Spray gun head

Abstract

The invention discloses a spray gun head, comprising a gun body, an air compression component, a suction channel and a liquid spray channel are arranged on the gun body, the air compression component comprises a pressure chamber and a piston arranged in the pressure chamber, the suction channel is communicated with the pressure chamber and the liquid spray channel respectively, a head cap is installed on the gun body, and a diversion structure is arranged between the gun body and the head cap; a first opening and closing structure is arranged in the liquid spray channel, the first opening and closing structure comprises a first body, a first opening and closing body and a first elastic member, and a gap is left between the first opening and closing body and the inner wall of the liquid spray channel; a second opening and closing structure is arranged in the suction channel, the second opening and closing structure comprises a second opening and closing body and an elastic sealing member connected thereto, a liquid channel with a liquid through hole is arranged on the second opening and closing body, and a liquid through cavity communicated with the air inlet and liquid inlet holes is formed between the elastic sealing member and the second opening and closing body. The first elastic member is arranged, and the first opening and closing port can be opened only by applying a sufficiently large pressure, and the elastic sealing member can be quickly reset without external force after being pushed open by the liquid.

Description

Technical Field

[0001] The invention relates to the technical field of liquid pressure pumps, and in particular to a spray gun head. Background Art

[0002] Liquid pressure pumps are widely used in daily life. For example, bottled liquid products such as kitchen oil cleaning liquid, shampoo, cosmetics, perfume, insect repellent, etc. all use liquid pressure pump technology. Compared with the traditional bottle opening method, liquid pressure pump technology is more convenient, efficient, and has a larger output. The spray gun head is a common liquid pressure pump tool that needs to be used with a liquid container. It generally has a trigger, cavity, piston rod, and nozzle. Its working principle is to use the internal pressure of the piston to increase the internal pressure of the liquid container by compressing the space, thereby spraying liquid from the nozzle.

[0003] Existing spray gun heads generally have an elastic sealing bowl on the liquid channel. Due to the different grip strengths when pressing the trigger, the liquid flow rate passing through the elastic sealing bowl is inconsistent, resulting in uneven liquid spraying volume. Summary of the invention

[0004] In view of the above analysis, the spray gun head proposed in the present invention is designed to solve the deficiencies of the prior art.

[0005] The present invention is mainly achieved through the following technical solutions:

[0006] The spray gun head provided by the present invention comprises a gun body, on which an air compression component, a suction channel and a liquid spray channel are provided, the air compression component comprises a pressure chamber and a piston, the pressure chamber is provided with air and liquid inlet holes connected to the suction channel, the piston and the pressure chamber are slidingly sealed, the suction channel is connected to the liquid spray channel, one end of the suction channel is provided with a liquid inlet hole connected to a liquid storage bottle, the other end of the liquid spray channel is provided with a liquid outlet hole, a head cap is installed on the gun body, a diversion structure for converting liquid into spray is provided between the gun body and the head cap, the head cap is provided with a spray hole movably connected to the diversion structure, and the diversion structure is connected to the liquid outlet hole.

[0007] A first opening and closing structure for opening or closing the spray channel is provided in the spray channel, the first opening and closing structure includes a first opening and closing body and a first elastic member connected to each other, a limiting structure with a first opening and closing opening is provided in the spray channel, the first elastic member is slidably arranged on the spray channel, the first opening and closing body can telescopically open the first opening and closing opening or be sealed with the first opening and closing opening, and a gap is left between the first opening and closing body and the inner wall of the spray channel.

[0008] A second opening and closing structure for opening or closing the suction channel is provided in the suction channel, the second opening and closing structure includes a second opening and closing body and an elastic sealing member connected to each other, the second opening and closing body and the elastic sealing member are both located below the air inlet and liquid inlet holes, the second opening and closing body is sealed in the suction channel, the second opening and closing body is provided with a liquid channel connected to the liquid storage bottle, the liquid channel is provided with a liquid through hole, the elastic sealing member is elastically sealed with the inner wall of the suction channel, and a liquid through cavity connected to the liquid through hole is formed between the elastic sealing member, the second opening and closing body and the inner wall of the suction channel.

[0009] Furthermore, a pressing handle is hinged on the gun body, and a sliding structure is provided between the pressing handle and the piston.

[0010] Preferably, the sliding structure is a sliding hole and a limiting shaft that are slidably connected in cooperation with each other, or a sliding groove and a limiting protrusion that are slidably arranged in cooperation with each other.

[0011] Furthermore, a guide plate is provided on the gun body, and a second elastic member is provided between the pressing handle and the guide plate. The second elastic member includes a first elastic portion, and a first clamping portion is provided at one end of the first elastic portion. The first clamping portion is clamped with the pressing handle, and the other end of the first elastic portion cooperates with the guide plate to slide against it.

[0012] Preferably, the first elastic portion is provided with an abutment portion that cooperates with and abuts against the guide plate.

[0013] Preferably, the guide plate is tilted or is an arc-shaped guide plate.

[0014] Furthermore, the first elastic part and the guide plate are arranged on two sides of the gun body opposite to each other, and one end of the two first elastic parts is respectively connected to two sides of the first clamping part.

[0015] Furthermore, the piston comprises a connecting rod and a piston body which are connected to each other, the connecting rod is connected to the pressing handle via a sliding structure, and the piston body is provided with an outer skirt which is sealed with the inner wall of the pressure chamber.

[0016] Preferably, a guide sleeve is provided on the pressure chamber, and the guide sleeve is slidably connected to the connecting rod.

[0017] Furthermore, the head cap is rotatably connected to the gun body, and the diversion structure includes a diversion plate and a diversion fluid. The diversion plate is sealingly connected to the gun body, and the diversion fluid is installed on the diversion plate. A liquid inlet cavity is provided between the outer wall of the diversion fluid and the inner wall of the head cap or the gun body. A collecting groove is provided on the diversion plate, and the collecting groove connects the liquid outlet and the liquid inlet cavity. A plurality of first diversion grooves are provided at intervals on the outer wall of the diversion fluid, and a plurality of spray channels connected to the liquid inlet cavity are provided on the inner wall of the head cap. A plurality of guide blocks distributed at intervals are provided in the head cap, and a guide groove is formed between two adjacent guide blocks, and the first diversion groove is connected to the spray channel, and the guide groove connects the spray channel and the spray hole.

[0018] Preferably, a plurality of diversion holes are provided on the inner wall of the collecting trough, and the diversion holes penetrate the diversion plate to connect the collecting trough with the liquid inlet cavity.

[0019] Preferably, a spray cover body is also provided on the gun body, and the head cap is movably connected to the spray cover body.

[0020] Furthermore, a rotating sleeve connecting the spray channel and the diverter disk is provided on the gun body, a sealing sleeve is provided in the head cap, the head cap and the rotating sleeve are rotatably sealed, the rotating sleeve is arranged on the sealing sleeve, the diverter disk is sealed and connected to the rotating sleeve, a liquid inlet cavity is formed between the diverter body and the inner wall of the rotating sleeve or the sealing sleeve, the diverter body is inserted into the sealing sleeve and abuts against the guide block of the head cap, the spray channel is arranged on the inner side wall of the sealing sleeve, and the guide block is located in the sealing sleeve.

[0021] Preferably, a positioning piece is provided between the diverter plate and the rotating sleeve.

[0022] Furthermore, the first opening and closing structure also includes a diverter head slidably arranged on the liquid outlet and abutting against the diverter structure, the diverter head is connected to the first elastic member, and a plurality of diverter channels connecting the liquid spray channel and the diverter structure are arranged at intervals on the outer wall of the diverter head.

[0023] Preferably, the first elastic member comprises a plurality of connected arc-shaped curved portions, which are generally wavy in shape, and the side walls of two adjacent arc-shaped curved portions are provided with corresponding limiting blocks which can be closely attached to each other.

[0024] Furthermore, the elastic sealing member is a bowl-shaped structure with a larger upper end and a smaller lower end, and the lower end of the elastic sealing member is clamped in the liquid channel.

[0025] Preferably, the wall thickness of the elastic sealing member gradually becomes thinner from bottom to top.

[0026] Furthermore, the pressure chamber is arranged horizontally or inclined;

[0027] Preferably, a mounting seat is provided at one end of the second opening and closing body close to the liquid inlet hole, an air return port is provided on the mounting seat, and a connecting piece movably connected to the liquid storage bottle is installed on the mounting seat.

[0028] Preferably, the first opening and closing structure and the second opening and closing structure are both made of plastic.

[0029] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows:

[0030] The spray gun head provided by the present invention forms a pressure space between the first and second opening and closing bodies by arranging a first opening and closing body in a liquid spraying channel and arranging a second opening and closing body in a suction channel, thereby realizing double sealing and improving the sealing performance of the spray gun head. Under the action of the piston, only one of the first and second opening and closing bodies is opened and the other is closed to avoid leakage. Due to the arrangement of the first elastic member, the spray pressure of the liquid is increased to avoid the problem of uneven liquid spraying amount due to different pressing forces. The first opening and closing structure is arranged in the liquid spraying channel in a transverse direction to shorten the liquid spraying path to ensure the spraying pressure and liquid spraying amount. One end of the second elastic member is connected to the pressing handle, and the other end of the second elastic member is slidably connected to the guide plate. Under the action of the pressing handle, the right end of the second elastic member first slides backward along the guide plate, and then moves downward and bends to generate deformation, so as to smoothly transmit the driving force of the pressing handle to the connecting rod, and utilizes the rebound force of the lever to form a rebound driving force, so as to achieve rapid resetting, and the deformation amount is small, thereby extending the use time. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 is a stereoscopic diagram of a spray gun head provided by an embodiment of the present invention;

[0033] Figure 2 is a stereoscopic diagram of a spray gun head provided by an embodiment of the present invention with a spray cover body removed;

[0034] Figure 3 is an exploded schematic diagram of a spray gun head provided by an embodiment of the present invention;

[0035] Figure 4 is a cross-sectional schematic diagram of a spray gun head provided by an embodiment of the present invention when the head cap is rotated to open the spray hole (I);

[0036] Figure 5is a cross-sectional schematic diagram of the spray gun head provided by an embodiment of the present invention when the head cap is rotated to open the spray hole (II);

[0037] Figure 6 yes Figure 4 A magnified view of part A;

[0038] Figure 7 is a three-dimensional diagram of a head cap and a diversion structure provided by an embodiment of the present invention (I);

[0039] Figure 8 is a three-dimensional diagram of a head cap and a diversion structure provided by an embodiment of the present invention (II);

[0040] Fig. 9 is a three-dimensional diagram of a first opening and closing structure provided by an embodiment of the present invention;

[0041] Fig.10 is a three-dimensional diagram of a second elastic member provided by an embodiment of the present invention;

[0042] Fig.11 is a three-dimensional diagram of an elastic sealing member provided by an embodiment of the present invention;

[0043] Fig.12 It is an exploded schematic diagram of the piston, guide sleeve and pressing handle provided in an embodiment of the present invention.

[0044] The reference numerals are as follows:

[0045] 1. Gun body, 2. Air compression assembly, 21. Pressure chamber, 21a. Air and liquid inlet holes, 211. Guide sleeve, 22. Piston, 22a. Connecting rod, 22b. Piston body, 22c. Outer skirt, 3. Suction channel, 4. Liquid spray channel, 4a. Liquid outlet hole, 41. Limiting structure, 41a. First opening and closing port, 5. Head cap, 5a. Spray hole, 5b. Spray channel, 51. Guide block, 51a. Guide groove, 52. Sealing sleeve, 6. Diverter structure, 61. Diverter plate, 61a. Collecting groove, 61b. Diverter hole, 61d. Limiting plane, 62. Diverter body, 62a. First diverter groove, 63. Liquid inlet chamber, 7. First opening and closing structure, 71. First Opening and closing body, 72, first elastic member, 72a, arc-shaped bending portion, 72b, limiting block, 73, diverter head, 73a, diverter channel, 74, column, 8, second opening and closing structure, 81, second opening and closing body, 81a, liquid channel, 81b, liquid hole, 82, elastic sealing member, 83, liquid cavity, 9, spray cover body, 10, pressing handle, 11, sliding structure, 11a, slide groove, 11b, limiting protrusion, 12, guide plate, 13, second elastic member, 13a, first elastic portion, 13b, first clamping portion, 13c, abutting portion, 14, rotating sleeve, 15, positioning member, 16, mounting seat, 16a, air return port, 17, connecting member, 18, liquid inlet pipe. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the present invention, and thus to more clearly define the scope of the present invention, the present invention is described in detail with respect to some specific embodiments of the present invention. It should be noted that the following are only some specific implementation methods of the present invention, which are only part of the embodiments of the present invention, wherein the specific and direct description of the relevant structure is only for the convenience of understanding the present invention, and each specific feature does not naturally and directly limit the scope of implementation of the present invention. The conventional selection and replacement made by those skilled in the art under the guidance of the present invention should be regarded as within the scope of the present invention.

[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0048] Example 1

[0049] like Figure 1-5 As shown in Figures 9 and 10, the present invention provides a spray gun head, including a gun body 1, on which an air compression assembly 2, a suction channel 3 and a liquid spray channel 4 are provided. The air compression assembly 2 includes a pressure chamber 21 and a piston 22. The pressure chamber 21 is provided with an air and liquid inlet hole 21a connected to the suction channel 3. The piston 22 and the pressure chamber 21 are in sliding and sealing cooperation. The suction channel 3 is connected to the liquid spray channel 4. One end of the suction channel 3 is provided with a liquid inlet hole connected to a liquid storage bottle, and the other end of the liquid spray channel 4 is provided with a liquid outlet hole 4a. A head cap 5 is installed on the gun body 1. A diversion structure 6 for converting liquid into spray is provided between the gun body 1 and the head cap 5. A spray hole 5a movably connected to the diversion structure 6 is provided on the head cap 5, and the diversion structure 6 is connected to the liquid outlet hole 4a. Among them, the pressure chamber 21 is arranged on the gun body 1. A liquid outlet is provided at the connection between the suction channel 3 and the liquid spray channel 4.

[0050] A first opening and closing structure 7 for opening or closing the spray channel 4 is provided in the spray channel 4. The first opening and closing structure 7 includes a first opening and closing body 71 and a first elastic member 72 connected to each other. A limiting structure 41 with a first opening and closing port 41a is provided in the spray channel 4. The first elastic member 72 is slidably arranged on the spray channel 4. The first opening and closing body 71 can telescopically open the first opening and closing port 41a or be sealed with the first opening and closing port 41a, and a gap is left between the first opening and closing body 71 and the inner wall of the spray channel 4.

[0051] A second opening and closing structure 8 for opening or closing the suction channel 3 is provided in the suction channel 3. The second opening and closing structure 8 includes a second opening and closing body 81 and an elastic seal 82 connected to each other. The second opening and closing body 81 and the elastic seal 82 are both located below the air and liquid inlet holes 21a. The second opening and closing body 81 is sealed in the suction channel 3. The second opening and closing body 81 is provided with a liquid channel 81a connected to the liquid storage bottle. The liquid channel 81a is provided with a liquid through hole 81b. The elastic seal 82 is elastically sealed with the inner wall of the suction channel 3. A liquid through cavity 83 connected to the liquid through hole 81b is formed between the elastic seal 82, the second opening and closing body 81 and the inner wall of the suction channel 3. Among them, the first opening and closing structure 7 and the second opening and closing structure 8 are both made of plastic, which is convenient for recycling and reuse, and is not easy to react with liquid.

[0052] like Fig. 9 As shown, specifically, the first opening and closing structure 7 further includes a diverter head 73 slidably disposed on the liquid outlet 4a and abutting against the diverter structure 6, the diverter head 73 is connected to the first elastic member 72, and a plurality of diverter channels 73a connecting the liquid injection channel 4 and the diverter structure 6 are arranged on the outer wall of the diverter head 73. The stability of the first opening and closing structure 7 is improved, and the first opening and closing body 71 slides smoothly along the liquid injection channel 4.

[0053] Preferably, the first elastic member 72 includes a plurality of connected arc-shaped curved portions 72a, which are generally wavy in shape, have a faster reset speed, and are not easily broken. The side walls of two adjacent arc-shaped curved portions 72a are correspondingly provided with stop blocks 72b that can be closely attached to each other. When the first opening and closing body 71 is compressed, the first elastic member 72 is driven to be compressed, so that the stop blocks 72b are closely attached to each other, so as to limit the compression spacing of the first elastic member 72 and prevent the first elastic member 72 from being fatigued due to excessive deformation.

[0054] Preferably, the limiting structure 41 is an annular groove arranged on the inner wall of the liquid injection channel 4, and the first opening and closing body 71 is an opening and closing disk, which is fitted on the annular groove to close the hole on the annular groove. The front end of the diverter head 73 is provided with a disk body, and the rear end of the diverter head 73 is plate-shaped. The upper and lower surfaces of the plate body of the diverter head 73 are respectively provided with separation ribs to form a plurality of spaced diverter channels 73a between the plate body.

[0055] Furthermore, a column 74 is provided on the first opening and closing body 71 and passes through the first opening and closing opening 41a, which plays a positioning and guiding role for the first opening and closing body 71, so that the movement of the first opening and closing body 71 is more stable.

[0056] like Fig.11 As shown, specifically, the elastic seal 82 is a bowl-shaped structure with a large upper end and a small lower end, and the lower end of the elastic seal 82 is clamped in the liquid channel 81a. The elastic seal 82 will not move up and down along the suction channel 3, and the reset speed is fast, so that the liquid output is more stable, the liquid is not easy to flow back from the elastic seal 82, and the sealing performance is better.

[0057] Preferably, the wall thickness of the elastic sealing member 82 gradually decreases from bottom to top, so that the elastic sealing member 82 can be opened easily and quickly reset to seal the suction channel 3 .

[0058] Preferably, the lower end of the elastic sealing member 82 passes through the second opening and closing body 81 and is disposed in the liquid passage 81 a.

[0059] Furthermore, the upper end of the elastic seal 82 is interference fit with the inner wall of the liquid channel 81a.

[0060] Preferably, the second opening and closing body 81 is thin at the upper end and thick at the lower end, with a conical transition in the middle.

[0061] Furthermore, three liquid through holes 81 b are provided at intervals along the circumference of the second opening and closing body 81 .

[0062] Specifically, there are gaps between the second opening and closing body 81 and the elastic sealing member 82 and the inner wall of the suction channel 3 , respectively, which are connected to the liquid through hole 81 b .

[0063] like Figure 6-8 As shown, preferably, the head cap 5 is rotatably connected to the gun body 1, and the diverter structure 6 includes a diverter plate 61 and a diverter fluid 62. The diverter plate 61 is sealed and connected to the gun body 1, and the diverter fluid 62 is installed on the diverter plate 61. A liquid inlet chamber 63 is provided between the outer wall of the diverter fluid 62 and the inner wall of the head cap 5 or the gun body 1. A collecting groove 61a is provided on the diverter plate 61, and the collecting groove 61a connects the liquid outlet 4a and the liquid inlet chamber 63. A plurality of first diverter grooves 62a are provided at intervals on the outer wall of the diverter fluid 62, and a plurality of spray channels 5b connected to the liquid inlet chamber 63 are provided on the inner wall of the head cap 5. A plurality of guide blocks 51 distributed at intervals are provided in the head cap 5, and a guide groove 51a is formed between two adjacent guide blocks 51. The first diverter groove 62a is connected to the spray channel 5b, and the guide groove 51a connects the spray channel 5b with the spray hole 5a.

[0064] By rotating the head cap 5, the first diverter groove 62a is connected to the spray channel 5b, which serves the purpose of switching. The water in the spray channel 4 enters the liquid inlet chamber 63 through the collecting groove 61a, and then is dispersed from the spray channel 5b and the first diverter groove 62a to several guide grooves 51a in turn. By setting guide grooves 51a of different shapes, the shape and size of the liquid sprayed from the spray hole 5a are different.

[0065] Specifically, there is one spray hole 5a. The spray channel 5b is a through groove spaced apart along the circumferential direction, and there are six of them. Three first diverter grooves 62a are provided along the circumferential direction. By rotating the head cap 5, the head cap 5 is opened or closed with the diverter structure 6 of the gun body 1 in different directions, and the switch operation can be realized in different directions.

[0066] Preferably, the guide groove 51a is at least one of a linear groove and a bending groove. A plurality of bending grooves are arranged along the circumference of the inner wall of the head cap 5 to form a spiral liquid flow channel to achieve a mist spray effect, and a plurality of linear grooves are arranged along the circumference of the inner wall of the head cap 5 to achieve a linear mist spray effect. The linear groove and the bending groove are arranged at intervals to achieve linear mist and mist spray effects in different directions, increase the spray diversity, and optimize the user experience.

[0067] Preferably, a plurality of diverter holes 61b are provided on the inner wall of the collecting groove 61a, and the diverter holes 61b penetrate the diverter plate 61 to connect the collecting groove 61a with the liquid inlet cavity 63. The liquid is diverted for the first time through the diverter holes 61b, then concentrated in the liquid inlet cavity 63, and then diverted for the second time through the first diverter groove 62a, and finally converged and sprayed out through the spray hole 5a.

[0068] Specifically, the gun body 1 is provided with a rotating sleeve 14 connecting the liquid spray channel 4 and the diverter disc 61, and a sealing sleeve 52 is provided in the head cap 5. The head cap 5 and the rotating sleeve 14 are rotatably sealed, the rotating sleeve 14 is sleeved on the sealing sleeve 52, the diverter disc 61 and the rotating sleeve 14 are sealed, and a liquid inlet cavity 63 is formed between the diverter fluid 62 and the inner wall of the rotating sleeve 14 or the sealing sleeve 52. The diverter fluid 62 is inserted into the sealing sleeve 52 and abuts against the guide block 51 of the head cap 5. The spray channel 5b is arranged on the inner side wall of the sealing sleeve 52, and the guide block 51 is located in the sealing sleeve 52. The head cap 5 is rotatably connected with the rotating sleeve 14, so that the head cap 5 is connected or closed with the diverter fluid 62, and the switch function is realized.

[0069] Preferably, a positioning member 15 is provided between the diverter plate 61 and the rotating sleeve 14 to position the diverter plate 61 .

[0070] Furthermore, the positioning member 15 includes a groove and a protrusion that are matched and connected, the outer wall of the diverter plate 61 is provided with a groove, and the inner wall of the rotating sleeve 14 is provided with a protrusion.

[0071] Preferably, the diverter plate 61 is also provided with a limiting plane 61d, and a positioning block opposite to the protrusion is provided on the inner side wall of the rotating sleeve 14, and the limiting plane 61d cooperates with the positioning block to abut against the positioning block. The groove and the limiting plane 61d are respectively positioned with the rotating sleeve 14 to improve the stability of the connection between the diverter plate 61 and the rotating sleeve 14, so that the diverter plate 61 is not easy to rotate.

[0072] Preferably, a limiting ring is provided on the outer wall of the rotating sleeve 14, and an annular limiting groove is provided on the inner wall of the head cap 5, and the limiting ring rotates in the limiting groove.

[0073] Preferably, the gun body 1 is further provided with a spray cover 9, and the head cap 5 is movably connected to the spray cover 9. The head cap 5 and the spray cover 9 cooperate to rotate against each other.

[0074] like Fig.12As shown, preferably, a pressing handle 10 is hinged on the gun body 1 , and a sliding structure 11 is provided between the pressing handle 10 and the piston 22 .

[0075] When the pressing handle 10 presses the piston 22, there is an inclined force, which makes the force uneven, causing the piston to tilt relative to the pressure chamber 21, which may cause leakage of liquid or air in the pressure chamber 21. The piston 22 is slidably connected to the pressing handle 10, so that the center point of the piston 22 can slide freely under the action of the pressing force, so that the piston 22 and the pressure chamber 21 are always kept in a sealed state, which can avoid leakage and make the movement of the piston 22 more stable, thereby increasing the service life.

[0076] Preferably, the sliding structure 11 is a sliding hole and a limiting shaft that are slidably connected in cooperation, or a sliding groove 11a and a limiting protrusion 11b that are slidably arranged in cooperation.

[0077] Preferably, slide grooves 11 a are provided on both sides of the piston 22 , and a slot for the piston rod 22 a to be inserted is provided in the pressing handle 10 , and limiting protrusions 11 b are provided in the slot to maintain a relative spacing.

[0078] like Fig.12 As shown, specifically, the piston 22 includes a connecting rod 22a and a piston body 22b connected to each other. The connecting rod 22a is connected to the pressing handle 10 through a sliding structure 11, and the piston body 22b is provided with an outer skirt 22c sealed with the inner wall of the pressure chamber 21.

[0079] Preferably, a guide sleeve 211 is provided on the pressure chamber 21, and the guide sleeve 211 is slidably connected to the connecting rod 22a. By providing the guide sleeve 211, the connecting rod 22a moves more stably, and the piston body 22b is not easy to produce unilateral wear with the pressure chamber 21.

[0080] Preferably, the middle of the outer skirt 22c is concave, and the two ends are upwardly tilted to seal with the inner wall of the pressure chamber 21. One end of the outer skirt 22c is sealed with the guide sleeve 211 through a conical surface, which can effectively prevent leakage.

[0081] Furthermore, the guide sleeve 211 is sleeved on the connecting rod 22 a and is partially accommodated in the pressure chamber 21 .

[0082] Specifically, the pressure chamber 21 is arranged horizontally or inclined. When the pressure chamber 21 is inclined, it is inclined upward toward the air and liquid inlet holes 21a.

[0083] Furthermore, the pressure chamber 21 is located below the liquid spraying channel 4 for easy operation.

[0084] like Fig.10As shown, preferably, a guide plate 12 is provided on the gun body 1, and a second elastic member 13 is provided between the pressing handle 10 and the guide plate 12, the second elastic member 13 includes a first elastic portion 13a, one end of the first elastic portion 13a is provided with a first clamping portion 13b, the first clamping portion 13b is clamped with the pressing handle 10, and the other end of the first elastic portion 13a cooperates with the guide plate 12 to slide against.

[0085] Preferably, the guide plate 12 is tilted or is an arc-shaped guide plate, wherein the guide plate 12 is tilted upward toward the second elastic member 13, and the inclination angle of the guide plate 12 to the horizontal direction is 15-30 degrees.

[0086] One end of the second elastic member 13 is connected to the pressing handle 10, and the other end of the second elastic member 13 is slidably connected to the guide plate 12. Under the action of the pressing handle 10, the second elastic member 13 first slides backward along the guide plate 12, and then moves downward to bend and deform, and no lateral displacement occurs during the movement, and the driving force of the pressing handle 10 is smoothly transmitted to the connecting rod 22a. When the pressing handle 10 stops applying force, the rebound force of the lever principle is used to form a rebound driving force, which can achieve rapid reset, improve the comfort of pressing, and the deformation is small, which prolongs the use time. The second elastic member 13 is located outside the pressure chamber 21. Compared with being set inside the pressure chamber 21, it has a longer use time and reduces costs.

[0087] Preferably, the first elastic portion 13a is provided with an abutting portion 13c that cooperates with the guide plate 12 to abut against the guide plate 12, so as to prevent the free end of the first elastic portion 13a from contacting the pressure chamber 21 during the downward movement.

[0088] Specifically, the first elastic part 13a and the guide plate 12 are arranged on both sides of the gun body 1, and one end of the two first elastic parts 13a is connected to both sides of the first clamping part 13b respectively, forming a double lever structure, which is not easy to break due to deformation, and has better toughness and elasticity.

[0089] Preferably, the first clamping portion 13b is located between the hinge point between the pressing handle 10 and the gun body 1 and the connection point between the pressing handle 10 and the connecting rod 22a, so as to shorten the deformation degree of the first elastic portion 11a under pressure and prolong the service life of the second elastic member 13.

[0090] Furthermore, the pressing handle 10 is provided with a slot engaged with the first engaging portion 13 b.

[0091] Preferably, the guide plate 12 and the second elastic member 13 are both located above the pressure chamber 21. A gap is left between the movable end of the first elastic portion 13a and the outer wall of the pressure chamber 21. The first elastic portion 13a is driven by the piston 22 to slide along the guide plate 12 and does not contact the pressure chamber 21.

[0092] Furthermore, the first elastic part 13a is curved and provided with an arc-shaped waist hole, which makes it easier to bend. The curvature of the first elastic part 13a in a naturally stretched state is R15mm-R20mm.

[0093] Preferably, a mounting seat 16 is provided at one end of the second opening and closing body 81 near the liquid inlet, and a return air port 16a is provided on the mounting seat 16. A connecting piece 17 movably connected to the liquid storage bottle is installed on the mounting seat 16. The return air port 16a is connected to the pressure chamber 21 to avoid the situation where the air pressure inside and outside the liquid storage bottle is inconsistent.

[0094] Preferably, a liquid inlet pipe 18 is provided on the mounting seat 16 and passes through the connecting piece 17 .

[0095] Furthermore, the liquid storage bottle is threadedly connected to the connecting piece 17. A sealing gasket is provided between the liquid storage bottle and the connecting piece 17.

[0096] Preferably, a receiving groove communicating with the liquid inlet hole is provided at the lower end of the gun body 1, and a limiting ring is provided around the mounting seat 16, and the limiting ring abuts against the receiving groove.

[0097] The spray gun head is made of all plastic, which is beneficial to environmental protection and convenient for recycling.

[0098] The spray gun head provided by the present invention has the following working principle: the first opening and closing body 71 is elastically sealed to the first opening and closing port 41a by the first elastic member 72 to close the liquid spraying channel 4, and the elastic sealing member 82 elastically seals the suction channel 3 due to interference fit. When in use, the piston 22 slides along the pressure chamber 21 to compress the air, and the air enters the liquid spraying channel 4 through the pressure chamber 21 and the suction channel 3 in turn to support the first opening and closing body 71. Under the elastic force of the first elastic member 72, a sufficiently large driving force needs to be applied to the piston 22 to make the first opening and closing body 71 leave the first opening and closing port 41a, so that the air flows along the gap. It is discharged from the head cap 5 through the diversion structure 6, and the elastic seal 82 remains in a sealed state at this time; then when the piston is pulled out, the first opening and closing body 71 remains in a sealed state, and the liquid squeezes the outer wall of the elastic seal 82 to produce a gap. After the liquid in the liquid storage bottle is sucked into the pressure chamber 21 and the suction channel 3, the elastic seal 82 can be quickly reset in the absence of external force. Finally, the piston 22 is pressed, and the elastic seal 82 remains in a sealed state, so that the liquid in the pressure chamber 21 and the suction channel 3 squeezes the first opening and closing body 71 to open the first opening and closing port 41a again, and is diverted by the diversion structure 6 and finally sprayed out from the spray hole 5a in atomized form.

[0099] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A spray gun head, characterized in that: The invention comprises a gun body (1), wherein the gun body (1) is provided with an air compression component (2), a suction channel (3) and a liquid spray channel (4), wherein the air compression component (2) comprises a pressure chamber (21) and a piston (22), wherein the pressure chamber (21) is provided with an air inlet and liquid inlet hole (21a) connected to the suction channel (3), wherein the piston (22) and the pressure chamber (21) are slidably sealed, wherein the suction channel (3) is connected to the liquid spray channel (4), wherein one end of the suction channel (3) is provided with a liquid inlet hole connected to a liquid storage bottle, wherein the other end of the liquid spray channel (4) is provided with a liquid outlet hole (4a), wherein a head cap (5) is installed on the gun body (1), wherein a diversion structure (6) for converting liquid into spray is provided between the gun body (1) and the head cap (5), wherein a spray hole (5a) movably connected to the diversion structure (6) is provided on the head cap (5), and wherein the diversion structure (6) is connected to the liquid outlet hole (4a); A first opening and closing structure (7) for opening or closing the liquid spraying channel (4) is provided in the liquid spraying channel (4), the first opening and closing structure (7) comprising a first opening and closing body (71) and a first elastic member (72) connected to each other, a limiting structure (41) having a first opening and closing opening (41a) is provided in the liquid spraying channel (4), the first elastic member (72) is slidably arranged on the liquid spraying channel (4), the first opening and closing body (71) can telescopically open the first opening and closing opening (41a) or be sealed with the first opening and closing opening (41a), and a gap is left between the first opening and closing body (71) and the inner wall of the liquid spraying channel (4); A second opening and closing structure (8) for opening or closing the suction channel (3) is provided in the suction channel (3); the second opening and closing structure (8) comprises a second opening and closing body (81) and an elastic sealing member (82) connected to each other; the second opening and closing body (81) and the elastic sealing member (82) are both located below the air inlet and liquid inlet holes (21a); ​​the second opening and closing body (81) is sealed in the suction channel (3); a liquid channel (81a) communicating with a liquid storage bottle is provided on the second opening and closing body (81); a liquid through hole (81b) is provided on the liquid channel (81a); the elastic sealing member (82) is elastically sealed with the inner wall of the suction channel (3); a liquid through cavity (83) communicating with the liquid through hole (81b) is formed between the elastic sealing member (82), the second opening and closing body (81) and the inner wall of the suction channel (3); The first opening and closing structure (7) further comprises a flow diverter head (73) slidably arranged on the liquid outlet hole (4a) and abutting against the flow diverter structure (6); the flow diverter head (73) is connected to the first elastic member (72); a plurality of flow diverter channels (73a) connecting the liquid spray channel (4) and the flow diverter structure (6) are arranged at intervals on the outer wall of the flow diverter head (73); The first elastic member (72) comprises a plurality of connected arc-shaped curved portions (72a), which are generally wavy in shape, and the side walls of two adjacent arc-shaped curved portions (72a) are provided with corresponding limiting blocks (72b) which can be closely attached to each other; The elastic sealing member (82) is a bowl-shaped structure with a larger upper end and a smaller lower end. The lower end of the elastic sealing member (82) is clamped in the liquid channel (81a). The wall thickness of the elastic sealing member (82) gradually decreases from bottom to top.

2. The spray gun head according to claim 1, characterized in that: A pressing handle (10) is hingedly connected to the gun body (1), and a sliding structure (11) is provided between the pressing handle (10) and the piston (22).

3. The spray gun head according to claim 2, characterized in that: The sliding structure (11) is a sliding hole and a limiting shaft that are slidably connected in a matching manner, or a sliding groove (11a) and a limiting protrusion (11b) that are slidably arranged in a matching manner.

4. The spray gun head according to claim 3, characterized in that: A guide plate (12) is provided on the gun body (1), and a second elastic member (13) is provided between the pressing handle (10) and the guide plate (12). The second elastic member (13) includes a first elastic portion (13a), and a first clamping portion (13b) is provided at one end of the first elastic portion (13a). The first clamping portion (13b) is clamped with the pressing handle (10), and the other end of the first elastic portion (13a) is slidably abutted against the guide plate (12).

5. The spray gun head according to claim 4, characterized in that: The first elastic portion (13a) is provided with an abutment portion (13c) that cooperates with and abuts against the guide plate (12).

6. The spray gun head according to claim 5, characterized in that: The guide plate (12) is arranged obliquely or is an arc-shaped guide plate.

7. The spray gun head according to claim 6, characterized in that: The first elastic portion (13a) and the guide plate (12) are arranged on two sides of the gun body (1) opposite to each other, and one end of the two first elastic portions (13a) is respectively connected to two sides of the first clamping portion (13b).

8. The spray gun head according to claim 1 or 2, characterized in that: The piston (22) comprises a connecting rod (22a) and a piston body (22b) which are connected to each other. The connecting rod (22a) is connected to the pressing handle (10) via a sliding structure (11). The piston body (22b) is provided with an outer skirt (22c) which is sealed with the inner wall of the pressure chamber (21).

9. The spray gun head according to claim 8, characterized in that: A guide sleeve (211) is provided on the pressure chamber (21), and the guide sleeve (211) is slidably connected to the connecting rod (22a).

10. The spray gun head according to claim 1, characterized in that: The head cap (5) is rotatably connected to the gun body (1); the flow diversion structure (6) comprises a flow diversion plate (61) and a flow diversion body (62); the flow diversion plate (61) is sealedly connected to the gun body (1); the flow diversion body (62) is mounted on the flow diversion plate (61); a liquid inlet cavity (63) is provided between the outer wall of the flow diversion body (62) and the inner wall of the head cap (5) or the gun body (1); a collecting groove (61a) is provided on the flow diversion plate (61); the collecting groove (61a) communicates with the liquid outlet (4a) and the liquid inlet cavity (63); 3), a plurality of first diverter grooves (62a) are arranged at intervals on the outer wall of the diverter body (62), a plurality of spray channels (5b) connected to the liquid inlet chamber (63) are arranged on the inner wall of the head cap (5), a plurality of guide blocks (51) are arranged at intervals in the head cap (5), a guide groove (51a) is formed between two adjacent guide blocks (51), the first diverter groove (62a) is connected to the spray channel (5b), and the guide groove (51a) connects the spray channel (5b) and the spray hole (5a).

11. The spray gun head according to claim 10, characterized in that: A plurality of flow-dividing holes (61b) are provided on the inner wall of the collecting groove (61a), and the flow-dividing holes (61b) penetrate the flow-dividing plate (61) to connect the collecting groove (61a) and the liquid inlet cavity (63).

12. The spray gun head according to claim 11, characterized in that: The gun body (1) is also provided with a spray cover body (9), and the head cap (5) is movably connected to the spray cover body (9).

13. The spray gun head according to claim 10, characterized in that: The gun body (1) is provided with a rotating sleeve (14) connecting the liquid spray channel (4) and the diverter disk (61), and a sealing sleeve (52) is provided in the head cap (5). The head cap (5) and the rotating sleeve (14) are rotatably sealed. The rotating sleeve (14) is sleeved on the sealing sleeve (52). The diverter disk (61) and the rotating sleeve (14) are sealed. A liquid inlet cavity (63) is formed between the diverter body (62) and the inner wall of the rotating sleeve (14) or the sealing sleeve (52). The diverter body (62) is inserted into the sealing sleeve (52) and abuts against the guide block (51) of the head cap (5). The spray channel (5b) is arranged on the inner wall of the sealing sleeve (52), and the guide block (51) is located in the sealing sleeve (52).

14. The spray gun head according to claim 13, characterized in that: A positioning piece (15) is provided between the diverter plate (61) and the rotating sleeve (14).

15. The spray gun head according to claim 1, characterized in that: The pressure chamber (21) is arranged horizontally or inclined.

16. The spray gun head according to claim 15, characterized in that: A mounting seat (16) is provided at one end of the second opening and closing body (81) close to the liquid inlet hole, an air return port (16a) is provided on the mounting seat (16), and a connecting piece (17) movably connected to the liquid storage bottle is installed on the mounting seat (16).

17. The spray gun head according to claim 16, characterized in that: The first opening and closing structure (7) and the second opening and closing structure (8) are both made of plastic.

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