Reference frame quick clamp

Abstract

The invention discloses a reference frame quick clamp, which belongs to the field of medical apparatus and instruments, and comprises a fixed clamping arm provided with two first abutting end faces, an included angle is formed between the two first abutting end faces, and the fixed clamping arm is further provided with a connecting channel in a penetrating manner; the movable clamping arm can be partially and movably arranged in the connecting channel, and the movable clamping arm is provided with a second abutting end face; when the movable clamping arm reciprocates along the central axis of the connecting channel, the second abutting end faces face the first abutting end faces, and the angular bisection faces of the two first abutting end faces are perpendicular to the second abutting end faces all the time. Through the arrangement, when the fixed clamping arm and the movable clamping arm clamp a cylindrical instrument, the first abutting end face and the second abutting end face form three abutting tangent lines on the outer wall of the cylindrical instrument, the three abutting tangent lines are parallel to one another, and the vertical distances between any two abutting tangent lines are the same; various cylindrical instruments with different outer diameters can be rapidly clamped, and the clamped cylindrical instruments are even in stress and not prone to falling off.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a reference frame quick-release clamp. Background Art

[0002] The surgical navigation system is based on medical imaging data such as MRI and CT. It accurately matches the patient's preoperative or intraoperative imaging data with the patient's anatomical structure on the operating table, tracks surgical instruments during surgery, and updates the position of surgical instruments in real time on the patient's image in the form of a virtual probe, allowing doctors to understand the position of the instrument relative to the patient, thereby helping doctors understand whether the movement path of the surgical instrument will cause additional damage to the human body, helping doctors to determine whether the surgical instrument has reached the lesion, making the surgery safer and faster, and greatly reducing the patient's pain during the operation. The hardware part of the surgical navigation system is specifically a reference frame that can be recognized by the image recognition system. The reference frame usually needs to be combined with a cylindrical implantable treatment device to assist the surgical navigation system in locating the treatment device.

[0003] At present, when the reference frame is quickly combined with the cylindrical instrument, a quick-release clamp with a clamp structure is used to connect the cylindrical instrument. The existing clamps are usually provided with flat clamps or clamps with a certain curvature. Among them, the flat clamp has a small contact area with the cylindrical instrument and a large contact position pressure, which is easy to slide relative to the cylindrical instrument when the center of gravity of the quick-release clamp is offset; and although the clamp with a curvature can clamp the cylindrical instrument more firmly, it is not convenient to adapt to a variety of cylindrical instruments with different diameters.

[0004] Therefore, a quick-release clamp is designed that can stably clamp cylindrical instruments of various diameters. The quick-release clamp is specifically a reference frame quick-release clamp. Summary of the invention

[0005] In order to overcome the problems raised in the background technology, the present invention adopts the following technical solutions: A reference frame quick-release clamp comprises: a fixed clamp arm connected to a setting frame with an NDI ball, the fixed clamp arm being provided with two abutting end faces one, the two abutting end faces one having an included angle, and a movable clamp arm being provided with a abutting end face two; the abutting end face two faces the abutting end face one, and the angular bisectors of the two abutting end faces one are always perpendicular to the abutting end face two; when the two abutting end faces one and one abutting end face two are in close contact with the three parallel sides of the cylindrical section of an operating instrument for navigation surgery to be clamped, the operating instrument is fixedly clamped by the three abutting end faces.

[0006] Furthermore, the fixed clamp arm is penetrated by a connecting channel, and the movable clamp arm can be partially moved in the connecting channel. When the part of the moving clamp arm in the connecting channel reciprocates along the axial direction of the connecting channel, the part of the moving clamp arm outside the connecting channel is driven to reciprocate along the axial direction of the connecting channel. The second tightening end face is arranged on the outer wall of the part of the moving clamp arm outside the connecting channel. When the moving clamp arm moves, the second tightening end face is driven to approach or move away from the first tightening end face.

[0007] Furthermore, it also includes a driving bolt, and the movement of the driving bolt part is arranged in the connecting channel; the moving clamp arm is penetrated by a connecting screw hole, and when the moving clamp arm is connected to the connecting channel, the central axis of the connecting screw hole coincides with the central axis of the connecting channel; the part of the driving bolt in the connecting channel is bolt-connected to the connecting screw hole, and when the driving bolt rotates around its own axis, it drives the moving clamp arm to reciprocate along the axial direction of the connecting channel.

[0008] Furthermore, the moving clamp arm includes an arc segment and a vertical segment connected in one piece, the second abutting end face is arranged on the vertical segment, and the connecting screw hole is arranged on the arc segment. The arrangement of the arc segment is equivalent to arranging a reinforcing rib between the connecting screw hole and the second abutting end face, which can effectively improve the structural stability of the second abutting end face and the first abutting end face when clamping a cylindrical instrument, and reduce the stress on the connection between the arc segment and the vertical segment.

[0009] Furthermore, the fixed clamp arm is provided with a limiting groove 1, and the limiting groove 1 is communicated with the connecting channel. The movable clamp arm part extends out from the connecting channel through the limiting groove 1, and the abutting end face 2 is arranged on the part of the movable clamp arm extending out of the connecting channel; the movable clamp arm can move along the axial direction of the connecting channel to a proximal position and abut against the limiting groove 1, and when the movable clamp arm moves to the proximal position, the abutting end face 1 is not in contact with the abutting end face 2.

[0010] Furthermore, a clamping area is formed between the abutting end surface one and the abutting end surface two, and the inner diameter of the clamping area is expanded or reduced when the moving clamp arm reciprocates in the connecting channel; the limiting groove one limits the rotation of the moving clamp arm around the central axis of the connecting channel, so that the moving clamp arm can only reciprocate in the axial direction of the connecting channel.

[0011] Furthermore, a limiting cap is provided at the end of the driving bolt away from the connecting channel, and the outer diameter of the limiting cap is larger than the inner diameter of the connecting channel; the limiting cap is provided with a groove. A limiting boss is provided around the outer wall of the driving bolt, and the outer diameter of the limiting boss is not larger than the inner diameter of the connecting channel; the fixed clamp arm is provided with a pin hole 1, and the pin hole 1 is connected to the connecting channel, and a pin shaft 1 is provided to move in the pin hole 1, and when the pin shaft 1 enters the connecting channel, the axial movement of the driving bolt is limited; the limiting cap does not contact the limiting boss.

[0012] Furthermore, a second pin hole is provided on the fixed clamp arm, the second pin hole is communicated with the connecting channel, and a second pin shaft is provided for movement in the second pin hole; when the second pin shaft enters the connecting channel through the second pin hole, the moving clamp arm is restricted from leaving the connecting channel.

[0013] Furthermore, a second limiting groove is provided on the moving clamp arm, and when the moving clamp arm moves to a far end position in the connecting channel, the second pin abuts against the inner wall of the second limiting groove.

[0014] Furthermore, the fixed clamp arm is provided with a connecting frame, the connecting frame is provided with a positioning screw hole, the number of the positioning screw hole is at least one, and the setting frame with the NDI ball is connected to the connecting frame.

[0015] Furthermore, along the axial direction of the driving bolt, the length of the portion of the driving bolt whose outer diameter is smaller than the inner diameter of the connecting channel is not less than the length of the connecting channel. When the driving bolt rotates and drives the moving clamp arm to disengage from the connecting channel, the axial length of the portion of the driving bolt that is sleeved in the connecting screw hole is greater than zero.

[0016] Beneficial effects of the present invention: By providing a fixed clamp arm with two abutting end faces one and a moving clamp arm with one abutting end face two, and the angular bisectors of the two abutting end faces one are always perpendicular to the abutting end face two, the sum of the pressures on the clamped instrument from the two abutting end faces one and the pressure on the clamped instrument from the abutting end face two are equal and opposite, thereby being able to well maintain the relative stability of the clamped instrument and the quick-release clamp, and preventing the clamped instrument from slipping off between the fixed clamp arm and the moving clamp arm. By providing a connecting channel on the fixed clamp arm, the moving clamp arm can and can only move relative to the fixed clamp arm along the axial direction of the connecting channel, thereby being able to adjust the spacing between the moving clamp arm and the fixed clamp arm, so that the quick-release clamp can clamp cylindrical instruments of various diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 It is a schematic diagram of an assembly structure of the present invention when the moving clamp arm moves to the proximal position; Figure 2 for Figure 1 A schematic diagram of a cross-sectional structure; Figure 3 It is a schematic diagram of an assembly structure of the present invention when the moving clamp arm moves to the far end position; Figure 4 It is a schematic diagram of an explosion structure of the present invention; Figure 5 It is a schematic diagram of the overall structure of the moving clamp arm; Figure 6 A schematic diagram of the overall structure of a fixed clamp arm; Figure 7 for Figure 6 A schematic diagram of a cross-sectional structure; Figure 8 A schematic diagram of the overall structure of a driving bolt; In the figure, 1, fixed clamp arm; 11, tight end face one; 12, connecting channel; 13, limiting groove one; 14, pin hole one; 141, pin shaft one; 15, pin hole two; 151, pin shaft two; 16, connecting frame; 161, positioning screw hole; 2, moving clamp arm; 21, tight end face two; 22, connecting screw hole; 23, limiting groove two; 24, arc section; 25, vertical section; 3, driving bolt; 31, limiting boss; 32, limiting cap; 321, groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below through specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] A reference frame quick-release clamp, such as Figure 1-8As shown, it includes: a fixed clamp arm 1, which is connected to a setting frame with an NDI ball, and the fixed clamp arm 1 is provided with two abutting end faces 11, and the two abutting end faces 11 have an included angle, and the included angle is not less than 30°. A moving clamp arm 2, the moving clamp arm 2 is provided with a butting end face 21; the butting end face 21 faces the butting end face 11, and the angular bisectors of the two butting end faces 11 are always perpendicular to the butting end face 21; when the two butting end faces 11 and a butting end face 21 are in close contact with the three parallel sides of the cylindrical section of the navigation surgery operating instrument to be clamped, the operating instrument is fixedly clamped by the three butting end faces. Because the angular bisectors of the two butting end faces 11 are always perpendicular to the butting end face 21 and pass through the butting end face 21, the outer wall of the cylindrical instrument can maintain a stable posture under the positive pressure of each contact surface when it is clamped by the three butting end faces. Compared with the two parallel clamps in conventional clamps, the clamping end face 11 and the clamping end face 21 are always sections of the same cylindrical surface. Therefore, it can clamp cylindrical instruments through a surrounding multi-point clamping method and limit the radial movement of the clamped instruments.

[0020] In some embodiments of the present application, Figure 1-8 As shown, the fixed clamp arm 1 is penetrated by a connecting channel 12, and the movable clamp arm 2 can be partially moved in the connecting channel 12. When the portion of the movable clamp arm 2 in the connecting channel 12 reciprocates along the axial direction of the connecting channel 12, the portion of the movable clamp arm 2 outside the connecting channel 12 is driven to reciprocate along the axial direction of the connecting channel 12. The second tightening end face 21 is set on the outer wall of the portion of the movable clamp arm 2 outside the connecting channel 12. When the movable clamp arm 2 moves, the second tightening end face 21 is driven to approach or move away from the first tightening end face 11.

[0021] In some embodiments of the present application, Figure 1-8 As shown, it also includes a driving bolt 3, and the movement of part of the driving bolt 3 is arranged in the connecting channel 12; the moving clamp arm 2 is penetrated by a connecting screw hole 22, and when the moving clamp arm 2 is connected to the connecting channel 12, the central axis of the connecting screw hole 22 coincides with the central axis of the connecting channel 12; the part of the driving bolt 3 in the connecting channel 12 is bolted to the connecting screw hole 22, and when the driving bolt 3 rotates around its own axis, it drives the moving clamp arm 2 to reciprocate along the axial direction of the connecting channel 12.

[0022] In some embodiments of the present application, Figure 1-8As shown, the moving clamp arm 2 includes an arc segment 24 and a vertical segment 25 connected in one piece, the second abutting end face 21 is arranged on the vertical segment 25, and the connecting screw hole 22 is arranged on the arc segment 24. The arrangement of the arc segment 24 is equivalent to arranging a reinforcing rib between the connecting screw hole 22 and the second abutting end face 21, which can effectively improve the structural stability of the second abutting end face 21 and the first abutting end face 11 when clamping a cylindrical instrument, and reduce the stress on the connection between the arc segment 24 and the vertical segment 25.

[0023] In some embodiments of the present application, Figure 1-8 As shown, the fixed clamp arm 1 is provided with a limiting groove 13, the limiting groove 13 is connected with the connecting channel 12, the movable clamp arm 2 partially extends out from the connecting channel 12 through the limiting groove 13, and the second tightening end face 21 is arranged on the part of the movable clamp arm 2 extending out of the connecting channel 12; the movable clamp arm 2 can move along the axial direction of the connecting channel 12 to a proximal position and abut against the limiting groove 13, and when the movable clamp arm 2 moves to the proximal position, the first tightening end face 11 is not in contact with the second tightening end face 21.

[0024] In some embodiments of the present application, Figure 1-8 As shown, a clamping area is formed between the tight end surface 11 and the tight end surface 21, and the inner diameter of the clamping area is enlarged or reduced when the moving clamp arm 2 reciprocates in the connecting channel 12; the limiting groove 13 limits the movement of the clamp arm 2 to rotate around the central axis of the connecting channel 12, so that the moving clamp arm 2 can only reciprocate in the axial direction of the connecting channel 12.

[0025] In some embodiments of the present application, Figure 1-8 As shown, a limiting cap 32 is provided at the end of the driving bolt 3 away from the connecting channel 12, and the outer diameter of the limiting cap 32 is larger than the inner diameter of the connecting channel 12; the limiting cap 32 is provided with a groove 321, and the groove 321 is specifically one of a regular hexagonal groove or a cross groove. A limiting boss 31 is arranged around the outer wall of the driving bolt 3, and the outer diameter of the limiting boss 31 is not larger than the inner diameter of the connecting channel 12; the fixed clamp arm 1 is provided with a pin hole 14, the pin hole 14 is connected to the connecting channel 12, and a pin shaft 141 is arranged to move in the pin hole 14, and when the pin shaft 141 enters the connecting channel 12, the axial movement of the driving bolt 3 is limited; the limiting cap 32 is not in contact with the limiting boss 31, and when the limiting cap 32 abuts against the fixed clamp arm 1 at one end of the connecting channel 12, the pin shaft 141 enters the connecting channel 12 and can be stuck between the limiting cap 32 and the limiting boss 31, thereby limiting other movement forms of the driving bolt 3 except the axial rotation around itself. When the driving bolt 3 is in this limited state, the movement of the moving clamp arm 2 in the connecting channel 12 is fully controllable.

[0026] In some embodiments of the present application, Figure 1-8As shown, the fixed clamp arm 1 is provided with a second pin hole 15, which is in communication with the connection channel 12, and a second pin shaft 151 is provided in the second pin hole 15 for movement; when the second pin shaft 151 enters the connection channel 12 through the second pin hole 15, the moving clamp arm 2 is restricted from being separated from the connection channel 12. The moving clamp arm 2 is provided with a second limiting groove 23, and when the moving clamp arm 2 moves to a distal position in the connection channel 12, the second pin shaft 151 abuts against the inner wall of the second limiting groove 23.

[0027] In some embodiments of the present application, Figure 1-8 As shown, the fixed clamp arm 1 is provided with a connecting frame 16, the connecting frame 16 is provided with a positioning screw hole 161, the number of the positioning screw hole 161 is at least one, and the setting frame with the NDI ball is connected to the connecting frame 16. Along the axial direction of the driving bolt 3, the length of the portion where the outer diameter of the driving bolt 3 is smaller than the inner diameter of the connecting channel 12 is not less than the length of the connecting channel 12, and when the driving bolt 3 rotates and drives the moving clamp arm 2 to disengage from the connecting channel 12, the axial length of the portion of the driving bolt 3 sleeved in the connecting screw hole 22 is greater than zero.

Claims

1. A reference frame quick-release clamp, characterized in that: include, A fixed clamp arm is connected to a setting frame with an NDI ball, and the fixed clamp arm is provided with two abutting end faces 1, and the two abutting end faces 1 have an included angle, A moving clamp arm, wherein the moving clamp arm is provided with a second abutting end surface; the second abutting end surface faces the first abutting end surface, and the angular bisectors of the two first abutting end surfaces are always perpendicular to the second abutting end surface; When the two abutting end surfaces 1 and the one abutting end surface 2 are in close contact with the three parallel sides of the columnar section of the navigation surgery operating instrument to be clamped, the operating instrument is fixedly clamped by the three abutting end surfaces.

2. A reference frame quick-release clamp according to claim 1, characterized in that: The fixed clamp arm is provided with a connecting passage running through it, and the movable clamp arm can be partially moved in the connecting passage.

3. A reference frame quick-release clamp according to claim 2, characterized in that: It also includes a driving bolt, and the movement of the driving bolt part is arranged in the connecting channel; the moving clamp arm is penetrated by a connecting screw hole, and when the moving clamp arm is connected to the connecting channel, the central axis of the connecting screw hole coincides with the central axis of the connecting channel; the part of the driving bolt in the connecting channel is bolt-connected to the connecting screw hole, and when the driving bolt rotates around its own axial direction, it drives the moving clamp arm to reciprocate along the axial direction of the connecting channel.

4. A reference frame quick-release clamp according to claim 3, characterized in that: The moving clamp arm comprises an arc section and a vertical section which are integrally connected, the second abutting end surface is arranged on the vertical section, and the connecting screw hole is arranged on the arc section.

5. A reference frame quick-release clamp according to claim 4, characterized in that: The fixed clamp arm is provided with a limiting groove 1, and the limiting groove 1 is connected with the connecting channel, and the moving clamp arm part extends out from the connecting channel through the limiting groove 1, and the tightening end face 2 is arranged on the part of the moving clamp arm extending out of the connecting channel; the moving clamp arm can move to a proximal position along the axial direction of the connecting channel and tighten against the limiting groove 1, and when the moving clamp arm moves to the proximal position, the tightening end face 1 is not in contact with the tightening end face 2, and a clamping area is formed between the tightening end face 1 and the tightening end face 2, and the inner diameter of the clamping area is enlarged or reduced when the moving clamp arm reciprocates in the connecting channel; the limiting groove 1 limits the rotation of the moving clamp arm around the central axis of the connecting channel, so that the moving clamp arm can only reciprocate in the axial direction of the connecting channel.

6. The reference frame quick-release clamp according to claim 3, characterized in that: A limiting cap is provided at the end of the driving bolt away from the connecting channel, and the outer diameter of the limiting cap is larger than the inner diameter of the connecting channel; the limiting cap is provided with a groove; a limiting boss is arranged around the outer wall of the driving bolt, and the outer diameter of the limiting boss is not larger than the inner diameter of the connecting channel; the fixed clamp arm is provided with a pin hole 1, and the pin hole 1 is connected to the connecting channel, and a pin shaft 1 is provided to move in the pin hole 1, and when the pin shaft 1 enters the connecting channel, the axial movement of the driving bolt is limited; the limiting cap does not contact the limiting boss.

7. The reference frame quick-release clamp according to claim 3, characterized in that: The fixed clamp arm is provided with a second pin hole, the second pin hole is communicated with the connecting channel, and a second pin shaft is provided in the second pin hole for movement; when the second pin shaft enters the connecting channel through the second pin hole, the moving clamp arm is restricted from leaving the connecting channel.

8. The reference frame quick-release clamp according to claim 7, characterized in that: The moving clamp arm is provided with a second limiting groove. When the moving clamp arm moves to a distal position in the connecting channel, the second pin abuts against the inner wall of the second limiting groove.

9. The reference frame quick-release clamp according to claim 1, characterized in that: The fixed clamp arm is provided with a connecting frame, the connecting frame is provided with a positioning screw hole, the number of the positioning screw hole is at least one, and the setting frame with the NDI ball is connected to the connecting frame.

10. The reference frame quick-release clamp according to claim 3, characterized in that: Along the axial direction of the driving bolt, the length of the portion of the driving bolt whose outer diameter is smaller than the inner diameter of the connecting channel is not less than the length of the connecting channel. When the driving bolt rotates and drives the moving clamp arm to disengage from the connecting channel, the axial length of the portion of the driving bolt that is sleeved in the connecting screw hole is greater than zero.

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