Rat and mouse fixing device

Abstract

A rat and mouse fixing device is used for meeting the requirement for fixing an operation model animal with a device on the back, improving the comfort degree of fixing an experimental mouse, reducing animal stress, prolonging the service life of the model animal, improving the test operation efficiency and enabling test data to be more accurate. Which comprises a cylinder capable of containing a laboratory mouse, a conical thin shell is fixedly arranged at the front end of the cylinder, and vent holes are formed in the shell wall of the conical thin shell at intervals, and is characterized in that an annular groove which annularly extends from the top to the two sides by a certain arc length is formed in the front portion of the cylinder, and a longitudinal groove which longitudinally extends forwards from the rear end is formed in the top of the cylinder; the annular groove and the longitudinal groove are communicated to form a T-shaped groove; and a mouse blocking mechanism capable of moving along the longitudinal groove is arranged at the rear part of the cylinder.

Description

Technical Field

[0001] The utility model relates to medical experimental instruments, in particular to a restraining device suitable for normal mice and rats and surgical model mice and rats. Background Art

[0002] Among experimental animals, mice and rats are the most commonly used and largest-volume animals. When conducting experimental operations such as tail vein injection on mice and rats, they must be effectively restrained. If the restraint is not firm, they are very likely to be bitten by mice and rats, which may increase the risk of animal injury and increase the complexity of the experiment.

[0003] The existing restrainers for rats and mice have different styles, but they are all for normal rats and mice, and the restraining part is a cylindrical annular seal. This type of restraining device has the following shortcomings:

[0004] 1. It cannot be used for mice and rats undergoing surgical modeling (model animals with devices installed on the back of the neck), such as jugular vein cannulation and bile duct cannulation;

[0005] 2. If used forcibly, it may cause blockage of the pipeline, increase friction at the animal's surgical site causing pain, and even damage the back device. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a large mouse restraint device to meet the needs of surgical model animals with a device on the back, improve the comfort of laboratory mouse restraint, reduce animal stress, increase the use cycle of model animals, improve test operation efficiency, and make test data more accurate.

[0007] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0008] The utility model discloses a rat restraining device, comprising a cylinder capable of accommodating experimental rats, a conical thin shell being fixedly arranged at the front end of the cylinder, air vents being arranged at intervals on the shell wall of the conical thin shell, and the utility model is characterized in that: an annular groove extending from the top to both sides with a certain arc length is arranged at the front part of the cylinder, a longitudinal groove extending longitudinally from the rear end to the front is arranged at the top of the cylinder, the annular groove and the longitudinal groove are connected to form a T-shaped groove; and a rat blocking mechanism movable along the longitudinal groove is arranged at the rear part of the cylinder.

[0009] The mouse blocking mechanism includes a baffle, an arc plate and a locking bolt; the baffle is located in the inner cavity of the cylinder, and a vertical groove is opened at the lower part thereof for the tail of the experimental mouse to pass through; the arc plate is attached to the outer wall of the cylinder, and the lower end of the locking bolt passes through the arc plate and the longitudinal groove and is fixedly connected to the baffle.

[0010] The beneficial effects of the utility model are mainly reflected in the following aspects:

[0011] 1. This rat restraint device can be used for surgical model animals with devices on their backs, such as animals with jugular vein cannulation and bile duct cannulation, to perform relevant operations on experimental mice without affecting the devices on their backs;

[0012] 2. Reduce the friction of the back device, improve the comfort of mice and rats, reduce animal stress, increase the use cycle of model animals, improve test operation efficiency, and make test data more accurate;

[0013] 3. It has a wider scope of application and is suitable for normal mice and rats and surgical model mice. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] This specification includes the following four drawings:

[0015] Figure 1 It is a top view of a restraining device for rats and mice of the utility model;

[0016] Figure 2 is along Figure 1 Sectional view of AA in the middle;

[0017] Figure 3 is along Figure 1 Cross-sectional view of the middle BB;

[0018] Figure 4 is along Figure 1 Cross-sectional view of CC.

[0019] The figure shows the components and corresponding marks: base 10, conical thin shell 20, vent hole 21, cylinder 30, annular groove 31, longitudinal groove 32, baffle 40, vertical groove 41, arc plate 43, locking bolt 44. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Reference Figures 1 to 4The utility model is a rat restraining device, comprising a cylinder 30 for accommodating experimental rats, a conical thin shell 20 is fixedly arranged at the front end of the cylinder 30, and vent holes 21 are arranged at intervals on the shell wall of the conical thin shell 20. An annular groove 31 extending from the top to both sides for a certain arc length is arranged at the front of the cylinder 30, and a longitudinal groove 32 extending longitudinally from the rear end to the front is arranged at the top of the cylinder 30, and the annular groove 31 and the longitudinal groove 32 are connected to form a T-shaped groove. A rat-blocking mechanism that can move along the longitudinal groove 32 is arranged at the rear of the cylinder 30. The restraining structure is divided into head restraining and body restraining. The head restraining is positioned at the front end of the conical thin shell 20 and the cylinder 30, and the body restraining is positioned in the cylinder 30 thereafter. The length required for restraint is adjusted and locked by the rat-blocking mechanism. The T-shaped groove on the wall of the cylinder 30 can be used for the back devices of the experimental mouse (such as intravenous cannula, bile duct cannula, etc.) to pass through, so that relevant operations can be performed on the experimental mouse without affecting the back devices. At the same time, the friction of the back devices can be reduced, the comfort of the experimental mouse can be improved, the stress of the experimental mouse can be reduced, the use cycle of the model animal can be increased, the test operation efficiency can be improved, and the test data can be more accurate.

[0022] Reference Figure 2 and Figure 4 The mouse blocking mechanism includes a baffle 40, an arc plate 43 and a locking bolt 44. The baffle 40 is located in the inner cavity of the cylinder 30, and a vertical groove 41 is provided at the lower part thereof for the tail of the experimental mouse to pass through. The arc plate 43 is in contact with the outer wall of the cylinder 30, and the lower end of the locking bolt 44 passes through the arc plate 43 and the longitudinal groove 32 and is fixedly connected to the baffle 40. After loosening the locking bolt 44, the position of the baffle 40 can be easily changed, that is, the restraining length of the inner cavity of the cylinder 30 can be easily adjusted, which can well meet the needs of restraining experimental mice of different lengths.

[0023] The cylinder 30, the conical shell 20 and the baffle 40 are usually made of stainless steel, which is durable and easy to clean and disinfect. They can also be made of transparent acrylic plates or organic glass materials, so that the state of the experimental mice can be easily observed during the experiment.

[0024] Reference Figure 2 The cylinder 30 is fixedly mounted on the base 10 .

[0025] The above description is only to illustrate some principles of the large mouse restraint device of the utility model, and is not intended to limit the utility model to the specific structure and applicable scope shown and described. Therefore, all corresponding modifications and equivalents that may be used are within the scope of the patent applied for by the utility model.

Claims

1. A rat restraining device, comprising a cylinder (30) for accommodating experimental rats, a conical thin shell (20) being fixedly arranged at the front end of the cylinder (30), and vent holes (21) being arranged at intervals on the shell wall of the conical thin shell (20), wherein: The front part of the cylinder (30) is provided with an annular groove (31) extending circumferentially from the top to both sides with a certain arc length, and the top of the cylinder (30) is provided with a longitudinal groove (32) extending longitudinally from the rear end to the front, and the annular groove (31) and the longitudinal groove (32) are connected to form a T-shaped groove; the rear part of the cylinder (30) is provided with a mouse blocking mechanism that can move along the longitudinal groove (32).

2. A rat restraining device as claimed in claim 1, characterized in that: The mouse blocking mechanism comprises a baffle (40), an arc-shaped plate (43) and a locking bolt (44); the baffle (40) is located in the inner cavity of the cylinder (30), and a vertical groove (41) is provided at the lower part thereof for the tail of the experimental mouse to pass through; the arc-shaped plate (43) is in contact with the outer wall of the cylinder (30), and the lower end of the locking bolt (44) passes through the arc-shaped plate (43) and the longitudinal groove (32) and is fixedly connected to the baffle (40).

3. A rat restraining device as claimed in claim 2, characterized in that: The cylinder (30), the conical thin shell (20) and the baffle (40) are made of stainless steel, acrylic plate or organic glass material.

4. A rat restraint device according to any one of claims 1 to 3, characterized in that: The cylinder (30) is fixedly mounted on the base (10).

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