Stepless adjustment operation head frame

Abstract

The utility model discloses a stepless adjustment operation headstock, which relates to the technical field of operation headstocks, and comprises a fixed arm and an adjusting arm, one end of the fixed arm is provided with a first support, the end face of the first support is rotatably connected with a double-head nail jacking piece, one end of the adjusting arm is provided with a second support, and the end face of the second support is rotatably connected with a double-head nail jacking piece. And a single-head ejector pin piece is mounted on the outer wall of the second support. By arranging the smooth adjusting arm without the rack, the adjusting arm slides in the sliding groove of the fixed arm, stepless adjustment of the distance between the adjusting arm and the fixed arm is achieved, time and labor are saved during operation, abrasion between the adjusting arm and the fixed arm is small, deformation is not prone to occurring, and the service life of the operation head frame is prolonged; when a proper distance is reached, the adjusting arm is fixed on the fixed arm through the locking mechanisms on the two sides, a double-locking structure is adopted, it is guaranteed that the surgical headstock has high firmness and stability in the using process, and surgical requirements are met.

Description

Technical Field

[0001] This utility model relates to the field of surgical headrest technology, specifically a stepless adjustable surgical headrest. Background Technology

[0002] In some neurosurgical procedures, there is often a need for stability of the patient's head or neck. Therefore, it is necessary to fix the patient's head with a surgical head frame to ensure stability during the operation.

[0003] Existing Chinese patents, such as the one published in CN213406794U entitled "A Transmissive Medical Surgical Head Frame," include a support, an angle adjustment mechanism, and a clamping mechanism. The support includes two slide rods, two connecting rods respectively sleeved at both ends of the slide rods, and two side rail clamps respectively mounted on the connecting rods. The slide rods are used to connect and move other components, serving as support members for the surgical head frame, thereby ensuring the stability of the surgical head frame.

[0004] In the aforementioned device, the distance between the fixed arm and the adjusting arm is adjusted by pulling a rack. A pin is located below the fixed arm to secure the adjusting arm. When the surgical head frame needs to be fixed to the patient's head, medical staff need to push the adjusting arm to the left to engage the rack on the adjusting arm with the groove inside the fixed arm. This operation is laborious, and if too much force is applied, the distance between the two arms may be smaller than the size of the patient's skull, potentially causing the single-headed pin on the adjusting arm to penetrate the skull to a greater depth, resulting in head injury. Furthermore, to meet fluoroscopic requirements, both the fixed arm and the adjusting arm are made of transparent material. Over time, the teeth may deform or even break due to repeated stretching, leading to a decrease in the accuracy of the surgical head frame and affecting the smooth progress of the surgery. Therefore, we propose a stepless adjustable surgical head frame to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a stepless adjustable surgical head frame to solve the problem mentioned in the background art. In the process of using the existing device, the fixed arm and the adjusting arm are adjusted by a pull pin, which is relatively laborious. Moreover, if too much force is applied, the distance between the two arms will be smaller than the size of the patient's head, which may cause the single-headed pin on the adjusting arm to penetrate the skull to a greater depth, causing damage to the patient's head and affecting the smooth progress of the surgery.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a stepless adjustable surgical head frame, comprising a fixed arm and an adjustable arm. One end of the fixed arm is provided with a first support, and a double-headed pin is rotatably connected to the end face of the first support. One end of the adjustable arm is provided with a second support, and a single-headed pin is installed on the outer wall of the second support. The fixed arm is characterized by having a transversely penetrating groove inside, and the other end of the adjustable arm is a smooth rod that extends into the groove and is slidably connected to it. Locking mechanisms are installed on both sides of the fixed arm away from the single-headed pin, and the locking mechanisms pass through the fixed arm and are connected to the adjustable arm.

[0007] Preferably, both sides of the adjusting arm are provided with L-shaped guide grooves. The locking mechanism includes a mounting base and a connecting post. The mounting base is provided with a through hole. Limiting ring pieces are provided at intervals on the inner wall of the mounting base near the fixed arm. The limiting ring pieces are integrally formed with the mounting base. The connecting post is set in the through hole of the mounting base and is located outside the limiting ring pieces. An outwardly extending locking piece is provided on the outer wall of the end of the connecting post and is located inside the limiting ring pieces. A guide rod is provided on the end of the connecting post near the locking piece. The guide rod passes through the fixed arm and extends into the interior of the L-shaped guide groove. A limiting head is provided on the outer wall of the end of the guide rod. A knob seat is installed on the end of the connecting post away from the locking piece. A knob handle is installed on the outer end face of the knob seat.

[0008] Preferably, a spring is provided between the knob seat and the limiting ring plate, and one end of the spring is fixedly connected to the limiting ring plate.

[0009] Preferably, a protrusion is provided on one side of the outer wall of the knob seat, and a limit block is provided above the outer end face of the mounting seat.

[0010] Preferably, the adjusting arm has scale lines on its outer side wall along its length.

[0011] Preferably, the fixed arm, the adjusting arm, and the locking mechanism are all made of carbon fiber material.

[0012] Preferably, a support arm is installed on the outer wall of the fixed arm, and the support arm is connected to the fixed arm through a ratchet transmission mechanism.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This utility model achieves stepless adjustment of the distance between the two by setting a smooth, toothless adjustment arm, which slides in the groove of the fixed arm. The operation is time-saving and labor-saving, and the wear between the adjustment arm and the fixed arm is small and not easily deformed, thus extending the service life of the surgical head frame. When the appropriate distance is reached, the adjustment arm is fixed to the fixed arm by the locking mechanism on both sides. The double locking structure ensures that the surgical head frame has strong firmness and stability during use, meeting the needs of surgery.

[0015] (2) By setting scale lines on the outer wall of the adjusting arm, doctors can make preliminary adjustments to the distance between the adjusting arm and the fixed arm according to the size of the patient's head, thus avoiding excessive force that could damage the patient's head. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure between the adjusting arm and the locking mechanism of this utility model;

[0018] Figure 3 This is a cross-sectional view of the connection between the adjusting arm and the locking mechanism of this utility model;

[0019] Figure 4 This utility model Figure 2 Enlarged view of a portion of point A in the middle;

[0020] In the diagram: 1. Fixed arm; 101. First support; 102. Double-headed pin; 103. Slide groove; 2. Adjusting arm; 201. Second support; 202. Single-headed pin; 203. L-shaped guide groove; 204. Scale line; 3. Support arm; 4. Ratchet transmission mechanism; 5. Locking mechanism; 501. Mounting base; 5011. Limiting block; 502. Limiting ring; 503. Connecting post; 504. Knob seat; 5041. Protrusion; 505. Knob handle; 506. Guide rod; 507. Positioning piece; 508. Limiting head; 509. Spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figure 1-4This utility model provides an embodiment of a stepless adjustable surgical head frame, comprising a fixed arm 1 and an adjustable arm 2. One end of the fixed arm 1 is provided with a first support 101, and a double-headed pin 102 is rotatably connected to the end face of the first support 101. One end of the adjustable arm 2 is provided with a second support 201, and a single-headed pin 202 is installed on the outer wall of the second support 201. The fixed arm 1 has a transversely penetrating groove 103 inside, and the other end of the adjustable arm 2... The end is a smooth rod that extends into the interior of the slide groove 103 and is slidably connected to the slide groove 103. Locking mechanisms 5 are installed on both sides of the fixed arm 1 at the end away from the single-headed ejector pin 202. The locking mechanisms 5 pass through the fixed arm 1 and connect to the adjusting arm 2. L-shaped guide grooves 203 are provided on both sides of the adjusting arm 2. The locking mechanism 5 includes a mounting base 501 and a connecting pin 503. The mounting base 501 has a through hole, and the inner wall of the mounting base 501 is spaced apart at one end near the fixed arm 1. A limiting ring 502 is integrally formed with the mounting base 501. A connecting pile 503 is disposed in the through hole of the mounting base 501 and located outside the limiting ring 502. A locking piece 507 extending outward is provided on the outer wall of the end of the connecting pile 503 and is located inside the limiting ring 502. A guide rod 506 is provided at one end of the connecting pile 503 near the locking piece 507 and extends through the fixing arm 1 to the L-shaped guide groove 203. Inside, a limit head 508 is provided on the outer wall of the end of the guide rod 506. A knob seat 504 is installed at the end of the connecting post 503 away from the locking piece 507. A knob handle 505 is installed on the outer end face of the knob seat 504. A spring 509 is provided between the knob seat 504 and the limit ring piece 502, and one end of the spring 509 is fixedly connected to the limit ring piece 502. A support arm 3 is installed on the outer wall of the fixed arm 1. The support arm 3 is connected to the support arm 3 through a ratchet transmission mechanism 4.

[0023] When adjusting the distance between the fixed arm 1 and the adjusting arm 2, the adjusting arm 2 can be pulled directly to slide along the slide groove 103 inside the fixed arm 1, achieving stepless adjustment. The operation is simple and labor-saving. Moreover, the adjusting arm and the fixed arm slide in smooth contact, resulting in less wear and deformation between them, thus extending the service life of the surgical head frame. Once the appropriate distance is reached, first press the knob handle 505 on one side of the locking mechanism 5 and rotate it 90 degrees clockwise. During this process, the guide rod 506 at the end of the connecting post 503 on the inner side of the knob seat 504 extends into the L-shaped guide groove 203 on the side of the adjusting arm 2 and rotates clockwise under the action of rotational force, so that the limiting head 508 at the end of the guide rod 506 is engaged in the bend of the L-shaped guide groove 203. At this time, the spring 509 between the knob seat 504 and the limiting ring 502 causes the limiting head 508 to press tightly against the L-shaped guide groove 203 under the action of elastic force, thereby locking and fixing the adjusting arm 2 and the side wall of the fixed arm 1 through the locking mechanism 5. Then repeat the above operation to lock and fix the adjusting arm 2 and the other side wall of the fixed arm 1. Double locking ensures the stable fixing of the adjusting arm 2 and the fixed arm 1.

[0024] Please see Figure 4 A protrusion 5041 is provided on one side of the outer wall of the knob seat 504, and a limit block 5011 is provided above the outer end face of the mounting seat 501. When the knob seat 504 is rotated clockwise to 90 degrees, the protrusion 5041 can contact the limit block 5011 on the end face of the mounting seat 501, thereby playing a limiting role and preventing the rotation angle from being too large.

[0025] Please see Figure 2 The adjusting arm 2 has a scale line 204 on its outer side wall along its length. When the doctor receives this surgical head frame, he first measures the size of the patient's head, and then adjusts the distance between the fixed arm 1 and the adjusting arm 2 using the scale line 204 to achieve a rough adjustment of the distance between the two. Then, the surgical head frame is placed on the patient's head. One hand holds the fixed arm 1, and the other hand makes a fine adjustment to move the adjusting arm 2 closer to the fixed arm 1 to a suitable distance. The locking mechanism 5 is then used to fix it securely. Next, the single-headed pin 202 and double-headed pin 102 on both sides are adjusted to fix the surgical head frame stably on the patient's head. The scale line 204 makes it easy for the doctor to make a preliminary adjustment of the distance between the adjusting arm and the fixed arm according to the size of the patient's head, avoiding excessive force that could damage the patient's head.

[0026] Furthermore, both the fixed arm 1 and the adjusting arm 2 are made of carbon fiber, and all other components in the locking mechanism 5 except for the spring are also made of carbon fiber. The carbon fiber material allows the surgical head frame, except for the spring, to be fluoroscopically visualized during surgery, resulting in clear images and eliminating the interference of the surgical head frame on the skull.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A continuously adjustable surgical head holder, comprising a fixed arm (1) and an adjusting arm (2), one end of the fixed arm (1) is provided with a first support (101), and the end surface of the first support (101) is rotationally connected with a double-end top pin member (102), one end of the adjusting arm (2) is provided with a second support (201), and a single-end top pin member (202) is installed on the outer wall of the second support (201), characterized in that: The inside of the fixed arm (1) is provided with a transverse through sliding groove (103), the other end of the adjusting arm (2) is a smooth rod, and extends into the inside of the sliding groove (103) and is in sliding connection with the sliding groove (103), the fixed arm (1) is provided with a locking mechanism (5) on both sides away from the single-end top pin (202) end, and the locking mechanism (5) is connected with the adjusting arm (2) through the fixed arm (1).

2. A pantograph adjustable surgical headstock as claimed in claim 1, wherein: The adjusting arm (2) is provided with an L-shaped guide groove (203) on both sides, the locking mechanism (5) comprises a mounting seat (501) and a connecting pile (503), the mounting seat (501) is provided with a through hole, the inner wall of the mounting seat (501) is provided with a limiting ring piece (502) at an end close to the fixed arm (1), and the limiting ring piece (502) is formed integrally with the mounting seat (501), the connecting pile (503) is arranged in the through hole of the mounting seat (501) and located outside the limiting ring piece (502), the outer wall of the end of the connecting pile (503) is provided with an outwardly extending clamping piece (507), and the clamping piece (507) is located inside the limiting ring piece (502), the connecting pile (503) is provided with a guide rod (506) at an end close to the clamping piece (507), and the guide rod (506) extends through the fixed arm (1) to the inside of the L-shaped guide groove (203), the outer wall of the end of the guide rod (506) is provided with a limiting head (508), the connecting pile (503) is provided with a knob seat (504) at an end away from the clamping piece (507), and the outer end face of the knob seat (504) is provided with a knob handle (505).

3. A surgical headstock of the continuously variable adjustment type according to claim 2, characterized in that: The spring (509) is arranged between the knob seat (504) and the limiting ring piece (502), and one end of the spring (509) is fixedly connected with the limiting ring piece (502).

4. A head support according to claim 2, wherein: One side of the outer side wall of the knob seat (504) is provided with a protruding block (5041), and the upper side of the outer end face of the mounting seat (501) is provided with a limiting block (5011).

5. A head support according to claim 1, wherein: The outside wall of the adjusting arm (2) in the length direction is provided with a scale line (204).

6. A head support according to claim 1, wherein: The fixed arm (1), the adjusting arm (2) and the locking mechanism (5) are all made of carbon fiber material.

7. A head support according to claim 1, wherein: The outer wall of the fixed arm (1) is provided with a supporting arm (3), and the supporting arm (3) is connected with the supporting arm (3) through the ratchet gear mechanism (4).

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