A glue gun

Abstract

The application discloses a glue gun, comprising a movable handle and a fixed handle, the movable handle is connected with the fixed handle through a pivot pin, an actuating member is further arranged on the movable handle, the actuating member has an actuating part matched with a pushing member, the distance between the pivot pin and the actuating part is set to be switchable between two or more gears, so as to change the force applied on the pushing member by the actuating member. The gear adjustment of the application can realize the conversion between the fast feeding and the powerful feeding, and the user can adjust according to the actual needs.

Description

Technical Field

[0001] This invention relates to the field of hardware equipment, and in particular to a glue gun, belonging to the technical field of production, processing, manufacturing, and construction tools. Background Technology

[0002] When using a glue gun, the glue is repeatedly squeezed and extruded by pushing the lever on the gun handle. One end of the glue gun has a trigger mechanism for the user to hold and press. By pressing the trigger, the glue gun's mechanical structure drives the glue inside, causing it to be dispensed from the nozzle. One glue gun can accommodate various glues with different properties, each with varying flow characteristics. Common glue guns only have a fixed extrusion mechanism, making it very difficult to achieve uniform glue dispensing. In specific glue gun applications, the size of the dispensing area varies, requiring different dispensing speeds. With only a fixed extrusion mechanism, the dispensing speed of the glue can only be controlled by the user's hand pressure. However, especially when the user applies significant force to the handle, controlling the pressing speed while applying force is extremely difficult. When using a glue gun for the first time, issues such as the glue solidifying due to prolonged disuse and its static viscosity often require significant force to operate. However, once the glue flow stabilizes, the required force decreases considerably. Common glue guns with fixed extrusion mechanisms cannot address these problems. Furthermore, it's common to encounter situations where excessive force is applied initially to expel glue, making it difficult to control the extrusion speed, leading to over-extrusion and glue waste.

[0003] Therefore, those skilled in the art are dedicated to developing a glue gun with adjustable settings that allow switching between rapid and high-pressure feed, enabling users to adjust it according to their actual needs. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is how to achieve adjustable speed of the glue gun.

[0005] To achieve the above objectives, the present invention provides a glue gun, including a movable handle and a fixed handle, wherein the movable handle is connected to the fixed handle via a pivot pin; the movable handle is also provided with an actuator, the actuator having an actuating part that cooperates with a pusher; the distance between the pivot pin and the actuating part is set to be switchable between two or more settings, thereby changing the magnitude of the force applied by the actuator to the pusher.

[0006] Furthermore, the movable handle is provided with a slide groove, which has two or more positions; the pivot pin is configured to slide within the slide groove to switch between positions.

[0007] Furthermore, the fixed handle is provided with a slide groove, which has two or more positions; the pivot pin is configured to slide within the slide groove to switch between positions.

[0008] Furthermore, an elastic component is provided between the movable handle and the fixed handle; the elastic component is configured to generate a preload on the movable handle so that the pivot pin is held in one of the positions.

[0009] Furthermore, the pivot pin is a stepped pin, which has a pressing end and an elastic member sleeved on the pressing end. The stepped pin has a first shaft diameter and a second shaft diameter. The shaft diameter of the first shaft diameter is larger than the width of the slide groove, and the shaft diameter of the second shaft diameter is smaller than the width of the slide groove. The stepped pin is configured such that, under the biasing action of the elastic member, the first shaft diameter is located in the gear position. When the pressing end is pressed, the stepped pin moves axially, causing the second shaft diameter to enter the gear position. When the pressing end is released, the stepped pin moves axially in the opposite direction under the restoring force of the elastic member, causing the first shaft diameter to re-enter the gear position.

[0010] Furthermore, the groove can be an arc-shaped groove or a straight groove.

[0011] Furthermore, the active handle is provided with a slide groove, which has two or more positions; the actuator is configured to slide within the slide groove to switch between positions.

[0012] Furthermore, the actuator also includes a pivot, and the actuating part on the actuator is configured to slide about the pivot in a groove.

[0013] Furthermore, the brake element is sleeved on the push rod, and one end of the brake element cooperates with the limiting groove of the main body. The one end of the brake element moves between the first limiting end and the second limiting end of the limiting groove, so that the push rod has a free travel distance from the first limiting end to the second limiting end during the pushing process.

[0014] Furthermore, the idle stroke is 3-5 mm.

[0015] Compared with the prior art, the beneficial effects of this invention are: 1) When the pivot pin is close to the actuating part, the force exerted by the actuating part on the pusher increases, which is suitable for colloids with poor flowability; when the pivot pin is far from the actuating part, the force exerted by the actuating part on the pusher decreases, which is suitable for colloids with good flowability; 2) The elastic component between the movable handle and the fixed handle can prevent the pivot pin from automatically jumping to other positions when gripping the movable handle, thus fixing the position; 3) Pressing the stepped pin under the biasing effect of the elastic component can easily achieve multi-position shifting; 4) The adjustable position realizes the conversion between rapid feed and high-pressure feed, allowing the user to adjust according to actual needs; 5) The empty stroke setting releases the internal stress of the colloid in the glue bucket, preventing the colloid from flowing out of the glue outlet.

[0016] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a glue gun structure according to a preferred embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A partial structural exploded view of the glue gun in the image;

[0019] Figure 3 yes Figure 1 A diagram illustrating the first gear position in the system;

[0020] Figure 4 yes Figure 1 The intention of the second gear;

[0021] Figure 5 This is a schematic diagram of a glue gun structure according to another preferred embodiment of the present invention;

[0022] Figure 6 yes Figure 5 A partial structural breakdown diagram of a glue gun;

[0023] Figure 7 yes Figure 5 A cross-sectional view of the glue gun along the AA direction;

[0024] Figure 8 This is a schematic diagram of a glue gun structure according to another preferred embodiment of the present invention;

[0025] Figure 9 yes Figure 8 A schematic diagram of a local structure in the image;

[0026] Figure 10 yes Figure 8 A cross-sectional view of the actuator in the image;

[0027] Figure 11 This is a schematic diagram of a glue gun according to another preferred embodiment of the present invention. Detailed Implementation

[0028] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0029] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0030] Figure 1-4 A preferred embodiment of the present invention is shown, such as Figure 1 and 2 As shown, the glue gun of this embodiment includes a pushing device, a main body 3, and a trigger device. One end of the main body 3 forms a receiving portion 1, which is cylindrical to accommodate a glue cartridge. The other end of the main body 3 is hinged to the trigger device by fasteners or integrally formed to form a gun-shaped fixed handle 16.

[0031] The pushing device includes a pusher 8, a push rod 2, and a pusher body 10. The first end of the push rod 2 is placed inside the receiving portion 1, and the pusher body 10 is fixed to the end of the first end of the push rod 2 and can reciprocate with the push rod 2. The pusher 8 is sleeved on the second end of the push rod 2, and a return spring 7 is provided between the pusher 8 and the main body 3. A trigger device pushes the pusher 8, causing the push rod 2 to move towards the pusher body 10, and the return spring 7 returns the push rod 8 to its original position. A brake 4 is also provided on the push rod 2, and a compression spring 9 is provided between the brake 4 and the main body 3. The brake 4, pushed by the compression spring 9, locks the push rod 2, allowing it to move only towards the pusher body 10. When a rubber sleeve needs to be installed, pressing the brake 4 releases the push rod 2 to adjust its position. The brake 4 and the limiting groove of the main body 3 cooperate with each other, and one end of the brake 4 moves between the first and second limiting ends of the limiting groove. During dispensing, the brake 4 moves from the second limit end to the first limit end. At this time, the push rod 2 pushes the glue container for a short distance, which is the distance between the first and second limit ends. Preferably, the distance of the short distance is 3-5 mm. When dispensing is finished, the movable handle 5 is released, and the brake 4 moves from the first limit end to the second limit end to release the force exerted by the movable handle 5 on the push rod 2. This releases the internal stress of the glue in the glue container and prevents the glue from flowing out of the dispensing port.

[0032] The trigger device includes a movable handle 5 and a fixed handle 16. The movable handle 5 is connected to the fixed handle 16 through a pivot pin shaft 12. An actuator 11 is also provided on the movable handle 5, and the actuator 11 passes through a hole 14 on the movable handle 5 and contacts a pusher 8. The movable handle 5 is provided with a chute 13, and the chute 13 is an arc-shaped structure with two gears. The pivot pin shaft 12 can slide within the chute 13. A tension spring 6 is provided between the movable handle 5 and the fixed handle 16, and the tension spring 6 generates a pre-tightening force on the movable handle 5 to keep the pivot pin shaft 12 within one of the gears. Applying a gripping force to the movable handle 5, the pivot pin 11 pushes the pusher 8 to move the push rod 2. Removing the applied force, the brake 4 locks the push rod 2, and under the action of the return spring 7, the pusher 8 slides back to its initial position relative to the main body 3, and then the next cycle can be carried out.

[0033] Figure 3 and 4 shows the change in the distance between the pivot pin shaft 12 and the actuator 11 between different gears. When the pivot pin shaft 12 is in the first gear, the distance between the pivot pin shaft 12 and the actuator 11 is set as L1, and the perpendicular distance between the pivot pin shaft 12 and the applied force on the movable handle 5 is set as L3. When the pivot pin shaft 12 is in the second gear, the distance between the pivot pin shaft 12 and the actuator 11 is set as L2, and the perpendicular distance between the pivot pin shaft 12 and the applied force on the movable handle 5 is set as L4. L1 > L3, L2 < L4. When in the first gear, the driving force generated by applying the same force at the movable handle 5 is smaller than that in the second gear, and the driving process is larger than that in the second gear. Pulling the movable handle 5 outwards, at this time the tension spring 6 is subjected to an outward pulling force and becomes longer, and the pivot pin shaft 12 will switch gears within the chute 13 to adapt to fluids with different fluidities.

[0034] In other embodiments, the fixed handle 5 is provided with a chute, and the chute is provided with two or more gears. The pivot pin shaft 12 is arranged to be slidable within the chute to switch between gears.

[0035] In other embodiments, as Figure 5-7 shown, the tension spring 6 between the movable handle 5 and the fixed handle 16 is removed. The pivot pin shaft 12 is set as a stepped pin shaft 102, and the stepped pin shaft 102 has a pressing end and a fixed end fixed to a screw 101. A spring 104 and a gasket 105 are sleeved on the pressing end. The stepped pin shaft 102 has a first shaft diameter portion and a second shaft diameter portion. The shaft diameter of the first shaft diameter portion is greater than the width of the chute 103, and the shaft diameter of the second shaft diameter portion is less than the width of the chute 103. Under the biasing action of the spring 104, the first shaft diameter portion is located within the gear. When pressing the pressing end, the stepped pin shaft undergoes an axial movement, causing the second shaft diameter portion to enter the gear. At the same time, the second gear is switched within the chute 103. When releasing the pressing end, the stepped pin shaft undergoes an opposite axial movement under the restoring force of the elastic component, causing the first shaft diameter portion to re-enter the gear. Preferably, as Figure 11 As shown, the slide groove 301 is linear and has multiple gears, and the stepped pin 302 slides within the slide groove 301 to achieve gear switching.

[0036] Figure 8-10 Another preferred embodiment of the invention is shown. The movable handle 5 is hinged to the fixed handle 16 via a pivot pin 201. The movable handle 5 also has a slide groove 202. The actuator further includes a pivot 204 and an actuating portion 206 that contacts the pusher 8. The actuating portion 206 is configured to slide about the pivot 204 in the slide groove 202. A toggle member 203 is connected to the pivot 204 and the actuating portion 206. By toggle the toggle member 203, the actuating portion 206 slides between the two ends of the slide groove 202, thereby changing the contact position between the pivot pin 206 and the pusher 8, achieving multiple gear positions.

[0037] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A glue gun, characterized in that, It includes a movable handle and a fixed handle, wherein the movable handle is connected to the fixed handle via a pivot pin; The movable handle is also provided with an actuator, which has an actuating part that cooperates with the pusher; The distance between the pivot pin and the actuator is set to be switchable between two or more positions, thereby changing the magnitude of the force applied by the actuator to the pusher. The movable handle is provided with a slide groove, and the slide groove has two or more gear positions; the actuating part is configured to slide within the slide groove to switch between the gear positions; The actuator further includes a pivot, and the actuating portion on the actuator is configured to slide about the pivot in the groove; The actuator further includes a toggle member connected to the pivot and the actuating part, which causes the actuating part to slide in the groove.

2. The glue gun as described in claim 1, wherein, The glue gun also includes: The main body, one end of which forms a receiving portion for accommodating the rubber tube; A push rod, one end of which is provided with a pushing body, which is configured to reciprocate with the push rod; A braking component is sleeved on the push rod. One end of the braking component cooperates with the limiting groove of the main body. The one end of the braking component moves between the first limiting end and the second limiting end of the limiting groove, so that the push rod has a free travel distance from the first limiting end to the second limiting end during the pushing process.

3. The glue gun as described in claim 2, wherein, The idle travel is 3~5 mm.

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