CN214485982U - Filter element locking unit and water purifier - Google Patents

Abstract

The utility model relates to a filter core locking unit and purifier, including the filter flask body, filter flask lid and locating part, the filter flask lid can twist soon the first bottleneck department at the filter flask body, forms the filter flask that is used for placing the filter core, and one of them is equipped with the dogtooth between them with the filter flask, and another person is equipped with tooth groove group, and tooth groove group includes two at least tooth's sockets that connect gradually in the filter flask week, when the filter flask lid twists soon to when plugging first bottleneck, the dogtooth inserts in the tooth's socket, and the restriction filter flask lid takes off from first bottleneck department and opens first bottleneck. Based on the tooth's socket group contains two at least tooth's sockets that connect gradually on the filter flask week, at the in-process of changing filter flask in the filter flask, as long as twist the filter flask lid and make shown dogtooth insert one of them tooth's socket, can restrict the filter flask lid and take off from first bottleneck department and open, avoid the condition of leaking to take place, allow certain assembly error, reduce the requirement to manufacturing accuracy, improve the convenience of assembly simultaneously.

Description

Filter element locking unit and water purifier

Technical Field

The utility model relates to a water purification unit technical field especially relates to filter core locking unit and purifier.

Background

Along with the continuous development in purifier equipment field, in order to prolong the life of purifier complete machine, the filter core design in general purifier is removable assembly form. In other words, the water purifier is after using a period of time, and the filter capacity of filter core can descend along with the lapse of length of time of using, but water purifier complete machine shell and other spare parts still are in the validity period, can make the water purifier resume water purification ability through the renew cartridge this moment, extension water purifier life.

And the screwing direction of the filter bottle cover relative to the filter bottle body is consistent with that of the filter bottle body relative to the water purifier complete machine shell. Therefore, in the process of replacing the filter element, in order to avoid the occurrence of water leakage, when the filter bottle body is not detached from the whole machine shell, the reliable matching and locking state between the filter bottle cover and the filter bottle body needs to be ensured. However, after a new filter element is replaced in the filter bottle, the filter bottle cap and the filter bottle body can be reliably assembled together, which requires high manufacturing accuracy.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to after the renew cartridge, for making filter flask lid and filter flask physical stamina enough reliably assemble together, to the higher problem of manufacturing accuracy requirement, provide a filter core locking unit and purifier, can reduce the requirement to manufacturing accuracy.

The utility model provides a filter core locking unit, includes filter flask body, filter flask lid and locating part, the filter flask lid can be twisted soon the first bottleneck department of filter flask body forms the filter flask that is used for placing the filter core, the locating part with one of them is equipped with the dogtooth in the filter flask between them, and another is equipped with tooth groove group, tooth groove group includes at least two the tooth's socket that the filter flask upwards arranged in proper order is worked as the filter flask lid is twisted soon to inciting somebody to action during the shutoff of first bottleneck, the dogtooth inserts in the tooth's socket, the restriction the filter flask lid is followed first bottleneck department pine takes off and opens first bottleneck department first bottleneck.

Above-mentioned scheme provides a filter core locking unit, based on tooth's socket group includes two at least tooth's sockets that filter flask circumference connects gradually are changing the in-process of filter core in the filter flask, as long as twist filter flask lid makes shown dogtooth insert one of them tooth's socket, can restrict filter flask lid is followed first bottleneck department takes off to loosen and opens, and the condition of avoiding leaking takes place, allows certain assembly error, reduces the requirement to manufacturing accuracy, improves the convenience of assembly simultaneously.

In one embodiment, the convex teeth are in an isosceles triangle convex structure, and the vertex angle of each convex tooth is 55-65 degrees.

In one embodiment, when the teeth are located in the splines, the force to twist the bottle such that the teeth elastically deform away from the splines is F1, the force to unscrew the bottle body from the cartridge mount is F2, and F1 is greater than F2.

In one embodiment, the height of the convex teeth is 3 mm-5 mm.

In one embodiment, the stopper is slidably engaged with the filter bottle body, the stopper is movable back and forth relative to the filter bottle body in a direction away from or toward the first bottle opening, the tooth is insertable into the tooth groove when the stopper is slid to the locking position, and the tooth groove is formed on an end surface of the filter bottle cover facing the stopper.

In one embodiment, a guide protrusion is arranged outside the filter bottle body, the limiting part covers the guide protrusion, a first limiting rib and a second limiting rib are arranged on the surface of the limiting part facing the guide protrusion, the first limiting rib and the second limiting rib are arranged along the sliding direction, the first limiting rib and the second limiting rib are arranged at an interval and opposite to each other to form a guide groove, and the guide protrusion is located in the guide groove.

In one embodiment, when the limiting member moves to the locking position and the tooth is located in the tooth slot, the guide protrusion is in clearance fit with the first limiting rib and/or the second limiting rib, and the width of the gap between the guide protrusion and the first limiting rib is smaller than the circumferential distance of rotation required for the tooth to move out of the corresponding tooth slot group.

In one embodiment, one tooth socket group comprises 2n +1 tooth sockets, wherein n is an integer, the tooth pitch of the tooth socket group is h, when the convex tooth is located in the tooth socket at the middle of the tooth socket group, the guide protrusion is in clearance fit with the first limiting rib and the second limiting rib, the width of the gap between the guide protrusion and the first limiting rib and the width of the gap between the guide protrusion and the second limiting rib are d, and 0.5h is more than d and less than (n +0.5) h.

In one embodiment, the protruding tooth is located on the limiting piece and close to the end face of the first bottle opening, and the protruding tooth is located between the first limiting rib and the second limiting rib.

In one embodiment, the limiting member is an annular structure, the limiting member is sleeved outside the filter bottle body, the limiting member can slide along the axial direction of the filter bottle body, the number of the convex teeth is multiple, the multiple convex teeth are arranged at intervals in the circumferential direction of the limiting member, the number of the tooth groove sets is multiple, the multiple tooth groove sets are arranged at intervals in the circumferential direction of the filter bottle cover, and the convex teeth correspond to the tooth groove sets one to one.

In one embodiment, the limiting member is slidably engaged with the filter bottle body, the sliding direction is a direction away from the first bottle opening, and when the limiting member moves out of the locking position, the tooth is withdrawn from the tooth groove.

A water purifier comprises the filter element locking unit, and a filter element is installed in a filter flask.

According to the water purifier, by adopting the filter element locking unit in any embodiment, in the process of assembling after the filter element is replaced, only the filter bottle cap is screwed to the convex tooth to be inserted into one of the tooth grooves, certain assembling error is allowed, the requirement on manufacturing precision is lowered, and meanwhile, the convenience of assembling is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is an exploded view of a removable filter element assembly according to the present embodiment;

FIG. 2 is a schematic view of the removable cartridge assembly of the present embodiment shown removed;

FIG. 3 is a schematic structural view of the stop collar of the present embodiment;

FIG. 4 is a cross-sectional view of the removable cartridge assembly of the present embodiment;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a cross-sectional view of the removable filter cartridge assembly of FIG. 4 from another perspective;

FIG. 7 is a cross-sectional view of the present embodiment shown assembled between a removable filter cartridge assembly and a complete machine housing;

FIG. 8 is an enlarged view of a portion of FIG. 7 at B;

fig. 9 is a schematic structural view of the filter bottle cap according to the present embodiment;

FIG. 10 is a cross-sectional view of the filter cap of FIG. 9;

fig. 11 is a schematic structural view of the filter cartridge according to the present embodiment;

FIG. 12 is a cross-sectional view of a filter cartridge cap, end cap and stop collar assembled together;

figure 13 is a cross-sectional view of the end cap of figure 12.

Description of reference numerals:

10. a removable filter element assembly; 11. a filter flask body; 111. a first bottle opening; 112. a second bottle mouth; 113. a guide projection; 114. the anti-falling bulge is formed; 12. a filter bottle cap; 121. an installation body; 122. a support member; 13. a limiting ring; 131. a limiting member; 132. snapping; 133. a guide groove; 134. a first limiting rib; 135. a second limiting rib; 136. stopping the bulge; 14. a convex tooth; 15. a tooth groove group; 16. a tooth socket; 17. an end cap; 171. a first seal ring; 172. a second seal ring; 173. a third end face; 174. a fourth end face; 175. mounting holes; 176. a limiting bulge; 177. an abutment projection; 18. a connecting member; 181. a limiting end; 19. a filter element; 191. an inner barrel; 192. washing the drain hole; 193. a handle; 20. a filter element mounting seat; 30. a whole machine shell; 31. and a locking protrusion.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

As shown in FIGS. 1, 2 and 3, in one embodiment, a removable cartridge assembly 10 is provided that includes a filter cartridge body 11. The filter bottle cap 12 can be screwed at the first bottle opening 111 of the filter bottle body 11, so that the first bottle opening 111 is sealed. The second bottle opening 112 of the filter flask body 11 can be screwed on the filter element mounting seat 20 of the water purifier, so that the filter element 19 in the filter flask body 11 is correspondingly communicated with each water opening on the filter element mounting seat 20.

Further, as shown in fig. 1 and 2, in one embodiment, the removable filter cartridge assembly 10 further comprises a filter cap 12, and the filter cap 12 is screwed on the first opening 111 of the filter body 11 to form a filter bottle for placing the filter element 19.

When the filter element 19 in the filter bottle needs to be replaced after a certain period of use, the filter bottle body 11 can be detached from the filter element mounting seat 20, so that the water flow path in the water purifier is separated from the filter bottle body 11. Then, the filter flask cover 12 is detached from the filter flask body 11, the first bottle opening 111 is opened, and the filter element 19 is taken out of the filter flask and replaced. When the filter bottle cap 12 is unscrewed, the filter bottle body 11 is already separated from the filter element mounting seat 20, and at this time, the first bottle opening 111 is opened without water leakage.

Further, as shown in fig. 2, when the filter cap 12 is screwed onto the filter body 11 in the same direction as the filter body 11 is screwed onto the filter mounting seat 20, the filter cap 12 may be unscrewed from the filter body 11 before the filter body 11 is not removed from the filter mounting seat 20 during the screwing of the filter cartridge 19, which may cause water leakage.

In view of this, in one embodiment, as shown in fig. 3, a stop 131 is provided, which stop 131 serves as an intermediate element between the filter body 11 and the filter cap 12, to prevent the filter cap 12 from being unscrewed from the filter body 11 before the filter body 11 is removed from the cartridge mounting base 20 during removal.

Specifically, as shown in fig. 4, the stopper 131 can move back and forth relative to the filter bottle in a direction away from the first bottle opening 111. When the limiting member 131 moves forward to the locking position, as shown in fig. 4 and 6, the filter bottle body 11 and the filter bottle cap 12 are both in limiting fit with the limiting member 131, and the filter bottle cap 12 is limited from being released from the first bottle opening 111 to open the first bottle opening 111. When the stopper 131 moves out of the locking position, at least one of the filter bottle body 11 and the filter bottle cap 12 can move relative to the stopper 131, so that the filter bottle cap 12 can be unscrewed from the filter bottle body 11.

When the filter flask body 11 is assembled to the filter element mounting seat 20, the limiting piece 131 is located at the locking position, the filter flask cover 12 is limited and cannot be loosened from the first bottle opening 111 to open the first bottle opening 111, and at the moment, the rotating force acting on the filter flask can only be transmitted to the filter flask body 11 and the matching position of the filter element mounting seat 20, so that the filter flask body 11 and the filter element mounting seat 20 are rotated and disassembled.

Generally, after the detachable filter element assembly 10 is assembled on a water purifier, the end of the filter bottle cover 12 is exposed, and in the detaching process, for convenience, force is directly acted on the filter bottle cover 12 to provide rotating force for the filter bottle. Therefore, it is more necessary to provide the stopper 131 to prevent water leakage.

When the filter bottle body 11 is detached from the filter cartridge mounting seat 20, the stopper 131 moves out of the locking position, and the filter bottle cap 12 can rotate relative to the filter bottle body 11 and be detached from the first mouth 111.

In other words, the filter bottle cap 12 can be screwed with respect to the filter bottle body 11 only when the filter bottle body 11 is detached from the filter cartridge mounting seat 20, thereby effectively avoiding water leakage. And based on the state of the limiting member 131 being switched by moving on the filter flask and the moving direction being a direction away from or close to the first bottleneck 111, in the operation process, when the detachable filter element assembly 10 is detached from the water purifier, the limiting member 131 can be released from the limiting member in the moving direction, and then the filter flask cover 12 can be unscrewed from the filter flask body 11. The whole disassembly process is smooth and quick, and the filter element 19 is more convenient to replace.

Specifically, in an embodiment, as shown in fig. 7 and 8, a locking protrusion 31 may be provided on the whole casing 30 of the water purifier, the whole casing 30 is connected to the filter cartridge mounting seat 20, and when the assembly of the removable filter cartridge assembly 10 and the filter cartridge mounting seat 20 is completed, the locking protrusion 31 limits the limiting member 131 to abut against and be limited at the locking position, so as to limit the filter cartridge cap 12 from being released from the first bottleneck 111 to open the first bottleneck 111.

Or, in another embodiment, a buckle locking member may be disposed on the whole casing 30 of the water purifier, after the assembly of the detachable filter element assembly 10 and the filter element mounting base 20 is completed, the limiting member 131 may be manually pushed to the locking position, and when the limiting member 131 reaches the locking position, the buckle locking member on the whole casing 30 is in buckle fit with the limiting member 131, so as to prevent the limiting member 131 from moving and exiting from the locking position.

Specifically, the limiting member 131 may be slidably engaged with the filter bottle body 11, or the limiting member 131 may be slidably engaged with the filter bottle cap 12. So that the limiting member 131 can move to the locking position and can exit from the locking position under certain conditions.

For example, in one embodiment, as shown in fig. 4, the stopper 131 is slidably engaged with the filter bottle body 11, and the stopper 131 can move back and forth relative to the filter bottle body 11 in a direction away from or close to the first opening 111.

As shown in fig. 4, the filter flask body 11 is a cylindrical structure, and the stopper 131 can move along the axial direction of the filter flask body 11.

When the limiting member 131 moves to the locking position, the limiting fit relationship between the limiting member 131 and the filter bottle cap 12 can be realized by concave-convex fit. In particular, teeth 14 may be provided on one of the retainer 131 and the filter cap 12, and teeth slots 16 may be provided on the other. When the stopper 131 moves forward to the locking position, the teeth 14 are inserted into the teeth grooves 16, and the filter bottle cap 12 is restricted from rotating relative to the stopper 131 until the filter bottle cap 12 is released to open the first bottle mouth 111. When the limiting member 131 moves to exit from the locking position, the teeth 14 exit from the tooth grooves 16, and the filter bottle cap 12 can rotate relative to the limiting member 131, so that the filter bottle cap 12 can be unscrewed from the filter bottle body 11.

Further, the stopper 131 is restricted from rotating in the circumferential direction of the filter bottle body 11 with respect to the filter bottle body 11, so that the filter bottle cap 12 cannot rotate with respect to the filter bottle body 11 when the filter bottle cap 12 cannot rotate with respect to the stopper 131. The term "non-rotatable" as used herein means that the filter cap 12 is not rotatable to release the first mouth 111 but is not rotatable to a small degree to allow the filter cap 12 to be released from the first mouth 111.

Further, in one embodiment, a filter bottle unit is provided that includes a stopper 131 and a filter bottle 11. As shown in fig. 3 and 4, one of the limiting member 131 and the filter body 11 is provided with a guide protrusion 113, the other is provided with a guide groove 133, the guide protrusion 113 is located in the guide groove 133, and a side wall of the guide groove 133 is in clearance fit with the guide protrusion 113 in the screwing direction of the filter cap 12.

According to the filter bottle body unit provided by the above scheme, the limiting piece 131 and the filter bottle body 11 are matched through the guide protrusion 113 and the guide groove 133, so that the limiting piece 131 is limited relative to the filter bottle body 11 in the rotation direction of the filter bottle cap 12, and after the filter bottle cap 12 is matched with the limiting piece 131 through the convex teeth 14 and the tooth grooves 16, the filter bottle cap 12 cannot be unscrewed and loosened from the first bottle opening 111 of the filter bottle body 11 to open the first bottle opening 111, and a water leakage prevention effect is achieved. When the filter bottle cap 12 is screwed on the filter bottle body 11, in order to facilitate the engagement between the teeth 14 and the splines 16, the side wall of the guide groove 133 and the guide protrusion 113 are in clearance fit, so that the limiting member 131 can rotate at a certain small angle in the screwing direction of the filter bottle cap 12, so that the teeth 14 and the splines 16 can be engaged together, the convenience of assembly is improved, and the requirement on manufacturing accuracy is reduced.

Further, in one embodiment, as shown in fig. 1, 2 and 4, the guide projection 113 is provided outside the filter flask body 11. The guide protrusion 113 may serve as a base for sliding engagement of the limiting member 131 with respect to the filter body 11, or may serve as a limiting base for preventing the limiting member 131 from falling off from the filter body 11.

For example, in one embodiment, as shown in fig. 3, 4, 6 and 7, the limiting member 131 covers the guide protrusion 113. As shown in fig. 3, a first limiting rib 134 and a second limiting rib 135 are disposed on the surface of the limiting member 131 facing the guiding protrusion 113, and both of the first limiting rib 134 and the second limiting rib 135 are axially disposed along the filter flask body 11, the first limiting rib 134 and the second limiting rib 135 are oppositely disposed at an interval to form the guiding groove 133, and the guiding protrusion 113 can axially slide along the filter flask body 11 in the guiding groove 133. Under the guiding action of the guide groove 133, the stopper 131 can slide on the filter cartridge body 11 to the locking position along the axial direction of the filter cartridge body 11, and can also slide away from the locking position, so as to switch between the two states.

The first limiting rib 134 and the second limiting rib 135 form two sidewalls of the guiding groove 133, and in one embodiment, when the limiting member 131 moves to the locking position and the protruding tooth 14 is located in the tooth slot 16, the guiding protrusion 113 is in clearance fit with the first limiting rib 134 and/or the second limiting rib 135. In the assembling process, the limiting member 131 can rotate a certain small angle relative to the filter flask body 11 in the screwing direction of the filter flask cover 12, so that the convex teeth 14 and the tooth grooves 16 can be matched together, the assembling convenience is improved, and the requirement on the manufacturing precision is reduced.

Further, in one embodiment, as shown in fig. 3, the side of the limiting member 131 facing the filter bottle body 11 is provided with a retaining protrusion 136. As shown in fig. 4, the guide protrusion 113 is limited on one side of the retaining protrusion 136 close to the first bottleneck 111. Thereby preventing the stopper 131 from sliding off the end of the first mouth 111.

Further, in an embodiment, in order to prevent the limiting member 131 from sliding off from the other end of the filter bottle body 11, as shown in fig. 1, fig. 2 and fig. 4, a side surface of the filter bottle body 11 facing the limiting member 131 is provided with a falling-prevention protrusion 114, and the falling-prevention protrusion 114 is limited on a side of the anti-return protrusion 136 away from the first bottle opening 111.

Further, in one embodiment, as shown in fig. 4, the retaining projection 136 is movable between the drop prevention projection 114 and the guide projection 113 in the axial direction of the filter body 11. In other words, although the falling prevention protrusion 114 and the guide protrusion 113 are respectively limited at both sides of the retaining protrusion 136, the distance between the falling prevention protrusion 114 and the guide protrusion 113 is greater than the thickness of the retaining protrusion 136, so that the retaining protrusion 136 can move therebetween.

More specifically, in one embodiment, as shown in FIGS. 1 and 2, the drop-preventing projection 114 extends circumferentially around the filter cartridge body 11 for at least one revolution. The reliability of anti-falling is improved, and no matter how the retaining protrusions 136 are distributed in the circumferential direction of the filter bottle body 11, the anti-falling protrusions 114 can limit the anti-falling protrusions. Moreover, when the thickness of the anti-drop protrusion 114 in the radial direction of the filter bottle body 11 is sufficient, the anti-drop protrusion 114 can directly block the end surface of the stopper 131, so as to prevent the stopper 131 from dropping from the end of the filter bottle body 11 away from the first bottle opening 111.

Further, in one embodiment, as shown in fig. 4, when the teeth 14 are inserted into the teeth grooves 16, the retaining protrusions 136 are spaced apart from both the guide protrusions 113 and the drop-preventing protrusions 114. The arrangement of the guide projection 113 and the drop-preventing projection 114 is ensured without restricting the insertion of the teeth 14 into the teeth grooves 16.

Further, in one embodiment, as shown in fig. 4, when the tooth 14 is inserted into the tooth slot 16, the spacing between the backstop projection 136 and the drop-off prevention projection 114 is greater than the height of the tooth 14. So as to ensure that the retaining member 131 can move in the direction away from the first bottle opening 111 until the teeth 14 exit from the tooth grooves 16.

Specifically, in one embodiment, when the tooth 14 is inserted into the tooth slot 16, the difference between the interval between the backstop projection 136 and the drop-off prevention projection 114 and the height of the tooth 14 is not less than 1 mm.

Further, in one embodiment, the teeth 14 may be disposed on the retaining member 131, and the splines 16 may be disposed on the filter bottle cap 12; alternatively, the teeth 14 are located on the filter cap 12 and the splines 16 are located on the retainer 131.

Specifically, as shown in fig. 3, in one embodiment, the teeth 14 may be located on the retaining member 131 near the filter bottle cap 12. The splines 16 are formed on the cap 12 at a location facing the teeth 14. Alternatively, in another embodiment, the tooth 14 is located on the filter bottle cap 12 near the stopper 131, and the tooth slot 16 is formed on the stopper 131 toward the tooth 14.

Further, in one embodiment, a cartridge locking unit is provided that includes the filter cartridge body 11, the filter cartridge cap 12, and the retainer 131. As shown in fig. 9 and 10, there are at least two tooth slots 16, and a plurality of tooth slots 16 are sequentially arranged in the circumferential direction of the filter flask to form a tooth slot group 15, and the convex teeth 14 are correspondingly matched with the tooth slot group 15.

Therefore, in the process of assembly, as long as the convex tooth 14 is inserted into one of the tooth grooves 16, the filter bottle cap 12 can be prevented from being loosened and opened from the first bottle mouth 111, the water leakage is avoided, a certain assembly error is allowed, the requirement on the manufacturing precision is reduced, and the convenience of assembly is improved.

In particular, when the number of teeth 14 is plural, the number of groove sets 15 is plural, and the teeth 14 correspond to the groove sets 15 one by one, the groove sets 15 are arranged to include a plurality of grooves 16 connected in series in the circumferential direction of the filter bottle, so that each tooth 14 can be inserted into the groove 16 of the corresponding groove set 15.

Further, in one embodiment, as shown in fig. 3, the protruding tooth 14 is located on the limiting member 131 near the end surface of the first bottle opening 111. As shown in fig. 9 and 10, the splines 16 are located on the end face of the cap 12 facing the teeth 14. In other words, the set of tooth grooves 15 may be formed on the end surface of the filter cap 12 facing the retaining member 131. When the filter bottle cap 12 is screwed to the filter bottle body 11 and the limiting member 131 moves to the locking position, the end surface of the protruding tooth 14 on the limiting member 131 faces the end surface of the filter bottle cap 12, and the protruding tooth 14 is located in the tooth groove 16.

Alternatively, the teeth 14 and the splines 16 may be disposed at other positions, so long as the teeth 14 can be inserted into the splines 16 when the retainer 131 is moved to the locking position after the filter bottle cap 12 is screwed onto the filter bottle body 11.

Further, in one embodiment, as shown in fig. 1 to 4, the limiting member 131 is a ring structure. The limiting member 131 is sleeved outside the filter flask body 11, and the limiting member 131 can slide along the axial direction of the filter flask body 11. So that the stopper 131 can be reliably fitted to the filter cartridge body 11.

Further, as shown in fig. 3, the number of the teeth 14 is plural, and the plural teeth 14 are arranged at intervals in the circumferential direction of the stopper 131. As shown in fig. 9, there are a plurality of tooth grooves 16, each tooth 14 corresponds to a plurality of tooth grooves 16, the plurality of tooth grooves 16 corresponding to the same tooth 14 are sequentially connected to form the tooth groove group 15, the number of tooth groove groups 15 is multiple, and the plurality of tooth groove groups 15 are arranged at intervals in the circumferential direction of the filter bottle cap 12.

When the limiting member 131 and the filter bottle cap 12 are in limiting fit, the teeth 14 and the tooth groove sets 15 may correspond to each other one by one, so as to increase the resistance of the filter bottle cap 12 to rotation relative to the limiting member 131.

Moreover, at least two tooth slots 16 are included in the tooth slot group 15 corresponding to each tooth 14, so that each tooth 14 is inserted into one tooth slot 16 in the tooth slot group 15 during assembly. Certain assembly errors are allowed, and all the convex teeth 14 can be ensured to be inserted into each tooth groove group 15 at the same time, so that the requirement on manufacturing precision is reduced, and the convenience of assembly is improved.

Further, in one embodiment, as shown in fig. 3, the teeth 14 are isosceles triangle convex structures, and the vertex angle of the teeth 14 is 55 ° to 65 °.

The apex angle of the teeth 14 can guide the insertion process of the teeth 14. And the angle of the vertex angle is 55-65 degrees, thereby not only ensuring good guiding effect during assembly, but also ensuring better hand feeling during disassembly. Specifically, when the vertex angle is less than 55 °, the tooth pitch is too small to facilitate alignment, and the guiding effect of inserting the convex teeth 14 into the tooth grooves 16 is poor; when the apex angle was greater than 65, can dismantle filter element group spare 10 when the dismouting from the complete machine casing 30 of purifier, the revolving force can be decomposed into the power that can dismantle filter element group spare 10 dismouting direction through the cooperation inclined plane of dogtooth 14 with tooth's socket 16 and outwards, increases the frictional force that filter flask body 11 and filter core mount pad 20 spiral shell were buckled, increases the moment of dismantling, and the influence is dismantled and is felt.

Further, in one embodiment, when teeth 14 are positioned in splines 16, the force to twist the filter bottle such that teeth 14 elastically deform away from splines 16 is F1, the force to unscrew filter bottle body 11 from cartridge mount 20 is F2, and F1 is greater than F2. Ensuring that during removal, the force on the filter flask first removes the body 11 from the cartridge mount 20, rather than rotating the teeth 14 out of the splines 16.

Based on this, in order to secure the fit between the teeth 14 and the tooth grooves 16, the resistance provided is sufficient, and in one embodiment, the height of the teeth 14 is set to 3mm to 5 mm.

Further, when the limiting member 131 moves to the locking position and the protruding tooth 14 is located in the tooth slot 16, the guiding protrusion 113 is in clearance fit with the first limiting rib 134 and/or the second limiting rib 135, so that the protruding tooth 14 can be smoothly inserted into the corresponding tooth slot group 15 during the assembling process. However, the gap between the guide protrusion 113 and the first limiting rib 134 and/or the second limiting rib 135 cannot be too large, otherwise, the first limiting rib 134 and the second limiting rib 135 lose the limiting and guiding effects, and the convex teeth 14 are separated from the corresponding tooth groove set 15.

Therefore, in one embodiment, the width of the gap between the guide protrusion 113 and the first limiting rib 134 is smaller than the circumferential distance of the rotation required for the teeth 14 to move out of the corresponding tooth groove set 15. That is, although the stopper 131 can slightly rotate in the circumferential direction of the filter bottle body 11, the rotational angle thereof is limited, and it is ensured that the teeth 14 are always positioned in the corresponding tooth groove groups 15 without being deviated, and the stopper function of the stopper 131 with respect to the filter bottle cap 12 is not lost.

Further, in one embodiment, one set of slots 15 includes 2n +1 slots 16, where n is an integer. That is, the number of tooth grooves 16 included in one tooth groove group 15 is odd. The tooth pitch of the tooth groove group 15 is h. When the convex tooth 14 is located in the central tooth slot 16 of the tooth slot group 15, the guide protrusion 113 is in clearance fit with the first limiting rib 134 and the second limiting rib 135, the width of the clearance between the guide protrusion 113 and the first limiting rib 134 and the second limiting rib 135 is d, and 0.5h is more than d and less than (n +0.5) h.

Under the limit action of the first limit rib 134 and the second limit rib 135, even if the guide protrusion 113 swings between the two, the gap width is large enough to allow the teeth 14 to always face the tooth groove group 15 without deviating.

For example, specifically, in one embodiment, as shown in fig. 9 and 10, the tooth slot set 15 includes 3 tooth slots 16, when the protruding tooth 14 is located in the middle tooth slot 16 of the tooth slot set 15, the guiding protrusion 113 is in clearance fit with both the first limiting rib 134 and the second limiting rib 135, and the width of the clearance between the guiding protrusion 113 and both the first limiting rib 134 and the second limiting rib 135 is d, where 0.5h < d ≦ 1.5 h.

Further, in one embodiment, as shown in fig. 3, the limiting member 131 is a ring structure. The number of the guide protrusions 113 is plural, and the plurality of guide protrusions 113 are arranged at intervals in the circumferential direction of the filter flask body 11. The number of the guide grooves 133 is plural, the plural guide grooves 133 are arranged at intervals along the circumferential direction of the limiting member 131, and the guide protrusions 113 correspond to the guide grooves 133 one to one. In other words, if the first limiting rib 134, the second limiting rib 135 and the elastic buckle 132 form a plurality of limiting groups, the plurality of limiting groups are arranged at intervals in the circumferential direction of the limiting member 131.

Further, in one embodiment, as shown in fig. 3, the teeth 14 are located between the first limiting rib 134 and the second limiting rib 135.

Here, the fact that the pair of teeth 14 is located between the first limiting rib 134 and the second limiting rib 135 means that the teeth 14 are located between an extension line of the first limiting rib 134 and an extension line of the second limiting rib 135. In other words, the tooth 14 is not limited to being located between the first limiting rib 134 and the second limiting rib 135, and for the case where the tooth 14 is located on the end surface of the limiting member 131, the tooth 14 is located between the extension line of the first limiting rib 134 and the extension line of the second limiting rib 135.

In addition, when the teeth 14 are provided on the filter cap 12, the teeth 14 are also located between the first stopper rib 134 and the second stopper rib 135 when the teeth 14 are inserted into the teeth grooves 16.

Further, in an embodiment, as shown in fig. 3, a portion of the limiting member 131 between the first limiting rib 134 and the second limiting rib 135 is a snap 132. The retaining protrusion 136 is located on the inner side of the latch 132, and the latch 132 can be elastically deformed by being pressed outward.

During the assembly process, the retainer 131 moves axially along the filter bottle body 11, so that the retaining protrusion 136 moves from one side of the guide protrusion 113 close to the first bottle opening 111 to the other side, and during the process, the elastic buckle 132 deforms elastically so that the retaining protrusion 136 passes over the guide protrusion 113. When the retaining protrusion 136 reaches the side of the guide protrusion 113 far away from the first bottle opening 111, the elastic buckle 132 is reset, so that the retaining protrusion 136 is limited by the guide protrusion 113 at the side far away from the first bottle opening 111, and the limiting member 131 is prevented from falling off from the end of the first bottle opening 111.

Especially when the limiting member 131 is an annular structure, as long as the limiting member 131 can be prevented from sliding off from the two ends of the filter flask body 11, the limiting member 131 cannot fall off from the filter flask body 11, and the situation that the limiting member 131 is lost is effectively avoided.

In an embodiment, as shown in fig. 3, a limiting ring 13 is provided, which includes the limiting member 131, the limiting member 131 is an annular structure, the inner side surface of the limiting member 131 is provided with a first limiting rib 134 and a second limiting rib 135 which are both arranged along the axial direction of the limiting member 131, a position of the limiting member 131 between the first limiting rib 134 and the second limiting rib 135 is an elastic buckle 132, the inner side surface of the elastic buckle 132 is provided with a stop protrusion 136, and the elastic buckle 132 can be pressed outwards to generate elastic deformation.

During assembly, the limiting ring 13 can be sleeved outside the filter bottle body 11, and based on the elastic deformation capability of the elastic buckle 132, the stopping protrusion 136 can be located on one side of the guide protrusion 113 away from the first bottle opening 111 by axially pushing the limiting ring 13 along the filter bottle body 11, and meanwhile, the guide protrusion 113 is also located between the first limiting rib 134 and the second limiting rib 135, so that the rotation of the limiting ring 13 relative to the filter bottle body 11 in the circumferential direction is limited. The limitation of a plurality of directions is completed in the alignment assembly process at one time, and the assembly convenience is improved.

Further, in an embodiment, as shown in fig. 3, a gap is formed between the portion of the limiting member 131 on which the first limiting rib 134 is disposed and the elastic buckle 132, and a gap is formed between the portion of the limiting member 131 on which the second limiting rib 135 is disposed and the elastic buckle 132. Only one side of the latch 132 is connected to the limiting member 131, so that the latch 132 has a certain elastic deformation capability.

Specifically, in one embodiment, as shown in fig. 3, the notch penetrates through the first end surface of the limiting member 131. The retaining protrusion 136 is located on the latch 132 near the first end surface. The end of the latch 132 for connecting with the limiting member 131 is a fixed end, and the end of the latch 132 away from the fixed end is a free end. The retaining projection 136 is located at the free end of the latch 132. During assembly, the elastic buckle 132 is elastically deformed, so that the retaining protrusion 136 passes over the guide protrusion 113 and is limited by the guide protrusion 113 at a side away from the first bottle opening 111.

Further, in one embodiment, as shown in fig. 3 and 4, the tooth 14 or the tooth slot 16 is located on the second end surface of the retaining member 131. When the limiting member 131 is assembled to the filter bottle body 11, the first end face faces the end of the filter bottle body 11 away from the first opening 111, and the second end face faces the filter bottle cap 12. The teeth 14 just engage the teeth slots 16 during the screwing of the filter cap 12 onto the filter body 11.

When the stop collar 13 of fig. 3 is assembled to the filter flask body 11 of the angle removable cartridge assembly 10 of fig. 4, the first end faces downward and the second end faces upward.

Further, in an embodiment, as shown in fig. 3, the limiting member 131 is an annular structure, the second end surface of the limiting member 131 is provided with a protruding tooth 14 or a tooth socket 16, the protruding tooth 14 or the tooth socket 16 is located between the first limiting rib 134 and the second limiting rib 135, and the anti-back protrusion 136 is located on the snap 132 near the first end surface. In the assembling process, the guide protrusion 113 is limited between the first limiting rib 134 and the second limiting rib 135, and after the retaining protrusion 136 passes over the guide protrusion 113, the position of the tooth socket 14 (tooth socket 16) on the limiting member 131 just corresponds to the tooth socket 16 (tooth socket 14) on the filter bottle cap 12. The convex teeth 14 or the tooth grooves 16 are arranged close to the elastic buckle 132, the first limiting rib 134 and the second limiting rib 135, so that the assembling precision can be effectively improved.

Further, in another embodiment, the stopper 131 is slidably engaged with the filter bottle cap 12, and the sliding direction is an axial direction of the filter bottle cap 12. In other words, the stop member 131 is provided on the filter bottle cap 12, the stop member 131 is preliminarily assembled to the filter bottle body 11 together with the filter bottle cap 12, and then the stop member 131 is moved to the locking position by moving the stop member 131 relative to the filter bottle cap 12. When the limiting member 131 reaches the locking position, the limiting member 131 is engaged with the filter flask body 11 for limiting, so that the filter flask body 11 cannot rotate relative to the limiting member 131, and the filter flask cover 12 cannot be released from the first flask opening 111.

Specifically, in one embodiment, one of the retaining member 131 and the filter bottle body 11 is provided with a tooth 14, and the other is provided with a tooth slot 16, and when the retaining member 131 moves to advance to the locking position, the tooth 14 is inserted into the tooth slot 16, and the rotation of the filter bottle body 11 relative to the retaining member 131 is limited. When the limiting member 131 moves out of the locking position, the teeth 14 are withdrawn from the tooth grooves 16, so that the filter bottle cap 12 and the limiting member 131 can be detached from the filter bottle body 11 together, and the filter element 19 in the filter bottle body 11 can be taken out and replaced.

More specifically, in one embodiment, the limiting member 131 is located on the outer side of the filter bottle cap 12, the protruding tooth 14 is located on the outer side of the filter bottle body 11, and the tooth slot 16 is formed on the limiting member 131 at a position facing the protruding tooth 14.

Specifically, in one embodiment, the tooth tip of the tooth 14 on the filter bottle body 11 may face outward along the radial direction of the filter bottle body 11, the limiting member 131 is an annular structure, the tooth socket 16 is located on the inner side surface of the limiting member 131, when the limiting member 131 moves to the locking position, the portion of the limiting member 131 on which the tooth socket 16 is located is sleeved outside the portion of the filter bottle body 11 on which the tooth 14 is located, and the tooth 14 is located in the tooth socket 16.

When the convex teeth 14 are in an isosceles triangle convex structure, the vertex angle of the convex teeth 14 is the tooth tip of the convex teeth 14. In the embodiment of the retainer ring 13 shown in fig. 3, when the retainer ring 13 is assembled to the filter bottle body 11, the tips of the teeth 14 face the filter bottle cap 12 in the axial direction of the filter bottle body 11.

Alternatively, the tooth 14 may be located on the retaining member 131, and the tooth socket 16 is located on the filter bottle body 11.

Further, in an embodiment, the limiting member 131 is an annular structure, the limiting member 131 is sleeved outside the filter bottle cap 12, and the limiting member 131 can slide along the axial direction of the filter bottle cap 12. The number of the convex teeth 14 is plural, the plurality of convex teeth 14 are arranged at intervals along the circumferential direction of the filter bottle body 11, the number of the tooth sockets 16 is plural, each convex tooth 14 corresponds to the plurality of tooth sockets 16, the tooth sockets 16 corresponding to the same convex tooth 14 are sequentially connected to form a tooth socket group 15, and the plurality of tooth socket groups 15 are arranged at intervals along the circumferential direction of the limiting member 131.

Similar to the scheme of slidably arranging the limit ring 13 on the filter bottle body 11, the limit piece 131 is sleeved outside the filter bottle cap 12, and the arrangement of the tooth socket group 15 can reduce the requirement on the alignment precision between the limit piece 131 and the filter bottle body 11 in the assembly process, as long as the convex teeth 14 are inserted into one tooth socket 16 in the corresponding tooth socket group 15.

Further, in one embodiment, as shown in fig. 4, the removable cartridge assembly 10 further comprises an end cap 17, the end cap 17 is connected to the filter cap 12, and the end cap 17 is located in the space enclosed by the filter cap 12. When the filter bottle cap 12 is assembled to the first mouth 111 of the filter bottle body 11, the end cap 17 moves together with the filter bottle cap 12, and is inserted into the filter bottle body 11 to close the first mouth 111.

In the process of disassembly, when the spacing between the spacing ring 13 and the filter bottle cap 12 is released, and the filter bottle cap 12 is screwed down from the filter bottle body 11, the end cap 17 moves together with the filter bottle cap 12, so that the end cap 17 is pulled out from the filter bottle body 11, and the filter element 19 in the filter bottle body 11 is replaced.

Further, as shown in fig. 4, a first sealing ring 171 is disposed between the end cap 17 and the inner wall of the first opening 111 of the filter bottle body 11, so as to ensure that the first opening 111 can be reliably sealed after the end cap 17 is inserted into the filter bottle body 11.

Further, during the process of rotating the filter bottle cap 12 relative to the filter bottle body 11, in order to avoid the rotation of the end cap 17 relative to the filter bottle body 11, the resistance during the screwing process is large, and the disassembly is not convenient enough. In one embodiment, as shown in fig. 4, 5, 12 and 13, the removable cartridge assembly 10 further comprises a connector 18, and an end cap 17 is movably connected to the bottom wall of the filter cartridge cap 12 by the connector 18 such that the filter cartridge cap 12 does not rotate the end cap 17 when rotated, and the bottom wall of the filter cartridge cap 12 can squeeze the end cap 17 during assembly of the filter cartridge cap 12 to the filter cartridge body 11 to insert the end cap 17 into the filter cartridge body 11; during the process of removing the filter cap 12 from the filter body 11, the filter cap 12 is able to pull the end cap 17 out of the filter through the connector 18.

Specifically, as shown in fig. 4, 5 and 12, in one embodiment, the inner side of the bottom wall of the filter bottle cap 12 is provided with a mounting body 121. As shown in fig. 12 and 13, the end cap 17 facing the bottom wall of the filter cap 12 is a third end 173, and the end cap 17 facing the inside of the filter body 11 is a fourth end 174. As shown in fig. 13, the end cap 17 is provided with a mounting hole 175, and the mounting hole 175 penetrates through the third end surface 173 and the fourth end surface 174 of the end cap 17. The mounting body 121 is inserted into the mounting hole 175, and the end cap 17 can rotate relative to the mounting body 121. As shown in fig. 4 and 5, one end of the connecting member 18 is connected to the mounting body 121, and the other end of the connecting member 18 is in limit fit with the end cap 17 for limiting the axial movement of the end cap 17 relative to the connecting member 18 on the filter bottle cap 12. Thus, when the filter bottle cap 12 is rotated relative to the filter bottle body 11, the end cap 17 will not rotate with the filter bottle cap 12, but the end cap 17 will move axially with the filter bottle cap 12 on the filter bottle cap 12.

Specifically, as shown in fig. 5, the connector 18 is a screw disposed in the mounting body 121, and a nut of the screw is in limited engagement with the end cap 17 to limit axial movement of the end cap 17 relative to the connector 18 on the filter bottle cap 12, but is spaced from a sidewall of the mounting hole 175 such that the end cap 17 does not rotate with the filter bottle cap 12.

More specifically, as shown in fig. 12, the side wall of the end cap 17 is spaced apart from the side wall of the filter bottle cap 12 such that when the end cap 17 is inserted into the filter bottle body 11, the side wall of the filter bottle cap 12 fits over the filter bottle body 11.

Further, as shown in fig. 5 and 12, in one embodiment, one end of the connecting member 18 for engaging with the end cap 17 is a limiting end 181, and the inner wall of the mounting hole 175 is provided with a limiting protrusion 176, and the limiting protrusion 176 is limited on a side of the limiting end 181 close to the third end surface 173, so as to limit the movement of the end cap 17 relative to the connecting member 18 in the axial direction of the filter bottle cap 12.

When the connecting member 18 is the screw, the limiting end 181 is a nut of the screw, and the nut of the screw is located on a side of the limiting protrusion 176 away from the third end surface 173.

Specifically, as shown in fig. 5, the limiting protrusions 176 are plural, and the limiting protrusions 176 are arranged at intervals in the circumferential direction of the mounting hole 175. Alternatively, the limiting protrusion 176 is an annular protrusion circumferentially disposed along the mounting hole 175.

The aperture of the space surrounded by the limiting protrusion 176 is smaller than the outer diameter of the limiting end 181, so that the limiting end 181 is limited on the side of the limiting protrusion 176 away from the third end surface 173.

Further, as shown in fig. 13, an abutting protrusion 177 is disposed on the end surface of the limiting protrusion 176 close to the limiting end 181, and the abutting protrusion 177 abuts against the limiting end 181, so as to reduce friction between the connecting member 18 and the end cap 17 when the filter bottle cap 12 rotates.

Specifically, as shown in fig. 13, the abutting protrusion 177 is plural, and the plural abutting protrusions 177 are arranged at intervals in the circumferential direction of the mounting hole 175.

Further, in one embodiment, a spacer (not shown) is disposed between the retaining end 181 and the retaining protrusion 176 to further reduce the friction force exerted indirectly on the filter bottle cap 12 by the end cap 17 when the filter bottle cap 12 is rotated.

Further, as shown in fig. 5, a second sealing ring 172 is disposed between the mounting body 121 and the sidewall of the mounting hole 175. The liquid in the filter bottle body 11 is prevented from leaking from the gap between the mounting body 121 and the mounting hole 175.

Further, as shown in fig. 5, the second sealing ring 172 is located on a side of the limiting protrusion 176 close to the third end surface 173, so that the limiting protrusion 176 can effectively prevent the second sealing ring 172 from falling off from an end of the mounting body 121 far away from the bottom wall of the filter bottle cap 12.

Further, in order to improve the stability of the second sealing ring 172 at the upper limit position of the mounting body 121, as shown in fig. 5 and 10, the mounting body 121 may be divided into a first section and a second section in the axial direction of the filter bottle cap 12, the first section is connected between the second section and the bottom wall of the filter bottle cap 12, the outer diameter of the first section is larger than that of the second section, and a step is formed on the outer side surface of the mounting body 121. The second seal ring 172 is sleeved outside the second section, and the first section is limited at one side of the second seal ring 172 close to the third end surface 173.

Thereby, in combination with the stop protrusion 176 and the first segment, the position of the second sealing ring 172 on the mounting body 121 is defined, ensuring the sealing effectiveness of the second sealing ring 172.

Further, as shown in fig. 10 and 12, a support 122 is disposed on an inner side surface of a bottom wall of the filter bottle cap 12, the support 122 is located between the mounting body 121 and a side wall of the filter bottle cap 12, and the support 122 abuts against the end cap 17 to prevent the end cap 17 from being deformed and broken under pressure. In particular, the support 122 may be a support rib.

Further, in another embodiment, a water purifier is provided, which includes the filter element locking unit in any one of the above embodiments. By adopting the filter element locking unit in any one of the above embodiments, during the assembly process after the filter element 19 is replaced, only the filter cap 12 is screwed to the convex tooth 14 and inserted into one of the tooth grooves 16, thereby allowing a certain assembly error, reducing the requirement on the manufacturing precision and improving the convenience of assembly.

Further, in another embodiment, a water purifier is provided, which comprises the filter bottle unit in any one of the above embodiments. Because the guide protrusion 113 and the side wall of the guide groove 133 have a gap therebetween, the limiting member 131 can rotate relative to the filter flask body 11 within a certain angle, so that the teeth 14 and the tooth grooves 16 can be conveniently matched together, the assembly convenience is improved, and the requirement on the manufacturing accuracy is reduced.

Further, in one embodiment, a water purifier is provided, comprising the detachable filter element assembly 10 of any one of the above embodiments.

By adopting the detachable filter element assembly 10 in any of the above embodiments, the convenience of replacing the filter element 19 is improved while the occurrence of water leakage is avoided when the filter element 19 is detached.

Further, in an embodiment, as shown in fig. 2, the water purifier further includes a filter cartridge mounting seat 20, the filter cartridge body 11 is screwed on the filter cartridge mounting seat 20, the screwing direction of the filter cartridge body 11 is the same as the rotating direction of the filter cartridge cover 12 screwed on the filter cartridge body 11, and the second bottle opening 112 of the filter cartridge body 11 is communicated with the filter cartridge mounting seat 20.

The openings at the two ends of the filter flask body 11 are respectively a first opening 111 and a second opening 112, and the filter element 19 in the filter flask is communicated with each water opening on the filter element mounting seat 20 through the second opening 112. The filter bottle cap 12 is detachably mounted to the first mouth 111 of the filter bottle body 11. Because the screwing direction of the filter bottle body 11 is consistent with the rotating direction of the filter bottle cap 12 screwed on the filter bottle body 11, the filter bottle body 11 and the filter element mounting seat 20 are not separated in the disassembling process, and the filter bottle cap 12 is firstly loosened. The limiting member 131 is further provided, and the limiting member 131 is used as an intermediate element, so that the filter bottle cap 12 can be prevented from loosening and leaking, and the filter bottle cap 12 can be smoothly taken down after the filter bottle body 11 is separated from the filter element mounting seat 20.

Further, in an embodiment, as shown in fig. 7 and 8, the water purifier further includes a complete machine housing 30, the filter cartridge mounting seat 20 is connected to the complete machine housing 30, a locking protrusion 31 is disposed on the complete machine housing 30, and when the detachable filter cartridge assembly 10 is assembled with the filter cartridge mounting seat 20, the locking protrusion 31 limits the limiting member 131 in the locking position in an abutting manner.

When the limiting member 131 is slidably fitted on the filter flask body 11, after the filter flask body 11 and the filter cartridge mounting seat 20 are assembled, the relative position between the filter flask body 11 and the locking protrusion 31 is fixed, and the locking protrusion 31 limits the limiting member 131 to the locking position in an abutting manner.

In the process of disassembly, when the filter bottle body 11 is not disassembled from the filter cartridge mounting seat 20, the locking protrusion 31 always limits the limiting member 131 at the locking position, and as the filter bottle body 11 is gradually withdrawn from the complete machine housing 30, the limiting member 131 gradually disengages from the locking protrusion 31, at this time, the limiting member 131 can be pushed in the direction away from the first bottle opening 111, so that the limiting member 131 exits from the locking position, and the tooth 14 exits from the tooth groove 16.

Further, in one embodiment, the filter flask has a filter element 19 mounted therein, and as shown in fig. 11, the filter element 19 includes a core and an inner barrel 191, and the core is disposed in the inner barrel 191. The inner cylinder 191 is spaced apart from the filter flask, and a handle 193 is disposed on the inner cylinder 191 near the first bottleneck 111.

When the filter cap 12 is detached from the filter body 11, the filter element 19 is removed from the filter body 11 by the handle 193, and then the core body in the inner cylinder 191 is replaced, and then the filter element 19 with a new core body is loaded into the filter.

Further, as shown in fig. 11, a washing drain hole 192 is formed on the inner cylinder 191. When the filter element 19 can be cleaned by flushing to restore the water purification capacity, the filter element 19 does not need to be replaced. At this time, the washing water can be injected into the filter element 19 from the raw water inlet and/or the pure water outlet of the detachable filter element assembly 10 to wash the core in the filter element 19, and the washed sewage is discharged from the washing water discharge hole 192 on the inner cylinder 191 to the gap between the inner cylinder 191 and the filter bottle body 11, and then discharged out of the filter bottle body 11 from the concentrated water discharge hole on the filter bottle body 11.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (12)

1. The utility model provides a filter core locking unit, its characterized in that, includes filter flask body, filter flask lid and locating part, the filter flask lid can be twisted soon the first bottleneck department of filter flask body forms the filter flask that is used for placing the filter core, the locating part with one of them is equipped with the dogtooth between them of filter flask, and another is equipped with tooth groove group, tooth groove group includes at least two and is in the tooth's socket that filter flask upwards arranged in proper order works as the filter flask lid is twisted soon to inciting somebody to action during the shutoff of first bottleneck, the dogtooth inserts in the tooth's socket, the restriction the filter flask lid is followed first bottleneck department pine takes off and opens first bottleneck department first bottleneck.

2. A filter element locking unit as claimed in claim 1, wherein the teeth are of isosceles triangular protrusion configuration, and the apex angle of the teeth is 55 ° to 65 °.

3. The cartridge locking unit of claim 1, wherein when the tooth is positioned in the detent, a force to screw the filter bottle such that the tooth elastically deforms away from the detent is F1, a force to unscrew the filter bottle body from the cartridge mounting block is F2, and F1 is greater than F2.

4. A cartridge locking unit as recited in claim 1, wherein the lobe height is 3mm to 5 mm.

5. The filter cartridge locking unit of any one of claims 1 to 4, wherein the retainer is slidably engaged with the filter body, the retainer being movable back and forth relative to the filter body in a direction away from or toward the first mouth, the teeth being insertable into the splines formed on an end surface of the filter cap facing the retainer when the retainer is slid to the locked position.

6. The filter cartridge locking unit according to claim 5, wherein a guide protrusion is provided outside the filter bottle body, the limiting member covers the guide protrusion, a first limiting rib and a second limiting rib are provided on a surface of the limiting member facing the guide protrusion, the first limiting rib and the second limiting rib are provided along a sliding direction, the first limiting rib and the second limiting rib are arranged at an interval to form a guide groove, and the guide protrusion is located in the guide groove.

7. The cartridge locking unit of claim 6, wherein when the retaining member is moved to the locking position and the tooth is positioned in the tooth slot, the guide protrusion is in clearance fit with the first and/or second retaining ribs, and the width of the gap between the guide protrusion and the first retaining rib is less than the circumferential distance of rotation required for the tooth to move out of the corresponding tooth slot set.

8. A filter cartridge locking unit according to claim 6, wherein one set of splines comprises 2n +1 splines, where n is an integer, the pitch of the set of splines is h, and when the tooth is located in the central spline of the set of splines, the guide protrusion is in clearance fit with both the first and second limiting ribs, and the width of the clearance between the guide protrusion and the first and second limiting ribs is d, and 0.5h < d ≦ n +0.5 h.

9. The cartridge locking unit of claim 6, wherein the teeth are located on the retaining member at an end surface proximate the first port, the teeth being located between the first retaining rib and the second retaining rib.

10. The filter cartridge locking unit according to claim 5, wherein the retaining member is a ring-shaped structure, the retaining member is sleeved outside the filter bottle body, the retaining member is capable of sliding along an axial direction of the filter bottle body, the number of the teeth is plural, the plural teeth are arranged at intervals in a circumferential direction of the retaining member, the number of the tooth grooves is plural, the plural tooth grooves are arranged at intervals in a circumferential direction of the filter bottle cap, and the teeth and the tooth grooves are in one-to-one correspondence.

11. The filter cartridge locking unit of any one of claims 1 to 4, wherein the retaining member is slidably engaged with the filter body in a direction away from the first mouth, and wherein the teeth are withdrawn from the splines when the retaining member is moved out of the locking position.

12. A water purification machine, comprising a filter element locking unit as claimed in any one of claims 1 to 11, wherein a filter element is installed in the filter bottle.

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