Filter element installer for excrement detection tube

Abstract

The invention provides an excrement detection tube filter element installer which comprises a base, a sleeve is connected to the top face of the base, a stepped core rod extends upwards from the center of the bottom face of the sleeve, a compression spring is installed on the stepped core rod, and a guide movable sleeve is installed between the stepped core rod and the inner wall of the sleeve. The outer diameter of the guide movable sleeve is matched with the inner diameter of the sleeve, the inner diameter of the guide movable sleeve is matched with the outer diameter of the lower portion of the stepped core rod, the outer diameter of the top face of the stepped core rod, the outer diameter of the lower portion of the filter element and the inner diameter of the top end of the guide movable sleeve are matched, and the stepped core rod, the guide movable sleeve and the sleeve are concentrically arranged. The press-fitting device is easy to operate, accurate and in-place in press-fitting and high in filter element mounting efficiency.

Description

Technical Field

[0001] This invention relates to the field of medical testing consumables and tooling technology, and in particular to a stool testing tube filter cartridge installer. Background Technology

[0002] Existing stool detection tube structures, such as Figure 1 and Figure 2 As shown, it includes a detection tube a and a filter element b. The detection tube a has a double-stepped hole, which consists of a first mounting hole a1, a second mounting hole a2, and a third mounting hole a3 from bottom to top. The upper part of the filter element b is installed in the third mounting hole a3, and the lower part of the filter element b is installed in the second mounting hole a2.

[0003] The installation of the filter cartridge in the stool test tube relies entirely on three manual steps: tweezers, alignment, and finger pressure. This has the following drawbacks: 1. The filter element has an outer diameter of Φ3.9 mm and a thickness of 10 mm. It is soft and easily warped, making it difficult to keep level by hand. It is prone to tilting and folding when pressed in, resulting in improper installation. 2. The filter element edges are sheared by the welded body ports, generating debris that blocks the flow channels; 3. The sealing step was not completely covered, and leakage occurred during the subsequent air tightness test at -60kPa. 4. High rework rate, average installation time per unit is 25 seconds, and the yield rate is only 92%; 5. The operator's fingers are repeatedly exerted with force for a long time (>500 times / shift), which is not in line with ergonomics; 6. If the contact area between the tweezers tip and the filter element is less than 5 mm², the unit pressure will be too high, leaving indentations on the filter element surface and affecting the appearance inspection. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to provide a stool detection tube filter cartridge installer that is simple to operate, provides precise pressing, and offers high filter cartridge installation efficiency.

[0005] The technical solution of this invention is a stool detection tube filter cartridge installer, characterized in that: it includes a base, a sleeve connected to the top surface of the base, a stepped core rod extending upward from the center of the bottom surface of the sleeve, a compression spring installed on the stepped core rod, a guide sleeve installed between the stepped core rod and the inner wall of the sleeve, the outer diameter of the guide sleeve being adapted to the inner diameter of the sleeve, the inner diameter of the guide sleeve being adapted to the lower outer diameter of the stepped core rod, the outer diameter of the top surface of the stepped core rod, the lower outer diameter of the filter cartridge, and the inner diameter of the top surface of the guide sleeve being adapted to each other, and the stepped core rod, the guide sleeve, and the sleeve being concentrically arranged; under normal conditions, the height of the top surface of the guide sleeve is higher than the height of the top surface of the stepped core rod, the filter cartridge is placed vertically on the top surface of the stepped core rod and the outer side of the filter cartridge is limited by the inner side of the top surface of the guide sleeve; when pressing down, the detection tube is held vertically from top to bottom and pressed in, the top surface of the guide sleeve contacts the step of the detection tube and moves downward against the compression spring, the top surface of the stepped core rod inserts the filter cartridge into the stepped center hole of the detection tube.

[0006] Preferably, the stepped mandrel includes a lower large-diameter section and an upper small-diameter section, and the compression spring is installed on the top surface of the large-diameter section; the guide sleeve is a stepped sleeve shape, including a lower guide section and an upper positioning section, the inner diameter of the guide section of the guide sleeve is adapted to the outer diameter of the large-diameter section of the stepped mandrel, and the inner diameter of the positioning section of the guide sleeve is adapted to the outer diameter of the small-diameter section of the stepped mandrel; the bottom surface of the compression spring contacts and limits the top surface of the large-diameter section, and the top surface of the compression spring contacts and limits the bottom surface of the guide section.

[0007] Preferably, a limiting block extends inward from the top of the inner wall of the sleeve, and the guide section sidewall of the guide movable sleeve is provided with an elongated groove penetrating the top and bottom surfaces, the cross-sectional shape of the elongated groove corresponding to the cross-sectional shape of the limiting block.

[0008] Preferably, the base has a mounting hole at the center of its top surface, and the bottom of the sleeve is inserted into the mounting hole from top to bottom for fixation.

[0009] This invention employs a dual-guide system to ensure the filter element is level, without skewing or folding; the pressing force range is consistent with the technical conditions of the fecal detection tube, preventing filter element collapse or tube deformation; the limiting structure ensures consistent filter element height, increasing the subsequent airtightness pass rate from 92% to 99.5%; it can be operated with one hand, with a speed of 1.5 seconds per piece, significantly improving efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the product structure of the detection tube in this invention; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 This is a schematic diagram of the structure of the present invention under normal conditions; Figure 4This is the front view of the present invention; Figure 5 for Figure 4 A cross-sectional view along the AA direction; Figure 6 This is a schematic diagram of the structure of the present invention under extrusion conditions; Figure 7 for Figure 6 The main view; Figure 8 for Figure 7 A cross-sectional view along the BB direction; Figure 9 for Figure 8 A schematic diagram of the structure when the detection tube is loaded; Wherein: a—detection tube; a1—first mounting hole; a2—second mounting hole; a3—third mounting hole; b—filter element; 1—base; 2—sleeve; 21—stepped core rod; 211—large diameter section; 212—small diameter section; 22—limiting block; 3—compression spring; 4—guide movable sleeve; 41—guide section; 411—long groove; 42—positioning section. Detailed Implementation

[0011] The present invention will now be described in further detail with reference to the accompanying drawings.

[0012] like Figures 1 to 9 As shown, this invention provides a stool detection tube filter cartridge installer, characterized by: a base 1, a sleeve 2 connected to the top surface of the base 1, a stepped core rod 21 extending upward from the center of the bottom surface of the sleeve 2, a compression spring 3 mounted on the stepped core rod 21, a guide sleeve 4 installed between the stepped core rod 21 and the inner wall of the sleeve 2, the outer diameter of the guide sleeve 4 being adapted to the inner diameter of the sleeve 2, the inner diameter of the guide sleeve 4 being adapted to the lower outer diameter of the stepped core rod 21, and the outer diameter of the top surface of the stepped core rod 21 being adapted to the lower outer diameter of the filter cartridge b. The inner diameter of the top of the guide sleeve 4 is compatible with the diameter of the guide sleeve 4. The stepped core rod 21, the guide sleeve 4, and the sleeve 2 are arranged concentrically. Under normal conditions, the top surface of the guide sleeve 4 is higher than the top surface of the stepped core rod 21. The filter element b is placed vertically on the top surface of the stepped core rod 21 and the outer side of the filter element b is limited by the inner side of the top of the guide sleeve 4. When pressing down, the test tube a is held vertically from top to bottom and pressed in. The top of the guide sleeve 4 contacts the step of the test tube a and moves downward against the compression spring 3. The top surface of the stepped core rod 21 inserts the filter element b into the stepped center hole of the test tube a.

[0013] Specifically, the stepped core rod 21 includes a lower large-diameter section 211 and an upper small-diameter section 212, and the compression spring 3 is installed on the top surface of the large-diameter section 211; the guide sleeve 4 is a stepped sleeve shape, including a lower guide section 41 and an upper positioning section 42. The inner diameter of the guide section 41 of the guide sleeve 4 is adapted to the outer diameter of the large-diameter section 211 of the stepped core rod 21, and the inner diameter of the positioning section 42 of the guide sleeve 4 is adapted to the outer diameter of the small-diameter section 212 of the stepped core rod 21; the bottom surface of the compression spring 3 contacts and limits the top surface of the large-diameter section 211, and the top surface of the compression spring 3 contacts and limits the bottom surface of the guide section 41.

[0014] Specifically, a limiting block 22 extends inward from the top of the inner wall of the sleeve 2, and the guide section 41 of the guide sleeve 4 is provided with a long groove 411 penetrating the top and bottom surfaces. The cross-sectional shape of the long groove 411 corresponds to the cross-sectional shape of the limiting block 22. When the guide sleeve 4 needs to be disassembled, rotate the guide sleeve 4 until the long groove 411 is aligned with the limiting block 22, and pull the guide sleeve 4 upward to remove it. During normal operation, after the guide sleeve 4 is installed, rotate it at an angle so that the long groove 411 and the limiting block 22 are offset by an angle. After the guide sleeve 4 moves upward, it contacts the top surface of the guide section 41 of the guide sleeve 4 through the limiting block 22 and is limited, preventing the guide sleeve 4 from falling out.

[0015] Specifically, the base 1 has a mounting hole at the center of its top surface, and the sleeve 2 is inserted into the mounting hole from top to bottom for fixation.

[0016] The working principle of this invention is as follows: Under normal circumstances Figures 3 to 5 As shown, the guide sleeve 4 is pushed upward under the action of the compression spring 3. The top surface of the guide section 41 of the guide sleeve 4 contacts the limiting block 22 to limit it and prevent the guide sleeve 4 from falling out. At this time, the top surface of the positioning section 42 of the guide sleeve 4 is higher than the top surface of the small diameter section 212 of the stepped core rod 21. The filter element b is placed with its bottom facing down on the top surface of the small diameter section 212 of the stepped core rod 21. The outer side of the filter element b is limited by the inner side wall of the positioning section 42 of the guide sleeve 4 to maintain a vertical state.

[0017] Hold the test tube a and align it with the pre-positioned filter element b, then insert it vertically. Figure 9As shown, while the detection tube a is pressed down, the first mounting hole a1 of the detection tube a contacts the top surface of the positioning section 42 of the guide sleeve 4 for limitation. As the detection tube a continues to be pressed down, the guide sleeve 4 overcomes the elastic force of the compression spring 3 and moves downwards synchronously until the filter element b is completely pressed into the second mounting hole a2 and the third mounting hole a3 of the detection tube a. The upper outer surface of the filter element b is press-fitted with the third mounting hole a3, and the lower outer surface of the filter element b is press-fitted with the second mounting hole a2, achieving rapid and precise insertion of the filter element b. After the detection tube a is removed upwards, the guide sleeve 4 returns to its original position under the elastic force of the compression spring 3.

[0018] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A stool detection tube filter cartridge installer, characterized in that: Includes a base (1), the top surface of which is connected to a sleeve (2), a stepped core rod (21) extending upward from the center of the bottom surface of the sleeve (2), a compression spring (3) installed on the stepped core rod (21), a guide sleeve (4) installed between the stepped core rod (21) and the inner wall of the sleeve (2), the outer diameter of the guide sleeve (4) being adapted to the inner diameter of the sleeve (2), the inner diameter of the guide sleeve (4) being adapted to the lower outer diameter of the stepped core rod (21), and the outer diameter of the top surface of the stepped core rod (21), the lower outer diameter of the filter element (b), and the inner diameter of the top surface of the guide sleeve (4) being... The stepped core rod (21), the guide sleeve (4), and the sleeve (2) are arranged concentrically. Under normal conditions, the top surface of the guide sleeve (4) is higher than the top surface of the stepped core rod (21). The filter element (b) is placed vertically on the top surface of the stepped core rod (21), and the outer side of the filter element (b) is limited by the inner side of the top of the guide sleeve (4). When pressing down, the hand holds the detection tube (a) and presses it vertically from top to bottom. The top of the guide sleeve (4) contacts the step of the detection tube (a) and moves downward against the compression spring (3). The top surface of the stepped core rod (21) inserts the filter element (b) into the stepped center hole of the detection tube (a).

2. The stool detection tube filter cartridge installer according to claim 1, characterized in that: The stepped core rod (21) includes a lower large-diameter section (211) and an upper small-diameter section (212). The compression spring (3) is installed on the top surface of the large-diameter section (211). The guide sleeve (4) is a stepped sleeve shape, including a lower guide section (41) and an upper positioning section (42). The inner diameter of the guide section (41) of the guide sleeve (4) is adapted to the outer diameter of the large-diameter section (211) of the stepped core rod (21). The inner diameter of the positioning section (42) of the guide sleeve (4) is adapted to the outer diameter of the small-diameter section (212) of the stepped core rod (21). The bottom surface of the compression spring (3) contacts and limits the top surface of the large-diameter section (211). The top surface of the compression spring (3) contacts and limits the bottom surface of the guide section (41).

3. The stool detection tube filter cartridge installer according to claim 2, characterized in that: The top of the inner wall of the sleeve (2) extends inward to form a limiting block (22). The guide section (41) of the guide sleeve (4) is provided with a long groove (411) that runs through the top and bottom surfaces. The cross-sectional shape of the long groove (411) corresponds to the cross-sectional shape of the limiting block (22).

4. The stool detection tube filter cartridge installer according to claim 1, characterized in that: The base (1) has an installation hole at the center of its top surface, and the sleeve (2) is inserted into the installation hole from top to bottom for fixation.

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