A glue gun with convenient adjustment of glue output and pushing force

Abstract

The utility model provides a kind of glue gun of facilitating adjustment glue output and thrust, including gun body, glue cylinder, front spring, push plate, thrust assembly, trigger, jackscrew and push rod;Glue cylinder is installed at the front end of gun body;Push rod is movably arranged on gun body and extends into glue cylinder;Gun body has a lumen that is passed through by push rod;Front spring and push plate are sequentially arranged in lumen and are sleeved on push rod;The front end of front spring is in abutment with gun body, and rear end is in abutment with push plate;Abutment portion is provided in lumen, and the upper end of push plate is in abutment with abutment portion;Trigger is hinged on gun body by hinged shaft, first jackscrew is installed on the upper end of trigger, and trigger is swung by first jackscrew when rotating, to be able to drive push rod to move forward.The utility model is provided with adjusting structure on jackscrew structure or hinged shaft, to realize the adjustment of glue output and thrust.

Description

Technical Field

[0001] This utility model relates to glue guns, and more particularly, to a glue gun with convenient adjustment of glue dispensing volume and thrust. Background Technology

[0002] A caulking gun is a tool for dispensing adhesive, commonly used for silicone sealant, grout sealant, etc. Currently available caulking guns have a fixed advance distance of the lever each time the trigger is pulled, and the thrust is not adjustable, resulting in an unadjustable adhesive dispensing volume. This is inconvenient for users, as in some situations it is necessary to appropriately reduce or increase the adhesive dispensing volume. Therefore, there is an urgent need to design a caulking gun with adjustable adhesive dispensing volume. Utility Model Content

[0003] In view of this, the first objective of this utility model is to provide a glue gun that allows for convenient adjustment of glue dispensing volume and thrust, which achieves adjustment of glue dispensing volume and thrust by adjusting the position of the push rod on the trigger.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A glue gun with adjustable glue dispensing volume and thrust includes a gun body, a glue cartridge, a front spring, a push plate, a thrust stop assembly, a trigger, a first push rod, and a push rod. The glue cartridge is installed at the front end of the gun body. The push rod is movably inserted through the gun body and extends into the glue cartridge. The gun body has an inner cavity through which the push rod passes. The front spring and the push plate are sequentially arranged in the inner cavity and sleeved on the push rod. The front end of the front spring abuts against the gun body, and the rear end abuts against the push plate. An abutting part is provided in the inner cavity, and the upper end of the push plate abuts against the abutting part. The trigger is hinged to the gun body, and the first push rod is installed on the upper end of the trigger. When the trigger rotates, it pushes the push plate to swing through the first push rod, thereby driving the push rod forward. A first strip-shaped hole is provided through the trigger, and a first rack portion and a second rack portion are respectively provided on a pair of inner walls of the first strip-shaped hole. The first push rod passes through the first strip hole and can slide axially. The first push rod is also provided with a first gear part that meshes with the first rack part and the second rack part. Specifically, when the first push rod slides axially to the first interval position, the first gear part meshes with both the first rack part and the second rack part; when the first push rod slides axially to the second interval position, the first gear part meshes only with the first rack part.

[0005] Preferably, the width of the first rack portion is greater than that of the second rack portion.

[0006] Preferably, the first push rod is provided with a first reset component for resetting the first push rod after it has disengaged from the first interval position and for maintaining it in the first interval position.

[0007] Preferably, the first reset assembly includes a first reset spring, a first limiting member, and a first knob; the first limiting member and the first knob are respectively installed at both ends of the first push rod; the first reset spring is disposed on the first push rod and located between the first knob and the trigger.

[0008] Preferably, a sleeve is fitted onto the first gear portion.

[0009] Preferably, the trigger is provided with a guide bar.

[0010] The second objective of this invention is to provide a glue gun that allows for easy adjustment of glue dispensing volume and thrust, which achieves glue dispensing volume adjustment by adjusting the rotation angle of the trigger.

[0011] To achieve the above objectives, the technical solution of this utility model is as follows: A glue gun with easily adjustable glue dispensing volume and thrust, characterized by comprising a gun body, a glue cartridge, a front spring, a push plate, a thrust stop assembly, a trigger, a second push rod, and a push rod; the glue cartridge is installed at the front end of the gun body; the push rod is movably inserted through the gun body and extends into the glue cartridge; the gun body has an inner cavity through which the push rod passes; the front spring and the push plate are sequentially arranged in the inner cavity and sleeved on the push rod; the front end of the front spring abuts against the gun body, and the rear end abuts against the push plate; an abutting part is provided in the inner cavity, and the upper end of the push plate abuts against the abutting part; the trigger is hinged to the gun body via a second hinge shaft, and the second push rod is installed at the upper end of the trigger; when the trigger rotates, it pushes the push plate to swing through the second push rod, thereby driving the push rod forward; the trigger is provided with a through hole for the second hinge shaft to pass through; the gun body is provided with a second strip-shaped hole, and a third rack portion and a fourth rack portion are respectively provided on a pair of inner walls of the second strip-shaped hole; The second hinge shaft passes through the second strip hole and can slide axially. The second hinge shaft is also provided with a second gear part that meshes with the third rack part and the fourth rack part. Specifically, when the second hinge shaft slides axially to the first interval position, the second gear part simultaneously meshes with the third rack part and the fourth rack part; when the second hinge shaft slides axially to the second interval position, the second gear part only meshes with the fourth rack part.

[0012] Preferably, the width of the third rack portion is greater than that of the fourth rack portion.

[0013] Preferably, the second gear portion includes a first tooth segment and a second tooth segment, the first tooth segment and the second tooth segment being spaced apart; when the second hinge shaft is in the first interval position, the first tooth segment simultaneously meshes with the third rack portion and the fourth rack portion; when the second hinge shaft slides axially to the second interval position, the second tooth segment meshes with the fourth rack portion.

[0014] Preferably, the second hinge shaft is provided with a reset component for resetting the second hinge shaft after it has disengaged from the first interval position and for maintaining it in the first interval position.

[0015] Preferably, the reset assembly includes a second reset spring, a second limiting member, and a second knob; the second limiting member and the second knob are respectively installed at both ends of the second hinge shaft; the second reset spring is disposed on the second hinge shaft and located between the second knob and the trigger.

[0016] Preferably, a bushing adapted to the second gear portion is nested inside the through hole.

[0017] The main technical effects of this utility model are reflected in the following aspects: The position of the push rod on the trigger can be adjusted by simply rotating the push rod, or the rotation angle of the trigger can be adjusted by rotating the hinge shaft; both methods can adjust the amount of glue dispensed and the pushing force of the push plate. The top rod or hinge shaft is easy to rotate, and a flexible retaining structure is designed to prevent the top rod or hinge shaft from rotating on its own. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the glue gun in Example 1; Figure 2 This is a partial exploded view of the glue gun in Example 1; Figure 3 This is a sectional view of the mounting structure of the top rod in Embodiment 1; Figure 4 This is a schematic diagram of the first rack section and the second rack section in Embodiment 1; Figure 5 This is a schematic diagram of the glue gun in Example 2; Figure 6 This is a partial exploded view of the glue gun in Example 2; Figure 7 This is a sectional view of the mounting structure of the hinge shaft in Embodiment 2; Figure 8 This is a schematic diagram of the first and fourth rack sections in Embodiment 2.

[0019] Reference numerals: 1. Gun body; 11. Inner cavity; 12. Second strip hole; 121. Third rack section; 122. Fourth rack section; 13. Abutment part; 2. Trigger; 21. Support arm; 211. First strip hole; 212. First rack section; 213. Second rack section; 22. Second through hole; 3. Rubber sleeve; 4. Thrust assembly; 5. Front spring; 6. Push rod; 7. Push plate; 81. First push rod; 811. First gear section; 82. First knob; 83. First washer; 84. First return spring; 85. First limiting member; 86. First hinge shaft; 87. Sleeve; 91. Second hinge shaft; 911. First tooth segment; 912. Second tooth segment; 92. Second washer; 93. Second return spring; 94. Second knob; 95. Bushing; 96. Second limiting member; 97. Second push rod. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0021] Example 1

[0022] like Figure 1 As shown, this embodiment aims to provide a glue gun that facilitates adjustment of glue dispensing volume and thrust, which includes a gun body 1, glue cylinder 3, front spring 5, push plate 7, thrust stop assembly 4, trigger 2, first push rod 81, and push rod 6.

[0023] The rubber sleeve 3 is installed at the front end of the gun body 1, and the thrust assembly 4 is installed at the rear end of the gun body 1 and connected to the push rod 6.

[0024] The push rod 6 is movably mounted on the gun body 1 and extends into the rubber sleeve 3; the gun body 1 has an inner cavity 11 through which the push rod 6 passes; the front spring 5 and the push plate 7 are sequentially arranged in the inner cavity 11 and sleeved on the push rod 6.

[0025] The front end of the front spring 5 abuts against the gun body 1, and the rear end abuts against the push plate 7; an abutment part 13 is provided in the inner cavity 11, and the upper end of the push plate 7 abuts against the abutment part 13; under the push of the front spring 5, the push plate 7 can be reset and always abut against the abutment part 13.

[0026] The trigger 2 is hinged to the gun body 1 via a first hinge shaft 86. Both the gun body 1 and the trigger 2 have a first through hole through which the first hinge shaft 86 passes. A first push rod 81 is mounted on the upper end of the trigger 2. When the trigger 2 rotates, it pushes the push plate 7 to swing via the first push rod 81, thereby driving the push rod 6 forward.

[0027] The structure described above is basically the same as that of glue guns sold on the market, and the specific principle will not be described in this embodiment.

[0028] Reference Figure 2-4The upper part of the trigger 2 is forked and consists of two spaced-apart support arms 21. Each of the two support arms 21 has a first strip hole 211 through it. The inner walls of the first strip hole 211 are respectively provided with a first rack portion 212 and a second rack portion 213, wherein the width of the first rack portion 212 is greater than that of the second rack portion 213.

[0029] The first push rod 81 passes through the first strip hole 211 and can slide axially. The first push rod 81 is also provided with a first gear part 811 that meshes with the first rack part 212 and the second rack part 213. It is worth noting that the second rack part 213 is divided into two sections, each corresponding to one of the first rack parts 212 and the second rack part 213 in the first strip hole 211, respectively.

[0030] When the first push rod 81 slides axially to the first interval position, the first gear part 811 simultaneously meshes with the first rack part 212 and the second rack part 213. At this time, the first gear part 811 cannot rotate, that is, the first push rod 81 is locked and cannot rotate. When the first push rod 81 slides axially to the second interval position, the first gear part 811 only meshes with the first rack part 212. At this time, the first gear part 811 can rotate, that is, the first push rod 81 is unlocked and can rotate freely.

[0031] Additionally, a first reset assembly is provided on the first push rod 81 to reset it after it has disengaged from the first interval position and to maintain it in the first interval position. Specifically, the first reset assembly includes a first reset spring 84, a first limiting member 85, and a first knob 82. The first limiting member 85 and the first knob 82 are respectively installed at both ends of the first push rod 81, specifically connected by bolts. Furthermore, the first reset spring 84 is disposed on the first push rod 81 and located between the first knob 82 and the trigger 2. Thus, in its natural state, the first reset spring 84 pushes the first knob 82 away from the trigger 2, thereby causing the first push rod 81 to move until the first limiting member 85 is in close contact with the trigger 2. A first washer 83 is also fitted on the first push rod 81 to prevent the first reset spring 84 from directly contacting the surface of the trigger 2, thereby preventing the end of the first reset spring 84 from scratching the trigger 2.

[0032] With the above technical solution, when it is necessary to rotate the first push rod 81, press the knob to disengage the first gear part 811 from the first interval position, then rotate the knob to drive the first push rod 81 to rotate until the first push rod 81 rotates to the appropriate position. Release the knob, and under the push of the first return spring 84, the second gear part returns to the first interval position. In this way, by adjusting the position of the first push rod 81, when the trigger 2 rotates at the same angle, the first push rod 81 can contact the push plate 7 earlier or later.

[0033] A sleeve 87 is fitted onto the first gear section 811. The sleeve 87 can be made of a wear-resistant material. By contacting the push plate 7 with the sleeve 87, wear on the first gear section 811 is prevented. Furthermore, preferably, a guide bar is provided on the trigger 2, and the sleeve 87 is in close contact with the guide bar. By providing the guide bar, the first push rod 81 can be more stable and less prone to wobbling during rotation.

[0034] Example 2

[0035] The basic structure of the glue gun in this embodiment is basically the same as that in Embodiment 1, such as... Figure 5 As shown. It includes the gun body 1, rubber sleeve 3, front spring 5, push plate 7, thrust assembly 4, trigger 2, second push rod 97, and push rod 6. The specific connection structure will not be described in detail.

[0036] The upper part of the trigger 2 is also bifurcated, consisting of two support arms 21. Each support arm 21 has a second through hole 22 through which the second hinge shaft 91 passes. Simultaneously, a second strip-shaped hole 12 is provided on the gun body 1, through which the second hinge shaft 91 passes and can slide axially. A third rack portion 121 and a fourth rack portion 122 are respectively provided on the inner walls of the second strip-shaped hole 12, wherein the width of the third rack portion 121 is greater than that of the fourth rack portion 122. The second hinge shaft 91 also has a second gear portion that interacts with the third rack portion 121 and the fourth rack portion 122. Specifically, the second gear section includes a first tooth segment 911 and a second tooth segment 912, which are spaced apart. When the second hinge shaft 91 is in the first interval position, the first tooth segment 911 meshes with both the third rack section 121 and the fourth rack section 122. At this time, the second gear section cannot rotate, that is, the second hinge shaft 91 is locked and cannot rotate. When the second hinge shaft 91 slides axially to the second interval position, the second tooth segment 912 meshes with the fourth rack section 122. At this time, the second gear section can rotate, that is, the second hinge shaft 91 is unlocked and can rotate.

[0037] A second reset assembly is provided on the second hinge shaft 91 for resetting it after it has disengaged from the first interval position and maintaining it in the first interval position. Specifically, the second reset assembly includes a second reset spring 93, a second knob 94, and a second limiting member 96. The second knob 94 and the second limiting member 96 are detachably mounted at both ends of the second hinge shaft 91. The second reset spring 93 is disposed on the second hinge shaft 91 and located between the second knob 94 and the trigger 2. The second reset spring 93 is used to push the second hinge shaft 91 to move axially until the second limiting member 96 is in close contact with the trigger 2.

[0038] A second washer 92 is fitted on the second hinge shaft 91. One end of the second return spring 93 abuts against the second hinge shaft 91, and the other end abuts against the second knob 94. By setting the washer, the second return spring 93 can be prevented from causing wear on the surface of the trigger 2.

[0039] In addition, a bushing 95 adapted to the second gear is nested inside the second through hole 22, which can prevent the second gear from being worn by the frequent rotation of the trigger 2.

[0040] With the above technical solution, when it is necessary to rotate the second hinge shaft 91, press the second knob 94 to disengage the first gear part 811 from the first interval position, then rotate the second knob 94 to drive the second push rod 97 to rotate until the second hinge shaft 91 rotates to the appropriate position. Release the second knob 94, and under the push of the second return spring 93, the second gear part returns to the first interval position. In this way, by adjusting the position of the second hinge shaft 91, the angle at which the trigger 2 can rotate can be adjusted.

[0041] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A glue gun with adjustable glue dispensing volume and thrust, comprising a gun body (1), a glue cartridge (3), a front spring (5), a push plate (7), a thrust stop assembly (4), a trigger (2), a first push rod (81), and a push rod (6); the glue cartridge (3) is installed at the front end of the gun body (1); the push rod (6) is movably inserted through the gun body (1) and extends into the glue cartridge (3); the gun body (1) has an inner cavity (11) through which the push rod (6) passes; the front spring (5) and the push plate (7) are sequentially arranged in the inner cavity (11) and sleeved. It is mounted on the push rod (6); the front end of the front spring (5) abuts against the gun body (1), and the rear end abuts against the push plate (7); an abutment part (13) is provided in the inner cavity (11), and the upper end of the push plate (7) abuts against the abutment part (13); the trigger (2) is hinged to the gun body (1), and the first push rod (81) is installed on the upper end of the trigger (2). When the trigger (2) rotates, it pushes the push plate (7) to swing through the first push rod (81), so as to drive the push rod (6) to move forward; its characteristic is that, The trigger (2) has a first strip hole (211) through it, and a first rack portion (212) and a second rack portion (213) are respectively provided on a pair of inner walls of the first strip hole (211); The first push rod (81) passes through the first strip hole (211) and can slide along the axial direction. The first push rod (81) is also provided with a first gear part (811) that meshes with the first rack part (212) and the second rack part (213). When the first push rod (81) slides axially to the first interval position, the first gear part (811) meshes with the first rack part (212) and the second rack part (213) at the same time; when the first push rod (81) slides axially to the second interval position, the first gear part (811) meshes with the first rack part (212) only.

2. The glue gun with easily adjustable glue dispensing volume and thrust according to claim 1, characterized in that, The width of the first rack portion (212) is greater than that of the second rack portion (213).

3. A glue gun with easily adjustable glue dispensing volume and thrust according to claim 1, characterized in that, The first push rod (81) is provided with a first reset component for resetting the first push rod (81) after it is disengaged from the first interval position and maintaining it in the first interval position; the first reset component includes a first reset spring (84), a first limiting member (85) and a first knob (82); the first limiting member (85) and the first knob (82) are respectively installed at both ends of the first push rod (81); the first reset spring (84) is disposed on the first push rod (81) and located between the first knob (82) and the trigger (2).

4. A glue gun with easily adjustable glue dispensing volume and thrust according to any one of claims 1-3, characterized in that, A sleeve (87) is fitted onto the first gear part (811).

5. A glue gun with easily adjustable glue dispensing volume and thrust according to claim 4, characterized in that, The trigger (2) is provided with a guide bar.

6. A glue gun with easily adjustable glue dispensing volume and thrust, characterized in that, The gun body includes a gun body (1), a rubber sleeve (3), a front spring (5), a push plate (7), a thrust-stop assembly (4), a trigger (2), a second push rod (97), and a push rod (6); the rubber sleeve (3) is installed at the front end of the gun body (1); the push rod (6) is movably inserted through the gun body (1) and extends into the rubber sleeve (3); the gun body (1) has an inner cavity (11) through which the push rod (6) passes; the front spring (5) and the push plate (7) are sequentially arranged in the inner cavity (11) and sleeved on the push rod (6); the front end of the front spring (5) abuts against the gun body (1), and the rear end abuts against the push plate (7); the inner cavity (11) is provided with an abutment part (13). The upper end of the push plate (7) abuts against the abutting part (13); the trigger (2) is hinged to the gun body (1) through the second hinge shaft (91), and the second push rod (97) is installed on the upper end of the trigger (2). When the trigger rotates, it pushes the push plate (7) to swing through the second push rod (97) so as to drive the push rod (6) to move forward; characterized in that the trigger (2) is provided with a through hole for the second hinge shaft (91) to pass through; the gun body (1) is provided with a second strip hole (12), and a pair of inner walls of the second strip hole (12) are respectively provided with a third rack part (121) and a fourth rack part (122); The second hinge shaft (91) passes through the second strip hole (12) and can slide axially. The second hinge shaft (91) is also provided with a second gear part that meshes with the third rack part (121) and the fourth rack part (122). When the second hinge shaft (91) slides axially to the first interval position, the second gear part meshes with the third rack part (121) and the fourth rack part (122) at the same time; when the second hinge shaft (91) slides axially to the second interval position, the second gear part meshes with the fourth rack part (122) only.

7. A glue gun with easily adjustable glue dispensing volume and thrust according to claim 6, characterized in that, The width of the third rack portion (121) is greater than that of the fourth rack portion (122).

8. A glue gun with easily adjustable glue dispensing volume and thrust according to claim 7, characterized in that, The second gear section includes a first tooth segment (911) and a second tooth segment (912), with the first tooth segment (911) and the second tooth segment (912) spaced apart. When the second hinge shaft (91) is in the first interval position, the first tooth segment (911) simultaneously meshes with the third rack section (121) and the fourth rack section (122). When the second hinge shaft (91) slides axially to the second interval position, the second tooth segment (912) meshes with the fourth rack section (122).

9. A glue gun with easily adjustable glue dispensing volume and thrust according to any one of claims 6-8, characterized in that, The second hinge shaft (91) is provided with a reset assembly for resetting the second hinge shaft (91) after it is disengaged from the first interval position and maintaining it in the first interval position; the reset assembly includes a second reset spring (93), a second limiting member (96) and a second knob (94); the second limiting member (96) and the second knob (94) are respectively installed at both ends of the second hinge shaft (91); the second reset spring (93) is disposed on the second hinge shaft (91) and located between the second knob (94) and the trigger (2).

10. A glue gun with easily adjustable glue dispensing volume and thrust according to any one of claims 6-8, characterized in that, A bushing (95) adapted to the second gear is nested inside the through hole.

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