Wedge-shaped positioning base of heart fixator
Through the innovative design of the clamping mechanism, the combination of plastic wedge ribs, fixed wedge blocks and camshafts is used to solve the slippage and tooth collision problems of the cardiac fixator base when locking, achieving zero gap locking and stability at any position, and improving the smoothness of the operation of the operation.
Patent Information
- Application Number
- CN202421630715.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The existing cardiac fixator base has front and back slippage and collision between teeth when locking, making it difficult to achieve zero-gap locking at any position, reducing the stability and practicality of the surgery.
The clamping mechanism, including a combination of plastic wedge ribs and camshafts, is designed to lock at any position by contacting the smooth bevel surface, and slide smoothly when locking is not required; or increase the contact area and friction through the fixed wedge and spiral rod; or locking is achieved by generating friction and squeeze pressure through the camshaft.
Zero gap locking at any position is achieved, which enhances the stability and smooth operation of the cardiac fixator, and avoids displacement and fallout caused by long-term vibration.
Smart Images
Figure CN223126662U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical auxiliary instruments, in particular to a wedge-shaped positioning base of a heart fixator. Background Art
[0002] In recent years, minimally invasive cardiac surgery, especially off-pump coronary artery bypass grafting surgery, has developed rapidly, thus avoiding the adverse consequences caused by extracorporeal circulation surgery to patients. The heart fixator is an important instrument in off-pump coronary artery bypass grafting surgery and is used as a consumable for fixing and bypassing the distal anastomotic site of the coronary artery without stopping the heart.
[0003] During cardiac surgery, the heart fixator reduces the amplitude of the heart by means of negative pressure suction or mechanical extrusion, so as to fix the epicardium and surface tissues of the exposed surgical site and provide a stable operation for the surgery. However, the current base of the heart fixator generally adopts a locking method of upper and lower teeth. When sliding back and forth, the teeth generally collide with each other, making it difficult to slide, and it is impossible to ensure zero clearance when locking at any position, thus reducing the practicability of the heart fixator. Therefore, it is necessary to design a wedge-shaped positioning base of a heart fixator that can be locked at any position and ensure zero clearance. Summary of the Utility Model
[0004] Aiming at the deficiencies of the existing technology, the utility model provides the following technical solution: a wedge-shaped positioning base of a heart fixator, including a fixator body, and a clamping mechanism for fixing the fixator body at any position is movably clamped at the bottom of the fixator body.
[0005] As an improvement of the above technical solution, the clamping mechanism includes a first fixed base, the first fixed base is movably clamped at the bottom of the fixator body, a horizontal card slot is opened on the inner wall of the bottom of the first fixed base, a horizontal card block is movably clamped in the horizontal card slot, a first spring is fixedly installed on the left inner wall of the horizontal card slot, the right end of the first spring is fixedly installed with the horizontal card block, the bottom end of the horizontal card block is fixedly installed with a first sliding base, a swing arm is rotatably connected to the front end of the first fixed base, and the rear end of the swing arm penetrates through the front inner wall of the first fixed base and is fixedly installed with a first camshaft, and the first camshaft is located between the first fixed base and the first sliding base.
[0006] As an improvement of the above technical solution, a plastic wedge-shaped rib is fixedly installed on the left inner wall of the first sliding base, and the bottom of the first fixed base is designed to be inclined.
[0007] As an improvement to the above technical solution, the clamping mechanism includes a second fixed base, which is movably clamped to the bottom of the holder body. A second sliding base is movably clamped to the bottom of the second fixed base. A circular limiting slot is formed inside the second fixed base. A circular block is movably clamped in the circular limiting slot. A screw rod is embedded at the bottom end of the circular block. A first locking handle is fixedly installed at the right end of the screw rod. A fixed wedge block is threadedly connected to the outside of the screw rod. A wedge spring is fixedly installed at the left end of the fixed wedge block. The left end of the wedge spring is fixedly installed on the inner wall of the second fixed base. The fixed wedge block is located between the second fixed base and the second sliding base.
[0008] As an improvement to the above technical solution, the fixed wedge block is movably clamped to the right end of the second fixed base.
[0009] As an improvement to the above technical solution, the clamping mechanism includes a third fixed base, which is movably clamped to the bottom of the holder body. A third sliding base is movably clamped to the bottom of the third fixed base. A second camshaft is rotatably connected to the right inner wall of the third fixed base. The right end of the second camshaft penetrates and extends out of the right side surface of the third fixed base. A second locking handle is movably clamped to the end of the second camshaft extending out of the right side surface of the third fixed base.
[0010] The beneficial effects of the present utility model:
[0011] 1. In the first solution of the clamping mechanism, a plastic wedge-shaped rib is used to position the first fixed base. When positioning, the first camshaft jacks up the plastic wedge-shaped rib to contact two smooth inclined surfaces. It can not only achieve locking at any position, but also ensure zero clearance when locking. When locking is not required, the first camshaft releases the jacking of the plastic wedge-shaped rib. Because it is the sliding between two planes, the sliding is also very smooth.
[0012] 2. In the second solution of the clamping mechanism, a fixed wedge block is used to lock the second fixed base, increasing the contact area between the fixed wedge block and the second fixed base, thereby increasing the friction force, making the second fixed base locked tighter at any position, avoiding displacement during long-term vibration use. At the same time, a screw rod is also used to clamp the workpiece, increasing the clamping force and avoiding falling off during long-term vibration use.
[0013] 3. In the third solution of the clamping mechanism, a second camshaft is used to lock the third fixed base, achieving a short stroke to the locking position and more labor-saving operation. Description of the Drawings
[0014] Figure 1 It is the front view of the wedge-shaped positioning base of the heart fixator of the present utility model;
[0015] Figure 2 Cross-sectional view of the first embodiment of the present utility model;
[0016] Figure 3 Cross-sectional view of the second embodiment of the present utility model;
[0017] Figure 4 Cross-sectional view of the third embodiment of the present utility model.
[0018] Reference numerals: 1, holder body; 2, first fixed base; 21, first spring; 22, first sliding base; 23, swing arm; 24, first camshaft; 3, second fixed base; 31, second sliding base; 32, screw rod; 33, first locking handle; 34, fixing wedge; 35, wedge spring; 4, third fixed base; 41, third sliding base; 42, second camshaft; 43, second locking handle. Specific embodiments
[0019] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0020] Refer to the attached Figure 1 , in Figure 1 , the a direction points to the front view and the b direction points to the right side view. The above views are only for understanding the solution.
[0021] Please refer to Figures 1-4 , the present utility model provides a technical solution:
[0022] Embodiment 1:
[0023] A wedge-shaped positioning base for a heart fixator, comprising a holder body 1, and a clamping mechanism for fixing it at any position is movably clamped to the bottom of the holder body 1.
[0024] The clamping mechanism includes a first fixed base 2, the first fixed base 2 is movably clamped to the bottom of the holder body 1, a horizontal card slot is opened on the inner wall of the bottom of the first fixed base 2, a horizontal card block is movably clamped in the horizontal card slot, a first spring 21 is fixedly installed on the left inner wall of the horizontal card slot, the right end of the first spring 21 is fixedly installed with the horizontal card block, the bottom end of the horizontal card block is fixedly installed with a first sliding base 22, the front end of the first fixed base 2 is rotatably connected with a swing arm 23, the rear end of the swing arm 23 penetrates through the front inner wall of the first fixed base 2 and is fixedly installed with a first camshaft 24, and the first camshaft 24 is located between the first fixed base 2 and the first sliding base 22.
[0025] On the left inner wall of the first sliding base 22, a plastic wedge-shaped rib is fixedly installed, and the bottom of the first fixed base 2 is designed to be inclined.
[0026] The clamping mechanism consists of a first spring 21, a first sliding base 22, a first fixed base 2, a first camshaft 24, and a swing arm 23. Among them, when locking is required, the swing arm 23 is rotated to drive the first camshaft 24, which jacks up the plastic wedge-shaped rib on the first sliding base 22 to contact the inclined surface of the first fixed base 2, achieving the purpose of locking.
[0027] Embodiment 2:
[0028] A wedge-shaped positioning base for a heart fixator includes a fixator body 1, and a clamping mechanism for fixing it at any position is movably clamped at the bottom of the fixator body 1.
[0029] The clamping mechanism includes a second fixed base 3, which is movably clamped at the bottom of the fixator body 1. A second sliding base 31 is movably clamped at the bottom of the second fixed base 3. A circular limiting slot is provided inside the second fixed base 3, and a circular block is movably clamped in the circular limiting slot. A screw rod 32 is embedded at the bottom end of the circular block. A first locking handle 33 is fixedly installed at the right end of the screw rod 32. A fixed wedge block 34 is threadedly connected to the outside of the screw rod 32. A wedge spring 35 is fixedly installed at the left end of the fixed wedge block 34, and the left end of the wedge spring 35 is fixedly installed on the inner wall of the second fixed base 3. The fixed wedge block 34 is located between the second fixed base 3 and the second sliding base 31.
[0030] The fixed wedge block 34 is movably clamped with the right end of the second fixed base 3.
[0031] The clamping mechanism consists of a second sliding base 31, a second fixed base 3, a fixed wedge block 34, a screw rod 32, a first locking handle 33, and a wedge spring 35. By rotating the first locking handle 33, the force is transmitted to the screw rod 32. The screw rod 32 drives the fixed wedge block 34 to move forward. The upper and lower surfaces of the fixed wedge block 34 contact two of the second sliding base 31 and the second fixed base 3, generating friction to lock the sliding clamp at any position. At the same time, the screw rod 32 also generates a pulling force on the second fixed base 3 to achieve clamping with the workpiece.
[0032] Embodiment 3:
[0033] A wedge-shaped positioning base for a heart fixator includes a fixator body 1, and a clamping mechanism for fixing it at any position is movably clamped at the bottom of the fixator body 1.
[0034] The clamping mechanism includes a third fixed base 4, which is movably clamped to the bottom of the fixture body 1. A third sliding base 41 is movably clamped to the bottom of the third fixed base 4. A second camshaft 42 is rotatably connected to the right inner wall of the third fixed base 4. The right end of the second camshaft 42 penetrates through the right side surface of the third fixed base 4 and extends out. One end of the second camshaft 42 extending out of the right side surface of the third fixed base 4 is movably clamped with a second locking handle 43.
[0035] The clamping mechanism is composed of a third sliding base 41, a third fixed base 4, a second camshaft 42, and a second locking handle 43. By rotating the second locking handle 43, the second camshaft 42 rotates until the highest point of the second camshaft 42 contacts the surface of the third sliding base 41, generating frictional force to lock the third sliding base 41 at any position. At the same time, during the locking process, the second camshaft 42 will generate a squeezing force on the third sliding base 41 to achieve clamping of the workpiece.
[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.
Claims
1. A wedge positioning base of a heart fixator, comprising a fixator body (1), characterized in that: A clamping mechanism for fixing the fixing device body (1) at any position is movably clamped at the bottom of the fixing device body (1); The clamping mechanism includes a first fixed base (2), the first fixed base (2) is movably clamped at the bottom of the fixing device body (1), a horizontal card slot is opened on the inner wall of the bottom of the first fixed base (2), a horizontal card block is movably clamped in the horizontal card slot, a first spring (21) is fixedly installed on the left inner wall of the horizontal card slot, the right end of the first spring (21) is fixedly installed with the horizontal card block, the bottom end of the horizontal card block is fixedly installed with a first sliding base (22), the front end of the first fixed base (2) is rotatably connected with a swing arm (23), the rear end of the swing arm (23) penetrates through the front inner wall of the first fixed base (2) and is fixedly installed with a first camshaft (24), and the first camshaft (24) is located between the first fixed base (2) and the first sliding base (22).
2. The wedge positioning base of a heart fixator according to claim 1, characterized in that: A plastic wedge-shaped rib is fixedly installed on the left inner wall of the first sliding base (22), and the bottom of the first fixed base (2) is designed to be inclined.
3. A wedge-shaped positioning base of a heart fixator, comprising a fixator body (1), characterized in that: A clamping mechanism for fixing the fixing device body (1) at any position is movably clamped at the bottom of the fixing device body (1); The clamping mechanism includes a second fixed base (3), the second fixed base (3) is movably clamped at the bottom of the fixing device body (1), a second sliding base (31) is movably clamped at the bottom of the second fixed base (3), a circular limiting card slot is opened inside the second fixed base (3), a circular card block is movably clamped in the circular limiting card slot, a screw rod (32) is embedded at the bottom end of the circular card block, a first locking handle (33) is fixedly installed at the right end of the screw rod (32), a fixed wedge block (34) is threadedly connected to the outside of the screw rod (32), a wedge block spring (35) is fixedly installed at the left end of the fixed wedge block (34), the left end of the wedge block spring (35) is fixedly installed with the inner wall of the second fixed base (3), and the fixed wedge block (34) is located between the second fixed base (3) and the second sliding base (31).
4. A wedge-shaped positioning base of a heart fixator according to claim 3, characterized in that: The fixed wedge block (34) is movably clamped with the right end of the second fixed base (3).
5. A wedge positioning base for a heart fixator, comprising a fixator body (1), characterized in that: A clamping mechanism for fixing the fixing device body (1) at any position is movably clamped at the bottom of the fixing device body (1); The clamping mechanism includes a third fixed base (4), the third fixed base (4) is movably clamped at the bottom of the fixing device body (1), a third sliding base (41) is movably clamped at the bottom of the third fixed base (4), a second camshaft (42) is rotatably connected to the right inner wall of the third fixed base (4), the right end of the second camshaft (42) penetrates through the right side surface of the third fixed base (4) and extends out, and a second locking handle (43) is movably clamped at the end of the second camshaft (42) extending out of the right side surface of the third fixed base (4).