Filter barrel with knob type double self-locking structure

Abstract

A rotary knob type filter barrel with a 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, and the filter barrel inner cover and the filter barrel outer cover are sequentially buckled and covered. The rotary self-locking structure comprises a knob on the filter barrel, a rotating shaft on the filter barrel inner cover and a rotating shaft clamping groove in the lower part of the filter barrel outer cover, a pin groove for clamping the rotating shaft is formed in one side, facing the rotating shaft, of the knob, the knob drives the rotating shaft to rotate, and the clamping end of the rotating shaft is clamped into the rotating shaft clamping groove to limit the circumferential degree of freedom of the filter barrel outer cover relative to the filter barrel inner cover.

Description

[Technical field] The invention relates to the technical field of a filter barrel in a water purifier, and in particular to a knob-type double self-locking structure in a filter barrel assembly structure. [Background technology] With the continuous improvement of living standards, the widespread popularization of household and commercial water treatment equipment, users' requirements for drinking water quality are increasing day by day. Many occasions are equipped with water purification equipment such as water purifiers, and the water purifier filter element is the core component of the water purifier. The filter element equipment is placed in the water purifier filter barrel, which is a device for holding the filter element. At present, the water purifier filter barrel is mainly a welded disposable structure and a detachable threaded sealing structure; with the increasing demand for environmental protection and convenience, the disposable filter barrel no longer meets the requirements of environmental protection and cost. The common problem of the detachable filter barrel is that after long-term use, the seal is easy to loosen, resulting in water leakage. Therefore, a new filter barrel sealing locking structure design is urgently needed to improve its reliability.

[0003] At present, during the assembly process of the filter element and the filter barrel structure, the filter element is often assembled into the filter barrel first, the inner cover of the filter barrel is buckled, and then the filter barrel assembly is installed on the outer cover of the filter barrel. This involves the three-in-one process of tightening and locking. It is hoped that the structure can be simplified as much as possible to reduce costs while ensuring the reliability of locking. [Summary of the invention] The present invention improves the existing filter barrel and filter element lock structure, ensuring the reliability of the connection lock while taking into account convenience. A knob-type locking structure is provided between the filter barrel, the filter barrel inner cover and the filter barrel outer cover that are assembled together to achieve synchronous locking of the three structures, so as to achieve stable and reliable locking between the filter barrel and the filter barrel inner cover and between the filter barrel and the filter barrel outer cover. The structure is simple and reliable, and it is convenient for users to operate.

[0005] The present invention relates to a filter barrel with a knob-type double self-locking structure, which comprises a filter barrel, a filter element, a filter barrel inner cover and a filter barrel outer cover. The filter element is installed in the filter barrel, and the filter barrel inner cover and the filter barrel outer cover are sequentially buckled. It is characterized in that a rotary self-locking structure is provided between the filter barrel and the filter barrel inner cover, and the rotary self-locking structure comprises a knob on the filter barrel, a rotating shaft on the filter barrel inner cover and a rotating shaft clamping groove at the lower part of the filter barrel outer cover. A pin groove for clamping the rotating shaft is provided on the side of the knob facing the rotating shaft. The knob drives the rotating shaft to rotate, and the rotating shaft clamping end is clamped in the rotating shaft clamping groove to limit the circumferential freedom of the filter barrel outer cover relative to the filter barrel inner cover.

[0006] The filter barrel wall is provided with a knob penetrating the filter barrel wall, and the knob comprises a rotary handle and a pin groove, wherein the rotary handle is retained on the outer periphery of the filter barrel wall, and the pin groove thereof penetrates the filter barrel wall.

[0007] The pin slot of the knob is a rectangular slot with a notch, and the direction of the notch changes as the handle rotates.

[0008] The filter barrel inner cover comprises an end face and a peripheral surface inserted into the inner wall of the filter barrel, wherein a buckle structure screwed to the inner wall of the filter barrel is provided on the peripheral surface, and a buckle groove is provided on the inner wall of the filter barrel corresponding to the cover buckle structure.

[0009] A rotating shaft groove is provided at the junction of the end surface and the peripheral surface of the filter barrel inner cover, and the rotating shaft is clamped in the rotating shaft groove. The rotating shaft includes a pin shaft end and a clamping end, wherein the pin shaft end and the clamping end are vertically connected as a whole.

[0010] The pin shaft end is arranged in the rotating shaft groove in a self-rotating manner along the radial direction of the filter barrel inner cover, and a rectangular clamping piece is connected to the pin shaft end toward the outer side of the filter barrel inner cover, and the rectangular clamping piece is adapted to be clamped into the pin groove of the knob.

[0011] The rotating shaft groove is in an "L" shape on the end surface of the inner cover of the filter barrel. When the pin end of the rotating shaft is driven by the knob to rotate, the clamping end is screwed out of the rotating shaft groove and clamped into the rotating shaft clamping groove of the outer cover of the filter barrel.

[0012] A dot mark is provided on the handle of the knob.

Brief Description of the Drawings

[0015] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “center”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are positional relationships, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0016] Please refer to the attached Figure 1 , which shows a filter barrel with a knob-type double self-locking structure, including a filter barrel 10, a filter element 20, a filter barrel inner cover 30 and a filter barrel outer cover 40, wherein the filter element 20 is installed in the filter barrel 10, and the filter barrel inner cover 30 and the filter barrel outer cover 40 are sequentially buckled to assemble into an integral filter element structure.

[0017] A rotational self-locking structure 50 is provided between the filter barrel 10 and the filter barrel inner cover 30, and the rotational self-locking structure 50 includes a knob 11 on the filter barrel 10, a rotating shaft 33 on the filter barrel inner cover 30, and a rotating shaft clamping groove 41 at the lower part of the filter barrel outer cover 40. There is a pin groove 111 for clamping the rotating shaft 33 on the side of the knob 11 facing the rotating shaft 33. The knob 11 drives the rotating shaft 33 to rotate, and the rotating shaft clamping end is clamped into the rotating shaft clamping groove 41 to limit the circumferential freedom of the filter barrel outer cover 40 relative to the filter barrel inner cover 30.

[0018] The filter barrel 10 wall is provided with a knob 11 penetrating the filter barrel wall, and the knob 11 comprises a rotary handle 112 and a pin groove 111, wherein the rotary handle 112 is retained on the outer periphery of the filter barrel wall, and the pin groove 111 thereof penetrates the filter barrel wall.

[0019] The pin slot 111 of the knob 11 is a rectangular slot with a notch, and the direction of the notch changes with the rotation of the handle 112. The handle drives the pin slot 111 to rotate, which makes the notch of the pin slot face different directions. Only when it is aligned in the appropriate direction can it be opened for the shaft to be inserted therein, and the shaft can be driven to rotate to complete the locking.

[0020] The filter barrel inner cover 30 includes an end face 31 and a peripheral surface 32 inserted into the inner wall of the filter barrel, wherein a buckle structure 35 is provided on the peripheral surface 32 to be screwed with the inner wall of the filter barrel 10, and a buckle slot 12 is provided on the inner wall of the filter barrel 10 corresponding to the cover buckle structure 35. When the filter barrel inner cover 30 is assembled to the filter barrel, the filter barrel inner cover 30 is screwed tightly, and the buckle structure 35 is slid into the buckle slot 12 to be screwed in.

[0021] Conventional products of the same type will have a buckle and slot tightening structure. If there is no additional locking setting, it may not be tightened enough and become loose, or it may slowly break away from the clamping state and fall off due to slight vibration during the operation of the machine. These are the actual problems we need to consider when setting up the locking structure.

[0022] Please refer to the attached Figure 1 and attached Figure 2 A rotating shaft groove 34 is provided at the junction of the end surface 31 and the peripheral surface 32 of the filter barrel inner cover 30, and the rotating shaft 33 is clamped in the rotating shaft groove 34. The rotating shaft 33 includes a pin end 331 and a clamp end 332, wherein the pin end 331 and the clamp end 332 are vertically connected as a whole. The two parts on the rotating shaft are generally cylindrical, and the axes of the two are perpendicular to each other. The pin end 331 is movably mounted in the rotating shaft groove 34, and the clamp end 332 is only driven by the pin end 331 to rotate. When the pin end 331 rotates on its axis, the clamp end 332 rotates around the axis of the pin end 331.

[0023] Please refer to the attached Figure 2 The pin shaft end 331 is arranged in the shaft groove 34 in a self-rotating manner along the radial direction of the filter barrel inner cover 30, and a rectangular clamping piece 333 is connected to the pin shaft end 331 toward the outer side of the filter barrel inner cover 30, and the rectangular clamping piece 333 is adapted to be clamped into the pin groove 111 of the knob 11.

[0024] Please refer to the attached Figure 4 The shaft groove 34 is in an "L" shape on the end surface of the filter barrel inner cover 30. When the pin end 331 of the shaft 33 is driven by the knob 11 to rotate, the clamping end 332 is screwed out of the shaft groove 34 and clamped into the shaft clamping groove 41 of the filter barrel outer cover 40.

[0025] When the filter barrel outer cover 40 is also buckled onto the filter barrel inner cover 30 and tightened to a preset position, the shaft slot 41 is opposite to the clamping end 332. At this time, the knob 11 is further rotated to drive the clamping end 332 to rotate to a position where it is clamped into the shaft slot 41. This actually limits the rotational freedom of the filter barrel outer cover 40 relative to the filter barrel inner cover 30, thereby achieving circumferential rotation locking of the two.

[0026] The handle 112 of the knob 11 is provided with a point mark 113. The point mark 113 is used to mark and distinguish the notch position of the pin slot 111 at this time, and the notch position reflects the position 332 of the card end, and in this way, the state of the structure at this time can be judged only from the orientation of the handle 112.

[0027] Please refer to the attached Figure 3, showing the three stages of the filter barrel inner cover 30 being buckled onto the filter barrel 10, and then the filter barrel outer cover 40 being covered and locked step by step, the positions and states of each structure, wherein state A: in fact, the rectangular stopper 333 of the rotating shaft exceeds the circumferential length of the filter barrel inner cover 30, and the clamping end 332 of the rotating shaft 33 is reset to state A, and the clamping end 332 points to the 6 o'clock direction in the orientation shown in the figure, at this time, the pin groove 111 of the knob 11 is rotated so that the notch faces the 3 o'clock position, and the filter barrel inner cover 30 After the snap structure 35 is inserted into the snap groove 12 of the filter barrel 10, the rectangular snap member 333 of the rotating shaft 33 on the inner cover of the filter barrel is inserted into it along the notch of the pin groove 111. The size and shape of the rectangular snap member 333 and the pin groove 111 are just matched. After being inserted, the rotation of the knob 11 will drive the rotating shaft 33. When it rotates to a certain angle, the rectangular snap member 333 cannot exit the pin groove 111, thereby locking the tightening assembly of the filter barrel inner cover 30 and the filter barrel 10.

[0028] Continue to rotate to state B, which is the predetermined optimal locking state position. At this time, the clamping end 332 of the shaft 33 points to the 3 o'clock direction, locking the filter barrel inner cover 30 and the filter barrel 10, and does not hinder the tightening process of the filter barrel outer cover 40.

[0029] After tightening the filter barrel outer cover 40 onto the filter element assembly, continue to rotate the handle 112 of the knob 11. At this time, we cannot see the internal pin groove 111. The rotation state of the internal structure can be judged by the point mark 113 on the handle 112. At this time, the card end 332 of the rotating shaft 33 continues to be rotated counterclockwise through the knob 11 until the card end 332 rotates to the 12 o'clock direction, that is, the position shown in state C is achieved. At this time, the card end 332 is rotated and carded into the rotating shaft card groove 41 on the filter barrel outer cover 40, locking the filter barrel outer cover 40 and the filter barrel inner cover 30, that is, completing the trinity of complete locking and not easy to loosen.

[0030] When disassembly is required, just rotate in the opposite direction to release the lock.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A filter barrel with a knob-type double self-locking structure, comprising a filter barrel, a filter element, a filter barrel inner cover and a filter barrel outer cover, the filter element is loaded into the filter barrel, and the filter barrel inner cover and the filter barrel outer cover are sequentially buckled, characterized in that: A rotational self-locking structure is provided between the filter barrel and the inner cover of the filter barrel, and the rotational self-locking structure includes a knob on the filter barrel, a rotating shaft on the inner cover of the filter barrel, and a rotating shaft clamping groove at the lower part of the outer cover of the filter barrel. There is a pin groove for clamping the rotating shaft on the side of the knob facing the rotating shaft. The knob drives the rotating shaft to rotate, and the rotating shaft clamping end is clamped in the rotating shaft clamping groove to limit the circumferential freedom of the outer cover of the filter barrel relative to the inner cover of the filter barrel.

2. According to the filter barrel with a knob-type double self-locking structure as described in claim 1, it is characterized in that: The filter barrel wall is provided with a knob penetrating the filter barrel wall, and the knob comprises a rotary handle and a pin groove, wherein the rotary handle is retained on the outer periphery of the filter barrel wall, and the pin groove thereof penetrates the filter barrel wall.

3. According to claim 2, the filter barrel with a knob-type double self-locking structure is characterized in that: The pin slot of the knob is a rectangular slot with a notch, and the direction of the notch changes as the handle rotates.

4. The filter barrel with a knob-type double self-locking structure according to claim 1 is characterized in that: The filter barrel inner cover comprises an end face and a peripheral surface inserted into the inner wall of the filter barrel, wherein a buckle structure screwed to the inner wall of the filter barrel is provided on the peripheral surface, and a buckle groove is provided on the inner wall of the filter barrel corresponding to the buckle structure.

5. According to claim 4, the filter barrel with a knob-type double self-locking structure is characterized in that: A rotating shaft groove is provided at the junction of the end surface and the peripheral surface of the filter barrel inner cover, and the rotating shaft is clamped in the rotating shaft groove. The rotating shaft includes a pin shaft end and a clamping end, wherein the pin shaft end and the clamping end are vertically connected as a whole.

6. The filter barrel with a knob-type double self-locking structure according to claim 5 is characterized in that: The pin shaft end is arranged in the rotating shaft groove in a self-rotating manner along the radial direction of the filter barrel inner cover, and a rectangular clamping piece is connected to the pin shaft end toward the outer side of the filter barrel inner cover, and the rectangular clamping piece is adapted to be clamped into the pin groove of the knob.

7. The filter barrel with a knob-type double self-locking structure according to claim 5 is characterized in that: The rotating shaft groove is in an "L" shape on the end surface of the inner cover of the filter barrel. When the pin end of the rotating shaft is driven by the knob to rotate, the clamping end is screwed out of the rotating shaft groove and clamped into the rotating shaft clamping groove of the outer cover of the filter barrel.

8. The filter barrel with a knob-type double self-locking structure according to claim 2 is characterized in that: A dot mark is provided on the handle of the knob.

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