Calcaneus locking plate and calcaneus fixing device

Abstract

The utility model discloses a calcaneus locking plate and a calcaneus fixing device, and belongs to the technical field of medical instruments.The calcaneus locking plate comprises a plurality of locking parts, the multiple locking parts are arranged at intervals, and the locking parts are provided with locking holes; each connecting part is arranged between the at least two locking parts and is respectively connected with the at least two locking parts; wherein the locking hole of at least one locking part is a first locking hole, the first locking hole is used for connecting the locking part with the sustentaculum tali, and the first locking hole is provided with a first central axis AA '; the locking part has a connecting state of being connected to the sustentaculum tali, in the connecting state, a first included angle alpha is formed between the first central axis AA'and the coronal plane YY ', a second included angle beta is formed between the first central axis AA' and the cross section XX ', alpha is larger than or equal to 14 degrees and smaller than or equal to 18 degrees, and beta is larger than or equal to 3 degrees and smaller than or equal to 6 degrees. According to the calcaneus locking plate, the sustentaculum tali can be accurately positioned through the first locking holes in clinic, the locking screws are accurately guided, the accuracy of connecting the sustentaculum tali is improved, and the operation efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and specifically relates to a calcaneal locking plate and a calcaneal fixation device. Background Art

[0002] The calcaneus is the bone at the back of the foot. When the calcaneus is broken or fractured, surgery is required to reposition and stabilize the bone to promote healing. The Calcaneal Ring Locking Plate is used to treat calcaneal fractures. It fits the shape of the calcaneus closely and uses locking screws to secure the plate to the bone. This design provides better stability and support, which speeds up the fracture healing process.

[0003] The talar process is an important anatomical structure of the calcaneus. Because of its good structural stability and high cortical density, it is often used as a carrier for screws when fixing calcaneal fractures. The current calcaneal locking plate is not easy to accurately position and fix on the talar process during clinical application. Doctors are often required to manually place screws from the posterior outside to the anterior inside through the posterior articular surface of the calcaneus, which is less accurate. Using multiple CT scans to determine the position of the talar process will increase the exposure of doctors and patients to the radiation environment, and the surgical risk is relatively high. Utility Model Content

[0004] Purpose of the utility model: An embodiment of the present application provides a calcaneal locking plate, aiming to solve the technical problem that the current calcaneal locking plate is not convenient for accurate positioning and fixation on the talar process in clinical applications; another purpose of the embodiment of the present application is to provide a calcaneal fixation device.

[0005] Technical solution: A calcaneal locking plate described in an embodiment of the present application includes:

[0006] A plurality of locking parts, wherein the plurality of locking parts are arranged at intervals from each other, and each locking part has a locking hole;

[0007] A plurality of connecting parts, each of which is disposed between at least two of the locking parts and is respectively connected to at least two of the locking parts;

[0008] Wherein, at least one locking hole of the locking portion is a first locking hole, the first locking hole is used for connecting the locking portion with the load-carrying protrusion, and the first locking hole has a first central axis AA';

[0009] The locking portion has a connection state connected to the carrier protrusion, in which the first central axis AA' has a first angle α with the coronal plane YY' and a second angle β with the cross section XX', satisfying: 14°≤α≤18°, 3°≤β≤6°.

[0010] In some embodiments, the locking portion comprises:

[0011] Side 1;

[0012] a second surface, the second surface being opposite to the first surface and configured to contact a surface of the calcaneus;

[0013] The first locking hole passes through the first surface and the second surface;

[0014] In the connected state, from the first surface to the second surface, the first central axis AA′ extends obliquely upward and in a direction close to the cuboid joint surface and away from the calcaneal tuberosity.

[0015] In some embodiments, at least one locking hole of the locking portion is a second locking hole, the second locking hole is used to connect the locking portion with the carrier protrusion, and the second locking hole has a second central axis BB';

[0016] The second central axis BB' and the first central axis AA' are located in the same plane.

[0017] In some embodiments, the second central axis BB' and the first central axis AA' have a third angle δ, which satisfies: 4°≤δ≤8°.

[0018] In some embodiments, the locking portion having the first locking hole and the locking portion having the second locking hole are disposed adjacent to each other and are respectively connected to the same connecting portion.

[0019] In some embodiments, the connecting portion comprises:

[0020] a first end, the first end being connected to at least one of the locking portions;

[0021] a second end, the second end being away from the first end and connected to at least another locking portion;

[0022] The connecting portion extends from the first end to the second end, and has a plurality of cross sections perpendicular to its extending direction. From the first end to the second end, the areas of the plurality of cross sections first decrease and then increase.

[0023] In some embodiments, the cross section has a first dimension along a width direction of the connecting portion, wherein the width direction is perpendicular to an extension direction of the connecting portion and perpendicular to a thickness direction of the calcaneal locking plate;

[0024] From the first end to the second end, the first dimensions of the plurality of cross sections first decrease and then increase.

[0025] In some embodiments, among the plurality of cross sections, the first dimension of the cross section with the largest area is the largest and is W1, and the first dimension of the cross section with the smallest area is the smallest and is W2, satisfying: 1.0 <W1 / W2≤1.3。

[0026] In some embodiments, the cross section has a second dimension along a thickness direction of the calcaneal locking plate, the thickness direction being perpendicular to an extension direction of the connecting portion;

[0027] From the first end to the second end, the second dimensions of the plurality of cross sections first decrease and then increase.

[0028] In some embodiments, among the plurality of cross sections, the second dimension of the cross section with the largest area is the largest and is d1, and the second dimension of the cross section with the smallest area is the smallest and is d2, satisfying: 1.0 <d1 / d2≤1.3。

[0029] In some embodiments, among the multiple cross-sections, the cross-section with the largest area is located at the first end and / or the second end.

[0030] Accordingly, a calcaneal fixation device according to an embodiment of the present application includes:

[0031] The calcaneal locking plate mentioned above, and a plurality of locking screws, wherein the locking screws are used to penetrate into the locking holes.

[0032] Beneficial effects: The calcaneal locking plate of the embodiment of the present application comprises: a plurality of locking parts, the plurality of locking parts are arranged at intervals from each other, and the locking parts have locking holes; a plurality of connecting parts, each connecting part is arranged between at least two locking parts, and is respectively connected to at least two locking parts; wherein, the locking hole of at least one locking part is a first locking hole, the first locking hole is used to connect the locking part with the talar process, and the first locking hole has a first central axis AA'; the locking part has a connection state connected to the talar process, and in the connection state, the first central axis AA' has a first angle α with the coronal plane YY', and has a second angle β with the cross-section XX', satisfying: 14°≤α≤18°, 3°≤β≤6°. In the present application, by setting a first locking hole in the calcaneal locking plate, and setting the first central axis AA' of the first locking hole to satisfy the above-mentioned angle relationship with the coronal plane YY' and the cross-section XX', in clinical applications, the extension direction of the first locking hole can accurately point to the calcaneal tali process, and the first locking hole can provide guidance for the implanted calcaneal tali process locking screw, thereby improving the accuracy of positioning and connecting the calcaneal tali process, and thus improving the efficiency of the operation. In addition, in clinical applications, since the calcaneal tali process can be accurately positioned and the locking screw can be accurately guided by the first locking hole, it is helpful to accurately install the locking screw in place, which can effectively reduce the risk of thread failure of the first locking hole, reduce or even avoid skin irritation caused by the high protrusion of the locking screw, and avoid affecting the healing of the fracture.

[0033] The calcaneal fixation device of the embodiment of the present application may have all the technical features and technical effects of the above-mentioned calcaneal locking plate, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A schematic diagram of the front view of the calcaneal locking plate provided in an embodiment of the present application;

[0036] Figure 2 for Figure 1 Schematic diagram of the right side structure of the mid-calcaneal locking plate;

[0037] Figure 3 for Figure 1 A schematic diagram of the top view of the mid-calcaneal locking plate;

[0038] Figure 4 This is a schematic diagram of a connection state of a calcaneal locking plate connected to a calcaneal bone according to an embodiment of the present application;

[0039] Figure 5 A schematic structural diagram of the calcaneal locking plate according to an embodiment of the present application from another angle;

[0040] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of the mid-calcaneal locking plate along line AA;

[0041] Figure 7 for Figure 5 Schematic diagram of the cross-sectional structure of the mid-calcaneal locking plate along line BB;

[0042] Figure 8 for Figure 5 Schematic diagram of the cross-sectional structure of the mid-calcaneal locking plate along the CC line;

[0043] Fig. 9 A schematic diagram of the angle between the first central axis of the first locking hole and the second central axis of the second locking hole;

[0044] Fig.10 This is a schematic diagram of a first size of a connecting portion in a calcaneal locking plate according to an embodiment of the present application;

[0045] Fig.11 A schematic diagram of a second size of the connecting portion of the calcaneal locking plate according to an embodiment of the present application;

[0046] Fig.12 for Fig.11 Schematic diagram of the cross section at position O of the middle connection;

[0047] Figure markings: 100-locking part; 110-locking hole; 111-first locking hole; 112-second locking hole; 120-first surface; 130-second surface; 200-connecting part; 210-first end; 220-second end; 230-cross section; 300-calcaneus; 310-talar process; 320-cuboidal joint surface; 330-calcaneal tuberosity. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0049] In the description of the present application, it should be understood that the terms "width", "thickness", "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 the present application. In the description of the present application, "plurality" means two or more than two, and at least one means one, two or more than two, unless otherwise clearly and specifically defined.

[0050] It should also be noted that in the drawings of the embodiments of the present application, arrows marked with X, Y, and Z respectively represent the extension direction X of the connection part 200, the width direction Y of the connection part 200, and the thickness direction Z of the calcaneal locking plate. The description of the present application introduces the extension direction X, the width direction Y, and the thickness direction Z in order to more clearly describe the structural and dimensional parameter changes of the connection part 200 in the calcaneal locking plate. Different connection parts 200 may have different extension directions X and width directions Y. Among them, the extension direction X, the width direction Y, and the thickness direction Z are perpendicular to each other.

[0051] In the related art, the locking holes for locking the talar process on the calcaneal ring-type locking plate are generally designed to be perpendicular to the upper and lower surfaces of the locking plate, or to be designed as universal holes. Neither of these two structures can provide guidance for clinical fixation of the talar process, and doctors are required to use the posterior articular surface of the calcaneus to manually place screws from the posterior outside to the front inside based on experience, which has low accuracy. Taking multiple CT scans to determine the position of the talar process will increase the exposure of doctors and patients to the radiation environment. In addition, improper screw implantation can lead to complications such as insufficient screw holding force and damage to the inferior articular surface. Even if the screw can be accurately fixed to the talar process, due to the inconsistency between the direction and the locking hole direction of the bone plate, it will cause misalignment between the screw and the calcaneal ring-type locking plate, the screw protrudes higher, and the risk of thread failure will be higher. The calcaneus is directly under the skin, and the internal implant protrusion will cause skin irritation and affect fracture healing. In addition, the locking hole connecting rod of the calcaneal ring locking plate is generally designed as a uniform cross-sectional structure. When a bending rod is used for shaping, the deformation starting point is located at the edge of the locking hole and causes stress concentration, which not only damages the locking hole thread and affects the implantation of the screw, but also easily causes the plate to break.

[0052] In view of this, an embodiment of the present application provides a calcaneal locking plate, aiming to overcome at least one of the above-mentioned technical problems.

[0053] Please also read Figure 1 and Figure 4The calcaneal locking plate of the embodiment of the present application includes a plurality of locking parts 100 and a plurality of connecting parts 200. The locking part 100 is used to connect with the calcaneal 300, so as to connect the calcaneal locking plate with the calcaneal 300. The locking part 100 has a locking hole 110, and the calcaneal 300 can be drilled at the locking hole 110, and the locking part 100 can be locked on the calcaneal 300 with a screw. By arranging a plurality of locking parts 100 at intervals from each other, different positions of the calcaneal 300 can be locked. Among the plurality of connecting parts 200, each connecting part 200 is arranged between at least two locking parts 100, and is respectively connected to at least two locking parts 100, so that the fractured bones can be fixed together, and the repair treatment of the fracture of the calcaneal 300 can be achieved.

[0054] Among them, the locking hole 110 of at least one locking part 100 is a first locking hole 111, and the first locking hole 111 is used to connect the locking part 100 with the spur 310. The bone cortex of the spur 310 is thick and hard, and can more stably fix the calcaneal locking plate. The first locking hole 111 has a first central axis AA'. It should be noted that the first central axis AA' is the central axis inside the first locking hole 111, which determines the position and extension direction of the first locking hole 111, and of course also determines the position and extension direction of the thread structure of the first locking hole 111. The first central axis AA' is a virtual line, and the first central axis AA' of the first locking hole 111 can be accurately measured and located using measuring tools and equipment.

[0055] Please also read Figure 1 , Figure 2 , Figure 3 and Figure 4In the embodiment of the present application, the locking portion 100 has a connection state connected to the calcaneal process 310, and the connection state can be a state after the locking portion 100 and the calcaneal 300 are locked by screws; the connection state can also be a state in which the calcaneal locking plate is placed on the calcaneal 300 before drilling and locking, so that the locking portion 100 and the calcaneal 300 fit. That is to say, the connection state is not limited to connecting and locking the locking portion 100 to the calcaneal process 310. In the connection state, the first central axis AA' has a first angle α with the coronal plane YY', and has a second angle β with the cross section XX', satisfying: 14°≤α≤18°, 3°≤β≤6°. Among them, the coronal plane YY' and the cross section XX' are both anatomical planes, and the coronal plane YY' is also called the coronal plane or coronal section, which is a plane perpendicular to the body axis and divides the body into two parts, front and back; the cross section XX' is also called the horizontal section, which divides the body into two parts, upper and lower. The angles between the first central axis AA', the coronal plane YY' and the cross-section XX' satisfy the above-mentioned angle relationship, so that in clinical applications, the first central axis AA' can pass through the carrier protrusion 310, so that the extension direction of the first locking hole 111 points to the carrier protrusion 310, and the first locking hole 111 can provide guidance for the locking screw implanted in the carrier protrusion 310, thereby improving the accuracy of positioning and connecting the carrier protrusion 310, thereby improving the efficiency of the operation. Specifically, the first angle α can be any angle value among 14°, 15°, 16°, 17°, 18°, or a range value between any two angle values. The second angle β can be any angle value among 3°, 4°, 5°, 6°, or a range value between any two angle values.

[0056] In some embodiments, the multiple locking parts 100 and the multiple connecting parts 200 of the calcaneal locking plate are connected to form multiple annular structures, and the annular design can provide better tight fit and support, so the calcaneal locking plate can also be called a calcaneal annular locking plate. In addition, in some embodiments, the calcaneal locking plate can be a flat locking plate.

[0057] Please also read Figure 2 , Figure 3 and Figure 4 In some embodiments, the locking portion 100 includes a first surface 120 and a second surface 130, the second surface 130 and the first surface 120 are two surfaces of the locking portion 100 that are opposite to each other, and the first locking hole 111 passes through the first surface 120 and the second surface 130. The second surface 130 is used to contact the surface of the calcaneus 300. In clinical applications, the second surface 130 is attached to the surface of the calcaneus 300. Please combine Figure 5 , Figure 6 and Figure 7, among the multiple locking parts 100 of the calcaneal locking plate, the extending direction of the locking hole 110 of some locking parts 100 is perpendicular to the first surface 120 and the second surface 130 thereof, while the locking hole 110 of some locking parts 100 is the first locking hole 111, and its extending direction (i.e., the first central axis AA') is inclined to the first surface 120 and the second surface 130. Specifically, in the connected state, from the first surface 120 to the second surface 130, the first central axis AA' extends obliquely upward, toward the direction close to the cuboid joint surface 320 and away from the calcaneal tuberosity 330. It should be noted that in the description of the present application, the direction from the plantar plane of the human body to the head is taken as the upward reference direction, and the direction from the calcaneal tuberosity 330 to the cuboid joint surface 320 is taken as the forward reference direction. The above-mentioned "obliquely upward" means that the first central axis AA' extends obliquely upward from the first surface 120 to the second surface 130 in a direction gradually away from the plantar plane and close to the head. Thus, in the connected state, the extension direction of the first locking hole 111 is inclined upward and forward, so that the calcaneal process 310 can be positioned more accurately, and the locking screw can be accurately penetrated into the calcaneus and locked on the calcaneal process 310, fully ensuring the holding force of the screw and avoiding thread failure of the first locking hole 111.

[0058] For further information, please refer again to Figures 1 to 4 In some embodiments, the locking hole 110 of at least one locking part 100 is a second locking hole 112. The second locking hole 112 is used to connect the locking part 100 with the carrier projection 310. The second locking hole 112 has a second central axis BB', which is the central axis inside the second locking hole 112, and determines the position and extension direction of the second locking hole 112. Of course, it also determines the position and extension direction of the thread structure of the second locking hole 112. The second central axis BB' is a virtual line, and the second central axis BB' of the second locking hole 112 can be accurately measured and located using measuring tools and equipment. The second locking hole 112 can be matched with the first locking hole 111 to realize the locking of the carrier projection 310 with a double locking screw. At the same time, the second central axis BB' and the first central axis AA' are located in the same plane, which can more accurately locate the carrier projection 310 on the one hand, and improve the overall anti-pullout ability on the other hand, and ensure more reliable fixation.

[0059] Please combine Figure 5 and Figure 8 The extension direction of the second locking hole 112 (ie, the second central axis BB′) is also inclined to the first surface 120 and the second surface 130 .

[0060] For further information, see Fig. 9, the second central axis BB' and the first central axis AA' have a third angle δ, satisfying: 4°≤δ≤8°. Within this angle range, the locking screws of the first locking hole 111 and the second locking hole 112 can be locked in two directions respectively, further improving the overall anti-pullout capability, and can also more accurately locate the load-bearing protrusion 310. Specifically, the third angle δ can be any angle value among 3°, 4°, 5°, 6°, or a range value between any two angle values.

[0061] In some embodiments, among the multiple locking parts 100 of the calcaneal locking plate, the locking part 100 having the first locking hole 111 and the locking part 100 having the second locking hole 112 are arranged adjacent to each other and are respectively connected to the same connecting part 200. Thus, the two adjacent locking parts 100 can be connected to the calcaneal protrusion 310, further improving the overall anti-pullout capability and also further improving the positioning accuracy.

[0062] See also Fig.10 In some embodiments, the connecting portion 200 includes a first end 210 and a second end 220, the first end 210 is connected to at least one locking portion 100, and the second end 220 is opposite to the first end 210 and connected to at least another locking portion 100. That is, the first end 210 and the second end 220 are two opposite ends of the connecting portion 200, and the connecting portion 200 is connected between at least two locking portions 100 through its first end 210 and the second end 220. The connecting portion 200 extends from the first end 210 to the second end 220, and the connecting portion 200 has a plurality of cross sections 230 perpendicular to its extension direction X. From the first end 210 to the second end 220, the areas of the plurality of cross sections 230 first decrease and then increase. That is, from the first end 210 to the second end 220, the connecting portion 200 first becomes thinner and then becomes thicker, and the strength of the thinner position is lower. Therefore, in clinical applications, when using a bending rod to shape the bone plate, the deformation starting point is located at a position where the cross-section 230 of the connecting portion 200 is smaller, which can avoid stress concentration on the locking portions 100 at both ends and reduce the risk of plate breakage. At the same time, it also avoids the thread of the locking hole 110 being damaged due to the deformation of the locking portion 100, thereby avoiding affecting the implantation of the screw. In addition, compared with the uniform cross-section design, the variable cross-section design requires less shaping force to produce the same deformation of the connecting portion 200, making the calcaneal locking plate easier to shape and more convenient for surgical operation.

[0063] Please combine Fig.10 and Fig.12, in some embodiments, the cross-section 230 has a first dimension along the width direction Y of the connecting portion 200. From the first end 210 to the second end 220, the first dimension of the plurality of cross-sections 230 first decreases and then increases. In this embodiment, the first dimension is the width dimension of the connecting portion 200. By adjusting the width dimension of the connecting portion 200 to be thinner first and then thicker, the strength at the position with a smaller width dimension is lower. In clinical applications, when using a bending rod to shape the bone plate, the starting position of deformation is at the position where the width of the connecting portion 200 is narrower.

[0064] Specifically, please refer to Fig.10 , among the plurality of cross-sections 230, the cross-section 230 with the largest area has the largest first dimension, which is W1, and the cross-section 230 with the smallest area has the smallest first dimension, which is W2, satisfying: 1.0 < W1 / W2 ≤ 1.3. W1 / W2 can be any ratio among 1.1, 1.2, 1.3 or the range value between any two ratios.

[0065] Please also combine with Fig.11 and Fig.12 , in some embodiments, the cross-section 230 has a second dimension along the thickness direction Z of the calcaneal locking plate. From the first end 210 to the second end 220, the second dimension of the plurality of cross-sections 230 first decreases and then increases. In this embodiment, the second dimension is the thickness dimension of the connecting portion 200. By adjusting the thickness dimension of the connecting portion 200 to be thinner first and then thicker, the strength at the position with a smaller thickness dimension is lower. In clinical applications, when using a bending rod to shape the bone plate, the starting position of deformation is at the position where the thickness of the connecting portion 200 is thinner.

[0066] Specifically, please refer to Fig.12 , among the plurality of cross-sections 230, the cross-section 230 with the largest area has the largest second dimension, which is d1, and the cross-section 230 with the smallest area has the smallest second dimension, which is d2, satisfying: 1.0 < d1 / d2 ≤ 1.3. d1 / d2 can be any ratio among 1.1, 1.2, 1.3 or the range value between any two ratios.

[0067] It can be understood that, in some embodiments, the first dimension (width dimension of the connecting portion 200) and the second dimension (thickness dimension of the connecting portion 200) can also be adjusted simultaneously, so that from the first end 210 to the second end 220, the connecting portion 200 first becomes thinner and then thicker, reducing the shaping force required for the calcaneal locking plate to deform, making it easier to shape, and not causing stress concentration near the locking hole 110 to damage the thread or even cause the plate to break. In this embodiment, W1 and W2, d1 and d2 still satisfy 1.0 < W1 / W2 ≤ 1.3 and 1.0 < d1 / d2 ≤ 1.3 respectively.

[0068] Furthermore, in some embodiments, among the multiple cross sections 230, the cross section 230 with the largest area is located at the first end 210 and / or the second end 220. Thus, the connection position between the connecting portion 200 and the locking portion 100 is thicker, and it is less likely to generate stress concentration during shaping, thereby avoiding damage to the thread.

[0069] Correspondingly, an embodiment of the present application further provides a calcaneal fixation device, which includes: the above-mentioned calcaneal locking plate, and a plurality of locking screws, wherein the locking screws are used to pass through the locking holes 110 .

[0070] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0071] The calcaneal locking plate and calcaneal fixation device provided in the embodiments of the present application are introduced in detail above, and the principles and implementation methods of the present application are explained by using specific examples. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A calcaneal locking plate, characterized in that: include: A plurality of locking parts, wherein the plurality of locking parts are arranged at intervals from each other, and each locking part has a locking hole; A plurality of connecting parts, each of which is disposed between at least two of the locking parts and is respectively connected to at least two of the locking parts; Wherein, at least one locking hole of the locking portion is a first locking hole, the first locking hole is used for connecting the locking portion with the load-carrying protrusion, and the first locking hole has a first central axis AA'; The locking portion has a connection state connected to the carrier protrusion, in which the first central axis AA' has a first angle α with the coronal plane YY' and a second angle β with the cross section XX', satisfying: 14°≤α≤18°, 3°≤β≤6°.

2. The calcaneal locking plate according to claim 1, characterized in that: The locking portion comprises: First side; a second surface, the second surface being opposite to the first surface and configured to contact a surface of the calcaneus; The first locking hole passes through the first surface and the second surface; In the connected state, from the first surface to the second surface, the first central axis AA′ extends obliquely upward and in a direction close to the cuboid joint surface and away from the calcaneal tuberosity.

3. The calcaneal locking plate according to claim 1, characterized in that: At least one locking hole of the locking portion is a second locking hole, the second locking hole is used for connecting the locking portion with the carrier projection, and the second locking hole has a second central axis BB'; The second central axis BB' and the first central axis AA' are located in the same plane.

4. The calcaneal locking plate according to claim 3, characterized in that: The second central axis BB' and the first central axis AA' have a third angle δ, which satisfies: 4°≤δ≤8°.

5. The calcaneal locking plate according to claim 3, characterized in that: The locking portion having the first locking hole and the locking portion having the second locking hole are arranged adjacent to each other and are respectively connected to the same connecting portion.

6. The calcaneal locking plate according to claim 1, characterized in that: The connecting portion comprises: a first end, the first end being connected to at least one of the locking portions; a second end, the second end being away from the first end and connected to at least another locking portion; The connecting portion extends from the first end to the second end, and has a plurality of cross sections perpendicular to its extending direction. From the first end to the second end, the areas of the plurality of cross sections first decrease and then increase.

7. The calcaneal locking plate according to claim 6, characterized in that: The cross section has a first dimension along a width direction of the connecting portion, wherein the width direction is perpendicular to an extension direction of the connecting portion and perpendicular to a thickness direction of the calcaneal locking plate; From the first end to the second end, the first dimensions of the plurality of cross sections first decrease and then increase.

8. The calcaneal locking plate according to claim 7, characterized in that: Among the plurality of cross sections, the first dimension of the cross section with the largest area is the largest and is W1, and the first dimension of the cross section with the smallest area is the smallest and is W2, satisfying: 1.0 <W1 / W2≤1.3。 9. The calcaneal locking plate according to any one of claims 6 to 8, characterized in that: The cross section has a second dimension along a thickness direction of the calcaneal locking plate, wherein the thickness direction is perpendicular to an extension direction of the connecting portion; From the first end to the second end, the second dimensions of the plurality of cross sections first decrease and then increase.

10. The calcaneal locking plate according to claim 9, characterized in that: Among the multiple cross sections, the second dimension of the cross section with the largest area is the largest and is d1, and the second dimension of the cross section with the smallest area is the smallest and is d2, satisfying: 1.0 <d1 / d2≤1.3。 11. The calcaneal locking plate according to claim 6, characterized in that: Among the multiple cross-sections, the cross-section with the largest area is located at the first end and / or the second end.

12. A calcaneal fixation device, characterized in that: include: The calcaneal locking plate according to any one of claims 1 to 11, and A plurality of locking screws are provided, wherein the locking screws are used to penetrate into the locking holes.

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