Easily-assembled thermal shrinkage gun

Abstract

The utility model discloses an easily assembled thermal shrinkage gun, which comprises a handle assembly and a venturi tube assembly, the venturi tube assembly is arranged on the handle assembly, in the scheme, the structure that two tube bodies in the venturi tube assembly are butted and locked is improved, and after the tube body I and the tube body II are sleeved and correspond to each other through holes, the venturi tube assembly can be assembled easily. The first pipe body and the second pipe body can be locked by penetrating the end of the lock column through the through hole and stretching into the groove, locking can be unlocked by pulling the lock column outwards in the disassembling process, and assembling and disassembling are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of heat drying devices, in particular to an easily assembled heat shrink gun. Background Art

[0002] Heat shrink guns are widely used in fields such as packaging. When in use, first wrap a heat shrink film around an object, and then use a heat shrink gun to heat the film. The film will shrink and tightly adhere to the surface of the object. Heat shrink guns include electric heating and gas heating types. Taking the gas heating type as an example, a common heat shrink gun is in the shape of a pistol. A Venturi tube assembly is installed on the pistol-shaped grip, and a combustion nozzle, a mask, an igniter, etc. are installed at the end of the Venturi tube assembly. Operating the trigger on the grip controls intake air and ignition, etc. The Venturi tube assembly is generally formed by butt-jointing two pipe bodies at both ends, and bolts are required for fastening at the butt-joint of the pipe bodies. The installation and disassembly are inconvenient and need to be improved. Content of the Utility Model

[0003] To solve the above at least one technical defect, the utility model provides the following technical solutions:

[0004] This application document discloses an easily assembled heat shrink gun, which includes a handle assembly and a Venturi tube assembly. The Venturi tube assembly is arranged on the handle assembly. The Venturi tube assembly includes a first tube body and a second tube body connected to each other. The tail end of the second tube body at the rear has a flared mouth. The second tube body and the first tube body are sleeved at the end, and the sleeved position is locked by a fastening mechanism. The fastening mechanism includes a bracket and a locking post. The bracket is arranged on the first tube body or the second tube body, and the locking post is elastically telescopically connected to the bracket. A through hole is formed in the outer peripheral pipe wall at the sleeved position, and a groove is arranged at the inner peripheral pipe wall corresponding to the through hole. Under the push of elastic force, the end of the locking post passes through the through hole and extends into the groove to lock the first tube body and the second tube body.

[0005] In this solution, the structure of butt-joint locking of the two tube bodies in the Venturi tube assembly is improved. The first tube body and the second tube body are sleeved. After the through holes are aligned, the end of the locking post passes through the through hole and extends into the groove to complete the locking of the first tube body and the second tube body. When disassembling, pulling out the locking post externally can release the locking. The assembly and disassembly are convenient.

[0006] Further, a guiding hole is arranged on the bracket, and the locking post is guidingly slidably connected to the guiding hole. An elastic member is arranged between the locking post and the bracket to form an elastic telescopic connection. The locking post and the guiding hole cooperate to guide the movement, improving the running stability. The locking post is elastically connected through the elastic member. The configuration has a simple structure and is convenient for assembly.

[0007] Further, the elastic member is a spring. The spring is sleeved on the locking post. A shoulder is arranged on the column body of the locking post. The bottom end of the spring abuts against the shoulder, and the top end abuts against the bracket, which is convenient for assembly and forming.

[0008] Further, the bracket is L-shaped. The longitudinal end of the bracket is fixed on the second pipe body, and a guiding hole is arranged at the transverse end of the bracket to facilitate the docking of the docking lock post.

[0009] Further, the handle assembly includes a pistol-shaped grip having a trigger, and a Venturi tube assembly is horizontally arranged at the top surface of the grip to facilitate operation.

[0010] Further, a pull ring is arranged at the end of the lock post protruding outside the top surface of the bracket, and the pull ring is applied with force to facilitate the external extraction of the lock post.

[0011] Further, a sealing ring is arranged at the peripheral wall of the end of the second pipe body extending into the orifice of the first pipe body to improve the sealing performance.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The present utility model improves the structural composition of the Venturi tube assembly in the heat shrink gun. After the first pipe body and the second pipe body are sleeved, they can be locked by the cooperation of the lock post and the through hole, which is convenient for assembly and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 is a schematic structural diagram of the easily assembled heat shrink gun in Embodiment 1;

[0016] Figure 2 is a schematic connection structural diagram of the lock post and the bracket;

[0017] Among them, the reference numerals are:

[0018] 1. Handle assembly; 2. Venturi tube assembly; 3. Fastening mechanism; 4. Combustion nozzle; 5. Face mask; 6. Ignition mechanism; 10. Grip; 11. Trigger; 21. First pipe body; 22. Second pipe body; 23. Sealing ring; 31. Pull ring; 32. Bracket; 33. Spring; 34. Lock post; 35. Shoulder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will further illustrate the present utility model with reference to the drawings and specific embodiments.

[0020] Embodiment 1

[0021] As Figure 1 , Figure 2As shown in the figure, in this example, the easy-to-assemble heat shrink gun includes a handle assembly 1 and a Venturi tube assembly 2. The handle assembly adopts a conventional structure, including a pistol-shaped grip 10 and a trigger 11. The Venturi tube assembly 2 is horizontally installed at the top surface of the grip 10, the trigger 11 is installed on one side of the grip 10, and a valve and a corresponding intake pipe are installed in the cavity of the grip 10. A combustion nozzle 4 is installed at the end of the Venturi tube assembly 2, and an igniter mechanism 6 communicating with the cavity is installed at the combustion nozzle 4. The trigger 11 is connected to the igniter mechanism 6 and so on.

[0022] The Venturi tube assembly 2 includes a first tube body 21 and a second tube body 22 connected to each other. The tail end of the second tube body 22 at the rear has a flared mouth. An intake nozzle is installed at the corresponding end of the grip 10, and the intake nozzle is connected to a valve and so on in the cavity of the grip. An impeller is installed in the cavity of the first tube body at the front, that is, multiple conical blades are distributed in a ring shape, and gas flows through the spaces between the blades and the enclosed holes. The above are all composed of conventional structures and will not be elaborated here.

[0023] In this example, the key improvement is the docking structure between the second tube body and the first tube body. The second tube body 22 and the first tube body 21 are sleeved at the end, and the sleeved part is locked by a fastening mechanism 3.

[0024] Specifically, the fastening mechanism 3 includes a bracket 32 and a locking post 34. The bracket 32 is L-shaped, and the longitudinal end of the bracket 32 is welded and fixed to the second tube body 22 at the rear. The locking post 34 is elastically telescopically connected to the bracket 32. In Figure 1 、 Figure 2 In the shown state, the locking post 34 elastically expands and contracts longitudinally. A guiding hole is formed longitudinally at the transverse end of the bracket 32. The tail end of the locking post 34 passes through the guiding hole and has a clearance fit, and the movement of the locking post is guided by the guiding hole. Below the locking post 34 is the sleeved part of the first tube body 21 and the second tube body 22.

[0025] In this example, the front end of the second tube body 22 at the rear is inserted into the cavity at the tail end of the first tube body 21 at the front. At the sleeved position, the tube wall of the first tube body 21 is on the outer periphery. A through hole is formed in the tube wall of the first tube body 21 corresponding to the locking post, and a groove is formed in the peripheral wall of the second tube body 22 corresponding to the through hole. After the second tube body 22 and the first tube body 21 are sleeved, the tail end of the locking post 34 passes through the through hole and extends into the groove to lock the first tube body 21 and the second tube body 22 into one body. When disassembly is required, pull out the locking post to disengage it from the through hole, and then separate the first tube body and the second tube body relatively.

[0026] In this example, an elastic member is installed between the locking post 34 and the bracket 32 to form an elastic telescopic connection. The elastic member is, for example, a spring 33. The spring 33 is sleeved on the locking post 34. A shoulder 35 is formed by outward convex molding on the column body of the locking post 34. The bottom end of the spring 33 abuts against the shoulder 35 and its top end abuts against the bottom surface of the transverse end of the bracket 32. Under normal conditions, the elastic force of the spring 33 causes the locking post 34 to move downward to the position where the groove is located. When the first pipe body and the second pipe body are butted, the locking post is moved upward, the first pipe body and the second pipe body are sleeved together, and after the external force is removed, the locking post moves downward under the push of the elastic force of the spring. The tail end of the locking post passes through the through hole and extends into the groove.

[0027] To facilitate the movement of the locking post, a pull ring 31 is installed at the end of the locking post that protrudes outward from the top surface of the transverse end of the bracket 32. Applying force to the pull ring can pull the locking post.

[0028] In addition, to improve the sealing performance, two sealing rings 23 are arranged at intervals on the peripheral wall of the head end of the second pipe body 22. When extending into the cavity opening of the first pipe body, the sealing rings abut against the cavity wall of the first pipe body to improve the sealing performance.

[0029] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as within the protection scope of the present invention.

Claims

1. An easy-to-assemble heat shrink gun, comprising a handle assembly (1) and a venturi tube assembly (2), wherein the handle assembly (1) is provided with the venturi tube assembly (2), wherein the venturi tube assembly (2) comprises a first tube body (21) and a second tube body (22) connected to each other, wherein the rear end of the second tube body (22) at the rear has a trumpet-shaped mouth, and wherein: The second tube body (22) and the first tube body (21) are fitted together at the end and locked at the fitting position by a fastening mechanism (3). The fastening mechanism (3) comprises a bracket (32) and a locking column (34). The bracket (32) is arranged on the first tube body or the second tube body (22) and the locking column (34) is elastically and telescopically connected to the bracket (32). The fitting position is located at a through hole formed on the outer tube wall and a groove is arranged on the inner tube wall corresponding to the through hole. Under the push of elastic force, the end of the locking column (34) passes through the through hole and extends into the groove to lock the first tube body and the second tube body.

2. The easy-to-assemble heat shrink gun according to claim 1, characterized in that: A guide hole is provided on the bracket (32), the locking column (34) is connected to the guide hole in a guiding and sliding manner, and an elastic member is provided between the locking column (34) and the bracket (32) to form an elastic telescopic connection.

3. The easy-to-assemble heat shrink gun according to claim 2, characterized in that: The elastic member is a spring (33), which is sleeved on a locking column (34). A boss (35) is provided on the body of the locking column (34), and the bottom end of the spring (33) abuts against the boss (35) and the top end abuts against the bracket (32).

4. The easy-to-assemble heat shrink gun according to claim 2, characterized in that: The bracket (32) is L-shaped, the longitudinal end of the bracket (32) is fixed on the second tube body (22), and a guide hole is arranged at the transverse end of the bracket (32).

5. The easy-to-assemble heat shrink gun according to claim 4, characterized in that: The handle assembly (1) comprises a pistol-type grip (10) having a trigger (11), and a venturi tube assembly (2) is horizontally arranged on the top surface of the grip (10).

6. The easy-to-assemble heat shrink gun according to claim 1, characterized in that: A pull ring (31) is arranged at the end of the lock column (34) protruding outside the top surface of the bracket (32).

7. The easy-to-assemble heat shrink gun according to claim 1, characterized in that: A sealing ring (23) is provided at the peripheral wall of the end of the second tube body (22) extending into the cavity of the first tube body (21).

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