Quick plug connector for water pipe

Abstract

The utility model discloses a water pipe quick connector which comprises a locking sleeve and a connecting sleeve, the locking sleeve is connected with the connecting sleeve in a matched mode, the locking sleeve can rotate relative to the connecting sleeve, a first through hole is formed in the locking sleeve, a second through hole is formed in the connecting sleeve, and the locking sleeve is provided with a buckling part. The connecting sleeve is provided with a clamping groove matched with the buckling part from bottom to top, the clamping groove extends in the circumferential direction of the connecting sleeve, the clamping groove enables the buckling part to have a rotatable space, the connecting sleeve is provided with a plurality of elastic clamping pieces, the elastic clamping pieces are arranged in the circumferential direction of the connecting sleeve, and a gap is formed between every two adjacent elastic clamping pieces. The inner wall of the first through hole is provided with a closing-in section, the inner diameter of the closing-in section is sequentially decreased from bottom to top, the elastic clamping pieces abut against the inner wall of the first through hole, all the elastic clamping pieces are matched to form a tightening ring internally, and when the tightening ring is not locked, the diameter of the tightening ring is large, and the tightening ring can be quickly inserted into a water pipe; after locking, the diameter of the tightening ring is reduced, and locking is achieved.

Description

Technical Field

[0001] This utility model relates to the field of quick-connect fittings, and in particular to a quick-connect fitting for water pipes. Background Technology

[0002] In daily use, connectors are often needed to connect faucets, water pipes, or water guns. Traditional connectors mostly rely on threaded or flanged structures. While these connections are secure, they require manual alignment and tightening with tools during installation. This process is not only cumbersome but also time-consuming and labor-intensive, causing inconvenience to users. Therefore, quick-connect connectors have emerged to improve installation efficiency. For example, some quick-connect connectors use the elastic deformation of a retaining spring to achieve a locking function. When a water pipe is inserted, the retaining spring expands outward due to elastic deformation to accommodate the pipe. Once the pipe is in place, the retaining spring springs back into a pre-set groove, completing the connection. Although these quick-connect connectors simplify the installation process to some extent, their reliability is highly dependent on the elasticity of the material. After long-term use, the retaining spring fatigues, leading to weakened elasticity and potentially affecting the normal use of the connector. Furthermore, during the insertion of the water pipe, the elastic resistance of the retaining spring still results in significant resistance during operation. Therefore, improvements are necessary. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings and deficiencies of existing technologies by providing a quick-connect fitting for water pipes. This fitting features a simple and reasonable structure and is easy to operate. An elastic locking element is installed inside the connecting sleeve. All the elastic locking elements work together to form a tightening ring. When not locked, the diameter of the tightening ring is relatively large, facilitating quick insertion of the water pipe. When locked, rotating the locking sleeve causes it to move downwards, and the elastic locking elements of the connecting sleeve slide upwards along the inner wall of the constriction section. Because the inner diameter of the constriction section decreases sequentially from bottom to top, the diameter of the tightening ring becomes smaller, thus achieving a quick-locking function.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a quick-connect fitting for water pipes, comprising a locking sleeve and a connecting sleeve. The locking sleeve and the connecting sleeve are connected and the locking sleeve is rotatable relative to the connecting sleeve. The locking sleeve has a first through hole at its center, and the connecting sleeve has a second through hole at its center. The locking sleeve extends downwards with a plurality of snap-fit ​​portions arranged along the circumference of the locking sleeve. The connecting sleeve has grooves extending from bottom to top that correspond to the snap-fit ​​portions and extend along the circumference of the connecting sleeve, allowing the snap-fit ​​portions to have rotatable space. The connecting sleeve extends upwards with a plurality of elastic snap-fit ​​elements arranged along the circumference of the connecting sleeve. Adjacent elastic snap-fit ​​elements are arranged in a circumferential manner. A gap is formed between the components. The upper inner wall of the first through hole is provided with a constricted section. The inner diameter of the constricted section decreases from bottom to top. The outer wall of the elastic snap-fit ​​component abuts against the inner wall of the first through hole. The locking sleeve can rotate between a first position and a second position. The depth of the slot in the first position is greater than the depth in the second position. When the locking sleeve is in the first position, the elastic snap-fit ​​component is located below the constricted section. All the elastic snap-fit ​​components cooperate to form a tightening ring with a larger diameter inside. When the locking sleeve rotates from the first position to the second position, the change in the depth of the slot causes the locking sleeve to move downward. The elastic snap-fit ​​component slides upward along the inner wall of the constricted section. All the elastic snap-fit ​​components cooperate to form a tightening ring with a smaller diameter inside.

[0006] Furthermore, the card slot includes a first slot and a second slot, and a transition slope is provided at the transition between the first slot and the second slot. The depth of the first slot is greater than the depth of the second slot.

[0007] Furthermore, the upper end face of the locking sleeve is provided with a plurality of ratchet teeth along the circumferential direction, and the ratchet teeth are arranged at an angle.

[0008] Furthermore, the lower end of the buckle is provided with an upwardly protruding hook, and the slot engages with the hook.

[0009] Furthermore, the upper end of the elastic snap-fit ​​member is provided with an abutment portion, and all abutment portions cooperate with the interior to form the tightening ring.

[0010] Furthermore, the outer wall of the abutting part is provided with a conical surface that matches the inner wall of the closing section.

[0011] Furthermore, the inner wall of the abutment portion is provided with several locking teeth.

[0012] Furthermore, the locking sleeve also includes a first annular portion, the first annular portion extending downwards is provided with the buckling portion, and the upper end surface of the first annular portion is provided with a plurality of ratchet teeth.

[0013] Furthermore, the connecting sleeve also includes a second annular portion, on which the elastic snap-fit ​​member extends upward.

[0014] Furthermore, the first through hole and the second through hole are coaxially arranged.

[0015] The beneficial effects of this utility model are as follows: The quick-connect fitting for water pipes described in this utility model includes a locking sleeve and a connecting sleeve. The locking sleeve can rotate between a first position and a second position. In the unlocked state, the locking sleeve is located in the first position. At this time, the hook of the locking sleeve's snap-fit ​​part is located in the first groove of the connecting sleeve. The locking sleeve moves upward under the elastic force of the elastic snap-fit ​​part of the connecting sleeve. At this time, the elastic snap-fit ​​part is located below the constriction section. Since the inner diameter of the constriction section decreases from bottom to top, the gap between the abutting parts on two adjacent elastic snap-fit ​​parts of the connecting sleeve is larger in this position. All abutting parts cooperate to form a tightening ring with a larger diameter, allowing the water pipe to be easily inserted into the tightening ring, which is convenient for installation and adjustment. When tightening is required, the operator rotates the locking sleeve around the central axis of the locking sleeve, causing the locking sleeve to rotate from the first position to the second position, and causing the hook of the snap-fit ​​part to pass through the first groove. After rotating through the transition slope into the second groove, since the depth of the first groove is greater than that of the second groove (note that this depth refers to the vertical distance of the groove from bottom to top on the connecting sleeve), the change in groove depth during rotation causes the locking sleeve to move downwards. At this time, the elastic snap-fit ​​component slides upwards along the inner wall of the constriction section. Since the inner diameter of the constriction section decreases sequentially from bottom to top, this decreasing design guides the elastic snap-fit ​​component to deform inwards, gradually reducing the gap between two adjacent abutment parts. After the locking sleeve rotates to the second position, all abutment parts cooperate to form a tightening ring with a smaller diameter, which can effectively hold the water pipe and play a locking role, ensuring the stability of the water pipe at the connection. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the present invention from a first-view perspective;

[0017] Figure 2 This is a schematic diagram of the structure when the locking sleeve and the connecting sleeve are separated;

[0018] Figure 3 This is a schematic diagram of the locking sleeve structure;

[0019] Figure 4 This is a structural schematic diagram of the connecting sleeve from a second perspective;

[0020] Figure 5 This is a structural schematic diagram of the connecting sleeve from a third-person perspective;

[0021] Figure 6 This is a structural schematic diagram of the present invention from a fourth-person perspective;

[0022] Figure 7 yes Figure 6 A magnified structural diagram of point A in the middle.

[0023] Figures 1-7 In the middle: 1. Locking sleeve; 11. First through hole; 12. Rattle tooth; 13. First ring part; 14. Snap-on part; 141. Snap hook; 15. Closing section; 2. Connecting sleeve; 21. Second through hole; 22. Second ring part; 23. Snap groove; 231. First groove; 232. Second groove; 233. Transition slope; 24. Notch; 25. Elastic snap-fit ​​part; 251. Abutting part; 2511. Conical surface; 2512. Snap tooth; 26. Gap. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figures 1-7 The quick-connect fitting for water pipes shown includes a locking sleeve 1 and a connecting sleeve 2. (See attached image) Figure 1 and Figure 6 The locking sleeve 1 is connected to the connecting sleeve 2, and the locking sleeve 1 can rotate relative to the connecting sleeve 2. (See reference...) Figure 3 The locking sleeve 1 has a first through hole 11 at its center, see reference. Figure 4 The connecting sleeve 2 has a second through hole 21 at its center. The first through hole 11 and the second through hole 21 are coaxially arranged to facilitate the insertion of the water pipe. (See reference...) Figure 1 and Figure 2 The upper end face of the locking sleeve 1 is provided with a plurality of ratchet teeth 12 along the circumferential direction. Specifically, the ratchet teeth 12 are inclined to increase the friction of the upper end face of the locking sleeve 1 and prevent loosening. See reference. Figure 2 The lower end of the locking sleeve 1 extends downward and is provided with a plurality of latching portions 14, which are arranged along the circumference of the locking sleeve 1. (See reference...) Figures 5-6 The connecting sleeve 2 is provided with a plurality of slots 23 that correspond to and cooperate with the snap-fit ​​part 14. Specifically, the slots 23 are snapped together with the snap-fit ​​part 14. The lower end of the snap-fit ​​part 14 is provided with an upwardly protruding hook 141. The connecting sleeve 2 is provided with slots 23 from bottom to top that correspond to and cooperate with the hook 141. The hook 141 engages with the slots 23 to ensure a stable and reliable connection.

[0026] Specifically, the slot 23 extends along the circumferential direction of the connecting sleeve 2, and the slot 23 provides rotatable space for the latching part 14, allowing the locking sleeve 1 to rotate between a set first position and a second position. The depth of the slot 23 in the first position is greater than the depth in the second position. (See reference...) Figures 5-6The slot 23 includes a first slot 231 and a second slot 232. A transition slope 233 is provided at the transition between the first slot 231 and the second slot 232. Specifically, the depths of the first slot 231 and the second slot 232 are different, with the depth of the first slot 231 being greater than the depth of the second slot 232. It should be noted that in this embodiment, the depth refers to the vertical distance of the groove from bottom to top of the connecting sleeve 2. The transition slope 233 can prevent the buckle from being blocked or causing a jolt during rotation.

[0027] Preferably, see Figures 5-6 The connecting sleeve 2 is also provided with a notch 24 below the slot 23 that corresponds to the slot 23, which facilitates the processing of the first slot 231 and the second slot 232.

[0028] Preferably, in this embodiment, refer to Figure 2 and Figure 4 The upper end face of the connecting sleeve 2 is provided with a plurality of elastic snap-fit ​​members 25 extending upward. The plurality of elastic snap-fit ​​members 25 are evenly arranged along the circumferential direction of the connecting sleeve 2. The elastic snap-fit ​​members 25 are elastic and always have an outward expansion tendency. A gap 26 is formed between two adjacent elastic snap-fit ​​members 25, and the gap 26 allows the elastic snap-fit ​​members 25 to deform.

[0029] Preferably, in this embodiment, refer to Figures 2-3 The upper inner wall of the first through hole 11 is provided with a tapering section 15, the inner diameter of the tapering section 15 decreases from bottom to top, the elastic snap-fit ​​member 25 extends into the first through hole 11, the outer wall of the elastic snap-fit ​​member 25 abuts against the inner wall of the first through hole 11, and the tapering section 15 is used to guide the elastic snap-fit ​​member 25 to deform inward.

[0030] Specifically, see Figure 2 and Figure 4 The upper end of the elastic snap-fit ​​member 25 is provided with an abutment portion 251. All abutment portions 251 cooperate with the interior to form a tightening ring, so that the water pipe can be easily inserted into the tightening ring for easy installation and adjustment. The outer wall shape of the abutment portion 251 is adapted to the inner wall shape of the constriction section 15. Specifically, the outer wall of the abutment portion 251 is provided with a conical surface 2511 that cooperates with the inner wall of the constriction section 15. The inner wall of the abutment portion 251 is provided with a plurality of locking teeth 2512. By the locking teeth 2512 abutting against the outer wall of the water pipe, the friction between the abutment portion 251 and the water pipe can be increased to prevent loosening.

[0031] Preferably, in this embodiment, refer to Figure 2The locking sleeve 1 further includes a first annular portion 13, the first annular portion 13 extending downwards is provided with the buckle portion 14, and the upper end face of the first annular portion 13 is provided with a plurality of ratchet teeth 12. The connecting sleeve 2 further includes a second annular portion 22, the second annular portion 22 extending upwards is provided with the elastic snap-fit ​​member 25. The outer diameter of the first annular portion 13 is the same as the outer diameter of the second annular portion 22, making the product more aesthetically pleasing.

[0032] Specifically, the locking sleeve 1 can rotate between a set first position and a second position, and the hook 141 can rotate between the first groove 231 and the second groove 232. Since the depths of the first groove 231 and the second groove 232 are different, the locking sleeve 1 can move up and down relative to the connecting sleeve 2. When the locking sleeve 1 is in the first position, the axial distance between the first ring portion 13 and the second ring portion 22 is large. When the locking sleeve 1 is in the second position, the axial distance between the first ring portion 13 and the second ring portion 22 will decrease accordingly.

[0033] When the locking sleeve 1 moves down, the elastic snap-fit ​​25 slides upward along the inner wall of the constriction section 15. Since the inner diameter of the constriction section 15 decreases from bottom to top, this decreasing design is used to guide the elastic snap-fit ​​25 to deform inward, so that the gap 26 between two adjacent abutment parts 251 gradually shrinks, and the abutment parts 251 shrink towards the center of the second through hole 21, thereby making the diameter of the tightening ring smaller, so that the tightening ring can effectively hold the water pipe and play a locking role.

[0034] The working principle of this utility model is as follows: In the unlocked state, the locking sleeve 1 is located in the first position. At this time, the hook 141 of the buckle part 14 is located in the first groove 231. The locking sleeve 1 moves upward under the elastic force of the elastic snap-fit ​​member 25. The elastic snap-fit ​​member 25 is located below the constriction section 15. Since the inner diameter of the constriction section 15 decreases from bottom to top, in this position, the gap 26 between the abutment parts 251 on the two adjacent elastic snap-fit ​​members 25 of the connecting sleeve 2 is relatively large. All abutment parts 251 cooperate to form a tightening ring with a larger diameter, so that the water pipe can be easily inserted into the tightening ring, which is convenient for installation and adjustment. When locking is required, the operator rotates the locking sleeve 1 with the central axis of the locking sleeve 1 as the axis, so that the locking sleeve 1 rotates from the first position to the second position, and so that the hook 141 of the buckle part 14 rotates from the first groove 231 through the transition slope 233 to the second groove 232. The depth of the first groove 231 is deeper than the depth of the second groove 232. It should be noted that this depth refers to the vertical distance of the groove from bottom to top of the connecting sleeve 2. When the hook 141 rotates from the first groove 231 through the transition slope 233 into the second groove 232, the change in the depth of the groove 23 causes the locking sleeve 1 to move downward. At this time, the elastic snap-fit ​​25 slides upward along the inner wall of the constriction section 15. Since the inner diameter of the constriction section 15 decreases from bottom to top, this decreasing design is used to guide the elastic snap-fit ​​25 to deform inward, so that the gap 26 between two adjacent abutment parts 251 gradually decreases. After the locking sleeve 1 rotates to the second position, all abutment parts 251 cooperate to form a tightening ring with a smaller diameter, which can effectively hold the water pipe and play a locking role, ensuring the stability of the water pipe at the connection.

[0035] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A quick-connect fitting for water pipes, characterized in that: The device includes a locking sleeve (1) and a connecting sleeve (2). The locking sleeve (1) is connected to the connecting sleeve (2). The locking sleeve (1) can rotate relative to the connecting sleeve (2). The locking sleeve (1) has a first through hole (11) at its center, and the connecting sleeve (2) has a second through hole (21) at its center. The locking sleeve (1) extends downward and has several latching parts (14) arranged along the circumferential direction of the locking sleeve (1). The connecting sleeve (2) has slots (23) from bottom to top that correspond to the latching parts (14). The slots (23) extend along the circumferential direction of the connecting sleeve (2) and allow the latching parts (14) to have rotatable space. The connecting sleeve (2) extends upward and has several elastic snap-fit ​​pieces (25) arranged along the circumferential direction of the connecting sleeve (2). Two adjacent elastic snap-fit ​​pieces... A gap (26) is formed between (25). The upper inner wall of the first through hole (11) is provided with a constriction section (15). The inner diameter of the constriction section (15) decreases from bottom to top. The outer wall of the elastic snap-fit ​​(25) abuts against the inner wall of the first through hole (11). The locking sleeve (1) can rotate between the first position and the second position. The depth of the slot (23) in the first position is greater than the depth in the second position. When the locking sleeve (1) is in the first position, the elastic snap-fit ​​(25) is located below the constriction section (15). All the elastic snap-fit ​​(25) cooperate to form a tightening ring with a larger diameter inside. When the locking sleeve (1) rotates from the first position to the second position, the change in the depth of the slot (23) causes the locking sleeve (1) to move down. The elastic snap-fit ​​(25) slides upward along the inner wall of the constriction section (15). All the elastic snap-fit ​​(25) cooperate to form a tightening ring with a smaller diameter inside.

2. The quick-connect fitting for water pipes according to claim 1, characterized in that: The slot (23) includes a first slot (231) and a second slot (232). A transition slope (233) is provided at the transition between the first slot (231) and the second slot (232). The depth of the first slot (231) is greater than the depth of the second slot (232).

3. A quick-connect fitting for water pipes according to claim 1, characterized in that: The upper end face of the locking sleeve (1) is provided with a plurality of ratchet teeth (12) along the circumferential direction, and the ratchet teeth (12) are inclined.

4. A quick-connect fitting for water pipes according to claim 1, characterized in that: The lower end of the buckle part (14) is provided with an upward protruding hook (141), and the slot (23) engages with the hook (141).

5. A quick-connect fitting for water pipes according to claim 1, characterized in that: The upper end of the elastic snap-fit ​​member (25) is provided with an abutment part (251), and all abutment parts (251) cooperate with the interior to form the tightening ring.

6. A quick-connect fitting for water pipes according to claim 5, characterized in that: The outer wall of the abutting part (251) is provided with a conical surface (2511) that matches the inner wall of the closing section (15).

7. A quick-connect fitting for water pipes according to claim 5, characterized in that: The inner wall of the abutment part (251) is provided with a number of locking teeth (2512).

8. A quick-connect fitting for water pipes according to claim 3, characterized in that: The locking sleeve (1) also includes a first annular portion (13), the first annular portion (13) extends downward and is provided with the buckle portion (14), and the upper end surface of the first annular portion (13) is provided with a plurality of ratchet teeth (12).

9. A quick-connect fitting for water pipes according to claim 1, characterized in that: The connecting sleeve (2) also includes a second annular portion (22), on which the elastic snap-fit ​​member (25) extends upward.

10. A quick-connect fitting for water pipes according to claim 1, characterized in that: The first through hole (11) and the second through hole (21) are arranged coaxially.

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