CN213914647U

CN213914647U - Hot melt glue gun

Info

Publication number: CN213914647U
Application number: CN202022753143.3U
Authority: CN
Inventors: 刘力丹; 陈雄波
Original assignee: Shanghai Qiwai Culture Technology Co ltd
Current assignee: Shanghai Qiwai Culture Technology Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-08-10
Anticipated expiration: 2030-11-24

Abstract

The utility model discloses a hot melt adhesive rifle. This hot melt adhesive rifle is including gluing the rifle casing, glue rifle casing one end and seted up the mouth of advancing of supplying to glue the stick and getting into, glue the inside heating head subassembly that is equipped with of rifle casing, the heating head subassembly is including heating head and heating plate, the heating head includes heating pipe and play hose, the heating pipe is used for the transmission the heat of heating plate glues the stick with the heating, go out the rubber tube and connect the front end of heating pipe, it is used for supplying to go out the rubber tube glue solution after the stick melts in the heating pipe is followed the rubber tube flows out, the heating plate cover is located go out on the rubber tube and press close to the front end terminal surface of heating pipe. When the hot melt adhesive gun works, the heating sheet heats the front end face of the adhesive stick accommodated in the heating pipe and conducts heat to other parts of the heating pipe, so that the subsequent parts of the adhesive stick are heated, and the heating time is shortened.

Description

Hot melt glue gun

Technical Field

The utility model relates to a hot melt adhesive rifle technical field specifically is a hot melt adhesive rifle.

Background

The hot melt glue gun is a manual electric hot melt glue squeezing tool commonly used in household, personal DIY and factory production, a hot melt glue rod in the glue gun is heated by electrifying a heating sheet to heat, glue is melted, and the melted glue is coated on a gluing part to realize adhesion.

The existing hot melt glue gun is inconvenient to use because the needed heating time is long and the quick glue discharging of the hot melt glue gun is influenced, and the hot melt glue gun needs to be preheated for a period of time in advance, generally 2-3 minutes. Therefore, there is a need for an improved hot melt glue gun to shorten the preheating time and make the use more convenient and faster.

Disclosure of Invention

The utility model provides a hot melt adhesive rifle to it is longer to solve the required preheating time of hot melt adhesive rifle among the prior art, influences the technical problem that the hot melt adhesive rifle goes out to glue fast.

The utility model provides a hot melt adhesive rifle, glue rifle casing one end and seted up the mouth of advancing of supplying to glue stick entering, glue the inside heating head subassembly that is equipped with of rifle casing, the heating head subassembly is including heating head and heating plate, the heating head includes heating pipe and play glue pipe, the heating pipe is used for the transmission the heat of heating plate glues the stick with the heating, go out the rubber tube and connect the front end of heating pipe, it is used for supplying to go out the glue pipe and follow the glue solution that glues stick after melting in the heating pipe play glue pipe flows, the heating plate cover is located go out on the glue pipe and press close to the front end terminal surface of heating pipe.

Preferably, the heating head assembly further comprises a pressing plate, wherein the pressing plate is sleeved on the rubber outlet pipe and clamps the heating sheet between the pressing plate and the front end face of the heating pipe.

Preferably, the heating head is a metal heating head, and the heating plate is an MCH heating plate.

Preferably, the hot melt glue gun further comprises a glue guiding pipe, a first spring and a glue returning ring, wherein the front end of the glue guiding pipe is connected with the rear end of the heating pipe, a bulge is arranged on the glue guiding pipe, the front end of the glue returning ring is movably sleeved at the rear end of the glue guiding pipe, the first spring is sleeved at the rear end of the glue guiding pipe, two ends of the first spring are respectively abutted against the bulge of the glue guiding pipe and the glue returning ring, the glue returning ring and the glue guiding pipe are used for a glue rod to penetrate through and enter the heating pipe, and the glue returning ring is in interference fit with the glue rod;

when the glue stick moves towards the heating head component, the glue stick drives the glue returning ring to move towards the heating head component and compress the first spring; when the acting force of the driving rubber stick moving towards the heating head assembly disappears, the first spring resets and drives the rubber return ring to move back to the heating head assembly, and the rubber return ring drives the rubber stick to move back to the heating head assembly.

Preferably, the protrusion on the rubber guide tube is an annular protrusion, an inner shoulder is arranged at the front end of the rubber return ring, and one end of the first spring abuts against the inner shoulder of the rubber return ring.

Preferably, at least one non-return part is arranged in the rubber guide tube, and the non-return part is used for clamping the rubber rod to prevent the rubber liquid melted by the rubber rod in the heating tube from flowing to the rear end of the rubber guide tube.

Preferably, the rubber guide pipe further comprises a second spring, and the second spring is sleeved outside the rubber guide pipe to fix the rubber guide pipe.

Preferably, the hot melt adhesive gun further comprises a glue pushing assembly for pushing the glue stick to move towards the heating head assembly, the glue pushing assembly comprises: the trigger is rotatably arranged in the glue gun shell, the lower portion, pressed by a hand, of the trigger extends to the outer side of the glue gun shell, the upper portion, located in the glue gun shell, of the trigger is connected with one end of the trigger tension spring, the other end of the trigger tension spring is connected with the glue gun shell, the upper portion of the trigger is hinged with one end of the connecting rod, the other end of the connecting rod is hinged with one end of the trigger, the other end of the trigger is hinged with the sliding block, and the sliding block is movably arranged in the glue gun shell along the moving direction of the glue stick;

when the trigger is pressed, the upper part of the trigger rotates in the positive direction, the trigger tension spring is stretched, the upper part of the trigger drives the buckling claw to rotate through the connecting rod and drive the sliding block to move towards the heating head assembly, and the buckling claw buckles the rubber rod after rotating and drives the rubber rod to move towards the heating head assembly;

when the trigger is loosened, the trigger tension spring resets and drives the upper portion of the trigger to rotate reversely, the upper portion of the trigger drives the buckling claw to rotate reversely through the connecting rod and drive the sliding block to move back to the heating head assembly, and the rubber rod is loosened after the buckling claw rotates reversely.

Preferably, glue the inside PCB subassembly that is equipped with of rifle casing, the PCB subassembly is used for control the heating of heating element subassembly, the hot melt glue rifle still includes trigger switch, trigger switch sets up glue on the rifle casing and be close to the trigger presses during the trigger, the trigger contact trigger switch, trigger switch is used for the trigger contact to during the trigger switch PCB subassembly signals.

Preferably, the PCB subassembly includes PCB board and intelligent chip, be equipped with button and leaded light post on gluing the rifle casing, the PCB board be equipped with the button that the button corresponds and with the pilot lamp that the leaded light post corresponds, intelligent chip is used for controlling the heating of heating element subassembly.

Preferably, the glue gun shell comprises an inner shell, an outer shell and a bottom cover, the inner shell is arranged in the outer shell, the inner shell comprises a left inner shell and a right inner shell, the left inner shell and the right inner shell are connected in a folding mode in the direction perpendicular to the moving direction of the glue stick, the outer shell comprises a front outer shell and a rear outer shell, the front outer shell and the rear outer shell are arranged in a folding mode in the moving direction of the glue stick, the front outer shell and the rear outer shell are connected with the inner shell through fasteners respectively, a handle for being held by a hand is formed on the outer shell, and the bottom cover is fixedly connected with the bottom of the handle.

Preferably, the glue gun housing further comprises a base, and the base is sleeved on the bottom cover to support the hot melt glue gun to stand.

Preferably, the base is a silica gel base.

Preferably, the hot melt adhesive gun further comprises a tail cover, the tail cover is buckled at one end of the glue inlet of the shell, the glue stick penetrates through the tail cover and enters the glue inlet, and the tail cover is in interference fit with the glue stick and used for clamping the glue stick in the glue stick filling process.

Preferably, the hot melt glue gun still includes silica gel cover and radiation shield, silica gel cover and radiation shield are connected respectively glue the rifle casing and be located glue the rifle casing's the one end of neighbouring heating head subassembly, radiation shield silicon and glue cover in proper order and establish outside the heating head subassembly, the one end of the play rubber tube of heating head subassembly is passed silica gel cover and radiation shield expose.

Preferably, the hot melt adhesive gun further comprises a protective cover, the protective cover is detachably covered outside the silica gel sleeve, and one exposed end of the rubber outlet pipe is located in the protective cover.

Compared with the prior art, the beneficial effects of the utility model include at least:

the utility model discloses an among the hot melt adhesive rifle, the head that generates heat includes heating pipe and play glue tube, and the heating plate cover is located on the play glue tube and is pressed close to the front end terminal surface of heating pipe, and hot melt adhesive rifle during operation, the heating plate heats the holding at the front end terminal surface of the gluey stick in the heating tube to other positions of heating pipe are given in the heat conduction, thereby heat the follow-up position of gluing the stick, shorten heat time.

Drawings

Fig. 1 is a perspective view of a hot melt adhesive gun according to an embodiment of the present invention.

Fig. 2 is an exploded schematic view of the glue gun housing according to the embodiment of the present invention.

Fig. 3 is a cross-sectional view of a hot melt glue gun in an embodiment of the present invention.

Fig. 4 is an enlarged view of a portion S in fig. 3.

Fig. 5 is an exploded view of a heater assembly according to an embodiment of the present invention.

Fig. 6 is a perspective view of a heating head assembly according to an embodiment of the present invention.

Fig. 7 is an exploded view of the heating head assembly, the rubber guide tube, the first spring, the second spring and the rubber pushing assembly according to the embodiment of the present invention.

In the figure: 1. a hot melt glue gun; 2. glue stick; 10. a glue gun housing; 10a, a glue inlet; 10b, a key; 10c, a light guide column; 11. a left inner shell; 12. a right inner shell; 13. a front housing; 14. a rear housing; 15. a bottom cover; 16. a base; 20. a heater head assembly; 21. a heating head; 211. heating a tube; 212. discharging the rubber tube; 22. a heating plate; 23. pressing a plate; 30. a rubber guide tube; 31. a first spring; 32. a second spring; 33. returning the glue ring; 40. a trigger; 41. a connecting rod; 42. buckling claws; 43. a slider; 44. a trigger tension spring; 50. a PCB board; 51. a button; 52. an indicator light; 60. a trigger switch; 70. a tail cover; 71. a silica gel sleeve; 72. a heat insulating sleeve; 73. a protective cover.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

Before describing in detail, it is noted that the directional terms "front", "rear", "left", "right" in the present disclosure are used with reference to the accompanying drawings, and are not intended to limit the scope of the present disclosure.

Referring to fig. 1 to 7, the utility model provides a hot melt adhesive gun 1, this hot melt adhesive gun 1 includes glues rifle casing 10, further includes heating element subassembly 20 and pushes away gluey subassembly, can also include the PCB subassembly.

Glue rifle casing 10 one end and offer the mouth 10a that advances that supplies to glue stick 2 and get into, in a specific embodiment, glue rifle casing 10 and include the inner shell, shell and bottom 15, the inner shell sets up in the shell, the inner shell includes left inner shell 11 and right inner shell 12, the shell includes preceding shell 13 and back shell 14, left side inner shell 11 and right inner shell 12 are to closing the connection on the 2 moving direction of perpendicular to glue stick, preceding shell 13 and back shell 14 are respectively through fastener (not shown) connection inner shell, the shell is formed with the handle that supplies the hand to grip, the bottom of bottom 15 fixed connection handle. Specifically, left inner shell 11 and right inner shell 12 can be through screwed connection, and preceding shell 13, back shell 14 can be connected with left inner shell 11, right inner shell 12 through the screw that sets up at the tip respectively, and through setting up interior outer shell structure, preceding shell 13 can be connected through the thread slipping with back shell 14 for glue rifle casing 10 surface and realize no screw design, the structure is more pleasing to the eye and succinct, has increased the steadiness and the intensity of gluing rifle casing 10.

The glue gun housing 10 is preferably further provided with a base 16, and the base 16 can be fixedly sleeved on the bottom cover 15 to support the hot melt glue gun 1 to stand. Specifically, base 16 can be silica gel spare, and base 16 has great supporting area, and hot melt adhesive gun 1 can stand upright on work platform through base 16, through setting up base 16, has increased the stability when hot melt adhesive gun 1 stands upright, is convenient for take of hot melt adhesive gun 1.

Glue gun shell 10 inside and be equipped with heating head subassembly 20, heating head subassembly 20 includes heating head 21 and heating plate 22, heating head 21 includes heating pipe 211 and play hose 212, heating pipe 211 can transmit heating plate 22's heat and glue stick 2 with the heating, go out the front end that heating pipe 211 is connected to hose 212, specifically, glue solution that glue stick 2 after melting in heating pipe 211 can be supplied to glue out hose 212 flows from a glue pipe 212, heating plate 22 cover is located on a glue pipe 212 and is pressed close to the front end terminal surface of heating pipe 211. In a specific embodiment, the heating head 21 may be a metal heating head 21, for example, a copper heating head 21, the heating sheet 22 may be an MCH heating sheet 22, in the process that the glue stick 2 advances forward in the heating pipe 211, the end surface of the front end of the glue stick 2 abuts against one side of the heating pipe 211 adjacent to the glue outlet pipe 212, the heating sheet 22 heats the end surface of the front end of the glue stick 2 accommodated in the heating pipe 211 and conducts the heat to other parts of the heating pipe 211, so as to heat the subsequent parts of the glue stick 2, the heating time is shortened from the existing 2-3 minutes to 30 seconds through testing, and the user experience is effectively improved.

The heating head assembly 20 is preferably further provided with a pressing plate 23, and the pressing plate 23 is sleeved on the rubber outlet pipe 212 and clamps the heating sheet 22 between the pressing plate 23 and the front end surface of the heating pipe 211. Specifically, the pressing plate 23 may be connected to the glue outlet pipe 212 through a thread provided on an outer surface of the glue outlet pipe 212, and the pressing plate 23 may limit the sliding of the heating plate 22 on the glue outlet pipe 212.

In the hot melt adhesive gun 1 of the present invention, by providing the metal heating head 21 and the MCH heating sheet 22, the metal heating head 21 has a better heat conductivity, and can transfer the heat of the heating sheet 22 to the heating pipe 211 in a short time, and heat the adhesive stick 2 accommodated in the heating pipe 211; the MCH heating plate 22 has the characteristics of corrosion resistance, high temperature resistance and good heat conduction, compared with the traditional PTC heating plate, the MCH heating plate 22 has higher heat efficiency and higher heating speed, and the MCH heating plate 22 does not contain harmful substances and meets the requirement of higher environmental protection standard.

In some embodiments of the present invention, the hot melt adhesive gun 1 further comprises a rubber guiding tube 30, a first spring 31 and a rubber returning ring 33, and further comprises a second spring 32, the front end of the rubber guiding tube 30 is connected to the rear end of the heating tube 211, the rubber guiding tube 30 is provided with a protrusion, the front end of the rubber returning ring 33 is movably sleeved on the rear end of the rubber guiding tube 30, the first spring 31 is sleeved on the rear end of the rubber guiding tube 30, two ends of the first spring 31 are respectively abutted against the protrusion of the rubber guiding tube 30 and the rubber returning ring 33, the second spring 32 is sleeved outside the rubber guiding tube 30 and can be used for fixing the rubber guiding tube 30 in cooperation with the rubber gun housing 10, the rubber returning ring 33 and the rubber guiding tube 30 are used for the rubber rod 2 to pass through and enter the heating tube 211, the rubber returning ring 33 is in interference fit with the rubber rod 2, specifically, the protrusion on the rubber guiding tube 30 can be an annular protrusion, the front end of the rubber returning ring 33 can be provided with an inner shoulder, one end of the first spring 31 is abutted against the inner shoulder of the rubber returning ring 33, at least one non-return part for clamping the glue stick 2 can be arranged in the glue guide tube 30 to prevent the glue solution melted by the glue stick 2 in the heating tube 211 from flowing to the rear end of the glue guide tube 30.

In the hot melt adhesive gun 1 of the present invention, when the adhesive stick 2 moves toward the heating head assembly 20, the adhesive stick 2 drives the adhesive return ring 33 to move toward the heating head assembly 20 and compress the first spring 31; after the effort that stick 2 moved towards heating element subassembly 20 disappears when the drive, first spring 31 resets and drives and return gluey ring 33 and remove heating element subassembly 20 dorsad, it drives to glue ring 33 and glues stick 2 and remove heating element subassembly 20 dorsad, through setting up glue ring 33, when hot melt adhesive gun 1 stop work, it drives the holding under the effect of first spring 31 to return gluey ring 33 and removes heating element subassembly 20 dorsad at the gluey stick 2 of heating pipe 211, release the inside colloid pressure of heating element 21, reduce the excessive glue of rubber pipe 212 department, the glue dripping, user experience can effectively be improved.

The glue pushing assembly comprises a trigger 40, a trigger tension spring 44, a connecting rod 41, a latch 42 and a sliding block 43, and is used for pushing the glue stick 2 to move towards the heating head assembly 20, in a specific embodiment, the trigger 40 is rotatably arranged on the glue gun housing 10, the lower part of the trigger 40, which is pressed by a hand, extends to the outside of the glue gun housing 10, the upper part of the trigger 40, which is positioned in the glue gun housing 10, is connected with one end of the trigger tension spring 44, the other end of the trigger tension spring 44 is connected with the glue gun housing 10, the upper part of the trigger 40 is hinged with one end of the connecting rod 41, the other end of the connecting rod 41 is hinged with one end of the latch 42, the other end of the latch 42 is hinged with the sliding block 43, and the sliding block.

In the hot melt adhesive gun 1 of the present invention, when the trigger 40 is pressed, the upper portion of the trigger 40 rotates forward, the trigger tension spring 44 is stretched, the upper portion of the trigger 40 drives the latch 42 to rotate through the connecting rod 41 and drives the sliding block 43 to move toward the heating head assembly 20, the latch 42 rotates to latch the glue stick 2 and drive the glue stick 2 to move toward the heating head assembly 20, so as to drive the glue stick 2 to move forward; when the trigger 40 is released, the trigger tension spring 44 is reset and drives the upper part of the trigger 40 to rotate reversely, the upper part of the trigger 40 drives the latch 42 to rotate reversely through the connecting rod 41 and drives the sliding block 43 to move back to the heating head assembly 20, and the latch 42 releases the rubber rod 2 after rotating reversely. Push away gluey subassembly through the setting, press trigger 40 and can drive gluey stick 2 and remove to heating head subassembly 20, go out glue pipe 212 in glue solution after gluey stick 2 melts and extrude along going out glue pipe 212 by the gluey stick 2 that does not melt, accomplish out glue, press trigger 40 in succession and can realize the continuous play of hot melt adhesive rifle 1 and glue, when loosening trigger 40, at rubber pipe 30, under the cooperation of first spring 31 and rubber ring 33, release the inside colloid pressure of heating head 21, reduce the excessive glue of rubber pipe 212 department, the glue dripping.

The PCB assembly comprises a PCB 50 and a smart chip (not shown) for controlling the heating of the heating head assembly 20, in a specific embodiment, the glue gun housing 10 is provided with a key 10b and a light guide post 10c, the PCB 50 is provided with a button 51 corresponding to the key 10b and an indicator 52 corresponding to the light guide post 10c, the key 10b is pressed, the button 51 on the PCB 50 is triggered, the circuit of the PCB 50 is switched on, the indicator 52 is lighted, the light guide post 10c emits light under the irradiation of the indicator 52, and the smart chip starts to work. Specifically, the smart chip may be an MCU smart chip, which may control heating of the heater assembly 20. When the hot melt adhesive gun 1 is started to heat, the current of the heating sheet 22 is the maximum current, and the glue can be quickly melted and discharged; after the heating head 21 is heated, the working current is reduced to about 50% of the maximum current, so that normal glue melting work can be maintained, and overheating of the gun body and glue overflow of the glue outlet pipe 212 are avoided; when the trigger 40 is not pulled, and the hot melt adhesive gun 1 is in a standby state, the working current is reduced to about 40 percent of the maximum current, the basic heating of the heating sheet can be maintained, and the energy consumption is reduced.

The PCB 50 is preferably further provided with an overcurrent protection chip (not shown), an overvoltage protection chip (not shown), an overcharge protection chip (not shown) and an NTC temperature-controlled resistor (not shown), which can improve the safety of the thermal glue gun 1.

In some embodiments of the present invention, the hot melt adhesive gun 1 is preferably provided with a trigger switch 60, the trigger switch 60 is disposed on the adhesive gun housing 10 and adjacent to the trigger 40, when the trigger 40 is pressed, the trigger 40 contacts the trigger switch 60, and the trigger switch 60 can send a signal to the PCB assembly when the trigger 40 contacts the trigger switch 60. Specifically, trigger switch 60 can be connected with PCB board 50 electricity, and hot melt adhesive gun 1 is when using, and trigger 40 is pressed, and trigger switch 60 sends the signal to the PCB subassembly, guarantees the normal operating of hot melt adhesive gun 1, and when hot melt adhesive gun 1 stopped using, trigger 40 loosens, and trigger switch 60 stops sending the signal, and 3 minutes back hot melt adhesive gun 1 auto-power-off has improved the security when hot melt adhesive gun 1 uses.

The utility model discloses in some embodiments, glue the inside preferred tail-hood 70 that is equipped with of rifle casing 10, tail-hood 70 buckle enter into after tail-hood 70 glue mouth 10a in the one end of advancing gluey mouth 10a of shell, glue stick 2, tail-hood 70 with glue stick 2 interference fit, can load in-process centre gripping at gluey stick 2 and glue stick 2. Specifically, tail cap 70 may be a silicone piece, and tail cap 70 and glue stick 2 interference fit for glue stick 2 is stably held when filling, prevents that glue stick 2 from slipping.

The utility model discloses some embodiments, hot melt adhesive gun 1 preferably still is equipped with silica gel cover 71 and radiation shield 72, and silica gel cover 71 and radiation shield 72 are connected respectively and are glued rifle casing 10 and lie in the one end of gluing rifle casing 10's neighbouring heating element subassembly 20, and radiation shield 72 silica and the gum cover in proper order and establish outside heating element subassembly 20, and silica gel cover 71 and radiation shield 72 are passed and are exposed to the one end of the play rubber pipe 212 of heating element subassembly 20. The silica gel sleeve 71 is arranged, so that the silica gel outlet pipe 212 can be supported, the silica gel outlet is more stable and smooth, and the heat insulation sleeve 72 is arranged between the silica gel sleeve 71 and the heating head assembly 20, so that heat loss can be reduced, and energy consumption is reduced.

The utility model discloses in some embodiments, the silica gel cover 71 outside is equipped with visor 73, and specifically, visor 73 can be the transparency, and visor 73 can detachably cover establishes outside silica gel cover 71, and the one end that exposes of play rubber tube 212 is located visor 73. By arranging the protective cover 73, when the hot melt adhesive gun 1 is not used, the protective cover 73 can cover the outside of the silica gel sleeve 71 to protect the rubber outlet pipe 212.

The utility model discloses in some embodiments, glue rifle casing 10 bottom and be equipped with the jack that is used for charging, glue the inside battery jar that is used for placing the lithium cell that is equipped with of rifle casing 10. Specifically, the jack can be Type C mouth that charges, and hot melt adhesive rifle 1 can charge to the lithium cell through Type C mouth that charges for the user does not receive the restriction of inserting the electricity, and it is more convenient, swift to use, and the lithium cell is used for supplying power for parts such as heating head subassembly 20, PCB board 50.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, and all such changes are intended to be within the scope of the following claims.

Claims

1. The utility model provides a hot melt adhesive rifle, is including gluing the rifle casing, glue rifle casing one end and seted up the mouth of advancing of supplying to glue the stick and get into, a serial communication port, glue the inside heating head subassembly that is equipped with of rifle casing, the heating head subassembly is including heating head and heating plate, the heating head is including heating pipe and play hose, the heating pipe is used for the transmission the heat of heating plate glues the stick with the heating, it connects to go out the hose the front end of heating pipe, it is used for supplying to go out the hose glue solution after the stick melts in the heating pipe is followed it flows out to go out the hose, the heating plate cover is located go out on the hose and press close to the front end terminal surface of heating pipe.

2. The hot melt adhesive gun according to claim 1, wherein the heating head assembly further comprises a pressing plate, the pressing plate is sleeved on the glue outlet tube and clamps the heating sheet between the pressing plate and the front end face of the heating tube.

3. The hot melt adhesive gun according to claim 1, wherein said heating tip is a metal heating tip and said heating blade is an MCH heating blade.

4. The hot melt adhesive gun according to claim 1, further comprising a rubber guide tube, a first spring and a rubber return ring, wherein the front end of the rubber guide tube is connected to the rear end of the heating tube, the rubber guide tube is provided with a protrusion, the front end of the rubber return ring is movably sleeved on the rear end of the rubber guide tube, the first spring is sleeved on the rear end of the rubber guide tube, two ends of the first spring are respectively abutted against the protrusion of the rubber guide tube and the rubber return ring, the rubber return ring and the rubber guide tube are used for a rubber rod to pass through and enter the heating tube, and the rubber return ring is in interference fit with the rubber rod;

5. The hot melt adhesive gun according to claim 4, wherein the protrusion on the adhesive guiding tube is an annular protrusion, an inner shoulder is provided at the front end of the adhesive return ring, and one end of the first spring abuts against the inner shoulder of the adhesive return ring.

6. The hot melt adhesive gun according to claim 4, wherein at least one non-return portion is disposed in the adhesive conduit, and the non-return portion is used for clamping the adhesive rod to prevent the melted adhesive from flowing to the rear end of the adhesive conduit.

7. The hot melt adhesive gun according to claim 4, further comprising a second spring, wherein the second spring is sleeved outside the glue guide tube to fix the glue guide tube.

8. The hot melt adhesive gun according to claim 1, further comprising a glue pushing assembly for pushing the glue stick to move toward the heating head assembly, the glue pushing assembly comprising: the trigger is rotatably arranged in the glue gun shell, the lower portion, pressed by a hand, of the trigger extends to the outer side of the glue gun shell, the upper portion, located in the glue gun shell, of the trigger is connected with one end of the trigger tension spring, the other end of the trigger tension spring is connected with the glue gun shell, the upper portion of the trigger is hinged with one end of the connecting rod, the other end of the connecting rod is hinged with one end of the trigger, the other end of the trigger is hinged with the sliding block, and the sliding block is movably arranged in the glue gun shell along the moving direction of the glue stick;

9. The hot melt adhesive gun according to claim 8, wherein a PCB assembly is disposed inside the glue gun housing, the PCB assembly is used for controlling heating of the heating head assembly, the hot melt adhesive gun further comprises a trigger switch, the trigger switch is disposed on the glue gun housing and adjacent to the trigger, the trigger contacts the trigger switch when the trigger is pressed, and the trigger switch is used for sending a signal to the PCB assembly when the trigger contacts the trigger switch.

10. The hot melt adhesive gun according to claim 9, wherein the PCB assembly includes a PCB board and an intelligent chip, the glue gun housing is provided with a key and a light guide pillar, the PCB board is provided with a button corresponding to the key and an indicator corresponding to the light guide pillar, and the intelligent chip is used for controlling heating of the heating head assembly.

11. The hot melt adhesive gun according to claim 1, wherein the adhesive gun housing comprises an inner shell, an outer shell and a bottom cover, the inner shell is disposed in the outer shell, the inner shell comprises a left inner shell and a right inner shell, the left inner shell and the right inner shell are connected in a direction perpendicular to the moving direction of the adhesive stick in a butt joint manner, the outer shell comprises a front outer shell and a rear outer shell, the front outer shell and the rear outer shell are arranged in a butt joint manner in the moving direction of the adhesive stick, the front outer shell and the rear outer shell are respectively connected with the inner shell through fasteners, the outer shell is formed with a handle for being held by a hand, and the bottom cover is fixedly connected with the bottom of the handle.

12. The hot melt adhesive gun according to claim 11, wherein the adhesive gun housing further comprises a base, the base being sleeved on the bottom cover to support the hot melt adhesive gun to stand.

13. The hot melt glue gun according to claim 12, wherein the base is a silicone base.

14. The hot melt adhesive gun according to claim 11, further comprising a tail cap, wherein the tail cap is fastened to one end of the glue inlet of the housing, the glue stick passes through the tail cap and enters the glue inlet, and the tail cap is in interference fit with the glue stick for clamping the glue stick during the filling process of the glue stick.

15. The hot melt adhesive gun according to claim 1, further comprising a silicone sleeve and a heat insulation sleeve, wherein the silicone sleeve and the heat insulation sleeve are respectively connected to the glue gun housing and located at one end of the glue gun housing adjacent to the heating head assembly, the heat insulation sleeve and the silicone sleeve are sequentially covered outside the heating head assembly, and one end of the glue outlet pipe of the heating head assembly passes through the silicone sleeve and the heat insulation sleeve and is exposed.

16. The hot melt gun according to claim 15, further comprising a protective cover for detachably covering the silicone sleeve, wherein the exposed end of the glue outlet tube is located in the protective cover.