Locking type fixing device

Abstract

The invention discloses a locking type fixing device. The locking type fixing device comprises a fixing base, a support and a fastener. The fixing base comprises a main base, a limiting block and a supporting base. A mounting part is arranged on one side of the main base and provided with a groove. The limiting block is arranged in the groove and provided with a limiting groove. The supporting seat is connected to the main base and corresponds to the limiting block. The support comprises a limiting column, and the support is arranged in the limiting groove through the limiting column so as to be assembled on the fixing base. The fastener is arranged on the supporting seat. The fastener abuts against the limiting column so as to fix the support. The locking type fixing device does not need to be assembled on an adapter and other connecting parts firstly, the overall structure has selectable stability, and operation is easy.

Description

TECHNICAL FIELD

[0001] The present application relates to a locking type fixing device, in particular to a locking type fixing device of a surgical navigation marker assembly. BACKGROUND

[0002] Before performing a minimally invasive surgery such as a spine surgery or a laparocentesis, a plurality of marker assemblies (e.g. reflective balls) are arranged on a surgical site on a limb and a surgical instrument, and the plurality of marker assemblies are used to provide coordinate signals to facilitate a surgeon to operate the surgical instrument through a surgical navigation system.

[0003] In the prior art, the plurality of marker assemblies are arranged on a bracket, and the bracket is connected to a fixing base through an adapter, and then the fixing base is fixed to a positioning needle inserted into a body (e.g. a bone). The fixing device for fixing the plurality of marker assemblies is composed of a plurality of parts, and must be assembled before use, so the operation is relatively complicated, and it is difficult to stably fix the plurality of marker assemblies.

[0004] Therefore, how to overcome the above-mentioned defects through structural design improvement has become one of the important issues to be solved in this field. SUMMARY

[0005] The present application mainly provides a locking type fixing device to solve the problem that the fixing tool for fixing the marker assemblies in the prior art needs to be used after complicated assembly steps, and stably fixes the marker assemblies.

[0006] In order to solve the above-mentioned technical problems, one of the technical solutions adopted by the present application is to provide a locking type fixing device, which comprises a fixing base, a bracket and a fastener. The fixing base comprises a main base, a limiting block and a supporting seat. One side of the main base is provided with a mounting portion, and the mounting portion has a groove. The limiting block is arranged in the groove, and the limiting block has a limiting slot. The supporting seat is connected to the main base and corresponds to the limiting block. The bracket comprises a limiting column, and the bracket is assembled to the fixing base by arranging the limiting column in the limiting slot. The fastener is arranged on the supporting seat. The fastener abuts against the limiting column to fix the bracket.

[0007] One of the beneficial effects of the present application is that the locking type fixing device provided by the present application is a one-piece design, which directly connects the fixing base with the bracket, and then fixes the fixing base to the positioning needle. In other words, the locking type fixing device of the present application does not need to be assembled to the adapter and other connecting parts first, the overall structure has optional stability, and the operation is relatively simple.

[0008] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a locking fixing device according to an embodiment of the present invention.

[0010] Figure 2 This is an exploded view of the locking and fixing device according to an embodiment of the present invention.

[0011] Figure 3 This is a schematic diagram of the groove and notch of the main base in an embodiment of the present invention.

[0012] Figure 4 This is a first schematic diagram of the bracket and limiting block of the locking fixing device according to an embodiment of the present invention.

[0013] Figure 5 This is a second schematic diagram of the bracket and limiting block of the locking fixing device according to an embodiment of the present invention.

[0014] Figure 6 This is a third schematic diagram of the bracket and limiting block of the locking fixing device according to an embodiment of the present invention.

[0015] Figure 7 for Figure 1 A schematic diagram of section VII-VII.

[0016] Figure 8 This is a cross-sectional schematic diagram of the gasket according to an embodiment of the present invention.

[0017] Figure 9 for Figure 1 Another schematic diagram of section VII-VII. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of the "locking fastening device" disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions of actual dimensions; this is stated beforehand. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention.

[0019] It should be understood that although the terms "first", "second", "third" and the like can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. In addition, the term "or" as used herein should be considered to mean a combination of any one or more of the associated listed items.

[0020] Embodiments

[0021] Referring to Figure 1 With Figure 2 As shown in FIG. 1, an embodiment of the present application provides a locking type fixing device F, which includes a fixing base 1, a support 2, and a fastener 3. The fixing base 1 includes a main base 11, a limiting block 12, and a support base 13. The main base 11 is provided with a mounting portion 111 on one side thereof, the mounting portion 111 has a recess 112, and the limiting block 12 is arranged in the recess 112. The limiting block 12 includes two side walls 121, and a limiting groove 12T is formed between the two side walls 121. The support base 13 is connected to the main base 11 and is located on the same side of the main base 11 as the mounting portion 111. More specifically, the support base 13 corresponds to the limiting block 12, and the limiting block 12 is located between the mounting portion 111 and the support base 13. The fastener 3 is movably arranged in the support base 13, as shown in FIG. 2, the fastener 3 can move back and forth in a direction (Y-axis direction). Figure 2 As shown in FIG. 2, the fastener 3 can move back and forth in a direction (Y-axis direction).

[0022] The main base 11 has a plurality of screw holes C, and the support base 13 can be fixed on the main base 11 by being locked to the plurality of screw holes C by a plurality of screw members B1. However, the present application is not limited to the way that the support base 13 is fixed on the main base 11. The support 2 includes a limiting column 21, and the support 2 can be arranged in the limiting groove 12T by the limiting column 21, and then assembled to the fixing base 1. The fastener 3 abuts against the limiting column 21 to fix the support 2. In addition, the support 2 can include a plurality of support arms, and each support arm is provided with a fixing pin 22. In the present application, the support 2 is a dynamic reference frame (DRF), and a plurality of marker components (such as a reflective ball, not shown in the figure) can be carried by the plurality of fixing pins 22.

[0023] Continuing to refer to Figure 1 and Figure 2The main base 11 further comprises a plurality of mounting holes 110 and a plurality of through holes V. The mounting holes 110 and the through holes V can be located on different surfaces of the main base 11. The mounting holes 110 are respectively in communication with the through holes V. In addition, the fixing base 1 can further comprise a plurality of fixing members 14. In use, a positioning needle (not shown) inserted into a body (e.g. a bone) is passed through the mounting holes 110, and the fixing members 14 are inserted into the through holes V to abut against the positioning needle. By tightening the fixing members 14, a force is applied to fix the fixing base 1 and the support 2 together on the positioning needle. Further, a plurality of the marker assemblies provided on the support 2 provide a reference for a medical staff to operate a surgical navigation instrument through a surgical navigation system (SNS) to perform a surgery.

[0024] Referring to Figure 2 , Figure 3 and Figure 4 , the limiting block 12 has a plurality of toothed portions 122 adjacent to one side of the groove 112. The bottom surface of the groove 112 has a plurality of notched portions 113 corresponding to the plurality of toothed portions 122. In detail, the plurality of toothed portions 122 and the plurality of notched portions 113 are arranged in a fixed interval and in a radial manner.

[0025] Referring to Figure 5 and Figure 6 , the limiting block 21 comprises a first portion 211, a second portion 212 and a third portion 213. The second portion 212 is disposed between the first portion 211 and the third portion 213. The shape of the second portion 212 is different from that of the first portion 211 and the third portion 213. For example, the first portion 211 and the third portion 213 are polygonal columnar bodies, and the second portion 212 is a cylindrical body. The diameter of the cylindrical body (the second portion 212) is smaller than the width of the polygonal columnar bodies (the first portion 211 and the third portion 213). Therefore, a stepped portion ST is formed between the second portion 212 and the first portion 211, and between the second portion 212 and the third portion 213.

[0026] As shown in Figure 6 , when the limiting block 21 of the support 2 is assembled with the limiting block 12, the second portion 212 of the limiting block 21 is clamped in the limiting groove 12T, and the two side walls 121 of the limiting block 12 limit the support 2 in a first direction (Z-axis direction). In addition, the first portion 211 and the third portion 213 abut against the two side walls 121 through the stepped portion ST, so that the support 2 is limited in a second direction (X-axis direction), and the first direction is perpendicular to the second direction.

[0027] Referring to Figure 2 and Figure 7As shown, the locking type fixing device F can further include a washer 4 and a resilient member 5. The washer 4 is disposed between the limiting block 12 and the support seat 13, and the resilient member 5 is disposed between the washer 4 and the support seat 13. As shown Figure 7 As shown, the first end 51 of the resilient member 5 abuts against the washer 4, and the second end 52 of the resilient member 5 abuts against the support seat 13. In this way, the resilient member 5 is squeezed to generate elastic force (i.e. elastic restoring force) to push the washer 4, so that the washer 4 abuts against the two side walls 121 of the limiting block 12, and pushes the limiting block 12 to be clamped in the groove 112. Further, the plurality of toothed portions 122 of the limiting block 12 are clamped in the plurality of notched grooves 113 of the mounting portion 111, respectively.

[0028] Referring back to Figure 1 As shown, the bracket 2 can be rotated along the first rotating direction D1 with the limiting block 12 as the pivot and the Y-axis direction as the axial direction. When the bracket 2 is rotated, the plurality of toothed portions 122 and the plurality of notched grooves 113 will move relative to each other and be misaligned. Through the design of the toothed portions 122 and the notched grooves 113, the user can conveniently control the rotating angle of the bracket 2, and the bracket 2 can be stably limited regardless of the orientation, and is not prone to angular deviation.

[0029] It should be further noted that in the present application, the elastic force of the resilient member 5 can be maintained at a fixed value without artificial adjustment. The fixed elastic force applied by the resilient member 5 can appropriately limit the plurality of toothed portions 122 in the plurality of notched grooves 113, and the user does not need to exert too much force to smoothly rotate the bracket 2. In other words, the elastic force of the resilient member 5 will not cause excessive interference between the toothed portions 122 and the notched grooves 113, making it difficult for the user to rotate the bracket 2.

[0030] By contrast, the existing fixing device generates elastic force by compressing the spring assembly driven by the knob and the shaft column. Further, the elastic force provided by the spring assembly inside the existing fixing device is not a fixed value, but the user needs to manually rotate the knob to control the elastic force of the spring assembly to a certain degree before the reflector bracket can be rotated. Therefore, the elastic force provided by the spring assembly can not be the same every time, and the adjustment cannot be consistent.

[0031] Referring to Figure 7 to Figure 9 As shown, the fastener 3 includes a knob 31 and a shaft column 32, and the resilient member 5 and the washer 4 are sleeved on the shaft column 32. The shaft column 32 is perpendicular to the limiting column 21 of the bracket 2 (see Figure 2 ). The shaft column 32 has a first end 321 and a second end 322, the knob 31 is disposed on the first end 321, and the second end 322 has a flange portion 323. As shown Figure 8As shown, the washer 4 has a first opening 41 and a second opening 42, the first opening 41 has a hole diameter L1 smaller than the hole diameter L2 of the second opening 42, and the cross-sectional width of the second end 322 (together with the flange portion 323) of the shaft column 32 is greater than the hole diameter L1 but smaller than the hole diameter L2. When the washer 4 is sleeved on the shaft column 32, the first opening 41 is arranged close to the elastic member 5, and the second opening 42 is arranged close to the limiting block 12.

[0032] Figure 7 With Figure 9 respect to the different positions of the shaft column 32. In Figure 7 , the shaft column 32 has not yet abutted against the limiting column 21 of the support 2, and there is a spacing H between the second end 322 of the shaft column 32 and the first portion 211 and the third portion 213 of the limiting column 21; while in Figure 9 , the knob 31 is rotated (for example, clockwise) to drive the shaft column 32 to move towards the limiting column 21, so that the second end 322 of the shaft column 32 moves a distance approximately equal to the spacing H to abut against the limiting column 21. In other words, the spacing H is the stroke of the shaft column 32. After the shaft column 32 abuts against the limiting column 21, another screw member B2 is inserted into the fixing hole 310 of the knob 31 to fix the shaft column 32.

[0033] Further, since the diameter of the cylindrical body (the second portion 212) of the limiting column 21 is smaller than the width of the polygonal column (the first portion 211 and the third portion 213), the second end 322 of the shaft column 32 actually abuts against the side edges (for example Figure 5 , the side edge 2131 of the third portion 213 shown) of the first portion 211 and the third portion 213.

[0034] Referring back to Figure 1 and Figure 5 shown. Optionally, the first portion 211 and the third portion 213 can be hexagonal column. As Figure 5 can be seen, the structural design of the hexagonal column makes the profile shape of the limiting column 21 at the first portion 211 and the third portion 213 closer to a circle, which is beneficial for the user to rotate the support 2 (in the second rotation direction D2) with less effort, with the X axis as the rotation axis. Therefore, the support 2 has two degrees of freedom and can be rotated in the first rotation direction D1 and the second rotation direction D2, respectively.

[0035] In addition, the structural design of the hexagonal column can make the contact between the limiting column 21 and the limiting block 12 and the shaft column 32 be the contact between straight edges and straight edges, which is convenient for the user to control the self-rotation angle of the support 2, and the support 2 can be stably limited regardless of the orientation to which the support 2 is self-rotated, and is not easy to generate angle deviation.

[0036] On the other hand, when it is necessary to readjust the rotation angle or rotation angle of the bracket 2, the screw B2 can be loosened and removed first, and then the knob 31 can be turned (for example, counterclockwise) to move the shaft 32 away from the limit post 21. Furthermore, when the shaft 32 is moved to a distance approximately equal to the distance H, the flange 323 around the second end 322 will abut against the periphery of the first opening 41 inside the washer 4, preventing the user from applying too much force and causing the shaft 32 to detach from the washer 4.

[0037] Beneficial effects of the embodiments

[0038] The locking device provided by this invention is an integrated design, in which the bracket 2 is directly connected to the fixing base 1, and then the fixing base 1 is fixed to the positioning pin (not shown in the figure). In other words, the locking device F of this invention does not need to be assembled onto the adapter and other connecting parts as in existing fixing devices. The overall structure has optional stability and is relatively simple to operate.

[0039] Furthermore, the present invention utilizes the elastic element 5 to generate elastic force to limit the limiting block 12 within the groove 112, and the elastic force provided by the elastic element 5 can maintain a fixed value without manual adjustment. The fixed elastic force applied by the elastic element 5 can properly limit the multiple protruding teeth 122 within the multiple grooves 113, allowing the user to smoothly rotate the bracket 2 without applying too much force. In other words, the elastic force of the elastic element 5 will not cause excessive interference between the protruding teeth 122 and the grooves 113, making it difficult for the user to rotate the bracket 2.

[0040] Furthermore, in this invention, the first part 211 and the third part 213 of the limiting post 21 are hexagonal prisms. The hexagonal prism structure design makes the outline shape of the first part 211 and the third part 213 of the limiting post 21 closer to a circle, which is beneficial for the user to rotate the bracket 2 in a less strenuous way.

[0041] In addition, the hexagonal prism structure design ensures that the contact between the limiting post 21, the limiting block 12, and the shaft post 32 is a straight-side contact, which makes it convenient for users to control the rotation angle of the bracket 2. No matter which direction the bracket 2 rotates to, it can be stably limited and is not prone to angular deviation.

[0042] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of protection of the claims of the present invention. Therefore, all equivalent technical changes made based on the content of the present invention specification and drawings are included within the scope of protection of the claims of the present invention.

Claims

1. A locking fixture, characterized in that, The locking type fixing device comprises: a fixing base comprising: a main base provided with a mounting portion having a recess; a limiting block arranged in the recess, the limiting block having a limiting groove; and a supporting base connected to the main base and corresponding to the limiting block; a support comprising a limiting column, the support being assembled to the fixing base by arranging the limiting column in the limiting groove; and a fastener arranged in the supporting base, the fastener abutting against the limiting column to fix the support.

2. The locking fixation device of claim 1, wherein, The limiting block comprises two side walls, and the limiting groove is formed between the two side walls.

3. The locking fixation device of claim 2, wherein, The locking type fixing device further comprises a gasket arranged between the limiting block and the supporting base.

4. The locking fixation device of claim 3, wherein, The locking type fixing device further comprises an elastic member arranged between the gasket and the supporting base, one end of the elastic member abutting against the gasket, and the other end of the elastic member abutting against the supporting base.

5. The locking fixation device of claim 4, wherein, The limiting block has a plurality of toothed portions adjacent to one side of the recess, and the bottom surface of the recess has a plurality of grooves corresponding to the plurality of toothed portions.

6. The locking fixation device of claim 5, wherein, The elastic member is used to generate an elastic force to push the gasket against the two side walls of the limiting block, so that the plurality of toothed portions of the limiting block are respectively clamped in the plurality of grooves.

7. The locking fixation device of claim 4, wherein, The limiting column comprises a first portion, a second portion and a third portion, the second portion is arranged between the first portion and the third portion, and the shape of the second portion is different from the first portion and the third portion, the first portion and the third portion are polygonal column bodies, and the second portion is a cylindrical body, the diameter of the cylindrical body is smaller than the width of the polygonal column bodies.

8. The locking fixation device of claim 7, wherein, The second portion and the first portion and the third portion form a stepped portion, the limiting column is clamped in the limiting groove by the second portion, and the stepped portion of the first portion and the third portion abuts against the two side walls of the limiting block, so that the support is limited in a first direction and a second direction, the first direction is perpendicular to the second direction.

9. The locking fixation device of claim 7, wherein, The fastener comprises a knob and a shaft column, the elastic member and the gasket are sleeved on the shaft column, the shaft column has a first end and a second end, the knob is arranged at the first end, and the second end has a flange portion; wherein the gasket has a first opening and a second opening penetrating through, the first opening is towards the elastic member, the second opening is towards the limiting block, the aperture of the first opening is smaller than the aperture of the second opening, the knob is used to be rotated to drive the shaft column to move towards the limiting column, so that the second end abuts against the first portion of the limiting column.

10. The locking fixation device of claim 9, wherein, The knob is used to be rotated to drive the shaft column to move away from the limiting column, so that the flange portion of the second end abuts against the inner circumferential position of the first opening of the gasket.

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