TW201902580A - Air flow rate indication structure of paint spray gun capable of avoiding occurrence of current and spark through mechanical indication structure to prevent the occurrence of danger condition of dust explosion caused by electric conduction and ignition during paint spraying - Google Patents

Abstract

An air flow rate indication structure of a paint spray gun comprises a paint spray gun, an indication unit, and a window. A floating member of the indication unit has floating displacement status through a flow rate of air passing through a communication channel. A gripping handle is further provided, on an outer side, with a through hole in communication with an air flow path and used with a window for viewing the floating position of the floating member caused by the flow rate pressure through the window, thereby learning the applied flow rate pressure and indication of the paint spray gun during a paint spraying operation, and thus enhancing the convenience of the structure usage and really avoiding occurrence of current and spark through mechanical indication structure to prevent the occurrence of danger condition of dust explosion caused by electric conduction and ignition during paint spraying, so as to greatly enhance the practicality of the structure.

Description

 Air flow marking structure of spray gun  

The invention relates to a spray gun structure, in particular to an air flow marking structure of a paint spray gun.

According to the general design of the spray gun, the spray gun body is mainly provided with a gun body suitable for hand grip, and a joint is arranged at the lower end of the handle body of the spray gun body to connect the air pressure device, and the pressure is set by the front end of the upper end of the handle portion. The handle is matched with a preset air volume adjustment knob on one side or the rear to control the air intake and the adjustment of the air intake amount, and a nozzle is arranged at the muzzle portion of the spray gun body, and a nozzle is arranged on the upper part of the spray gun body. The hole is combined for setting up the paint can, and at the rear end thereof, a flow adjustment knob is further provided, and the flow adjustment knob is used to adjust the amount of paint. According to the spray gun formed by the user, the user can use Through the adjustment of the air volume adjustment knob and the selection of the paint type of the nozzle, it can be adjusted according to the working environment, the paint target and various requirements to achieve the best paint quality.

In the design of the air flow indicator of the spray gun described above, please refer to the figures 9 and 10, mainly for the handle portion 51 of the spray gun body 50 is provided with a marking device 60, so that the flow of air through the flow can be The indicator device 60 senses and displays, and then is finely adjusted by the air volume adjustment knob. The indicator device 60 is an electronic type, has an electronic panel 61, a display panel 62, and a power supply to the electronic panel 61 and the The battery 63 of the display panel 62 reaches the air flow measurement through the built-in sensing component of the electronic panel 61, and then the measured data is indicated by the display panel 62 to achieve the air flow indicator.

However, it is not difficult to find out that the above-mentioned conventional structure has some shortcomings. The main reason is as follows: Its conventional marking device 60 is an electronic structure, requiring electrical energy and connection between panels, so that the electronic structure is powered by electricity. The supply will have the risk of generating electric current and sparks. The painting operation of the spray gun will spray the paint in the form of particles. If there is spark on the scene, it will cause the spray to have a momentary fire and distraction with the spray. In severe cases, there will be dangerous situations such as dust explosions. Therefore, it is dangerous to use the electronic type marking device 60. It is necessary to try to solve the improvement.

In view of this, the inventors have been engaged in the manufacturing development and design experience of related products for many years, and after detailed design and careful evaluation of the above objectives, the present invention has finally become practical.

The technical problem to be solved by the present invention is to provide an air flow indicating structure of a spray gun in view of the above-mentioned shortcomings existing in the prior art.

An air flow marking structure of a spray gun, comprising: a spray gun, an indicating unit and a window, wherein the handle of the spray gun has a hollow air passage, and a middle portion of the air flow passage has a stop portion, and the air flow passage has a stop portion The bottom of the air flow passage is formed with a continuous perforation, and a quick joint is arranged, and the air flow passage is further expanded from the upper end of the through hole to the lower end of the blocking portion to form a narrow narrow upper and upper conductive channel, and the outer side of the handle The recessed portion is provided with a through hole communicating with the air flow passage. The indicating unit comprises an upper member, an elastic member, a floating member and a lower retaining ring, and is sequentially assembled into the air flow passage. The upper blocking member is embedded in the blocking portion of the air flow passage for limiting the positioning of the elastic member. The floating member abuts against the elastic member, the top end has an indicating end, and the bottom end forms a guide. a flow cone portion for gas passage, the lower retaining ring being fixed to the through hole, thereby limiting the elastic member and the floating member to the air flow passage, and transmitting and lowering the displacement through the floating member to reach an indication of the air flow rate, The window system is closely fixed to The concave portion of the side of the handle is provided with a marking member between the concave portion and the window. The structure is configured to form an air flow marking structure of the spray gun.

The indicating end of the floating member and the guiding cone are formed in a hollow shape, and a through hole is formed on the outer circumference.

Wherein, a through hole is further disposed in the through hole, and the lower retaining ring is positioned upward by the spring.

Compared with the prior art, the floating part of the indicating unit is in a state of floating displacement through the flow of air through the conducting channel, and the outside of the handle is further provided with a through hole communicating with the air flow path, and is matched with a window.俾 Viewing the floating position of the floating piece due to the flow pressure in the window, and then knowing the flow pressure and marking applied by the spray gun in the painting operation, improving the convenience of the structure, and using the mechanical type The structure does prevent the generation of current and sparks, and at the same time prevents the danger of dust explosion caused by conduction and ignition during painting, which greatly improves the practicability of the structure.

〔this invention〕

10‧‧‧ spray gun

11‧‧‧Handle

12‧‧‧Air flow path

121‧‧ ‧ blocking

122‧‧‧through holes

123‧‧‧conductive channel

13‧‧‧Quick joint

14‧‧‧ recess

141‧‧‧through hole

15‧‧‧Air valve slot

151‧‧‧ Large diameter section

152‧‧‧Small path

16‧‧‧pressure handle

20‧‧‧Instruction unit

21‧‧‧Upper parts

22‧‧‧Flexible parts

23‧‧‧Floating parts

231‧‧‧Instruction

232‧‧‧Conduit cone

233‧‧‧through holes

24‧‧‧ Lower retaining ring

25‧‧‧ Spring

30‧‧‧Window

31‧‧‧Markings

40‧‧‧Regulator

41‧‧‧ knob

42‧‧‧ bushings

421‧‧‧Adjustment hole

43‧‧‧Spring parts

44‧‧‧ piston parts

45‧‧‧掣动杆

[study]

50‧‧‧gun body

51‧‧‧ handle

60‧‧‧ marking device

61‧‧‧Electronic panel

62‧‧‧ display panel

63‧‧‧Battery

Fig. 1 is a perspective view of the present invention.

Fig. 2 is an exploded view of the invention.

Figure 3 is a schematic cross-sectional view of the present invention and a schematic diagram of no air conduction.

Figure 4 is a partial cross-sectional view showing the airless conduction of the present invention. .

Figure 5 is a schematic diagram of the maximum air conduction of the present invention.

Figure 6 is a partial cross-sectional perspective view of the maximum air conduction of the present invention.

Figure 7 is a schematic illustration of the minimum air conduction of the present invention.

Figure 8 is a partial cross-sectional perspective view of the minimum air conduction of the present invention.

Figure 9: A schematic diagram of the prior art.

Figure 10 is a schematic partial cross-sectional view of the prior art.

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [simplified description of the drawings] as follows: First, please refer to Figures 1, 2 and 3 An air flow indicating structure of a spray gun includes: a spray gun 10, an indicating unit 20, and a window 30. The handle 11 of the spray gun 10 is hollow and has an air flow path 12, and the air flow path 12 There is a stop portion 121 at the middle portion, and a uniform through hole 122 is formed at the bottom of the air flow path 12, and a quick joint 13 is disposed in the same manner, and the air flow path 12 is formed on the two sides from the upper end of the through hole 122 to the lower end of the blocking portion 121. The recessed portion 14 is formed on the outer side of the handle 11. The recess 14 is provided with a through hole 141 communicating with the air flow passage 12. The indicating unit 20 includes an upper portion. The blocking member 21, an elastic member 22, a floating member 23 and a lower retaining ring 24 are sequentially assembled into the air flow passage 12, and the upper blocking member 21 is embedded in the blocking portion 121 of the air flow passage 12. For the elastic member 22 to limit the positioning, the floating member 23 is placed against the elastic member 22 The top end has a guiding end 231, and the bottom end forms a guiding cone 232 for gas to pass therethrough, and the indicating end 231 and the guiding cone 232 are hollow, and a through hole is formed on the outer circumference. 233, the lower retaining ring 24 is fixed to the through hole 122, and further into the through hole 122 to enter a spring 25, and the lower retaining ring 24 is positioned upward by the spring 25, thereby the elastic member 22 is And the floating member 23 is confined in the air flow passage 12, and is lifted and displaced in the air flow passage 12 by the floating member 23 to reach an indication of the air flow rate. The window 30 is closely fixed to the concave portion 14 on the side of the grip 11 An indicator member 31 is disposed between the recess 14 and the window 30.

The composition of the structure of the spray gun is as shown in FIGS. 2 and 3 . The spray gun 10 is disposed above the handle 11 and is provided with an air valve groove 15 communicating with the air flow passage 12 . The air valve groove 15 has a The large diameter section 151 and the small diameter section 152 are further provided with a regulating valve 40 for controlling the air flow. The regulating valve 40 mainly has a knob 41 and a sleeve which is deflected by the knob 41. The side of the sleeve 42 is provided with an adjusting hole 421 communicating with the air flow passage 12, and the sleeve 42 is hollowly fitted into a spring member 43, and a piston member 44 is passed through the spring member 43. The front portion abuts against the small diameter portion 152 to form a locked state, and a small diameter portion 152 of the damper rod 45 is disposed in the small diameter portion 152 of the air valve groove 15 to be placed against the piston member 44, and the shank of the front side of the handle 11 is utilized. 16 reaches the linkage of the raking rod 45, thereby pushing the piston member 44 to achieve air conduction, thereby allowing the air in the air flow passage 12 to be guided to the air valve groove 15 to provide the air pressure required for painting, in summary , to complete a spray gun structure.

The state in which the structure is actually used, as shown in Figs. 3 and 4, the spray gun 10 is connected to the high pressure air by the quick connector 13, and when the pressure handle 16 is not pressed to form a pressure maintaining state, please refer to the same. In the figure 6, the indicating unit 20 is placed against the bottom of the air flow passage 12 by the elastic member 22 due to the failure of the high-pressure air to be turned on. When the pressing handle 16 is pressed to perform the painting operation, the tilting lever 45 is subjected to the painting operation. The pressing handle 16 pushes against the piston member 44 to disengage the piston member 44 from the opening of the small diameter section 152, so that high-pressure air can enter the small diameter section 152 of the air valve groove 15, and then spray the paint through the high-pressure air to perform the painting operation. In this case, the floating member 23 is pushed up and displaced due to the high-pressure air conducting flow, and the displacement height of the indicating unit 20 can be viewed in the window 30, and the relative position of the indicating end 31 is located through the indicating end 231, and the current use is known. Air flow pressure.

Furthermore, the regulating valve 40 can be deflected by the knob 41 to deflect the air flow to achieve the air flow adjustment. Please refer to FIGS. 5 and 6 simultaneously, when the adjusting hole 421 of the sleeve 42 communicates with the air flow passage 12. When the apertures are completely matched, the maximum air conduction is generated, and the flow rate of the high-pressure air passing through the conduction channel 123 depends on the size of the through hole of the adjustment hole 421, so that the floating member 23 will increase in diameter with the adjustment hole 421. The floating height is further increased, thereby increasing the cross-sectional area of the conduction channel 123, increasing the flow rate of the high-pressure air through the conduction channel 123, and simultaneously viewing the floating height of the floating member 23 and its marked value via the window 30.

On the contrary, when the sleeve 42 is deflected to make the diameter of the communication hole 421 and the air flow passage 12 become smaller, please refer to the figures 7 and 8 at the same time, the air flow rate through the conduction channel 123 is relatively reduced, so that The floating member 23 is pushed by the high-pressure air and the height of the floating displacement is lowered, and the flow rate of the high-pressure air is supplied by the conducting channel 123, and the position of the floating member 23 and the pressure thereof are observed through the window 30.

With the structure of the above embodiment, the following benefits are obtained: the floating member 23 of the indicating unit 20 is in a state of floating displacement through the flow of air through the conducting channel 123, and the outside of the handle 11 is further provided with a The through hole 141 of the air flow passage 12 communicates with the window 30, and the floating position of the floating member 23 due to the flow pressure is observed in the window 30, thereby knowing the flow rate of the spray gun 10 applied in the painting operation. Pressure and marking, the convenience of using the structure is improved. It is through the mechanical type of marking structure, which avoids the generation of current and sparks. At the same time, it prevents the danger of dust explosion caused by conduction and ignition during painting, and greatly enhances the structure. Practicality.

In summary, the present invention has indeed achieved a breakthrough structural design, and has improved invention content, and at the same time, can achieve industrial utilization and progress, and the present invention is not found in any publication, but also novel, when In accordance with the provisions of the relevant laws and regulations of the Patent Law, the application for invention patents is filed according to law, and the examination authority of the bureau is required to grant legal patent rights.

The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; that is, the equivalent variations and modifications made by the scope of the present invention should still belong to the present invention. Within the scope of the patent.

Claims (3)

 An air flow marking structure for a paint spray gun, comprising: a spray gun, the handle of the spray gun has a hollow air passage, a middle portion of the air flow passage has a stop portion, and the bottom portion of the air flow passage is formed consistently The perforation is provided with a quick connector, and the air flow passage is further gradually expanded from the upper end of the through hole to the lower end of the blocking portion to form a lower narrow upper and a wider guiding channel, and the outer side of the handle is provided with a concave portion, and the concave portion is provided with a concave portion. a through hole communicating with the air flow passage; an indicating unit comprising an upper member, an elastic member, a floating member and a lower retaining ring, and sequentially incorporated into the air flow passage, the upper block a member is embedded in the air flow passage for limiting the positioning of the elastic member, the floating member is abutted against the elastic member, the top end has an indicating end, and the bottom end defines a flow guiding cone For the passage of the gas, the lower retaining ring is fixed to the through hole, thereby limiting the elastic member and the floating member to the air flow passage, and the lifting and lowering of the floating member reaches the indication of the air flow rate; The window system is closely fixed to the Side of the handle recess, and in between the window and the recess portion is provided with a marking member.    The air flow rate marking structure of the spray gun according to the first aspect of the invention, wherein the indicating end of the floating member and the flow guiding cone are formed in a hollow shape, and a through hole is formed in the outer circumference.    The air flow indicating structure of the spray gun according to the first aspect of the invention, wherein the through hole further has a spring, and the lower retaining ring is positioned upward by the spring.