Pen-shaped ionization chamber probe positioning support

Abstract

The utility model discloses a pen-shaped ionization chamber probe positioning support, which relates to the technical field of positioning supports and comprises a positioning hollow ring, a first measuring scale is fixed on the outer side of the positioning hollow ring, and a second measuring scale is rotatably connected on the outer side of the positioning hollow ring and located at the upper end of the first measuring scale. Hand-screwing screws are symmetrically in threaded connection with the interior of the positioning hollow ring and located at the upper end of the second measuring ruler, guide grooves are symmetrically formed in the interior of the second measuring ruler and located on the outer side of the positioning hollow ring, and limiting sliding seats are slidably connected to the inner sides of the two guide grooves. According to the pen-shaped ionization chamber probe positioning support provided by the utility model, the first measuring scale and the second measuring scale are in a mutually vertical state by rotating and unfolding the second measuring scale, and the positioning hollow ring is conveniently ensured to be placed at the center of the circular opening by using the scale marks on the first measuring scale and the second measuring scale; the pen-shaped ionization chamber probe can be conveniently clamped and fixed by rotating the two hand-twisted screw rods to be matched with the fastening head.

Description

Technical Field

[0001] This utility model relates to the field of positioning bracket technology, and in particular to a positioning bracket for a pen-shaped ionization chamber probe. Background Technology

[0002] Breast CBCT is a medical imaging technology used for breast cancer screening. It uses low-dose X-rays to scan the breast. In dose detection in breast CBCT, the ionization chamber is a commonly used dose measurement instrument.

[0003] The average dose of breast tissue requires placing the pen-shaped ionization chamber probe at the center of rotation of the exposure frame. The probe position is adjusted by positioning the image so that the effective detection area of ​​the probe is exactly within the X-ray range.

[0004] To place the pencil-shaped ionization chamber probe within the circular opening of the examination bed, between the X-ray tube and the image receiver, no other items besides the dosimeter probe and safety cover can be placed. Therefore, it is difficult to fix the probe in place, and there is a risk of it falling. Furthermore, adjusting the probe position by scanning positioning images multiple times to ensure that it is placed in the center of the circular opening on the examination bed consumes monitoring time and increases unnecessary exposure of the equipment. Therefore, this application proposes a positioning bracket for the pencil-shaped ionization chamber probe. Utility Model Content

[0005] Based on this, it is necessary to provide a pen-shaped ionization chamber probe positioning bracket to address the aforementioned technical problems. By unfolding the two support legs, it is convenient to support the positioning hollow ring, the first measuring scale, and the second measuring scale to be placed on the circular opening of the examination bed. The second measuring scale is rotated and unfolded so that the first and second measuring scales are perpendicular to each other. The scale lines on the first and second measuring scales can be used to ensure that the positioning hollow ring is placed in the center of the circular opening. After the pen-shaped ionization chamber probe is inserted through the positioning hollow ring and into the circular opening, the probe can be clamped by rotating the two hand-tightening screws and fastening heads to reduce the risk of falling.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A positioning bracket for a pencil-shaped ionization chamber probe, used for positioning and placing a pencil-shaped ionization chamber probe;

[0008] The device includes a positioning hollow ring. A first measuring scale is fixed to the outer side of the positioning hollow ring. A second measuring scale is rotatably connected to the outer side of the positioning hollow ring and above the first measuring scale. Hand-tightening screws are symmetrically threaded to the inner side of the positioning hollow ring and above the second measuring scale. One end of each hand-tightening screw and inside the positioning hollow ring is fixed with a fastening head. The other end of each hand-tightening screw and outside the positioning hollow ring is fixed with a support cylinder. Positioning pins are also symmetrically fixed to the outer side of the positioning hollow ring and above the second measuring scale. Guide grooves are symmetrically formed inside the second measuring scale and outside the positioning hollow ring. Limiting slides are slidably connected to the inner sides of each of the two guide grooves. The support cylinders and positioning pins are slidably connected to the limiting slides.

[0009] In a preferred embodiment of the pen-shaped ionization chamber probe positioning bracket provided by this utility model, guide posts are provided on the inner sides of both guide grooves, the guide posts are fixed to the second measuring ruler, and the limiting slide is located outside the guide posts and slidably connected to the guide posts.

[0010] As a preferred embodiment of the pen-shaped ionization chamber probe positioning bracket provided by this utility model, each guide post is fitted with a first spring on its outer side, one end of the two first springs is fixed to two limiting slides respectively, and the other end of the two first springs is fixed to a second measuring ruler.

[0011] As a preferred embodiment of the pen-shaped ionization chamber probe positioning bracket provided by this utility model, two bearing seats are fixed at the bottom of the first measuring ruler and on the outside of the positioning hollow ring. Each bearing seat has a support shaft fixed on its inner side, and a support leg is rotatably connected to the outside of the support shaft. A foot is fixed at the end of the support leg away from the support shaft.

[0012] As a preferred embodiment of the pen-shaped ionization chamber probe positioning bracket provided by this utility model, a mounting base is symmetrically fixed on the outer side of the positioning hollow ring and at the lower end of the first measuring scale. Both mounting bases are threaded with hand-tightening bolts, and the support legs are slidably connected to the hand-tightening bolts.

[0013] In a preferred embodiment of the pen-shaped ionization chamber probe positioning bracket provided by this utility model, each of the support legs is fixed with a support rod on both sides near the support shaft, and a first spur gear is fixed on the side of each support rod away from the support leg. Gear grooves are opened inside both sides of each bearing seat, and a second spur gear is slidably connected to the inside of the gear groove. The second spur gear meshes with the first spur gear. A second spring is also provided inside each gear groove. One end of the second spring is fixed to the second spur gear, and the other end of the second spring is fixed to the bearing seat.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The pen-shaped ionization chamber probe positioning bracket provided by this utility model facilitates the placement of the positioning hollow ring, the first measuring scale, and the second measuring scale on the circular opening of the examination bed after unfolding the two support legs. The second measuring scale is rotated and unfolded so that the first and second measuring scales are perpendicular to each other. The scale lines on the first and second measuring scales make it easy to ensure that the positioning hollow ring is placed in the center of the circular opening. After the pen-shaped ionization chamber probe is inserted through the positioning hollow ring and into the circular opening, the probe is clamped by rotating the two hand-tightening screws and fastening heads to reduce the risk of falling. Attached Figure Description

[0016] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the overall structure of the pen-shaped ionization chamber probe positioning bracket provided by this utility model;

[0018] Figure 2 A schematic diagram of the structure of the pen-shaped ionization chamber probe positioning bracket provided by this utility model when the second measuring ruler is not unfolded;

[0019] Figure 3 A schematic diagram of the lower end of the first measuring ruler of the pen-shaped ionization chamber probe positioning bracket provided by this utility model;

[0020] Figure 4 A schematic diagram of the structure of the pen-shaped ionization chamber probe positioning bracket provided by this utility model when the two support legs are unfolded;

[0021] Figure 5 This is a schematic diagram of the structure between the bearing seat and the support leg of the pen-shaped ionization chamber probe positioning bracket provided by this utility model.

[0022] The markings in the diagram are explained as follows:

[0023] 1. Hollow positioning ring; 2. First measuring scale; 3. Second measuring scale; 4. Hand-tightening screw; 5. Fastening head; 6. Support cylinder; 7. Positioning pin; 8. Guide groove; 9. Guide pin; 10. Limiting slide; 11. First spring; 12. Mounting base; 13. Hand-tightening bolt; 14. Bearing base; 15. Support shaft; 16. Support leg; 17. Support rod; 18. First spur gear; 19. Gear groove; 20. Second spur gear; 21. Second spring; 22. Support foot. Detailed Implementation

[0024] As described in the background art, the pen-shaped ionization chamber probe must be placed inside the circular opening on the examination table, between the X-ray tube and the image receiver. No other items can be placed except for the dosimeter probe and the safety cover. Therefore, it is difficult to fix the probe in place, and there is a risk of it falling. Furthermore, adjusting the probe position by scanning positioning images multiple times to ensure that it is placed in the center of the circular opening on the examination table will consume monitoring time and increase unnecessary exposure of the equipment.

[0025] To solve this technical problem, this utility model provides a pencil-shaped ionization chamber probe positioning bracket, which is used for positioning and placing a pencil-shaped ionization chamber probe.

[0026] The device includes a positioning hollow ring 1, a first measuring ruler 2 fixed to the outside of the positioning hollow ring 1, a second measuring ruler 3 rotatably connected to the outside of the positioning hollow ring 1 and above the first measuring ruler 2, a hand-tightening screw 4 symmetrically threaded to the inside of the positioning hollow ring 1 and above the second measuring ruler 3, a fastening head 5 fixed to one end of each hand-tightening screw 4 and inside the positioning hollow ring 1, a support cylinder 6 fixed to the other end of each hand-tightening screw 4 and outside the positioning hollow ring 1, a positioning post 7 symmetrically fixed to the outside of the positioning hollow ring 1 and above the second measuring ruler 3, guide grooves 8 symmetrically opened inside the second measuring ruler 3 and outside the positioning hollow ring 1, and a limit slide seat 10 slidably connected to the inside of each of the two guide grooves 8, with the support cylinder 6 and the positioning post 7 slidably connected to the limit slide seat 10.

[0027] The pen-shaped ionization chamber probe positioning bracket provided by this utility model places the positioning hollow ring 1, the first measuring ruler 2, and the second measuring ruler 3 on the circular opening of the examination bed. The second measuring ruler 3 is rotated and unfolded so that the first measuring ruler 2 and the second measuring ruler 3 are perpendicular to each other. The scale lines on the first measuring ruler 2 and the second measuring ruler 3 make it easy to ensure that the positioning hollow ring 1 is placed in the center of the circular opening. After the pen-shaped ionization chamber probe passes through the positioning hollow ring 1 and extends into the circular opening, the two hand-tightening screws 4 and the fastening head 5 are rotated to easily clamp the pen-shaped ionization chamber probe and reduce the risk of falling.

[0028] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] Example 1:

[0031] Please refer to Figure 1-5 A positioning bracket for a pen-shaped ionization chamber probe includes a positioning hollow ring 1. A first measuring scale 2 is fixed to the outer side of the positioning hollow ring 1. A second measuring scale 3 is rotatably connected to the outer side of the positioning hollow ring 1 and located above the first measuring scale 2. When the pen-shaped ionization chamber probe passes through the positioning hollow ring 1, in order to facilitate clamping, hand-tightening screws 4 are symmetrically threaded to the inner side of the positioning hollow ring 1 and located above the second measuring scale 3. One end of each hand-tightening screw 4 and located inside the positioning hollow ring 1 is fixed with a fastening head 5. The other end of each hand-tightening screw 4 and located outside the positioning hollow ring 1 is fixed with a support cylinder 6. By grasping the support cylinder 6 and rotating the hand-tightening screw 4, the two fastening heads 5 can be brought closer to each other, thereby facilitating the clamping of the pen-shaped ionization chamber probe located inside the positioning hollow ring 1.

[0032] Before and after the second measuring ruler 3 rotates, in order to facilitate the positioning and fixing of the second measuring ruler 3, a positioning post 7 is symmetrically fixed on the outer side of the positioning hollow ring 1 and at the upper end of the second measuring ruler 3. A guide groove 8 is symmetrically opened inside the second measuring ruler 3 and on the outer side of the positioning hollow ring 1. A limiting slide 10 is slidably connected to the inner side of both guide grooves 8. The support cylinder 6 and the positioning post 7 are slidably connected to the limiting slide 10.

[0033] To prevent the limiting slide 10 from disengaging from the guide groove 8, guide posts 9 are provided on the inner side of both guide grooves 8. The guide posts 9 are fixed to the second measuring ruler 3, and the limiting slide 10 is located outside the guide posts 9 and is slidably connected to the guide posts 9.

[0034] In order to facilitate the automatic reset of the limit slide 10 after each sliding limit slide 10 is released, a first spring 11 is sleeved on the outside of each guide post 9. One end of the two first springs 11 is fixed to the two limit slides 10 respectively, and the other end of the two first springs 11 is fixed to the second measuring ruler 3.

[0035] After clamping the pen-shaped ionization chamber probe, and when it is necessary to unfold the second measuring scale 3, first pull the two limiting slides 10 away from each other so that the two limiting slides 10 slide out from the outside of the two positioning posts 7, thereby facilitating the 90-degree rotation of the second measuring scale 3. After the second measuring scale 3 is unfolded 90 degrees, release the two limiting slides 10 and use the elasticity of the first spring 11 to drive the two limiting slides 10 to reset, so that the two limiting slides 10 slide into the outside of the two support cylinders 6 respectively, thereby limiting and fixing the position of the second measuring scale 3.

[0036] Example 2:

[0037] The pen-shaped ionization chamber probe positioning bracket provided in Example 1 has been further optimized, specifically, as follows: Figure 3-5As shown, in order to facilitate the placement of the positioning hollow ring 1, the first measuring ruler 2 and the second measuring ruler 3 on the circular opening of the examination bed, two bearing seats 14 are fixed at the bottom of the first measuring ruler 2 and on the outside of the positioning hollow ring 1. A support shaft 15 is fixed on the inner side of each bearing seat 14. A support leg 16 is rotatably connected to the outer side of the support shaft 15. A foot 22 is fixed at the end of the support leg 16 away from the support shaft 15, so that support can be easily achieved after the support leg 16 is unfolded.

[0038] When the support leg 16 is unfolded around the support shaft 15, in order to facilitate the positioning and fixing of the support leg 16, a support rod 17 is fixed on both sides of the end of each support leg 16 near the support shaft 15. A first spur gear 18 is fixed on the side of each support rod 17 away from the support leg 16. A gear groove 19 is opened inside both sides of each bearing seat 14. A second spur gear 20 is slidably connected inside the gear groove 19. The second spur gear 20 meshes with the first spur gear 18. A second spring 21 is also provided inside each gear groove 19. One end of the second spring 21 is fixed to the second spur gear 20, and the other end of the second spring 21 is fixed to the bearing seat 14.

[0039] Specifically, when the two support legs 16 are not unfolded, the second flat gear 20 is pressed down to slide into the inside of the gear groove 19, thereby disengaging the second flat gear 20 from the first flat gear 18, making it easier to flip and unfold the support leg 16 around the support shaft 15. When the two support legs 16 are unfolded and the teeth of the second flat gear 20 and the first flat gear 18 are aligned, the second flat gear 20 is released and the elasticity of the second spring 21 is used to drive the second flat gear 20 to reset, so that the second flat gear 20 re-engages with the first flat gear 18, thereby fixing the position of the support leg 16.

[0040] When the two supporting legs 16 are folded together and in an unfolded state, such as Figure 3 As shown, in order to further fix the two support legs 16, a mounting base 12 is symmetrically fixed on the outer side of the positioning hollow ring 1 and at the lower end of the first measuring ruler 2. Both mounting bases 12 are threaded with hand-tightening bolts 13. The support leg 22 is slidably connected to the hand-tightening bolt 13. That is, when the two support legs 16 are not unfolded, the hand-tightening bolt 13 passes through the support leg 22 and is threadedly connected to the mounting base 12 to fix the two support legs 16.

Claims

1. A positioning bracket for a pen-shaped ionization chamber probe, characterized in that, The system includes a positioning hollow ring (1), with a first measuring scale (2) fixed to the outer side of the positioning hollow ring (1). A second measuring scale (3) is rotatably connected to the outer side of the positioning hollow ring (1) and located at the upper end of the first measuring scale (2). Hand-tightening screws (4) are symmetrically threaded to the inner side of the positioning hollow ring (1) and located at the upper end of the second measuring scale (3). One end of each of the two hand-tightening screws (4) and located inside the positioning hollow ring (1) is fixed with a fastening head (5). A support cylinder (6) is fixed at the other end of the screw (4) and outside the positioning hollow ring (1). A positioning column (7) is also symmetrically fixed at the upper end of the second measuring scale (3) outside the positioning hollow ring (1). A guide groove (8) is symmetrically opened inside the second measuring scale (3) and outside the positioning hollow ring (1). A limit slide (10) is slidably connected to the inner side of the two guide grooves (8). The support cylinder (6) and the positioning column (7) are slidably connected to the limit slide (10).

2. The pencil-shaped ionization chamber probe positioning bracket according to claim 1, characterized in that, Guide posts (9) are provided on the inner side of both guide grooves (8). The guide posts (9) are fixed to the second measuring ruler (3). The limiting slide (10) is located outside the guide posts (9) and is slidably connected to the guide posts (9).

3. The pencil-shaped ionization chamber probe positioning bracket according to claim 2, characterized in that, Each of the guide posts (9) is fitted with a first spring (11) on its outer side. One end of each of the two first springs (11) is fixed to one of the two limiting slides (10), and the other end of each of the two first springs (11) is fixed to the second measuring ruler (3).

4. The pencil-shaped ionization chamber probe positioning bracket according to claim 1, characterized in that, Two bearing seats (14) are fixed at the bottom of the first measuring ruler (2) and outside the positioning hollow ring (1). Each bearing seat (14) has a support shaft (15) fixed inside. A support leg (16) is rotatably connected to the outside of the support shaft (15). A foot (22) is fixed at the end of the support leg (16) away from the support shaft (15).

5. The pencil-shaped ionization chamber probe positioning bracket according to claim 4, characterized in that, The positioning hollow ring (1) is symmetrically fixed with a mounting base (12) on the outside and at the lower end of the first measuring ruler (2). Both mounting bases (12) are threaded with hand-tightening bolts (13), and the support leg (22) is slidably connected to the hand-tightening bolt (13).

6. The pencil-shaped ionization chamber probe positioning bracket according to claim 4, characterized in that, Each of the support legs (16) has a support rod (17) fixed on both sides near the support shaft (15). Each of the support rods (17) has a first spur gear (18) fixed on the side away from the support leg (16). Each of the bearing seats (14) has a gear groove (19) inside both sides. A second spur gear (20) is slidably connected inside the gear groove (19). The second spur gear (20) meshes with the first spur gear (18). A second spring (21) is also provided inside each gear groove (19). One end of the second spring (21) is fixed to the second spur gear (20), and the other end of the second spring (21) is fixed to the bearing seat (14).

Images