Simple suction head withdrawing device of liquid suction device

Abstract

The simple suction head withdrawing device of the liquid suction device comprises a fixing assembly, a pressing rod and a reset spring, the fixing assembly comprises a shell with an upper opening and a cover body covering the shell, the middle positions of the two opposite sides of the shell are respectively provided with an installation hole for containing a suction head connector, and the tops of the two sides of the shell are respectively provided with a notch; the pressing rod comprises an abutting piece, a pressing rod body and a pressing piece, the abutting piece and the pressing piece are arranged at the two ends of the pressing rod body respectively, the abutting piece and the pressing piece are arranged in a back-to-back mode, the pressing rod body is installed on the top of the shell and contained in the notch, and the abutting piece located on the outer side of the shell is provided with a containing hole matched with the suction head body in shape. A connecting lug is arranged on the pressing rod body and connected with the inner wall of the shell through a reset spring. The pressing piece drives the abutting piece to move in the direction close to the suction head so as to separate the suction head from the suction head connector, liquid of the suction head is prevented from making contact with the hand, meanwhile, the device can be operated with one hand, and the operation efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of liquid suction device technology, specifically relating to a simple suction head retraction device for liquid suction devices. Background Technology

[0002] Most existing pipettes consist of a vacuum pump, a waste bottle, and pipette tip connectors. Pipette tip connectors are generally available in 8-prong and single-prong versions. During liquid changes and aspiration, new pipette tips are needed when aspirating different liquids or different experimental samples. Since single-prong pipette tips lack a one-handed tip removal design, the operator must hold the connector with one hand and remove the tip with the other. This operation poses a potential risk of contamination or harm to both the operator and the experimental samples. For example, if the liquid contains harmful substances, these substances may adhere to gloves when removing the pipette tip and be carried out of the experimental area. Contact with other objects can cause environmental pollution, and if the harmful substances are strong, they can affect the health of the operators. Furthermore, if gloves are not thoroughly sterilized, bacteria from the fingers can adhere to the pipette tip connector. During subsequent operations, these bacteria can fall onto the experimental samples, leading to experimental failure and resulting in economic and time losses.

[0003] Therefore, there is an urgent need to design a single-handed suction head retraction device for single-claw suction head connectors to avoid the above situation and improve operating efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a simple suction head retraction device for a liquid aspirator to avoid contact with the hand and prevent contact with contaminants, while allowing for one-handed operation and improving operating efficiency.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A simple suction tip removal device for a liquid aspirator includes a fixing assembly, comprising a housing with an upper opening and a cover fitted onto the housing. Mounting holes are respectively formed at the midpoint of opposite sides of the housing to accommodate suction tip connectors, and slots are respectively formed at the top of both sides of the housing.

[0007] The pressure rod includes an abutment, a pressure rod body, and a pressing member. The abutment and the pressing member are respectively fixed to both ends of the pressure rod body, and the abutment and the pressing member are spaced apart and arranged facing away from each other. The pressure rod body is installed on the top of the housing and accommodated in the slot. The abutment located on the outside of the housing is arranged downward and has a receiving hole adapted to the shape of the suction head connector. The pressure rod body is provided with a connecting ear, and the connecting ear is connected to the inner wall of the housing through a return spring.

[0008] The suction head connector extends from the mounting hole to the receiving hole and is fixed to the housing by fasteners. The pressing member drives the abutment member to move closer to the suction head to separate the suction head and the suction head connector.

[0009] In one embodiment, the abutting member is fixedly connected to the pressure rod body and is arranged vertically, the gripping member is fixedly connected to the pressure rod body and is arranged vertically, and the abutting member and the pressing member are spaced apart and arranged opposite to each other.

[0010] In one embodiment, the inner wall of the mounting hole is lined with anti-slip rubber, and a threaded hole is tangentially located at the bottom center of its end face for fastening screws to fasten the suction head connector.

[0011] In one embodiment, the connecting lug is an arc-shaped metal sheet with a hole in the middle for connecting a reset spring.

[0012] In one embodiment, the cover is fixed to the housing by fasteners, and the cover engages with the slot to guide the pressure rod.

[0013] In one embodiment, the width of the slot is greater than the width of the pressure bar body.

[0014] In one embodiment, the inner diameter of the receiving hole is smaller than the outer diameter of the suction head.

[0015] In one embodiment, the abutment is an arc-shaped ring.

[0016] In one embodiment, the housing is a cuboid structure with an internal cavity, and the cross-section of the housing is U-shaped.

[0017] Due to the adoption of the above technical solution, the beneficial effects of this utility model include: Before use, pass the suction head connector through the mounting holes at both ends of the housing, adjust the position of the push-out end of the pressure rod, and rotate the fastener to fix the suction head connector on the housing. During use, hold the suction head connector equipped with the suction head retraction device with one hand and press the pressing element with your thumb. The pressure rod moves forward under force, the front end of the contact element abuts against the suction head and pushes it outward. Release the thumb pressure rod to reset it, reinsert the new suction head, and complete the suction head replacement operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the following accompanying drawings are provided:

[0019] Figure 1 This is a schematic diagram of the simplified suction head retraction device of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the fixing component of this utility model.

[0021] Figure 3 for Figure 2 Side view.

[0022] Figure 4This is a schematic diagram of the structure of the shell of this utility model.

[0023] Figure 5 for Figure 4 Side view.

[0024] Figure 6 This is a schematic diagram of the structure of the pressure bar of this utility model.

[0025] Figure 7 This is a schematic diagram of the device of this utility model in use.

[0026] Marked in the image:

[0027] 100. Pressure rod; 110. Pressing element; 120. Pressure rod body; 130. Abutting element; 140. Connecting ear; 200. Return spring; 300. Fixing assembly; 310. Housing; 311. Groove; 312. Spring hanging hole; 313. Threaded hole; 320. Cover; 330. Anti-slip rubber; 410. Suction head connector; 420. Connector; 500. Fastener. Detailed Implementation

[0028] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0029] For ease of description, spatial relative terms will be used where necessary. It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "joined," "fixed," etc., 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Unless otherwise specified, the terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, and are to be understood as having the meaning consistent with the meaning in the context of the related art, and should not be interpreted in an idealized or over-formalized manner, except as expressly defined in this invention.

[0032] Reference Figure 1-2 A simple suction tip removal device for a liquid aspirator, comprising:

[0033] The fixing component 300 includes a housing 310 with an upper opening and a cover 320 covering the housing 310. The housing 310 has mounting holes at the middle positions of opposite sides to accommodate the suction head connector 410, and the top of the two sides of the housing has slots 311.

[0034] The pressure rod 100 includes an abutment 130, a pressure rod body 120, and a pressing member 110. The abutment 130 and the pressing member 110 are respectively fixed to both ends of the pressure rod body 120, and the abutment 130 and the pressing member 110 are spaced apart and arranged facing away from each other. The pressure rod body 120 is installed on the top of the housing 310 and accommodated in the slot 311. The abutment 130, located on the outside of the housing, is downwardly positioned and has a receiving hole adapted to the shape of the suction head connector. The pressure rod body 120 is provided with a connecting lug 140.

[0035] A return spring 200, one end of which is connected to the inner wall of the housing 310, and the other end of which is connected to the connecting lug 140;

[0036] The suction head connector 410 extends from the mounting hole to the receiving hole and is fixed to the housing 310 by the fastener 500. The pressing member 110 drives the abutment member 130 to move closer to the suction head 420 to separate the suction head 420 and the suction head connector 410.

[0037] Before use, pass the suction head connector 410 through the mounting holes at both ends of the housing to the receiving hole, and rotate the fastener to fix the suction head connector 410 on the housing 310. The abutment 130 is movably sleeved on the outside of the suction head connector 410. Adjust the position of the push-out end of the pressure rod. When in use, hold the suction head removal device with one hand, press the pressing member 110 with your thumb, and the abutment 130 moves forward under force. The front end of the abutment 130 abuts against the suction head 420 and pushes it outward to separate the suction head 420 and the suction head connector 410. Release the thumb pressure rod to reset, reinsert the new suction head, and complete the suction head replacement operation.

[0038] like Figure 4 As shown, in one embodiment, the cover 320 and the housing 310 are fixed by fasteners, and the cover 320 cooperates with the slot 311 to guide the pressure rod 100. The housing 310 has a cuboid structure with an internal cavity, and the cross-section of the housing 310 is U-shaped, as shown. Figure 3 or Figure 5 As shown, mounting holes are provided in the middle of both sides, and anti-slip rubber 330 is attached to the inner wall of the mounting holes. A threaded hole 313 is provided tangentially in the middle of the bottom of the mounting hole end face for fastening the suction head connector of the fastener 500. The upper part of the end face of both sides of the housing has a groove 311 for guiding the pressure rod. The rear or both sides of the cavity are provided with a protruding part, and the protruding part is provided with a spring hanging hole 312 for connecting the reset spring.

[0039] To improve the space utilization of the housing, in one embodiment, the connecting ear 140 is an arc-shaped metal piece with an inner diameter slightly larger than the outer diameter of the suction head connector, so as to avoid the suction head connector 410 passing through the interior of the housing 310 and obstructing the arc-shaped metal piece, while also improving the space utilization. The arc-shaped metal piece is provided with holes for connecting a return spring.

[0040] In one embodiment, the two slots 311 form a guide rail for the pressure rod. The width of the slots 311 is greater than the width of the pressure rod body 120, so that the pressure rod body 120 and the cover 320 maintain a certain gap to prevent the cover 320 from hindering its linear movement.

[0041] like Figure 6As shown, in one embodiment, the abutment 130 is fixedly connected to and vertically arranged with the pressure rod body 120, and the pressing member 110 is fixedly connected to and vertically arranged with the pressure rod body 120. The abutment 130 and the pressing member 110 are arranged opposite to each other, that is, the abutment 130 is arranged downward and the pressing member 110 is arranged upward. The pressing member 110 is used to hold and push the pressure rod body 120 to reciprocate along the straight direction of the two slots 311. Specifically, when it is necessary to disassemble the suction head 420, the pressing member 110 is held and pushed to the left, so that the abutment 130 abuts against the connector 420. Continue to push forward until the suction head connector 410 is separated from the suction head 420. The abutment 130 can be an arc-shaped ring or other structures, as long as it can abut against the connector 420 during the leftward movement. The contact member 130, the pressure rod body 120, and the pressing member 110 are designed as a single piece to improve their strength, or they can be made by welding or other methods.

[0042] In one embodiment, the inner diameter of the receiving hole is smaller than the outer diameter of the suction head. The suction head and the suction head connector are detachably connected, meaning that the inner diameter of the suction head is almost equal to the outer diameter of the suction head connector, and the outer diameter of the suction head is larger than the outer diameter of the suction head connector. The abutment 130 is movably sleeved on the outside of the suction head connector 410. The inner diameter of the receiving hole of the abutment 130 is smaller than the outer diameter of the suction head 420 and is adapted to the shape of the suction head connector 410. When the abutment 130 is moved forward under force, the abutment 130 will inevitably have a contact surface with the suction head 420, so as to separate the suction head 420 from the suction head connector 410.

[0043] The above description of the embodiments is provided to enable those skilled in the art to understand and use the present invention. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A simple suction tip retraction device for a liquid aspirator, characterized in that, include: The fixing assembly includes a housing with an upper opening and a cover covering the housing. Mounting holes are respectively provided at the middle positions of opposite sides of the housing to accommodate suction head connectors, and slots are respectively provided at the top of both sides of the housing. A pressure rod includes an abutment, a pressure rod body, and a pressing member. The abutment and the pressing member are respectively disposed at both ends of the pressure rod body, with the abutment and the pressing member facing away from each other. The pressure rod body is mounted on the top of the housing and accommodated in the slot. The abutment, located on the outside of the housing, is downwardly positioned and has a receiving hole adapted to the shape of the suction head connector. The pressure rod body has a connecting lug. A return spring, one end of which is connected to the inner wall of the housing, and the other end of which is connected to the connecting lug; The suction head connector extends from the mounting hole to the receiving hole and is fixed to the housing by fasteners. The pressing member drives the abutment member to move in the direction close to the suction head to separate the suction head and the suction head connector.

2. The simplified suction head removal device for aspirators according to claim 1, characterized in that, The abutting member is fixedly connected to the pressure rod body and is arranged vertically, the pressing member is fixedly connected to the pressure rod body and is arranged vertically, and the abutting member and the pressing member are spaced apart and arranged opposite to each other.

3. The simplified suction head removal device for aspirators according to claim 1, characterized in that, The inner wall of the mounting hole is lined with anti-slip rubber, and there is a threaded hole in the middle of the bottom of its end face for fastening screws to fasten the suction head connector.

4. The simplified suction head retraction device for aspirators according to claim 1, characterized in that, The connecting lug is an arc-shaped metal piece with a hole in the middle for connecting a reset spring.

5. The simplified suction head retraction device for aspirators according to claim 1, characterized in that, The cover is fixed to the housing by fasteners, and the cover mates with the slot to guide the pressure rod.

6. The simplified suction head retraction device for aspirators according to claim 1, characterized in that, The width of the slot is greater than the width of the pressure rod body.

7. The simplified suction head retraction device for aspirators according to claim 1, characterized in that, The inner diameter of the receiving hole is smaller than the outer diameter of the suction head.

8. The simplified suction head retraction device for aspirators according to claim 1, characterized in that, The contact element is an arc-shaped ring.

9. The simplified suction tip retraction device for aspirators according to claim 1 or 5, characterized in that, The shell has a cuboid structure with an internal cavity, and its cross-section is U-shaped.

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