Filter barrel with one-key double-self-locking structure

Abstract

A filter barrel with a one-key double-self-locking structure comprises a filter barrel, a filter element, a filter barrel inner cover and a filter barrel outer cover, the filter element is arranged in the filter barrel, the filter barrel inner cover and the filter barrel outer cover are sequentially buckled outside the filter barrel, the filter barrel inner cover comprises an end face and a peripheral wall inserted into the inner wall of the filter barrel, a protruding clamping strip is arranged on the peripheral wall, a clamping groove matched with the protruding clamping strip is formed in the inner wall of the filter barrel, and the clamping groove is matched with the protruding clamping strip. A sliding locking structure is arranged on the end face of the filter barrel inner cover and comprises a sliding groove, a sliding block and a push rod, the sliding groove is formed in the radial direction of the end face of the filter barrel inner cover, the sliding block moves along the sliding groove, the push rod is arranged on the surface of the sliding block, and a locking groove matched with the sliding block is formed in the top end of the filter barrel wall. A push rod clamping groove matched with the push rod is formed in the filter barrel outer cover.

Description

[Technical Field]

[0002] This utility model relates to the technical field of filter cartridges in water purifiers, and more particularly to a double self-locking structure achieved by a single button in the filter cartridge assembly structure. [Background Technology]

[0004] With the continuous improvement of living standards and the widespread use of household and commercial water treatment equipment, users' requirements for drinking water quality are increasing. Water purifiers and other water treatment equipment are frequently installed in many places, and the filter cartridge is the core component of a water purifier. The filter cartridge is placed inside the filter canister, which is a container for the filter cartridge. Currently, water purifier filter canisters are mainly of welded disposable structure and replaceable threaded sealing structure. However, with the increasing demand for environmental protection and convenience, disposable filter canisters no longer meet the requirements of environmental protection and cost. A common problem with detachable filter canisters is that after prolonged use, the seal is prone to loosening, leading to leakage. Therefore, there is an urgent need for a new type of filter canister sealing and locking structure design to improve its reliability.

[0005] Currently, in the assembly process of filter elements and filter cartridges, the filter element is often assembled into the filter cartridge first, the inner cover of the filter cartridge is then fastened, and the filter cartridge assembly is then installed onto the outer cover of the filter cartridge. This involves a three-in-one process that requires tightening and locking. The goal is to simplify the structure as much as possible to reduce costs while ensuring the reliability of the locking mechanism. [Summary of the Invention]

[0007] This utility model improves upon existing filter cartridge and filter element locking structures, ensuring both reliability and ease of use. By designing a locking structure that achieves pairwise locking between the three components through two separate actions, it ensures stable and reliable locking between the filter element and filter cartridge, as well as between the filter cartridge cover and the filter cartridge. The structure is simple, reliable, and easy for users to operate.

[0008] The filter cartridge with a one-button double self-locking structure involved in this utility model includes a filter cartridge, a filter element, an inner cover of the filter cartridge, and an outer cover of the filter cartridge. The filter element is installed inside the filter cartridge, and the inner cover and the outer cover of the filter cartridge are sequentially fastened to the outside of the filter cartridge. The inner cover of the filter cartridge includes an end face and a peripheral wall that is inserted into the inner wall of the filter cartridge. A raised locking strip is provided on the peripheral wall, and a groove adapted to the raised locking strip is provided on the inner wall of the filter cartridge. A sliding locking structure is provided on the end face of the inner cover of the filter cartridge. The sliding locking structure includes a sliding groove, a slider, and a push rod. The sliding groove is located in the radial direction of the end face of the inner cover of the filter cartridge. The slider moves along the sliding groove. A push rod is provided on the surface of the slider. A locking groove adapted to the slider is provided at the top of the filter cartridge wall. A push rod groove adapted to the push rod is provided on the outer cover of the filter cartridge.

[0009] The sliding locking structure includes a sliding groove, which is radially arranged along the inner cover of the filter bucket and extends through the outer edge of the inner cover of the filter bucket. There are guide grooves on both sides of the sliding groove, and the slider slides by embedding its two sides into the guide grooves. There are limiting members on both sides of the slider to limit the maximum range of movement of the slider relative to the sliding groove.

[0010] A locking groove is provided at the top of the filter barrel wall. The locking groove can be an open groove or a closed groove. When the inner cover of the filter barrel is tightened to the filter barrel, the slider of the sliding locking structure is positioned opposite the locking groove.

[0011] A limiting protrusion is provided on the outer periphery of the filter barrel cover, and a push rod groove is provided in the center of the limiting protrusion along the radial direction of the filter barrel cover.

[0012] With the filter barrel axis as the center, the distance between the push rod and the center when the slider moves to the innermost part of the groove is L1, the distance between the push rod and the center when the slider moves to the restricted position of the limiting part is L2, and the distance between the push rod and the center when the push rod is pushed into the push rod slot is L3. The maximum outer diameter of the limiting protrusion is R. The following relationships need to be satisfied: L2>R>L3, L2>L3>L1.

[0013] The length of the slider should meet the following constraints: when the slider moves to a distance L1 from the center of the circle, the edge of the slider does not extend beyond the outer edge of the inner cover of the filter bucket; and when the slider moves to a distance L3 from the center of the circle, the edge of the slider is locked in the locking groove. [Attached Image Description]

[0015] Figure 1 This is a schematic diagram of the overall structure of the filter bucket with a one-button double self-locking structure involved in this utility model;

[0016] Figure 2 The filter cartridge with a one-button double self-locking structure involved in this utility model Figure 1 Enlarged view of a portion of the image (A);

[0017] Figure 3 This utility model relates to the appendix Figure 2 A schematic diagram of the open state of the middle structure;

[0018] Figure 4 This is a schematic diagram of the mating structure of the filter barrel outer cover with the one-button double self-locking structure involved in this utility model;

[0019] Figure 5 This is a schematic diagram of multiple different positions in the one-button double self-locking structure involved in this utility model;

[0020] Among them: 10, filter barrel; 11, slot; 12, locking slot; 20, filter element; 30, inner cover of filter barrel; 31, end face; 32, peripheral wall; 33, raised retaining strip; 40, outer cover of filter barrel; 41, limiting protrusion seat; 42, push rod slot;

[0021] 50. Sliding locking structure; 51. Slide groove; 511. Guide slide groove; 52. Slider; 53. Push rod.

Detailed Implementation Methods

[0023] The present invention will now be described in detail with reference to the embodiments. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Please refer to the attached document. Figure 1 -Appendix Figure 3 The illustration shows a filter barrel with a one-button double self-locking structure, including a filter barrel 10, a filter element 20, an inner cover 30, and an outer cover 40. The filter element 20 is installed inside the filter barrel 10, and the inner cover 30 and the outer cover 40 are sequentially fastened to the outside of the filter barrel 10. Conventional products generally follow the procedure of installing the filter element 20 into the filter barrel 10 and tightening it, then covering it with the inner cover 30 to form a filter barrel assembly, and then installing the filter barrel assembly onto the outer cover 40 to form a circulating filtration water path.

[0026] The inner cover 30 of the filter bucket includes an end face 31 and a peripheral wall 32 that inserts into the inner wall of the filter bucket. Generally, a locking structure is designed on the inner peripheral wall 32 of the inner cover. The locking structure may have previously included a threaded structure, but now it generally adopts a locking structure with a raised locking strip and a locking groove. A raised locking strip 33 is provided on the peripheral wall 32 of the inner cover 30, and a locking groove 11 adapted to the raised locking strip 33 is provided on the inner wall of the filter bucket 10. A sliding locking structure 50 is provided on the end face of the inner cover 30. The sliding locking structure 50 includes a sliding groove 51, a slider 52, and a push rod 53. The sliding groove 51 is located in the radial direction of the end face of the inner cover 30. The slider 52 moves along the sliding groove 51. A push rod 53 is provided on the surface of the slider 52. A locking groove 12 adapted to the slider 52 is provided at the top of the filter bucket 10 wall. A push rod locking groove 42 adapted to the push rod is provided on the outer cover 40 of the filter bucket.

[0027] The sliding locking structure 50 guides the slider 52 through its sliding groove 51, while one end of the slider 52 engages with the locking groove 12 to lock the inner cover 30 and the filter barrel 10. The push rod 53, which engages with the push rod groove 42, limits the outer cover 40 and the inner cover 30 of the filter barrel. This achieves the locking of three structural parts with a single locking structure.

[0028] The sliding locking structure 50 includes a sliding groove 51, which is radially arranged along the inner cover 30 of the filter bucket and extends through the outer edge of the inner cover 30, i.e., the sliding groove 51 extends all the way to the outside, penetrating the edge of the inner cover 30 of the filter bucket. Guide grooves 511 are provided on both sides of the sliding groove 51, and the slider 52 slides by embedding its sides into the guide grooves 511. Limiting members are provided on both sides of the slider 52 to limit the maximum range of movement of the slider relative to the sliding groove.

[0029] The slide groove 51 is a groove structure that accommodates the slider 52 as a whole, allowing the slider 52 to slide within it. The guide grooves 511 on both sides of the slide groove are the parts that specifically hold the slider 52 in place, thus preventing the slider 52 from falling off.

[0030] At the top of the filter barrel 10 wall, a locking groove 12 is provided. This locking groove 12 can be an open groove or a closed groove. After the filter barrel inner cover 30 is tightened onto the filter barrel 10, the slider 52 of the sliding locking structure 50 is positioned opposite the locking groove 12. Since the filter barrel inner cover is assembled onto the filter barrel by screwing it on, and it is considered assembled when it is rotated to a preset position, at this time, the slider of the sliding locking structure 50 pushes the sliding plate to the position of the locking groove 12, which limits the rotational freedom of the filter barrel inner cover relative to the filter barrel, thus locking the two together.

[0031] Please refer to the attached document. Figure 4 A limiting protrusion 41 is also provided on the outer periphery of the filter barrel outer cover 40. The limiting protrusion 41 has a push rod groove 42 recessed inward along the radial direction of the filter barrel outer cover in its center. The limiting protrusion 41 is mainly for setting the push rod groove 42.

[0032] With the filter barrel 10 axis as the center, the distance between the push rod 53 and the center when the slider 52 moves to the innermost part of the slide groove is L1, the distance between the push rod 53 and the center when the slider 52 moves to the restricted position of the limiting member is L2, and the distance between the push rod 53 and the center when the push rod 53 is pushed to the push rod slot 42 is L3. The maximum outer diameter of the limiting protrusion seat 41 is R. The following relationship needs to be satisfied: L2>R>L3, L2>L3>L1.

[0033] The length of the slider 52 should simultaneously meet the following two conditions: when the slider 52 moves to a position L1 away from the center of the push rod, the edge of the slider 52 does not exceed the outer edge of the inner cover 30 of the filter bucket; when the push rod 53 is inserted into the push rod slot 42, the outer edge of the slider 52 is locked in the locking slot 12.

[0034] The limitation on the length of slider 52 is related to the function it needs to perform. When the distance between the push rod and the center is L1, the slider is actually retracted to its innermost position. At this time, slider 52 does not exceed the outer edge of the filter inner cover 30 and cannot hinder the inner cover 30 from rotating in or out of the filter. The sliding locking structure is in an unlocked state at this time. However, if the inner cover 30 is rotated into the filter and reaches the locked position, the push rod 53 pushes outward to its limit position, that is, when the limiting member reaches the restricted position, it can no longer be pushed outward. The distance between push rod 53 and the center is L2. At this point, L2 should not be greater than the maximum outer diameter R of the limiting protrusion 41 on the filter barrel outer cover 40. That is, the position of push rod 53 at this time does not obstruct the screwing in and out of the filter barrel outer cover 40. When the filter barrel outer cover 40 is screwed into the predetermined position, push rod slot 42 aligns with push rod 53, and push rod 53 is pushed inward. At this point, the distance between push rod 53 and the center is L3. At this time, push rod 53 is locked in push rod slot 42, limiting the circumferential freedom of filter barrel outer cover 40, while the outer edge of slider 52 is locked in locking groove 12. Thus, the filter barrel inner cover 30 and filter barrel 10 are locked simultaneously.

[0035] Referring to the attached diagram, it is clear that the sliding locking structure achieves the entire locking action through three key points: 1. When the slider moves to the innermost part of the slide groove (position L1), the entire slider retracts into the slide groove, not obstructing the rotation of the filter inner cover within the filter barrel; 2. When the filter inner cover rotates to its position, the push rod 53 drives the slider 52 to slide to the furthest position relative to the slide groove (distance L3), not obstructing the rotation of the filter barrel assembly onto the filter outer cover 40; at this time, the limiting protrusions 41 on the filter outer cover 40 can pass through the push rod 53; 3. When the filter outer cover rotates to the predetermined position, the push rod slot 42 aligns with the position of the push rod 53, pushing the push rod 53 into the push rod slot 42, while simultaneously, a portion of the slider remains locked within the locking groove 12. The entire slider first moves outward a maximum distance, then retracts inward a smaller distance.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A filter bucket with one key and double self-locking structure, comprising a filter bucket, a filter core, an inner cover of the filter bucket and an outer cover of the filter bucket, the filter core is arranged in the filter bucket, the inner cover of the filter bucket and the outer cover of the filter bucket are sequentially buckled outside the filter bucket, characterized in that, The inner cover of the filter bucket comprises an end face and a peripheral wall inserted into the inner wall of the filter bucket, a protruding clamping strip is arranged on the peripheral wall, a clamping groove matched with the protruding clamping strip is arranged on the inner wall of the filter bucket, a sliding locking structure is arranged on the end face of the inner cover of the filter bucket, the sliding locking structure comprises a sliding groove, a sliding block and a push rod, the sliding groove is arranged in the radial direction of the end face of the inner cover of the filter bucket, the sliding block moves along the sliding groove, the push rod is arranged on the surface of the sliding block, a locking groove matched with the sliding block is arranged at the top end of the filter bucket wall, and a push rod clamping groove matched with the push rod is arranged on the outer cover of the filter bucket.

2. The one-key double self-locking structure filter bucket according to claim 1, characterized in that, The sliding locking structure comprises a sliding groove, the sliding groove is arranged in the radial direction of the inner cover of the filter bucket and penetrates through the outer edge of the inner cover of the filter bucket, guide sliding grooves are arranged on both sides of the sliding groove, the sliding block is embedded into the guide sliding grooves on both sides to slide, and limiting members for limiting the maximum range of movement of the sliding block relative to the sliding groove are arranged on both sides of the sliding block.

3. The one-key double self-locking structure filter bucket according to claim 1, characterized in that, The locking groove is an open groove or a closed groove, and the sliding block of the sliding locking structure is opposite to the position of the locking groove when the inner cover of the filter bucket is screwed to the filter bucket.

4. The one-key double self-locking structure filter bucket according to claim 1, characterized in that, A limiting protrusion seat is further arranged on the outer periphery of the outer cover of the filter bucket, and a push rod clamping groove is arranged in the central part of the limiting protrusion seat and recessed in the radial direction of the outer cover of the filter bucket.

5. The one-key double self-locking structure filter bucket according to claim 1, characterized in that, The distance between the push rod and the center of the filter bucket when the sliding block moves to the innermost part of the sliding groove is L1, the distance between the push rod and the center of the filter bucket when the sliding block moves to the position limited by the limiting member is L2, and the distance between the push rod and the center of the filter bucket when the push rod pushes into the push rod clamping groove is L3, the maximum outer diameter of the limiting protrusion seat is R, and the above distance relationships need to satisfy the following relationships: L2>R>L3, L2>L3>L1.

6. The one-key double self-locking structure filter bucket according to claim 5, characterized in that, The length of the sliding block should satisfy the following conditions: when the sliding block moves to the position where the distance between the push rod and the center of the filter bucket is L1, the edge of the sliding block does not exceed the outer edge of the inner cover of the filter bucket, and when the sliding block moves to the position where the distance between the push rod and the center of the filter bucket is L3, the edge of the sliding block is clamped in the locking groove.

Images