Knob type flexible pressing device for needle core

Abstract

The utility model discloses a knob type flexible pressing device for a needle core, and relates to the technical field of pressing devices. The rotary knob comprises a rotary knob body, wherein a groove is formed in one end of the rotary knob body; the rotary knob comprises a rotary knob body, an annular plate located on one side of the rotary knob body, an arc-shaped plate is fixedly matched with the outer side wall of the annular plate, an L-shaped rod is elastically and slidably matched with the outer side wall of the arc-shaped plate, a threaded rod is fixedly matched with one end of the L-shaped rod, and a cleaning roller is in threaded fit with one end of the threaded rod. And the lower end part of the cleaning roller is matched with the interior of the groove. According to the utility model, through the arrangement of the cleaning roller, one end of the cleaning roller slides in and out of the groove under the action of the L-shaped rod, and dust attached to the inner side wall of the groove is cleaned through the lower end part of the cleaning roller, so that the problem that dust is attached to the inner side wall of the groove is reduced, and the cleanliness of the knob body during use is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of compression device, concretely relates to a knob formula needle core flexible compression device. BACKGROUND

[0002] In recent years, automatic samplers have been popularized in China. Most chromatography manufacturers, laboratories and third-party inspection have equipped automatic samplers. Automatic sampling needles, as the core components of automatic samplers, are also widely used. However, the sampling needle is expensive and consumable. After long-term use, sample residues can affect the reproducibility of sampling. Therefore, it needs to be replaced regularly. If the sampling needle is not replaced due to the expiration of the service life, it will cause additional economic losses to the user.

[0003] The patent application with the publication number CN113916583B discloses a knob formula needle core flexible compression device. The specification paragraph 0029 discloses that the user pre-presses the spring by cooperating with the screw and spring support sleeve, so that the needle core knob is always pressed on the rack housing. In the initial state, the end face of the needle core knob is the compression piece facing the needle core compression port. After the fine needle core is inserted into the rack housing through the needle core compression port, the needle core knob is rotated, and the compression piece is pressed in the groove of the needle core. The chamfer of the compression piece is larger than the groove of the needle core, which prevents the needle core from sliding due to the resistance and affects the extraction accuracy. The rotatable angle of the needle core knob is determined by the limiting piece and the two ends of the compression piece. When the needle core is compressed, it is in the position without inclination of the compression piece, which prevents the needle core from moving for a long time to cause the knob to loosen and reduce the extraction accuracy. When the round handle sampling needle needs to be compressed, the clamping compression head is compressed through the compression piece, and then the round handle is clamped into the detachable expansion block through the clamping groove. The above is the working process of the whole invention, and the step can be repeated next time.

[0004] However, in actual use, when the knob body is used, the inside of one end of the knob body is not provided with a cleaning structure, which can easily cause dust to adhere to the inside of one end of the knob body. If the dust adhering to one end of the knob body is not cleaned in time, it will affect the cleanliness of the knob body during use.

[0005] Therefore, a knob formula needle core flexible compression device is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0006] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a knob formula needle core flexible compression device.

[0007] To solve the above technical problems, the basic idea of the technical scheme of the utility model is:

[0008] A knob type needle core flexible compression device, comprising a knob body, a groove is formed in one end of the knob body;

[0009] An annular plate is located on one side of the knob body, an outer side wall of the annular plate is fixedly matched with an arc-shaped plate, an outer side wall of the arc-shaped plate is elastically and slidingly matched with an L-shaped rod, one end of the L-shaped rod is fixedly matched with a threaded rod, one end of the threaded rod is threadedly matched with a cleaning roller, and a lower end of the cleaning roller is matched with the inside of the groove.

[0010] Optionally, two connecting rods are fixedly matched between the outer side wall of the annular plate and the inner side wall of the arc-shaped plate, and an arc-shaped block is fixedly matched with the outer side wall of the arc-shaped plate.

[0011] Optionally, a guide hole is formed in one side of the arc-shaped block, and the L-shaped rod is slidingly matched in the inside of the guide hole.

[0012] Optionally, a spring is fixedly matched between one side of the arc-shaped block and the L-shaped rod, and the spring is sleeved on the circumferential side of the L-shaped rod.

[0013] Optionally, a positioning disc is fixedly matched with one end of the L-shaped rod, and a rubber pad is fixedly matched with the circumferential side of the other end of the L-shaped rod.

[0014] Optionally, a threaded hole is formed in the upper end of the cleaning roller, and one end of the threaded rod is threadedly matched in the inside of the threaded hole.

[0015] Optionally, a plurality of brushes are fixedly matched with the outer side wall of the cleaning roller, and one end of the brush is matched with the inner side wall of the groove.

[0016] Optionally, a plurality of anti-skid convex patterns are fixedly matched with the outer side wall of one end of the knob body, a compression piece is fixedly matched with the other end of the knob body, and the compression piece is located between the annular plate and the arc-shaped plate.

[0017] After the above technical scheme is adopted, the present application has the following advantages compared with the prior art, of course, any product implementing the present application does not necessarily need to achieve all the advantages described below:

[0018] The cleaning roller is arranged, so that one end of the cleaning roller slides in and out of the groove under the action of the L-shaped rod, and the dust attached to the inner side wall of the groove is cleaned through the lower end of the cleaning roller, thereby reducing the problem of dust attachment to the inner side wall of the groove and improving the cleanliness of the knob body during use.

[0019] The guide hole is arranged to make the L-shaped rod slide inside the guide hole under the action of the rubber pad and guide the sliding direction of the L-shaped rod through the guide hole, thereby reducing the problem of inclination of the L-shaped rod during sliding and improving the stability of the L-shaped rod during sliding.

[0020] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings. In the drawings

[0022] In the drawings:

[0023] Figure 1 is a schematic diagram of the perspective structure of an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the bottom structure of an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of the cleaning roller structure of an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of the annular plate structure of an embodiment of the present application.

[0027] In the drawings, the component list represented by each reference numeral is as follows:

[0028] Knob body 100, anti-skid convex 101, groove 102, compression piece 103, annular plate 200, arc plate 201, connecting rod 202, arc block 203, guide hole 204, L-shaped rod 205, spring 206, positioning disc 207, rubber pad 208, threaded rod 209, cleaning roller 210, threaded hole 211.

[0029] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0030] The present application will now be further described in detail with reference to the accompanying drawings.

[0031] Please refer to Figures 1-4 shown in the present embodiment, a knob type needle core flexible compression device is provided, which comprises a knob body 100, one end of the knob body 100 is provided with a groove 102;

[0032] The annular plate 200 is located on one side of the knob body 100, the outer side wall of the annular plate 200 is fixedly matched with the arc-shaped plate 201, the outer side wall of the arc-shaped plate 201 is elastically and slidingly matched with the L-shaped rod 205, one end of the L-shaped rod 205 is fixedly matched with the threaded rod 209, one end of the threaded rod 209 is threadedly matched with the cleaning roller 210, and the lower end of the cleaning roller 210 is matched with the inside of the groove 102.

[0033] Working principle:

[0034] Firstly, the annular plate 200 is placed on one side of the knob body 100, then the upper end of the cleaning roller 210 is threadedly matched on the lower end of the threaded rod 209, then the L-shaped rod 205 is slid downward, the L-shaped rod 205 drives the cleaning roller 210 to slide downward through the threaded rod 209, and the dust inside the groove 102 is cleaned through the lower end of the cleaning roller 210, thereby reducing the problem of dust adhering to the inner side wall of the groove 102.

[0035] The cleaning roller 210 is arranged, so that one end of the cleaning roller 210 slides in and out of the groove 102 under the action of the L-shaped rod 205, and the dust adhering to the inner side wall of the groove 102 is cleaned through the lower end of the cleaning roller 210, thereby reducing the problem of dust adhering to the inner side wall of the groove 102 and improving the cleanliness of the knob body 100 in use.

[0036] To make the L-shaped rod 205 of the embodiment more stable during sliding on one side of the arc-shaped block 203, the following structure is used for improvement, as shown in the drawings. Figures 1-4 The outer side wall of the annular plate 200 and the inner side wall of the arc-shaped plate 201 are fixedly matched with two connecting rods 202, the outer side wall of the arc-shaped plate 201 is fixedly matched with the arc-shaped block 203, the arc-shaped block 203 is provided with a guide hole 204 on one side, the L-shaped rod 205 is slidingly matched in the guide hole 204, the arc-shaped block 203 is fixedly matched with the spring 206 between one side and the L-shaped rod 205, the spring 206 is sleeved on the circumferential side of the L-shaped rod 205, the L-shaped rod 205 is fixedly matched with the positioning disc 207 at one end, the circumferential side of the other end of the L-shaped rod 205 is fixedly matched with the rubber pad 208, the upper end of the cleaning roller 210 is provided with a threaded hole 211, one end of the threaded rod 209 is threadedly matched in the threaded hole 211, a plurality of brushes are uniformly fixedly matched on the outer side wall of the cleaning roller 210, one end of the brush is matched with the inner side wall of the groove 102, a plurality of anti-skid convex patterns 101 are uniformly fixedly matched on the outer side wall of one end of the knob body 100, the other end of the knob body 100 is fixedly matched with the pressing member 103, and the pressing member 103 is located between the annular plate 200 and the arc-shaped plate 201.

[0037] In use, the annular plate 200 is placed on one side of the knob body 100, the upper end of the cleaning roller 210 is screwed on the lower end of the threaded rod 209 through the threaded hole 211, then the rubber pad 208 is slid downward, the L-shaped rod 205 is slid in the guide hole 204 and compresses the spring 206, the L-shaped rod 205 drives the cleaning roller 210 to slide downward through the threaded rod 209, the cleaning roller 210 drives the brush to clean the dust adhered to the inner side wall of the groove 102, and the problem of dust adhered to the inner side wall of the groove 102 is reduced.

[0038] The guide hole 204 is arranged, so that the L-shaped rod 205 slides in the guide hole 204 under the action of the rubber pad 208, and the sliding direction of the L-shaped rod 205 is guided through the guide hole 204, the problem that the L-shaped rod 205 is inclined when sliding is reduced, and the stability of the L-shaped rod 205 when sliding is improved.

[0039] The utility model is not limited to the above-mentioned embodiment, any person should know the structural change made under the inspiration of the utility model, and any technical scheme with the same or similar utility model falls into the protection scope of the utility model. The utility model does not describe the technology, shape and structure part in detail, which is the known technology.

Claims

1. A knobbed needle core flexible compression device, characterized by, Include: The knob body (100), one end of the knob body (100) is provided with a groove (102); The annular plate (200) is located on one side of the knob body (100), the outer side wall of the annular plate (200) is fixedly connected with the arc-shaped plate (201), the outer side wall of the arc-shaped plate (201) is elastically and slidingly connected with the L-shaped rod (205), one end of the L-shaped rod (205) is fixedly connected with the threaded rod (209), one end of the threaded rod (209) is threadedly connected with the cleaning roller (210), and the lower end of the cleaning roller (210) is connected with the inside of the groove (102).

2. A knobbed flexible pinch roller assembly as defined in claim 1 wherein, Two connecting rods (202) are fixedly connected between the outer side wall of the annular plate (200) and the inner side wall of the arc-shaped plate (201), and the outer side wall of the arc-shaped plate (201) is fixedly connected with the arc-shaped block (203).

3. A knobbed flexible pinch roller assembly as defined in claim 2 wherein, One side of the arc-shaped block (203) is provided with a guide hole (204), and the L-shaped rod (205) is slidingly connected in the guide hole (204).

4. A knobbed flexible pinch roller assembly as defined in claim 2 wherein, The spring (206) is fixedly connected between one side of the arc-shaped block (203) and the L-shaped rod (205), and the spring (206) is sleeved on the circumferential side of the L-shaped rod (205).

5. A knobbed flexible pinch roller assembly as defined in claim 1 wherein, One end of the L-shaped rod (205) is fixedly connected with the positioning disc (207), and the other end of the L-shaped rod (205) is fixedly connected with the rubber pad (208) on the circumferential side.

6. A knobbed flexible pinch roller assembly as defined in claim 1 wherein, The upper end of the cleaning roller (210) is provided with a threaded hole (211), and one end of the threaded rod (209) is threadedly connected in the threaded hole (211).

7. A knobbed flexible pinch roller assembly as defined in claim 1 wherein, The outer side wall of the cleaning roller (210) is uniformly fixedly connected with a plurality of brushes, one end of the brush is connected with the inner side wall of the groove (102).

8. A knobbed flexible pinch roller assembly as defined in claim 1 wherein, The outer side wall of one end of the knob body (100) is uniformly fixedly connected with a plurality of anti-skid convex patterns (101), the other end of the knob body (100) is fixedly connected with the pressing member (103), and the pressing member (103) is located between the annular plate (200) and the arc-shaped plate (201).

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