037] When the push handle 30 moves in the second direction, it provides the retraction power to the glue pushing unit 20. The glue pushing unit 20 drives the glue stick 100 from the initial position to the retraction position, causing the glue stick 100 to retract. During the retraction of the glue stick 100, a negative pressure space is generated inside the heating head assembly 10, meaning the air pressure in this space is lower than the external atmospheric pressure. The molten glue at the glue outlet 113 is drawn into this space under the action of the pressure difference, effectively preventing glue dripping and waste, and ensuring the cleanliness of the worktable. During the process of the glue pushing unit 20 returning from the retraction position to the initial position, it may or may not move the glue stick 100.

[0038] Specifically, the anti-drip structure of the hot melt glue gun includes a heating head assembly 10, a glue-pushing unit 20, and a handle 30. The heating head assembly 10 heats the glue stick 100 placed inside it, causing the glue stick 100 to melt into a flowable glue liquid. The glue-pushing unit 20 has an open structure and is sleeved on the outside of the glue stick 100. It is used to move the glue stick 100 from the initial position to the glue-feeding position and from the initial position to the retraction position. The glue-feeding position and the retraction position are located on both sides of the initial position. The handle 30 is linked to the glue-pushing unit 20 and is used to provide the glue-feeding and retraction power to the glue-pushing unit 20.

[0039] When glue needs to be dispensed, press the handle 30 to move in the first direction, and the glue pushing unit 20 will drive the glue rod 100 from the initial position to the glue dispensing position, and send the glue rod 100 into the heating head assembly 10; when the work is completed, push the handle 30 to move in the second direction, and the glue pushing unit 20 will drive the glue rod 100 from the initial position to the retraction position.

[0040] like Figures 1-3 As shown, in one embodiment, the heating head assembly 10 includes a heat-conducting sleeve 11 and a heating element 12. The heat-conducting sleeve 11 has a chamber 111 inside, with an inlet 112 at one end and an outlet 113 at the other end. The heating element 12 is fitted to the heat-conducting sleeve 11, and is located on the side of the heat-conducting sleeve 11 closest to the outlet 113. This fitted design ensures that when the heating element 12 is working, the heat it generates can be quickly and evenly transferred to the heat-conducting sleeve 11, thereby allowing the glue rod 100 inside the chamber 111 to be heated evenly and quickly. This efficient heat transfer method not only improves the melting speed of the glue rod 100 but also significantly improves the overall working efficiency. Specifically, the hot melt glue gun is equipped with anti-scalding silicone 80 at the glue outlet 113. The anti-scalding silicone 80 has excellent heat insulation properties and can effectively prevent users from being burned by the high temperature of the glue outlet 113 during operation, thus providing users with a safer and more comfortable user experience.

[0041] In this embodiment, the heating element 12 is electrically connected to the control unit 90 inside the hot melt glue gun. The control unit 90 controls the heating element 12 to turn on and off. A temperature sensor is also provided on the surface of the heat-conducting sleeve. The temperature sensor transmits the measured temperature back to the control unit 90, thereby achieving precise adjustment of the heating temperature of the hot melt glue gun. When the heating element 12 receives the instruction from the control unit 90, it begins to heat up and drives the heat-conducting sleeve 11 to heat up, thereby causing the glue stick 100 in the chamber 111 to gradually melt.

[0042] The control unit 90 is wirelessly connected to the battery 91 inside the hot melt glue gun. This wireless connection avoids the inconvenience and safety hazards that may be caused by traditional power cords.

[0043] The hot melt glue gun is also equipped with a display screen, which is electrically connected to the control unit 90 to display information in real time. Users can intuitively understand key information such as the hot melt glue gun's battery level and current temperature through the display screen.

[0044] The hot melt glue gun is equipped with an LED light 92, which shines towards the glue outlet 113 to provide illumination for the user during the use of the hot melt glue gun.

[0045] In one embodiment, a stop valve 13 is provided at the end of the heat-conducting sleeve 11 with the glue outlet 113. The stop valve 13 prevents the hot melt glue from overflowing from the glue outlet 113 and damaging the internal structure of the hot melt glue gun, thus ensuring the safe and stable operation of the hot melt glue gun.

[0046] In one embodiment, the diameter of the adhesive outlet 113 gradually decreases from the chamber 111 to the outlet 113. This helps the adhesive to flow out in a more concentrated and pressurized manner, allowing the adhesive to be applied to the target object more accurately and quickly, thus improving work efficiency and bonding quality.

[0047] like Figure 4 As shown, in one embodiment, the glue-applying unit 20 includes a glue-applying body 21 and a sliding part 22. The glue-applying body 21 has an open structure and is used to clamp the glue stick 100. The clamping force on the glue stick 100 is adjusted by changing the opening on the glue-applying body 21. Two sliding parts 22 are provided on both sides of the glue-applying body 21, and the opening of the glue-applying body 21 is located in the middle of the two sliding parts 22.

[0048] like Figure 1 As shown, in one embodiment, a transmission unit is provided between the handle 30 and the adhesive pushing unit 20. The transmission unit includes a transmission rod 40 and a push rod 50. The first end of the transmission rod 40 is connected to the handle 30, the first end of the push rod 50 is connected to the second end of the transmission rod 40, and the second end of the push rod 50 is connected to the adhesive pushing body 21.

[0049] When the handle 30 is pressed manually, it pulls the transmission rod 40 to move. The transmission rod 40 then drives the push rod 50 forward, which in turn pushes the glue-feeding unit 20 from its initial position to its glue-feeding position. Through the conversion between the transmission rod 40 and the push rod 50, the force of the handle 30's rotation is transformed into a force pushing the glue-feeding position, thereby causing the glue-feeding unit 20 to move along the slide rail 60.

[0050] Manually pushing the handle 30 moves the transmission rod 40, which in turn moves the push rod 50 backward. This push rod 50 then pulls the adhesive applicator 20 from its initial position to its retracted position. Through the conversion between the transmission rod 40 and the push rod 50, the force of the handle 30's rotation is transformed into a pulling force towards the retracted position, thus causing the adhesive applicator 20 to move along the slide rail 60.

[0051] In this embodiment, the push rod 50 has an arc-shaped structure. The arc-shaped push rod 50 can better convert the force of rotating the handle 30 into a force that pushes towards the glue feeding position and a force that pulls towards the retracting position.

[0052] like Figure 1 As shown, in one embodiment, the handle 30 is further provided with a ring buckle 31, and a finger is placed in the ring buckle 31 to press or push the handle 30.

[0053] like Figure 1 As shown, in one embodiment, the anti-drip structure of the hot melt glue gun further includes slides 60. Two slides 60 are respectively disposed on both sides of the glue pushing unit 20. The glue pushing unit 20 moves along the slides 60. The distance between the two slides 60 gradually increases from the initial position to the glue feeding position. During the process of the glue pushing unit 20 moving from the initial position to the glue feeding position, the clamping force on the glue stick 100 gradually decreases. The distance between the two slides 60 gradually increases or remains unchanged from the initial position to the retraction position. During the process of the glue pushing unit 20 moving from the initial position to the retraction position, the clamping force on the glue stick 100 gradually decreases or remains unchanged.

[0054] As the sliding part 22 moves along the slide rail 60 from the initial position to the glue delivery position, the opening on the glue pusher 21 gradually increases, and the clamping force of the glue pusher 20 on the glue rod 100 gradually decreases, preparing for the glue pusher 20 to move independently back to the initial position after glue delivery is completed. Conversely, as the sliding part 22 moves along the slide rail 60 from the glue delivery position to the initial position, the opening on the glue pusher 21 gradually decreases, and the clamping force of the glue pusher 20 on the glue rod 100 gradually increases, preparing for the next glue delivery. The same principle applies when the glue pusher 21 moves between the initial position and the return position.

[0055] like Figure 1As shown, in one embodiment, the anti-drip structure of the hot melt glue gun also includes an elastic element 70, which is connected to the handle 30. The elastic element 70 drives the handle 30 to reset under its own elastic force.

[0056] As the handle 30 drives the glue-pushing unit 20 to move from the initial position to the glue-feeding position, the elastic element 70 gradually stretches and stores energy. After one glue-feeding cycle is completed, the energy stored in the elastic element 70 is released, the elastic element 70 returns to its original state, driving the handle 30 to reset, and then driving the glue-pushing unit 20 to move from the glue-feeding position back to the initial position.

[0057] As the handle 30 drives the adhesive pushing unit 20 to move from the initial position to the retracted position, the elastic element 70 gradually compresses and stores energy. After one retraction, the energy stored in the elastic element 70 is released, the elastic element 70 returns to its original state, driving the handle 30 to reset, and then driving the adhesive pushing unit 20 to move from the retracted position to the initial position.

[0058] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

[0059] The present utility model patent has been described above with reference to the accompanying drawings. Obviously, the implementation of the present utility model patent is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present utility model patent, or the direct application of the inventive concept and technical solution of the present utility model patent to other occasions without modification, are all within the protection scope of the present utility model.

Claims

1. A hot melt glue gun anti-dripping structure, characterized in that, The application relates to a glue feeding device, which comprises the following parts: a heating head assembly capable of heating a glue stick arranged therein; the heating head assembly comprises a heat-conducting sleeve provided with a cavity, a glue inlet arranged at one end of the cavity and a glue outlet arranged at the other end of the cavity, and a glue-stopping valve arranged at the end of the heat-conducting sleeve with the glue outlet; a glue pushing unit in an open structure, which is arranged outside the glue stick and is used for driving the glue stick to move from an initial position to a glue feeding position and from the initial position to a retreat position; the glue feeding position and the retreat position are respectively located on the two sides of the initial position; the glue pushing unit is provided with a slide on each side, and the glue pushing unit moves along the slides; the distance between the two slides gradually increases from the initial position to the glue feeding position, and the distance between the two slides gradually increases or remains unchanged from the initial position to the retreat position; a handle connected with the glue pushing unit and used for providing power for the glue pushing unit to feed glue and retreat; moving the handle to a first direction to drive the glue pushing unit to move the glue stick from the initial position to the glue feeding position; moving the handle to a second direction to drive the glue pushing unit to move the glue stick from the initial position to the retreat position.

2. The anti-dripping structure of the hot melt adhesive gun according to claim 1, characterized in that, The heating head assembly further comprises a heating element which is attached to the heat-conducting sleeve and is located on the side of the heat-conducting sleeve close to the glue outlet.

3. The anti-dripping structure of the hot melt adhesive gun according to claim 2, characterized in that, The diameter of the glue outlet gradually decreases from the cavity to the glue outlet port.

4. The anti-dripping structure of a hot melt adhesive gun according to claim 1, 2 or 3, characterized in that, The glue pushing unit comprises a glue pushing body in an open structure and two sliding parts arranged on the two sides of the glue pushing body, and the opening of the glue pushing body is located between the two sliding parts.

5. The anti-dripping structure of the hot melt adhesive gun according to claim 4, characterized in that, A transmission unit is arranged between the handle and the glue pushing unit, and the transmission unit comprises a transmission rod and a pushing rod; the first end of the transmission rod is connected with the handle, the first end of the pushing rod is connected with the second end of the transmission rod, and the second end of the pushing rod is connected with the glue pushing body.

6. The anti-dripping structure of a hot melt adhesive gun according to claim 5, characterized in that, The pushing rod is in an arc structure.

7. The anti-dripping structure of a hot melt adhesive gun according to claim 1, 5 or 6, characterized in that, The handle is further provided with a ring buckle part used for placing fingers to press or push the handle.

8. The anti-dripping structure of a hot melt adhesive gun according to claim 7, characterized in that, An elastic member is further arranged, which is connected with the handle and drives the handle to reset under the elastic force of the elastic member.

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