Surgical instrument holder and clamping head thereof

Abstract

The clamping head comprises a fixed clamping piece, a movable clamping piece and a regulation and control assembly, the head end of the fixed clamping piece is concaved inwards to form a fixed clamping groove which is opened in the circumferential direction, the movable clamping piece is connected with the fixed clamping piece in a sliding mode, and the regulation and control assembly is connected with the fixed clamping piece in a sliding mode. The movable clamping piece is further provided with an ejecting and pressing piece used for ejecting and pressing the surgical instrument into the fixed clamping groove. The regulation and control assembly is connected with the fixed clamping piece and used for driving the jacking piece to be close to or away from the fixed clamping groove and making the jacking piece stay at the needed position. According to the utility model, the fixed clamping groove with larger volume is arranged on the fixed clamping piece, and the top pressing piece with smaller volume is used for pressing the surgical instrument in the fixed clamping groove, so that the fixed clamping groove and the top pressing piece respectively form'supporting 'and'top pressing' on the surgical instrument between the fixed clamping groove and the top pressing piece; the clamping in the form has no special requirement on the appearance of the clamped position of the surgical instrument, and not only can the surgical instrument in any shape be clamped, but also the surgical instrument can be ensured to be stably clamped.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to a surgical instrument clamp and a clamping head thereof. Background Art

[0002] Doctors often use a variety of surgical tools when performing surgery, and some surgical tools need to remain fixed at all times or for a certain period of time. In order to keep the surgical tools fixed, an assistant doctor is often needed to assist. However, long-term support of the surgical tools may cause the assistant doctor to shake due to fatigue and other reasons, which in turn brings risks to the surgical process. In order to reduce the risk of surgery and improve the success rate of surgery, it is necessary to add tools dedicated to fixation of some surgical tools.

[0003] The clamping tool used to fix the surgical instrument needs to be easy to install and be able to stably fix itself and the surgical instrument. A large number of clamping tools have emerged in the prior art, such as CN 112754399 A, CN 114027978 A, CN211560410 U, CN 215739443 U, CN 215839553 U, etc. However, the clamping areas provided in the existing clamping tools mostly have regular outer contours, such as the first clamping plate and the second clamping plate in CN 211560410 U respectively provide a clamping surface in the shape of an arc, which results in that when clamping the instrument, they can mostly only be clamped on the relatively regular mechanical surface of the instrument, such as a cylindrical surface or a surface parallel to opposite sides. For surgical instruments with irregular shapes or cylindrical surfaces with an outer diameter smaller than the clamping area, they cannot be clamped stably or cannot be clamped, and the clamping may not be tight or there may be axial rotation during clamping. Summary of the invention

[0004] One object of the utility model is to provide a surgical instrument clamp and a clamping head thereof, wherein the clamping head can adapt to clamping positions of various shapes to ensure stable clamping of the surgical instrument.

[0005] In order to achieve the above utility model purpose, the technical solution of the utility model is as follows:

[0006] A clamping head for a surgical instrument clamp, the clamping head comprising:

[0007] A fixed clamping piece, the head end of which is concave to form a circumferentially open fixed clamping groove;

[0008] A movable clamping member, which is slidably connected to the fixed clamping member, and the movable clamping member is also provided with a pressing member for pressing the surgical instrument into the fixed clamping groove;

[0009] The regulating component is connected to the fixed clamping member and is used to drive the top pressing member to approach or move away from the fixed clamping groove and to make the top pressing member stay at a desired position.

[0010] The utility model provides a fixed clamping groove with a larger volume on the fixed clamping piece, and uses a smaller pressing piece to press the surgical instrument into the fixed clamping groove, so that the fixed clamping groove and the pressing piece respectively form "support" and "pressing" for the surgical instrument located therebetween. This form of clamping has no special requirements on the shape of the clamped position of the surgical instrument. Not only can surgical instruments of any shape (regular or irregular) be clamped, but also it can ensure that the surgical instrument is firmly clamped.

[0011] In one embodiment of the clamping head of the utility model, the fixed clamping groove has a V-shaped, U-shaped or arc-shaped cross section. Obviously, the V-shaped, U-shaped or arc-shaped fixed clamping groove is easier to form a three-point clamping for the surgical instrument together with the top pressure piece, and has higher stability. Of course, when the opening angle of the V-shaped or arc-shaped is greater than or equal to 90°, it has a better clamping effect and space utilization effect.

[0012] In one embodiment of the clamping head of the utility model, the inner wall of the fixed clamping groove is a smooth surface or a rough surface, and the rough surface is provided by protrusions, serrations or grooves formed on the inner wall of the groove. Compared with a smooth surface, a rough surface is more helpful in preventing the clamped surgical instrument from rotating or shifting, and has a better sliding effect.

[0013] In one embodiment of the clamping head of the utility model, the pressing piece is opposite to the bottom of the fixed clamping groove, and a dynamic clamping groove is formed on the pressing piece for preventing the surgical instrument from axial rotation or displacement. The dynamic clamping groove is open in the circumference and has a V-shaped, U-shaped, arc-shaped or sawtooth-shaped cross-section. Of course, when the V-shaped or arc-shaped opening angle of the dynamic clamping groove is greater than or equal to 90°, it has a better clamping effect and space utilization effect. The pressing piece can be fixedly connected to the dynamic clamping piece as a whole, or it can be tightened or clamped on the dynamic clamping piece through a variety of other connection methods, such as snaps, screws, bolts, etc.

[0014] When the top pressure piece and the bottom of the fixed clamping groove are relative to each other, the contact position between the surgical instrument, the top pressure piece and the fixed clamping groove is more likely to form a stable triangular structure or a structure close to an isosceles triangle; after further setting a dynamic clamping groove on the top pressure piece, the surgical instrument can also be further prevented from axial rotation.

[0015] In one embodiment of the clamping head of the utility model, the movable clamping member is C-shaped or U-shaped, the pressing member is integrally formed or detachably connected to the end of the movable clamping member, and the other end of the movable clamping member is slidably connected to the fixed clamping member. In this way, not only the pressing member can participate in the fixation of the surgical instrument, but the movable clamping member can also participate in the fixation of the surgical instrument in some cases.

[0016] In one embodiment of the utility model, the sliding cooperation between the movable clamping member and the fixed clamping member is as follows: an avoidance channel is formed at the tail end of the fixed clamping member, the regulating component includes a screw rod arranged in the avoidance channel and rotatably connected to the fixed clamping member, and a sliding nut cooperating with the screw rod is integrally formed on the movable clamping member; the fixed clamping member is provided with a strip guide groove for facilitating the passage of the movable clamping member and limiting the moving direction of the movable clamping member, as well as a through opening for facilitating the assembly of the sliding nut into the avoidance channel, and the through opening is communicated with the strip guide groove.

[0017] That is, when the screw rotates, the movable clamping part is restricted by the strip guide groove, and the sliding nut can only move along the axial direction of the screw, and then the movable clamping part also moves along the strip guide groove, thereby achieving the purpose of adjusting the distance between the top pressure part and the fixed clamping groove.

[0018] In one embodiment of the clamping head of the utility model, at least one side wall of the strip guide groove is concave to form a guide rail, and the movable clamping member is provided with a guide block that slidably cooperates with the guide rail, or the movable clamping member is provided with a guide rail and the fixed clamping member is provided with a guide block that cooperates with the guide rail.

[0019] Among them, when the width of the movable clamping member and the strip guide groove is equal and the guide rail and the guide block are slidably matched, it can be further ensured that the movable clamping member has a small amount of shaking or almost no shaking in the strip guide groove. Obviously, when guide rails are provided on both opposite side walls of the strip guide groove and guide blocks are provided on both opposite sides of the movable clamping member, the stabilization effect is better. In addition, the guide rails and the guide blocks can also be interchangeably provided, such as the movable clamping member is provided with a guide rail, and the fixed clamping member is provided with a guide block that cooperates with the guide rail, which can also realize this solution.

[0020] In the utility model, the screw rod and the fixed clamping member are rotatably connected in the following manner: the head end of the screw rod is provided with a limit head, the tail end of the screw rod is provided with a limit convex ring, and the outer diameters of the limit head, the screw rod and the limit convex ring are gradually increased;

[0021] The fixed clamping member is provided with a first sunken groove rotatably connected to the limiting head, and a second sunken groove rotatably connected to the limiting convex ring.

[0022] When the screw rod is assembled into the fixed clamping part from the tail end thereof, the limiting heads and limiting convex rings at both ends of the screw rod are respectively placed in the corresponding first recessed groove and second recessed groove, forming limits on both ends of the screw rod (ie, the axial direction).

[0023] In one embodiment of the clamping head of the utility model, the tail end of the screw rod is integrally formed with or detachably fixedly connected with a twisting head for rotating the screw rod, and the outer periphery of the twisting head has anti-slip grooves.

[0024] The utility model provides a method for detachably connecting a twisting head and a screw rod, namely: the tail end of the screw rod is also provided with a connecting sleeve, the outer diameter of which is smaller than the outer diameter of the limiting convex ring; an axial channel is formed on the twisting head, the twisting head sleeve is arranged on the connecting sleeve and abuts against the limiting convex ring;

[0025] The tail end of the connecting sleeve is concavely formed with a connecting groove, and a screw threadedly connected to the connecting groove is passed through the axial channel. The end of the screw is provided with a screwdriver groove for squeezing and twisting the twisting head; of course, the tail end of the screw can also be provided with a nut for squeezing the twisting head, and the twisting head is recessed with a third recessed groove for accommodating the nut. Naturally, the third recessed groove may not be provided on the twisting head, and the nut with an enlarged diameter may not be provided at the end of the screw.

[0026] When the screw is gradually screwed into the connecting groove, the nut gradually squeezes the torsion head so that it only rests on the limiting convex ring, and finally forms a linkage with the screw under the double clamping of the limiting convex ring and the nut.

[0027] The utility model also provides a surgical instrument clamp, which includes a base frame and a universal joint installed on the base frame, and also includes any of the clamping heads described above, wherein the clamping head is connected to the universal joint through the fixed clamping piece. In addition to the beneficial effects of the clamping head, the surgical instrument clamp can also carry the clamping head to perform rotation and orientation adjustment at any required spatial angle.

[0028] Compared with the prior art, the beneficial effects of the utility model are embodied in:

[0029] (1) The utility model provides a fixed clamping groove with a larger volume on the fixed clamping member, and uses a smaller pressing member to press the surgical instrument into the fixed clamping groove. In this way, the fixed clamping groove and the pressing member respectively form a "support" and a "pressing" function for the surgical instrument therebetween. This form of clamping has no special requirements on the shape of the clamped position of the surgical instrument. Not only can surgical instruments of any shape (regular or irregular) be clamped, but it can also ensure that the surgical instrument is firmly clamped. In addition, the clamping accommodating cavities of different sizes (i.e., the opening size of the clamping cavity) formed as the movable clamping member moves can accommodate a variety of clamped instruments of different specifications and shapes.

[0030] (2) In the present invention, the top pressure piece is positioned opposite to the bottom of the fixed clamping groove, so that the contact position between the surgical instrument, the top pressure piece and the fixed clamping groove is easier to form a stable triangular structure; when a dynamic clamping groove is further provided on the top pressure piece, the surgical instrument can be further prevented from axial rotation.

[0031] (3) The dynamic clamping groove formed or arranged on the top pressure member can be set to different materials as needed, such as a rotatable plastic or rigid dynamic clamping groove, which is convenient for adapting to different structural forms during clamping and meeting the clamping requirements of various instruments.

[0032] (4) The dynamic clamping groove at the end of the top pressure member can also be set to other special-shaped structures, such as the dynamic clamping groove can be set at a spatial angle of 90 degrees to the fixed clamping groove.

[0033] (5) The twisting head can also be made of plastic or rigid material depending on the specific situation to facilitate twisting and twisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural schematic diagram of a clamping head for a surgical instrument clamp of the utility model;

[0035] Figure 2 It is a schematic structural diagram of a clamping head for a surgical instrument clamp of the utility model from another viewing angle;

[0036] Figure 3 It is a schematic structural diagram of a clamping head for a surgical instrument clamp of the utility model from another viewing angle;

[0037] Figure 4 for Figure 3 Middle AA section view;

[0038] Figure 5 This is a schematic diagram of the exploded structure of a clamping head for a surgical instrument clamp of the utility model;

[0039] Figure 6 for Figure 5 A schematic diagram of the structure of the central clamping member;

[0040] Figure 7 for Figure 5 A schematic diagram of the structure of the middle moving clamp;

[0041] Figure 8 This is another structural schematic diagram of a clamping head for a surgical instrument clamp of the utility model;

[0042] Fig. 9 This is a schematic diagram of the structure of a surgical instrument holder of the utility model;

[0043] Fig.10This is another structural schematic diagram of a surgical instrument holder of the utility model. DETAILED DESCRIPTION

[0044] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0046] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0047] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "form", and "with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] Example 1

[0049] like Figure 1 , Figure 2 and Figure 3 As shown, the present embodiment is a clamping head for a surgical instrument clamp, comprising a fixed clamping member 1 and a movable clamping member 2. The movable clamping member 2 can move relative to the fixed clamping member 1 under the drive of the regulating component 5, thereby adjusting the spatial size of the clamping area 100 between the fixed clamping member 1 and the movable clamping member 2 to make it compatible with the surgical instrument to be clamped.

[0050] Among them, Figure 2 As shown, the head end of the fixed clamping member 1 is concavely formed with a circumferentially open fixed clamping groove 11, and the fixed clamping groove 11 has a V-shaped, U-shaped or arc-shaped cross-section, preferably in the shape of Figure 1 and Figure 2As shown in the V-shape, the bottom of the V-shaped fixed clamping groove 11 can be sharp or rounded. Obviously, the rounded corners will give the fixed clamping groove 11 greater structural strength and make it easier to plug in the clamping device. In order to make full use of the space in the fixed clamping groove 11, it is better to set the opening angle of the V-shape to be greater than or equal to 90°.

[0051] like Figure 7 Shown, combined Figure 1 and Figure 2 As shown, the movable clamping member 2 is C-shaped, the tail end of the movable clamping member 2 is slidably connected to the fixed clamping member 1, and the head end is detachably mounted with a pressing member 4 by means of screws 3, bolts, etc. The above-mentioned clamping area 100 is defined by the pressing member 4 and the fixed clamping groove 11. When the surgical instrument is placed in the fixed clamping groove 11, the pressing member 4 can be used to press the surgical instrument into the fixed clamping groove 11.

[0052] It can be seen that compared with the fixed clamping groove 11, the volume of the top pressure piece 4 is relatively small, so the top pressure piece 4 and the two groove walls of the V-shaped fixed clamping groove 11 can jointly form a three-point clamp for the surgical instrument, which not only has higher stability, but also has no requirements on the appearance of the surgical instrument and has a wider applicability.

[0053] In order to further improve the clamping stability and prevent the surgical instrument from rotating in the clamping area 100, Figure 4 As shown, in this embodiment, the pressing member 4 is arranged to be opposite to the bottom of the fixed clamping groove 11, so that the contact position between the surgical instrument and the pressing member 4 and the fixed clamping groove 11 is easier to form a stable triangular structure or an approximately isosceles triangular structure; at the same time, a dynamic clamping groove 41 is formed on the pressing member 4 to prevent the surgical instrument from rotating or shifting, and the dynamic clamping groove 41 also has a V-shaped cross-section. In this embodiment, the opening angle of the V-shaped dynamic clamping groove 41 is also preferably greater than or equal to 90°, and is preferably greater than the opening angle of the fixed clamping groove 11, so as to be more conducive to squeezing the surgical instrument toward the bottom of the fixed clamping groove 11.

[0054] exist Fig.10 In the embodiment shown, the clamping groove surface of the dynamic clamping groove 41 is also V-shaped, but the V-shaped cross-section is set at a certain angle with the fixed clamping groove 11, such as the angle can be 90 degrees, etc. When it is necessary to clamp non-axial and other special-shaped structures, the top pressure piece 4 can be rotated at a certain angle to make the utility model more adaptable.

[0055] In this embodiment, the inner walls of the fixed clamping groove 11 and the dynamic clamping groove 41 can be smooth surfaces or rough surfaces, wherein the rough surfaces can be provided by protrusions, serrations or grooves formed on the inner walls of the grooves. Obviously, compared with smooth surfaces, rough surfaces are more helpful in preventing the clamped surgical instrument from rotating and slipping.

[0056] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in this embodiment, the sliding cooperation between the dynamic clamping member 2 and the fixed clamping member 1 is as follows: an axially extending avoidance channel 12 is formed at the tail end of the fixed clamping member 1, and a strip guide groove 13 connected to the avoidance channel 12 is formed on the peripheral wall of the fixed clamping member 1. In this embodiment, the width of the strip guide groove 13 is equivalent to or matches the width of the dynamic clamping member 2 and the two are slidingly cooperated; at the same time, the side walls on both sides of the strip guide groove 13 are concave to form guide rails 14, and the dynamic clamping member 2 is provided with a guide block 21 that slides with the guide rail 14.

[0057] The movable clamping member 2 is slidably matched with the strip guide groove 13, and the guide block 21 is slidably matched with the guide rail 14. The double sliding matching structure enables the movable clamping member 2 to maintain a stable state without shaking during the sliding process relative to the fixed clamping member 1.

[0058] In this embodiment, the movement of the pressing member 4 approaching or moving away from the fixed clamping groove 11 is achieved by the adjusting component 5 driving the movable clamping member 2 to move. Figure 6 and Figure 7 As shown, the regulating component 5 includes a sliding nut 51 (here it can also be understood that the surface has threads) integrally formed with the tail end of the movable clamping member 2, and a through hole 15 connected to the avoidance channel 12 and the strip guide groove 13 is formed on the peripheral wall of the fixed clamping member 1, and the width of the through hole 15 is greater than or equal to the outer diameter of the sliding nut 51, so that the sliding nut 51 can be assembled into the avoidance channel 12 from the through hole 15; a screw rod 52 in the avoidance channel 12 is rotatably connected to the fixed clamping member 1, and the sliding nut 51 is sleeved on the screw rod 52 and threadedly connected to the screw rod 52.

[0059] When the screw rod 52 rotates, the movable clamping part 2 is restricted by the strip guide groove 13, so that the sliding nut 51 can only move axially along the screw rod 52, and then the movable clamping part 2 is also moved along the strip guide groove 13, thereby achieving the purpose of adjusting the distance between the top pressure part 4 and the fixed clamping groove 11.

[0060] like Figure 4 As shown, in this embodiment, the rotational connection mode of the screw rod 52 and the fixed clamping member 1 is: the head end of the screw rod 52 is provided with a limiting head 52a, and the tail end of the screw rod 52 is provided with a limiting convex ring 52b. In this embodiment, the outer diameters of the limiting head 52a, the screw rod 52 and the limiting convex ring 52b gradually increase; and the fixed clamping member 1 is provided with a first recessed groove 16 rotationally connected to the limiting head 52a, and a second recessed groove 17 rotationally connected to the limiting convex ring 52b.

[0061] When the screw rod 52 is assembled into the fixed clamping member 1 from the tail end thereof, the limiting heads 52a and limiting protruding rings 52b at both ends of the screw rod 52 are respectively placed in the corresponding first recessed groove 16 and second recessed groove 17 to limit the two ends of the screw rod 52.

[0062] In order to facilitate the rotation of the screw rod 52, Figure 1 , Figure 8 and Figure 4 It can be seen that the tail end of the screw rod 52 is connected to a twisting head 53 with a larger outer diameter, and an anti-slip pattern 53a is provided on the outer peripheral wall of the twisting head 53.

[0063] In this embodiment, the twisting head 53 can be integrally formed with the screw rod 52, or Figure 4 and Figure 5 As shown, it is detachably fixedly connected to the screw rod 52. A detachable fixed connection method in this embodiment is as follows:

[0064] The tail end of the screw rod 52 is also provided with a connecting sleeve 52c, the outer diameter of which is smaller than the outer diameter of the limiting convex ring 52b (the outer diameter size here is for completing the limiting function, and in other embodiments, it can also be set that the outer diameter of the connecting sleeve 52c is larger than the outer diameter of the limiting convex ring 52b, etc.); an axial channel 53b is formed on the twisting head 53, and the twisting head 53 is sleeved on the connecting sleeve 52c and abuts against the limiting convex ring 52b; the tail end of the connecting sleeve 52c is concavely formed with a connecting groove 52d, and a connecting groove 52d is penetrated in the axial channel 53b. The connecting groove 52d is threadedly connected to the screw rod 54, and the end of the screw rod 54 is provided with a screwdriver groove 54t that can squeeze and twist the twisting head 53. In this embodiment, the tail end of the screw rod 54 is provided with a nut 54a for squeezing the twisting head 53, and the nut 54a is provided with a screwdriver groove 54t that can squeeze and twist the twisting head 53. Due to the provision of the nut 54a, the twisting head 53 is correspondingly provided with a third recessed groove 53c for accommodating the nut 54a, wherein the screwdriver groove 54t can be a transverse groove as shown in the embodiment, and can also be other shapes such as a cross groove, a Pozigzag groove, etc.

[0065] When the screw rod 54 is gradually screwed into the connecting groove 52d, the nut 54a also gradually squeezes the torsion head 53 so that it only rests on the limiting protrusion 52b, and finally forms a linkage with the screw rod 52 under the double clamping of the limiting protrusion 52b and the nut 54a.

[0066] Example 2

[0067] like Fig. 9 As shown, this embodiment is a surgical instrument clamp, which includes a base frame A, a universal joint B installed on the base frame A, and a clamping head connected to the universal joint B. The structure of the clamping head is the same as that of Example 1.

[0068] In this embodiment, the clamping head is connected to the universal joint B through the fixed clamping part 1. To achieve this connection, a connecting channel or a connecting rod can be set on the fixed clamping part 1. Both of these are existing technologies mastered by technical personnel in this field and will not be described in detail in this embodiment.

[0069] The above description is only a preferred embodiment of the utility model, and does not limit the patent protection scope of the utility model. Any equivalent structural transformation made using the contents of the utility model specification and drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the utility model.

Claims

1. A clamping head for a surgical instrument clamp, characterized in that: include: A fixed clamping piece (1), wherein the head end of the fixed clamping piece (1) is concavely formed with a fixed clamping groove (11); A movable clamping member (2), the movable clamping member (2) being slidably connected to the fixed clamping member (1), and the movable clamping member (2) is also provided with a pressing member (4) for pressing the surgical instrument into the fixed clamping groove (11); A regulating component (5) is connected to the fixed clamping member (1) and is used to drive the pressing member (4) to move closer to or farther from the fixed clamping groove (11) and to keep the pressing member (4) at a desired position.

2. The clamping head according to claim 1, characterized in that: The fixed clamping groove (11) has a V-shaped, U-shaped or arc-shaped cross-section.

3. The clamping head according to claim 1, characterized in that: The inner wall of the fixed clamping groove (11) is a smooth surface or a rough surface, and the rough surface is provided by protrusions, serrations or grooves formed on the inner wall of the groove.

4. The clamping head according to claim 1, characterized in that: The pressing piece (4) is located opposite to the bottom of the fixed clamping groove (11), and a dynamic clamping groove (41) is formed on the pressing piece (4) for preventing the surgical instrument from rotating or shifting, and the dynamic clamping groove (41) has a V-shaped, U-shaped, arc-shaped or sawtooth-shaped cross section.

5. The clamping head according to claim 1, characterized in that: The movable clamping member (2) is C-shaped or U-shaped, the pressing member (4) is integrally formed or detachably connected to one end of the movable clamping member (2), and the other end of the movable clamping member (2) is slidably connected to the fixed clamping member (1).

6. The clamping head according to claim 5, characterized in that The rear end of the fixed clamping member (1) is formed with an escape channel (12), the regulating component (5) comprises a screw rod (52) arranged in the escape channel (12) and rotatably connected to the fixed clamping member (1), and the movable clamping member (2) is integrally formed with a sliding nut (51) that cooperates with the screw rod (52); the fixed clamping member (1) is provided with a strip guide groove (13) that facilitates the movable clamping member (2) to pass through and limits the moving direction of the movable clamping member (2), and a through hole (15) that facilitates the assembly of the sliding nut (51) into the escape channel (12), and the through hole (15) is communicated with the strip guide groove (13).

7. The clamping head according to claim 6, characterized in that At least one side wall of the strip-shaped guide groove (13) is concavely formed with a guide rail (14), and the movable clamping member (2) is provided with a guide block (21) that slidably cooperates with the guide rail (14), or the movable clamping member (2) is provided with a guide rail and the fixed clamping member (1) is provided with a guide block that cooperates with the guide rail.

8. The clamping head according to claim 6, characterized in that The head end of the screw rod (52) is provided with a limiting head (52a), and the tail end of the screw rod (52) is provided with a limiting convex ring (52b), and the outer diameters of the limiting head (52a), the screw rod (52) and the limiting convex ring (52b) gradually increase; The fixed clamping member (1) is provided with a first recessed groove (16) rotatably connected to the limiting head (52a), and a second recessed groove (17) rotatably connected to the limiting convex ring (52b).

9. The clamping head according to claim 8, characterized in that The tail end of the screw rod (52) is integrally formed with or detachably fixedly connected to a twisting head (53) for rotating the screw rod (52), and the outer periphery of the twisting head (53) is provided with anti-slip grooves (53a).

10. The clamping head according to claim 9, characterized in that The tail end of the screw rod (52) is also provided with a connecting sleeve (52c), the outer diameter of the connecting sleeve (52c) being smaller than the outer diameter of the limiting convex ring (52b); an axial channel (53b) is formed on the twisting head (53), the twisting head (53) is sleeved on the connecting sleeve (52c) and abuts against the limiting convex ring (52b); The rear end of the connecting sleeve (52c) is concavely formed with a connecting groove (52d), and a screw rod (54) threadedly connected to the connecting groove (52d) is passed through the axial channel (53b), and a screwdriver groove (54t) capable of squeezing and twisting the twisting head is provided at the end of the screw rod (54).

11. A surgical instrument holder, comprising a base frame (A) and a universal joint (B) mounted on the base frame (A), characterized in that: It also comprises a clamping head as described in any one of claims 1 to 10, wherein the clamping head is connected to the universal joint (B) via the fixed clamping member (1).

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