Head of a Spray Gun

Abstract

A head of a spray gun mounted on a core inside a spray gun, comprises a nozzle disposed at an end of the core; a sprayer covered at the front of the nozzle, the sprayer having a plurality of side air passing blocks; a rotatable air volume regulating sleeve disposed at the rear of the nozzle; a plurality of air regulating holes disposed on the rotatable air volume regulating sleeve; a sprayer nut for enclosing the nozzle, the sprayer, and the rotatable air volume regulating sleeve; wherein the nozzle has a plurality of side air passing holes, when the rotatable air volume regulating sleeve rotates, at least one air passing hole overlaps with at least one air regulating hole, overlapping between at least one air passing hole and at least one air regulating hole adjust an air volume passing through the head of a spray gun. The present invention can perform high-precision air volume regulation and is particularly suitable for high-precision spraying operations.

Claims

1. A head of a spray gun mounted on a core inside a spray gun, comprising: a nozzle disposed at an end of the core, the nozzle having a front and a rear; a sprayer covered at the front of the nozzle, the sprayer having a front surface and a plurality of side air passing blocks on the front surface of the sprayer; a rotatable air volume regulating sleeve disposed at the rear of the nozzle, the rotatable air volume regulating sleeve having a front; a sprayer nut for enclosing the nozzle, the sprayer, and the rotatable air volume regulating sleeve; wherein the rotatable air volume regulating sleeve has a flange at the front of the rotatable air volume regulating sleeve, the flange has a front surface, the front surface of the flange abuts the nozzle, and the front surface of the flange has a plurality of air regulating holes; the nozzle has a plurality of side air passing holes, when the rotatable air volume regulating sleeve rotates, at least one air passing hole overlaps with at least one air regulating hole, overlapping between at least one air passing hole and at least one air regulating hole adjust an air volume passing through the head of a spray gun.

2. The head of a spray gun of claim 1, wherein a pushing button is disposed on a side surface of the rotatable air volume regulating sleeve, for rotating the rotatable air volume regulating sleeve.

3. The head of a spray gun of claim 1, wherein the nozzle has an edge and a positioning wall with at least two stopping steps is extending forward from the edge of the nozzle; the sprayer has a periphery surface and at least one protrusion is disposed on the periphery surface, the sprayer rotates to convert a spray direction between transversal and vertical; the at least one protrusion is positioned between two corresponding stopping steps of the positioning wall so as to make the sprayer to be positioned relative to the nozzle.

4. The head of a spray gun of claim 1, wherein the sprayer has a pressure relief hole, the nozzle has at least one pressure relief air inlet, the at least one pressure relief air inlet and the pressure relief hole can be aligned with each other.

5. The head of a spray gun of claim 4, wherein there are multiple side air passing holes on the nozzle, the number of pressure relief air inlet is the same as the side air passing holes, and each side air passing hole and each pressure relief air inlet are interlaced arranged.

6. The head of a spray gun of claim 4, further comprising a spray-direction converting cover, wherein the sprayer nut has a front and the spray-direction converting cover is disposed at the front of the sprayer nut; a plurality of pair of bumps are protruding from an inner wall the spray-direction converting cover; each side air passing block of the sprayer is positioned between one pair of bumps on the spray-direction converting cover, so that the spray-direction converting cover can rotate the sprayer.

7. The head of a spray gun of claim 1, wherein a process hole is provided on the spray-direction converting cover.

8. The head of a spray gun of claim 1, wherein multiple anti-skid slots are provided on the periphery surface of the sprayer nut.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 is an exploded view of a head of a spray gun according to an embodiment of the present invention;

[0017] FIG. 2 is a perspective view of a nozzle of the head of a spray gun according to the embodiments of the present invention;

[0018] FIG. 3 is a perspective view of a sprayer of the head of a spray gun according to the embodiments of the present invention;

[0019] FIG. 4 is a sectional view of the head of a spray gun according to the embodiments of the present invention;

[0020] FIG. 5 is a perspective view of the head of a spray gun according to the embodiments of the present invention; and

[0021] FIG. 6 is another perspective view of the head of a spray gun according to the embodiments of the present invention, when it is mounted on a spray gun.

DETAILED DESCRIPTION OF THE INVENTION

[0022] To enable a further understanding of the present invention content of the invention herein, refer to the detailed description of the invention and the accompanying drawings below:

[0023] FIG. 1 to FIG. 5 show a head of a spray gun according to an embodiment the present invention. The head of a spray gun is mounted on a core 1 inside a spray gun body; the head of a spray gun comprises a nozzle 2 disposed at an end of the core 1, the nozzle having a front and a rear; a sprayer 3 covered at the front of the nozzle 2, the sprayer 3 is located at a front side in the axial direction of the nozzle 2 and this side is a side opposite to the core 1, the sprayer 3 having a front surface and a plurality of side air passing blocks 15 on the front surface of the sprayer 3. The nozzle has an edge and a positioning wall 9 with at least two stopping steps 91 is extending forward from the edge of the nozzle 2; a flat-cross reversal limiting bar 12 is provided on a side surface of the sprayer 3; the sprayer 3 has a periphery surface and at least one protrusion 12 is disposed on the periphery surface, the sprayer 3 rotates to convert a spray direction between transversal and vertical; the at least one protrusion 12 is positioned between two corresponding stopping steps 91 of the positioning wall 9 so as to make the sprayer 3 to be positioned relative to the nozzle 2. The sprayer 3 has a pressure relief hole 11, the nozzle 2 has at least one pressure relief air inlet 10, the at least one pressure relief air inlet 10 and the pressure relief hole 11 can be aligned with each other.

[0024] A rotatable air volume regulating sleeve 4 is disposed at the rear in the axial direction of the nozzle 2, i.e. at the same side as the core 1, the rotatable air volume regulating sleeve having a front; the rotatable air volume regulating sleeve 4 has a flange at the front of the rotatable air volume regulating sleeve 4, the flange has a front surface, the front surface of the flange abuts the nozzle 2, and the front surface of the flange has a plurality of air regulating holes 5 which are arranged in space in the circumferential direction. The nozzle 2 has a plurality of side air passing holes 6, when the rotatable air volume regulating sleeve 4 rotates, at least one side air passing hole overlaps with at least one air regulating hole 5, overlapping between at least one side air passing hole and at least one air regulating hole adjust an air volume passing through the head of a spray gun; each side air passing hole 6 and each pressure relief air inlet 10 are interlaced arranged. A pushing button 7 is disposed on a side surface of the rotatable air volume regulating sleeve 4, for rotating the rotatable air volume regulating sleeve 4, so that a relative angle between the air regulating holes 5 and the side air passing holes 6 on the nozzle 2 is adjusted, and the volume of air discharged from the side air passing holes 6 of the nozzle 2 is thus further adjusted. In this way, the volume of air discharged from the side air passing blocks 15 of the sprayer 3 is adjusted. The whole structure, including the nozzle 2, the sprayer 3 and the rotatable air volume regulating sleeve 4 mentioned above, is connected by a sprayer nut 14 arranged on their peripheries.

[0025] The head of the sprayer gun further comprises a spray-direction converting cover 8, wherein the sprayer nut 14 has a front and the spray-direction converting cover is disposed at the front of the sprayer nut 14; a plurality of pair of bumps are protruding from an inner wall the spray-direction converting cover 8; each side air passing block 15 of the sprayer 3 is positioned between one pair of bumps on the spray-direction converting cover 8, so that the spray-direction converting cover 8 can rotate the sprayer 3. A process hole 13 is provided on the spray-direction converting cover 8, while multiple anti-skid slots are provided on the periphery surface of the sprayer nut 14, and the at least one protrusion 12 is disposed on the sprayer 3, the sprayer 3 rotates to convert a spray direction between transversal and vertical. These structures bring convenience to the usage.

[0026] When in use, an operator adjusts the air regulating holes 5 on the rotatable air volume regulating sleeve 4 by stirring the pushing button 7, so that the volume of air discharged from the side air passing blocks 15 is adjusted, and the width in a horizontal, vertical, flat or square direction is thus regulated. All the operations can be performed directly with one hand during the spraying process and are thus very convenient.