CN112790875B - A multi-directional adjustable head fixation device - Google Patents

Abstract

The invention discloses a multidirectional adjustable head fixation device, which comprises a head support and a linkage assembly capable of multidirectional adjustment. The head support is arranged at the end of the operating bed through the linkage assembly, and the linkage assembly includes a second fixed end, the first fixed end, the telescopic rod and the connecting plate The connecting plate is arranged in an arc shape, a slider is arranged on the inner arc surface of the connecting plate, and a chute is arranged on the outer bottom of the head support, and the length direction of the chute is perpendicular to the telescopic rod The length direction of the slider is set, the connecting plate is set on the bottom of the headrest through the slider and the chute, the slider slides in the chute, and the top of the slider is provided with an anti-off block for preventing the slider from falling out of the chute. The thickness of the block is greater than the thickness of the slider. The present invention can cooperate with medical personnel to effectively control multiple angles of fixing the patient's head on the operating bed, which facilitates better exposure of the patient's neck, facilitates surgical operations, and saves surgical time.

Description

A multi-directional adjustable head fixation device

technical field

The invention relates to the technical field of medical devices, in particular to a multi-directional adjustable head fixation device.

Background technique

Arterial thrombectomy is an effective method for the treatment of acute large vessel occlusion stroke, and it is also a delicate and minimally invasive surgery. The diameter of the main trunk and branches of the middle cerebral artery is about 1-2mm. The twisting of the patient's head during the operation will seriously affect the display of the cerebral blood vessels, increase the risk of the operation, and prolong the operation time. Therefore, the fixation of the head is particularly important.

In current technology, when performing arterial thrombectomy, the patient lies on the operating table, and the medical staff fixes the patient's head with a strap, and spreads an air bag or a sponge pillow on the back of the patient's neck to support the patient's head.

The above operation also has the following defects at present:

1. The medical staff fix the patient's head with the hospital bed with straps. The straps are easy to fall off and are not very stable. The patient's head is easy to move during the operation, causing medical accidents, and the medical staff need to pay more attention to the patient's head at any time. , increase the workload of medical staff.

2. During arterial thrombectomy, it is necessary to adjust the patient's head according to the patient's specific operating position. If the airbag is simply placed on the back of the patient's neck, its height is difficult to fine-tune, and because the airbag gas is easy to move, If the patient is unconscious or has mania, the difficulty and risk of the operation will be increased.

3. At the same time, since the two sides of the patient's head are not restricted, if the patient's head swings during DSA angiography, it will easily affect the operation and increase the difficulty and risk of the operation.

Contents of the invention

The purpose of the present invention is to provide a multi-directional adjustable head fixation device, which can effectively control the fixation of the patient's head at multiple angles on the operating bed during the operation with the medical staff, so as to facilitate better exposure of the patient's neck. It is convenient for operation and saves operation time.

In order to achieve the purpose of the above invention, the present invention adopts the following technical solutions: a multi-directional adjustable head fixation device, including a head support and a multi-directional adjustable linkage assembly, the head support is arranged at the end of the operating bed through the linkage assembly , the linkage assembly includes a second fixed end, a first fixed end, a telescopic rod and a connecting plate connected in sequence;

- the second fixed end is arranged at the end of the operating bed, and the second fixed end can rotate in a horizontal direction relative to the operating bed;

- One end of the first fixed end is rotatably connected to the second fixed end, the first fixed end rotates in the vertical direction, and the other end of the first fixed end is provided with a through slot for connecting the telescopic rod;

- One end of the telescopic rod is inserted into the through groove of the first fixed end, and the other end of the telescopic rod is connected to the connecting plate;

- The connecting plate is fixed on the end of the telescopic rod away from the first fixed end, the connecting plate is arranged in an arc shape, the inner arc surface of the connecting plate is provided with a slider, the outer bottom of the headrest is provided with a chute, and the length direction of the chute is vertical Set in the length direction of the telescopic rod, the connecting plate is set on the bottom of the headrest through the slider and the chute, the slider slides in the chute, and the top of the slider is provided with an anti-off block for preventing the slider from falling out of the chute , the thickness of the anti-off block is greater than the thickness of the slider.

Compared with the prior art, the multidirectional adjustable head immobilization device adopting the above technical solution has the following beneficial effects:

1. Using the multidirectional adjustable head immobilization device of the present invention, the head rest replaces traditional pillows or airbags, allowing the patient's head to present multiple angles, which is convenient for surgery and multi-angle angiography.

2. The headrest of the present invention ensures that the headrest can perform multi-angle and all-round rotation relative to the operating bed by sequentially connecting the first fixed end, the second fixed end, the telescopic rod and the connecting plate. After the patient lies on the operating bed, the The head is placed in the headrest, and the medical staff can quickly and conveniently adjust the headrest to various angles according to the actual operation or clinical needs, without the need for the patient to control the neck muscles to adjust, which improves the operating efficiency and the patient's treatment experience.

Preferably, it also includes a positioning block and a first knob, a slot is provided on the inner arc surface of the connecting plate in contact with the headrest, a through hole is provided at the bottom of the slot, the positioning block is located in the slot, and the first knob passes through the slot. Connected to the bottom of the locking block through the through hole, the first knob can rotate relative to the locking block; the outer bottom of the head support is provided with a number of locking slots, the locking slots are evenly arranged along the length of the chute, and the inside of the through hole is connected with the The outer wall of the first knob is screwed together, and the block can move away from or approach the slot under the control of the first knob.

The medical personnel control the first knob under the connection plate with one hand, adjust the distance between the block and the slot, so that the headrest can rotate relative to the connection plate, or fix the headrest on the connection plate; hold the headrest with the other hand, Adjust the headrest to an appropriate position, and then tighten the first knob to fix the headrest. Medical staff can operate with one hand, and the operation is convenient and fast.

Preferably, it also includes a first adjustment mechanism for adjusting the rotation angle between the first fixed end and the second fixed end; the first adjustment mechanism includes an adjustment rod, a gear-shaped adjustment wheel and a fixed seat, and one end of the adjustment rod Hinged with the bottom of the connecting plate, the surface of the other end of the adjustment rod is provided with a rack, the fixed seat is fixed on the bottom or the bottom surface of the operating bed, the fixed seat is provided with a rocker cover, the rocker cover is hinged with the fixed seat, and the rocker cover A through hole is arranged on the top, and the adjusting wheel is rotatably arranged in the through hole, and one end of the adjusting rod provided with a rack passes through the through hole, and the rack on the adjusting rod meshes with the adjusting wheel.

Through the mutual cooperation of the adjusting rod and the adjusting wheel, the angle change of the headrest in the vertical direction can be controlled, and further the function of supporting the headrest can be played to ensure the stability of the headrest during multi-angle adjustment.

Preferably, it also includes an adjustment handle, the adjustment handle is arranged on the outside of the rocker sleeve, one end of the adjustment handle passes through the rocker sleeve and is fixed to the adjustment wheel, when the adjustment handle rotates relative to the rocker sleeve, it drives the adjustment wheel in the rocker sleeve to rotate .

The adjustment wheel can be rotated more conveniently through the external adjustment handle, which is convenient for medical staff to use and adjust.

Preferably, it also includes a second adjustment mechanism for adjusting the distance between the first fixed end and the headrest, the second adjustment mechanism includes a second knob and a stopper connected to the second knob, and the second knob is arranged on The first fixed end faces away from the side of the operating bed, and the limiter is arranged inside the second fixed end; the telescopic rod is provided with a number of limit grooves evenly arranged, and the end of the limiter is driven by the second knob The bottom can be snapped into the limit slot to limit the movement of the telescopic rod relative to the first fixed end.

Preferably, the second fixed end is provided with a connecting piece, the first fixed end is rotatably arranged on the connecting piece, the operating bed is provided with a fixing groove for fixing the second fixed end, and the second fixed end and the fixing groove are connected by a third knob. Control connection.

Preferably, the inner surface of the headrest for placing the patient's head is provided with a padding pad, and the filling pad is located at the position where the upper ears of the patient's head on both sides are in contact with the inner side of the headrest.

Preferably, there are two slide blocks on the connecting plate, two slide slots on the head support, two slide blocks and two slide slots are set correspondingly, and the slide blocks are respectively arranged on both sides of the slot, and the slide slots The grooves are arranged parallel to each other, and the two sliding grooves are respectively arranged on both sides of the card groove.

Preferably, the headrest is provided with a strap for preventing the patient's head from detaching from the headrest.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of a multi-directional adjustable head restraint device according to the present invention.

Fig. 2 is a structural schematic diagram of another angle of the multi-directional adjustable head restraint device in the embodiment.

FIG. 3 is an enlarged schematic view of point A in FIG. 1 .

FIG. 4 is an enlarged schematic view of point B in FIG. 2 .

Fig. 5 is a side view of the multi-directional adjustable head restraint device in the embodiment.

Fig. 6 is a structural schematic diagram of the head rest and the adjustment mechanism in the embodiment.

Fig. 7 is a structural schematic diagram of the headrest in the embodiment.

Fig. 8 is a schematic structural view of the embodiment when the headrest is fixed on the operating bed.

Fig. 9 is an exploded schematic view of the embodiment when the head rest is fixed on the operating bed.

Fig. 10 is a top view of the multi-directional adjustable head restraint device in the embodiment.

Fig. 11 is a cross-sectional view of the first fixed end in the embodiment.

Fig. 12 is a structural schematic diagram of another angle of the head rest in the embodiment.

Fig. 13 is an exploded schematic view of the headrest and the connecting plate in the embodiment.

Fig. 14 is a schematic diagram of the bottom structure of the head rest in the embodiment.

Fig. 15 is a schematic structural diagram of the block and the first knob in the embodiment.

Fig. 16 is a structural schematic diagram of the connecting plate, the first fixed end and the second fixed end in the embodiment.

Reference signs: 1, head support; 100, filling pad; 11, first fixed end; 110, second knob; 111, limit piece; 12, telescopic rod; 120 limit slot; chute; 17, card slot; 3, operating bed; 30, second fixed end; 31, connector; 32, fixed slot; 33, third knob; 40, adjustment rod; 400, rack; 41, adjustment handle ;42, fixed seat; 43, rocker cover; 44, adjustment wheel; 5, connecting plate; 51, slide block; 52, anti-off block; 53, slotting; , the first knob.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

The multi-directional adjustable head immobilization device as shown in Figures 1 to 16 includes a head support 1 and a multi-directional adjustable linkage assembly. The head support 1 is arranged at the end of the operating bed 3 through the linkage assembly. Under control and driving, the head rest 1 arranged on the operating bed 3 can rotate in multiple directions relative to the operating bed 3 .

The linkage assembly includes the second fixed end 30, the first fixed end 11, the telescopic rod 12 and the connecting plate 5 which are connected in sequence. The head rest 1 is connected to the connecting plate 5. Multi-angle rotation occurs, and the description of multiple angles is as follows:

Direction a:

One end of the first fixed end 11 is rotatably connected to the second fixed end 30, the first fixed end 11 rotates in the vertical direction, and the headrest 1 rotates in connection between the first fixed end 11 and the second fixed end 30 The lower rotation swing direction is the direction a in FIG. 5 .

In order to fix the position of the headrest 1 in the direction a, the connecting plate 5 under the headrest 1 is provided with a first adjustment mechanism for adjusting the rotation angle between the first fixed end 11 and the second fixed end 30 . As shown in Figures 5 and 6, the first adjustment mechanism includes an adjustment rod 40, a gear-shaped adjustment wheel 44 and a fixed seat 42, one end of the adjustment rod 40 is hinged to the bottom of the connecting plate 5, and the surface of the other end of the adjustment rod 40 A rack 400 is provided, and the fixed base 42 is fixed on the bottom or the bottom surface of the operating bed 3. The fixed base 42 is provided with a rocker cover 43, the rocker cover 43 is hinged with the fixed base 42, and the rocker cover 43 is provided with a through hole. 54 , the adjusting wheel 44 is rotatably arranged in the through hole 54 , and one end of the adjusting rod 40 provided with a rack 400 is set through the through hole 54 , and the rack 400 on the adjusting rod 40 is engaged with the adjusting wheel 44 . In addition, in order to facilitate the rotation of the adjustment wheel 44, an adjustment handle 41 is provided on the outside of the rocker sleeve 43, and the adjustment handle 41 passes through the rocker sleeve 43 and is fixed to the adjustment wheel 44. When the adjustment handle 41 rotates relative to the rocker sleeve 43, the rocker The adjustment wheel 44 in the rod sleeve 43 rotates.

As shown in Figure 6, the internal structure of the rocker cover 43 can be seen, and the medical staff can directly hold the adjustment handle 41 and turn the adjustment handle 41 to drive the adjustment wheel 44, and move the adjustment rod 40 up and down through the meshing relationship , to adjust and fix the movement of the headrest 1 in the direction a.

Direction b:

The second fixed end 30 is arranged at the end of the operating bed 3, and the second fixed end 30 can rotate in the horizontal direction relative to the operating bed 3. In this embodiment, the rotation and swing direction of the head rest 1 on the horizontal plane is as shown in FIG. 10 direction b.

As shown in Figure 9, the second fixed end 30 is provided with a connecting piece 31, the first fixed end 11 is rotatably arranged on the connecting piece 31, and the operating bed 3 is provided with a fixing groove 32 for fixing the second fixed end 30 , the second fixed end 30 and the fixed groove 32 are controlled and connected through the third knob 33; the movement of the head rest 1 in the direction b can be adjusted through the third knob 33, and the base of the first adjustment mechanism can be rotated relative to the ground or the bed surface , to accommodate the rotation of the headrest 1 in the direction b.

Direction c:

The end of the first fixed end 11 away from the second fixed end 30 is provided with a through groove (not shown) for connecting the telescopic rod 12, one end of the telescopic rod 12 is inserted into the through groove of the first fixed end 11, and the telescopic rod The other end of 12 is connected on the connecting plate 5, and the headrest 1 fixed on the connecting plate 5 moves along the length direction of the telescopic rod 12 under the control of the telescopic rod 12, and the medical staff can adjust the headrest 1 and the operating bed 3. The distance between them, the direction in which the headrest 1 moves under the control of the telescopic rod 12 is the direction c in FIG. 10 .

The second fixed end 30 is provided with a second adjustment mechanism for adjusting the length of the telescopic rod 12, as shown in Figure 11 and Figure 12, the second adjustment mechanism includes a second knob 110 and a stopper connected to the second knob 110 111, the second knob 110 is set on the side of the first fixed end 11 facing away from the bed surface of the operating bed 3, and the limit member 111 is set inside the second fixed end 30; The end of the limiting member 111 can be snapped into the limiting groove driven by the second knob 110 to limit the movement of the telescopic rod 12 relative to the first fixed end 11 .

Rotate the second knob 110 so that the end of the stopper 111 is released from the stopper slot, and the telescopic rod 12 can be freely adjusted in length without being restricted by the stopper 111; after adjusting the telescopic rod 12 to an appropriate length, pass the second The knob 110 controls the limiting member to snap into the corresponding limiting slot, and fixes the telescopic rod 12 to ensure that the telescopic rod 12 will not change arbitrarily during use.

Direction d:

The end of the telescopic rod 12 away from the first fixed end 11 is connected to the connecting plate 5, as shown in Figure 13, Figure 14 and Figure 15, the connecting plate 5 is arranged in an arc shape, and a slider is provided on the inner arc surface of the connecting plate 5 51, the outer bottom of the head support 1 is provided with a chute 16, and the length direction of the chute 16 is arranged perpendicular to the length direction of the telescopic rod 12. The connecting plate 5 is arranged on the bottom of the headrest 1 through the slider 51 and the chute 16 , and the slider 51 slides in the chute 16 . In order to prevent the headrest 1 and the connecting plate 5 from separating from each other, as shown in FIG.

The outer bottom of the headrest 1 is provided with a plurality of draw-in slots 17, the draw-in grooves 17 are evenly arranged along the length direction of the chute 16, and the inner arc surface of the connecting plate 5 in contact with the headrest 1 is provided with a slot 53, and inside the slot 53 A locking block 6 is provided, and the locking block 6 can cooperate with the evenly arranged locking grooves 17 to fix the head rest 1 on the connecting plate 5 at a specific angle. The bottom of the locking block 6 is provided with a first knob 61, the first knob 61 can rotate relative to the locking block 6, the locking block 6 is located in the slot 53, and one end of the first knob 61 is fixed on the locking block 6, The other end passes through the through hole 54 and is exposed on the outside of the connecting plate 5 . The inside of the through hole 54 is threadedly engaged with the outer wall of the first knob 61 , and the block can move away from or approach the slot 17 under the control of the first knob 61 .

The medical staff controls the first knob 61 below the connection plate 5 with one hand, and adjusts the distance between the block and the slot 17, so that the headrest 1 can rotate relative to the connection plate 5, or fix the headrest 1 on the connection plate 5; Hold the headrest 1 with one hand, adjust the headrest 1 to a proper position, and then tighten the first knob 61 to fix the headrest 1.

In order to ensure the connection strength between the connecting plate 5 and the headrest 1, and to ensure that the headrest 1 will not shake when it is fixed, as shown in Figure 14, the slot 17 on the outside of the headrest 1 is a strip-shaped slot 17 with a length of The length direction of the bar-shaped locking groove 17 is perpendicular to the length direction of the chute 16. Correspondingly, the locking block 6 is also elongated, and the slot 53 is provided with a plurality of elongated locking blocks 6 mutually. adjacent. As shown in Figure 15 and Figure 16, the spacing width between the locking blocks 6 and the spacing width between the slots 17 are the same, when the first knob 61 is tightened, multiple locking blocks 6 are simultaneously snapped into the corresponding slots In 17, the connection strength between the two is guaranteed, and the headrest 1 will not rotate relative to the connecting plate 5; through the above structure and adjustment method, the headrest 1 can be twisted along the direction d shown by the arrow in FIG. 12 .

In addition, in order to ensure a stable connection between the connecting plate 5 and the head rest 1, there are two sliders 51 on the connecting plate 5, two slide grooves 16 on the outside of the head rest 1, and the two sliders 51 are respectively arranged On both sides of the slot 53 on the connecting plate 5 , the sliders 51 are respectively arranged on both sides of the slot 53 , the sliding slots 16 are arranged parallel to each other, and the two sliding slots 16 are respectively arranged on both sides of the locking slot 17 .

Through the joint control of the linkage components and multiple adjustment mechanisms, the medical staff can control the headrest 1 at any desired angle through the adjustment in direction a, direction b, direction c and/or direction d, so as to ensure the best treatment Effect.

In addition, in order to ensure that the patient's head can be placed on the headrest 1 stably, and to ensure that the head can accurately follow the rotation of the headrest 1, as shown in Figure 13, the headrest 1 is provided with a strap 15 for the patient's head After the head is placed on the head rest 1, the strap 15 walks around the patient's forehead, and the two ends are fixed on the head rest 1 to serve the purpose of fixing the patient's head.

Because the size of each patient's head is different, after being placed in the headrest 1 of the same specification, it is easy to shake, which will also affect the treatment. In order to ensure that the patient's head is placed on the headrest 1, it will not Shaking, the inner surface of the head rest 1 for placing the patient's head is provided with a filling pad 100, and the filling pad 100 is located at the position where the top of the ears on both sides of the patient's head contacts the inner side of the head rest 1. At the same time, in order to adapt to different The size of the head, the filling pad 100 adopts soft and elastic materials, such as sponge, latex or rubber.

The above is the preferred embodiment of the present invention. For those skilled in the art, some modifications and improvements can be made without departing from the principle of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims (7)

1. A multi-directional adjustable head immobilization device, characterized in that: it comprises a head support (1) and a linkage assembly capable of multi-directional adjustment, and the head support (1) is arranged on the operating bed ( 3), the linkage assembly includes a second fixed end (30), a first fixed end (11), a telescopic rod (12) and a connecting plate (5) connected in sequence; - the second fixed end (30) is arranged at the end of the operating bed (3), and the second fixed end (30) can rotate in the horizontal direction relative to the operating bed (3); - One end of the first fixed end (11) is rotatably connected to the second fixed end (30), the first fixed end (11) rotates in the vertical direction, the first fixed end (11) The other end of is provided with the through groove that is used to connect telescopic rod (12); - one end of the telescopic rod (12) is inserted into the through groove of the first fixed end (11), and the other end of the telescopic rod (12) is connected to the connecting plate (5); -The connecting plate (5) is fixed on the end of the telescopic rod (12) away from the first fixed end (11), the connecting plate (5) is arranged in an arc shape, and the inner arc surface of the connecting plate (5) A slide block (51) is provided on the top, and a chute (16) is provided on the outer bottom of the head support (1), and the length direction of the chute (16) is arranged perpendicular to the length direction of the telescopic rod (12). The connecting plate (5) is arranged on the bottom of the headrest (1) through the slide block (51) and the slide groove (16), the slide block (51) slides in the slide groove (16), and the slide block (51 ) is provided with an anti-off block (52) for preventing the slide block (51) from slipping out of the chute (16), and the thickness of the anti-off block (52) is greater than the thickness of the slide block (51); The head fixing device also includes a first adjustment mechanism for adjusting the rotation angle between the first fixed end (11) and the second fixed end (30); the first adjustment mechanism includes an adjustment rod (40), a gear-shaped The adjustment wheel (44) and the fixed seat (42) are provided, one end of the adjustment rod (40) is hinged with the bottom of the connecting plate (5), and the surface of the other end of the adjustment rod (40) is provided with a rack (400), the fixed seat (42) is fixed on the bottom or bottom surface of the operating bed (3), the fixed seat (42) is provided with a rocker cover (43), and the rocker cover (43) is connected with The fixed seat (42) is hinged, the rocker cover (43) is provided with a through hole (54), the adjustment wheel (44) is rotatably arranged in the through hole (54), and the adjustment rod (40 ) is provided with one end of the rack (400) passing through the through hole (54), and the rack (400) on the adjusting rod (40) is engaged with the adjusting wheel (44); The head fixing device also includes an adjustment handle (41), the adjustment handle (41) is arranged on the outside of the rocker sleeve (43), and one end of the adjustment handle (41) passes through the rocker sleeve (43) and the The adjustment wheel (44) is fixed, and when the adjustment handle (41) rotates relative to the rocker sleeve (43), it drives the adjustment wheel (44) in the rocker sleeve (43) to rotate. 2. The multidirectional adjustable head restraint device according to claim 1, characterized in that it further comprises a locking block (6) and a first knob (61), and the connecting plate (5) is connected to the head support (1 ) is provided with a slot (53) on the inner arc surface contacted, the bottom of the slot (53) is provided with a through hole (54), and the locking block (6) is located in the slot (53), The first knob (61) is connected to the bottom of the locking block (6) through the through hole (54), and the first knob (61) can rotate relative to the locking block (6); -The outer bottom of the head support (1) is provided with a number of card slots (17), the card slots (17) are evenly arranged along the length direction of the chute (16), the inside of the through hole (54) is connected with the The outer wall of the first knob (61) is screwed together, and the locking block can move away from or approach the locking groove (17) under the control of the first knob (61). 3. The multi-directional adjustable head restraint device according to claim 1, characterized in that it further comprises a second adjustment mechanism for adjusting the distance between the first fixation end (11) and the headrest (1), The second adjustment mechanism includes a second knob (110) and a stopper (111) connected to the second knob (110), and the second knob (110) is arranged at the first fixed end (11) facing away from On one side of the bed surface of the operating bed (3), the limiter (111) is arranged inside the second fixed end (30); the telescopic rod (12) is provided with a number of limit grooves arranged evenly, so that The end of the limiting member (111) can be snapped into the limiting groove driven by the second knob (110) to limit the movement of the telescopic rod (12) relative to the first fixed end (11). 4. The multidirectional adjustable head restraint device according to claim 1 or 3, characterized in that: the second fixed end (30) is provided with a connecting piece (31), and the first fixed end (11) ) is rotatably arranged on the connector (31), the operating bed (3) is provided with a fixing groove (32) for fixing the second fixed end (30), the second fixed end (30) and the fixed The slot (32) is connected via a third knob (33) (33). 5. The multidirectional adjustable head immobilization device according to claim 4, characterized in that: the inner surface of the head support (1) for placing the patient's head is provided with a filling pad (100), the filling The pads (100) are located at the position where the top of the ears on both sides of the patient's head contacts the inner side of the headrest (1). 6. The multidirectional adjustable head fixing device according to claim 1 or 5, characterized in that: there are two sliders (51) on the connecting plate (5), and the head rest (1) The upper chute (16) is provided with two, and two slide blocks (51) and two chute (16) are arranged correspondingly, and described slide block (51) is respectively arranged on the both sides of groove (53), The sliding slots (16) are arranged parallel to each other, and the two sliding slots (16) are respectively arranged on both sides of the locking slot (17). 7. The multidirectional adjustable head immobilization device according to claim 6, characterized in that: the head rest (1) is provided with a strap (15) for preventing the patient's head from detaching from the head rest (1) .

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