Dust blowing gun

Abstract

The utility model discloses a dust blowing gun which is easy to assemble and better in stability and sealing performance. According to the technical scheme, the gun comprises a gun handle and a trigger hinged to the lower end of the gun handle, an air inlet channel and an outlet channel are formed in the gun handle, and an airflow adjusting valve is arranged at the position, corresponding to the position between the air inlet channel and the outlet channel, of the upper end of the gun handle. The airflow adjusting valve comprises a valve element installed in the gun handle in a telescopic mode, a rotary switch rotatably arranged above the valve element, a valve element spring arranged between the rotary switch and the valve element and a rotary knob connected to the top of the rotary switch. The valve element is provided with a third sealing ring matched with the gun handle in a sealing mode, and the lower end of the valve element abuts against the trigger.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of pneumatic equipment, especially relates to a dust blowing gun. BACKGROUND

[0002] The dust blowing gun is a kind of tool for cleaning dust.The structure of conventional dust blowing gun with air flow adjusting function is shown in the Chinese utility model patent with the authorization announcement number "CN 214600781 U" and the name "dust blowing gun with excellent air tightness", which comprises a gun handle, a trigger hinged to the lower end of the gun handle, an air inlet channel and an outlet channel provided on the gun handle, an air flow adjusting valve provided between the air inlet channel and the outlet channel on the upper end of the gun handle, a valve core telescopically installed in the gun handle, a rotary switch rotatably arranged above the valve core, a valve core spring arranged between the rotary switch and the valve core, a knob connected to the top of the rotary switch, a sealing ring provided on the valve core and sealingly matched with the gun handle, and the lower end of the valve core abutting against the trigger.The existing defects are:1, the rotary switch is limited in the gun handle by a plug element, and the plug element is connected with the gun handle by threads, so the assembly is more troublesome and prone to loosening;2, the stability and sealing performance of the air flow adjusting valve are poor. CONTENT OF UTILITY MODEL

[0003] The utility model solves the technical problem to provide a kind of dust blowing gun that is easy to assemble, and stability and sealing performance are better.

[0004] To solve the above problems, the utility model adopts the technical scheme, which comprises a gun handle, a trigger hinged to the lower end of the gun handle, an air inlet channel and an outlet channel provided on the gun handle, an air flow adjusting valve provided between the air inlet channel and the outlet channel on the upper end of the gun handle, a valve core telescopically installed in the gun handle, a rotary switch rotatably arranged above the valve core, a valve core spring arranged between the rotary switch and the valve core, a knob connected to the top of the rotary switch, a third sealing ring provided on the valve core and sealingly matched with the gun handle, and the lower end of the valve core abutting against the trigger, characterized in that: the rotary switch comprises a first cylindrical portion, a second cylindrical portion and a third cylindrical portion gradually decreasing in size, the first cylindrical portion is provided with a valve opening degree adjusting port on one side and a first sealing ring and a first positioning flange on the upper end, the second cylindrical portion is provided with a spring positioning groove inside and a cylindrical mounting buckle outside, the third cylindrical portion is provided with a key groove, the knob is rotatably arranged on the knob mounting seat on the upper end of the gun handle and is provided with a key connected with the key groove on the bottom, and the cylindrical mounting buckle is connected with the clamping groove on the knob mounting seat through the elastic clamping of the connecting wall on both sides.

[0005] The valve core upper end is provided with a positioning guide column, the valve core spring lower end is sleeved on the positioning guide column, and the upper end is arranged in the spring positioning groove.

[0006] The dust blowing gun is characterized in that the knob mounting seat top is provided with a first positioning block, and the knob is internally provided with a second positioning block matched with the first positioning block.

[0007] The dust blowing gun is characterized in that the first positioning block is provided with a positioning groove extending into the knob mounting seat, and the cylindrical mounting buckle side wall is provided with a positioning rib matched with the positioning groove.

[0008] The dust blowing gun is characterized in that the valve core is internally provided with an upper end provided with a piston, and the piston upper end is provided with a second sealing ring and a second positioning flange, and the gun handle is internally provided with a second positioning step matched with the second positioning flange.

[0009] The dust blowing gun is characterized in that the cylindrical mounting buckle bottom is provided with a sliding ring abutting against the first positioning flange.

[0010] The dust blowing gun is characterized in that the valve opening degree adjusting port is provided with an inclined surface on one side.

[0011] The dust blowing gun is characterized in that the gun handle bottom is provided with a trigger positioning step.

[0012] The dust blowing gun has the following advantages: 1. The rotary switch is limited in the gun handle by the cylindrical mounting buckle, so that the installation is more convenient, and the cylindrical mounting buckle is not easy to loosen after being connected; 2. The positioning structures are arranged between the rotary switch, the valve core and the gun handle and between the rotary switch and the valve core, so that the stability and sealing performance of the flow regulating valve are better.

[0013] The utility model makes further explanation in connection with the attached drawings of the specification. DRAWINGS

[0014] Figure 1 It is the structure schematic diagram of the dust blowing gun of the utility model;

[0015] Figure 2 It is the sectional view of the dust blowing gun of the utility model;

[0016] Figure 3 It is the explosion drawing of the dust blowing gun of the utility model;

[0017] Figure 4 It is the structure schematic diagram of the rotary switch of the utility model;

[0018] Figure 5 It is the structure schematic diagram of the gun handle of the utility model;

[0019] Figure 6 is the structural schematic view of the knob of the utility model;

[0020] Figure 7 is the structural schematic view of the cylindrical mounting buckle of the utility model;

[0021] Figure 8 is the structural schematic view of the valve core of the utility model. DETAILED DESCRIPTION

[0022] Referring to Figures 1-8 the utility model discloses a dust blowing gun, including handle 1 and trigger 2 that are hinged to the lower end of handle 1 through pin shaft 36. Handle 1 is equipped with air inlet channel 3 and outlet channel 4, and the upper end of handle 1 is equipped with airflow regulating valve at the intersection of air inlet channel 3 and outlet channel 4. The front end of the outlet channel 4 of the handle 1 is connected with different gun heads according to needs. The airflow regulating valve includes telescopic valve core 5 installed in the handle 1, rotatable rotary switch 6 arranged above the valve core 5, valve core spring 7 arranged between the rotary switch 6 and the valve core 5, and knob 8 connected to the top of the rotary switch 6. The valve core 5 is equipped with a third sealing ring 35 that seals with the handle 1, and the lower end of the valve core 5 abuts against the trigger 2. The rotary switch 6 includes gradually reduced first cylinder part 9, second cylinder part 10 and third cylinder part 11. One side of the first cylinder part 9 is equipped with valve opening degree adjusting port 12, which usually accounts for 1 / 4 of the first cylinder part 9. The upper end of the first cylinder part 9 is equipped with first sealing ring 13 and first positioning flange 14. The second cylinder part 10 is equipped with spring positioning groove 15, and the outside of the second cylinder part 10 is sleeved with cylindrical mounting buckle 16. The third cylinder part 11 is equipped with key groove 17. The knob 8 is rotatably arranged on the knob mounting seat 18 at the upper end of the handle 1 to ensure the stability of the knob mounting seat 18, and the bottom of the knob 8 is equipped with key 19 connected with the key groove 17 to realize the convenient connection between the knob 8 and the rotary switch 6. The cylindrical mounting buckle 16 is connected with the clamping groove 21 on the knob mounting seat 18 through the elastic clamping buckle 20 on both sides. The upper end of the valve core 5 is equipped with positioning guide column 22, the lower end of the valve core spring 7 is sleeved with the positioning guide column 22, and the upper end of the valve core spring 7 is arranged in the spring positioning groove 15. The handle 1 is equipped with first positioning step 23 corresponding to the first positioning flange 14. When the first positioning flange 14 is positioned with the first positioning step 23, the first sealing ring 13 is sealed in the inner wall of the handle 1. When the valve core 5 is compressed by the trigger 2, the positioning guide column 22 at the top of the valve core 5 is inserted into the spring positioning groove 15 of the second cylinder part 10 to ensure the stability of the sliding of the valve core 5.

[0023] Preferably, the knob mounting seat 18 top is provided with a first positioning block 24, the knob 8 is provided with two second positioning blocks 25 which are positioned with the first positioning block 24. One of the second positioning blocks 25 is positioned with the first positioning block 24 as the maximum opening, and the other second positioning block 25 is positioned with the first positioning block 24 as the minimum opening (closed). To facilitate user adjustment.

[0024] Preferably, the first positioning block 24 is provided with a positioning groove 26 extending into the knob mounting seat 18, and the cylindrical mounting buckle 16 side wall is provided with a positioning rib 27 which is positioned with the positioning groove 26. Through the cooperation of the positioning groove 26 and the positioning rib 27, the precise installation and positioning of the knob mounting seat 18 is realized.

[0025] Preferably, the valve core 5 is provided with a piston 28 at the upper end, and the upper end of the piston 28 is provided with a second sealing ring 29 and a second positioning flange 30. Through the cooperation of the piston 28 and the second sealing ring 29, the passage between the inlet passage 3 and the outlet passage 4 is closed, so as to achieve better sealing effect. The gun handle 1 is provided with a second positioning step 31 which is adapted to the second positioning flange 30, so as to play a positioning role on the valve core 5, so as to ensure the stability of the valve core 5 after closing.

[0026] Preferably, the bottom of the cylindrical mounting buckle 16 is provided with a sliding ring 32 abutting against the first positioning flange 14. Through the surface contact between the sliding ring 32 and the first positioning flange 14, the contact area is reduced, so that the rotation of the rotary switch 6 is more smooth.

[0027] Preferably, the valve opening adjusting port 12 is provided with an inclined surface 33 on one side. When the rotary rotary switch 6 is opened, the opening between the inclined surface 33 and the inlet passage 3 will gradually increase, so as to more accurately control the air flow.

[0028] Preferably, the bottom of the gun handle 1 is provided with a trigger positioning step 34, so as to play a positioning role on the trigger 2 after opening to the position.

[0029] As described above, the utility model is not limited in any form, although the utility model has disclosed the above-mentioned preferred embodiments, however, it is not intended to limit the utility model, any person skilled in the art, without departing from the technical scheme range of the utility model, can make some changes or modifications to the above-mentioned disclosed structure and technical content for equivalent embodiments, but any simple modification, equivalent change and modification of the above-mentioned embodiments according to the technical essence of the utility model, all still belong to the technical scheme range of the utility model.

Claims

1. A blower gun, comprising a handle (1) and a trigger (2) hinged to the lower end of the handle (1), wherein the handle (1) is provided with an air inlet channel (3) and an outlet channel (4), and an airflow regulating valve is provided at the upper end of the handle (1) between the air inlet channel (3) and the outlet channel (4), wherein the airflow regulating valve comprises a retractable valve core (5) installed in the handle (1), a rotatable rotary switch (6) disposed above the valve core (5), a valve core spring (7) disposed between the rotary switch (6) and the valve core (5), and a knob (8) connected to the top of the rotary switch (6), wherein the valve core (5) is provided with a third sealing ring (35) sealingly engaging with the handle (1), and its lower end abuts against the trigger (2), characterized in that: The rotary switch (6) includes a first column (9), a second column (10), and a third column (11) that gradually shrink. The first column (9) has a valve opening adjustment port (12) on one side and a first sealing ring (13) and a first positioning flange (14) on the upper end. The second column (10) has a spring positioning groove (15) inside and a cylindrical mounting buckle (16) on the outside. The third column (11) has a keyway (17). The knob (8) is rotatably mounted on the knob mounting seat (18) at the upper end of the gun handle (1) and has a key (19) at the bottom that connects to the keyway (17). The cylindrical mounting buckle (16) is connected to the slot (21) on the knob mounting seat (18) through the wall-connecting elastic buckles (20) on both sides. The valve core (5) is provided with a positioning guide post (22) at the upper end. The lower end of the valve core spring (7) is sleeved on the positioning guide post (22) and the upper end is placed in the spring positioning groove (15). The gun handle (1) is provided with a first positioning step (23) that is adapted to the first positioning flange (14).

2. The blower gun according to claim 1, characterized in that: The knob mounting base (18) has a first positioning block (24) on its top, and the knob (8) has two second positioning blocks (25) that are positioned and cooperate with the first positioning block (24).

3. The blower gun according to claim 2, characterized in that: The first positioning block (24) is provided with a positioning groove (26) extending into the knob mounting base (18), and the side wall of the cylindrical mounting buckle (16) is provided with a positioning rib (27) that positions and cooperates with the positioning groove (26).

4. The blower gun according to claim 1, characterized in that: The valve core (5) is provided with a piston (28) at its upper end, and the piston (28) is provided with a second sealing ring (29) and a second positioning flange (30) at its upper end. The gun handle (1) is provided with a second positioning step (31) that is adapted to the second positioning flange (30).

5. The blower gun according to claim 1, characterized in that: The bottom of the cylindrical mounting buckle (16) is provided with a sliding ring (32) that abuts against the first positioning flange (14).

6. The blower gun according to claim 1, characterized in that: The valve opening adjustment port (12) has an inclined surface (33) on one side.

7. The blower gun according to claim 1, characterized in that: The bottom of the gun handle (1) is provided with a trigger positioning step (34).

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