CN110152209B

CN110152209B - Hand-held type radiotherapy setting-out device

Info

Publication number: CN110152209B
Application number: CN201910467176.0A
Authority: CN
Inventors: 于泽顺; 杨静; 兰卫光; 周毅娟; 葛红; 徐晓霞; 刘海龙; 严明珠; 白献红
Original assignee: Individual
Current assignee: Yu Zeshun
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2021-02-05
Anticipated expiration: 2039-05-31
Also published as: CN110152209A

Abstract

The invention relates to a handheld radiotherapy line drawing device, which effectively solves the problems of low precision of manual line drawing, large volume of line drawing equipment and high cost in the prior art; the technical scheme includes that the device comprises a double-layer shell, an annular cavity is formed between an inner layer and an outer layer, a through hole is formed in the axis of the shell, a plunger made of a magnetic material is installed at the lower portion of the through hole, an electromagnet is arranged above the plunger, a first pressure spring is installed between the electromagnet and the plunger, two cross grooves which are intersected in a cross shape are formed in the lower end face of the plunger, a sponge strip is installed in each cross groove, the plunger moves upwards to enable the cross grooves to be communicated with the cavity, a first fixing plate and a second fixing plate are arranged at the upper end opening of the through hole, a cross groove which is opposite to the two cross grooves is formed in the first fixing plate, and four laser type photoelectric switches which are opposite to four end points of the cross groove one by one and connected into a circuit of the electromagnet are evenly distributed on; the invention has the advantages of accurate positioning, small size, portability and low cost.

Description

Hand-held type radiotherapy setting-out device

Technical Field

The invention relates to the field of radiotherapy examination equipment, in particular to a handheld radiotherapy line drawing device.

Background

Radiotherapy, which is a physical therapy for tumors by irradiating cancerous regions with rays to kill cancer cells, can produce a good effect on many cancers; the radiation can damage normal cells and tissues while killing cancer cells, so that the radiation irradiation position needs to be positioned as accurately as possible before radiotherapy so as to ensure that the damage to the normal cells is reduced as much as possible while killing the cancer cells; at present, a canceration region is determined by a marking and positioning method, namely, a patient is checked on a pathological change region on an examination bed by an examination device, then a cross laser is projected on the skin of the patient by the positioning device, a medical worker carries out marking and marking by holding a marking pen with the hand according to the cross laser, and the canceration region is determined by geometric centers of a plurality of marks during subsequent radiotherapy.

When the marking pen is used for marking, the hands of medical staff and the marking pen can shield the cross laser, the skin of a patient can slide when the marking is carried out, errors are easy to generate, and in addition, the straightness of the marking is difficult to ensure by manual marking, so that the positioning accuracy is further influenced; although some marking devices exist at present, most of the marking devices perform marking through a computer-controlled mechanical arm, but the devices are large in size, high in cost and complex to operate, and the medical burden of patients is increased.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the handheld radiotherapy line drawing device, which effectively solves the problems of low precision of manual line drawing, large volume of line drawing equipment and high cost.

The technical scheme includes that the handheld radiotherapy line drawing device comprises a cylindrical shell, wherein the shell consists of an inner layer and an outer layer, an annular cavity is formed between the inner layer and the outer layer, a first through hole is formed in the axis of the shell, a plunger made of a magnetic material is installed at the lower part of the first through hole, the lower end of the plunger extends out of the first through hole, an electromagnet is arranged above the plunger, a pressure spring is installed between the electromagnet and the plunger, two cross grooves which are crossed in a cross mode are formed in the lower end face of the plunger, and a sponge strip is installed in each cross groove; a hollow cavity is formed in the plunger, the cavity is positioned above the transverse grooves, a plurality of second through holes are communicated between the two transverse grooves and the cavity, a vertical pipe communicated with the cavity is mounted on each of the left side and the right side of the plunger, and a plurality of third through holes are uniformly distributed on the periphery of the side wall of the upper end of the vertical pipe; the bottom of the shell is provided with two conical through holes with small ends facing downwards, the two conical through holes are respectively positioned right above the two vertical rods, the small ends of the conical through holes are the same as the outer diameters of the vertical rods, the upper end of each conical through hole is provided with a conical plug which is matched with the upper end of each conical through hole and can move up and down, a tension spring is connected between the upper end of each conical plug and the inner bottom surface of the shell, and the vertical rods can extend into the conical through holes along with the upward movement of the plungers and push the conical plugs to move up; the upper port of the first through hole is provided with a first fixing plate which is arranged at an upper and lower interval, a second fixing plate is arranged below the first fixing plate, the first fixing plate is provided with a cross groove which is opposite to the two transverse grooves from top to bottom, four laser type photoelectric switches are evenly distributed on the circumference of the second fixing plate, and the four laser type photoelectric switches are opposite to four end points of the cross groove one by one and connected into a circuit of the electromagnet in parallel.

The marking device has the advantages of accurate marking and positioning, small and portable equipment, low cost, convenient use and simple operation.

Drawings

Fig. 1 is a front cross-sectional view of an electromagnet of the present invention when not energized.

Fig. 2 is a front sectional view of the electromagnet of the present invention when energized.

Fig. 3 is a plan view at the first fixing plate.

Fig. 4 is a top cross-sectional view of the plunger in the cavity position.

Fig. 5 is a bottom view of the plunger.

Fig. 6 is an enlarged view of a portion a in fig. 1.

Fig. 7 is an enlarged view of a portion B in fig. 2.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.

As shown in fig. 1 to 7, the invention comprises a cylindrical shell 1, the shell 1 is composed of an inner layer and an outer layer, an annular cavity 2 is formed between the inner layer and the outer layer, a first through hole 3 is formed at the axis of the shell 1, a plunger 4 made of magnetic material is installed at the lower part of the first through hole 3, the lower end of the plunger 4 extends out of the first through hole 3, an electromagnet 5 is arranged above the plunger 4, a pressure spring 6 is installed between the electromagnet 5 and the plunger 4, two cross transverse grooves 7 are formed on the lower end surface of the plunger 4, and a sponge strip 8 is installed in each transverse groove 7; a hollow cavity 9 is formed in the plunger 4, the cavity 9 is positioned above the transverse grooves 7, a plurality of second through holes 10 are communicated between the two transverse grooves 7 and the cavity 9, a vertical pipe 11 communicated with the cavity 9 is mounted on each of the left side and the right side of the plunger 4, and a plurality of third through holes 12 are uniformly distributed on the periphery of the side wall of the upper end of the vertical pipe 11; the bottom of the shell 1 is provided with two conical through holes 13 with small ends facing downwards, the two conical through holes 13 are respectively positioned right above the two vertical rods, the small ends of the conical through holes 13 are the same as the outer diameters of the vertical rods, the upper end of each conical through hole 13 is provided with a conical plug 14 which is matched with the conical through hole and can move up and down, a tension spring 15 is connected between the upper end of each conical plug 14 and the inner bottom surface of the shell 1, and the vertical rods can move upwards along with the plunger 4 and extend into the conical through holes 13 and push the conical plugs 14 to move upwards; the upper port of the first through hole 3 is provided with a horizontal first fixing plate 16, a horizontal second fixing plate 17 is arranged below the first fixing plate 16, the first fixing plate 16 is provided with a cross groove 18 which is opposite to the two transverse grooves 7 up and down, four laser type photoelectric switches 19 are evenly distributed on the circumference of the second fixing plate 17, and the four laser type photoelectric switches 19 are opposite to four end points of the cross groove 18 one by one and connected in parallel in a circuit of the electromagnet 5.

A third fixing plate 20 is arranged above the plunger 4, the electromagnet 5 is fixed on the third fixing plate 20, a closed space can be formed between the plungers 4 by the third fixing plate 20, the closed space is communicated with the upper part of the cavity 2 through a vent pipe 21, and a first one-way valve 22 capable of introducing air into the cavity 2 is arranged at the top of the cavity 2; when the plunger 4 moves upwards, the air in the closed space can be pressed into the cavity 2, so that the cavity 2 has higher air pressure, and the liquid medicine in the cavity 2 can smoothly flow out.

In order to prevent the liquid medicine in the cavity 2 from flowing into the vent pipe 21 when the shell 1 is toppled, a partition plate 23 positioned below the upper end opening of the vent pipe 21 is arranged in the cavity 2, and a second one-way valve 24 capable of introducing air below the partition plate 23 is arranged on the partition plate 23.

In order to limit the sliding of the plunger 4, an annular limiting plate 25 is mounted at the lower port of the first through hole 3 through a screw, and a vertical limiting rod 26 is mounted at the upper end of the plunger 4; the stopper 25 prevents the plunger 4 from slipping out of the first through hole 3, and the stopper rod 26 prevents the plunger 4 from moving upward when contacting the electromagnet 5 or the third fixing plate 20.

In order to prevent the plunger 4 from rotating, a vertical guide pillar 27 is arranged at a non-circle center position of the upper end of the plunger 4, and the guide pillar 27 penetrates through the third fixing plate 20 and is in sealing fit with the third fixing plate 20.

And a sealing ring 28 is arranged at the matching part of the conical through hole 13 and the vertical pipe 11.

The lower end of the shell 1 is provided with an end cover 29.

The outer wall of the shell 1 is provided with a medicine feeding port 30 positioned below the partition plate 23, and a sealing plug 31 is arranged in the medicine feeding port 30.

And a circuit of the electromagnet 5 is provided with a master control switch.

According to the invention, liquid medicine is filled in the cavity 2, the four laser type photoelectric switches 19 are normally closed switches, when the device is in an initial rotating state, the master control switch is in a disconnected state, the electromagnet 5 is not electrified, at the moment, the plunger 4 is positioned below under the action of the pressure spring 6, the vertical pipe 11 does not extend into the conical through hole 13, and the conical plug 14 is tightly pressed with the conical through hole 13 under the action of the tension spring 15 to seal the conical through hole 13.

When in scribing, firstly, the end cover 29 is screwed off, then the master control switch is closed, the electromagnet 5 is electrified, the electromagnet 5 adsorbs the plunger 4 to move upwards under the action of the pressure spring 6 until the upper end of the limiting rod 26 is contacted with the electromagnet 5 or the third fixing plate 20, the plunger 4 moves upwards to press air between the plunger 4 and the third fixing plate 20 into the cavity 2 above the partition plate 23 through the air pipe 21, and then the air enters the lower part of the partition plate 23 through the second one-way valve 24 to increase the air pressure in the cavity 2; meanwhile, the plunger 4 moves upwards to enable the upper ends of the two vertical pipes 11 to extend into the two conical through holes 13 and push the conical plugs 14 to move upwards against the action of the tension springs 15, so that the conical through holes 13 are opened, liquid medicine in the cavity 2 flows into the vertical pipes 11 through the third through holes 12 under the action of air pressure, then enters the cavity 9, and then flows into the two transverse grooves 7 through the second through holes 10 to be absorbed by the sponge strips 8; the amount of air entering the cavity 2 is constant, and therefore the amount of medicine discharged per time is also constant.

After the closed master control switch plunger 4 moves upwards, medical staff holds the device to enable the bottom of the shell 1 to be attached to the skin of a patient, the position of the cross laser line is adjusted, the cross laser line is enabled to coincide with the cross groove 18 on the first fixing plate 16, after the cross laser line coincides with the cross groove, the four laser type photoelectric switches 19 can be irradiated by laser, the four laser type photoelectric switches 19 are all switched off after sensing the laser, at the moment, the circuit of the electromagnet 5 is switched off, the plunger 4 moves downwards under the action of the pressure spring 6, the vertical rod moves downwards to withdraw from the conical through hole 13, and the conical plug 14 moves downwards under the action of the tension spring 15 to close the conical through hole 13; the plunger 4 is popped downwards under the action of the pressure spring 6, so that two crossed sponge strips 8 can print a cross mark on the skin of the patient; because the four laser-type photoelectric switches 19 are connected in parallel to the circuit of the electromagnet 5, the electromagnet 5 can be powered off only when the four laser-type photoelectric switches are completely disconnected, namely the cross laser can be disconnected only when the cross laser is completely superposed with the cross groove 18 and the four laser-type photoelectric switches 19 are completely irradiated by the laser, the electromagnet 5 can be powered off, and the cross mark is superposed with the cross laser because the cross groove 18 is vertically opposite to the two sponge strips 8; after the plunger 4 moves downwards, negative pressure is generated between the plunger 4 and the third fixing plate 20 and in the cavity 2 above the partition plate 23, and outside air enters the cavity 2 above the partition plate 23 and the closed space between the plunger 4 and the third fixing plate 20 through the first check valve 22 until the air pressure is the same as the atmosphere.

After marking is finished, the device is moved away, the four laser type photoelectric switches 19 are not irradiated by laser, so that the four laser type photoelectric switches 19 are closed, the electromagnet 5 electrically adsorbs the plunger 4 to move upwards to the upper end of the limiting rod 26 to be contacted with the electromagnet 5 or the third fixing plate 20, the conical through hole 13 is opened again, meanwhile, the plunger 4 moves upwards to extrude air into the cavity 2, and the liquid medicine flows out again and is adsorbed by the sponge strip 8; and the positions are adjusted again to enable the cross groove 18 to be overlapped with the cross laser for marking, and the marking at all positions is finished repeatedly.

After the scribing is finished, the master control switch is closed, the electromagnet 5 is powered off, the plunger 4 moves downwards, the liquid outlet passage is cut off, and then the end cover 29 is screwed.

According to the invention, manual scribing is not needed, the laser type photoelectric switch 19 senses laser to control the plunger 4 to move downwards for automatic scribing, and scribing cannot be carried out when alignment is inaccurate, so that the automatic scribing device has an automatic error-proofing function, human errors caused by manual scribing and errors caused by shielding of cross laser by hands or a scribing pen are avoided, errors caused by skin slippage when the scribing pen is used for scribing are also avoided, and the marking is straight and regular compared with manual scribing, and the positioning is more accurate; meanwhile, the device is small and portable, does not occupy installation space, and is low in equipment cost, convenient to use and simple to operate.

Claims

1. A handheld radiotherapy line drawing device comprises a cylindrical shell (1), and is characterized in that the shell (1) consists of an inner layer and an outer layer, an annular cavity (2) is formed between the inner layer and the outer layer, liquid medicine is filled in the cavity 2, a first through hole (3) is formed in the axis of the shell (1), a plunger (4) made of a magnetic material is installed at the lower part of the first through hole (3), the lower end of the plunger (4) extends out of the first through hole (3), an electromagnet (5) is arranged above the plunger (4), a pressure spring (6) is installed between the plunger and the electromagnet, two cross grooves (7) are formed in the lower end face of the plunger (4), and a sponge strip (8) is installed in each cross groove (7); a hollow cavity (9) is formed in the plunger (4), the cavity (9) is located above the transverse grooves (7), a plurality of second through holes (10) are communicated between the two transverse grooves (7) and the cavity (9), a vertical pipe (11) communicated with the cavity (9) is mounted on each of the left side and the right side of the plunger (4), and a plurality of third through holes (12) are uniformly distributed on the periphery of the side wall of the upper end of the vertical pipe (11); the bottom of the shell (1) is provided with two conical through holes (13) with downward small ends, the two conical through holes (13) are respectively positioned right above the two vertical rods, the small ends of the conical through holes (13) are the same as the outer diameters of the vertical rods, the upper end of each conical through hole (13) is provided with a conical plug (14) which is matched with the conical through hole and can move up and down, a tension spring (15) is connected between the upper end of each conical plug (14) and the inner bottom surface of the shell (1), and the vertical rods can move up along with the plunger (4) and can extend into the conical through holes (13) and push the conical plugs (14) to move up; a horizontal first fixing plate (16) is arranged at the upper port of the first through hole (3), a horizontal second fixing plate (17) is arranged below the first fixing plate (16), a cross groove (18) which is vertically opposite to the two cross grooves (7) is formed in the first fixing plate (16), four laser type photoelectric switches (19) are uniformly distributed on the circumference of the second fixing plate (17), the four laser type photoelectric switches (19) are normally closed switches, and the four laser type photoelectric switches (19) are opposite to four end points of the cross groove (18) one by one and are connected into a circuit of the electromagnet (5);

the top of plunger (4) install a third fixed plate (20), electro-magnet (5) are fixed on third fixed plate (20), but third fixed plate (20) form airtight space between plunger (4), and this airtight space is through breather pipe (21) and cavity (2) upper portion intercommunication, cavity (2) top is installed and is had first check valve (22) that can admit air in to cavity (2).

2. A hand-held radiotherapeutic marking apparatus as claimed in claim 1, wherein the chamber (2) has a partition (23) mounted therein below the upper end opening of the vent tube (21), the partition (23) having a second one-way valve (24) mounted therein for admitting air below the partition (23).

3. A hand-held radiotherapy line drawing device according to claim 1, wherein the lower port of the first through hole (3) is provided with an annular limiting plate (25) through a screw, and the upper end of the plunger (4) is provided with a vertical limiting rod (26).

4. A hand-held apparatus for marking lines for radiotherapy as claimed in claim 1, wherein the plunger (4) is provided with a vertical guide post (27) at a non-centre position at the upper end thereof, the guide post (27) passing through the third fixing plate (20) and being in sealing engagement with the third fixing plate (20).

5. A hand-held radiotherapeutic marking apparatus as claimed in claim 1, wherein a sealing ring (28) is mounted at the fitting of the conical through hole (13) and the standpipe (11).

6. A hand-held radiotherapeutic marking apparatus as claimed in claim 1, wherein the housing 1) is provided at its lower end with an end cap (29).

7. A hand-held radiotherapy line drawing device according to claim 1, wherein a medicine feeding port (30) is formed in the outer wall of the casing (1) and located below the partition plate (23), and a sealing plug (31) is arranged in the medicine feeding port (30).

8. A hand-held radiotherapy line drawing device according to claim 1, wherein a circuit of the electromagnet (5) is provided with a master control switch.