TWM605127U - Tube diameter-adjustable dual-tube caulking gun - Google Patents

Abstract

An adjustable-diameter double-tube glue gun includes a body, a accommodating seat, a push rod unit, an operation unit and an adjustment unit. The accommodating seat has at least one concave arc surface, the push rod unit at least includes a first push rod and a second push rod extending along a center line, and the operating unit can move the push rod unit along a long axis Moving toward the inside of the accommodating seat, the adjustment unit is pivoted on the accommodating seat and rotates along the concave arc surface, and includes at least a first arc surface section and a second arc surface section. A first distance between the arc surface segment and the center line is greater than a second distance between the second arc surface segment and the center line, and the first arc surface segment and the second arc surface segment are used to support different The second pipe of pipe diameter. The overall configuration can be applied to double-tube plastic bottles with different diameters, and the applicability is wide.

Description

Adjustable diameter double-tube glue gun

The new model relates to a glue gun, in particular to a double-tube glue gun with adjustable tube diameter.

Because some special adhesive occasions need to use two glues to improve the cementing performance, and the mixing ratio of the two glues will vary due to different uses.

There is a glue gun suitable for double-tube rubber bottles and its adjustable pipe clamp structure (Taiwan Certificate No. M439526 Patent Case), which is to fasten one clamp body to the rubber tank seat of the silicone rubber gun, and then clamp the two The pieces are buckled in the dovetail groove of the inner clip part of the clip body, and each clip piece has a plurality of clips. When the clips are fastened to the clip body by the clip pieces, the silicone cans with different mixing ratios can be clamped.

Although this glue gun uses clips at different positions of the clips to be clamped on the clip body, and the diameter of the silicone tank to be clamped can be adjusted, the clip must be removed from the clip body when adjusting. It is cumbersome to remove the upper part, and then choose different clips to clamp the clip body.

In addition, the clips are easy to fall off from the clip body and are easily lost. Once the clip is lost, the glue gun cannot be used for multiple pipe diameters.

There is another glue gun barrel clamp structure suitable for double-barrel glue bottles (Taiwan Certificate No. I577456 Patent Case), which is to buckle two glue gun barrel clamps on the supporting bracket of a glue gun, each glue gun The pipe clamp has a clamp body, two outer buckles, two inner buckles, two front arcs, and two rear arcs that are integrally formed. The front and back arcs are arranged in front and back, and their curvatures can be the same or different, or can be arranged in a concentric or non-concentric manner, which is suitable for double-tube hoses of different pipe diameters.

Although this type of glue gun barrel clamp can position the double-tube type hose relative to the supporting bracket, the structure of the glue gun barrel clamp is slightly complicated. In addition, if better positioning between the glue gun barrel clamp and the supporting bracket is required, it may be difficult to assemble and adjust the position. If it is easier to assemble and adjust the position, the glue There must be a loose fit between the barrel clip and the supporting bracket, but the glue barrel clip is easy to fall off from the supporting bracket, and is also easy to lose.

Therefore, the purpose of the present invention is to provide a double-tube glue gun with adjustable pipe diameter which is easy to adjust and simple in structure.

Therefore, the adjustable-diameter double-tube glue gun of the present invention is suitable for glueing a glue bottle. The glue bottle has a first pipe and a second pipe connected in parallel to the first pipe. The glue gun includes a body, a accommodating seat, a push rod unit, an operation unit and an adjustment unit. The accommodating seat is installed on one side of the body and has a housing The accommodating space in which the plastic bottle is placed, and at least one concave arc surface adjacent to the accommodating space, the push rod unit is installed on the body, and includes at least one first push rod, and a first push rod A second push rod linked by a rod, the second push rod extends along a centerline, the operating unit is installed on the body, and the push rod unit can be moved toward the accommodating space along a long axis, the adjustment unit It is pivoted on the accommodating seat and generates rotation along the concave arc surface, and at least includes a first arc surface section and a second arc surface section adjacently arranged around the center line, the first arc surface section A first distance from the center line is greater than a second distance between the second arc surface section and the center line, and the first arc surface section and the second arc surface section are used to support pipes of different diameters. The second pipe.

The effect of the present invention is that the adjustment unit is pivoted on the accommodating seat and rotates along the concave arc surface, which is suitable for supporting rubber bottles with different pipe diameters, and has simple overall structure and easy operation.

1: Glue bottle

101: The first pipe

102: The second pipe

103: Collection joint

100: glue gun

10: body

11: Axle seat

111: middle hole

112: Shaft hole

12: handle

20: Holder

21: The first end wall

211: first pilot hole

212: second pilot hole

213: auxiliary hole

214: Pivot

22: second end wall

221: Slotting

23: first side wall

24: second side wall

25: arc slot

251: Bottom

252: upper end

253: Positioning Department

26: accommodation space

27: Concave arc surface

28: fixed plate

30: Putter unit

31: first putt

32: second putt

321: Rod

322: end piece

33: auxiliary putter

34: connecting seat

341: inner sliding hole

342: Outer Sliding Hole

35: button

36: first push

37: second push

40: operating unit

41: Trigger

42: Move block

43: first spring

44: control pressure plate

45: second spring

50: adjustment unit

501: adjustment piece

502: Operation Button

503: Screw

51: Flat part

511: Pivot

512: piercing

514: first end

515: second end

52: arc section

521: Bottom

522: Outer Surface

523: guide block

524: First arc segment

525: second arc segment

526: boss

53: shaft

531: Plane Department

532: arc face

54: Operation Department

100’: Glue gun

50’: adjustment unit

501: adjustment piece

502’: Operation button

503’: Screw

504’: Spring

53’: Hinge

531’: Plane

532’: Arc face

54’: Operation Department

53’: Hinge

541’: inner end face

542’: Card slot

543’: Card slot

526’: boss

527’: Card block

d1: first distance

d2: second distance

L: Centerline

X: Long axis

Y: horizontal axis

Z: longitudinal axis

The other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a three-dimensional assembly view of a first embodiment of the new adjustable-diameter double-tube glue gun; 2 is a partially enlarged schematic perspective view of the first embodiment; FIG. 3 is a perspective exploded view of the first embodiment; FIG. 4 is a perspective view of an adjustment unit of the first embodiment; Figure 5 is a combined cross-sectional view of the first embodiment; Figure 6 is a cross-sectional view along the line VI-VI in Figure 5; Figure 7 is a cross-sectional view along the line VII-VII in Figure 5; Figure 8 is A cross-sectional view along the line Ⅷ-Ⅷ in Fig. 5; Fig. 9 is an adjustment diagram of the first embodiment; Fig. 10 is a cross-sectional view along the line XX in Fig. 9; Fig. 11 is a new adjustable tube A schematic plan view of a second embodiment of a double-barrel glue gun; Figure 12 is an incomplete three-dimensional exploded schematic view of a third embodiment of the new adjustable double-barrel glue gun; and Figure 13 is A cross-sectional view of the third embodiment.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are represented by the same numbers.

1 to 3, a first embodiment of the new adjustable-diameter double-tube glue gun 100 is suitable for glueing a glue bottle 1 which has a first pipe 101, a A second pipe 102 connected to the first pipe 101 in parallel, and a collection joint 103 locked to one end of the first pipe 101 and the second pipe 102. The glue gun 100 includes a body 10 and a container. The seat 20, a push rod unit 30, an operation unit 40 and an adjustment unit 50.

The body 10 includes a shaft seat 11 and a handle 12 connected to the shaft seat 11. The shaft seat 11 has a central hole 111 and a shaft hole 112 connected to the central hole 111.

The accommodating seat 20 includes a first end wall 21 connected to the body 10, a second end wall 22 spaced apart from the first end wall 21 along a center line L, and a second end wall 22 connected to the first end wall 21 A first side wall 23 between the second end wall 22 and used to support the first tube 101, a second side wall spaced apart from the first side wall 23 along a horizontal axis Y perpendicular to the center line L 24. An arc groove 25 provided on the second side wall 24, and a fixing plate 28 fixed on the first end wall 21. The first end wall 21, the second end wall 22, the first side wall 23 and the second side wall 24 jointly define an accommodating space 26 for accommodating the rubber bottle 1. The first end wall 21 has a first guide hole 211, a second guide hole 212 arranged on one side of the first guide hole 211, and a second guide hole 212 arranged on the other side of the first guide hole 211. For the auxiliary hole 213, the second end wall 22 has a slot 221 for the collection joint 103 to pass through, and the first side wall 23 and the second side wall 24 each have an inner concave arc surface 27. The arc groove 25 is adjacent to the first end wall 21 and has a lower end 251, an upper end 252 opposite to the lower end 251, and two positioning portions 253 arranged between the lower end 251 and the upper end 252 and in the shape of a concave hole .

The push rod unit 30 is installed on the body 10 and the accommodating seat 20, and includes a first push rod 31 passing through the first guide hole 211, parallel to the first push rod 31 and passing through the first The second push rod 32 of the two guide holes 212, one is parallel to the first push rod 31 and penetrates The auxiliary push rod 33 of the auxiliary hole 212, a connecting seat 34 connected to one end of the first push rod 31, the second push rod 32 and the auxiliary push rod 33, and a connecting seat 34 that is locked to the connecting seat 34 and the The button 35 of the first push rod 31, the first push rod 31 and the auxiliary push rod 33 are connected to a first push plate 36, and the second push rod 32 is connected to a second push plate 37. The first push rod 31 passes through the middle hole 111 of the shaft base 11 and the shaft hole 112. The second push rod 32 of this embodiment has a rod 321 extending along the center line L, and an intersecting connection connected to the The end piece 322 of the rod body 321 is integrally formed with the end piece 322 of the rod body 321. The cross section of the rod body 321 and the end piece 322 parallel to the center line L is L-shaped and can be opposite to the first push rod 31 By adjusting the spacing, the width of the rod body 321 corresponding to a longitudinal axis Z perpendicular to the center line L and the transverse axis Y is smaller than the width of the end piece 322 corresponding to the longitudinal axis Z. With reference to Figures 7 and 8, the connecting seat 34 has a rectangular inner sliding hole 341 corresponding to the centerline L and perpendicular to the centerline L, and an inner sliding hole 341 connected to the inner sliding hole along the centerline L 341 and an oblong outer sliding hole 342 with a cross section perpendicular to the center line L. The width of the outer sliding hole 342 corresponding to the longitudinal axis Z is smaller than the width of the inner sliding hole 341 corresponding to the longitudinal axis Z, The rod body 321 of the second push rod 32 passes through the outer sliding hole 342 and the second guide hole 212, and the end piece 322 is slidably disposed in the inner sliding hole 341 and the outer sliding hole along the transverse axis Y 342 in.

The operating unit 40 includes a trigger 41 pivotally connected to the shaft base 11, a set of detent blocks 42 set outside the first push rod 31 and located in the middle hole 111, and a detent block 42 that springs against the detent block 42 The first spring 43 between the body 10 and the main body 10 is set outside the first push rod 31 The control plate 44 is located between the main body 10 and the connecting seat 34, and a second spring 45 springs between the main body 10 and the control plate 44. Pressing the trigger 41 can trigger the switch The moving block 42 drives the first push rod 31, the auxiliary push rod 33 to push toward the inside of the first tube 101, and can drive the second push rod 32 toward the inside of the second tube 102 and toward a line parallel to the center line L When pushing the control plate 44 in the long axis X, the first push rod 31, the auxiliary push rod 33 and the second push rod 32 can be pulled back in opposite directions.

4, the adjustment unit 50 is pivoted on the accommodating seat 20 and rotates along the concave arc surface 27 of the second side wall 24, the adjustment unit 50 includes a rotatably pivoted on the fixed plate 26 The adjusting member 501, an operating button 502 rotatably arranged on the adjusting member 501, and a screw 503 threaded through the adjusting member 501 and screwed on the operating button 502, the adjusting member 501 has a A flat plate portion 51 inside the end wall 21 and arranged inside the accommodating space 26, an arc plate portion intersectingly connected to the flat plate portion 51 and capable of generating arc-shaped rotation relative to the concave arc surface 27 of the second side wall 24 52, and an operating portion 54 connected to the arc portion 52. The flat portion 51 has a pivot portion 511 pivoted on the fixing plate 28 and a through slot 512 corresponding to the second guide hole 212 and for the second push rod 32 to pass through. The slot 512 has an oblong shape and has a first end 514 and a second end 515 opposite to the first end 514. The arc portion 52 has a bearing surface 521 opposite to the second tube 102, an outer surface 522 opposite to the bearing surface 521 and opposite to the inner concave arc surface 27 of the second side wall 24, and two convex surfaces A guide block 523 slidably abutting the inner concave arc surface 27 on the outer surface 522, and a guide block 523 protruding from the outer surface The boss 526. The bearing surface 521 has a first arc surface section 524 and a second arc surface section 525 adjacently arranged around the center line L, and a first arc surface section 524 and the center line L The distance d1 is greater than a second distance d2 between the second arc surface section 525 and the center line L (see FIG. 6), and the first arc surface section 524 and the second arc surface section 525 are used to support different pipe diameters. The first arc surface section 524 takes the center point of the first end 514 as the center to form an arc surface shape, and the second arc surface section 525 takes the center point of the second end 515 as the center It forms a circular arc surface shape, and the curvature of the second arc surface section 525 is greater than the curvature of the first arc surface section 524. The guide blocks 523 are respectively curved and wedge-shaped ribs extending around the pivoting portion 511 as the center of rotation. The operating button 502 has a shaft 53 with a shaft set on the boss 526, and an operating portion 54 connected to the shaft 53. The shaft 53 has a pair of oppositely arranged flat portions 531, and a pair of oppositely arranged and connected In the arc surface 532 between the flat surfaces 531, the diameter between the arc surface portions 532 is greater than the thickness between the flat surfaces 531, and the diameter between the arc surface portions 532 is not greater than that of the positioning portions 253 Inner diameter, the operating portion 54 is connected to the end of the rotating shaft 53 and protrudes outside the receiving seat 20.

In order to further understand the effects of the cooperation of the various elements of the present invention, the technical means used, and the expected effects, the following will be explained again. It is believed that a deeper and specific understanding of the present invention can be obtained from this.

As shown in Figures 5 to 8, when the entire assembly is completed and the plastic bottle 1 has been installed and positioned in the accommodating space 26 of the accommodating seat 20, the first tube 101 of the plastic bottle 1 is The first side wall 23 is supported by the concave arc surface 27, the second pipe 102 is supported by the supporting surface 521 of the adjusting unit 50, and the rubber bottle 1 is stably positioned relative to the receiving seat 20. And as shown in Figures 5 and 6, it is shown that the adjustment member 50 is located at a first position. At this time, the first arcuate section 524 is supported by the second tube 102, and the second push rod 32 corresponds to the wear At the first end 514 of the slot 512, the operating button 502 is positioned close to one of the pair of positioning portions 253 of the lower end 251 of the arc slot 25. As shown in FIG. 9, the arcs of the rotating shaft 53 of the operating button 502 The face 532 corresponds to the positioning parts 253, and the operating button 502 is positioned relative to the receiving seat 20. The first arc surface section 524 is used to support the second pipe 102 with a larger pipe diameter. And the first push rod 31, the auxiliary push rod 33, and the first push plate 36 correspond to the first pipe 101, the second push rod 32 and the second push plate 37 correspond to the second pipe 102, when When the operator presses the trigger 41, moves the detent block 42, the first push rod 31, and moves the push rod unit 30 as a whole along the long axis X toward the accommodating space 26, they can simultaneously The first pipe 101 and the second pipe 102 are pushed, and a predetermined mixing ratio of glue is extruded from the collection joint 103.

As shown in FIG. 9 again, when the plastic bottle 1 with a different mixing ratio is to be replaced, when the accommodating space 26 of the accommodating seat 20 is empty, the operator first turns the operating portion 54 and makes the operating button The arc portions 532 of the shaft 53 of the 502 are staggered with the positioning portions 253, and the flat portions 531 correspond to the extending direction of the arc groove 25. The operator then pulls the operating portion 54 and makes the operating portion 54 When the lower end 501 of the arc slot 25 rotates toward the upper end 502 of the arc slot 25, the adjustment unit 50 will rotate around the center point of the pivot portion 511 The center of movement generates a rotation, and the through slot 512 also moves upward. The second push rod 32 will move toward the first push rod 31 when being pressed by the through groove 512, and the end piece 322 will slide in the inner hole. Sliding in 341 (in conjunction with FIG. 8 ), the rod 321 will slide in the outer sliding hole 342 and the second guide hole 212. At this time, the second push rod 32 corresponds to the second end 515 of the slot 512, and the operator rotates the operating portion 54 and makes the arc portions 532 of the rotating shaft 53 correspond to the positioning portions 253. The second arcuate surface section 525 is used to support the second pipe 102 with a smaller pipe diameter, which is suitable for the rubber bottles 1 with different mixing ratios (see FIG. 10).

That is, as shown in FIGS. 6 and 10, when the second push rod 32 is located at the first end 514, the diameter of the second pipe 102 supported by the first curved section 524 is larger than that of the second push rod 32 The diameter of the second pipe 102 supported by the second arcuate section 525 when located at the second end 515. Therefore, the setting and operation of the adjusting unit 50 can be applied to the rubber bottles 1 with different mixing ratios, and the applicability is wide.

In addition, when the diameter of the rubber bottle 1 to be clamped is adjusted, the adjustment unit 50 only needs to be rotated. The purchaser of the glue gun does not need to be disassembled and assembled, and the operation is easier. And there is no need to disassemble parts, and the disassembled parts are easily lost.

As shown in Figure 11, a second embodiment of the new adjustable-diameter double-tube glue gun 100 differs from the first embodiment in that: the second push rod 32' of the push rod unit 30' The end piece 322' adopts flat-head screws and is detachably locked to the end of the rod body 321'. The second embodiment of the new adjustable-diameter double-barrel glue gun 100 can also achieve the same purpose as the first embodiment, and the second push rod 32' of the second embodiment is made more easily. Easy to reduce manufacturing costs.

As shown in FIGS. 12 and 13, a third embodiment of the new adjustable-diameter double-tube glue gun 100' differs from the first embodiment in that the operating button 502' of the adjustment unit 50' The operating portion 54' also has an inner end surface 541' adjacent to the rotating shaft 53', and the inner end surface 541' has two pairs of slots 542', 543' separated by 90 degrees, the slots 542', 543 'Arranged in a cross shape, the boss 526' has two locking blocks 527' that can be inserted into a pair of slot 542' (or slot 543'). The adjustment unit 50' also includes a screw 503 The spring 504' between'and the adjusting member 502', the spring 504' is a compression spring, and its elastic force is constant so that the slot 542' (or slot 543') of the operating button 502' faces the locking blocks 527' The trend of mosaicism.

With the third embodiment of the present invention, when the arc surfaces 532' of the rotating shaft 53' correspond to the positioning portions 253, the clamping blocks 527' are embedded in the clamping slots 543' to make the operation The button 502 ′ is positioned relative to the receiving seat 20. When the adjusting member 501' is to be adjusted, the operating portion 54' is first pulled (the spring 504' is compressed), the slots 542' are removed from the locking blocks 527', and the operating portion 54' is rotated to make The arc portions 532' of the rotating shaft 53' are staggered from the positioning portions 253, the flat portions 531' correspond to the extending direction of the arc groove 25, and when the adjusting member 501' is adjusted to a desired position, Then, the operating portion 54' is released, and the release elastic force of the spring 504' can be used to make the slots 543' nest in the blocks 527'.

It is worth mentioning that the operating unit 40 is not based on the above-mentioned embodiment of the present invention. The structure is limited, as long as the first push rod 31, the auxiliary push rod 33, and the second push rod 32 can move toward the first pipe 101 and the second pipe 102, they are all in the present invention Within the scope.

In summary, the new adjustable-diameter double-tube glue gun is suitable for supporting rubber bottles with different tube diameters, and has a simple overall structure and easy operation, which can indeed achieve the purpose of new cost.

However, the above-mentioned are only examples of the present model. When the scope of implementation of the present model cannot be limited by this, all simple equivalent changes and modifications made in accordance with the patent scope of the present model application and the contents of the patent specification still belong to This new patent covers the scope.

1: Glue bottle

101: The first pipe

102: The second pipe

103: Collection joint

100: glue gun

10: body

11: Axle seat

111: middle hole

112: Shaft hole

12: handle

20: Holder

21: The first end wall

211: first pilot hole

212: second pilot hole

213: auxiliary hole

22: second end wall

221: Slotting

23: first side wall

24: second side wall

25: arc slot

26: accommodation space

27: Concave arc surface

28: fixed plate

30: Putter unit

31: first putt

32: second putt

321: Rod

322: end piece

33: auxiliary putter

34: connecting seat

35: button

36: first push

37: second push

40: operating unit

41: Trigger

42: Move block

43: first spring

44: control pressure plate

45: second spring

50: adjustment unit

501: adjustment piece

502: Operation Button

503: Screw

51: Flat part

511: Pivot

512: piercing

52: arc section

L: Centerline

X: Long axis

Y: horizontal axis

Z: longitudinal axis

Claims (10)

An adjustable-diameter double-tube glue gun suitable for glueing a glue bottle. The glue bottle has a first tube and a second tube connected in parallel to the first tube. The glue gun includes : An ontology An accommodating seat installed on one side of the body and having an accommodating space for accommodating the rubber bottle, and at least one concave arc surface adjacent to the accommodating space; A push rod unit installed on the body and includes a first push rod and a second push rod linked by the first push rod, the second push rod extending along a center line; An operating unit installed on the main body and capable of moving the push rod unit along a long axis toward the accommodating space; and An adjustment unit is pivoted on the accommodating seat and rotates along the inner concave arc surface, and at least includes a first arc surface section and a second arc surface section adjacently arranged around the center line. A first distance between an arc section and the center line is greater than a second distance between the second arc section and the center line, and the first arc section and the second arc section are used for supporting A second pipe with a different diameter. The adjustable-diameter double-tube glue gun according to claim 1, wherein the accommodating seat further includes a first end wall connected to the operating unit, and a first end wall spaced apart from the first end wall along the center line Is provided with a second end wall, a first side wall connected between the first end wall and the second end wall and used to support the first pipe, and a first side wall along a horizontal axis perpendicular to the center line and the The first side wall is spaced apart from the second side wall, and an arc groove is provided on one of the first end wall and the second side wall. There are two concave arc surfaces and are respectively provided on the first side wall and the second side wall. The second side wall, the first end wall has a first guide hole for the first push rod to pass through, and a second guide hole for the second push rod to pass through and is an oblong hole, the second push rod It can move horizontally along the transverse axis and in the second guide hole, and can adjust the distance relative to the first push rod. The adjustment unit further includes a flat plate portion on one side of the first end wall and an intersecting connection On the flat part, an arc plate part capable of generating arc-like rotation relative to the concave arc surface of the second side wall, and an operating part connected to one of the flat part and the arc plate part, the flat part having A pivotal portion that can pivot relative to the first end wall, and a through slot corresponding to the second guide hole for the second push rod to penetrate, the arc plate portion has a portion opposite to the second tube A bearing surface, and at least one guide block opposite to the bearing surface and slidably abutting against the inner concave arc surface, the first arc surface section and the second arc surface section are disposed on the bearing surface, the The operating part protrudes from the arc groove outside the accommodating seat. The adjustable-diameter double-tube glue gun according to claim 2, wherein the arc groove of the accommodating seat is provided on the second side wall and adjacent to the first end wall, and the flat plate portion of the adjustment unit is located at the The inner side of the first end wall is arranged inside the accommodating space. The adjustable-diameter double-tube glue gun according to claim 3, wherein the arc groove of the accommodating seat has a lower end, an upper end opposite to the lower end, and at least two pairs disposed between the lower end and the upper end A positioning portion in the shape of a recessed hole, the adjustment unit further includes an adjustment piece, an operation button rotatably arranged on the adjustment piece, and a screw threaded through the adjustment piece and screwed to the operation button, The flat plate portion and the arc plate portion are located on the adjusting member, and the arc plate portion also has an outer surface opposite to the bearing surface and opposite to the inner concave arc surface of the second side wall, and a convexly disposed on the outer surface The boss, the operating button has a shaft with a shaft set on the boss, the shaft has a pair of oppositely arranged flat parts, and a pair of oppositely arranged arc parts connected between the flat parts, the The diameter between the arc portions is greater than the thickness between the flat portions, the diameter between the arc portions is not greater than the inner diameter of the positioning portions, and the operating portion is connected to the rotating shaft. The adjustable-diameter double-tube glue gun according to claim 4, wherein the operating portion of the operating button of the adjustment unit further has an inner end surface adjacent to the rotating shaft, and the inner end surface has at least two spaced 90 degrees apart. The boss has at least one clamping block that can be inserted into one of the grooves. The adjusting unit further includes a spring arranged between the screw and the adjusting piece. The elastic force of the spring constant makes the operation The tendency of the button's card slot to fit into the card block. The adjustable-diameter double-tube glue gun according to claim 2, wherein the arc plate portion of the adjustment unit further has an outer surface opposite to the bearing surface and opposite to the concave arc surface, and the guide block There are two in number, which are respectively protruding on the outer surface and extending to form a curved wedge-shaped convex rib with the pivot part as the rotation center, and the operating part is installed on the arc plate part. The adjustable-diameter double-tube glue gun according to claim 2, wherein the slot of the adjustment unit is oblong, and has a first end and a second end opposite to the first end. At the end, the first arc surface section takes the center point of the first end as the center to form an arc surface shape, and the second arc surface section takes the center point of the second end as the center point to form an arc surface shape, the The curvature of the second arcuate surface section is greater than the curvature of the first arcuate surface section. When the second push rod is located at the first end, the diameter of the second pipe supported by the first arcuate surface section is larger than that of the second push rod The diameter of the second pipe supported by the second arc surface section when located at the second end. The adjustable-diameter double-tube glue gun according to claim 1, wherein the push rod unit further includes a connecting seat connected between the first push rod and the second push rod, the connecting seat having An inner sliding hole corresponding to the center line, and an outer sliding hole connected to the inner sliding hole along the center line, the outer sliding hole corresponding to a longitudinal axis perpendicular to the center line and the transverse axis The width is smaller than the width of the inner sliding hole corresponding to the longitudinal axis, the second push rod has a rod extending along the center line and passing through the outer sliding hole, the second guide hole, and the through groove, and a An end piece intersectingly connected to the rod body, the end piece being slidably disposed in the inner sliding hole along the transverse axis, and the width of the rod body corresponding to the longitudinal axis is smaller than that of the end piece corresponding to the longitudinal axis The width of the sliding hole can be slid along the horizontal axis. The adjustable-diameter double-tube glue gun according to claim 7, wherein the rod body of the second push rod of the push rod unit and the end piece are integrally formed, and the cross section parallel to the center line is L-shaped. The adjustable-diameter double-tube glue gun according to claim 7, wherein the operating unit includes a trigger pivotally connected to the body, a set of detent blocks provided outside the first push rod, and A first spring elastically abutting between the detent block and the body, a control pressure plate set on the outside of the first push rod and located between the body and the connecting seat, and a control plate that elastically resists the body and the body The second spring between the control plate and the pressing the trigger can trigger the detent block to drive the first push rod and the second push rod toward the inside of the first pipe and the second pipe to press the control The pressing plate can pull back the first push rod and the second push rod in reverse.

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