Glue gun handle and glue gun

Abstract

The invention provides a glue gun handle and a glue gun, and relates to the field of gluing tools, the glue gun handle comprises an automatic proportion adjusting module, the upper end of a pulling handle of the glue gun handle is rotatably connected to the front side of a grip through a connecting shaft, and the automatic proportion adjusting module comprises a driving shaft and a sliding groove; the driving shaft is mounted at the upper end of the pulling handle and is used for acting on the glue gun driving piece in an assembling state; the chute is arranged at the upper end of the wrench handle; one of the connecting shaft and the driving shaft is slidably installed in the sliding groove to serve as a relative sliding shaft, and the other one serves as a relative fixing shaft. And the relative sliding shaft can slide along the sliding groove under the action of pressure and is positioned at different positions of the sliding groove according to the magnitude of the pressure value, so that the distance between the driving shaft and the connecting shaft is changed. According to the glue gun handle and the glue gun provided by the invention, the driving proportion of the glue gun can be automatically adjusted according to the viscosity of glue, so that the convenience when a user operates the glue gun is improved, and the working efficiency and the reliability of construction results are improved.

Description

Technical Field

[0001] The invention relates to the field of glue-spraying tools, in particular to a glue gun handle and a glue gun. Background Art

[0002] Glue guns, as a common gluing tool, are widely used in home decoration and industrial applications. With the diversification of architectural decoration and industrial manufacturing needs, users have increasingly demanding performance from glue guns. The drive rate of a glue gun is one of the key parameters that influences its user experience.

[0003] In the prior art, the drive ratio (also called propulsion ratio) design of glue guns is mainly divided into two types: one is a glue gun using a single fixed ratio. Although this design is simple in structure and easy to operate, it cannot adapt to the needs of colloids with different viscosities and different construction scenarios; the other is a glue gun equipped with two ratios and a ratio conversion module. However, the ratio conversion modules equipped with this type of glue guns in the prior art all require manual adjustment to switch the ratio mode. Although this design expands the usage scenarios to a certain extent, since the user is required to manually switch the ratio mode before use, it not only affects work efficiency, but is also particularly inconvenient in construction environments that require frequent switching of the drive ratio. It not only increases the complexity of operation, but is also prone to construction quality problems due to forgetting to adjust. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a glue gun handle and a glue gun, which can automatically adjust the glue gun driving ratio according to the viscosity of the colloid, so as to alleviate the above-mentioned technical problems existing in the prior art.

[0005] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions: In a first aspect, an embodiment of the present invention provides a glue gun handle, comprising a grip, a trigger, and a connecting shaft, wherein the upper end of the trigger is rotatably connected to the front side of the grip via the connecting shaft; the glue gun handle further comprises an automatic proportional adjustment module; the automatic proportional adjustment module comprises: A drive shaft is mounted on the upper end of the trigger handle and is used to act on the drive plate of the glue gun in the assembled state; A slide groove is provided at the upper end of the trigger handle; one of the connecting shaft and the driving shaft is slidably mounted inside the slide groove as a relatively sliding shaft, and the other of the connecting shaft and the driving shaft serves as a relatively fixed shaft; The relative sliding shaft can slide along the sliding groove under the action of pressure and be positioned at different positions of the sliding groove according to the magnitude of the pressure value, thereby changing the distance between the driving shaft and the connecting shaft.

[0006] In an optional embodiment, the automatic proportional adjustment module further includes an elastic adjustment mechanism installed on the trigger or the grip, and the elastic adjustment mechanism acts on the relative sliding shaft; The relative sliding shaft can slide along the sliding groove under the action of pressure, overcoming the elastic force of the elastic adjustment mechanism, and can be reset under the action of the elastic restoring force of the elastic adjustment mechanism after the pressure is removed.

[0007] In an optional embodiment, the elastic adjustment mechanism includes an adjustment spring, one end of the adjustment spring is fixed to the trigger handle or the handle, and the other end of the adjustment spring abuts against the side surface of the relative sliding shaft.

[0008] In an optional embodiment, the elastic adjustment mechanism further includes a guide rail seat, which is fixedly connected to the upper end of the handle, and the guide rail seat is provided with a spring mounting groove opening toward the relative sliding axis; the adjustment spring is installed inside the spring mounting groove.

[0009] In an optional embodiment, the handle includes a handle body, the slide groove is provided at the upper end of the handle body, and the adjustment spring is a linear spring, one end of which is installed inside the spring installation groove and the other end abuts against the side of the relative sliding shaft.

[0010] In an optional embodiment, the guide rail seat is provided at the rear side of the connecting shaft and the driving shaft and is located between the connecting shaft and the driving shaft, and the guide rail seat, the connecting shaft and the driving shaft are distributed in a triangular shape; And / or, an installation space is provided inside the handle, and the guide rail seat is provided inside the installation space and fixed to the handle via a fixing member.

[0011] In an optional embodiment, the handle includes a handle body and a rotating seat; The slide groove includes a first slide groove provided on the handle body and a second slide groove provided on the rotating seat; a first limiting hole is further provided on the handle body, and a second limiting hole is further provided on the rotating seat; The relative sliding shaft passes through the second limiting hole and is slidably mounted on the first sliding groove; The relatively fixed shaft passes through the first limiting hole and is slidably mounted on the second sliding groove; The adjustment spring is a linear spring, one end of which is installed inside the spring installation groove and the other end abuts against the side wall of the rotating seat, and its elastic force acts on the relative sliding shaft through the rotating seat; The relative sliding shaft can slide along the first slide groove, and carry the rotating seat to overcome the elastic force of the adjustment spring to rotate around the relative sliding shaft while sliding along the second slide groove relative to the relative fixed shaft, thereby changing the distance between the driving shaft and the connecting shaft.

[0012] In an optional embodiment, an installation space is provided inside the handle, the rotating seat and the guide rail seat are both provided inside the installation space, and the guide rail seat is located below the rotating seat.

[0013] In the second aspect, an embodiment of the present invention provides a glue gun, comprising a push rod, a drive plate and a glue gun handle provided by any optional embodiment of the first aspect; wherein, the push rod is inserted into the mounting hole provided at the upper end of the handle, the drive plate is mounted on the push rod, and the drive shaft abuts against the rear side of the drive plate.

[0014] In the third aspect, an embodiment of the present invention provides another glue gun, which includes a push rod, a drive plate and a glue gun handle provided by any optional embodiment under the condition of "the handle includes a handle body and a rotating seat" in the first aspect; wherein, the push rod is inserted into the mounting hole provided at the upper end of the handle, the drive plate is mounted on the push rod, and the front side of the rotating seat abuts against the rear side of the drive plate.

[0015] In particular, in the embodiment of the present invention, “and / or” indicates that the first feature before “and / or” and the second feature after “and / or” include the following specific setting methods: (1) only the first feature is set, and the second feature is not set; (2) only the second feature is set, and the first feature is not set; (3) the first feature and the second feature are set at the same time.

[0016] Beneficial effects: In the glue gun handle and glue gun provided by the embodiments of the present invention, the automatic proportional adjustment module of the glue gun handle is a linkage control structure that can be adaptively adjusted based on operational feedback. With the "relative fixed axis" as the reference point, the "relative sliding axis" can slide and position in the slide groove in response to the pressure transmitted by the glue cylinder through the drive plate, and automatically adjust the distance between the drive shaft and the connecting shaft according to the viscosity of the colloid, thereby adjusting the lever ratio between the lever and the grip and changing the glue gun drive ratio. The entire process does not require additional manual adjustment by the user, which improves the convenience of the user when operating the glue gun, and can avoid construction quality problems caused by the user forgetting to adjust, thereby improving work efficiency and reliability of construction results (its working principle and specific analysis are described in detail in the specific implementation method section of this application). BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the overall structure of a glue gun handle provided in an optional embodiment of the present invention when applied to a glue gun; Figure 2 for Figure 1 a cross-sectional view of the glue gun handle shown; Figure 3 for Figure 1 Schematic diagram of the exploded structure of the glue gun handle shown; Figure 4 A schematic diagram of the overall structure of a glue gun handle provided by another optional embodiment of the present invention when applied to a glue gun; Figure 5 for Figure 4 a cross-sectional view of the glue gun handle shown; Figure 6 for Figure 4 Schematic diagram of the exploded structure of the glue gun handle shown.

[0019] Icons: 1-handle; 2-handle; 21-handle body; 210-installation space; 211-limiting hole 1; 22-rotating seat; 221-limiting hole 2; 3-connecting shaft; 4-driving shaft; 5-slide; 51-slide 1; 52-slide 2; 6-guide rail seat; 61-spring mounting slot; 62-fixing part; 7-linear spring; 8-push rod; 9-driving plate; 10-connecting nut; 101-driving spring; 102-limiting tube; 103-brake spring; 104-brake pad. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0022] It should be noted that like reference numerals and letters denote similar items in the drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0023] In the description of the present invention, it should be noted that: Unless otherwise specified or limited, the terms "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to fixed, detachable, or integral connections; they may refer to direct connections or indirect connections through an intermediary; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0024] The directions or positional relationships indicated by terms such as "upper", "lower", "front", "back", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0025] The terms "first", "second", "third", etc. are only used to distinguish and describe, and do not indicate the total number, or relative position in time and / or space, and cannot be understood as indicating or implying relative importance.

[0026] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments and the optional embodiments in the embodiments can be combined with each other.

[0027] First, the basic structure of the glue gun is explained. Figures 1 to 6The glue gun usually includes a glue gun handle, a gun body (not shown), a push rod 8, a drive plate 9, a connecting nut 10, a drive spring 101, a limit tube 102, a brake spring 103, a brake plate 104 and other structures. The basic structure of the glue gun handle includes a grip 1, a lever 2 and a connecting shaft 3. The upper end of the lever 2 is rotatably connected to the front side of the grip 1 through the connecting shaft 3; the upper end of the grip 1 is fixed or integrally connected with a top connecting piece, the push rod 8 is installed in the mounting hole of the top connecting piece at the upper end of the grip 1, the rear end of the push rod 8 passes through the through hole provided on the brake plate 104, and the front end of the push rod 8 extends To the inside of the gun body; a driving plate 9 is slidably provided on the push rod 8; the lower end of the driving plate 9 abuts against the front side of the driving part provided at the upper end of the trigger 2, and a driving spring 101 is also sleeved on the push rod 8, and one end of the driving spring 101 abuts against the driving plate 9, and the other end abuts against the connecting nut 10 connected to the rear end of the gun body; a limiting tube 102 is provided inside the top connecting piece at the upper end of the grip 1, and a brake spring 103 is provided between the brake plate 104 and the limiting tube 102, and the brake spring 103 tilts the brake plate 104 so that the push rod 8 is locked in the through hole provided in the brake plate 104.

[0028] It should be noted that the above structure is only one structure of the existing glue gun, which is intended to introduce the basic application principle of the glue gun. In other glue gun structures, the above connecting nut 10 and the limiting tube 102 may not be provided, and local structural improvements can be made with reference to the existing technology.

[0029] During specific use, the brake pad 104 is pressed to extend the brake pad 104 in the vertical direction and thus release the push rod 8. The push rod 8 is pulled to make the front end of the push rod 8 move backward and then the brake pad 104 is released. The rubber cylinder is placed inside the gun body with the glue outlet facing forward. The handle 2 is pulled backward. At this time, the driving part provided at the upper end of the handle 2 can push the driving plate 9 so that the driving plate 9 locks the push rod 8. At the same time, the driving part provided at the upper end of the handle 2 moves forward to drive the push rod 8 to overcome the friction between the perforation of the brake pad 104 and the push rod 8 and move forward, so that the front end of the push rod 8 squeezes the rear end of the rubber cylinder placed inside the gun body, thereby causing the rubber cylinder to discharge glue. The driving plate 9 will compress the driving spring 101 during the process of moving forward. The driving spring 101 makes the driving plate 9 and the handle 2 always have a return movement trend, so that when the handle 2 is released, the driving plate 9 returns to its position and returns to the original position, and this operation is repeated to perform glue application.

[0030] When using a glue gun, the gun's drive ratio (also known as the propulsion ratio) is one of the key parameters that influences its user experience. The distance between the drive unit at the upper end of the trigger 2 and the connecting shaft 3 determines the lever ratio between the trigger 2 and the grip 1, which in turn determines the gun's drive ratio. During use, a larger drive ratio is generally required for high-viscosity colloids, while a smaller drive ratio is required for the opposite.

[0031] In the prior art, the drive ratio (also called propulsion ratio) design of glue guns is mainly divided into two types: one is a glue gun using a single fixed ratio. Although this design is simple in structure and easy to operate, it cannot adapt to the needs of colloids with different viscosities and different construction scenarios; the other is a glue gun equipped with two ratios and a ratio conversion module. However, the ratio conversion modules equipped with this type of glue guns in the prior art all require manual adjustment to switch the ratio mode. Although this design expands the usage scenarios to a certain extent, since the user is required to manually switch the ratio mode before use, it not only affects work efficiency, but is also particularly inconvenient in construction environments that require frequent switching of the drive ratio. It not only increases the complexity of operation, but is also prone to construction quality problems due to forgetting to adjust.

[0032] In contrast, the following embodiments of the present application provide a new glue gun handle and glue gun to solve the above technical problems: First aspect The present embodiment provides a glue gun handle, which includes a grip 1, a trigger 2, and a connecting shaft 3. The upper end of the trigger 2 is rotatably connected to the front side of the grip 1 via the connecting shaft 3. In particular, the glue gun handle also includes an automatic proportional adjustment module, which includes a drive shaft 4 and a slide 5. Specifically, the drive shaft 4 is installed at the upper end of the trigger 2 and is used to act on the drive plate 9 of the glue gun in the assembled state; the slide 5 is provided at the upper end of the trigger 2; one of the connecting shaft 3 and the drive shaft 4 is slidably installed inside the slide 5 as a relative sliding shaft, and the other of the connecting shaft 3 and the drive shaft 4 serves as a relatively fixed shaft; the relative sliding shaft can slide along the slide 5 under the action of pressure and be positioned at different positions in the slide 5 according to the magnitude of the pressure, thereby changing the distance between the drive shaft 4 and the connecting shaft 3.

[0033] In this embodiment, the “relative sliding axis” and “relative fixed axis” are named for the relative movement between the drive shaft 4 and the connecting shaft 3, including the following two situations: (1) During use, the connecting shaft 3 is stationary relative to the drive shaft 4, and the drive shaft 4 is assembled in the slide groove 5. When the drive shaft 4 is subjected to pressure, it can act as a “relative sliding axis” and slide along the slide groove 5 relative to the connecting shaft 3, thereby changing the distance between the drive shaft 4 and the connecting shaft 3; (2) During use, the drive shaft 4 is stationary relative to the connecting shaft 3, and the connecting shaft 3 is assembled in the slide groove 5. When the drive shaft 4 is subjected to pressure, the pressure is transmitted to the connecting shaft 3 through the lever 2. The connecting shaft 3 can act as a “relative sliding axis” and slide along the slide groove 5 relative to the drive shaft 4, thereby changing the distance between the drive shaft 4 and the connecting shaft 3.

[0034] In this embodiment, a chute 5 is provided at the upper end of the trigger 2 to guide the "relative sliding axis" to slide in a set direction. A drive shaft 4 is mounted on the upper end of the trigger 2 and, in the assembled state, acts on the drive plate 9 of the glue gun (i.e., to trigger glue discharge from the glue cartridge). The connecting shaft 3 serves as the rotational connection between the trigger 2 and the grip 1, forming the basic fulcrum of the glue gun handle. During operation: In the initial state, the "relative sliding axis" is in a default position within the chute 5, and the drive shaft 4 and the connecting shaft 3 maintain a standard spacing corresponding to a standard drive ratio. During operation, when the user presses the trigger 2, the drive shaft 4 is affected by the reverse force of the drive plate 9, generating pressure. Under the action of this pressure, the "relative sliding axis" slides along the chute 5 and is positioned at different positions in the chute 5 according to the magnitude of the pressure, thereby changing the distance between the drive shaft 4 and the connecting shaft 3. This distance change changes the lever ratio between the trigger 2 and the grip 1, thereby achieving automatic proportional adjustment of the glue discharge amount and thrust.

[0035] In the above-mentioned glue gun handle provided in this embodiment, the design of the automatic proportional adjustment module is a linkage control structure that can be adaptively adjusted based on operational feedback. With the "relative fixed axis" as the reference point, the "relative sliding axis" can slide and position in the slide groove 5 in response to the pressure transmitted by the glue cylinder through the drive plate 9, and automatically adjust the distance between the drive shaft 4 and the connecting shaft 3 according to the viscosity of the colloid, thereby adjusting the lever ratio between the lever 2 and the grip 1 and changing the glue gun drive ratio. The whole process does not require the user to perform additional manual adjustment, which improves the convenience of the user in operating the glue gun, and can avoid construction quality problems caused by the user forgetting to adjust, thereby improving work efficiency and reliability of construction results.

[0036] In this embodiment, there are multiple ways for the "relative sliding shaft" to slide and position in the slide groove 5 in response to the pressure transmitted by the rubber cylinder via the driving plate, including but not limited to: In some optional embodiments, a friction fit relationship can be established between the "relative sliding axis" and the slide groove 5 in which it is located. Initially, the distance between the drive shaft 4 and the connecting shaft 3 is relatively far. When the pressure value transmitted to the "relative sliding axis" by the rubber cylinder through the drive plate 9 is greater than the friction force between the "relative sliding axis" and the inner wall of the slide groove 5, the "relative sliding axis" can slide relative to the slide groove 5, reducing the distance between the drive shaft 4 and the connecting shaft 3. After completing the glue discharge task, as the trigger 2 is reset relative to the grip 1, the "relative sliding axis" follows the reset, or, after the trigger 2 is reset relative to the grip 1, the "relative sliding axis" is manually reset.

[0037] In some optional embodiments, the slide groove 5 can be designed as a groove body with inconsistent diameters at different locations to provide multiple limiting parts that can block the "relative sliding axis". Initially, the distance between the drive shaft 4 and the connecting shaft 3 is relatively far. When the pressure value transmitted to the "relative sliding axis" by the rubber cylinder through the drive plate 9 increases, the "relative sliding axis" can slide relative to the slide groove 5 to a certain limiting part, reducing the distance between the drive shaft 4 and the connecting shaft 3. After completing the glue discharge task, as the handle 2 is reset relative to the grip 1, the "relative sliding axis" follows the reset, or, after the handle 2 is reset relative to the grip 1, the "relative sliding axis" is manually reset.

[0038] The two structures provided by the above two optional embodiments can be designed separately on a glue gun handle or combined into the same glue gun handle. The "relative sliding axis" responds to the pressure transmitted by the glue cylinder through the driving plate 9 to slide and position in the slide groove 5. There is no need to position the "relative sliding axis" in advance according to the viscosity of the colloid. Instead, during use, the "relative sliding axis" automatically adjusts and positions itself in response to the pressure transmitted by the glue cylinder through the driving plate, which is more convenient to use.

[0039] However, in this embodiment, the manner in which the "relative sliding shaft" slides and positions itself in the chute 5 in response to the pressure transmitted by the rubber cylinder via the drive plate is not limited to the two optional embodiments described above. For example, the applicant has also designed another optional structure that does not require the "relative sliding shaft" to be positioned in advance according to the viscosity of the colloid, while also ensuring that the "relative sliding shaft" automatically resets after completing the glue discharge task. In this optional embodiment, specifically: the automatic proportional adjustment module includes, in addition to the drive shaft 4 and the chute 5, an elastic adjustment mechanism mounted on the trigger 2 or the grip 1, and the elastic adjustment mechanism acts on the "relative sliding shaft"; the "relative sliding shaft" can overcome the elastic force of the elastic adjustment mechanism and slide along the chute 5 in which it is located under the pressure transmitted by the rubber cylinder via the drive plate 9, and reset under the elastic restoring force of the elastic adjustment mechanism after the pressure is removed.

[0040] In the above structure, the displacement of the "relative sliding axis" within the chute 5 is controlled by an elastic adjustment mechanism. Initially, the "relative sliding axis" is in its default position within the chute 5, with the elastic adjustment mechanism applying a preload. This maintains a standard spacing between the drive shaft 4 and the connecting shaft 3, corresponding to a standard drive ratio. During operation, when the user presses the handle 2, the drive shaft 4 is affected by the reverse force of the drive plate 9, generating pressure. If this pressure exceeds the elastic force applied to the "relative sliding axis" by the elastic adjustment mechanism, the "relative sliding axis" will slide along the chute 5 until it reaches a position where the pressure and the elastic force are equal, changing the distance between the drive shaft 4 and the connecting shaft 3 and achieving automatic proportional adjustment of the glue output and thrust. After glue is discharged, the rebound force (elastic recovery force) of the elastic adjustment mechanism pushes the "relative sliding axis" back to its original position, returning the glue gun to its initial drive ratio.

[0041] Optionally, the elastic adjustment mechanism includes an adjustment spring, one end of which is fixed to the trigger 2 or the grip 1, and the other end of which abuts against the side of the "relative sliding axis". To improve assembly stability, in this embodiment, optionally, the elastic adjustment mechanism also includes a guide rail seat 6, which is fixedly connected to the upper end of the trigger 2, and is provided with a spring mounting groove 61 opening toward the "relative sliding axis" on the guide rail seat 6; the adjustment spring is installed inside the spring mounting groove 61. In this optional embodiment, the guide rail seat 6 is fixedly connected to the upper end of the trigger 2, carries the adjustment spring and provides guide support; the adjustment spring provides elastic force to keep the "relative sliding axis" in the default position, and when the external force overcomes the spring force, the "relative sliding axis" is allowed to slide along the slide groove 5.

[0042] Alternatively, the aforementioned slideway 5 may be a long through-hole structure, with the "relative sliding shaft" inserted through this long through-hole structure, and limiter head structures provided at each end of the shaft to ensure linkage reliability. Optionally, a mounting space 210 is provided within the trigger handle 2, and the guide rail seat 6 is disposed within this mounting space 210 and secured to the trigger handle 2 via a pin, bolt assembly, or other fastener 62. The spring mounting slot 61 provided on the guide rail seat 6 is preferably, but not limited to, a blind hole structure to prevent the adjustment spring from slipping out of the spring mounting slot 61 and ensure that the adjustment spring compresses or rebounds along a predetermined path.

[0043] In this embodiment, the adjustment spring may be a torsion spring or a linear spring or may be arranged in other forms. Taking the adjustment spring as a linear spring as an example, at least two more specific implementations are provided below: In some specific embodiments, such as Figures 1 to 3 As shown, the handle 2 includes a handle body 21, a slide groove 5 disposed at the upper end of the handle body 21, and a linear spring 7, one end of which is mounted within the spring mounting groove 61 and the other end of which abuts the side of the "relative sliding axis." In this embodiment, the slide groove 5 is directly disposed on the handle body 21, which simplifies the structure and facilitates manufacturing.

[0044] At this time, the "relative sliding axis" can be the driving axis 4 and the "relative fixed axis" can be the connecting axis 3; or the "relative sliding axis" can be the connecting axis 3 and the "relative fixed axis" can be the driving axis 4.

[0045] Figures 1 to 3In the illustrated structure, the drive shaft 4 acts as a "relatively sliding axis" and the connecting shaft 3 acts as a "relatively fixed axis." Under this structure, during the gluing operation, the lever 2 rotates about the connecting shaft 3, and the adjustment spring in the automatic proportional adjustment module pushes the drive shaft 4, which in turn pushes the drive plate 9. The drive plate 9 and the push rod 8 self-lock, and the push rod 8 squeezes the colloid, completing the gluing. When the viscosity of the colloid is high, the force applied to the push rod 8 by the rubber cylinder is large, and the push rod 8 cannot move forward. At this time, the drive shaft 4 is subjected to increased pressure from the drive plate 9. Under this pressure, the drive shaft 4 moves along the slide 5 and compresses the adjustment spring, reducing the distance between the drive shaft 4 and the connecting shaft 3. The leverage ratio between the lever 2 and the grip 1 increases, and the drive plate 9 then drives the push rod 8 forward, completing the gluing.

[0046] When the connecting shaft 3 acts as a "relative sliding shaft" and the driving shaft 4 acts as a "relative fixed shaft", under this structure, during the gluing operation, the lever 2 rotates around the connecting shaft 3, and the adjustment spring in the automatic proportional adjustment module pushes the driving shaft 4, which in turn pushes the driving plate 9. The driving plate 9 and the push rod 8 are self-locking, and the push rod 8 squeezes the colloid to complete the gluing. When the viscosity of the colloid is relatively high, the push rod 8 cannot move forward due to the large force applied by the rubber cylinder to the push rod 8. At this time, the driving shaft 4 is subjected to increased pressure from the driving plate 9, which is transmitted to the lever 2 and then to the connecting shaft 3. Under this pressure, the connecting shaft 3 moves along the slide groove 5 and compresses the adjustment spring, reducing the distance between the driving shaft 4 and the connecting shaft 3. The lever ratio between the lever 2 and the grip 1 increases, and then the driving plate 9 drives the push rod 8 forward to complete the gluing.

[0047] When the viscosity of the colloid is different, the drive shaft 4 is subjected to different reaction forces from the drive plate 9. The driving force that the adjustment spring needs to provide to the drive shaft 4 is different. Accordingly, the expansion and contraction amount of the adjustment spring changes adaptively, the movement length of the drive shaft 4 along the slide groove 5 is different, the distance between the drive shaft 4 and the connecting shaft 3 is different, and the lever ratio between the trigger 2 and the grip 1 is different, that is, the glue gun drive ratio is different, thereby realizing automatic adjustment of the glue gun drive ratio for different colloid viscosities.

[0048] Among them, in order to make the structure more stable and reliable, it is preferred but not limited to, Figures 1 to 3 As shown, further, the guide rail seat 6 is arranged at the rear side of the connecting shaft 3 and the driving shaft 4 and is located between the connecting shaft 3 and the driving shaft 4. The guide rail seat 6, the connecting shaft 3 and the driving shaft 4 are distributed in a triangle to improve stable and reliable linkage.

[0049] In some other specific implementations of this embodiment, Figures 4 to 6As shown, the handle 2 includes a handle body 21 and a rotating seat 22; the slide groove 5 includes a slide groove 1 51 provided on the handle body 21 and a slide groove 2 52 provided on the rotating seat 22; a limiting hole 1 211 is also provided on the handle body 21, and a limiting hole 221 is also provided on the rotating seat 22; the "relative sliding axis" passes through the limiting hole 221 and is slidably installed in the slide groove 1 51; the "relative fixed axis" passes through the limiting hole 1 211 and is slidably installed in the slide groove 2 52; the adjusting spring is a linear spring 7, one end of which is installed inside the spring mounting groove 61 and the other end abuts against the side wall of the rotating seat 22, and its elastic force acts on the "relative sliding axis" through the rotating seat 22; the "relative sliding axis" can slide along the slide groove 1 51, and carry the rotating seat 22 to overcome the elastic force of the adjusting spring while rotating around the "relative sliding axis" and sliding along the slide groove 2 52 relative to the "relative fixed axis", thereby changing the distance between the drive shaft 4 and the connecting shaft 3.

[0050] At this time, the "relative sliding axis" can be the driving axis 4 and the "relative fixed axis" can be the connecting axis 3; or the "relative sliding axis" can be the connecting axis 3 and the "relative fixed axis" can be the driving axis 4. Figures 4 to 6 In the structure shown, the drive shaft 4 acts as a "relative sliding shaft" and the connecting shaft 3 acts as a "relative fixed shaft"; under this structure, during the gluing operation, the lever 2 rotates around the connecting shaft 3, and the adjustment spring in the automatic proportional adjustment module pushes the drive shaft 4, and the drive shaft 4 pushes the drive plate 9. The drive plate 9 and the push rod 8 are self-locked, and the push rod 8 squeezes the colloid to complete the gluing. Because the force applied by the rubber cylinder to the push rod 8 is relatively large, the push rod 8 cannot move forward. At this time, the drive shaft 4 is subjected to increased pressure from the drive plate 9. The drive shaft 4 moves along the slide groove 1 51 under this pressure, and at the same time, it rotates around the connecting shaft 3 with the rotating seat 22 while sliding relative to the connecting shaft 3 along the slide groove 2 52, and compresses the adjustment spring. The distance between the drive shaft 4 and the connecting shaft 3 is reduced, and the leverage ratio of the lever 2 and the grip 1 is increased. Then the drive plate 9 drives the push rod 8 forward to complete the gluing. In this specific embodiment, in order to make the structure more stable and reliable, it is preferably, but not limited to, Figures 4 to 6 As shown, further, an installation space 210 is provided inside the handle 2 , and the rotating seat 22 and the guide rail seat 6 are both provided inside the installation space 210 , and the guide rail seat 6 is located below the rotating seat 22 .

[0051] Second aspect This embodiment provides a glue gun, including a push rod 8, a drive plate 9 and a glue gun handle provided by any optional embodiment of the first aspect; wherein, the push rod 8 is inserted into the mounting hole provided at the upper end of the handle 1, the drive plate 9 is sleeved on the push rod 8, and the drive shaft 4 abuts against the rear side of the drive plate 9. Its specific structure refers to the introduction and description of the first aspect and its prior art.

[0052] The third aspect This embodiment provides another glue gun, which includes a push rod 8, a driving plate 9 and a glue gun handle provided by an optional embodiment of the first aspect of "the handle 2 includes a handle body 21 and a rotating seat 22"; wherein, the push rod 8 is inserted into the mounting hole provided at the upper end of the handle 1, the driving plate 9 is mounted on the push rod 8, and the front side of the rotating seat 22 abuts against the rear side of the driving plate 9. Its specific structure refers to the introduction and description of the first aspect and its prior art.

[0053] Finally, it should be noted that: 1. In this specification, when one component is "below" another component, for example, "the guide rail seat 6 is below the rotating seat 22", it is only a description of the general relationship between the two components in space, and does not mean that one component must be directly below the other. In other words, the two components can also be arranged diagonally in an alternating manner in the vertical direction, as long as the two components meet the vertical positional relationship. 2. The above embodiments and their optional implementation modes in this specification are only used to illustrate the technical solutions of this embodiment, rather than to limit it. Although this embodiment has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above optional implementation modes, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this embodiment. In addition, it is emphasized again that the features of the embodiments and the optional implementation modes in the embodiments in this specification can be combined with each other unless there is a conflict.

Claims

1. A glue gun handle, comprising a grip (1), a trigger (2) and a connecting shaft (3), wherein the upper end of the trigger (2) is rotatably connected to the front side of the grip (1) via the connecting shaft (3); characterized in that: The glue gun handle also includes an automatic proportional adjustment module; the automatic proportional adjustment module includes: A drive shaft (4) is mounted on the upper end of the handle (2) and is used to act on the drive plate (9) of the glue gun in the assembled state; A slide groove (5) is provided at the upper end of the handle (2); one of the connecting shaft (3) and the driving shaft (4) is slidably mounted inside the slide groove (5) as a relatively sliding shaft, and the other of the connecting shaft (3) and the driving shaft (4) serves as a relatively fixed shaft; The relative sliding shaft can slide along the slide groove (5) under the action of pressure and be positioned at different positions of the slide groove (5) according to the magnitude of the pressure value, thereby changing the distance between the drive shaft (4) and the connecting shaft (3).

2. The glue gun handle according to claim 1, characterized in that: The automatic proportional adjustment module further comprises an elastic adjustment mechanism installed on the trigger (2) or the grip (1), and the elastic adjustment mechanism acts on the relative sliding shaft; The relative sliding shaft can slide along the sliding groove (5) under the action of pressure, overcoming the elastic force of the elastic adjustment mechanism, and can be reset under the action of the elastic restoring force of the elastic adjustment mechanism after the pressure is removed.

3. The glue gun handle according to claim 2, characterized in that: The elastic adjustment mechanism comprises an adjustment spring, one end of the adjustment spring is fixed to the trigger handle (2) or the grip (1), and the other end of the adjustment spring abuts against the side surface of the relative sliding shaft.

4. The glue gun handle according to claim 3, characterized in that: The elastic adjustment mechanism further comprises a guide rail seat (6), the guide rail seat (6) being fixedly connected to the upper end of the trigger handle (2), and the guide rail seat (6) being provided with a spring mounting groove (61) opening toward the relative sliding axis; the adjustment spring is mounted inside the spring mounting groove (61).

5. The glue gun handle according to claim 4, characterized in that: The lever (2) comprises a lever body (21), the slide groove (5) is provided at the upper end of the lever body (21), and the adjustment spring is a linear spring (7), one end of which is installed inside the spring installation groove (61) and the other end is in contact with the side surface of the relative sliding shaft.

6. The glue gun handle according to claim 5, characterized in that: The guide rail seat (6) is arranged at the rear side of the connecting shaft (3) and the driving shaft (4) and is located between the connecting shaft (3) and the driving shaft (4); the guide rail seat (6), the connecting shaft (3) and the driving shaft (4) are distributed in a triangular shape; And / or, an installation space (210) is provided inside the handle (2), and the guide rail seat (6) is provided inside the installation space (210) and fixedly mounted on the handle (2) via a fixing member (62).

7. The glue gun handle according to claim 4, characterized in that: The handle (2) comprises a handle body (21) and a rotating seat (22); The slide groove (5) includes a first slide groove (51) provided on the handle body (21) and a second slide groove (52) provided on the rotating seat (22); a first limiting hole (211) is further provided on the handle body (21), and a second limiting hole (221) is further provided on the rotating seat (22); The relative sliding shaft passes through the second limiting hole (221) and is slidably mounted on the first sliding groove (51); The relatively fixed shaft passes through the first limiting hole (211) and is slidably mounted on the second sliding groove (52); The regulating spring is a linear spring (7), one end of which is installed inside the spring installation groove (61) and the other end is in contact with the side wall of the rotating seat (22), and its elastic force acts on the relative sliding shaft through the rotating seat (22); The relative sliding shaft can slide along the first slide groove (51), and can carry the rotating seat (22) to overcome the elastic force of the adjustment spring while rotating around the relative sliding shaft and sliding along the second slide groove (52) relative to the relative fixed shaft, thereby changing the distance between the driving shaft (4) and the connecting shaft (3).

8. The glue gun handle according to claim 7, characterized in that: An installation space (210) is provided inside the handle (2), the rotating seat (22) and the guide rail seat (6) are both provided inside the installation space (210), and the guide rail seat (6) is located below the rotating seat (22).

9. A glue gun, characterized in that: Comprising a push rod (8), a drive plate (9) and a glue gun handle according to any one of claims 1 to 8; The push rod (8) is inserted into the mounting hole provided at the upper end of the handle (1), the drive plate (9) is sleeved on the push rod (8), and the drive shaft (4) abuts against the rear side of the drive plate (9).

10. A glue gun, characterized in that: It comprises a push rod (8), a driving plate (9) and the glue gun handle according to claim 7 or 8; The push rod (8) is inserted into the mounting hole provided at the upper end of the handle (1), the drive plate (9) is sleeved on the push rod (8), and the front side of the rotating seat (22) abuts against the rear side of the drive plate (9).

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