Spray gun switch structure

Abstract

The utility model provides a spray gun switch structure. The spray gun comprises a spray gun body, a push rod and a pressing handle rotationally installed on the outer side wall of the spray gun body, a liquid outlet channel, a middle channel and a liquid inlet channel are arranged in the spray gun body and communicated in sequence, and the push rod penetrates through the side wall of the spray gun body; a valve sleeve, a valve plug and a spring are mounted in the middle channel; the elastic force of the spring is applied to the valve plug, and the end face of the valve plug abuts against the end face of the valve sleeve to block a passage between the liquid outlet channel and the liquid inlet channel. The end, located in the middle channel, of the push rod penetrates through the valve sleeve and abuts against the valve plug, and the push rod can be pushed to move towards one side of the valve plug by pressing the handle. And when the pushing force of pressing the handle is not applied, the end part of the valve plug is pushed by the elastic force of the spring to abut against the end part of the valve sleeve, at the moment, the liquid outlet channel and the liquid inlet channel are blocked, and the liquid cannot enter the liquid outlet channel.

Description

Technical Field

[0001] The utility model relates to a switch structure, in particular to a spray gun switch structure. Background Art

[0002] Common spray gun structures, such as the improved spray gun handle structure disclosed in the Taiwan New Model Specification Announcement with the certificate number TWM509687U, mainly include a pivoting part, a water outlet channel and a water inlet channel are arranged on the pivoting part, a pressing handle is installed on the outside of the water outlet channel, the pivoting part is hollow, and a push rod, a stop ring, a ball, a spring, etc. are installed inside the pivoting part. When the pressing handle is pushed to move to the side of the water inlet channel, the pressing handle pushes the push rod through the stop ring and drives the ball to move. At this time, the water outlet channel and the water inlet channel are interconnected, and water spraying can be realized; on the contrary, when the pressing handle is not pushed, the spring pushes the ball to resist the stop ring, and the water outlet channel is not interconnected with the water inlet channel.

[0003] Although the above-mentioned spray gun structure can realize the channel function of the water channel, the sealing form of the ball and the stop ring cooperating with each other is adopted inside. Since the effective contact area between the outer spherical surface of the ball and the stop ring is limited, the sealing effect needs to be further improved. Utility Model Content

[0004] In view of this, the utility model aims to provide a spray gun switch structure, which has a strong sealing effect.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A spray gun switch structure, comprising a spray gun body, a push rod, and a pressing handle rotatably mounted on the outer side wall of the spray gun body, wherein a liquid outlet channel, a middle channel, and a liquid inlet channel are arranged in the spray gun body, and the liquid outlet channel, the middle channel, and the liquid inlet channel are connected in sequence, and the push rod passes through the side wall of the spray gun body;

[0007] A valve sleeve, a valve plug and a spring are installed in the middle channel;

[0008] The spring force is applied to the valve plug, and the end surface of the valve plug abuts against the end surface of the valve sleeve to block the passage between the liquid outlet channel and the liquid inlet channel;

[0009] The end of the push rod located in the middle channel passes through the valve sleeve and abuts against the valve plug, and the pressing handle can push the push rod to move toward the valve plug.

[0010] Through the above technical scheme, when the pushing force of the pressing handle is not applied, the spring elastic force pushes the end of the valve plug to press against the end of the valve sleeve. At this time, the liquid outlet channel and the liquid inlet channel will be blocked, and the liquid cannot enter the liquid outlet channel; when the pushing force of the pressing handle is applied, the pressing handle pushes the push rod to move toward the side of the valve plug, and the push rod pushes the valve plug to move away from the valve sleeve. The end face of the valve plug is separated from the end face of the valve sleeve, and the liquid in the liquid inlet channel can enter the liquid outlet channel through the middle channel to achieve liquid discharge; the above switch structure is changed from the existing sealing form in which the ball and the stop ring cooperate with each other to the sealing form in which the end face of the valve plug and the end face of the valve sleeve are pressed against each other, which greatly increases the effective contact area between the valve plug and the valve sleeve, and the sealing effect is further improved; in addition, the valve sleeve and the middle channel adopt a split installation structure, and the valve sleeve can be processed separately, with higher end face processing accuracy and better sealing effect. The valve sleeve can also be replaced and repaired separately without replacing the entire spray gun body.

[0011] Preferably, the middle channel comprises a mounting hole, the valve sleeve is mounted in the mounting hole, a first mounting protrusion is provided on the outer sleeve wall of the valve sleeve, and the first mounting protrusion abuts against the orifice of the mounting hole.

[0012] Through the above technical solution, the valve sleeve is installed in the installation hole, and the first installation protrusion can be against the hole opening of the installation hole, which can effectively locate the relative position of the valve sleeve and the installation hole.

[0013] Preferably, the valve plug is provided with a plug hole, and the end of the push rod is inserted into the plug hole.

[0014] Through the above technical solution, the pushing stability of the push rod to push the socket is improved.

[0015] Preferably, a second mounting protrusion is provided on the outer rod wall of the push rod, and the second mounting protrusion abuts against the end surface of the valve sleeve.

[0016] Through the above technical solution, when the push rod pushes the valve plug to move, the second mounting protrusion can also abut against the end surface of the valve plug, further improving the stability of the push rod pushing the socket.

[0017] Preferably, a third mounting protrusion is provided on the outer side wall of the valve plug, the spring is sleeved on the outer side of the valve plug, and the end of the spring abuts against the third mounting protrusion.

[0018] Through the above technical solution, the spring can use the entire outer side wall of the valve plug for guiding, and the shrinkage and expansion direction of the spring is clearer.

[0019] Preferably, an abutment boss is provided on the end surface of the valve plug away from the push rod;

[0020] After the valve plug squeezes the spring, the abutment boss can abut against the channel side wall of the middle channel.

[0021] Through the above technical solution, the abutment boss can abut against the channel side wall of the middle channel, so as to control the compression degree of the spring, and the maximum spacing distance between the valve sleeve and the valve plug can also be controlled.

[0022] Preferably, the end surface of the valve plug is provided with a first sealing annular boss, and the end surface of the valve sleeve is provided with a second sealing annular boss, and the first sealing annular boss abuts against the second sealing annular boss to block the passage between the liquid outlet channel and the liquid inlet channel.

[0023] Through the above technical solution, the first sealing annular boss and the second sealing annular boss are provided, and the sealing accuracy between the valve sleeve and the valve plug can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a partial cross-sectional schematic diagram of an embodiment;

[0025] Figure 2 for Figure 1 Enlarged view of part A.

[0026] Figure numerals: 1. spray gun body; 2. liquid outlet channel; 3. middle channel; 4. liquid inlet channel; 5. push rod; 6. pressing handle; 7. valve sleeve; 8. valve plug; 9. socket; 10. spring; 11. mounting hole; 12. first mounting protrusion; 13. second mounting protrusion; 14. third mounting protrusion; 15. abutment boss; 16. first sealing annular boss; 17. second sealing annular boss. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 And attached Figure 2 , the specific implementation methods of the utility model are further described in detail to make the technical solution of the utility model easier to understand and grasp.

[0028] A spray gun switch structure comprises a spray gun body 1, wherein a liquid outlet channel 2, a middle channel 3 and a liquid inlet channel 4 are arranged in the spray gun body 1, wherein the liquid outlet channel 2, the middle channel 3 and the liquid inlet channel 4 are connected in sequence, and liquid can pass through the liquid outlet channel 2, the middle channel 3 and the liquid inlet channel 4 in sequence.

[0029] A pressing handle 6 is rotatably connected to the outer side wall of the spray gun body 1 .

[0030] A push rod 5 is provided through the side wall of the spray gun body 1 . The end of the push rod 5 located outside the spray gun body 1 abuts against the pressing handle 6 , and the other end of the push rod 5 extends into the middle channel 3 .

[0031] The middle passage 3 is provided with a valve sleeve 7, a valve plug 8 and a spring 10. The valve sleeve 7, the valve plug 8 and the spring 10 are arranged in sequence along a side away from the pressing handle 6.

[0032] The middle passage 3 comprises a mounting hole 11, and the valve sleeve 7 is tightly fitted in the mounting hole 11. A first mounting protrusion 12 is provided on the outer wall of the valve sleeve 7, and the first mounting protrusion 12 is preferably an annular protrusion, and the first mounting protrusion 12 abuts against the orifice of the mounting hole 11.

[0033] The valve plug 8 is provided with an insertion hole 9, and the push rod 5 passes through the valve sleeve 7 and is inserted into the insertion hole 9. The outer rod wall of the push rod 5 is provided with a second mounting protrusion 13, which is preferably also an annular protrusion, and the second mounting protrusion 13 abuts against the end surface of the valve sleeve 7.

[0034] The outer wall of the valve plug 8 is provided with a third mounting protrusion 14 , which is preferably also an annular protrusion. The spring 10 is sleeved on the outer side of the valve plug 8 , and the end of the spring 10 abuts against the third mounting protrusion 14 .

[0035] The end surface of the valve plug 8 away from the push rod 5 is provided with an abutment boss 15 ; after the valve plug 8 squeezes the spring 10 , the abutment boss 15 can abut against the channel side wall of the middle channel 3 .

[0036] The end surface of the valve plug 8 is provided with a first sealing annular boss 16 , and the end surface of the valve sleeve 7 is provided with a second sealing annular boss 17 . The first sealing annular boss 16 abuts against the second sealing annular boss 17 to block the passage between the liquid outlet channel 2 and the liquid inlet channel 4 .

[0037] In actual use:

[0038] (1) When the push force of the pressing handle 6 is not applied, the elastic force of the spring 10 pushes the valve plug 8 to move toward the valve sleeve 7, and the first sealing annular boss 16 abuts against the second sealing annular boss 17. At this time, the liquid outlet channel 2 and the liquid inlet channel 4 are blocked, and the liquid cannot enter the liquid outlet channel 2, thereby achieving the purpose of blocking the passage between the liquid outlet channel 2 and the liquid inlet channel 4;

[0039] (2) When the push handle 6 is applied with a thrust, the push handle 6 pushes the push rod 5 to move toward the valve plug 8, and the push rod 5 pushes the valve plug 8 to move away from the valve sleeve 7. The first sealing annular boss 16 and the second sealing annular boss 17 are separated, and the liquid in the liquid inlet channel 4 can enter the liquid outlet channel 2 through the middle channel 3, thereby achieving liquid discharge.

[0040] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A spray gun switch structure, comprising a spray gun body (1), a push rod (5), and a pressing handle (6) rotatably mounted on the outer wall of the spray gun body (1), wherein the spray gun body (1) is provided with a liquid outlet channel (2), a middle channel (3), and a liquid inlet channel (4), wherein the liquid outlet channel (2), the middle channel (3), and the liquid inlet channel (4) are sequentially connected, and the push rod (5) passes through the side wall of the spray gun body (1), wherein: A valve sleeve (7), a valve plug (8) and a spring (10) are installed in the middle channel (3); The elastic force of the spring (10) is applied to the valve plug (8), and the end surface of the valve plug (8) abuts against the end surface of the valve sleeve (7) to block the passage between the liquid outlet channel (2) and the liquid inlet channel (4); The end of the push rod (5) located in the middle channel (3) passes through the valve sleeve (7) and abuts against the valve plug (8), and the pressing handle (6) can push the push rod (5) to move toward the side of the valve plug (8).

2. A spray gun switch structure according to claim 1, characterized in that: The middle channel (3) comprises a mounting hole (11), the valve sleeve (7) is mounted in the mounting hole (11), a first mounting protrusion (12) is provided on the outer wall of the valve sleeve (7), and the first mounting protrusion (12) abuts against the orifice of the mounting hole (11).

3. A spray gun switch structure according to claim 1, characterized in that: The valve plug (8) is provided with an insertion hole (9), and the end of the push rod (5) is inserted into the insertion hole (9).

4. A spray gun switch structure according to claim 3, characterized in that: A second mounting protrusion (13) is provided on the outer rod wall of the push rod (5), and the second mounting protrusion (13) abuts against the end surface of the valve sleeve (7).

5. A spray gun switch structure according to any one of claims 1 to 4, characterized in that: A third mounting protrusion (14) is provided on the outer wall of the valve plug (8), the spring (10) is sleeved on the outer side of the valve plug (8), and the end of the spring (10) abuts against the third mounting protrusion (14).

6. A spray gun switch structure according to claim 5, characterized in that: The end surface of the valve plug (8) away from the push rod (5) is provided with a contact boss (15); After the valve plug (8) squeezes the spring (10), the abutment boss (15) can abut against the channel side wall of the middle channel (3).

7. The spray gun switch structure according to claim 1, characterized in that: The end surface of the valve plug (8) is provided with a first sealing annular boss (16), and the end surface of the valve sleeve (7) is provided with a second sealing annular boss (17), and the first sealing annular boss (16) and the second sealing annular boss (17) abut against each other to block the passage between the liquid outlet channel (2) and the liquid inlet channel (4).

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