CN113598932A - Constant-force handheld device for medical scene - Google Patents
Constant-force handheld device for medical scene Download PDFInfo
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- CN113598932A CN113598932A CN202110990777.7A CN202110990777A CN113598932A CN 113598932 A CN113598932 A CN 113598932A CN 202110990777 A CN202110990777 A CN 202110990777A CN 113598932 A CN113598932 A CN 113598932A
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- constant
- sliding
- force
- base frame
- handheld
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1402—Probes for open surgery
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0538—Measuring electrical impedance or conductance of a portion of the body invasively, e.g. using a catheter
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/064—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension
- A61B2090/065—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension for measuring contact or contact pressure
Abstract
The application discloses constant-force handheld equipment for a medical scene, which relates to the technical field of medical equipment and comprises a handheld base frame, a sliding part, a constant-force elastic part and an electrode part; the sliding piece is arranged on the handheld base frame and is in sliding fit with the handheld base frame along a linear direction; the electrode piece is connected with the sliding piece along a linear direction; the constant-force elastic piece is detachably connected between the handheld base frame and the sliding piece and is used for providing constant pressure of the sliding piece within a preset sliding displacement amount; when the sliding part is in an initial state, the sliding part is contacted and propped against the handheld base frame under the pressure action of the constant-force elastic part. The structural design has the advantages of low cost, high reliability, high response speed, one-time use, good portability, safety, no radiation, certain compliance and capability of tracking and compensating the tissue motion.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to constant-force handheld equipment for medical scenes.
Background
During the operation, the pressing force of the medical instrument on the patient affects the operation quality to a certain extent.
1. In the radio frequency ablation, the ablation needle is used for puncturing the inside of a tumor, so that the temperature of tumor cells is increased, the tumor cells are deformed and subjected to coagulation necrosis, and the purpose of killing the tumor cells is achieved. In the operation of using radiofrequency ablation to treat idiopathic right ventricular outflow tract ventricular arrhythmia (RVOT-VAs), if the contact force between the catheter tip and myocardial tissue is too low, a continuous transmural myocardial tissue injury cannot be formed, thereby affecting the immediate success rate and the long-term recurrence rate of the operation. However, if the contact force is too high, serious complications such as cardiac perforation, cardiac tamponade, local eschar formation, and thromboembolism may increase. In general, the contact force between the tip of the catheter and the tissue cannot be directly measured, and even an experienced physician cannot accurately sense the pressure of the catheter in contact with the tissue in the body by manipulating the finger touch of the catheter, but has to rely on an indirect method to evaluate the contact force between the tip of the catheter and the tissue, such as using a pressure sensing catheter, monitoring the contact force between the tip of the catheter and the tissue in real time, and monitoring the motion and shape, impedance, change of potential amplitude, ultrasonic positioning and the like of the catheter under X-ray fluoroscopy. However, these methods only produce an effect of monitoring the pressure, and the control of the force also requires the doctor himself to change the hand strength through the monitoring result, and the operation quality is influenced by the experience of the doctor.
2. Pressure also has a significant impact on the measurement of bioelectrical impedance (EBI), a measurement technique that reflects the electrical characteristics of a tissue region and has been shown to be useful in identifying different tissue types and even different levels of pathology. This technique is used to distinguish between different types of tissue by injecting an excitation electrical signal into the target tissue and measuring the electrical signal returned from the area and analyzing the measured signal. Because the water and mineral content, cell membrane permeability, and cell packing density and direction in tumor cells are often greatly different from those of healthy tissues, the electrical characteristics of the tumor cells are obviously different from those of the healthy tissues, and therefore, the tissue types can be identified by measuring the calculated electrical impedance characteristics. EBI sensing technology has been applied to the detection of various cancers. EBI has the advantages of being non-invasive, low cost, portable, and user friendly compared to CT, MRI, etc., which have led to its rapid development. EBI measurement method as a contact measurement method, force regulation plays an important role in this process. On one hand, the existing bioelectrical impedance equipment is greatly influenced by surface body fluid, and the EBI sensing technology is sensitive to shallow tissues, so that signals can be polluted by the body fluid on the top of the tissues, and the accuracy of identification results is influenced. On the other hand, researches show that positive correlation exists between the EBI measurement result and the pressure applied by the probe, and the difference of the pressure can cause the deviation of the bioelectrical impedance measurement result, thereby influencing the accuracy of the final result.
3. The invention is particularly important for controlling the force of fragile tissues such as brain and blood vessels, and can protect the fragile tissues from being subjected to excessive pressure in the operation process so as to avoid damage.
From point 1/2/3, it can be seen that the pressure affects the success rate and complications during the rf ablation, the bioelectrical impedance measurement result is also affected by the pressure, and different pressures affect the contact condition between the probe and the tissue, and affect the measurement data, thereby generating an erroneous prediction of the diseased tissue. Therefore, the interactive constant force is greatly required in the operation process. However, the existing pressure catheter, X-ray fluoroscopy device and ultrasonic positioning device can only indirectly monitor the magnitude of interaction force, force control still needs a doctor to change the magnitude of hand strength through a monitoring result, reliability is low, cost is high, and radiation condition exists. In addition, although the conventional force controller device can realize certain interactive constant force control, the conventional force controller device has the defects of high cost, low compensation response speed when the tissue generates displacement, difficulty in sterilization and large volume, and thus has poor portability.
Disclosure of Invention
In view of this, the present application aims to provide a constant-force handheld device for medical scenes, which has the advantages of good reliability, low cost, fast compensation response speed when the tissue generates displacement, convenient sterilization, good portability, safety and no radiation.
In order to achieve the technical purpose, the application provides a constant-force handheld device for a medical scene, which comprises a handheld base frame, a sliding part, a constant-force elastic part and an electrode part;
the sliding piece is arranged on the handheld base frame and is in sliding fit with the handheld base frame along a linear direction;
the electrode element is connected to the sliding element along the straight line direction;
the constant-force elastic piece is detachably connected between the handheld base frame and the sliding piece and is used for providing constant pressure of the sliding piece within a preset sliding displacement amount;
when the sliding part is in an initial state, the sliding part is contacted and propped against the handheld base frame under the pressure action of the constant-force elastic part.
Further, the handheld base frame is provided with a first stopping part for abutting against the sliding part in a contact manner in an initial state;
the handheld base frame is further provided with a second stopping part, and a limiting sliding area for the sliding part to slide is formed between the second stopping part and the first stopping part.
Further, the handheld base frame comprises a U-shaped frame and a cover plate;
the frame comprises a bottom frame and two side frames;
the two side frames are vertically connected to the two ends of the top of the bottom frame;
the cover plate is arranged at the tops of the two side frames;
the sliding piece comprises an inverted U-shaped sliding block and a hollow pipe;
the sliding block comprises a top plate and two side plates;
the two side plates are vertically connected to the two side edges of the bottom of the top plate;
the sliding block is slidably arranged between the two side frames, and a U-shaped groove of the sliding block can be used for the bottom frame to movably extend into;
the cover plate forms the first stopping part and is used for abutting against the top of the top plate in a contact manner in an initial state;
the bottom frame forms a second stopping part which can be contacted and abutted with the bottom of the top plate;
the hollow pipe is vertically connected with the hollow pipe and movably penetrates through the cover plate;
the electrode piece is arranged at one end of the hollow pipe far away from the top plate;
the through cavity of the hollow pipe penetrates through the top plate to form a wiring channel for the lead of the electrode piece to pass through;
and the bottom frame is provided with a communicating hole corresponding to the through cavity.
Furthermore, the inner side walls of the two side frames are respectively provided with a sliding chute;
each sliding groove respectively upwards penetrates out of the top of the corresponding side frame;
and guide bulges which extend into the sliding grooves and are in sliding fit with the sliding grooves are respectively arranged on two end faces of the top plate.
Further, the constant force elastic member is specifically a nonlinear constant force spring.
Further, the number of the constant-force elastic pieces is two;
the two constant-force elastic pieces are correspondingly arranged on the outer side surfaces of the two side plates one by one and are distributed in a cross way in a different surface way;
one ends of the two constant-force elastic pieces are fixedly connected to the side frames in a one-to-one correspondence manner;
the other ends of the two constant-force elastic pieces are rotatably connected to the side plates in a one-to-one correspondence manner.
Furthermore, one side end face of each of the two side frames is provided with an extending part;
the two extending parts are rotationally symmetrical relative to the vertical central line of the bottom frame;
the inner wall surface of each extension part is provided with a clamping groove;
the clamping groove is provided with an opening which upwards penetrates out of the top of the side frame and is used for clamping one end of the corresponding constant-force elastic piece;
the bottom of the cover plate seals the opening of the clamping groove.
Furthermore, the clamping groove is a T-shaped groove;
one end of the constant-force elastic piece is provided with a first connecting part matched with the T-shaped groove;
the first connecting part is a T-shaped clamping block.
Further, the other end of the constant force spring is provided with a second connecting part;
and a third connecting part which is rotatably matched with the second connecting part is arranged on the outer side surface of the side plate.
Further, the third connecting part is a connecting column;
the second connecting part is a connecting sleeve, and the third connecting part is rotatably sleeved with the second connecting part.
According to the technical scheme, the sliding piece capable of sliding along the linear direction is arranged on the handheld base frame, the constant-force elastic piece with the pretightening force is arranged between the sliding piece and the handheld base frame, and the constant-force elastic piece is used for providing constant pressure of the sliding piece in the preset sliding displacement amount. By the structural design, in the application of the ablation, the contact force between the catheter and the tissue in the ablation can be well controlled, and in the EBI measurement, the contact force between the electrode probe and the tissue can be well controlled, so that the operation quality is improved; the pressure control device can be well used in operations needing to control the pressure on the fragile tissues such as the brain, the blood vessels and the like, and can not cause unnecessary damage to the tissues; the tissue displacement caused by liver pulsation or respiration and the like in the operation can be quickly compensated, and the constant force is kept; the method has the advantages of good reliability and high compensation response speed when the tissue generates displacement. Moreover, the structural design of the application also has the advantages of simple structure, low cost, disposability, good portability, convenient sterilization, safety and no radiation. Moreover, the constant force elastic part is detachably arranged, so that different constant force elastic parts can be conveniently replaced to adjust the constant force.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a front view of a constant force handpiece for use in a medical setting provided herein;
FIG. 2 is an exploded schematic view of a constant force handpiece for use in a medical setting provided herein;
FIG. 3 is a schematic diagram of a frame structure of a constant force handheld device for use in a medical scenario provided herein;
FIG. 4 is a schematic diagram of a slider structure of a constant force handpiece for use in medical settings as provided herein;
FIG. 5 is a schematic diagram of a constant force spring of a constant force handheld device for use in a medical setting provided herein;
FIG. 6 is a schematic representation of a simulation of a constant force spring of a constant force handpiece for use in medical settings as provided herein;
FIG. 7 is a graph of the resultant force displacement characteristic of a constant force spring for a constant force handpiece for use in a medical setting as provided herein;
in the figure: 100. a handheld base frame; 200. a slider; 300. a constant force elastic member; 301. an inclined section; 302. an arc-shaped section; 400. an electrode member; 1. a frame; 11. a bottom frame; 111. a communicating hole; 12. a side frame; 121. a chute; 122. anti-skid lines; 13. an extension portion; 131. a card slot; 2. a cover plate; 21. loading the bump; 3. a slider; 31. a top plate; 311. a guide projection; 32. a side plate; 321. a third connecting portion; 4. a hollow tube; 41. a cavity is communicated; 51. a first connection portion; 52. a second connecting portion.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
The embodiment of the application discloses a constant-force handheld device for a medical scene.
Referring to fig. 1 and fig. 2, an embodiment of a constant-force handheld device for use in a medical scenario provided in an embodiment of the present application includes:
a hand-held base frame 100, a slider 200, a constant force elastic member 300, and an electrode member 400.
The slider 200 is mounted on the handheld base frame 100 and slidably engaged with the handheld base frame 100 in a linear direction, and the electrode member 400 is connected to the slider 200 in a linear direction.
The constant force elastic member 300 is detachably connected between the handheld base frame 100 and the sliding member 200, and is used for providing a constant pressure to the sliding member 200 within a preset sliding displacement amount. That is, the sliding element 200 slides within a predetermined sliding displacement amount, and the constant-force elastic element 300 can provide a constant-force pressure to the sliding element 200, so as to ensure that the electrode element 400 can maintain a constant force when contacting with the tissue. Moreover, when the sliding member 200 is in the initial state, the constant force elastic member 300 is pressed against the handheld base frame 100, that is, the constant force elastic member 300 is connected between the handheld base frame 100 and the sliding member 200, and then the initial state has a pre-tightening force, that is, a constant pressure can be applied to the sliding member 200 from the beginning. Wherein the constant force elastic member 300 can be manufactured according to actual operation requirements, and the requirement that the constant pressure of the sliding member 200 can be provided at the preset sliding displacement is met. In addition, each component in the present application can be manufactured by a 3D printing apparatus without limitation.
By the structural design, in the application of the ablation, the contact force between the catheter and the tissue in the ablation can be well controlled, and in the EBI measurement, the contact force between the electrode probe and the tissue can be well controlled, so that the operation quality is improved; the pressure control device can be well used in operations needing to control the pressure on the fragile tissues such as the brain, the blood vessels and the like, and can not cause unnecessary damage to the tissues; the tissue displacement caused by liver pulsation or respiration and the like in the operation can be quickly compensated, and the constant force is kept; the method has the advantages of good reliability and high compensation response speed when the tissue generates displacement. Moreover, the structural design of the application also has the advantages of simple structure, low cost, disposability, good portability, convenient sterilization, safety and no radiation. Furthermore, the constant force elastic member 300 is detachably disposed, so that different constant force elastic members 300 can be conveniently replaced to adjust the magnitude of the constant force.
The above is a first embodiment of the constant-force handheld device for a medical scene provided in the present application, and the following is a second embodiment of the constant-force handheld device for a medical scene provided in the present application, specifically referring to fig. 1 to fig. 7.
The scheme based on the first embodiment is as follows:
further, the handheld pedestal 100 is provided with a first stopping portion for abutting against the sliding member 200 in an initial state, and the handheld pedestal 100 is further provided with a second stopping portion for forming a limiting sliding area for the sliding member 200 to slide between the second stopping portion and the first stopping portion, so that the sliding displacement of the sliding member 200 can be limited, and a better sliding fit can be realized.
Further, the structure of the handheld base frame 100 includes a U-shaped frame 1 and a cover plate 2. The frame 1 comprises a bottom frame 11 and two side frames 12, wherein the two side frames 12 are vertically connected to two ends of the top of the bottom frame 11; the frame 1 may be an integrally formed structure, that is, the side frame 12 and the bottom frame 11 are integrally connected. The cover plate 2 is arranged at the tops of the two side frames 12, and the cover plate 2 can be fixedly arranged by means of fasteners such as adhesive, clamping and screws, and is not limited specifically. In addition, in the present embodiment, in order to facilitate the holding of the frame 1, the outer wall surfaces of the two side frames 12 may be respectively provided with anti-slip stripes 122, which is not limited specifically.
The sliding member 200 comprises a sliding block 3 in an inverted U shape and a hollow tube 4, wherein the sliding block 3 comprises a top plate 31 and two side plates 32, and the two side plates 32 are vertically connected to two side positions of the bottom of the top plate 31; similarly, the sliding block 3 may be an integrally formed structure, that is, the side plate 32 and the top plate 31 are integrally connected.
The sliding block 3 is arranged between the two side frames 12 in a sliding mode, and the U-shaped groove of the sliding block 3 can be used for the bottom frame 11 to movably extend into, so that the sliding fit between the sliding block 3 and the frame 1 is achieved. The cover plate 2 forms a first stop portion for contacting against the top of the top plate 31 in the initial state, and the bottom frame 11 forms a second stop portion for contacting against the bottom of the top plate 31.
The hollow pipe 4 is vertically connected with the hollow pipe 4 and movably penetrates through the cover plate 2, and the hollow pipe 4 can also be integrally connected with the sliding block 3. The electrode element 400 is arranged at one end of the hollow tube 4 far away from the top plate 31; in design, the through cavity 41 of the hollow tube 4 penetrates through the top plate 31 to form a wiring channel for the lead of the electrode element 400 to pass through, and the bottom frame 11 is correspondingly provided with the communicating hole 111 corresponding to the through cavity 41, so that hidden wiring of the electrode element 400 is facilitated, and the use convenience is improved.
Those skilled in the art can make appropriate changes based on the above structural design without limitation.
Further, in terms of specific sliding fit, the inner side walls of the two side frames 12 are respectively provided with sliding grooves 121 distributed along a straight line, and each sliding groove 121 respectively extends upwards to penetrate out of the top of the corresponding side frame 12, so that the sliding installation of the sliding block 3 is facilitated. And two end faces of the top plate 31 are respectively provided with a guide protrusion 311 extending into the sliding groove 121 and slidably fitting with the sliding groove 121, and the sliding fitting is realized by the fitting between the guide protrusion 311 and the slider 3.
In addition, in this application, the initial pre-tightening force of the constant force spring, that is, the initial deformation amount of the constant force elastic member 300, can be adjusted through the cover plate 2. Specifically, the loading protrusion 21 movably inserted into the sliding groove 121 may be disposed at the bottom of the cover plate 2, and the loading protrusion 21 may be used to push the slider 3 for a certain displacement after the cover plate 2 is mounted, so that the constant force elastic member 300 has an initial deformation amount. The variation of the initial deformation amount can be realized by changing the thickness of the loading protrusion 21, and is not limited in particular.
Further, the constant force elastic member 300 is embodied as a non-linear constant force spring. The structure of the constant force elastic member 300 can be made according to actual surgical requirements.
Further, taking the constant force elastic member 300 as a non-linear constant force spring as an example, the number of the constant force elastic member 300 may be two. The two constant-force elastic members 300 are correspondingly arranged on the outer side surfaces of the two side plates 32 one by one and are distributed in a cross way in different surfaces, so that the pressure applied to the sliding member 200 is more balanced.
Specifically, one end of each of the two constant force elastic members 300 is fixedly connected to the corresponding side frame 12 in a one-to-one correspondence manner, that is, one end of one constant force elastic member 300 is connected to the corresponding side frame 12, and one end of the other constant force elastic member 300 is connected to the corresponding other side frame 12. The other ends of the two constant force elastic members 300 are rotatably connected to the side plates 32 in a one-to-one correspondence manner, that is, the other end of one constant force elastic member 300 is connected to the corresponding one of the side plates 32, and the other end of the other constant force elastic member 300 is connected to the corresponding other side plate 32, so that the two constant force elastic members 300 are finally distributed in a cross manner in a non-coplanar manner.
The structure of the constant force elastic member 300 in the present application can be designed as the structure shown in fig. 5, and is composed of an inclined section 301 and an arc-shaped section 302, wherein one end of the inclined section 301 forms one end of the constant force elastic member 300, the other end is connected with one end of the arc-shaped section 302, and the other end of the arc-shaped section 302 forms the other end of the constant force elastic member 300. Wherein, the other end of the arc-shaped segment 302 is arranged near one side surface of the inclined segment 301. The thickness of the inclined section 301 and the arc-shaped section 302 can be designed to be 0.8mm, and the width can be designed to be 3 mm.
Taking the structure design of the constant-force elastic member 300 shown in fig. 3 as an example, simulation analysis is performed, and the material of the spring is the default setting of PLA in ANSYS software. The result of the simulated deformation of the constant force spring 300 when the end portion is moved down by 35mm is shown in fig. 6. The FES results show a maximum stress of 57MPa, less than 88% of the tensile yield strength (65MPa) of PLA. Again, the resultant displacement characteristic of the constant force spring 300 is shown in FIG. 7, after a 9mm preload, a subsequent constant force of 26mm (about 0.55N) is achieved. The lower relative standard deviation of the output force over the final 26mm displacement range was 0.55 ± 0.03N. The amount of preload of the slider 3 can be controlled to be 9mm by simulation analysis, that is, the thickness of the loading protrusion 21 can be designed to be 9mm, so that the constant-force elastic member 300 has an initial deformation amount of 9mm in an initial state after being connected between the handheld base frame 100 and the slider 200, and when the slider 200 slides within a sliding displacement amount of 26mm, the constant-force elastic member 300 can provide a constant pressure to the slider 200.
Furthermore, in order to facilitate the connection and the matching between the side frames 12 and one end of the constant force elastic member 300, the side end surfaces of the two side frames 12 are respectively provided with the extending portions 13, and the two extending portions 13 are rotationally symmetric with respect to the vertical central line of the bottom frame 11, so as to ensure that the connected constant force elastic members 300 are in cross distribution in different planes. The inner wall surface of each extension part 13 is provided with a clamping groove 131, the clamping groove 131 is specifically arranged at the upper part of the inner wall surface of the extension part 13, the clamping groove 131 is provided with an opening which upwards penetrates out of the top of the side frame 12 and is used for clamping one end of the corresponding constant-force elastic part 300, and the bottom of the cover plate 2 forms a seal for the opening of the clamping groove 131.
Specifically, the locking groove 131 may be a T-shaped groove, one end of the constant-force elastic member 300 is provided with a first connecting portion 51 adapted to the T-shaped groove, and the first connecting portion 51 is a T-shaped locking block.
Further, the other end of the constant force spring is provided with a second connecting portion 52, and the outer side surface of the side plate 32 is provided with a third connecting portion 321 which is rotatably matched with the second connecting portion 52.
Further, the third connecting portion 321 is a connecting column, and the second connecting portion 52 is a connecting sleeve rotatably sleeved on the third connecting portion 321.
The constant-force handheld device of the present application may be composed by aligning the guide protrusion 311 with the sliding groove 121, and mounting the slider 3 on the frame 1; then, the first connecting parts 51 of the two constant-force elastic pieces 300 are respectively clamped into the clamping grooves 131; the cover plate 2 is sleeved on the hollow pipe 4 and is fixedly installed on the frame 1, so that the limiting fixation of the sliding block 3 and the fixation of the first connecting part 51 are realized; then, the second connecting parts 52 of the two constant-force elastic parts 300 are respectively sleeved on the third connecting parts 321 on the side plates 32; and finally, the electrode element 400 is arranged at the tail end of the hollow tube 4 and is wired, and then the assembly is completed. The force handheld device has the advantages of being low in cost, high in reliability, fast in response speed, disposable, good in portability, safe, free of radiation, certain in compliance and capable of tracking and compensating tissue movement.
While the present application provides a constant force handheld device for medical scenes, it will be apparent to those skilled in the art that the present invention can be practiced without these specific details.
Claims (10)
1. A constant force handheld device for medical scenes is characterized by comprising a handheld base frame, a sliding part, a constant force elastic part and an electrode part;
the sliding piece is arranged on the handheld base frame and is in sliding fit with the handheld base frame along a linear direction;
the electrode element is connected to the sliding element along the straight line direction;
the constant-force elastic piece is detachably connected between the handheld base frame and the sliding piece and is used for providing constant pressure of the sliding piece within a preset sliding displacement amount;
when the sliding part is in an initial state, the sliding part is contacted and propped against the handheld base frame under the pressure action of the constant-force elastic part.
2. The constant-force handheld device for medical scenes of claim 1, characterized in that the handheld base frame is provided with a first stop for contacting against the slide in the initial state;
the handheld base frame is further provided with a second stopping part, and a limiting sliding area for the sliding part to slide is formed between the second stopping part and the first stopping part.
3. The constant force handheld device of claim 2, wherein the handheld base frame comprises a U-shaped frame and a cover plate;
the frame comprises a bottom frame and two side frames;
the two side frames are vertically connected to the two ends of the top of the bottom frame;
the cover plate is arranged at the tops of the two side frames;
the sliding piece comprises an inverted U-shaped sliding block and a hollow pipe;
the sliding block comprises a top plate and two side plates;
the two side plates are vertically connected to the two side edges of the bottom of the top plate;
the sliding block is slidably arranged between the two side frames, and a U-shaped groove of the sliding block can be used for the bottom frame to movably extend into;
the cover plate forms the first stopping part and is used for abutting against the top of the top plate in a contact manner in an initial state;
the bottom frame forms a second stopping part which can be contacted and abutted with the bottom of the top plate;
the hollow pipe is vertically connected with the hollow pipe and movably penetrates through the cover plate;
the electrode piece is arranged at one end of the hollow pipe far away from the top plate;
the through cavity of the hollow pipe penetrates through the top plate to form a wiring channel for the lead of the electrode piece to pass through;
and the bottom frame is provided with a communicating hole corresponding to the through cavity.
4. The constant-force handheld device for medical scenes of claim 3, wherein the inner side walls of the two side frames are respectively provided with a sliding groove;
each sliding groove respectively upwards penetrates out of the top of the corresponding side frame;
and guide bulges which extend into the sliding grooves and are in sliding fit with the sliding grooves are respectively arranged on two end faces of the top plate.
5. The constant-force handheld device for use in medical settings of claim 4, wherein the constant-force elastic member is embodied as a non-linear constant-force spring.
6. The constant force handheld device of claim 5, wherein the number of the constant force elastic members is two;
the two constant-force elastic pieces are correspondingly arranged on the outer side surfaces of the two side plates one by one and are distributed in a cross way in a different surface way;
one ends of the two constant-force elastic pieces are fixedly connected to the side frames in a one-to-one correspondence manner;
the other ends of the two constant-force elastic pieces are rotatably connected to the side plates in a one-to-one correspondence manner.
7. The constant-force handheld device for medical scenes of claim 6, characterized in that one side end face of each of the two side frames is provided with an extension;
the two extending parts are rotationally symmetrical relative to the vertical central line of the bottom frame;
the inner wall surface of each extension part is provided with a clamping groove;
the clamping groove is provided with an opening which upwards penetrates out of the top of the side frame and is used for clamping one end of the corresponding constant-force elastic piece;
the bottom of the cover plate seals the opening of the clamping groove.
8. The constant force handheld device of claim 7, wherein the slot is a T-slot;
one end of the constant-force elastic piece is provided with a first connecting part matched with the T-shaped groove;
the first connecting part is a T-shaped clamping block.
9. The constant-force handheld device for medical scenes of claim 6, characterized in that the other end of the constant-force spring is provided with a second connecting part;
and a third connecting part which is rotatably matched with the second connecting part is arranged on the outer side surface of the side plate.
10. The constant force handheld device for use in a medical setting of claim 9, wherein the third connection portion is a connection post;
the second connecting part is a connecting sleeve, and the third connecting part is rotatably sleeved with the second connecting part.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110990777.7A CN113598932B (en) | 2021-08-26 | 2021-08-26 | Constant-force handheld device for medical scene |
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| CN202110990777.7A CN113598932B (en) | 2021-08-26 | 2021-08-26 | Constant-force handheld device for medical scene |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200015783A1 (en) * | 2016-12-20 | 2020-01-16 | New York Society For The Ruptured And Crippled Maintaining The Hospital For Special Surgery | Constant force ultrasound probe handle |
| CN111062161A (en) * | 2019-12-11 | 2020-04-24 | 浙江大学 | Large-tension high-stability light and small constant force device |
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- 2021-08-26 CN CN202110990777.7A patent/CN113598932B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200015783A1 (en) * | 2016-12-20 | 2020-01-16 | New York Society For The Ruptured And Crippled Maintaining The Hospital For Special Surgery | Constant force ultrasound probe handle |
| CN111062161A (en) * | 2019-12-11 | 2020-04-24 | 浙江大学 | Large-tension high-stability light and small constant force device |
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| CN113598932B (en) | 2022-12-23 |
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