Pressure glue gun for building construction

Abstract

The application relates to a glue pressing gun for building construction, which is applied to the field of building decoration tools and comprises a glue pressing gun body, a glue cylinder pressing ring arranged in a gun seat clamping groove of the glue pressing gun body, the glue cylinder pressing ring being capable of moving along the length direction of the gun seat clamping groove, an outer ring of the glue cylinder pressing ring being provided with a pair of force applying blocks, the pair of force applying blocks being symmetrically distributed around the center of the glue cylinder pressing ring, a pair of sliding holes being arranged on the side wall of the gun seat clamping groove and arranged along the length direction of the gun seat clamping groove, the force applying blocks and the sliding holes being correspondingly arranged, the force applying blocks penetrating through the corresponding sliding holes and extending out of the gun seat clamping groove, a pair of fixing blocks being arranged on the outer wall of the gun seat clamping groove and correspondingly arranged with the force applying blocks, and a pressing spring being connected between the fixing blocks and the force applying blocks and enabling the glue cylinder pressing ring to press against the rear end wall of the glue cylinder to fix the glue cylinder under the action of the pulling force of the pressing spring. The glue cylinder pressing ring of the application presses against the rear end wall of the glue cylinder to fix the glue cylinder, so that the glue pressing gun can be stably used.

Description

Technical Field

[0001] This application relates to the field of building decoration tools, and in particular to a caulking gun for building construction. Background Technology

[0002] A caulking gun is a tool for sealing and filling gaps with sealant (usually silicone sealant). It is widely used in the field of building decoration. Caulking guns are usually used with a glue cartridge (the silicone sealant is filled in the cartridge). It can easily squeeze the silicone sealant from the cartridge out of the nozzle. It has the advantages of being small in size, easy to operate, convenient to use and carry.

[0003] When using it, it can be combined with Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a caulking gun before the glue cartridge is installed, in the prior art. Figure 2 This is a schematic diagram of a caulking gun after the glue cartridge is installed. First, the glue head at the front end of the glue cartridge 1 is cut off. Then, the nozzle 2 is installed on the glue head. The nozzle 2 is cut at a 45° angle with a knife. Press down the push rod pressure plate 32 at the rear end of the caulking gun and pull the central push rod 33 in the caulking gun backward. Then, the glue cartridge 1 is installed into the gun holder slot 31 of the caulking gun. Then, the central push rod 33 is pushed forward so that the push rod disc 34 at the front end of the central push rod 33 enters the glue cartridge 1 and presses the silicone sealant. This process also fixes the glue cartridge 1 in the gun holder slot 31. By holding the handle 35 and repeatedly pressing the push trigger 36, the author can squeeze the silicone sealant in the glue cylinder 1 and expel it from the nozzle 2, thus realizing the operation of filling gaps and applying sealant in construction. It should be noted that each press of the push trigger 36 is one stroke of squeezing silicone sealant. After each release of the push trigger 36, the central push rod 33 and the push rod disc 34 will automatically retract by nearly 2mm to achieve automatic sealant cut-off after each stroke, so as to prevent silicone sealant from continuously flowing out of the nozzle 2 under continuous pressure, causing silicone sealant waste and difficulty in cleaning.

[0004] However, in actual use, the specifications of the glue cartridge may not be well matched with the size of the gun holder slot. That is, the length of the glue cartridge is shorter than the length of the gun holder slot. When the glue cartridge is placed in the gun holder slot, it is fixed by the push rod disc at the front end of the central push rod pressing the glass glue. However, after each stroke of the glass glue is pressed, the central push rod and the push rod disc automatically retract, and the glue cartridge will lose its fixation. It is easy for the glue cartridge to shift and shake in the gun holder slot, making the glue cartridge unstable and affecting the use of the glue gun. Summary of the Invention

[0005] To overcome the aforementioned deficiencies, this application provides a caulking gun for building construction.

[0006] The technical solution provided in this application for a caulking gun used in building construction is as follows:

[0007] A caulking gun for construction includes a caulking gun body. A cartridge pressure ring is provided in the gun holder groove of the caulking gun body. The cartridge pressure ring can move along the length of the gun holder groove. A pair of force-applying blocks are provided on the outer ring of the cartridge pressure ring, symmetrically distributed around the center of the cartridge pressure ring. A pair of sliding holes are provided on the side wall of the gun holder groove, arranged along the length of the gun holder groove. The force-applying blocks and the sliding holes are correspondingly arranged, passing through the corresponding sliding holes and extending out of the gun holder groove. A pair of fixing blocks are provided on the outer wall of the gun holder groove, correspondingly arranged with the force-applying blocks. A pressure spring connects the fixing blocks and the force-applying blocks. Under the tension of the pressure spring, the cartridge pressure ring presses against the rear end wall of the cartridge to fix the cartridge.

[0008] By adopting the above technical solution, the pressure ring of the glue tube is always pulled towards the front end of the glue gun under the tension of the pressure spring. A pair of pressure springs can ensure that the pressure ring of the glue tube is subjected to stable force. Before the glue tube is put into the gun holder slot, the pressure ring of the glue tube is moved towards the rear end of the glue gun to make room in the gun holder slot. After the glue tube is put into the gun holder slot, the pressure ring of the glue tube is released. Under the tension of a pair of pressure springs, the pressure ring of the glue tube presses against the rear end wall of the glue tube, which can fix the glue tube. This avoids the glue tube losing its fixation and displacement and shaking in the gun holder slot when the center push rod and push rod disc retract each time, thus ensuring that the glue gun can be used stably.

[0009] Optionally, the inner wall of the gun holder slot is provided with a pressure ring receiving groove, the rubber tube pressure ring is disposed in the pressure ring receiving groove and can move in the pressure ring receiving groove, the inner ring of the rubber tube pressure ring extends out of the pressure ring receiving groove and presses against the rear end wall of the rubber tube, and the inner ring of the rubber tube pressure ring is flush with the inner wall of the rubber tube.

[0010] By adopting the above technical solution, the pressure ring receiving groove is provided for the rubber tube pressure ring to be received, so that the inner ring of the rubber tube pressure ring can be kept flush with the inner wall of the rubber tube. While ensuring that the rubber tube pressure ring can stably press against the rubber tube, it will not hinder the central push rod and push rod disc from entering and exiting the rubber tube.

[0011] Optionally, the pressure ring receiving groove and the pair of sliding holes both extend to the rear cover of the gun holder slot, and a relief groove is formed on the rear cover of the gun holder slot for receiving the rubber tube pressure ring and the pair of force blocks.

[0012] By adopting the above technical solution, the relief groove accommodates the rubber tube pressure ring and a pair of force blocks. When the length of the rubber tube is exactly matched with the length of the gun holder slot, that is, when the rubber tube is just placed in the gun holder slot, there is no need for the rubber tube pressure ring to fix the rubber tube. The gun holder slot itself can fix the rubber tube. In order to prevent the rubber tube pressure ring from hindering the installation of the rubber tube, the rubber tube pressure ring and a pair of force blocks can be moved into the relief groove so that the rubber tube can be completely placed into the gun holder slot.

[0013] Optionally, a pawl-like block is provided on one of the force-applying blocks on the outer wall of the gun base slot. The pawl-like block is rotatably connected to the outer wall of the gun base slot. A torsion spring is installed on the rotation shaft between the pawl-like block and the outer wall of the gun base slot. One end of the torsion spring is fixed to the outer wall of the gun base slot, and the other end is fixed to the pawl-like block. When the force-applying block is retracted into the relief groove, the pawl-like block is pressed against the force-applying block under the torsion of the torsion spring to fix the force-applying block.

[0014] By adopting the above technical solution, after the rubber tube pressing ring and a pair of force-applying blocks are moved into the relief groove, the ratchet-like block is pressed against the force-applying block under the torsion of the torsion spring, thus fixing the force-applying block and subsequently fixing the rubber tube pressing ring. This structure is suitable for situations where the length of the rubber tube is exactly matched with the length of the gun holder slot, and there is no need for the rubber tube pressing ring to fix the rubber tube. On the other hand, it is suitable for fixing the rubber tube pressing ring first when the rubber tube is placed into the gun holder slot to prevent the rubber tube pressing ring from hindering the installation of the rubber tube in the gun holder slot.

[0015] Optionally, the rubber tube pressing ring is provided with an opening structure, and the opening structure on the rubber tube pressing ring is adapted to the opening structure of the gun seat groove.

[0016] By adopting the above technical solution, an opening structure is also provided on the rubber tube pressure ring to adapt to the opening structure of the gun holder slot, so as not to hinder the installation of the rubber tube in the gun holder slot.

[0017] Optionally, one of the force-applying blocks has a deceleration block extending from one end of the gun holder slot. The deceleration block extends toward one side of the sliding hole. Multiple sponge blocks are provided on the outer wall of the gun holder slot. The multiple sponge blocks are located on one side of the sliding hole and are spaced apart along the direction of the sliding hole. When the pressure spring pulls the force-applying block to move, it drives the deceleration block to move synchronously. The sponge blocks and the deceleration blocks are set in contact.

[0018] By adopting the above technical solution, a deceleration block and a sponge blocking block are set up. When the deceleration block hits the sponge blocking block, the sponge blocking block deforms and obstructs the deceleration block, which has the effect of slowing down the force application block and the rubber tube pressure ring. This avoids the pressure spring pulling the rubber tube pressure ring, causing the rubber tube pressure ring to hit the rear end wall of the rubber tube violently, which would damage the rubber tube and the glue gun.

[0019] Optionally, the sponge block has a circular structure, the center of the sponge block is rotatably connected to the outer wall of the gun base slot, and the deceleration block is in contact with the outer ring of the sponge block.

[0020] By adopting the above technical solution, the sponge block can rotate on the outer wall of the gun holder slot. While ensuring that it can obstruct the deceleration block and reduce the moving speed of the rubber tube pressure ring, it will not completely jam the movement of the deceleration block, ensuring that the rubber tube pressure ring can move smoothly.

[0021] Optionally, a spring protective cover is provided at each of the pair of compression springs. One side of the spring protective cover is fixed to the outer wall of the gun base slot, and the other side is spaced apart from the outer wall of the gun base slot. The spring protective cover covers the outside of the fixing block, the force-applying block and the compression spring.

[0022] By adopting the above technical solution, the spring protection cover can protect the compression spring from damage caused by external objects or human error during use.

[0023] Optionally, a mounting plate is connected to one side of the outer wall of the spring protective cover and the gun base slot, and a mounting screw is provided between the mounting plate and the outer wall of the gun base slot.

[0024] By adopting the above technical solution, the spring protective cover can be disassembled relative to the outer wall of the gun base slot, which facilitates the installation of the pressure spring between the fixing block and the force-applying block.

[0025] In summary, this application includes the following beneficial technical effects:

[0026] 1. Before inserting the glue cartridge into the gun holder slot, move the glue cartridge pressure ring towards the rear end of the glue gun to make room in the gun holder slot. After the glue cartridge is inserted into the gun holder slot, release the glue cartridge pressure ring. Under the tension of a pair of pressure springs, the glue cartridge pressure ring presses against the rear end wall of the glue cartridge, thus fixing the glue cartridge in place. This prevents the glue cartridge from losing its fixation and shifting or shaking in the gun holder slot each time the center push rod and push rod disc retract, ensuring that the glue gun can be used stably.

[0027] 2. The relief groove accommodates the rubber tube pressure ring and a pair of force blocks. When the length of the rubber tube is exactly matched with the length of the gun holder slot, that is, when the rubber tube is just placed in the gun holder slot, there is no need for the rubber tube pressure ring to fix the rubber tube. The gun holder slot itself can fix the rubber tube. In order to prevent the rubber tube pressure ring from hindering the installation of the rubber tube, the rubber tube pressure ring and a pair of force blocks can be moved into the relief groove so that the rubber tube can be completely placed into the gun holder slot.

[0028] 3. When the deceleration block hits the sponge block, the sponge block deforms and obstructs the deceleration block, thus slowing down the force application block and the pressure ring of the glue tube. This prevents the pressure spring from pulling the pressure ring of the glue tube, causing the pressure ring to violently impact the rear wall of the glue tube and damage the glue tube and the glue gun. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a caulking gun before the glue cartridge is installed in the prior art.

[0030] Figure 2 This is a schematic diagram of a caulking gun after the glue cartridge has been installed in the prior art.

[0031] Figure 3 This is a schematic diagram of the glue gun after the glue cartridge is installed in an embodiment of this application.

[0032] Figure 4 This is a schematic diagram of the glue gun before the glue cartridge is installed in an embodiment of this application.

[0033] Figure 5 yes Figure 4 Enlarged view of section A.

[0034] Figure 6 yes Figure 4 Enlarged view of section B.

[0035] Reference numerals: 1. Glue cartridge; 2. Glue nozzle; 3. Glue gun body; 31. Gun holder slot; 311. Sliding hole; 312. Pressure ring receiving groove; 313. Relief groove; 32. Push rod pressure plate; 33. Center push rod; 34. Push rod disc; 35. Handle; 36. Glue pushing trigger; 4. Glue cartridge pressure ring; 5. Force block; 6. Fixing block; 7. Pressure spring; 8. Racket-like block; 9. Torsion spring; 10. Deceleration block; 11. Sponge blocking block; 12. Spring protective cover. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 3-6 This application will be described in further detail.

[0037] This application discloses a caulking gun for building construction, referring to... Figure 3 and Figure 4In use, first cut the glue head at the front end of the glue cartridge 1, then install the glue nozzle 2 on the glue head. Cut the glue nozzle 2 at a 45° angle with a knife. Press the push rod pressure plate 32 at the rear end of the glue gun body 3, and pull the central push rod 33 in the glue gun body 3 backward. Then install the glue cartridge 1 into the gun holder slot 31 of the glue gun body 3. Then push the central push rod 33 forward so that the push rod disc 34 at the front end of the central push rod 33 enters the glue cartridge 1 and presses the glass glue. This process also fixes the glue cartridge 1 in the gun holder slot 31. The operator's hand Holding handle 35, repeatedly pressing the adhesive push trigger 36 squeezes the silicone sealant in the glue cartridge 1, causing it to be extruded from the nozzle 2, thus performing the caulking and sealant application operation in construction. It should be noted that each press of the adhesive push trigger 36 constitutes one stroke of silicone sealant compression. After each release of the trigger 36, the central push rod 33 and push rod disc 34 automatically retract by approximately 2mm to automatically cut off the sealant flow after each stroke, preventing continuous pressure and leakage from the nozzle 2, which would lead to sealant waste and difficulty in cleaning. However, after each stroke of silicone sealant compression, the automatic retraction of the central push rod 33 and push rod disc 34 causes the glue cartridge 1 to lose its fixation, making it prone to displacement and shaking within the gun holder slot 31. This instability affects the use of the caulking gun. The aforementioned defect only applies when the length of the glue cartridge 1 is shorter than the length of the gun holder slot 31. If the length of the glue cartridge 1 is exactly equal to the length of the gun holder slot 31, the aforementioned defect does not exist.

[0038] Reference Figure 3 and Figure 4 However, in most cases, the specifications of the rubber tube 1 and the size of the gun holder groove 31 are not well matched, that is, the length of the rubber tube 1 is shorter than the length of the gun holder groove 31. Therefore, the above-mentioned defects need to be solved. So a rubber tube pressing ring 4 is set in the gun holder groove 31. The rubber tube pressing ring 4 is a ring structure that matches the internal circular space of the gun holder groove 31. The top of the rubber tube pressing ring 4 has the same opening structure as the gun holder groove 31. The rubber tube pressing ring 4 moves in the gun holder groove 31 along the length direction of the gun holder groove 31. A pressure ring receiving groove 312 is provided on the inner wall of the gun holder slot 31. The pressure ring receiving groove 312 is opened along the length direction of the gun holder slot 31 and is located at the rear end of the gun holder slot 31. The rubber tube pressure ring 4 is adapted to be installed in the pressure ring receiving groove 312 and can move in the pressure ring receiving groove 312. On the one hand, it can improve the stability of the movement of the rubber tube pressure ring 4, and on the other hand, it controls the movement range of the rubber tube pressure ring 4 to be limited to the rear end of the gun holder slot 31. The inner ring of the rubber tube pressure ring 4 extends out of the pressure ring receiving groove 312. When the rubber tube 1 is placed into the gun holder slot 31, the rubber tube pressure ring 4 is moved so that the rubber tube pressure ring 4 presses against the rear end wall of the rubber tube 1. Here, it is necessary to design that the inner ring of the rubber tube pressure ring 4 is flush with the inner wall of the rubber tube 1 to prevent affecting the normal entry and exit of the central push rod 33 and the push rod disc 34 into the rubber tube 1.

[0039] Reference Figure 4 and Figure 5 A pair of force-applying blocks 5 are integrally formed on the outer ring of the rubber tube pressing ring 4. The pair of force-applying blocks 5 are symmetrically distributed on both sides with the center of the rubber tube pressing ring 4. A sliding hole 311 is provided on the side wall of the gun seat groove 31 corresponding to the pair of force-applying blocks 5. The sliding hole 311 is set along the length direction of the gun seat groove 31. The force-applying blocks 5 are adapted to be set in the sliding hole 311. During the movement of the rubber tube pressing ring 4, the force-applying blocks 5 can be driven to move in the sliding hole 311. The force-applying block 5 extends out of the sliding hole 311 (i.e., extends out of the outer wall of the gun holder groove 31). On the outer wall of the gun holder groove 31, a fixing block 6 is provided at the front end of each pair of sliding holes 311. A pressure spring 7 is connected between the fixing block 6 and the corresponding force-applying block 5. Therefore, under the pulling force of the pressure spring 7, the glue tube pressure ring 4 presses against the rear end wall of the glue tube 1 to fix the glue tube 1. This avoids the glue tube 1 from losing its fixation and displacing and shaking in the gun holder groove 31 when the central push rod 33 and push rod disc 34 retract each time, thus ensuring that the glue gun can be used stably.

[0040] Reference Figure 4 and Figure 6 Considering the compatibility between the specifications of the rubber tube 1 and the size of the gun holder slot 31, i.e., the length of the rubber tube 1 is exactly equal to the length of the gun holder slot 31, in this case, there is no need for the rubber tube pressure ring 4 to fix the rubber tube 1. The rubber tube 1 can be fixed by the gun holder slot 31 itself. In this case, the rubber tube pressure ring 4 occupies the space of the gun holder slot 31, which will hinder the installation of the rubber tube 1 in the gun holder slot 31. Therefore, the pressure ring receiving groove 312 and the pair of sliding holes 311 are extended to the rear cover of the gun holder slot 31. A relief groove 313 is formed on the rear cover of the gun holder slot 31 to accommodate the rubber tube pressure ring 4 and the pair of force blocks 5. Therefore, the rubber tube pressure ring 4 and the pair of force blocks 5 are moved into the relief groove 313 (this process needs to overcome the tension of the pressure spring 7), which can completely free up the space of the gun holder slot 31 so that the rubber tube 1 can be completely put into the gun holder slot 31.

[0041] Another type of ratchet block 8 is provided at one of the force-applying blocks 5, near the relief groove 313. The ratchet block 8 is rotatably connected to the outer wall of the gun base slot 31. A torsion spring 9 is sleeved on the rotating shaft between the ratchet block 8 and the outer wall of the gun base slot 31. One end of the torsion spring 9 is fixed to the outer wall of the gun base slot 31, and the other end is fixed to the ratchet block 8. When the rubber tube pressing ring 4 and a pair of force-applying blocks 5 are moved into the relief groove 313, the ratchet block 8 is pressed against the force-applying block 5 under the torsion of the torsion spring 9 to fix the force-applying block 5, thereby fixing the rubber tube pressing ring 4, so that the rubber tube pressing ring 4 is stably located in the relief groove 313. The structure of the aforementioned ratchet block 8 is suitable for situations where the length of the rubber tube 1 is exactly matched with the length of the gun holder slot 31, and there is no need for the rubber tube pressing ring 4 to fix the rubber tube 1. On the other hand, it is suitable for fixing the rubber tube pressing ring 4 first when the rubber tube 1 is placed into the gun holder slot 31, so as to prevent the rubber tube pressing ring 4 from hindering the installation of the rubber tube 1 in the gun holder slot 31.

[0042] Reference Figure 4 and Figure 5 Multiple sponge blocks 11 are provided on one side of one of the sliding holes 311 on the outer wall of the gun holder slot 31. The multiple sponge blocks 11 are equidistantly distributed along the length of the sliding hole 311. The sponge blocks 11 are circular and rotatably connected to the outer wall of the gun holder slot 31. A deceleration block 10 is provided on the force block 5 on the side corresponding to the sponge blocks 11. The deceleration block 10 is perpendicular to the force block 5, so that the deceleration block 10 extends towards one side of the sliding hole 311 (i.e., towards the multiple sponge blocks 11). When the pressure spring 7 pulls the force block 5 to move, the deceleration block 10 moves synchronously. The deceleration block 10 will hit each sponge block 11 in turn. The sponge blocks 11 deform and form an obstacle to the deceleration block 10, which has the effect of slowing down the force block 5 and the glue tube pressure ring 4, so as to avoid the pressure spring 7 pulling the glue tube pressure ring 4 and causing the glue tube 1 pressure ring to hit the rear end wall of the glue tube 1 violently, which would damage the glue tube 1 and the glue gun. It should be noted that while the sponge block 11 can impede the deceleration block 10 and reduce the moving speed of the rubber tube pressure ring 4, it will not completely block the movement of the deceleration block 10, ensuring that the rubber tube pressure ring 4 can move smoothly.

[0043] Reference Figure 3 A spring protective cover 12 is provided on one side of each pair of sliding holes 311. An integrally formed mounting piece is formed on one side of the spring protective cover 12. The mounting piece is fixed to the outer wall of the gun base slot 31 by mounting screws, thereby fixing the spring protective cover 12. There is a gap between the other side of the spring protective cover 12 and the outer wall of the gun base slot 31. The spring protective cover 12 can cover the fixing block 6, the force application block 5 and the pressure spring 7, mainly to protect the pressure spring 7 from damage by external objects or human error during use.

[0044] The implementation principle of a caulking gun for construction in this application embodiment is as follows: Under the tension of the pressure spring 7, the pressure ring 4 of the glue tube is always pulled towards the front end of the caulking gun. A pair of pressure springs 7 can ensure that the pressure ring 4 of the glue tube is subjected to stable force. Before the glue tube 1 is put into the gun holder slot 31, the pressure ring 4 of the glue tube is moved towards the rear end of the caulking gun to make room in the gun holder slot 31. After the glue tube 1 is put into the gun holder slot 31, the pressure ring 4 of the glue tube is released. Under the tension of the pair of pressure springs 7, the pressure ring 4 of the glue tube presses against the rear end wall of the glue tube 1, which can fix the glue tube 1. This avoids the glue tube 1 losing its fixation and displacing and shaking in the gun holder slot 31 when the central push rod 33 and push rod disc 34 retract each time, thus ensuring that the caulking gun can be used stably.

[0045] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A caulking gun for building construction, comprising a caulking gun body (3), characterized in that, The glue gun body (3) has a glue cartridge pressing ring (4) in the gun holder groove (31). The glue cartridge pressing ring (4) can move along the length of the gun holder groove (31). The outer ring of the glue cartridge pressing ring (4) is provided with a pair of force-applying blocks (5). The pair of force-applying blocks (5) are symmetrically distributed around the center of the glue cartridge pressing ring (4). The side wall of the gun holder groove (31) is provided with a pair of sliding holes (311). The sliding holes (311) are arranged along the length of the gun holder groove (31). The force block (5) and the sliding hole (311) are respectively arranged. The force block (5) passes through the corresponding sliding hole (311) and extends out of the gun seat groove (31). A pair of fixing blocks (6) are provided on the outer wall of the gun seat groove (31). The fixing block (6) and the force block (5) are respectively arranged. A pressure spring (7) is connected between the fixing block (6) and the force block (5). Under the tension of the pressure spring (7), the rubber tube pressure ring (4) presses against the rear end wall of the rubber tube (1) to fix the rubber tube (1). The inner wall of the gun holder slot (31) is provided with a pressure ring receiving groove (312). The rubber tube pressure ring (4) is located in the pressure ring receiving groove (312) and can move in the pressure ring receiving groove (312). The inner ring of the rubber tube pressure ring (4) extends out of the pressure ring receiving groove (312) and presses against the rear end wall of the rubber tube (1). The inner ring of the rubber tube pressure ring (4) is flush with the inner wall of the rubber tube (1). The pressure ring receiving groove (312) and the pair of sliding holes (311) both extend to the rear cover of the gun holder slot (31), and a relief groove (313) for receiving the rubber tube pressure ring (4) and the pair of force blocks (5) is formed on the rear cover of the gun holder slot (31). A pawl-like block (8) is provided on one of the force-applying blocks (5) on the outer wall of the gun mount slot (31). The pawl-like block (8) is rotatably connected to the outer wall of the gun mount slot (31). A torsion spring (9) is installed on the rotation shaft between the pawl-like block (8) and the outer wall of the gun mount slot (31). One end of the torsion spring (9) is fixed to the outer wall of the gun mount slot (31), and the other end is fixed to the pawl-like block (8). When the force-applying block (5) is retracted into the relief groove (313), the pawl-like block (8) presses against the force-applying block (5) under the torsion of the torsion spring (9) to fix the force-applying block (5).

2. The caulking gun for building construction according to claim 1, characterized in that, The rubber tube pressing ring (4) is provided with an opening structure, and the opening structure on the rubber tube pressing ring (4) is adapted to the opening structure of the gun seat groove (31).

3. The caulking gun for building construction according to claim 1, characterized in that, One of the force-applying blocks (5) extends out of the gun holder slot (31) and is provided with a deceleration block (10). The deceleration block (10) extends toward one side of the sliding hole (311). Multiple sponge blocks (11) are provided on the outer wall of the gun holder slot (31). The multiple sponge blocks (11) are located on one side of the sliding hole (311) and are distributed at intervals along the direction of the sliding hole (311). When the pressure spring (7) pulls the force-applying block (5) to move, it drives the deceleration block (10) to move synchronously. The sponge blocks (11) and the deceleration blocks (10) are set in contact.

4. The caulking gun for building construction according to claim 3, characterized in that, The sponge block (11) has a circular structure. The center of the sponge block (11) is rotatably connected to the outer wall of the gun seat slot (31). The deceleration block (10) and the outer ring of the sponge block (11) are in contact.

5. The caulking gun for building construction according to claim 1, characterized in that, A spring protective cover (12) is provided at each of the pair of compression springs (7). One side of the spring protective cover (12) is fixed to the outer wall of the gun seat slot (31), and the other side has a gap between it and the outer wall of the gun seat slot (31). The spring protective cover (12) covers the outside of the fixing block (6), the force application block (5) and the compression spring (7).

6. The caulking gun for building construction according to claim 5, characterized in that, A mounting plate is connected to one side of the outer wall of the spring protective cover (12) and the gun base slot (31), and a mounting screw is provided between the mounting plate and the outer wall of the gun base slot (31).

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