A pre-filter dismounting wrench

Abstract

The application provides a pre-filter dismounting wrench, which comprises a plastic shell, an inner cavity is arranged in the plastic shell, a clamping cavity is formed around the inner circumferential surface of the plastic shell, and the clamping cavity is used for adapting to the outer wall of a filter bottle; and a metal inner core is fixedly arranged in the inner cavity, and the metal inner core is provided with at least one stress receiving part, which is used for clamping the rib position of the filter bottle. While the strength of the wrench is ensured, the metal shell is prevented from directly contacting the filter bottle, so that the filter bottle is prevented from being scratched or deformed, and the service life of the filter bottle is prolonged.

Description

Technical Field

[0001] This application relates to the field of filtration equipment technology, and more specifically, to a pre-filter removal wrench. Background Technology

[0002] The city's water supply pipelines are old and long. Rust, silt and other impurities in the pipelines can cause water-using equipment to malfunction. Therefore, it is necessary to install filtration devices on the water-using equipment.

[0003] A pre-filter is the first coarse filtration device for the whole house's water supply. It can filter out sediment, rust, and large particles from tap water. It prevents the large amount of sediment and impurities generated in urban and residential water supply networks from causing harm to the human body, and also plays a positive pre-protective role in concealed pipes, faucets, plumbing, water heaters, boilers, central air conditioning, washing machines, dishwashers, coffee machines, and other water appliances (water purifiers, reverse osmosis systems, water softeners).

[0004] Currently, wrenches on the market cannot combine strength and lightweight design, which limits their application. Utility Model Content

[0005] This application provides a pre-filter removal wrench that solves the problem of insufficient wrench strength and easy scratching of the filter bottle.

[0006] This application provides a pre-filter removal wrench, comprising:

[0007] A plastic outer shell, wherein the interior of the plastic outer shell has an inner cavity, and the inner circumferential surface of the plastic outer shell surrounds a locking cavity, which is used to fit the outer wall of the filter bottle;

[0008] A metal inner core is fixed in the inner cavity. The metal inner core is provided with at least one force-bearing part, which is used to clamp the filter bottle ribs.

[0009] In some embodiments, the plastic housing includes a shell, the shell including a handheld component and a locking component, the handheld component being fixedly connected to the locking component, the interior of the handheld component and the locking component communicating to form the inner cavity, the inner peripheral surface of the locking component surrounding to form the engaging cavity, and the inner peripheral surface of the locking component having at least one clearance notch for the force-bearing part to extend from the inner cavity to the engaging cavity.

[0010] In some embodiments, the plastic housing is a one-piece injection-molded plastic housing.

[0011] In some embodiments, the metal core includes a body and a connector, the connector being connected to the body, and the body and the connector being fixedly connected to the inner cavity.

[0012] In some embodiments, the inner cavity is a semi-circular inner cavity, the main body is a semi-circular main body, and the inner cavity is provided with a plurality of first limiting structures distributed circumferentially at intervals for abutting against the inner circumferential surface of the main body.

[0013] In some embodiments, the main body is provided with a plurality of second limiting structures, the second limiting structures being used to abut against the inner sidewall of the inner cavity.

[0014] In some embodiments, the force-bearing parts are multiple and are evenly distributed circumferentially on the main body.

[0015] In some embodiments, the inner cavity is provided with a plurality of positioning posts spaced apart, and the positioning holes are adapted to the positioning posts of the molding die; the positioning holes are distributed on the main body and the connecting body, the connecting body has at least one positioning hole, and the main body has at least two positioning holes distributed circumferentially on the main body.

[0016] In some embodiments, the handheld component is provided with a rubber coating for hand gripping.

[0017] In some embodiments, the surface of the overmolded part is provided with an anti-slip structure.

[0018] In this embodiment, a composite wrench is formed by combining a metal inner core and a plastic outer shell. The metal inner core increases the overall strength of the wrench, avoiding the aging problem of traditional plastic wrenches. The force-bearing part of the metal inner core is clamped to the filter bottle ribs, thereby fixing the filter bottle and providing high-strength clamping force. The plastic outer shell covers the outside of the metal inner core, preventing the entire metal inner core from being exposed. It fits against the outer wall of the filter bottle through the locking cavity, protecting the filter bottle surface from metal scratches, while also enhancing the overall stability of the wrench and providing lightweight support. Therefore, the pre-filter disassembly wrench provided in this application, while ensuring the strength of the wrench, avoids direct metal contact with the filter bottle, preventing scratches or deformation, thereby extending the service life of the filter bottle. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 A cross-sectional view of a pre-filter removal wrench provided in some embodiments of this application;

[0021] Figure 2 This application provides a schematic diagram of the structure of the plastic housing in the pre-filter removal wrench, as shown in some embodiments.

[0022] Figure 3 A schematic diagram of the metal inner core in a pre-filter removal wrench provided for some embodiments of this application;

[0023] Figure 4 Schematic diagrams of the pre-filter disassembly wrench and filter bottle provided in some embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the structure of the pre-filter removal wrench provided in some embodiments of this application when it is in working state.

[0025] The attached figures are labeled as follows:

[0026] 1-Plastic outer shell; 2-Metal inner core; 3-Filter bottle;

[0027] 11-Shell; 12-First limiting structure; 21-Main body; 22-Connector; 23-Force-bearing part; 24-Positioning hole; 25-Second limiting structure;

[0028] 101-Inner cavity; 102-Clamping cavity; 111-Handheld part; 112-Clamping part. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. The terms "first," "second," etc., are used to distinguish different objects, not to describe a particular order or hierarchy.

[0031] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0034] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0035] In this application, "multiple" means two or more (including two).

[0036] Please refer to Figure 1 , Figure 2 and Figure 3 This application provides a pre-filter removal wrench, including a plastic shell 1 and a metal inner core 2. The plastic shell 1 has an inner cavity, and the inner circumferential surface of the plastic shell 1 forms a locking cavity 102 for fitting the outer wall of the filter bottle 3. The metal inner core 2 is fixed in the inner cavity and is provided with at least one force-bearing part 23, which is clamped to the rib of the filter bottle 3.

[0037] The plastic shell 1 is made of plastic. The interior of the plastic shell 1 has an inner cavity 101. The inner circumference of the plastic shell 1 forms a ring or semi-ring locking cavity 102. The locking cavity 102 can be designed according to the diameter of the filter bottle 3 to fit the outer contour of the filter bottle 3. The locking cavity 102 fits against the outer wall of the filter bottle 3, protecting the surface of the filter bottle 3 from metal scratches and enhancing stability. At the same time, the plastic shell 1 can provide lightweight support.

[0038] refer to Figure 1The metal inner core 2 is fixed in the inner cavity 101 of the plastic outer shell 1. The metal inner core 2 has at least one inwardly protruding force-bearing part 23. The force-bearing part 23 can be a groove, a protrusion, a toothed structure, etc. The number of force-bearing parts 23 can be one or more. The specific number and position of the force-bearing parts 23 depend on the distribution of the ribs of the filter bottle 3. The force-bearing part 23 can be completely placed in the inner cavity 101, or at least partially protruding from the inner cavity 101 into the engagement cavity 102, directly engaging with the ribs of the outer wall of the filter bottle 3. The force-bearing part 23 protruding from the engagement cavity 102 directly contacts the ribs of the filter bottle 3, forming a point-like or line-like clamping structure with the ribs of the filter bottle 3, thereby transmitting torque and preventing slippage between the wrench and the filter bottle 3 to achieve an anti-slip effect during disassembly. The metal inner core 2 can be made of stainless steel, alloy, or other metal materials to improve the overall structural strength and prevent the breakage of the handle 111 and the clamp 112.

[0039] The metal inner core 2 and the plastic outer shell 1 can be fixed in the inner cavity 101 by injection molding or by using fasteners (such as screws, clips) to ensure that the metal inner core 2 is firmly installed when under force and to avoid relative displacement between it and the plastic outer shell 1.

[0040] refer to Figure 4 and Figure 5 In this embodiment, the force-bearing portion 23 of the metal inner core 2 can precisely engage with the ribs of the filter bottle 3, providing high torque transmission capability and solving the problem of slippage in traditional wrenches. The plastic outer shell 1 wraps around the outer wall of the filter bottle 3, reducing direct contact between the metal inner core 2 and the filter bottle 3, protecting the surface of the filter bottle 3, and extending the service life of the filter bottle 3. Therefore, the plastic outer shell 1 can reduce weight and provide insulation and rust prevention, while the metal inner core 2 strengthens the key force-bearing parts, reducing the overall weight of the wrench and improving its durability.

[0041] The force-bearing parts 23 can be multiple. Optionally, multiple force-bearing parts 23 are evenly distributed circumferentially, and can simultaneously contact multiple filter bottle 3 ribs to form a multi-point clamping structure. This avoids slippage or displacement caused by uneven force at a single point, and improves stability during disassembly. In addition, the evenly distributed force-bearing parts 23 ensure that the applied torque is evenly transmitted to the filter bottle 3, reducing local stress concentration and preventing deformation or damage to the filter bottle 3. At the same time, the evenly distributed force-bearing parts 23 circumferentially allow the wrench to quickly engage the filter bottle 3 without precise alignment, reducing adjustment time, improving disassembly efficiency, and enhancing operational convenience.

[0042] The pre-filter removal wrench provided in this application embodiment adopts a composite structure combining a plastic shell 1 and a metal inner core 2, which has high strength, good weight reduction, and is easy to install and remove the pre-filter, thus improving the maintenance efficiency of the pre-filter.

[0043] In one specific embodiment, the plastic outer shell 1 includes a housing 11, which includes a handheld component 111 and a locking component 112. These components can be integrally molded by injection molding, bolted together, or snap-fitted together. The handheld component 111 and the locking component 112 are internally connected to form an inner cavity 101. The locking component 112 is fixedly installed in the inner cavity 101. The handheld component 111 is for gripping by the hand. The inner circumferential surface of the locking component 112 forms a locking cavity 102, which is a space enclosed by the inner circumferential surface of the locking component 112 for accommodating or fixing other components. The inner circumferential surface of the locking component 112 has a clearance notch to allow the force-bearing part 23 to extend from the inner cavity 101 into the locking cavity 102, achieving engagement with the external filter bottle 3. The handheld component 111 is easy to grip and operate; the locking component 112 provides a stable locking function. The integrated design of the handheld component 111 and the locking component 112 results in a compact structure, reducing assembly complexity and improving structural strength.

[0044] The plastic housing 1 can be a one-piece structure, for example, it can be integrally molded by injection molding. Alternatively, the plastic housing 1 can be a split structure. Exemplarily, the plastic housing 1 also includes a cover (not shown in the figure). The housing 11 has an inner core that can accommodate the metal inner core 2. The cover and housing 11 cooperate to form a closed space. The cover is provided with a snap or a latch, and the housing 11 is provided with a latch or a snap. The cover and housing 11 are interlocked by the snap and the latch to form a detachable fixed connection structure. Multiple snaps and latches can be provided to enhance structural stability. With this configuration, the cover and housing 11 are snapped together and fixed, allowing for manual installation or removal without tools, improving assembly and disassembly efficiency.

[0045] The metal inner core 2 includes a main body 21 and a connecting body 22. The connecting body 22 is connected to the main body 21, and the main body 21 and the connecting body 22 are fixedly connected in the inner cavity 101. Specifically, the main body 21 is fixed in the inner cavity 101 corresponding to the handheld component 111, and the connecting body 22 extends from one end of the main body 21 and protrudes into the inner cavity 101 corresponding to the locking component 112 so as to cooperate with the inner cavity 101 of the handheld component 111. The main body 21 and the connecting body 22 are fixed in the inner cavity of the handheld component 111 by interference fit, mechanical locking, etc., to prevent loosening between the metal inner core 2 and the plastic outer shell 1, and to ensure the reliability and stability of long-term use.

[0046] To achieve a good fit with the outer wall of the filter bottle 3, the main body 21 may optionally have a semi-circular structure. Correspondingly, the inner cavity 101 of the clip 112 is also a semi-circular cavity, and the inner cavity 101 is provided with a plurality of circumferentially spaced first limiting structures 12, such as... Figure 1As shown, the first limiting structure 12 can be a groove formed by the body 21 recessed towards the inner cavity. During assembly, the first limiting structure 12 at each location abuts against the inner circumferential surface of the body 21, thereby limiting the body 21. The connecting body 22 can be fixed to the inner cavity 101 of the handheld part 111 by a limiting post or a locking member.

[0047] Furthermore, the main body 21 is provided with multiple second limiting structures 25. The second limiting structures can be protrusions as shown in the figure, such as arc-shaped protrusions, rectangular protrusions, trapezoidal protrusions, etc., which can abut against the inner wall of the inner cavity 101. In this way, the first limiting structure abuts against the inner circumferential surface of the main body 21, and the second limiting structure 25 abuts against the inner wall of the inner cavity 101. The second limiting structure 25 can form a limiting structure with the first limiting structure acting in opposite directions. By distributing the force evenly at multiple circumferential points, it can buffer vibration or impact, prevent the main body 21 of the metal inner core 22 from deflecting or shaking, and improve the positioning accuracy between it and the filter bottle 3.

[0048] To improve the molding accuracy of the wrench, it is necessary to ensure the positioning accuracy between the molding die and the metal core 2. In this embodiment, multiple positioning holes 24 are opened at intervals on the metal core 2. The positioning holes 24 are coaxially engaged with the positioning posts of the molding die. Before injection molding, the metal core 2 is placed in the correct position to ensure that the installation position of the metal core 2 and the molding die is accurate, avoiding misalignment or offset, thereby ensuring the subsequent injection molding accuracy.

[0049] Optionally, positioning holes are distributed on the main body 21 and the connecting body 22. The connecting body 22 has at least one positioning hole 24, and the main body 21 has at least two positioning holes 24, circumferentially distributed on the main body 21. In this way, the positioning holes 24 are distributed on the two different structures, the main body 21 and the connecting body 22, achieving multi-point support positioning. This effectively prevents the metal core 2 from rotating or shifting during injection molding, and from warping or deforming due to uneven force during molding. This ensures the flatness of the metal core 2, reduces the risk of deformation, improves the molding quality of the disassembly wrench, and simplifies the operation steps and improves production efficiency.

[0050] It should be noted that the number and spacing of the positioning holes 24 in this application can be adjusted according to actual needs to adapt to metal cores 2 of different sizes or structures, and this application does not limit this.

[0051] To facilitate hand gripping, a rubber-coated part can be provided on the outside of the hand-held part 111. The rubber-coated part can be made of rubber or silicone material. The rubber-coated part can be fitted, embedded or fixed on the outside of the hand-held part 111 to increase the friction between the hand and the hand and prevent the hand from slipping.

[0052] Furthermore, the surface of the rubber-coated part is provided with anti-slip texture, which can be anti-slip grooves, anti-slip protrusions or anti-slip patterns. By setting anti-slip texture on the surface of the rubber-coated part, the friction can be further increased, preventing the metal inner core 2 from loosening or falling off during use and improving the stability during disassembly.

[0053] The foregoing has provided a detailed description of the pre-filter removal wrench provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A pre-filter removal wrench, characterized in that, include: A plastic shell (1) has an inner cavity (101) inside, and a locking cavity (102) is formed around the inner circumferential surface of the plastic shell (1). The locking cavity (102) is used to fit the outer wall of the filter bottle (3). A metal inner core (2) is fixed in the inner cavity (101). The metal inner core (2) is provided with at least one force-bearing part (23), which is used to hold the rib of the filter bottle (3).

2. The pre-filter removal wrench according to claim 1, characterized in that, The plastic shell (1) includes a shell (11), the shell (11) includes a handheld part (111) and a locking part (112), the handheld part (111) is fixedly connected to the locking part (112), the interior of the handheld part (111) and the locking part (112) are connected to form the inner cavity (101), the inner peripheral surface of the locking part (112) surrounds the locking cavity (102), and the inner peripheral surface of the locking part (112) is provided with at least one clearance notch so that the force-bearing part (23) can extend from the inner cavity (101) to the locking cavity (102).

3. The pre-filter removal wrench according to claim 2, characterized in that, The plastic shell (1) is a one-piece injection molded plastic shell.

4. The pre-filter removal wrench according to claim 2 or 3, characterized in that, The metal core (2) includes a main body (21) and a connector (22), the connector (22) being connected to the main body (21), and the main body (21) and the connector (22) being fixedly connected to the inner cavity (101).

5. The pre-filter removal wrench according to claim 4, characterized in that, The inner cavity (101) is a semi-circular inner cavity, and the main body (21) is a semi-circular main body. The inner cavity (101) is provided with a plurality of first limiting structures (12) distributed circumferentially, which are used to abut against the inner circumferential surface of the main body (21).

6. The pre-filter removal wrench according to claim 4, characterized in that, The main body (21) is provided with a plurality of second limiting structures (25), which are used to abut against the inner wall of the inner cavity (101).

7. The pre-filter removal wrench according to claim 4, characterized in that, The force-bearing parts (23) are multiple and are evenly distributed circumferentially on the main body (21).

8. The pre-filter removal wrench according to claim 4, characterized in that, The metal core (2) has a plurality of positioning holes (24) spaced apart, the positioning holes (24) being adapted to the positioning posts of the forming mold; the positioning holes (24) are distributed on the main body (21) and the connecting body (22), the positioning holes (24) on the connecting body (22) are at least one, and the positioning holes (24) on the main body (21) are at least two and are circumferentially distributed on the main body (21).

9. The pre-filter removal wrench according to claim 2, characterized in that, The handheld component (111) is provided with a rubber-coated part for hand gripping.

10. The pre-filter removal wrench according to claim 9, characterized in that, The surface of the coated part is provided with an anti-slip structure.

Images