Adjustable cell scraper blade

Abstract

The utility model relates to an adjustable cell scraping blade knife, including blade, connecting piece, cross axle, screw rod, helical fastener and shell, connecting piece one end is hinged with the blade, the other end passes through the universal fork, and is hinged with the driven shaft of cross axle, the driving shaft of cross axle is hinged with the universal fork of screw rod, the shell is sleeved in connecting piece and screw rod outside, to make connecting piece and screw rod between the obtuse angle setting, the limiting boss that is combined with screw rod is equipped in the shell inner wall, the shell opposite limiting boss is equipped with threaded hole, is provided with helical fastener in threaded hole, connecting piece and screw rod are connected through cross axle, form universal transmission structure, when using, the operator will compress the blade in scraping surface, utilize the friction between blade and scraping surface and fix the blade, rotate screw rod, can change the angle of blade relative to shell handle, need to fix the angle of blade and handle, screw helical fastener, screw rod is clamped and fixed by helical fastener and limiting boss, thereby limit the rotation of blade.

Description

Technical Field

[0001] This utility model relates to the field of biological experimental equipment technology, and in particular to an adjustable cell scraper. Background Technology

[0002] A cell scraper is a commonly used tool in cell culture to help researchers collect cell samples. Currently, most cell scrapers can only move in one direction to scrape cells. When encountering special angles inside culture flasks, it is inconvenient to scrape. During use, the angle of the scraper head needs to be repeatedly adjusted. Adjusting the angle by touching the blade can lead to blade contamination. Existing cell scrapers with adjustable blade angles connect the handle and blade directly through a pivot without a limiting device. The pivot is prone to loosening. The scraping direction can be changed but is not easy to control. Changing the scraping angle makes it difficult to apply stable force during scraping, which can easily lead to operational errors. Therefore, there is a need for a cell scraper that can both change the blade direction and stably fix the blade direction. Utility Model Content

[0003] The purpose of this invention is to provide an adjustable cell scraper to solve the aforementioned problems in the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An adjustable cell scraper includes a blade, a connector, a cross shaft, a rotating rod, a helical fastener, and a housing. One end of the connector is hinged to the blade, and the other end is hinged to the driven shaft of the cross shaft via a universal fork. The driving shaft of the cross shaft is hinged to the universal fork of the rotating rod. The housing is sleeved outside the connector and the rotating rod so that the connector and the rotating rod are set at an obtuse angle. The inner wall of the housing is provided with a limiting boss that fits against the rotating rod. The housing is provided with a threaded through hole relative to the limiting boss, and the helical fastener is provided in the threaded through hole.

[0005] The beneficial effects of this utility model are: the blade and the connecting piece are hinged, which realizes the angle adjustment of the blade relative to the central axis of the connecting piece, so that the blade can be adjusted to fit the scraping surface even when it is tilted. At the same time, the connecting piece and the rotating rod are connected by a cross shaft to form a universal transmission structure, which realizes the rotation of the blade relative to the central axis of the connecting piece. When the two axes of the connecting piece and the rotating rod are at a certain angle, they can also rotate relative to each other. The rotation of the connecting piece and the rotating rod is mutually transmitted. Restricting the rotation of the rotating rod can restrict the rotation of the connecting piece, thereby restricting the rotation of the blade relative to the central axis of the connecting piece.

[0006] In practice, the operator presses the blade against the scraping surface and uses the friction between the blade and the scraping surface to fix the blade. By rotating the rotating rod, the angle of the blade relative to the handle of the outer shell can be changed. When it is necessary to fix the angle between the blade and the handle, tighten the spiral fastener. The rotating rod is clamped and fixed by the spiral fastener and the limiting boss, thereby restricting the rotation of the blade.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the connector has a first limiting groove in the middle, which cooperates with the limiting protrusion at the front end of the housing. The housing has a second limiting groove near the end, and a bearing is installed inside. The rotating rod passes through the bearing and extends out of the housing. The inner ring of the bearing is tightly fitted with the rotating rod, and the outer diameter of the rotating rod is smaller than the inner diameter of the housing.

[0009] Furthermore, the outer shell is stepped, with a small diameter section at the front end and a large diameter section at the rear end, and the large diameter section has anti-slip texture on the outside.

[0010] Furthermore, the inner wall of the large-diameter section of the outer shell is provided with a limiting rib ring.

[0011] Furthermore, the portion of the rotating rod extending out of the housing is a knob.

[0012] Furthermore, the included angle between the connector and the swivel rod is between 125° and 165°.

[0013] Furthermore, the limiting boss and the corresponding threaded through hole are located on the large-diameter section of the outer shell near the small-diameter section. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure of this utility model;

[0016] The attached diagram lists the components represented by each number as follows:

[0017] 1. Scraper blade, 2. Connector, 21. First limiting groove, 3. Cross shaft, 4. Rotating inner rod, 41. Bearing, 42. Knob, 5. Spiral fastener, 6. Housing, 61. Limiting boss, 62. Limiting rib ring, 63. Second limiting groove. Detailed Implementation

[0018] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0019] like Figure 1 As shown in Embodiment 1 of this utility model, an adjustable cell scraper includes a blade 1, a connector 2, a cross shaft 3, a rotating rod 4, a helical fastener 5, and a housing 6. One end of the connector 2 is hinged to the blade 1, and the other end is hinged to the driven shaft of the cross shaft 3 via a universal fork. The driving shaft of the cross shaft 3 is hinged to the universal fork of the rotating rod 4. The housing 6 is sleeved outside the connector 2 and the rotating rod 4, so that the connector 2 and the rotating rod 4 are set at an obtuse angle. The inner wall of the housing 6 is provided with a limiting boss 61 that fits against the rotating rod 4. The housing 6 is provided with a threaded through hole opposite to the limiting boss 61, and the helical fastener 5 is disposed in the threaded through hole.

[0020] The blade 1 is hinged to the connector 2, allowing for angle adjustment of the blade 1 relative to the central axis of the connector 2. This enables the blade 1 to be adjusted to fit the scraping surface even when tilted. Simultaneously, the connector 2 and the rotating rod 4 are connected by a cross shaft 3, forming a universal transmission structure. This allows the blade 1 to rotate relative to the central axis of the connector 2. The two axes of the connector 2 and the rotating rod 4 can also rotate relative to each other when they are at a certain angle. The rotation of the connector 2 and the rotating rod 4 is mutually transmitted. Restricting the rotation of the rotating rod 4 restricts the rotation of the connector 2, thereby restricting the rotation of the blade 1 relative to the central axis of the connector 2.

[0021] In practice, the operator presses the blade 1 against the scraping surface and uses the friction between the blade 1 and the scraping surface to fix the blade 1. By rotating the rotating rod 4, the angle of the blade 1 relative to the handle of the outer shell 6 can be changed. When it is necessary to fix the angle between the blade 1 and the handle, tighten the spiral fastener 5. The rotating rod 4 is clamped and fixed by the spiral fastener 5 and the limiting boss 61, thereby restricting the rotation of the blade 1.

[0022] This utility model embodiment 2 provides an adjustable cell scraper. Based on embodiment 1, the connecting member 2 has a first limiting groove 21 in the middle, which cooperates with the limiting protrusion at the front end of the outer shell 6. The outer shell 6 has a second limiting groove 63 near the end, and a bearing 41 is installed inside. The rotating rod 4 passes through the bearing 41 and extends out of the outer shell 6. The inner ring of the bearing 41 is tightly fitted with the rotating rod 4. The outer diameter of the rotating rod 4 is smaller than the inner diameter of the outer shell 6, reducing the contact area and thus reducing the friction between the outer shell 6 and the rotating rod 4, preventing the blade 1 from failing to rotate due to excessive friction.

[0023] The use of bearing 41 avoids direct contact between the rotating rod 4 and the outer shell 6, preventing friction. The relative rotation of the rotating rod 4 and the outer shell 6 drives the inner and outer rings of bearing 41 to rotate relative to each other, reducing the coefficient of friction between the rotating rod 4 and the outer shell 6, and further reducing the frictional force between the outer shell 6 and the rotating rod 4. The limiting protrusion of the outer shell 6 and the bearing 41 provide two-point limiting for the internal structure of the outer shell 6, fixing the axial position of the internal structure and preventing the transmission structure from contacting the outer shell 6 and causing friction, which would prevent the blade 1 from rotating normally.

[0024] Example 3 of this utility model is an adjustable cell scraper. Based on Example 1, the outer shell 6 is stepped, with a small diameter section at the front end and a large diameter section at the rear end. The large diameter section is provided with anti-slip texture on the outside.

[0025] The handle end is a large diameter section to prevent the pressure generated by the operator gripping the outer shell 6 from deforming the outer shell 6, causing a large area of ​​the inner wall of the outer shell to be in close contact with the rotating rod 4, increasing the friction and hindering the normal rotation of the rotating rod 4. The anti-slip texture design increases the friction between the outer shell 6 and the operator's palm, making it easier for the outer shell 6 to rotate and enhancing the operator's operating feel.

[0026] Example 4 of this utility model is an adjustable cell scraper, which, based on Example 2, has a limiting rib ring 62 on the inner wall of the large diameter section of the outer shell 6.

[0027] The limiting rib ring 62 is used to reinforce the inside of the outer shell 6 to prevent deformation and affect the operation feel. At the same time, it has a small contact area with the rotating rod 4 to further limit the rotating rod 4 while preventing excessive friction, so as to prevent the rotating rod 4 from bending and being unable to rotate normally along the axial direction.

[0028] Example 5 of this utility model is an adjustable cell scraper, which, based on Example 2, has a knob 42 extending from the outer shell 6 onto the rotating rod 4.

[0029] After long-term use, the contact surface between the rotating rod 4 and the outer shell 6 will gradually become rough, and the friction will gradually increase. When the friction is too great, the internal structure will become stuck and unable to rotate relative to the outer shell 6. In this case, the knob 42 behind the rotating rod 4 can be turned directly to make the blade 1 continue to rotate.

[0030] This utility model embodiment 6 provides an adjustable cell scraper. Based on embodiment 1, the included angle between the connecting member 2 and the rotating rod 4 is between 125° and 165°, so that the blade 1 forms a certain angle with the handle direction, which facilitates the force on the blade 1 and allows the force to be transmitted to the scraping surface to a certain extent along the direction of the blade 1. It should be understood that if the angle between the connecting member 2 and the rotating rod 4 is too small, interference will occur between the parts, causing the universal transmission structure to fail to operate. Therefore, while facilitating the force distribution, interference between the parts is avoided, and the angle within this range is selected.

[0031] Example 7 of this utility model is an adjustable cell scraper. Based on Example 3, a limiting boss 61 and a corresponding threaded through hole are provided on the outer shell 6 near the small diameter section of the large diameter section.

[0032] In practice, the operator holds the large-diameter handpiece of the outer shell to scrape cells. When it is necessary to fix the rotation angle of the blade 1, the operator can directly move the spiral fastener 5 with the fingers holding the handle, making the operation more flexible and convenient.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable cell scraper, characterized in that, The device includes a blade (1), a connector (2), a cross shaft (3), a rotating rod (4), a helical fastener (5), and a housing (6). One end of the connector (2) is hinged to the blade (1), and the other end is hinged to the driven shaft of the cross shaft (3) via a universal fork. The driving shaft of the cross shaft (3) is hinged to the universal fork of the rotating rod (4). The housing (6) is fitted over the connector (2) and the rotating rod (4) so ​​that the connector (2) and the rotating rod (4) are set at an obtuse angle. The inner wall of the housing (6) is provided with a limiting boss (61) that fits against the rotating rod (4). The housing (6) is provided with a threaded through hole relative to the limiting boss (61), and the helical fastener (5) is provided in the threaded through hole.

2. The adjustable cytopipet according to claim 1, wherein The connector (2) is provided with a first limiting groove (21) in the middle. The first limiting groove (21) cooperates with the limiting protrusion at the front end of the outer shell (6). The outer shell (6) is provided with a second limiting groove (63) near the end. A bearing (41) is installed inside. The rotating rod (4) passes through the bearing (41) and extends out of the outer shell (6). The inner ring of the bearing (41) is tightly fitted with the rotating rod (4). The outer diameter of the rotating rod (4) is smaller than the inner diameter of the outer shell (6).

3. The adjustable cytopipet according to claim 1, wherein The outer shell (6) is stepped, with a small diameter section at the front end and a large diameter section at the rear end. The large diameter section has anti-slip texture on the outside.

4. The adjustable cytopipet according to claim 3, wherein The inner wall of the large diameter section of the outer shell (6) is provided with a limiting rib ring (62).

5. The adjustable cytopipet according to claim 2, wherein The part of the rotating rod (4) that extends out of the outer casing (6) is a knob (42).

6. The adjustable cytopipet according to claim 1, wherein The included angle between the connector (2) and the swivel (4) is between 125° and 165°.

7. The adjustable cytopipet according to claim 3, wherein The limiting boss (61) and the corresponding threaded through hole are located on the large diameter section of the outer shell (6) near the small diameter section.

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