Suction head of negative pressure aspirator with TIP convenient to replace

Abstract

The utility model discloses a suction head of a negative pressure aspirator with a TIP convenient to replace, and belongs to the technical field of laboratory instruments and equipment. The suction head comprises a suction head body, a sleeve, a connecting assembly and a spring. The suction head main body is hollow and is used for sucking waste liquid to pass through, and a hanger accessory is arranged on one side and is convenient for hanging the suction head; the sleeve sleeves the lower half part of the suction head main body and is used for pushing out a TIP head; the connecting assembly is used for connecting the suction head main body and the sleeve, and a semicircular platform is arranged above the connecting assembly and can be conveniently pressed by a thumb; the spring is arranged between the suction head main body and the connecting assembly and is used for resetting the connecting assembly and the sleeve; and the connecting assembly and the suction head main body are combined to form an elliptic cylinder, so that the suction head can be conveniently held by a hand. According to the utility model, the TI P head can be conveniently replaced, and meanwhile, the pollution probability in the operation process is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of laboratory instruments and equipment, and more specifically, to a suction head of a negative pressure suction device that facilitates the replacement of TIPs. Background Art

[0002] An electric negative pressure suction device (hereinafter simply referred to as a suction device) is a device widely used in scientific research and clinical practice for sucking waste fluids or semi-fluid substances generated during experiments or clinical operations. Generally, the suction device consists of four parts: a collection bottle, a motor, a suction hose, and a suction head. Among them, the motor is used to generate a negative pressure state, which is transmitted to the suction head through the suction hose, forcing the substances outside the suction head to be squeezed into the suction head and inhaled into the collection bottle for temporary storage via the suction hose.

[0003] The traditional suction head is a simple tubular structure, with one end connected to the suction hose and the other end directly contacting the substance to be sucked. Due to the requirements of medical aseptic operation, disposable sterile suction hoses and suction heads need to be replaced before using the suction device for clinical use. However, since the aseptic operation requirements for suction devices used in physical and chemical and biological laboratories are relatively low, and for cost-saving reasons, the suction hoses and suction heads are usually not replaced. When performing some suction operations that require relatively clean and sterile conditions, the common practice of experimenters is to connect a clean TIP head (a pipette tip for laboratory use) in front of the end of the suction head, and use the TIP head to directly contact the waste liquid and suck it into the suction hose and collection bottle connected to the rear of the suction head. When replacing the TIP head, experimenters usually directly pull it out by hand, which may generally cause the following results: 1. The experimenter's hand comes into contact with the generated waste liquid; 2. The residual waste liquid on the TIP head drips onto the experimental operation table during the pulling process. The above results greatly increase the risk of experimental contamination and may endanger human health.

[0004] Therefore, it is necessary to provide a suction head of a negative pressure suction device that facilitates the replacement of TIPs to solve the above problems. Summary of the Utility Model

[0005] Based on the above problems existing in the prior art, the purpose of the embodiments of the present application is to provide a suction head of a negative pressure suction device that facilitates the replacement of TIPs, achieving the effect of facilitating the replacement of TIP heads.

[0006] The technical solution adopted by the present application to solve its technical problems is as follows: A suction head of a negative pressure suction device that is convenient for replacing the TIP includes a suction head main body, a sleeve, a connection component, and a spring. The suction head main body includes an upper half and a lower half. The connection component is slidably arranged on one side of the upper half. The sleeve is sleeved on the lower half, and one side of the sleeve is connected to the connection component. On one side of the upper half close to the connection component, a first pin and a second pin are provided. On the connection component, a first slot and a second slot respectively adapted to the first pin and the second pin are provided. On the upper side of the first slot, a spring groove is provided. The spring is located in the spring groove, and the spring contacts the upper end of the first pin.

[0007] Further, an ear attachment is fixed on one side of the upper half away from the connection component.

[0008] Further, the upper half is a relatively thick semi-elliptical cylinder, the lower half is a relatively thin cylinder, and the connection component and the upper half are combined into an elliptical cylinder shape.

[0009] Further, the front surface of the first pin is an inverted T shape, and grooves are provided on the outer walls of the first pin and the second pin.

[0010] Further, a third slot is provided on one side of the sleeve, and a third pin adapted to the third slot is fixed on the connection component.

[0011] Further, the original length of the spring is not less than the length from the upper edge of the spring groove to the upper edge of the first pin.

[0012] Further, the first slot is composed of two symmetric convex ribs. The first slot is connected to the first pin and can slide relatively up and down;

[0013] The second slot is composed of two symmetric convex ribs. The second slot is connected to the second pin and can slide relatively up and down.

[0014] The beneficial effects of the present utility model are as follows:

[0015] By pressing the upper side of the connection component with the thumb, the sleeve connected thereto is driven to slide downward on the suction head main body together. The sleeve can easily push out the TIP head connected to the end of the suction head. After releasing the thumb, due to the action of the spring compression recovery, the connection component and the sleeve are driven to automatically reset;

[0016] The whole of the present utility model is in an elliptical cylinder shape, which can facilitate the user to press with the thumb and is convenient to be held by the whole hand in a gripping manner;

[0017] Through the ear-hanging attachment, it can be hung for placement to avoid contaminating the desktop. At the same time, when in use, the ear-hanging attachment can also be resisted by the other four fingers except the thumb to counteract the relative sliding caused by the thumb pressing the connecting component, making it more convenient to push out the TIP head;

[0018] Compared with the existing suction head device, the suction head of the negative pressure suction device of the present utility model that can facilitate the replacement of the TIP is more convenient, time-saving and labor-saving, and at the same time greatly reduces the probability of contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The schematic drawings of the specification forming a part of the present utility model are used to provide a further understanding of the present utility model. The illustrative embodiments of the present utility model and the descriptions thereof are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0020] Figure 1 is the overall schematic diagram of the suction head of a negative pressure suction device that can facilitate the replacement of the TIP in the present application;

[0021] Figure 2 is Figure 1 the exploded schematic diagram of the suction head of a negative pressure suction device that can facilitate the replacement of the TIP in;

[0022] Figure 3 is Figure 2 the overall schematic diagram of the connecting component in;

[0023] Figure 4 is Figure 3 the working state schematic diagram of the connecting component in;

[0024] Figure 5 is Figure 1 the partial cross-sectional schematic diagram of the suction head of a negative pressure suction device that can facilitate the replacement of the TIP in;

[0025] In the figure:

[0026] 1. Suction head main body; 11. Upper half part; 12. Lower half part; 111. First pin; 112. Second pin; 13. Ear-hanging attachment;

[0027] 2. Sleeve; 21. Third slot;

[0028] 3. Connecting component; 31. First slot; 32. Second slot; 33. Third pin; 34. Spring groove;

[0029] 4. Spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine the embodiments to detail the present novel.

[0031] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which this application pertains.

[0032] In this new type, in the case of no contrary description, the directions such as "upper and lower" are usually in relation to the directions shown in the drawings, or in relation to the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left and right" are usually in relation to the left and right shown in the drawings; "inside and outside" refer to the inside and outside relative to the contours of each component itself, but the above directional terms are not used to limit this new type.

[0033] As Figures 1-5 shown, the present application provides a suction head of a negative pressure suction device that facilitates the replacement of the TIP. A suction head of a negative pressure suction device that facilitates the replacement of the TIP includes a suction head main body 1, a sleeve 2, a connection assembly 3 and a spring 4. The suction head main body 1 includes an upper half 11 and a lower half 12. The upper half 11 is a relatively thick semi-elliptical cylinder, and the lower half 12 is a relatively thin cylinder. The connection assembly 3 is joined with the upper half 11 to form an elliptical cylinder shape.

[0034] The connection assembly 3 is joined with the upper half 11 to form an elliptical cylinder shape, which can facilitate the user's grip. For the parts such as the upper half 11 and the connection assembly 2 that need to be directly held by hand, in order to improve comfort and increase friction, the surface can be covered with flexible materials such as rubber.

[0035] On one side of the upper half 11 close to the connection assembly 3, a first pin 111 and a second pin 112 are provided. The front of the first pin 111 is in an inverted T shape. Grooves are provided on the outer walls of the first pin 111 and the second pin 112. On the connection assembly 3, a first slot 31 and a second slot 32 are provided that are respectively adapted to the first pin 111 and the second pin 112.

[0036] The first slot is composed of two symmetrical convex ribs. The first slot is connected to the first pin and can slide relatively up and down.

[0037] The second slot is composed of two symmetrical convex ribs. The second slot is connected to the second pin and can slide relatively up and down.

[0038] On the upper side of the first slot 31, a spring groove 34 is provided. The spring 4 is located in the spring groove 34. The spring 4 contacts the upper end of the first pin 111. The original length of the spring 4 is not less than the length from the upper edge of the spring groove 34 to the upper edge of the first pin 111.

[0039] Through the grooves on the first pin 111 and the second pin 112, the connection assembly 3 can move up and down on one side of the upper half 11, and the stability of the connection is improved to ensure the directionality of the sliding.

[0040] An ear-hanging accessory 13 is fixed to a side of the upper part 11 away from the connecting component 3. The curvature of the ear-hanging accessory 13 should be designed with reference to the curvature of the index finger in the hand holding state, so as to facilitate the fit between the ear-hanging accessory and the index finger.

[0041] The sleeve 2 is sleeved on the lower part 12 , one side of the sleeve 2 is connected to the connecting component 3 , one side of the sleeve 2 is provided with a third slot 21 , and a third latch 33 adapted to the third slot 21 is fixed on the connecting component 3 .

[0042] The inner diameter of the sleeve 2 should be slightly larger than the outer diameter of the lower half 12 so that it can be just sleeved on the outer side of the lower half 12 of the suction head body and can slide up and down.

[0043] It can be understood that the lower end of the lower half 12 is used to connect the T IP head. When the T IP head needs to be replaced, the operator presses the upper side of the connecting component 3 with the thumb while keeping the hand holding, and the connecting component 3 can drive the sleeve 2 to slide downward relative to the attraction head body. The connected TIP head can be smoothly pushed out while the sleeve slides downward. In this process, the bottom of the inverted T-shaped first pin 111 can block the ridge 31 of the first slot to prevent the connecting component 3 and the sleeve 2 from sliding downward excessively relative to the attraction head body. At the same time, the spring 4 is squeezed and compressed by the upper edge of the spring groove 34 and the upper edge of the inverted T-shaped first pin 111; after releasing the thumb, the compressed spring 4 will restore its original length under the action of elastic recovery, thereby driving the connecting component 3 and the sleeve 2 to slide upward relative to the attraction head body 1, thereby playing a role of automatic resetting.

[0044] To further improve convenience, the ear-hanging accessory 13 is used to facilitate hanging and placement to avoid contaminating the desktop. The ear-hanging accessory can also be held by the other four fingers except the thumb when in use to resist the relative sliding caused by the thumb pressing the connecting component, making it easier to push out the T IP head.

[0045] The utility model makes it more convenient to replace the TIP head, saves time and effort, and greatly reduces the probability of pollution.

[0046] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0048] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0049] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0050] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. The suction head of a negative pressure suction device that facilitates the replacement of the TIP, characterized in that: It includes a suction head body (1), a sleeve (2), a connection component (3) and a spring (4). The suction head body (1) includes an upper half (11) and a lower half (12). The connection component (3) is slidably arranged on one side of the upper half (11). The sleeve (2) is sleeved on the lower half (12). One side of the sleeve (2) is connected to the connection component (3). On one side of the upper half (11) close to the connection component (3), a first pin (111) and a second pin (112) are arranged. On the connection component (3), a first slot (31) and a second slot (32) are respectively arranged and adapted to the first pin (111) and the second pin (112). On the upper side of the first slot (31), a spring groove (34) is arranged. The spring (4) is located in the spring groove (34), and the spring (4) contacts the upper end of the first pin (111).

2. The suction head of a negative pressure suction device that facilitates the replacement of the TIP according to claim 1, characterized in that: On the side of the upper half (11) far from the connection component (3), a hanging ear attachment (13) is fixed.

3. The suction head of a negative pressure aspirator that facilitates the replacement of the TIP according to claim 1, characterized in that: The upper half (11) is a relatively thick semi-elliptical cylinder, and the lower half (12) is a relatively thin cylinder. The connection component (3) and the upper half (11) are combined into an elliptical cylinder shape.

4. The suction head of a negative pressure aspirator capable of facilitating the replacement of the TIP according to claim 1, characterized in that: The front of the first pin (111) is an inverted T shape, and grooves are arranged on the outer walls of the first pin (111) and the second pin (112).

5. The suction head of a negative pressure aspirator that facilitates the replacement of the TIP according to claim 1, characterized in that: On one side of the sleeve (2), a third slot (21) is arranged, and a third pin (33) adapted to the third slot (21) is fixed on the connection component (3).

6. The suction head of a negative pressure aspirator that facilitates the replacement of the TIP according to claim 1, wherein: The original length of the spring (4) is not less than the length from the upper edge of the spring groove (34) to the upper edge of the first pin (111).

7. The suction head of a negative pressure suction device that facilitates the replacement of the TIP according to claim 1, wherein: The first slot (31) is composed of two symmetric convex ribs. The first slot (31) is connected to the first pin (111) and can slide relatively up and down. The second slot (32) is composed of two symmetric convex ribs. The second slot (32) is connected to the second pin (112) and can slide relatively up and down.

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