Ionization chamber installation device

By designing an ionization chamber installation device, the problem of disassembling the treatment head for ionization chamber maintenance is solved, convenient maintenance and precise positioning of the ionization chamber are achieved, and maintenance costs and time are reduced.

CN223311542UActive Publication Date: 2025-09-09SPARTICLE HEALTHCARE CO LTD
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Patent Information

Application Number
CN202422101862.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-28
Publication Date
2025-09-09
Estimated Expiration
2034-08-28

AI Technical Summary

Technical Problem

Repairing the ionization chamber in existing medical linear accelerators requires disassembling the entire treatment head, which increases repair time and cost, and the position of the ionization chamber is difficult to accurately locate.

Method used

An ionization chamber installation device is designed, which includes an ionization chamber push-pull slide, an ionization chamber mounting plate, a mounting plate pressure block, an ionization chamber positioning piece and a positioning pin. The positioning and sliding of the ionization chamber are achieved through a mechanical structure, which facilitates the extraction and replacement of the ionization chamber from the treatment head and ensures accurate positioning.

Benefits of technology

The ionization chamber can be conveniently repaired and replaced, which reduces the repair time and cost. At the same time, the accurate positioning of the ionization chamber is ensured, and the use of complex electrical components is avoided.

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Abstract

The utility model provides an ionization chamber mounting device. The ionization chamber mounting device comprises an ionization chamber push-pull sliding seat, an ionization chamber mounting plate, a mounting plate pressing block, an ionization chamber positioning piece and a positioning pin, sliding rails are arranged on the two sides of the top of the ionization chamber push-pull sliding base. The ionization chamber mounting plate is arranged on a sliding rail of the ionization chamber push-pull sliding seat in a sliding manner; a bayonet is formed in the rear end of the ionization chamber mounting plate; the ionization chamber positioning pieces are arranged on the two sides of the top of the ionization chamber mounting plate and abut against the two side edges of the ionization chamber respectively; the mounting plate pressing block is arranged at the front end of the ionization chamber push-pull sliding seat and is used for abutting against the front end of the ionization chamber mounting plate; and the positioning pin is arranged at the rear end of the top of the ionization chamber push-pull sliding seat and is used for abutting against a bayonet of an ionization chamber mounting plate. The ionization chamber can be drawn out from the treatment head, maintenance and replacement are facilitated, and meanwhile, a positioning function is achieved, so that the position of the ionization chamber after each time of installation is basically unchanged, and correction of the position of the ionization chamber is reduced or not needed.
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Description

Technical Field

[0001] The present application relates to the field of radiotherapy equipment, and in particular to an ionization chamber installation device for a medical linear accelerator. Background Art

[0002] A medical linear accelerator (LINAC) is a device that uses radiation to treat tumors. The ionization chamber is typically located within the treatment head of a LINAC, between the primary collimator and the aperture. Its primary function is to monitor the radiation dose and ensure that the radiation reaches the tumor area at the desired dose.

[0003] The ionization chamber operates by providing feedback on radiation intensity through the current generated by the ionizing effect of radiation on the internal medium. Consequently, the ionization chamber is exposed to radiation for extended periods, resulting in a limited operating lifespan and requiring frequent repair or replacement. Furthermore, since the ionization chamber is located within the treatment head, repairs require disassembly of the entire treatment head, increasing both time and cost. Utility Model Content

[0004] In view of this, the present invention provides an ionization chamber installation device, which allows the ionization chamber to be pulled out from the treatment head for easy maintenance and replacement. It also has a positioning function, so that the position of the ionization chamber remains basically unchanged after each installation, reducing or eliminating the need for correction of the position of the ionization chamber.

[0005] The technical solution of the present utility model is specifically achieved as follows:

[0006] An ionization chamber installation device, comprising: an ionization chamber push-pull slide, an ionization chamber mounting plate, a mounting plate pressing block, an ionization chamber positioning member, and a positioning pin;

[0007] Slide rails are provided on both sides of the top of the ionization chamber push-pull slide;

[0008] The ionization chamber mounting plate is slidably arranged on the slide rail of the ionization chamber push-pull slide; the ionization chamber mounting plate is provided with a mounting hole for mounting the ionization chamber; the rear end of the ionization chamber mounting plate is provided with a bayonet;

[0009] The ionization chamber positioning members are arranged on both sides of the top of the ionization chamber mounting plate and respectively abut against the two side edges of the ionization chamber;

[0010] The mounting plate pressing block is arranged at the front end of the ionization chamber push-pull slide and is used to abut against the front end of the ionization chamber mounting plate;

[0011] The positioning pin is arranged at the top rear end of the ionization chamber push-pull slide and is used for abutting against the bayonet of the ionization chamber mounting plate.

[0012] Preferably, the ionization chamber positioning member includes: a positioning block and a positioning block mounting screw;

[0013] The positioning block is fixed to the top of the ionization chamber mounting plate by the positioning block mounting screws.

[0014] Preferably, the mounting plate pressing block is installed and fixed to the front end of the ionization chamber push-pull slide by means of a screw that does not come out.

[0015] Preferably, the end of the ionization chamber mounting plate that contacts the mounting plate pressing block is provided with a first inclined surface;

[0016] A second inclined surface is provided on the side of the mounting plate pressing block that contacts the ionization chamber mounting plate;

[0017] The first inclined surface and the second inclined surface have different inclination angles.

[0018] Preferably, the ionization chamber mounting device further comprises: a handle;

[0019] The handle is arranged at the front end of the ionization chamber mounting plate.

[0020] Preferably, the handle is fixed to the front end of the ionization chamber mounting plate by a handle mounting screw.

[0021] Preferably, a third inclined surface is provided on the side of the bayonet on the ionization chamber mounting plate that contacts the positioning pin;

[0022] A fourth inclined surface is provided on the side of the positioning pin that contacts the bayonet;

[0023] The third inclined surface and the fourth inclined surface have different inclination angles.

[0024] Preferably, the wide width of the opening of the bayonet is greater than the width of the bottom of the bayonet.

[0025] Preferably, the rear end of the ionization chamber mounting plate is provided with two bayonet holes;

[0026] The top rear end of the ionization chamber push-pull slide is provided with two positioning pins corresponding to the two bayonet holes respectively.

[0027] As can be seen above, in the ionization chamber mounting device of the present invention, since the ionization chamber positioning member and positioning pin are provided therein, the ionization chamber can be positioned on the ionization chamber mounting plate and the ionization chamber push-pull slide by the ionization chamber positioning member and positioning pin. In addition, since the ionization chamber mounting plate can slide on and be withdrawn from the slide rails of the ionization chamber push-pull slide, the ionization chamber mounted on the ionization chamber mounting plate can be conveniently withdrawn from the treatment head for maintenance and / or replacement. This allows the ionization chamber to be repaired and / or replaced without disassembling the entire treatment head. The ionization chamber can also be precisely positioned, ensuring that the position of the ionization chamber remains essentially unchanged after each installation, reducing or eliminating the need for positional correction of the ionization chamber, thereby effectively saving time and maintenance costs. Furthermore, since the overall structure of the ionization chamber mounting device does not include any other electrical components, the above-mentioned functions can be achieved solely by mechanical structure, thereby also saving corresponding design costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the ionization chamber installation device in a specific embodiment of the utility model.

[0029] Figure 2 It is a top view of the ionization chamber installation device in a specific embodiment of the present utility model.

[0030] Figure 3 It is an AA cross-sectional view of the ionization chamber installation device in a specific embodiment of the present utility model.

[0031] Figure 4 It is a partial view of the positioning pin in a specific embodiment of the present utility model.

[0032] Figure 5 It is a top view of the ionization chamber mounting plate in a specific embodiment of the present utility model. DETAILED DESCRIPTION

[0033] In order to make the technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Figure 1 This is a structural diagram of an ionization chamber installation device in a specific embodiment of the present invention. Figure 2 This is a top view of the ionization chamber installation device in a specific embodiment of the present invention. Figure 3 AA sectional view of the ionization chamber installation device in a specific embodiment of the present invention. Figures 1 to 3 As shown, the ionization chamber installation device in the present application includes: an ionization chamber push-pull slide 11, an ionization chamber mounting plate 12, a mounting plate pressing block 13, an ionization chamber positioning member 14 and a positioning pin 15;

[0035] Slide rails 101 are provided on both sides of the top of the ionization chamber push-pull slide 11;

[0036] The ionization chamber mounting plate 12 is slidably mounted on the slide rail 101 of the ionization chamber push-pull slide 11; the ionization chamber mounting plate 12 is provided with a mounting hole 21 for mounting the ionization chamber 10; a bayonet 22 is provided at the rear end of the ionization chamber mounting plate 12;

[0037] The ionization chamber positioning members 14 are arranged on both sides of the top of the ionization chamber mounting plate 12 and respectively abut against the two side edges of the ionization chamber 10;

[0038] The mounting plate pressing block 13 is provided at the front end of the ionization chamber push-pull slide 11 and is used to abut against the front end of the ionization chamber mounting plate 12;

[0039] The positioning pin 15 is provided at the top rear end of the ionization chamber push-pull slide 11 and is used to abut against the bayonet 22 of the ionization chamber mounting plate 12 .

[0040] When using the above-mentioned ionization chamber mounting device of the present application, the bottom of the ionization chamber push-pull slide 11 can be first fixed to the treatment head (not shown in the figure), and then the ionization chamber mounting plate 12 can be slid and set on the slide rail 101 of the ionization chamber push-pull slide 11, so that the ionization chamber mounting plate 12 can slide freely on the slide rail 101; then, the ionization chamber 10 can be installed on the ionization chamber mounting plate 12 through the mounting screws 23 and the mounting holes 21 on the ionization chamber mounting plate 12. When the ionization chamber 10 is first installed, the ionization chamber 10 can be first installed and fixed on the ionization chamber mounting plate 12, and then the corresponding ionization chamber positioning members 14 can be respectively set and fixed on both sides of the top of the ionization chamber mounting plate 12, so that the ionization chamber positioning members 14 are closely attached to the two side edges of the ionization chamber 10. After installing the ionization chamber positioning member 14, each time the ionization chamber 10 is disassembled, if the ionization chamber 10 needs to be reinstalled, the two side edges of the ionization chamber 10 can be placed tightly against the ionization chamber positioning member 14 before the ionization chamber 10 is fixed and installed, thereby ensuring the consistency of the position of the ionization chamber 10 after each installation. In addition, the ionization chamber mounting plate 12 can be pushed and slid on the slide rail 101 until the retaining hole 22 at the rear end of the ionization chamber mounting plate 12 abuts against the positioning pin 15 (the positioning pin 15 can provide a positioning function for the ionization chamber mounting plate 12); then, the mounting plate pressing block 13 can be installed and fixed to the front end of the ionization chamber push-pull slide 11, abutting against the front end of the ionization chamber mounting plate 12, pressing the ionization chamber mounting plate 12 tightly, ensuring that the retaining hole 22 of the ionization chamber mounting plate 12 is tightly against the positioning pin 15, and completing the positioning between the ionization chamber mounting plate 12 and the ionization chamber push-pull slide 11.

[0041] In addition, as an example, Figure 1As shown, in a specific embodiment of the present application, the ionization chamber positioning member 14 may include: a positioning block 141 and a positioning block mounting screw 142;

[0042] The positioning block 141 is fixed to the top of the ionization chamber mounting plate 12 by the positioning block mounting screws 142 .

[0043] In addition, as an example, Figure 1 and Figure 3 As shown, in a specific embodiment of the present application, the mounting plate pressing block 13 can be installed and fixed to the front end of the ionization chamber push-pull slide 11 by a screw 31 that does not come out.

[0044] The above-mentioned non-slip screw 31 can prevent the non-slip screw 31 from falling from the mounting plate pressing block 13 when the mounting plate pressing block 13 is removed, thereby greatly reducing the risk of the screw falling into the interior of the treatment head during removal.

[0045] In addition, as an example, Figure 3 As shown, in a specific embodiment of the present application, a first inclined surface is provided at one end of the ionization chamber mounting plate 12 that contacts the mounting plate pressing block 13, and a second inclined surface is provided at one side of the mounting plate pressing block 13 that contacts the ionization chamber mounting plate 12; the inclination angles of the first inclined surface and the second inclined surface are different.

[0046] Therefore, when the non-slipping screw 31 is gradually tightened, the second inclined surface of the mounting plate pressing block 13 will push the first inclined surface of the ionization chamber mounting plate 12, so that the ionization chamber mounting plate 12 moves toward its rear end and toward the top of the ionization chamber push-pull slide 11; when the non-slipping screw 31 is locked, the ionization chamber mounting plate 12 will be positioned in the height direction and the front-back direction.

[0047] In addition, as an example, Figure 1 and Figure 3 As shown, in a specific embodiment of the present application, the ionization chamber installation device may further include: a handle 16;

[0048] The handle 16 is disposed at the front end of the ionization chamber mounting plate 12 .

[0049] By providing the handle 16 , the ionization chamber mounting plate 12 can be easily pushed and pulled, so that the ionization chamber mounting plate 12 slides on the slide rail 101 of the ionization chamber push-pull slide 11 .

[0050] In addition, as an example, Figure 3 As shown, in a specific embodiment of the present application, the handle 16 can be fixed to the front end of the ionization chamber mounting plate 12 by a handle mounting screw 61 .

[0051] In addition, as an example, Figure 4 As shown, in a specific embodiment of the present application, a third inclined surface 41 is provided on the side where the bayonet 22 on the ionization chamber mounting plate 12 contacts the positioning pin 15, and a fourth inclined surface 42 is provided on the side where the positioning pin 15 contacts the bayonet 22; the inclination angles of the third inclined surface 41 and the fourth inclined surface 42 are different.

[0052] In addition, as an example, Figure 5 As shown, in a specific embodiment of the present application, the wide width of the opening of the bayonet 22 is greater than the width of the bottom of the bayonet 22 .

[0053] Therefore, as the screw 31 is gradually tightened without dislodging, the positioning pin 15 first contacts the wide section at the opening of the retaining hole 22 of the ionization chamber mounting plate 12 and gradually slides to the narrow section at the bottom of the retaining hole 22. The narrow section and the positioning pin 15 have a high degree of fit precision, enabling precise positioning. Furthermore, because the third and fourth inclined surfaces have different inclination angles, they are ensured to be in close contact when the ionization chamber mounting plate 12 is positioned. This close contact between the two inclined surfaces generates an upward force on the ionization chamber mounting plate 12, thereby exerting an upward force on each of the front and rear sides of the ionization chamber mounting plate 12, thereby achieving vertical positioning of the ionization chamber mounting plate 12.

[0054] In addition, as an example, in a specific embodiment of the present application, the rear end of the ionization chamber mounting plate 12 is provided with two bayonet holes 22; the top rear end of the ionization chamber push-pull slide 11 is provided with two positioning pins 15 corresponding to the two bayonet holes 22 respectively.

[0055] In summary, in the technical solution of the present application, since the ionization chamber positioning member and positioning pin are provided in the above-mentioned ionization chamber installation device, the ionization chamber can be positioned on the ionization chamber mounting plate and the ionization chamber push-pull slide by the ionization chamber positioning member and positioning pin. In addition, since the ionization chamber mounting plate can slide on the slide rails of the ionization chamber push-pull slide and can also be withdrawn from the slide rails, the ionization chamber installed on the ionization chamber mounting plate can be easily withdrawn from the treatment head for easy maintenance and / or replacement. Therefore, the ionization chamber can be repaired and / or replaced without disassembling the entire treatment head. In addition, the ionization chamber can be accurately positioned so that the position of the ionization chamber remains essentially unchanged after each installation, reducing or eliminating the need for position correction of the ionization chamber, thereby effectively saving time and maintenance costs. At the same time, since the overall structure of the above-mentioned ionization chamber installation device does not contain other electrical components, the above-mentioned functions can be achieved solely by mechanical structure, thereby also saving corresponding design costs.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ionization chamber installation device, characterized in that: The ionization chamber installation device includes: an ionization chamber push-pull slide, an ionization chamber installation plate, a installation plate pressing block, an ionization chamber positioning piece and a positioning pin; Slide rails are provided on both sides of the top of the ionization chamber push-pull slide; The ionization chamber mounting plate is slidably arranged on the slide rail of the ionization chamber push-pull slide; the ionization chamber mounting plate is provided with a mounting hole for mounting the ionization chamber; the rear end of the ionization chamber mounting plate is provided with a bayonet; The ionization chamber positioning members are arranged on both sides of the top of the ionization chamber mounting plate and respectively abut against the two side edges of the ionization chamber; The mounting plate pressing block is arranged at the front end of the ionization chamber push-pull slide and is used to abut against the front end of the ionization chamber mounting plate; The positioning pin is arranged at the top rear end of the ionization chamber push-pull slide and is used for abutting against the bayonet of the ionization chamber mounting plate.

2. The ionization chamber installation device according to claim 1, characterized in that: The ionization chamber positioning member includes: a positioning block and a positioning block mounting screw; The positioning block is fixed to the top of the ionization chamber mounting plate by the positioning block mounting screws.

3. The ionization chamber installation device according to claim 1, characterized in that: The mounting plate pressing block is mounted and fixed to the front end of the ionization chamber push-pull slide seat by means of a screw that does not come out.

4. The ionization chamber installation device according to claim 3, characterized in that: One end of the ionization chamber mounting plate that contacts the mounting plate pressing block is provided with a first inclined surface; A second inclined surface is provided on the side of the mounting plate pressing block that contacts the ionization chamber mounting plate; The first inclined surface and the second inclined surface have different inclination angles.

5. The ionization chamber installation device according to claim 1, characterized in that: The ionization chamber installation device further includes: a handle; The handle is arranged at the front end of the ionization chamber mounting plate.

6. The ionization chamber installation device according to claim 5, characterized in that: The handle is fixed to the front end of the ionization chamber mounting plate through a handle mounting screw.

7. The ionization chamber installation device according to claim 1, characterized in that: A third inclined surface is provided on the side of the bayonet on the ionization chamber mounting plate that contacts the positioning pin; A fourth inclined surface is provided on the side of the positioning pin that contacts the bayonet; The third inclined surface and the fourth inclined surface have different inclination angles.

8. The ionization chamber installation device according to claim 1, characterized in that: The wide width of the opening of the bayonet is greater than the width of the bottom of the bayonet.

9. The ionization chamber installation device according to claim 1, characterized in that: The rear end of the ionization chamber mounting plate is provided with two bayonet holes; The top rear end of the ionization chamber push-pull slide is provided with two positioning pins corresponding to the two bayonet holes respectively.