CN217339798U - Multipurpose transcranial magnetic stimulation instrument - Google Patents

Abstract

The application relates to the field of medical instruments, in particular to a multipurpose transcranial magnetic stimulation instrument, which comprises a stimulation instrument body, a magnetic stimulation head and a fixing frame; the magnetic stimulation head is detachably connected to the fixing frame through a connecting assembly, the magnetic stimulation head is connected to the stimulation instrument body through a wire, and the magnetic stimulation head comprises a magnetic stimulation plate and a handle fixedly connected to one side of the magnetic stimulation plate; the fixing frame is a universal adjusting support so as to adjust the position of the magnetic stimulation head. The application has the effects of improving the application range of the transcranial magnetic stimulation instrument and reducing the purchase cost.

Description

Multipurpose transcranial magnetic stimulation instrument

Technical Field

The present application relates to the field of medical devices, and more particularly, to a multi-purpose transcranial magnetic stimulation apparatus.

Background

The transcranial magnetic stimulation (brain circulation dysfunction therapy) is a constant three-dimensional superposed electric field formed in the cranium by using an alternating magnetic field generated by transcranial magnetism (rTMS) and acts on a brain microcirculation system. When the transcranial magnetic stimulation instrument acts on the brain of a human body, weak current can be generated at a specific part, bioelectricity activity in the brain is interfered, activity of a nerve medium secretase system is changed, permeability of cell membranes is enhanced, exchange, synthesis, decomposition and other biochemical reactions of substances inside and outside the cell membranes are promoted, synthesis and release of monoamine neurotransmitters in the nervous system are accelerated, alpha brain waves are induced and enhanced, brain cells in an inhibition state are activated, and the aims of calming, soothing the nerves, promoting sleep, resisting depression and anxiety, eliminating neurasthenia and relieving brain fatigue are achieved.

The transcranial magnetic stimulation instruments on the market at present mainly comprise the following two types, one type is an external treatment cap, the treatment cap is worn on the head of a patient, and a coil of the transcranial magnetic stimulation instrument can generate induction current to stimulate brain tissues so as to achieve the treatment effect; the second is an external electrode plate, which is pasted on the mastoid acupoint behind the ear, and the cerebellum acronucleus is stimulated by the simulation bioelectric current (low-frequency electricity) to achieve the therapeutic effect.

The two kinds of treatment equipment have indications, most of the treatment equipment on the market at present are single-function, if the treatment on two parts is realized, two pieces of equipment need to be purchased, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

In order to improve the application range of the transcranial magnetic stimulation instrument and reduce the purchase cost, the application provides a multipurpose transcranial magnetic stimulation instrument.

The multipurpose transcranial magnetic stimulation instrument provided by the application adopts the following technical scheme:

a multipurpose transcranial magnetic stimulation instrument comprises a stimulation instrument body, a magnetic stimulation head and a fixing frame; the magnetic stimulation head is detachably connected to the fixing frame through a connecting assembly, the magnetic stimulation head is connected to the stimulation instrument body through a wire, and the magnetic stimulation head comprises a magnetic stimulation plate and a handle fixedly connected to one side of the magnetic stimulation plate; the fixing frame is a universal adjusting support to adjust the position of the magnetic stimulation head.

Through adopting above-mentioned technical scheme, during the use, can directly pass through coupling assembling with the magnetic stimulation head and install on the mount to adjust the position of magnetic stimulation head through the mount, make the magnetic stimulation head place in the human body and need detect amazing suitable position. Due to the arrangement of the magnetic stimulation plate, no matter which part of the human body needs to be stimulated by a patient, the magnetic stimulation plate can be abutted to the proper position of the human body. Compared with the existing therapeutic cap which can only stimulate the fixed position of the brain of a human body, the electrode plate can only stimulate the cerebellum, the magnetic stimulation plate can meet the stimulation requirements of various parts, and the application range of the radial skull magnetic stimulation instrument is greatly enlarged. The stimulation requirements of different parts can be met by only purchasing one device in the hospital, so that the purchase cost is greatly reduced.

Optionally, coupling assembling includes connecting rod and rigid coupling and is in the articulated ball of connecting rod one end, the confession has been seted up on the mount the recess of articulated ball embedding, the magnetism magnetic stimulation head with the connection can be dismantled to the connecting rod.

Through adopting above-mentioned technical scheme, through installing the magnetic stimulation head on the connecting rod to install articulated ball in the recess, can realize the ball-hinge joint of magnetic stimulation head and mount and be convenient for adjust the position and the angle of magnetic stimulation head as required, in order to adapt to the amazing needs in different positions of human body.

Optionally, the connecting assembly further comprises a mounting bolt which is in threaded connection and is far away from one end of the hinge ball, and a mounting hole for the mounting bolt to penetrate is formed in the magnetic stimulation head.

Through adopting above-mentioned technical scheme, through wearing to establish mounting bolt in the mounting hole to finally revolve and twist on the connecting rod, can fix the magnetic stimulation head on the mount through coupling assembling.

Optionally, the connecting assembly further comprises a clamp fixedly connected to one end, away from the hinge ball, of the connecting rod, and the handle is clamped in the clamp.

Through adopting above-mentioned technical scheme, through with the handle centre gripping in the clip, can fix the position of magnetic stimulation head on the mount.

Optionally, the mount includes that vertical telescopic link, rigid coupling of placing are in the telescopic link lower extreme is used for carrying out the support frame that supports to the telescopic link and rotates to be connected installation pole on the telescopic link, installation pole length direction with telescopic link length direction is perpendicular, the installation pole is kept away from the one end of telescopic link is rotated and is connected with the erection joint, the erection joint with the axis of rotation of installation pole with the axis of rotation of telescopic link is perpendicular, the recess is seted up on the erection joint, it is fixed to be provided with on the erection joint the hinge ball is in the mounting of recess internal position.

Through adopting above-mentioned technical scheme, can adjust the height of mount through the telescopic link, rotate for the telescopic link through the operation installation pole, can adjust the position of installing the magnetic stimulation head orientation on the attach fitting. The position of the magnetic stimulation head in the other direction can be adjusted by operating the mounting joint to rotate relative to the mounting rod; the angle of the magnetic stimulation head can be adjusted by operating the hinged ball to rotate in the groove. So as to realize the adjustment of the magnetic stimulation head and meet the stimulation requirements of all parts of the patient. After the adjustment is finished, the position of the hinged ball in the groove can be fixed through the fixing piece, so that the magnetic stimulation head is always abutted to the set position of the human body.

Optionally, the side wall of the installation rod is in threaded connection with a locking bolt, and the locking bolt is abutted to the outer wall of the telescopic rod.

By adopting the technical scheme, the relative position of the mounting rod on the telescopic rod can be fixed by screwing the locking bolt, so that the mounting rod is prevented from rotating relative to the telescopic rod when in use.

Optionally, two opposite side walls penetrating the installation joint are provided with a plurality of first limiting holes, the first limiting holes are provided with a plurality of hinging shafts surrounding the installation joint and the installation rod, two opposite sides penetrating the installation rod are provided with second limiting holes, and the first limiting holes and the second limiting holes are inserted with limiting pins.

By adopting the technical scheme, the relative positions of the mounting joint and the mounting rod can be adjusted by inserting and matching the limiting pin with the first limiting holes at different positions, so that the position of the magnetic stimulation head can be adjusted.

Optionally, a sliding hole communicated to the groove is formed in one side of the mounting joint, the fixing piece comprises an operating rod connected in the sliding hole in a sliding manner, and one end of the operating rod, facing the groove, is in an arc shape.

Through adopting above-mentioned technical scheme, under the normality, articulated ball can be at the recess internal rotation to the angle of the magnetic stimulation head of regulation installation on erection joint. After the adjustment is finished, the operating rod is directly operated to slide in the sliding hole, so that the operating rod is abutted against the hinged ball, the hinged ball can be fixed between the inner wall of the groove and the operating rod, the position of the hinged ball in the groove is fixed, and the position of the magnetic stimulation head on the fixing frame is fixed.

Optionally, the action bars include sliding connection in the sliding hole's butt pole and threaded connection in the sliding hole's drive pole, drive the pole with the butt pole rotates to be connected, the butt pole is located the drive pole orientation the one end of recess, the drive pole is kept away from the one end of butt pole stretches out the sliding hole.

Through adopting above-mentioned technical scheme, the doctor directly drives the pole rotation at external operation, can drive through the butt pole and drive pole tip and slide to the recess in, perhaps drive the pole tip and follow the recess roll-off to the realization is to the fixed of articulated ball and remove the fixed of articulated ball.

Optionally, a clamping block is fixedly connected to the side wall of the abutting rod, a sliding groove for sliding the clamping block is formed in the wall of the sliding hole, and the length direction of the sliding groove is consistent with that of the sliding hole.

Through adopting above-mentioned technical scheme, can fix the circumference distance of butt joint pole through the cooperation of fixture block and spout, avoid the butt pole to rotate along with the drive rod, and influence the circular arc cooperation radian of butt joint board and hinge ball.

In summary, the present application includes at least one of the following beneficial technical effects:

1. according to the radial skull magnetic stimulation instrument, the plate-shaped magnetic stimulation plate is arranged, and the position of the magnetic stimulation plate is fixed through the fixing frame, so that the magnetic stimulation can be performed on the proper part of a patient through the magnetic stimulation plate, the application range of the radial skull magnetic stimulation instrument is greatly enlarged, and the purchase cost is reduced;

2. the rotary connection of the mounting rod and the telescopic rod, the rotary connection of the mounting joint and the mounting rod, and the matching of the connecting assembly and the mounting joint enable the magnetic stimulation head to be adjusted in all directions so as to adapt to the stimulation requirements of different parts;

3. the quick installation and disassembly of the magnetic stimulation head can be realized by the arrangement of the connecting component, and the operation is more convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of the present application.

Fig. 2 is a partially exploded view of the joint and rod joint structure.

Fig. 3 is a schematic view showing the structure of the fixing member.

Fig. 4 is an enlarged schematic view at a in fig. 3.

Fig. 5 is a schematic view of another example of a connecting assembly.

Description of reference numerals: 1. a stimulator body; 2. a magnetic stimulation head; 21. a magnetic stimulation plate; 22. a handle; 23. mounting holes; 3. a fixed mount; 31. a support frame; 32. a telescopic rod; 33. mounting a rod; 331. a second limiting hole; 34. installing a connector; 341. a first limit hole; 342. a spacing pin; 343. a slide hole; 344. a chute; 345. a groove; 35. locking the bolt; 36. braking the universal wheel; 4. a connection assembly; 41. a connecting rod; 42. hinging the ball; 43. a fixing member; 431. a butting rod; 4311. rotating the block; 432. driving the rod; 4321. rotating the groove; 433. a clamping block; 44. installing a bolt; 45. a clip; 5. an electric wire.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a multipurpose transcranial magnetic stimulation instrument. Referring to fig. 1, a transcranial magnetic stimulation apparatus includes a stimulation apparatus body 1 and a magnetic stimulation head 2 connected to the magnetic stimulation apparatus.

The magnetic stimulation head 2 includes a plate-shaped magnetic stimulation plate 21 with a coil mounted therein and a handle 22 fixedly connected to one side of the magnetic stimulation plate 21, and the coil in the magnetic stimulation head 2 is connected to the magnetic stimulator main body 1 through a wire. When in use, the handle 22 is directly held by hand, the magnetic stimulation plate 21 is placed at the part of the human body needing stimulation, and the magnetic stimulation work can be carried out on different parts of the human body through the magnetic stimulation plate 21, so that the application range of the transcranial magnetic stimulation instrument is greatly improved compared with the existing single-part stimulation; the stimulation work of a plurality of positions can be carried out only by purchasing one device, so that the purchase cost is greatly reduced.

Certainly, in order to facilitate carrying out amazing in-process to the patient, can fix the position of magnetic stimulator body 1, can also set up the mount 3 that is used for fixed magnetic stimulator position, mount 3 can place subaerial, and mount 3 is the universal adjusting bracket to in order to satisfy the amazing needs in different positions of patient according to the position of adjusting magnetic stimulation head 2 to the difference of patient's amazing position.

Referring to fig. 1, the fixing frame 3 includes a supporting frame 31, a vertically disposed telescopic rod 32 fixedly connected to the supporting frame 31, and a mounting rod 33 rotatably connected to an upper end of the telescopic rod 32, a mounting joint 34 rotatably connected to an end of the mounting rod 33 far away from the telescopic rod 32, a connecting assembly 4 for detachably connecting the magnetic stimulation head 2 to the mounting joint 34 is disposed between the mounting joint 34 and the magnetic stimulation head 2, and the magnetic stimulation head 2 is ball-hinged to the mounting joint 34 through the connecting assembly 4. The support frame 31 mainly plays a role of supporting, and the rotation axes of the mounting joint 34 and the mounting rod 33 are perpendicular to the rotation axes of the mounting rod 33 and the telescopic rod 32. During the use, can directly place support frame 31 on subaerial, adjust the height of installation pole 33 through telescopic link 32 to the height of adjusting the magnetic stimulation appearance of installing on erection joint 34, in order to adapt to the needs of the different position stimulation height of patient. The angle of the magnetic stimulation head 2 can be adjusted by operating the installation joint 34 to rotate relative to the installation rod 33, rotating the installation rod 33 relative to the telescopic rod 32 and adjusting the position of the magnetic stimulation head 2 relative to the installation joint 34, so that the adjustment is more convenient.

In order to fix the position of the mounting rod 33 relative to the telescopic rod 32, a locking bolt 35 is screwed to the side wall of the mounting rod 33, the locking bolt 35 abuts against the side wall of the telescopic rod 32, and the relative position of the mounting rod 33 and the telescopic rod 32 can be fixed by the locking bolt 35. When the mounting rod 33 needs to be operated to rotate relative to the telescopic rod 32, the mounting rod 33 can be operated to rotate by directly unscrewing the locking bolt 35, and the operation is more convenient.

Referring to fig. 2, a first limit hole 341 is opened through the two opposite sides of the mounting joint 34, the axis of the limit pin 342 and the rotation axis of the mounting joint 34 are arranged in a dislocation manner, a second limit hole 331 is opened through the two opposite sides of the mounting rod 33, the axis of the second limit hole 331 and the rotation axis of the mounting joint 34 and the mounting rod 33 are arranged in a dislocation manner, the limit pin 342 is inserted into the first limit hole 341 and the second limit hole 331 at the same time, the relative positions of the mounting joint 34 and the mounting rod 33 can be fixed, and the mounting joint 34 is prevented from rotating relative to the mounting rod 33 under the action of external force. The first limit holes 341 are spaced around the rotation axis of the mounting joint 34 and the mounting rod 33, and the rotation angle of the mounting joint 34 relative to the mounting rod 33 can be adjusted by operating the limit pins 342 to match with the first limit holes 341 at different positions.

Referring to fig. 2 and 3, the connecting assembly 4 is disposed at an end of the mounting joint 34 away from the mounting rod 33, the connecting assembly 4 includes a connecting rod 41 and a hinge ball 42 fixedly connected to an end of the connecting rod 41, and the magnetic stimulation head 2 is detachably connected to an end of the connecting rod 41 away from the hinge ball 42. Meanwhile, a groove 345 for embedding the hinge ball 42 is formed at one end of the mounting joint 34 far away from the mounting rod 33, and the ball-hinged connection between the magnetic stimulation head 2 and the mounting joint 34 can be realized through the matching of the hinge ball 42 and the groove 345.

Meanwhile, the fixing piece 43 for fixing the position of the hinge ball 42 in the groove 345 is arranged on the mounting joint 34, and the position of the hinge ball 42 in the groove 345 can be fixed through the fixing piece 43, so that the hinge ball 42 is prevented from rotating in the groove 345 to influence the normal magnetic stimulation work in the process of performing magnetic stimulation on a patient by the magnetic stimulation head 2.

Referring to fig. 3 and 4, a sliding hole 343 communicating with the groove 345 is formed at one side of the mounting joint 34, the fixing member 43 includes an operating rod slidably connected in the sliding hole 343, one end of the operating rod facing the groove 345 is arc-shaped, and the arc opening radian of the operating rod is matched with the hinge ball 42. In a normal state, the hinge ball 42 can freely rotate in the groove 345, and when the position of the magnetic stimulation head 2 needs to be fixed after the magnetic stimulation head 2 is adjusted, the operating rod can be directly operated to slide in the sliding hole 343, so that the operating rod abuts against the hinge ball 42, the hinge ball 42 is clamped between the operating rod and the inner wall of the groove 345, and the position of the hinge ball 42 in the groove 345 is clamped.

The operating rod includes an abutting rod 431 slidably connected in the sliding hole 343 and a driving rod 432 threadedly connected in the sliding hole 343, the abutting rod 431 is located on one side of the driving rod 432 facing the groove 345, the driving rod 432 is fixedly connected to one end of the abutting rod 431 far away from the driving rod 432, and one end of the driving rod 432 far away from the abutting rod 431 extends out of the sliding hole 343 and is exposed to the outside. The operator directly rotates the driving rod 432 from the outside to operate one end of the driving rod 432 in the sliding hole 343 along the axial direction thereof, and the driving rod 432 will drive the abutting rod 431 to move, so as to fix the hinge ball 42 in the groove 345 or to contact and clamp the hinge ball 42.

Meanwhile, in order to avoid that the driving rod 432 rotates when the driving rod 432 is operated, the abutting rod 431 rotates along with the driving rod 432 to enable the arc surface of the abutting rod 431 to be not tightly abutted to the hinge ball 42, a clamping block 433 is fixedly connected to one side of the abutting rod 431, a sliding groove 344 for the clamping block 433 to slide is formed in the wall of the sliding hole 343, and the length direction of the sliding groove 344 is consistent with that of the sliding hole 343, so that when the driving rod 432 rotates in the sliding hole 343 to achieve axial movement, the clamping block 433 also slides in the sliding groove 344 to limit the circumferential position of the abutting rod 431.

Referring to fig. 4, a rotating block 4311 with a T-shaped cross section is fixedly connected to an end of the abutting rod 431 away from the arc surface, a rotating groove 4321 for rotating the rotating block 4311 is formed in an end of the driving rod 432 located in the sliding hole 343, and the abutting rod 431 is rotatably connected to the driving rod 432 by matching the rotating block 4311 with the rotating groove 4321.

Referring to fig. 1 and 3, in an example of the present application, the connection assembly 4 further includes a mounting bolt 44 screwed to one end of the connection rod 41 away from the hinge ball 42, and mounting holes 23 for the mounting bolt 44 to pass through are further formed through two opposite sides of the magnetic stimulation head 2. Specifically, the mounting hole 23 may be formed in the magnetic stimulation plate 21 or in the handle 22, as long as the magnetic stimulation head 2 can be mounted and fixed. The position of the magnetic stimulation head 2 on the connecting rod 41 can be fixed by penetrating the mounting bolt 44 into the mounting hole 23 and screwing the mounting bolt on the connecting rod 41, so that the magnetic stimulation head 2 is fixed.

Referring to fig. 5, in another example of the present application, the connecting assembly 4 further includes a clip 45 affixed to an end of the connecting rod 41 remote from the hinge ball 42, and the handle 22 of the magnetic stimulation head 2 is clamped in the clip 45. The magnetic stimulation head 2 can be clamped on the fixed frame 3 through the clamp 45, or the magnetic stimulation head 2 is taken down from the fixed frame 3, and the installation and the disassembly are very convenient.

In order to move the magnetic stimulator to a proper position after use, a brake universal wheel 36 is mounted on the lower side of the support frame 31 to move the magnetic stimulator.

The implementation principle of the multipurpose transcranial magnetic stimulation instrument in the embodiment of the application is as follows: when in use, the length of the telescopic rod 32 can be adjusted according to the height of a patient and the position needing magnetic stimulation; then operating the mounting rod 33 to rotate on the telescopic rod 32, and fixing the position of the mounting rod 33 on the telescopic rod 32 through a locking bolt 35; then operating the mounting joint 34 to rotate relative to the mounting rod 33 and fixing the position of the mounting joint 34 on the mounting rod 33 through the limiting pin 342; finally, the position of the hinge ball 42 in the groove 345 is adjusted, and the position of the hinge ball 42 in the groove 345 is fixed by the fixing member 43. The finally adjusted magnetic stimulation plate 21 is abutted against the proper part of the patient needing magnetic stimulation so as to adapt to the magnetic stimulation requirements of different parts, and the application range of the transcranial magnetic stimulation instrument is greatly improved; the magnetic stimulation needs of a plurality of parts can be realized through one device, and the purchase cost is greatly reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A multi-purpose transcranial magnetic stimulation instrument is characterized in that: comprises a stimulator body (1), a magnetic stimulation head (2) and a fixing frame (3); the magnetic stimulation head (2) is detachably connected to the fixed frame (3) through a connecting component (4), the magnetic stimulation head (2) is connected to the stimulation instrument body (1) through a wire (5), and the magnetic stimulation head (2) comprises a magnetic stimulation plate (21) and a handle (22) fixedly connected to one side of the magnetic stimulation plate (21); the fixing frame (3) is a universal adjusting support so as to adjust the position of the magnetic stimulation head (2).

2. The multi-purpose transcranial magnetic stimulation apparatus according to claim 1, wherein: coupling assembling (4) are in including connecting rod (41) and rigid coupling connecting rod (41) one end hinge ball (42), offer the confession on mount (3) recess (345) that hinge ball (42) imbedded, magnetic stimulation head (2) with connecting rod (41) can be dismantled and be connected.

3. The multi-purpose transcranial magnetic stimulation apparatus according to claim 2, wherein: coupling assembling (4) still include threaded connection connecting rod (41) are kept away from the mounting bolt (44) of hinge ball (42) one end, set up the confession on magnetic stimulation head (2) mounting hole (23) that mounting bolt (44) wore to establish.

4. The multi-purpose transcranial magnetic stimulation apparatus according to claim 2, wherein: the connecting component (4) further comprises a clamp (45) fixedly connected to one end, far away from the hinge ball (42), of the connecting rod (41), and the handle (22) is clamped in the clamp (45).

5. The multi-purpose transcranial magnetic stimulation apparatus according to claim 2, wherein: mount (3) are in including vertical telescopic link (32), the rigid coupling of placing telescopic link (32) lower extreme is used for carrying out support frame (31) that supports and rotate the connection to telescopic link (32) installation pole (33) on telescopic link (32), installation pole (33) length direction with telescopic link (32) length direction is perpendicular, installation pole (33) are kept away from the one end of telescopic link (32) is rotated and is connected with erection joint (34), erection joint (34) with the axis of rotation of installation pole (33) with the axis of rotation of telescopic link (32) is perpendicular, recess (345) are seted up on erection joint (34), be provided with on erection joint (34) fixedly hinge ball (42) are in the mounting (43) of recess (345) internal position.

6. The multi-purpose transcranial magnetic stimulation apparatus according to claim 5, wherein: threaded connection has locking bolt (35) on installation pole (33) lateral wall, locking bolt (35) with telescopic link (32) outer wall butt.

7. The multi-purpose transcranial magnetic stimulation apparatus according to claim 5, wherein: the installation structure is characterized in that two opposite side walls penetrating through the installation joint (34) are provided with a plurality of first limiting holes (341), the first limiting holes (341) surround the hinging shaft of the installation joint (34) and the installation rod (33), two opposite sides penetrating through the installation rod (33) are provided with second limiting holes (331), and the first limiting holes (341) and the second limiting holes (331) are inserted with limiting pins (342).

8. The multi-purpose transcranial magnetic stimulation apparatus according to claim 5, wherein: one side of the mounting joint (34) is provided with a sliding hole (343) communicated to the groove (345), the fixed piece (43) comprises an operating rod connected in the sliding hole (343) in a sliding mode, and one end, facing the groove (345), of the operating rod is arc-shaped.

9. The multi-purpose transcranial magnetic stimulation apparatus according to claim 8, wherein: the operating rod comprises a butting rod (431) connected in the sliding hole (343) in a sliding mode and a driving rod (432) connected in the sliding hole (343) in a threaded mode, the driving rod (432) is connected with the butting rod (431) in a rotating mode, the butting rod (431) is located at one end, facing the groove (345), of the driving rod (432), and one end, away from the butting rod (431), of the driving rod (432) extends out of the sliding hole (343).

10. The multi-purpose transcranial magnetic stimulation apparatus according to claim 9, wherein: a clamping block (433) is fixedly connected to the side wall of the abutting rod (431), a sliding groove (344) for the clamping block (433) to slide is formed in the wall of the sliding hole (343), and the length direction of the sliding groove (344) is consistent with the length direction of the sliding hole (343).

Images