CN113082521A

CN113082521A - Medical instrument and fixing device thereof

Info

Publication number: CN113082521A
Application number: CN202110378166.7A
Authority: CN
Inventors: 张磊
Original assignee: Sceneray Co Ltd
Current assignee: Sceneray Co Ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-07-09
Anticipated expiration: 2041-04-08
Also published as: CN113082521B; WO2022213744A1

Abstract

The invention relates to a medical instrument and a fixing device thereof. This fixing device is used for fixed wire rod, including fixed block and locking piece, be provided with the line hole and the lockhole of intercommunication on the fixed block, the line hole is used for supplying the wire rod holding or passes, the locking piece holding is in the lockhole or pass lockhole and locking are in on the fixed block, still including pressing tightly the piece, it is in to press tightly the piece holding in the lockhole, locking piece locking is in the in-process on the fixed block, it does not rotate to press tightly the piece, the locking piece is right press tightly the piece and apply the effort, and pass through it fixes the wire rod in the line hole. Through setting up and compressing tightly the piece, the locking piece locking is in-process on the fixed block, compress tightly the piece and do not rotate, can prevent that the wire from removing and misplacing.

Description

Medical instrument and fixing device thereof

Technical Field

The application relates to the technical field of medical instruments, in particular to a medical instrument and a fixing device thereof.

Background

With the development of technology, the manufacturing technology and process of brain pacemakers and cardiac pacemakers are rapidly developed, saving the lives of thousands of patients. Brain pacemakers and cardiac pacemakers generally include a pulse generator, a lead, and electrodes, and pulses generated by the pulse generator are transmitted to the electrodes through the lead to electrically stimulate nerves. Since the pulse generator, the lead and the electrode are implanted in the human body at the time of treatment, it is necessary to secure a firm connection between the pulse generator, the lead and the electrode.

Chinese patent publication No. CN111529937A discloses an impulse generator, which, referring to fig. 1, includes a fixing component for fixing a wire 106, where the fixing component includes a fixing block 101 and a fixing member 102 lockable in the fixing block 101, at least one receiving hole 105 for receiving the wire 106 is provided in the fixing block 101, the fixing member 102 includes a locking portion 103 cooperating with the fixing block 101 to lock the fixing member 102 and the fixing block 101, and a pressing portion 104 provided on the locking portion 103, and the pressing portion 104 presses the wire 106 in the receiving hole 105. The fixing assembly has the disadvantage that the conducting wire 106 moves along with the rotation of the fixing member 102 during the process of locking the fixing member 102 into the fixing block 101, which easily causes the conducting wire 106 to be dislocated.

Disclosure of Invention

An object of the application is to provide a medical instrument and a fixing device thereof, which can prevent the lead from moving and misplacing when the lead is fixed by the fixing device.

The purpose of the application is realized by adopting the following technical scheme:

the utility model provides a fixing device for fixed wire rod, includes fixed block and locking piece, be provided with the line hole and the lockhole of intercommunication on the fixed block, the line hole is used for supplying the wire rod holding or passes, the locking piece holding is in or passes in the lockhole and locking are in on the fixed block, still including compressing tightly the piece, it is in to compress tightly a holding in the lockhole, locking piece locking is in the in-process on the fixed block, it does not rotate to compress tightly the piece, the locking piece is right compress tightly the piece and apply the effort, and pass through it fixes the wire rod in the line hole. This technical scheme's beneficial effect lies in, compresses tightly the piece through the setting, and the locking piece locking is in-process on the fixed block, compress tightly the piece and do not rotate, can prevent that the wire from removing and the dislocation.

Preferably, the fixed block is provided with a first limiting part, the pressing piece is provided with a second limiting part, and the first limiting part and the second limiting part have a structure for preventing the pressing piece from rotating in the lock hole during interaction. The technical scheme has the beneficial effects that through the arrangement of the first limiting part and the second limiting part, the locking piece is locked on the fixed block, the pressing piece is prevented from rotating in the lock hole, and then the lead is prevented from moving and misplacing.

Preferably, the structure for preventing the pressing piece from rotating in the lock hole is one or more of a combination of a curved surface structure, a concave-convex matching structure, a buckle matching structure, a structure with a frosted surface and a structure with convex points.

Preferably, the fixing device further comprises a driving member, the driving member is arranged on the pressing member or the locking member, and when the locking member is moved out of the lock hole, the locking member drives the pressing member to move along the moving-out direction through the driving member. This technical scheme's beneficial effect lies in, through setting up the driving piece, can conveniently will compress tightly a part at least partly that moves out in the lockhole to make things convenient for the dismouting wire rod.

Preferably, when the driver is arranged on the pressing piece, the driver has a first protruding portion protruding out of the side surface of the pressing piece facing the locking piece, and the locking piece is provided with a first concave portion for accommodating the first protruding portion of the driver;

when the driving piece is arranged on the locking piece, the driving piece is provided with a second protruding part protruding out of the side face, facing the pressing piece, of the locking piece, and a second concave part for accommodating the second protruding part of the driving piece is arranged on the pressing piece. The beneficial effect of this technical scheme lies in that the driving piece of above-mentioned structure can conveniently will compress tightly a piece and remove at least partly in the lockhole.

Preferably, the first concave part is an annular groove arranged on the outer peripheral surface of the locking piece, and the first convex part is in clearance fit with the first concave part; the second depressed part is an annular groove arranged on the inner peripheral surface of the pressing piece, and the second protruding part is in clearance fit with the second depressed part. The beneficial effects of this technical scheme lie in, the driving piece of above-mentioned structure can conveniently will compress tightly a part at least that removes in the lockhole, and when the locking of locking piece or unblock simultaneously, do not influence the rotation of locking piece.

Preferably, the driving member is a limit pin, the pressing member is provided with a pin hole, the outer circumferential surface of the locking member is provided with an annular groove, the front end of the limit pin protrudes out of the inner circumferential surface of the pressing member and is accommodated in the annular groove of the locking member with a clearance, and the rear end of the limit pin is fixed in the pin hole of the pressing member. The beneficial effects of this technical scheme lie in, the driving piece simple to operate of above-mentioned structure can compress tightly the wire rod and prevent to compress tightly the piece and rotate and the removal and the dislocation of wire rod along with the screw through compressing tightly the piece.

Preferably, the driving member is a bevel ring spring, annular grooves are formed in the inner circumferential surface of the pressing member and the outer circumferential surface of the locking member, a part of the bevel ring spring is accommodated in the annular groove of the pressing member, and the other part of the bevel ring spring protrudes out of the inner circumferential surface of the pressing member and is accommodated in the annular groove of the locking member with a gap. The beneficial effects of this technical scheme lie in, the driving piece simple to operate of above-mentioned structure can compress tightly the wire rod and prevent to compress tightly the piece and rotate and the removal and the dislocation of wire rod along with the screw through compressing tightly the piece.

Preferably, the outer peripheral surface of the locking piece is divided into a threaded area and a non-threaded area, and the threaded area of the locking piece is used for being in threaded connection with the lock hole;

when the driving piece is arranged on the pressing piece, the first concave part is arranged in a non-threaded area of the locking piece;

when the driving piece is arranged on the locking piece, the driving piece is arranged in a non-threaded area of the locking piece.

Preferably, the pressing piece is provided with a first driving portion protruding out of the inner peripheral surface, an annular groove is formed in the outer peripheral surface of the locking piece, the first driving portion is contained in the annular groove of the locking piece in a clearance mode, and when the locking piece moves out of the lock hole, the pressing piece is driven to move along the moving-out direction through the interaction of the first driving portion and the annular groove of the locking piece by the locking piece; alternatively, the first and second electrodes may be,

the locking piece is provided with a second driving portion protruding out of the outer peripheral face, an annular groove is formed in the inner peripheral face of the pressing piece, the second driving portion is contained in the annular groove of the pressing piece in a clearance mode, and when the locking piece moves out of the lock hole, the locking piece drives the pressing piece to move in the moving-out direction through interaction of the second driving portion and the annular groove of the pressing piece. This technical scheme's beneficial effect lies in, the first drive portion and the second of above-mentioned structure drive portion simple to operate, can compress tightly the wire rod and prevent to compress tightly the piece and rotate along with the screw and the removal and the dislocation of wire rod through compressing tightly the piece.

Preferably, the lockhole runs through the upper and lower two sides of fixed block, when the locking piece locking is in on the fixed block, the lower extreme of locking piece is followed the upper end entering of lockhole stretches out from the lower extreme, the lower extreme of locking piece is provided with and blocks when the locking piece moves out from the lockhole the lower extreme of locking piece retracts the spacing portion of third of lockhole. This technical scheme's beneficial effect lies in, the operator can be restricted to the spacing portion of third to the operation that shifts up of screw, prevents that the screw from breaking away from the fixed block and causing the screw to drop, prevents that the spacing portion of second that compresses tightly the piece from breaking away from and causing the piece rotation of compressing tightly with the first spacing portion of fixed block, can also prevent that the sealing member from breaking away from and causing sealed inefficacy from the lateral wall of fixed block.

Preferably, the third position-limiting part is any one of the following: the locking device comprises a bulge protruding out of the outer peripheral surface of the locking piece adjacent to the lower end, damaged threads on the outer peripheral surface of the locking piece adjacent to the lower end and adhesive coating the outer peripheral surface of the locking piece adjacent to the lower end.

Preferably, the fixed block is provided with a plurality of wire holes, and the pressing piece is a conductor. The technical scheme has the beneficial effects that the conducting of the leads in the plurality of wire holes can be realized by arranging the fixing block into the electric conductor.

Preferably, the fixing device further comprises a sealing member disposed between the locking member and the fixing block to seal the locking hole. The beneficial effects of this technical scheme lie in, can prevent through setting up the sealing member that body fluid from getting into fixing device in, avoid the metalwork among the fixing device to rust or the silica gel piece is ageing, can avoid the short circuit, improve fixing device's security and reliability.

Preferably, the materials of the components of the fixing device are any one of the following materials: plastic, silica gel, metal.

The utility model provides a fixing device for fixed wire rod, includes fixed block and screw, be provided with the line hole and the lockhole of intercommunication on the fixed block, the line hole is used for supplying the wire rod holding or passes, the screw holding is in the lockhole or pass lockhole and locking are in on the fixed block, still include:

the clamping piece is accommodated in the lock hole and provided with a pin hole, the outer peripheral surface of a screw rod of the screw is divided into a threaded area and a non-threaded area, the threaded area of the screw is used for being in threaded connection with the lock hole, and the non-threaded area of the screw is provided with an annular groove;

the front end of the limiting pin protrudes out of the inner circumferential surface of the pressing piece and is contained in the annular groove of the screw in a clearance mode, and the rear end of the limiting pin is fixed in the pin hole of the pressing piece;

be provided with first spacing portion on the fixed block, it is provided with the spacing portion of second to compress tightly on the piece, first spacing portion prevents when the spacing portion of second has the interact compress tightly the piece and be in along with screw pivoted structure when the screw is screwed in, the screw locking is in when on the fixed block, the screw is right compress tightly the piece and apply the effort, and pass through compress tightly the piece and fix the wire rod in the wire hole. This technical scheme's beneficial effect lies in, compresses tightly the piece through the setting, and the locking piece locking is in-process on the fixed block, compress tightly the piece and do not rotate, can prevent that the wire from removing and the dislocation. Through setting up the spacer pin, can conveniently will compress tightly a piece and remove at least partly in the lockhole to make things convenient for dismouting wire rod.

Preferably, the first limiting part is a convex part on the inner circumferential surface of the lock hole, and the second limiting part is a concave part on the outer circumferential surface of the pressing piece; or, the first limiting part is a concave part on the inner circumferential surface of the lock hole, and the second limiting part is a convex part on the outer circumferential surface of the pressing piece. This technical scheme's beneficial effect lies in, at screw locking in-process, the first spacing portion and the spacing portion of second of above-mentioned structure can effectively prevent to compress tightly a rotation.

Preferably, the pin hole penetrates through the inner circumferential surface and the outer circumferential surface of the pressing piece, and the rear end of the limit pin is flush with the outer circumferential surface of the pressing piece or is retracted into the pin hole of the pressing piece. The beneficial effect of the technical proposal is that,

preferably, the fixed block is provided with a mounting hole corresponding to the pin hole of the pressing member. The beneficial effect of the technical proposal is that,

preferably, the locking hole penetrates through the upper surface and the lower surface of the fixing block, when the screw is locked on the fixing block, the lower end of the screw enters from the upper end of the locking hole and extends out from the lower end, and the lower end of the screw is provided with a third limiting part which blocks the lower end of the screw from retracting into the locking hole when the screw moves out of the locking hole. This technical scheme's beneficial effect lies in, the operator can be restricted to the spacing portion of third to the operation that shifts up of screw, prevents that the screw from breaking away from the fixed block and causing the screw to drop, prevents that the spacing portion of second that compresses tightly the piece from breaking away from and causing the piece rotation of compressing tightly with the first spacing portion of fixed block, can also prevent that the sealing member from breaking away from and causing sealed inefficacy from the lateral wall of fixed block.

Preferably, the third position-limiting part is any one of the following: a protrusion protruding from an outer circumferential surface of the screw adjacent to the lower end, a broken thread on the outer circumferential surface of the screw adjacent to the lower end, and an adhesive covering the outer circumferential surface of the screw adjacent to the lower end.

Preferably, the screw still includes the nut, the nut setting is in the one end of the neighbouring non-screw thread district of screw, fixing device still includes the sealing member, sealing member and compressing tightly the piece cover and establish the non-screw thread district of screw, the sealing member is located the nut of screw and compresses tightly between the piece, and is located the screw with between the fixed block is with sealed the lockhole. The beneficial effects of this technical scheme lie in, can prevent through setting up the sealing member that body fluid from getting into fixing device in, avoid the metalwork among the fixing device to rust or the silica gel piece is ageing, can avoid the short circuit, improve fixing device's security and reliability.

the clamping piece is accommodated in the lock hole, an annular groove is formed in the inner circumferential surface of the clamping piece, the outer circumferential surface of a screw rod of the screw is divided into a threaded area and a non-threaded area, the threaded area of the screw is used for being in threaded connection with the lock hole, and the non-threaded area of the screw is provided with the annular groove;

one part of the inclined ring spring is accommodated in the annular groove of the pressing piece, and the other part of the inclined ring spring protrudes out of the inner circumferential surface of the pressing piece and is accommodated in the annular groove of the screw in a clearance manner;

be provided with first spacing portion on the fixed block, it is provided with the spacing portion of second to compress tightly on the piece, first spacing portion prevents when the spacing portion of second has the interact compress tightly the piece and be in along with screw pivoted structure when the screw is screwed in, the screw locking is in when on the fixed block, the screw is right compress tightly the piece and apply the effort, and pass through compress tightly the piece and fix the wire rod in the wire hole. This technical scheme's beneficial effect lies in, compresses tightly the piece through the setting, and the locking piece locking is in-process on the fixed block, compress tightly the piece and do not rotate, can prevent that the wire from removing and the dislocation. Through setting up the inclined coil spring, can conveniently will compress tightly a piece and remove at least partly in the lockhole to make things convenient for dismouting wire rod.

Preferably, the inner diameter of the canted coil spring is greater than the outer diameter of the threaded region of the screw. The beneficial effect of this technical scheme lies in, the oblique circle spring of above-mentioned structure makes things convenient for fixing device's equipment.

Preferably, the locking hole penetrates through the upper surface and the lower surface of the fixing block, when the screw is locked on the fixing block, the lower end of the screw enters from the upper end of the locking hole and extends out of the lower end, and the lower end of the screw is provided with a third limiting part which blocks the lower end of the screw from retracting into the locking hole when the screw is moved out of the locking hole. This technical scheme's beneficial effect lies in, the operator can be restricted to the spacing portion of third to the operation that shifts up of screw, prevents that the screw from breaking away from the fixed block and causing the screw to drop, prevents that the spacing portion of second that compresses tightly the piece from breaking away from and causing the piece rotation of compressing tightly with the first spacing portion of fixed block, can also prevent that the sealing member from breaking away from and causing sealed inefficacy from the lateral wall of fixed block.

The utility model provides a fixing device for fixed wire rod, includes fixed block and screw, be provided with the line hole and the lockhole of intercommunication on the fixed block, the line hole is used for supplying the wire rod holding or passes, the screw holding is in the lockhole or pass lockhole and locking are in on the fixed block, fixing device still includes: the pressing piece is accommodated in the lock hole;

the pressing piece is provided with a first driving part protruding out of the inner peripheral surface, the outer peripheral surface of a screw rod of the screw is provided with an annular groove, and the first driving part is accommodated in the annular groove of the screw in a clearance mode; or the screw is provided with a second driving part protruding out of the outer peripheral surface, the inner peripheral surface of the pressing piece is provided with an annular groove, and the second driving part is accommodated in the annular groove of the pressing piece in a clearance manner;

be provided with first spacing portion on the fixed block, it is provided with the spacing portion of second to compress tightly on the piece, first spacing portion prevents when the spacing portion of second has the interact compress tightly the piece and be in along with screw pivoted structure when the screw is screwed in, the screw locking is in when on the fixed block, the screw is right compress tightly the piece and apply the effort, and pass through compress tightly the piece and fix the wire rod in the wire hole. This technical scheme's beneficial effect lies in, compresses tightly the piece through the setting, and the locking piece locking is in-process on the fixed block, compress tightly the piece and do not rotate, can prevent that the wire from removing and the dislocation. Through setting up first drive portion or second drive portion, can conveniently will compress tightly a part and remove at least partly in following the lockhole to make things convenient for the dismouting wire rod.

Preferably, the screw further comprises a nut, the outer peripheral surface of the screw rod of the screw is divided into a threaded area and a non-threaded area, the nut is arranged at one end, close to the non-threaded area, of the screw, the fixing device further comprises a sealing element, the sealing element and the pressing element are sleeved on the non-threaded area of the screw, the sealing element is located between the nut of the screw and the pressing element and located between the screw and the fixing block to seal the lock hole. The beneficial effects of this technical scheme lie in, can prevent through setting up the sealing member that body fluid from getting into fixing device in, avoid the metalwork among the fixing device to rust or the silica gel piece is ageing, can avoid the short circuit, improve fixing device's security and reliability.

A medical device comprising a fixing means as claimed in any preceding claim.

Preferably, the medical apparatus is any one of an implantable electrical nerve stimulation device, an implantable cardiac electrical stimulation system, an implantable drug infusion device and a lead switching device.

Drawings

The present application is further described below with reference to the drawings and examples.

Fig. 1 is a schematic cross-sectional view of a prior art fastening assembly.

Fig. 2 is a schematic view of the fixing assembly of fig. 1 in use in fixing a wire.

Fig. 3 is a schematic structural diagram of a fixing device provided in embodiment 1 of the present application.

Fig. 4 is an exploded view of the fixing device provided in embodiment 1 of the present application.

Fig. 5 is a schematic structural diagram of a fixing block provided in embodiment 1 of the present application.

Fig. 6 is a schematic structural view of a pressing member provided in embodiment 1 of the present application.

Fig. 7 is a schematic top view of a fixing device provided in embodiment 1 of the present application.

Figure 8 is a schematic cross-sectional view of the fastening device of figure 7 taken along line AA'.

Figure 9 is a schematic cross-sectional view of the fixation device of figure 7 taken along line BB'.

Fig. 10 is an exploded view of a fixing block and a pressing member in another embodiment of example 1 of the present application.

Fig. 11 is an exploded view of a fixing block and a pressing member in another embodiment of example 1 of the present application.

Fig. 12 is a side view of a fixture in another embodiment of example 1 of the present application.

Fig. 13 is a side view of a fixture in another embodiment of example 1 of the present application.

Fig. 14 is a schematic structural view of a screw in another embodiment of example 1 of the present application.

Fig. 15 is an exploded view of a fixing device provided in embodiment 2 of the present application.

Fig. 16 is a schematic top view of a fixing device provided in embodiment 2 of the present application.

Figure 17 is a schematic cross-sectional view of the fixture of figure 16 taken along line CC'.

Fig. 18 is a schematic top view of a fixing device provided in embodiment 3 of the present application.

Figure 19 is a schematic cross-sectional view of the fixture of figure 18 taken along line DD'.

In the figure: 10. a fixed block; 11. a wire hole; 12. a lock hole; 13. a first limiting part; 14. mounting holes; 20. a screw; 21. a third limiting part; 22. a nut; 30. a compression member; 31. a circular inner hole; 32. a bevel; 33. a pin hole; 34. a second limiting part; 35. a first driving section; 41. a spacing pin; 42. a canted coil spring; 50. a seal member; 101. a fixed block; 102. a fixing member; 103. a locking portion; 104. a pressing part; 105. an accommodating hole; 106. a wire; 107. provided is a screwdriver.

Detailed Description

The present application is further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the present application, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment without conflict.

Referring to fig. 1 and 2, when the fixing assembly disclosed in chinese patent publication No. CN111529937A is used to fix the conducting wire 106, taking the screwdriver 107 rotating clockwise to screw into the fixing member 102 as an example, when fastening, the fixing member 102 is subjected to the torque force of the clockwise rotation of the screwdriver 107, during the locking process, the pressing portion 104 of the fixing member 102 contacts with the conducting wire 106 and applies a force to the conducting wire 106, and when the fixing member 102 rotates clockwise, the conducting wire 106 is easily moved in the tangential direction of the rotating direction of the fixing member 102, for example, the upper conducting wire 106 moves to the right, and the lower conducting wire 106 moves to the left. Conversely, when the screwdriver 107 is rotated counterclockwise to screw in the fastener 102, the upper wire 106 is likely to move to the left and the lower wire 106 to move to the right. Therefore, whether screwdriver 107 is screwed clockwise or counterclockwise into holder 102, it is prone to lead to movement and misalignment of wire 106.

Example 1

Referring to fig. 3 to 12, in view of the defects of the prior art, the present embodiment provides a fixing device for fixing a wire, the fixing device including: the fixed block 10, the locking member and the pressing member 30, and may further include a driving member and a sealing member 50.

The fixed block 10 is provided with a line hole 11 and a lock hole 12 which are communicated. The wire holes 11 are used for accommodating or passing through wires, the wire holes 11 may be circular through holes penetrating through the front and back surfaces of the fixing block 10, the wires are, for example, wires, in this embodiment, two wire holes 11 are formed in the fixing block 10, and in other embodiments, one, three, four, or more wire holes 11 in the fixing block 10 may also be formed. The lockhole 12 is used for holding the locking piece or supplies the locking piece to pass, and the lockhole 12 can be the round hole or the dysmorphism hole that runs through two sides about the fixed block 10, can also be from the blind hole of the upper surface downwardly extending of fixed block 10, and in this embodiment, the lockhole 12 runs through the upper and lower two sides of fixed block 10, and the part aperture that is close to the fixed block 10 upper surface of lockhole 12 is greater than the part aperture that is close to the fixed block 10 lower surface, is equipped with the internal thread in the hole that is close to the fixed block 10 lower surface of lockhole.

The locking member is accommodated in the locking hole 12 or passes through the locking hole 12 to be locked on the fixed block 10, in this embodiment, the locking member is a screw 20, and the locking member is the screw 20 and will be described in detail below. The outer peripheral surface of the screw rod of the screw 20 can be divided into a threaded area and a non-threaded area, the threaded area of the screw 20 is used for being screwed with the lock hole 12, the non-threaded area of the screw 20 is provided with an annular groove, and the upper end of the screw 20 can be provided with a hole for inserting a screwdriver bit.

The pressing member 30 is received in the locking hole 12, and since the locking hole 12 communicates with the wire hole 11, after the pressing member 30 is received in the locking hole 12, the pressing member 30 contacts the wire material to press the wire material. In this embodiment, referring to fig. 6, the compression member 30 has a circular inner hole 31, and the circular inner hole 31 is used for the screw 20 to pass through. In the present embodiment, the pressing member 30 has a slope 32 connecting a side surface and a bottom surface of the pressing member 30, the slope 32 is used for contacting with the wire to press the wire, and in other embodiments, the side surface of the pressing member 30 has an annular protrusion (not shown), and the bottom surface of the annular protrusion of the pressing member 30 is used for contacting with the wire to press the wire. In this embodiment, the pressing member 30 is provided with a pin hole 33, the pin hole 33 communicates with the circular inner hole 31 and the side surface of the pressing member 30, the pressing member 30 may be provided with two pin holes 33, and the two pin holes 33 may be symmetrically disposed on the pressing member 30. The contact surface of the wire pressing material of the pressing member 30 may be a plane, or may be an arc surface, preferably a plane. When the contact surface of the wire pressing material is a plane, the width and height of the plane can be 0.5-3 times, such as 0.8 times, 1.2 times, 1.8 times, 2 times or 2.5 times of the radial section diameter of the wire, and the design of the pressing piece 3 has a better pressing effect.

During the locking of the screw 20 to the fixed block 10, the pressure element 30 does not rotate, and the pressure element 30 does not rotate, for example, in a plane perpendicular to the direction of movement of the screw 20. The screw 20 applies force to the pressing member 30 and fixes the wire in the wire hole 11 through the pressing member 30, thereby preventing the wire from moving and dislocating along with the screw 20 when the screw 20 is locked.

Specifically, in this embodiment, referring to fig. 5 and 6, the fixing block 10 is provided with one or more first limiting portions 13, the number of the first limiting portions 13 may be one or more, the pressing member 30 is provided with one or more second limiting portions 34, and the first limiting portions 13 and the second limiting portions 34 have a structure that prevents the pressing member 30 from rotating with the screw 20 when the screw 20 is screwed in, when interacting with each other. The structure for preventing the pressing member 30 from rotating with the screw 20 when the screw 20 is screwed in may be one or a combination of a curved surface structure, a concave-convex matching structure, a snap matching structure, a structure having a frosted surface, and a structure having a convex point, which interact with each other.

Referring to fig. 5 and 6, in the present embodiment, the first position-limiting portion 13 is a convex portion on the inner circumferential surface of the locking hole 12, the second position-limiting portion 34 is a concave portion on the outer circumferential surface of the pressing member 30, the concave portion may be a tangent plane formed on a side surface of the pressing member 30, after the pressing member 30 is accommodated in the locking hole 12, the convex portion of the locking hole 12 is buckled with the concave portion of the pressing member 30, and when the screw 20 is screwed into the locking hole 12, the first position-limiting portion 13 and the second position-limiting portion 34 which are matched with each other can prevent the pressing member 30 from rotating with the screw 20, thereby preventing the wires in the wire hole 11 from moving. When the screw 20 is locked on the fixing block 10, the screw 20 applies force to the pressing member 30, and the wire is fixed in the wire hole 11 through the pressing member 30.

In another embodiment, referring to fig. 10, the first stopper 13 is a dovetail-shaped protrusion on the inner circumferential surface of the locking hole 12, and the second stopper 34 is a dovetail-shaped groove on the outer circumferential surface of the pressing member 30, and the dovetail-shaped protrusion and the dovetail-shaped groove are matched in structure, so that when the screw 20 is screwed into the locking hole 12, the pressing member 30 can be prevented from rotating with the screw 20 and the wire can be prevented from moving and being displaced.

In another embodiment, referring to fig. 11, the first position-limiting portion 13 is a linear projection on the inner circumferential surface of the locking hole 12, and the second position-limiting portion 34 is a linear groove on the outer circumferential surface of the pressing member 30, and the linear projection and the linear groove are matched in structure, so that when the screw 20 is screwed into the locking hole 12, the pressing member 30 can be prevented from rotating with the screw 20 and the wire can be prevented from moving and being displaced.

Alternatively, the first position-limiting portion 13 may be a concave portion on the inner circumferential surface of the locking hole 12, the second position-limiting portion 34 may be a convex portion on the outer circumferential surface of the pressing member 30, the concave portion may be a dovetail groove or a linear groove, and the convex portion may be a dovetail-shaped projection or a linear projection, respectively, and the first position-limiting portion 13 and the second position-limiting portion 34 of the above structure can prevent the pressing member 30 from rotating with the screw 20 and the movement and displacement of the wire rod when the screw 20 is screwed into the locking hole 12.

During the use of the fixing device, it is sometimes necessary to loosen the screw 20 and move the pressing member 30 out of the locking hole 12 at least partially to facilitate the assembly and disassembly of the wires. The fixing device of the embodiment may further include a driving member, the driving member may be disposed on the pressing member 30 or the screw 20, and when the screw 20 is removed from the locking hole 12, the screw 20 drives the pressing member 30 to move along the removing direction through the driving member.

When the driver is arranged on the pressing piece 30, the driver has a first protruding portion protruding out of the side surface of the pressing piece 30 facing the screw 20, and the screw 20 is provided with a first recessed portion for accommodating the first protruding portion of the driver, as a preferable mode, the first recessed portion is an annular groove arranged on the outer peripheral surface of the screw 20, and the first protruding portion and the first recessed portion are in clearance fit; when the driver is disposed on the screw 20, the driver has a second protruding portion protruding from a side surface of the screw 20 facing the pressing member 30, and the pressing member 30 is disposed with a second recessed portion for accommodating the second protruding portion of the driver, as a preferable mode, the second recessed portion is an annular groove disposed on an inner circumferential surface of the pressing member 30, and the second protruding portion and the second recessed portion are in clearance fit.

In this example, referring to fig. 4 and 9, the driving member is a stopper pin 41, a front end of the stopper pin 41 protrudes from an inner peripheral surface of the pressing member 30 and is received in the annular groove of the screw 20 with a clearance, and a rear end of the stopper pin 41 is fixed in the pin hole 33 of the pressing member 30. The front end of the stopper pin 41 may be a spherical head or a hemispherical head, and the rear end of the stopper pin 41 may be a flat surface. When the pressing member 30 needs to be moved out of the lock hole 12 by at least a part, the screw 20 is screwed out reversely, because the front end of the limit pin 41 protrudes out of the inner peripheral surface of the pressing member 30, the rear end of the limit pin 41 is fixed in the pin hole 33 of the pressing member 30, and under the action of the limit pin 41, the screw 20 drives the pressing member 30 to move out of the lock hole 12; when the wire rod needs to be pressed, the screw 20 is screwed into the lock hole 12, the screw 20 drives the pressing piece 30 to be accommodated in the lock hole 12 under the action of the limiting pin 41, and due to the clearance fit between the front end of the limiting pin 41 and the annular groove of the screw 20 and the action of the first limiting part 13 and the second limiting part 34, the screwing-in of the screw 20 cannot drive the pressing piece 30 to rotate, so that the wire rod can be pressed through the pressing piece 30, and the pressing piece 30 is prevented from rotating along with the screw 20 and moving and misplacing of the wire rod.

One assembling mode of the fixing device of the embodiment is that the pressing piece 30 is sleeved on the screw 20, and then the limit pin 41 is installed in the pin hole 33 of the pressing piece 30, at this time, the pressing piece 30 can rotate around the screw 20; then, assembling the screw 20 with the pressing piece 30 on the fixing block 10, and under the action of the first limiting part 13 and the second limiting part 34, only moving the pressing piece 30 in the moving-in direction to contact with the wire until the wire is pressed; on the contrary, when the reverse-screwing-out screw 20 unlocks the wire, the pressing member 30 only moves in the moving-out direction under the action of the first and second limiting

portions

13 and 34 until the wire is loosened.

In some embodiments, the pin hole 33 penetrates through the inner circumferential surface and the outer circumferential surface of the pressing member 30, and the rear end of the stopper pin 41 is flush with the outer circumferential surface of the pressing member 30 or is retracted into the pin hole 33 of the pressing member 30, so that when the pressing member 30 enters or moves out of the lock hole 12, the stopper pin 41 with the above structure can prevent the rear end of the stopper pin 41 from abutting against the fixed block 10, and preventing the pressing member 30 from entering or moving out. Referring to fig. 3, the fixing block 10 is provided with a mounting hole 14 corresponding to the pin hole 33 of the pressing member 30, and the fixing device of the embodiment is assembled by first placing the pressing member 30 in the lock hole 12, then screwing the screw 20, then installing the limit pin 41 in the pin hole 33 of the pressing member 30 through the mounting hole 14, and finally welding or bonding the rear end of the limit pin 41 in the pin hole 33 of the pressing member 30 through the mounting hole 14 by welding or bonding. The installation of the limit pin 41 is facilitated by the installation of the installation hole 14 on the fixing block 10.

In some embodiments, referring to fig. 12 to 14, the locking hole 12 penetrates through both upper and lower surfaces of the fixed block 10, when the screw 20 is locked to the fixed block 10, a lower end of the screw 20 enters from an upper end of the locking hole 12 and extends out from the lower end, and a lower end of the screw 20 is provided with a third stopper portion 21 that blocks the lower end of the screw 20 from being retracted into the locking hole 12 when the screw 20 is removed from the locking hole 12. Because the size of the fixing device is small, the installation and operation are inconvenient, the fixing device is difficult to reassemble after being completely disassembled, if the screw 20 is partially screwed out but is not completely separated from the lock hole 12, the screw 20 is installed again after the wire is installed in place, the operation difficulty is obviously reduced, and the operation time is shortened. In this embodiment, the third limiting portion 21 is disposed at the lower end of the screw 20, when the screw 20 is reversely screwed out, the third limiting portion 21 can stop the screw 20 from being screwed out of the lock hole 12, so as to limit the upward movement operation of the screw 20 by an operator, prevent the screw 20 from being separated from the fixed block 10 and causing the screw to fall off, prevent the second limiting portion 34 of the pressing member 30 from being separated from the first limiting portion 13 of the fixed block 10 and causing the pressing member 30 to rotate, and prevent the sealing member 50 from being separated from the side wall of the fixed block 10 and causing sealing failure, meanwhile, because the lower end of the screw 20 extends out from the lower end of the lock hole 12, when the screw 20 is reversely screwed out, the screw 20 has a certain free stroke, and can release the pressing force on the pressing member 30, thereby facilitating the assembly and disassembly of wires, and significantly reducing the operation difficulty and shortening the.

The third stopper portion 21 may be a protrusion protruding from the outer peripheral surface of the screw 20 adjacent to the lower end, and the third stopper portion 21 may be formed at the lower end of the screw 20 in any one of the following manners: referring to fig. 13, a through hole is formed at the lower end of the screw 20, and a stopper pin is inserted through the through hole to form a third stopper portion 21; coating an adhesive on the threads on the outer peripheral surface of the screw 20 adjacent to the lower end, wherein the adhesive blocks the threads after fixation, so that the screw 20 is not matched with the lock hole 12 of the fixed block 10; referring to fig. 14, the lower end of the screw 20 is flattened by means of clinching to form a protrusion, and the protrusion on the lower end of the screw 20 in fig. 14 is formed by means of a clinching apparatus after the screw 20 is assembled to the fixing block 10; one or more welding spots are provided on the screw thread on the outer circumferential surface of the screw 20 adjacent to the lower end, for example, by laser welding, to break the screw thread, resulting in the screw 20 not being engaged with the locking hole 12 of the fixed block 10.

Referring to fig. 4 and 9, in some embodiments, the screw 20 further includes a nut 22, the nut 22 is disposed at an end of the screw 20 adjacent to the non-threaded region, the fixing device further includes a sealing member 50, the sealing member 50 can seal a rubber ring, the cross section of the sealing member 50 can be circular or irregular, the sealing member 50 and the pressing member 30 are sleeved on the non-threaded region of the screw 20, the sealing member 50 is located between the nut 22 of the screw 20 and the pressing member 30 and between the screw 20 and the fixing block 10, the screw 20 is screwed in and applies pressure to the sealing member 50, and the sealing member 50 seals the edge gap of the lock hole 12. In the present embodiment, the upper end of the pressing member 30 is provided with a stepped surface for placing the seal 50. Because the fixing device is easy to contact body fluid after being implanted into a human body, the body fluid can be prevented from entering the fixing device by arranging the sealing element 50, the metal piece in the fixing device is prevented from rusting or the silica gel piece is prevented from aging, and in addition, if an electric conductor exists in the fixing device, the body fluid is easy to cause short circuit after entering, so that the sealing element 50 is arranged to avoid short circuit, and the safety and the reliability of the fixing device are improved.

In some embodiments, the plurality of wire holes 11 are formed in the fixed block 10, the pressing member 30 is an electric conductor, the pressing member 30 may be made of metal or alloy, and by forming the fixed block 10 as an electric conductor, conduction of the wires in the plurality of wire holes 11 may be achieved. In other embodiments, the wires in the plurality of wire holes 11 are insulated from each other as needed, and the fixing block 10 may be a non-conductive body, such as a plastic or silicon rubber member.

In some embodiments, the material of each component of the fixing device is any one of the following materials: plastic, silica gel, metal. Each part of the fixing device can be manufactured in the modes of 3D printing, numerical control processing, stamping, injection molding and the like.

Example 2

Referring to fig. 15 to 17, the present embodiment provides a fixing device for fixing a wire, the fixing device including: the fixing block 10, the screw 20, the pressing member 30 and the inclined coil spring 42, and may further include a sealing member 50.

The fixed block 10 is provided with a wire hole 11 and a lock hole 12 which are communicated, and the wire hole 11 is used for accommodating or passing through wires. The structure, arrangement and effect of the fixing block 10 may be the same as or similar to those of embodiment 1, and are not described herein again.

The screw 20 is accommodated in the locking hole 12 or passes through the locking hole 12 and is locked on the fixed block 10, the outer circumferential surface of the screw rod of the screw 20 can be divided into a threaded area and a non-threaded area, the threaded area of the screw 20 is used for being screwed with the locking hole 12, the non-threaded area of the screw 20 is provided with an annular groove, and the structure, the arrangement mode and the implementation effect of the screw 20 can be the same as or similar to those of the embodiment 1, and are not repeated herein.

The pressing piece 30 is accommodated in the lock hole 12, the first limiting portion 13 is arranged on the fixed block 10, the second limiting portion 34 is arranged on the pressing piece 30, the first limiting portion 13 and the second limiting portion 34 have a structure which can prevent the pressing piece 30 from rotating along with the screw 20 when the screw 20 is screwed in when interacting with each other, when the screw 20 is locked on the fixed block 10, the screw 20 applies acting force to the pressing piece 30, and the wire rod is fixed in the wire hole 11 through the pressing piece 30. The structure, arrangement and effect of the first position-limiting portion 13 may be the same as or similar to those of embodiment 1, and the structure, arrangement and effect of the second position-limiting portion 34 may be the same as or similar to those of embodiment 1, which is not described herein again.

Referring to fig. 17, an annular groove is provided on an inner circumferential surface of the pressing member 30, a portion of the inclined coil spring 42 is received in the annular groove of the pressing member 30, and another portion of the inclined coil spring 42 protrudes from the inner circumferential surface of the pressing member 30 and is received in the annular groove of the screw 20 with a gap. The inclined coil spring 42 of the present embodiment, as a driver, can function the same as or similar to the stopper pin 41 of embodiment 1 in cooperation with the annular groove of the screw 20.

Specifically, when the pressing member 30 needs to be moved out of the locking hole 12 by at least a portion, the screw 20 is reversely screwed out, because a portion of the inclined coil spring 42 is accommodated in the annular groove of the pressing member 30, and another portion of the inclined coil spring protrudes out of the inner circumferential surface of the pressing member 30 and is accommodated in the annular groove of the screw 20 with a gap, the screw 20 drives the pressing member 30 to move out of the locking hole 12 under the action of the inclined coil spring 42; when the wire rod needs to be pressed, the screw 20 is screwed into the lock hole 12, the screw 20 drives the pressing piece 30 to be accommodated in the lock hole 12 under the action of the inclined ring spring 42, and due to the fact that the protruding portion of the inclined ring spring 42 is in clearance fit with the annular groove of the screw 20 and the action of the first limiting portion 13 and the second limiting portion 34, the screwing-in of the screw 20 cannot drive the pressing piece 30 to rotate, and therefore the wire rod can be pressed through the pressing piece 30 and the pressing piece 30 is prevented from rotating along with the screw 20 and moving and misplacing of the wire rod.

In some embodiments, the inner diameter of the canted coil spring 42 is greater than the outer diameter of the threaded region of the screw 20. One way of assembling the fixing device of this embodiment is to install the inclined coil spring 42 in the annular groove of the pressing member 30, then place the pressing member 30 in the locking hole 12, and finally screw in the screw 20. By setting the inner diameter of the inclined coil spring 42 to be larger than the outer diameter of the threaded area of the screw 20, during screwing in the screw 20, the threaded area of the screw 20 is small in size and cannot contact with the inclined coil spring 42, the non-threaded area of the screw 20 contacts with the inclined coil spring 42 and then presses the inclined coil spring 42, the inclined coil spring 42 is stressed to be inclined and deformed until the inclined coil spring 42 is aligned with the annular groove of the screw 20, the inclined coil spring 42 releases pressure, a part of the inclined coil spring 42 is accommodated in the annular groove of the screw 20, at the moment, the screw 20 and the pressing piece 30 can only relatively rotate, and the pressing piece 30 does not rotate. The canted coil spring 42 of the above construction facilitates assembly of the fixture.

In some embodiments, the locking hole 12 penetrates through both upper and lower surfaces of the fixing block 10, when the screw 20 is locked to the fixing block 10, a lower end of the screw 20 enters from an upper end of the locking hole 12 and extends out from the lower end, and a lower end of the screw 20 is provided with a third stopper portion 21 that blocks the lower end of the screw 20 from being retracted into the locking hole 12 when the screw 20 is removed from the locking hole 12. The structure, arrangement and effect of the third limiting portion 21 may be the same as or similar to those of embodiment 1, and are not described herein again.

In some embodiments, the screw 20 further includes a nut 22, the nut 22 is disposed at an end of the screw 20 adjacent to the non-threaded region, the fixing device further includes a sealing member 50, the sealing member 50 and the pressing member 30 are disposed on the non-threaded region of the screw 20, and the sealing member 50 is disposed between the nut 22 of the screw 20 and the pressing member 30 and between the screw 20 and the fixing block 10 to seal the locking hole 12. The structure, arrangement and effects of the sealing member 50 may be the same as or similar to those of embodiment 1, and are not described in detail herein.

Example 3

Referring to fig. 18 and 19, the present embodiment provides a fixing device for fixing a wire, the fixing device including: the fixing block 10, the screw 20 and the pressing member 30 may further include a sealing member 50.

The screw 20 is accommodated in the locking hole 12 or passes through the locking hole 12 and is locked on the fixed block 10, an annular groove is arranged on the outer peripheral surface of the screw rod of the screw 20, the outer peripheral surface of the screw rod of the screw 20 can be divided into a threaded area and a non-threaded area, the threaded area of the screw 20 is used for being screwed with the locking hole 12, the non-threaded area of the screw 20 can be used for arranging the annular groove, and the structure, the arrangement mode and the realization effect of the screw 20 can be the same as or similar to those of embodiment 1, and are not repeated herein.

In this embodiment, the pressing member 30 is provided with a first driving portion 35 protruding from the inner peripheral surface, an annular groove is provided on the outer peripheral surface of the screw rod of the screw 20, and the first driving portion 35 is received in the annular groove of the screw 20 with a gap. The outer circumferential surface of the shank of the screw 20 may be divided into a threaded region for screwing with the locking hole 12 and a non-threaded region for providing the annular groove with the threaded region of the screw 20. The first driving portion 35 of the pressing member 30 of this embodiment serves as a driving member, and cooperates with the annular groove of the screw 20 to perform the same or similar function as the stopper pin 41 of embodiment 1.

Specifically, when the pressing member 30 needs to be moved out of the locking hole 12 by at least a portion, the screw 20 is reversely screwed out, and because the first driving portion 35 of the pressing member 30 is received in the annular groove of the screw 20 with a clearance, the screw 20 drives the pressing member 30 to move out of the locking hole 12 under the action of the first driving portion 35; when the wire rod needs to be pressed, the screw 20 is screwed into the lock hole 12, under the action of the first driving portion 35, the screw 20 drives the pressing piece 30 to be accommodated in the lock hole 12, due to the fact that the first driving portion 35 of the pressing piece 30 is in clearance fit with the annular groove of the screw 20, and due to the action of the first limiting portion 13 and the second limiting portion 34, the screwing-in of the screw 20 cannot drive the pressing piece 30 to rotate, therefore, the wire rod can be pressed through the pressing piece 30, and the pressing piece 30 is prevented from rotating along with the screw 20 and moving and misplacing of the wire rod.

In some embodiments, the screw 20 is provided with a second driving portion (not shown) protruding from the outer peripheral surface, the second driving portion may be disposed in a non-threaded region of the screw 20, an annular groove is disposed on the inner peripheral surface of the pressing member 30, and the second driving portion is gap-received in the annular groove of the pressing member 30. Referring to the above-mentioned action of the first driving portion 35 of the pressing member 30 and the annular groove of the screw 20, it can be understood that, in the present embodiment, the second driving portion of the screw 20 and the annular groove of the pressing member 30 also have the same or similar action as described above.

Example 4

This embodiment provides a medical device comprising the fixation apparatus according to any one of embodiments 1 to 3. In some embodiments, the medical device is an Implantable medical device, such as any one of an Implantable electrical nerve stimulation device, an Implantable cardiac electrical stimulation System (also called a cardiac pacemaker), an Implantable Drug Delivery System (I DDS), and a lead switching device. Examples of the implantable neural electrical Stimulation device include Deep Brain Stimulation (DBS), Cortical Brain Stimulation (CNS), Spinal Cord Stimulation (SCS), Sacral Nerve Stimulation (SNS), and Vagal Nerve Stimulation (VNS).

While the present application is described in terms of various aspects, including exemplary embodiments, the principles of the invention should not be limited to the disclosed embodiments, but are also intended to cover various modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a fixing device for fixed wire rod, includes fixed block and locking piece, be provided with the line hole and the lockhole of intercommunication on the fixed block, the line hole is used for supplying the wire rod holding or passes, the locking piece holding is in or passes in the lockhole and locking are in on the fixed block, its characterized in that still includes and compresses tightly the piece, it is in to compress tightly the piece holding in the lockhole, the locking piece locking is in-process on the fixed block, compress tightly the piece and do not rotate, the locking piece is right compress tightly the piece and apply the effort, and pass through it fixes the wire rod in the wire hole.

2. The fixing device as claimed in claim 1, wherein the fixing block is provided with a first limiting portion, the pressing member is provided with a second limiting portion, and the first limiting portion and the second limiting portion have a structure for preventing the pressing member from rotating in the lock hole when interacting with each other.

3. The fixing device of claim 2, wherein the structure for preventing the pressing member from rotating in the lock hole is one or more of a combination of a curved surface structure, a concave-convex matching structure, a snap-fit matching structure, a structure with a frosted surface and a structure with convex points.

4. The fixing device according to claim 1, further comprising a driver provided on the pressing member or the lock member, wherein when the lock member is removed from the lock hole, the lock member drives the pressing member to move in the removing direction by the driver.

5. A fixing device according to claim 4, wherein the driver is provided on the pressing member, the driver having a first projecting portion projecting from a side of the pressing member facing the locking member, the locking member being provided with a first recess portion for receiving the first projecting portion of the driver;

when the driving piece is arranged on the locking piece, the driving piece is provided with a second protruding part protruding out of the side face, facing the pressing piece, of the locking piece, and a second concave part for accommodating the second protruding part of the driving piece is arranged on the pressing piece.

6. The securing device of claim 5, wherein the first recess is an annular groove disposed on an outer peripheral surface of the locking member, and the first protrusion is in clearance fit with the first recess; the second depressed part is an annular groove arranged on the inner peripheral surface of the pressing piece, and the second protruding part is in clearance fit with the second depressed part.

7. The fixing device according to claim 4, wherein the driving member is a stopper pin, the pressing member is provided with a pin hole, the locking member is provided with an annular groove on an outer peripheral surface thereof, a front end of the stopper pin protrudes out of the inner peripheral surface of the pressing member and is received in the annular groove of the locking member with clearance, and a rear end of the stopper pin is fixed in the pin hole of the pressing member.

8. The fastening device according to claim 4, wherein the driving member is a coil spring, and the pressing member and the lock member are provided with annular grooves on an inner peripheral surface thereof, and a part of the coil spring is accommodated in the annular groove of the pressing member, and another part of the coil spring protrudes from the inner peripheral surface of the pressing member and is accommodated in the annular groove of the lock member with clearance.

9. The securing device according to claim 5, wherein the outer circumferential surface of the lock member is divided into a threaded section and a non-threaded section, the threaded section of the lock member being adapted to be threadedly engaged with the lock hole;

10. The fixing device according to claim 1, wherein the pressing member is provided with a first driving portion protruding from an inner peripheral surface, an annular groove is formed in an outer peripheral surface of the locking member, the first driving portion is received in the annular groove of the locking member with a gap, and when the locking member is removed from the lock hole, the pressing member is driven by the locking member to move in a removal direction through interaction between the first driving portion and the annular groove of the locking member; alternatively, the first and second electrodes may be,

the locking piece is provided with a second driving portion protruding out of the outer peripheral face, an annular groove is formed in the inner peripheral face of the pressing piece, the second driving portion is contained in the annular groove of the pressing piece in a clearance mode, and when the locking piece moves out of the lock hole, the locking piece drives the pressing piece to move in the moving-out direction through interaction of the second driving portion and the annular groove of the pressing piece.

11. The fixing device according to claim 1, wherein the locking hole penetrates through both upper and lower surfaces of the fixing block, and when the locking member is locked to the fixing block, a lower end of the locking member enters from an upper end of the locking hole and extends from the lower end, and the lower end of the locking member is provided with a third limiting portion that blocks the lower end of the locking member from being retracted into the locking hole when the locking member is removed from the locking hole.

12. The fixing device according to claim 11, wherein the third position-limiting portion is any one of: the locking device comprises a bulge protruding out of the outer peripheral surface of the locking piece adjacent to the lower end, damaged threads on the outer peripheral surface of the locking piece adjacent to the lower end and adhesive coating the outer peripheral surface of the locking piece adjacent to the lower end.

13. The fixing device according to claim 1, wherein a plurality of wire holes are provided in the fixing block, and the pressing member is an electric conductor.

14. The fixture of claim 1, further comprising a seal disposed between the locking member and the fixed block to seal the locking hole.

15. The fastening device according to claim 1, wherein each member of the fastening device is made of any one of the following materials: plastic, silica gel, metal.

16. The utility model provides a fixing device for fixed wire rod, includes fixed block and screw, be provided with the line hole and the lockhole of intercommunication on the fixed block, the line hole is used for supplying the wire rod holding or passes, the screw holding is in the lockhole or pass lockhole and locking are in on the fixed block, its characterized in that still includes:

be provided with first spacing portion on the fixed block, it is provided with the spacing portion of second to compress tightly on the piece, first spacing portion prevents when the spacing portion of second has the interact compress tightly the piece and be in along with screw pivoted structure when the screw is screwed in, the screw locking is in when on the fixed block, the screw is right compress tightly the piece and apply the effort, and pass through compress tightly the piece and fix the wire rod in the wire hole.

17. The fixing device according to claim 16, wherein the first stopper portion is a convex portion on an inner peripheral surface of the lock hole, and the second stopper portion is a concave portion on an outer peripheral surface of the pressing member; or, the first limiting part is a concave part on the inner circumferential surface of the lock hole, and the second limiting part is a convex part on the outer circumferential surface of the pressing piece.

18. The fixing device according to claim 16, wherein the pin hole penetrates through an inner circumferential surface and an outer circumferential surface of the pressing member, and a rear end of the stopper pin is flush with or retracted into the pin hole of the pressing member.

19. The fastening device of claim 18, wherein the fastening block is provided with a mounting hole corresponding to the pin hole of the pressing member.

20. The fixing device as claimed in claim 16, wherein the locking hole penetrates upper and lower surfaces of the fixing block, a lower end of the screw enters from an upper end of the locking hole and extends from the lower end when the screw is locked to the fixing block, and a third stopper portion for blocking the lower end of the screw from being retracted into the locking hole when the screw is removed from the locking hole is provided at the lower end of the screw.

21. The fixing device according to claim 20, wherein the third position-limiting portion is any one of: a protrusion protruding from an outer circumferential surface of the screw adjacent to the lower end, a broken thread on the outer circumferential surface of the screw adjacent to the lower end, and an adhesive covering the outer circumferential surface of the screw adjacent to the lower end.

22. The fastening device of claim 16, wherein the screw further comprises a nut disposed at an end of the screw adjacent to the non-threaded region, the fastening device further comprising a sealing member disposed between the nut and the pressing member of the screw and between the screw and the anchor block to seal the locking hole.

23. The utility model provides a fixing device for fixed wire rod, includes fixed block and screw, be provided with the line hole and the lockhole of intercommunication on the fixed block, the line hole is used for supplying the wire rod holding or passes, the screw holding is in the lockhole or pass lockhole and locking are in on the fixed block, its characterized in that still includes:

24. The fixation device of claim 23, wherein an inner diameter of the canted coil spring is greater than an outer diameter of the threaded region of the screw.

25. The fixing device according to claim 23, wherein the first stopper portion is a convex portion on an inner peripheral surface of the lock hole, and the second stopper portion is a concave portion on an outer peripheral surface of the pressing member; or, the first limiting part is a concave part on the inner circumferential surface of the lock hole, and the second limiting part is a convex part on the outer circumferential surface of the pressing piece.

26. The fixing device as claimed in claim 23, wherein the locking hole penetrates upper and lower surfaces of the fixing block, a lower end of the screw enters from an upper end of the locking hole and extends from the lower end when the screw is locked to the fixing block, and a third limiting portion for blocking the lower end of the screw from being retracted into the locking hole when the screw is removed from the locking hole is provided at the lower end of the screw.

27. The securing device according to claim 26, wherein the third position-limiting portion is any one of: a protrusion protruding from an outer circumferential surface of the screw adjacent to the lower end, a broken thread on the outer circumferential surface of the screw adjacent to the lower end, and an adhesive covering the outer circumferential surface of the screw adjacent to the lower end.

28. The fastening device of claim 23, wherein the screw further comprises a nut disposed at an end of the screw adjacent to the non-threaded region, the fastening device further comprising a sealing member disposed between the nut and the pressing member of the screw and between the screw and the fastening block to seal the locking hole.

29. The utility model provides a fixing device for fixed wire rod, includes fixed block and screw, be provided with the line hole and the lockhole of intercommunication on the fixed block, the line hole is used for supplying the wire rod holding or passes, the screw holding is in the lockhole or pass lockhole and locking are in on the fixed block, its characterized in that, fixing device still includes: the pressing piece is accommodated in the lock hole;

30. The fixing device according to claim 29, wherein the first stopper portion is a convex portion on an inner peripheral surface of the lock hole, and the second stopper portion is a concave portion on an outer peripheral surface of the pressing member; or, the first limiting part is a concave part on the inner circumferential surface of the lock hole, and the second limiting part is a convex part on the outer circumferential surface of the pressing piece.

31. The fixing device as claimed in claim 29, wherein the locking hole penetrates upper and lower surfaces of the fixing block, a lower end of the screw enters from an upper end of the locking hole and extends from the lower end when the screw is locked to the fixing block, and a third stopper portion for blocking the lower end of the screw from being retracted into the locking hole when the screw is removed from the locking hole is provided at the lower end of the screw.

32. The securing device according to claim 31, wherein the third position-limiting portion is any one of: a protrusion protruding from an outer circumferential surface of the screw adjacent to the lower end, a broken thread on the outer circumferential surface of the screw adjacent to the lower end, and an adhesive covering the outer circumferential surface of the screw adjacent to the lower end.

33. The fastening device of claim 29, wherein the screw further comprises a nut, the outer circumference of the shaft of the screw is divided into a threaded region and a non-threaded region, the nut is disposed at an end of the screw adjacent to the non-threaded region, the fastening device further comprises a sealing member, the sealing member and the pressing member are sleeved on the non-threaded region of the screw, and the sealing member is disposed between the nut and the pressing member of the screw and between the screw and the fixing block to seal the locking hole.

34. A medical device, characterized in that it comprises a fixation device according to any one of claims 1 to 33.

35. The medical device of claim 34, wherein the medical device is any one of an implantable electrical nerve stimulation device, an implantable cardiac electrical stimulation system, an implantable drug infusion device, and a lead switching device.