All-plastic rotary switch head cap self-locking pump head

Abstract

The utility model relates to a full-plastic rotary switch head cap self-locking pump head, which aims to solve the problems of inconvenient assembly and fitting between the large ring and the shoulder sleeve of the present similar products, inconvenient head cap self-locking and unlocking operation, and lack of sound prompt for self-locking and unlocking. The inner thread of the pump head large ring is connected with the outer thread of the bottle body, and the connecting part is provided with a pump core. The outer diameter of the large ring is sleeved with the shoulder sleeve. The key point is that the center hole of the large ring is upwardly protruded and arranged in the middle of the inner sleeve, the outer side is provided with a raised outer sleeve. The annular head cap groove downwardly protruded in the shoulder sleeve is sleeved into the annular groove between the inner sleeve and the outer sleeve of the top of the large ring. Meanwhile, the outer diameter cover with the opening of the head cap groove on the shoulder sleeve outwardly downward is sleeved with the outer sleeve of the large ring, and the cap mouth at the bottom of the head cap is inserted into the head cap groove at the top of the shoulder sleeve. The head cap is sleeved with the large ring and connected as a whole. The rotating rib of the shoulder sleeve is slid to one side and fitted in the rotating groove of the large ring. Meanwhile, the shoulder sleeve is fixed on the corresponding protruding rib of the large ring through the interference fit between the locking ribs on one side of the shoulder sleeve and emits sound.

Description

Technical Field

[0001] This utility model relates to a vacuum bottle and is a self-locking pump head with an all-plastic rotary switch cap. Background Technology

[0002] A vacuum bottle is a container that isolates gas from external temperature or external bacteria. Commercially available vacuum bottles typically consist of a cylindrical or elliptical container with a piston at the bottom. Some existing vacuum bottles or emulsion bottles feature a self-locking design, such as application number 201821735378.6 disclosed in Chinese patent literature, authorized on July 23, 2019, entitled "A Self-Locking Emulsion Pump"; and application number 202322905679.6 disclosed in Chinese patent literature, authorized on July 2, 2024, entitled "Replaceable Deformable Rotary Vacuum Bottle." However, the fitting of the large ring and shoulder sleeve in these products and similar products is inconvenient, the self-locking and unlocking operation of the cap is also inconvenient, and there is a lack of audible prompts for self-locking and unlocking. Summary of the Invention

[0003] To overcome the above shortcomings, the purpose of this utility model is to provide a self-locking pump head with an all-plastic rotary switch cap, thereby solving the technical problems of existing similar products where the fitting between the large ring and shoulder sleeve is convenient and reasonable, the self-locking and unlocking operation of the cap is inconvenient, and there is a lack of audible prompts for self-locking and unlocking. This objective is achieved through the following technical solution.

[0004] A self-locking pump head with an all-plastic rotary switch cap includes a cap, a shoulder sleeve, a large ring, and a pump core. The internal thread of the central hole at the bottom of the large ring is connected to the external thread of the bottle opening at the top of the bottle. The pump core is located in the central hole in the middle of the large ring at the connection point. The shoulder sleeve is fitted on the outer diameter of the large ring. The liquid inlet of the cap is fitted and connected to the liquid outlet at the valve stem of the pump core extending out of the large ring and the shoulder sleeve. The key structural design features are that the central hole of the large ring protrudes upward and is located in the middle of the inner sleeve. The outer diameter of the large ring outside the inner sleeve has an upward protruding outer sleeve with a height lower than that of the inner sleeve. The annular cap groove protruding downward inside the shoulder sleeve fits into the annular groove between the inner sleeve and the outer sleeve at the top of the large ring. At the same time, the outer diameter cover with the downward opening on the outer side of the cap groove on the shoulder sleeve fits into the outer diameter of the outer sleeve of the large ring. The cap opening at the bottom of the cap is inserted into the cap groove at the top of the shoulder sleeve.

[0005] The headgear and the large ring are integrated as one unit. The outer diameter of the large ring has equidistant rotating grooves with openings at the top edge. Each end of one rotating groove on one side of the large ring has a raised rib. Corresponding to the outer diameter of the shoulder sleeve, the rotating groove of the large ring has a raised rotating rib on one side of the bottom inner wall. The raised rib of the large ring has two symmetrically arranged locking ribs on the bottom inner wall of the shoulder sleeve, corresponding to the outer diameter of the shoulder sleeve. As the rotating rib of the shoulder sleeve slides to one side against the rotating groove of the large ring, the gap between the locking ribs on one side of the shoulder sleeve is interference-locked and fixed to the raised rib on the corresponding side of the large ring, producing a sound. This structure facilitates the rotation of the large ring by rotating the headgear, thus achieving self-locking.

[0006] The inner sleeve of the large ring has two symmetrically arranged guide openings. The inner wall of the bottom of the cap corresponding to the guide opening has a raised guide rib. The guide rib of the cap is inserted into the inner sleeve of the guide opening of the large ring and connected as a whole. The above structure is a specific embodiment of the cap and the large ring being connected as a whole. It can also be achieved by directional matching of an opening and a rib.

[0007] The ribs at both ends of the rotating groove of the large ring are set at a 45-degree angle with the center hole of the large ring as the center.

[0008] The inner opening of the headgear groove at the top of the shoulder cover is higher than the outer opening, and it is provided with two symmetrically arranged deformation openings.

[0009] The inner sleeve of the large ring has equidistantly spaced snap ribs at its bottom outer diameter. The corresponding shoulder sleeve has a snap groove at the bottom of its inner diameter of the cap groove. When the shoulder sleeve and large ring are fitted together, the snap ribs of the large ring engage with the snap grooves of the shoulder sleeve. This structure facilitates a more stable fit between the large ring and the shoulder sleeve.

[0010] The bottom of the annular groove between the inner and outer sleeves below the buckle rib of the large ring has through holes. This structure facilitates a stable airtight fit between the large ring and the shoulder sleeve.

[0011] The pump core is an all-plastic pump core, comprising a pump body, valve stem, valve needle, piston, inner plug, spring sleeve, and plastic spring. The pump port at the top of the pump body is sealed to the inner plug. The piston inside the pump body is fixed at the connection point between the valve needle and valve stem, with the outer diameter of the piston abutting against the inner wall of the pump body. A spring sleeve is provided at the water inlet of the pump body below the valve needle and piston. A plastic spring is provided on the outer diameter of the valve stem extending from the pump body and inner plug. One end of the plastic spring abuts against the bottom of the flange of the outer diameter of the liquid outlet at the top of the valve stem, and the other end abuts against the top ring surface of the inner plug. The plastic spring is a corrugated tube. The above is a structural embodiment of an all-plastic pump core, but other existing pump core structures can also be used.

[0012] The bottle body has a notch in the middle of the lug on the bottom side of the external thread, and a protruding spring block is provided on the bottom side of the internal thread of the large circle corresponding to the notch; when the external thread of the bottle body and the internal thread of the large circle are rotated into place, the notch of the bottle body engages with the spring block of the large circle and makes a sound.

[0013] This utility model has a reasonable structural design, is easy to assemble and use, and has good sealing and stability; it is suitable for use as a self-locking pump head with an all-plastic rotary switch cap, and is an improvement on the structure of similar products. Attached Figure Description

[0014] Figure 1 This is an exploded structural diagram of the present invention.

[0015] Figure 2 yes Figure 1 A schematic diagram of the internal structure of the headgear.

[0016] Figure 3 yes Figure 1 A schematic diagram of the bottom structure of the shoulder cover.

[0017] Figure 4 yes Figure 1 A schematic diagram of the top structure of the shoulder cover.

[0018] Figure 5 yes Figure 1 A schematic diagram of the top structure of the large circle.

[0019] Figure 6 yes Figure 1 A schematic diagram of the bottom structure of the large circle.

[0020] Figure 7 yes Figure 1 A schematic diagram of the assembled three-dimensional structure.

[0021] Figure 8 yes Figure 7 A cross-sectional structural diagram.

[0022] Figure 9 yes Figure 7 A cross-sectional view of the convex rib of the large circle in the open state, with part A framed in the figure.

[0023] Figure 10 yes Figure 9 Enlarged view of part A.

[0024] Figure 11 yes Figure 7 The diagram shows a cross-sectional view of the convex rib of the large circle in the closed state, with part B outlined in the diagram.

[0025] Figure 12 yes Figure 11 Enlarged view of part B.

[0026] Attached Figures and Their Names: 1. Head Cap, 101. Guide Rib, 2. Shoulder Cover, 201. Rotating Rib, 202. Locking Rib, 203. Snap-on Groove, 204. Deformation Opening, 3. Large Ring, 301. Center Hole, 302. Rotating Groove, 303. Snap-on Rib, 304. Guide Opening, 305. Raised Rib, 306. Internal Thread, 307. Spring Block, 308. Through Hole, 4. Pump Core, 5. Bottle Body, 501. External Thread, 502. Notch. Detailed Implementation

[0027] The structure of this utility model will now be further described with reference to the accompanying drawings. For example... Figures 1-12 As shown, the pump head includes a cap 1, a shoulder sleeve 2, a large ring 3, and a pump core 4. The internal thread 306 of the central hole 301 at the bottom of the large ring is connected to the external thread 501 of the bottle opening at the top of the bottle body 5. The pump core is located in the central hole in the middle of the large ring at the connection point. The shoulder sleeve is fitted on the outer diameter of the large ring. The liquid inlet of the cap is fitted and connected to the liquid outlet at the valve stem of the pump core extending out of the large ring and the shoulder sleeve. The central hole of the large ring protrudes upward and is located in the middle of the inner sleeve. The outer diameter of the large ring outside the inner sleeve has an upward protruding outer sleeve with a height lower than that of the inner sleeve. The downward protruding annular cap groove inside the shoulder sleeve fits into the annular groove between the inner sleeve and the outer sleeve at the top of the large ring. At the same time, the outer diameter cover with the downward opening on the outer side of the cap groove on the shoulder sleeve fits into the outer diameter of the outer sleeve of the large ring. The cap opening at the bottom of the cap is inserted into the cap groove at the top of the shoulder sleeve. Meanwhile, the inner sleeve of the large ring has two symmetrically arranged guide openings 304, and the inner wall of the bottom of the cap corresponding to the guide opening has a raised guide rib 101. The guide rib of the cap is inserted into the inner sleeve of the guide opening of the large ring and connected as a whole. The outer sleeve of the large ring has rotating grooves 302 with openings at the top edge at equal intervals on the outer diameter. The two ends of the rotating groove on one side of the large ring have raised ribs 305. The raised ribs at both ends of the rotating groove of the large ring are arranged at a 45-degree angle with the center hole of the large ring as the center. The rotating groove of the large ring has a raised rotating rib 201 on one side of the inner wall of the bottom of the outer diameter cover of the shoulder sleeve. The raised rib of the large ring has two symmetrically arranged locking ribs 202 on the inner wall of the bottom of the outer diameter cover of the shoulder sleeve. When the rotating rib of the shoulder sleeve slides to one side against the rotating groove of the large ring, the gap between the locking ribs on one side of the shoulder sleeve is interference-fitted and fixed to the raised rib on the corresponding side of the large ring and makes a sound.

[0028] The inner opening of the cap groove at the top of the shoulder sleeve is higher than the outer opening, and has two symmetrically arranged deformation openings 204. The bottom of the outer diameter of the inner sleeve of the large ring has equidistantly arranged snap ribs 303, and the bottom opening of the inner hole of the cap groove on the shoulder sleeve corresponding to the snap ribs has a snap groove 203; when the shoulder sleeve and the large ring are fitted together, the snap ribs of the large ring engage with the snap grooves of the shoulder sleeve; the bottom of the annular groove between the inner and outer sleeves below the snap ribs of the large ring has through holes 308 respectively. A notch 502 is provided in the middle of the lug on one side of the bottom of the external thread of the bottle body, and a raised spring block 307 is provided on one side of the bottom of the internal thread of the large ring corresponding to the notch; when the external thread of the bottle body and the internal thread of the large ring are rotated into place, the notch of the bottle body engages with the spring block of the large ring and makes a sound.

[0029] The aforementioned pump core is an all-plastic pump core, which includes a pump body, valve stem, valve needle, piston, inner plug, spring sleeve, and plastic spring. The pump port at the top of the pump body is sealed with the inner plug. The piston inside the pump body is fixed at the connection between the valve needle and the valve stem. The outer diameter of the piston abuts against the inner wall of the pump body. A spring sleeve is provided at the water inlet of the pump body below the valve needle and piston. A plastic spring is provided on the outer diameter of the valve stem extending out of the pump body and the inner plug. One end of the plastic spring abuts against the bottom of the flange of the outer diameter of the liquid outlet at the top of the valve stem, and the other end of the plastic spring abuts against the top ring surface of the inner plug. The plastic spring is a corrugated tube.

[0030] The main features of this pump head are as follows: 1. The pump head uses an all-plastic pump core; 2. The inner plug of the pump core 4 is assembled into the center hole 301 of the large ring 3 at the connection point with the pump body; 3. The shoulder sleeve 2 is guided by the rotating rib 201 and inserted into the rotating groove 302 of the large ring 3. When the snap rib 303 of the large ring 3 is engaged with the snap groove 203 of the shoulder sleeve 2, the assembly of the large ring 3 and the shoulder sleeve 2 is completed; the locking rib 202 of the shoulder sleeve 2 completes the left and right rotation action at the protruding rib 305 of the large ring 3. 4. Rotate the large ring 3 counterclockwise until the inner hole of the buckle groove 203 of the shoulder sleeve 2 aligns with the outer diameter of the guide opening 304 of the large ring 3. At the same time, the locking rib 202 of the shoulder sleeve 2 engages with the protruding rib 305 of the large ring 3 and makes a sound. Then, align the liquid inlet of the cap 1 with the liquid outlet of the valve stem of the pump core 2 and fit them together. Finally, align the guide rib 101 of the cap 1 with the guide opening 304 of the large ring 3 and press it all the way down. 5. Turn the external thread 501 of the bottle body 5 clockwise into the internal thread 306 of the large ring 3. When the notch 502 of the bottle body 5 engages with the spring block 307 of the large ring 3 and makes a sound, the assembly of the large ring 3 and the bottle body 5 is complete. 6. After assembly, the product is in a locked state. Rotate the shoulder sleeve 2 counterclockwise until you hear a sound, which means the pump head is now in the open state.

[0031] In summary, such as Figures 9-12 As shown, after rotating the shoulder sleeve to the right (counterclockwise) about 45 degrees, the cap is in the open position and can be pressed down; after rotating it to the left (clockwise) 45 degrees, the cap is in the locked position and cannot be pressed down. A crisp locking sound is heard during both rotation and closing, enhancing the user experience. The inability to press down the cap when closed perfectly solves the problem of accidental liquid leakage.

Claims

1. A self-locking pump head with an all-plastic rotary switch cap, the pump head comprising a cap (1), a shoulder sleeve (2), a large ring (3), and a pump core (4), wherein the internal thread (306) of the center hole (301) at the bottom of the large ring is connected to the external thread (501) at the top of the bottle body (5), the pump core is provided in the center hole in the middle of the large ring at the connection point, the shoulder sleeve is fitted on the outer diameter of the large ring, and the liquid inlet of the cap is fitted and connected to the liquid outlet of the pump core at the valve stem extending out of the large ring and the shoulder sleeve; characterized in that The center hole (301) of the large ring (3) protrudes upward and is located in the middle of the inner sleeve. The outer diameter of the large ring outside the inner sleeve is provided with an outer sleeve that protrudes upward and is lower than the height of the inner sleeve. The annular head cap groove protruding downward inside the shoulder sleeve (2) fits into the annular groove between the inner sleeve and the outer sleeve at the top of the large ring. At the same time, the outer diameter cover with the downward opening on the outer side of the head cap groove on the shoulder sleeve fits into the outer diameter of the outer sleeve of the large ring. The cap opening at the bottom of the head cap (1) is inserted into the head cap groove at the top of the shoulder sleeve.

2. The all-plastic rotary switch cap self-locking pump head according to claim 1, characterized in that... The headgear (1) and the large ring (3) are connected as one piece. The outer diameter of the outer ring is provided with rotating grooves (302) with openings at the top edge at equal intervals. The two ends of the rotating groove on one side of the large ring are respectively provided with ribs (305). The rotating groove of the large ring is provided with a raised rotating rib (201) on one side of the bottom inner wall of the outer diameter cover of the shoulder sleeve (2). The rib of the large ring is provided with two symmetrically arranged locking ribs (202) on the bottom inner wall of the outer diameter cover of the shoulder sleeve. When the rotating rib of the shoulder sleeve slides to one side while fitting against the rotating groove of the large ring, the gap between the locking ribs on one side of the shoulder sleeve is interference-fitted and fixed to the rib on the corresponding side of the large ring and makes a sound.

3. The all-plastic rotary switch cap self-locking pump head according to claim 2, characterized in that... The inner sleeve of the large ring (3) is provided with two symmetrically arranged guide openings (304), and the inner wall of the bottom of the head cap (1) corresponding to the guide opening is provided with a protruding guide rib (101). The guide rib of the head cap is inserted into the inner sleeve of the guide opening of the large ring and connected as one.

4. The all-plastic rotary switch cap self-locking pump head according to claim 2, characterized in that... The two protruding ribs (305) at both ends of the rotating groove (302) of the large ring (3) are set at a 45-degree angle with the center hole (301) of the large ring as the center.

5. The all-plastic rotary switch cap self-locking pump head according to claim 1, characterized in that... The inner opening of the headgear groove at the top of the shoulder sleeve (2) is higher than the outer opening, and has two symmetrically arranged deformation openings (204).

6. The all-plastic rotary switch cap self-locking pump head according to claim 1, characterized in that... The inner sleeve of the large ring (3) has equidistantly arranged buckle ribs (303) at the bottom of the outer diameter, and the shoulder sleeve (2) corresponding to the buckle ribs has a buckle groove (203) at the bottom of the inner hole of the head hat groove; when the shoulder sleeve and the large ring are fitted together, the buckle ribs of the large ring are engaged with the buckle groove of the shoulder sleeve.

7. The all-plastic rotary switch cap self-locking pump head according to claim 6, characterized in that... The bottom of the annular groove between the inner sleeve and the outer sleeve below the buckle rib (303) of the large ring (3) is provided with through holes (308).

8. The all-plastic rotary switch cap self-locking pump head according to claim 1, characterized in that... The pump core (4) is an all-plastic pump core, which includes a pump body, valve stem, valve needle, piston, inner plug, spring sleeve and plastic spring. The pump port at the top of the pump body is fastened and sealed with the inner plug. The piston inside the pump body is fixed at the connection between the valve needle and the valve stem. The outer diameter of the piston abuts against the inner wall of the pump body. A spring sleeve is provided at the water inlet of the pump body below the valve needle and the piston. A plastic spring is provided on the outer diameter of the valve stem that extends out of the pump body and the inner plug. One end of the plastic spring abuts against the bottom of the flange of the outer diameter of the liquid outlet at the top of the valve stem. The other end of the plastic spring abuts against the top ring surface of the inner plug. The plastic spring is a corrugated tube.

9. The all-plastic rotary switch cap self-locking pump head according to claim 1, characterized in that... The bottle body (5) has a notch (502) in the middle of the lug on the bottom side of the external thread (501) and a protruding spring block (307) on the bottom side of the internal thread (306) of the large circle (3) corresponding to the notch. When the external thread of the bottle body and the internal thread of the large circle are rotated into place, the notch of the bottle body engages with the spring block of the large circle and makes a sound.

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