Small spray pump head

Abstract

The present application relates to a kind of small spray pump head, it is for the technical problems of the more inconvenient production assembly of similar products of prior art, higher production cost, especially poor spray effect when using, prone to siphon situation design.The gist is that the liquid outlet hole of the big circle is plunger hole, the plunger hole of the top of big circle is communicated with the suction pipe hole of bottom, the outer diameter of plunger hole of big circle is provided with sleeve rod groove and spring groove in turn, spring is arranged in the spring groove of big circle;The top of lower sleeve rod of inner plug is provided with upper elastic plug, the inner wall of lower sleeve rod of inner plug is provided with wall guide groove, the wall guide groove is communicated with the through hole of the top of inner plug;The center column of inner plug is sleeved into the plunger hole of big circle, while the lower sleeve rod of inner plug is sleeved into the sleeve rod groove of big circle, the outer diameter of lower ring groove of inner plug is elastic sleeve, spring is sealed in spring cavity, the top of upper elastic plug of inner plug is provided with upper cover groove, the upper cover groove of inner plug is provided with the cover sheet that is protruded upward, the through hole of inner plug is located in cover sheet.

Description

Technical Field

[0001] The invention relates to a spray head of a micro-sprayer, which is a small spray pump head. Background Art

[0002] The nozzle of a micro-sprayer is a plastic product used for cosmetic spraying. It is generally operated by pressing the head cap to spray, and a metal spring is generally provided inside the nozzle. For example, the application publication number CN110789842A disclosed in the Chinese patent literature, the application publication date 2020.02.14, the invention name "Antibacterial polymer push-type small nozzle and its preparation method"; another example is the application publication number CN103842033A disclosed in the Chinese patent application literature, the application publication date 2014.06.04, the invention name "Fan-shaped spray structure for use in a dispensing actuator". However, the above-mentioned nozzles and similar products generally require a valve stem with a large circle extending from the pump core to be combined with the head cap before they can be used. The production and assembly are relatively inconvenient, the production cost is relatively high, and in particular, the spray effect is poor during use, and backflow is prone to occur. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the present invention aims to provide a small spray pump head in the art that addresses the technical problems of existing similar products, such as the inconvenient production and assembly, high production costs, and, in particular, poor spray effect and the susceptibility to backflow during use. This objective is achieved through the following technical solutions.

[0004] A small spray pump head, which includes a head cap, an inner plug, a spring and a large circle. A spray hole is provided on one side of the head cap, and the inner plug is arranged in the liquid outlet hole of the large circle; the key points of its structural design are that the liquid outlet hole of the large circle is a plunger hole, the plunger hole at the top of the large circle is communicated with the straw hole at the bottom, the outer diameter of the plunger hole of the large circle is provided with a sleeve rod groove and a spring groove in sequence, and the spring is arranged in the spring groove of the large circle; the inner plug is T-shaped, and an upper spring plug is provided on the top of the lower sleeve rod of the inner plug, a center column is provided in the lower sleeve rod of the inner plug, and a wall guide groove is provided on the inner wall of the lower sleeve rod of the inner plug, and the wall guide groove is communicated with the through hole at the top of the inner plug; at the same time, the center column of the inner plug is inserted into the plunger hole of the large circle, and the lower sleeve rod of the inner plug is inserted into the sleeve rod groove of the large circle, one end of the spring is abutted against the bottom of the spring groove of the large circle, and the other end of the spring is abutted against the lower ring groove at the bottom of the upper spring plug of the inner plug; the outer diameter of the lower ring groove of the inner plug is an elastic sleeve, and the inner The notch at the lower ring groove of the plug and the outer notch of the spring groove of the large circle are against each other to form a spring cavity. The spring is sealed in the spring cavity. The top of the upper spring plug of the inner plug is provided with an upper cover groove. The upper cover groove of the inner plug is provided with an upwardly protruding cover plate. The through hole of the inner plug is located in the cover plate. Pressing the head cap, the inner plug moves downward. The spring, cover plate and elastic sleeve of the inner plug are deformed. The through hole of the inner plug is sealed by the cover plate. The liquid passes through the wall guide groove of the inner plug and the deformation of the cover plate and the elastic sleeve of the inner plug and is atomized and sprayed out of the nozzle of the head cap. The inner diameter of the head cap and the outer diameter of the upper spring plug of the inner plug and the outer diameter of the notch at the spring groove of the large circle are kept sealed. Loosening the head cap, the inner plug moves upward. The spring, cover plate and elastic sleeve of the inner plug are reset. The cover plate at the through hole of the inner plug opens. The gas passes through the gap between the inner diameter of the head cap and the large circle and inner plug, or the nozzle of the head cap and the wall guide groove of the inner plug and enters the large circle. The above-mentioned spring is a metal spring or a plastic spring.

[0005] The cover plate has a downwardly protruding sealing skirt along its edge, or the outer diameter of the sealing skirt is raised upward to fit the inner diameter bevel of the upper cover groove at the top of the inner plug. The sealing skirt of the cover plate seals against the through hole in the upper cover groove at the top of the inner plug. The above are two embodiments of the cover plate structure, and correspond to the design of a positioning pin or positioning ring structure to further improve its stability under deformation.

[0006] A raised positioning pin or positioning ring rib is provided in the middle of the top of the cover plate, and the positioning pin or positioning ring rib is inserted into the corresponding groove at the top of the head cap.

[0007] A raised step rib is provided at the chamfered outer diameter of the plunger hole at the bottom of the large ring sleeve rod groove. The step rib corresponds to the lower sleeve groove provided at the bottom of the lower sleeve rod of the inner plug. When the head cap is pressed, the lower sleeve groove of the inner plug is limited by the step rib of the large ring, and the notch at the lower ring groove of the inner plug is transformed into an outer shape and sealed to the inner diameter of the head cap. The above structure limits the travel of the head cap.

[0008] The bottom cap opening of the head cap is provided with an inwardly protruding cap opening rib, and the outer diameter of the large circle inside the head cap above the cap opening rib is provided with a protruding groove ring, the groove ring of the large circle is interference fit into the cap opening rib of the head cap, and the outer diameter below the cap opening ring is sealed against the cap opening rib of the head cap.

[0009] The outer diameter of the lower ring groove of the upper spring plug of the inner plug is tilted outward and extends, and is sealed against the inner diameter of the head cap; the outer diameter of the rod hole of the lower sleeve rod of the inner plug is tilted outward and extends, and is sealed against the inner wall of the sleeve rod groove of the large circle; the spray hole of the head cap is located on the upper side of the outer diameter of the groove of the lower ring groove that tilts outward.

[0010] The inner diameter of the groove of the lower ring groove of the inner plug is provided with an inner pouring mouth lower than the groove, and the inner pouring mouth is located above the outer diameter groove of the spring groove of the large circle; when the head cap is pressed, the inner pouring mouth of the inner plug is limited to the outer diameter groove of the spring groove of the large circle.

[0011] The inner wall of the lower sleeve rod of the inner plug is provided with three equally spaced wall guide grooves, which correspond to the three through holes on the top of the inner plug. The number of the wall guide grooves and the corresponding through holes of the inner plug can be set as needed.

[0012] The inner diameter of the bottom ring of the large ring is provided with a raised bottle mouth rib or an inner ring thread, and the large ring is fastened to the bottle mouth of the bottle body through the bottle mouth rib, or the large ring is rotated and fixed to the outer bottle mouth thread of the bottle body through the inner ring thread.

[0013] The large ring's inner diameter is provided with a raised inner bottle groove. The large ring is secured to the outer bottle's mouth via the ribs, while the large ring is secured to the inner bottle's mouth via the inner bottle groove. The securing method between the large ring and the bottle's mouth can be customized as needed. The pump head's bottom structure is suitable for both inner and outer bottle configurations secured by a sleeved mechanism, or for a single bottle configuration secured by a sleeved mechanism.

[0014] The invention has reasonable structural design, good sealing and stability, convenient production and assembly, wide application range, especially small size and good anti-backflow effect; it is suitable for use as a small spray pump head for daily cosmetics, and is a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 1 is a schematic cross-sectional structural diagram of embodiment 1 of the present invention, in which the framed portion is magnified, and arrows indicate the air inlet direction and the liquid outlet direction, respectively.

[0016] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure.

[0017] Figure 3 yes Figure 2 Schematic diagram of the explosion structure, where the dotted line is the spring.

[0018] Figure 4 yes Figure 3 Schematic diagram of the bottom explosion structure.

[0019] Figure 5 yes Figure 4 Schematic diagram of the bottom structure of the inner plug.

[0020] Figure 6 It is a schematic cross-sectional structural diagram of embodiment 2 of the present invention.

[0021] Serial number and name of the accompanying drawings: 1. Head cap, 101. Cap mouth rib, 2. Inner plug, 201. Lower sleeve rod, 2011. Center column, 2012. Wall guide groove, 2013. Lower sleeve groove, 202. Upper spring plug, 2021. Lower ring groove, 2022. Upper cover groove, 203. Through hole, 3. Spring, 4. Large circle, 401. Plunger hole, 4011. Step rib, 402. Sleeve rod groove, 403. Spring groove, 404. Notch ring, 405. Straw hole, 406. Bottle mouth rib, 407. Inner bottle groove, 5. Cover piece, 501. Sealing skirt, 502. Positioning pin. Implementation Method

[0022] Now, the structure of the present invention will be further described in conjunction with the accompanying drawings. Figure 1-Figure 5As shown, the pump head includes a head cap 1, an inner plug 2, a spring 3 and a large circle 4. A spray hole is provided on one side of the head cap, the inner plug is arranged in the liquid outlet hole of the large circle, and the spring is a metal spring. Its specific structure is as follows: the liquid outlet hole of the above-mentioned large circle is a plunger hole 401, the plunger hole at the top of the large circle is communicated with the straw hole 405 at the bottom, the outer diameter of the plunger hole of the large circle is provided with a sleeve rod groove 402 and a spring groove 403 in sequence, and the spring is arranged in the spring groove of the large circle; the inner plug is T-shaped, and an upper spring plug 202 is provided on the top of the lower sleeve rod 201 of the inner plug, and a center column 2011 is provided in the lower sleeve rod of the inner plug, and a wall guide groove 2012 is provided on the inner wall of the lower sleeve rod of the inner plug, and the wall guide groove is communicated with the through hole 203 at the top of the inner plug; the center column of the inner plug is inserted into the plunger hole of the large circle, and the lower sleeve rod of the inner plug is inserted into the sleeve rod groove of the large circle, one end of the spring is against the bottom of the spring groove of the large circle, and the other end of the spring is against the lower ring groove 2021 at the bottom of the upper spring plug of the inner plug; the outer diameter of the lower ring groove of the inner plug is an elastic sleeve, and the notch at the lower ring groove of the inner plug is consistent with the large circle. The outer notches of the spring groove of the ring are against each other to form a spring cavity, and the spring is sealed in the spring cavity. The top of the upper spring plug of the inner plug is provided with an upper cover groove 2022, and the upper cover groove of the inner plug is provided with an upwardly protruding cover plate 5, and the through hole of the inner plug is located in the cover plate; pressing the head cap, the inner plug moves downward, the spring, the cover plate and the elastic sleeve of the inner plug are deformed, and the through hole of the inner plug is sealed by the cover plate, and the liquid passes through the wall guide groove of the inner plug, and the deformation of the cover plate and the elastic sleeve of the inner plug and is atomized and sprayed out of the spray hole of the head cap. The inner diameter of the head cap and the outer diameter of the upper spring plug of the inner plug and the outer diameter of the notch at the spring groove of the large ring are kept sealed; loosening the head cap, the inner plug moves upward, the spring, the cover plate and the elastic sleeve of the inner plug are reset, the cover plate at the through hole of the inner plug is opened, and the gas passes through the gap between the inner diameter of the head cap and the large ring and the inner plug, or the spray hole of the head cap, and the wall guide groove of the inner plug and enters the large ring.

[0023] The edge of the cover is provided with a downwardly protruding sealing skirt 501, the outer diameter of which is upwardly curved to fit the inner diameter bevel of the upper cover groove at the top of the inner plug. The sealing skirt of the cover is sealed against the through hole in the upper cover groove at the top of the inner plug. A raised positioning pin 502 is provided in the middle of the top of the cover, which is inserted into the corresponding groove at the top of the head cap. Alternatively, Figure 6 As shown, the edge of the cover plate is provided with a downwardly protruding sealing skirt, and the middle of the top of the cover plate is provided with a protruding positioning ring rib, which is inserted into the corresponding groove at the top of the head cap.

[0024] A raised step rib 4011 is provided at the chamfered outer diameter of the plunger hole at the bottom of the sleeve rod groove of the large ring. The step rib corresponds to the lower sleeve groove 2013 provided at the bottom of the lower sleeve rod of the inner plug. When the head cap is pressed, the lower sleeve groove of the inner plug is limited by the step rib of the large ring, and the notch at the lower ring groove of the inner plug is deformed outward to seal against the inner diameter of the head cap. The bottom cap opening of the head cap is provided with an inwardly raised cap opening rib 101. Above the cap opening rib, the outer diameter of the large ring inside the head cap is provided with a raised notch ring 404. The notch ring of the large ring is inserted into the cap opening rib of the head cap with an interference fit, and the outer diameter of the lower cap opening ring is sealed against the cap opening rib of the head cap. The outer diameter of the lower ring groove of the upper spring plug of the inner plug is tilted outward and extends outward, and is sealed against the inner diameter of the head cap; the outer diameter of the rod hole of the lower sleeve rod of the inner plug is tilted outward and extends outward, and is sealed against the inner wall of the sleeve rod groove of the large ring; the spray hole of the head cap is located on the side above the outer tilted extension of the outer diameter of the lower ring groove. The inner diameter of the groove of the lower ring groove of the inner plug is provided with an inner pouring spout lower than the groove, and the inner pouring spout is located above the outer diameter notch of the spring groove of the large ring; when the head cap is pressed, the inner pouring spout of the inner plug is limited to the outer diameter notch of the spring groove of the large ring. The inner wall of the lower sleeve rod of the inner plug is provided with three equidistantly distributed wall guide grooves, which correspond to the three through holes at the top of the inner plug.

[0025] The inner diameter of the bottom opening of the large ring is provided with a raised bottle mouth rib 406, which the large ring is fastened to the bottle mouth of the bottle body through the bottle mouth rib. The inner diameter of the bottle mouth rib of the large ring is provided with a raised inner bottle groove 407, which the large ring is fastened to the bottle mouth of the outer bottle body through the bottle mouth rib, and the large ring is fastened to the bottle mouth of the inner bottle body through the inner bottle groove.

[0026] During use, the straw hole of the large ring is inserted into the straw, and the large ring is simultaneously inserted into the bottle mouth fixed to the outer bottle body and the bottle mouth of the inner bottle body. The head cap is pressed, the inner plug moves downward, and the spring, cover plate and elastic sleeve of the inner plug are deformed. The lower sleeve groove of the inner plug is limited to the step rib of the large ring. At the same time, the inner pouring mouth of the inner plug is limited to the outer diameter notch of the spring groove of the large ring. The notch of the lower ring groove of the inner plug is deformed outward and sealed to the inner diameter of the head cap. The liquid passes through the wall guide groove of the inner plug and the deformation of the cover plate and the elastic sleeve of the inner plug, and is atomized and sprayed out of the spray hole of the head cap. The head cap is released, the inner plug moves upward, the spring, cover plate and elastic sleeve of the inner plug are reset, and gas enters the pump head from the outside, waiting for the next press of the head cap.

Claims

1. A small spray pump head, comprising a head cap (1), an inner plug (2), a spring (3) and a large ring (4), wherein a spray hole is provided on one side of the head cap, and the inner plug is arranged in the liquid outlet hole of the large ring; characterized in that The liquid outlet of the large circle (4) is a plunger hole (401), the plunger hole at the top of the large circle is connected to the straw hole (405) at the bottom, the outer diameter of the plunger hole of the large circle is provided with a sleeve rod groove (402) and a spring groove (403) in sequence, and the spring (3) is arranged in the spring groove of the large circle; the inner plug (2) is T-shaped, the top of the lower sleeve rod (201) of the inner plug is provided with an upper spring plug (202), and the lower sleeve rod of the inner plug is provided with a central column (20 11), the inner wall of the lower sleeve rod of the inner plug is provided with a wall guide groove (2012), and the wall guide groove is communicated with the through hole (203) at the top of the inner plug; the central column of the inner plug is inserted into the plunger hole of the large circle, and the lower sleeve rod of the inner plug is inserted into the sleeve rod groove of the large circle, one end of the spring is against the bottom of the spring groove of the large circle, and the other end of the spring is against the lower ring groove (2021) at the bottom of the upper spring plug of the inner plug; the outer diameter of the lower ring groove of the inner plug is an elastic sleeve, and the lower ring groove of the inner plug is The notch at the ring groove and the outer notch of the spring groove of the large circle are against each other to form a spring cavity, and the spring is sealed in the spring cavity. The top of the upper spring plug of the inner plug is provided with an upper cover groove (2022), and the upper cover groove of the inner plug is provided with an upwardly protruding cover plate (5), and the through hole of the inner plug is located in the cover plate; the head cap (1) is pressed, the inner plug moves downward, the spring, the cover plate and the elastic sleeve of the inner plug are deformed, the through hole of the inner plug is sealed by the cover plate, the liquid passes through the wall guide groove of the inner plug, and after the cover plate and the elastic sleeve of the inner plug are deformed, it is atomized and sprayed out of the spray hole of the head cap, and the inner diameter of the head cap and the outer diameter of the notch at the spring groove of the large circle are kept sealed; the head cap is loosened, the inner plug moves upward, the spring, the cover plate and the elastic sleeve of the inner plug are reset, the cover plate at the through hole of the inner plug is opened, and the gas passes through the inner diameter of the head cap and the gap between the large circle and the inner plug, or the spray hole of the head cap, and the wall guide groove of the inner plug, and enters the large circle.

2. The small spray pump head according to claim 1, characterized in that The edge of the cover plate (5) is provided with a downwardly protruding sealing skirt (501), or the outer diameter of the sealing skirt is upwardly curved to fit the inner diameter bevel of the upper cover groove (2022) at the top of the inner plug (2), and the sealing skirt of the cover plate is pressed against and sealed against the through hole (203) in the upper cover groove at the top of the inner plug.

3. The small spray pump head according to claim 2, characterized in that A raised positioning pin (502) or positioning rib is provided in the middle of the top of the cover plate (5), and the positioning pin or positioning rib is inserted into a corresponding groove in the top of the head cap (1).

4. The small spray pump head according to claim 1, characterized in that A raised step rib (4011) is provided at the chamfered outer diameter of the plunger hole (401) at the bottom of the sleeve rod groove (402) of the large circle (4), and a lower sleeve groove (2013) is provided at the bottom of the lower sleeve rod (201) of the inner plug (2) corresponding to the step rib. When the head cap (1) is pressed, the lower sleeve groove of the inner plug is limited to the step rib of the large circle, and the notch at the lower ring groove of the inner plug is transformed into an outer shape and sealed to the inner diameter of the head cap.

5. The small spray pump head according to claim 1, characterized in that The bottom cap opening of the head cap (1) is provided with an inwardly protruding cap opening rib (101), and the outer diameter of the large circle (4) inside the head cap above the cap opening rib is provided with a protruding notch ring (404), the notch ring of the large circle is interference fit into the cap opening rib of the head cap, and the outer diameter below the cap opening ring is sealed against the cap opening rib of the head cap.

6. The small spray pump head according to claim 1, characterized in that The outer diameter of the notch of the lower ring groove (2021) at the upper spring plug (202) of the inner plug (2) is tilted outward and is sealed against the inner diameter of the head cap (1); the outer diameter of the rod hole at the lower sleeve rod (201) of the inner plug is tilted outward and is sealed against the inner wall of the sleeve rod groove (402) of the large ring (4); the spray hole of the head cap is located on the side above the outer diameter of the notch of the lower ring groove that is tilted outward.

7. The small spray pump head according to claim 6, characterized in that The inner diameter of the notch at the lower ring groove (2021) of the inner plug (2) is provided with an inner pouring mouth lower than the notch, and the inner pouring mouth is located above the outer diameter notch of the spring groove (403) of the large circle (4); when the head cap (1) is pressed, the inner pouring mouth of the inner plug is limited to abut against the outer diameter notch of the spring groove of the large circle.

8. The small spray pump head according to claim 1, characterized in that The inner wall of the lower sleeve rod (201) of the inner plug (2) is provided with three equally spaced wall guide grooves (2012), which correspond to the three through holes (203) on the top of the inner plug.

9. The small spray pump head according to claim 1, characterized in that The inner diameter of the bottom opening of the large ring (4) is provided with a raised bottle opening rib (406) or an inner thread of the ring opening, and the large ring is fastened to the bottle opening of the bottle body through the bottle opening rib, or the large ring is rotatably fixed to the outer thread of the bottle opening of the bottle body through the inner thread of the ring opening.

10. The small spray pump head according to claim 9, characterized in that The inner diameter of the bottle mouth rib (406) of the large ring (4) is provided with a raised inner bottle groove (407). The large ring is fastened to the bottle mouth of the outer bottle body through the bottle mouth rib, and is fixed to the bottle mouth of the inner bottle body through the inner bottle groove.

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