Automatic glue gun

Abstract

The utility model discloses an automatic glue feeding glue gun relates to hot melt glue gun field, including the casing, the feeding port is seted up in one side of casing, and the glue nozzle is installed in the other side of casing, automatic glue feeding subassembly is installed in the casing and is close to feeding port, and the glue stick passes feeding port and automatic glue feeding subassembly in proper order, and the force is applied simultaneously through automatic glue feeding subassembly in the both sides of glue stick, and the glue stick is transported along the axial direction, heating assembly is installed in the casing between automatic glue feeding subassembly and glue nozzle, PCB control subassembly is installed in the casing, and this PCB control subassembly controls automatic glue feeding subassembly and heating assembly through electric connection, and the trigger is triggered control signal through micro -switch, and micro -switch controls automatic glue feeding subassembly action through electric connection. The utility model adopts modularization design, and through selecting corresponding glue feeding module, motor and transmission module, can match the product of different glue stick, different voltage, different thrust requirement, adopts the frame type both sides glue feeding structure and is more stable, and the strength is better.

Description

Technical Field

[0001] This utility model relates to the field of hot melt glue guns, and specifically to an automatic glue dispensing gun. Background Technology

[0002] A hot melt glue gun is a device that melts glue sticks and sprays the glue onto a workpiece for sealing. Currently, hot melt glue guns are generally powered by electricity, with an internal heating element that melts the pushed-in glue stick. The molten glue is then extruded through the nozzle. However, existing glue gun feeding structures are not stable enough, generally using single-sided feeding and lacking corresponding positioning mechanisms. This causes the glue stick to wobble during feeding, affecting the glue extrusion. Furthermore, different sizes of glue sticks require different motors and reduction gears, increasing production and manufacturing costs. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an automatic glue dispensing gun. It adopts a modular design and can be matched with products with different glue sticks, different voltages, and different thrust requirements by selecting the corresponding glue dispensing module, motor module (motor) and reduction module (transmission module). The frame-type glue dispensing structure with two sides is more stable and has better strength.

[0004] The objective of this utility model is achieved through the following technical solution: This automatic glue-feeding gun includes:

[0005] The housing has an inlet on one side for inserting the glue stick, and a dispensing nozzle on the other side.

[0006] An automatic glue feeding assembly is installed inside the housing and close to the feed inlet. The glue rod passes through the feed inlet and the automatic glue feeding assembly in sequence. The automatic glue feeding assembly applies force to both sides of the glue rod simultaneously, thereby conveying the glue rod axially.

[0007] The heating component is installed in the housing between the automatic glue feeding component and the glue nozzle, and is used to heat and melt the glue stick;

[0008] The PCB control component, installed inside the housing and powered externally via a cable, controls the automatic glue feeding component and the heating component through electrical connections, thereby adjusting the glue feeding speed and heating temperature; and

[0009] The trigger is movably connected to the housing for pressing. The trigger triggers a control signal via a microswitch, which in turn controls the automatic glue feeding assembly via an electrical connection.

[0010] One end of the heating component faces the automatic glue feeding component to receive the glue rod conveyed by the automatic glue feeding component, and the other end of the heating component is connected to the glue outlet to discharge the glue liquid generated after the glue rod melts.

[0011] As a further technical solution, the automatic glue feeding assembly includes a motor, a transmission module driven by the motor, and a glue feeding module connected and driven by the transmission module. The glue feeding module has a glue feeding hole in the center for the glue stick to pass through. The glue feeding module has various specifications to correspond to different glue feeding hole diameters, which are used to adapt to glue sticks of different diameters. The transmission module has various specifications to correspond to different torque outputs, and the motor has various specifications to correspond to different voltage inputs.

[0012] As a further technical solution, the glue feeding module includes an outer shell formed by the snap-fitting of an upper shell and a lower shell. The glue feeding hole is opened through the center of the upper shell. The first glue feeding tooth and the second glue feeding tooth installed inside the outer shell are located on both sides of the glue feeding hole, thereby applying force to both sides of the glue rod simultaneously. The upper shell, the lower shell, the first glue feeding tooth, and the second glue feeding tooth together form a frame-type glue feeding structure. The first glue feeding tooth has a first transmission tooth integrally formed on it, and the second glue feeding tooth has a second transmission tooth and a third transmission tooth integrally formed on it. The active tooth driven by the output shaft of the transmission module meshes with the third transmission tooth, and the second transmission tooth meshes with the first transmission tooth.

[0013] As a further technical solution, the heating component includes a melting tube located behind the automatic glue feeding component. The automatic glue feeding component feeds the glue stick into the melting tube, and heating tubes are arranged on both sides of the melting tube.

[0014] As a further technical solution, a guide sealing sleeve is installed at the end of the melting tube facing the automatic glue feeding component, and the end of the melting tube away from the automatic glue feeding component is connected to the glue outlet.

[0015] As a further technical solution, a temperature-sensing thermocouple is installed on the melting tube to monitor the temperature of the melting tube in real time and send the data to the PCB control component. The PCB control component then controls the operation of the heating tube via an electrical connection.

[0016] As a further technical solution, a trigger rod is provided inside the trigger, which is directly opposite the contact of the micro switch. A spring is sleeved on the trigger rod. When the trigger is pressed, the trigger rod contacts the contact, causing the micro switch to send a control signal. When the trigger is released, the spring drives the trigger to reset.

[0017] As a further technical solution, the PCB control component includes a digital display screen and a main control circuit board, which are electrically connected. The digital display screen is used to display the heating temperature and glue feeding speed. The digital display screen is equipped with adjustment buttons, setting buttons and a power button. The power button is used to start the glue gun, the adjustment buttons are used to adjust the heating temperature or glue feeding speed, and the setting button is used to switch the adjustment level of the heating temperature or glue feeding speed. The main control circuit board is also electrically connected to the automatic glue feeding component and the heating component to realize control.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. A feeding tooth is set on each side of the feeding hole of the automatic glue feeding component to achieve simultaneous glue feeding from both sides, which is more stable and reliable. The upper and lower shells on the outside of the feeding hole and the two feeding teeth together form a frame-type glue feeding structure, which has better strength and stability, and the glue stick is less likely to shake during feeding.

[0020] 2. In the automatic glue feeding assembly, the glue feeding module, transmission module and motor all adopt a modular and replaceable design, which can be matched with products with different glue sticks, different voltages and different thrust requirements, making it more versatile and reducing production and design costs.

[0021] 3. The digital display screen is equipped with adjustment buttons, setting buttons and power buttons, which can adjust the heating temperature and glue feeding speed at any time, making it convenient for users to adjust the operation according to actual needs. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the main structure of this utility model (with one side of the shell hidden).

[0024] Figure 3 This is a schematic diagram of the structure of the glue stick, automatic glue feeding component, and heating component assembled in this utility model.

[0025] Figure 4 This is a schematic diagram of the automatic glue feeding assembly in this utility model.

[0026] Figure 5 This is a schematic diagram of the transmission structure of the automatic glue feeding component in this utility model.

[0027] Figure 6 This is a schematic diagram of the structure of the glue stick in the automatic glue feeding assembly of this utility model (with the upper shell hidden).

[0028] Figure 7 This is a schematic diagram of the structure of the digital display screen in this utility model.

[0029] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Automatic glue feeding assembly; 21. Glue feeding module; 21. Upper housing; 211. Lower housing; 212. Glue feeding hole; 213. First glue feeding tooth; 214. Second glue feeding tooth; 215. First transmission tooth; 216. Second transmission tooth; 217. Third transmission tooth; 218. Active tooth; 219. Transmission module; 22. Motor; 23. Guide sealing sleeve; 3. Heating assembly; 4. Melting tube; 41. Heating tube; 42. Temperature sensing thermocouple; 43. Trigger; 5. Trigger rod; 51. Spring; 52. Micro switch; 6. Contact piece; 61. PCB control assembly; 7. Digital display screen; 71. Main control circuit board; 72. Adjustment button; 73. Setting button; 74. Power button; 75. Cable; 8. Glue stick; 9. Glue outlet; 10. Feed port; 11. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings:

[0031] Example: As attached Figures 1-7 As shown, this automatic glue-feeding gun includes a housing 1, an automatic glue-feeding assembly 2, a glue-feeding module 21, an upper shell 211, a lower shell 212, a glue-feeding hole 213, a first glue-feeding tooth 214, a second glue-feeding tooth 215, a first transmission tooth 216, a second transmission tooth 217, a third transmission tooth 218, an active tooth 219, a transmission module 22, a motor 23, a guide sealing sleeve 3, a heating assembly 4, a melting tube 41, a heating tube 42, a temperature-sensing thermocouple 43, a trigger 5, a trigger rod 51, a spring 52, a micro switch 6, a contact piece 61, a PCB control assembly 7, a digital display screen 71, a main control circuit board 72, an adjustment button 73, a setting button 74, a power button 75, a cable 8, a glue stick 9, a glue nozzle 10, and a feed port 11.

[0032] Reference Appendix Figure 1 , 2 An inlet 11 is opened on one side (left side) of the housing 1, and the glue rod 9 is put into the housing 1 through the inlet 11. A glue outlet 10 is installed on the other side (right side) of the housing 1.

[0033] like Figure 2 , 4 As shown, the automatic glue feeding assembly 2 is installed inside the housing 1 and near the feed inlet 11. The glue rod 9 passes through the feed inlet 11 and the automatic glue feeding assembly 2 in sequence. The automatic glue feeding assembly 2 applies force to both sides of the glue rod 9 simultaneously, thereby conveying the glue rod 9 axially. (See attached diagram) Figure 3 , 4 5. 6. The automatic glue feeding assembly 2 includes a motor 23, a transmission module 22 driven by the motor 23, and a glue feeding module 21 connected and driven by the transmission module 22. A glue feeding hole 213 is formed in the center of the glue feeding module 21, through which the glue rod 9 can pass. The glue feeding module 21 has three specifications: 18mm, 11mm, and 7mm, corresponding to different glue feeding hole 213 diameters, capable of accommodating glue rods 9 of different diameters. The transmission module 22 has three specifications: 100N thrust, 50N thrust, and 30N thrust, corresponding to different torque outputs. The motor 23 has multiple specifications (24V, 18V, 12V, 7.2V, 3.6V), corresponding to different voltage inputs. Preferably, in this embodiment, the glue rod diameter is 18mm, and the corresponding glue feeding module 21 is of the 18mm specification. A 24V 370 motor + 18mm glue feeding module + 100N motor transmission module is used. For other product specifications (different specifications of glue stick 9), the corresponding module can be replaced to achieve universal compatibility.

[0034] Furthermore, the glue feeding module 21 includes an outer shell formed by the snap-fitting of an upper shell 211 and a lower shell 212. A glue feeding hole 213 is opened through the center of the upper shell 211. A first glue feeding tooth 214 and a second glue feeding tooth 215 are installed inside the outer shell, and the first glue feeding tooth 214 and the second glue feeding tooth 215 are respectively located on the left and right sides of the glue feeding hole 213, thereby applying force to both sides of the glue rod 9 simultaneously. Simultaneous glue feeding from both sides is more stable and reliable. In addition, the upper shell 211, the lower shell 212, and the two glue feeding teeth (the first glue feeding tooth 214 and the second glue feeding tooth 215) outside the glue feeding hole 213 together form a frame-type glue feeding structure, which has better strength and stability, and the glue rod is less likely to shake during transport.

[0035] like Figure 5 As shown, the first feeding tooth 214 has a first transmission tooth 216 integrally formed on it, and the second feeding tooth 215 has a second transmission tooth 217 and a third transmission tooth 218 integrally formed on it, wherein the second transmission tooth 217 is above the third transmission tooth 218. The output shaft of the transmission module 22 (a commercially available gear reducer) is connected to drive the active tooth 219, which is also installed in the housing. The active tooth 219 meshes with the third transmission tooth 218, and at the same time, the second transmission tooth 217 meshes with the first transmission tooth 216.

[0036] Reference Appendix Figure 3 The heating component 4 is installed inside the housing 1 between the automatic glue feeding component 2 and the dispensing nozzle 10, and is capable of heating and melting the glue stick 9. One end (front end) of the heating component 4 faces the automatic glue feeding component 2 and can receive the glue stick 9 conveyed by the automatic glue feeding component 2. The other end (rear end) of the heating component 4 is connected to the dispensing nozzle 10 and can discharge the glue liquid generated after the glue stick 9 is melted. Further, the heating component 4 includes a melting tube 41 disposed behind the automatic glue feeding component 2. A guide sealing sleeve 3 is installed on the end of the melting tube 41 facing the automatic glue feeding component 2. The guide sealing sleeve 3 guides the conveying of the glue stick 9 and prevents the glue liquid from flowing back. At the same time, the end of the melting tube 41 away from the automatic glue feeding component 2 is connected to the dispensing nozzle 10. The glue stick 9 is fed into the melting tube 41 by the automatic glue feeding component 2, and heating tubes 42 are arranged on both sides of the melting tube 41. Preferably, a temperature-sensing thermocouple 43 is installed on the melting tube 41 to monitor the temperature of the melting tube 41 in real time and send the data to the PCB control component 7. The PCB control component 7 controls the heating tube 42 to work through an electrical connection (signal).

[0037] like Figure 2 , 7As shown, the PCB control component 7 is installed inside the housing 1 and is externally powered via cable 8. This PCB control component 7 controls the automatic glue feeding component 2 and the heating component 4 via electrical connection, thereby adjusting the glue feeding speed and heating temperature. Furthermore, the PCB control component 7 includes a digital display screen 71 and a main control circuit board 72, which are electrically connected. The digital display screen 71 displays the heating temperature and glue feeding speed. In addition, the digital display screen 71 is equipped with an adjustment button 73, a setting button 74, and a power button 75. The power button 75 starts the glue gun (controlling the heating component 4 to start preheating via the main control circuit board 72), the adjustment button 73 adjusts the heating temperature or glue feeding speed, and the setting button 74 switches between the adjustment levels of the heating temperature or glue feeding speed. The main control circuit board 72 is also electrically connected to the automatic glue feeding component 2 and the heating component 4 to achieve control.

[0038] Reference Appendix Figure 1 , 2 The trigger 5 is movably connected to the housing 1 for easy pressing by the user. A trigger lever 51 is located inside the trigger 5, directly opposite the contact plate 61 of the micro switch 6. A spring 52 is fitted onto the trigger lever 51. When the trigger 5 is pressed, the trigger lever 51 contacts the contact plate 61, triggering the trigger 5 to activate a control signal via the micro switch 6. The micro switch 6 then electrically controls the automatic glue feeding assembly 2. When the trigger 5 is released, the spring 52 returns the trigger 5 to its original position, the micro switch 6 stops sending control signals, and the automatic glue feeding assembly 2 stops operating.

[0039] The working process of this utility model:

[0040] Before use, connect cable 8 to external AC power and press the power button 75 next to the digital display screen 71. The glue gun will start preheating (the glue stick 9 passes through the automatic glue feeding assembly 2 and the guide sealing sleeve 3 before entering the melting tube 41). The main control circuit board 72 controls the heating tube 42 through the signal to heat the glue stick 9 in the melting tube 41 to the set temperature. At the same time, the temperature sensing thermocouple 43 monitors in real time and cuts off the power to the heating tube 42 when the set temperature is exceeded. In use, the user presses trigger 5, activating microswitch 6. Microswitch 6 sends a signal to motor 23, controlling motor 23 to operate. The input end of transmission module 22 is connected to and driven by the motor shaft. After deceleration, the output end of transmission module 22 rotates, driving the active gear 219 of glue feeding module 21 to rotate. Active gear 219 meshes with third transmission gear 218, while second transmission gear 217 meshes with first transmission gear 216. At this time, the first and second glue feeding teeth 214 and 215 on both sides of glue feeding hole 213 (glue rod 9) rotate synchronously, applying force to both sides of glue rod 9 simultaneously, feeding glue from both sides simultaneously, making it more stable and reliable. Moreover, the upper shell 211, lower shell 212, and two glue feeding teeth on the outside of glue feeding hole 213 together form a frame-type glue feeding structure, making the glue feeding process more stable. Under the pressure of glue rod 9 at the rear, the melted glue is squeezed out from the glue nozzle 10.

[0041] It is understood that, for those skilled in the art, any equivalent substitutions or modifications to the technical solutions and inventive concepts of this utility model should fall within the protection scope of the appended claims.

Claims

1. An automatic glue-feeding gun, characterized in that, include: The housing (1) has an inlet (11) on one side for inserting glue rods (9) and a dispensing nozzle (10) on the other side. Automatic glue feeding assembly (2) is installed inside the housing (1) and close to the feed port (11). The glue rod (9) passes through the feed port (11) and the automatic glue feeding assembly (2) in sequence. The automatic glue feeding assembly (2) applies force on both sides of the glue rod (9) at the same time, thereby conveying the glue rod (9) axially. Heating component (4) is installed in housing (1) between automatic glue feeding component (2) and glue nozzle (10) for heating and melting glue stick (9). The PCB control component (7) is installed inside the housing (1) and is externally powered via a cable (8). This PCB control component (7) controls the automatic glue feeding component (2) and the heating component (4) via electrical connections, thereby adjusting the glue feeding speed and heating temperature; and The trigger (5) is movably connected to the housing (1) for pressing. The trigger (5) triggers a control signal through the micro switch (6). The micro switch (6) controls the automatic glue feeding assembly (2) to operate through an electrical connection. One end of the heating component (4) faces the automatic glue feeding component (2) to receive the glue rod (9) conveyed by the automatic glue feeding component (2), and the other end of the heating component (4) is connected to the glue outlet (10) to discharge the glue liquid generated after the glue rod (9) melts.

2. The automatic glue-feeding gun according to claim 1, characterized in that: The automatic glue feeding assembly (2) includes a motor (23), a transmission module (22) driven by the motor (23), and a glue feeding module (21) connected and driven by the transmission module (22). The glue feeding module (21) has a glue feeding hole (213) in the center for the glue rod (9) to pass through. The glue feeding module (21) has various specifications corresponding to different glue feeding hole (213) diameters to adapt to glue rods (9) of different diameters. The transmission module (22) has various specifications corresponding to different torque outputs, and the motor (23) has various specifications corresponding to different voltage inputs.

3. The automatic glue-feeding gun according to claim 2, characterized in that: The glue delivery module (21) includes an outer shell formed by fastening an upper shell (211) and a lower shell (212). The glue delivery hole (213) is opened through the center of the upper shell (211). The first glue delivery tooth (214) and the second glue delivery tooth (215) installed inside the outer shell are located on both sides of the glue delivery hole (213), thereby applying force to both sides of the glue rod (9) simultaneously. The upper shell (211), the lower shell (212), and the first glue delivery tooth (214) are located outside the glue delivery hole (213). The first and second feeding teeth (215) together form a frame-type feeding structure; the first feeding tooth (214) has a first transmission tooth (216) integrally formed on it, and the second feeding tooth (215) has a second transmission tooth (217) and a third transmission tooth (218) integrally formed on it. The active tooth (219) driven by the output shaft of the transmission module (22) meshes with the third transmission tooth (218) for transmission, and the second transmission tooth (217) meshes with the first transmission tooth (216) for transmission.

4. The automatic glue-feeding gun according to claim 1, characterized in that: The heating component (4) includes a melting tube (41) located behind the automatic glue feeding component (2). The automatic glue feeding component (2) feeds the glue rod (9) into the melting tube (41), and heating tubes (42) are provided on both sides of the melting tube (41).

5. The automatic glue-feeding gun according to claim 4, characterized in that: The end of the melt tube (41) facing the automatic glue feeding assembly (2) is equipped with a guide sealing sleeve (3), and the end of the melt tube (41) away from the automatic glue feeding assembly (2) is connected to the glue outlet (10).

6. The automatic glue-feeding gun according to claim 4, characterized in that: A temperature-sensing thermocouple (43) is installed on the melting tube (41) to monitor the temperature of the melting tube (41) in real time and send it to the PCB control component (7). The PCB control component (7) controls the operation of the heating tube (42) through electrical connection.

7. The automatic glue-feeding gun according to claim 1, characterized in that: The trigger (5) is provided with a trigger rod (51) inside. The trigger rod (51) is directly opposite the contact piece (61) of the micro switch (6). A spring (52) is sleeved on the trigger rod (51). When the trigger (5) is pressed, the trigger rod (51) contacts the contact piece (61), causing the micro switch (6) to send a control signal. When the trigger (5) is released, the spring (52) drives the trigger (5) to reset.

8. The automatic glue-feeding gun according to claim 1, characterized in that: The PCB control component (7) includes a digital display screen (71) and a main control circuit board (72), which are electrically connected. The digital display screen (71) is used to display the heating temperature and glue feeding speed. The digital display screen (71) is equipped with an adjustment button (73), a setting button (74) and a power button (75). The power button (75) is used to start the glue gun. The adjustment button (73) is used to adjust the heating temperature or glue feeding speed. The setting button (74) is used to switch the adjustment level of the heating temperature or glue feeding speed. The main control circuit board (72) is also electrically connected to the automatic glue feeding component (2) and the heating component (4) to realize control.

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