Head fixing device

Abstract

The head fixing device is used for animal brain surgery and comprises two ear rods, each ear rod comprises a rod piece and a positioning piece, each positioning piece is connected to one end of the corresponding rod piece, and each positioning piece is provided with a concave part which is concave in the direction where the corresponding rod piece is located; the two ear rods are arranged in the left-right direction of the head of the animal, the positioning pieces of the two ear rods are oppositely arranged, and the openings of the two concave parts are oppositely arranged; the two concave parts are used for clamping the left side and the right side of the head of the animal. The head fixing device is used for an animal brain operation, the head of an animal can be well fixed under the condition that no extra harm is caused to the animal, and the accuracy of the brain operation can be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of neurobiological experimental devices, and in particular to a head fixing device for animal brain surgery. Background Art

[0002] In current neuroscience research, when performing brain surgery on animals, an incisor clamp and two ear bars are usually used to fix the animal's head. The incisor clamp is used to fix the upper jaw of small animals, and the two ear bars are inserted and pressed against the two ear canals or the left and right sides of the head of the animal, forming a three-point fixation of the animal's head. In applications, the animals used in experiments are mostly small animals such as mice, rabbits, and monkeys.

[0003] In a related technology, the end of the ear rod used for fixing with the animal's head is designed as a conical angle structure. When the structure is set to fix the animal's head, it is easy to cause additional damage to the animal and may affect the experimental results.

[0004] In view of this, how to improve the head fixation device used for animal brain surgery to achieve reliable fixation of the animal's head without causing additional harm to the animal is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The purpose of the present application is to provide a head fixation device, which is used for animal brain surgery and can better fix the animal's head without causing additional harm to the animal, thereby helping to ensure the accuracy of brain surgery.

[0006] In order to solve the above technical problems, the present application provides a head fixing device for animal brain surgery, comprising two ear bars, wherein the ear bars comprise a rod and a positioning member, wherein the positioning member is connected to one end of the rod, and the positioning member has a concave portion that is concave toward the direction where the rod is located;

[0007] The two ear bars are arranged along the left and right directions of the animal's head, the positioning members of the two ear bars are arranged facing each other, and the openings of the two concave parts are facing each other; the two concave parts are used to clamp the left and right sides of the animal's head.

[0008] In a feasible solution, the positioning member includes at least two positioning parts, each of which has a positioning surface part, and the area between the positioning surface parts forms the concave part.

[0009] In one feasible solution, the at least two positioning portions include a first positioning portion and a second positioning portion, the first positioning portion is located above the second positioning portion, and the positioning surface portion of the first positioning portion and the positioning surface portion of the second positioning portion are arranged at a set angle.

[0010] In one feasible solution, the at least two positioning parts further include a third positioning part and a fourth positioning part, the third positioning part is in front of the fourth positioning part, and the positioning surface part of the third positioning part and the positioning surface part of the fourth positioning part are arranged at a set angle.

[0011] In a feasible solution, the positioning surface portion is one of a convex cylindrical surface, a concave cylindrical surface and a plane, and the surface shapes of the positioning surface portions are differently set; or at least some of the positioning surface portions are the same.

[0012] In a feasible solution, the concave portion of the positioning member is a concave arc surface or a concave spherical surface.

[0013] In a feasible solution, the positioning member is fixedly connected to the rod member.

[0014] In a feasible solution, the positioning member is movably connected to the rod member, and the ear rod further includes a locking component, and the locking component is used to limit the relative position between the positioning member and the rod member.

[0015] In one feasible solution, the positioning member is pivotally connected to the rod, and the pivot axis of the positioning member is parallel to the horizontal direction and extends in the front-to-back direction; or, the positioning member is pivotally connected to the rod, and the pivot axis of the positioning member is the central axis of the rod; or, the positioning member is ball-jointed to the rod.

[0016] In a feasible solution, the head fixation device also includes a surgical platform, which includes two second mounting platforms, each of which has a mounting groove for supporting the rod, and the rod can move along the mounting groove to adjust the distance between the two positioning members; the ear rod also includes a rod locking member, which is used to limit the relative position between the rod and the second mounting platform.

[0017] The head fixing device provided by the present application has improved its ear rod structure, and the concave portion of the positioning piece of the ear rod is pressed against the side area of ​​the animal's head, and the positioning pieces of the two ear rods achieve positioning of the head by clamping the left and right sides of the head. Compared with the existing technology, the ear rod does not need to be inserted into the ear canal of the animal, which saves time in finding the ear canal for fixation and avoids damage to the animal's ear canal; at the same time, the positioning piece contacts the head through the concave portion, has a better fit with the head, and has a larger contact area, which can provide a more stable fixation for the animal's head, thereby helping to ensure the accuracy of brain surgery performed on the animal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A schematic diagram of the structure of a head fixing device provided in an embodiment of the present application;

[0019] Figure 2 This is a schematic structural diagram of the first embodiment of the ear rod provided in this application;

[0020] Figure 3 For two Figure 2 The schematic diagram of the projection of the ear rod in the plane where the reference plane is located is shown;

[0021] Figure 4 This is a schematic structural diagram of a second embodiment of the ear rod provided in this application;

[0022] Figure 5 This is a schematic structural diagram of a third embodiment of the ear rod provided in this application;

[0023] Figure 6 for Figure 5 Schematic diagram of the projection of the ear rod in the horizontal plane;

[0024] Figure 7 This is a schematic structural diagram of a fourth embodiment of the ear rod provided in the present application;

[0025] Figure 8 for Figure 7 A schematic vertical cross-sectional view of the ear rod at the center of the concave portion;

[0026] Fig. 9 for Figure 7 A schematic horizontal cross-sectional view of the ear rod at the center of the concave portion;

[0027] Fig.10 This is a schematic structural diagram of a fifth embodiment of the ear rod provided in the present application;

[0028] Fig.11 This is a schematic structural diagram of a sixth embodiment of the ear rod provided in the present application;

[0029] Fig.12 This is a schematic structural diagram of the seventh embodiment of the ear rod provided in the present application.

[0030] Description of reference numerals:

[0031] A surgical platform 10, a base plate 11, a first mounting platform 12, and a second mounting platform 13;

[0032] An incisor clamp assembly 20, an incisor clamp connecting rod 21, an incisor clamp body 22, and an incisor clamp locking member 23;

[0033] Ear rod 30, rod 31, rod locking member 311, positioning member 32, concave portion 32a, first positioning portion 321, first positioning surface 3211, second positioning portion 322, second positioning surface 3221, third positioning portion 323, third positioning surface 3231, fourth positioning portion 324, fourth positioning surface 3241, fifth positioning portion 325, concave surface 3251, positioning base 326, reference surface 3261;

[0034] The first connecting plate 331 , the second connecting plate 332 , the pivot shaft 333 , the first locking component 334 ; the first connecting cylinder 341 , the second connecting cylinder 342 , the intermediate connecting component 343 , the second locking component 344 ; the first connecting rod 351 , the first connecting sleeve 352 , the third locking component 354 . DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] The head fixation device provided in the embodiment of the present application is used for animal brain surgery, and the head fixation device is used to fix the head of the animal to facilitate brain surgery on the animal. For example, the animal can be a relatively small animal such as a mouse, a rabbit or a monkey.

[0037] The directional words left, right, front, back, top and bottom involved in this article are defined based on the head of the animal. The use of the directional words is only for the convenience of understanding and description and does not constitute a limitation on the scope of protection.

[0038] Please refer to Figure 1 , Figure 1 This is a schematic structural diagram of a head fixing device in an embodiment provided in the present application.

[0039] In this embodiment, the head fixing device for animal brain surgery includes a surgical platform 10 , an incisor clamp assembly 20 and two ear rods 30 , and the incisor clamp assembly 20 and the two ear rods 30 are both mounted on the surgical platform 10 .

[0040] The incisor clamp assembly 20 is located in front of the two ear bars 30. The incisor clamp assembly 20 is used to fix the upper jaw of the animal to be operated on. The two ear bars 30 respectively press against the left and right sides of the animal's head to clamp the animal's head. The incisor clamp assembly 20 and the two ear bars 30 form a three-point fixation for the animal's head, so as to facilitate brain surgery on the animal.

[0041] In one embodiment, the surgical platform 10 includes a base plate 11 and a first mounting platform 12 fixed on the base plate 11 , and the first mounting platform 12 is used to carry and position the incisor clamp assembly 20 .

[0042] The incisor clamp assembly 20 includes an incisor clamp connecting rod 21 and an incisor clamp body 22 arranged at one end of the incisor clamp connecting rod 21. The incisor clamp body 22 is specifically used to fix the upper jaw of the animal. Obviously, the incisor clamp body 22 is installed at the rear end of the incisor clamp connecting rod 21, that is, the end facing the side where the ear rod 30 is located.

[0043] The first mounting platform 12 has a mounting groove, and the incisor clamp assembly 20 can be installed in the mounting groove of the first mounting platform 12 through its incisor clamp connecting rod 21. The incisor clamp connecting rod 21 can move in the front-to-back direction relative to the mounting groove to adjust the distance between the incisor clamp body 22 and the two ear rods 30 in the front-to-back direction, so as to adapt to animal heads of different sizes.

[0044] The incisor clamp assembly 20 also includes an incisor clamp locking piece 23. After adjusting the position of the incisor clamp assembly 20 in the front-to-back direction, the relative position of the incisor clamp assembly 20 and the first mounting platform 12 is limited by the incisor clamp locking piece 23 to ensure that the incisor clamp assembly 20 will not shift, thereby ensuring the fixing effect on the animal's head.

[0045] Exemplarily, the incisor clamp locking member 23 can be a screw or a bolt with a threaded structure, etc. The incisor clamp locking member 23 can be screwed into the threaded hole set on the first mounting platform 12 and abut against the incisor clamp connecting rod 21, thereby fixing the position of the incisor clamp connecting rod 21.

[0046] The specific structure of the incisor clamp body 22 of the incisor clamp assembly 20 can be realized by referring to the existing technology, and is not the invention point of the present application and will not be described in detail here.

[0047] The present application focuses on improving the structure of the ear rod 30 , and the specific structure of the ear rod 30 is described in detail below.

[0048] In this embodiment, the ear rod 30 includes a rod 31 and a positioning member 32. The positioning member 32 is connected to one end of the rod 31. The positioning member 32 has a concave portion 32a that is concave toward the direction of the rod 31. The two ear rods 30 of the head fixing device are arranged along the left and right directions of the animal's head. The positioning members 32 of the two ear rods 30 are arranged facing each other, and the openings of the two concave portions 32a face each other. The two concave portions 32a are used to clamp the left and right sides of the animal's head.

[0049] It should be noted that the concave direction of the concave portion 32a is for the rod 31 and the positioning member 32 of the same ear rod 30. For the left ear rod 30, the opening of the concave portion 32a faces right and the concave direction faces left; for the right ear rod 30, the opening of the concave portion 32a faces left and the concave direction faces right.

[0050] After the head fixing device adopts the above-mentioned ear rod 30, the concave portion 32a of the positioning piece 32 of the ear rod 30 is pressed against the side area of ​​the animal's head, and the positioning pieces 32 of the two ear rods 30 realize the positioning of the head by clamping the left and right sides of the head. Compared with the existing technology, the ear rod 30 does not need to be inserted into the ear canal of the animal, which saves the time of finding the ear canal for fixation and avoids damage to the animal's ear canal; at the same time, the positioning piece 32 contacts the head through the concave portion 32a, has a good fit with the head, and has a large contact area, which can provide a more stable fixation for the animal's head, thereby helping to ensure the accuracy of brain surgery performed on the animal.

[0051] In practical applications, the concave portion 32a of the positioning member 32 of the ear rod 30 can have a variety of structural forms, and the shape and size of the concave portion 32a can be set according to the skull curve of the animal so that the concave portion 32a fits better with the animal's head.

[0052] In an achievable solution, the positioning member 32 includes at least two positioning parts, each of which has a positioning face, and the area between each positioning face forms a concave portion 32a. When the positioning member 32 abuts against the animal's head, at least part of the positioning face of its positioning part can contact the head.

[0053] Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic structural diagram of the first embodiment of the ear rod provided in this application. Figure 3 For two Figure 2 Schematic diagram of the projection of the ear rod in the reference plane.

[0054] exist Figure 2 and Figure 3 In the illustrated embodiment, the positioning member 32 of the ear rod 30 includes two positioning portions, namely a first positioning portion 321 and a second positioning portion 322, wherein the first positioning portion 321 is located above the second positioning portion 322, the first positioning portion 321 has a first positioning surface portion 3211, the second positioning portion 322 has a second positioning surface portion 3221, the first positioning surface portion 3211 and the second positioning surface portion 3221 are arranged at a set angle, and the area between the first positioning surface portion 3211 and the second positioning surface portion 3221 forms a concave portion 32a.

[0055] It can be understood that the first positioning surface portion 3211 faces the second positioning surface portion 3221 , and the second positioning surface portion 3221 faces the first positioning surface portion 3211 .

[0056] It can also be understood that a concave portion 32 a can be formed between the first positioning surface portion 3211 and the second positioning surface portion 3221 , the first positioning surface portion 3211 is tilted upward as a whole, and the second positioning surface portion 3221 is tilted downward as a whole.

[0057] After being configured as above, when the positioning member 32 contacts the side of the animal's head, the first positioning surface portion 3211 and the second positioning surface portion 3221 can clamp one side of the animal's head, which is beneficial to improving the reliability and stability of fixing the animal's head.

[0058] In the specific configuration, the positioning member 32 includes a positioning base 326 , and the positioning member 32 is connected to the rod 31 via the positioning base 326 . Obviously, the first positioning portion 321 and the second positioning portion 322 are arranged on a side of the positioning base 326 facing away from the rod 31 .

[0059] In this embodiment, the positioning member 32 of the ear rod 30 is fixedly connected to the rod member 31 , and the extending direction of the rod member 31 is a horizontal direction parallel to the left-right direction.

[0060] The positioning base 326 has two reference surfaces 3261 , which are arranged in parallel along a horizontal direction, and at least parts of the first positioning portion 321 and the second positioning portion 322 are disposed between the two reference surfaces 3261 .

[0061] On the basis of the fixed connection between the positioning member 32 and the rod member 31, the reference plane 3261 is a vertical plane and is parallel to the extension direction of the rod member 31; when the head fixing device is in use, it can be considered that the reference plane 3261 is parallel to the coronal section of the animal's head.

[0062] like Figure 3 As shown, the projections of the first positioning surface portion 3211 and the second positioning surface portion 3221 in the plane where the reference surface 3261 is located are line segment a1 and line segment a2 respectively, and an angle α is formed between the two.

[0063] The lengths of line segments a1 and a2 and the setting of the angle α are related to the skull curve of the animal's head. In application, the setting can be comprehensively considered according to actual needs such as the type of animal to be operated on.

[0064] Exemplarily, the lengths of line segment a1 and line segment a2 range from 3 to 30 mm.

[0065] Exemplarily, the angle α ranges from 10° to 170°. Specifically, the angle α may be 30°, 45°, 60°, 90°, 135°, etc.

[0066] The lengths of line segment a1 and line segment a2 may be set to be the same or different.

[0067] Figure 2 In the embodiment shown, the first positioning surface 3211 of the first positioning portion 321 and the second positioning surface 3221 of the second positioning portion 322 are both convex cylindrical surfaces. When specifically configured, the axis of the convex cylindrical surface is parallel to the reference surface 3261, that is, parallel to the coronal section of the animal's head.

[0068] The first positioning surface 3211 and the second positioning surface 3221 are Figure 2 In addition to the convex cylinder shown, other surface shapes can also be used. The surface shape here refers to the type of surface, and the type of surface can be a plane, a curved surface, etc.

[0069] like Figure 4 A second embodiment of the ear rod 30 is shown. In this embodiment, the positioning member 32 of the ear rod 30 is also provided with a first positioning portion 321 and a second positioning portion 322. The first positioning portion 321 is also located above the second positioning portion 322. The area between the first positioning surface portion 3211 of the first positioning portion 321 and the second positioning surface portion 3221 of the second positioning portion 322 forms a concave portion 32a.

[0070] and Figure 2 The ear stem 30 shown is distinguished in that Figure 4 In the ear rod 30 shown, the first positioning surface portion 3211 and the second positioning surface portion 3221 of the positioning member 32 are both concave cylindrical surfaces.

[0071] Figure 4 The projection of the ear rod 30 shown on the plane where the reference plane 3261 is located can still be referred to Figure 3 It is understood that the length size setting of the projection line segment of the first positioning surface 3211 and the projection line segment of the second positioning surface 3221, as well as the angle setting of the two projection line segments can refer to the aforementioned Figure 2 The description of the illustrated embodiments is understood and will not be repeated here.

[0072] In other embodiments, the first positioning surface 3211 and the second positioning surface 3221 may also be planes; when set as planes, the first positioning surface 3211 and the second positioning surface 3221 may be arranged perpendicular to the reference plane 3261, that is, perpendicular to the coronal section of the animal's head.

[0073] In other embodiments, the surface shapes of the first positioning surface portion 3211 and the second positioning surface portion 3221 may be differently set. For example, one of the first positioning surface portion 3211 and the second positioning surface portion 3221 may be a convex cylindrical surface, and the other may be a plane or a concave cylindrical surface.

[0074] In other embodiments, when the first positioning surface portion 3211 or the second positioning surface portion 3221 is a curved surface, it may not be a cylindrical surface, but may be other convex curved surfaces or concave curved surfaces.

[0075] Figure 2 and Figure 4 In the illustrated embodiment, the positioning member 32 of the ear rod 30 is provided with two positioning portions. In other embodiments, the positioning member 32 of the ear rod 30 may also be provided with more than three positioning portions.

[0076] For example Figure 5 and Figure 6 The ear stem 30 of the third embodiment is shown. Figure 5 and Figure 6 The ear rod 30 shown is an ear rod arranged on the right side, and the positioning member 32 of the ear rod 30 is provided with four positioning parts, namely the first positioning part 321, the second positioning part 322, the third positioning part 323 and the fourth positioning part 324, wherein the first positioning part 321 and the second positioning part 322 are arranged in the up and down directions, and the first positioning part 321 is located above the second positioning part 322, and the third positioning part 323 and the fourth positioning part 324 are arranged in the front and back directions, and the third positioning part 323 is located on the front side of the fourth positioning part 324. The first positioning portion 321 and the second positioning portion 322 are arranged at a set angle, and the third positioning portion 323 and the fourth positioning portion 324 are arranged at a set angle. A concave area is enclosed among the first positioning portion 321, the second positioning portion 322, the third positioning portion 323 and the fourth positioning portion 324. The first positioning portion 321 has a first positioning surface portion 3211 facing the concave area, the second positioning portion 322 has a second positioning surface portion 3221 facing the concave area, the third positioning portion 323 has a third positioning surface portion 3231 facing the concave area, and the fourth positioning portion 324 has a fourth positioning surface portion 3241 facing the concave area. The first positioning surface portion 3211, the second positioning surface portion 3221, the third positioning surface portion 3231 and the fourth positioning surface portion 3241 enclose a concave portion 32a.

[0077] The ear rod 30 forms a concave portion 32a through four positioning surface portions. When abutting against the side of the animal's head, the contact area is large, which is beneficial to improving the stability of the two ear rods 30 in clamping the head.

[0078] In the illustrated example, the first positioning surface portion 3211 , the second positioning surface portion 3221 , the third positioning surface portion 3231 , and the fourth positioning surface portion 3241 are all convex cylindrical surfaces.

[0079] like Figure 6 As shown, the projections of the third positioning surface portion 3231 and the fourth positioning surface portion 3241 in the horizontal plane are line segment b1 and line segment b2 respectively, and an angle β is formed between the two.

[0080] The length of the line segment b1 and the line segment b2 and the setting of the angle β are related to the skull curve of the animal's head. In application, the setting can be comprehensively considered according to the actual needs such as the type of animal to be operated on.

[0081] Exemplarily, the lengths of line segment a1 and line segment a2 range from 3 to 30 mm.

[0082] Exemplarily, the angle β ranges from 10° to 170°. Specifically, the angle β can be 30°, 45°, 60°, 90°, 135°, etc.

[0083] Figure 5 In the embodiment shown, the relevant parameter settings of the projections of the first positioning surface 3211 and the second positioning surface 3221 in the plane where the reference surface 3261 is located can refer to the aforementioned Figure 2 and Figure 3 The description and settings of the illustrated embodiment will not be repeated here.

[0084] In other implementations, the surface shapes of the aforementioned four positioning surface portions may also be a concave cylinder or a plane, or a combination of a convex cylinder and a concave cylinder, or a combination of a convex cylinder and a plane, or a combination of a concave cylinder and a plane.

[0085] In a specific implementation, when the third positioning surface portion 3231 and the fourth positioning surface portion 3241 are convex cylinders or concave cylinders, the cylinder axes thereof can be set to be parallel to the horizontal plane; when the third positioning surface portion 3231 and the fourth positioning surface portion 3241 are planes, the planes can be set perpendicular to the horizontal plane.

[0086] The number and arrangement of the positioning parts of the positioning member 32 can be variously designed according to actual needs, not limited to those shown in the above figures, and will not be listed here. In summary, it can be understood that the positioning parts of the positioning member 32 form a claw-like structure that can clamp or better support the left and right sides of the head.

[0087] The concave portion 32a of the positioning member 32 of the ear stem 30 may have other structural forms besides being formed by the positioning surfaces of more than two positioning portions as mentioned above.

[0088] Please refer to Figures 7 to 9 , Figure 7 This is a schematic structural diagram of a fourth embodiment of the ear rod provided in this application. Figure 8 for Figure 7 The vertical cross-sectional view of the ear rod at the center of the concave portion is shown in FIG. Fig. 9 for Figure 7 A schematic horizontal cross-sectional view of the ear rod at the center of the concave portion.

[0089] In this embodiment, the positioning member 32 of the ear rod 30 includes a fifth positioning portion 325, and the fifth positioning portion 325 has a groove structure that is recessed toward the direction of the rod member 31. The groove structure forms a concave portion 32a, and the concave portion 32a is specifically a circumferentially continuous concave surface. The concave surface can be a concave arc surface or a concave spherical surface. Of course, it can also be other concave curved surfaces.

[0090] In this embodiment, the fifth positioning portion 325 of the positioning member 32 can still be fixedly connected to the rod 31 through the positioning base 326 .

[0091] like Figure 8 As shown, in the vertical section at the center of the concave portion 32a, the concave portion 32a has a concave curve c1 with an opening toward the animal's head side; Fig. 9 As shown, in the horizontal section at the center of the concave portion 32a, the concave portion 32a has a concave curve c2 with an opening toward the animal's head. In actual setting, the shape of the concave portion 32a can be determined according to the specific curve forms of the concave curve c1 and the concave curve c2, with the design principle of being able to stably fix the animal's head.

[0092] use Figures 7 to 9 After the solution shown, the positioning member 32 can abut against the side area of ​​the animal's head through the open end of the fifth positioning portion 325, and the concave portion 32a forms a larger contact surface with the side area, thereby achieving better and more stable fixation of the animal's head.

[0093] In the aforementioned embodiments, the positioning member 32 and the rod 31 of the ear rod 30 are both fixedly connected. In other embodiments, the positioning member 32 and the rod 31 in the aforementioned embodiments can also be flexibly connected so that the positioning member 32 can have a movable space relative to the rod 31. When fixing the head of an animal, the relative position of the positioning member 32 and the animal's head can be adjusted according to different animal heads, so that the concave portion 32a of the positioning member 32 can better fit the animal's skull to improve the fixing effect. Of course, on the basis of the flexibly connected positioning member 32 and the rod 31, the ear rod 30 also includes a locking component. When the positioning member 32 is adjusted to a good position, the relative position between the positioning member 32 and the rod 31 is locked or limited by the locking component.

[0094] There are many ways to flexibly connect the positioning member 32 and the rod member 31, which are described below with reference to the accompanying drawings.

[0095] Please refer to Fig.10 , Fig.10 This is a schematic structural diagram of the fifth embodiment of the ear rod provided in this application.

[0096] In this embodiment, the positioning member 32 is pivotally connected to the rod member 31 , and the pivot axis of the positioning member 32 is parallel to the horizontal direction and extends along the front-to-back direction, or in other words, the pivot axis of the positioning member 32 is perpendicular to the extension direction of the rod member 31 .

[0097] In a specific implementation, the first connecting plate 331 is fixedly connected to the side of the positioning member 32 facing the rod 31, and two second connecting plates 332 arranged in parallel are provided at one end of the rod 31 connected to the positioning member 32. Both the first connecting plate 331 and the second connecting plate 332 have through holes. The first connecting plate 331 of the positioning member 32 is inserted between the two second connecting plates 332, and the positions of the through holes of the three correspond. The positioning member 32 is pivotally connected to the rod 31 by inserting the pivot shaft 333 of the first connecting plate 331 and the two second connecting plates 332. In this way, the positioning member 32 can rotate upward or downward around the pivot shaft 333. When fixing the head of an animal, the concave portion 32a of the positioning member 32 can be better fitted with the head of the animal by adjusting the rotation angle of the positioning member 32.

[0098] In a specific implementation, the relative position between the positioning member 32 and the rod 31 is limited by the first locking member 334. The first locking member 334 can be a screw or a screw with a threaded structure, or a jackscrew, etc. A locking hole that matches the first locking member 334 is provided on a second connecting plate 332. The first locking member 334 can be screwed into the locking hole and abut against the first connecting plate 331, so that the first connecting plate 331 cannot rotate, thereby limiting the relative position between the positioning member 32 and the rod 31.

[0099] Exemplarily, the rotation angle of the positioning member 32 around the pivot axis 333 may be in the range of -30° to 30°. According to actual needs, the rotation angle range of the positioning member 32 may also be set to other values.

[0100] Please refer to Fig.11 , Fig.11 This is a schematic structural diagram of the sixth embodiment of the ear rod provided in the present application.

[0101] In this embodiment, the positioning member 32 is connected to the rod member 31 by a ball joint, so that the positioning member 32 can perform universal rotation relative to the rod member 31, and the angle adjustment range of the positioning member 32 is wider.

[0102] In a specific implementation, the first connecting cylinder 341 is fixedly connected to one end of the positioning member 32 facing the rod 31, and the second connecting cylinder 342 is fixedly connected to one end of the rod 31 facing the positioning member 32. The first connecting cylinder 341 and the second connecting cylinder 342 are connected by a ball joint through an intermediate connecting member 343. Specifically, the two ends of the intermediate connecting member 343 are spherical structures, and the spherical structures at the two ends of the intermediate connecting member 343 are respectively inserted into the first connecting cylinder 341 and the second connecting cylinder 342. The first connecting cylinder 341 of the positioning member 32 can perform universal rotation around the center of the spherical structure of the intermediate connecting member 343 that matches therewith, and the second connecting cylinder 342 of the rod 31 can also perform universal rotation around the center of the spherical structure of the intermediate connecting member 343 that matches therewith.

[0103] In a specific implementation, after the relative positions of the positioning member 32 and the rod member 31 are adjusted, the relative positions of the positioning member 32 and the rod member 31 are locked by the second locking member 344 to ensure the stability of the positioning member 32 in fixing the animal's head.

[0104] Specifically, the first connecting cylinder member 341 and the second connecting cylinder member 342 have a notch extending axially on the circumference; the second locking component 344 includes two clamping members and matching fasteners, the clamping member is an annular structure with an opening, when locking, the two clamping members are respectively sleeved on the outside of the first connecting cylinder member 341 and the second connecting cylinder member 342, and the openings of the clamping members are locked with fasteners, and the radial size of the first connecting cylinder member 341 or the second connecting cylinder member 342 is reduced by the locking force, one of the clamping members locks the spherical structure of the first connecting cylinder member 341 and the intermediate connecting member 343, and the other clamping member locks the spherical structure of the second connecting cylinder member 342 and the intermediate connecting member 343, thereby locking the relative position of the positioning member 32 and the rod member 31, so that the positioning member 32 and the rod member 31 cannot move relative to each other.

[0105] Please refer to Fig.12 , Fig.12 This is a schematic structural diagram of the seventh embodiment of the ear rod provided in the present application.

[0106] In this embodiment, the positioning member 32 is pivotally connected to the rod member 31 , and the pivot axis of the positioning member 32 is the central axis of the rod member 31 .

[0107] In a specific implementation, a first connecting rod 351 is fixedly connected to one end of the positioning member 32 facing the rod member 31, and a first connecting sleeve 352 is fixedly connected to one end of the rod member 31 facing the positioning member 32. The first connecting member 351 of the positioning member 32 can be inserted into the first connecting sleeve 352 and rotate around the center of the first connecting sleeve 352.

[0108] In a specific implementation, after the relative positions of the positioning member 32 and the rod member 31 are adjusted, the relative positions of the positioning member 32 and the rod member 31 are locked by the third locking member 354 to ensure the stability of the positioning member 32 in fixing the animal's head.

[0109] Specifically, the first connecting sleeve 352 has an opening extending axially on the circumference; the third locking component 354 can also be a clamp and a fastener matching therewith, the clamp is an annular structure with an opening, when locking, the clamp is sleeved on the outside of the first connecting sleeve 352, and the opening of the clamp is locked by the fastener, and the inner diameter of the clamp is reduced by the locking force, so that the first connecting sleeve 352 and the first connecting rod 351 are locked, so that the relative position between the positioning member 32 and the rod member 31 is locked, so that the positioning member 32 and the rod member 31 cannot move relative to each other.

[0110] In other implementation schemes, the connecting sleeve may be fixedly connected to the positioning member 32, and the connecting rod may be fixedly connected to the rod member 31, and the connecting rod of the rod member 31 may be inserted into the connecting sleeve of the positioning member 32, and the connecting sleeve and the connecting rod may rotate relative to each other.

[0111] The positioning member 32 and the rod member 31 of the ear rod 30 may also adopt other specific structures to realize the aforementioned various movable connection forms, for example, they may be hinged by hinges, may be rotated through shaft holes, etc., and the matching locking components may also adopt other methods, as long as the position of the positioning member 32 can be adjusted and locked with the position of the rod member 31.

[0112] In the illustrated example, the main body of the rod 31 of the ear rod 30 is a square rod structure. In other implementations, the main body of the rod 31 may also be a cylindrical rod or a prismatic rod.

[0113] In an application example, the dimensions of the positioning member 32 in the front-to-back direction, the height dimension in the up-down direction, and the dimension in the left-to-right direction are all set to be no less than 3 mm; the length of the rod 31 is set to be no less than 10 mm, and the reference dimension of the cross section of the rod 31 (such as length, width or diameter) is set to be no less than 3 mm.

[0114] Refer to Figure 1 In this embodiment, two second mounting platforms 13 are fixedly provided on the base plate 11 of the surgical platform 10 . The two second mounting platforms 13 are arranged along the left-right direction and are respectively used to carry and fix the two ear rods 30 .

[0115] In a specific implementation, the second mounting platform 13 has a mounting slot for the rod 31 carrying the ear rod 30, the mounting slot extending in the left-right direction, the rod 31 can be placed in the mounting slot, and can move along the mounting slot to adjust the relative distance between the positioning members 32 of the two ear rods 30. The ear rod 30 also includes a rod locking member 311. After the relative positions of the two ear rods 30 are adjusted, the relative position between the rod 31 and the second mounting platform 13 can be limited by the rod locking member 311 to ensure that the ear rod 30 will not shift after being fixed to the animal's head.

[0116] Exemplarily, the rod locking member 311 may be a screw or a bolt with a threaded structure, etc. The rod locking member 311 may be screwed into a threaded hole provided on the second mounting platform 13 to abut against the rod 31 , thereby limiting the position of the rod 31 .

[0117] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A head fixation device for animal brain surgery, characterized in that: It comprises two ear rods, each ear rod comprises a rod and a positioning member, the positioning member is connected to one end of the rod, and the positioning member has a concave portion that is concave toward the direction where the rod is located; The two ear bars are arranged along the left and right directions of the animal's head, the positioning members of the two ear bars are arranged facing each other, and the openings of the two concave parts are facing each other; the two concave parts are used to clamp the left and right sides of the animal's head.

2. The head fixing device according to claim 1, characterized in that: The positioning member includes at least two positioning parts, each of which has a positioning surface part, and a region between the positioning surface parts forms the concave part.

3. The head fixing device according to claim 2, characterized in that: The at least two positioning parts include a first positioning part and a second positioning part. The first positioning part is located above the second positioning part. The positioning surface part of the first positioning part and the positioning surface part of the second positioning part are arranged at a set angle.

4. The head fixing device according to claim 3, characterized in that: The at least two positioning parts further include a third positioning part and a fourth positioning part, the third positioning part is located in front of the fourth positioning part, and the positioning surface part of the third positioning part and the positioning surface part of the fourth positioning part are arranged at a set angle.

5. The head fixing device according to any one of claims 2 to 4, characterized in that: The positioning surface portion is one of a convex cylindrical surface, a concave cylindrical surface and a plane, and the surface shapes of the positioning surface portions are set differently; or at least some of the positioning surface portions are set to have the same surface shape.

6. The head fixing device according to claim 1, characterized in that: The concave portion of the positioning member is a concave arc surface or a concave spherical surface.

7. The head fixing device according to any one of claims 1 to 6, characterized in that: The positioning member is fixedly connected to the rod member.

8. The head fixing device according to any one of claims 1 to 6, characterized in that: The positioning member is movably connected to the rod member, and the ear rod further includes a locking component, which is used to limit the relative position between the positioning member and the rod member.

9. The head fixing device according to claim 8, characterized in that: The positioning member is pivotally connected to the rod, and the pivot axis of the positioning member is parallel to the horizontal direction and extends along the front-to-back direction; or, the positioning member is pivotally connected to the rod, and the pivot axis of the positioning member is the central axis of the rod; or, the positioning member is ball-jointed to the rod.

10. The head fixing device according to any one of claims 1 to 6, characterized in that: The head fixation device also includes a surgical platform, which includes two second mounting platforms, each of which has a mounting groove that supports the rod, and the rod can move along the mounting groove to adjust the distance between the two positioning members; the ear rod also includes a rod locking member, which is used to limit the relative position between the rod and the second mounting platform.

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