Anti-pressing structure of emulsion pump

Abstract

The utility model provides a kind of anti-mispress structure of emulsion pump, belong to mechanical technical field.It solves the problem that current emulsion pump is easily mispressed in transportation or carrying process.A kind of anti-mispress structure of emulsion pump, emulsion pump includes screw cap and gland, the top of screw cap has installation port, one end of the gland extends into screw cap from installation port and can slide up and down relative to screw cap, anti-mispress structure includes the clamping block fixedly connected at the edge of installation port, the clamping block is made of plastic material and can be elastically deformed under stress, the outer wall of the gland is correspondingly provided with a bayonet, the clamping block is partially clamped into the bayonet, and the top of the clamping block abuts against the top wall of the bayonet, the clamping block side wall also has a wedge-shaped or arc-shaped thrust surface, and rotating the gland can push the clamping block outward along the thrust surface to make it disengage from the bayonet.By rotating the gland, the switch between anti-mispress and normal pressing use can be realized, which is convenient for carrying and transporting, and the structure is also simple and easy to manufacture.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to an anti-accidental pressure structure for an emulsion pump. Background Technology

[0002] Emulsion pumps are widely used in various cosmetics and toiletries such as bath products. They typically include a screw cap for connecting to the container, a suction tube connected to the screw cap and extending into the container, and a pressure cap that can be pressed up and down. The pressure cap contains a pump core. Pressing the pressure cap causes it to move up and down relative to the screw cap, and the negative pressure can draw out the emulsion from the container.

[0003] For example, Chinese patent application (application number: 200610027850.6) discloses a spring-loaded emulsion pump, including a pump head, a toothed sleeve, a connecting conduit, a piston, a cylinder, a gasket, a return spring, an upper ball, a lower ball, and a suction tube. The upper end of the connecting conduit is connected to the pump head, and the lower end is connected to the piston to form a cap. The upper end of the cylinder is connected to the toothed sleeve to form a screw cap, and the lower end of the cylinder is connected to the suction tube. The screw cap is used to fix it to the container. The lower end of the connecting conduit is connected to a spring washer. The return spring is set inside the cylinder, with its lower end abutting against a step on the inner wall of the cylinder and its upper end abutting against the spring washer. Pressing the pump head of the cap can cause the entire cap to move downward relative to the screw cap, thus reducing the volume of the cylinder. Releasing the pump head allows the entire cap to move upward relative to the screw cap under the action of the return spring, increasing the volume of the cylinder and generating negative pressure to draw emulsion from the container.

[0004] The aforementioned emulsion pump dispenses emulsion from the cap by pressing the nozzle, making it convenient to use. However, during transportation or carrying, the emulsion pump is easily damaged by external force, causing the emulsion to spray out of the nozzle and resulting in waste. It also brings unnecessary cleaning problems to the user. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an anti-accidental pressure structure for emulsion pumps. The technical problem to be solved by this invention is that existing emulsion pumps are prone to accidental pressure during transportation or carrying.

[0006] The purpose of this utility model can be achieved through the following technical solution: an anti-accidental pressure structure for an emulsion pump, the emulsion pump including a screw cap and a pressure cap, the top of the screw cap having an installation port, one end of the pressure cap extending into the screw cap from the installation port and being able to slide up and down relative to the screw cap, characterized in that the anti-accidental pressure structure includes a locking block fixedly connected to the edge of the installation port, the locking block being made of plastic material and capable of elastic deformation under force, the outer wall of the pressure cap having a corresponding locking slot, the locking block partially locking into the locking slot and the top of the locking block abutting against the top wall of the locking slot, the side wall of the locking block also having a wedge-shaped or arc-shaped pushing surface, and rotating the pressure cap can push the locking block outward along the pushing surface to disengage it from the locking slot.

[0007] In this emulsion pump, a locking block is installed on the screw cap, and a locking slot is provided on the pressure cap. The locking block engages within the slot, with its top abutting against the top wall of the slot. This locking block effectively limits the pressure cap, preventing it from being pressed down. This prevents accidental pressure during transportation or carrying, avoiding emulsion waste and unnecessary cleaning hassles for the user. Because the locking block is made of plastic and can elastically deform under pressure, when needed, simply rotating the pressure cap allows the arc or wedge-shaped guide surface to push the locking block outwards, disengaging it from the slot and pressing it against the outer circumference of the pressure cap. This releases the locking block from limiting the pressure cap's upper and lower limits, allowing the pressure cap to be pressed normally. When repositioning the pump, simply reverse the rotation of the pressure cap, causing the locking block to re-engage in the slot, thus again preventing accidental pressure. Moreover, the anti-accidental pressure structure of this emulsion pump is simply a one-piece injection molded block on the screw cap and a locking slot on the pressure cap. The structure is simple and easy to manufacture.

[0008] In the aforementioned anti-accidental pressure structure of the emulsion pump, the lower end of the locking block is fixed to the edge of the mounting port, and the upper end of the locking block is inclined inward. The upper part of the locking block is inserted into the aforementioned slot, and the pushing surface is located on the upper side wall of the locking block. With this configuration, the locking block is not easily damaged after deformation under force. Moreover, after the rotating cap pushes the locking block away from the slot under the action of the pushing surface, the locking block tends to remain against the cap. During use, it can guide the up-and-down movement of the cap. Furthermore, after rotating the cap in the opposite direction again, the locking block can be inserted back into the slot under the action of elastic deformation force, thus again limiting and preventing accidental pressure.

[0009] In the aforementioned anti-accidental pressure structure of the emulsion pump, one side wall of the latch is a wedge-shaped or arc-shaped guide surface that mates with the pushing surface of the latching block. This mating structure design allows the cap to rotate smoothly, enabling the latching block to disengage from the latch and ensuring normal pressing.

[0010] In the aforementioned anti-mispressure structure of the emulsion pump, the locking blocks are numerous and evenly distributed circumferentially along the mounting opening. The pressure cap has corresponding locking slots, and the locking blocks can engage with the corresponding slots. This design ensures that when the locking blocks engage with the slots, the force applied to all parts is uniform, providing a stable limit for the pressure cap. When the locking blocks disengage from the slots, they evenly press against the perimeter of the pressure cap, providing stable guidance for the up-and-down pressure of the pressure cap and preventing tilting.

[0011] In the aforementioned anti-mispressure structure of the emulsion pump, the edge of the mounting port also has several arc-shaped abutment flanges. These abutment flanges are spaced apart from the locking blocks and abut against the outer wall of the cap. The abutment flanges further limit the cap's radial movement and provide stable guidance in the circumferential direction.

[0012] In the aforementioned anti-accidental pressure structure of the emulsion pump, the other side wall of the latch is a vertical abutment surface, and the latch block has a vertical limiting surface that mates with the aforementioned vertical abutment surface. With this design, when transportation or carrying is required, the cap can be rotated in the reverse direction until the vertical limiting surface on the latch block abuts against the vertical abutment surface of the latch block. At this point, the cap can no longer be rotated, indicating that the latch block has been re-engaged into the latch, making operation convenient. Furthermore, when it is necessary to release the limiting mechanism, the cap can only be rotated in one direction.

[0013] In the aforementioned anti-mispressure structure of the emulsion pump, the cap has a cylindrical guide tube with an upper opening forming the aforementioned mounting port. The gland has a mounting tube, and the inner wall of the guide tube has a conical guide wall with the smaller end facing downwards. The lower end of the mounting tube extends into the guide tube and abuts against the guide wall. The outer wall of the mounting tube has several aforementioned latches, which are vertically penetrating the lower end of the mounting tube. Under the action of the latches, the lower end of the mounting tube can undergo radial elastic deformation. When the gland is pressed, the entire gland moves downwards relative to the cap, and the lower end of the mounting tube moves downwards synchronously along the guide wall. Because the guide wall is conical, the lower end of the mounting tube is squeezed inwards during the downward movement. Due to the inherent properties of the plastic, the lower end of the mounting tube can undergo radial elastic deformation to store energy. When the gland is released, the lower end of the mounting tube releases the stored energy and radially resets, causing the entire gland to move upwards along the guide wall to achieve reset. The bayonet design serves two main purposes: first, during carrying or transportation, the bayonet engages with the locking block on the cap to limit movement and prevent accidental pressure; second, during normal use of the emulsion pump, the bayonet provides deformation space for the lower end of the mounting cylinder, allowing it to undergo radial elastic deformation and store energy under stress. Furthermore, both the mounting cylinder and the guide cylinder are made of plastic and can be injection molded together with the cap and screw cap. This means that the original return spring and spring washer are eliminated; the return function can be achieved solely through the structure of the cap and screw cap themselves. The structure is simple, easy to install, and entirely made of plastic with no metal parts, resulting in lower cost, lighter weight, and easier recycling.

[0014] Compared with existing technologies, the anti-accidental pressure structure of this emulsion pump has the following advantages: by integrally injection molding a locking block on the cap and setting a locking slot on the pressure cap, and with the wedge-shaped or arc-shaped push surface design on the locking block, the switch between anti-accidental pressure and normal pressing can be achieved by rotating the pressure cap, which is convenient to carry and transport, and the structure is simple and easy to manufacture. Attached Figure Description

[0015] Figure 1 This is a perspective view of the emulsion pump of this utility model.

[0016] Figure 2 This is a cross-sectional view of the emulsion pump of this utility model.

[0017] Figure 3 It is a 3D diagram of a screw cap.

[0018] Figure 4 This is the front view of the pressure cap.

[0019] Figure 5 yes Figure 4 A cross-sectional view along the AA direction.

[0020] Figure 6 This is a cross-sectional view of a utility model emulsion pump without the suction tube.

[0021] In the diagram, 1. Screw cap; 1a. Guide cylinder; 1a1. Mounting port; 1a2. Guide wall; 1b. Locking block; 1b1. Pushing surface; 1b2. Vertical limiting surface; 1c. Abutting flange; 1d. Piston tube; 2. Pressure cap; 2a. Locking opening; 2a1. Guide surface; 2a2. Vertical abutting surface; 2b. Mounting cylinder; 2c. Discharge pipe; 3. Suction pipe; 4. One-way valve cap. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] like Figure 1 , 2As shown in Figure 6, this emulsion pump includes a screw cap 1, a pressure cap 2, a suction tube 3, a piston tube 1d, and a one-way valve cap 4. Both the screw cap 1 and the pressure cap 2 are made of plastic material. The screw cap 1 has an internal thread and can be threaded to a container. The screw cap 1 has a cylindrical guide tube 1a, and the upper opening of the guide tube 1a forms an installation port 1a1. The pressure cap 2 has a liquid outlet pipe 2c and a liquid outlet port communicating with the liquid outlet pipe 2c. The pressure cap 2 also has a mounting cylinder 2b surrounding the liquid outlet pipe 2c. The inner wall of the guide cylinder 1a has a conical guide wall 1a2 with the small end facing downwards. The lower end of the mounting cylinder 2b extends into the guide cylinder 1a from the mounting port 1a1 and abuts against the guide wall 1a2. The pressure cap 2 can slide up and down relative to the screw cap 1. The outer wall of the mounting cylinder 2b has several latches 2a. The latches 2a are set vertically through the lower end of the mounting cylinder 2b, and the lower end of the mounting cylinder 2b can undergo radial elastic deformation under the force of the latches 2a. The lower end of the liquid outlet pipe 2c is locked and fixed to the piston tube 1d. The outer wall of the piston tube 1d is connected to the screw cap 1 through a weakened structure. Pressing the pressure cap 2 downwards can cause the weakened structure between the piston tube 1d and the screw cap 1 to break, thereby causing the piston tube 1d to move downwards together. The suction tube 3 is snapped and fixed at the lower end of the guide tube 1a. The lower end of the piston tube 1d extends into the suction tube 3 and is sealed against the inner wall of the suction tube 3. A one-way valve cap 4 is fixed in the middle of the piston tube 1d. The suction tube 3 and the outlet tube 2c are connected in one direction through the action of the one-way valve cap 4.

[0024] Specifically, such as Figure 2 and 3 As shown, the anti-accidental pressure structure includes a locking block 1b fixedly connected to the edge of the mounting port 1a1 and the aforementioned locking port 2a. The lower end of the locking block 1b is fixed to the edge of the mounting port 1a1, and the upper end of the locking block 1b is inclined inward. The locking block 1b is made of plastic material and can undergo elastic deformation under force. The upper part of the locking block 1b is inserted into the locking port 2a, and the top of the locking block 1b abuts against the top wall of the locking port 2a. The upper side wall of the locking block 1b also has a wedge-shaped or arc-shaped pushing surface 1b1, and rotating the pressure cover 2 can push the locking block outward along the pushing surface 1b1 to disengage it from the locking port 2a. The card block 1b has several and is evenly distributed around the circumference of the mounting opening 1a1. The card opening 2a also has several corresponding card blocks. The edge of the mounting opening 1a1 also has several arc-shaped abutting flanges 1c. The abutting flanges 1c are spaced apart from the card block 1b and abut against the outer wall of the pressure cover 2.

[0025] Furthermore, such as Figure 4 and 5 As shown, one side wall of the latch 2a is a wedge-shaped or arc-shaped guide surface 2a1 that cooperates with the pushing surface 1b 1 of the latch block 1b, and the other side wall of the latch 2a is a vertical abutment surface 2a2. The latch block 1b has a vertical limiting surface 1b2 that cooperates with the vertical abutment surface 2a2.

[0026] This emulsion pump can be used with containers containing emulsions such as shower gel. The screw cap 1 is connected to the opening of the container and has a one-way structure that allows the container to communicate with the outside in one direction. When it leaves the factory, the piston tube 1d is integrated with the screw cap 1 through a weakened structure, which serves as an anti-counterfeiting measure to prevent unscrupulous merchants from refilling inferior emulsions. The upper part of the locking block 1b is engaged in the locking slot 2a to prevent accidental pressure, thus avoiding waste of emulsion and unnecessary cleaning trouble for the user. The emulsion level in the suction tube 3 is flush with the emulsion level in the container. Upon first use, simply rotate the pressure cap 2. Through the arc or wedge-shaped guiding action of the pushing surface 1b1, the pressure cap 2 can push the locking block 1b outward during rotation, causing it to disengage from the locking slot 2a and press against the outer peripheral wall of the pressure cap 2. The locking block 1b releases the upper and lower limits of the pressure cap 2. Pressing the cap 2 causes the weakened structure to break, separating the piston tube 1d from the cap 1. Pressing the cap 2 further downwards causes it to move downwards relative to the cap 1, and the piston tube 1d moves downwards simultaneously relative to the suction tube 3. The space inside the suction tube 3 is compressed. After the space inside the suction tube 3 is drained through the one-way valve cap 4, the emulsion in the suction tube 3 pushes open the one-way valve cap and enters the piston tube 1d. The lower end of the mounting cylinder 2b moves downwards synchronously along the guide wall 1a2. Because the guide wall 1a2 is conical, the lower end of the mounting cylinder 2b is squeezed inwards during the downward movement. Due to the properties of the plastic itself, the lower end of the mounting cylinder 2b can undergo radial elastic deformation to store energy. Then, the cap 2 is released, and the lower end of the mounting cylinder 2b releases the stored energy and radially resets, causing the entire cap 2 to move upwards along the guide wall 1a2 to reset. The piston tube 1d also moves upwards to reset, creating negative pressure in the suction tube 3, causing the emulsion level to rise. This reduces the amount of air drawn in from the outside, maintaining pressure balance. Pressing the cap 2 again causes the piston tube 1d to move downwards again. The emulsion in the suction tube 3 enters the piston tube 1d through the one-way valve cap 4. The emulsion already present in the piston tube 1d is squeezed out from the outlet tube 2c of the cap 2. Releasing the cap 2 again causes the piston tube 1d to move upwards and reset due to the elastic reset action of the mounting cylinder 2b. The emulsion in the suction tube 3 moves upwards under negative pressure, and the emulsion in the container continuously enters the suction tube 3. The emulsion in the container reduces the intake of air from the outside to maintain pressure balance. This process is repeated to expel the emulsion. When it is time to carry the pump again, simply rotate the cap 2 in the opposite direction so that the locking block 1b re-engages into the locking slot 2a, thus limiting the cap 2 and preventing accidental pressure. The anti-accidental pressure structure of this emulsion pump is simply achieved by integrally injection molding the locking block 1b on the cap 1 and setting the locking slot 2a on the cap 2. The structure is simple and easy to manufacture.

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0028] Although this document frequently uses terms such as screw cap 1, guide cylinder 1a, mounting port 1a1, guide wall 1a2, locking block, pushing surface 1b1, vertical limiting surface 1b2, abutting flange 1c, piston tube 1d, pressure cap 2, bayonet 2a, guide surface 2a1, vertical abutting surface 2a2, mounting cylinder 2b, liquid outlet pipe 2c, liquid suction pipe 3, and one-way valve cap 4, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An anti-accidental pressure structure for an emulsion pump, the emulsion pump comprising a screw cap (1) and a pressure cap (2), wherein the top of the screw cap (1) has a mounting port (1a1), and one end of the pressure cap (2) extends into the screw cap (1) from the mounting port (1a1) and is capable of sliding up and down relative to the screw cap (1), characterized in that, The anti-accidental pressure structure includes a locking block (1b) fixedly connected to the edge of the mounting port (1a1). The locking block (1b) is made of plastic material and can undergo elastic deformation under force. The outer wall of the pressure cover (2) is provided with a corresponding slot (2a). The locking block (1b) is partially inserted into the slot (2a) and the top of the locking block (1b) abuts against the top wall of the slot (2a). The side wall of the locking block (1b) also has a wedge-shaped or arc-shaped pushing surface (1b1). Rotating the pressure cover (2) can push the locking block (1b) outward along the pushing surface (1b1) to disengage it from the slot (2a).

2. The anti-mispressure structure for an emulsion pump according to claim 1, characterized in that, The lower end of the locking block (1b) is fixed at the edge of the mounting port (1a1), the upper end of the locking block (1b) is inclined inward, the upper part of the locking block (1b) is inserted into the above-mentioned slot (2a), and the pushing surface (1b1) is located on the upper side wall of the locking block (1b).

3. The anti-mispressure structure for an emulsion pump according to claim 1 or 2, characterized in that, One sidewall of the latch (2a) is a wedge-shaped or arc-shaped guide surface (2a1) that cooperates with the pushing surface (1b1) of the latch block (1b).

4. The anti-mispressure structure for an emulsion pump according to claim 1 or 2, characterized in that, The card block (1b) has a plurality of them and is evenly distributed around the mounting opening (1a1). The cover (2) is provided with a plurality of slots (2a) corresponding to each other. The card block (1b) can be inserted into the corresponding slot (2a).

5. The anti-mispressure structure for an emulsion pump according to claim 4, characterized in that, The mounting port (1a1) also has several arc-shaped abutting flanges (1c) at its edge. The abutting flanges (1c) are spaced apart from the locking block (1b) and abut against the outer wall of the cover (2).

6. The anti-mispressure structure for an emulsion pump according to claim 3, characterized in that, The other side wall of the bayonet (2a) is a vertical abutment surface (2a2), and the card block (1b) has a vertical limiting surface (1b2) that cooperates with the vertical abutment surface (2a2).

7. The anti-mispressure structure for an emulsion pump according to claim 1 or 2, characterized in that, The cap (1) has a cylindrical guide tube (1a), the upper end of which is open to form the mounting port (1a1). The cap (2) has a mounting tube (2b), the inner wall of which has a conical mounting port (1a2) with the small end facing down. The lower end of the mounting tube (2b) extends into the guide tube (1a) and abuts against the mounting port (1a2). The outer wall of the mounting tube (2b) has several of the aforementioned slots (2a). The slots (2a) are arranged vertically through the lower end of the mounting tube (2b), and under the action of the slots (2a), the lower end of the mounting tube (2b) can undergo radial elastic deformation.

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