A headrest connection structure for neurosurgery

Abstract

The present invention discloses a headrest connection structure for neurosurgery, which includes a first support arm and a second support arm that are rotatably connected. A first ball hinge is provided on the first support arm, and a second ball hinge is provided on the second support arm. A first locking rod is slidably provided on the first support arm, and a second locking rod is slidably provided on the second support arm. The structure further includes a locking mechanism, which includes a locking knob that passes through the ends of the first support arm and the second support arm at the same time. The locking knob has an abutting portion. For the headrest connection structure for neurosurgery provided by the present invention, the abutting portion on the locking knob will simultaneously abut against the first locking rod and the second locking rod, and the first locking rod and the second locking rod will abut against the first ball hinge and the second ball hinge to complete the locking of the first ball hinge and the second ball hinge. The abutting portion on the locking knob will simultaneously abut against the two locking rods to lock the first ball hinge and the second ball hinge at the same time.

Description

Technical Field

[0001] The present invention relates to the field of surgical instruments, and more particularly to a head frame connection structure for neurosurgical operations. Background Art

[0002] With the progress of science and medicine, the application of surgical robots for preoperative positioning, intraoperative position adjustment, and intraoperative instrument introduction in surgical operations is becoming more and more widespread and popular. Surgical robots include robotic arms, surgical navigation software, optical tracking and positioning devices, special instrument carts, positioning markers, and probes. Among them, the special instrument cart is the main body of the product, carrying many components such as robotic arms and computers, as well as connecting cables. A head frame connection system is provided on the special instrument cart, which can connect the fixed special instrument cart to the surgical head frame to assist in stabilizing the relative position between the robotic arm and the patient's skull.

[0003] As Figure 1 shown, the head frame connection system in the prior art includes a first support arm 1' and a second support arm 2' that are rotatably connected. The first support arm 1' and the second support arm 2' are rotatably connected by a locking knob 5'. A first ball hinge 3' is provided on the first support arm 1', and a second ball hinge 3' is provided on the second support arm 2'. Thus, the head frame connection system has 3 degrees of freedom, including 2 degrees of freedom composed of ball hinges and 1 degree of freedom composed of rotation, which can fully adapt to changes in the height and position of the head frame.

[0004] After the ball hinge completes the degrees of freedom required for the operation, it also needs to be fixed. In the prior art, there are two methods for fixing the ball hinge. One is to rely on the friction force of the ball hinge itself for fixation, but a large friction force is required at this time. The other is to add a locking mechanism, and a locking mechanism is required for each ball hinge, and the operation is relatively cumbersome. Summary of the Invention

[0005] The purpose of the present invention is to provide a head frame connection structure for neurosurgical operations to solve the above deficiencies in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A headrest connection structure for neurosurgery, comprising a first support arm and a second support arm that are rotatably connected. A first ball hinge is provided on the first support arm, and a second ball hinge is provided on the second support arm. A first locking rod is slidably provided on the first support arm, and a second locking rod is slidably provided on the second support arm. It further includes a locking mechanism, which includes a locking knob that passes through the ends of the first support arm and the second support arm at the same time. The locking knob has an abutting portion. When the locking knob locks the first support arm and the second support arm, the abutting portion abuts the first locking rod to lock the first ball hinge, and the abutting portion abuts the second locking rod to lock the second ball hinge.

[0008] For the above-mentioned headrest connection structure for neurosurgery, the first support arm includes a first support section and a first connection section, and the second support arm includes a second support section and a second connection section. The second ball hinge includes a second ball hinge seat and a second inner sphere rotatably connected to the second ball hinge seat.

[0009] For the above-mentioned headrest connection structure for neurosurgery, a first groove is provided on the first ball hinge seat, and a second groove is provided on the second ball hinge seat. The first locking rod abuts the first ball hinge seat through the first groove, and the second locking rod abuts the second ball hinge seat through the second groove.

[0010] For the above-mentioned headrest connection structure for neurosurgery, the abutting portion includes a first abutting block and a second abutting block. The first abutting block is used to abut the first locking rod, and the second abutting block is used to abut the second locking rod.

[0011] For the above-mentioned headrest connection structure for neurosurgery, both the first abutting block and the second abutting block include a frustum and a cylinder connected to each other. The axial length of the frustum of the second abutting block is greater than the axial length of the frustum of the first abutting block.

[0012] For the above-mentioned headrest connection structure for neurosurgery, a first circular groove is circumferentially and arrayedly provided on the first abutting block, and a second circular groove is circumferentially and arrayedly provided on the second abutting block. One end of the first locking rod abuts against the first circular groove, and one end of the second locking rod abuts against the second circular groove.

[0013] For the above-mentioned headrest connection structure for neurosurgery, the locking knob includes a locking section and an abutting section. The locking section is inserted into the abutting section, and there is a gap at the insertion joint of the locking section and the abutting section.

[0014] The above headrest connection structure for neurosurgery further includes a locking mechanism, and the connection mechanism is used to enable the abutting section and the locking section to move synchronously axially while being radially offsettable.

[0015] For the above headrest connection structure for neurosurgery, the connection mechanism includes a radially extending portion provided on the convex portion and a groove body provided on the abutting section, and the radially extending portion extends into the groove body.

[0016] In the above technical solution, for a headrest connection structure for neurosurgery provided by the present invention, during the locking stroke of the locking knob, the abutting portion on the locking knob will abut against the first locking rod and the second locking rod. Thus, the first locking rod and the second locking rod will move. At this time, the first locking rod and the second locking rod will abut against the first ball hinge and the second ball hinge to complete the locking of the first ball hinge and the second ball hinge. Thus, the abutting portion on the locking knob will abut against the two locking rods simultaneously to lock the first ball hinge and the second ball hinge simultaneously. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of a headrest connection structure for neurosurgery provided by the prior art;

[0019] Figure 2 It is a schematic structural diagram of a headrest connection structure for neurosurgery according to an embodiment of the present invention;

[0020] Figure 3 It is a partial cross-sectional view of the first support arm provided by an embodiment of the present invention;

[0021] Figure 4 It is a cross-sectional view of the locking knob provided by an embodiment of the present invention;

[0022] Figure 5 It is a schematic structural diagram of a locking knob provided by another embodiment of the present invention;

[0023] Figure 6 It is a schematic structural diagram of a locking knob provided by yet another embodiment of the present invention;

[0024] Figure 7 It is a top view of the abutting section of the locking knob provided by yet another embodiment of the present invention;

[0025] Figure 8Schematic diagram of the locking section structure of the locking knob provided for another invention embodiment.

[0026] Explanation of reference numerals:

[0027] Prior art: 1', first support arm; 2', second support arm; 3', first ball hinge; 4', second ball hinge; 5', locking knob

[0028] The present invention:

[0029] 1, first support arm; 1.1, first connecting section; 1.2, first support section; 2, second support arm; 2.1, second connecting section; 2.2, second support section; 3, first ball hinge; 3.1, first ball hinge seat; 3.2, first inner sphere; 4, second ball hinge; 4.1, second ball hinge seat; 4.2, second inner sphere; 7, locking knob; 3.11, first groove; 5, first locking rod; 6, second locking rod; 8, abutting portion; 8.1, first abutting block; 8.11, first circular groove; 8.2, second abutting block; 8.22, second circular groove; 9, locking section; 9.1, protruding portion; 10, abutting section; 10.1, groove; 11, radially extending portion. Detailed implementation manners

[0030] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Referring to Figure 2-8 , an embodiment of the present invention provides a head frame connection structure for neurosurgical operations, including a first support arm 1 and a second support arm 2 that are rotatably connected. A first ball hinge 3 is provided on the first support arm 1, a second ball hinge 4 is provided on the second support arm 2, a first locking rod 5 is slidably provided on the first support arm 1, and a second locking rod 6 is slidably provided on the second support arm 2; a locking mechanism is further included. The locking mechanism includes a locking knob 7 that penetrates through the ends of the first support arm 1 and the second support arm 2 at the same time. The locking knob 7 has an abutting portion 8. When the locking knob 7 locks the first support arm 1 and the second support arm 2, at the same time, the abutting portion 8 abuts against the first locking rod 5 to lock the first ball hinge 3, and the abutting portion 8 abuts against the second locking rod 6 to lock the second ball hinge 4.

[0032] Specifically, the head frame connection structure for neurosurgery is used to connect a fixed base and a special instrument cart during neurosurgery. The fixed base is such as a fixed shell of a surgical device. The ball of the first ball hinge 3 (the first inner ball 3.2) is fixed to the fixed base through a rod, and the ball of the second ball hinge 4 (the second inner ball 4.2) is fixed to the special instrument cart through a rod, so that the special instrument cart can be moved and fixed within a certain range relative to the fixed base. This is a prior art and will not be described in detail. The first support arm 1 includes a first support segment 1.2 and a first connecting segment 1.1, and the second support arm 2 includes a second support segment 2.2 and a second connecting segment 2.1. The first connecting segment 1.1 and the second connecting section 2.1 are rotatably connected, a first ball hinge 3 is arranged on the end of the first supporting section 1.2 away from the first connecting section 1.1, the first ball hinge 3 includes a first ball hinge seat 3.1 and a first inner sphere 3.2 rotatably connected to the first ball hinge seat 3.1, the first inner sphere 3.2 is fixedly connected to the fixed base by a connecting rod, a second ball hinge 4 is arranged on the second supporting section 2.2, the second ball hinge 4 includes a second ball hinge seat 4.1 and a second inner sphere 4.2 rotatably connected to the second ball hinge seat 4.1, the second inner sphere 4.2 is fixed to the special instrument vehicle by another connecting rod, the ball hinge and its application are prior art, Without further elaboration, a structure is formed in which the first connecting section 1.1, the first supporting section 1.2, the first ball joint seat 3.1 and the first inner sphere 3.2 are connected in sequence. A first locking rod 5 is slidably provided on the first supporting arm 1. Preferably, the first locking rod 5 slides axially inside the first supporting section 1.2, one end of the first locking rod 5 is located on the first connecting section 1.1, and the other end of the first locking rod 5 is located on the first supporting section 1.2. A second locking rod 6 is slidably provided on the second supporting arm 2. Preferably, the second locking rod 6 slides axially inside the second supporting section 2.2, and one end of the second locking rod 6 is located on the second The second locking rod 6 is located on the connecting section 2.1, and the other end of the second locking rod 6 is located on the second supporting section 2.2, and also includes a locking mechanism, which includes a locking knob 7 that is simultaneously penetrated by the ends of the first supporting arm 1 and the second supporting arm 2, that is, the locking knob 7 is penetrated by the first connecting section 1.1 and the second connecting section 2.1. Preferably, a threaded hole is provided on the second connecting section 2.1, and an external thread is provided on the end of the locking knob 7 (the end close to the second supporting arm 2), and the handle end of the locking knob 7 is located on one side of the first connecting section 1.1, so that the external thread and the threaded hole can be threadedly connected to make the handle end, the first connecting section 1.1 and the second connecting section 2.1. Make contact in sequence, and thus the first support arm 1 and the second support arm 2 can be locked. The locking knob 7 sequentially includes a handle end, a smooth rod section, and an external thread. A contact portion 8 is provided on the smooth rod section. Preferably, the contact portion 8 is block-shaped, and its cross-section is fan-shaped. The fan shape facilitates gradual contact with the first locking rod 5 and the second locking rod 6. A first groove 3.11 communicating with the internal through hole of the first support arm 1 is provided on the first ball hinge seat 3.1, and a second groove communicating with the internal through hole of the second support arm 2 is provided on the second ball hinge seat 4.1. During the locking stroke of the locking knob 7, that is, the axial movement stroke of the locking knob 7, the contact portion 8 has a first state and a second state. In the first state, the contact portion 8 does not contact the first locking rod 5 and the second locking rod 6. In the second state, the contact portion 8 contacts the first locking rod 5 and the second locking rod 6. At this time, the first locking rod 5 and the second locking rod 6 will move axially upward (in the direction close to the first inner sphere 3.2 and the second inner sphere 4.2), and thus pass through the first groove 3.11 and the second groove and contact the outer walls of the first inner sphere 3.2 and the second inner sphere 4.2, so as to lock the first ball hinge 3 and the second ball hinge 4. In this way, the contact portion 8 on the locking knob 7 will contact both locking rods simultaneously.

[0033] A head frame connection structure for neurosurgical operations provided by the present invention. During the locking stroke of the locking knob 7, the contact portion 8 on the locking knob 7 contacts the first locking rod 5 and the second locking rod 6. Thus, the first locking rod 5 and the second locking rod 6 will move. At this time, the first locking rod 5 and the second locking rod 6 will contact the first ball hinge 3 and the second ball hinge 4 to complete the locking of the first ball hinge 3 and the second ball hinge 4. In this way, the contact portion 8 on the locking knob 7 contacts both locking rods to lock the first ball hinge 3 and the second ball hinge 4 simultaneously.

[0034] In another embodiment provided by the present invention, the abutting portion 8 includes a first abutting block 8.1 and a second abutting block 8.2, and the first abutting block 8.1 and the second abutting block 8.2 are integrally formed on the locking knob 7. Preferably, both the first abutting block 8.1 and the second abutting block 8.2 include a connected frustum and a cylinder. However, the axial length of the frustum of the second abutting block 8.2 is greater than the axial length of the frustum of the first abutting block 8.1. One end of its frustum is close to the external thread on the locking knob 7. During the locking stroke of the locking knob 7, the abutting portion 8 has a first state and a second state. In the first state, neither the first abutting block 8.1 nor the second abutting block 8.2 abuts against the first locking rod 5 and the second locking rod 6. The second state includes a first sub-state, a second sub-state, and a third sub-state. In the first sub-state, due to the fact that the axial length of the frustum of the second abutting block 8.2 is greater than the axial length of the frustum of the first abutting block 8.1, the second locking rod 6 abuts against the frustum of the second abutting block 8.2, and at this time the first abutting block 8.1 does not abut against the first locking rod 5. In the second sub-state, the second locking rod 6 abuts against the cylinder of the second abutting block 8.2 to maintain the abutment of the first locking rod 5. At this time, the first locking rod 5 also abuts against the frustum of the first abutting block 8.1. In the third sub-state, the first locking rod 5 abuts against the cylinder of the first abutting block 8.1, and the second locking rod 6 abuts against the cylinder of the second abutting block 8.2. The purpose of setting the abutting portion 8 as the first abutting block 8.1 and the second abutting block 8.2 in this way is to be able to lock the second locking rod 6 and the first locking rod 5 in sequence by relying on the first abutting block 8.1 and the second abutting block 8.2.

[0035] Furthermore, a first circular groove 8.11 is circumferentially arrayed on the first abutting block 8.1, and a second circular groove 8.22 is circumferentially arrayed on the second abutting block 8.2. The first circular groove 8.11 is arranged on the cylinder of the first abutting block 8.1, and the second circular groove 8.22 is arranged on the cylinder of the second abutting block 8.2. Preferably, the shapes of the first circular groove 8.11 and the second circular groove 8.22 are circular grooves. During the locking stroke of the locking knob 7, most likely, the second locking rod 6 will enter and abut within the second circular groove 8.22, and the first locking rod 5 will enter and abut within the first circular groove 8.11. In this way, the first locking rod 5 and the second locking rod 6 lock the locking knob 7 in the reverse direction, preventing it from axially moving and loosening by itself.

[0036] Furthermore, in order to prevent the first locking rod 5 and the second locking rod 6 from moving downward when entering the first circular groove 8.11 and the second circular groove 8.22, which may affect the locking of the first ball hinge 3 and the second ball hinge 4, the upper ends of the first locking rod 5 and the second locking rod 6 (the ends close to the first inner sphere 3.2 and the second inner sphere 4.2) are provided with an elastic structure. That is, the axial lengths of the first locking rod 5 and the second locking rod 6 are greater than the lengths of the first groove 3.11 and the second groove. When the first locking rod 5 enters the first groove 3.11 as a whole, its upper end will be squeezed and abutted against the outer wall of the first inner sphere 3.2. When the second locking rod 6 enters the second groove as a whole, its upper end will be squeezed and abutted against the outer wall of the second inner sphere 4.2. In this way, the first locking rod 5 and the second locking rod 6 can still maintain the locking of the first ball hinge 3 and the second ball hinge 4 when axially moving.

[0037] In another embodiment provided by the present invention, the locking knob 7 includes a locking section 9 and an abutting section 10 with their ends inserted into each other. Among them, the abutting section 10 corresponds to the handle end and the smooth rod section, and the locking section 9 corresponds to the external thread. The locking section 9 is provided with an external thread for locking the first support arm 1 and the second support arm 2. The handle end, the first abutting block 8.1 and the second abutting block 8.2 are located on the abutting section 10. The locking section 9 is inserted into the abutting section 10, and there is a gap at the insertion part of the locking section 9 and the abutting section 10. The abutting section 10 is provided with a non-rotating body groove 10.1. Preferably, the shape of the groove 10.1 is a cuboid. The locking section 9 is provided with a protrusion 9.1. Preferably, the protrusion 9.1 is a cuboid. The radial dimension of the groove 10.1 is greater than the radial dimension of the protrusion 9.1, and the two are in clearance fit. When the locking section 9 is inserted into the abutting section 10, the protrusion 9.1 is inserted into the groove 10.1, that is, the protrusion 9.1 is located in the groove 10.1. In this way, when the first ball hinge 3 and the second ball hinge 4 need to be unlocked, the abutting section 10 can be manually moved downward along the radial direction of the abutting section 10 (away from the first support arm 5 and the second support arm 6). At this time, the first locking rod 5 will disengage from the first circular groove 8.11, and the second locking rod 6 will disengage from the second circular groove 8.22. That is, the unlocking of the first locking rod 5 and the second locking rod 6 is completed in this way. Since the radial dimension of the groove 10.1 is greater than the radial dimension of the protrusion 9.1, the locking section 9 does not need to move downward synchronously during this process, but then rotating the corresponding abutting section 10 can still drive the locking section 9 to rotate.

[0038] In this embodiment, a connecting mechanism is further included. The connecting mechanism is used to enable the abutting section 10 and the locking section 9 to move axially synchronously while being radially offsettable. The connecting mechanism includes a radially extending portion 11 provided on the protruding portion 9.1 and a groove body provided on the abutting section 10. Preferably, the shape of the radially extending portion is an annular structure, and the shape of the groove body is an annular groove corresponding to the radially extending portion. In this way, when the radially extending portion 11 extends into the groove body to connect the abutting section 10 and the locking section 9, axial synchronization is achieved. Obviously, the abutting section 10 and the locking section 9 still need to rotate synchronously. At this time, the radially extending portion and the annular groove can be arranged to have a structure with rotational drive cooperation, such as a spline and keyway structure, or an annular wavy surface and wavy groove, or protrusions and grooves are arranged on the radially extending portion and the annular groove for cooperation, so as to achieve rotational drive. Correspondingly, in order to adapt to the downward movement of the abutting section 10, clearance fits are also required between various mating structures.

[0039] In an alternative embodiment, the groove 10.1 and the protruding portion 9.1 can also be directly mated with splines, and the above-mentioned clearance is reserved between the spline and the keyway. Only axial drive is achieved for the radially extending portion and the annular groove. The rotational drive and axial drive cooperation are both prior arts and will not be elaborated.

[0040] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A head frame connection structure for neurosurgery, comprising a first support arm and a second support arm that are rotatably connected. A first ball hinge is provided on the first support arm, and a second ball hinge is provided on the second support arm. It is characterized in that, A first locking rod is slidably arranged on the first support arm, and a second locking rod is slidably arranged on the second support arm; It further includes a locking mechanism. The locking mechanism includes a locking knob that penetrates through the ends of the first support arm and the second support arm at the same time. The locking knob has an abutting portion. When the locking knob locks the first support arm and the second support arm, at the same time, the abutting portion abuts against the first locking rod to lock the first ball hinge, and the abutting portion abuts against the second locking rod to lock the second ball hinge. The abutting portion includes a first abutting block and a second abutting block. The first abutting block is used to abut against the first locking rod, and the second abutting block is used to abut against the second locking rod. Both the first abutting block and the second abutting block include a frustum and a cylinder connected to each other. The axial length of the frustum of the second abutting block is greater than the axial length of the frustum of the first abutting block. A first circular groove is circumferentially and arrayedly arranged on the first abutting block, and a second circular groove is circumferentially and arrayedly arranged on the second abutting block. One end of the first locking rod abuts against the first circular groove, and one end of the second locking rod abuts against the second circular groove.

2. The headrest connection structure for neurosurgical operations according to claim 1, characterized in that, The first support arm includes a first support section and a first connecting section, and the second support arm includes a second support section and a second connecting section. The second ball hinge includes a second ball hinge seat and a second inner sphere rotatably connected to the second ball hinge seat.

3. The headrest connection structure for neurosurgical operations according to claim 1, wherein, A first groove is arranged on the first ball hinge seat, and a second groove is arranged on the second ball hinge seat. The first locking rod abuts against the first ball hinge seat through the first groove, and the second locking rod abuts against the second ball hinge seat through the second groove.

4. The head frame connection structure for neurosurgical operations according to claim 1, wherein, The locking knob includes a locking section and an abutting section. The abutting portion is located on the abutting section. The locking section is inserted into the abutting section, and there is a gap at the insertion joint of the locking section and the abutting section.

5. The headframe connection structure for neurosurgical operations according to claim 4, characterized in that, A groove is arranged on the abutting section, and a protruding portion is arranged on the locking section. The radial dimension of the groove is greater than the radial dimension of the protruding portion.

6. The head frame connection structure for neurosurgical operations according to claim 5, characterized in that, It further includes a connecting mechanism, and the connecting mechanism is used to enable the abutting section and the locking section to move axially synchronously while being radially offsettable.

7. The headrest connection structure for neurosurgical operations according to claim 6, characterized in that, The connecting mechanism includes a radially extending portion arranged on the protruding portion and a groove body arranged on the abutting section. The radially extending portion extends into the groove body.

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