A filter element positioning structure and a filter

Abstract

The invention relates to the field of household appliances, and discloses a filter element positioning structure and a filter, wherein the filter element positioning structure comprises: a panel, a fixing cylinder is arranged on the rear side of the panel, and a lower through hole is arranged on the bottom side of the fixing cylinder; a positioning component is arranged on the rear side of the panel, and the positioning component comprises a coil spring and a locking tongue which is transmission-connected to the coil spring, and the coil spring can provide elastic force for the locking tongue to insert upward into the lower through hole or withdraw downward from the lower through hole. The invention utilizes the fixing cylinder to provide fast installation positioning for the filter element, and then utilizes the cooperation of the locking tongue and the filter element to realize locking of the filter element, so that the filter element is installed more stably, and it is ensured that the filter element is installed in place in the fixing cylinder, and it is convenient to use.

Description

Technical Field

[0001] The invention relates to a household appliance, in particular to a filter element positioning structure and a filter. Background Art

[0002] The filter is used to improve water quality and remove impurities in the water. When filtering, it mainly relies on the filter element installed inside to perform adsorption, biochemical reaction and other treatments on the water body, so as to achieve the effect of filtering and purifying. After using the filter for a long time, in order to ensure the effect of water filtration, the filter element needs to be replaced in time. The current filter element is usually fixed in the filter by means of buckles, rotating snaps, etc. The structural stability of the installation is low, and during installation, it is difficult to judge whether the filter element is installed in place in the filter. Therefore, there is an urgent need for a positioning structure that can install the filter element more stably. Summary of the invention

[0003] The purpose of the present invention is to provide a filter element positioning structure and a filter to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the present invention to solve its technical problem is:

[0005] A filter element positioning structure according to an embodiment of the first aspect of the present invention comprises: a panel, a fixing cylinder is arranged on the rear side of which, a lower through hole is arranged on the bottom side of the fixing cylinder; a positioning assembly is arranged on the rear side of the panel, the positioning assembly comprises a coil spring and a locking tongue which is transmission-connected to the coil spring, the coil spring can provide elastic force for the locking tongue to insert upward into the lower through hole or withdraw downward from the lower through hole, the positioning assembly also comprises a dial plate and a limiting plate, the dial plate is movably connected to the rear side of the panel in the up-down direction, a guide hole extending in the up-down direction is arranged on the dial plate, and the dial plate A storage gap is formed between the front side and the rear side of the panel, the coil spring is located in the storage gap, a connecting shaft is formed in the middle of the coil spring, the connecting shaft passes through the guide hole and is connected to the lock tongue, and the ends of the coil spring are formed with an upper clamping block and a lower clamping block arranged at intervals in the up and down directions, the middle part of the limiting piece is connected to the rear side of the panel, the limiting piece is opposite to the storage gap, the upper and lower ends of the limiting piece are bent in the direction close to the storage gap, the upper clamping block can be moved to the top end of the limiting piece or the lower clamping block can be moved to the bottom end of the limiting piece.

[0006] The technical solution has at least the following beneficial effects: when in use, the panel is mounted on an external filter device, the fixing cylinder can be used for inserting the external filter element, and the fixing cylinder is used to provide insertion and support for the filter element. When the filter element needs to be locked and fixed, force is applied to the coil spring in the positioning assembly to store energy in the coil spring, and then the coil spring is released. The elastic force of the coil spring is used to drive the locking tongue to insert upward into the lower through hole on the bottom side of the fixing cylinder, and cooperate with the preset hole position on the filter element, thereby locking the filter element. At this time, the filter element can be restricted from escaping from the fixing cylinder outward. When the filter element needs to be unlocked and fixed, force is also applied to the coil spring in the positioning assembly to allow the coil spring to store energy. The spring stores energy, and then releases the coil spring, using the elastic force of the coil spring to drive the lock tongue downward to exit the lower through hole on the bottom side of the fixed cylinder, thereby separating from the filter element and releasing the lock of the filter element. When the lock tongue exits the lower through hole, the coil spring is at the bottom of the stroke, at which time the connecting shaft connected to the middle of the coil spring is at the bottom end position of the guide hole, and the lower clamping block at the end of the coil spring is at the bottom end of the limiting plate. When the filter element needs to be locked and fixed, the dial plate is moved upward, and the coil spring is driven upward by the dial plate. Due to the pressure limit of the limiting plate on the lower clamping block, the end position of the coil spring cannot move up with the middle position. At this time, the coil spring is gradually tightened and energy is stored. Since the limiting plate is only in the middle The position is fixed on the panel, and the upper and lower ends are bent in an arc shape so that the upper and lower ends of the limit plate can produce a certain elastic deformation until the lower clamping block is subjected to an upward pulling force to overcome the elastic resistance of the lower end of the limit plate to the lower clamping block, and the lower clamping block passes over the lower end of the limit plate, and the coil spring releases its elastic potential energy and moves upward, driving the lock tongue to move upward, so that the lock tongue is inserted into the lower through hole. At this time, the connecting shaft moves along the guide hole to its top position, and the upper clamping block passes over the top of the limit plate, which can limit the lock tongue from falling due to gravity; when the filter element needs to be unlocked, the dial plate is moved downward, and the coil spring is driven downward by the dial plate. Similarly, the limit plate is used to The limit of the upper clamping block at the end can realize the energy storage of the coil spring. When the upper clamping block is subjected to the downward pulling force to overcome the elastic resistance of the upper end of the limiting plate to the upper clamping block, the upper clamping block passes over the upper end of the limiting plate, and the coil spring releases the elastic potential energy and moves downward, driving the locking tongue to move downward, thereby realizing the withdrawal of the locking tongue to the lower through hole. At this time, the connecting shaft moves to its bottom position along the guide hole, and the lower clamping block passes over the bottom end of the limiting plate to realize resetting. In this way, the fixed cylinder can be used to provide quick installation and positioning for the filter element, and the cooperation of the locking tongue and the filter element can realize the locking of the filter element, making the installation of the filter element more stable, ensuring that the filter element is installed in place in the fixed cylinder, and easy to use.

[0007] As a further improvement of the above technical solution, the top of the limiting plate protrudes toward the direction close to the storage gap and forms an upper arc-shaped guide section, the top of the limiting plate extends horizontally toward the direction close to the storage gap, the bottom of the limiting plate protrudes toward the direction close to the storage gap and forms a lower arc-shaped guide section, and the bottom end of the limiting plate extends horizontally toward the direction close to the storage gap. Since the bottom end of the limiting piece extends horizontally in the direction close to the storage gap, the lower blocking block can be smoothly blocked to prevent the lower blocking block from directly moving upward and falling out when it is subjected to upward pulling force.

[0008] As a further improvement of the above technical solution, the bottom angle of the top end of the limiting piece and the top angle of the bottom end of the limiting piece are respectively set as chamfered angles. When the upper clamping block passes over the top end of the limiting piece upward, the chamfered angle of the top end of the limiting piece can be used to guide the upper clamping block, so that the upper clamping block can pass over the limiting piece more easily. Similarly, when the lower clamping block passes over the bottom end of the limiting piece downward, the chamfered angle of the bottom end of the limiting piece can be used to guide the lower clamping block, so that the lower clamping block can pass over the limiting piece more easily.

[0009] As a further improvement of the above technical solution, the upper and lower sides of the dial plate near the limit plate are respectively formed with an upper dial block and a lower dial block. When the dial plate moves up, it can drive the upper dial block to press against the upper arc-shaped guide section, and when the dial plate moves down, it can drive the lower dial block to press against the lower arc-shaped guide section. When the filter element needs to be locked, the dial plate is moved up, and at this time, the upper dial block at the top of the dial plate pushes the top of the limit plate away from the storage gap, so that the upper dial block can pass through the top of the limit plate when the coil spring moves up. Similarly, when the filter element needs to be unlocked, the dial plate is moved down, and at this time, the lower dial block at the bottom of the dial plate pushes the bottom of the limit plate away from the storage gap, so that the lower dial block can pass through the bottom of the limit plate when the coil spring moves down.

[0010] As a further improvement of the above technical solution, a connecting hole is provided on the panel, and a toggle switch is movably connected to the front side of the panel in the up-down direction, and the toggle switch passes through the connecting hole and is connected to the dial plate. When the dial plate needs to be toggled, force can be directly applied to the raised toggle switch on the front side of the panel, and the toggle switch drives the dial plate to move up and down, so as to achieve locking and unlocking of the filter element, thereby improving the convenience of operation.

[0011] As a further improvement of the above technical solution, the toggle switch and the dial plate are detachably connected. The toggle switch and the dial plate can be separated from each other, which improves the convenience of maintaining the dial plate after long-term use.

[0012] As a further improvement of the above technical solution, an upper through hole is provided at the position of the top side of the fixed cylinder directly opposite to the lower through hole, and the locking tongue can pass through the lower through hole and the upper through hole upwards, or exit from the upper through hole and the lower through hole downwards. When the filter element needs to be locked, the locking tongue is inserted upwards into the lower through hole, and after cooperating with the preset hole position of the filter element, it passes through the upper through hole. At this time, the upper and lower side walls of the fixed cylinder can be used to form two locking points for the locking tongue, further improving the convenience of locking the filter element. When the filter element needs to be unlocked, the locking tongue exits the upper through hole and the lower through hole downwards.

[0013] As a further improvement of the above technical solution, the rear side of the panel is connected with a limiting rib, and the coil spring abuts against the limiting rib. The limiting rib abuts against the coil spring for limiting can improve the position stability of the coil spring when moving and better prevent the relative displacement of the coil spring during the activity process.

[0014] A filter according to an embodiment of the second aspect of the present invention comprises: a housing; a filter element; the above-mentioned filter element positioning structure, wherein the panel is connected to the housing, the filter element is inserted into the fixed cylinder, a lock buckle is connected to the rear end of the filter element, the lock buckle is surrounded by a lock hole extending in the up and down directions, and the lock tongue is inserted upward into the lock buckle.

[0015] This technical solution has at least the following beneficial effects: since the filter has the above-mentioned filter element positioning structure, when the filter element needs to be fixed, the lock position can be held by hand and the filter element can be inserted into the fixing tube. The fixing tube can provide quick installation and positioning for the filter element, and then the lock tongue and the lock can cooperate to lock the filter element, making the filter element installation more stable, ensuring that the filter element is installed in place in the fixing tube, and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0017] Figure 1 It is a rear view of the filter element positioning structure of the present invention, at which time the locking tongue exits the lower through hole.

[0018] Figure 2 It is a rear view of the filter element positioning structure of the present invention, and the locking tongue is inserted into the lower through hole.

[0019] Figure 3 It is a three-dimensional diagram of the filter element positioning structure of the present invention without the locking tongue and the shifting plate.

[0020] In the accompanying drawings: 1-panel, 11-fixing cylinder, 111-lower through hole, 112-upper through hole, 12-limiting rib, 21-coil spring, 211-connecting shaft, 212-upper clamping block, 213-lower clamping block, 22-lock tongue, 23-shift plate, 231-guide hole, 232-upper shift block, 233-lower shift block, 24-limiting piece, 241-upper arc guide section, 242-lower arc guide section, 3-toggle switch. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0022] Reference Figure 1 , Figure 2 and Figure 3 A filter element positioning structure according to an embodiment of the first aspect of the present invention comprises: a panel 1, a fixing cylinder 11 is arranged on the rear side of which, a lower through hole 111 is arranged on the bottom side of the fixing cylinder 11; a positioning component is arranged on the rear side of the panel 1, the positioning component comprises a coil spring 21 and a locking tongue 22 which is transmission-connected to the coil spring 21, the coil spring 21 can provide elastic force for the locking tongue 22 to insert upward into the lower through hole 111 or withdraw downward from the lower through hole 111.

[0023] In this filter element positioning structure, when in use, the panel 1 is installed on the external filter device, the fixing cylinder 11 can be used for the external filter element to be inserted, and the fixing cylinder 11 is used to provide insertion and support for the filter element. When the filter element needs to be locked and fixed, force is applied to the coil spring 21 in the positioning component to store energy in the coil spring 21, and then the coil spring 21 is released. The elastic force of the coil spring 21 drives the locking tongue 22 to insert upward into the lower through hole 111 on the bottom side of the fixing cylinder 11, and cooperate with the preset hole position on the filter element, thereby locking the filter element, and at this time, the filter element can be restricted from slipping out of the fixing cylinder 1 1. When the filter element needs to be unlocked, force is applied to the coil spring 21 in the positioning assembly to store energy in the coil spring 21, and then the coil spring 21 is released. The elastic force of the coil spring 21 drives the locking tongue 22 to withdraw downward from the lower through hole 111 on the bottom side of the fixed cylinder 11, thereby separating from the filter element and unlocking the filter element. In this way, the fixed cylinder 11 can be used to provide quick installation and positioning for the filter element, and the lock tongue 22 can be used in conjunction with the filter element to lock the filter element, making the filter element installation more stable and ensuring that the filter element is installed in place in the fixed cylinder 11, which is convenient to use.

[0024] The positioning assembly has a structure that can position the coil spring 21 when it moves to the upper and lower ends of the stroke, so that the lock tongue 22 remains locked after moving to the upper and lower ends, and the coil spring 21 is stored with energy in the initial stage of the up and down movement. In this embodiment, the positioning assembly also includes a dial plate 23 and a limit plate 24. The dial plate 23 is movably connected to the rear side of the panel 1 along the up and down direction. The dial plate 23 is provided with a guide hole 231 extending along the up and down direction. A storage gap is formed between the front side of the dial plate 23 and the rear side of the panel 1. The coil spring 21 is located in the storage gap. A connecting shaft 211 is formed in the middle of the coil spring 21, and the connecting shaft 211 passes through the guide hole 231 and is connected to the lock tongue 22. The end of the coil spring 21 is formed with an upper block 212 and a lower block 213 spaced apart in the up and down directions. The middle of the limiting piece 24 is connected to the rear side of the panel 1, and the limiting piece 24 is directly opposite to the storage gap. The upper and lower ends of the limiting piece 24 are bent in the direction close to the storage gap. The upper block 212 can be moved to the top end of the limiting piece 24 or the lower block 213 can be moved to the bottom end of the limiting piece 24. When the locking tongue 22 is out of the lower through hole 111, the coil spring 21 is at the bottom of the stroke. At this time, the connecting shaft 211 connected to the middle of the coil spring 21 is at the bottom of the guide hole 231. The lower clamping block 213 at the end of the coil spring 21 is at the bottom of the limiting plate 24. When the filter element needs to be locked and fixed, the dial plate 23 is moved upward, and the coil spring 21 is driven upward by the dial plate 23. Due to the pressure and limit of the limiting plate 24 on the lower clamping block 213, the end of the coil spring 21 is The upper and lower ends of the limit plate 24 are bent in an arc shape, so that the upper and lower ends of the limit plate 24 can produce a certain elastic deformation, until the lower clamping block 213 is subjected to the upward pulling force to overcome the elastic resistance of the lower end of the limit plate 24 to the lower clamping block 213, and the lower clamping block 213 passes over the lower end of the limit plate 24, and the coil spring 21 releases the elastic potential energy and moves upward, bringing The movable lock tongue 22 moves upward, so that the lock tongue 22 is inserted into the lower through hole 111. At this time, the connecting shaft 211 moves to its top position along the guide hole 231, and the upper clamping block 212 passes over the top of the limiting plate 24, which can limit the lock tongue 22 from falling due to gravity. When the filter element needs to be unlocked, the dial plate 23 is moved downward, and the coil spring 21 is driven downward by the dial plate 23. Similarly, the limiting of the upper clamping block 212 by the top of the limiting plate 24 can be realized. The coil spring 21 stores energy. When the upper clamping block 212 is subjected to a downward pulling force to overcome the elastic resistance of the upper end of the limiting plate 24 to the upper clamping block 212, the upper clamping block 212 passes over the upper end of the limiting plate 24, and the coil spring 21 releases its elastic potential energy and moves downward, driving the locking tongue 22 to move downward, thereby realizing that the locking tongue 22 withdraws to the lower through hole 111. At this time, the connecting shaft 211 moves to its bottom end position along the guide hole 231, and the lower clamping block 213 passes over the bottom end of the limiting plate 24 to achieve reset.

[0025] In order to enable the limiting plate 24 to better limit the upper block 212 and the lower block 213, in the present embodiment, the top of the limiting plate 24 protrudes in the direction close to the storage gap and forms an upper arc-shaped guide section 241, the top of the limiting plate 24 extends horizontally in the direction close to the storage gap, the bottom of the limiting plate 24 protrudes in the direction close to the storage gap and forms a lower arc-shaped guide section 242, and the bottom end of the limiting plate 24 extends horizontally in the direction close to the storage gap. The upper arc-shaped guide section 241 and the lower arc-shaped guide section 242 are both arc-shaped protruding in the direction of the storage gap. When the upper clamping block 212 passes through the upper arc-shaped guide section 241 upward, the upper arc-shaped guide section 241 can be pressed in the direction away from the storage gap, so that the top of the limiting piece 24 is pushed open in the direction away from the storage gap, thereby facilitating the upper clamping block 212 to pass over the top of the limiting piece 24. Since the top of the limiting piece 24 extends horizontally in the direction close to the storage gap, the upper clamping block 212 can be smoothly blocked to prevent the upper clamping block 212 from When subjected to a downward pulling force, it directly moves downward and disengages. Similarly, when the lower clamping block 213 passes downward through the lower arc-shaped guide section 242, the lower arc-shaped guide section 242 can be pressed in a direction away from the storage gap, so that the top of the limiting piece 24 is pushed open in a direction away from the storage gap, thereby facilitating the lower clamping block 213 to pass over the bottom end of the limiting piece 24. Since the bottom end of the limiting piece 24 extends horizontally in a direction close to the storage gap, the lower clamping block 213 can be smoothly blocked to prevent the lower clamping block 213 from directly moving upward and disengaging when subjected to an upward pulling force.

[0026] Furthermore, the bottom angle of the top end of the limiting piece 24 and the top angle of the bottom end of the limiting piece 24 are respectively set as chamfered angles. When the upper clamping block 212 passes over the top end of the limiting piece 24 upwards, the chamfered angle of the top end of the limiting piece 24 can be used to guide the upper clamping block 212, so that the upper clamping block 212 can pass over the limiting piece 24 more easily. Similarly, when the lower clamping block 213 passes over the bottom end of the limiting piece 24 downwards, the chamfered angle of the bottom end of the limiting piece 24 can be used to guide the lower clamping block 213, so that the lower clamping block 213 can pass over the limiting piece 24 more easily.

[0027] Furthermore, the upper and lower sides of the dial plate 23 near the limiting piece 24 are respectively formed with an upper dial block 232 and a lower dial block 233. When the dial plate 23 moves upward, the upper dial block 232 can be driven to press against the upper arc-shaped guide section 241, and when the dial plate 23 moves downward, the lower dial block 233 can be driven to press against the lower arc-shaped guide section 242. When the filter element needs to be locked, the dial plate 23 is moved upward, and the upper dial block 232 at the top of the dial plate 23 pushes the top of the limiting piece 24 away from the storage gap, so that the upper dial block 232 can pass through the top of the limiting piece 24 when the coil spring 21 moves upward. Similarly, when the filter element needs to be unlocked, the dial plate 23 is moved downward, and the lower dial block 233 at the bottom of the dial plate 23 pushes the bottom of the limiting piece 24 away from the storage gap, so that the lower dial block 233 can pass through the bottom of the limiting piece 24 when the coil spring 21 moves downward.

[0028] In order to facilitate the toggle plate 23 to be moved at the front side of the panel 1, in this embodiment, a connecting hole is provided on the panel 1, and a toggle switch 3 is movably connected to the front side of the panel 1 in the up-down direction, and the toggle switch 3 passes through the connecting hole and is connected to the toggle plate 23. When the toggle plate 23 needs to be toggled, force can be directly applied to the toggle switch 3 protruding at the front side of the panel 1, and the toggle switch 3 drives the toggle plate 23 to move up and down, so as to achieve locking and unlocking of the filter element, thereby improving the convenience of operation.

[0029] The dial plate 23 itself can be provided with a sliding connection structure with the panel 1 to improve the stability of the movement of the dial plate 23, or the dial plate 23 is only dependent on the connection with the toggle switch 3 to be arranged on the rear side of the panel 1 for up and down movement. Furthermore, in this embodiment, the toggle switch 3 and the dial plate 23 are detachably connected. The toggle switch 3 and the dial plate 23 can be separated from each other, which improves the convenience of maintaining the dial plate 23 after long-term use.

[0030] In some embodiments, an upper through hole 112 is provided at the top side of the fixed cylinder 11 facing the lower through hole 111, and the locking tongue 22 can pass through the lower through hole 111 and the upper through hole 112 upwards, or exit from the upper through hole 112 and the lower through hole 111 downwards. When the filter element needs to be locked, the locking tongue 22 is inserted upwards into the lower through hole 111, and after cooperating with the preset hole position of the filter element, it passes through the upper through hole 112. At this time, the upper and lower side walls of the fixed cylinder 11 can be used to form two locking points for the locking tongue 22, further improving the convenience of locking the filter element. When the filter element needs to be unlocked, the locking tongue 22 exits from the upper through hole 112 and the lower through hole 111 downwards.

[0031] In some embodiments, the rear side of the panel 1 is connected to a limiting rib 12, and the coil spring 21 abuts against the limiting rib 12. The limiting rib 12 abuts against the coil spring 21 for limiting, which can improve the position stability of the coil spring 21 during movement and better prevent the relative displacement of the coil spring 21 during the activity.

[0032] A filter according to an embodiment of the second aspect of the present invention comprises: a housing; a filter element; the above-mentioned filter element positioning structure, wherein the panel 1 is connected to the housing, the filter element is inserted into the fixing cylinder 11, a lock buckle is connected to the rear end of the filter element, the lock buckle is surrounded by a lock hole extending in the up-and-down direction, and the lock tongue 22 is inserted upward into the lock buckle.

[0033] Since the filter element positioning structure is provided in this filter, when the filter element needs to be fixed, the lock position can be held by hand and the filter element can be inserted into the fixing cylinder 11. The fixing cylinder 11 can provide quick installation and positioning for the filter element, and then the lock tongue 22 can cooperate with the lock to lock the filter element, making the filter element installation more stable and ensuring that the filter element is installed in place in the fixing cylinder 11, which is easy to use.

[0034] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A filter element positioning structure, characterized in that: include: A panel (1) having a fixing cylinder (11) disposed on its rear side, and a lower through hole (111) disposed on the bottom side of the fixing cylinder (11); A positioning assembly is arranged on the rear side of the panel (1), the positioning assembly comprises a coil spring (21), and a lock tongue (22) which is transmission-connected to the coil spring (21), the coil spring (21) can provide elastic force for the lock tongue (22) to be inserted upward into the lower through hole (111) or to be withdrawn downward from the lower through hole (111), the positioning assembly also comprises a dial plate (23) and a limit plate (24), the dial plate (23) is movably connected to the rear side of the panel (1) in the up-down direction, the dial plate (23) is provided with a guide hole (231) extending in the up-down direction, a storage gap is formed between the front side of the dial plate (23) and the rear side of the panel (1), the coil spring (21) is located at the In the storage gap, a connecting shaft (211) is formed in the middle of the coil spring (21), and the connecting shaft (211) passes through the guide hole (231) and is connected to the locking tongue (22). An upper clamping block (212) and a lower clamping block (213) are formed at the end of the coil spring (21) and are arranged at intervals in the up-down direction. The middle of the limiting piece (24) is connected to the rear side of the panel (1), and the limiting piece (24) is directly opposite to the storage gap. The upper and lower ends of the limiting piece (24) are bent in a direction close to the storage gap. The upper clamping block (212) can be moved to the top end of the limiting piece (24) or the lower clamping block (213) can be moved to the bottom end of the limiting piece (24).

2. A filter element positioning structure according to claim 1, characterized in that: The top of the limiting piece (24) protrudes in a direction close to the storage gap and forms an upper arc-shaped guide section (241), the top of the limiting piece (24) extends horizontally in a direction close to the storage gap, the bottom of the limiting piece (24) protrudes in a direction close to the storage gap and forms a lower arc-shaped guide section (242), and the bottom end of the limiting piece (24) extends horizontally in a direction close to the storage gap.

3. A filter element positioning structure according to claim 2, characterized in that: The bottom angle of the top end of the limiting piece (24) and the top angle of the bottom end of the limiting piece (24) are respectively arranged as chamfered angles.

4. A filter element positioning structure according to claim 2, characterized in that: An upper shifting block (232) and a lower shifting block (233) are respectively formed on the upper and lower sides of the shifting plate (23) close to the limiting piece (24); when the shifting plate (23) moves upward, it can drive the upper shifting block (232) to press against the upper arc-shaped guide section (241); when the shifting plate (23) moves downward, it can drive the lower shifting block (233) to press against the lower arc-shaped guide section (242).

5. A filter element positioning structure according to claim 1, characterized in that: The panel (1) is provided with a connecting hole, and a toggle switch (3) is movably connected to the front side of the panel (1) in the up-down direction, and the toggle switch (3) passes through the connecting hole and is connected to the toggle plate (23).

6. A filter element positioning structure according to claim 5, characterized in that: The toggle switch (3) and the toggle plate (23) are detachably connected.

7. A filter element positioning structure according to claim 1, characterized in that: An upper through hole (112) is provided on the top side of the fixing cylinder (11) directly opposite to the lower through hole (111), and the locking tongue (22) can pass through the lower through hole (111) and the upper through hole (112) upwards, or exit the upper through hole (112) and the lower through hole (111) downwards.

8. The filter element positioning structure according to claim 1, characterized in that: The rear side of the panel (1) is connected to a limiting rib (12), and the coil spring (21) abuts against the limiting rib (12).

9. A filter, characterized in that: include: shell; Filter element; The filter element positioning structure according to any one of claims 1 to 8, wherein the panel (1) is connected to the housing, the filter element is inserted into the fixing cylinder (11), a lock buckle is connected to the rear end of the filter element, the lock buckle is surrounded by a lock hole extending in the up-down direction, and the lock tongue (22) is inserted upward into the lock buckle.

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