Breast lesion tissue sampling biopsy positioning device
By designing a breast lesion tissue sampling and biopsy positioning device and utilizing multiple positioning mechanisms and a three-axis coordinate system, the problem of unstable sample position was solved, and precise fixation and multi-directional positioning of breast lesion tissue were achieved, ensuring the accuracy of pathological detection.
Patent Information
- Application Number
- CN202422107473.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-08-29
AI Technical Summary
In the existing technology, the position of breast lesion tissue is not fixed after sampling, and the movement of the sample causes the marking points to be misplaced. Only the sutures can be detected, and there is a lack of complete evaluation of the six surfaces, which leads to biased pathological results.
A breast lesion tissue sampling and biopsy positioning device is designed, which includes an outer box body and an inner box body. The inner box body is equipped with a positioning base and multiple sets of side positioning mechanisms. Four-way positioning is achieved through a lifting cylinder and a telescopic rod. Combined with a three-axis coordinate system and multiple sets of positioning pins, the sample is firmly fixed and the positioning is accurate.
It achieves precise fixation and multi-directional positioning of breast lesion tissue, avoids sample dislocation and movement, ensures the accuracy of pathological detection, and reduces bias in pathological results.
Smart Images

Figure CN223408412U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of pathological tissue sample storage equipment, in particular to a breast pathological tissue sampling and biopsy positioning device. Background Art
[0002] When clinical surgeons send breast lesions to the pathology department for testing, they often have specific requirements for the specimens, requiring them to be marked on all six sides, including up and down, left and right, and front and back, to facilitate the examination of different locations. Currently, clinical surgeons typically use different colored needles and thread to mark and locate different locations of the breast lesions. However, even after marking the lesions, the specimens still suffer from issues such as unstable positioning, misalignment of marking points when the specimen is moved, and limited testing of the sutures, lacking a complete assessment of all six sides. Utility Model Content
[0003] The purpose of the utility model is to provide a breast disease tissue sampling and biopsy positioning device, which can conveniently fix breast disease tissue, is not only simple to operate, but also has accurate and firm positioning, avoiding the misplacement of the sample to be tested and the bias of the pathological results caused by only detecting the sutures.
[0004] The purpose of the utility model is achieved as follows: a breast lesion tissue sampling and biopsy positioning device, comprising an outer box body and an inner box body, the inner box body is arranged in the outer box body, a positioning base is arranged inside the inner box body, a partition cavity is left between the outer box body and the inner box body, four groups of side positioning mechanisms are respectively arranged in the partition cavity and distributed in sequence along the front, back, left and right directions, the height of the inner box body is lower than the height of the outer box body, an upper positioning mechanism is correspondingly provided on the inner box body, and an outer cover plate that can close the outer box body is provided on the upper part of the outer box body.
[0005] As a further improvement of the present invention, the outer box body and the inner box body are both rectangular, the outer box body includes a rectangular bottom plate, four outer rectangular plates are vertically arranged around the bottom plate, the outer cover plate is rotatably connected to the outer plate at the rear, and the inner box body includes four vertical inner plates that are rectangular, the inner and outer plates are both rectangular, and the bottom of the inner plate is fixed to the bottom plate.
[0006] As a further improvement of the present invention, the partition cavity between the outer box body and the inner box body is in the shape of a "U". The spacing between the outer plate and the inner plate on the left side is equal to the spacing between the outer plate and the inner plate on the right side, and the spacing between the outer plate and the inner plate on the front side is equal to the spacing between the outer plate and the inner plate on the rear side.
[0007] As a further improvement of the present invention, a buckle is provided on the front edge of the outer cover, and a slot is provided on the front side of the outer box body corresponding to the buckle. When the outer cover is closed, the buckle is embedded in the slot to prevent the outer cover from being loosened when closed.
[0008] In order to support and fix the bottom of the sample to be tested, the positioning base is triangular and is arranged in the middle of the bottom plate. A positioning protrusion is provided at each of the three top corners of the positioning base, and the positioning protrusion is in the shape of a triangular pyramid.
[0009] To position the sample to be tested from four directions, front, back, left, and right, four sets of side positioning mechanisms are positioned on each side of the U-shaped partition chamber. These side positioning mechanisms include a lifting cylinder positioned between the corresponding outer and inner plates. The axis of the lifting cylinder is perpendicular to the corresponding inner plate. A telescopic rod is axially positioned within the lifting cylinder. A side positioning ball is positioned at the front end of the telescopic rod. A side positioning pin is positioned at the front end of the side positioning ball. The side positioning pin is conical in shape. Extension holes are provided at the front end of the lifting cylinder, corresponding to the side positioning ball and pin. An internal lifting slot is vertically provided on the inner plate, corresponding to the side positioning pin. The height of the lifting cylinder can be adjusted. The telescopic rod passes through the extension hole and the internal lifting slot. The four side positioning pins position the sample to be tested from four directions, front, back, left, and right. The side positioning ball positions the sample when it contacts it. The four side positioning balls and pins are colored differently, making it easier to identify the different positions of the sample.
[0010] To axially position the telescopic rod, the lifting cylinder includes an outer cylinder body, with front and rear plates respectively provided at the front and rear ends of the outer cylinder body. Extension holes are provided in the corresponding front plates. The outer circumference of the telescopic rod is provided with an outer step corresponding to the inner wall of the outer cylinder body. A spring is provided between the outer step and the rear plate, which is sleeved around the outer circumference of the telescopic rod. A nut is fixed to the upper side of the outer cylinder body, and a vertical screw is threaded onto the nut. The lower end of the screw passes through the outer cylinder body and extends downward into the outer cylinder body, blocking the outer step. A coaxial transition rod is fixed to the upper end of the screw rod, and a coaxial gripping rod is fixed to the upper end of the transition rod. The outer diameters of the screw rod, transition rod, and gripping rod are arranged in increasing order. When the four sides of the sample to be tested need to be positioned, the gripping rod is used to rotate the screw rod, causing the screw rod to rise, and the telescopic rod can be moved forward. The side positioning pin is inserted into the sample to be tested for positioning.
[0011] To adjust the height of the lifting cylinder up and down, a lifting slider is fixed to the rear side of the rear plate. A corresponding outer lifting slot is vertically defined on the outer plate corresponding to the lifting slider. Guide blocks are provided on both sides of the lifting slider, the thickness of which is smaller than that of the lifting slider. Vertical guide slots are defined on both sides of the corresponding outer plate, located on the left and right sides of the lifting slot, and the guide slots are matched to the guide blocks. An outer baffle is fixed to the outer side of the lifting slider, which fits in contact with the outer plate. The width of the outer baffle is greater than the spacing between the two guide blocks. U-shaped lifting handles are provided at the upper and lower surfaces of the outer baffle. The outer baffle has two symmetrical vertical waist-shaped slots or two rows of symmetrical positioning holes. Fixing bolts pass through the corresponding waist-shaped slots or positioning holes and are threadedly connected to the outer plate. The rear end of the telescopic rod passes through the rear plate, the lifting slider, and the outer baffle in sequence. A gripping handle is provided at the extended end of the telescopic rod. After loosening the fixing bolts, the lifting cylinder's position can be adjusted up and down using the lifting handles, and then the fixing bolts are threadedly connected to the outer plate. The gripping handles can be used to pull the telescopic rod outward, facilitating the removal of samples to be tested.
[0012] In order to accurately locate the position of the sample to be tested, a three-axis coordinate system is set in the inner box body, and the three-axis coordinate system includes an X axis, a Y axis and a Z axis.
[0013] To secure the upper portion of the sample to be tested, a support is provided on the top front side of the inner box. An L-shaped positioning rod is hingedly connected to the support. A lower positioning ball is located at the front end of the positioning rod, and a lower positioning pin is located at the front end of the lower positioning ball. The lower positioning pin is conical in shape. Before the sample to be tested enters the inner box, the positioning rod is rotated outward until it rests on the outer box. After the sample to be tested enters the inner box, the positioning rod is rotated to secure the upper portion of the sample to be tested with the lower positioning pin.
[0014] When the utility model is used, after opening the outer cover, first rotate the positioning rod outward to support it on the outer box body, and then fix the bottom support of the sample to be tested on the positioning base. Then, according to the volume specification and height position of the breast lesion tissue of the sample to be tested, loosen the fixing bolt, adjust the position of the lifting cylinder up and down through the lifting handle, and then screw the fixing bolt to the outer plate to achieve the lifting and adjustment of the height position of the lifting cylinder, so that the telescopic rod corresponds to the side of the sample to be tested, and rotate the screw by the gripping rod to make the screw rise, and the telescopic rod can move forward. The telescopic rod passes through the extension hole and the inner lifting groove, and the four side positioning pins respectively position the sample to be tested in the four directions of front, back, left and right. The side positioning balls touch the sample to position it. The four side positioning balls and side positioning pins are different in color, which is convenient for identifying different positions of the sample; by rotating the positioning rod, the upper part of the sample to be tested can be fixed with the lower positioning pin; finally, the outer cover can be closed. Compared with the existing technology, the beneficial effect of the present invention is that it can conveniently fix breast diseased tissue. It is not only simple to operate, but also has accurate coordinate positioning and firmly positions the sample through multiple sets of positioning mechanisms, avoiding the misplacement of the sample to be tested and the bias of the pathological results caused by only detecting the sutures. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional structural diagram of the outer box body and the inner box body of the present utility model.
[0016] Figure 2 It is a vertical cross-sectional view of the outer box body and the inner box body.
[0017] Figure 3 for Figure 2 A partial enlarged view of .
[0018] Figure 4 It is a horizontal cross-sectional view of the outer box body and the inner box body.
[0019] Figure 5 A cross-sectional view of the lifting slider and outer plate.
[0020] Figure 6 It is a three-dimensional structural diagram of the lifting slider.
[0021] Figure 7 This is the front view of the outer panel.
[0022] Figure 8 It is a structural diagram of the bottom plate and the inner box body.
[0023] Figure 9 This is another structural diagram of the present utility model.
[0024] Among them, 1 outer box body, 1a bottom plate, 1b outer plate, 2 inner box body, 2a inner plate, 3 positioning base, 4 partition chamber, 5 outer cover, 5a buckle, 6 slot, 7 positioning protrusion, 8 lifting cylinder, 8a outer cylinder, 8b front end plate, 8c rear end plate, 9 telescopic rod, 9a outer step, 9b grasping handle, 10 side positioning ball, 11 side positioning needle, 12 extending hole, 13 inner lifting groove, 14 spring, 15 nut, 16 screw, 16a transition rod, 16b grasping rod, 17 lifting slider, 17a guide block, 18 outer lifting groove, 19 guide groove, 20 outer baffle, 21 lifting handle, 22 waist groove, 23 positioning hole, 24 fixing bolt, 25X axis, 26Y axis, 27Z axis, 28 support, 29 positioning rod, 29a lower positioning ball, 29b lower positioning needle. DETAILED DESCRIPTION Example 1
[0025] like Figure 1-8 The figure shows a positioning device for sampling and biopsy of breast lesion tissue, comprising an outer box body 1 and an inner box body 2. The inner box body 2 is disposed within the outer box body 1, and a positioning base 3 is disposed within the inner box body 2. A partition chamber 4 is provided between the outer box body 1 and the inner box body 2. The partition chamber 4 is provided with four sets of side positioning mechanisms distributed sequentially in the front, back, left, and right directions. The height of the inner box body 2 is lower than that of the outer box body 1, and the inner box body 2 is provided with a corresponding upper positioning mechanism. The upper portion of the outer box body 1 is provided with an outer cover plate 5 that can close the outer box body 1. Both the outer box body 1 and the inner box body 2 are rectangular. The outer box body 1 includes a rectangular bottom plate 1a, and four rectangular outer plates 1b are vertically disposed around the bottom plate 1a. The outer cover plate 5 is rotatably connected to the rear outer plate 1b. The inner box body includes four vertical inner side plates 2a that form a rectangle. The inner plates 2a and the outer plates 1b are both rectangular, and the bottoms of the inner plates 2a are fixed to the bottom plate 1a. The partition chamber 4 between the outer box body 1 and the inner box body 2 is shaped like a U.S. character. The spacing between the outer panel 1b and the inner panel 2a on the left side is equal to that between the outer panel 1b and the inner panel 2a on the right side. The spacing between the outer panel 1b and the inner panel 2a on the front side is equal to that between the outer panel 1b and the inner panel 2a on the rear side. A latch 5a is provided on the front edge of the outer cover 5, and a slot 6 is provided on the front side of the outer box body 1 corresponding to the latch 5a. When the outer cover 5 is closed, the latch 5a engages with the slot 6, preventing it from loosening.
[0026] In order to support and fix the bottom of the sample to be tested, the positioning base 3 is triangular and is arranged in the middle of the bottom plate 1a. A positioning protrusion 7 is provided at each of the three top corners of the positioning base 3. The positioning protrusion 7 is in the shape of a triangular pyramid.
[0027] In order to position the sample to be tested from the front, back, left, and right directions, four sets of side positioning mechanisms are respectively arranged on the four sides of the "U"-shaped partition chamber 4. The side positioning mechanism includes a lifting cylinder 8 arranged between the corresponding outer plate 1b and the inner plate 2a. The axis of the lifting cylinder 8 is perpendicular to the corresponding inner plate 2a. A telescopic rod 9 is axially arranged in the lifting cylinder 8. The front end of the telescopic rod 9 is provided with a side positioning ball 10. The front end of the side positioning ball 10 is provided with a side positioning pin 11. The side positioning pin 11 is conical. The front end of the lifting cylinder 8 has an extension hole 12 corresponding to the side positioning ball 10 and the side positioning pin 11. The inner plate 2a has an internal lifting groove 13 vertically corresponding to the side positioning pin 11. The height position of the lifting cylinder 8 can be raised and lowered. The telescopic rod 9 passes through the extension hole 12 and the internal lifting groove 13. The four side positioning pins 11 respectively position the sample to be tested from the front, back, left, and right directions. The side positioning ball 10 positions the sample when it touches the sample. The four side positioning balls 10 and side positioning pins 11 are different colors to facilitate identification of different positions of the sample.
[0028] In order to axially position the telescopic rod 9, the lifting cylinder 8 includes an outer cylinder body 8a, and the front and rear ends of the outer cylinder body 8a are respectively provided with a front end plate 8b and a rear end plate 8c, and the extension hole 12 is opened on the corresponding front end plate 8b, and the outer periphery of the telescopic rod 9 is provided with an outer step 9a, and the outer step 9a corresponds to the inner wall of the outer cylinder body 8a, and a spring 14 is provided between the outer step 9a and the rear end plate 8c, which is sleeved on the outer periphery of the telescopic rod 9. A nut 15 is fixed on the upper side of the outer cylinder body 8a, and a vertical screw 16 is threadedly connected to the nut 15. The lower end of the screw 16 passes through the outer cylinder body 8a and extends downward into the outer cylinder body 8a and blocks the outer step 9a. A coaxial transition rod 16a is fixed to the upper end of the screw 16, and a coaxial gripping rod 16b is fixed to the upper end of the transition rod 16a. The outer diameters of the screw 16, transition rod 16a and gripping rod 16b are arranged in increasing order. When it is necessary to locate the four sides of the sample to be tested, the screw 16 is rotated by the gripping rod 16b, so that the screw 16 rises, the telescopic rod 9 can move forward, and the side positioning pin 11 is inserted into the sample to be tested for positioning. In order to adjust the height position of the lifting cylinder 8 up and down, a lifting slider 17 is fixed to the rear side of the rear end plate 8c, and an outer lifting groove 18 is vertically opened on the corresponding outer plate 1b corresponding to the lifting slider 17. Guide blocks 17a are provided on the left and right sides of the lifting slider 17. The thickness of the guide block 17a is less than that of the lifting slider 17. Vertical guide grooves 19 are opened on the left and right sides of the lifting groove on the corresponding outer plate 1b. The guide grooves 19 are matched with the guide blocks 17a. The outer side of the lifting slider 17 is fixed with The outer baffle 20 is fitted against the outer panel 1b. Its width is greater than the distance between the two guide blocks 17a. U-shaped lifting handles 21 are located on both the upper and lower surfaces of the outer baffle 20. Two symmetrical vertical waist-shaped grooves 22 are defined on the outer baffle 20. Fixing bolts 24 extend through the corresponding waist-shaped grooves 22 and are threadedly connected to the outer panel 1b. The rear end of the telescopic rod 9 passes through the rear end panel 8c, the lifting slider 17, and the outer baffle 20 in sequence. A gripping handle 9b is provided at the extended end of the telescopic rod 9. After loosening the fixing bolts 24, the lifting handle 21 is used to adjust the position of the lifting cylinder 8 up and down. The fixing bolts 24 are then threadedly connected to the outer panel 1b to secure the position. The telescopic rod 9 can be pulled outward using the gripping handle 9b to facilitate the removal of the sample to be tested.
[0029] To secure the upper portion of the sample to be tested, a support 28 is provided at the top front of the inner box body 2. An L-shaped positioning rod 29 is hingedly connected to the support 28. A lower positioning ball 29a is located at the front end of the positioning rod 29, and a lower positioning pin 29b is located at the front end of the lower positioning ball 29a. The lower positioning pin 29b is conical in shape. Before the sample to be tested enters the inner box body 2, the positioning rod 29 is rotated outward until it rests on the outer box body 1. After the sample to be tested enters the inner box body 2, the positioning rod 29 is rotated to secure the upper portion of the sample to be tested with the lower positioning pin 29b.
[0030] In order to accurately locate the position of the sample to be tested, a three-axis coordinate system is provided in the inner box body 2 , and the three-axis coordinate system includes an X-axis 25 , a Y-axis 26 and a Z-axis 27 .
[0031] When the present invention is used, after opening the outer cover 5, the positioning rod 29 is first rotated outward to support the outer box body 1, and then the bottom support of the sample to be tested is fixed on the positioning base 3. Then, according to the volume specification height position of the breast lesion tissue of the sample to be tested, the fixing bolt 24 is loosened, and the position of the lifting cylinder 8 is adjusted up and down by the lifting handle 21, and then the fixing bolt 24 is threadedly connected and fixed with the outer plate 1b to achieve the height adjustment of the lifting cylinder 8 so that the telescopic rod 9 corresponds to the side of the sample to be tested. The screw 16 is rotated by the gripping rod 16b to make the screw 16 rise, and the telescopic rod 9 can move forward. The telescopic rod 9 passes through the extension hole 12 and the inner lifting groove 13. The four side positioning pins 11 respectively position the sample to be tested in the four directions of front, back, left and right. The side positioning ball 10 is positioned when it touches the sample. The four side positioning balls 10 and the side positioning pins 11 are different in color, which is convenient for identifying different positions of the sample; by rotating the positioning rod 29, the upper part of the sample to be tested can be fixed with the lower positioning pin 29b; finally, the outer cover 5 can be closed. The advantages of the present invention are that it can conveniently fix breast lesion tissue, is not only simple to operate, but also has accurate coordinate positioning and firmly positions the sample through multiple sets of positioning mechanisms, avoiding the misplacement of the sample to be tested and the bias of the pathological results caused by only detecting the sutures. Example 2
[0032] like Figure 9 The difference from Example 1 is that two rows of symmetrical positioning holes 23 are opened on the outer baffle 20, and the fixing bolts 24 pass through the corresponding positioning holes 23 and are threadedly connected to the outer plate 1b.
[0033] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the present invention, technicians in this field can make some substitutions and deformations of some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present invention.
Claims
1. A breast lesion tissue sampling and biopsy positioning device, characterized in that: The utility model comprises an outer box body and an inner box body, wherein the inner box body is arranged in the outer box body, a positioning base is arranged inside the inner box body, a partition cavity is left between the outer box body and the inner box body, and four groups of side positioning mechanisms are respectively arranged in the partition cavity and distributed in sequence along the front, back, left and right directions. The height of the inner box body is lower than that of the outer box body, and an upper positioning mechanism is correspondingly arranged on the inner box body. The upper part of the outer box body is provided with an outer cover plate that can close the outer box body.
2. A breast lesion tissue sampling and biopsy positioning device according to claim 1, characterized in that: The outer box body and the inner box body are both rectangular. The outer box body includes a rectangular bottom plate. Four outer panels in the shape of a rectangle are vertically arranged around the bottom plate. The outer cover plate is rotatably connected to the outer panel at the rear. The inner box body includes four vertical inner panels in the shape of a rectangle. Both the inner and outer panels are rectangular. The bottom of the inner panel is fixed to the bottom plate.
3. A breast lesion tissue sampling and biopsy positioning device according to claim 2, characterized in that: The partition cavity between the outer box body and the inner box body is in the shape of a "U". The spacing between the outer plate and the inner plate on the left side is equal to the spacing between the outer plate and the inner plate on the right side, and the spacing between the outer plate and the inner plate on the front side is equal to the spacing between the outer plate and the inner plate on the rear side.
4. A breast lesion tissue sampling and biopsy positioning device according to any one of claims 1 to 3, characterized in that: A buckle is provided on the front edge of the outer cover plate, and a slot is provided on the front side of the outer box body corresponding to the buckle.
5. A breast lesion tissue sampling and biopsy positioning device according to claim 2 or 3, characterized in that: The positioning base is triangular in shape and is arranged in the middle of the bottom plate. A positioning protrusion is provided at each of the three top corners of the positioning base, and the positioning protrusion is in the shape of a triangular pyramid.
6. The breast lesion tissue sampling and biopsy positioning device according to claim 3, characterized in that: The four groups of side positioning mechanisms are respectively arranged on the four sides of the "U"-shaped separation cavity, and the side positioning mechanism includes a lifting cylinder arranged between the corresponding outer plate and the inner plate. The axis of the lifting cylinder is perpendicular to the corresponding inner plate. A telescopic rod is axially arranged in the lifting cylinder, and a side positioning ball is arranged at the front end of the telescopic rod. A side positioning needle is arranged at the front end of the side positioning ball. The side positioning needle is conical, and an extension hole is opened at the front end of the lifting cylinder corresponding to the side positioning ball and the side positioning needle, and an inner lifting groove is vertically opened on the inner plate corresponding to the side positioning needle.
7. The breast lesion tissue sampling and biopsy positioning device according to claim 6, characterized in that: The lifting cylinder includes an outer cylinder body, and the front and rear ends of the outer cylinder body are respectively provided with a front end plate and a rear end plate, and the extension hole is opened on the corresponding front end plate. The outer periphery of the telescopic rod is provided with an outer step, and the outer step corresponds to the inner wall of the outer cylinder. A spring is provided between the outer step and the rear end plate and is sleeved on the outer periphery of the telescopic rod. A nut is fixed on the upper side of the outer cylinder body, and a vertical screw is threadedly connected to the nut. The lower end of the screw passes through the outer cylinder body and extends downward into the outer cylinder body and blocks the outer step. A coaxial transition rod is fixed to the upper end of the screw rod, and a coaxial gripping rod is fixed to the upper end of the transition rod. The outer diameters of the screw, transition rod and gripping rod are arranged in increasing order.
8. The breast lesion tissue sampling and biopsy positioning device according to claim 7, characterized in that: A lifting slider is fixed to the rear side of the rear end plate, and an outer lifting slot is vertically opened on the corresponding outer plate. Guide blocks are provided on the left and right sides of the lifting slider, and the thickness of the guide block is less than the thickness of the lifting slider. Vertical guide slots are opened on the corresponding outer plate on the left and right sides of the lifting slot, and the guide slots are matched with the guide blocks. An outer baffle is fixed to the outside of the lifting slider, and the outer baffle is in contact with the outer plate. The width of the outer baffle is greater than the spacing between the two guide blocks. U-shaped lifting handles are provided on the upper and lower parts of the outer baffle surface, and two left-right symmetrical vertical waist grooves or two rows of left-right symmetrical positioning holes are opened on the outer baffle. The fixing bolts pass through the corresponding waist grooves or positioning holes and are threadedly connected to the outer plate; the rear end of the telescopic rod passes through the rear end plate, the lifting slider and the outer baffle in sequence, and the protruding end of the telescopic rod is provided with a gripping handle.
9. The breast lesion tissue sampling and biopsy positioning device according to claim 8, characterized in that: A three-axis coordinate system is provided in the inner box body, and the three-axis coordinate system includes an X-axis, a Y-axis and a Z-axis.
10. A breast lesion tissue sampling and biopsy positioning device according to claim 2 or 3, characterized in that: A support is provided on the front side of the top of the inner box body, an L-shaped positioning rod is hinged on the support, a lower positioning ball is provided at the front end of the positioning rod, a lower positioning pin is provided at the front end of the lower positioning ball, and the lower positioning pin is conical.