Arm fixing device for coronary intervention treatment

Abstract

The application relates to the technical field of medical devices, and discloses an arm fixing device for coronary intervention treatment, which comprises a base, wherein an arc-shaped groove is arranged on the base; unidirectional screws are rotationally connected to the two sides of the arc-shaped groove on the base; lifting blocks are threadedly connected to the unidirectional screws; guide rods are arranged on the two sides of the arc-shaped groove on the base; the lifting blocks are slidably connected with the guide rods; a top base is arranged between the two lifting blocks; a first elastic block is connected to the top base and located directly above the arc-shaped groove; second elastic blocks are arranged on the two sides of the first elastic block on the top base; the arm fixing device further comprises a driving mechanism for driving the two unidirectional screws to rotate simultaneously and a linkage mechanism for driving the two second elastic blocks to clamp the arm when the top base moves vertically. The scheme mainly solves the problem that the existing arm fixing device has poor limiting effect on the arm.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an arm fixation device for coronary interventional therapy. Background Technology

[0002] Interventional vascular surgery is a minimally invasive procedure that involves inserting diagnostic or therapeutic instruments into the lesion of a blood vessel to diagnose and treat cardiovascular and cerebrovascular diseases. Common cardiovascular interventional procedures involve percutaneous punctures in the femoral or radial artery, followed by the insertion of contrast agents or corrective stents to forcibly repair narrowed lesions. Interventional techniques offer accurate diagnosis, thorough treatment, and minimal trauma, making them the most advanced technology for diagnosing and treating narrowed cardiovascular and cerebrovascular diseases, particularly coronary artery atherosclerosis. However, during coronary intervention, any movement of the patient's arm can significantly impact the surgeon's experience, increasing the difficulty of the procedure and potentially leading to vascular puncture and severe harm to the patient.

[0003] To address the aforementioned issues, Chinese Patent Publication No. CN215537388U discloses an arm fixation device for coronary intervention, comprising: a frame assembly including an arm support plate and a semi-circular, unsealed support frame mounted on the top of the arm support plate; a limiting mechanism including a threaded rod disposed on the top of the support frame, extending through the surface of the support frame and into the arm support plate, and an external thread disposed on the surface of the threaded rod; two support legs are fixed to the outer side of the arm support plate, and the support legs are made of a rigid material; this patent can fix the arm during coronary intervention, thereby preventing the patient's arm from shaking.

[0004] In actual use, the aforementioned patent mainly uses a limiting plate and an arm support plate to clamp the arm vertically. That is, the curved surfaces of the limiting plate and the arm support plate are used to press the arm against the arm from above and below. However, only a portion of the curved surfaces of the limiting plate and the arm support plate press against the arm. Furthermore, the areas where the arm is not pressed against are mainly concentrated on the sides of the arm, meaning there is no limiting structure on the sides of the arm. This allows the arm to move slightly in the horizontal direction, resulting in poor limiting effect on the arm. Summary of the Invention

[0005] The present invention aims to provide an arm fixation device for coronary interventional therapy, in order to solve the problem that existing arm fixation devices have poor arm restraint effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an arm fixation device for coronary interventional therapy, comprising a base with an arc-shaped groove; one-way screws rotatably connected to both sides of the arc-shaped groove on the base, and lifting blocks threadedly connected to the one-way screws; guide rods provided on both sides of the arc-shaped groove on the base, and the lifting blocks slidably connected to the guide rods; a top seat provided between the two lifting blocks, a first elastic block connected to the top seat, the first elastic block being located directly above the arc-shaped groove; second elastic blocks provided on both sides of the first elastic block on the top seat; and further comprising a drive mechanism for driving the two one-way screws to rotate simultaneously and a linkage mechanism for driving the two second elastic blocks to clamp the arm as the top seat moves vertically.

[0007] The principle and advantages of this scheme are:

[0008] 1. In this solution, the arm is placed in the arc-shaped groove, and the arm is located directly below the first elastic block. The drive mechanism drives two one-way screws to rotate simultaneously, causing the lifting block to move downward along the path of the guide rod. The lifting block drives the top seat to move downward, which in turn drives the first elastic block to move downward, so that the first elastic block abuts against the arm. The arm is then clamped vertically by the first elastic block and the arc-shaped groove. Compared with the prior art, in this solution, during the downward movement of the top seat, the top seat also drives two second elastic blocks to clamp the arm through the linkage mechanism, that is, clamping the arm horizontally, thereby preventing the arm from moving horizontally and strengthening the limiting effect on the arm.

[0009] 2. This solution clamps the arm vertically using the first elastic block and the arc groove, and clamps the arm horizontally using the two second elastic blocks, thereby preventing the arm from moving in the vertical and horizontal directions and ensuring the stability of the arm's position.

[0010] Furthermore, the second elastic block is arc-shaped, with its protrusions facing the base, and is tilted. The linkage mechanism includes linkage parts located on both sides of the first elastic block, and the top seat can drive the two ends of the second elastic block to move closer together through the linkage parts.

[0011] With the above configuration, during the downward movement of the top seat, the top seat drives the two ends of the second elastic block to move closer together through the linkage, thereby increasing the convexity of the second elastic block and causing the second elastic block to abut against the side of the arm, that is, clamping the arm by the two second elastic blocks.

[0012] Furthermore, the linkage mechanism also includes columns located on both sides of the arc-shaped groove, the columns being fixedly connected to the base, and a top block being provided between the two columns, the top block being located above the top seat; the linkage part includes a vertical block and a first inclined groove opened on the side wall of the top seat, the vertical block being fixedly connected to the top block; the distance between the two first inclined grooves gradually increases from top to bottom, a guide block is slidably connected in the first inclined groove, the guide block being fixedly connected to the end of the second elastic block away from the top seat; a linkage arm is hinged on the guide block, the end of the linkage arm away from the guide block being hinged to the vertical block.

[0013] With the above configuration, during the rotation of the unidirectional screw, the lifting block moves downward along the path of the guide rod, and the lifting block drives the top seat to move downward. During the downward movement of the top seat, the distance between the top seat and the top block gradually increases. Since the vertical block is fixed to the top block, the vertical block pulls the guide block along the path of the first inclined groove and slides upward. During the movement of the guide block, the guide block will drive the movable end of the second elastic block to move closer to the fixed end of the second elastic block, that is, the two ends of the second elastic block move closer, which increases the convexity of the second elastic block and makes the second elastic block abut against the side of the arm.

[0014] Furthermore, the top seat has two second inclined grooves on both sides of its side wall, with the two second inclined grooves located between the two first inclined grooves, and the distance between the two second inclined grooves gradually decreasing from top to bottom; a movable block is slidably connected in the second inclined groove, and a first spring is provided between the movable block and the second inclined groove; a push block is provided on the side wall of the guide block, and the push block abuts against the movable block; the two ends of the first elastic block are respectively fixed to the bottom of the two movable blocks, the first elastic block is arc-shaped, and the protrusion of the first elastic block is set towards the base.

[0015] With the above settings, during the movement of the guide block, the guide block will also drive the push block to move towards the direction of the movable block, so that the push block squeezes the movable block to slide downward along the path of the second inclined groove, that is, the distance between the two movable blocks decreases and the first spring is compressed; during the period when the distance between the two movable blocks decreases, the two ends of the first elastic block approach each other, so that the convexity of the first elastic block increases; and, since the movable block slides downward along the path of the second inclined groove, the movable block will also drive the first elastic block to move downward, so that the first elastic block abuts against the top of the arm.

[0016] Furthermore, the bottom of the first elastic block is provided with a first rubber layer; the bottom of the second elastic block is provided with a second rubber layer.

[0017] With the above configuration, because the first rubber layer is elastic, the first elastic layer deforms in the opposite direction to the convex direction of the first elastic block when blocked by the arm, thereby increasing the contact area between the first elastic layer and the arm, and thus strengthening the restraining effect on the arm; because the second rubber layer is elastic, the second elastic layer deforms in the opposite direction to the convex direction of the second elastic block when blocked by the arm, thereby increasing the contact area between the second elastic layer and the arm, and thus strengthening the restraining effect on the arm.

[0018] Because the protrusion direction of the first elastic block is opposite to the deformation direction of the first elastic layer, the deformation effect of the first rubber layer is maximized. Furthermore, because the first rubber layer has an elastic layer, the reaction force of the first rubber layer is applied to the arm, thereby ensuring more sufficient contact, higher fit, and better clamping effect. Similarly, because the protrusion direction of the second elastic block is opposite to the deformation direction of the second elastic layer, the deformation effect of the second rubber layer is maximized. Furthermore, because the second rubber layer has an elastic layer, the reaction force of the second rubber layer is applied to the arm, thereby ensuring more sufficient contact, higher fit, and better clamping effect.

[0019] Furthermore, a fixed block is provided on the top seat, which is located between two movable blocks; a vertical groove is provided at the bottom of the fixed block, and an adjusting block is slidably connected in the vertical groove; a second spring is provided between the adjusting block and the fixed block; limiting blocks are provided on both sides of the top of the adjusting block; side grooves communicating with the vertical groove are provided on both sides of the adjusting block; an inclined block is provided on the side wall of the movable block, and the inclined block is slidably connected to the side groove; the top of the limiting block abuts against the bottom of the inclined block; a limiting groove is provided at the bottom of the inclined block; the limiting block is located on the movement trajectory of the limiting groove; and the limiting block and the limiting groove are slidably engaged.

[0020] With the above settings, during the movement of the movable block, the movable block drives the tilting block to move synchronously. When the one-way screw stops rotating, the limiting block and the limiting groove are vertically opposite each other, so that the adjusting block moves upward under the action of the second spring. The adjusting block drives the limiting block to slide into the limiting groove, thereby realizing the positioning of the tilting block, and then realizing the positioning of the movable block, that is, realizing the positioning of the first elastic block and the first elastic layer. This can improve the clamping effect of the first elastic layer on the arm, and thus improve the stability of the arm limiting.

[0021] Furthermore, a positioning block is provided on the top seat, which is located below the adjusting block; a swing block is hinged to the adjusting block, and a positioning hole is provided on the swing block, with the positioning block and the positioning hole slidingly engaged.

[0022] With the above settings, when the tilting block needs to move in the opposite direction, the swing block pulls the adjusting block downward, causing the limiting block to slide out of the limiting groove. Then, the swing block is rotated so that the positioning block slides into the positioning hole, thereby positioning the swing block and the adjusting block, so that the tilting block moves in the opposite direction and the limiting block will not affect its movement.

[0023] Furthermore, both sides of the arc-shaped groove are provided with grooves, and a round shaft is rotatably connected in the groove. A torsion spring is provided between the round shaft and the groove. A clamping arm is provided on the round shaft, and an adjustment part is also included that drives the two clamping arms to rotate as the one-way screw rotates. The two clamping arms rotate in opposite directions.

[0024] With the above settings, during the rotation of the one-way screw, the one-way screw drives the two clamping arms to rotate through the adjustment part, and then the clamping arms drive the round shaft to rotate synchronously. The torsion spring deforms, that is, the two clamping arms come closer together, and then the two clamping arms clamp the arm, thereby achieving the limitation of the arm in the horizontal direction, thus strengthening the limitation effect of the arm.

[0025] Furthermore, the two second elastic layers clamp the arm at different positions than the two clamping arms, thus enabling the arm to be clamped from different positions in the horizontal direction, increasing the clamping area and enhancing the limiting effect on the arm.

[0026] Furthermore, the adjustment part includes a chamber opened in the base and a bidirectional screw rotatably connected to the chamber, the chamber communicating with the groove; a first bevel gear is provided on the bidirectional screw, a unidirectional screw extends into the chamber, and a second bevel gear meshing with the first bevel gear is provided on a unidirectional screw; both ends of the bidirectional screw are threadedly connected to transverse blocks for squeezing the clamping arm, the clamping arm is located on the movement trajectory of the transverse block, and the transverse block is slidably connected to the chamber.

[0027] With the above configuration, during the rotation of the unidirectional screw, the unidirectional screw drives the first bevel gear to rotate, and the first bevel gear meshes with the second bevel gear to drive the bidirectional screw to rotate; during the rotation of the bidirectional screw, the transverse blocks move along the axial direction of the bidirectional screw, thereby bringing the two transverse blocks closer together; during the movement of the transverse blocks, the transverse blocks squeeze the clamping arms to rotate, thereby causing the clamping arms to drive the round shaft to rotate synchronously, and the torsion spring to deform, that is, the two clamping arms move closer together, thereby clamping the arm through the two clamping arms.

[0028] Furthermore, the clamping arm is arc-shaped and has a third rubber layer.

[0029] With the above configuration, the third rubber layer is elastic and directly contacts the arm instead of the clamping arm, resulting in better comfort. The third rubber layer is also extensible, allowing it to deform and press against the arm, increasing the contact area and thus enhancing the arm's restraint effect. Attached Figure Description

[0030] Figure 1 This is a partial sectional view from the front view of an embodiment of an arm fixation device for coronary interventional therapy according to the present invention;

[0031] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0032] Figure 3 for Figure 1 Enlarged view of section B in the middle. Detailed Implementation

[0033] The following detailed description illustrates the specific implementation method:

[0034] The reference numerals in the accompanying drawings include: base 10, arc groove 11, one-way screw 12, lifting block 13, guide rod 14, top seat 20, first elastic block 21, second elastic block 22, vertical block 23, first inclined groove 24, guide block 25, linkage arm 26, column 30, top block 31, second inclined groove 40, movable block 41, first spring 42, push block 43, first rubber layer 44, second rubber layer 45, fixing block 50, vertical groove 51, adjusting block 52, second spring 53, limiting block 54, inclined block 55, limiting groove 56, positioning block 57, swing block 58, round shaft 60, clamping arm 61, third rubber layer 62, chamber 70, two-way screw 71, first bevel gear 72, second bevel gear 73, horizontal block 74, motor 80, sprocket 81, chain 82.

[0035] Example

[0036] The basics are as follows: Figure 1 Appendix Figure 2 and attached Figure 3 As shown: A coronary intervention arm fixation device includes a base 10 with an arc-shaped groove 11 on the base 10; one-way screws 12 are rotatably connected to both sides of the arc-shaped groove 11 on the base 10, and lifting blocks 13 are threadedly connected to the one-way screws 12; guide rods 14 are fixedly connected to both sides of the arc-shaped groove 11 on the base 10, and the lifting blocks 13 are slidably connected to the guide rods 14.

[0037] A top seat 20 is fixed between the two lifting blocks 13. A first elastic block 21 is connected to the top seat 20 and is located directly above the arc groove 11. Second elastic blocks 22 are fixed on both sides of the top seat 20 at the first elastic block 21. The system also includes a drive mechanism for driving the two one-way screws 12 to rotate simultaneously and a linkage mechanism for driving the two second elastic blocks 22 to clamp the arm as the top seat 20 moves vertically.

[0038] The second elastic block 22 is arc-shaped, with its protrusion facing the base 10. The second elastic block 22 is inclined, and the two second elastic blocks 22 are symmetrically arranged. The linkage mechanism includes linkage parts located on both sides of the first elastic block 21. The top seat 20 can drive the two ends of the second elastic block 22 closer together through the linkage parts. The linkage mechanism also includes columns 30 located on both sides of the arc-shaped groove 11. The columns 30 are fixedly connected to the base 10, and a top block 31 is fixedly connected between the two columns 30. The top block 31 is located on the top... Above the seat 20; the linkage part includes a vertical block 23 and a first inclined groove 24 opened on the side wall of the top seat 20. The vertical block 23 is fixedly connected to the top block 31. The distance between the two first inclined grooves 24 gradually increases from top to bottom. A guide block 25 is slidably connected in the first inclined groove 24. One end of the second elastic block 22 is fixedly connected to the top seat 20, and the other end of the second elastic block 22 is fixedly connected to the guide block 25. A linkage arm 26 is hinged on the guide block 25. The end of the linkage arm 26 away from the guide block 25 is hinged to the vertical block 23.

[0039] The top seat 20 has two second inclined grooves 40 on both sides of its sidewall. The two second inclined grooves 40 are located between the two first inclined grooves 24, and the distance between the two second inclined grooves 40 gradually decreases from top to bottom. A movable block 41 is slidably connected in the second inclined groove 40, and a first spring 42 is fixed between the movable block 41 and the second inclined groove 40. A push block 43 is fixed on the sidewall of the guide block 25, and the push block 43 abuts against the movable block 41. The two ends of the first elastic block 21 are fixed to the bottom of the two movable blocks 41 respectively. The first elastic block 21 is arc-shaped, and the protrusion of the first elastic block 21 is set towards the base 10. A first rubber layer 44 is fixed to the bottom of the first elastic block 21; a second rubber layer 45 is fixed to the bottom of the second elastic block 22.

[0040] A fixed block 50 is fixedly connected to the top seat 20, and the fixed block 50 is located between two movable blocks 41. A vertical groove 51 is opened at the bottom of the fixed block 50, and an adjusting block 52 is slidably connected in the vertical groove 51. A second spring 53 is fixedly connected between the adjusting block 52 and the fixed block 50. Limiting blocks 54 are fixedly connected to both sides of the top of the adjusting block 52. Side grooves communicating with the vertical groove 51 are opened on both sides of the adjusting block 52. The side grooves are inclined. An inclined block 55 is fixedly connected to the side wall of the movable block 41. The inclined block 55 is slidably connected to the side groove. The top of the limiting block 54 abuts against the bottom of the inclined block 55. A limiting groove 56 is opened at the bottom of the inclined block 55. The limiting block 54 is located on the movement trajectory of the limiting groove 56. The limiting block 54 and the limiting groove 56 are slidably engaged. In the initial state, the top of the limiting block 54 abuts against the bottom of the inclined block 55, and the second spring 53 is stretched. A positioning block 57 is fixedly connected to the top seat 20, and the positioning block 57 is located below the adjusting block 52; a swing block 58 is hinged to the adjusting block 52, and a positioning hole is opened on the swing block 58, and the positioning block 57 slides with the positioning hole.

[0041] Both sides of the arc-shaped groove 11 have grooves, and a round shaft 60 is rotatably connected in the groove. A torsion spring is fixed between the round shaft 60 and the groove. A clamping arm 61 is fixedly connected to the round shaft 60. The clamping arm 61 is arc-shaped and includes an adjustment part that drives the two clamping arms 61 to rotate as the one-way screw 12 rotates. The two clamping arms rotate in opposite directions. The adjustment part includes a chamber 70 opened in the base 10 and a bidirectional screw 71 rotatably connected to the chamber 70. The chamber 70 communicates with the groove. A first bevel gear 72 is fixedly connected to the bidirectional screw 71. The one-way screw 12 extends into the chamber 70. A second bevel gear 73 that meshes with the first bevel gear 72 is fixedly connected to one of the one-way screws 12. Both ends of the bidirectional screw 71 are threadedly connected to a transverse block 74 for pressing the clamping arm 61. The clamping arm 61 is located on the movement trajectory of the transverse block 74. The transverse block 74 is slidably connected to the chamber 70.

[0042] The drive mechanism is located inside the chamber 70. The drive mechanism includes a motor 80 and two sprockets 81. The motor 80 is a servo motor 80. The motor 80 is fixedly connected inside the chamber 70. The output shaft of the motor 80 is fixedly connected to a one-way screw 12, and the other one-way screw 12 is rotatably connected to the chamber 70. The two sprockets 81 are respectively fixedly connected to the two one-way screws 12, and a chain 82 is sleeved between the two sprockets 81.

[0043] The specific implementation process is as follows:

[0044] In use, place the arm in the arc-shaped groove 11, with the arm directly below the first elastic block 21; start the motor 80, and the output shaft of the motor 80 drives the one-way screw 12 to rotate, and then the sprocket 81 on the one-way screw 12 rotates synchronously. Under the action of the chain 82, the two sprockets 81 rotate synchronously, and thus the two one-way screws 12 rotate.

[0045] During the rotation of the one-way screw 12, the lifting block 13 moves downward along the path of the guide rod 14, and the lifting block 13 drives the top seat 20 to move downward. During the downward movement of the top seat 20, the distance between the top seat 20 and the top block 31 gradually increases. Since the vertical block 23 is fixedly connected to the top block 31, the vertical block 23 pulls the guide block 25 along the path of the first inclined groove 24 through the linkage arm 26 and slides upward at an incline. During the movement of the guide block 25, the guide block 25 will drive the movable end of the second elastic block 22 to move closer to the fixed end of the second elastic block 22, that is, both ends of the second elastic block 22. As the arm moves closer, the convexity of the second elastic block 22 increases, causing the second elastic layer to abut against the side of the arm. The guide block 25 continues to move, and because the second rubber layer 45 is elastic, the second elastic layer is deformed in the opposite direction of the convexity of the second elastic block 22 due to the obstruction of the arm, thereby increasing the contact area between the second elastic layer and the arm. At this time, the motor 80 can be turned off, and the one-way screw 12 stops rotating, thus achieving the positioning of the second elastic layer. Therefore, the two second elastic layers can clamp the arm in the horizontal direction, thereby achieving the limitation of the arm.

[0046] During the movement of the guide block 25, the guide block 25 also drives the push block 43 to move towards the movable block 41, causing the push block 43 to press the movable block 41 to slide downward along the path of the second inclined groove 40, that is, the distance between the two movable blocks 41 decreases, and the first spring 42 is compressed; during the period when the distance between the two movable blocks 41 decreases, the two ends of the first elastic block 21 move closer, which increases the convexity of the first elastic block 21; and, since the movable block 41 slides downward along the path of the second inclined groove 40, the movable block 41 also drives the first elastic block 21 to move downward, so that the first elastic layer abuts against the top of the arm; the movable block 41 continues to move, and since the first rubber layer 44 has extensibility, the first elastic layer is blocked by the arm and deforms in the opposite direction to the convex direction of the first elastic block 21, thereby increasing the contact area between the first elastic layer and the arm. At this time, the one-way screw 12 stops rotating, and the first elastic layer is also positioned; therefore, by the cooperation of the first elastic layer and the arc groove 11, the arm can be clamped from the vertical direction, thereby achieving the limitation of the arm.

[0047] Because the protrusion direction of the first elastic block 21 is opposite to the deformation direction of the first elastic layer, the deformation effect of the first rubber layer 44 is maximized. Furthermore, because the first rubber layer 44 has an elastic layer, its reaction force is applied to the arm, thus ensuring more sufficient contact, higher fit, and better clamping effect. Similarly, because the protrusion direction of the second elastic block 22 is opposite to the deformation direction of the second elastic layer, the deformation effect of the second rubber layer 45 is maximized. Furthermore, because the second rubber layer 45 has an elastic layer, its reaction force is applied to the arm, thus ensuring more sufficient contact, higher fit, and better clamping effect.

[0048] During the movement of the movable block 41, the movable block 41 drives the tilting block 55 to move synchronously. When the one-way screw 12 stops rotating, the limiting block 54 and the limiting groove 56 are vertically opposite each other, causing the adjusting block 52 to move upward under the action of the second spring 53. The adjusting block 52 drives the limiting block 54 to slide into the limiting groove 56, thereby achieving the positioning of the tilting block 55, and thus the positioning of the movable block 41, that is, the positioning of the first elastic block 21 and the first elastic layer. This can improve the clamping effect of the first elastic layer on the arm, thereby increasing the stability of the arm's positioning. When the tilting block 55 needs to move in the opposite direction, the swing block 58 pulls the adjusting block 52 downward, causing the limiting block 54 to slide out of the limiting groove 56. Then, the swing block 58 is rotated, causing the positioning block 57 to slide into the positioning hole, thereby achieving the positioning of the swing block 58 and the adjusting block 52, so that the tilting block 55 moves in the opposite direction, and the limiting block 54 will not affect its movement.

[0049] During the rotation of the unidirectional screw 12, the unidirectional screw 12 drives the first bevel gear 72 to rotate, and the first bevel gear 72 meshes with the second bevel gear 73 to drive the bidirectional screw 71 to rotate. During the rotation of the bidirectional screw 71, the transverse block 74 moves along the axial direction of the bidirectional screw 71, thereby bringing the two transverse blocks 74 closer together. During the movement of the transverse block 74, the transverse block 74 squeezes the clamping arm 61 to rotate, thereby causing the clamping arm to drive the round shaft 60 to rotate synchronously, and the torsion spring to deform, that is, the two clamping arms 61 move closer together. The transverse block 74 continues to move. When the one-way screw 12 stops rotating, the clamping arm 61 abuts against the side of the arm, that is, the two clamping arms 61 clamp the arm, thereby limiting the arm in the horizontal direction. Therefore, when the one-way screw 12 stops rotating, the arm can be clamped in the vertical direction through the cooperation of the first elastic layer and the arc groove 11, and the arm can be clamped at different positions in the horizontal direction through the two second elastic layers and the two clamping arms 61, thereby preventing the arm from moving in the vertical and horizontal directions and ensuring the stability of the arm limiting.

[0050] In this embodiment, the clamping arm 61 is arc-shaped, and a third rubber layer 62 is fixedly attached to the clamping arm 61. Because the third rubber layer 62 is elastic, it directly contacts the arm instead of the clamping arm 61, resulting in better comfort. Due to the extensibility of the third rubber layer 62, it deforms and abuts against the arm, increasing the contact area and thus strengthening the restraining effect on the arm. The above description is merely an embodiment of the present invention; common technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An arm fixation device for coronary interventional therapy, comprising a base, characterized in that: The base has an arc-shaped groove; one-way screws are rotatably connected to both sides of the arc-shaped groove on the base, and lifting blocks are threaded onto the one-way screws; guide rods are provided on both sides of the arc-shaped groove on the base, and the lifting blocks are slidably connected to the guide rods; a top seat is provided between the two lifting blocks, and a first elastic block is connected to the top seat, which is located directly above the arc-shaped groove; a second elastic block is provided on both sides of the first elastic block on the top seat; it also includes a drive mechanism for driving the two one-way screws to rotate simultaneously and a linkage mechanism for driving the two second elastic blocks to clamp the arms as the top seat moves vertically; the second elastic blocks are arc-shaped, with the protrusions of the second elastic blocks facing the base, and the second elastic blocks are inclined; the linkage mechanism includes linkage parts located on both sides of the first elastic block, through which the top seat can drive the two ends of the second elastic blocks to move closer together; the linkage mechanism also includes columns located on both sides of the arc-shaped groove, the columns are fixed to the base, and a top block is provided between the two columns, located above the top seat; the linkage part includes a vertical block and a first inclined block formed on the side wall of the top seat. The top block is fixedly connected to the vertical block; the distance between the two first inclined grooves gradually increases from top to bottom, and a guide block is slidably connected in the first inclined groove. The guide block is fixedly connected to the end of the second elastic block away from the top seat; a linkage arm is hinged on the guide block, and the end of the linkage arm away from the guide block is hinged to the vertical block; the top seat has two second inclined grooves on both sides of its side wall, and the two second inclined grooves are located between the two first inclined grooves. The distance between the two second inclined grooves gradually decreases from top to bottom; a movable block is slidably connected in the second inclined groove, and a first spring is provided between the movable block and the second inclined groove; a push block is provided on the side wall of the guide block, and the push block abuts against the movable block; the two ends of the first elastic block are fixedly connected to the bottom of the two movable blocks respectively. The first elastic block is arc-shaped, and the convex direction of the first elastic block is set towards the base; the arc-shaped groove has grooves on both sides, and a round shaft is rotatably connected in the groove. A torsion spring is provided between the round shaft and the groove; a clamping arm is provided on the round shaft, and an adjustment part is also included that drives the two clamping arms to rotate with the rotation of the one-way screw. The rotation directions of the two clamping arms are opposite.

2. The arm fixation device for coronary interventional therapy according to claim 1, characterized in that: The bottom of the first elastic block is provided with a first rubber layer; the bottom of the second elastic block is provided with a second rubber layer.

3. The arm fixation device for coronary interventional therapy according to claim 2, characterized in that: A fixed block is provided on the top seat, which is located between two movable blocks. The bottom of the fixed block is provided with a vertical groove, and an adjusting block is slidably connected in the vertical groove. A second spring is provided between the adjusting block and the fixed block. Limiting blocks are provided on both sides of the top of the adjusting block. Side grooves communicating with the vertical groove are provided on both sides of the adjusting block. An inclined block is provided on the side wall of the movable block. The inclined block is slidably connected to the side groove. The top of the limiting block abuts against the bottom of the inclined block. A limiting groove is provided at the bottom of the inclined block. The limiting block is located on the movement trajectory of the limiting groove. The limiting block and the limiting groove are slidably engaged.

4. The arm fixation device for coronary interventional therapy according to claim 3, characterized in that: The top seat is provided with a positioning block, which is located below the adjusting block; a swing block is hinged to the adjusting block, and the swing block is provided with a positioning hole, and the positioning block and the positioning hole slide together.

5. The arm fixation device for coronary interventional therapy according to claim 4, characterized in that: The adjustment unit includes a chamber opened in the base and a bidirectional screw rotatably connected to the chamber. The chamber communicates with the groove. A first bevel gear is provided on the bidirectional screw. A unidirectional screw extends into the chamber. A second bevel gear meshes with the first bevel gear on one of the unidirectional screws. Both ends of the bidirectional screw are threadedly connected to transverse blocks for pressing the clamping arm. The clamping arm is located on the movement trajectory of the transverse block. The transverse block is slidably connected to the chamber.

6. The arm fixation device for coronary interventional therapy according to claim 5, characterized in that: The clamping arm is arc-shaped and has a third rubber layer.

Images