A fully plastic pistol spray pump

Abstract

The invention discloses a fully plastic pistol spray pump, comprising a pump body, a lock cover connected to the lower part of the pump body, a liquid spray channel arranged in the pump body, a nozzle arranged at the outlet of the liquid spray channel, a liquid outlet channel and a liquid inlet channel separated up and down arranged in the pump body, wherein the liquid outlet channel is connected with the liquid spray channel, a liquid introduction cavity is arranged at the sides of the liquid outlet channel and the liquid inlet channel, the upper part of the liquid introduction cavity is always connected with the liquid outlet channel through a normal opening, a suction plug is arranged in the liquid introduction cavity, a trigger which can drive the suction plug to make left and right piston movement in the liquid introduction cavity is hingedly connected to the pump body, an elastic arm which can press on the pump body and drive the trigger to drive the suction plug to reset, a lateral one-way valve which can be opened to connect the liquid introduction cavity and the liquid inlet channel when the suction plug resets is arranged between the liquid introduction cavity and the liquid inlet channel, and the pump has the characteristics of simple structure, high liquid introduction efficiency, and can fully utilize the solution sucked into the liquid introduction cavity by the pump.

Description

[Technical field]

[0001] The invention relates to a fully plastic pistol spray pump. [Background technology]

[0002] Existing pistol spray pumps usually have a one-way valve arranged in the liquid inlet channel. When liquid is introduced, the suction plug expands to enlarge the liquid introduction chamber and generate negative pressure, and then the liquid introduction channel generates negative pressure through the connecting port between the liquid introduction chamber and the liquid introduction channel, thereby opening the one-way valve, allowing liquid to enter the liquid introduction channel and then enter the liquid introduction chamber through the connecting port. Due to the negative pressure generated in the liquid introduction chamber, it is necessary to generate negative pressure in the liquid introduction channel through the connecting port before opening the one-way valve and allowing liquid to enter through the pressure difference between the liquid introduction channel and the suction pipe, which affects the liquid introduction efficiency. When the trigger is pulled, the solution flows out from the liquid introduction chamber through the connecting port to the liquid introduction channel. The one-way valve can only be closed when the pressure in the liquid introduction channel reaches a certain value. Before closing, part of the solution will flow back into the suction pipe or the bottle body, reducing the effective utilization rate of the solution sucked into the liquid introduction chamber by the pump.

[0003] The present invention is made based on this situation. [Summary of the invention]

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a fully plastic pistol spray pump which has the characteristics of simple structure, high liquid intake efficiency and the ability to fully utilize the solution sucked into the liquid inlet chamber by the pump.

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

[0006] A fully plastic pistol spray pump comprises a pump body, a locking cover is connected to the lower part of the pump body, a liquid spray channel is arranged in the pump body, a nozzle is arranged at the outlet of the liquid spray channel, a liquid outlet channel and a liquid inlet channel separated up and down are arranged in the pump body, wherein the liquid outlet channel is connected to the liquid spray channel, a liquid introduction cavity is arranged on the sides of the liquid outlet channel and the liquid inlet channel, the upper part of the liquid introduction cavity is always connected to the liquid outlet channel through a normal opening, a suction plug is arranged in the liquid introduction cavity, a trigger is hinged on the pump body and can drive the suction plug to do left and right piston movement in the liquid introduction cavity, the trigger is provided with an elastic arm that can press on the pump body and drive the trigger to drive the suction plug to reset, and a lateral one-way valve is arranged between the liquid introduction cavity and the liquid inlet channel and can be opened to connect the liquid introduction cavity and the liquid inlet channel when the suction plug resets.

[0007] In the all-plastic pistol spray pump as described above, the lateral one-way valve includes a T-shaped valve plug, the valve plug includes a fixed shaft and an elastic valve plate, the edge of the valve plate is provided with a convex ring located on one side of the fixed shaft, the pump body is provided with an axial hole and a connecting hole connecting the liquid inlet chamber and the liquid inlet channel, the axial hole and the connecting hole are located on the inner side of the convex ring, the fixed shaft is fixed on the axial hole, the right bottom of the liquid inlet chamber is provided with a flat bottom opposite to the convex ring, the convex ring is abutted against the flat bottom through the elastic action of the valve plate and achieves sealing.

[0008] As described above, the all-plastic pistol spray pump has multiple communicating holes arranged around the outer side of the shaft hole, and the communicating holes are connected with the shaft hole as a whole to form a plum blossom hole structure, and a convex strip protruding toward one side of the valve plate and supported on the right side of the valve plate is provided between two adjacent communicating holes, and a communicating cavity that is always in a connected state with the communicating holes is formed between the flat bottom, the convex ring, the valve plate and the convex strip.

[0009] In the all-plastic pistol spray pump as described above, the suction plug includes a plug rod, and a main one-way sealing ring and a secondary one-way sealing ring arranged on the outside of the plug rod, the main one-way sealing ring is arranged at the right end of the plug rod, and the secondary one-way sealing ring is arranged on the left side of the main one-way sealing ring, the main one-way sealing ring and the secondary one-way sealing ring form a left-right double sealing structure with the inner wall of the liquid inlet cavity, an annular groove with a notch facing right is provided between the main one-way sealing ring and the plug rod, a positioning ring protruding to the left in the liquid inlet cavity is provided on the right bottom of the liquid inlet cavity, the positioning ring surrounds the valve plug inside and is opposite to the annular groove on the left and right, and the positioning ring is provided with a notch corresponding to the normal opening.

[0010] In the all-plastic pistol spray pump as described above, the spray channel and the liquid outlet channel are arranged at a certain angle, and the inlet of the spray channel is arranged in the middle of the liquid outlet channel. A longitudinal one-way valve is arranged between the liquid outlet channel and the spray channel so that only liquid can flow from the liquid outlet channel to the spray channel. The longitudinal one-way valve includes an elastic telescopic part located at the upper part of the liquid outlet channel, the elastic telescopic part is hollow and a pressure edge is arranged at the upper end thereof facing outward, the pump body is connected to a shell, the shell is provided with a sleeve ring which is sleeved on the outer side of the liquid outlet channel from top to bottom, and the shell is provided with a sleeve ring located on the inner side of the sleeve ring for pressing the upper end of the longitudinal one-way valve so as to press the pressure edge tightly against the upper part of the liquid outlet channel. A pressure ring on the edge of the port, the pressure edge seals the pressure ring and the upper port of the liquid outlet channel, a movable part that can move up and down in the liquid outlet channel is connected below the elastic telescopic part, a circular ring is provided at the lower end of the movable part, and a circular hole for inserting the circular ring to achieve a sealed connection is provided above the normally open part of the liquid outlet channel, a step is provided at the bottom of the circular hole to block the circular ring from below, the elastic telescopic part elastically presses the movable part downward to insert the circular ring into the circular hole, an inner hole is provided on the longitudinal one-way valve, and a positioning rod is provided on the outer shell, which is inserted downward into the inner hole and can support the bottom of the inner hole from above to limit the rising height of the movable part when the movable part moves upward.

[0011] In the all-plastic pistol spray pump as described above, the upper end of the movable part is provided with a one-way sealing ring located above the inlet of the spray channel, the one-way sealing ring is sealed and connected to the liquid outlet channel, and two or more gaps are provided on the side of the elastic telescopic part in the circumferential direction.

[0012] In the all-plastic pistol spray pump as described above, the elastic telescopic portion is a bowl-shaped structure.

[0013] As described above, a fully plastic pistol spray pump is provided at the outlet of the liquid spray channel, the nozzle is sleeved on the outside of the joint and can rotate relative to the joint, a raised buckle is provided on the outer side of the joint, a slot is provided in the nozzle for the buckle to be inserted into and prevent the nozzle from falling out of the joint, the slot is an arc-shaped slot arranged around the joint and for the buckle to rotate a certain angle therein, a liquid outlet connected to the liquid spray channel is provided on the joint, the nozzle is provided with a sealing connecting ring inserted in the liquid outlet and sealed with the inner wall of the liquid outlet, and a blocking mechanism is provided between the nozzle and the liquid outlet which can block the liquid from spraying after the nozzle is rotated a certain angle.

[0014] In the all-plastic pistol spray pump as described above, the blocking mechanism includes a sleeve column located on the inner side of the sealing connection ring, and a center column arranged at the liquid outlet and extending into the sleeve column, the inner bottom of the sleeve column is provided with a first groove connected to the nozzle outlet, the inner side wall of the sleeve column is provided with a second groove connected to the liquid outlet, and the center column is provided with a third groove that can connect the first groove and the second groove, and the nozzle is rotated to make the second groove offset from the third groove to block the connection between the first groove and the second groove.

[0015] In the fully plastic pistol spray pump as described above, the spring arm and the trigger are integrally injection molded, there are two spring arms and they are respectively located on the left and right sides of the pump body, the spring arm is a curved structure protruding upward, a hook is provided at the rear end of the spring arm, and a hook groove cooperating with the hook is provided at the rear of the pump body.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The pistol spray pump of the present invention has its components all made of plastic, which is environmentally friendly and safe, avoids the corrosion problem caused by metal components such as metal springs, is environmentally friendly and safe, can better meet EU recycling standards, and improve resource recycling rate.

[0018] 2. By setting a lateral one-way valve between the liquid inlet cavity and the liquid inlet channel, when the suction plug moves outward, the volume of the liquid inlet cavity increases, generating negative pressure, and directly acting on the lateral one-way valve, opening the lateral one-way valve, so that the liquid in the bottle enters the liquid inlet cavity through the suction tube and the liquid inlet channel, and the liquid inlet efficiency is high. When the trigger is squeezed, the solution in the liquid inlet cavity can quickly push the lateral one-way valve to close, preventing the liquid from flowing back into the bottle; and by using a normally open opening to always connect the liquid inlet cavity and the liquid outlet channel, when the trigger is squeezed, the explosive force of the solution flowing out of the liquid inlet cavity to the liquid outlet channel can be increased.

[0019] 3. There are multiple communicating holes and they are arranged around the outer side of the shaft hole to form a plum blossom hole structure. A convex strip supported on the right side of the valve plate is provided between two adjacent communicating holes, and a communicating cavity that is always in communication with the communicating holes is formed between the flat bottom, the convex ring, the valve plate and the convex strip. The communicating cavity is connected with the bottle and filled with liquid during normal use. When the negative pressure generated in the liquid introduction cavity reaches a set value, the liquid presses the valve plate from all sides from the communicating holes around the fixed shaft, so that the convex ring instantly detaches from the flat bottom to open the channel, so that the liquid can quickly enter the liquid introduction cavity from all sides. When the trigger is squeezed, the valve plate can be quickly pushed by the liquid to press the convex ring on the flat bottom to prevent liquid reflux.

[0020] 4. The suction plug has a double sealing structure, which can enhance the sealing performance and effectively protect the exhaust hole from liquid overflow.

[0021] 5. The longitudinal one-way valve adopts a circular ring and a circular hole with a fully fitted sealing design. The elastic telescopic part is made of highly elastic material. When the trigger is pulled to make the internal liquid pressure reach the design value, the channel will be opened instantly to achieve an explosive spray effect; when it is closed, it can achieve an instantaneous closing effect, which ensures the stability of the seal while also improving the quantitative accuracy. The positioning rod blocks the active part and limits the height of the ring being pushed up, which can ensure that the channel is open enough for the liquid to be sprayed out, and after the spraying is completed, the ring can be inserted into the circular hole in time and quickly to close the channel to prevent backflow.

[0022] 6. The nozzle adopts a rotating self-locking design, which is easy to use, stable in function and high in assembly efficiency.

[0023] 7. The trigger and the spring arm are integrally injection molded, which has a simple structure, reduces parts, reduces manufacturing costs, and improves assembly efficiency.

Brief Description of the Drawings

[0024] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 It is a cross-sectional view of an embodiment of a fully plastic pistol spray pump of the present invention;

[0026] Figure 2 yes Figure 1 A partial enlarged view in FIG.

[0027] Figure 3 yes Figure 1 A partial enlarged view of B;

[0028] Figure 4 is an exploded view of a second embodiment of the longitudinal one-way valve of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the pump body;

[0030] Figure 6 is a cross-sectional view of a second embodiment of an all-plastic pistol spray pump of the present invention;

[0031] Figure 7 yes Figure 6 A schematic structural diagram of a longitudinal one-way valve corresponding to the embodiment in FIG.

[0032] Figure 8 is a cross-sectional view of a third embodiment of an all-plastic pistol spray pump of the present invention;

[0033] Fig. 9 yes Figure 8 Schematic diagram of the structure of the longitudinal one-way valve corresponding to the embodiment in FIG. [Specific implementation method]

[0034] The present invention will be further described below in conjunction with the accompanying drawings:

[0035] like Figures 1 to 9 As shown, a fully plastic pistol spray pump comprises a pump body 1, a locking cover 8 is connected to the lower part of the pump body 1, and the locking cover 8 is used to connect with a bottle, a liquid spraying channel 11 is arranged in the pump body 1, and a nozzle 2 is arranged at the outlet of the liquid spraying channel 11, and a liquid outlet channel 12 and a liquid inlet channel 13 separated from each other are arranged in the pump body 1, wherein the liquid outlet channel 12 is connected to the liquid spraying channel 11, and a liquid inlet cavity 14 is arranged on the side of the liquid outlet channel 12 and the liquid inlet channel 13, and the liquid inlet cavity 14 The upper part is always connected with the liquid outlet channel 12 through the normal opening 15, a suction plug 3 is provided in the liquid inlet chamber 14, a trigger 4 is hinged on the pump body 1 and can drive the suction plug 3 to do left and right piston movement in the liquid inlet chamber 14, and the trigger 4 is provided with an elastic arm 5 that can press on the pump body 1 and drive the trigger 4 to drive the suction plug 3 to reset, and a lateral one-way valve is provided between the liquid inlet chamber 14 and the liquid inlet channel 13, which can be opened to connect the liquid inlet chamber 14 and the liquid inlet channel 13 when the suction plug 3 resets.

[0036] The liquid inlet channel 13 is used to communicate with the straw inserted into the bottle. A lateral one-way valve is arranged between the liquid inlet chamber 14 and the liquid inlet channel 13. When the elastic arm 5 bounces the trigger 4 to move the suction plug 3 outward, the volume of the liquid inlet chamber 14 increases, generating negative pressure, and directly acting on the lateral one-way valve, so that the lateral one-way valve opens, and the liquid in the bottle enters the liquid inlet chamber 14 through the straw and the liquid inlet channel 13, and the liquid inlet efficiency is high. When the trigger 4 is pressed, the solution in the liquid inlet chamber 14 can quickly push the lateral one-way valve to close under the push of the suction plug 3, so as to prevent the liquid from flowing back into the bottle; and the liquid inlet chamber 14 and the liquid outlet channel 12 are always connected by the normal opening 15. When the trigger 4 is pressed, the explosive force of the solution flowing out from the liquid inlet chamber 14 to the liquid outlet channel 12 can be increased, which is conducive to improving the explosive force of the spray.

[0037] like Figure 1 , Figure 2 , Figure 6 and Figure 8 In the illustrated embodiment, the lateral one-way valve comprises a T-shaped valve plug 6, which is made of a high-strength elastic material. The valve plug 6 comprises a fixed shaft 61 and an elastic valve plate 62. A convex ring 63 located on one side of the fixed shaft 61 is provided on the edge of the valve plate 62. An axial hole 16 and a connecting hole 17 connecting the liquid inlet chamber 14 and the liquid inlet channel 13 are provided on the pump body 1. The axial hole 16 and the connecting hole 17 are located on the inner side of the convex ring 63. The fixed shaft 61 is fixed on the axial hole 16. A flat bottom 140 opposite to the convex ring 63 is provided on the right bottom of the liquid inlet chamber 14. The convex ring 63 is abutted against the flat bottom 140 through the elastic action of the valve plate 62 and achieves sealing. It has good sealing performance, simple structure and is easy to manufacture.

[0038] like Figure 5 In the embodiment shown, the communicating holes 17 are multiple and arranged around the outer side of the shaft hole 16, and the communicating holes 17 are connected with the shaft hole 16 to form a plum blossom hole structure, which is simple in structure and simplifies the molding mold. Figure 2 As shown, a convex strip 170 protruding toward one side of the valve plate 62 and supported on the right side of the valve plate 62 is provided between two adjacent communication holes 17, and a communication cavity 630 that is always in communication with the communication hole 17 is formed between the flat bottom 140, the convex ring 63, the valve plate 62 and the convex strip 170. The communication cavity 630 is in communication with the bottle and filled with liquid during normal use. When the negative pressure generated in the liquid introduction cavity 14 reaches a set value, the liquid presses the valve plate 62 from the surrounding areas through the communication holes 17 around the fixed shaft 61, so that the convex ring 63 is instantly separated from the flat bottom 140 to open the channel, so that the liquid can quickly enter the liquid introduction cavity 14 from the surrounding areas. When the trigger 4 is pressed, the valve plate 62 can be quickly pushed by the liquid to press the convex ring 63 on the flat bottom 140 to prevent the liquid from flowing back.

[0039] like Figure 1 , Figure 6 and Figure 8 In the embodiment shown, the suction plug 3 includes a plug rod 31, and a main one-way sealing ring 32 and a secondary one-way sealing ring 33 arranged on the outside of the plug rod 31. The main one-way sealing ring 32 is arranged at the right end of the plug rod 31, and the secondary one-way sealing ring 33 is arranged on the left side of the main one-way sealing ring 32. The main one-way sealing ring 32 and the secondary one-way sealing ring 33 form a left-right double sealing structure with the inner wall of the liquid introduction chamber 14. When the trigger 4 is in the pop-up state, the secondary one-way sealing ring 33 is located on the left side of the exhaust hole 143, and the main one-way sealing ring 32 is located on the right side of the exhaust hole 143, which can enhance the sealing performance and effectively protect the exhaust hole 143 from liquid overflow. The exhaust hole 143 communicates with the inside of the lock cover 8 and the left part of the liquid introduction chamber 14. When the trigger 4 is pressed, the secondary one-way sealing ring 33 moves to the right side of the exhaust hole 143, so that the exhaust hole is connected to the external air through the cavity opening of the liquid introduction chamber 14.

[0040] An annular groove 34 with a notch facing right is provided between the main one-way sealing ring 32 and the plug rod 31. A positioning ring 141 protruding leftward in the liquid inlet cavity 14 is provided on the right bottom of the liquid inlet cavity 14. The positioning ring 141 surrounds the valve plug 6 inside and is opposite to the annular groove 34 on the left and right. The positioning ring 141 is provided with a notch 142 corresponding to the normal opening 15. When the trigger 4 is pressed, the positioning ring 141 can be inserted into the annular groove 34 to squeeze out the liquid in the annular groove 34, and the right end of the plug rod 31 is inserted into the positioning ring 141, so that the liquid in the liquid inlet cavity 14 is pressed out as much as possible to improve the utilization rate.

[0041] like Figures 1 to 9In the illustrated embodiment, the liquid injection channel 11 and the liquid outlet channel 12 are arranged at a certain angle, and the inlet of the liquid injection channel 11 is arranged in the middle of the liquid outlet channel 12, and a longitudinal one-way valve 7 is arranged between the liquid outlet channel 12 and the liquid injection channel 11, which only allows liquid to flow from the liquid outlet channel 12 to the liquid injection channel 11, and the longitudinal one-way valve 7 includes an elastic telescopic portion 71 located at the upper part of the liquid outlet channel 12, and the elastic telescopic portion 71 is hollow and a pressure edge 711 is arranged at the upper end thereof toward the outside, and a shell 9 is connected to the pump body 1, and a sleeve ring 91 is arranged on the shell 9 and is sleeved on the outer side of the liquid outlet channel 12 from top to bottom, and a pressure ring 92 is arranged on the inner side of the sleeve ring 91 on the shell 9 for pressing the upper end of the longitudinal one-way valve 7 to press the pressure edge 711 tightly against the edge of the upper port of the liquid outlet channel 12, and the pressure ring 92 is arranged on the inner side of the sleeve ring 91, and the pressure ring 92 is arranged on the inner side of the sleeve ring 91, and is used for pressing the upper end of the longitudinal one-way valve 7 to press the pressure edge 711 tightly against the edge of the upper port of the liquid outlet channel 12. The edge 711 seals and connects the pressure ring 92 and the upper end of the liquid outlet channel 12. A movable part 72 that can move up and down in the liquid outlet channel 12 is connected below the elastic telescopic part 71. A circular ring 721 is provided at the lower end of the movable part 72. A circular hole 121 is provided on the liquid outlet channel 12 above the normal opening 15 for the circular ring 721 to be inserted to achieve a sealed connection. A step 19 is provided at the bottom of the circular hole 121 for blocking the circular ring 721 from below. The elastic telescopic part 71 elastically presses the movable part 72 downward so that the circular ring 721 is inserted into the circular hole 121. An inner hole 70 is provided on the longitudinal one-way valve 7. A positioning rod 93 is provided on the outer shell 9, which is inserted downward into the inner hole 70 and can support the bottom of the inner hole 70 from above to limit the rising height of the movable part 72 when the movable part 72 moves upward.

[0042] By adopting the circular periphery full-fitting sealing design of the circular ring 721 and the circular hole 121, the elastic telescopic part 71 is made of highly elastic material. When the trigger 4 is pressed to make the internal liquid pressure reach the design value, the channel will be instantly opened to achieve an explosive spraying effect; and when closing, it can achieve an instantaneous closing effect, which not only ensures the stability of the seal but also improves the quantitative accuracy. The positioning rod 93 blocks the movable part 72 and limits the height of the circular ring 721 being pushed up, which can ensure that the channel is open enough for the liquid to be sprayed out, and after the spraying is completed, the circular ring 721 can be inserted into the circular hole 121 in time and quickly to close the channel to prevent backflow.

[0043] like Figure 1 and Figure 4 The illustrated embodiment, and Figure 6 and Figure 7The illustrated embodiments are two implementations of the longitudinal one-way valve 7. The upper end of the movable portion 72 is provided with a one-way sealing ring 73 located above the inlet of the liquid injection channel 11. The one-way sealing ring 73 is sealed and connected to the liquid outlet channel 12. Two or more gaps 74 are provided on the side of the elastic telescopic portion 71 in a circumferential direction. The elastic force of the elastic telescopic portion 71 can be adjusted by designing the gaps 74. The double sealing structure of the one-way sealing ring 73 and the pressure edge 711 can enhance the sealing performance and effectively prevent liquid from overflowing.

[0044] like Figure 4 In the embodiment shown, the elastic telescopic portion 71 is a bowl-shaped structure, and two gaps 74 are provided on its side in the circumferential direction, so that the driving force required for its initial contraction and deformation is small, and it is easy to be pushed up from the bottom by the solution to connect the liquid outlet channel 12 and the liquid injection channel 11; and when the movable portion 72 moves upward to deform the elastic telescopic portion 71 to a certain amount, it can have good elastic force, so that it can rebound quickly and push the movable portion 72 to return to its original position when the negative pressure is reduced.

[0045] like Figure 8 and Fig. 9 The illustrated embodiment is a third implementation of the longitudinal one-way valve 7. The middle portion of the elastic telescopic portion 71 is concave from the side, and its side wall is an integrated annular structure with strong elastic force and rapid rebound.

[0046] like Figure 3 and Figure 5 In the illustrated embodiment, a circular joint 111 is provided at the outlet of the liquid spraying channel 11, the nozzle 2 is sleeved on the outside of the joint 111 and can rotate relative to the joint 111, a raised buckle 112 is provided on the outer surface of the joint 111, a clamping groove is provided in the nozzle 2 for the buckle 112 to be clamped in and prevent the nozzle 2 from escaping from the joint 111, the clamping groove is an arc groove arranged around the joint 111 and for the buckle 112 to rotate a certain angle therein, a liquid outlet 113 connected to the liquid spraying channel 11 is provided on the joint 111, the nozzle 2 is provided with a sealing connecting ring 22 inserted into the liquid outlet 113 and sealedly connected to the inner wall of the liquid outlet 113, a blocking mechanism is provided between the nozzle 2 and the liquid outlet 113, which can block the liquid from spraying after the nozzle 2 rotates a certain angle, so that when not in use, the trigger cannot be pressed by mistake and the liquid cannot be discharged, thereby realizing rotation self-locking.

[0047] The blocking mechanism includes a sleeve column 23 located inside the sealing connection ring 22, and a center column 114 arranged at the liquid outlet 113 and extending into the sleeve column 23. The inner bottom of the sleeve column 23 is provided with a first groove 24 connected to the outlet of the nozzle 2, and the inner wall of the sleeve column 23 is provided with a second groove 25 connected to the liquid outlet 113. The center column 114 is provided with a third groove 115 that can connect the first groove 24 with the second groove 25. The nozzle 2 is rotated so that the second groove 25 is staggered from the third groove 115 to block the connection between the first groove 24 and the second groove 25, so as to achieve blocking and prevent liquid from being discharged; the nozzle 2 is rotated so that the second groove 25 is connected to the third groove 115 and the first groove 24 to achieve connection, and the operation is simple and convenient.

[0048] like Figure 4 In the embodiment shown, the elastic arm 5 and the trigger 4 are integrally injection molded, and there are two elastic arms 5, which are respectively located on the left and right sides of the pump body 1, and the elastic arm 5 is a curved structure that bulges upward. A hook 51 is provided at the rear end of the elastic arm 5, and a hook groove 18 that cooperates with the hook 51 is provided at the rear of the pump body 1, which has a simple structure, reduces parts, reduces manufacturing costs, and improves assembly efficiency.

[0049] The components of the all-plastic pistol spray pump are all made of plastic, which is environmentally friendly and safe, and avoids the corrosion problem caused by the use of metal. The valve plug 6 and the longitudinal one-way valve 7 are made of PE material, and the pump body 1, nozzle 2, suction plug 3, trigger 4, spring arm 5, lock cover 8, and shell 9 are made of PP material, which is environmentally friendly and safe, can better meet EU recycling standards, and improve resource recycling rate.

Claims

1. A fully plastic pistol spray pump, characterized in that: The invention comprises a pump body (1), the lower part of which is connected to a lock cover (8), the pump body (1) being provided with a liquid spraying channel (11), the outlet of which is provided with a nozzle (2), the pump body (1) being provided with a liquid outlet channel (12) and a liquid inlet channel (13) separated from each other in an upper and lower manner, wherein the liquid outlet channel (12) is connected to the liquid spraying channel (11), a liquid introduction chamber (14) is provided on the sides of the liquid outlet channel (12) and the liquid inlet channel (13), the upper part of the liquid introduction chamber (14) is always connected to the liquid outlet channel (12) via a constant opening (15), a suction plug (3) is provided in the liquid introduction chamber (14), and a piston (2) is hingedly connected to the pump body (1) to drive the suction plug (3) to perform left and right piston movement in the liquid introduction chamber (14). A trigger (4), wherein the trigger (4) is provided with an elastic arm (5) capable of pressing against the pump body (1) and driving the trigger (4) to drive the suction plug (3) to reset; a lateral one-way valve is provided between the liquid inlet chamber (14) and the liquid inlet passage (13) and can be opened to connect the liquid inlet chamber (14) and the liquid inlet passage (13) when the suction plug (3) resets; the lateral one-way valve comprises a T-shaped valve plug (6); the valve plug (6) comprises a fixed shaft (61) and an elastic valve plate (62); a convex ring (63) located on one side of the fixed shaft (61) is provided on the edge of the valve plate (62); an axial hole (16) and a connecting hole (17) connecting the liquid inlet chamber (14) and the liquid inlet passage (13) are provided on the pump body (1); the axial hole (16) and the connecting hole (17) are connected to the pump body (1) and the pump body (1) The fixing shaft (61) is fixed on the shaft hole (16), and a flat bottom (140) opposite to the convex ring (63) is provided on the right bottom of the liquid introduction chamber (14). The convex ring (63) is pressed against the flat bottom (140) by the elastic action of the valve plate (62) to achieve sealing. There are a plurality of communicating holes (17) arranged around the outer side of the shaft hole (16), and the communicating holes (17) are connected to the shaft hole (16) to form a plum blossom hole structure. A convex strip (170) protruding toward one side of the valve plate (62) and supported on the right side of the valve plate (62) is provided between two adjacent communicating holes (17), and a connection hole (140) is formed between the flat bottom (140), the convex ring (63), the valve plate (62) and the convex strip (170). The through hole (17) is always in a communicating state, and the suction plug (3) comprises a plug rod (31), and a main one-way sealing ring (32) and a secondary one-way sealing ring (33) arranged on the outside of the plug rod (31). The main one-way sealing ring (32) is arranged at the right end of the plug rod (31), and the secondary one-way sealing ring (33) is arranged on the left side of the main one-way sealing ring (32). The main one-way sealing ring (32) and the secondary one-way sealing ring (33) form a left-right double sealing structure with the inner wall of the liquid introduction cavity (14). An annular groove (34) with a notch facing right is provided between the main one-way sealing ring (32) and the plug rod (31). A positioning ring (141) protruding leftward in the liquid introduction cavity (14) is provided on the right bottom of the liquid introduction cavity (14).The positioning ring (141) surrounds the valve plug (6) on the inner side and is opposite to the annular groove (34) on the left and right sides. The positioning ring (141) is provided with a notch (142) corresponding to the normal opening (15). The elastic arm (5) and the trigger (4) are integrally injection molded.

2. The all-plastic pistol spray pump according to claim 1, characterized in that: The liquid spray channel (11) and the liquid outlet channel (12) are arranged at a certain angle, and the inlet of the liquid spray channel (11) is arranged in the middle of the liquid outlet channel (12). A longitudinal one-way valve (7) is arranged between the liquid outlet channel (12) and the liquid spray channel (11) so as to allow liquid to flow from the liquid outlet channel (12) to the liquid spray channel (11). The longitudinal one-way valve (7) comprises an elastic telescopic portion (71) located at the upper part of the liquid outlet channel (12). The portion (71) is hollow and a pressure edge (711) is provided at its upper end toward the outside. The pump body (1) is connected to a housing (9). The housing (9) is provided with a collar (91) which is sleeved from top to bottom on the outside of the liquid outlet passage (12). The housing (9) is provided with a pressure ring (92) located on the inner side of the collar (91) for pressing the upper end of the longitudinal one-way valve (7) so as to press the pressure edge (711) against the edge of the upper port of the liquid outlet passage (12). The pressure edge (711) ) seals the pressure ring (92) and the upper end of the liquid outlet channel (12); a movable portion (72) capable of moving up and down in the liquid outlet channel (12) is connected below the elastic telescopic portion (71); a circular ring (721) is provided at the lower end of the movable portion (72); a circular hole (121) is provided on the liquid outlet channel (12) above the normal opening (15) for the circular ring (721) to be inserted to achieve a sealed connection; a hole (121) is provided at the bottom of the circular hole (121) for inserting the circular ring The elastic telescopic portion (71) elastically presses the movable portion (72) downward so that the ring (721) is inserted into the circular hole (121). The longitudinal one-way valve (7) is provided with an inner hole (70). The outer shell (9) is provided with a positioning rod (93) which is inserted downward into the inner hole (70) and can support the bottom of the inner hole (70) from above when the movable portion (72) moves upward to limit the rising height of the movable portion (72).

3. The all-plastic pistol spray pump according to claim 2, characterized in that: The upper end of the movable portion (72) is provided with a one-way sealing ring (73) located above the inlet of the liquid spraying channel (11), and the one-way sealing ring (73) is sealedly connected to the liquid outlet channel (12). Two or more gaps (74) are provided on the side surface of the elastic telescopic portion (71) in a circumferential direction.

4. The all-plastic pistol spray pump according to claim 3, characterized in that: The elastic telescopic portion (71) is a bowl-shaped structure.

5. The all-plastic pistol spray pump according to claim 1, characterized in that: A circular joint (111) is provided at the outlet of the liquid spraying channel (11), the nozzle (2) is sleeved on the outside of the joint (111) and can rotate relative to the joint (111), a protruding buckle (112) is provided on the outer surface of the joint (111), a clamping groove is provided in the nozzle (2) for the buckle (112) to be clamped in and prevent the nozzle (2) from falling out of the joint (111), the clamping groove is an arc-shaped groove arranged around the joint (111) and allows the buckle (112) to rotate within a certain angle, a liquid outlet (113) connected to the liquid spraying channel (11) is provided on the joint (111), the nozzle (2) is provided with a sealing connection ring (22) inserted into the liquid outlet (113) and sealedly connected to the inner wall of the liquid outlet (113), and a blocking mechanism is provided between the nozzle (2) and the liquid outlet (113) and can block the liquid from spraying after the nozzle (2) rotates a certain angle.

6. The all-plastic pistol spray pump according to claim 5, characterized in that: The blocking mechanism comprises a sleeve column (23) located inside the sealing connection ring (22), and a center column (114) arranged at the liquid outlet (113) and extending into the sleeve column (23); a first groove (24) communicating with an outlet of the nozzle (2) is provided at the inner bottom of the sleeve column (23); a second groove (25) communicating with the liquid outlet (113) is provided on the inner wall of the sleeve column (23); a third groove (115) communicating with the first groove (24) and the second groove (25) is provided on the center column (114); the nozzle (2) is rotated so that the second groove (25) is offset from the third groove (115), thereby blocking the communication between the first groove (24) and the second groove (25).

7. The all-plastic pistol spray pump according to claim 1, characterized in that: There are two elastic arms (5) respectively located on the left and right sides of the pump body (1); the elastic arm (5) is a curved structure protruding upward; a hook (51) is provided at the rear end of the elastic arm (5); and a hook groove (18) cooperating with the hook (51) is provided at the rear of the pump body (1).

Images