Drain strainer
The drain strainer with a spiral metal annular member and integrated strainer design addresses slow drainage and inadequate capture issues, providing efficient debris removal and secure attachment under strong water flow.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- NANJING BREADFRUIT TREE NETWORK TECHNOLOGY CO LTD
- Filing Date
- 2026-05-01
- Publication Date
- 2026-06-29
AI Technical Summary
Conventional drain outlet covers experience slow drainage, water pooling, and inadequate garbage capture under strong water flow due to a flat surface structure and loose fitting nets.
A drain strainer comprising a metal annular member with a spiral surface and high-precision flat edge, integrated with a strainer formed by plastic ring and net, using thermoplastic elastomer support points for secure attachment, ensuring smooth drainage and effective debris capture.
Enhances drainage speed, prevents component movement and leakage, ensures reliable debris capture, and facilitates easy replacement, maintaining hygiene and reducing maintenance effort.
Smart Images
Figure 0003256407000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a garbage receiver for a drain outlet, and particularly to a garbage receiver for a drain outlet installed in a bathroom washbasin or the like, which efficiently captures garbage such as hair and improves drainage performance and member stability.
Background Art
[0002] Conventionally, a garbage receiver for capturing garbage such as hair flowing along with drainage has been installed at the bathroom drain outlet. Since the surface of the conventional drain outlet cover (metal ring) has a flat structure, there is a problem that the drainage passing speed is slow and water pools around the drain outlet. Further, when a replacement garbage net is attached to this type of drain outlet cover, there is a problem that when a strong water flow acts during use, the internal net moves due to the water flow and cannot sufficiently capture the flowing garbage.
Summary of the Invention
Problems to be Solved by the Invention
[0003] The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide an inexpensive and highly reliable garbage receiver for a drain outlet that smoothly circulates drainage, does not cause member movement or net floating even under strong water flow, and has excellent garbage capture performance and recovery workability.
Means for Solving the Problems
[0004] In order to solve the above problems, the garbage receiver for a drain outlet according to the present invention adopts the following configuration. That is, it includes a metal annular member (1) and a strainer (2) attached to the metal annular member (1). The metal annular member (1) has a spiral-shaped surface that flows toward the central hole, thereby reducing the resistance to drainage flow and smoothly guiding wastewater containing debris towards the center. Furthermore, by setting a large depth for the contact surface portion (3) with the drain opening, the tight seal with the drain opening is enhanced, suppressing the lifting of the strainer (2) installed inside. In addition, the outer edge portion (4) of the metal annular member (1) is formed into an annular flat surface and is finished with high precision by machining (CNC machining), so when set in a floor drain opening, the edge fits tightly against the edge of the drain opening, preventing displacement under strong water flow and preventing water leakage from gaps in the edge.
[0005] On the other hand, the strainer (2) is formed by integrally integrating a plastic ring (5) and a net member (6) by integral injection molding or ultrasonic welding, thereby allowing drainage to pass through smoothly while reliably capturing only debris within the net member (6). Furthermore, four support points (7) are provided on the edge of the plastic ring (5) at equal intervals in the circumferential direction, and these support points (7) are made of thermoplastic elastomer (TPE). This eliminates problems such as excessive fitting force or looseness when attaching the strainer (2) to the metal annular member (1), and provides appropriate tightening force and cushioning effect. [Effects of the Invention]
[0006] According to the drain strainer of this invention, the following remarkable effects can be obtained. (1) The spiral surface of the metal annular member improves the drainage speed, allowing wastewater containing debris to flow smoothly. (2) The increased depth of the contact surface and the flat ring shape of the outer edge, along with the high-precision finish achieved by machining (CNC machining), improve the seal to the drain outlet, preventing the component from moving or leaking even under strong water flow. (3) The strainer can be manufactured at low cost by integral injection molding or ultrasonic welding, and reliably captures debris without obstructing drainage. When cleaning, the entire strainer can be replaced and discarded, making it hygienic and reducing the workload. (4) The thermoplastic elastomer pivot point on the edge of the plastic ring provides adequate holding force and cushioning for the strainer, preventing it from moving due to the water flow, while also allowing for easy attachment and detachment. [Brief explanation of the drawing]
[0007] [Figure 1] This is an exploded perspective view of the metal annular member and the strainer. [Figure 2] This is a plan view of a metal annular member. [Figure 3] This is a bottom view of a metal annular member. [Figure 4] This is a front view of a metal annular member. [Figure 5] This is a rear view of a metal annular member. [Figure 6] This is a schematic diagram of a metal annular member. [Figure 7] These are front and side views of the strainer. [Figure 8] This is a perspective view of a drain strainer. [Modes for carrying out the invention]
[0008] The embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to these embodiments.
[0009] As shown in Figures 1 and 8, the drain strainer of this embodiment consists of a metal annular member (1) and a strainer (2) that is detachably held by the metal annular member (1). The metal annular member (1) is made of a metal such as stainless steel, and as shown in Figure 2, its upper surface (water receiving surface) has a spiral-shaped curved surface that continuously slopes downward toward the central hole. As a result, the drainage is concentrated toward the center without creating a vortex. In addition, the depth (axial length) of the contact surface portion (3) that abuts against the receiving edge of the drain opening is made large, which increases the fitting depth into the drain opening and provides a stable mounting state. Furthermore, the outer peripheral edge portion (4) of the metal annular member (1) is formed in a flat ring shape, and dimensional accuracy and surface smoothness are enhanced by high-precision finishing by machining (CNC machining).
[0010] As shown in Figure 7, the strainer (2) has a plastic ring (5) and a bag-shaped net member (6) fixed to the plastic ring (5). The plastic ring (5) is made of a soft resin composition containing polyethylene (PE) and thermoplastic elastomer (TPE), and the net member (6) is made of synthetic resin fibers or natural fibers. The plastic ring (5) and the net member (6) are firmly integrated by integral injection molding or ultrasonic welding, so that peeling or movement of the net member does not occur during use.
[0011] Four support points (7) are provided protruding from the outer edge of the plastic ring (5) at equal intervals in the circumferential direction. These support points (7) are made of thermoplastic elastomer (TPE) alone or a soft material mainly composed of TPE, and abut against the inner surface of the metal annular member (1). As a result, even if there is a small clearance between the metal annular member (1) and the plastic ring (5), the support points (7) elastically deform, generating an appropriate clamping force and holding the ring securely without any looseness. At the same time, since excessive fitting force is not required, attachment and detachment are easy.
[0012] To use the strainer, insert the strainer (2) from above the metal annular member (1), and set the entire metal annular member (1) into the drain outlet with the pivot point (7) of the plastic ring (5) elastically in contact with the inner circumferential surface of the metal annular member (1). As the wastewater flows down, it is guided smoothly into the strainer (2) by the spiral surface, and debris is captured by the net member (6), allowing only water to pass through. Even with a strong water flow, the high adhesion between the deep contact surface (3) and the outer edge (4) of the metal annular member (1) prevents displacement or water leakage, and the lifting of the strainer (2) is also prevented by the buffering action of the pivot point (7) and the shape of the metal annular member (1). When debris accumulates, simply pull the strainer (2) upwards, discard it, and replace it with a new strainer (2). [Explanation of symbols]
[0013] (1) Metal ring member (2) Strainer (3) Contact surface (4) Outer edge portion (flat ring-shaped portion) (5) Plastic ring (6) Net components (7) Pivot point (made of thermoplastic elastomer)
Claims
1. A drain strainer that is installed in a drain, The device comprises a metal annular member (1) and a strainer (2) that is detachably attached to the metal annular member (1). The aforementioned metal annular member (1) is The surface is formed in a spiral pattern toward the central hole, The axial depth of the contact surface (3) with the drain is set to be large. A drain strainer characterized in that its outer peripheral edge (4) is formed in a flat ring shape all around, and the outer peripheral edge (4) is subjected to high-precision finishing by machining (CNC machining).
2. The aforementioned strainer (2) is It has a plastic ring (5) and a net member (6) fixed to the plastic ring (5), The drain strainer according to claim 1, wherein the plastic ring (5) and the net member (6) are integrated by either injection molding or ultrasonic welding.
3. Four support points (7) are provided on the edge of the plastic ring (5) at equal intervals in the circumferential direction. The aforementioned support point (7) is made of thermoplastic elastomer (TPE), as described in claim 2.
4. The aforementioned metal annular member (1) is made of metal. The drain strainer according to any one of claims 1 to 3, wherein the plastic ring (5) of the strainer (2) is made of a soft resin composition containing polyethylene (PE) and thermoplastic elastomer (TPE), and the net member (6) is made of synthetic resin fibers or natural fibers.