Oblique piston chamber snap-on type sprayer

Abstract

An inclined piston chamber trigger-type sprayer, in which the piston chamber is inclined, uses a 7-shaped plastic spring as a reset element to reset the trigger. The plastic spring is provided with a fitting portion, an elastic portion and a hook portion, and the trigger is provided with corresponding pry blocks and top blocks. A push block and a return pull rod are arranged below the trigger, and the return pull rod is matched with a universal ball head arranged at the top of the piston. It adopts a two-stage energy storage and reset plastic spring structure. Compared with the existing trigger-type sprayer, it has a better feel, a rapid reset start, and a longer service life.

Description

Technical Field

[0001] The present invention relates to a sprayer, in particular to an inclined piston chamber hand-held sprayer. Background Art

[0002] For a small sprayer, its working process is as follows: through a suction pipe connected to an inlet check valve, it introduces a piston chamber with a variable space, and then is connected to an outlet check valve at the outlet through a diversion channel. After passing through the check valve, it enters the atomizing nozzle. A reset mechanism is provided on the compression chamber, and the reset mechanism usually consists of a trigger and an elastic element. The trigger is also called a hand-held part. The spray nozzle is usually horizontally arranged, while the suction pipe is vertically arranged inside the bottle body. A hand-held part movement mechanism is also provided near the nozzle opening, and the hand-held part is connected to the piston part of the compression chamber. Squeezing the trigger makes the space of the compression chamber shrink. Since the inlet check valve is closed at this time, the liquid in the compression chamber flows out through the outlet check valve and is atomized and sprayed after passing through the atomizing nozzle. After releasing the trigger, the compression chamber is reset by the reset mechanism such as a spring, a spring piece, etc., and the space in the compression chamber becomes larger. At this time, the outlet check valve is closed, and the inlet check valve is opened to draw the liquid in the bottle and supplement it into the compression chamber for standby.

[0003] In the existing market, most use a piston chamber with an internal spring structure as the compression chamber. The spring is soaked in liquid for a long time, which is prone to embrittlement, corrosion and fracture failure, resulting in failures of the entire sprayer. In addition, when the sprayer is recycled as waste, the metal spring and other plastic parts are classified into different recycling categories and cannot be directly crushed by machine, making it very troublesome to disassemble the metal parts. To solve this problem, such as in the patent No. CN201210412068.1 "Improved Structure of Plastic Spring for Hand-held Sprayer and Its Using Method", it is designed to solve the technical problems of poor structural design of existing similar products. The design key points of this hand-held sprayer are that the plastic spring is composed of symmetric "L"-shaped side edges to form a loop buckle. A resisting column is provided at the front end of the plastic spring connecting the symmetric two side edges, and a buckling rib is provided at the rear end; that is, the loop hole of the plastic spring is sleeved on the outer diameter of the piston hole of the main body and the outer diameter of the reinforcing rib of the main body. The resisting column of the plastic spring abuts against the concave and convex parts of the groove of the wrench and is in concave-convex fit. The buckling rib of the plastic spring abuts and cooperates with the reinforcing rib at the straw end of the main body; the piston rod is composed of a piston and a connecting rod. An inner convex ring rib is provided on the inner diameter of the piston, and a piston blade ring is provided on the outer diameter. The inner convex ring rib of the piston is in concave-convex buckling connection with the outer concave ring rib of the connecting rod.

[0004] Its piston chamber is horizontally placed, and the plastic spring stores energy by surrounding the piston chamber and deforming the upper half of the lever. The main stress points and deformation points in its structure are located at the turning point of the cross bar and the surrounding body. The structure at this place is very thick, and it is also the place where deformation fatigue is most likely to occur during use, resulting in elastic failure of the plastic spring. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an inclined piston chamber trigger-type sprayer with a novel structure, improve the deformation structure of the plastic spring, obtain a better hand feeling, and extend the service life of the sprayer.

[0006] The technical solution adopted by the present invention to solve the above problems: An inclined piston chamber trigger-type sprayer is composed of a main body, a large cover connected to the bottle body, a straw, an inlet check valve, a piston chamber, a diversion channel, an outlet check valve, an atomizing nozzle, and a head cap. The piston of the piston chamber is connected to the trigger, and the rotating shaft of the handle is arranged below the outlet check valve. The diversion channel is divided into a liquid inlet channel in the vertical direction and a liquid outlet channel in the horizontal direction. The liquid inlet channel includes a straw and an inlet check valve and extends to the piston chamber. The liquid outlet channel extends from the outlet of the piston chamber through the outlet check valve to the head cap. Its characteristics are as follows: The piston chamber is arranged obliquely, and a liquid inlet and a liquid outlet are arranged on the inner wall of the piston chamber. The liquid inlet is communicated with the inlet check valve, and the liquid outlet is communicated with the diversion channel. A plastic spring is arranged above the piston chamber. The plastic spring is approximately in the shape of a '7'. The upper half of the plastic spring is a fitting part, and the fitting part is attached to and fastened to the lower part of the liquid outlet channel of the main body. The lower half of the plastic spring is composed of an elastic part and a hook part. In the static state, the elastic part is attached to the outer wall of the piston chamber. A top block and a pry block are arranged on the handle. When the trigger is pressed tightly, the pry block on the handle raises the elastic part, causing it to deform. When further pressed tightly, the top block comes into contact with the hook part and pushes the hook part to bend and deform.

[0007] A push block and a return pull rod are arranged on the handle. The return pull rod is hooked to a universal ball head, and the universal ball head is installed in a ball head cavity on one side of the piston.

[0008] The push block on the handle abuts against the top of the piston, and the top of the push block is arc-shaped.

[0009] A reinforcing rib is arranged between the liquid outlet channel on the main body and the piston chamber. In order to avoid this reinforcing rib, the plastic spring is provided with an upper fitting groove and a lower fitting groove.

[0010] A connection port is arranged on the universal ball head. The connection port is composed of an outer ring, a guiding rib, and a hooking ring. A barb is arranged at the top of the return pull rod on the handle, and the barb cooperates with the hooking ring.

[0011] A chamfered conical surface is arranged on the side wall of the barb, and a conical surface is also arranged on the guiding rib. The two cooperate with each other. When they come into contact, the inclined surfaces of the two are misaligned with each other, so that the return pull rod can automatically correct its position when inserted into the universal ball head.

[0012] The inclination angle of the piston chamber is 30 degrees to 60 degrees.

[0013] An elastic rib is additionally arranged between the fitting part and the elastic part of the plastic spring.

[0014] Compared with the prior art, the present invention adopts a plastic spring structure imitating the shape of a reversed 7, and divides the energy storage process into two stages through structural design. In the first stage, the pry block on the handle contacts the elastic part of the plastic spring, causing the elastic part to bend and generating a weak deformation restoring force. At this stage, the elastic force of the plastic spring is small, and the force of pinching the trigger with the finger is mainly transmitted to the piston, pushing the piston to do work and quickly squeezing out the liquid in the piston cavity to form a spray. In the second stage, when the elastic part reaches a predetermined position, the hook part of the plastic spring starts to contact the top block, and then the hook part is squeezed and deformed. The yield force at this stage is large, causing the piston to decelerate rapidly, and the finger feels that the resistance becomes significantly larger until the limit position is reached.

[0015] The present invention adopts the method of using the push block on the trigger to push the piston and the plastic spring to store energy to reserve the restoring force. After releasing the hand, the hook part of the plastic spring will release a strong restoring force, enabling the piston to reset and start faster, which is beneficial to quickly opening the inlet check valve and simultaneously quickly closing the outlet check valve, accelerating the liquid inlet process.

[0016] All the component structural designs of the present invention are conducive to automatic assembly on an automated production line, reducing manual participation, beneficial to reducing the failure rate of the product, and improving production efficiency. It is a fully plastic product without metal springs, etc., and can be directly crushed as plastic waste, which is beneficial to waste sorting and environmental protection. Description of the Drawings

[0017] Figure 1 It is an external view of the sprayer.

[0018] Figure 2 It is a structural diagram of the sprayer in the initial state.

[0019] Figure 3 It is a state diagram at the end of the first stage.

[0020] Figure 4 It is a state diagram after the end of the second stage.

[0021] Figure 5 It is a perspective view from above of the plastic spring.

[0022] Figure 6 It is a perspective view from below of the plastic spring.

[0023] Figure 7 It is a perspective view of the universal ball head.

[0024] Figure 8 It is a diagram showing the mating relationship between the universal ball head and the return pull rod.

[0025] Figure 9 It is a diagram showing the adjustment relationship between the return pull rod and the guiding ribs of the universal ball head.

[0026] Figure 10 It is a top view of the trigger.

[0027] Figure 11 It is a structure diagram of the main body, trigger, piston chamber, and plastic spring for removing the upper cover and the lower cover.

[0028] Figure 12 It is a plastic spring with elastic ribs added.

[0029] Figure 13 It is a state diagram at the end of the first stage after adding elastic ribs.

[0030] Among them, 1 is the main body, 2 is the trigger, 3 is the plastic spring, 4 is the universal ball head, 5 is the piston chamber, 6 is the outlet check valve, 7 is the inlet check valve, 8 is the straw, 9 is the large circle, and 10 is the head cap.

[0031] 11 is the upper cover, 12 is the lower cover, and 13 is the reinforcing rib on the main body.

[0032] 21 is the top block, 22 is the pry block, 23 is the push block, 24 is the return pull rod, and 25 is the head barb of the return pull rod.

[0033] 31 is the fitting part, 32 is the elastic part, 33 is the hook part, 34 is the upper fitting groove, 35 is the lower fitting groove, and 36 is the elastic rib.

[0034] 41 is the ball head, 42 is the outer ring, 43 is the guiding rib, 44 is the hook ring, and 51 is the piston. Specific embodiments

[0035] The present invention will be further described in detail below with reference to the accompanying drawings.

[0036] An inclined piston chamber trigger-type sprayer is composed of a main body, a large cover connected to the bottle body, a straw, an inlet check valve, a piston chamber, a diversion channel, an outlet check valve, an atomizing nozzle, and a head cap. The piston of the piston chamber is connected to the trigger, and the rotating shaft of the handle is arranged below the outlet check valve. The diversion channel is divided into a vertical liquid inlet channel and a horizontal transverse liquid outlet channel. The liquid inlet channel includes a straw and an inlet check valve and leads to the piston chamber. The liquid outlet channel leads from the outlet of the piston chamber through the outlet check valve to the head cap.

[0037] Among them, the inclination angle of the piston chamber is 30 degrees to 60 degrees. The piston chamber is inclined, saving horizontal space and making the structure more compact.

[0038] The inner wall of the piston chamber is provided with a liquid inlet and a liquid outlet, as Figure 2As shown, the liquid inlet of the piston chamber communicates with the liquid inlet check valve, and the liquid outlet of the piston chamber communicates with the horizontal liquid outlet channel; a plastic spring is arranged above the piston chamber. The plastic spring is approximately in the shape of a '7'. The upper half of the plastic spring is the fitting part, which fits and fastens to the lower part of the liquid outlet channel of the main body. The lower half of the plastic spring consists of an elastic part and a hook part; in the static state, the elastic part is attached to the outer wall of the piston chamber. A top block and a pry block are arranged on the handle. When the trigger is pressed tightly, the pry block on the handle pries up the elastic part, causing it to deform; when further pressed, the top block comes into contact with the hook part and pushes the hook part to bend and deform.

[0039] A push block and a return pull rod are arranged on the handle. The return pull rod is hooked to a universal ball head, and the universal ball head is installed in the ball head cavity on one side of the piston.

[0040] The push block on the handle abuts against the top of the piston, and the top of the push block is arc-shaped.

[0041] A reinforcing rib is arranged between the lower part of the liquid outlet channel of the main body and the piston chamber. This reinforcing rib can improve the strength of the piston chamber arranged on the main body. In order to avoid this reinforcing rib, the plastic spring is provided with an upper fitting groove and a lower fitting groove.

[0042] A connection port is arranged on the universal ball head. The connection port consists of an outer ring, a guiding rib and a hook ring. A barb is arranged at the top of the return pull rod on the handle. The barb cooperates with the hook ring to lock the return pull rod and the universal ball head, and can automatically adjust the position of the return pull rod along with the movement of the piston.

[0043] A chamfered conical surface is arranged on the side wall of the barb, and a conical surface is also arranged on the guiding rib. The two cooperate with each other. When they come into contact, the inclined surfaces of the two are misaligned with each other, so that the position of the return pull rod is automatically corrected when it is inserted into the universal ball head.

[0044] In order to increase the elasticity of the plastic spring, an elastic rib 26 can also be added between the fitting part and the elastic part, as Figure 12 and Figure 13 shown. The elastic rib can further strengthen the elastic force of the elastic part.

[0045] During its energy storage process in use, it is divided into two stages. The first stage is that the pry block on the handle comes into contact with the elastic part of the plastic spring, causing the elastic part to bend and generating a weak deformation restoring force. At this stage, the elastic force of the plastic spring is small, and the force of pinching the trigger with the finger is mainly transmitted to the piston, pushing the piston to do work and quickly squeezing the liquid in the piston chamber

[0046] out to form a spray; in the second stage, when the elastic part reaches the predetermined position, the hook part of the plastic spring starts to contact the top block, and then the hook part is squeezed and deformed. The yield force at this stage is large, causing the piston to move rapidly decelerate, and the finger feels that the resistance becomes significantly larger until the limit position is reached.

[0047] After the finger releases the trigger, the hook part and the elastic part work together to quickly start the piston. The volume in the piston chamber increases rapidly, causing the liquid pressure in the diversion channel to drop rapidly. The water outlet check valve closes quickly, and the water inlet check valve opens to replenish the liquid in the piston chamber.

[0048] After the deformation of the hook part ends, the top block and the hook part separate, and the elastic part gradually recovers. Cooperating with the pry block, it continues to push the trigger to reset. The return pull rod on the trigger pulls the universal ball head to drive the piston to reset until the initial state is reached.

[0049] After adding the elastic ribs, the restoring force of the elastic part will become stronger. The deformation of the elastic ribs will prevent the elastic part from deforming and increase the resilience.

Claims

1. An inclined piston chamber trigger-type sprayer, which is composed of a main body, a large cover connected to the bottle body, a straw, an inlet check valve, a piston chamber, a diversion channel, an outlet check valve, an atomizing nozzle, and a head cap; the piston of the piston chamber is connected to the trigger, and the rotating shaft of the handle is arranged below the outlet check valve; the diversion channel is divided into a liquid inlet channel in the vertical direction and a liquid outlet channel in the horizontal direction. The liquid inlet channel includes a straw and an inlet check valve and leads to the piston chamber; the liquid outlet channel leads from the outlet of the piston chamber through the outlet check valve to the head cap; its characteristics are as follows: The piston chamber is arranged obliquely. An inlet and an outlet are provided on the inner wall of the piston chamber. The inlet communicates with the inlet check valve, and the outlet communicates with the diversion channel. A plastic spring is arranged above the piston chamber. The plastic spring is approximately in the shape of a '7'. The upper part of the plastic spring is a fitting part, which is attached to and fastened to the lower part of the liquid outlet channel of the main body. The lower part of the plastic spring consists of an elastic part and a hook part. A top block and a pry block are arranged on the handle. In the static state, the elastic part is attached to the outer wall of the piston chamber. When the trigger is pressed tightly, the pry block on the handle pries up the elastic part, causing it to deform. At this stage, the elastic force of the plastic spring is small, and it pushes the piston to do work, quickly squeezing out the liquid in the piston chamber to form a spray. When further pressed tightly, the top block comes into contact with the hook part and pushes the hook part to bend and deform. The yield force at this stage is large, causing the piston to decelerate rapidly in motion, and the finger feels that the resistance becomes significantly larger until the limit position is reached. A push block and a return pull rod are arranged on the handle. The return pull rod is hooked to a universal ball head, and the universal ball head is installed in a ball head cavity on one side of the piston. The inclination angle of the piston chamber is 30 degrees to 60 degrees.

2. The inclined piston chamber trigger-type sprayer according to claim 1, characterized in that: The push block on the handle abuts against the top of the piston, and the top of the push block is arc-shaped.

3. The inclined piston chamber trigger-type sprayer according to claim 1, characterized in that: Reinforcing ribs are provided between the liquid outlet channel on the main body and the piston chamber. To avoid these reinforcing ribs, the plastic spring is provided with an upper fitting groove and a lower fitting groove.

4. The inclined piston chamber trigger-type sprayer according to claim 1, characterized in that: A connection port is arranged on the universal ball head. The connection port consists of an outer ring, a guiding rib, and a hook ring. A barb is arranged at the top of the return pull rod on the handle, and the barb cooperates with the hook ring.

5. The inclined piston chamber trigger-type sprayer according to claim 4, characterized in that: A chamfered conical surface is arranged on the side wall of the barb, and a conical surface is also arranged on the guiding rib. The two cooperate with each other. When they come into contact, the inclined surfaces of the two are misaligned with each other, so that the return pull rod automatically corrects its position when inserted into the universal ball head.

6. The inclined piston chamber trigger-type sprayer according to claim 1, characterized in that: An elastic rib is additionally arranged between the fitting part and the elastic part of the plastic spring.

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