Novel fixed craniotomy saw for forensic

Abstract

A novel fixed craniotomy saw for a forensic doctor belongs to the field of medical instruments. The device comprises a neck and shoulder pillow, a fixing support, an oval track, a sliding base, a clamp and an electric cutting saw, the fixing support is arranged at the top of the neck and shoulder pillow, the oval track is arranged at the top of the fixing support, the sliding base is slidably installed on the oval track, and the electric cutting saw is installed on the sliding base through the clamp. The invention aims at solving the problems that in the craniotomy process of a forensic, the forensic needs to change the body position at any time along with the cutting position when using a handheld craniotomy saw, the working efficiency of the forensic in the craniotomy work is reduced, and the workload is large. The working efficiency of the forensic is greatly improved; the workload of the forensic is reduced; the oval sliding rail is used as a rail for guiding and supporting the electric saw, so that a forensic can complete craniotomy work only by performing auxiliary adjustment without changing the posture in the operation process, the operation difficulty of forensic work is reduced, the cutting time is short, and the electric saw is suitable for popularization and application.

Description

Technical Field

[0001] The invention relates to a novel fixed forensic craniotomy saw, belonging to the field of medical instruments. Background Art

[0002] Craniotomy of corpses is an important part of forensic medicine, pathology and other inspections. At present, forensic craniotomy equipment is handheld. When it is necessary to perform craniotomy and dissection of corpses, the forensic doctor holds an electric craniotomy saw and makes the saw blade contact the cutting position for cutting. At present, the electric craniotomy saw in the prior art adopts an AC / DC dual-purpose high-speed swinging electric craniotomy saw, which is composed of a handheld main engine with a motor, a power converter, a battery, a charger, and a saw blade. When a forensic doctor uses a handheld craniotomy saw to cut the skull, the operation process is to press the saw blade of the handheld craniotomy saw to the skull cutting position for cutting. Due to the need to ensure the integrity of the cutting, the forensic doctor needs to maintain the body working position and hand-held stability for a long time during the craniotomy process, and needs to change the position of the craniotomy saw according to the craniotomy position. The forensic doctor's body posture also makes corresponding position adjustments until the cutting process is completed, which results in a large workload for the forensic doctor, limited mobile operations, and inconvenience for single-person operation.

[0003] Therefore, it is urgent to propose a new type of fixed forensic craniotomy saw to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that forensic doctors need to change their body position at any time during the craniotomy process when using a handheld craniotomy saw, which reduces the efficiency of the forensic doctor's work and the large workload. A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to determine the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0005] The technical solution of the present invention:

[0006] A novel fixed forensic craniotomy saw comprises a neck and shoulder pillow, a fixed bracket, an elliptical track, a slide seat, a clamp and an electric saw. The top of the neck and shoulder pillow is provided with a fixed bracket, the top of the fixed bracket is provided with an elliptical track, a slide seat is slidably mounted on the elliptical track, and the electric saw is mounted on the slide seat through the clamp.

[0007] Preferably, the clamp comprises a clamping seat, a support arm and an articulated seat, one end of the support arm is provided with the clamping seat, the other end of the support arm is hinged to the sliding seat through the articulated seat, and an electric cutting saw is fixedly clamped on the clamping seat.

[0008] Preferably, the slide seat comprises a slide seat body, an outer pulley and an inner pulley, and the outer pulley and the inner pulley are respectively installed on the left and right sides of the bottom of the slide seat body, and the outer pulley and the inner pulley clamp the elliptical track together and realize sliding fit on the elliptical track.

[0009] Preferably, the outer pulley and the inner pulley have the same structure, and the side walls thereof are both provided with sliding grooves, and the inner and outer edges of the elliptical track are provided with convex rings, and the sliding grooves are slidably engaged with the convex rings.

[0010] Preferably, a clamping part is provided on one side of the clamping seat, and the clamping seat and the clamping part clamp the electric cutting saw, and the clamping seat and the clamping part are fixedly connected by bolts.

[0011] Preferably, the neck and shoulder pillow is made of blister material.

[0012] The present invention has the following beneficial effects:

[0013] 1. The present invention greatly improves the work efficiency of forensic doctors and reduces their workload while ensuring the use function and effect of the existing craniotomy saw;

[0014] 2. The elliptical slide rail of the present invention serves as a track to guide and support the electric saw, so that the forensic doctor does not need to change his posture during the operation, and only needs to make auxiliary adjustments to complete the craniotomy work, which reduces the operational difficulty of the forensic work, shortens the cutting time, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a stereoscopic view of a new type of fixed forensic craniotomy saw;

[0016] Figure 2 This is a diagram of the use status of a new type of fixed forensic craniotomy saw;

[0017] Figure 3 yes Figure 2 A magnified image of point A;

[0018] Figure 4 is a three-dimensional diagram of the clamp of the present invention;

[0019] Figure 5 It is the front view of a new type of fixed forensic craniotomy saw;

[0020] Figure 6 It is a side view of a new type of fixed forensic craniotomy saw;

[0021] In the figure, 1-neck and shoulder pillow, 2-fixed bracket, 3-elliptical track, 4-sliding seat, 5-clamp, 6-electric cutting saw, 31-convex ring, 41-sliding seat body, 42-outer pulley, 43-inner pulley, 44-sliding slot, 51-clamping seat, 52-support arm, 53-hinge seat, 511-clamping seat, 512-clamping part, 513-bolt. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0023] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection is a non-detachable connection including but not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: a fixed connection is selected as a welding connection, and a detachable connection is selected as a hinge connection.

[0024] Specific implementation method 1: Combination Figure 1-Figure 6 The present embodiment is described. A novel fixed forensic craniotomy saw of the present embodiment comprises a neck and shoulder pillow 1, a fixed support 2, an elliptical track 3, a slide 4, a clamp 5 and an electric saw 6. The top of the neck and shoulder pillow 1 is provided with a fixed support 2, the top of the fixed support 2 is provided with an elliptical track 3, the slide 4 is slidably mounted on the elliptical track 3, and the electric saw 6 is mounted on the slide 4 through the clamp 5. The neck and shoulder pillow 1 is used to fix the body position so as to place the skull in a ready position to be cut, the saw blade angle of the electric saw 6 is adjusted to the position to be cut, and the handle of the electric saw 6 is held so that the electric saw 6 follows the elliptical track 3 for cutting.

[0025] The clamp 5 includes a clamping seat 511, a support arm 52 and an articulated seat 53. The clamping seat 511 is provided at one end of the support arm 52, and the other end of the support arm 51 is hinged to the slide 4 through the articulated seat 53. An electric cutting saw 6 is fixedly clamped on the clamping seat 511. When the handle end of the electric cutting saw 6 is held, the angle of the electric saw can be manually adjusted according to the needs during cutting due to the articulated cooperation between the support arm 51 and the slide 4.

[0026] The slide 4 includes a slide body 41, an outer pulley 42 and an inner pulley 43. The outer pulley 42 and the inner pulley 43 are respectively installed on the left and right sides of the bottom of the slide body 41. The outer pulley 42 and the inner pulley 43 clamp the elliptical track 3 together and realize sliding fit on the elliptical track 3.

[0027] The outer pulley 42 and the inner pulley 43 have the same structure, and the side walls thereof are both provided with a sliding slot 44 . The inner and outer edges of the elliptical track 3 have convex rings 31 , and the sliding slot 44 is slidably engaged with the convex ring 31 .

[0028] A clamping portion 512 is disposed on one side of the clamping seat 511 , and the clamping seat 511 and the clamping portion 512 clamp the electric saw 6 , while the clamping seat 511 and the clamping portion 512 are fixedly connected by bolts 513 .

[0029] The clamp 5 is made of stainless steel, which ensures mechanical strength and prevents rust.

[0030] The neck and shoulder pillow 1 is made of blister material. The neck and shoulder pillow 1 is made of plastic material into a square light-colored neck and shoulder pillow that conforms to the shape of the body structure. Its width is the same as the shoulder width of a standard height, which conforms to ergonomics. The blister material is an insulating material, which can ensure sufficient insulation during the operation of the device to protect the operator. The color of the neck and shoulder pillow 1 is white or light blue, which is convenient for identifying impurities and wiping and cleaning after use. The bottom of the fixed bracket 2 is connected to the neck and shoulder pillow 1, and a metal cover is used. The distance between the neck and shoulder pillow 1 and the fixed bracket 2 can be adjusted to ensure that it can be adjusted according to the needs of forensic operation during the operation.

[0031] The fixed bracket 2 is a metal bracket, specifically an approximately elliptical shape of two semicircles plus two straight lines, and is made by turning, rough grinding, heat treatment, and fine grinding of carbon steel billets. A threaded hole is processed on the fixed bracket 2 to fix it to the neck and shoulder pillow 1. The elliptical track 3 is installed on this bracket and is also fixed with a circle of screws, which ensures the mechanical strength requirements and reduces the overall weight.

[0032] The elliptical track 3 is made of stainless steel, which reduces friction, has good wear resistance and is easy to clean. At the same time, since craniotomy requires elliptical cutting, the fixed bracket and the elliptical track 3 are designed to be elliptical to ensure that the electric cutting saw 6 performs circular motion on the elliptical track.

[0033] In the design process of this embodiment, a large amount of skull data was referred to, and the horizontal width and vertical length of the fixed bracket 2 were designed to be 230 mm, 330 mm, and the thickness was designed to be 30 mm considering the installation of the elliptical track 3 inside the bracket. Spraying and electroplating processes were used to prevent pollution and rust.

[0034] The input power of the electric saw 6 is an AC 220V / 50Hz or a DC 12V power supply, with a rated power greater than 80w, a rated torque greater than 0.09Nm, a rated speed greater than 8000r / min, a main machine mass less than 2.0Kg, an oscillating operation mode, a saw blade hardness of 50HRC-60HRC, and a surface temperature of the saw body less than 52°C after the craniotomy saw works continuously at full load for 30min. The maximum working noise should be less than 90dB when detected by a sound level meter at a distance of 1000mm from the craniotomy saw working at full load. The insulation resistance between the metal part of the craniotomy saw shell and the power input end is greater than 20MΩ when subjected to a DC voltage of 500V. There is no flickering or breakdown after one minute between the metal part of the craniotomy saw shell and the power input end when subjected to an AC voltage of 700V. The accessories include a wrench, a fuse, a spare saw blade, and auxiliary materials include a brush, lubricating oil, etc. The electric saw 6 has a fast cutting speed, does not damage soft tissue, does not splash blood and bone powder, and is convenient for cleaning and disinfection.

[0035] The specific use steps of the novel fixed forensic craniotomy saw in this embodiment are as follows:

[0036] Step 1: Open the aluminum alloy box and take out the fixed forensic craniotomy saw.

[0037] Step 2, check the condition of the device: check whether the neck and shoulder pillow 1, the fixed bracket 2, the elliptical track 3, the slide 4, the clamp 5 and the electric saw 6, wherein the electric saw 6 includes a power converter, a battery, a charger, a saw blade, a power cord, a fuse, a metal chassis, a wrench, a cleaning brush and lubricating oil, as well as gloves, etc., are damaged.

[0038] Step 3, check the power supply AC / DC: Check whether there is an AC 220V, 50Hz socket near the operating position. If not, check the power of the battery of the electric cutting saw 6 DC 12V to determine whether the operation can be completed.

[0039] Step 4, power on and test run the electric cutting saw 6: Check whether the electric cutting saw 6 is operating normally, that is, insert the power plug of the electric cutting saw 6 into the output jack of the battery. If the green indicator light is on, it means that the power is sufficient. If the red indicator light is on, it means that the power is insufficient, you should stop using it and charge it immediately; push the power button on the electric cutting saw 6 to turn it on, and reset the power button to stop it; if a low voltage alarm occurs during DC operation and the red light flashes, you should stop using it and charge it immediately.

[0040] Step 5, power off and test run the electric saw 6: turn off the power after the test run is completed.

[0041] Step 6: Move the body to a suitable position, such as a flat ground or table.

[0042] Step 7, place the neck and shoulder part of the body on the neck and shoulder pillow 1 of the device.

[0043] Step 8, installing the fixed bracket 2: adjust the fixed bracket 2 of the device to make it in a semi-inclined position, and the adjustment angle is determined by the forensic doctor according to actual needs.

[0044] Step 9, adjust the slide 4 and the clamp 5 on the fixed bracket 2 to adjust the angle of the electric saw 6 so that it fits the skull cutting position and then tighten the screws of the fixed legs. Before starting the electric saw 6, the smoothness of the elliptical track 3 should be tried to ensure that there is no jamming during the cutting process.

[0045] Step 10, manually rotate the electric saw 6 along the predetermined track of the elliptical track 3 for one circle, and analyze whether its cutting track meets the cutting requirements.

[0046] Step 11, the electric saw 6 is powered on.

[0047] Step 12: The forensic doctor begins the craniotomy operation.

[0048] Step 13, stop the machine after cutting is completed.

[0049] Step 14, adjust the angles of the return seat 4 and the clamp 5, and restore the electric saw 6 to the initial position.

[0050] Step 15, loosen the bolt 513 of the clamp 5 and restore the clamp 5 to its initial position.

[0051] Step 16, restore the fixed bracket 2 to the initial position.

[0052] Step 17, after power off, clean the electric saw 6, the fixed bracket 2, the neck and shoulder pillow 1 and other corresponding devices and pack them.

[0053] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the present invention will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the present invention.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new type of fixed forensic craniotomy saw, characterized by: The invention comprises a neck and shoulder pillow (1), a fixed bracket (2), an elliptical track (3), a slide seat (4), a clamp (5) and an electric saw (6); the top of the neck and shoulder pillow (1) is provided with a fixed bracket (2); the top of the fixed bracket (2) is provided with an elliptical track (3); the slide seat (4) is slidably mounted on the elliptical track (3); and the electric saw (6) is mounted on the slide seat (4) through the clamp (5).

2. A novel fixed forensic craniotomy saw according to claim 1, characterized in that: The clamp (5) comprises a clamping seat (51), a support arm (52) and an articulated seat (53); one end of the support arm (52) is provided with the clamping seat (51); the other end of the support arm (51) is hinged to the slide seat (4) via the articulated seat (53); and an electric cutting saw (6) is fixedly clamped on the clamping seat (51).

3. A novel fixed forensic craniotomy saw according to claim 2, characterized in that: The slide seat (4) comprises a slide seat body (41), an outer pulley (42) and an inner pulley (43). The outer pulley (42) and the inner pulley (43) are respectively installed on the left and right sides of the bottom of the slide seat body (41). The outer pulley (42) and the inner pulley (43) jointly clamp the elliptical track (3) and realize sliding fit on the elliptical track (3).

4. A novel fixed forensic craniotomy saw according to claim 3, characterized in that: The outer pulley (42) and the inner pulley (43) have the same structure, and their side walls are both provided with a sliding groove (44). The inner and outer edges of the elliptical track (3) have a convex ring (31), and the sliding groove (44) is slidably engaged with the convex ring (31).

5. A novel fixed forensic craniotomy saw according to claim 4, characterized in that: A clamping portion (512) is provided on one side of the clamping seat (51), and the clamping seat (511) and the clamping portion (512) clamp the electric cutting saw (6), and the clamping seat (511) and the clamping portion (512) are fixedly connected by bolts (513).

6. A novel fixed forensic craniotomy saw according to claim 5, characterized in that: The neck and shoulder pillow (1) is made of blister material.

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